Electronic water pump

Abstract

The invention relates to an electronic water pump, and relates to the technical field of water pumps, the electronic water pump comprises a motor, a pump shell and an impeller, the motor comprises a motor shaft, the motor shaft is provided with an overflowing hole, the overflowing hole penetrates through the motor shaft in the axis direction, the motor shaft is provided with an adjusting part, and the adjusting part is used for adjusting the overflowing flow of the overflowing hole. The water pump has the advantages that the heat dissipation effect can be guaranteed, and the influence of temperature on the stability and service life of the water pump is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of water pumps, and in particular to an electronic water pump. Background Art

[0002] With the development of the automotive industry, the performance and reliability requirements of automobiles are increasing day by day. As a key component in the cooling system, the main function of automotive electronic water pumps is to provide coolant circulation for the engine and other important electronic components to prevent overheating. However, traditional electronic water pumps are usually unable to make intelligent adjustments according to changes in the working environment, resulting in insufficient cooling effect under high load, affecting overall performance and reliability.

[0003] At the same time, as the integration of electronic components becomes higher and higher, the printed circuit board in the electronic water pump has become a high heat load point in the system. Traditional cooling methods cannot effectively solve the heat dissipation problem of the circuit board, which may cause the operating temperature to exceed the critical value, thus affecting the stability and life of the water pump. Summary of the invention

[0004] In view of the deficiencies in the prior art, one of the purposes of the present application is to provide an electronic water pump, which has the advantages of being able to ensure heat dissipation and reduce the impact of temperature on the stability and life of the water pump.

[0005] The above-mentioned purpose of the present application is achieved through the following technical solutions:

[0006] An electronic water pump comprises a motor, a pump casing and an impeller. The motor comprises a motor shaft, a flow hole is arranged on the motor shaft, the flow hole penetrates the motor shaft along the axial direction, and an adjusting member is arranged on the motor shaft, the adjusting member is used to adjust the flow rate of the flow hole.

[0007] By adopting the above technical solution, during use, the flow rate of the flow hole is adjusted by the adjusting member, so that the purpose of adjusting the flow rate according to the temperature can be achieved, thereby reducing the influence of temperature on the stability and life of the water pump.

[0008] In a preferred example, the present application can be further configured as follows: a mounting cavity is provided on the motor, the mounting cavity is used to mount a circuit board, and the flow hole is connected to the mounting cavity.

[0009] By adopting the above technical solution, the cooling effect of the circuit board is improved.

[0010] In a preferred example, the present application can be further configured as follows: it also includes a temperature measurement module and a control module, the control module obtains the temperature detected by the temperature measurement module, adjusts the adjustment component according to the temperature, and adjusts the flow rate of the flow hole.

[0011] By adopting the above technical solution, the temperature of the circuit board is measured and the flow rate is adjusted according to the measured temperature, so that the cooling effect is enhanced when working under high load, overheating is effectively avoided, and energy consumption when high flow cooling is not required is reduced, thereby reducing the overall energy consumption.

[0012] In a preferred example, the present application can be further configured as follows: the adjusting member includes a connecting portion, a deforming portion and an adjusting portion, the deforming portion is annular, the connecting portion is used to connect to the flow hole, and the adjusting portion is used to adjust the deformation amount of the deforming portion.

[0013] By adopting the above technical solution, when the flow rate needs to be adjusted, the deformation part is deformed through the adjustment part, thereby increasing the amount of water that can pass through per unit time, thereby achieving the purpose of adjusting the flow rate.

[0014] In a preferred example, the present application can be further configured as follows: the adjusting part includes a moving part and a control part, the moving part is installed on the deformation part, and the control part is used to control the moving part to approach or move away from the connecting part.

[0015] By adopting the above technical solution, the deformation part is adjusted by controlling the moving part to approach or move away from the connecting part, thereby making the hole formed by the annular deformation part larger or smaller, thereby adjusting the passing flow.

[0016] In a preferred example, the present application can be further configured as follows: the moving part can be attracted by a magnet, and the control part is an electromagnet.

[0017] By adopting the above technical solution, that is, by turning the electromagnet on and off, the purpose of controlling the movement of the moving part is achieved.

[0018] In a preferred example, the present application can be further configured as follows: the flow hole includes a flow section 1 and a flow section 2, the diameter of the flow section 1 is larger than the diameter of the flow section 2, and the regulating member is installed in the flow section 1.

[0019] By adopting the above technical solution, the regulating member is installed in the flow section 1, so that when the deformation part is deformed under the impact of the water flow, the flow section 2 can play a certain supporting effect on the deformation part. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic cross-sectional view of the motor of this application.

[0021] Figure 2 It is a schematic diagram of the adjustment part of this application.

[0022] Figure numerals: 1, motor shaft; 2, flow hole; 21, flow section 1; 22, flow section 2; 3, adjustment member; 31, connecting part; 32, deformation part; 33, moving part; 34, reinforcement ring; 4, installation cavity. DETAILED DESCRIPTION

[0023] The present application is further described in detail below in conjunction with the accompanying drawings.

[0024] Reference Figure 1 and Figure 2 , is an electronic water pump disclosed in the present application, comprising a motor, a pump housing and an impeller, the motor comprising a motor shaft 1, a flow hole 2 being arranged on the motor shaft 1, the flow hole 2 penetrating the motor shaft 1 along the axial direction, an adjusting member 3 being arranged on the motor shaft 1, the adjusting member 3 being used to adjust the flow rate of the flow hole 2. The flow hole 2 comprises a flow section 1 21 and a flow section 2 22, the diameter of the flow section 1 21 is larger than the diameter of the flow section 2 22, and the adjusting member 3 is installed in the flow section 1 21.

[0025] The adjusting member 3 includes a connecting portion 31, a deforming portion 32 and an adjusting portion. The deforming portion 32 is annular. The connecting portion 31 is used to connect to the flow hole 2, and the adjusting portion is used to adjust the deformation of the deforming portion 32. The adjusting portion includes a moving portion 33 and a control portion. The moving portion 33 is installed on the deforming portion 32. The control portion is used to control the moving portion 33 to approach or move away from the connecting portion 31. The moving portion 33 can be attracted by a magnet (such as iron), and the control portion is an electromagnet. The electromagnet is installed on the motor shaft 1 and is powered by a conductive slip ring. When an electromagnet is used, it meets the following function

[0026]

[0027] Among them I max and I min are the minimum and maximum values ​​of the current respectively; I prev Hysteresis term; T0 is the reference temperature, set to the lowest normal operating temperature of the water pump; k is the adjustment factor, which determines the degree of influence of temperature change on current (the larger the value, the faster the response). α is 0.6 to 0.9, which indicates the smoothness of current change with temperature.

[0028] Therefore, it has the following characteristics: at low temperatures, the current of the electromagnet is small, which saves energy. At high temperatures, the current will increase rapidly, improving the heat dissipation capacity of the water pump. It avoids sudden changes caused by linear control and is smoother.

[0029] In another embodiment, the adjustment part can adopt a MEMS (micro-electromechanical system) driver. The deformation part 32 is adjusted by a micro-controllable actuator to change the flow rate, which has lower power consumption and faster response. The power supply for powering the MEMS can be installed on the shaft. The MEMS uses a micro-mechanical structure to complete the deformation control without the need for additional power supply.

[0030] In another embodiment, the adjustment part may be made of thermo-deformable material (shape memory alloy SMA) for temperature adaptive adjustment, and the deformation part 32 may be directly driven to deform by temperature change.

[0031] The deformable portion 32 is made of rubber or silicone. A plurality of reinforcing rings 34 are arranged in an array on the deformable portion 32 . The reinforcing rings 34 can be linear or dot-shaped.

[0032] The motor is provided with an installation cavity 4, which is used to install the circuit board. The flow hole 2 is connected to the installation cavity 4. The installation cavity 4 and the chamber of the motor for installing the rotor are connected through a heat dissipation channel. The circuit board is provided with a heat dissipation block, which can be made of metal and is located in the heat dissipation channel. The heat dissipation block is sealed in the heat dissipation channel.

[0033] The motor is also provided with a control module and a temperature measuring module for measuring the temperature of the circuit board. The temperature measuring module detects the temperature of the circuit board and sends the temperature to the control module. After receiving the temperature, the control module compares it with the standard temperature and controls the current of the electromagnet according to the difference with the standard temperature, thereby controlling the electromagnet adsorption moving part 33 to move a corresponding distance.

[0034] The implementation principle of this embodiment is: by detecting the temperature of the circuit board, the flow rate is adjusted, thereby realizing intelligent control of the coolant flow rate. According to the real-time temperature change of the printed circuit board, the opening of the throttle hole is automatically adjusted, which can enhance the cooling effect during high-load operation and effectively avoid overheating.

[0035] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An electronic water pump, characterized in that: The invention comprises a motor, a pump casing and an impeller, wherein the motor comprises a motor shaft (1), a flow hole (2) is provided on the motor shaft (1), the flow hole (2) penetrates the motor shaft (1) along the axial direction, and an adjusting member (3) is provided on the motor shaft (1), and the adjusting member (3) is used to adjust the flow rate of the flow hole (2).

2. An electronic water pump according to claim 1, characterized in that: The motor is provided with a mounting cavity (4), the mounting cavity (4) being used for mounting a circuit board, and the flow hole (2) and the mounting cavity (4) are connected.

3. An electronic water pump according to claim 2, characterized in that: It also includes a temperature measurement module and a control module. The control module obtains the temperature detected by the temperature measurement module, adjusts the adjustment member (3) according to the temperature, and adjusts the flow rate of the flow hole (2).

4. An electronic water pump according to claim 3, characterized in that: The regulating member (3) comprises a connecting portion (31), a deforming portion (32) and an regulating portion. The deforming portion (32) is annular. The connecting portion (31) is used to be connected to the flow hole (2). The regulating portion is used to adjust the deformation amount of the deforming portion (32).

5. An electronic water pump according to claim 4, characterized in that: The adjusting part comprises a moving part (33) and a control part, wherein the moving part (33) is mounted on the deformation part (32), and the control part is used to control the moving part (33) to approach or move away from the connecting part (31).

6. An electronic water pump according to claim 5, characterized in that: The moving part (33) can be attracted by a magnet, and the control part is an electromagnet.

7. An electronic water pump according to claim 6, characterized in that: The flow hole (2) comprises a flow section 1 (21) and a flow section 2 (22), the diameter of the flow section 1 (21) is larger than the diameter of the flow section 2 (22), and the regulating member (3) is installed in the flow section 1 (21).

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