WO2023112566A1 - 空気調節装置、冷凍装置、および輸送用コンテナ - Google Patents
空気調節装置、冷凍装置、および輸送用コンテナ Download PDFInfo
- Publication number
- WO2023112566A1 WO2023112566A1 PCT/JP2022/041900 JP2022041900W WO2023112566A1 WO 2023112566 A1 WO2023112566 A1 WO 2023112566A1 JP 2022041900 W JP2022041900 W JP 2022041900W WO 2023112566 A1 WO2023112566 A1 WO 2023112566A1
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- WIPO (PCT)
- Prior art keywords
- air
- gas separation
- separation membrane
- air conditioner
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/22—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/22—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion
- B01D53/225—Multiple stage diffusion
- B01D53/226—Multiple stage diffusion in serial connexion
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVATION OF FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES; CHEMICAL RIPENING OF FRUIT OR VEGETABLES
- A23B7/00—Preservation of fruit or vegetables; Chemical ripening of fruit or vegetables
- A23B7/14—Preserving or ripening with chemicals not covered by group A23B7/08 or A23B7/10
- A23B7/144—Preserving or ripening with chemicals not covered by group A23B7/08 or A23B7/10 in the form of gases, e.g. fumigation; Compositions or apparatus therefor
- A23B7/148—Preserving or ripening with chemicals not covered by group A23B7/08 or A23B7/10 in the form of gases, e.g. fumigation; Compositions or apparatus therefor in a controlled atmosphere, e.g. partial vacuum, comprising only CO2, N2, O2 or H2O
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/268—Drying gases or vapours by diffusion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/74—Large containers having means for heating, cooling, aerating or other conditioning of contents
- B65D88/745—Large containers having means for heating, cooling, aerating or other conditioning of contents blowing or injecting heating, cooling or other conditioning fluid inside the container
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
- F25D11/003—Transport containers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
- F25D17/042—Air treating means within refrigerated spaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/80—Water
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/06—Polluted air
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/45—Gas separation or purification devices adapted for specific applications
- B01D2259/4566—Gas separation or purification devices adapted for specific applications for use in transportation means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D2588/00—Large container
- B65D2588/74—Large container having means for heating, cooling, aerating or other conditioning of contents
- B65D2588/743—Large container having means for heating, cooling, aerating or other conditioning of contents blowing or injecting heating, cooling or other conditioning fluid inside the container
- B65D2588/746—Large container having means for heating, cooling, aerating or other conditioning of contents blowing or injecting heating, cooling or other conditioning fluid inside the container with additional treatment function
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
- F25D2317/04—Treating air flowing to refrigeration compartments
Definitions
- the present disclosure relates to air conditioners, refrigerators, and shipping containers.
- Patent Literature 1 discloses an air conditioning device that adjusts the composition of the internal air in the internal space.
- An air conditioner includes a gas separation membrane. When the air to be treated flows through the gas separation membrane, some components (for example, oxygen and carbon dioxide) in the air to be treated permeate the gas separation membrane. The air whose composition has been adjusted in this manner is supplied to the internal space.
- the purpose of the present disclosure is to suppress the performance deterioration of the separation membrane due to the shutdown of the air conditioner.
- a first aspect is an air conditioning device that adjusts the composition of internal air in an internal space (5), A gas separation membrane (124) to which the air to be treated is supplied, and a control unit (191) for executing a first operation for suppressing deterioration of the performance of the gas separation membrane (124) due to stoppage of the air conditioner for a predetermined period. ).
- the performance of the gas separation membrane (124) can be suppressed from deteriorating due to the stoppage of the air conditioner for a predetermined period of time by the control unit (191) executing the first operation.
- a second aspect in the first aspect, includes a preliminary operation in which the first operation supplies the air to be treated to the gas separation membrane (124).
- preliminary operation is performed as the first operation, and the air to be treated is supplied to the gas separation membrane (124).
- the air to be treated flows through the gas separation membrane (124), thereby enlarging the pores of the gas separation membrane (124) and suppressing deterioration of the performance of the gas separation membrane (124).
- a third aspect is the second aspect, wherein the control unit (191) starts the preliminary operation after a predetermined time has elapsed since the air conditioning device was stopped.
- control unit (191) starts the preliminary operation after a predetermined time has elapsed since the air conditioner stopped. This prevents the air to be treated from flowing through the gas separation membrane (124) for a long period of time, thereby suppressing deterioration in the performance of the gas separation membrane (124).
- a fourth aspect is the second aspect, wherein the control unit (191) starts the preliminary operation a predetermined time before the start of the normal operation of the air conditioner.
- the preliminary operation is started a predetermined time before the start of normal operation of the air conditioner, deterioration of the performance of the gas separation membrane (124) can be suppressed before normal operation. This can prevent the gas separation membrane (124) from achieving sufficient performance in normal operation.
- a fifth aspect is the third or fourth aspect, wherein in the preliminary operation, the first air and the second air separated by the gas separation membrane (124) are discharged to the outside space (6). with road (103).
- the first air and the second air that have passed through the gas separation membrane (124) are discharged to the outside space (6) via the exhaust flow path (103). Therefore, it is possible to prevent the composition of the air in the internal space (5) from changing due to the execution of the preliminary operation.
- a sixth aspect in any one of the third to fifth aspects, is provided with a heating section (175) for heating the air supplied to the gas separation membrane (124) in the preliminary operation.
- the air heated by the heating section (175) is supplied to the gas separation membrane (124). This can improve the effect of recovering the performance of the gas separation membrane (124).
- a seventh aspect in any one of the third to sixth aspects, includes a pressurizing section (110) that pressurizes the air supplied to the gas separation membrane (124) in the preliminary operation.
- the air pressurized by the pressurizing section (110) is supplied to the gas separation membrane (124). This can improve the effect of recovering the performance of the gas separation membrane (124).
- a dehumidification section (111, 113, 130) is provided to reduce moisture in the air supplied to the gas separation membrane (124) in the preliminary operation.
- the air whose water content has been reduced in the dehumidification section (111, 113, 130) is supplied to the gas separation membrane (124).
- the gas separation membrane (124) As a result, it is possible to suppress deterioration in the performance of the gas separation membrane (124) due to the influence of water molecules in the air during the preliminary operation.
- a ninth aspect is any one of the first to eighth aspects, wherein the first operation includes an operation for prompting the person to operate the air conditioner.
- the operation of prompting the person to operate the air conditioner is performed, thereby preventing the air conditioner (100) from being stopped for a long period of time.
- the performance of the gas separation membrane (124) is possible to prevent the performance of the gas separation membrane (124) from deteriorating due to the suspension of the air conditioner for a predetermined period.
- control section (191) outputs information regarding the performance of the gas separation membrane (124).
- a person such as a user can grasp information about the performance of the gas separation membrane (124).
- An eleventh aspect is a refrigeration system comprising the air conditioner (100) of any one of the first to tenth aspects and a refrigerant circuit (30) for adjusting the temperature inside the internal space (5). be.
- a twelfth aspect is a shipping container comprising the refrigerating device (10) of the eleventh aspect and a container body (2) provided with the refrigerating device (10).
- FIG. 1 is a perspective view of the shipping container of the embodiment as viewed from the front side.
- FIG. 2 is a schematic longitudinal sectional view showing the internal structure of the shipping container of the embodiment.
- FIG. 3 is a piping system diagram of a refrigerant circuit of the transport refrigeration system of the embodiment.
- FIG. 4 is a block diagram showing a schematic configuration of the shipping container of the embodiment.
- FIG. 5 is a piping system diagram showing the configuration of the air conditioner of the embodiment.
- FIG. 6 is a schematic cross-sectional view of a gas separation module provided in the air conditioner of the embodiment.
- FIG. 7 is a schematic cross-sectional view of a water separation module provided in the air conditioner of the embodiment.
- FIG. 8 is a diagram corresponding to FIG.
- FIG. 5 showing the first operation of the air conditioner of the embodiment.
- FIG. 9 is a diagram corresponding to FIG. 5 showing the second operation of the air conditioner of the embodiment.
- FIG. 10 is a diagram corresponding to FIG. 5 showing the third operation of the air conditioner of the embodiment.
- FIG. 11 is a diagram corresponding to FIG. 5 showing the fourth operation of the air conditioner of the embodiment.
- FIG. 12 is a diagram corresponding to FIG. 5 showing the fifth operation of the air conditioner of the embodiment.
- FIG. 13 is a flowchart of control related to determination of start of preliminary operation of the air conditioner of the embodiment.
- FIG. 14 is a flowchart of control related to preliminary operation of the air conditioner of Modification 1.
- FIG. FIG. 15 is a diagram corresponding to FIG. 5 of the air conditioner of Modification 2.
- FIG. 16 is a diagram corresponding to FIG. 5 showing preliminary operation of the air conditioner of Modification 2.
- FIG. 17 is a diagram corresponding to FIG. 5 of the air conditioner of Modification 3.
- FIG. 18 is a flowchart of control regarding the first operation of the air conditioner of Modification 4.
- FIG. 19 is a flow chart of control for the second operation of the air conditioner of Modification 5.
- FIG. 20 is a diagram corresponding to FIG. 5 of the air conditioner of Modification 6.
- the shipping container (1) is a temperature-controlled reefer container. Shipping containers (1) are used to transport perishables such as fruits, vegetables and flowers. Perishables take in oxygen (O 2 ) from the air and release carbon dioxide (CO 2 ).
- O 2 oxygen
- CO 2 carbon dioxide
- the shipping container (1) comprises a container body (2) and a shipping refrigeration equipment (10) provided in the container body (2).
- Shipping containers (1) are used for maritime transport.
- a shipping container (1) is transported by a marine vehicle such as a ship.
- the shipping container (1) is equipped with an air conditioner (100).
- the air conditioner (100) adjusts the composition of the air inside the container body (2).
- Container Main Body The container main body (2) is a storage for storing perishables.
- the container body (2) is formed in a hollow box shape.
- the container body (2) is formed horizontally.
- An opening is formed at one longitudinal end of the container body (2).
- the opening of the container body (2) is closed by a transportation refrigeration system (10).
- a storage space (5) is formed as an internal space for storing objects to be transported.
- Refrigeration Equipment for Transportation The refrigeration equipment for transportation (10) is attached to the opening of the container body (2).
- a transportation refrigeration system (10) includes a casing (11) and a refrigerant circuit (30). The transportation refrigeration equipment (10) adjusts the temperature of the air (inside air) in the storage space (5).
- the casing (11) has a partition wall (12) and a partition plate (15).
- An internal flow path (20) is formed inside the partition wall (12).
- the internal flow path (20) and the external chamber (25) are separated by a partition wall (12).
- the partition wall (12) includes an outer wall (13) and an inner wall (14).
- the outer wall (13) of the warehouse is positioned outside the container body (2).
- the inner wall (14) is positioned inside the container body (2).
- the outer wall of the warehouse (13) blocks the opening of the container body (2).
- the outer wall (13) is attached to the periphery of the opening of the container body (2).
- the lower part of the outer wall (13) protrudes toward the inside of the container body (2).
- the outer chamber (25) is formed inside the bulging outer wall (13).
- the inner wall (14) faces the outer wall (13).
- the inner wall (14) has a shape along the outer wall (13).
- a heat insulating material (16) is provided between the inner wall (14) and the outer wall (13).
- the partition plate (15) is arranged inside the container body (2) rather than the inner wall (14).
- An internal flow path (20) is formed between the partition wall (12) and the partition plate (15).
- An inlet (21) is formed between the upper end of the partition plate (15) and the top plate of the container body (2).
- An outflow port (22) is formed between the lower end of the partition plate (15) and the lower end of the partition wall (12).
- the internal flow path (20) is formed from the inlet (21) to the outlet (22).
- the refrigerant circuit (30) has a refrigerant filled therein.
- the refrigerant circuit (30) performs a vapor compression refrigeration cycle by circulating refrigerant.
- the refrigerant circuit (30) includes a compressor (31), an outside heat exchanger (32), an expansion valve (33), an inside heat exchanger (51), and refrigerant piping connecting these.
- the compressor (31) is arranged in the lower part of the outer chamber (25).
- the outside heat exchanger (32) is arranged above the outside chamber (25).
- the outside heat exchanger (32) is a fin-and-tube heat exchanger that exchanges heat between refrigerant and outside air.
- the shape of the outside heat exchanger (32) is generally rectangular tubular.
- the internal heat exchanger (51) is arranged in the internal flow path (20).
- the indoor heat exchanger (51) is a fin-and-tube heat exchanger that exchanges heat between the refrigerant and the indoor air.
- the transportation refrigeration equipment (10) has one outside fan (34).
- the outside fan (34) is a propeller fan.
- the outdoor fan (34) is arranged in the outdoor chamber (25).
- the external fan (34) is arranged inside the cylindrical external heat exchanger (32).
- the outside fan (34) sends outside air to the outside heat exchanger (32).
- the transportation refrigeration equipment (10) is equipped with two internal fans (35).
- the internal fan (35) is a propeller fan.
- the internal fan (35) is arranged in the internal flow path (20).
- the internal fan (35) is arranged above the internal heat exchanger (51).
- the internal fan (35) sends internal air to the internal heat exchanger (51).
- the transportation refrigeration system (10) has a heater (52).
- the heater (52) is arranged below the internal heat exchanger (51).
- the heater (52) is used to melt frost adhering to the internal heat exchanger (51).
- the transport refrigeration system (10) has an electrical component box (36).
- the electrical component box (36) is arranged above the outer chamber (25). Electrical components such as an inverter board and a control board are housed inside the electrical component box (36).
- the refrigerant circuit (30) includes, as main components, a compressor (31), an external heat exchanger (32), and an expansion valve (33). , and an internal heat exchanger (51).
- the expansion valve (33) is an electronic expansion valve whose degree of opening is adjustable.
- the refrigerant circuit (30) has a discharge pipe (41) and a suction pipe (42). One end of the discharge pipe (41) is connected to the discharge portion of the compressor (31). The other end of the discharge pipe (41) is connected to the gas end of the outside heat exchanger (32). One end of the suction pipe (42) is connected to the suction portion of the compressor (31). The other end of the suction pipe (42) is connected to the gas end of the internal heat exchanger (51).
- the refrigerant circuit (30) includes a liquid pipe (43), a receiver (44), a cooling heat exchanger (45), a first on-off valve (46), a communication pipe (47), a second on-off valve (48), and an injection pipe. (49), and an injection valve (50).
- a receiver (44) is provided in the liquid pipe (43).
- the receiver (44) is a container that stores refrigerant.
- the cooling heat exchanger (45) has a first flow path (45a) and a second flow path (45b).
- the cooling heat exchanger (45) exchanges heat between the refrigerant in the first flow path (45a) and the refrigerant in the second flow path (45b).
- the cooling heat exchanger (45) is, for example, a plate heat exchanger.
- the first flow path (45a) is part of the liquid pipe (43).
- the second flow path (45b) is part of the injection pipe (49).
- the cooling heat exchanger (45) cools the refrigerant flowing through the liquid pipe (43).
- the first on-off valve (46) is provided in a portion of the liquid pipe (43) between the receiver (44) and the first flow path (45a).
- the first on-off valve (46) is an openable/closable electromagnetic valve.
- the communication pipe (47) communicates the high pressure line and the low pressure line of the refrigerant circuit (30). One end of the communication pipe (47) is connected to the discharge pipe (41). The other end of the communication pipe (47) is connected to a portion of the liquid pipe (43) between the expansion valve (33) and the internal heat exchanger (51).
- the second on-off valve (48) is provided on the communicating pipe (47).
- the second on-off valve (48) is an electromagnetic valve that can be opened and closed.
- the injection pipe (49) introduces refrigerant into the intermediate pressure section of the compressor (31).
- One end of the injection pipe (49) is connected to a portion of the liquid pipe (43) between the receiver (44) and the first flow path (45a).
- the other end of the injection pipe (49) is connected to the intermediate pressure section of the compressor (31).
- the intermediate pressure which is the pressure of the intermediate pressure section, is higher than the suction pressure of the compressor (31) and lower than its discharge pressure.
- the injection valve (50) is provided in a portion of the injection pipe (49) on the upstream side of the second flow path (45b).
- the injection valve (50) is an electronic expansion valve whose degree of opening is adjustable.
- the transportation refrigeration system (10) comprises a first control unit (90).
- the first control unit (90) includes a display section (91), an operation section (92), and a first control section (93).
- the display section (91) is composed of, for example, a liquid crystal panel.
- the display section (91) displays information regarding the operation of the transportation refrigeration system (10) and the air conditioner (100).
- the operation unit (92) is composed of operation buttons.
- the operation section (92) may be a touch panel that doubles as a liquid crystal panel as the display section (91).
- a person operates the transportation refrigeration system (10) using the operation unit (92).
- a person sets the operating conditions of the transport refrigeration system (10) using the operation unit (92).
- the first control unit (93) includes an MCU (Micro Control Unit, microcontroller unit), electric circuits, and electronic circuits.
- the MCU includes a CPU (Central Processing Unit), memory, and a communication interface. Various programs for the CPU to execute are stored in the memory.
- the first control section (93) controls the outside fan (34), the inside fan (35), the heater (52), and the refrigerant circuit (30). Specifically, the first control section (93) controls the outside fan (34), the inside fan (35), the heater (52), and the compressor (31). The first control section (93) controls the rotation speed of the outside fan (34), the rotation speed of the inside fan (35), and the rotation speed (operating frequency) of the compressor (31). The first control section (93) controls opening degrees of the expansion valve (33), the first on-off valve (46), the second on-off valve (48), and the injection valve (50).
- the basic operation behavior of the refrigeration equipment for transportation (10) will be described.
- the first control section (93) operates the compressor (31), the outside fan (34), and the inside fan (35).
- the first control section (93) opens the first on-off valve (46) and closes the second on-off valve (48).
- the first control section (93) adjusts the degree of opening of the expansion valve (33).
- a first control section (93) adjusts the opening of the injection valve (50).
- the refrigerant compressed by the compressor (31) flows through the outside heat exchanger (32).
- the refrigerant radiates heat to the outside air and condenses.
- the condensed refrigerant passes through the receiver (44).
- Part of the refrigerant that has passed through the receiver (44) flows through the first flow path (45a) of the cooling heat exchanger (45).
- the remainder of the refrigerant that has passed through the receiver (44) flows through the injection pipe (49) and is reduced to intermediate pressure at the injection valve (50).
- the depressurized refrigerant is introduced into the intermediate pressure section of the compressor (31).
- the refrigerant in the second flow path (45b) absorbs heat from the refrigerant in the first flow path (45a) and evaporates. This cools the coolant in the first flow path (45a). In other words, the degree of supercooling of the refrigerant flowing through the first flow path (45a) increases.
- the refrigerant cooled by the cooling heat exchanger (45) is decompressed to a low pressure by the expansion valve (33).
- the depressurized refrigerant flows through the internal heat exchanger (51).
- the indoor heat exchanger (51) the refrigerant absorbs heat from the indoor air and evaporates.
- the indoor heat exchanger (51) cools the indoor air.
- the evaporated refrigerant is sucked into the compressor (31) and compressed again.
- the air inside the container body (2) circulates through the storage space (5) and the inside channel (20).
- the in-chamber air is cooled by the in-chamber heat exchanger (51).
- the inside air of the storage space (5) can be cooled, and the inside air can be adjusted to a predetermined temperature.
- Air conditioner The transport refrigeration system (10) of the present embodiment includes an air conditioner (100).
- the air conditioner (100) is provided in the transportation refrigeration equipment (10) for so-called CA (Controlled Atmosphere) transportation.
- CA Controlled Atmosphere
- the air conditioner (100) regulates the composition of the air in the storage space (5) of the shipping container (1) to be different from the composition of the atmosphere.
- the air conditioner (100) has an air flow path (A) into which air to be treated is introduced.
- the air to be treated includes outside air and inside air.
- the air flow path (A) may be composed of a hard pipe, a flexible hose, or a combination of a pipe and a hose.
- An air pump (110), a gas separation module (120), and a sensor unit (140) are provided in the air flow path (A).
- the air pump (110) conveys air in the air flow path (A).
- a gas separation module (120) regulates the composition of the air.
- a gas separation module (120) separates the air to be treated into primary air and secondary air.
- a sensor unit (140) measures the composition of the air.
- Air flow path (A) includes an inflow flow path (101), an air supply flow path (102), an exhaust flow path (103), an internal exhaust flow path (104), a bypass flow path (105 ), and a sensor channel (106).
- the inflow channel (101) is a channel for sending the air to be treated to the gas separation module (120).
- the inflow channel (101) includes a first inflow channel (101a), a second inflow channel (101b), and an inflow main channel (101c).
- the first inflow path (101a) is a flow path for introducing outside air into the air flow path (A).
- the inlet end of the first inflow path (101a) opens to the outside space (6).
- a first air filter (F1) is provided in the first inflow path (101a).
- the first air filter (F1) captures dust, salt, and the like contained in outside air.
- the first air filter (F1) is composed of, for example, a membrane filter.
- the second inflow path (101b) is a flow path for introducing internal air into the air flow path (A).
- the inlet end of the second inflow path (101b) opens into the storage space (5).
- a second air filter (F2) is provided in the second inflow path (101b).
- the second air filter (F2) captures dust and the like contained in the air inside the refrigerator.
- the second air filter (F2) is composed of, for example, a membrane filter.
- a first water separator (111) is provided in the second inflow passage (101b).
- the outlet end of the first inflow channel (101a) and the outlet end of the second inflow channel (101b) are connected to the inlet end of the inflow trunk (101c).
- the outlet end of the inlet conduit (101c) is connected to the first inlet port (I1) of the gas separation module (120).
- the inflow trunk (101c) is provided with an air pump (110), a condensation circuit (112), a second water separator (113), and a water separation module (130) from the upstream side to the downstream side of the air flow. be done.
- the air supply channel (102) is a channel for sending the air separated by the gas separation module (120) to the storage space (5).
- the air supply channel (102) includes a first air supply channel (102a), a second air supply channel (102b), and an air supply trunk (102c).
- the first air supply path (102a) is a flow path for sending the first air separated by the gas separation module (120) to the storage space (5).
- the inlet end of the first air supply line (102a) is connected to the first outlet port (O1) of the gas separation module (120).
- the second air supply path (102b) is a flow path for sending the second air separated by the gas separation module (120) to the storage space (5).
- the inlet end of the second air supply line (102b) is connected to the second outlet port (O2) of the gas separation module (120).
- the outlet end of the first air supply passage (102a) and the outlet end of the second air supply passage (102b) are connected to the inlet end of the air supply trunk (102c).
- the outlet end of the air supply trunk (102c) opens into the storage space (5). Strictly speaking, the outlet end of the air supply trunk (102c) opens into the flow path downstream of the internal fan (35) in the internal flow path (20) of the transportation refrigeration equipment (10).
- the exhaust channel (103) is a channel for discharging the air separated by the gas separation module (120) to the outside space (6).
- This air includes one or both of primary air and secondary air.
- the exhaust passageway (103) includes a first exhaust passageway (103a), a second exhaust passageway (103b), and an exhaust trunk passageway (103c).
- the first exhaust path (103a) is a flow path for discharging the first air to the outside space (6).
- the inlet end of the first exhaust channel (103a) is connected to the first air supply channel (102a).
- the second exhaust path (103b) is a flow path for discharging the second air to the outside space (6).
- the inlet end of the second exhaust path (103b) connects to the second air supply path (102b).
- the outlet end of the first exhaust passage (103a) and the outlet end of the second exhaust passage (103b) are connected to the inlet end of the exhaust trunk (103c).
- the exit end of the exhaust trunk (103c) opens to the outside space (6).
- the inside exhaust path (104) is a flow path for discharging the air in the storage space (5) to the outside space (6).
- the inlet end of the inside exhaust channel (104) is connected to the middle part of the second inflow channel (101b). Strictly speaking, the inlet end of the inside exhaust passage (104) is connected to the first switching valve (151). The exit end of the inside exhaust passage (104) opens to the outside space (6).
- the bypass channel (105) is connected to the inlet trunk (101c) so that the air bypasses the gas separation module (120).
- the inlet end of the bypass channel (105) connects to the inflow trunk (101c). Strictly speaking, the inlet end of the bypass flow path (105) is connected to the second switching valve (152).
- the outlet end of the bypass channel (105) is connected to the first air supply channel (102a).
- the sensor channel (106) is a channel for sending air to the sensor unit (140).
- the sensor channel (106) includes a first sensor channel (106a) and a second sensor channel (106b).
- the inlet end of the first sensor channel (106a) connects to the first air supply channel (102a).
- the outlet end of the first sensor path (106a) connects to the sensor unit (140).
- the inlet end of the second sensor path (106b) connects to the sensor unit (140).
- the exit end of the second sensor channel (106b) opens into the storage space (5). Strictly speaking, the outlet end of the second sensor path (106b) opens into the flow path upstream of the internal fan (35) in the internal flow path (20) of the transportation refrigeration apparatus (10).
- the air pump (110) is an example of an air conveying section.
- the air pump (110) has a suction port and a discharge port.
- the air pump (110) pressurizes the air sucked through the suction port and discharges the pressurized air through the discharge port.
- the air pump (110) is an example of a pressurizing section that pressurizes the air supplied to the gas separation membrane (124).
- the gas separation module (120) separates the air to be treated into first air and second air having different compositions.
- the gas separation module (120) includes a first case (121), a first partition (122), a second partition (123), and a plurality of gas separation membranes (124).
- the first partition (122) and the second partition (123) are arranged inside the first case (121).
- a plurality of gas separation membranes (124) are disposed between the first partition (122) and the second partition (123).
- the first case (121) is a cylindrical container with both ends closed.
- the first case (121) extends in its axial direction.
- a first inlet port (I1) is connected to one axial end of the first case (121).
- a first outlet port (O1) is connected to the other axial end of the first case (121).
- a second outlet port (O2) is connected to the peripheral wall of the first case (121).
- the first partition (122) is arranged near one end of the first case (121).
- the second partition (123) is arranged near the other end of the first case (121).
- the first partition (122) and the second partition (123) are partition members for partitioning the inner space of the first case (121) in the axial direction.
- the first partition (122) and the second partition (123) are provided across the first case (121).
- a first lead-in chamber (125), a first lead-out chamber (126), and a second lead-out chamber (127) are formed inside the first case (121).
- the first introduction chamber (125) is formed between one end of the first case (121) and the first partition (122).
- the first lead-out chamber (126) is formed between the other end of the first case (121) and the second partition (123).
- the second lead-out chamber (127) includes a plurality of gas separation membranes ( 124).
- the gas separation membrane (124) is composed of a resin hollow fiber membrane.
- the gas separation membrane (124) is shaped like a hollow fiber or an elongated tube.
- the outer diameter of one gas separation membrane (124) is 1 mm or less.
- the gas separation membranes (124) have substantially the same thickness.
- Each gas separation membrane (124) extends in the axial direction of the first case (121) across the first partition (122) and the second partition (123).
- One end (inlet end) of the gas separation membrane (124) penetrates the first partition (122) and opens into the first introduction chamber (125).
- the other end (outlet end) of the gas separation membrane (124) penetrates the second partition (123) and opens into the first outlet chamber (126).
- the first introduction chamber (125) and the first discharge chamber (126) communicate with each other through the gas separation membrane (124).
- the second outlet chamber (127) does not substantially communicate with the interiors of the first inlet chamber (125), the first outlet chamber (126), and the gas separation membrane (124).
- the gas separation membrane (124) is a polymeric non-porous membrane.
- the gas separation membrane (124) separates the components contained in the mixed gas by utilizing the fact that the speed of molecules permeating through the gas separation membrane (124) differs for each substance.
- the gas separation membrane (124) has a characteristic that the nitrogen permeation rate is lower than both the oxygen permeation rate and the carbon dioxide permeation rate. In other words, the gas separation membrane (124) has a characteristic that the nitrogen permeability is lower than both the oxygen permeability and the carbon dioxide permeability.
- the gas separation membrane (124) has a nitrogen permeability lower than that of oxygen and carbon dioxide. In other words, nitrogen in the air is less permeable through the gas separation membrane (124) than oxygen and carbon dioxide. Therefore, as the air flowing inside the gas separation membrane (124) approaches the first outlet chamber (126), its nitrogen concentration increases, and simultaneously its oxygen concentration and carbon dioxide concentration decrease. Oxygen and carbon dioxide contained in the air flowing through the gas separation membrane (124) pass through the gas separation membrane (124) and move to the second outlet chamber (127).
- the concentration of nitrogen in the air flowing out to the first lead-out chamber (126) is higher than the concentration of nitrogen in the air in the first introduction chamber (125).
- the concentrations of oxygen and carbon dioxide in the air that flowed out to the first lead-out chamber (126) are lower than the concentrations of oxygen and carbon dioxide in the air in the first introduction chamber (125).
- the air in the first outlet chamber (126) is primary air. The first air flows out to the first air supply passage (102a) through the first outlet port (O1).
- the nitrogen concentration in the air flowing out to the second lead-out chamber (127) is lower than the nitrogen concentration in the air in the first introduction chamber (125).
- the concentrations of oxygen and carbon dioxide in the air that flowed out to the second lead-out chamber (127) are higher than the concentrations of oxygen and carbon dioxide in the air in the first lead-in chamber (125).
- the air in the second outlet chamber (127) is secondary air. The second air flows out to the second air supply passage (102b) through the second outlet port (O2).
- the first water separator (111) is located downstream of the second air filter (F2) in the second inflow passage (101b). be provided.
- the first water separator (111) removes liquid water contained in the air.
- the first water separator (111) is a cyclone gas-liquid separator that removes liquid water contained in the air by centrifugal force.
- the first water separator (111) is an example of a dehumidification section that reduces moisture in the air supplied to the gas separation membrane (124).
- the condensation circuit (112) is arranged in the inflow trunk (101c) between the air pump (110) and the second water separator (113).
- the condensation circuit (112) is composed of heat transfer tubes arranged in the internal space (5). When the air flows through the condensation circuit (112), the air is cooled by the inside air. As a result, moisture in the air in the condensation circuit (112) is condensed to produce condensed water.
- the second water separator (113) is arranged between the condensation circuit (112) and the water separation module (130) in the inflow trunk (101c).
- the second water separator (113) removes moisture contained in the air.
- the second water separator (113) is a cyclone gas-liquid separator that removes liquid water contained in the air by centrifugal force.
- the second water separator (113) is an example of a dehumidification section that reduces moisture in the air supplied to the gas separation membrane (124).
- the water separation module (130) is arranged upstream of the gas separation membrane (124) in the inflow trunk (101c).
- the water separation module (130) removes water contained in the air. Strictly speaking, the water separation module (130) separates water molecules contained in the air.
- the water separation module (130) of this example is a membrane dryer made of Sunsep (registered trademark).
- the water separation module (130) includes a second case (131), a third partition (132), a fourth partition (133), and a plurality of water separation membranes (134).
- the third partition (132) and the fourth partition (133) are arranged inside the second case (131).
- a plurality of water separation membranes (134) are arranged between the third partition (132) and the fourth partition (133).
- the second case (131) is a cylindrical container with both ends closed.
- the second case (131) extends in its axial direction.
- a second inlet port (I2) is connected to one axial end of the second case (131).
- a third outlet port (O3) is connected to the other axial end of the second case (131).
- a third inlet port (I3) and a fourth outlet port (O4) are connected to the peripheral wall of the second case (131).
- the third inlet port (I3) is located near the other end of the second case (131) in the peripheral wall of the second case (131).
- the fourth outlet port (O4) is located near one end of the second case (131) in the peripheral wall of the second case (131).
- the second inlet port (I2) is connected to the upstream channel of the water separation module (130) in the inflow trunk (101c).
- the third outlet port (O3) is connected to the upstream channel of the gas separation module (120) in the inflow trunk (101c).
- the air channel (A) has an introduction channel (107) and a water supply channel (108).
- the inlet (107) and water supply (108) connect to the water separation module (130).
- the introduction channel (107) is a channel for supplying relatively low-humidity air to the water separation module (130).
- the inlet end of the introduction path (107) connects to the air supply trunk (102c).
- the outlet end of the inlet channel (107) connects to the third inlet port (I3) of the water separation module (130).
- the water supply channel (108) is a channel for sending air containing water separated by the water separation module (130) to the storage space (5).
- the inlet end of the water supply channel (108) connects to the fourth outlet port (O4) of the water separation module (130).
- the outlet end of the water supply channel (108) is connected downstream of the inlet end of the introduction channel (107) in the air supply trunk (102c). Strictly speaking, the outlet end of the water supply path (108) is connected downstream of the fifth switching valve (155).
- a second introduction chamber (135), a third discharge chamber (136), and a fourth discharge chamber (137) are formed inside the second case (131).
- the second introduction chamber (135) is formed between one end of the second case (131) and the third partition (132).
- the third lead-out chamber (136) is formed between the other end of the second case (131) and the fourth partition (133).
- the fourth lead-out chamber (137) includes a plurality of water separation membranes ( 134).
- Each water separation membrane (134) extends in the axial direction of the second case (131) across the third partition (132) and the fourth partition (133).
- One end (inlet end) of the water separation membrane (134) penetrates the third partition (132) and opens into the second introduction chamber (135).
- the other end (outlet end) of the water separation membrane (134) penetrates the fourth partition (133) and opens into the third lead-out chamber (136).
- the second inlet chamber (135) and the third outlet chamber (136) communicate with each other via the water separation membrane (134).
- the fourth outlet chamber (137) does not substantially communicate with the second inlet chamber (135), the third outlet chamber (136), and the interior of the water separation membrane (134).
- the water separation membrane (134) is composed of a resin hollow fiber membrane. In other words, the water separation membrane (134) is shaped like a hollow fiber or an elongated tube.
- the water separation membrane (134) is made of a fluorinated ion exchange resin.
- the water separation membrane (134) has a property of permeating water molecules in the air.
- a water separation module (130) having a water separation membrane (134) is an example of a dehumidifying section that reduces moisture in the air supplied to the gas separation membrane (124).
- Water molecules in the air inside the water separation membrane (134) permeate the water separation membrane (134) and move to the fourth outlet chamber (137). As a result, the water molecules that permeate the water separation membrane (134) are added to the air flowing through the fourth outlet chamber (137).
- the air inside the water separation membrane (134) is dehumidified by losing water molecules and flows out to the third outlet chamber (136). Air in the third outlet chamber (136) exits through the third outlet port (O3) into the inlet conduit (101c) and is supplied to the gas separation module (120).
- the air humidified in the fourth outlet chamber (137) flows out to the water supply path (108) through the fourth outlet port (O4).
- the air in the water supply channel (108) flows out to the air supply trunk channel (102c) and is sent to the storage space (5).
- the sensor unit (140) includes an oxygen sensor (141), a carbon dioxide sensor (142), and a sensor case (143).
- the oxygen sensor (141) is a zirconia current type sensor that measures the oxygen concentration of mixed gases such as air.
- the carbon dioxide sensor (142) is a non-dispersive infrared (NDIR) type sensor that measures the concentration of carbon dioxide in a mixed gas such as air.
- the oxygen sensor (141) and the carbon dioxide sensor (142) are housed in the sensor case (143).
- the sensor case (143) is a box-shaped member.
- the sensor case (143) has a third air filter (F3).
- the third air filter (F3) is a membrane filter for capturing dust and the like contained in the inside air.
- the third air filter (F3) filters the indoor air flowing into the sensor case (143).
- the air channel (A) is provided with a channel switching mechanism for changing the air flow.
- the channel switching mechanism includes a first switching valve (151), a second switching valve (152), a third switching valve (153), a fourth switching valve (154) and a fifth switching valve (155). These switching valves (151, 152, 153, 154, 155) are composed of three-way valves.
- the first switching valve (151) is provided at the connecting portion between the second inflow passage (101b) and the inside exhaust passage (104).
- the first switching valve (151) switches between a first state in which the internal air is supplied to the gas separation module (120) and a second state in which the internal air is discharged to the external space (6).
- the first switching valve (151) in the first state allows communication between the storage space (5) and the inflow trunk (101c) and isolates the storage space (5) from the outside space (6). do.
- the second switching valve (152) in the second state cuts off the storage space (5) and the inflow trunk (101c) and allows communication between the storage space (5) and the outside space (6).
- the second switching valve (152) is provided at the connecting portion between the inflow trunk (101c) and the bypass channel (105).
- the second switching valve (152) is provided upstream of the gas separation membrane (124) in the inflow trunk (101c).
- the second switching valve (152) has a first state in which the air in the inflow channel (101) is supplied to the gas separation module (120) and a state in which the air in the inflow channel (101) bypasses the gas separation module (120). and the second state to Specifically, the second switching valve (152) in the first state allows communication between the inflow trunk (101c) and the gas separation membrane (124), and the inflow trunk (101c) and the bypass channel (105). block the The second switching valve (152) in the second state shuts off the inflow trunk (101c) and the gas separation membrane (124) and allows communication between the inflow trunk (101c) and the bypass channel (105).
- the third switching valve (153) is provided at the connecting portion between the first air supply path (102a) and the first exhaust path (103a).
- the third switching valve (153) is provided in the first air supply path (102a) between the connecting portion of the sensor flow path (106) and the outlet end of the first air supply path (102a).
- the third switching valve (153) has a first state in which the air in the first air supply passage (102a) is supplied to the storage space (5), and a state in which the air in the first air supply passage (102a) is supplied to the outside space (6). ).
- the third switching valve (153) in the first state communicates the first air supply path (102a) with the storage space (5), and the first air supply path (102a) communicates with the first exhaust path. (103a) and cut off.
- the third switching valve (153) in the second state isolates the first air supply path (102a) from the storage space (5) and disconnects the first air supply path (102a) from the first exhaust path (103a). communicate.
- the fourth switching valve (154) is provided at the connecting portion between the second air supply path (102b) and the second exhaust path (103b). In other words, the fourth switching valve (154) is positioned in the second air supply line (102b) between the second outlet port (O2) of the gas separation module (120) and the outlet end of the second air supply line (102b). provided in between.
- the fourth switching valve (154) has a first state in which the air in the second air supply passage (102b) is supplied to the storage space (5), and a state in which the air in the second air supply passage (102b) is supplied to the outside space (6). ).
- the fourth switching valve (154) in the first state communicates the second air supply path (102b) with the storage space (5), and the second air supply path (102b) communicates with the second exhaust path (102b). (103b) and cut off.
- the fourth switching valve (154) in the second state isolates the second air supply path (102b) from the storage space (5) and disconnects the second air supply path (102b) from the second exhaust path (103b). communicate.
- the fifth switching valve (155) is provided at the connecting portion between the air supply trunk (102c) and the introduction passage (107). In other words, the fifth switching valve (155) is provided upstream of the water supply path (108) in the air supply trunk (102c).
- the fifth switching valve (155) is in a first state in which the air in the air supply channel (102) is supplied to the storage space (5) without passing through the water separation module (130), of air is supplied to the storage space (5) via the water separation module (130).
- the fifth switching valve (155) in the first state allows the air supply trunk (102c) and the introduction passage (107) to communicate, and the air supply trunk (102c) and the storage space (5) to communicate with each other.
- the The fifth switching valve (155) in the second state cuts off the air supply trunk (102c) and the introduction passage (107) and allows the air supply trunk (102c) to communicate with the storage space (5).
- the channel switching mechanism includes an air on-off valve (156) provided in the air channel (A).
- An air on/off valve (156) is provided in the first sensor path (106a).
- the air on/off valve (156) is composed of, for example, an electromagnetic valve, and opens and closes the sensor channel (106).
- the air flow path (A) is provided with a first check valve (157) and a second check valve (158).
- the first check valve (157) is provided in the first air supply path (102a). Specifically, the first check valve (157) connects the first outlet port (O1) of the gas separation module (120) and the bypass channel (105) in the first air supply path (102a). provided between The first check valve (157) allows air flow from the first outlet port (O1) of the gas separation module (120) to the outlet end of the first air supply line (102a) and vice versa. Prohibit air flow.
- the second check valve (158) is provided in the second air supply path (102b). Specifically, the second check valve (158) connects the second outlet port (O2) of the gas separation module (120) and the second exhaust line (103b) in the second air supply line (102b). provided between The second check valve (158) allows air flow from the second outlet port (O2) of the gas separation module (120) to the outlet end of the second air supply line (102b) and vice versa. Prohibit air flow.
- a first pressure sensor (161), a second pressure sensor (162), and a third pressure sensor (163) are provided in the air flow path (A). These pressure sensors (161, 162, 163) detect air pressure.
- the first pressure sensor (161) is provided downstream of the water separation module (130) in the inflow channel (101). Specifically, the first pressure sensor (161) is provided between the first outlet port (O1) of the water separation module (130) and the second switching valve (152) in the inflow trunk (101c). .
- a first pressure sensor (161) detects the pressure inside the water separation module (130). Specifically, the first pressure sensor (161) detects the internal pressure of the third lead-out chamber (136) or the water separation membrane (134).
- the second pressure sensor (162) is provided downstream of the gas separation module (120) in the first air supply path (102a). Specifically, the second pressure sensor (162) is positioned between the first outlet port (O1) of the gas separation module (120) and the third switching valve (153) in the first air supply line (102a). be provided.
- a second pressure sensor (162) detects the pressure inside the gas separation module (120). Specifically, the second pressure sensor (162) detects the pressure in the first outlet chamber (126) or the internal pressure of the gas separation membrane (124).
- the third pressure sensor (163) is provided downstream of the gas separation module (120) in the second air supply path (102b). Specifically, the third pressure sensor (163) is positioned between the second outlet port (O2) of the gas separation module (120) and the fourth switching valve (154) in the second air supply line (102b). be provided. A third pressure sensor (163) detects the pressure in the second outlet chamber (127) of the gas separation module (120).
- the air flow path (A) is provided with a first pressure control valve (171) and a second pressure control valve (172).
- These pressure control valves (171, 172) are an example of a pressure control section that controls air pressure.
- the first pressure control valve (171) is provided downstream of the water separation module (130) in the inflow channel (101). Specifically, the first pressure control valve (171) is provided between the first pressure sensor (161) and the second switching valve (152) in the inflow trunk (101c).
- the first pressure control valve (171) regulates the pressure inside the water separation module (130). Specifically, the first pressure control valve (171) regulates the pressure in the third outlet chamber (136) of the water separation module (130) or the internal pressure of the water separation membrane (134).
- the opening of the first pressure control valve (171) may be adjusted based on the pressure detected by the first pressure sensor (161). By adjusting the pressure inside the water separation module (130) with the first pressure control valve (171), the water separation module (130) can be dehumidified appropriately.
- the second pressure control valve (172) is provided downstream of the gas separation module (120) in the first air supply path (102a). Specifically, the second pressure control valve (172) is provided between the second pressure sensor (162) and the third switching valve (153) in the first air supply passage (102a).
- a second pressure control valve (172) regulates the pressure inside the gas separation module (120). Specifically, the second pressure control valve (172) regulates the pressure in the first outlet chamber (125) of the gas separation module (120) or the internal pressure of the gas separation membrane (124). For example, the opening of the second pressure control valve (172) may be adjusted based on the pressure detected by the second pressure sensor (162).
- the second pressure regulating valve (172) regulates the internal pressure of the gas separation module (120) so that separation in the gas separation module (120) can be properly performed.
- the air conditioner (100) includes a second control unit (190).
- the second control unit (190) is connected to the first control unit (90) via a communication line (W).
- the communication line (W) exchanges signals and information between the first control unit (90) and the second control unit (190).
- the communication line (W) is wired, but may be wireless.
- the second control unit (190) includes a second control section (191).
- the second control section (191) is an example of the control section of the present disclosure.
- the second control unit (191) includes an MCU (Micro Control Unit), electric circuits, and electronic circuits.
- the MCU includes a CPU (Central Processing Unit), memory, and a communication interface. Various programs for the CPU to execute are stored in the memory.
- the second control unit (191) receives signals detected by the first pressure sensor (161), the second pressure sensor (162), and the third pressure sensor (163).
- the second control section (191) controls the air pump (110), the channel switching mechanism, and the pressure control valves (171, 172). Specifically, the second control section (191) controls the operation of the air pump (110).
- a second control section (191) switches each switching valve (151, 152, 153, 154, 155) between a first state and a second state.
- the second control section (191) opens and closes the air on/off valve (156).
- the second control section (191) adjusts the opening degrees of the pressure control valves (171, 172).
- the operating behavior of the air conditioner (100) will be described.
- the operation of the air conditioner (100) includes first to fifth operations described below.
- the second control section (191) sets the fifth switching valve (155) to the first state. Therefore, in these operations, the water separation module (130) operates to remove moisture from the air.
- the second control section (191) switches the first switching valve (151) to the first state, the second switching valve (152) to the first state, and switches the third switching valve (152) to the first state.
- the valve (153) is set to the first state
- the fourth switching valve (154) is set to the second state
- the fifth switching valve (155) is set to the first state
- the air on/off valve (156) is set to the closed state.
- the indoor air flowing through the second inflow path (101b) flows through the first water separator (111).
- the first water separator (111) separates water (liquid) from the inside air.
- the air that has passed through the first water separator (111) and the outside air that flows through the first inflow path (101a) flow into the inflow path (101c) and are mixed together, and then pumped through an air pump (110) as air to be treated. ).
- the air pump (110) pressurizes and discharges the sucked air.
- the air discharged from the air pump (110) flows through the second water separator (113) after being cooled by the condensation circuit (112).
- the second water separator (113) separates water condensed from the air to be treated while the air to be treated passes through the condensing circuit (112).
- the air that has passed through the second water separator (113) is dehumidified by flowing through the water separation membrane (134) of the water separation module (130).
- the air to be treated that has been dehumidified in the water separation module (130) flows into the gas separation module (120).
- the air to be treated is separated into primary air and secondary air.
- the first air which has a lower oxygen concentration than the air to be treated, flows through the first air supply path (102a) and the introduction path (107) in order, and flows through the third outlet chamber (136) of the water separation module (130).
- the third outlet chamber (136) water molecules permeating the water separation membrane (134) are applied to the primary air.
- the primary air humidified by the water separation module (130) sequentially flows through the water supply channel (108) and the air supply main channel (102c), and is supplied to the internal space (5).
- the second air which has a higher oxygen concentration than the air to be treated, flows through the second air supply path (102b), the second exhaust path (103b), and the exhaust main path (103c) in order, and is discharged to the outside space (6). be done.
- the flow rate of the outside air flowing into the first inflow passage (101a) through the first air filter (F1) is higher than the flow rate of the second air discharged to the outside space (6).
- the air pressure in the storage space (5) is higher than the air pressure outside the shipping container (1) (ie atmospheric pressure).
- the storage space (5) is thereby kept at a positive pressure.
- Second operation In the second operation, the outside air is treated air, the first air is supplied to the inside space (5), and the second air is discharged to the outside space (6). It is driving to do. This second operation is performed to reduce the oxygen concentration of the air inside the storage space (5).
- the second control section (191) switches the first switching valve (151) to the second state, switches the second switching valve (152) to the first state, and switches the third switching valve (152) to the first state.
- the valve (153) is set to the first state
- the fourth switching valve (154) is set to the second state
- the fifth switching valve (155) is set to the first state
- the air on/off valve (156) is set to the closed state.
- outside air flowing through the first inflow path (101a) is pressurized by the air pump (110) and then passes through the condensation circuit (112) and the second water separator (113).
- the air that has passed through the second water separator (113) is dehumidified by flowing through the water separation membrane (134) of the water separation module (130).
- the air to be treated that has been dehumidified in the water separation module (130) flows into the gas separation module (120).
- the air to be treated is separated into primary air and secondary air.
- the first air, which has a lower oxygen concentration than the air to be treated, is humidified by the water separation module (130), then flows through the water supply channel (108) and the air supply trunk channel (102c) in order, and flows into the internal space (5). supplied to
- the second air which has a higher oxygen concentration than the air to be treated, flows through the second air supply path (102b), the second exhaust path (103b), and the exhaust main path (103c) in order, and is discharged to the outside space (6). be done.
- the storage space (5) is kept at positive pressure. Therefore, the air in the internal space (5) flows through the second inflow passage (101b) and the internal exhaust passage (104) and is discharged to the external space (6). As a result, the air in the storage space (5) is gradually replaced with the first air.
- the third operation is an operation in which both the outside air and the inside air are treated as the air to be treated, the first air is discharged outside the refrigerator, and the second air is supplied to the inside of the refrigerator. is. This third operation is performed to raise the oxygen concentration of the air inside the storage space (5).
- the second control section (191) switches the first switching valve (151) to the first state, switches the second switching valve (152) to the first state, and switches the third switching valve (152) to the first state.
- the valve (153) is set to the second state
- the fourth switching valve (154) is set to the first state
- the fifth switching valve (155) is set to the first state
- the air on/off valve (156) is set to the closed state.
- the air (to-be-treated air) mixed with the outside air flowing through the first inflow passage (101a) and the inside air flowing through the second inflow passage (101b) is pressurized by the air pump (110). After being filtered, it passes through a condensation circuit (112) and a second water separator (113). The air that has passed through the second water separator (113) is dehumidified by flowing through the water separation membrane (134) of the water separation module (130). The air to be treated that has been dehumidified in the water separation module (130) flows into the gas separation module (120). In the gas separation module (120), the air to be treated is separated into primary air and secondary air. The first air, which has a lower oxygen concentration than the air to be treated, flows through the first air supply passage (102a), the first exhaust passage (103a), and the exhaust passage (103c) in order, and is discharged to the outside space (6). be done.
- the second air which has a higher oxygen concentration than the air to be treated, flows through the second air supply path (102b) and the introduction path (107) in order, and flows through the third outlet chamber (136) of the water separation module (130).
- the third outlet chamber (136) water molecules permeating the water separation membrane (134) are added to the secondary air.
- the secondary air humidified by the water separation module (130) flows through the water supply path (108) and the air supply trunk (102c) in order, and is supplied to the internal space (5).
- the storage space (5) is kept at positive pressure.
- the fourth operation is an operation in which the air outside the refrigerator is treated as the air to be treated, the first air is discharged outside the refrigerator, and the second air is supplied into the refrigerator. This fourth operation is performed to raise the oxygen concentration of the air inside the storage space (5).
- the second control section (191) switches the first switching valve (151) to the second state, switches the second switching valve (152) to the first state, and switches the third switching valve (152) to the first state.
- the valve (153) is set to the second state
- the fourth switching valve (154) is set to the first state
- the fifth switching valve (155) is set to the first state
- the air on/off valve (156) is set to the closed state.
- outside air (air to be treated) flowing through the first inflow passage (101a) is pressurized by the air pump (110) and then passes through the condensation circuit (112) and the second water separator (113).
- the air that has passed through the second water separator (113) is dehumidified by flowing through the water separation membrane (134) of the water separation module (130).
- the air to be treated that has been dehumidified in the water separation module (130) flows into the gas separation module (120).
- the air to be treated is separated into primary air and secondary air.
- the second air, which has a higher oxygen concentration than the air to be treated is humidified by the water separation module (130), then flows through the water supply channel (108) and the air supply main channel (102c) in order, and flows into the internal space (5). supplied to
- the first air which has an oxygen concentration lower than that of the air to be treated, sequentially flows through the second air supply path (102b), the second exhaust path (103b), and the exhaust main path (103c), and is discharged to the outside space (6). be done.
- the storage space (5) is kept at positive pressure. Therefore, the air in the internal space (5) flows through the second inflow passage (101b) and the internal exhaust passage (104) and is discharged to the external space (6). As a result, the air in the storage space (5) is gradually replaced with the second air.
- the fifth operation is an operation in which outside air is supplied to the inside of the refrigerator as it is. This fifth operation is performed to raise the oxygen concentration of the air inside the storage space (5).
- the second control section (191) switches the first switching valve (151) to the second state, switches the second switching valve (152) to the second state, and switches the third switching valve (152) to the second state.
- the valve (153) is set to the first state
- the fourth switching valve (154) is set to the second state
- the fifth switching valve (155) is set to the first state
- the air on/off valve (156) is set to the closed state.
- outside air flowing through the first inflow path (101a) is pressurized by the air pump (110) and then passes through the condensation circuit (112) and the second water separator (113).
- the air that has passed through the second water separator (113) is dehumidified by flowing through the water separation membrane (134) of the water separation module (130).
- Air dehumidified in the water separation module (130) flows through the bypass channel (105) to bypass the gas separation module (120).
- the air flowing out of the bypass channel (105) sequentially flows through the first air supply channel (102a) and the introduction channel (107), and then flows through the third outlet chamber (136) of the water separation module (130).
- water molecules that permeate the water separation membrane (134) are added to the air.
- the air humidified by the water separation module (130) sequentially flows through the water supply path (108) and the air supply trunk (102c) and is supplied to the internal space (5).
- the storage space (5) is kept at positive pressure. Therefore, the air in the internal space (5) flows through the second inflow passage (101b) and the internal exhaust passage (104) and is discharged to the external space (6). As a result, the air in the storage space (5) is gradually replaced with the outside air.
- the air conditioner (100) of the present embodiment performs the first operation to solve the above problem.
- the second control section (191) performs a first operation of suppressing deterioration of the performance of the gas separation membrane (124) due to the suspension of the air conditioner (100) for a predetermined period of time.
- the first operation of this embodiment includes a preliminary operation of supplying the air to be treated to the gas separation membrane (124).
- the second control section (191) starts the preliminary operation after a predetermined period of time has passed since the air conditioner (100) stopped.
- step ST1 when the second control section (191) receives an operation command for normal operation, in step ST2, the second control section (191) controls the air conditioner (100) to perform normal operation.
- the normal operation is an operation in which the air to be treated is separated by the gas separation module (120), and includes the first operation, second operation, third operation and fourth operation described above. Normal operation aims at adjusting the composition of the air in the containment space (5).
- step ST3 when the second control section (191) receives a command to stop normal operation, in step ST4, the second control section (191) stops the air conditioner (100).
- step ST5 when the predetermined time T1 has passed since the operation of the air conditioner (100) stopped, in step ST6, the second control section (191) causes the preliminary operation to be performed.
- the operation here includes normal operation and preliminary operation.
- the predetermined time T1 is set in consideration of the deterioration of the performance of the gas separation membrane (124) due to stoppage of the air conditioner (100) or non-use of the gas separation membrane (124).
- the predetermined time T1 is set, for example, from several days to several tens of days.
- step ST7 when the conditions for stopping the preliminary operation are satisfied, in step ST8, the second control unit (191) stops the preliminary operation.
- the condition for stopping the preliminary operation in this example is that a predetermined time T2 has passed since the preliminary operation started.
- Preliminary operation is an operation to supply air to be treated to the gas separation membrane (124).
- the preliminary operation is an operation performed for the purpose of suppressing deterioration in the performance of the gas separation membrane (124) due to the suspension of the air conditioner (100) for a predetermined period. Therefore, the air conditioner (100) in preliminary operation may perform the same operations as in the first, second, third, and fourth operations described above.
- the preliminary operation of this embodiment differs from the above-described normal operation in that it is not executed by an operation command accompanying a human operation such as a user.
- the air to be treated flows through the gas separation module (120).
- the air to be treated that has flowed into the first introduction chamber (125) flows through each gas separation membrane (124).
- the gas separation membrane (124) expands, increasing the size of each pore. This recovers the oxygen and carbon dioxide separation performance of the gas separation membrane (124).
- the air pump (110) constitutes a pressurizing section that pressurizes the air supplied to the gas separation membrane (124). Specifically, the air pump (110) pressurizes the air to be treated so that the internal pressure of the gas separation membrane (124) in preliminary operation is equal to or higher than the internal pressure P1 of the gas separation membrane (124) in normal operation. . The air pump (110) pressurizes the air to be treated so that the internal pressure of the gas separation membrane (124) does not exceed its withstand pressure P2.
- the internal pressure of the gas separation membrane (124) can be adjusted by the second pressure control valve (172). Specifically, the second control section (191) controls the degree of opening of the second pressure control valve (172) so that the pressure detected by the second pressure sensor (162) is greater than or equal to P1 and less than P2.
- the internal pressure of the gas separation membrane (124) during preliminary operation is maintained at, for example, 700 [kPa].
- the gas separation membrane (124) is easily expanded, and the pore size is easily widened. As a result, the performance recovery effect of the gas separation membrane (124) is improved.
- the air conditioner (100) has a first water separation membrane (134), a second water separation membrane (134), and a water separation module (130) as a dehumidifier. These dehumidifiers reduce the moisture in the air supplied to the gas separation membrane (124). Here, when moisture in the air supplied to the gas separation membrane (124) adheres to the gas separation membrane (124), this moisture clogs the pores, thereby degrading the separation performance of the gas separation membrane (124). Sometimes I end up On the other hand, the first water separation membrane (134), the second water separation membrane (134), and the water separation module (130) dehumidify the air as the dehumidifying section, so that the moisture is removed from the gas separation membrane (124).
- the dehumidifying section may be one or two of the first water separator (111), the second water separator (113), and the water separation module (130), or other It may be a dehumidifying part of the system.
- the second control section (191) continues the preliminary operation for the predetermined time T2.
- the predetermined time T2 is set to 24 hours, for example.
- the pore size of the gas separation membrane (124) can be sufficiently widened.
- the air conditioner (100) of the above-described embodiment includes a second control unit ( 191). Therefore, even when the gas separation membrane (124) contracts and its performance deteriorates, the first operation can suppress the deterioration of the performance of the gas separation membrane (124).
- a first operation includes a preliminary operation in which air to be treated is supplied to the gas separation membrane (124).
- the gas separation membrane (124) can be expanded and its pore size can be enlarged. As a result, the performance of the gas separation membrane (124) can be easily and quickly recovered.
- the second control section (191) starts the preliminary operation when a predetermined time has elapsed since the air conditioner (100) stopped. Therefore, the performance of the gas separation membrane (124) can be reliably recovered at the timing when the performance of the gas separation membrane (124) is lowered due to the shutdown of the air conditioner (100).
- the air conditioner (100) has an air pump (110) that pressurizes the air supplied to the gas separation membrane (124) in preliminary operation. This makes it easier to expand the gas separation membrane (124), so that the performance of the gas separation membrane (124) can be quickly and reliably recovered.
- the air conditioner (100) includes a dehumidifying section (111, 113, 130) that reduces moisture in the air supplied to the gas separation membrane (124) in preliminary operation. This can prevent moisture from clogging the pores of the gas separation membrane (124), thereby suppressing deterioration of the performance of the gas separation membrane (124).
- the second control section (191) determines the start time of normal operation.
- the second control section (191) may estimate the start time of normal operation.
- the second control unit (191) estimates the start time of normal operation based on, for example, the transport route of the transport container (1). For example, by installing a GPS (Global Positioning System) in a shipping container (1) or a ship that transports the shipping container (1), the second control unit (191) can control the shipping container ( 1) You can get the transportation route.
- the second control unit (191) identifies, for example, the arrival of the shipping container (1) at the port based on GPS, and estimates the start time of normal operation in conjunction with this timing.
- the shipping container (1) arrives at the port the following perishables are transported to the container body (2), and it is necessary to cool the air in the storage space (5) and adjust the composition of this air. is.
- the normal operation start time may be an input value determined in advance by the user.
- the user determines the normal operation start time using the operation unit (92).
- the second control section (191) determines the time input via the operation section (92) as the normal operation start time.
- the second control section (191) determines the start time of the preliminary operation.
- the start time of the preliminary operation is the time obtained by subtracting the execution time of the preliminary operation (for example, T2 described above) from the start time of the normal operation.
- the second control section (191) causes the air conditioning device (100) to perform preliminary operation from the start time obtained at step ST12.
- the air to be treated is supplied to the gas separation membrane (124), similar to the embodiments described above. Therefore, the performance of the gas separation membrane (124) can be recovered.
- the second control section (191) executes normal operation in step ST14. Specifically, in normal operation, for example, the above-described first, second, third, or fourth operation is performed. Preliminary operation is performed immediately before normal operation to restore the performance of the gas separation membrane (124). Therefore, in normal operation, gas separation performance of the gas separation membrane (124) can be fully exhibited.
- preliminary operation and normal operation may be performed continuously.
- the preliminary operation preferably performs the same operation as the normal operation.
- the second control section (191) causes the air conditioner (100) to perform the first operation.
- the second control section (191) causes the air conditioner (100) to perform the first operation even in the preliminary operation to restore the performance of the gas separation membrane (124).
- the second control section (191) continuously executes the first operation as the normal operation after the execution time of the first operation as the preliminary operation has elapsed.
- the performance of the gas separation membrane (124) can be sufficiently obtained from the start time of normal operation without stopping the air conditioner (100).
- the air conditioner (100) according to Modification 2 includes a water separation module (130) according to the embodiment, an introduction passage (107), a water supply passage (108), and a fifth switching valve ( 155).
- the air conditioner (100) of Modification 2 performs the first operation, the second operation, the third operation, the fourth operation, and the fifth operation in the same manner as in the embodiment.
- the modification 2 differs from the embodiment in that the air in the air supply trunk (102c) is sent directly to the storage space (5) without passing through the introduction path (107) and the water supply path (108).
- the first air and the second air separated by the gas separation module (120) are discharged to the outside space (6).
- the exhaust channel (103) of Modification 2 discharges the first air and the second air separated by the gas separation membrane (124) to the outside space (6).
- the second control section (191) sets the third switching valve (153) to the second state and the fourth switching valve (154) to the second state.
- the second control section (191) sets, for example, the second switching valve (152) to the first state and the air on/off valve (156) to the closed state.
- the second control section (191) sets the first switching valve (151) to the first state.
- the second control section (191) may set the first switching valve (151) to the second state.
- the air dehumidified in the first water separator (111) is supplied to the gas separation membrane (124) of the gas separation module (120). This restores the performance of the gas separation membrane (124).
- the first air separated by the gas separation module (120) sequentially flows through the first air supply line (102a) and the first exhaust line (103a), and then flows out to the exhaust trunk line (103c).
- the second air separated by the gas separation module (120) sequentially flows through the second air supply line (102b) and the second exhaust line (103b), and then flows out to the exhaust trunk line (103c).
- the air merged in the exhaust trunk (103c) is discharged to the outside space (6).
- the air dehumidified in the second water separator (113) is also dehumidified in the gas separation module (120). It is fed to the gas separation membrane (124). This restores the performance of the gas separation membrane (124).
- the first air and the second air separated by the gas separation membrane (124) are discharged to the outside space (6) in the preliminary operation.
- the first air and the second air are not supplied to the storage space (5), which is the internal space. Therefore, it is possible to avoid a change in the composition of the air in the storage space (5) due to the execution of the preliminary operation.
- the second inflow path (101b) is omitted, the storage space (5) is not connected to the inflow path (101), and the storage space (5) is connected to the inside exhaust path. It may be connected to the outside space (6) via (104).
- an on-off valve is provided in the inside exhaust passage (104).
- the air conditioner (100) of Modification 3 is provided with a heating section (175) in the air flow path (A).
- the heating section (175) heats the air supplied to the gas separation membrane (124) in preliminary operation.
- the heating part (175) of this example is configured by an electric heater.
- the heating section (175) is provided in the inflow trunk (101c). Specifically, the heating section (175) is provided between the water separation module (130) and the gas separation module (120).
- the air to be treated heated to a predetermined temperature by the heating unit (175) is supplied to the gas separation membrane (124).
- the components in the air can improve the recovery performance of the gas separation membrane (124). This is attributed to the increase in the diffusion coefficient of gas in the gas separation membrane (124) as the air temperature rises and the decrease in relative humidity in the air as the air temperature rises. I can guess.
- the heating unit (175) may be a device that is provided in the refrigeration system (10) and heats air by exhaust heat.
- This equipment includes, for example, a compressor (31).
- the second control section (191) determines whether or not a first condition indicating that the performance of the gas separation membrane (124) is degraded is met.
- the first condition is that a predetermined period of time has passed since the air conditioner (100) stopped and that the gas separation membrane (124) has not been used for a predetermined period of time or longer. This is because when these conditions are satisfied, the pore size of the gas separation membrane (124) becomes small.
- step S22 the second control section (191) outputs a first signal for prompting the person to operate the air conditioner (100).
- the first signal output from the second control section (191) is input to the first control section (93) of the first control unit (90) via the communication line (W).
- the first control section (93) controls the display section (91) to prompt the user to operate the air conditioner (100).
- the first control section (93) which has received the first signal, controls the display section (91) so as to prompt the person to drive normally.
- the display section (91) is an example of a first notification section that informs the person that the operation of the air conditioner (100) is to be urged.
- the display section (91) prompts the user to operate the air conditioner (100) normally using characters, graphics, symbols, signs, or the like. A person who has confirmed the display (91) causes the air conditioner (100) to operate normally by operating the operation section (92).
- the first operation, second operation, third operation, or fourth operation is performed.
- the fifth operation may be performed.
- an operation similar to the preliminary operation described in modification 2 may be performed.
- an operation similar to the preliminary operation described in modification 3 may be performed.
- the first reporting unit may be a light-emitting unit such as an LED that uses light to prompt normal operation of the air conditioner (100).
- the first notification section may be a sound generation section that prompts the normal operation of the air conditioner (100) with a sound such as voice.
- the first notification section such as the display section (91) may be provided in the second control unit (190).
- the display section (91) of the air conditioner (100) prompts the user to operate the air conditioner (100) normally.
- the second control section (191) of Modification 5 outputs information about the performance of the gas separation membrane (124). Control regarding this operation will be described in detail with reference to FIG.
- the control according to FIG. 19 is added to the air conditioner (100) of the embodiment described above.
- the air conditioner (100) of Modification 5 performs an operation (second operation) of outputting information about the performance of the gas separation membrane (124) in addition to the first operation.
- the second control section (191) causes the air conditioner (100) to perform preliminary operation.
- the second control section (191) estimates information about the performance of the gas separation membrane (124). Specifically, the second control section (191) estimates the time until the performance of the gas separation membrane (124) recovers.
- the second control unit (191) stores data indicating the relationship between the speed change of the internal pressure of the gas separation membrane (124) and the elapsed time of the preliminary operation. While the pore diameter of the gas separation membrane (124) is small immediately after the start of the preliminary operation, the pore diameter gradually increases as the preliminary operation is performed. As the preliminary operation progresses, the pores become sufficiently large, and the rate of change in the diameter of the pores becomes small. Therefore, the amount of decrease in the internal pressure of the gas separation membrane (124) is relatively large immediately after the start of the preliminary operation, and then gradually decreases. That is, immediately after the start of the preliminary operation, the rate of decrease of the internal pressure of the gas separation membrane (124) is relatively high, and then the rate of decrease gradually decreases. Therefore, if the rate of decrease of the internal pressure of the gas separation membrane (124) at a certain timing is known, it is possible to estimate how long it will take for the performance of the gas separation membrane (124) to recover.
- step ST32 the second control section (191) obtains the decrease speed of the pressure detection value of the second pressure sensor (162) at a predetermined timing after starting the preliminary operation.
- the second control section (191) estimates the time or time until the performance of the gas separation membrane (124) recovers based on this rate of decrease and the above data.
- step ST32 when obtaining the rate of decrease of the internal pressure of the gas separation membrane (124), basically, the second control section (191) adjusts the degree of opening of the second pressure control valve (172). not performed.
- step S33 the second control unit (191) outputs information about the estimated time and time as information about the performance of the gas separation membrane (124).
- the second control section (191) outputs this information to the first control section (93) of the first control unit (90).
- the first control section (93) having received this information controls the display section (91) so as to inform people of this time.
- the display section (91) is an example of a second notification section that informs a person of information regarding the performance of the gas separation membrane (124).
- step S34 the display section (91) displays the time and time until the performance of the gas separation membrane (124) recovers, using characters, graphics, symbols, signs, and the like. In this way, a person can know the time and time until the performance of the gas separation membrane (124) recovers through the display section (91). Therefore, the reliability of the air conditioner (100) can be ensured.
- the second reporting unit may be a light emitting unit that uses light to notify people of information about the performance of the gas separation membrane (124).
- the second notification part may be a sound generation part that notifies a person of information regarding the performance of the gas separation membrane (124) by means of sound such as voice.
- a second notification section such as the display section (91) may be provided in the second control unit (190).
- the display section (91) of the air conditioner (100) informs the person of information regarding the performance of the gas separation membrane (124).
- the information about the performance of the gas separation membrane (124) is the time and time until the performance of the gas separation membrane (124) recovers, but this information is the performance of the gas separation membrane (124) itself. It may be the degree of deterioration of the performance of the gas separation membrane (124).
- Modification 6 The fifth switching valve (155) according to the embodiment is omitted from the air conditioner (100) of Modified Example 6 shown in FIG.
- the air supplied into the storage always flows through the introduction channel (107) and the water supply channel (108) and is sent to the storage space (5).
- the introduction passageway (107) and the water supply passageway (108) form part of the air supply trunk passageway (102c).
- Reference Example The air conditioner (100) of Reference Example does not perform the first operation according to the embodiment and Modifications 1-4. In other words, the air conditioner (100) of the reference example does not perform an operation to suppress deterioration of the performance of the gas separation membrane (124) due to the suspension of the air conditioner (100) for a predetermined period.
- the air conditioner (100) of the reference example performs the second action according to the fifth modification. This allows a person to know information about the performance of the gas separation membrane (124). Therefore, the reliability of the air conditioner (100) can be ensured.
- the pressurizing section may be other than the air pump (110), and may be a compressor that compresses air or a fan that conveys air.
- the fifth switching valve (155) may be omitted.
- the air conditioner (100), transport refrigeration system (10), or transport container may have a rechargeable auxiliary power source such as a battery.
- the auxiliary power supply is configured to be able to supply power to the air conditioner. Electric power can be supplied from the auxiliary power source to the air conditioner (100) even when the air conditioner (100) is powered off and the air conditioner (100) is stopped. As a result, even when the air conditioner (100) is in a stopped state, the air conditioner (100) can reliably perform the preliminary operation.
- the shipping container (1) may be used for land transportation.
- the shipping container (1) is transported by land transport such as a vehicle.
- the shipping container (1) is loaded onto a trailer.
- the air conditioner (100) may be used in stationary warehouses to adjust the composition of the air inside the warehouse.
- the air conditioner (100) may be provided in a warehouse for storing perishables such as fruits, vegetables, and flowers.
- a storage space (5) is formed as an internal space for storing objects to be stored in the warehouse.
- the present disclosure is useful for air conditioners, refrigerators, and shipping containers.
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Abstract
Description
被処理空気が供給されるガス分離膜(124)と、前記空気調節装置の所定期間の停止に伴う前記ガス分離膜(124)の性能の低下を抑制する第1動作を実行させる制御部(191)とを備えている空気調節装置である。
本開示は、輸送用コンテナ(1)である。輸送用コンテナ(1)は、庫内の温度管理が可能なリーファーコンテナ(reefer container)である。輸送用コンテナ(1)は、果物、野菜、花卉などの生鮮物を輸送するために用いられる。生鮮物は、空気中の酸素(O2)を取り込んで二酸化炭素(CO2)を放出する。
コンテナ本体(2)は、生鮮物を収容する収納庫である。
輸送用冷凍装置(10)は、コンテナ本体(2)の開口に取り付けられる。輸送用冷凍装置(10)は、ケーシング(11)と冷媒回路(30)とを備える。輸送用冷凍装置(10)は、収納空間(5)の空気(庫内空気)の温度を調節する。
図2に示すように、ケーシング(11)は、隔壁(12)と仕切板(15)とを備える。
冷媒回路(30)は、それに充填された冷媒を有する。冷媒回路(30)は、冷媒が循環することで蒸気圧縮式の冷凍サイクルを行う。冷媒回路(30)は、圧縮機(31)、庫外熱交換器(32)、膨張弁(33)、庫内熱交換器(51)、及びこれらを接続する冷媒配管を含む。
輸送用冷凍装置(10)は、1つの庫外ファン(34)を備える。庫外ファン(34)は、プロペラファンである。庫外ファン(34)は、庫外室(25)に配置される。庫外ファン(34)は、筒状に形成された庫外熱交換器(32)の内側に配置される。庫外ファン(34)は、庫外熱交換器(32)へ庫外空気を送る。
輸送用冷凍装置(10)は、ヒータ(52)を備える。ヒータ(52)は、庫内熱交換器(51)の下方に配置される。ヒータ(52)は、庫内熱交換器(51)に付着した霜を融かすために用いられる。
図1に示すように、輸送用冷凍装置(10)は、電装品箱(36)を有する。電装品箱(36)は、庫外室(25)の上部に配置される。電装品箱(36)の内部には、インバータ基板及び制御基板等の電気部品が収容される。
図3に示すように、冷媒回路(30)は、主要部品として、圧縮機(31)と、庫外熱交換器(32)と、膨張弁(33)と、庫内熱交換器(51)とを有する。膨張弁(33)は、その開度が調節可能な電子膨張弁である。
図4に示すように、輸送用冷凍装置(10)は、第1制御ユニット(90)を備える。第1制御ユニット(90)は、表示部(91)と、操作部(92)と、第1制御部(93)とを含む。
輸送用冷凍装置(10)の基本的な運転動作について説明する。輸送用冷凍装置(10)の運転時には、第1制御部(93)が、圧縮機(31)、庫外ファン(34)、および庫内ファン(35)を運転させる。第1制御部(93)が第1開閉弁(46)を開け、第2開閉弁(48)を閉じる。第1制御部(93)が、膨張弁(33)の開度を調節する。第1制御部(93)が、インジェクション弁(50)の開度を調節する。
本実施形態の輸送用冷凍装置(10)は、空気調節装置(100)を備える。
空気流路(A)は、流入流路(101)、給気流路(102)、排気流路(103)、庫内側排気路(104)、バイパス流路(105)、およびセンサ流路(106)を含む。
エアポンプ(110)は、空気搬送部の一例である。エアポンプ(110)は、吸込口と吐出口とを有する。エアポンプ(110)は、吸込口から吸い込んだ空気を加圧し、加圧した空気を吐出口から吐出する。エアポンプ(110)は、ガス分離膜(124)に供給される空気を加圧する加圧部の一例である。
ガス分離モジュール(120)は、被処理空気を互いに組成が異なる第1空気と第2空気とに分離する。図6に示すように、ガス分離モジュール(120)は、第1ケース(121)と、第1隔壁部(122)と、第2隔壁部(123)と、複数のガス分離膜(124)とを有する。第1隔壁部(122)および第2隔壁部(123)は、第1ケース(121)の内部に配置される。複数のガス分離膜(124)は、第1隔壁部(122)と第2隔壁部(123)との間に配置される。
流入流路(101)の被処理空気は、第1入口ポート(I1)を介して第1導入室(125)へ流入する。第1導入室(125)の空気は、各ガス分離膜(124)の内部を第1導出室(126)へ向かって流れる。ガス分離膜(124)の内部の空気は、その一部がガス分離膜(124)を透過して第2導出室(127)へ移動し、その残部が第1導出室(126)へ流出する。
第1水分離器(111)は、第2流入路(101b)のうち第2エアフィルタ(F2)の下流側に設けられる。第1水分離器(111)は、空気中に含まれる液状態の水を除去する。厳密には、第1水分離器(111)は、空気中に含まれる液状態の水を遠心力によって除去する、サイクロン式の気液分離器である。第1水分離器(111)は、ガス分離膜(124)に供給される空気中の水分を減らす減湿部の一例である。
水分離モジュール(130)は、流入幹路(101c)におけるガス分離膜(124)の上流側に配置される。水分離モジュール(130)は、空気中に含まれる水分を除去する。厳密には、水分離モジュール(130)は、空気中に含まれる水分子を分離する。本例の水分離モジュール(130)は、サンセップ(登録商標)によって構成される、膜式のドライヤである。
流入流路(101)の被処理空気は、第2入口ポート(I2)を介して第2導入室(135)へ流入する。第2導入室(135)の空気は、各水分離膜(134)の内部を第3導出室(136)へ向かって流れる。給気幹路(102c)の空気は、第3入口ポート(I3)から第4導出室(137)へ流入する。
センサユニット(140)は、酸素センサ(141)と、二酸化炭素センサ(142)と、センサケース(143)とを備える。
空気流路(A)には、空気流れを変更するための流路切換機構が設けられる。流路切換機構は、第1切換弁(151)、第2切換弁(152)、第3切換弁(153)、第4切換弁(154)、および第5切換弁(155)を含む。これらの切換弁(151,152,153,154,155)は、三方弁によって構成される。
空気流路(A)には、第1逆止弁(157)および第2逆止弁(158)が設けられる。
空気流路(A)には、第1圧力センサ(161)と、第2圧力センサ(162)と、第3圧力センサ(163)とが設けられる。これらの圧力センサ(161,162,163)は、空気の圧力を検出する。
空気流路(A)には、第1圧力調節弁(171)と、第2圧力調節弁(172)とが設けられる。これらの圧力調節弁(171,172)は、空気の圧力を調節する圧力調節部の一例である。
図4および図5に示すように、空気調節装置(100)は、第2制御ユニット(190)を備える。第2制御ユニット(190)は、通信線(W)を介して第1制御ユニット(90)に接続される。通信線(W)は、第1制御ユニット(90)と第2制御ユニット(190)との間で、信号や情報の授受を相互に行う。通信線(W)は有線であるが、無線であってもよい。
空気調節装置(100)の運転動作を説明する。空気調節装置(100)の運転は、以下に説明する第1~第5運転を含む。本例において、第1~第5運転では、第2制御部(191)が第5切換弁(155)を第1状態とする。このため、これらの運転では、水分離モジュール(130)が空気中の水分を除去する動作を行う。
第1運転は、庫外空気と庫内空気の両方を被処理空気とし、第1空気を収納空間(5)へ供給して第2空気を庫外空間(6)へ排出する運転である。この第1運転は、収納空間(5)内の庫内空気の酸素濃度を引き下げるために行われる。
第2運転は、庫外空気を被処理空気とし、第1空気を庫内空間(5)へ供給して第2空気を庫外空間(6)へ排出する運転である。この第2運転は、収納空間(5)内の庫内空気の酸素濃度を引き下げるために行われる。
第3運転は、庫外空気と庫内空気の両方を被処理空気とし、第1空気を庫外へ排出して第2空気を庫内へ供給する運転である。この第3運転は、収納空間(5)内の庫内空気の酸素濃度を引き上げるために行われる。
第4運転は、庫外空気を被処理空気とし、第1空気を庫外へ排出して第2空気を庫内へ供給する運転である。この第4運転は、収納空間(5)内の庫内空気の酸素濃度を引き上げるために行われる。
第5運転は、庫外空気をそのまま庫内へ供給する運転である。この第5運転は、収納空間(5)内の庫内空気の酸素濃度を引き上げるために行われる。
空気調節装置(100)を長期間に亘って停止すると、ガス分離モジュール(120)のガス分離膜(124)の性能が低下してしまう。具体的には、ガス分離膜(124)は、ガスを分離するための多数の細孔を有する。空気調節装置(100)の低下に伴い長期間に亘ってガス分離モジュール(120)が使用されない場合、ガス分離膜(124)が収縮し、細孔のサイズが小さくなってしまう。この結果、ガス分離膜(124)による酸素や二酸化炭素の透過率が低下し、空気調節装置(100)によるガス分離の性能が低下してしまうという問題があった。
本実施形態の空気調節装置(100)は、上記の課題を解決するために第1動作を実行する。具体的には、第2制御部(191)は、空気調節装置(100)の所定期間の停止に伴うガス分離膜(124)の性能の低下を抑制する第1動作を実行する。本実施形態の第1動作は、被処理空気をガス分離膜(124)に供給する予備運転を含む。第2制御部(191)は、空気調節装置(100)の停止から所定期間が経過すると、予備運転を開始させる。
予備運転は、ガス分離膜(124)の被処理空気を供給する運転である。予備運転は、空気調節装置(100)の所定期間の停止に伴うガス分離膜(124)の性能の低下を抑制する目的でおこなわれる運転である。したがって、予備運転中の空気調節装置(100)は、上述した第1運転、第2運転、第3運転、および第4運転と同様の動作を行ってもよい。本実施形態の予備運転は、ユーザなどの人の操作に伴う運転指令により実行されない点で、上述した通常運転と異なる。
(6-1)
上述した実施形態の空気調節装置(100)は、空気調節装置(100)の所定期間の停止に伴うガス分離膜(124)の性能の低下を抑制する第1動作を実行させる第2制御部(191)を備える。このため、ガス分離膜(124)が収縮してその性能が低下した場合にも、第1動作により、ガス分離膜(124)の性能の低下を抑制できる。
第1動作は、被処理空気をガス分離膜(124)に供給する予備運転を含む。この予備運転において、被処理空気をガス分離膜(124)に供給すると、ガス分離膜(124)を拡張させることができ、その細孔のサイズを拡大できる。その結果、ガス分離膜(124)の性能を容易且つ速やかに回復できる。
第2制御部(191)は、空気調節装置(100)の停止から所定時間が経過すると、予備運転を開始させる。このため、空気調節装置(100)の停止に伴いガス分離膜(124)の性能が低下したタイミングに併せて、ガス分離膜(124)の性能を確実に回復させることができる。
空気調節装置(100)は、予備運転において、ガス分離膜(124)に供給される空気を加圧するエアポンプ(110)を備えている。これにより、ガス分離膜(124)を拡張させ易くなるので、ガス分離膜(124)の性能を速やか且つ確実に回復させることができる。
空気調節装置(100)は、予備運転において、ガス分離膜(124)に供給される空気の水分を減らす減湿部(111,113,130)を備える。これにより、水分がガス分離膜(124)の細孔を塞ぐことを抑制できるので、ガス分離膜(124)の性能の低下を抑制できる。
上述した実施形態においては、以下のような変形例の構成としてもよい。なお、以下の説明では、原則として、実施形態と異なる点について説明する。
変形例1の第2制御部(191)は、通常運転の開始時より所定時間前に予備運転を開始させる。この制御について、図14を参照しながら説明する。
図15に示すように、変形例2に係る空気調節装置(100)は、実施形態に係る水分離モジュール(130)、導入路(107)、水供給路(108)、および第5切換弁(155)を有していない。変形例2の空気調節装置(100)は、実施形態と同様にして、第1運転、第2運転、第3運転、第4運転、および第5運転を行う。変形例2では、給気幹路(102c)の空気が導入路(107)および水供給路(108)を介さず、直接的に収納空間(5)に送られる点が、実施形態と異なる。
図17に示すように、変形例3の空気調節装置(100)は、空気流路(A)に加熱部(175)が設けられる。加熱部(175)は、予備運転において、ガス分離膜(124)に供給される空気を加熱する。本例の加熱部(175)は、電気式のヒータによって構成される。加熱部(175)は、流入幹路(101c)に設けられる。具体的には、加熱部(175)は、水分離モジュール(130)とガス分離モジュール(120)の間に設けられる。
変形例4の第2制御部(191)は、第1動作として、空気調節装置(100)の運転を人に促すための動作を実行する。この動作に関する制御について、図18を参照しながら詳細に説明する。
変形例5の第2制御部(191)は、ガス分離膜(124)の性能に関する情報を出力する。この動作に関する制御について、図19を参照しながら詳細に説明する。図19に係る制御は、上述した実施形態の空気調節装置(100)に付加される。言い換えると、変形例5の空気調節装置(100)は、第1動作に加えて、ガス分離膜(124)の性能に関する情報を出力する動作(第2動作)を行う。
図20に示す変形例6の空気調節装置(100)は、実施形態に係る第5切換弁(155)が省略されている。変形例6では、庫内へ供給される空気が、導入路(107)および水供給路(108)を必ず流れて、収納空間(5)へ送られる。言い換えると、変形例6では、導入路(107)及び水供給路(108)が、給気幹路(102c)の一部を構成している。
参考例の空気調節装置(100)は、実施形態および変形例1~4に係る第1動作を行わない。言い換えると、参考例の空気調節装置(100)は、空気調節装置(100)の所定期間の停止に伴うガス分離膜(124)の性能の低下を抑制する動作を行わない。参考例の空気調節装置(100)は、変形例5に係る第2動作を行う。これにより、人は、ガス分離膜(124)の性能に関する情報を知ることができる。したがって、空気調節装置(100)の信頼性を確保できる。
加圧部は、エアポンプ(110)以外であってもよく、空気を圧縮する圧縮機や、空気を搬送するファンであってもよい。
2 コンテナ本体
5 庫内空間
6 庫外空間
10 冷凍装置
30 冷媒回路
100 空気調節装置
103 排気流路
110 エアポンプ(加圧部)
111 第1水分離器(減湿部)
113 第2水分離器(減湿部)
124 ガス分離膜
130 水分離モジュール(減湿部)
175 加熱部
191 制御部
Claims (12)
- 庫内空間(5)の庫内空気の組成を調節する空気調節装置であって、
被処理空気が供給されるガス分離膜(124)と、
空気調節装置の所定期間の停止に伴う前記ガス分離膜(124)の性能の低下を抑制する第1動作を実行させる制御部(191)とを備えている
空気調節装置。 - 前記第1動作は、前記被処理空気を前記ガス分離膜(124)に供給する予備運転を含む
請求項1に記載の空気調節装置。 - 前記制御部(191)は、前記空気調節装置の停止から所定時間が経過すると、前記予備運転を開始させる
請求項2に記載の空気調節装置。 - 前記制御部(191)は、前記空気調節装置の通常運転の開始時より所定時間前に前記予備運転を開始させる
請求項2に記載の空気調節装置。 - 前記予備運転において、前記ガス分離膜(124)で分離された第1空気および第2空気を庫外空間(6)に排出する排気流路(103)を備えている
請求項3または4に記載の空気調節装置。 - 前記予備運転において、前記ガス分離膜(124)に供給される空気を加熱する加熱部(175)を備えている
請求項3~5のいずれか1つに記載の空気調節装置。 - 前記予備運転において、前記ガス分離膜(124)に供給される空気を加圧する加圧部(110)を備えている
請求項3~6のいずれか1つに記載の空気調節装置。 - 前記予備運転において、前記ガス分離膜(124)に供給される空気中の水分を減らす減湿部(111,113,130)を備えている
請求項3~7のいずれか1つに記載の空気調節装置。 - 前記第1動作は、前記空気調節装置の運転を人に促すための動作を含む
請求項1~8のいずれか1つに記載の空気調節装置。 - 前記制御部(191)は、前記ガス分離膜(124)の性能に関する情報を出力する
請求項1~9のいずれか1つに記載の空気調節装置。 - 請求項1~10のいずれか1つの空気調節装置(100)と、
前記庫内空間(5)の内部の温度を調節する冷媒回路(30)とを備える
冷凍装置。 - 請求項11に記載の冷凍装置(10)と、
前記冷凍装置(10)が設けられるコンテナ本体(2)とを備えた
輸送用コンテナ。
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| PCT/JP2022/041900 Ceased WO2023112566A1 (ja) | 2021-12-14 | 2022-11-10 | 空気調節装置、冷凍装置、および輸送用コンテナ |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20240316491A1 (ja) |
| EP (1) | EP4420760B1 (ja) |
| JP (1) | JP7348546B2 (ja) |
| CN (1) | CN118338948B (ja) |
| WO (1) | WO2023112566A1 (ja) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH03127609A (ja) * | 1989-10-05 | 1991-05-30 | Andrew Corp | ガス供給装置及びガス除湿方法 |
| JPH1085545A (ja) * | 1996-09-18 | 1998-04-07 | Tokico Ltd | 乾燥空気供給装置 |
| JP2002191927A (ja) * | 2000-12-26 | 2002-07-10 | Ube Ind Ltd | ガス分離膜装置および運転休止方法 |
| JP2005205275A (ja) * | 2004-01-21 | 2005-08-04 | Matsushita Electric Ind Co Ltd | 選択性ガス富化装置 |
| US20140141139A1 (en) * | 2012-11-19 | 2014-05-22 | Membrane Technology And Research, Inc. | Membrane Separation Process for Controlling Gas Concentrations Within Produce Shipping or Storage Containers |
| JP2019066169A (ja) | 2017-09-29 | 2019-04-25 | ダイキン工業株式会社 | 庫内空気調節装置 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5472391B2 (ja) * | 2012-07-31 | 2014-04-16 | ダイキン工業株式会社 | コンテナ用冷凍装置 |
| KR101560805B1 (ko) * | 2014-09-03 | 2015-10-15 | 성균관대학교산학협력단 | 기체 분리 장치 |
| EP3222924B1 (en) * | 2014-11-19 | 2019-08-28 | Mitsubishi Electric Corporation | Air conditioning device |
| TWI710401B (zh) * | 2016-08-08 | 2020-11-21 | 日商旭化成股份有限公司 | 氣體分離用膜模組、連續氣體供給系統、烯烴氣體之製造方法、及膜模組單元 |
| CN206986115U (zh) * | 2017-01-22 | 2018-02-09 | 甘焱生 | 一种复合型垃圾填埋气纯化装置系统 |
| DE102019104902A1 (de) * | 2019-02-26 | 2020-08-27 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Passiv selbstregelnder Membranreaktor und Verfahren zur Durchführung von Gleichgewichtsreaktionen |
-
2021
- 2021-12-14 JP JP2021202395A patent/JP7348546B2/ja active Active
-
2022
- 2022-11-10 WO PCT/JP2022/041900 patent/WO2023112566A1/ja not_active Ceased
- 2022-11-10 EP EP22907097.4A patent/EP4420760B1/en active Active
- 2022-11-10 CN CN202280079966.1A patent/CN118338948B/zh active Active
-
2024
- 2024-05-23 US US18/672,021 patent/US20240316491A1/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03127609A (ja) * | 1989-10-05 | 1991-05-30 | Andrew Corp | ガス供給装置及びガス除湿方法 |
| JPH1085545A (ja) * | 1996-09-18 | 1998-04-07 | Tokico Ltd | 乾燥空気供給装置 |
| JP2002191927A (ja) * | 2000-12-26 | 2002-07-10 | Ube Ind Ltd | ガス分離膜装置および運転休止方法 |
| JP2005205275A (ja) * | 2004-01-21 | 2005-08-04 | Matsushita Electric Ind Co Ltd | 選択性ガス富化装置 |
| US20140141139A1 (en) * | 2012-11-19 | 2014-05-22 | Membrane Technology And Research, Inc. | Membrane Separation Process for Controlling Gas Concentrations Within Produce Shipping or Storage Containers |
| JP2019066169A (ja) | 2017-09-29 | 2019-04-25 | ダイキン工業株式会社 | 庫内空気調節装置 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP4420760A4 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2023087868A (ja) | 2023-06-26 |
| EP4420760A4 (en) | 2025-02-19 |
| JP7348546B2 (ja) | 2023-09-21 |
| EP4420760B1 (en) | 2025-12-31 |
| CN118338948B (zh) | 2025-02-25 |
| EP4420760C0 (en) | 2025-12-31 |
| CN118338948A (zh) | 2024-07-12 |
| EP4420760A1 (en) | 2024-08-28 |
| US20240316491A1 (en) | 2024-09-26 |
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