WO2019075921A1 - Compresseur et climatiseur comprenant celui-ci - Google Patents

Compresseur et climatiseur comprenant celui-ci Download PDF

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Publication number
WO2019075921A1
WO2019075921A1 PCT/CN2017/119425 CN2017119425W WO2019075921A1 WO 2019075921 A1 WO2019075921 A1 WO 2019075921A1 CN 2017119425 W CN2017119425 W CN 2017119425W WO 2019075921 A1 WO2019075921 A1 WO 2019075921A1
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WO
WIPO (PCT)
Prior art keywords
motor
bearing
stator
cooling section
cooling
Prior art date
Application number
PCT/CN2017/119425
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English (en)
Chinese (zh)
Inventor
刘华
钟瑞兴
张治平
蒋楠
陈玉辉
刘增岳
雷连冬
Original Assignee
格力电器（武汉）有限公司
珠海格力电器股份有限公司
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Application filed by 格力电器（武汉）有限公司, 珠海格力电器股份有限公司 filed Critical 格力电器（武汉）有限公司
Publication of WO2019075921A1 publication Critical patent/WO2019075921A1/fr

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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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
    • 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
    • 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

Definitions

  • the present disclosure relates to the field of air conditioning equipment, and in particular to a compressor and an air conditioner having the same.
  • FIG. 1 is a motor return pipe connection structure, the motor return pipe 2' is external, it is connected to the motor through the first connection point 1', the motor return pipe 2' passes through the second connection point 5' and the evaporator or the intermediate economizer connection.
  • the motor return pipe 2' is fixed by the first fixing bracket 3' and the second fixing bracket 4'.
  • the cooling method of the motor has an external connecting pipe for supplying the refrigerant, which results in a complicated overall structure and high cost, and the number of potential hidden points increases due to the increase of the connecting pipe, which affects the overall reliability.
  • the present disclosure is directed to providing a compressor capable of reducing a connecting line and an air conditioner having the same.
  • the present disclosure provides a compressor including: a motor including a motor housing and a cooling passage disposed in the motor housing;
  • a first compression portion is disposed at the first end of the motor, the first compression portion includes a first housing and a first diffuser coupled to the first housing, the first diffuser is provided with a return air port, and the cooling passage is passed The air return port is in communication with the first compression portion.
  • the end of the air return port close to the motor is a first end
  • the end of the air return port close to the first compression portion is a second end
  • the connection between the first end and the second end of the air return port is a first connection, the first connection a first angle between the line and a vertical plane of the axis of rotation of the motor;
  • the distance between the first end of the air return port and the axis of rotation is less than the distance between the second end of the air return port and the axis of rotation.
  • the first angle ranges from 15° to 35°.
  • first connection line has a second angle with a plane defined by the motor rotation axis and the first connection midpoint;
  • the projection length of the first end of the air return port from the rotation axis in the vertical plane of the rotation axis is smaller than the projection length of the distance between the second end of the air return port and the rotation axis in the vertical plane of the rotation axis.
  • the second angle ranges from 55° to 75°.
  • the center of the first circumference is located on the rotation axis of the motor.
  • the air return ports are evenly spaced on the first circumference, and a line connecting the centers of the two adjacent air return ports and the center of the first circumference forms a third angle, and the third angle ranges from 12°. Up to 30°.
  • the motor further includes a stator disposed in the motor housing and fixedly connected to the motor housing, the cooling passage includes a first cooling section, and the first cooling section is disposed on the inner wall of the motor housing and corresponds to the stator The position of the first cooling section faces the stator.
  • first cooling section is a spiral section extending helically in the axial direction of the stator.
  • the compressor further includes a motor coolant inlet, the motor coolant inlet is in communication with the first cooling section, and is located on the motor housing corresponding to the position of the stator.
  • the motor further comprises:
  • the rotor, the rotor is located in the stator, the cooling passage further includes a second cooling section, and the second cooling section includes a gap between the rotor and the stator.
  • the motor further comprises a bearing assembly
  • the bearing assembly comprises a bearing
  • the cooling passage further comprises a bearing cooling section disposed on the bearing for the passage of the cooling refrigerant.
  • the compressor further includes a bearing coolant inlet, the bearing coolant inlet is in communication with the bearing cooling section, and is located on the motor housing corresponding to the position of the bearing.
  • the motor further comprises a stator
  • the stator is disposed in the motor housing, and is fixedly connected to the motor housing
  • the bearing assembly is two, and are respectively disposed on two sides of the stator, and the bearing coolant inlet corresponds to away from the first
  • the bearing assembly of the compression section is set.
  • the motor further includes a stator, a rotor and a bearing
  • the stator is disposed in the motor housing, and is fixedly connected to the motor housing
  • the cooling passage includes a first cooling section, and the first cooling section is located on an inner wall of the motor housing And the position is corresponding to the stator, the opening of the first cooling section faces the stator;
  • the rotor is located in the stator, the cooling channel further comprises a second cooling section, the second cooling section comprises a gap between the rotor and the stator; and the cooling channel further comprises a bearing disposed at the bearing a cooling section of the bearing through which the cooling refrigerant passes;
  • a refrigerant is introduced into the motor, at least a part of the refrigerant passes through the first cooling section and the second cooling section, and then flows out from the air return port, and at least another part of the refrigerant sequentially passes through the third cooling section, the second cooling section, and the bearing on the bearing remote from the air return port.
  • the third cooling section on the bearing near the air return port flows out from the air return port.
  • the compressor further comprises a second compression portion
  • the second compression portion is disposed at the second end of the motor
  • the first compression portion is for achieving one-stage compression
  • the second compression portion is for achieving secondary compression
  • the first compression portion further comprises a first impeller
  • the air return port is obliquely disposed, and the inclination angle enables the return air direction to follow the flow direction of the airflow in the first impeller.
  • an air conditioner including a compressor having a compressor as described above is provided.
  • the compressor of the present disclosure by providing a return air port on the first diffuser, the return air of the motor after cooling is passed through the air return port into the first compression portion, so that the built-in exhaust of the motor can be realized.
  • a return air pipe outside the motor which saves the external space, avoids the problem of increasing the overall structural complexity and high cost caused by the external motor return pipe, and avoids the potential hidden danger points caused by the increase of the connecting pipe, affecting the whole Reliability issues.
  • FIG. 1 is a schematic structural view of a prior art motor connected to a return air structure through an external motor return air pipe;
  • FIG. 2 is a cross-sectional structural view of a compressor according to the present disclosure
  • FIG. 3 is a cross-sectional structural view of a first diffuser of a compressor according to the present disclosure
  • FIG. 4 is a side elevational view showing the first diffuser of the compressor according to the present disclosure
  • Figure 5 is a front elevational view showing the first diffuser of the compressor according to the present disclosure
  • FIG. 6 is a schematic perspective view of a first diffuser of a compressor according to the present disclosure.
  • first connection point 1', first connection point; 2', motor return air pipe; 3', first fixed bracket; 4', second fixed bracket; 5', second connection point;
  • Motor housing 2. First housing; 3. First impeller; 4. First diffuser; 5. Return air inlet; 6. Stator; 10. Rotor; a diffuser; 13, a second impeller; 14, a second casing; 15, a bearing; 71, a first cooling section; 72, a second cooling section; 73, a bearing cooling section; 81, a motor coolant inlet; Bearing coolant inlet.
  • the compressor includes a motor and a first compression portion
  • the motor includes a motor housing 1 and a cooling passage disposed in the motor housing 1.
  • the first compression portion is disposed at the first end of the motor, and the first compression portion includes a first housing 2, a first diffuser 4 connected to the first housing 2, and the first diffuser 4 is provided with a return air inlet 5
  • the cooling passage communicates with the first compression portion through the air return port 5.
  • the return air for cooling the motor enters the first compression portion through the air return port 5, so that the built-in exhaust of the motor can be realized without installing a return air pipe outside the motor.
  • the utility model saves the external space, avoids the problem of increasing the overall structural complexity and high cost caused by the external motor return air pipe, and avoids the problem that the potential hidden danger points are increased due to the increase of the connecting pipelines, which affects the overall reliability.
  • the first compression portion further includes a first impeller 3, and the first impeller 3 is disposed in the first casing 2, and compression of the gas is achieved by the rotation of the first impeller 3.
  • the motor winding temperature is generally 30 ° C during the cooling process.
  • the motor cavity gas is generally only 20 ° C.
  • the low temperature of the gas in the motor cavity is a very good source of cold.
  • the gas after cooling the motor is discharged into the first compression portion through the built-in air return port 5, so that the cold source can be reused, and the gas entering the first compression portion reduces the air outlet of the first impeller 3 in the first compression portion.
  • the temperature of the gas effectively reduces the airflow noise; on the other hand, due to the decrease of the gas temperature, the power consumption in the subsequent gas compression is reduced, which is conducive to energy conservation.
  • the gas density in the compression chamber of the first compression portion increases, the number of gas molecules increases, and collision between gas molecules can be increased.
  • collision noise reduction which can reduce the noise generated when the compressor works.
  • the structure can be applied to any compressor that uses a refrigerant cooling motor or a compressor that uses a refrigerant to lubricate the bearing, and is particularly suitable for a two-stage double-headed impeller-free oil-free centrifugal compressor.
  • the compressor further includes a second compression portion, and the second compression portion is disposed at the second end of the motor.
  • the second compression unit is connected to the first compression unit, and the exhaust gas compressed by the first compression unit can enter the second compression unit, and is compressed again in the second compression unit and then discharged.
  • the motor further includes a stator 6, a rotating shaft and a rotor 10.
  • the stator 6 is disposed in the motor housing 1 and is fixed to the inner wall of the motor housing 1.
  • the cooling passage includes a first cooling section 71 which is provided on the inner wall of the motor housing 1 at a position corresponding to the stator 6, and the opening of the first cooling section 71 faces the stator 6.
  • the first cooling section 71 is for passing the refrigerant to enable the refrigerant to cool and cool the stator 6.
  • the first cooling section 71 is a spiral section that spirals in the axial direction of the stator 6.
  • the spiral extension of the first cooling section 71 can effectively increase the length, area and time of contact between the refrigerant and the stator, thereby achieving sufficient cooling of the stator 6.
  • the compressor further includes a motor coolant inlet 81, and the motor coolant inlet 81 is in communication with the first cooling section 71, and is located on the motor housing 1 corresponding to the position of the stator 6 to pass through the cooling passage. Into the refrigerant.
  • the rotating shaft is rotatably disposed in the motor housing 1 and is coupled to the motor housing 1 through a bearing assembly.
  • the bearing assembly is used to support the rotating shaft so that the rotating shaft can be rotated.
  • the bearing assembly includes the mounting plate 11 and the bearing 15.
  • the mounting plate 11 is used for mounting and supporting the bearing 15, and the mounting plate 11 is fixedly disposed in the motor housing 1.
  • the bearing 15 is mounted on the mounting plate 11, and the bearing 15 may be a deep groove ball bearing, a tapered roller bearing or the like depending on the force.
  • the bearing 15 can be a refrigerant lubricated bearing, which can be a sliding bearing, a rolling bearing, a magnetic suspension bearing or a refrigerant lubricated bearing, which creates an oil-free environment for the entire compressor, and the gas of each component enters the mainstream gas. It does not cause pollution and heat transfer.
  • the bearing 15 is a refrigerant-lubricated bearing provided with a bearing cooling section 73 penetrating in the axial direction of the bearing 15, which is used for the passage of cooling and lubricating refrigerant.
  • the cooling passage includes the bearing cooling section 73.
  • bearing cooling sections 73 may be plural as needed, and are disposed at intervals in the circumferential direction of the bearing 15.
  • the bearing assembly is two and spaced apart, and the stator 6 is located between the two bearing assemblies.
  • the shaft passes through two bearing assemblies.
  • the refrigerant-lubricated bearing of the two bearing assemblies has a bearing cooling section 73 in the middle, through which the refrigerant gas can take away the heat generated by the bearing working process, wherein the refrigerant-lubricated bearing away from the first compression part is the main bearing of the compressor. That is, the bearing bears both the radial force of the rotor shaft system and the axial force of the rotor shaft system, and the refrigerant lubrication bearing close to the first compression portion is the secondary bearing of the compressor, and only bears the radial force of the rotor shaft system. . Therefore, from the working principle, the main bearing generates more heat than the secondary bearing.
  • the compressor further includes a bearing coolant inlet 82 that communicates with the bearing cooling section 73 and is located on the motor housing 1 corresponding to the bearing 15 for the cooling refrigerant of the bearing to enter.
  • the bearing coolant inlet 82 is disposed corresponding to the bearing assembly away from the first compression portion, away from the first
  • the bearing assembly of a compression portion is a main bearing, and the bearing coolant inlet 82 is provided corresponding to it to ensure a cooling effect.
  • the rotor 10 is disposed on the rotating shaft and rotates with the rotating shaft.
  • the rotor 10 is located between two bearing assemblies. There is a gap between the outer diameter of the rotor 10 and the inner diameter of the stator 6, which is the second cooling section 72 of the cooling passage.
  • the first diffuser 4 of the first compression portion is connected to the motor housing 1, and the first housing 2 of the first compression portion is connected to the motor housing 1.
  • the first impeller 3 is located at the first end of the motor and is disposed within the first housing 2. Specifically, the first impeller 3 is coupled to the rotating shaft and is rotatable with the rotating shaft. The first impeller 3 discharges the compressed gas into the volute of the first casing 2 through the air outlet.
  • the cooling air return of the motor is communicated with the air outlet of the first impeller 3, and the return air gas directly enters the first compression portion, and the compressed gas is directly compressed.
  • the internal low-temperature gas cooling of the motor can be reused, the exhaust noise can be reduced, and the external motor return line connection can be omitted, so that the system is simple and low-cost, so that the entire centrifugal compressor can obtain higher cost performance.
  • the plurality of air return ports 5 on the first diffuser 4 may be disposed at intervals along the circumferential direction of the first diffuser 4, for example, a plurality of air return ports 5 are sequentially spaced apart on the first circumference, wherein the first circumference The center of the circle is located on the axis of rotation of the motor.
  • the air return ports 5 are evenly spaced on the first circumference, and the lines connecting the centers of the two adjacent air return ports 5 and the center of the first circumference form a third angle ⁇ , the third The angle ⁇ ranges from 12° to 30°.
  • the air return ports 5 are evenly spaced to meet the motor exhaust demand while simultaneously making the first compression portion uniformly intake, and the number of the air return ports 5 can be determined according to the intake air amount.
  • the value of the third angle mainly considers the flow rate of the return air flow and the uniformity of the mixing and the processability of the processing. The smaller the angle, the more the number of circumferential return ports is, the easier it is to mix with the main air flow, but the larger the processing volume ,vice versa.
  • the air return port 5 extends obliquely, i.e., the center line of the air return port 5 has an angle with the axis of the rotating shaft (i.e., the axis of rotation of the motor).
  • the end of the air return port 5 near the motor is the first end
  • the end of the air return port 5 near the first compression portion is the second end
  • the connection between the first end and the second end of the air return port 5 is the first connection.
  • the first line has a first angle ⁇ between the vertical plane of the motor axis of rotation (the vertical plane perpendicular to the axis of rotation in FIG. 4).
  • the distance between the first end of the air return port 5 and the axis of rotation is smaller than the distance between the second end of the air return port 5 and the axis of rotation.
  • the first angle ⁇ ranges from 15° to 35°.
  • the value of the first angle ⁇ mainly considers the airflow mixing performance and the return hole processing processability. If the angle is too small, the smaller the interference of the return air to the main airflow, the better the performance, but the processing technique is poor, and vice versa.
  • the first connection line of each air return port 5 has a second angle ⁇ between the motor rotation axis and the plane determined by the midpoint of the first connection line.
  • the projection length of the first end of the air return port 5 from the rotation axis in the vertical plane of the rotation axis is smaller than the projection length of the distance between the second end of the air return port 5 and the rotation axis in the vertical plane of the rotation axis.
  • the second angle ⁇ ranges from 55° to 75°.
  • the value of the second angle ⁇ is mainly selected by considering the flow angle of the main air flow, and the angle range can make the flow angle of the return air flow substantially coincide with the flow angle of the main air flow.
  • the air inlet 5 and the air outlet of the first impeller 3 may be in direct communication or indirect communication.
  • the air outlet 5 directly communicates with the volute of the first compression portion.
  • the respective angles formed by the air return port 5 and other reference lines or reference surfaces are set in the spiral direction of the air flow formed by the air return port 5 (clockwise or counterclockwise direction of the motor rotation) and the direction of rotation of the motor. The same settings are made.
  • the compressor is a centrifugal compressor
  • the first compression portion further includes a first impeller 3
  • the return air port 5 is inclined
  • the inclination angle enables the return air direction to follow the air flow in the first impeller 3.
  • the flow direction is such that the flow of air flowing out from the second end of the air return port 5 is consistent with the direction of the air flow at the corresponding position in the first impeller 3, thereby reducing the interference and impact of the cooling return air on the impeller.
  • the second compression portion includes a second housing 14, a second impeller 13 disposed in the second housing 14, and a second diffuser 12 coupled to the second housing 14.
  • the second diffuser 12 is coupled to the second end of the motor housing 1.
  • the second housing 14 is coupled to the second diffuser 12.
  • the second impeller 13 is disposed in the second housing 14 and is coupled to the second end of the rotating shaft and rotates with the rotating shaft. The gas discharged from the first compression portion enters the second compression portion to be compressed again to meet the compression demand.
  • the motor returning structure of the two-stage double-headed impeller-free oil-free centrifugal compressor fully utilizes the advantages of the refrigerant-lubricated bearing, and in combination with the motor cooling temperature control state, the air-return port 5 is built in the diffuser of the previous stage ( In the present embodiment, on the first diffuser 4), the main bearing (the bearing away from the first diffuser 4) is mixed with the cooling gas of the motor and passed through the secondary bearing (the bearing close to the first diffuser 4). It is fully mixed with the main airflow of the first-stage compression section to increase the density of the mainstream gas in the front stage, reduce the temperature, and effectively reduce the effect of airflow noise.
  • the compression power consumption of the next stage will be reduced, thereby improving the compressor. efficiency.
  • the external connection circuit of the motor is omitted, the leakage point of the system is reduced, and the purpose of improving the cost performance of the compressor is achieved.
  • the motor return air structure as described above combines the control of the motor cooling, that is, the temperature of the gas after the motor is cooled is lower than the temperature of the compressed gas of the previous stage, so that when the return gas of the motor is mixed with the mainstream gas discharged from the impeller of the previous stage, There is a cooling trend to achieve noise reduction.
  • the return air temperature of the motor is generally only 20 ° C. This temperature is very advantageous for the efficient operation of the motor. Therefore, according to the prior art motor return air temperature level, the motor of the present embodiment is implemented. The structure is completely feasible.
  • an air conditioner including a compressor having a compressor as described above is provided.
  • the compressor of the air conditioner is in the diffuser of the first stage compression section (ie, the first diffuser 4 in this embodiment), near the outlet side of the first impeller hub (ie, the outlet of the first impeller 3), and the circumference
  • a plurality of inclined channels ie, the air return port 5 are provided, so that the motor is reinstated and built in, which reduces the external return air line and reduces the hidden danger point.
  • the size of these channels is determined by the amount of return air and the flow rate of the motor.
  • the cooling passage of the motor includes a plurality of portions such as a first cooling section 71, a second cooling section 72, a bearing cooling section 73, and a connecting portion therebetween.
  • a spiral cooling channel between the stator and the motor housing 1 there is a spiral cooling channel between the stator and the motor housing 1, and the spiral cooling channel is the first cooling section 71.
  • the air gap passage between the stator and the rotor is the second cooling section 72.
  • the cooling and lubricating passage provided on the refrigerant-lubricated bearing is the bearing cooling section 73.
  • a motor coolant inlet 81 and a bearing coolant inlet 82 are provided in the motor housing 1 for introducing refrigerant into the cooling passage.
  • the motor coolant inlet 81 is located at one side of the stator
  • the bearing coolant inlet 82 is located at a position corresponding to the main bearing of the motor housing.
  • the refrigerant liquid entering from the motor coolant inlet 81 first flows through the first cooling section 71 between the stator 6 and the motor casing 1 in a spiral manner, taking away the heat of the stator 6 and changing The gas is then passed to the chamber at the right end of the stator 6 (the right end in Figure 2).
  • the bearing cooling section on the bearing (the bearing away from the return port 5) is lubricated by the main refrigerant. 73.
  • the gas enters into the right end chamber of the stator 6 and mixes with the gas after cooling the stator 6 of the motor.
  • the gas flows in a right-to-left direction (from right to left in Fig. 2) through an air gap between the stator 6 and the rotor 10 (i.e., the second cooling section 72) to the left end of the stator (left end in Fig. 2)
  • the chamber takes away the heat of the rotor 10, and then enters the bearing cooling section 73 of the secondary refrigerant lubricated bearing (the bearing close to the return port 5), takes away the secondary bearing heat, and then enters the first diffuser 4 and the secondary refrigerant lubricated bearing.
  • the passage formed by the mounting plate 11 is finally mixed with the main airflow in the first compression portion through the air return port 5 provided in the first diffuser to reduce the temperature of the main airflow, and then introduced into the right end of FIG. 2 through an external pipe or other passage.
  • the second compression section In the second compression section.
  • this built-in return air structure fully exploits the advantages of the refrigerant-lubricated bearing, and combines the motor cooling temperature control state by incorporating the air return port 5 in
  • the main bearing cooling gas is mixed with the motor cooling gas and passed through the secondary bearing to be fully mixed with the primary airflow of the previous stage to increase the density of the pre-stage mainstream gas, lower the temperature, and effectively reduce the airflow noise.
  • the compression power consumption of the next stage will be reduced, thereby improving the energy efficiency of the compressor.
  • the external connection circuit of the external motor is omitted, and the leakage point of the system is reduced, thereby achieving the purpose of improving the cost performance of the compressor.
  • the low-temperature gas cooling capacity of the motor cavity is reused, and the comprehensive utilization rate is high.
  • the low-temperature gas is mixed with the pneumatic flow channel gas, and the airflow density is increased, so that the sound wave consumes sound energy between the high-density molecules, reduces the airflow noise, and passes the low-temperature gas and the pneumatic flow.
  • the gas mixing makes it effective to reduce the inlet temperature of the lower impeller, reduce the compressor, and improve the energy efficiency of the compressor.
  • the internal compressor return line is made simple, so that the external pipeline of the whole compressor and unit is simple, reducing noise, improving efficiency, cooling the bearing, optimizing the system piping, and reducing Both the leak point and the reliability of the improvement can produce good results.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention concerne un compresseur et un climatiseur comprenant celui-ci. Le compresseur comprend : un moteur, comprenant un carter de moteur (1) et un canal de refroidissement disposé dans le carter de moteur (1) ; et une première partie de compression disposée au niveau d'une première extrémité du moteur, la première partie de compression comprenant un premier carter (2) et un premier diffuseur (4) relié au premier carter (2), le premier diffuseur (4) étant pourvu d'un orifice de retour d'air (5), et le canal de refroidissement étant en communication avec la première partie de compression au moyen de l'orifice de retour d'air (5). Le compresseur permet de réduire les conduits de retour d'air externes et de réduire les points de fuite.
PCT/CN2017/119425 2017-10-16 2017-12-28 Compresseur et climatiseur comprenant celui-ci WO2019075921A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201710962857.5 2017-10-16
CN201710962857.5A CN107664143B (zh) 2017-10-16 2017-10-16 压缩机及具有其的空调器

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WO2019075921A1 true WO2019075921A1 (fr) 2019-04-25

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KR102545557B1 (ko) * 2018-06-12 2023-06-21 엘지전자 주식회사 원심 압축기
JP7204524B2 (ja) 2019-02-25 2023-01-16 三菱重工コンプレッサ株式会社 圧縮機
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CN112983848B (zh) * 2021-02-04 2023-02-10 北京稳力科技有限公司 一种燃料电池电堆及供气装置
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CN115405536A (zh) * 2022-10-31 2022-11-29 季华实验室 一种磁悬浮双吸式离心压缩机
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