WO2017018272A1 - 室外ユニット - Google Patents
室外ユニット Download PDFInfo
- Publication number
- WO2017018272A1 WO2017018272A1 PCT/JP2016/071157 JP2016071157W WO2017018272A1 WO 2017018272 A1 WO2017018272 A1 WO 2017018272A1 JP 2016071157 W JP2016071157 W JP 2016071157W WO 2017018272 A1 WO2017018272 A1 WO 2017018272A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- outdoor unit
- heat exchanger
- refrigerant
- source side
- heat
- 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.)
- Ceased
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/36—Drip trays for outdoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/22—Means for preventing condensation or evacuating condensate
-
- 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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
-
- 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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
-
- 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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
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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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
- F25B47/022—Defrosting cycles hot gas defrosting
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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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
- F25B47/022—Defrosting cycles hot gas defrosting
- F25B47/025—Defrosting cycles hot gas defrosting by reversing the cycle
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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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/025—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units
- F25B2313/0253—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units in parallel arrangements
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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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02731—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one three-way valve
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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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
Definitions
- This invention relates to an outdoor unit in which a drainage channel is disposed below a heat source side heat exchanger.
- the present invention has been made against the background of the above problems, and an object of the present invention is to obtain an outdoor unit in which the risk of the open / close panel being frozen is suppressed.
- An outdoor unit is an outdoor unit that constitutes a part of a refrigeration cycle apparatus in which a refrigerant circulates and has a maintenance opening, and that is openably / closably attached to the outdoor unit and covers the maintenance opening And a heat source side heat exchanger having at least an open / close panel facing heat exchange portion disposed above the maintenance opening and facing the surface including the open / close panel, and at least the open / close panel facing heat exchange of the heat source side heat exchanger
- a drainage channel having a first drainage unit disposed below and inclined to a surface other than the surface including the open / close panel, and disposed adjacent to or in contact with at least a part of the drainage channel.
- a heat supply means, and the heat supply means has a refrigerant pipe through which a refrigerant having a temperature higher than the freezing point of water flows from the downstream direction to the upstream direction of the drainage channel.
- FIG. [Refrigeration cycle equipment] 1 is a diagram showing an example of the configuration of an outdoor unit according to Embodiment 1 of the present invention
- FIG. 2 is a diagram showing an example of the configuration of an indoor unit connected to the outdoor unit shown in FIG. is there.
- the refrigeration cycle apparatus (not shown) is configured by connecting the outdoor unit 1 shown in FIG. 1 and the indoor unit 200 shown in FIG. 2 with a refrigerant pipe.
- the refrigeration cycle apparatus is, for example, an air conditioner that performs indoor air conditioning inside a room.
- At least the compressor 12, the flow path switching device 14, the use side heat exchanger 202, the expansion device 204, and the heat source side heat exchanger 18 are refrigerant piping. And a refrigerant circuit in which the refrigerant circulates is formed.
- the indoor unit 200 shown in FIG. 2 is installed in a room or the like to be air-conditioned, and includes, for example, a use side heat exchanger 202 and an expansion device 204.
- the use-side heat exchanger 202 exchanges heat of the refrigerant with air, for example, and includes, for example, a heat transfer tube through which the refrigerant flows and a plurality of fins attached to the heat transfer tube.
- An indoor fan (not shown) that blows air to the usage-side heat exchanger 202 is installed in the vicinity of the usage-side heat exchanger 202.
- the expansion device 204 expands the refrigerant, and is, for example, a LEV (linear electronic expansion valve) whose opening degree can be adjusted, but may be a capillary tube or the like whose opening degree cannot be adjusted.
- LEV linear electronic expansion valve
- the outdoor unit 1 illustrated in FIG. 1 constitutes a part of the refrigeration cycle apparatus by being connected to the indoor unit 200 illustrated in FIG. 2 through a refrigerant pipe, for example.
- the outdoor unit 1 is installed outdoors outside the room, and functions as a heat source device that wastes or supplies heat from the air conditioning.
- the outdoor unit 1 includes a compressor 12, a first flow switching device 14A, a second flow switching device 14B, a first pressure reducing device 16A, a second pressure reducing device 16B, a first heat source side heat exchanger 18A, and a second heat source side.
- a heat exchanger 18B and an accumulator 26 are provided.
- first flow path switching device 14A and the second flow path switching device 14B may be simply described as the flow path switching device 14.
- the decompression device 16A and the second decompression device 16B may be described simply as the decompression device 16, and the first heat source side heat exchanger 18A and the second heat source side heat exchanger 18B are simply referred to as the heat source side heat exchanger 18. An explanation may be given.
- the compressor 12 sucks and compresses refrigerant and discharges it in a high temperature and high pressure state.
- the compressor 12 is an inverter compressor capable of capacity control, for example, but may be of a constant speed type.
- the flow path switching device 14 switches between the heating flow path and the cooling flow path according to switching of the operation mode of the cooling operation or the heating operation, and is configured by, for example, a four-way valve.
- the flow path switching device 14 may be configured by combining a plurality of two-way valves, for example.
- the decompression device 16 decompresses the refrigerant flowing into the heat source side heat exchanger 18, and is, for example, an electric valve that can adjust the opening degree, but may be a capillary tube or the like that cannot adjust the opening degree.
- the heat source side heat exchanger 18 exchanges heat between the refrigerant and air, and includes, for example, a heat transfer tube through which the refrigerant flows and a plurality of fins attached to the heat transfer tube.
- the heat transfer tube has, for example, a circular or flat shape.
- the fins are arranged in parallel with the direction in which air flows.
- the accumulator 26 stores refrigerant and is connected to the suction side of the compressor 12.
- the compressor 12 sucks gas refrigerant out of the refrigerant stored in the accumulator 26.
- the first flow path switching device 14A and the second flow path switching device 14B illustrated in FIG. 1 are connected to each other as indicated by broken lines. That is, the first flow path switching device 14A and the second flow path switching device 14B connect the discharge side of the compressor 12 to the first heat source side heat exchanger 18A and the second heat source side heat exchanger 18B, and the compressor 12 is connected to the use side heat exchanger 202 of the indoor unit 200 shown in FIG. The refrigerant compressed by the compressor 12 shown in FIG.
- the refrigerant condensed by flowing through the first heat source side heat exchanger 18A and the second heat source side heat exchanger 18B flows out of the outdoor unit 1 and flows into the indoor unit 200 shown in FIG.
- the refrigerant flowing into the indoor unit 200 is expanded by the expansion device 204 and flows through the use side heat exchanger 202.
- the refrigerant that has flowed through the use-side heat exchanger 202 and has evaporated flows out of the indoor unit 200 and flows into the outdoor unit 1 shown in FIG.
- the refrigerant that has flowed into the outdoor unit 1 is stored in the accumulator 26 via the first flow path switching device 14A.
- the refrigerant stored in the accumulator 26 is sucked into the compressor 12 and compressed again.
- the first flow path switching device 14A and the second flow path switching device 14B illustrated in FIG. 1 are connected to each other as indicated by a solid line. That is, the first flow path switching device 14A and the second flow path switching device 14B connect the discharge side of the compressor 12 to the use side heat exchanger 202 of the indoor unit 200 shown in FIG.
- the suction side of the machine 12 is connected to the first heat source side heat exchanger 18A and the second heat source side heat exchanger 18B via the accumulator 26.
- the refrigerant compressed by the compressor 12 flows out of the outdoor unit 1 through the first flow path switching device 14A and flows into the indoor unit 200 shown in FIG.
- the refrigerant flowing into the indoor unit 200 flows into the use-side heat exchanger 202, condenses, and is expanded by the expansion device 204.
- the refrigerant expanded by the expansion device 204 flows out of the indoor unit 200 and flows into the outdoor unit 1 shown in FIG.
- the refrigerant flowing into the outdoor unit 1 is decompressed by the first decompression device 16A and the second decompression device 16B, and flows through the first heat source side heat exchanger 18A and the second heat source side heat exchanger 18B.
- the refrigerant that has evaporated through the first heat source side heat exchanger 18A and the second heat source side heat exchanger 18B is stored in the accumulator 26 via the first flow path switching device 14A and the second flow path switching device 14B. .
- the refrigerant stored in the accumulator 26 is sucked into the compressor 12 and compressed again.
- FIG. 3 is a view of the front and left side surfaces of the outdoor unit according to Embodiment 1 of the present invention as seen from an oblique direction
- FIG. 4 is a view of the back surface and the right side surface of the outdoor unit shown in FIG. 3 as seen from an angle
- FIG. 5 is a view of the outdoor unit shown in FIG. 3 with the open / close panel removed and seen from the front side
- FIG. 6 shows a cross section of the heat exchange chamber of the outdoor unit shown in FIG. FIG.
- the outdoor unit 1 includes a main body 101 and a fan guard 106 provided on the upper portion of the main body 101.
- the main body 101 has a rectangular parallelepiped shape, for example, and houses the heat source side heat exchanger 18, the compressor 12, the electrical component box 36, and refrigerant pipes not shown in the figure, as shown in FIG. 5. is doing.
- the upper portion of the main body 101 is covered with a front upper panel 104A, a left side upper panel 104B, a rear upper panel 104C, and a right side upper panel 104D.
- the front upper panel 104A, the left side upper panel 104B, the rear upper panel 104C, and the right side upper panel 104D are substantially flat members, and constitute an upper outline of the outdoor unit 1.
- the front upper panel 104A is disposed on the upper front surface of the outdoor unit 1
- the left side upper panel 104B is disposed on the upper left side of the outdoor unit 1
- the rear upper panel 104C is disposed on the rear surface of the outdoor unit 1.
- the right side upper panel 104 ⁇ / b> D is arranged at the upper part, and is arranged at the upper part of the right side of the outdoor unit 1.
- the front upper panel 104A, the left side upper panel 104B, the rear side upper panel 104C, and the right side upper panel 104D have, for example, a plurality of air inlets (not shown) through which air passes. The air can be taken into the interior of the outdoor unit 1.
- a panel-type outdoor unit in which the outer shell of the upper portion of the outdoor unit 1 includes a front upper panel 104A, a left side upper panel 104B, a rear upper panel 104C, and a right side upper panel 104D.
- the outdoor unit 1 of this embodiment may be a frame-type outdoor unit in which the upper panel is omitted.
- the heat source side heat exchanger 18 is disposed above the maintenance opening 103.
- the heat source side heat exchanger 18 includes an open / close panel facing heat exchange unit 180 located at least on the front side of the outdoor unit 1.
- the open / close panel facing heat exchanging portion 180 faces the surface including the open / close panel 102 ⁇ / b> A above the maintenance opening 103.
- the heat source side heat exchanger 18 of the example of this embodiment includes a first heat source side heat exchanger 18A and a second heat source side heat exchanger 18B.
- the first heat source side heat exchanger 18A has a one-time bending shape, and is disposed to face the front upper panel 104A and the right side upper panel 104D.
- a portion of the first heat source side heat exchanger 18 ⁇ / b> A facing the front upper panel 104 ⁇ / b> A serves as an open / close panel facing heat exchange unit 180.
- the second heat source side heat exchanger 18B has a one-time bending shape, and is disposed to face the left side upper panel 104B and the rear upper panel 104C.
- the heat source side heat exchanger 18 is attached to, for example, a fixing member 34 below the heat source side heat exchanger 18.
- the fixing member 34 is, for example, a plate-like member that is attached to a frame (not shown) extending in the vertical direction of the outdoor unit 1 and supports the lower part of the heat exchange part of the heat source side heat exchanger 18.
- It may be a columnar member attached to the base portion 105 that constitutes the lower portion of 1.
- a partition plate is provided that partitions a room in which the heat source side heat exchanger 18 is installed from a room in which the compressor 12 and the like below the heat source side heat exchanger 18 are installed. Therefore, the freedom degree of arrangement
- the fan guard part 106 has a cylindrical shape, and a fan (not shown) is accommodated in the fan guard part 106.
- An air outlet 109 for blowing air from the inside of the outdoor unit 1 to the outside of the outdoor unit 1 is formed in the upper part of the fan guard part 106.
- outdoor air flows from the air inlets (not shown) formed in the front upper panel 104A, the left upper panel 104B, the rear upper panel 104C, and the right upper panel 104D. Captured inside.
- the air taken into the outdoor unit 1 passes through the heat source side heat exchanger 18 and is subjected to heat exchange, and then the air outlet shown in FIGS. 3 and 4. 109 is exhausted.
- aerodynamic performance is improved because air is uniformly sucked from the entire circumferential direction of the front surface, both side surfaces, and the back surface of the outdoor unit 1.
- the electric power for driving the fan is reduced, and further, the noise when the fan is driven is reduced.
- the lower part of the main body 101 is covered with an open / close panel 102A, a left side lower panel 102B, a rear lower panel 102C, and a right side lower panel 102D.
- the open / close panel 102 ⁇ / b> A, the left side lower panel 102 ⁇ / b> B, the back lower panel 102 ⁇ / b> C, and the right side lower panel 102 ⁇ / b> D are substantially flat members and constitute the outer shell of the lower part of the outdoor unit 1.
- the open / close panel 102A is disposed at the lower part of the front surface of the outdoor unit 1
- the lower left panel 102B is disposed at the lower part of the left side surface of the outdoor unit 1
- the rear lower panel 102C is the lower part of the rear surface of the outdoor unit 1.
- the right side lower panel 102D is arranged at the lower part of the right side of the outdoor unit 1.
- the open / close panel 102A shown in FIG. 3 is attached to the main body 101 so as to be openable and closable, and covers the maintenance opening 103 shown in FIG.
- the electrical component box 36 accommodates, for example, a control unit that controls the entire outdoor unit 1 and an inverter that drives the compressor 12.
- the electrical component box 36 includes radiating fins 38 that promote heat dissipation of the electrical component box 36.
- a drainage channel 32 is disposed at least below the heat exchanger 18 on the heat source side, at least below the heat exchanger 180 facing the open / close panel.
- the drainage channel 32 drains water such as dew condensation water generated in the heat source side heat exchanger 18, rainwater, or water generated when the heat source side heat exchanger 18 is defrosted.
- the drainage channel 32 can be configured to have a first drainage portion 32 ⁇ / b> A that is inclined downward toward the left side surface of the outdoor unit 1.
- the drainage channel 32 receives, for example, water from above, flows water to the left side of the outdoor unit 1 on the downstream side, and discharges water from the outside of the left side lower panel 102B to the outside of the outdoor unit 1.
- the drainage channel 32 receives water from above in the first drainage part 32 ⁇ / b> A and flows the water to the left side of the outdoor unit 1 on the downstream side, and then flows the water outdoor.
- the water may be discharged from the lower part of the outdoor unit 1 to the outside by moving downward inside the left side lower panel 102 ⁇ / b> B of the unit 1.
- the drainage channel 32 can be configured to include another drainage unit that communicates with the downstream side of the first drainage unit 32 ⁇ / b> A and extends in the vertical direction inside the outdoor unit 1. This other drainage section is configured as the second drainage section 32B in the second embodiment to be described later.
- the defrosting operation of the heat source side heat exchanger 18 is performed to melt frost and the like attached to the heat source side heat exchanger 18.
- the defrosting operation of the heat source side heat exchanger 18 is performed, for example, by heating the heat source side heat exchanger 18 with a heater (not shown).
- the defrosting operation of the heat source side heat exchanger 18 may be performed, for example, by switching the flow path switching device 14 and causing the high temperature refrigerant discharged from the compressor 12 to flow through the heat source side heat exchanger 18.
- the drainage channel 32 is configured to be inclined downward toward the left side surface of the outdoor unit 1, but is configured to be inclined downward toward the right side surface of the outdoor unit 1. Also good.
- the drainage channel 32 is also used for draining rainwater in rainy weather, but the drainage channel 32 is frozen because the temperature of the drainage channel 32 is not a low outside air environment that may be below the freezing point of water. It is not.
- the heat supply means 50 disposed close to or in contact with the drainage channel 32 allows the fluid to be drained by flowing a fluid having a temperature higher than the freezing point of water. The path 32 is suppressed from being below the freezing point of water.
- the refrigerant pipe connecting the expansion device 204, which is an example of the heat supply means 50, and the heat source side heat exchanger 18 flows the fluid in the drainage channel 32.
- the warm heat supply means 50 and the drainage channel 32 so as to oppose the flowing direction, the heat of the warm heat supply unit 50 is efficiently transmitted to the drainage channel 32.
- the heat supply means 50 ⁇ / b> A As shown in FIG. 1, the heat supply means 50 ⁇ / b> A according to the example of this embodiment is close to or in contact with the drainage channel 32 in the refrigerant pipe that connects the expansion device 204 and the heat source side heat exchanger 18. It consists of parts.
- FIG. 1 the positional relationship between the heat supply means 50A and the drainage channel 32 according to the example of this embodiment is schematically shown.
- the direction in which the refrigerant flows through the heat supply unit 50A is indicated by a solid line arrow, and water is The direction of flow is indicated by dotted arrows.
- the refrigerant before flowing into the heat source side heat exchanger 18 functioning as an evaporator flows in the refrigerant pipe connecting the expansion device 204 and the heat source side heat exchanger 18, the temperature of the drainage channel 32 is below the freezing point of water. The possibility of becoming can be suppressed. Note that the refrigerant pipe connecting the expansion device 204 and the heat source side heat exchanger 18 is disposed in contact with the drainage channel 32, so that the heat of the heat supply means 50 ⁇ / b> A is efficiently transmitted to the drainage channel 32. .
- the decompression device 16 is a part of the refrigerant pipe that connects the expansion device 204 and the heat source side heat exchanger 18 away from the drainage channel 32 and close to the heat source side heat exchanger 18. It is arranged.
- the portion where the refrigerant flows before being decompressed by the decompression device 16 is brought close to or in contact with the drainage channel 32 so that the heat supply means 50 ⁇ / b> A is provided.
- the possibility that the drainage channel 32 becomes a temperature below the freezing point of water is further suppressed. Further, as shown in FIG.
- the refrigerant pipe connecting the expansion device 204 that is the heat supply means 50 ⁇ / b> A and the heat source side heat exchanger 18 extends from the downstream direction of the drainage channel 32 to the upstream direction. It is arrange
- the temperature of the drainage is likely to be the lowest, and the amount of drainage is larger than that on the upstream side of the drainage channel 32, so that the drainage channel 32 may freeze in a low outside air environment. Becomes higher.
- the heat source side heat exchanger 18 has at least the open / close panel facing heat exchange section 180 facing the surface including the open / close panel 102A.
- the open / close panel counter heat exchange unit 180 of the heat source side heat exchanger 18 is dropped below the open / close panel counter heat exchange unit 180, for example, ice is generated in the base unit 105 and the open / close panel 102A is frozen. There is a fear. Therefore, in the example of this embodiment, the drainage channel 32 is disposed at least below the open / close panel facing heat exchange section 180.
- the drainage channel 32 is disposed to be inclined downward toward a surface other than the surface including the open / close panel 102A, the water drained by the drainage channel 32 is not discharged to the vicinity of the open / close panel 102A. Therefore, according to this embodiment, the possibility that water is collected near the opening / closing panel 102A is suppressed, and further, the possibility that the water collected near the opening / closing panel 102A is frozen is suppressed. Maintenance etc. of the outdoor unit 1 performed by opening can be easily performed.
- the drainage channel 32 is disposed to be inclined downward toward a surface other than the surface including the open / close panel 102A, the distance that water flows through the drainage channel 32 is long. It has become. Therefore, for example, when the heat source side heat exchanger 18 functions as an evaporator and the outdoor temperature decreases, the water may freeze in the drainage channel 32. If the water is frozen in the drainage channel 32, the drainage channel 32 may not be able to drain the water, the drainage channel 32 may overflow, and the overflowed water may be frozen to freeze the open / close panel 102A.
- the open / close panel facing heat exchange unit 180 is close to the surface including the open / close panel 102A.
- the drainage channel 32 disposed below is disposed adjacent to the open / close panel 102A. Therefore, in the example of this embodiment, the drainage channel 32 is provided by arranging the thermal supply means 50 for flowing a fluid having a temperature higher than the freezing point of water close to or in contact with at least a part of the drainage channel 32. The risk of being below the freezing point of water is suppressed.
- the heat supply means 50 ⁇ / b> A is configured by a refrigerant pipe that connects the expansion device 204 and the heat source side heat exchanger 18.
- the refrigerant pipe through which the refrigerant before flowing into the heat source side heat exchanger 18 functioning as an evaporator flows is disposed in close proximity to or in contact with at least a part of the drainage channel 32, the drainage channel 32 is freezing point of water. The possibility of the following temperature is suppressed.
- the decompression device 16 is a part of the refrigerant pipe that connects the expansion device 204 and the heat source side heat exchanger 18 away from the drainage channel 32 and close to the heat source side heat exchanger 18. It is arranged.
- the refrigerant pipes connecting the expansion device 204 and the heat source side heat exchanger 18 the refrigerant pipe through which the refrigerant before being decompressed by the decompression device 16 flows is brought close to or in contact with the drain path 32, thereby The possibility that the temperature of 32 becomes a temperature below the freezing point of water is further suppressed.
- the decompression device 16 When the decompression device 16 is constituted by an electric valve or the like that can adjust the opening, the pressure and temperature of the refrigerant flowing in the refrigerant pipe connecting the expansion device 204 and the heat source side heat exchanger 18 are used. Thus, the opening degree of the decompression device 16 may be adjusted. By adjusting the opening degree of the decompression device 16, the temperature of the refrigerant before being decompressed by the decompression device 16 can be adjusted, so that the possibility that the drainage channel 32 becomes a temperature below the freezing point of water is further suppressed. Can do. In addition, while adjusting the opening degree of the decompression device 16, the opening degree of the expansion apparatus 204 can also be adjusted. For example, the pressure of the refrigerant is measured by a pressure measuring device not shown, and the temperature of the refrigerant is measured by a temperature measuring device not shown.
- the warm heat supply means 50 may be configured by bringing a branch pipe branched from a refrigerant pipe connecting the expansion device 204 and the heat source side heat exchanger 18 close to or in contact with the drainage channel 32.
- the heat source side heat exchanger 18 including the first heat source side heat exchanger 18A having a one-time bent shape and the second heat source side heat exchanger 18B having a one-time bent shape is described.
- the heat source side heat exchanger 18 may be configured by one heat exchanger having a three-fold bent shape, or may be configured by four heat exchangers having no bent shape. That is, as shown in FIG. 6, the heat source side heat exchanger 18 according to this embodiment may be disposed on all side portions of the outdoor unit in a top view. That is, the heat source side heat exchanger 18 according to this embodiment has a heat exchange section that faces the front upper panel 104A, the left side upper panel 104B, the rear upper panel 104C, and the right side upper panel 104D. I just need it.
- the opening / closing panel 102A and the maintenance opening 103 are disposed in the lower part of the front surface of the outdoor unit 1 .
- the opening / closing panel 102A and the maintenance opening 103 are not limited to the outdoor unit. 1 may be disposed at the lower part of any one of the front surface, the left side surface, the back surface, and the right side surface.
- the open / close panel 102A and the maintenance opening 103 may be disposed below two or more of the front surface, left side surface, back surface, and right side surface of the outdoor unit 1.
- FIG. FIG. 7 is a diagram showing an example of the configuration of an outdoor unit according to Embodiment 2 of the present invention.
- the outdoor unit 1A illustrated in FIG. 7 portions having the same configuration as the outdoor unit 1 illustrated in FIG.
- the outdoor unit 1A in FIG. 7 is different from the outdoor unit 1 in FIG. 1 in that the outdoor unit 1A in FIG. 7 further includes a sub heat exchanger 19 and a branch pipe 28A.
- the sub heat exchanger 19 is connected to the branch pipe 28A, and heat-exchanges the refrigerant flowing from the branch pipe 28A.
- the sub heat exchanger 19 is disposed below the heat source side heat exchanger 18.
- the sub heat exchanger 19 and the heat source side heat exchanger 18 are integrally formed, for example, and are provided in different regions of the common fin.
- the sub heat exchanger 19 and the heat source side heat exchanger 18 may be configured separately.
- the sub heat exchanger 19 of the example of this embodiment includes a first sub heat exchanger 19A and a second sub heat exchanger 19B.
- the branch pipe 28A is branched from the refrigerant pipe connecting the compressor 12 and the use side heat exchanger 202 via the first flow path switching device 14A, and is connected to the sub heat exchanger 19.
- the branch pipe 28 ⁇ / b> A branches from the refrigerant pipe that connects the first flow path switching device 14 ⁇ / b> A and the use side heat exchanger 202 on the downstream side of the first flow path switching device 14 ⁇ / b> A.
- the sub heat exchanger 19 is connected.
- the branch pipe 28 ⁇ / b> A is provided with an opening / closing device 30 that controls the inflow of the refrigerant into the sub heat exchanger 19.
- the switchgear 30 may be arrange
- the opening / closing device 30 is, for example, an opening / closing switching valve that opens and closes to switch between an open state and a closed state.
- the opening / closing device 30 is configured by an electric valve or the like that can adjust the opening degree. The flow rate of the refrigerant flowing into 19 can be adjusted.
- FIG. 8 is a schematic diagram showing an example of the configuration of the heat supply means 50B according to Embodiment 2 of the present invention.
- the refrigerant flow is indicated by hatched block arrows
- the drainage flow is indicated by white block arrows.
- FIG. 9 is a schematic diagram in a top view showing an example of the configuration of the sub heat exchanger 19 according to Embodiment 2 of the present invention.
- the refrigerant flow is indicated by hatched block arrows
- the air flow passing through the heat source side heat exchanger 18 is indicated by white block arrows.
- the drainage channel 32 communicates with the first drainage portion 32A inclined downward toward the left side surface of the outdoor unit 1A and the downstream side of the first drainage portion 32A, and the interior of the outdoor unit 1A is communicated.
- a second drainage portion 32B that extends in the vertical direction and discharges drainage from a drainage base hole 33 provided on the bottom surface of the outdoor unit 1A can be provided.
- the sub heat exchanger 19 is configured to include a part of the branch pipe 28 ⁇ / b> A as the heat transfer pipe 29. Further, the sub heat exchanger 19 is disposed in proximity to or in contact with at least a part of the first drainage portion 32A. Further, a portion of the branch pipe 28A that does not constitute the heat transfer tube 29 of the sub heat exchanger 19 is disposed close to or in contact with at least a portion of the second drainage section.
- the heat transfer tube 29 has a refrigerant having a temperature higher than the freezing point of water from the downstream direction of the first drainage portion 32A toward the upstream direction at least on the open / close panel 102A side of the outdoor unit 1A. Configured to be washed away. Since the open / close panel 102A side of the outdoor unit 1A in the sub heat exchanger 19 is a place where frost formation is likely to occur, defrosting can be efficiently performed by flowing a refrigerant having a temperature higher than the freezing point of water. .
- the heat supply means 50B includes the portion close to or in contact with the second drainage portion 32B of the drainage channel 32 in the branch pipe 28A, and the sub heat exchanger 19. It consists of That is, since the high-temperature refrigerant discharged from the compressor 12 flows through the branch pipe 28A, the second pipe of the drainage channel 32 is brought into contact with or brought into contact with the second drainage part 32B of the drainage channel 32. The drainage part 32B is heated. Further, since the high-temperature refrigerant discharged from the compressor 12 flows through the sub heat exchanger 19 connected to the branch pipe 28A, the heat source side heat is generated by heat transfer and radiation from the fins of the sub heat exchanger 19 or the like.
- the first drainage portion 32A of the drainage channel 32 disposed below the exchanger 18 and the sub heat exchanger 19 is heated.
- the heat supply means 50B in the example of this embodiment opens the opening / closing device 30 and allows the refrigerant to flow through the branch pipe 28A only when there is a risk of water freezing in the drainage channel 32. It is good to operate to heat. For example, after the defrosting operation of the heat source side heat exchanger 18 is performed, the opening / closing device 30 is opened for a preset set time, the refrigerant flows through the branch pipe 28A, and the drainage path 32 is heated.
- the heat supply means 50 includes the heat supply means 50B and the heat supply means 50A described in the first embodiment, but the heat supply means 50A may be omitted.
- the heat supply means 50B is configured to include the sub heat exchanger 19 including the portion close to or in contact with the drainage channel 32 of the branch pipe 28A.
- the supply means 50 ⁇ / b> B may be configured to include a portion of the branch pipe 28 ⁇ / b> A that is close to or in contact with the second drainage portion 32 ⁇ / b> B of the drainage channel 32, or one of the sub heat exchangers 19.
- the heat supply means 50B is configured to include a portion of the branch pipe 28A that is close to or in contact with the drainage channel 32, the sub heat exchanger 19 can be omitted.
- FIG. 10 is a diagram showing an example of the configuration of an outdoor unit 1B according to Embodiment 3 of the present invention.
- the outdoor unit 1B described in FIG. 10 parts having the same configuration as the outdoor unit 1A illustrated in FIG.
- the outdoor unit 1B shown in FIG. 10 is different from the outdoor unit 1A shown in FIG. 7 in that the outdoor unit 1B shown in FIG. 10 is located on the upstream side of the first flow path switching device 14A and the first flow path switching device 14A.
- a branch pipe 28B connected to the sub heat exchanger 19 and a pressure sensor 62, a temperature sensor 64, and a control device 70.
- the branch pipe 28 ⁇ / b> B is branched and connected from the compressor 12 to the first flow path switching device 14 ⁇ / b> A disposed between the compressor 12 and the use side heat exchanger 202, so that the heat source side heat Even during the defrosting operation performed by flowing the high-temperature refrigerant discharged from the compressor 12 through the exchanger 18, the high-temperature refrigerant can be flowed through the branch pipe 28 ⁇ / b> B to heat the drainage channel 32.
- the defrosting operation performed by flowing the high-temperature refrigerant discharged from the compressor 12 to the heat source side heat exchanger 18 is provided inside the pressure sensor 62, the temperature sensor 64, and the control device 70. This is performed by switching the operations of the flow path switching device 14 and the opening / closing device 30 by the control device 70 based on the information from the timer or the like.
- the pressure sensor 62 is a low-pressure sensor that is disposed in the refrigerant pipe on the suction port side of the accumulator 26 and detects the pressure of the low-pressure refrigerant sucked into the compressor 12 through the accumulator 26.
- a quartz piezoelectric pressure sensor, a semiconductor sensor, a pressure transducer, or the like is used as a material of the pressure sensor 62.
- the temperature sensor 64 measures the temperature of the refrigerant flowing out from the use side heat exchanger 202 via the expansion device 204 during the heating operation through the refrigerant pipe, and during the cooling operation, the temperature sensor 64 connects the pressure reducing device 16 from the heat source side heat exchanger 18. The temperature of the refrigerant flowing out through the pipe is measured through the refrigerant pipe.
- a material of the temperature sensor 64 for example, a semiconductor material such as a thermistor or a metal material such as a resistance temperature detector is used.
- control device 70 includes, for example, driving or stopping of the refrigeration cycle device, capacity control of the compressor 12, or opening control of the decompression device 16, and the like. Can be configured to control the overall operation.
- the control device 70 is configured to receive pressure information detected by the pressure sensor 62 or temperature information detected by the temperature sensor 64.
- the control device 70 is configured as a dedicated hardware, a microcomputer or a microprocessing unit provided with a central processing unit, a memory, and the like.
- the control device 70 is accommodated in the electrical component box 36, for example. In FIG. 10, the internal structure of the control device 70 is not shown.
- control device 70 When the control device 70 is configured as dedicated hardware, the control device 70 can be configured by, for example, a single circuit, a composite circuit, an ASIC, an FPGA, or a combination thereof.
- the control device 70 may be configured such that each control process can be realized by individual hardware, or each control process may be performed by one piece of hardware.
- ASIC is an abbreviation for an application specific integrated circuit
- FPGA is an abbreviation for a field programmable gate array.
- control device 70 When the control device 70 is configured as a microcomputer or a microprocessing unit, the control process executed by the control device 70 is realized by software, firmware, or a combination of software and firmware. Software or firmware is described as a control program.
- the memory is configured as a storage unit of the control device 70 that stores the control program.
- the memory can be configured as a nonvolatile or volatile semiconductor memory such as a RAM, a ROM, a flash memory, an EPROM, or an EEPROM.
- the central processing unit is configured as an arithmetic unit that implements control processing by reading and executing a control program stored in a memory.
- the central processing unit is abbreviated as “CPU”.
- the central processing unit is also referred to as a processing unit, a processing unit, a microprocessor, or a processor.
- control device 70 may be configured so that part of the control processing is realized by dedicated hardware, and the remaining control processing is realized by a microcomputer or a microprocessing unit.
- FIG. 11 is a control flow diagram showing an example of control processing according to Embodiment 3 of the present invention.
- the time or time zone for performing the defrosting operation can be set by, for example, the timer function and the schedule function of the control device 70.
- the control apparatus 70 can be comprised so that the control processing of FIG. 11 can be repeatedly performed for every fixed time, for example, every 1 hour, at the time of heating operation.
- step S11 the control device 70 determines whether or not the defrosting operation start condition is satisfied.
- the control device 70 during the heating operation, for example, when the low pressure of the refrigerant detected by the pressure sensor 62 is 0.15 MPa or less, or when the refrigerant temperature detected by the temperature sensor 64 is ⁇ 8 ° C. or less, It is determined that the defrosting operation start condition is satisfied. If the defrosting operation start condition is not satisfied, the control process ends and normal heating operation is continued.
- step S12 the control device 70 performs control to reduce the operating frequency of the compressor 12 in order to switch the flow path switching device 14 safely. .
- the control device 70 performs control to reduce the operating frequency of the compressor 12 from about 100 Hz to about 30 Hz.
- step S13 the control device 70 performs control for switching the flow path switching device 14 and opening the opening / closing device 30, thereby starting the defrosting operation.
- step S14 the control device 70 performs control to increase the operating frequency of the compressor 12. For example, the control device 70 performs control to return the operating frequency of the compressor 12 from about 30 Hz to about 100 Hz.
- step S15 the control device 70 determines whether or not the defrosting operation end condition is satisfied.
- the control device 70 determines that the defrosting operation end condition is satisfied, for example, when the refrigerant temperature detected by the temperature sensor 64 is 25 ° C. or higher. Further, the control device 70 can be configured to determine that the defrosting operation end condition is satisfied when a certain time, for example, 10 minutes elapses from the start of the donation operation by using a timer. If the defrosting operation termination condition is not satisfied, the control process of step S15 is repeated at regular time intervals, for example, every one minute.
- step S16 the control device 70 performs control to reduce the operating frequency of the compressor 12 in order to switch the flow path switching device 14 safely.
- the control device 70 performs control to reduce the operating frequency of the compressor 12 from about 100 Hz to about 30 Hz.
- step S17 the control device 70 performs control to switch the flow path switching device 14 and close the opening / closing device 30, thereby ending the defrosting operation and performing a normal heating operation.
- the heat supply means 50 includes the heat supply means 50C and the heat supply means 50A described in the first embodiment, but the heat supply means 50A may be omitted.
- the heat supply means 50B is configured to include the sub-heat exchanger 19 including the portion close to or in contact with the drainage channel 32 of the branch pipe 28B.
- the supply means 50B may be configured to include a portion of the branch pipe 28B that is close to or in contact with the second drainage portion 32B of the drainage channel 32 or one of the sub heat exchangers 19.
- the heat supply means 50C is configured to include a portion of the branch pipe 28B that is close to or in contact with the drainage channel 32, the sub heat exchanger 19 can be omitted.
- FIG. FIG. 12 is a diagram for explaining an example of the configuration of the heat supply means according to Embodiment 4 of the present invention.
- the heat supply means 50D according to the example of this embodiment includes an air passage 42 that wastes heat generated by the electrical component box 36.
- the air passage 42 includes a duct 43 that takes in air from an opening 44 formed in the base portion 105 and flows the taken air in the vicinity of the drainage passage 32.
- the air flow in the duct 43 is generated when a fan disposed inside the fan guard unit 106 illustrated in FIG. 3 operates.
- at least a part of the heat radiating fins 38 for promoting the heat radiation of the electrical component box 36 is disposed in the duct 43. Further promoted.
- the electrical component box 36 since the air in the duct 43 heated by the electrical component box 36 warms the drainage channel 32, the possibility that the drainage channel 32 freezes is also suppressed.
- the electrical component box 36 generates heat at a temperature higher than at least the freezing point of water, and corresponds to the “heating element” of the present invention.
- the present invention is not limited to the above embodiment, and can be variously modified within the scope of the present invention. That is, the configuration of the above embodiment may be improved as appropriate, or at least a part of the configuration may be replaced with another configuration. Further, the configuration requirements that are not particularly limited with respect to the arrangement are not limited to the arrangement disclosed in the embodiment, and can be arranged at a position where the function can be achieved.
- heat supply means 50D described in the fourth embodiment can be applied in addition to the first to third embodiments.
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Abstract
Description
[冷凍サイクル装置]
図1は、この発明の実施の形態1に係る室外ユニットの構成の一例を示す図であり、図2は、図1に記載の室外ユニットに接続される室内ユニットの構成の一例を示す図である。図1に記載の室外ユニット1と図2に記載の室内ユニット200とが冷媒配管で接続されることによって冷凍サイクル装置(図示を省略)が構成される。冷凍サイクル装置は、例えば、部屋の内部の室内の空調を行う空気調和装置である。室外ユニット1と室内ユニット200とが冷媒配管で接続されることによって、少なくとも圧縮機12と流路切替装置14と利用側熱交換器202と膨脹装置204と熱源側熱交換器18とが冷媒配管で接続され、冷媒が循環する冷媒回路が形成される。
図2に記載の室内ユニット200は、空調対象である室内等に設置されるものであり、例えば、利用側熱交換器202と膨脹装置204とを備えている。利用側熱交換器202は、例えば冷媒を空気と熱交換させるものであり、例えば、冷媒が流れる伝熱管と、伝熱管に取り付けられた複数のフィンと、を含んで構成されている。利用側熱交換器202の近傍には、利用側熱交換器202への送風を行う室内ファン(図示を省略)が設置されている。膨脹装置204は、冷媒を膨脹させるものであり、例えば、開度を調整できるLEV(リニア電子膨張弁)であるが、開度を調整できないキャピラリーチューブ等であってもよい。
図1に記載の室外ユニット1は、例えば、図2に記載の室内ユニット200と冷媒配管で接続されることによって冷凍サイクル装置の一部分を構成するものである。室外ユニット1は、部屋の外部の屋外に設置され、空調の熱を廃熱または供給する熱源機として機能する。室外ユニット1は、圧縮機12と第1流路切替装置14Aと第2流路切替装置14Bと第1減圧装置16Aと第2減圧装置16Bと第1熱源側熱交換器18Aと第2熱源側熱交換器18Bとアキュムレータ26とを備えている。なお、以下では、この実施の形態の理解を容易にするため、第1流路切替装置14Aおよび第2流路切替装置14Bを、単に流路切替装置14として説明を行う場合があり、第1減圧装置16Aおよび第2減圧装置16Bを、単に減圧装置16として説明を行う場合があり、第1熱源側熱交換器18Aおよび第2熱源側熱交換器18Bを、単に熱源側熱交換器18として説明を行う場合がある。
まず、冷房運転時の室外ユニット1の動作の例について説明する。冷房運転を行うときは、図1に記載の第1流路切替装置14Aおよび第2流路切替装置14Bが破線で示すように流路を接続している。すなわち、第1流路切替装置14Aおよび第2流路切替装置14Bは、圧縮機12の吐出側を、第1熱源側熱交換器18Aおよび第2熱源側熱交換器18Bに接続し、圧縮機12の吸入側を、アキュムレータ26を介して、図2に示す室内ユニット200の利用側熱交換器202に接続している。図1に示す圧縮機12で圧縮された冷媒は、第1流路切替装置14A、第2流路切替装置14Bを介して、第1熱源側熱交換器18A、第2熱源側熱交換器18Bを流れる。第1熱源側熱交換器18A、第2熱源側熱交換器18Bを流れて凝縮された冷媒は、室外ユニット1から流出して、図2に示す室内ユニット200に流入する。室内ユニット200に流入した冷媒は、膨脹装置204で膨脹され、利用側熱交換器202を流れる。利用側熱交換器202を流れて蒸発した冷媒は、室内ユニット200から流出して、図1に示す室外ユニット1に流入する。室外ユニット1に流入した冷媒は、第1流路切替装置14Aを介して、アキュムレータ26に貯留される。アキュムレータ26に貯留された冷媒は、圧縮機12に吸入され、再び圧縮される。
次に、暖房運転時の室外ユニット1の動作の例について説明する。暖房運転を行うときは、図1に記載の第1流路切替装置14Aおよび第2流路切替装置14Bが実線で示すように流路を接続している。すなわち、第1流路切替装置14Aおよび第2流路切替装置14Bは、圧縮機12の吐出側を、図2に示す室内ユニット200の利用側熱交換器202に接続し、図1に示す圧縮機12の吸入側を、アキュムレータ26を介して、第1熱源側熱交換器18Aおよび第2熱源側熱交換器18Bに接続している。圧縮機12で圧縮された冷媒は、第1流路切替装置14Aを介して、室外ユニット1から流出し、図2に示す室内ユニット200に流入する。室内ユニット200に流入した冷媒は、利用側熱交換器202に流れて凝縮して、膨脹装置204で膨脹される。膨脹装置204で膨脹された冷媒は、室内ユニット200から流出して、図1に示す室外ユニット1に流入する。室外ユニット1に流入した冷媒は、第1減圧装置16A、第2減圧装置16Bで減圧されて、第1熱源側熱交換器18A、第2熱源側熱交換器18Bを流れる。第1熱源側熱交換器18A、第2熱源側熱交換器18Bを流れて蒸発した冷媒は、第1流路切替装置14A、第2流路切替装置14Bを介して、アキュムレータ26に貯留される。アキュムレータ26に貯留された冷媒は、圧縮機12に吸入され、再び圧縮される。
図6に示すように、熱源側熱交換器18の、少なくとも開閉パネル対向熱交換部180の下方には、排水路32が配設されている。排水路32は、例えば、熱源側熱交換器18で発生する結露水、雨水、または熱源側熱交換器18の除霜運転を行ったときに発生する水等の水を排水するものである。排水路32は、例えば、図6に示すように、室外ユニット1の左側面に向かって下向きに傾斜する第1排水部32Aを有するように構成できる。排水路32は、例えば、上方からの水を受けて、水を下流側である室外ユニット1の左側面側に流して、水を左側面下部パネル102Bの外側から室外ユニット1の外部に排出するように構成できる。また、図6では図示しないが、排水路32は、第1排水部32Aにおいて、上方からの水を受けて、水を下流側である室外ユニット1の左側面側に流した後に、水を室外ユニット1の左側面下部パネル102Bの内側で下方に移動させて、水を室外ユニット1の下部から外部に排出するように構成してもよい。図6では図示しないが、例えば、排水路32は、第1排水部32Aの下流側と連通し、室外ユニット1の内部を鉛直方向に延在する別の排水部を備えるように構成できる。この別の排水部は、後述する実施の形態2では第2排水部32Bとして構成されるものである。なお、熱源側熱交換器18の除霜運転は、熱源側熱交換器18に付着した霜等を溶かすために行われるものである。熱源側熱交換器18の除霜運転は、例えば、図示を省略してあるヒータが熱源側熱交換器18を加熱することによって行われる。熱源側熱交換器18の除霜運転は、例えば流路切替装置14を切り替えて、熱源側熱交換器18に圧縮機12から吐出された高温の冷媒を流すことによって行われてもよい。また、図6では、排水路32は、室外ユニット1の左側面に向かって下向きに傾斜するように構成されているが、室外ユニット1の右側面に向かって下向きに傾斜するように構成してもよい。なお、排水路32は、雨天時において、雨水を排水するためにも用いられるが、排水路32の温度が水の凝固点以下となるおそれのある低外気環境ではないため、排水路32が凍るおそれはない。
図1に示すように、この実施の形態の例に係る温熱供給手段50Aは、膨脹装置204と熱源側熱交換器18とを接続する冷媒配管のうちの、排水路32に近接または当接した部分で構成されている。図1では、この実施の形態の例に係る温熱供給手段50Aと排水路32の位置関係を概略的に示し、温熱供給手段50Aに冷媒が流れる向きを実線の矢印で、排水路32で水が流れる向きを点線の矢印で、それぞれ示している。膨脹装置204と熱源側熱交換器18とを接続する冷媒配管には、蒸発器として機能する熱源側熱交換器18に流入する前の冷媒が流れるため、排水路32が水の凝固点以下の温度となるおそれを抑制することができる。なお、膨脹装置204と熱源側熱交換器18とを接続する冷媒配管が、排水路32と当接して配設されることによって、温熱供給手段50Aの熱が排水路32に効率良く伝達される。また、この実施の形態の例では、減圧装置16が、膨脹装置204と熱源側熱交換器18とを接続する冷媒配管のうちの、排水路32から遠ざかり且つ熱源側熱交換器18に近づく部分に配設されている。膨脹装置204と熱源側熱交換器18とを接続する冷媒配管のうちの、減圧装置16で減圧される前の冷媒が流れる部分を、排水路32に近接または当接させて温熱供給手段50Aを構成することによって、排水路32が水の凝固点以下の温度となるおそれがさらに抑制される。また、図1に示すように、この実施の形態の例では、温熱供給手段50Aである膨脹装置204と熱源側熱交換器18とを接続する冷媒配管は、排水路32の下流方向から上流方向に向けて水の凝固点よりも高い温度の冷媒を流すように配置される。排水路32の下流側は、排水の温度が最も低温になりやすく、かつ、排水路32の上流側と比較して排水量が多いため、低外気環境下においては、排水路32が凍結する可能性が高くなる。この実施の形態の例では、排水路32の下流側から、水の凝固点よりも高い温度の冷媒を流すことにより、排水が最も低温になりやすい下流側での排水路32の凍結を効率良く抑制できるため、開閉パネル102Aの近傍で溜まった水が凍るおそれを抑制できる。
図7は、この発明の実施の形態2に係る室外ユニットの構成の一例を示す図である。なお、図7に記載の室外ユニット1Aにおいて、図1に記載の室外ユニット1と同一の構成を有する部位には同一の符号を付してその説明を省略する。図7の室外ユニット1Aが、図1の室外ユニット1と異なる点は、図7の室外ユニット1Aが、サブ熱交換器19および分岐配管28Aをさらに備えている点である。
図10は、この発明の実施の形態3に係る室外ユニット1Bの構成の一例を示す図である。なお、図10に記載の室外ユニット1Bにおいて、図7に記載の室外ユニット1Aと同一の構成を有する部位には同一の符号を付してその説明を省略する。図10の室外ユニット1Bが、図7の室外ユニット1Aと異なる点は、図10の室外ユニット1Bが、第1流路切替装置14Aと第1流路切替装置14Aの上流側にある圧縮機12とを接続する冷媒配管から分岐して、サブ熱交換器19に接続された分岐配管28Bを備えている点、並びに圧力センサ62、温度センサ64、及び制御装置70を備えている点である。分岐配管28Bは、圧縮機12と利用側熱交換器202との間に配置された第1流路切替装置14Aと、圧縮機12との間から分岐して接続されることによって、熱源側熱交換器18に圧縮機12から吐出された高温の冷媒を流して行う除霜運転時も、分岐配管28Bに高温の冷媒を流して、排水路32を加熱することができる。
図12は、この発明の実施の形態4に係る温熱供給手段の構成の一例を説明する図である。図12に示すように、この実施の形態の例に係る温熱供給手段50Dは、電装品箱36が発する熱を廃熱する風路42を含んで構成されている。風路42は、ベース部105に形成された開口部44から空気を取り込んで、取り込んだ空気を排水路32の近傍に流すダクト43を含んで構成されている。ダクト43内の空気流れは、図3に記載のファンガード部106の内部に配設されたファンが動作することによって発生する。図12に示すように、ダクト43内には、電装品箱36の放熱を促進させる放熱フィン38の少なくとも一部分が配設されており、ダクト43に空気が流れることによって電装品箱36の放熱がさらに促進される。また、電装品箱36で温められたダクト43内の空気が、排水路32を温めるため、排水路32が凍結するおそれも抑制される。なお、電装品箱36は、少なくとも水の凝固点よりも高い温度で発熱するものであり、この発明の「発熱体」に相当するものである。
Claims (15)
- 冷媒が循環する冷凍サイクル装置の一部分を構成し、メンテナンス用開口部を有する室外ユニットであって、
当該室外ユニットに開閉自在に取り付けられ、前記メンテナンス用開口部を覆う開閉パネルと、
前記メンテナンス用開口部の上方に配設され、前記開閉パネルを含む面と対向する開閉パネル対向熱交換部を少なくとも有する熱源側熱交換器と、
前記熱源側熱交換器の、少なくとも前記開閉パネル対向熱交換部の下方で、前記開閉パネルを含む面以外の面に向かって下向きに傾斜して配設された第1排水部を有する排水路と、
前記排水路の少なくとも一部分に近接または当接して配設された温熱供給手段と、
を備え、
前記温熱供給手段は、
前記排水路の下流方向から上流方向に向けて水の凝固点よりも高い温度の冷媒を流す冷媒配管を有する
室外ユニット。 - 前記熱源側熱交換器は、上面視において前記室外ユニットの全ての側面部に配設されている
請求項1に記載の室外ユニット。 - 前記冷媒配管は、
前記冷凍サイクル装置の膨脹装置と前記熱源側熱交換器とを接続する配管である、
請求項1または請求項2に記載の室外ユニット。 - 前記膨脹装置と前記熱源側熱交換器とを接続する前記冷媒配管のうち、前記排水路から遠ざかり且つ前記熱源側熱交換器に近づく部分に配設され、前記冷媒の圧力を減圧する減圧装置をさらに備えた、
請求項3に記載の室外ユニット。 - 前記冷媒配管は、
前記冷凍サイクル装置の圧縮機と前記冷凍サイクル装置の利用側熱交換器との間から分岐して接続された分岐配管である、
請求項1~4の何れか一項に記載の室外ユニット。 - 前記分岐配管は、
前記冷凍サイクル装置の圧縮機と前記冷凍サイクル装置の利用側熱交換器との間に配置された前記冷凍サイクル装置の流路切替装置と、前記冷凍サイクル装置の利用側熱交換器との間から分岐して接続されている
請求項5に記載の室外ユニット。 - 前記分岐配管は、
前記冷凍サイクル装置の圧縮機と前記冷凍サイクル装置の利用側熱交換器との間に配置された前記冷凍サイクル装置の流路切替装置と、前記冷凍サイクル装置の圧縮機との間から分岐して接続されている
請求項5に記載の室外ユニット。 - 前記温熱供給手段は、
前記熱源側熱交換器の下方に配設され、前記分岐配管の一部を伝熱管として備えたサブ熱交換器をさらに有する、
請求項5~7の何れか一項に記載の室外ユニット。 - 前記サブ熱交換器は、
前記第1排水部の少なくとも一部分に近接または当接して配設され、
前記伝熱管には、少なくとも前記室外ユニットの前記開閉パネルの側において、前記第1排水部の下流方向から上流方向に向けて水の凝固点よりも高い温度の冷媒が流される
請求項8に記載の室外ユニット。 - 前記排水路は、
前記第1排水部の下流側と連通し、前記室外ユニットの内部を鉛直方向に延在する第2排水部を備え、
前記分岐配管のうち、前記サブ熱交換器において前記伝熱管を構成しない部分は、
前記第2排水部の少なくとも一部分に近接または当接して配設される
請求項8または請求項9に記載の室外ユニット。 - 前記熱源側熱交換器と前記サブ熱交換器とは、共通のフィンの異なる領域に設けられている、
請求項8~10の何れか一項に記載の室外ユニット。 - 前記水の凝固点よりも高い温度で発熱する発熱体をさらに備え、
前記温熱供給手段は、
前記発熱体で温められた空気が流れる風路をさらに有する、
請求項1~11の何れか一項に記載の室外ユニット。 - 前記風路を形成するダクトをさらに備えた、
請求項12に記載の室外ユニット。 - 前記発熱体は、
前記冷凍サイクル装置の圧縮機を駆動するインバータを含む、
請求項12または請求項13に記載の室外ユニット。 - 前記発熱体は、
該発熱体の放熱を促進させる放熱フィンを含み、
前記放熱フィンの少なくとも一部分が前記風路の内部に配設された、
請求項12~14の何れか一項に記載の室外ユニット。
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Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2017018272A1 (ja) | 2018-02-08 |
| CN107923661A (zh) | 2018-04-17 |
| CN107923661B (zh) | 2020-06-16 |
| US10386082B2 (en) | 2019-08-20 |
| GB2557075A (en) | 2018-06-13 |
| US20180180306A1 (en) | 2018-06-28 |
| WO2017017813A1 (ja) | 2017-02-02 |
| GB2557075B (en) | 2020-09-09 |
| JP6509345B2 (ja) | 2019-05-08 |
| GB201801510D0 (en) | 2018-03-14 |
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