Electronic water pump for automobile

Abstract

The utility model relates to the technical field of electronic water pumps, and discloses an electronic water pump for an automobile, which comprises a casing, a motor assembly, a water pump and a water pump, the circuit board is used for driving the water pump; the stator, the rotor and the impeller are arranged in the machine shell, and the rotor can rotate in response to the action of a magnetic field between the stator and the rotor and drives the impeller to rotate so as to pressurize a water body; the rotor and the impeller can rotate in the circumferential direction of the rotating shaft; the water insulation assembly is used for isolating the stator from the rotor and preventing a water body from being in contact with the stator; the waterproof assembly comprises a heat conduction seat body, the circuit board is installed on the side, back on to the rotor, of the heat conduction seat body, and the heat conduction seat body is used for conducting heat, so that heat energy generated when the circuit board works exchanges heat with water on the inner side of the waterproof assembly. According to the utility model, on the basis of air heat dissipation, the circulating water body is used for heat dissipation, so that the heat dissipation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic water pumps, in particular to an electronic water pump for automobiles. Background Art

[0002] New energy vehicles, RVs and other special vehicles often use micro water pumps as water circulation, cooling or on-board water supply systems. This type of micro self-priming water pump is collectively referred to as an automotive electronic water pump.

[0003] The current automotive electronic water pump technology, such as Figure 1 , generally composed of the following components: a casing as a working space, in which a circuit board, a motor assembly and a turbine are integrated, the circuit board is used to drive the motor assembly, the motor assembly is used to provide power to the turbine, and the water body is pressurized by the action of the turbine. The motor assembly specifically includes a stator, a rotor, and a rotating shaft, wherein the rotor rotates in response to the magnetic field between the stator and the rotor, and the rotor drives the turbine to rotate to realize the operation of the turbine (in the figure, the rotor and the turbine are an integrated structure), wherein the rotating shaft is used to guide the movement of the rotor.

[0004] At the same time, in order to prevent the circuit board from overheating, the existing electronic water pump usually uses a material with good thermal conductivity as the back cover of the electronic water pump, and installs the circuit board on the back cover in a close fit, using the thermal conductivity of the back cover to conduct heat and then dissipate the heat into the air.

[0005] This heat dissipation structure has defects: the heat dissipation position is limited and the heat dissipation effect has certain limitations. Utility Model Content

[0006] like Figure 1 In traditional electronic water pumps, in order to prevent water from entering the stator coil and circuit board, the solution usually adopted is to use a plastic waterproof sleeve to isolate the inside of the casing into two spaces that allow water to enter and prevent water from entering, and place the stator and circuit board in the space that water cannot enter; because the waterproof sleeve is made of plastic material, it has poor thermal conductivity and cannot help the heat dissipation of the motor. In addition, there is no physical contact between the waterproof sleeve and the circuit board, and the water circulating in the water pump does not help cool the circuit board.

[0007] In order to improve the heat dissipation efficiency, this solution proposes to use circulating water for heat dissipation on the basis of air heat dissipation, so as to speed up the removal of heat energy from the heat conduction material, thereby improving the heat dissipation effect.

[0008] Based on this, the utility model provides an electronic water pump for a car to achieve the above-mentioned effect.

[0009] Specifically, the electronic water pump includes a casing, which is the outer shell of the motor assembly; it also includes a circuit board, which is used to drive the water pump; it also includes a stator, a rotor and an impeller arranged in the casing, and the rotor can rotate in response to the magnetic field between the stator and the rotor, and drive the impeller to rotate to increase the pressure of the water body; it also includes a rotating shaft, so that the rotor and the impeller can rotate along the circumference of the rotating shaft; it also includes a water-isolating assembly, which is used to isolate the stator and the rotor to prevent the water body from contacting the stator.

[0010] The difference from the traditional electronic water pump is that the water-isolating component in the traditional solution only has the function of isolating water and is generally made of plastic, while the water-isolating component in this solution includes a heat-conducting seat, which is made of metal. The circuit board is installed on the side of the heat-conducting seat facing away from the rotor. The heat-conducting seat is used to conduct heat so that the heat energy generated by the circuit board during operation can be exchanged with the water inside the water-isolating component. That is, the good thermal conductivity of metal parts is utilized to make the water circulating to the heat-conducting seat exchange heat with the circuit board through the thermal conductivity of the heat-conducting seat to dissipate heat for the circuit board, thereby improving the heat dissipation efficiency and also playing the role of dissipating heat for the motor as a whole.

[0011] Preferably, the electronic water pump further comprises a thermally conductive gasket, which is installed between the thermally conductive seat and the circuit board, and is glued between the thermally conductive gasket and the circuit board so that the thermally conductive gasket and the circuit board form a fixed connection to improve the efficiency of heat conduction.

[0012] Preferably, the electronic water pump further comprises an end cover, which is connected to the housing, and the circuit board is accommodated in the first space formed by the heat-conducting seat and the end cover to protect the circuit board;

[0013] The difference between the end cover in this solution and the traditional solution is that in the traditional solution, metal parts are used as end covers, the circuit board is attached to the end cover, and the thermal conductivity of the metal end cover is used to transfer heat energy to the air outside the water pump for heat dissipation, while the end cover in this solution can use plastic parts, thereby improving heat dissipation efficiency while reducing costs.

[0014] Preferably, the water-proof assembly also includes an annular wall member, which is made of a plastic member and has one end that forms a sealed connection with the heat-conducting seat body, so that the stator is located on the outside of the annular wall member and the rotor is located on the inside of the annular wall member. Specifically, the two are connected by a tight fit and are sealed by a rubber ring.

[0015] Preferably, a flange is formed at one end of the annular wall member away from the heat-conducting seat body, and the flange extends to connect with the casing, so that the stator is accommodated in a second space formed by the annular wall member, the heat-conducting seat body and the casing.

[0016] Preferably, the electronic water pump also includes a water pump housing, which is connected to the casing so that the rotor is accommodated in a third space formed by the heat-conducting seat body, the annular wall member, and the water pump housing. Specifically, the flange is placed between the casing and the water pump housing, and the three are connected by screws.

[0017] Preferably, the rotating shaft is coaxial with the rotor, and a slot is formed on the heat-conducting seat body for the end of the rotating shaft to extend into and be fixedly connected. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 It is a cross-sectional view of a conventional electronic water pump in the utility model;

[0020] Figure 2 is a cross-sectional view of an automotive electronic water pump in an embodiment of the utility model;

[0021] In the figure: casing 1; circuit board 2; stator 3; rotor 4; rotating shaft 5; impeller 6; water-proof assembly 7; heat-conducting seat body 8; heat-conducting gasket 9; end cover 10; annular wall member 11; flange 12; water pump casing 13; first space a; second space b; third space c. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Embodiment: This embodiment provides a best implementation scheme of an electronic water pump for automobiles.

[0024] Specifically, Figure 2 The electronic water pump includes a housing 1, which is the outer shell of the motor assembly; it also includes a circuit board 2, which is used to drive the water pump; it also includes a stator 3, a rotor 4 and an impeller 6 arranged in the housing 1, the rotor 4 can rotate in response to the magnetic field between the stator 3 and the rotor 4, and drive the impeller 6 to rotate (in this solution, the rotating shaft 5 and the impeller 6 are an integrated structure) to increase the pressure of the water body; it also includes a rotating shaft 5, so that the rotor 4 and the impeller 6 can rotate along the circumference of the rotating shaft 5; it also includes a water-isolating component 7, which is used to isolate the stator 3 and the rotor 4 to prevent the water body from contacting the stator 3.

[0025] The difference from traditional electronic water pumps is: Figure 2 The water-proof component 7 in the traditional solution only has the function of water-proofing and is generally made of plastic. The water-proof component 7 in this solution includes a heat-conducting seat 8, which is made of metal. The circuit board 2 is installed on the side of the heat-conducting seat 8 facing away from the rotor 4. The heat-conducting seat 8 is used to conduct heat, so that the heat energy generated by the circuit board during operation can be exchanged with the water inside the water-proof component 7.

[0026] Further, such as Figure 2 The electronic water pump also includes a thermally conductive gasket 9, which is installed between the thermally conductive seat 8 and the circuit board 2, and is glued between the thermally conductive gasket 9 and the circuit board 2, so that the thermally conductive gasket 9 and the circuit board 2 form a fixed connection to improve the efficiency of heat conduction.

[0027] Further, such as Figure 2 The electronic water pump also includes an end cover 10, which is connected to the casing 1, and accommodates the circuit board 2 in the first space a formed by the heat-conducting seat 8 and the end cover 10 to protect the circuit board 2. The end cover 10 in this solution can use a plastic part, thereby improving the heat dissipation efficiency and reducing the cost.

[0028] Further, such as Figure 2 The water-proof component 7 also includes an annular wall member 11, which is made of a plastic member, and one end of which forms a sealing connection with the heat-conducting seat body 8, so that the stator 3 is located on the outside of the annular wall member 11, and the rotor 4 is located on the inside of the annular wall member 11. Specifically, the two are connected by a tight fit and are sealed by a rubber ring.

[0029] Further, such as Figure 2 A flange 12 is formed at one end of the annular wall member 11 away from the heat-conducting seat body 8, and the flange 12 extends to connect with the housing 1, so that the stator 3 is accommodated in a second space b formed by the annular wall member 11, the heat-conducting seat body 8 and the housing 1.

[0030] Further, such as Figure 2 The electronic water pump also includes a water pump housing 13, which is connected to the casing 1, so that the rotor 4 is accommodated in a third space c formed by the heat-conducting seat body 8, the annular wall member 11, and the water pump housing 13. Specifically, the flange 12 is placed between the casing 1 and the water pump housing 13, and the three are connected by screws.

[0031] Further, such as Figure 2 The rotating shaft 5 is coaxial with the rotor 4, and a groove is formed on the heat conducting seat 8 for the end of the rotating shaft 5 to extend into and be fixedly connected.

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An electronic water pump for a car, comprising: chassis; and a circuit board, wherein the circuit board is used to drive a water pump; and a stator, a rotor and an impeller disposed in the housing, wherein the rotor can rotate in response to the magnetic field between the stator and the rotor, and drive the impeller to rotate to increase the pressure of the water body; and a rotating shaft, so that the rotor and the impeller can rotate along the circumference of the rotating shaft; and a water-isolating assembly, the water-isolating assembly is used to isolate the stator from the rotor to prevent water from contacting the stator; Features: The water-proof assembly includes a heat-conducting seat, and the circuit board is installed on the side of the heat-conducting seat facing away from the rotor. The heat-conducting seat is used to conduct heat so that the heat energy generated by the circuit board during operation can be exchanged with the water inside the water-proof assembly.

2. An electronic water pump for a car according to claim 1, characterized in that: A thermally conductive pad is also included, and the thermally conductive pad is installed between the thermally conductive seat and the circuit board.

3. An electronic water pump for a vehicle according to claim 1 or 2, characterized in that: An end cover is also included, and the end cover is connected to the housing to accommodate the circuit board in a first space formed by the heat-conducting seat and the end cover.

4. An electronic water pump for a vehicle according to claim 1 or 2, characterized in that: The water-blocking assembly further includes an annular wall member, one end of which is sealedly connected to the heat-conducting seat body, so that the stator is located outside the annular wall member and the rotor is located inside the annular wall member.

5. The electronic water pump for automobile according to claim 4, characterized in that: A flange is formed at one end of the annular wall away from the heat-conducting seat body, and the flange extends to connect with the housing, so that the stator is accommodated in a second space formed by the annular wall member, the heat-conducting seat body and the housing.

6. The electronic water pump for automobile according to claim 4, characterized in that: It also includes a water pump housing, which is connected to the casing so that the rotor is accommodated in a third space formed by the heat-conducting seat body, the annular wall member and the water pump housing.

7. An electronic water pump for a vehicle according to claim 1 or 2, characterized in that: The rotating shaft is coaxial with the rotor, and a slot is formed on the heat-conducting seat body for the end of the rotating shaft to extend into and be fixedly connected.

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