Motor assembly, thermal management device and thermal management system

Abstract

The present application provides a motor assembly, which includes a housing, a core part, and at least one heat pipe; the housing includes a first housing part and a second housing part; the first housing part has a first cavity, and the second housing part has a second cavity; the core part includes a rotor and a stator; at least a part of the core part is received in the first cavity; the heat pipe has a pipe wall and a pipe cavity, a phase change medium is filled in the pipe cavity, and the pipe cavity is not connected to the first cavity and the second cavity; the heat pipe has a first part located in the first cavity and a second part located in the second cavity; at least a part of the first part is located between the stator and the first housing part; the housing is further provided with a coolant inlet and a coolant outlet; the coolant inlet is connected to the second cavity, and the coolant outlet is connected to the second cavity. The present application is beneficial to finally transfer the heat near the core part to the coolant, and has a good heat transfer effect.

Description

Technical Field

[0001] The present application relates to the technical field of thermal management, and in particular to an electric machine assembly, a thermal management device, and a thermal management system. Background Art

[0002] As a component of a compressor or other power equipment, some related technologies consider providing a cooling structure for the electric machine to dissipate the heat of the electric machine. For example, Figure 1 , the electric machine includes a housing 50 and a stator winding 60. The stator winding 60 is disposed inside the housing 50. The electric machine further includes a heat conducting part, wherein a first part of the heat conducting part is in contact with the stator winding 60, and a second part of the heat conducting part is connected to the housing 50. The heat absorbed by the first part can be conducted to the housing 50 through the second part and then conducted to the outside through the housing 50. A refrigerant is provided in the inner pipeline of the heat conducting part, so that the heat conduction can be accelerated through the phase change of the refrigerant and the flow in the pipeline.

[0003] However, in the related technology, the heat of the stator winding is finally dissipated to the external environment through the housing. This way of heat exchange is easily affected by the temperature of the housing and the temperature of the environment around the housing, and the housing has a poor heat dissipation effect on the electric machine. Therefore, the related technology needs to be improved. Summary of the Invention

[0004] The present application provides an electric machine assembly with a better heat transfer effect for the core part, a thermal management device having the electric machine assembly, and a thermal management system applying the thermal management device.

[0005] In a first aspect of the present application, an electric machine assembly is provided, including a housing, a core part, and at least one heat pipe;

[0006] The housing includes a first housing part and a second housing part; the first housing part has a first cavity, and the second housing part has a second cavity; the first cavity and the second cavity are not communicated; the core part includes a rotor and a stator circumferentially disposed around the rotor; at least a part of the core part is received in the first cavity;

[0007] The heat pipe has a pipe wall and a lumen, the pipe wall is located on the periphery of the lumen, a phase change medium is filled in the lumen, and the lumen is not connected to the first cavity and the second cavity; the heat pipe has a first part located in the first cavity and a second part located in the second cavity; at least a part of the first part is located between the stator and the first housing part;

[0008] The housing is further provided with a coolant inlet and a coolant outlet; the coolant inlet is communicated with the second cavity, and the coolant outlet is communicated with the second cavity.

[0009] The inner cavity of the heat pipe in this application is filled with a phase change medium. The first part of the heat pipe is conducive to absorbing the heat of the core body part in the first cavity, and the second part of the heat pipe is conducive to exchanging heat between the heat and the coolant in the second cavity, thereby facilitating the transfer of the heat near the core body part to the coolant ultimately, and the heat transfer effect is better.

[0010] In the second aspect of this application, a thermal management device is further provided. The thermal management device includes a scroll assembly, a rotating shaft, and the motor assembly described in the first aspect above; the scroll assembly includes a scroll housing, a moving scroll, and a stationary scroll; the moving scroll and the stationary scroll are both accommodated in the scroll housing;

[0011] The rotor is connected to the moving scroll through the rotating shaft; the moving scroll is movably arranged relative to the stationary scroll under the drive of the rotating shaft; the moving scroll and the stationary scroll cooperate to form a scroll chamber; the scroll housing is further provided with an air inlet and an air outlet respectively communicating with the scroll chamber; the air inlet communicates with the scroll chamber, and the air outlet communicates with the scroll chamber.

[0012] In the thermal management device of this application, the first part of its heat pipe is conducive to absorbing the heat near the core body part in the first cavity, and the second part of the heat pipe is conducive to exchanging heat between the heat and the coolant in the second cavity, thereby facilitating the transfer of the heat of the core body part to the coolant ultimately, and the heat transfer effect is better.

[0013] In the third aspect of this application, a thermal management system is further provided, including the thermal management device described in the second aspect above, a battery heat exchange device, a first pump, a first heat exchanger, a throttling device, and a second heat exchanger; the battery heat exchange device can provide heat for the vehicle battery;

[0014] The thermal management system includes a preheating mode. In the preheating mode, the air outlet of the thermal management device, the first heat exchanger, the throttling device, the second heat exchanger, and the air inlet of the thermal management device are connected to form a refrigerant circuit. The first heat exchanger is located between the air outlet of the thermal management device and the inlet of the throttling device, and the second heat exchanger is located between the outlet of the throttling device and the air inlet of the thermal management device; the coolant outlet of the thermal management device, the first pump, the battery heat exchange device, and the coolant inlet of the thermal management device are connected to form a coolant circuit.

[0015] In the preheating mode of the thermal management system of this application, the circulation of the coolant is conducive to bringing the heat of the motor core body part of the thermal management device to the battery heat exchange device, so that the battery heat exchange device can keep the battery warm, thereby effectively recycling the heat of the core body part, and is conducive to enhancing the performance of the preheating mode of the thermal management system.

[0016] The fourth aspect of the present application further provides a thermal management system, including the thermal management device described in the second aspect above, a first pump, a first heat exchanger, a throttling device, and a second heat exchanger; the second heat exchanger includes a non-communicating refrigerant flow channel and a coolant flow channel;

[0017] The thermal management system includes a heating mode. In the heating mode, the outlet of the thermal management device, the first heat exchanger, the throttling device, the refrigerant flow channel of the second heat exchanger, and the inlet of the thermal management device are connected to form a refrigerant circuit. The first heat exchanger is located between the outlet of the thermal management device and the inlet of the throttling device, and the second heat exchanger is located between the outlet of the throttling device and the inlet of the thermal management device; the coolant outlet of the thermal management device, the first pump, the coolant inlet of the thermal management device, and the coolant flow channel of the second heat exchanger are connected to form a coolant circuit.

[0018] In the heating mode of the thermal management system of the present application, the heat of the motor core part of the thermal management device is provided to the refrigerant flow channel through the coolant flow channel of the second heat exchanger by the circulating flow of the coolant. The refrigerant flow channel of the second heat exchanger can provide the heat to the first heat exchanger, and the first heat exchanger can provide the heat to other components or release it to the surrounding environment, which is beneficial to enhancing the performance of the heating mode of the thermal management system. Description of the Drawings

[0019] Figure 1 It is an exploded structural view of a motor in the related art;

[0020] Figure 2 It is a three-dimensional structural view of a motor assembly of the present application;

[0021] Figure 3 For the present application Figure 2 It is a cross-sectional structural view of the motor assembly in the present application;

[0022] Figure 4 For the present application Figure 2 It is a three-dimensional sectional structural view of the motor assembly in the present application;

[0023] Figure 5 For the present application Figure 2 It is another three-dimensional sectional structural view of the motor assembly in the present application;

[0024] Figure 6 For the present application Figure 2 It is yet another three-dimensional sectional structural view of the motor assembly in the present application;

[0025] Figure 7 It is a three-dimensional structural view of some components of the motor assembly of the present application;

[0026] Figure 8 Schematic diagram of the heat pipe structure of the motor assembly of the present application;

[0027] Figure 9 Schematic cross-sectional structure diagram of a heat management device of the present application;

[0028] Figure 10 Another schematic cross-sectional structure diagram of the heat management device of the present application;

[0029] Figure 11 Another schematic cross-sectional structure diagram of the heat management device of the present application;

[0030] Figure 12 Schematic connection diagram of a heat management system of the present application;

[0031] Figure 13 Another schematic connection diagram of the heat management system of the present application. Detailed implementation manners

[0032] The motor assembly, heat management device, and heat management system of the exemplary embodiments of the present application will be described in detail below with reference to the accompanying drawings. Without conflict, the features in the following embodiments and implementation manners can be supplemented or combined with each other.

[0033] The motor assembly of the present application can be used as a component of the heat management device, and the heat management device can be applied to the heat management system. The heat management system provided by the present application can be applied to products that require heat management, such as vehicles and ships. In some implementation manners, the motor assembly, heat management device, and heat management system of the present application can all be applied to electric vehicles.

[0034] As Figures 2 to 8 , a motor assembly 100 provided by the present application on the one hand includes a housing 11, a core part, and at least one heat pipe 13. The core part includes a rotor 15 and a stator 12 and other structures axially arranged around the rotor 15. When the motor assembly 100 is assembled with the vortex disk structure to form a heat management device, the heat management device can also include a rotating shaft 16 and the like.

[0035] The housing 11 includes a first housing part 81 and a second housing part 82. The first housing part 81 has a first cavity 111, and the second housing part 82 has a second cavity 112. The first cavity 111 and the second cavity 112 are not connected. The first housing part 81 and the second housing part 82 can be two independent housings with a gap therebetween or fixed together, or the first housing part 81 and the second housing part 82 can be two parts of an integral housing, such as the first housing part 81 and the second housing part 82 being integrally formed. The present application does not limit this.

[0036] In one implementation, the housing 11 includes a partition 110. The partition 110 can be a plate-like structure with a certain thickness and is located between the first housing portion 81 and the second housing portion 82. That is, the first housing portion 81 has an opening, and the partition 110 closes at least a part of the opening. The second housing portion 82 has an opening, and the partition 110 closes at least a part of the opening. The partition 110, the first housing portion 81, and the second housing portion 82 can be assembled and fixed into an integral structure. The first cavity 111 and the second cavity 112 are respectively located on different sides of the thickness direction of the partition 110. At least a part of the core portion is received in the first cavity 111. There is a sandwich layer between the outer periphery of the stator 12 and the inner wall surface of the housing 11, and this sandwich layer is a part of the first cavity 111. That is to say, the partition 110 divides the internal space of the housing 11 into two parts. One part is a receiving space for receiving structures such as the stator and the rotor, and the other receiving space can be used to accommodate the coolant.

[0037] The stator 12 can be located on the outer peripheral side of the rotor 15. A part of the rotating shaft 16 is fixed to the rotor 15. For example, the rotor 15 is located on the outer peripheral side of a part of the rotating shaft 16 and the rotor 15 is fixedly connected to the rotating shaft 16. The stator 12 is usually electrically connected to the controller. Specifically, the stator 12 can include a stator core and a coil winding wound around the stator core. By controlling the magnitude of the current applied to the coil winding, different intensities of excitation magnetic fields can be generated. The rotor 15 can be an iron core, which rotates under the action of the magnetic field force. The rotor 15 can then drive the rotating shaft 16 to rotate, so as to drive other components through the rotating shaft 16 to achieve related functions. The related structures and compositions of components such as the stator and the rotor are well-known to those skilled in the art, and the present application will not elaborate on them too much.

[0038] A heat pipe is an efficient heat transfer element. The heat pipe 13 provided in this application has a pipe wall 131 and a pipe cavity 132. The pipe wall 131 is located on the periphery of the pipe cavity 132, and the pipe cavity 132 is not connected to the first cavity 111 or the second cavity 112. A phase change medium that can flow in the pipe cavity 132 is filled in the pipe cavity 132 of the heat pipe 13. The heat pipe 13 is a closed tubular structure in the working state, that is, the pipe wall 131 closes the pipe cavity 132. When manufacturing the heat pipe 13, the pipe cavity 132 can be evacuated to a certain vacuum negative pressure state and then filled with an appropriate amount (such as a space occupancy ratio of 60% - 70%) of the phase change medium. One end of the heat pipe 13 is an evaporation section (heating section), and the other end is a condensation section (cooling section). The inner wall of the pipe wall 131 can form a capillary structure. When one end of the heat pipe 13 is heated, the liquid phase change medium in its pipe cavity 131 evaporates and vaporizes, and the vapor flows to the other end under a small pressure difference and releases heat to condense into a liquid state. Then the liquid flows back to the evaporation section by the action of capillary force. In this way, the heat can be transferred from one end of the heat pipe to the other end. The heat pipe 13 makes full use of the heat conduction principle and the fast heat transfer property of the phase change medium. In this way, the heat of the heat-generating object can be quickly transferred outside the heat source through the heat pipe 13. Specifically, the heat pipe 13 in the embodiment of this application has a first part 133 and a second part 134. Both the first part 133 and the second part 134 have a part of the pipe cavity 132. The first part 133 is located on the side of the partition 110 close to the first cavity 111, and the first part 133 is at least partially received in the first cavity 111. The second part 134 is located on the side of the partition 110 close to the second cavity 112, and the second part 134 is at least partially received in the second cavity 112. That is to say, the first part 133 of the heat pipe 13 is located in the first cavity 111 that accommodates the stator and the rotor. The first part 133 includes an evaporation section. When the motor assembly 100 operates, a large amount of heat will be generated in its core part, especially the stator 12. The phase change medium in the pipe cavity 132 corresponding to the first part 133 of the heat pipe 13 absorbs the heat generated near the core part in the first cavity 111 and evaporates and vaporizes, and gradually moves towards the second part 134 side. The second part 134 of the heat pipe 13 is located in the second cavity 112. The second part 134 includes a condensation section. Thus, the phase change medium flowing to the second part 112 transfers the heat to the coolant in the second cavity 112 and then condenses into a liquid state. The liquid phase change medium returns to the first part 133 under the action of the capillary force in the pipe cavity 132 of the heat pipe 13 to continue absorbing heat. In this way, the heat of the core part is finally given to the coolant circulating in the second cavity 112 through continuous circulation. The coolant can be used to cool the core part, or the heat of the core part can be recovered through the coolant.

[0039] Correspondingly, in order to achieve the circulation of the coolant in the second chamber 112, the housing 11 is further provided with a coolant inlet 114 and a coolant outlet 115 that communicate with the second chamber 112. The coolant enters the second chamber 112 through the coolant inlet 114 and finally flows out of the second chamber 112 from the coolant outlet 115. The second chamber 112, the coolant inlet 114, and the coolant outlet 115 form at least part of the flow space for the coolant to flow.

[0040] In some embodiments, in order to better enable the phase change medium in the heat pipe 13 to absorb the heat of the stator 12, the motor assembly 100 may have a plurality of heat pipes 13, and the plurality of heat pipes 13 are circumferentially distributed along the stator 12. The axial direction of the stator 12 is denoted as M, which can be referred to Figure 3 as indicated by the dashed line in. The circumferential direction of the stator 12 is the direction around the axial direction M. At least part of the tube wall 131 of the heat pipe 13 corresponding to the first part 133 is in direct contact with the outer periphery of the stator 12 or indirectly in contact through a thermal conductive adhesive. The thermal conductive adhesive can fix the heat pipe 13 and the stator 12. In order to better absorb the heat of the stator 12, the dimension of the heat pipe 13 around the axial direction M of the stator 12 is greater than the dimension of the heat pipe 13 along the radial direction of the stator 12, that is, the dimension in the width direction of the heat pipe 13 is greater than the dimension in the thickness direction. The heat pipe 13 has a flat tubular structure. At least part of the side of the tube wall 131 of the heat pipe 13 facing the stator 12 is attached to the outer peripheral side of the stator 12. The direct contact between the tube wall 131 of the heat pipe 13 and the stator 12 is beneficial to the heat transfer between the two. Correspondingly, the coolant can absorb more heat of the stator 12.

[0041] The heat pipe 13 can be fixedly connected to the partition 110. Specifically, the partition 110 has a cavity 113 that extends from one side to the other side in the thickness direction of the partition 110, so that the cavity 113 can form a through-hole structure that penetrates the partition 110. The outer diameter of the heat pipe 13 can match the cavity 113 to assemble the heat pipe 13 with the partition 110 through the cavity 113. Specifically, the heat pipe 13 further has a third part 135 located in the cavity 113, and the third part 135 is connected between the first part 133 and the second part 134. The first part 133, the third part 135, and the second part 134 of the heat pipe 13 can be an integrally connected structure. At the cavity 113, the third part 135 of the heat pipe 13 is hermetically connected to the wall surface of the partition 110 that forms the cavity 113. For example, a sealant can be applied to the peripheral side of the third part 135 of the heat pipe 13. Furthermore, the cavities on both sides in the thickness direction of the partition 110, namely the first cavity 111 and the second cavity 112, are not connected. The sealant can be selected from materials with poor thermal conductivity, so that the heat absorbed by the first part 133 from the stator 12 is not easily transferred from the third part 135 to the housing 11 of the motor assembly 100. The first part 133 located in the first cavity 111 extends along the axial direction M of the stator 12 from the third part 135. In this way, the first part 133 can contact a larger outer surface area of the stator 12, improving the heat transfer efficiency.

[0042] In some embodiments of the present application, such as Figure 4 , Figure 6 , Figure 7 and Figure 8 shown, the second part 134 includes a main body part 136 and several protruding parts 137. The main body part 136 is connected to the third part 135 and the main body part 136 extends integrally with the third part 135. The protruding parts 137 are in the shape of thin sheets, the protruding parts 137 are arranged circumferentially around the third part 135, and several protruding parts 137 are distributed along the length direction L-L of the main body part 136. The protruding parts 137 can increase the heat exchange area between the main body part 136 and the coolant, so as to achieve the purpose of enhancing heat exchange. In this way, the length of the main body part 136 can be relatively reduced compared to the length of the first part 133, that is, the length of the second part 134 is less than the length of the first part 133, which is beneficial to the miniaturization of the motor assembly 100. Of course, the length of the second part 134 extending into the second cavity 112 cannot be too small, otherwise the phase change medium cannot be fully condensed and the heat exchange efficiency will deteriorate. In practice, the lengths and surface areas of the first part 133 and the second part 134 need to be comprehensively considered according to parameters such as the dimensions of the stator and rotor of the motor assembly and the working power.

[0043] In some embodiments, the motor assembly 100 further includes a controller 14, for reference Figure 10A heat management device 200 with a motor assembly 100 is shown. The stator 12 of the motor assembly 100 is electrically connected to the controller 14. The controller 14 is received in the first cavity 111. At least a part of the controller 14 is located between the first housing part 81 and the heat pipe 13. At least a part of the tube wall 131 of the heat pipe 13 corresponding to the first part 133 is in direct contact with the controller 14, or at least a part of the tube wall 131 of the heat pipe 13 corresponding to the first part 133 is in indirect contact with the controller 14 through a heat-conducting adhesive. At a position near the controller 14 in the first cavity 111, a heat pipe 13 can be separately provided to absorb the heat generated by the operation of the controller 14, that is, two independent heat pipes 13 can be provided between the controller 14 and the stator 12. One heat pipe 13 is relatively close to the stator 12, and the other heat pipe 13 is relatively close to the controller 14. In this way, the heat pipe 13 close to the stator 12 mainly absorbs the heat generated by the stator 12. Correspondingly, the heat pipe 13 close to the controller 14 mainly absorbs the heat generated by the controller. Of course, only one heat pipe 13 can also be provided between the controller 14 and the stator 12. One side of the heat pipe 13 is in direct contact with the stator 12 or in indirect contact through a heat-conducting adhesive, and the other side of the heat pipe 13 is in direct contact with the controller 14 or in indirect contact through a heat-conducting adhesive. Of course, in other embodiments, the controller 14 can also be located outside the first housing part 81, that is, the heat pipe 13 and the controller 14 are respectively located on the inner and outer sides of the first housing part 81. Correspondingly, the heat of the controller 14 can be conducted to the heat pipe 13 through the first housing part 81. In this way, the heat pipe 13 can also absorb the heat of the controller 14 to a certain extent.

[0044] Other embodiments of the present application also provide a heat management device 200, as Figure 9 shown. The heat management device 200 includes a scroll assembly 21, a rotating shaft 16, and the motor assembly 100 introduced in the foregoing embodiment. The scroll assembly 21 includes a scroll housing 22, a moving scroll 23, and a stationary scroll 24. The moving scroll 23 and the stationary scroll 24 are both received in the scroll housing 22.

[0045] The stator 12 of the motor assembly 100 is provided on the outer periphery of the rotor 15. The two axial sides of the rotating shaft 16 are respectively fixed to the rotor 15 and the moving scroll 23. The moving scroll 23 is movably arranged relative to the stationary scroll 24 under the drive of the rotating shaft 16. The moving scroll 23 and the stationary scroll 24 cooperate to form a scroll chamber 220.

[0046] The scroll chamber 220 is not in communication with the second chamber 112. The scroll disk housing 22 is also provided with an intake port 211 and an outlet port 212 that are respectively in communication with the scroll chamber 220. The function of the scroll disk assembly 21 is to compress the refrigerant at low temperature and low pressure into a refrigerant at high temperature and high pressure. The moving scroll disk 23 and the stationary scroll disk 24 form an intermeshing structure. The refrigerant enters the scroll disk housing 22 from the intake port 211. Specifically, the refrigerant enters the scroll chamber 220 from the intake port 211. The rotating shaft 16 of the motor assembly 100 drives the moving scroll disk 23 to perform a periodic motion relative to the stationary scroll disk 24 to compress the refrigerant entering the scroll chamber 220. The refrigerant compressed into a high temperature and high pressure finally exits from the outlet port 212. The scroll chamber 220, the intake port 211, and the outlet port 212 form at least part of the flow space for the refrigerant to flow. The thermal management device 200 has the function of a scroll compressor. The related structures and functions of the scroll compressor are well-known to those skilled in the art. Therefore, the working principle of the scroll compressor will not be described in detail in this application. Of course, the components that implement the compression function of the refrigerant in the embodiments of this application are not limited to the scroll compressor, and other related compression components that can compress the refrigerant to achieve the compression function can all be used as one of the embodiments of this application.

[0047] The refrigerant / refrigerant medium entering the scroll chamber 220 from the intake port 211 does not pass through the core part and finally exits from the outlet port 212, which can reduce the deficiency of poor compression efficiency caused by the high intake temperature of the thermal management device 200 due to the refrigerant / refrigerant medium cooling the core part.

[0048] In some embodiments, as Figure 9 shown, the scroll disk housing 22 has a first wall 221 facing the housing 11, and the housing 11 has a second wall 116 facing the scroll disk housing 22. The first wall 221 and the second wall 116 are disposed opposite to each other. The first wall 221 is provided with a first hole 227, and the second wall 116 is provided with a second hole 119. The rotating shaft 16 has a fourth part 161, a fifth part 162, and a sixth part 163 that are axially connected in sequence. The fourth part 161 is located on one axial side of the fifth part 162 and at least part of the fourth part 161 is received in the first hole 227. The sixth part 163 is located on the other axial side of the fifth part 162 and at least part of the sixth part 163 is received in the second hole 119. The fifth part 162 is located between the scroll disk housing 22 and the housing 11. The scroll disk housing 22 and the housing 11 can be of a split structure, that is, the scroll disk housing 22 and the housing 11 are respectively independent housings. The rotating shaft 16 has a penetrating relationship with the first wall 221 of the scroll disk housing 22, and the rotating shaft 16 has a penetrating relationship with the second wall 116 of the housing 11. And a part of the rotating shaft 16 is located between the scroll disk housing 22 and the housing 11. In this way, the scroll disk housing 22 has the inlet and outlet of the refrigerant, and the housing 11 has the inlet and outlet of the coolant. Correspondingly, the flow spaces of the two fluids are separated in space, and it is not easy for the two fluids to come into contact. This can improve the reliability and stability of the operation of the thermal management device.

[0049] The heat management device may include a first bearing and a second bearing. The first bearing is disposed near the first hole 227 of the first wall 221, and the second bearing is disposed near the second hole 119 of the second wall 116. The first bearing is sleeved on the fourth part 161, and the second bearing is sleeved on the sixth part 163. The first wall 221 of the scroll housing 22 and the fourth part 161 are axially sealed by the first bearing, and the second wall 116 of the housing 11 and the sixth part 163 are axially sealed by the second bearing.

[0050] Of course, in other embodiments, the scroll housing 22 and the housing 11 may also be fixedly connected, or even form an integral housing structure. Refer to Figure 11 As shown, the scroll housing 22 and the housing 11 form an integral housing structure. In this integral housing structure, the space can be divided by a plurality of partitions. For example, the integral housing structure has a first partition 110 and a second partition 118, and the first partition 110 and the second partition 118 can be distributed along the length direction of the heat management device 200. Among them, the stator 12 and the rotor 15 are located between the first partition 110 and the second partition 118. Correspondingly, the first chamber 111 and the first part 133 of the heat pipe 13 are also located between the first partition 110 and the second partition 118. The stationary scroll 23 and the rotating scroll 24 are located on the side of the second partition 118 away from the first partition, and the second chamber 112 and the second part 134 of the heat pipe 13 are both located on the side of the first partition 110 away from the second partition. The second partition 118 may correspondingly be provided with a through-hole structure matching the rotating shaft 16, and the rotating shaft 16 needs to form a penetrating assembly relationship with the second partition 118 through this through-hole structure. One side of the rotating shaft 16 is fixed to the rotating scroll 23, and the other side is fixed to the rotor 15. In this way, the rotating shaft 16 can drive the rotating scroll 23 to make periodic movements relative to the stationary scroll 24 under the drive of the rotor 15, so as to continuously compress the refrigerant entering the scroll chamber 220.

[0051] The heat management device 200 provided by the embodiment of the present application can absorb the heat near the core part in the first chamber 111 and exchange the heat with the coolant in the second chamber 112 through the phase change medium filled in the tube cavity 132 of the heat pipe 13, so as to recycle the heat near the core part of the motor assembly 100.

[0052] Refer to Figure 12As shown in the figure, an embodiment of the present application further provides a thermal management system 300, which includes the thermal management device 200 in the foregoing embodiment, a battery heat exchange device 31, a first pump 32, a first heat exchanger 33, a throttling device 34, and a second heat exchanger 35. The thermal management device 200 includes a non-communicating refrigerant flow channel and a coolant flow channel. The refrigerant flow channel includes a scroll chamber 220, an air inlet 211, and an air outlet 212. The coolant flow channel includes a second chamber 112, a coolant inlet 114, and a coolant outlet 115. Among them, both the first heat exchanger 33 and the second heat exchanger 35 are heat exchangers with refrigerant flow channels. For example, they can be air-cooled microchannel heat exchangers or liquid-cooled double-flow heat exchangers.

[0053] The air outlet 212 of the thermal management device 200 can be communicated with the refrigerant inlet of the first heat exchanger 33. The refrigerant outlet of the first heat exchanger 33 can be communicated with the refrigerant inlet of the second heat exchanger 35 through the throttling device 34. The refrigerant outlet of the second heat exchanger 35 can be communicated with the air inlet 211 of the thermal management device 200. The coolant inlet 114 and the coolant outlet 115 of the thermal management device 200 can be respectively communicated with both ends of the first pump 32.

[0054] The battery heat exchange device 31 can provide heat for the vehicle's battery. The battery heat exchange device 31 can be an integrated structure with the battery, or they can be independent split structures. The battery heat exchange device 31 has a coolant flow channel inside, so that the coolant can exchange heat with the battery.

[0055] The thermal management system 300 includes a preheating mode. In the preheating mode, the throttling device 34 and the first pump 32 are turned on. The refrigerant flow channels of the thermal management device 200, the refrigerant flow channel of the first heat exchanger 33, the throttling device 34, and the refrigerant flow channel of the second heat exchanger 35 are connected to form a refrigerant circuit. The first pump 32, the battery heat exchange device 31, and the coolant flow channel of the thermal management device 200 are connected to form a coolant circuit. That is to say, in the preheating mode, the air outlet 212 of the thermal management device 200, the scroll chamber 220 of the thermal management device 200, the refrigerant flow channel of the first heat exchanger 33, the throttling device 34, the refrigerant flow channel of the second heat exchanger 35, and the air inlet 211 of the thermal management device 200 are connected to form a refrigerant circuit. In this refrigerant circuit, the first heat exchanger 33 serves as a condenser, and the second heat exchanger 35 serves as an evaporator. That is, the first heat exchanger 33 is located between the air outlet 212 of the thermal management device 200 and the inlet of the throttling device 34, and the second heat exchanger 35 is located between the outlet of the throttling device 34 and the air inlet 211 of the thermal management device 200. The coolant outlet 115 of the thermal management device 200, the second chamber 112 of the thermal management device 200, the pump chamber of the first pump 32, the coolant flow channel of the battery heat exchange device 31, and the coolant inlet 114 of the thermal management device 200 are connected to form a coolant circuit.

[0056] In a specific application scenario, when the vehicle is just started in winter, the external environment is relatively low, and the temperature of the vehicle battery is also relatively low. In order to quickly restore the battery to a suitable operating temperature, the thermal management system 300 can start the preheating mode. In the preheating mode, the first heat exchanger 33 is used as a condenser, and the second heat exchanger 35 is used as an evaporator. The thermal management device 200 compresses the low-temperature and low-pressure gaseous refrigerant into a high-temperature and high-pressure gaseous refrigerant. The high-temperature and high-pressure refrigerant exchanges heat with the surrounding air flow in the first heat exchanger 33. The refrigerant releases heat to increase the temperature of the surrounding air. Under the action of the air flow, the hot air can be sent into the vehicle compartment to increase the temperature of the compartment, achieving a certain heating function. The refrigerant then undergoes a phase change and condenses into a liquid or a liquid-vapor two-phase refrigerant. The refrigerant flows out of the first heat exchanger 33, passes through the throttling device 34 for throttling, and cools down and reduces pressure to become a low-temperature and low-pressure refrigerant. The low-temperature and low-pressure refrigerant enters the second heat exchanger 35 to exchange heat with the outdoor air, absorbs the heat of the ambient air, and the refrigerant then undergoes a phase change and mostly evaporates into a low-temperature and low-pressure gaseous refrigerant, flowing back into the refrigerant flow path of the thermal management device 200, and so on in a cycle.

[0057] At the same time, in the coolant circuit, the first pump 32, the battery heat exchange device 31, and the coolant flow path of the thermal management device 200 are connected to form a coolant circuit. The coolant in the coolant flow path of the thermal management device 200 can absorb the heat of the core part and bring this heat to the battery heat exchange device 31 through the circulating flow of the coolant. The battery heat exchange device 31 can transfer the heat to the battery. Therefore, the heat of the core part of the thermal management device 200 can be recovered to heat or preheat the battery, enabling the battery to operate efficiently within a suitable temperature range. The heat of the core part and / or the controller 14 of the thermal management device 200 can be fully recovered, improving the coefficient of performance (COP) of the thermal management system. Moreover, the intake air temperature of the thermal management device 200 becomes lower, and the concentration of the refrigerant entering the compressor is greater, thereby also improving the operating efficiency of the thermal management device 200.

[0058] Of course, refer to Figure 12As shown in the figure, an embodiment of the present application further provides a thermal management system 300, which includes the thermal management device 200 in the foregoing embodiment, a third heat exchanger 31, a first pump 32, a first heat exchanger 33, a throttling device 34, and a second heat exchanger 35. The thermal management device 200 includes an unconnected refrigerant flow channel and a coolant flow channel. The refrigerant flow channel includes a scroll chamber 220, an air inlet 211, and an air outlet 212. The coolant flow channel includes a second chamber 112, a coolant inlet 114, and a coolant outlet 115. Among them, both the first heat exchanger 33 and the second heat exchanger 35 are heat exchangers with refrigerant flow channels. For example, they can be air-cooled microchannel heat exchangers or liquid-cooled double-flow heat exchangers. The third heat exchanger 31 can be a radiator with a coolant flow channel.

[0059] The thermal management system 300 further includes a refrigeration mode. In the refrigeration mode, the air outlet 212 of the thermal management device 200, the scroll chamber 220 of the thermal management device 200, the refrigerant flow channel of the first heat exchanger 33, the throttling device 34, the refrigerant flow channel of the second heat exchanger 35, and the air inlet 211 of the thermal management device 200 are connected to form a refrigerant circuit. The first heat exchanger 33 serves as a condenser, and the second heat exchanger 35 serves as an evaporator. That is, the first heat exchanger 33 is located between the air outlet 212 of the thermal management device 200 and the inlet of the throttling device 34, and the second heat exchanger 35 is located between the outlet of the throttling device 34 and the air inlet 211 of the thermal management device 200. The coolant outlet 115 of the thermal management device 200, the second chamber 112 of the thermal management device 200, the pump chamber of the first pump 32, the coolant flow channel of the third heat exchanger 31, and the coolant inlet 114 of the thermal management device 200 are connected to form a coolant circuit. The thermal management system 300 may further include structures such as an air conditioning box and a cooling fan. The third heat exchanger 31 and the cooling fan are disposed outside the air conditioning box, and the cooling fan and the third heat exchanger 31 are assembled together to form a front-end module.

[0060] The third heat exchanger 31 is a low-temperature radiator disposed outside the air conditioning box. The first pump 32 drives the coolant through the coolant flow channel of the thermal management device 200 and brings the heat of the core part of the thermal management device 200 to the third heat exchanger 31. The cooling fan drives the air flow through the outer surface of the third heat exchanger 31, thereby cooling the coolant inside the third heat exchanger 31, and thus cooling and dissipating heat from the core part of the thermal management device 200. In the related art, there is a method of using refrigerant / refrigerant to cool the motor part of the compressor. However, this cooling method will increase the suction temperature of the scroll assembly of the compressor, so that the concentration of the refrigerant becomes relatively thin. Therefore, the compression efficiency of the compressor in the related art is low.

[0061] In this application, the core part of the thermal management device 200 is innovatively cooled by the coolant circuit in the thermal management system 300. Compared with the related technology that uses refrigerant / cooling medium for cooling, the intake air temperature at the intake port 211 corresponding to the inlet scroll assembly of the thermal management device 200 is reduced. As a result, the concentration of the refrigerant becomes relatively large. Therefore, it is beneficial to improve the compression efficiency of the compressor 14.

[0062] In the refrigeration mode, the working principle of the thermal management system 300 for cooling the passenger compartment is as follows: The thermal management device 200 compresses the refrigerant into a high-temperature and high-pressure gaseous refrigerant. The high-temperature and high-pressure gaseous refrigerant flows from the outlet 212 of the thermal management device 200 to the first heat exchanger 33. The first heat exchanger 33 releases heat to the outdoor air, and the high-temperature and high-pressure refrigerant in the first heat exchanger 33 condenses into a liquid refrigerant or a gas-liquid two-phase refrigerant. After being throttled and depressurized by the throttling device 34, it becomes a low-temperature and low-pressure liquid refrigerant or a gas-liquid two-phase refrigerant, and then enters the second heat exchanger 35. The low-temperature and low-pressure refrigerant in the second heat exchanger 35 absorbs the heat of the air in the air conditioner box and evaporates into a gas or a gas-liquid state, thereby reducing the temperature of the air in the air conditioner box. The air in the air conditioner box enters the passenger compartment through the air damper and pipeline, thus realizing the cooling of the passenger compartment. The throttling device 34 can be a throttling device such as an electronic expansion valve, a thermostatic expansion valve, or a capillary tube. In some embodiments, the first throttling device 34 is an electronic expansion valve, so as to control and regulate the flow rate of the refrigerant more precisely and easily.

[0063] Reference Figure 13 As shown, in other embodiments of this application, a thermal management system 300 is further provided. The thermal management system 300 includes the thermal management device 200, the first pump 32, the first heat exchanger 33, the throttling device 34, and the second heat exchanger 35 in the foregoing embodiments. The thermal management device 200 includes a first refrigerant flow channel and a first coolant flow channel that are not connected. The refrigerant flow channel includes a scroll chamber 220, an intake port 211, and an outlet 212. The coolant flow channel includes a second chamber 112, a coolant inlet 114, and a coolant outlet 115. Among them, the first heat exchanger 33 is a heat exchanger with a refrigerant flow channel, for example, it can be an air-cooled microchannel heat exchanger or a liquid-cooled double-flow channel plate heat exchanger. The second heat exchanger 35 is a double-flow channel heat exchanger, and the second heat exchanger 35 includes a second refrigerant flow channel and a second coolant flow channel that are not connected.

[0064] The air outlet 212 of the thermal management device 200 can be communicated with the refrigerant inlet of the first heat exchanger 33. The refrigerant outlet of the first heat exchanger 33 can be communicated with the refrigerant inlet of the corresponding second refrigerant flow path of the second heat exchanger 35 through the throttling device 34. The refrigerant outlet of the corresponding second refrigerant flow path of the second heat exchanger 35 can be communicated with the air inlet 211 of the thermal management device 200. The coolant outlet 115 of the thermal management device 200 can be communicated with one end of the first pump 32 through the inlet of the second coolant flow path of the second heat exchanger 35. The coolant inlet 114 of the thermal management device 200 can be communicated with the outlet of the second coolant flow path of the second heat exchanger 35.

[0065] The thermal management system 300 includes a heating mode. In the heating mode, the throttling device 34 and the first pump 32 are turned on. The first refrigerant flow path of the thermal management device 200, the first heat exchanger 33, the throttling device 34, and the second refrigerant flow path of the second heat exchanger 35 are communicated to form a refrigerant circuit. The first heat exchanger 33 is located between the air outlet 212 of the thermal management device 200 and the inlet of the throttling device 34. The second heat exchanger 35 is located between the outlet of the throttling device 34 and the air inlet 211 of the thermal management device 200. The first pump 32, the first coolant flow path of the thermal management device 200, and the second coolant flow path of the second heat exchanger 35 are communicated to form a circuit.

[0066] Specifically, after the vehicle is started in winter, the external environment is relatively low. In order to provide a warm cabin environment for the passengers in the passenger compartment, the thermal management system 300 can start the heating mode. In the heating mode, the first heat exchanger 33 is used as a condenser, and the first heat exchanger 33 can be arranged in the passenger compartment. The second heat exchanger 35 is used as an evaporator. The thermal management device 200 compresses the low-temperature and low-pressure gaseous refrigerant into a high-temperature and high-pressure gaseous refrigerant. The high-temperature and high-pressure refrigerant exchanges heat with the surrounding air flow in the first heat exchanger 33. The refrigerant releases heat to increase the temperature of the surrounding air. Under the action of the air flow, the hot air can be sent into the passenger compartment to increase the temperature of the passenger compartment, thereby realizing the heating function. The refrigerant then undergoes a phase change and condenses into a liquid or a gas-liquid two-phase refrigerant. After at least a part of the refrigerant flows out of the first heat exchanger 33, it is throttled by the throttling device 34, and the temperature and pressure are reduced to become a low-temperature and low-pressure refrigerant. The low-temperature and low-pressure refrigerant enters the second heat exchanger 35 and exchanges heat with the fluid flowing through the second coolant flow path of the second heat exchanger 35, absorbing the heat of the fluid in the second coolant flow path. This part of the refrigerant then undergoes a phase change and evaporates into a low-temperature and low-pressure gaseous refrigerant, and flows back into the first refrigerant flow path of the thermal management device 200, and so on in a cycle.

[0067] At the same time, in the coolant circuit, the first pump 32, the first coolant flow path of the thermal management device 200, and the second coolant flow path of the second heat exchanger 35 are connected to form a coolant circuit. The coolant in the first coolant flow path of the thermal management device 200 can absorb the heat of the core part of the thermal management device 200 and bring this heat to the second coolant flow path of the second heat exchanger 35 through the circulating flow of the coolant. The second coolant flow path of the second heat exchanger 35 transfers the heat of the core part to the second refrigerant flow path of the second heat exchanger 35. In practical applications, the waste heat of the motor collected by the first coolant flow path of the thermal management device 200 provides a heat source for the passenger compartment. Thus, the heat of the motor stator that was originally wasted can be recycled, thereby improving the heating performance of the thermal management system 300.

[0068] The above are only the preferred embodiments of the present application, and do not impose any formal restrictions on the present application. Although the present application has been disclosed above with the preferred embodiments, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to equivalent embodiments with equivalent changes within the scope of the technical solution of the present application without departing from the technical solution of the present application. However, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present application still fall within the scope of the technical solution of the present application.

Claims

1. A motor assembly (100), characterized in that, It includes a housing (11), a core part, and at least one heat pipe (13); The housing (11) includes a first housing part (81) and a second housing part (82); the first housing part (81) has a first cavity (111), and the second housing part (82) has a second cavity (112); the first cavity (111) and the second cavity (112) are not connected; the core part includes a rotor (15) and a stator (12) circumferentially arranged around the rotor (15); at least part of the core part is received in the first cavity (111); The heat pipe (13) has a pipe wall (131) and a pipe cavity (132), the pipe wall (131) is located on the periphery of the pipe cavity (132), the pipe cavity (132) is filled with a phase change medium, and the pipe cavity (132) is not connected to both the first cavity (111) and the second cavity (112); the heat pipe (13) has a first part (133) located in the first cavity (111) and a second part (134) located in the second cavity (112); at least part of the first part (133) is located between the stator (12) and the first housing part (81); The second housing part (82) is further provided with a coolant inlet (114) and a coolant outlet (115); the coolant inlet (114) is connected to the second cavity (112), and the coolant outlet (115) is connected to the second cavity (112); The motor assembly (100) further includes a controller (14); the stator (12) is electrically connected to the controller (14); the pipe wall of the heat pipe (13) corresponding to the first part (133) is in direct contact or indirect contact with the controller (14).

2. The motor assembly (100) according to claim 1, characterized in that, The first housing part (81) and the second housing part (82) are connected into an integral structure; the housing (11) further includes a partition plate (110), the partition plate (110) is located between the first housing part and the second housing part, and the first cavity (111) and the second cavity (112) are respectively located on different sides of the thickness direction of the partition plate (110); The motor assembly (100) has a plurality of heat pipes (13), and the plurality of heat pipes (13) are evenly distributed around the axial direction (M) of the stator (12), and at least part of the pipe wall of the heat pipe (13) corresponding to the first part (133) is in direct contact or indirect contact with the outer periphery of the stator (12) through a thermal conductive adhesive.

3. The motor assembly (100) according to claim 2, wherein, The dimension of the heat pipe (13) around the axial direction (M) of the stator (12) is greater than the dimension of the heat pipe (13) along the radial direction of the stator (12); at least part of the side of the pipe wall (131) of the heat pipe (13) facing the stator (12) is attached to the outer peripheral side of the stator (12).

4. The motor assembly (100) according to claim 2, characterized in that, The partition plate (110) has a cavity (113) that extends from one side to the other side in the thickness direction of the partition plate (110); the heat pipe (13) further has a third part (135) received in the cavity (113), and the third part (135) is connected between the first part (133) and the second part (134); the first part (133) extends from the third part (135) along the axial direction (M) of the stator (12).

5. The motor assembly (100) according to claim 4, characterized in that, The second part (134) includes a main body part (136) and a plurality of protruding parts (137); the main body part (136) is connected to the third part (135) and extends integrally with the third part (135); the protruding parts (137) are circumferentially arranged around the third part (135), and the plurality of protruding parts (137) are distributed along the length direction of the main body part (136).

6. The motor assembly (100) according to claim 1, characterized in that, The controller (14) is received in the first cavity (111); the controller (14) is fixedly installed on the inner wall of the first housing part (81); at least part of the controller (14) is located between the first housing part (81) and the heat pipe (13); the tube wall of the heat pipe (13) corresponding to the first part (133) is indirectly in contact with the controller (14) through a heat-conducting adhesive.

7. A thermal management device (200), characterized in that, The thermal management device (200) includes a scroll disk assembly (21), a rotating shaft (16), and the motor assembly (100) according to any one of claims 1 to 6; the scroll disk assembly (21) includes a scroll disk housing (22), a moving scroll disk (23), and a stationary scroll disk (24); the moving scroll disk (23) and the stationary scroll disk (24) are both received in the scroll disk housing (22). The rotor (15) is connected to the moving scroll disk (23) through the rotating shaft (16); the moving scroll disk (23) is movably arranged relative to the stationary scroll disk (24) driven by the rotating shaft (16); the moving scroll disk (23) and the stationary scroll disk (24) cooperate to form a scroll cavity (220); the scroll disk housing (22) is further provided with an air inlet (211) and an air outlet (212); the air inlet (211) communicates with the scroll cavity (220), and the air outlet (212) communicates with the scroll cavity (220).

8. The thermal management device (200) according to claim 7, characterized in that, There is a gap between the scroll disk housing (22) and the housing (11); the scroll disk housing (22) has a first wall (221) facing the housing (11); the housing (11) has a second wall (116) facing the scroll disk housing (22); the first wall (221) and the second wall (116) are arranged opposite to each other; the first wall (221) is provided with a first hole (227); the second wall (116) is provided with a second hole (119); the rotating shaft (16) has a fourth part (161), a fifth part (162), and a sixth part (163) connected in sequence axially; the fourth part (161) is located on one axial side of the fifth part (162) and at least part of the fourth part (161) is received in the first hole (227); the sixth part (163) is located on the other axial side of the fifth part (162) and at least part of the sixth part (163) is received in the second hole (119); the fifth part (162) is located between the scroll disk housing (22) and the housing (11).

9. A thermal management system (300), characterized in that, Comprising: The thermal management device (200), battery heat exchange device (31), first pump (32), first heat exchanger (33), throttling device (34), and second heat exchanger (35) as claimed in claim 7 or 8; the battery heat exchange device (31) is capable of providing heat to the vehicle battery; The thermal management system (300) includes a preheating mode, in which the outlet (212) of the thermal management device (200), the first heat exchanger (33), the throttling device (34), the second heat exchanger (35), and the inlet (211) of the thermal management device (200) are connected to form a refrigerant circuit. The first heat exchanger (33) is located between the outlet (212) of the thermal management device (200) and the inlet of the throttling device (34), and the second heat exchanger (35) is located between the outlet of the throttling device (34) and the inlet (211) of the thermal management device (200); the coolant outlet (115) of the thermal management device (200), the first pump (32), the battery heat exchange device (31), and the coolant inlet (114) of the thermal management device (200) are connected to form a coolant circuit.

10. A thermal management system (300), characterized in that, Comprising: The thermal management device (200), first pump (32), first heat exchanger (33), throttling device (34), and second heat exchanger (35) as claimed in claim 7 or 8; the second heat exchanger (35) includes non - communicating refrigerant flow channels and coolant flow channels; The heat management system (300) includes a heating mode. In the heating mode, an outlet (212) of the heat management device (200), the first heat exchanger (33), the throttling device (34), a refrigerant flow path of the second heat exchanger (35), and an inlet (211) of the heat management device (200) are connected to form a refrigerant circuit. The first heat exchanger (33) is located between the outlet (212) of the heat management device (200) and an inlet of the throttling device (34). The second heat exchanger (35) is located between an outlet of the throttling device (34) and the inlet (211) of the heat management device (200). A coolant outlet (115) of the heat management device (200), the first pump (32), a coolant inlet (114) of the heat management device (200), and a coolant flow path of the second heat exchanger (35) are connected to form a coolant circuit.

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