Motor cooling system of compressor

Abstract

A motor cooling system of a compressor comprises a motor, a cooler and a communication pipeline. The motor comprises a shell, an accommodating space, a bearing seat group, a motor stator and a motor rotor. The containing space is formed on the inner side of the shell and penetrates through the two ends of the shell. The bearing seat group is connected with the end parts of the shell. The motor stator is located in the shell. The motor rotor penetrates through the accommodating space, is adjacent to the motor stator and is used for rotating relative to the motor stator. The cooler is located outside the motor. The communication pipeline comprises a first pipeline and a second pipeline. The first pipeline and the second pipeline are respectively arranged between the motor and the cooler and are respectively communicated with the cooler and the accommodating space. The first pipeline enables airflow in the containing space to flow into the cooler, and the second pipeline enables airflow passing through the cooler to flow into the containing space, so that a circulating closed loop is formed. Thus, through the above structure, flow channel blockage can be reduced, heat energy can be effectively taken away, and the service life of a motor bearing is further prolonged.

Description

Technical Field

[0001] The utility model relates to a cooling system, in particular to a motor cooling system of a compressor. Background Art

[0002] Generally speaking, the cooling mechanism of traditional air compressors initially includes a closed internal circulation design or a split flow channel design. An air compressor with a closed internal circulation design directly forms staggered gas flow channels and liquid flow channels inside its motor. However, the gas flow channels and liquid flow channels often become blocked, thereby increasing the risk of motor overheating and burning.

[0003] On the other hand, an air compressor with a split flow channel design includes a motor housing and a bearing seat assembly that are combined with each other. The cooling flow channel recessed on the motor housing and the cooling flow channel recessed on the bearing seat assembly will form a complete cooling flow channel only after they are closed with each other. However, since the motor housing and the bearing seat assembly have a joint surface with each other, there is a risk that the working fluid in the cooling flow channel will leak from the joint surface, thereby causing damage to the air compressor.

[0004] It can be seen that the above technology still has inconveniences and defects, and needs to be further improved. Therefore, how to effectively solve the above inconveniences and defects is one of the current important research and development topics, and has also become a goal that urgently needs to be improved in the current related fields. Utility Model Content

[0005] The utility model provides a motor cooling system for a compressor, which is used to solve the difficulties mentioned in the above prior art.

[0006] According to one embodiment of the utility model, a motor cooling system of a compressor includes a motor, a cooler and a connecting pipeline. The motor includes a shell, a accommodating space, a bearing seat assembly, a motor stator and a motor rotor. The accommodating space is formed on the inner side of the shell and passes through the two ends of the shell. The bearing seat assembly is respectively connected to these ends of the shell. The motor stator is arranged in the shell. The motor rotor passes through the accommodating space and is adjacent to the motor stator for rotating relative to the motor stator. The cooler is located outside the motor. The connecting pipeline includes a first pipeline and at least one second pipeline. The first pipeline and the second pipeline are respectively arranged between the motor and the cooler, and are respectively connected to the accommodating space and the cooler. The first pipeline is for the airflow in the accommodating space to flow to the cooler. The second pipeline is for the airflow passing through the cooler to flow into the accommodating space to form a circulating closed loop.

[0007] According to one or more embodiments of the utility model, the motor cooling system of the compressor further includes a liquid cooling channel. The liquid cooling channel is arranged in the housing and surrounds the motor stator and the accommodating space, and the two opposite ends of the liquid cooling channel respectively have an inlet and an outlet. The connecting pipeline further includes a third pipeline and a fourth pipeline. The third pipeline is connected to the inlet of the liquid cooling channel so that the working liquid can flow into the liquid cooling channel. The fourth pipeline is connected to the outlet of the liquid cooling channel so that the working liquid can flow out of the liquid cooling channel. At least one of the third pipeline and the fourth pipeline is directly connected to the cooler.

[0008] According to one or more embodiments of the utility model, in the motor cooling system of the compressor, the liquid cooling channel is an integrated liquid cooling pipe. The integrated liquid cooling pipe is fixedly buried inside the housing and is spaced apart from the bearing seat assembly. The integrated liquid cooling pipe surrounds the motor rotor and the motor stator. The two ends of the integrated liquid cooling pipe are respectively connected to the third pipeline and the fourth pipeline.

[0009] According to one or more embodiments of the present invention, in the motor cooling system of the compressor, the integrated liquid cooling pipe is a plurality of U-shaped connecting pipes formed in one piece and extending in an axial direction around the motor stator.

[0010] According to one or more embodiments of the present invention, in the motor cooling system of the compressor, the integrated liquid cooling pipe is an integrally formed spiral pipe and extends in an axial direction to surround the motor stator.

[0011] According to one or more embodiments of the present invention, in the above compressor motor cooling system, the cooler includes a front-end heat exchange device connected to the first pipeline, the second pipeline, the third pipeline and the fourth pipeline respectively.

[0012] According to one or more embodiments of the present invention, in the motor cooling system of the compressor, the cooler is fixed to an outer surface of the motor relative to the accommodating space.

[0013] According to one or more embodiments of the present invention, in the motor cooling system of the compressor, there is a distance between the cooler and the motor.

[0014] According to one or more embodiments of the present invention, in the motor cooling system of the above-mentioned compressor, the accommodating space also includes a first accommodating space and a second accommodating space, the first accommodating space is formed on the inner side of the shell and passes through the two ends of the shell, the second accommodating space extends from the first accommodating space and is located in the bearing seat assembly, wherein the second accommodating space is connected to one end of the first pipeline.

[0015] According to one or more embodiments of the present invention, the motor cooling system of the compressor further comprises at least one fan element. The fan element is disposed in the second accommodation space of the bearing seat assembly, is coaxially sleeved on the motor rotor, and is disposed corresponding to the first pipeline to deliver the airflow in the accommodation space to the cooler through the first pipeline.

[0016] According to one or more embodiments of the present invention, in the motor cooling system of the compressor, one end of the second pipeline is connected to the accommodating space in the shell, and the end of the second pipeline is located near an end of the motor stator away from the first pipeline.

[0017] According to one or more embodiments of the present invention, in the motor cooling system of the compressor, the at least one second pipeline further comprises a plurality of second pipelines. One end of each second pipeline is connected to the accommodating space in the shell, and the ends of the second pipelines are respectively located near the two ends of the motor stator.

[0018] According to one or more embodiments of the present invention, the motor cooling system further comprises a rear heat exchange device, which is connected to the outlet of the liquid cooling channel through a fourth pipeline and to the cooler through a fifth pipeline.

[0019] According to one or more embodiments of the present invention, in the motor cooling system of the above-mentioned compressor, the rear-end heat exchange device is used to deliver the working liquid into the liquid cooling channel in the motor through the third pipeline, deliver the working liquid in the liquid cooling channel into the cooler through the fourth pipeline, and return the working liquid in the cooler to the rear-end heat exchange device through the fifth pipeline.

[0020] According to one or more embodiments of the utility model, in the motor cooling system of the above-mentioned compressor, the rear-end heat exchange device is used to send the working fluid into the cooler through the fifth pipeline, send the working fluid in the cooler into the liquid cooling channel in the motor through the third pipeline, and send the working fluid in the liquid cooling channel back to the rear-end heat exchange device through the fourth pipeline.

[0021] Thus, through the structure of the above embodiment, the motor cooling system of the compressor of the utility model is to immediately cool the temperature of the air flow in the accommodation space through a cooler arranged outside the motor, and the air flow forms a circulating closed loop to reduce the occurrence of flow channel blockage, and effectively take away the heat energy generated by the accommodation space and the motor rotor, thereby extending the life of the motor bearing; in addition, the utility model further uses the liquid cooling flow channel arranged in the shell to take away the heat energy generated by the shell and the motor stator using the working liquid, and further exchanges heat with the air flow in the cooler and reduces the air flow temperature, and finally reduces the temperature of the working liquid through the rear end heat exchange device, completely takes away the heat in the motor, and achieves the effect of efficient motor cooling. The motor cooling system of the compressor of the utility model can not only modify its heat exchange efficiency according to the on-site environment, but also quickly and effectively take away the heat energy in the motor, thereby reducing the risk of the motor overheating and burning.

[0022] The above description is only used to illustrate the problems to be solved by the present invention, the technical means to solve the problems, and the effects produced, etc. The specific details of the present invention will be described in detail in the following implementation methods and related drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to make the above and other purposes, features, advantages and embodiments of the present invention more clearly understood, the attached drawings are described as follows:

[0024] Figure 1A A side view schematic diagram of a motor cooling system for a compressor according to an embodiment of the utility model and a schematic diagram of its use and operation;

[0025] Figure 1B A side view schematic diagram of a motor cooling system for a compressor according to an embodiment of the utility model and a schematic diagram of its use and operation;

[0026] Figure 2 for Figure 1A A cross-sectional view of a motor cooling system of a compressor;

[0027] Figure 3A A three-dimensional diagram of an integrated liquid cooling pipe of a motor cooling system of a compressor according to an embodiment of the utility model;

[0028] Figure 3B A three-dimensional diagram of an integrated liquid cooling pipe of a motor cooling system of a compressor according to another embodiment of the utility model;

[0029] Figure 4A A side view schematic diagram of a motor cooling system for a compressor according to an embodiment of the utility model and a schematic diagram of its use and operation;

[0030] Figure 4B A side view schematic diagram of a motor cooling system for a compressor according to an embodiment of the utility model and a schematic diagram of its use and operation.

[0031]

Explanation of symbols

[0032] 10,11: Compressor motor cooling system

[0033] 100: Motor

[0034] 110: Shell

[0035] 111: Outer surface

[0036] 120: Accommodation space

[0037] 121: first accommodation space

[0038] 122: Second accommodating space

[0039] 130: Bearing seat assembly

[0040] 131:Front seat body

[0041] 132: Rear seat

[0042] 133: Back cover

[0043] 140: Motor stator

[0044] 150: Motor rotor

[0045] 160: Fan element

[0046] 200,200': Liquid cooling channel

[0047] 210,210': Integrated liquid cooling tube

[0048] 211:S Section

[0049] 220,220',230,230': end

[0050] 300: Cooler

[0051] 400: Connecting pipeline

[0052] 410: First pipeline

[0053] 420: Second pipeline

[0054] 430: Third pipeline

[0055] 440: The fourth pipeline

[0056] 450: Fifth pipeline

[0057] 500: rear heat exchange device

[0058] A1, A2: Solid arrow

[0059] D1,D2,D3: dotted arrows

[0060] L: Axial

[0061] G: Distance

[0062] R: Radial DETAILED DESCRIPTION

[0063] The following will disclose multiple embodiments of the utility model with the accompanying drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the utility model. In other words, in each embodiment of the utility model, the practical details are not necessary. In addition, in order to simplify the drawings, some conventional structures and elements will be depicted in a simple schematic manner in the drawings.

[0064] Figure 1A It is a side view of a motor cooling system 10 for a compressor according to an embodiment of the present invention and a schematic diagram of its operation. Figure 1B It is a side view of a motor cooling system 10 for a compressor according to an embodiment of the present invention and a schematic diagram of its operation. Figure 2 for Figure 1A A cross-sectional view of a motor cooling system 10 for a compressor. Figure 1A and Figure 2In the present embodiment, the motor cooling system 10 of the compressor includes a motor 100, a cooler 300, at least one fan element 160 and a connecting pipeline 400. The motor 100 includes a housing 110, a receiving space 120, a bearing seat assembly 130, a motor stator 140 and a motor rotor 150. The receiving space 120 is formed on the inner side of the housing 110 and the bearing seat assembly 130, and the receiving space 120 includes a first receiving space 121 and a second receiving space 122 connected to each other. The first receiving space 121 is formed on the inner side of the housing 110 and penetrates the two ends of the housing 110. The bearing seat assembly 130 is respectively connected to the two ends of the housing 110, and the second receiving space 122 extends from the first receiving space 121 and is located in the bearing seat assembly 130. More specifically, the long axis of the housing 110 (reference axis L) and the long axis of the first accommodation space 121 (reference axis L) are parallel to each other, however, the present invention is not limited thereto. The bearing seat assembly 130 is connected to the housing 110. The motor stator 140 is disposed on the housing 110. The motor rotor 150 passes through the first accommodation space 121 and is adjacent to the motor stator 140, and is rotatably disposed on the bearing seat assembly 130 for rotating relative to the motor stator 140. The cooler 300 is located outside the motor 100. The connecting pipeline 400 includes a first pipeline 410 and a second pipeline 420. The first pipeline 410 and the second pipeline 420 are respectively disposed between the motor 100 and the cooler 300. More specifically, two opposite ends of the first pipeline 410 are respectively connected to the second accommodation space 122 of the accommodation space 120 and the cooler 300. Two opposite ends of the second pipeline 420 are connected to the first accommodation space 121 of the accommodation space 120 and the cooler 300, respectively, wherein the second pipeline 420 is located near an end of the motor stator 140 away from the first pipeline 410. The fan element 160 is located in the second accommodation space 122 of the bearing seat assembly 130, coaxially sleeved on the motor rotor 150, and facing the first pipeline 410. Therefore, the motor 100, the cooler 300, the fan element 160 and the connecting pipeline 400 together form a closed circulation loop.

[0065] Thus, when the motor rotor 150 rotates relative to the motor stator 140 about the axial direction L in the first accommodation space 121, the fan element 160 generates airflow (see solid arrow A1), and the airflow sends the heat energy in the second accommodation space 122 and the motor rotor 150 into the cooler 300 through the first pipeline 410. After the airflow passes through the cooler 300 and receives heat exchange from the cooler 300, the airflow (see solid arrow A2) returns to the first accommodation space 121 again through the second pipeline 420, thereby removing most of the heat energy on the motor 100 and the motor rotor 150.

[0066] More specifically, in this embodiment, the bearing seat assembly 130 includes a front seat body 131, a rear seat body 132 and a rear cover 133, the motor 100 is disposed between the front seat body 131 and the rear seat body 132, and the rear cover 133 covers a side of the rear seat body 132 opposite to the front seat body 131, so that the rear seat body 132 is disposed between the front seat body 131 and the rear cover 133, the first accommodation space 121 is connected to the front seat body 131 and the rear seat body 132 respectively, and the rear seat body 132 accommodates the fan element 160 therein. The first pipeline 410 and the second pipeline 420 are connected to the motor 100 by pipeline connectors respectively. Among them, one end of the first pipeline 410 is connected to the second accommodation space 122 in the rear seat body 132 and faces the fan element 160, and one end of the second pipeline 420 is connected to the first accommodation space 121 in the housing 110. However, the present invention is not limited thereto. In other embodiments, the first pipeline 410 and the second pipeline 420 may also pass through the radial direction R of the motor 100 and extend into the motor 100 , and communicate with the second accommodating space 122 and the first accommodating space 121 , respectively.

[0067] The number of the fan element 160 is at least one, and the more the number of the fan elements, the greater the pressure of the airflow (refer to the solid arrow A1) sent out of the second accommodating space 122. In addition, the type of the fan element 160 is a centrifugal fan or an axial flow fan. When the fan element 160 is a centrifugal fan, the first pipeline 410 is arranged along the radial direction R of the motor 100 and corresponds to the fan element 160; when the fan element 160 is an axial flow fan, the first pipeline 410 is arranged along the axial direction L of the motor 100 and corresponds to the fan element 160. In addition, the type of the compressor can be a centrifugal compressor, a scroll compressor or a screw compressor.

[0068] In addition, in this embodiment, for example, the cooler 300 is not fixedly connected to the motor 100, that is, there is a distance G between the cooler 300 and the housing 110; that is, the cooler 300 is disposed near the motor 100 through an external mounting structure (e.g., a mounting frame or a mounting plate), however, the utility model is not limited thereto. In other embodiments, the cooler 300 can be disposed on the outer periphery of the motor 100 (e.g., a mounting frame or a mounting plate) by direct or indirect mounting. Figure 4A and Figure 4B Specifically, the cooler 300 is fixed to the outer surface 111 of the housing 110 relative to the first accommodating space 121. In addition, the second pipeline 420 does not have only a single one. In other embodiments, Figure 1B and Figure 4B As shown, the number of the second pipelines 420 may also be a plurality of second pipelines 420 (eg, 2) arranged corresponding to each other. One end of each second pipeline 420 is connected to the first accommodation space 121 and is respectively located near the two ends of the motor stator 140 .

[0069] Furthermore, Figure 3A FIG. 2 is a three-dimensional diagram of an integrated liquid cooling tube 210 of a motor cooling system 10 for a compressor according to an embodiment of the present invention. Figures 1A to 3A The compressor motor cooling system 10 further includes a liquid cooling channel 200. The liquid cooling channel 200 is disposed on the housing 110 and surrounds the motor stator 140 and the first accommodation space 121. The two opposite ends of the liquid cooling channel 200 each have an inlet (reference symbol 220, Figure 3A ) and an outlet (reference end 230, Figure 3A The connecting pipeline 400 further includes a third pipeline 430 and a fourth pipeline 440. The third pipeline 430 is disposed between the motor 100 and the cooler 300, and one end of the third pipeline 430 is connected to the inlet of the liquid cooling channel 200 (reference symbol 220, Figure 3A ), so that the working liquid flows into the liquid cooling channel 200 located in the housing 110. One end of the fourth pipeline 440 is connected to the outlet of the liquid cooling channel 200 (reference symbol 230, Figure 3A ) for the working liquid to flow out of the liquid cooling channel 200. The working liquid is pure water for cooling or a cooling water solution with antifreeze function, etc.

[0070] More specifically, in this embodiment, one end of the third pipeline 430 away from the liquid cooling channel 200 is directly connected to the cooler 300, and the other end is connected to the liquid cooling channel 200. One end of the fourth pipeline 440 away from the liquid cooling channel 200 is directly connected to a rear heat exchange device 500 outside the motor cooling system 10 of the compressor, and the other end is connected to the liquid cooling channel 200. The rear heat exchange device 500 is connected to the outlet of the liquid cooling channel 200 through the fourth pipeline 440 (reference symbol 230, Figure 3A ), and is directly connected to the cooler 300 through a fifth pipeline 450. Specifically, the rear heat exchange device 500 is used to send the working liquid into the cooler 300 through the fifth pipeline 450, send the working liquid in the cooler 300 into the liquid cooling channel 200 in the motor 100 through the third pipeline 430, and send the working liquid in the liquid cooling channel 200 back to the rear heat exchange device 500 through the fourth pipeline 440.

[0071] It should be understood that the working fluid passing through the cooler 300 can further help cool the airflow passing through the cooler 300 (refer to the solid arrow A1 ), thereby improving the heat exchange efficiency of the motor cooling system 10 of the compressor with respect to the motor rotor 150 .

[0072] The liquid cooling channel 200 is an integrated liquid cooling tube 210. The integrated liquid cooling tube 210 is fixedly buried inside the housing 110 and is spaced apart from the bearing seat assembly 130. The integrated liquid cooling tube 210 surrounds the first accommodating space 121, the motor rotor 150 and the motor stator 140. The two ends 220 and 230 of the integrated liquid cooling tube 210, i.e., the inlet and outlet of the liquid cooling channel 200, are connected to the third pipeline 430 and the fourth pipeline 440, respectively. The integrated liquid cooling tube 210 extends in a serpentine manner ( Figure 3A ), thereby surrounding the motor rotor 150 and the motor stator 140. The integrated liquid cooling pipe 210 is a plurality of U-shaped connecting pipes (reference numeral 211, Figure 3A ), and extends along an axial direction L around the motor stator 140 ( Figure 1A ). In other words, the integrated liquid cooling tube 210 includes a plurality of S portions 211, which are connected in sequence and are bent into a ring shape around the first accommodation space 121. For example, the integrated liquid cooling tube 210 is made of metal, such as stainless steel, aluminum, copper or zinc, and the housing 110 is made of metal, such as aluminum, copper or zinc. However, the present invention is not limited to the shape and material of the integrated liquid cooling tube 210. In other embodiments, different from Figure 3A The appearance of the liquid cooling channel 200, Figure 3B is a three-dimensional diagram of an integrated liquid cooling tube 210' according to another embodiment of the present invention. The integrated liquid cooling tube 210 may also be an integrally formed spiral tube or other similar shapes (such as Figure 3B As shown in Figure 3B As shown, the integrated liquid cooling tube 210' of the liquid cooling channel 200' is an integrally formed spiral tube. Therefore, the working liquid can enter the integrated liquid cooling tube 210' from one end 220' (i.e., the inlet) and leave the integrated liquid cooling tube 210' from the other end 230' (i.e., the outlet).

[0073] In this way, since part of the heat energy of the motor stator 140 will be transferred to the shell 110, when the working liquid in the third pipeline 430 (refer to the dotted arrow D1) is sent into the integrated liquid cooling tube 210 inside the shell 110 from one end 220 (i.e., the inlet) of the integrated liquid cooling tube 210, the working liquid can surround the first accommodating space 121 along the extension direction of the integrated liquid cooling tube 210, and send the heat energy on the shell 110 out of the shell 110 from the other end 230 (i.e., the outlet) of the integrated liquid cooling tube 210, so that the working liquid (refer to the dotted arrow D2) is sent from the fourth pipeline 440 to the rear-end heat exchange device 500 to receive heat exchange from the rear-end heat exchange device 500, thereby removing the heat energy of the motor 100 and the motor stator 140. The rear heat exchange device 500 then delivers the cooled working liquid (see dashed arrow D3 ) from the fifth pipeline 450 to the cooler 300 , so that the working liquid (see dashed arrow D1 ) gradually returns to the integrated liquid cooling pipe 210 inside the shell 110 .

[0074] In other embodiments, Figures 1A to 3A The working fluid in the motor takes away the heat energy of the motor stator 140, which can be more Figure 4A As shown, one end of the third pipeline 430 away from the liquid cooling channel 200 is directly connected to the rear heat exchange device 500, and the other end is connected to the inlet of the liquid cooling channel 200 (reference symbol 220, Figure 3A One end of the fourth pipeline 440 away from the liquid cooling channel 200 is directly connected to the cooler 300, and the other end is connected to the outlet of the liquid cooling channel 200 (reference symbol 230, Figure 3A ). The rear heat exchange device 500 is directly connected to the cooler 300 through the fifth pipeline 450. Since part of the heat energy of the motor stator 140 will be transferred to the shell 110, when the working liquid in the third pipeline 430 (refer to the dotted arrow D3) is sent into the integrated liquid cooling tube 210 inside the shell 110 from one end 220 (i.e., the inlet) of the integrated liquid cooling tube 210, the working liquid can surround the first accommodating space 121 along the extension direction of the integrated liquid cooling tube 210, and send the heat energy on the shell 110 out of the shell 110 from the other end 230 (i.e., the outlet) of the integrated liquid cooling tube 210, so that the working liquid (refer to the dotted arrow D1) is sent from the fourth pipeline 440 to the cooler 300 to receive heat exchange from the cooler 300, thereby removing the heat energy of the motor 100 and the motor stator 140. The cooler 300 then delivers the cooled working liquid (see dotted arrow D2) from the fifth pipeline 450 to the rear-end heat exchange device 500, so that the working liquid (see dotted arrow D3) returns to the integrated liquid cooling tube 210 inside the shell 110 along the third pipeline 430, completing the heat dissipation cycle of the working liquid.

[0075] More specifically, the integrated liquid cooling pipe 210 is only buried and located in the housing 110, not in the bearing seat assembly 130, that is, the integrated liquid cooling pipe 210 is spaced from the front seat body 131 and the rear seat body 132 of the bearing seat assembly 130. In this way, since the integrated liquid cooling pipe 210 does not need to flow through the front seat body 131 or the rear seat body 132 and does not need to be combined to form the above-mentioned liquid cooling channel 200, there is no risk of leakage of the working fluid in the housing 110 or the bearing seat assembly 130 during the cooling process, and there is no risk of leakage caused by mold wear or sand center deviation, thereby avoiding the occurrence of damage to the air compressor due to leakage of the working fluid.

[0076] In this embodiment, for example, the cooler 300 includes a front-end heat exchange device. The front-end heat exchange device is directly or indirectly connected to the first pipeline 410, the second pipeline 420, the third pipeline 430 and the fourth pipeline 440. The front-end heat exchange device is, for example, a refrigerant heat exchanger or an air-cooled condenser or other similar devices, however, the utility model is not limited thereto.

[0077] Figure 4A It is a side view of a motor cooling system 11 of a compressor according to an embodiment of the present invention and a schematic diagram of its operation. Figure 4B FIG. 1 is a side view of a motor cooling system 11 of a compressor according to an embodiment of the present invention and a schematic diagram of its operation. Figure 3A and Figure 4A The motor cooling system 11 of the compressor of the present embodiment is substantially the same as the motor cooling system 10 of the compressor described above, and is characterized in that the cooler 300 is directly fixed to the outer surface 111 of the housing 110 opposite to the first accommodation space 121. In addition, one end of the third pipeline 430 away from the liquid cooling channel 200 is directly connected to the rear heat exchange device 500, and the other end is connected to the inlet of the liquid cooling channel 200 (reference symbol 220, Figure 3A ), one end of the fourth pipeline 440 away from the liquid cooling channel 200 is directly connected to the cooler 300, and the other end is connected to the outlet of the liquid cooling channel 200 (reference symbol 230, Figure 3A ), the rear heat exchange device 500 is directly connected to the cooler 300 through the fifth pipeline 450. The rear heat exchange device 500 is used to send the working liquid into the liquid cooling channel 200 in the motor 100 through the third pipeline 430, send the working liquid in the liquid cooling channel 200 into the cooler 300 through the fourth pipeline 440, and send the working liquid in the cooler 300 back to the rear heat exchange device 500 through the fifth pipeline 450.

[0078] Therefore, when the working liquid (refer to the dotted arrow D1) is sent out of the shell 110 from the fourth pipeline 440 and sent to the cooler 300 to receive the heat exchange of the cooler 300, a part of the heat energy of the motor 100 and the motor stator 140 is removed and heat exchange is performed with the airflow (refer to the solid arrow A1); then, the cooler 300 sends the working liquid (refer to the dotted arrow D2) passing through the cooler 300 from the fifth pipeline 450 to the rear-end heat exchange device 500; after receiving the heat exchange of the rear-end heat exchange device 500, the working liquid (refer to the dotted arrow D3) returns from the third pipeline 430 to the integrated liquid cooling tube 210 inside the shell 110 to perform the above-mentioned heat dissipation work.

[0079] In addition, in other embodiments, Figure 4A The working fluid in the motor takes away the heat energy of the motor stator 140, which can be more Figures 1A to 3A As shown in FIG. 1 , one end of the third pipeline 430 away from the liquid cooling channel 200 is directly connected to the cooler 300, and the other end is connected to the inlet of the liquid cooling channel 200 (reference symbol 220, Figure 3A The cooler 300 is directly fixed to the outer surface 111 of the housing 110 opposite to the first accommodation space 121. One end of the fourth pipeline 440 away from the liquid cooling channel 200 is directly connected to the rear heat exchange device 500, and the other end is connected to the outlet of the liquid cooling channel 200 (reference symbol 230, Figure 3A ). The rear-end heat exchange device 500 is directly connected to the cooler 300 through the fifth pipeline 450. Since part of the heat energy of the motor stator 140 will be transferred to the shell 110, when the working liquid in the third pipeline 430 (refer to the dotted arrow D1) is sent into the integrated liquid cooling tube 210 inside the shell 110 from one end 220 (i.e., the inlet) of the integrated liquid cooling tube 210, the working liquid can surround the first accommodating space 121 along the extension direction of the integrated liquid cooling tube 210, and send the heat energy on the shell 110 out of the shell 110 from the other end 230 (i.e., the outlet) of the integrated liquid cooling tube 210, so that the working liquid (refer to the dotted arrow D2) is sent from the fourth pipeline 440 to the rear-end heat exchange device 500 to receive the heat exchange of the rear-end heat exchange device 500, thereby removing the heat energy of the motor 100 and the motor stator 140. The rear-end heat exchange device 500 then sends the cooled working liquid (refer to the dotted arrow D3) from the fifth pipeline 450 to the cooler 300 for further heat exchange, so that the working liquid (refer to the dotted arrow D1) can then return to the integrated liquid cooling tube 210 inside the shell 110 along the third pipeline 430, completing the heat dissipation cycle of the working liquid.

[0080] In addition, the second pipeline 420 has not only a single ( Figure 4A ), in other embodiments, such as Figure 4BAs shown, the number of the second pipelines 420 may also be a plurality of second pipelines 420 (e.g., 2) disposed opposite to each other. These second pipelines 420 are respectively located near the two ends of the motor stator 140, and one end of each second pipeline 420 is connected to the first accommodation space 121, and the other end is directly connected to the cooler 300.

[0081] Thus, through the structure of the above embodiment, the motor cooling system of the compressor of the utility model is to immediately cool the temperature of the air flow in the accommodation space through a cooler arranged outside the motor, and the air flow forms a circulating closed loop to reduce the occurrence of flow channel blockage, and effectively take away the heat energy generated by the accommodation space and the motor rotor, thereby extending the life of the motor bearing; in addition, the utility model further uses the liquid cooling flow channel arranged in the shell to take away the heat energy generated by the shell and the motor stator using the working liquid, and further exchanges heat with the air flow in the cooler and reduces the air flow temperature, and finally reduces the temperature of the working liquid through the rear end heat exchange device, completely takes away the heat in the motor, and achieves the effect of efficient motor cooling. The motor cooling system of the compressor of the utility model can not only modify its heat exchange efficiency according to the on-site environment, but also quickly and effectively take away the heat energy in the motor, thereby reducing the risk of the motor overheating and burning.

[0082] Finally, the above disclosed embodiments are not intended to limit the present invention. Anyone skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all of them can be protected by the present invention. Therefore, the scope of protection of the present invention shall be determined by the definition of the attached claims.

Claims

1. A motor cooling system for a compressor, characterized in that: Include: A motor, comprising a housing, a containing space, a bearing seat assembly, a motor stator and a motor rotor, wherein the containing space is formed inside the housing and passes through two ends of the housing, the bearing seat assembly is respectively connected to the two ends of the housing, the motor stator is arranged in the housing, and the motor rotor passes through the containing space and is adjacent to the motor stator for rotating relative to the motor stator; a cooler located outside the motor; as well as A connecting pipeline includes a first pipeline and at least one second pipeline. The first pipeline and the second pipeline are respectively arranged between the motor and the cooler, and respectively connect the accommodating space and the cooler. The first pipeline is used for the airflow in the accommodating space to flow to the cooler, and the second pipeline is used for the airflow passing through the cooler to flow into the accommodating space, so as to form a circulating closed loop.

2. The motor cooling system of the compressor according to claim 1, characterized in that: Also includes: A liquid cooling channel is disposed in the housing and surrounds the motor stator and the accommodating space, and two opposite ends of the liquid cooling channel respectively have an inlet and an outlet; as well as The connecting pipeline further includes a third pipeline and a fourth pipeline, the third pipeline is connected to the inlet of the liquid cooling channel to allow the working liquid to flow into the liquid cooling channel, and the fourth pipeline is connected to the outlet of the liquid cooling channel to allow the working liquid to flow out of the liquid cooling channel. At least one of the third pipeline and the fourth pipeline is directly connected to the cooler.

3. The motor cooling system of the compressor according to claim 2, characterized in that: The liquid cooling channel is an integrated liquid cooling tube, which is fixedly buried inside the shell and spaced apart from the bearing seat assembly. The integrated liquid cooling tube surrounds the motor rotor and the motor stator, and the two ends of the integrated liquid cooling tube are respectively connected to the third pipeline and the fourth pipeline.

4. The motor cooling system of the compressor according to claim 3, characterized in that: The integrated liquid cooling pipe is a plurality of U-shaped connecting pipes formed in one piece and extending in an axial direction to surround the motor stator.

5. The motor cooling system of the compressor according to claim 3, characterized in that: The integrated liquid cooling tube is an integrally formed spiral tube and extends axially to surround the motor stator.

6. The motor cooling system of the compressor according to claim 2, characterized in that: The cooler includes a front-end heat exchange device which is respectively connected to the first pipeline, the second pipeline, the third pipeline and the fourth pipeline.

7. The motor cooling system of the compressor according to claim 1, characterized in that: The cooler is fixed to an outer surface of the motor opposite to the accommodating space.

8. The motor cooling system of the compressor according to claim 1, characterized in that: There is a distance between the cooler and the motor.

9. The compressor motor cooling system according to claim 1, characterized in that: The accommodating space further includes a first accommodating space and a second accommodating space, wherein the first accommodating space is formed on the inner side of the shell and passes through the two end portions of the shell, and the second accommodating space extends from the first accommodating space and is located in the bearing seat assembly, wherein the second accommodating space is connected to one end of the first pipeline.

10. The compressor motor cooling system according to claim 9, characterized in that: Also includes: At least one fan element is arranged in the second accommodating space of the bearing seat assembly, is coaxially sleeved on the motor rotor, and is arranged corresponding to the first pipeline to send the airflow in the accommodating space into the cooler through the first pipeline.

11. The compressor motor cooling system according to claim 1, characterized in that: One end of the second pipeline is connected to the accommodating space in the shell, and the end of the second pipeline is located near an end of the motor stator away from the first pipeline.

12. The compressor motor cooling system according to claim 1, characterized in that: The at least one second pipeline includes a plurality of second pipelines, one end of each of the plurality of second pipelines is connected to the accommodating space in the shell, and the ends of the plurality of second pipelines are respectively located adjacent to the two end portions of the motor stator.

13. The compressor motor cooling system according to claim 2, characterized in that: Also includes: A rear end heat exchange device is connected to the outlet of the liquid cooling channel through the fourth pipeline and is connected to the cooler through a fifth pipeline.

14. The compressor motor cooling system according to claim 13, characterized in that: The rear-end heat exchange device is used to deliver the working liquid into the liquid cooling channel in the motor through the third pipeline, deliver the working liquid in the liquid cooling channel into the cooler through the fourth pipeline, and deliver the working liquid in the cooler back to the rear-end heat exchange device through the fifth pipeline.

15. The compressor motor cooling system according to claim 13, characterized in that: The rear-end heat exchange device is used to deliver the working liquid into the cooler through the fifth pipeline, deliver the working liquid in the cooler into the liquid cooling channel in the motor through the third pipeline, and deliver the working liquid in the liquid cooling channel back to the rear-end heat exchange device through the fourth pipeline.

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