WO2023190259A1 - 圧縮機、および冷凍装置 - Google Patents
圧縮機、および冷凍装置 Download PDFInfo
- Publication number
- WO2023190259A1 WO2023190259A1 PCT/JP2023/012028 JP2023012028W WO2023190259A1 WO 2023190259 A1 WO2023190259 A1 WO 2023190259A1 JP 2023012028 W JP2023012028 W JP 2023012028W WO 2023190259 A1 WO2023190259 A1 WO 2023190259A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gas bearing
- passage
- coil
- compressor
- refrigerant
- 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
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/10—Centrifugal pumps for compressing or evacuating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/051—Axial thrust balancing
- F04D29/0513—Axial thrust balancing hydrostatic; hydrodynamic thrust bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/056—Bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/5806—Cooling the drive system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/02—Sliding-contact bearings for exclusively rotary movement for radial load only
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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
- F25B31/00—Compressor arrangements
- F25B31/006—Cooling of compressor or motor
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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
- F25B31/00—Compressor arrangements
- F25B31/02—Compressor arrangements of motor-compressor units
- F25B31/026—Compressor arrangements of motor-compressor units with compressor of rotary type
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/167—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings
- H02K5/1672—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings radially supporting the rotary shaft at both ends of the rotor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/10—Arrangements for cooling or ventilating by gaseous cooling medium flowing in closed circuit, a part of which is external to the machine casing
- H02K9/12—Arrangements for cooling or ventilating by gaseous cooling medium flowing in closed circuit, a part of which is external to the machine casing wherein the cooling medium circulates freely within the casing
Definitions
- the present disclosure relates to a compressor and a refrigeration device.
- Patent Document 1 discloses a turbo compressor.
- the injection nozzle bounces the coolant off the inner circumferential surface of the motor case, diffuses the coolant into a mist, and falls on the coil, so that the coil is cooled with the heat of vaporization. It is configured.
- Gas bearings are sometimes used in compressors. Compared to sliding bearings that use liquid such as oil, and rolling bearings that use oil for cooling, gas bearings are supplied with only gas (working fluid) and cannot use oil for cooling. , cooling performance is generally inferior.
- Patent Document 1 discloses a configuration in which a coil is immersed in a liquid refrigerant.
- a gas bearing is used in a compressor, it is not possible to fill the entire circumference of the gas bearing with liquid refrigerant, as there is a risk of damage to the gas bearing if liquid refrigerant is introduced into the bearing surface of the gas bearing. .
- the main parts that pose problems for cooling are the motor coil and the gas bearing, which are heat sources.
- these parts cannot be cooled efficiently and the cooling of these parts is insufficient, there is a risk that the coating of the coil may exceed the allowable temperature, and a gas bearing may reach the seizure temperature.
- An object of the present disclosure is to enable efficient cooling of a motor coil and a gas bearing.
- the first aspect is directed to a compressor.
- the compressor includes a rotating shaft (15), a motor (18) that rotates the rotating shaft (15), and a gas bearing that supports the rotating shaft (15). ) and the housing (20) of the gas bearing, there is provided a passage (Z) through which a refrigerant for cooling the coil (17) and the gas bearing flows.
- the coil (17) of the motor (18) and the gas bearing can be efficiently cooled.
- the gas bearing includes a radial gas bearing (40) that rotatably supports the rotating shaft (15), and the passage (Z) is connected to the motor (18). the coil (17) and the housing (21) of the radial gas bearing (40).
- the coil (17) of the motor (18) and the radial gas bearing (40) can be efficiently cooled.
- the radial gas bearing (40) is located inside the coil (17) when viewed in the radial direction of the rotating shaft (15).
- the radial gas bearing (40) can be effectively cooled.
- the gas bearing includes a thrust gas bearing (60) that supports the rotating shaft (15) in the axial direction, and the passageway (Z ) includes a second passage (Z2) provided between the coil (17) of the motor (18) and the housing of the thrust gas bearing (60).
- the coil (17) of the motor (18) and the thrust gas bearing (60) can be efficiently cooled.
- the gas bearing includes a thrust gas bearing (60) that supports the rotating shaft (15) in the axial direction, and the passage (Z) is
- the first passage (Z1) includes a second passage (Z2) provided between the coil (17) of the motor (18) and the housing of the thrust gas bearing (60), and the first passage (Z1) is connected to the second passage (Z2). communicate with.
- the coil (17) of the motor (18), the thrust gas bearing (60), and the radial gas bearing (40) can be efficiently cooled.
- the width dimension (d1) of the first passage (Z1) and the width dimension (d2) of the second passage (Z2) are the same.
- the refrigerant can flow through the first passage (Z1) and the second passage (Z2) so that the flow velocity of the refrigerant becomes uniform, the coil (17) of the motor (18)
- the thrust gas bearing (60) and the radial gas bearing (40) can be evenly cooled by the refrigerant, and the cooling performance by the refrigerant can be improved.
- a part of the coil (17) is immersed in the liquid refrigerant (E).
- a part of the coil (17) can be cooled by the liquid refrigerant (E).
- the eighth aspect is directed to a refrigeration system.
- the refrigeration system includes the compressor (10).
- the coil (17) of the motor (18) and the gas bearing can be efficiently cooled.
- FIG. 1 is a schematic overall configuration diagram of a refrigeration apparatus according to an embodiment.
- FIG. 2 is a sectional view of the compressor.
- FIG. 3 is a schematic diagram of the compressor.
- FIG. 4 is a schematic diagram of the compressor.
- FIG. 5 is a schematic diagram showing a configuration in which the first radial gas bearing is extended in the axial direction from the compressor shown in FIG. 4.
- FIG. 1 is a schematic diagram showing a refrigerant circuit (150) of a refrigeration system (100).
- the refrigeration device (100) includes a refrigerant circuit (150) filled with refrigerant.
- the refrigerant circuit (150) performs a vapor compression refrigeration cycle by circulating refrigerant.
- the refrigerant circuit (150) includes a compressor (10), a condenser (7), a first expansion valve (71), an evaporator (8), a main circuit (90), and a branch circuit (supply path). (91), a second expansion valve (72), a heater (73), a return circuit (92), and a subcircuit (93).
- the compressor (10) is, for example, a centrifugal compressor.
- the main circuit (90) circulates refrigerant to perform a vapor compression refrigeration cycle.
- gas refrigerant compressed by a compressor (10) radiates heat to air in a condenser (7).
- the gas refrigerant liquefies and changes into liquid refrigerant.
- the liquid refrigerant that has radiated heat is depressurized by the first expansion valve (71).
- the reduced pressure liquid refrigerant evaporates in the evaporator (8).
- the liquid refrigerant vaporizes and changes into gas refrigerant.
- the evaporated gas refrigerant is sucked into the compressor (10).
- the compressor (10) compresses the sucked gas refrigerant.
- the compressor (10) shown in FIGS. 1 and 2 includes a low-pressure impeller (11) and a high-pressure impeller (12) that are connected in series.
- the compressor (10) compresses the refrigerant in two stages using a low-pressure side impeller (11) and a high-pressure side impeller (12).
- the condenser (7) and evaporator (8) shown in FIG. 1 are, for example, cross-fin type fin-and-tube heat exchangers.
- a blower fan is provided near the condenser (7) and evaporator (8), respectively.
- the first expansion valve (71) and the second expansion valve (72) are each electronically controlled valves whose opening degree can be adjusted.
- a compressor (10), a condenser (7), a first expansion valve (71), and an evaporator (8) are sequentially connected by a main pipe (80) to form a main circuit (90).
- a refrigerant flows inside the main pipe (80).
- One end of a branch pipe (81) is connected to a position in the main pipe (80) between the condenser (7) and the first expansion valve (71).
- a refrigerant flows inside the branch pipe (81).
- a second expansion valve (72) and a heater (73) are located in the middle of the branch pipe (81) in order from the side closest to one end.
- the other end of the branch pipe (81) is connected to the compressor (10).
- the branch pipe (81), the second expansion valve (72), and the heater (73) form a branch circuit (91).
- the liquid refrigerant flowing through the branch circuit (91) is depressurized by the second expansion valve (72).
- the reduced pressure liquid refrigerant is heated in the heater (73).
- the liquid refrigerant vaporizes and changes into gas refrigerant.
- This gas refrigerant is introduced into the compressor (10) through the branch pipe (81).
- One end of the return pipe (82) is connected to the main pipe (80) at a position between the evaporator (8) and the compressor (10). Refrigerant flows inside the return pipe (82). The other end of the return pipe (82) is connected to the compressor (10).
- the return pipe (82) forms a return circuit (92).
- the sub circuit (93) has a sub piping (83).
- One end of the sub-piping (83) is connected to the outer periphery of the low-pressure impeller chamber (11a), and the other end is connected to the center of the high-pressure impeller chamber (12a).
- the sub-piping (83) connects the discharge side of the low-pressure side impeller chamber (11a) and the suction side of the high-pressure side impeller chamber (12a). The refrigerant compressed in the low pressure side impeller chamber (11a) is sucked into the high pressure side impeller chamber (12a) through the sub pipe (83).
- the refrigeration device (100) is, for example, an air conditioner.
- the air conditioner may be a dual-purpose air conditioner that switches between cooling and heating.
- the refrigerant circuit (150) includes a switching mechanism that switches the refrigerant circulation direction.
- the switching mechanism is, for example, a four-way switching valve.
- the air conditioner may be a cooling-only machine or a heating-only machine.
- the refrigeration device (100) may be a water heater, a chiller unit, a cooling device that cools the air inside the refrigerator, or the like.
- a cooling device is a device that cools the air inside a refrigerator, freezer, container, etc.
- FIG. 2 is a longitudinal sectional view of the compressor (10).
- the direction in which the rotating shaft (15) of the compressor (10) extends may be referred to as the axial direction, and the direction perpendicular to the axial direction may be referred to as the radial direction.
- these directional regulations do not limit the orientation of the compressor (10) during use or assembly.
- the compressor (10) includes a casing (13), a stator (14), a rotor (16), a rotating shaft (15), a coil (17), a low pressure side impeller (11), and a high pressure side. It includes an impeller (12), a first radial gas bearing (40), a second radial gas bearing (50), and a thrust gas bearing (60).
- the casing (13) accommodates other members constituting the compressor (10) inside.
- the casing (13) includes a body (130), a first closing member (131), and a second closing member (132).
- the body (130) is a generally cylindrical member extending in the axial direction.
- One axial side (V1) of the trunk (130) is closed by a first closing member (131).
- a high-pressure side impeller chamber (12a) is formed between the first closing member (131) and the above-mentioned high-pressure side impeller (12).
- the other side (V2) in the axial direction of the trunk (130) is closed by a second closing member (132).
- a low-pressure side impeller chamber (11a) is formed between the second closing member (132) and the above-mentioned low-pressure side impeller (11).
- the stator (14) has a generally cylindrical shape.
- the stator (14) is fixed to the inner circumferential surface of the body (130) at the axial center of the body (130).
- the rotor (16) is generally cylindrical.
- the rotor (16) is arranged radially inside (W2) with respect to the stator (14).
- the radially inner side (W2) is a direction in the radial direction that is close to the axis (T) of the rotating shaft (15).
- the radially outer side (W1) is a direction in the radial direction that is away from the axis (T) of the rotating shaft (15).
- the rotor (16) is spaced apart from the stator (14) in the radial direction.
- the rotor (16) is provided with magnets.
- the stator (14) is provided with a coil (17).
- the coil (17) In a cross section of the compressor (10) that passes through the axis (T) of the rotating shaft (15) and is parallel to the radial direction (see Figure 2), the coil (17) has a diameter relative to the stator (14). placed on both sides of the direction.
- the rotor (16) rotates with respect to the stator (14) due to the interaction between the magnetic flux and the current between the stator (14) and the rotor (16).
- the rotating shaft (15) extends in the axial direction.
- the rotating shaft (15) is located radially inside (W2) with respect to the rotor (16).
- a stator (14), a rotor (16), and a coil (17) constitute a motor (18).
- a rotor (16) is fixed to the rotating shaft (15).
- the rotating shaft (15) rotates together with the rotor (16).
- a high-pressure side impeller (12) is fixed to one axial side (V1) of the rotating shaft (15).
- a low-pressure side impeller (11) is fixed to the other axial side (V2) of the rotating shaft (15).
- the first radial gas bearing (40) is located on one side (V1) in the axial direction with respect to the rotor (16).
- the first radial gas bearing (40) forms a cylindrical gas film between the rotating shaft (15) and the body (130), thereby forming a first radial gas bearing (40) on one side (V1) of the rotating shaft (15) in the axial direction. ) is rotatably supported relative to the body (130).
- the first radial gas bearing (40) is a non-contact type gas bearing (for example, a gas bearing floated with gas such as a foil bearing).
- the second radial gas bearing (50) is located on the other axial side (V2) with respect to the rotor (16).
- the second radial gas bearing (50) forms a cylindrical gas film between the rotating shaft (15) and the body (130), thereby forming the second radial gas bearing (50) on the other axial side (V2) of the rotating shaft (15). ) is rotatably supported relative to the body (130).
- the second radial gas bearing (50) is a non-contact type gas bearing (for example, a gas bearing floated with gas such as a foil bearing).
- the thrust gas bearing (60) is located on one side (V1) in the axial direction with respect to the first radial gas bearing (40).
- the thrust gas bearing (60) supports the rotating shaft (15) in the axial direction.
- the thrust gas bearing (60) is a non-contact type gas bearing (for example, a gas bearing floated with gas such as a foil bearing).
- the first radial gas bearing (40) and the thrust gas bearing (60) are held by the first holding member (20).
- the first holding member (20) is an example of the housing of the gas bearing of the present invention.
- the second radial gas bearing (50) is held by the second holding member (30).
- the first holding member (20) is located on one side (V1) in the axial direction with respect to the rotor (16)
- the second holding member (30) is located on one side (V1) in the axial direction with respect to the rotor (16). located on the other axial side (V2).
- Each of the first holding member (20) and the second holding member (30) is generally formed into a disk shape.
- the outer peripheral surface of each of the first holding member (20) and the second holding member (30) is fixed to the inner wall of the casing (13).
- a rotating shaft (15) is inserted through the center portion of each of the first holding member (20) and the second holding member (30).
- a space (S) is formed inside the casing (13), between the stator (14), the rotor (16), the coil (17), the first holding member (20), and the second holding member (30), A space (S) is formed.
- An introduction channel (13a) and a discharge channel (13b) are formed in the casing (13).
- Each of the introduction channel (13a) and the discharge channel (13b) is a hole that communicates the outside of the casing (13) with the space (S) inside the casing (13).
- the casing (13) is provided with two introduction channels (13a) and two discharge channels (13b).
- the number of each of the introduction channel (13a) and the discharge channel (13b) is not particularly limited.
- the introduction channel (13a) communicates with the branch pipe (81) (see FIG. 1).
- the introduction channel (13a) communicates with a space located between the coil (17) and the first holding member (20) in the space (S) in the casing (13).
- the discharge flow path (13b) communicates with the return pipe (82) (see FIG. 1).
- the discharge flow path (13b) communicates with a space located between the coil (17) and the second holding member (30) among the spaces (S) in the casing (13).
- the discharge channel (13b) is located on the other radial side (V2) with respect to the introduction channel (13a).
- a passage (Z) through which a refrigerant flows is provided in the space (S) within the casing (13).
- the flow path (Z) extends from the introduction flow path (13a) to the space between the coil (17) and the first holding member (20), the space between the stator (14) and the rotor (16), After passing through the space between the coil (17) and the second holding member (30), it is provided so as to communicate with the discharge flow path (13b).
- Each of the first holding member (20) and the second holding member (30) has a guide function of guiding the refrigerant along the passage (Z).
- the refrigerant (gas refrigerant) flowing through the branch pipe (81) is sent to the space (S) in the casing (13) through the introduction channel (13a), and flows through the passage (Z) in the space (S) in the casing (13). ) and then sent to the return pipe (82) through the discharge channel (13b).
- the coil (17), the first radial gas bearing (40), the second radial gas bearing (50), the thrust gas bearing (60), etc. are cooled by the refrigerant flowing through the flow path (Z).
- the passage (Z) includes a first passage (Z1) and a second passage (Z2).
- the first passage (Z1) is a part of the passage (Z) provided between the coil (17) and the housing (21) of the first radial gas bearing (40).
- the housing (21) of the first radial gas bearing (40) is a portion of the first holding member (20) located around the first radial gas bearing (40).
- the first passageway (Z1) extends in the axial direction.
- the refrigerant flows through the first passage (Z1) in the other axial direction (V2).
- the second passage (Z2) is a part of the passage (Z) provided between the coil (17) and the housing (22) of the thrust gas bearing (60).
- the housing (22) of the thrust gas bearing (60) is a portion of the first holding member (20) located around the thrust gas bearing (60).
- the second passage (Z2) extends in the radial direction.
- the refrigerant flows radially inward (W2) through the first passage (Z1).
- a second passage (Z2) is provided upstream of the first passage (Z1).
- the first passage (Z1) communicates with the second passage (Z2).
- the gas bearing includes a first radial gas bearing (40) that rotatably supports the rotating shaft (15).
- the passage (Z) includes a first passage (Z1) provided between the coil (17) of the motor (18) and the housing (21) of the first radial gas bearing (40).
- the gas bearing includes a thrust gas bearing (60) that supports the rotating shaft (15) in the axial direction.
- the passage (Z) includes a second passage (Z2) provided between the coil (17) of the motor (18) and the housing (22) of the thrust gas bearing (60).
- the first radial gas bearing (40) may be located inside the coil (17) when viewed in the radial direction.
- the first radial gas bearing (40) is mounted so that the first radial gas bearing (40) does not protrude in the axial direction from the region (F) where the coil (17) is present when viewed in the radial direction.
- (40) is provided.
- the first radial gas bearing (40) when viewed in the radial direction, is arranged so that the first radial gas bearing (40) protrudes in the axial direction from the region (F) where the coil (17) is present.
- the protruding portion (41) of the first radial gas bearing (40) will be separated from the passage (Z), so the protrusion of the first radial gas bearing (40) due to the refrigerant flowing through the passage (Z) will occur.
- the cooling performance of the cooled portion (41) decreases.
- the first radial gas bearing (40) It is possible to suppress the formation of a portion of the gas bearing (40) that is separated from the passage (Z), and the entire first radial gas bearing (40) can be disposed close to the passage (Z). As a result, the first radial gas bearing (40) can be effectively cooled by the refrigerant flowing through the passage (Z).
- the width dimension (d1) of the first passage (Z1) and the width dimension (d2) of the second passage (Z2) may be the same (same includes substantially the same).
- the refrigerant can flow through the first passage (Z1) and the second passage (Z2) so that the flow rate of the refrigerant becomes uniform.
- the coil (17) of the motor (18), the first radial gas bearing (40), and the thrust gas bearing (60) can be evenly cooled by the refrigerant, and the coil (17) and the first radial gas bearing (60) can be evenly cooled by the refrigerant. 1.
- the cooling performance of the radial gas bearing (40) and the thrust gas bearing (60) can be improved.
- the width dimension (d1) of the first passage (Z1) is a dimension in the direction perpendicular to the direction in which the refrigerant flows in the first passage (Z1).
- the width dimension (d2) of the second passage (Z2) is a dimension in the direction perpendicular to the direction in which the refrigerant flows in the second passage (Z2).
- a portion of the coil (17) may be immersed in the liquid refrigerant (E). Thereby, a part of the coil (17) can be cooled by the liquid refrigerant (E).
- locations ( 23) may be curved to form an R shape. Thereby, when the refrigerant flows from the second passage (Z2) to the first passage (Z1), it can flow smoothly along the R shape of the passage (Z).
- the end (17a) of the coil (17) on one side (V1) in the axial direction may have a flat shape along the radial direction. Thereby, the refrigerant can be sent smoothly in the second passage (Z2).
- the present disclosure is useful for compressors and refrigeration equipment.
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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- Fluid Mechanics (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
本実施形態に係る冷凍装置(100)について、図1を参照して説明する。図1は、冷凍装置(100)の冷媒回路(150)を示す概略図である。冷凍装置(100)は、冷媒が充填される冷媒回路(150)を備える。冷媒回路(150)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(150)は、圧縮機(10)と、凝縮器(7)と、第1膨張弁(71)と、蒸発器(8)と、主回路(90)と、分岐回路(供給路)(91)と、第2膨張弁(72)と、ヒータ(73)と、戻り回路(92)と、副回路(93)とを備える。圧縮機(10)は、例えば、遠心型圧縮機である。
以下では、本実施形態に係る圧縮機(10)について、図2を参照して説明する。図2は、圧縮機(10)の縦断面図である。なお、以下の説明においては、圧縮機(10)の回転軸(15)が延びる方向を軸方向、軸方向に対して垂直な方向を径方向とそれぞれ称する場合がある。ただし、これらの方向の規定は、圧縮機(10)の使用時や組付け時の向き等を限定するものではない。
ケーシング(13)内の空間(S)には、冷媒が流れる通路(Z)が設けられる。流路(Z)は、導入流路(13a)から、コイル(17)と第1保持部材(20)との間の空間、固定子(14)と回転子(16)との間の空間、および、コイル(17)と第2保持部材(30)との間の空間を通過した後、排出流路(13b)に通じるように設けられる。第1保持部材(20)および第2保持部材(30)の各々は、通路(Z)に沿って冷媒を案内するガイド機能を有する。
以上のように、モータ(18)のコイル(17)と、第1保持部材(20)(気体軸受のハウジング)との間に、モータ(18)と気体軸受を冷却するための冷媒が流れる通路(Z)が設けられる(図2参照)。これにより、通路(Z)に冷媒を流すことで、モータ(18)のコイル(17)と、気体軸受との両方を冷却できるので、一つの通路(Z)で二部品(コイル(17)と気体軸受)を冷却でき、モータ(18)のコイル(17)と、気体軸受とを効率よく冷却することができる。
図4に示すように、径方向に見て、第1ラジアル気体軸受(40)がコイル(17)の内側に位置に位置していてもよい。この場合、図4に示すように、径方向に見て、コイル(17)が存在する領域(F)から第1ラジアル気体軸受(40)が軸方向にはみ出ないように、第1ラジアル気体軸受(40)が設けられる。例えば、図5に示すように径方向に見て、コイル(17)が存在する領域(F)から第1ラジアル気体軸受(40)が軸方向にはみ出るように第1ラジアル気体軸受(40)が設けられた場合、第1ラジアル気体軸受(40)のはみ出た部分(41)が通路(Z)から離間してしまうため、通路(Z)を流れる冷媒による第1ラジアル気体軸受(40)のはみ出た部分(41)の冷却性能が低下する。しかし、図4に示すように、径方向に見て、コイル(17)が存在する領域(F)から第1ラジアル気体軸受(40)が軸方向にはみ出ないようにすることで、第1ラジアル気体軸受(40)のうち通路(Z)から離間する部分が生じることを抑制でき、第1ラジアル気体軸受(40)全体を通路(Z)に近接させて配置できる。その結果、通路(Z)を流れる冷媒により第1ラジアル気体軸受(40)を効果的に冷却することができる。
15 回転軸
17 コイル
18 モータ
20 第1保持部材(ハウジング)
21 第1ラジアル気体軸受のハウジング(ラジアル気体軸受のハウジング)
22 スラスト気体軸受のハウジング
40 第1ラジアル気体軸受
60 スラスト気体軸受
100 冷凍装置
Z 通路
Z1 第1通路
Z2 第2通路
Claims (8)
- 回転軸(15)と、
前記回転軸(15)を回転させるモータ(18)と、
前記回転軸(15)を支持する気体軸受と
を備え、
前記モータ(18)のコイル(17)と前記気体軸受のハウジング(20)との間に、前記コイル(17)と前記気体軸受を冷却するための冷媒が流れる通路(Z)を設ける、圧縮機。 - 請求項1において、
前記気体軸受は、前記回転軸(15)を回転可能に支持するラジアル気体軸受(40)を含み、
前記通路(Z)は、前記モータ(18)のコイル(17)と前記ラジアル気体軸受(40)のハウジング(21)との間に設けられる第1通路(Z1)を含む、圧縮機。 - 請求項2において、
前記回転軸(15)の径方向に見て、前記ラジアル気体軸受(40)が前記コイル(17)の内側に位置する、圧縮機。 - 請求項1から請求項3のいずれか1項において、
前記気体軸受は、前記回転軸(15)を軸方向に支持するスラスト気体軸受(60)を含み、
前記通路(Z)は、前記モータ(18)のコイル(17)と前記スラスト気体軸受(60)のハウジングとの間に設けられる第2通路(Z2)を含む、圧縮機。 - 請求項2または請求項3において、
前記気体軸受は、前記回転軸(15)を軸方向に支持するスラスト気体軸受(60)を含み、
前記通路(Z)は、前記モータ(18)のコイル(17)と前記スラスト気体軸受(60)のハウジングとの間に設けられる第2通路(Z2)を含み、
前記第1通路(Z1)が前記第2通路(Z2)とが連通する、圧縮機。 - 請求項5において、
前記第1通路(Z1)の幅寸法(d1)と、前記第2通路(Z2)の幅寸法(d2)とが同じである、圧縮機。 - 請求項1から請求項6のいずれか1項において、
前記コイル(17)の一部が液冷媒(E)に浸かる、圧縮機。 - 請求項1から請求項7のいずれか1項に記載の圧縮機(10)を備える、冷凍装置。
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202380027251.6A CN118871678A (zh) | 2022-03-30 | 2023-03-24 | 压缩机及制冷装置 |
| EP23780269.9A EP4450824A4 (en) | 2022-03-30 | 2023-03-24 | COMPRESSOR AND COOLING DEVICE |
| US18/890,078 US20250012491A1 (en) | 2022-03-30 | 2024-09-19 | Compressor and refrigeration device |
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| JP2022-057013 | 2022-03-30 | ||
| JP2022057013A JP7401801B2 (ja) | 2022-03-30 | 2022-03-30 | 圧縮機、および冷凍装置 |
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| US18/890,078 Continuation US20250012491A1 (en) | 2022-03-30 | 2024-09-19 | Compressor and refrigeration device |
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Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20250012491A1 (ja) |
| EP (1) | EP4450824A4 (ja) |
| JP (1) | JP7401801B2 (ja) |
| CN (1) | CN118871678A (ja) |
| WO (1) | WO2023190259A1 (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2025206217A1 (ja) * | 2024-03-28 | 2025-10-02 | ダイキン工業株式会社 | 圧縮機及び冷凍装置 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080199326A1 (en) * | 2007-02-21 | 2008-08-21 | Honeywell International Inc. | Two-stage vapor cycle compressor |
| WO2013011939A1 (ja) | 2011-07-21 | 2013-01-24 | 株式会社Ihi | 電動モータ及びターボ圧縮機 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1206457C (zh) * | 2002-05-31 | 2005-06-15 | 乐金电子(天津)电器有限公司 | 涡轮压缩机轴承的散热结构 |
| JP4932921B2 (ja) * | 2010-03-31 | 2012-05-16 | 本田技研工業株式会社 | 電動遠心圧縮機 |
| JP2017089384A (ja) * | 2014-03-19 | 2017-05-25 | 株式会社豊田自動織機 | 電動ターボ式圧縮機 |
| JP2015183568A (ja) * | 2014-03-24 | 2015-10-22 | 株式会社豊田自動織機 | 流体機械 |
| KR101847165B1 (ko) * | 2017-04-05 | 2018-04-09 | 주식회사 뉴로스 | 에어포일 베어링을 장착한 터보블로워의 냉각 유로 구조 |
| CN111279086B (zh) * | 2017-11-01 | 2021-04-02 | 株式会社Ihi | 离心压缩机 |
| CN111486105B (zh) * | 2019-01-29 | 2022-04-29 | 青岛海尔智能技术研发有限公司 | 一种离心式压缩机和热泵系统 |
| US11913473B2 (en) * | 2020-03-17 | 2024-02-27 | Garrett Transportation I Inc | Compressor with electric motor coolant jacket having radial and axial portions |
| CN215058271U (zh) * | 2021-02-10 | 2021-12-07 | 西安交通大学 | 一种应用于大流量大膨胀比的高速透平结构 |
| CN215949903U (zh) * | 2021-10-15 | 2022-03-04 | 中船重工(重庆)西南装备研究院有限公司 | 一种新型空气悬浮鼓风机 |
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2022
- 2022-03-30 JP JP2022057013A patent/JP7401801B2/ja active Active
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- 2023-03-24 WO PCT/JP2023/012028 patent/WO2023190259A1/ja not_active Ceased
- 2023-03-24 CN CN202380027251.6A patent/CN118871678A/zh active Pending
- 2023-03-24 EP EP23780269.9A patent/EP4450824A4/en active Pending
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080199326A1 (en) * | 2007-02-21 | 2008-08-21 | Honeywell International Inc. | Two-stage vapor cycle compressor |
| WO2013011939A1 (ja) | 2011-07-21 | 2013-01-24 | 株式会社Ihi | 電動モータ及びターボ圧縮機 |
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|---|
| See also references of EP4450824A4 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2025206217A1 (ja) * | 2024-03-28 | 2025-10-02 | ダイキン工業株式会社 | 圧縮機及び冷凍装置 |
| JP2025156191A (ja) * | 2024-03-28 | 2025-10-14 | ダイキン工業株式会社 | 圧縮機及び冷凍装置 |
| JP7795143B2 (ja) | 2024-03-28 | 2026-01-07 | ダイキン工業株式会社 | 圧縮機及び冷凍装置 |
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| Publication number | Publication date |
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| US20250012491A1 (en) | 2025-01-09 |
| JP2023148797A (ja) | 2023-10-13 |
| EP4450824A1 (en) | 2024-10-23 |
| EP4450824A4 (en) | 2025-04-16 |
| CN118871678A (zh) | 2024-10-29 |
| JP7401801B2 (ja) | 2023-12-20 |
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