Air compressor housing, air compressor, fuel cell system and vehicle

Abstract

The present invention discloses an air compressor housing, an air compressor, a fuel cell system and a vehicle. The invention belongs to the field of vehicle technology. The air compressor housing is used for an air compressor. The air compressor housing has a motor cavity, a compression cavity, a motor cooling channel and a bearing cooling channel. The motor cooling channel is arranged outside the motor cavity. Coolant can be introduced into the motor cooling channel to cool the motor and the bearing in the motor cavity, thereby realizing liquid cooling of the motor and the bearing. The bearing cooling channel includes a heat exchange channel and an outflow channel, and the heat exchange channel is thermally connected to the motor cooling channel. The coolant in the motor cooling channel can also cool the air in the heat exchange channel of the bearing cooling channel. The cooled air can flow into the motor cavity to cool the motor and the bearing, thereby realizing air cooling of the motor and the bearing. The motor and the bearing are cooled by a cooling method of air cooling plus water cooling, thereby effectively preventing the temperature of the motor and the bearing from exceeding a preset range, thereby facilitating stable and reliable operation of the air compressor.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to an air compressor housing, an air compressor, a fuel cell system and a vehicle. Background Art

[0002] Air compressors can be used in fuel cell systems and are suitable for providing air to the fuel cells of the fuel cell system. When the air compressor is running, the temperature of its motor and the bearings of the main shaft used to support the motor will continue to rise. If the temperature of the motor and the bearings exceeds the preset range, it may cause problems such as motor fire and bearing structure deformation, affecting the normal operation of the air compressor. Summary of the invention

[0003] The present invention aims to solve at least one of the above technical problems in the prior art to a certain extent. To this end, the present invention provides an air compressor housing, which can cool the motor and bearings by air cooling plus water cooling, which is conducive to stable and reliable operation of the air compressor.

[0004] The present invention also provides an air compressor having the air compressor housing.

[0005] The present invention also proposes a fuel cell system having the air compressor.

[0006] The present invention also provides a vehicle having the fuel cell system.

[0007] According to the air compressor casing of the first aspect embodiment of the present invention, the air compressor casing is used for an air compressor, and the air compressor casing has: a motor cavity, a compression cavity, a motor cooling channel and a bearing cooling channel, the motor cavity is suitable for accommodating the motor and bearing of the air compressor; the compression cavity is suitable for accommodating a compression wheel transmission-connected to the motor; the motor cooling channel is arranged on the outside of the motor cavity; the bearing cooling channel comprises: a heat exchange channel and an outflow channel, the inlet of the heat exchange channel is connected to the compression cavity, the outlet of the heat exchange channel is connected to the motor cavity, and the heat exchange channel is thermally connected to the motor cooling channel, the inlet of the outflow channel is connected to the motor cavity, and the outlet of the outflow channel is connected to the outside of the motor cavity.

[0008] According to the air compressor housing of the embodiment of the present invention, the motor cooling channel outside the motor cavity can be filled with coolant to cool the motor and bearings in the motor cavity, thereby realizing liquid cooling of the motor and bearings. The coolant in the motor cooling channel can also cool the air in the heat exchange channel of the bearing cooling channel. The cooled air can flow into the motor cavity to cool the motor and bearings, thereby realizing air cooling of the motor and bearings. Cooling the motor and bearings by a cooling method of air cooling plus water cooling can effectively prevent the temperature of the motor and bearings from exceeding a preset range, which is beneficial to the stable and reliable operation of the air compressor.

[0009] According to some embodiments of the present invention, the heat exchange channel includes: an inlet section, a heat exchange section and an outlet section connected in sequence, the end of the inlet section away from the heat exchange section is the inlet of the heat exchange channel, the end of the outlet section away from the heat exchange section is the outlet of the heat exchange channel, the heat exchange section is thermally connected to the motor cooling channel, and at least a portion of the motor cooling channel is located between the heat exchange section and the motor cavity.

[0010] According to some embodiments of the present invention, the heat exchange section extends in a zigzag manner on a side of the motor cooling channel away from the motor cavity.

[0011] According to some embodiments of the present invention, the motor cooling channel is spirally wound around the outside of the motor cavity.

[0012] According to some embodiments of the present invention, the outlet of the heat exchange channel and the inlet of the outflow channel are located on both sides of the bearing in the axial direction.

[0013] According to some embodiments of the present invention, the number of outlets of the heat exchange channel is the same as the number of the bearings.

[0014] An air compressor according to an embodiment of the second aspect of the present invention includes: an air compressor housing, a motor, a bearing and a pressure wheel, wherein the air compressor housing is the above-mentioned air compressor housing; at least part of the motor is disposed in the motor cavity; the main shaft of the motor is rotatably connected to the inner wall of the motor cavity through the bearing; at least part of the pressure wheel is disposed in the compression cavity, and the pressure wheel is drivingly connected to the main shaft of the motor.

[0015] According to the air compressor of the embodiment of the present invention, the motor cooling channel outside the motor cavity of the air compressor housing can be filled with coolant to cool the motor and bearings in the motor cavity, thereby realizing liquid cooling of the motor and bearings. The coolant in the motor cooling channel can also cool the air in the heat exchange channel of the bearing cooling channel. The cooled air can flow into the motor cavity to cool the motor and bearings, thereby realizing air cooling of the motor and bearings. Cooling the motor and bearings by a cooling method of air cooling plus water cooling can effectively prevent the temperature of the motor and bearings from exceeding a preset range, which is beneficial to the stable and reliable operation of the air compressor.

[0016] According to some embodiments of the present invention, the bearing is a gas bearing.

[0017] A fuel cell system according to an embodiment of the third aspect of the present invention includes the above-mentioned air compressor.

[0018] In the fuel cell system according to an embodiment of the present invention, the motor cooling channel outside the motor cavity of the air compressor can be filled with coolant to cool the motor and bearings in the motor cavity, thereby realizing liquid cooling of the motor and bearings. The coolant in the motor cooling channel can also cool the air in the heat exchange channel of the bearing cooling channel. The cooled air can flow into the motor cavity to cool the motor and bearings, thereby realizing air cooling of the motor and bearings. Cooling the motor and bearings by a cooling method of air cooling plus water cooling can effectively prevent the temperature of the motor and bearings from exceeding a preset range, which is beneficial to the stable and reliable operation of the air compressor.

[0019] A vehicle according to an embodiment of the fourth aspect of the present invention includes the above-mentioned fuel cell system.

[0020] According to the vehicle of the embodiment of the present invention, the motor cooling channel outside the motor cavity of the air compressor can be filled with coolant to cool the motor and bearings in the motor cavity, thereby realizing liquid cooling of the motor and bearings. The coolant in the motor cooling channel can also cool the air in the heat exchange channel of the bearing cooling channel. The cooled air can flow into the motor cavity to cool the motor and bearings, thereby realizing air cooling of the motor and bearings. Cooling the motor and bearings by a cooling method of air cooling plus water cooling can effectively prevent the temperature of the motor and bearings from exceeding a preset range, which is beneficial to the stable and reliable operation of the air compressor.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the internal structure of an air compressor according to an embodiment of the present invention;

[0023] Figure 2 Schematic diagram of the flow path of air inside the air compressor casing according to an embodiment of the present invention.

[0024] Reference numerals:

[0025] Motor cavity 1; compression cavity 2; motor cooling channel 3; bearing cooling channel 4; heat exchange channel 41; inlet section 411; heat exchange section 412; outlet section 413; outflow channel 42;

[0026] Air compressor housing 10; motor 20; main shaft 201; bearing 30; pressure wheel 40; air compressor 100. DETAILED DESCRIPTION

[0027] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0028] In the description of the present invention, it is necessary to understand that the terms "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Combine the following Figure 1 and Figure 2 The air compressor housing 10 , the air compressor 100 , the fuel cell system and the vehicle according to the embodiments of the present invention are described in detail.

[0032] Reference Figure 1 and Figure 2As shown, according to the air compressor housing 10 of the first aspect embodiment of the present invention, the air compressor housing 10 is used for the air compressor 100, and the air compressor housing 10 has: a motor cavity 1, a compression cavity 2, a motor cooling channel 3 and a bearing cooling channel 4, the motor cavity 1 is suitable for accommodating the motor 20 and the bearing 30 of the air compressor 100, the compression cavity 2 is suitable for accommodating the compression wheel 40 transmission connected to the motor 20, the motor cooling channel 3 is arranged on the outside of the motor cavity 1, and the bearing cooling channel 4 includes: a heat exchange channel 41 and an outflow channel 42, the inlet of the heat exchange channel 41 is connected to the compression cavity 2, the outlet of the heat exchange channel 41 is connected to the motor cavity 1, and the heat exchange channel 41 is thermally connected to the motor cooling channel 3, the inlet of the outflow channel 42 is connected to the motor cavity 1, and the outlet of the outflow channel 42 is connected to the outside of the motor cavity 1.

[0033] It should be noted that a coolant can be introduced into the motor cooling channel 3, and the coolant is suitable for exchanging heat with the motor 20 and the bearing 30 in the motor cavity 1 to dissipate heat from the motor 20 and the bearing 30. Specifically, the coolant in the motor cooling channel 3 can cool the inner wall of the motor cavity 1, and the inner wall of the motor cavity 1 after cooling can cool the motor 20 and the bearing 30, thereby realizing water cooling of the motor 20 and the bearing 30.

[0034] The motor 20 is transmission-connected to the pressure wheel 40. The motor 20 can drive the pressure wheel 40 to rotate to compress the air. The compressed air can flow into the heat exchange channel 41 through the inlet of the heat exchange channel 41 connected to the compression chamber 2. Since the heat exchange channel 41 is thermally connected to the motor cooling channel 3, the air in the heat exchange channel 41 can exchange heat with the coolant in the motor cooling channel 3 to cool the air. The cooled air can flow into the motor cavity 1 through the outlet of the cooling channel. The air can directly cool the motor 20 and the bearing 30 in the motor cavity 1, thereby realizing air cooling of the motor 20 and the bearing 30. Then, the air can flow into the outflow channel 42 through the inlet of the outflow channel 42, and then flow to the outside of the motor cavity 1 through the outlet of the outflow channel 42.

[0035] Cooling the motor 20 and the bearing 30 by a combination of air cooling and water cooling can effectively reduce the temperature of the motor 20 and the bearing 30, prevent the temperature of the motor 20 and the bearing 30 from exceeding a preset range, reduce the risk of motor fire and bearing structure deformation, and facilitate stable and reliable operation of the air compressor 100.

[0036] It can be understood that the inlet of the heat exchange channel 41 is connected to the compression chamber 2, and the air compressed by the compression wheel 40 in the compression chamber 2 can directly flow into the heat exchange channel 41 through the inlet of the heat exchange channel 41, so as to realize the heat exchange channel 41 to bleed air inside the air compressor housing 10, and the heat exchange channel 41 is thermally connected to the motor cooling channel 3, so as to utilize the coolant in the motor cooling channel 3 to cool the air in the heat exchange channel 41. The air compressor 100 does not need to set an air supply structure outside the air compressor housing 10, does not need to set an air bleed mechanism to introduce the gas of the air supply structure into the motor cavity 1, and does not need to set a cooling structure for cooling the cooling gas, which is beneficial to saving the layout space of the air compressor 100, and the gas cooled in the heat exchange channel 41 can directly flow into the motor cavity 1 to cool the motor 20 and the bearing 30. The air flow path is short, which can reduce the cooling loss of the air, and is beneficial to improving the use efficiency of the air compressor 100.

[0037] According to the air compressor housing 10 of the embodiment of the present invention, the motor cooling channel 3 on the outside of the motor cavity 1 thereof can be passed with coolant to cool the motor 20 and the bearing 30 in the motor cavity 1, thereby realizing liquid cooling of the motor 20 and the bearing 30. The coolant in the motor cooling channel 3 can also cool the air in the heat exchange channel 41 of the bearing cooling channel 4. The cooled air can flow into the motor cavity 1 to cool the motor 20 and the bearing 30, thereby realizing air cooling of the motor 20 and the bearing 30. Cooling the motor 20 and the bearing 30 by a cooling method of air cooling plus water cooling can effectively prevent the temperature of the motor 20 and the bearing 30 from exceeding a preset range, which is beneficial to the stable and reliable operation of the air compressor 100.

[0038] In some embodiments of the present invention, reference Figure 1 As shown, the heat exchange channel 41 includes: an inlet section 411, a heat exchange section 412 and an outlet section 413 connected in sequence, the end of the inlet section 411 away from the heat exchange section 412 is the inlet of the heat exchange channel 41, the end of the outlet section 413 away from the heat exchange section 412 is the outlet of the heat exchange channel 41, the heat exchange section 412 is thermally connected to the motor cooling channel 3, and at least part of the motor cooling channel 3 is located between the heat exchange section 412 and the motor cavity 1, that is, part of the motor cooling channel 3 is located between the heat exchange section 412 and the motor cavity 1, or the entire motor cooling channel 3 is located between the heat exchange section 412 and the motor cavity 1, the coolant in the motor cooling channel 3 can directly exchange heat with the inner wall of the motor cavity 1, and the cooled inner wall of the motor cavity 1 can directly cool the motor 20 and the bearing 30, which is beneficial to improving the cooling effect on the motor 20 and the bearing 30.

[0039] Among them, when the air compressor 100 is working, the air compressed by the compression wheel 40 can flow into the inlet section 411 through the inlet of the heat exchange channel 41, and then flow from the inlet section 411 to the heat exchange section 412. Since the heat exchange section 412 is thermally connected to the motor cooling channel 3, the air in the heat exchange section 412 can exchange heat with the coolant in the cooling channel to cool the air in the heat exchange section 412. The cooled air can flow to the outlet section 413, and then flow into the motor cavity 1 through the outlet of the heat exchange channel 41 to cool the motor 20 and the bearing 30 in the motor cavity 1.

[0040] In some embodiments of the present invention, reference Figure 1 and Figure 2 As shown, the heat exchange section 412 extends in a zigzag manner on the side of the motor cooling channel 3 away from the motor cavity 1, that is, the motor cooling channel 3 is entirely located between the heat exchange section 412 and the motor cavity 1, which can avoid the heat exchange section 412 blocking the heat exchange between the coolant in the motor cooling channel 3 and the motor 20 and the bearing 30 in the motor cavity 1, which is beneficial to improving the cooling effect on the motor 20 and the bearing 30.

[0041] It can be understood that the zigzag extension of the heat exchange section 412 can increase the length of the heat exchange section 412, thereby increasing the heat exchange area between the air in the heat exchange section 412 and the coolant in the motor cooling channel 3, and can increase the time for the air to flow through the heat exchange section 412, thereby increasing the heat exchange time between the air in the heat exchange section 412 and the coolant in the motor cooling channel 3, and can achieve sufficient cooling of the air in the heat exchange section 412, which is beneficial to improving the cooling effect of the cooled air on the motor 20 and the bearing 30.

[0042] In some embodiments of the present invention, the heat exchange section 412 extends in the circumferential direction of the motor cavity 1 to further increase the length of the heat exchange section 412, which is beneficial to increase the heat exchange area and heat exchange time between the air in the heat exchange section 412 and the motor cooling channel 3, thereby improving the cooling effect on the air in the heat exchange section 412.

[0043] In some embodiments of the present invention, the motor cooling channel 3 is spirally wound around the outside of the motor cavity 1, which is beneficial for the coolant in the motor cooling channel 3 to fully cool the motor 20 and the bearing 30 in the motor cavity 1.

[0044] It can be understood that the motor cooling channel 3 is spiral-shaped, which can increase the length of the motor cooling channel 3, which is beneficial to increase the heat exchange area between the coolant in the motor cooling channel 3 and the motor 20, and can quickly cool the motor 20. The spiral motor cooling channel 3 is arranged around the outside of the motor cavity 1, and the coolant in the motor cooling channel 3 can evenly cool the motor 20 in the circumferential direction of the motor cavity 1.

[0045] In some embodiments of the present invention, the outlet of the heat exchange channel 41 and the inlet of the outflow channel 42 are located on both axial sides of the bearing 30 , which is beneficial for the cooled air to fully cool the bearing 30 in the axial direction of the bearing 30 .

[0046] It can be understood that after the cooled air flows into the motor cavity 1 from the outlet of the heat exchange channel 41, the air can continue to flow to the inlet of the outflow channel 42. Since the outlet of the heat exchange channel 41 and the inlet of the outflow channel 42 are located on both sides of the axial direction of the bearing 30, when the air flows from the outlet of the heat exchange channel 41 to the inlet of the outflow channel 42, in the axial direction of the bearing 30, the air can flow from one side of the bearing 30 to the other side of the bearing 30, so as to fully cool the bearing 30 in the axial direction of the bearing 30, avoid the local temperature of the bearing 30 in the axial direction being too high, which is beneficial to ensure the normal operation of the air compressor 100.

[0047] In some embodiments of the present invention, the number of outlets of the heat exchange flow channel 41 is the same as the number of the bearings 30 , so as to cool each bearing 30 .

[0048] Specifically, the number of outlets of the heat exchange channel 41 is the same as the number of bearings 30 , and the outlets of the multiple heat exchange channels 41 correspond one-to-one to the multiple bearings 30 . The air in the heat exchange channel 41 can flow to the multiple bearings 30 through the multiple outlets respectively to cool each bearing 30 .

[0049] In this embodiment, refer to Figure 1 and Figure 2 As shown, the number of outlets of the heat exchange flow channel 41 and the number of bearings 30 are both two. In the axial direction of the main shaft 201 of the motor 20, the two bearings 30 are arranged at intervals, and the inlet of the outflow flow channel 42 is located between the outlets of the two heat exchange flow channels 41. The high-temperature and high-pressure air compressed by the pressure wheel 40 can flow into the heat exchange flow channel 41 through the inlet of the heat exchange flow channel 41. When the air flows through the heat exchange flow channel 41, the heat will be taken away by the coolant in the motor cooling flow channel 3. The cooled air can flow to the motor cavity 1 through the two outlets respectively, so as to form a diversion guide blowing to the two bearings 30 opposite to each other. On the other side, the two bearings 30 are cooled at the same time, and then the air that cools the two bearings 30 respectively flows to the inlet of the outflow channel 42, and finally flows out of the outside of the motor cavity 1 from the outlet of the outflow channel 42. The air flowing out of the outside of the motor cavity 1 can flow to the compression chamber 1 or the atmosphere. When the air flowing out of the outside of the motor cavity 1 flows to the compression chamber 1, the air is re-compressed by the compression wheel 40 and flows into the heat exchange channel 41 to realize the circulation of the air. When the air flowing out of the outside of the motor cavity 1 flows to the atmosphere, the structure of the air compressor housing 10 is simple, which is conducive to reducing the design difficulty of the air compressor housing 10.

[0050] Reference Figure 1 and Figure 2As shown, an air compressor 100 according to an embodiment of the second aspect of the present invention includes: an air compressor housing 10, a motor 20, a bearing 30 and a pressure wheel 40. The air compressor housing 10 is the air compressor housing 10 of the above-mentioned embodiment. At least a portion of the motor 20 is disposed in the motor cavity 1. The main shaft 201 of the motor 20 is rotatably connected to the inner wall of the motor cavity 1 through the bearing 30. At least a portion of the pressure wheel 40 is disposed in the compression chamber 2. The pressure wheel 40 is transmission-connected to the main shaft 201 of the motor 20. The bearing 30 is suitable for supporting the main shaft 201. The rotation of the main shaft 201 can drive the pressure wheel 40 to rotate synchronously to compress the air.

[0051] According to the air compressor 100 of the embodiment of the present invention, the motor cooling channel 3 on the outside of the motor cavity 1 of the air compressor housing 10 can be passed with coolant to cool the motor 20 and the bearing 30 in the motor cavity 1, thereby realizing liquid cooling of the motor 20 and the bearing 30. The coolant in the motor cooling channel 3 can also cool the air in the heat exchange channel 41 of the bearing cooling channel 4. The cooled air can flow into the motor cavity 1 to cool the motor 20 and the bearing 30, thereby realizing air cooling of the motor 20 and the bearing 30. Cooling the motor 20 and the bearing 30 by a cooling method of air cooling plus water cooling can effectively prevent the temperature of the motor 20 and the bearing 30 from exceeding a preset range, which is beneficial to the stable and reliable operation of the air compressor 100.

[0052] In some embodiments of the present invention, the bearing 30 is a gas bearing, which has the advantages of low wear and loss, high operating precision, and high operating speed, which is conducive to the stable and reliable rotation of the main shaft 201 of the motor 20.

[0053] Specifically, when the air compressor 100 is working, the high-speed rotation of the main shaft 201 (rotor) of the motor 20 can form a high-temperature and high-pressure air film on the top foil of the air bearing 30, and the air film is suitable for lubrication and reliable support of the main shaft 201. The present embodiment cools the motor 20 and the bearing 30 by air cooling plus water cooling, which can improve the cooling efficiency of the motor 20 and the bearing 30, and achieve efficient cooling of the motor 20 and the bearing 30, so that the motor 20 and the bearing 30 can work under ideal heat dissipation, and can effectively avoid the temperature of the air film from continuing to rise, so as to ensure the lubrication effect of the air film, and can reduce the wear between the main shaft 201 of the motor 20 and the bearing 30, which is beneficial to improve the stability of the main shaft 201 and the bearing 30, so as to facilitate the stable and reliable operation of the air compressor 100.

[0054] The fuel cell system according to the third embodiment of the present invention includes the air compressor 100 of the above embodiment.

[0055] According to the fuel cell system of an embodiment of the present invention, the motor cooling channel 3 outside the motor cavity 1 of the air compressor 100 can be passed with coolant to cool the motor 20 and the bearing 30 in the motor cavity 1, thereby realizing liquid cooling of the motor 20 and the bearing 30. The coolant in the motor cooling channel 3 can also cool the air in the heat exchange channel 41 of the bearing cooling channel 4. The cooled air can flow into the motor cavity 1 to cool the motor 20 and the bearing 30, thereby realizing air cooling of the motor 20 and the bearing 30. Cooling the motor 20 and the bearing 30 by a cooling method of air cooling plus water cooling can effectively prevent the temperature of the motor 20 and the bearing 30 from exceeding a preset range, which is beneficial to the stable and reliable operation of the air compressor 100.

[0056] A vehicle according to an embodiment of the fourth aspect of the present invention includes the fuel cell system of the above embodiment.

[0057] According to the vehicle of the embodiment of the present invention, the motor cooling channel 3 outside the motor cavity 1 of the air compressor 100 can be filled with coolant to cool the motor 20 and the bearing 30 in the motor cavity 1, thereby realizing liquid cooling of the motor 20 and the bearing 30. The coolant in the motor cooling channel 3 can also cool the air in the heat exchange channel 41 of the bearing cooling channel 4. The cooled air can flow into the motor cavity 1 to cool the motor 20 and the bearing 30, thereby realizing air cooling of the motor 20 and the bearing 30. Cooling the motor 20 and the bearing 30 by a cooling method of air cooling plus water cooling can effectively prevent the temperature of the motor 20 and the bearing 30 from exceeding a preset range, which is beneficial to the stable and reliable operation of the air compressor 100.

[0058] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0059] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. An air compressor housing, characterized in that: The air compressor housing is used for an air compressor, and the air compressor housing has: A motor cavity (1), the motor cavity (1) being suitable for accommodating a motor (20) and a bearing (30) of the air compressor; A compression chamber (2), the compression chamber (2) being suitable for accommodating a compression wheel (40) drivingly connected to the motor (20); A motor cooling channel (3), wherein the motor cooling channel (3) is arranged outside the motor cavity (1); A bearing cooling channel (4), the bearing cooling channel (4) comprising: a heat exchange channel (41) and an outflow channel (42), the inlet of the heat exchange channel (41) being connected to the compression chamber (2), the outlet of the heat exchange channel (41) being connected to the motor chamber (1), and the heat exchange channel (41) being thermally connected to the motor cooling channel (3), the inlet of the outflow channel (42) being connected to the motor chamber (1), and the outlet of the outflow channel (42) being connected to the outside of the motor chamber (1).

2. The air compressor housing according to claim 1, characterized in that: The heat exchange channel (41) comprises: an inlet section (411), a heat exchange section (412) and an outlet section (413) which are connected in sequence; an end of the inlet section (411) away from the heat exchange section (412) is an inlet of the heat exchange channel (41); an end of the outlet section (413) away from the heat exchange section (412) is an outlet of the heat exchange channel (41); the heat exchange section (412) is thermally connected to the motor cooling channel (3), and at least a portion of the motor cooling channel (3) is located between the heat exchange section (412) and the motor cavity (1).

3. The air compressor housing according to claim 2, characterized in that: The heat exchange section (412) extends in a zigzag manner on a side of the motor cooling channel (3) away from the motor cavity (1).

4. The air compressor housing according to claim 2, characterized in that: The motor cooling channel (3) is spirally wound around the outside of the motor cavity (1).

5. The air compressor casing according to any one of claims 1 to 4, characterized in that: The outlet of the heat exchange flow channel (41) and the inlet of the outflow flow channel (42) are located on both sides of the axial direction of the bearing (30).

6. The air compressor casing according to claim 5, characterized in that: The number of outlets of the heat exchange flow channel (41) is the same as the number of the bearings (30).

7. An air compressor, characterized in that: include: An air compressor housing, wherein the air compressor housing is an air compressor housing according to any one of claims 1 to 6; A motor (20), at least a portion of the motor (20) being disposed in the motor cavity (1); A bearing (30), wherein the main shaft (201) of the motor (20) is rotatably connected to the inner wall of the motor cavity (1) via the bearing (30); A pressure wheel (40), at least a portion of which is disposed in the compression chamber (2), and the pressure wheel (40) is drivingly connected to a main shaft (201) of the motor (20).

8. The air compressor according to claim 7, characterized in that: The bearing (30) is a gas bearing.

9. A fuel cell system, characterized in that: Comprising an air compressor according to claim 7 or 8.

10. A vehicle, characterized in that: Comprising the fuel cell system according to claim 9.

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