An air-cooled integrated motor controller housing

Abstract

The application discloses a kind of air-cooled integrated motor controller shell, including shell main body, bearing rear cover is positioned in the middle of the rear end of the shell main body, the rear end surface of the shell main body is profiled with heat dissipation fin, the back bottom of the shell main body is positioned with connector support, the back upper end of the shell main body is provided with wiring cover, the lower position of the shell main body is provided with waterproof breather valve reserved mouth, the middle part in the shell main body is provided with bearing chamber.The air-cooled integrated motor controller shell of the application is cooled by air according to the air outlet of motor operation, the thickness of the whole machine is greatly reduced by integrated design of bearing chamber, high-low pressure retaining wall inhibits electromagnetic crosstalk, detachable wiring cover facilitates motor and controller split disassembly and maintenance, shell multilayer composite matrix gives consideration to structural strength, heat conduction and insulation performance, suitable for 2kW integrated permanent magnet synchronous air-cooled motor batch production use.

Description

Technical Field

[0001] This invention relates to the field of permanent magnet synchronous motor controller housing technology, and particularly to an air-cooled integrated motor controller housing. Background Technology

[0002] Existing integrated permanent magnet synchronous motors mostly adopt a separate structure for the motor and controller. The controller housing and the rear end cover of the motor are assembled independently, resulting in a large axial stacking size of the whole machine and difficulty in compressing the thickness of the equipment. Conventional electrical control housings rely on independent water cooling or external cooling fans for heat dissipation, which increases the cost of components and the size of the whole machine. They do not utilize the airflow generated by the motor's own operation to assist in heat dissipation. With the continuous development of technology, people's requirements for motor controller housings are also getting higher and higher.

[0003] Traditional controller housings lack partitioned isolation for high and low voltage wiring, with power devices (IGBTs), low-voltage signal lines, and high-voltage busbars sharing the same cavity. This leads to electromagnetic interference between the high and low voltage circuits during operation, easily causing distortion of motor control signals and operational jitter. Furthermore, conventional wiring terminals are integrated inside the housing, requiring complete disassembly of the motor and controller for maintenance and reassembly, making the process cumbersome. Traditional electrical control housings use only a single aluminum alloy base, resulting in poor overall thermal conductivity, insulation, and heat dissipation performance. The lack of dedicated waterproof and breathable structures means that condensation caused by temperature changes inside the cavity can easily lead to short circuits and damage to components. Existing motor controllers... The bearing mounting position is independently located on the rear end cover of the motor, and the controller housing only serves to support the electronic control components. This results in low integration, numerous assembly parts, and low assembly efficiency, failing to meet the mass production requirements of miniaturized air-cooled integrated motors. Currently, electronic control cooling solutions fall into two categories: pure water cooling and external independent fan cooling. Water cooling requires a water pump, water connectors, and a liquid storage tank, leading to complex piping and a high risk of leakage. External fan cooling requires a separately designed fan bracket and power supply harness, adding extra components, overall weight, and material costs. Furthermore, it does not utilize the axial airflow naturally generated by the motor rotor, resulting in low energy efficiency. Conventional housings use only a single die-cast aluminum alloy material with limited thermal conductivity. During high-power IGBT operation, heat accumulation can easily lead to overheating and power reduction. Therefore, we propose an air-cooled integrated motor controller housing. Summary of the Invention

[0004] Technical problem solved: In view of the shortcomings of the prior art, the present invention provides a wind-cooled integrated motor controller housing, which realizes the effects of motor exhaust air-assisted electronic control air-cooling heat dissipation, overall miniaturization, high and low voltage electromagnetic isolation, quick disassembly and assembly, and high thermal conductivity composite housing integrated molding, which can effectively solve the problems in the background art.

[0005] Technical Solution: To achieve the above objectives, the technical solution adopted by this invention is as follows: A wind-cooled integrated motor controller housing, comprising a housing body, a bearing rear cover positioned at the middle of the rear end of the housing body, heat dissipation fins formed on the rear surface of the housing body, a connector support positioned at the bottom of the back of the housing body, a wiring cover provided at the upper end of the back of the housing body, a waterproof and ventilated valve reserved opening at the lower position of the housing body, a bearing chamber provided in the middle of the housing body, a first high-low voltage zone electromagnetic isolation barrier and a second high-low voltage zone electromagnetic isolation barrier positioned near the bottom of the housing body, a fixing bracket and an IGBT assembly positioned near the upper end of the housing body, an angle bracket integrally formed on the outer wall of the housing body, a pin hole provided on the angle bracket, a plug-in port provided inside the connector support, a sealing ring positioned on the outer ring of the housing body, a wind-cooled base positioned on the outer wall of the housing body, an air outlet mesh positioned at the front end of the wind-cooled base, a circulating water cooling base fixed at the rear end of the wind-cooled base, and a circulating water tank positioned on the back of the circulating water cooling base.

[0006] As a preferred technical solution of this application, the housing body includes a housing base, an aluminum interlayer sheet, a ceramic silicone rubber sheet, an aluminum substrate sheet, and a graphene sheet. The aluminum interlayer sheet is located on the surface of the housing base, the ceramic silicone rubber sheet is located on the surface of the aluminum interlayer sheet, the aluminum substrate sheet is located on the surface of the ceramic silicone rubber sheet, and the graphene sheet is located on the surface of the aluminum substrate sheet.

[0007] As a preferred technical solution of this application, the housing body and the heat dissipation fins are integrally formed by die casting, and the housing body is fixed to the wiring cover, connector support and bearing rear cover by screws.

[0008] As a preferred technical solution of this application, the housing body is assembled and fixed with the cover body through corner brackets, pin holes, and the housing body is fixed with the first high and low voltage zone electromagnetic isolation barrier and the second high and low voltage zone electromagnetic isolation barrier by screws.

[0009] As a preferred technical solution of this application, the IGBT component is fixed between the inner side of the fixing bracket and the housing body, and the outer ring of the housing body is sealed and positioned between the sealing ring and the cover.

[0010] As a preferred technical solution of this application, the shell base, aluminum interlayer sheet, ceramic silicone rubber sheet, aluminum substrate sheet and graphene sheet are integrally formed by die casting.

[0011] As a preferred technical solution of this application, the air-cooled base is internally assembled with a fan base, the fan base is internally equipped with a fan, the circulating water-cooled base is internally equipped with a circulation pipe, one end of the circulating water-cooled base is provided with a water inlet hole, the other end of the circulating water-cooled base is provided with a first return water hole, one end of the circulating water tank is provided with a water outlet hole, the other end of the circulating water tank is provided with a second return water hole, a filter screen is positioned in the middle of the circulating water tank, a condenser is positioned on the surface of the circulating water tank, a water outlet pipe is connected between the water inlet hole and the water outlet hole, and a return water pipe is connected between the first return water hole and the second return water hole.

[0012] As a preferred technical solution of this application, the cooling water inside the circulating water tank enters the circulating pipe through the water outlet, water outlet pipe and water inlet and circulates inside the circulating pipe, and finally is pumped back into the circulating water tank through the first return water hole and the second return water hole.

[0013] Beneficial effects: Compared with the prior art, the present invention provides an air-cooled integrated motor controller housing, which has the following beneficial effects: The air-cooled integrated motor controller housing significantly reduces the overall thickness and improves the integration. The bearing chamber is directly integrally formed inside the housing body, eliminating the need for a separate rear bearing cover for the motor. The controller housing simultaneously undertakes the dual functions of supporting the electrical control components and installing the motor bearing, eliminating the need for a separate installation structure between the motor and the controller. The overall axial thickness is significantly shortened, making it suitable for the miniaturized design of a 2kW small integrated permanent magnet synchronous motor.

[0014] The optimized air-cooling structure eliminates the need for an additional cooling fan: the integrated die-cast heat sink at the rear of the housing allows the airflow generated by the motor to flow directly over the surface of the heat sink and carry away the heat generated by the IGBT components; the graphene composite layer inside the housing conducts heat quickly, and the motor's own airflow can meet the continuous heat dissipation needs of the electronic control system, reducing the number of independent heat dissipation components and lowering the overall cost and weight of the machine.

[0015] Double-layer high and low voltage isolation barriers suppress electromagnetic interference: The housing is equipped with first and second double-layer high and low voltage electromagnetic isolation barriers to isolate the high-voltage power device IGBT from the low-voltage control harness, block electromagnetic radiation and coupling interference between high and low voltage circuits, avoid control signal distortion, and improve the stability of motor operation.

[0016] The removable rear wiring cover facilitates easy disassembly and maintenance: The wiring cover is located on the upper back of the housing and is fixed with screws. During maintenance, only the wiring cover needs to be removed to operate the wiring terminals. At the same time, the motor and controller modules can be quickly separated, simplifying the assembly and maintenance process and improving mass production assembly efficiency.

[0017] Multi-layer composite shell matrix, combining thermal conductivity and insulation: The main body of the shell is die-cast composite molded from aluminum, ceramic silicone rubber and graphene multi-layer structure. The graphene layer is bonded to the IGBT to achieve rapid heat conduction, the ceramic silicone rubber layer provides insulation barrier, and the aluminum alloy matrix ensures structural strength. A single shell has multiple properties such as high strength, high thermal conductivity, insulation and short circuit protection.

[0018] Waterproof and breathable pre-reserved structure enhances cavity protection: Waterproof and breathable valve pre-reserved openings are provided on the side wall of the shell, which can be installed to balance the air pressure inside and outside the shell, eliminate internal condensation caused by temperature changes, and prevent IGBTs and wiring terminals from getting damp and short-circuiting; the outer ring sealing ring works with the end cap to achieve overall sealing, resulting in a higher level of protection.

[0019] Air-cooled + water-cooled composite heat dissipation: Basic heat dissipation relies on the motor's native airflow for air cooling, which meets the needs of normal light-load conditions; under long-term full-load and high-temperature environments, the air-cooled chassis fan can be activated to accelerate airflow, and the water-cooled circulation system can be activated simultaneously to remove excess heat. The dual heat dissipation mode is compatible with short-term peak loads and long-term continuous working scenarios, broadening the applicable conditions of the motor drive system. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a wind-cooled integrated motor controller housing according to the present invention.

[0021] Figure 2 This is a schematic diagram of the internal structure of one side of the housing of an air-cooled integrated motor controller according to the present invention.

[0022] Figure 3 This is a schematic diagram of the back of the housing of an air-cooled integrated motor controller according to the present invention.

[0023] Figure 4 This is a schematic diagram of the structure of the other side inside the housing of an air-cooled integrated motor controller according to the present invention.

[0024] Figure 5 This is a structural schematic diagram of the exploded view of the housing body in the air-cooled integrated motor controller housing of the present invention.

[0025] Figure 6 This is a structural schematic diagram of the main body of the housing in the air-cooled integrated motor controller housing of the present invention.

[0026] Figure 7 This is a schematic diagram of the overall structure of the air-cooled base in the housing of an air-cooled integrated motor controller according to the present invention.

[0027] Figure 8 This is a schematic diagram of the structure of the air-cooled base in the housing of an air-cooled integrated motor controller according to the present invention.

[0028] Figure 9This is a schematic diagram of the structure of the circulating water cooling base in the housing of an air-cooled integrated motor controller according to the present invention.

[0029] Figure 10 This is a schematic diagram of the circulating water tank in the housing of an air-cooled integrated motor controller according to the present invention.

[0030] In the diagram: 1. Housing body; 2. Wiring cover; 3. Heat sink fins; 4. Bearing rear cover; 5. Waterproof and ventilated valve pre-drilled opening; 6. Angle bracket; 7. Pin hole; 8. Insertion port; 9. Connector support; 10. Fixing bracket; 11. Sealing ring; 12. IGBT assembly; 13. Bearing chamber; 14. Electromagnetic isolation barrier for the first high and low voltage zone; 15. Electromagnetic isolation barrier for the second high and low voltage zone; 16. Housing base; 17. 18. Aluminum sandwich sheet; 19. Ceramic silicone rubber sheet; 20. Aluminum substrate sheet; 21. Graphene sheet; 22. Air-cooled base; 23. Circulating water tank; 24. Water outlet pipe; 25. Air outlet screen; 26. Circulating water-cooled base; 27. Water return pipe; 28. Fan base; 29. ​​Fan; 30. Water inlet; 31. Circulating pipe; 32. First water return hole; 33. Condenser; 34. Water outlet hole; 35. Filter screen; 36. Second water return hole. Detailed Implementation

[0031] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. However, those skilled in the art will understand that the embodiments described below are some embodiments of the present invention, but not all embodiments, and are only used to illustrate the present invention, and should not be regarded as limiting the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall be followed. Where the manufacturers of reagents or instruments are not specified, they are all conventional products that can be purchased commercially.

[0032] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0034] like Figure 1-10 As shown, a wind-cooled integrated motor controller housing includes a housing body 1. A bearing rear cover 4 is positioned at the middle of the rear end of the housing body 1. Heat dissipation fins 3 are formed on the rear surface of the housing body 1. A connector support 9 is positioned at the bottom of the back of the housing body 1. A wiring cover 2 is provided at the upper end of the back of the housing body 1. A waterproof and ventilated valve reserved opening 5 is provided at the lower position of the housing body 1. A bearing chamber 13 is provided in the middle of the housing body 1. A first high and low voltage zone electromagnetic isolation barrier 14 and a second high and low voltage zone electromagnetic isolation barrier 15 are positioned near the bottom of the housing body 1. A fixing bracket 10 and an IGBT assembly 12 are positioned near the upper end of the housing body 1. An angle bracket 6 is integrally formed on the outer wall of the housing body 1. The code 6 has a pin hole 7, the connector support 9 has a plug-in port 8, the outer ring of the housing body 1 is positioned with a sealing ring 11, the outer wall of the housing body 1 is positioned with an air-cooled base 21, the front end of the air-cooled base 21 is positioned with an air outlet 24, the rear end of the air-cooled base 21 is fixed with a circulating water cooling base 25, and the back of the circulating water cooling base 25 is positioned with a circulating water tank 22. The air-cooled heat dissipation of the motor is achieved by relying on the air outlet of the motor. The integrated design of the bearing chamber greatly reduces the thickness of the whole machine. The high and low voltage baffles suppress electromagnetic crosstalk. The detachable wiring cover facilitates the separate disassembly and maintenance of the motor and controller. The multi-layer composite matrix of the housing takes into account the structural strength, thermal conductivity and insulation performance. It is suitable for mass production of 2kW integrated permanent magnet synchronous air-cooled motors.

[0035] The main body 1 of the housing includes a housing base 16, an aluminum interlayer sheet 17, a ceramic silicone rubber sheet 18, an aluminum substrate sheet 19, and a graphene sheet 20. The aluminum interlayer sheet 17 is located on the surface of the housing base 16, the ceramic silicone rubber sheet 18 is located on the surface of the aluminum interlayer sheet 17, the aluminum substrate sheet 19 is located on the surface of the ceramic silicone rubber sheet 18, and the graphene sheet 20 is located on the surface of the aluminum substrate sheet 19.

[0036] The housing body 1 and the heat dissipation fins 3 are integrally formed by die casting. The housing body 1 is fixed to the wiring cover 2, the connector support 9 and the bearing rear cover 4 by screws. The housing body 1 is assembled and fixed to the cover by the corner bracket 6 and the pin hole 7. The housing body 1 is fixed to the first high and low voltage zone electromagnetic isolation barrier 14 and the second high and low voltage zone electromagnetic isolation barrier 15 by screws. The IGBT assembly 12 is locked in the inner side of the fixing bracket 10 and fixed to the housing body 1. The outer ring of the housing body 1 is sealed and positioned between the cover by the sealing ring 11.

[0037] The main body of the housing 1 adopts a multi-layer composite die-casting structure, consisting of a housing base 16, an aluminum interlayer sheet 17, a ceramic silicone rubber sheet 18, an aluminum substrate sheet 19, and a graphene sheet 20, from the outside to the inside. The five layers are composited into one unit by high-pressure die-casting. The graphene sheet 20 is arranged close to the IGBT module 12 to quickly conduct the heat of the power device to the rear heat dissipation fins 3. The ceramic silicone rubber sheet 18 isolates the high and low voltage circuits to prevent the housing from conducting electricity and causing short circuits. The aluminum alloy interlayer ensures the rigidity of the housing structure and meets the requirements of the whole machine assembly and vibration conditions.

[0038] The air-cooled base 21 is internally assembled with a fan base 27, and a fan 28 is installed inside the fan base 27. The circulating water-cooled base 25 is internally equipped with a circulation pipe 30. One end of the circulating water-cooled base 25 is provided with a water inlet 29, and the other end of the circulating water-cooled base 25 is provided with a first return water hole 31. One end of the circulating water tank 22 is provided with a water outlet 33, and the other end of the circulating water tank 22 is provided with a second return water hole 35. A filter screen 34 is positioned in the middle of the circulating water tank 22, and a condenser 32 is positioned on the surface of the circulating water tank 22. A water outlet pipe 23 is connected between the water inlet 29 and the water outlet 33, and a return water pipe 26 is connected between the first return water hole 31 and the second return water hole 35. The cooling water inside the circulating water tank 22 enters the circulation pipe 30 through the water outlet 33, the water outlet pipe 23, and the water inlet 29 for circulation, and finally passes through the first return water hole 31 and the second return water hole 35 and is pumped back into the circulating water tank 22.

[0039] Working principle: This invention includes a housing body 1, a wiring cover 2, heat dissipation fins 3, a bearing rear cover 4, a waterproof and breathable valve reserved port 5, an angle bracket 6, a pin hole 7, a plug-in port 8, a connector support 9, a fixing bracket 10, a sealing ring 11, an IGBT assembly 12, a bearing chamber 13, an electromagnetic isolation barrier for the first high and low voltage zone 14, an electromagnetic isolation barrier for the second high and low voltage zone 15, a housing base 16, an aluminum sandwich sheet 17, a ceramic silicone rubber sheet 18, an aluminum substrate sheet 19, and a graphene sheet 20. After the entire machine is assembled, the motor generates axial airflow, which directly washes over the heat dissipation fins 3 at the rear end of the housing. The heat generated by the IGBT assembly 12 is quickly conducted to the heat dissipation fins through the graphene composite layer inside the housing. The airflow from the motor itself is used for air cooling, eliminating the need for an additional cooling fan.

[0040] The double-layer high and low voltage electromagnetic isolation barrier inside the housing divides the high voltage power components and low voltage control wiring harness into zones, blocking electromagnetic coupling between high and low voltage circuits and ensuring stable motor control signals; the one-piece molded bearing chamber 13 in the center of the housing directly supports the motor bearing, eliminating the need for an independent rear end installation structure and significantly reducing the overall thickness of the machine.

[0041] During equipment inspection and maintenance, the internal wiring terminals can be operated by simply removing the back wiring cover 2. After loosening the locking screws of the housing and motor end cover, the controller housing and motor body can be completely separated, making the disassembly and assembly process simple. After installing the vent valve in the reserved port 5 of the side wall waterproof vent valve, the air pressure inside and outside the housing is balanced, internal condensation is eliminated, and the service life of the electrical control components is extended.

[0042] It should be noted that, in this document, relational terms such as first and second (number one, number two), etc., are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A wind-cooled integrated motor controller housing, comprising a housing body (1), characterized in that: A bearing cover (4) is positioned at the middle of the rear end of the housing body (1). Heat dissipation fins (3) are formed on the rear surface of the housing body (1). A connector support (9) is positioned at the bottom of the back of the housing body (1). A wiring cover (2) is provided at the upper end of the back of the housing body (1). A waterproof and breathable valve reserved opening (5) is provided at the lower position of the housing body (1). A bearing chamber (13) is provided in the middle of the housing body (1). A first high and low voltage zone electromagnetic isolation barrier (14) and a second high and low voltage zone electromagnetic isolation barrier (15) are positioned near the bottom of the housing body (1). The inner part near the upper end is positioned with a fixed bracket (10) and an IGBT assembly (12). The outer wall of the housing body (1) is integrally formed with a corner bracket (6). The corner bracket (6) is provided with a pin hole (7). The connector support (9) is provided with a plug-in port (8). The outer ring of the housing body (1) is positioned with a sealing ring (11). The outer wall of the housing body (1) is positioned with an air-cooled base (21). The front end of the air-cooled base (21) is positioned with an air outlet net (24). The rear end of the air-cooled base (21) is fixed with a circulating water cooling base (25). The back of the circulating water cooling base (25) is positioned with a circulating water tank (22).

2. The air-cooled integrated motor controller housing according to claim 1, characterized in that: The main body of the shell (1) includes a shell base (16), an aluminum interlayer sheet (17), a ceramic silicone rubber sheet (18), an aluminum substrate sheet (19), and a graphene sheet (20). The aluminum interlayer sheet (17) is located on the surface of the shell base (16), the ceramic silicone rubber sheet (18) is located on the surface of the aluminum interlayer sheet (17), the aluminum substrate sheet (19) is located on the surface of the ceramic silicone rubber sheet (18), and the graphene sheet (20) is located on the surface of the aluminum substrate sheet (19).

3. The air-cooled integrated motor controller housing according to claim 1, characterized in that: The housing body (1) and the heat dissipation fins (3) are integrally formed by die casting. The housing body (1) is fixed to the wiring cover (2), the connector support (9) and the bearing rear cover (4) by screws.

4. The air-cooled integrated motor controller housing according to claim 1, characterized in that: The housing body (1) is assembled and fixed to the cover through corner brackets (6) and pin holes (7). The housing body (1) is fixed to the first high and low voltage zone electromagnetic isolation barrier (14) and the second high and low voltage zone electromagnetic isolation barrier (15) through screws.

5. The air-cooled integrated motor controller housing according to claim 1, characterized in that: The IGBT assembly (12) is engaged with the inner side of the fixing bracket (10) and fixed between it and the housing body (1). The outer ring of the housing body (1) is sealed and positioned between it and the cover by the sealing ring (11).

6. The air-cooled integrated motor controller housing according to claim 2, characterized in that: The shell base (16), aluminum interlayer sheet (17), ceramic silicone rubber sheet (18), aluminum substrate sheet (19) and graphene sheet (20) are integrally formed by die casting.

7. The air-cooled integrated motor controller housing according to claim 1, characterized in that: The air-cooled base (21) is internally assembled with a fan base (27), and the fan base (27) is internally equipped with a fan (28). The circulating water-cooled base (25) is internally equipped with a circulation pipe (30). One end of the circulating water-cooled base (25) is provided with a water inlet (29), and the other end of the circulating water-cooled base (25) is provided with a first return water hole (31). One end of the circulating water tank (22) is provided with a water outlet (33), and the other end of the circulating water tank (22) is provided with a second return water hole (35). A filter screen (34) is positioned in the middle of the circulating water tank (22), and a condenser (32) is positioned on the surface of the circulating water tank (22). A water outlet pipe (23) is connected between the water inlet (29) and the water outlet (33), and a return water pipe (26) is connected between the first return water hole (31) and the second return water hole (35).

8. The air-cooled integrated motor controller housing according to claim 7, characterized in that: The cooling water inside the circulating water tank (22) enters the circulating pipe (30) through the outlet hole (33), outlet pipe (23), and inlet hole (29) for circulation, and finally passes through the first return water hole (31) and the second return water hole (35) to be pumped back into the circulating water tank (22).

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