Cooling structure for control panel in electronic water pump

Abstract

The utility model relates to a control panel cooling structure in an electronic water pump, which comprises a water pump shell, and a water inlet and a water outlet communicated with each other are arranged at the front end of the water pump shell; a motor front end cover and a motor rear end cover are installed at the front end and the rear end in the water pump shell respectively, a motor stator and a motor rotor are installed in the middle of the water pump shell, an impeller is installed at the front end of the motor rotor, the motor stator is located on the periphery of the motor rotor, and a shielding sleeve is arranged between the motor stator and the motor rotor. The water pump can provide enough cooling liquid to cool electronic components on the back of the controller, meanwhile, the temperature in the control cavity is reduced, and the effective service life of the controller is guaranteed. In order to meet the insulation requirement of the electronic water pump medium for the hydrogen fuel cell, the cooling water pipe is made of engineering plastics, meanwhile, the cooling water pipe installation channel is arranged in the inner cavity of the machine shell, the cooling water pipe can be directly fixed to a connector on the water channel in the assembling process, and the structure is a water cooling structure, good in cooling effect and easy and reliable to assemble.

Description

Technical Field

[0001] The utility model belongs to the technical field of water pumps and relates to a cooling structure of a control panel in an electronic water pump. Background Art

[0002] When the water pump is operating, the controller's power module, capacitors, and inductors generate a significant amount of heat, requiring timely heat dissipation to prevent it from significantly impacting the reliability of the power module's chips. As the pump's power increases, the integrated IPM module can no longer meet the power requirements.

[0003] The existing device has the following problems: the absorption capacitor and other components arranged on the control board behind the power board also generate heat during operation, but cannot be properly cooled, and usually cannot meet the operating temperature requirements of the electronic components. Summary of the Invention

[0004] The purpose of the utility model is to provide a cooling structure for a control panel in an electronic water pump, which can solve the above-mentioned problems and has simple and reliable assembly.

[0005] According to the technical solution provided by the utility model: a cooling structure of a control board in an electronic water pump, comprising a water pump housing, a front end of the water pump housing being provided with a connected water inlet and water outlet; a motor front end cover and a motor rear end cover are respectively installed at the front and rear ends of the water pump housing, a motor stator and a motor rotor are installed in the middle of the water pump housing, an impeller is installed at the front end of the motor rotor, the motor stator is located at the outer periphery of the motor rotor, a shielding sleeve is provided between the motor stator and the motor rotor, a control board is placed at the rear end of the water pump housing, and the front and rear sides of the control board are closely attached to the connected first cooling box and the second cooling box; a first water inlet channel and a first water return channel are provided in the first cooling box, the two ends of the first water inlet hole are respectively the first water inlet upper end and the first water inlet lower end, and the two ends of the first return hole are respectively the first return water upper end and the first return water lower end; a bent cooling channel is provided in the second cooling box, and the two ends of the bent cooling channel are the cooling water inlet end and the cooling water return end; the first water inlet lower end is connected to the cooling water inlet end, and the cooling water return end is connected to the first return water lower end through a water pipe.

[0006] As a further improvement of the present invention, the motor rotor is rotatably mounted in the water pump housing via a front bearing and a rear bearing, and the front bearing and the rear bearing are respectively mounted in the front end cover and the rear end cover of the motor.

[0007] As a further improvement of the present invention, the shielding sleeve is installed between the front end cover and the rear end cover of the motor to enclose a rotor cavity.

[0008] As a further improvement of the present invention, the first cooling box is connected to the rear end cover of the motor as a whole by fixing screws.

[0009] As a further improvement of the present invention, the second cooling box is made of aluminum plates by laser welding.

[0010] As a further improvement of the present invention, an end cover water inlet hole is provided at the lower part of the rear end cover of the motor, which connects the upper end of the first water inlet and the rotor cavity; an end cover return hole is provided in the middle of the rear end cover of the motor, which connects the upper end of the first water return and the rotor cavity.

[0011] As a further improvement of the present invention, a rotor return hole is axially passed through the motor rotor, and an impeller return hole is axially passed through the impeller.

[0012] As a further improvement of the present invention, insulating heat-conducting gaskets are attached to the front and rear of the second cooling box.

[0013] The positive progress of this application is:

[0014] The water pump in this utility model provides sufficient coolant to cool the electronic components on the back of the controller, while also reducing the temperature within the control cavity and ensuring the effective life of the controller. To meet the dielectric insulation requirements of the electronic water pump for hydrogen fuel cells, the cooling water pipe is made of engineering plastic. The cooling water pipe mounting channel is arranged within the inner cavity of the housing. During assembly, the cooling water pipe can be directly fixed to the connector on the water channel. This water-cooled structure has excellent cooling effect and is simple and reliable to assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the present utility model.

[0016] Figure 2 This is a schematic structural diagram of the second cooling box in the present invention.

[0017] Figure 1-Figure 2 The invention comprises an impeller 1, a motor front end cover 2, a water pump housing 3, a motor stator 4, a shielding sleeve 5, a first cooling box 6, a motor rear end cover 7, a second cooling box 8, a front bearing 9, a control board 10, a rubber pad 11, a motor rotor 12, a rear shaft sleeve 13, a rear bearing 14, a rotor cavity 15, a water inlet 16, a water outlet 17, a water pipe 18, an insulating thermal gasket 19, etc. DETAILED DESCRIPTION

[0018] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0019] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0020] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate for the embodiments of the present invention described herein. In addition, similar terms such as "including" and "having" mean that in addition to those contents already listed in "including" and "having", other contents that have not been listed may also be "included" and "having"; for example, a process, method, system, product or device that may include a series of steps or units is not necessarily limited to those steps or units that have been clearly listed, but may include other steps or units that are not clearly listed or are inherent to these processes, methods, products or devices.

[0021] Due to the angle of the drawing, some components may not be drawn, but their positions and connection relationships can be partially understood based on the text.

[0022] like Figure 1 As shown, the utility model is a cooling structure for a control board in an electronic water pump, comprising a water pump housing 3, wherein the front end of the water pump housing 3 is provided with a connected water inlet 16 and a water outlet 17; a motor front end cover 2 and a motor rear end cover 7 are respectively installed at the front and rear ends of the water pump housing 3, a motor stator 4 and a motor rotor 12 are installed in the middle of the water pump housing 3, an impeller 1 is installed at the front end of the motor rotor 12, the motor stator 4 is located at the outer periphery of the motor rotor 12, a shielding sleeve 5 is provided between the motor stator 4 and the motor rotor 12, a control board 10 is placed at the rear end of the water pump housing 3, and the front and rear sides of the control board 10 are tightly attached to the connected first cooling box 6 and the second cooling box 8.

[0023] The motor rotor 12 is rotatably mounted in the water pump housing 3 via a front bearing 9 and a rear bearing 14 . The front bearing 9 and the rear bearing 14 are respectively mounted in the motor front end cover 2 and the motor rear end cover 7 .

[0024] The shielding sleeve 5 is installed between the front end cover 2 and the rear end cover 7 of the motor to form a rotor cavity 15 .

[0025] The first cooling box 6 is connected to the motor rear end cover 7 by fixing screws. The first cooling box 6 is provided with a first water inlet and a first water return. The two ends of the first water inlet are respectively the first water inlet upper end and the first water inlet lower end, and the two ends of the first water return are respectively the first water return upper end and the first water return lower end. Figure 2 As shown, the second cooling box 8 is made of laser-welded aluminum plates, and the flow channel is sealed reliably through airtightness testing. A curved cooling channel 8-1 is provided in the second cooling box 8, with a cooling water inlet 8-2 and a cooling water return 8-3 at either end. The lower end of the first water inlet is connected to the cooling water inlet 8-2, and the cooling water return 8-3 is connected to the lower end of the first water return via a water pipe 18.

[0026] An end cover water inlet hole 7-1 is provided at the lower part of the rear end cover 7 of the motor, and the end cover water inlet hole 7-1 communicates with the upper end of the first water inlet and the rotor cavity 15; an end cover return hole 7-2 is provided in the middle of the rear end cover 7 of the motor, and the end cover return hole 7-2 communicates with the upper end of the first water return and the rotor cavity 15.

[0027] The motor rotor 12 has a rotor return hole extending axially therethrough, and the impeller 1 has an impeller return hole extending axially therethrough.

[0028] The working process of this utility model is as follows:

[0029] The medium flows from the water inlet 16 into the end of the water pump housing 3. The motor rotor 12 rotates, and the impeller 1 discharges most of the medium from the water outlet 17. A portion of the medium flows into the interior of the water pump housing 3, passes through the front bearing 9, flows into the rotor cavity 15, and then flows into the first cooling box 6 and the second cooling box 8 through the end cover water inlet hole 7-1. It then flows back through the first cooling box 6, the rotor cavity 15, the rotor return hole, and the impeller return hole to the front end of the motor rotor 12, completing the circulation of the medium. The medium cools the front and rear bearings and the motor rotor and other components. At the same time, the heat generated by the power module on the left end of the control board 10 is carried away by the medium flowing in the first cooling box 6, and the heat generated by the capacitor and inductor modules on the right end of the control board 10 is mainly carried away by the flowing medium inside the second cooling box 8.

[0030] The water pump housing 3 is a split-body structure, with the front, middle, and rear ends comprising the volute, motor housing, and rear cover, respectively. The volute is made of plastic, while the motor housing and rear cover are made of metal. When the water pump is conveying dielectric fluid, the volute is insulated due to its material, while a shielding sleeve 5 is installed in the motor housing for insulation. Insulating thermal pads 19 are attached to the front and rear of the second cooling box 8 to prevent current from passing through the rear cover and control board 10. This ensures both dielectric insulation and heat transfer to the flowing medium.

Claims

1. A cooling structure for a control panel in an electronic water pump, comprising a water pump housing (3), wherein a front end portion of the water pump housing (3) is provided with a water inlet (16) and a water outlet (17) connected to each other; characterized in that: A motor front end cover (2) and a motor rear end cover (7) are respectively installed at the front and rear ends of the water pump housing (3); a motor stator (4) and a motor rotor (12) are installed in the middle of the water pump housing (3); an impeller (1) is installed at the front end of the motor rotor (12); the motor stator (4) is located on the outer periphery of the motor rotor (12); a shielding sleeve (5) is provided between the motor stator (4) and the motor rotor (12); a control board (10) is placed at the rear end of the water pump housing (3); and the front and rear sides of the control board (10) are closely attached to a first cooling box (6) and a second cooling box (8) that are connected to each other; A first water inlet channel and a first water return channel are provided in the first cooling box (6), the two ends of the first water inlet hole are respectively the first water inlet upper end and the first water inlet lower end, and the two ends of the first water return hole are respectively the first water return upper end and the first water return lower end; a bent cooling channel (8-1) is provided in the second cooling box (8), the two ends of the bent cooling channel (8-1) are respectively the cooling water inlet end (8-2) and the cooling water return end (8-3); the first water inlet lower end is connected to the cooling water inlet end (8-2), and the cooling water return end (8-3) is connected to the first water return lower end via a water pipe (18).

2. The cooling structure for the control board in the electronic water pump according to claim 1, characterized in that: The motor rotor (12) is rotatably mounted in the water pump housing (3) via a front bearing (9) and a rear bearing (14). The front bearing (9) and the rear bearing (14) are respectively mounted in the motor front end cover (2) and the motor rear end cover (7).

3. The cooling structure for the control board in the electronic water pump according to claim 1, wherein: The shielding sleeve (5) is installed between the front end cover (2) and the rear end cover (7) of the motor to form a rotor cavity (15).

4. The cooling structure for the control board in the electronic water pump according to claim 1, wherein: The first cooling box (6) is connected to the motor rear end cover (7) by fixing screws.

5. The cooling structure for the control board in the electronic water pump according to claim 1, wherein: The second cooling box (8) is made of aluminum plates welded together.

6. The cooling structure for the control board in the electronic water pump according to claim 1, wherein: An end cover water inlet hole (7-1) is provided at the lower portion of the rear end cover (7) of the motor, and the end cover water inlet hole (7-1) is connected to the upper end of the first water inlet and the rotor cavity (15); an end cover water return hole (7-2) is provided in the middle of the rear end cover (7) of the motor, and the end cover water return hole (7-2) is connected to the upper end of the first water return and the rotor cavity (15).

7. The cooling structure for the control board in the electronic water pump according to claim 1, wherein: A rotor return hole is axially passed through the motor rotor (12), and an impeller return hole is axially passed through the impeller (1).

8. The cooling structure for the control board in the electronic water pump according to claim 1, wherein: Insulating heat-conducting pads (19) are attached to the front and rear of the second cooling box (8).

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