Anti-condensation motor

Abstract

The application provides an anti-condensation motor, which comprises a motor body (10) and a terminal box (20), the terminal box (20) is fixedly installed on the motor body (10), wherein the motor body (10) is provided with a motor working cavity (12), the terminal box (20) is provided with a terminal box cavity (22), and a separation component is further arranged between the terminal box (20) and the motor body (10), and the separation component seals and separates the motor working cavity (12) and the terminal box cavity (22). According to the application, the motor working cavity and the terminal box cavity are sealed and separated, and heat insulation is achieved, and a gas permeation valve is installed respectively, so that the anti-condensation motor has the advantages of simple structure, good sealing performance, effective solution to the condensation problem of the motor terminal box and the wire harness connector, and improved use reliability of the motor in various environments.

Description

Technical Field

[0001] This invention relates to an anti-condensation motor, and more particularly to an anti-condensation motor for new energy vehicles. Background Technology

[0002] The new energy vehicle industry has experienced rapid development due to its economic and environmental benefits. As the power source for new energy vehicles, the reliability of the electric motor directly affects driving safety. The insulation performance of the electric motor is a crucial indicator of its reliability. If the insulation value of the electric motor falls below the specified value, phenomena such as system power interruption or motor burnout may occur.

[0003] Under conditions of high humidity and low temperature in the external environment, condensation is prone to occur after the motor starts operating. This leads to a decrease in the motor's insulation performance and corrosion of internal parts, severely affecting the motor's performance and potentially causing it to burn out. Condensation points inside the motor often occur on the inner wall of the junction box housing and inside the wiring harness connectors. The reason for this is that the interior of a water-cooled motor can be divided into the winding working cavity and the junction box cavity, which are usually completely connected. When the motor is operating, the windings generate a large amount of heat, which, through heat transfer, raises the temperature inside both the winding cavity and the junction box cavity. When the motor stops operating, the low external temperature causes the motor housing to cool down, while the junction box housing cools down quickly. The inner wall of the winding cavity (the motor frame) cools down more slowly, and the air temperature inside the motor also cools down relatively slowly. This creates a significant temperature difference between the air inside the motor and the junction box housing. Once the dew point is reached, the moisture in the air inside the motor preferentially condenses on the cold inner wall of the junction box housing or at the poorly sealed wiring harness connectors, resulting in motor condensation.

[0004] Existing anti-condensation measures include: 1. Spraying "three-proof" paint inside the junction box can improve the insulation performance of the motor, but it cannot reduce the condensation rate and does not fundamentally solve the condensation problem; 2. Adding a desiccant inside the junction box (for example, see patent document CN208820595U) can solve the condensation problem in the short term, but it needs to be replaced regularly and has poor maintainability; 3. Adding a dehumidification device requires a large installation space, is costly, and the humidity and temperature sensors inside the device are not very reliable; 4. Adding a heat insulation layer to the junction box cover (for example, see patent documents CN207098833U and CN207353971U) can reduce the occurrence of condensation on the inner wall of the cover, but it cannot effectively solve the condensation phenomenon around the junction box and at the wire harness connector. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the defects in the prior art and provide an anti-condensation motor.

[0006] To solve the above-mentioned technical problems, the technical solution proposed by this invention is as follows:

[0007] An anti-condensation motor includes a motor body (10) and a junction box (20). The junction box (20) is fixedly installed on the motor body (10). The motor body (10) has a motor working cavity (12), and the junction box (20) has a junction box cavity (22). An isolation component is also provided between the junction box (20) and the motor body (10), and the isolation component seals and isolates the motor working cavity (12) and the junction box cavity (22).

[0008] Furthermore, the isolation component includes a terminal assembly (30) and a terminal fixing plate (40). The terminal assembly (30) is installed between the junction box (20) and the motor body (10) through the terminal fixing plate (40). The terminal assembly (30) is used to transmit electrical energy.

[0009] Furthermore, the upper and / or lower surfaces of the terminal fixing plate (40) are provided with heat-insulating material.

[0010] Furthermore, the junction box (20) includes a junction box cover (21), and the lower surface of the junction box cover (21) is provided with heat insulation material.

[0011] Furthermore, at least one first air exchange component is disposed on the junction box (20); at least one second air exchange component is disposed on the motor body (10).

[0012] Furthermore, the at least one first air exchange component is disposed on the junction box cover (21) and / or the junction box body (24); the at least one second air exchange component is disposed on the base (11) and / or the end cover (14).

[0013] Furthermore, the terminal assembly (30) connects the three-phase output of the motor winding, and includes a metal terminal (31), a first retaining ring (32), an insulating fixing plate (33), and a fastening component (35); the insulating fixing plate (33) is sleeved on the metal terminal (31), and its upper part is limited by the first retaining ring (32); specifically, the terminal fixing plate (40) is sleeved on the insulating fixing plate (33), and its upper surface is limited by the second retaining ring (50). The terminal fixing plate (40) and the insulating fixing plate (33) are together embedded in the motor working cavity (12).

[0014] Furthermore, the terminal assembly (30) also includes a sealing component, which is disposed between the insulating fixing plate (33) and the metal terminal (31); a sealing component is disposed between the terminal fixing plate (40) and the insulating fixing plate (33).

[0015] Compared with the prior art, the advantages of the present invention are as follows: The present invention seals and isolates the motor working cavity and the junction box cavity, and sets up heat insulation, while installing vent valves respectively. The structure is simple, the sealing performance is good, and it effectively solves the problem of condensation in the motor junction box and wire harness connector, thereby improving the reliability of the motor in various environments. Attached Figure Description

[0016] The invention will now be described in more detail with reference to embodiments and the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the anti-condensation motor of the present invention.

[0018] Figure 2 yes Figure 1 A magnified view of point A.

[0019] Figure 3 This is a schematic diagram of the terminal assembly of the present invention.

[0020] The labels in the diagram represent:

[0021] 10. Motor body; 11. Base; 12. Motor working chamber; 121. First motor working chamber; 122. Second motor working chamber; 13. First vent valve; 14. End cover; 20. Junction box; 21. Junction box cover; 22. Junction box cavity; 23. Second vent valve; 24. Junction box body; 30. Terminal assembly; 31. Metal terminal; 32. First retaining ring; 33. Insulating fixing plate; 34. Sealing component; 35. Fastening component; 40. Terminal fixing plate; 50. Second retaining ring. Detailed Implementation

[0022] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0023] In this document, related terms such as "first" and "second" may be used merely to distinguish one entity or action from another, without necessarily requiring or implying any actual such relationship or order between such entities or actions. The term "comprising" or any other variations thereof is intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element obtained by "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element, without further limitation.

[0024] On the other hand, the terminology used in this specification is for illustrative purposes and is not intended to limit the invention. In this specification, the singular includes the plural unless otherwise specified in the sentence. Embodiments of the invention will now be described in detail with reference to the accompanying drawings.

[0025] See appendix Figure 1-2 As shown, the anti-condensation motor of the present invention includes a motor body 10 and a junction box 20. The junction box 20 is fixedly installed on the motor body 10. An isolation component is also provided between the junction box 20 and the motor body 10. The isolation component includes a terminal assembly 30 and a terminal fixing plate 40. The terminal assembly 30 is installed between the junction box 20 and the motor body 10 through the terminal fixing plate 40. The terminal assembly 30 is used to transmit electrical energy.

[0026] The motor body 10 includes a base 11, a motor working cavity 12, and an end cover 14. The space enclosed by the base 11 and the end cover 14 forms the motor working cavity 12, which includes a first motor working cavity 121 and a second motor working cavity 122. Specifically, the first motor working cavity 121 forms the space where the motor windings work; the second motor working cavity 122 forms the space where the end cover 14 connects to the junction box 20.

[0027] Junction box 20 includes junction box cover 21, junction box cavity 22 and junction box body 24. The space enclosed by junction box cover 21 and junction box body 24 forms junction box cavity 22.

[0028] At least one first vent valve 13 (also called a breather plug) is installed on the junction box 20 for air exchange and to balance the internal and external temperature and pressure differences; at least one second vent valve 23 (also called a breather plug) is installed on the motor body 10 for air exchange and to balance the internal and external temperature and pressure differences. The locations of the first vent valve 13 and the second vent valve 23 are not limited to those shown in the attached diagram. Figure 1-2 The given embodiment can also be set in other locations. For example, at least one first vent valve 13 can be set on the junction box cover 21, or on the junction box body 24, or on both the junction box cover 21 and the junction box body 24 respectively; at least one second vent valve 23 can be set on the base 11, or on the end cover 14, or on both the base 11 and the end cover 14 respectively.

[0029] See appendix Figure 3The diagram shows a schematic of the terminal assembly 30. The terminal assembly 30 connects to the three-phase outputs of the motor windings and includes a metal terminal 31, a first retaining ring 32, an insulating fixing plate 33, and a sealing component 34. The insulating fixing plate 33 is fitted onto the metal terminal 31, with its upper part limited by the first retaining ring 32. A sealing component 34 is provided between the insulating fixing plate 33 and the metal terminal 31. Specifically, a terminal fixing plate 40 is fitted onto the insulating fixing plate 33, with its upper surface limited by a second retaining ring 50. A sealing component 34 is provided between the terminal fixing plate 40 and the insulating fixing plate 33. The terminal fixing plate 40 and the insulating fixing plate 33 are together embedded in the second motor working cavity 122. The terminal fixing plate 40 is fixed to the end cover 14, for example, by bolts or screws (not shown in the figure). The metal terminal 31 is fixed to the terminals of the three-phase outputs of the motor windings via a fastening component 35 to transmit electrical energy.

[0030] Preferably, the upper and lower surfaces of the terminal fixing plate 40 are provided with heat insulation material; the lower surface of the junction box cover 21 is also provided with heat insulation material.

[0031] The insulating fixing plate 33 is preferably made of nylon.

[0032] The sealing component 34 is preferably a sealing ring.

[0033] The fastening component 35 is preferably a screw.

[0034] The working principle is explained below. A terminal assembly 30 and a terminal fixing plate 40 are provided between the junction box 20 and the motor body 10. The terminal assembly 30 is installed between the junction box 20 and the motor body 10 through the terminal fixing plate 40, thus sealing and isolating the motor working chamber 12 and the junction box chamber 22. Furthermore, the upper and lower inner surfaces of the terminal fixing plate 40 are provided with heat insulation layers. Both the motor body 10 and the junction box 20 are equipped with vent valves, ensuring stable relative humidity and pressure within the two chambers. Therefore, the heat generated by the motor windings during operation is not significantly transferred to the junction box chamber 22. This prevents a large temperature difference between the air inside the junction box chamber 22 and the junction box housing. Simultaneously, the vent valves maintain the relative humidity and pressure between the motor working chamber 12 and the junction box chamber 22, effectively preventing condensation on the motor.

[0035] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and descriptive purposes. It is not intended to be exhaustive, nor to limit the invention to the precise forms disclosed; obviously, many changes and variations are possible in light of the foregoing teachings. The exemplary embodiments were chosen and described to explain the specific principles of the invention and its practical application, thereby enabling others skilled in the art to implement and utilize various exemplary embodiments of the invention, as well as their different alternatives and modifications. The scope of the invention is intended to be defined by the appended claims and their equivalents.

Claims

1. A condensation-proof electric machine comprising an electric machine body (10) and a terminal box (20) fixedly mounted on the electric machine body (10), wherein, The motor body (10) has a motor working cavity (12), and the junction box (20) has a junction box cavity (22). The characteristic is that an isolation component is also provided between the junction box (20) and the motor body (10), and the isolation component seals and isolates the motor working cavity (12) and the junction box cavity (22). The isolation component includes a terminal assembly (30) and a terminal fixing plate (40). The terminal assembly (30) is installed between the junction box (20) and the motor body (10) through the terminal fixing plate (40). The terminal assembly (30) is used to transmit electrical energy. Its features are: The upper and / or lower surfaces of the terminal fixing plate (40) are provided with heat insulation material; The terminal assembly (30) connects the three-phase output of the motor winding and includes a metal terminal (31), a first retaining ring (32), and an insulating fixing plate (33). The insulating fixing plate (33) is sleeved on the metal terminal (31), and its upper part is limited by the first retaining ring (32); The terminal fixing plate (40) is sleeved on the insulating fixing plate (33), and its upper surface is limited by the second retaining ring (50). The terminal fixing plate (40) and the insulating fixing plate (33) are together embedded in the motor working cavity (12). The terminal assembly (30) further includes a sealing component, which is disposed between the insulating fixing plate (33) and the metal terminal (31); a sealing component is disposed between the terminal fixing plate (40) and the insulating fixing plate (33).

2. An anti-condensation motor according to claim 1, characterized in that The junction box (20) includes a junction box cover (21), and the lower surface of the junction box cover (21) is provided with heat insulation material.

3. An anti-condensation motor according to any one of claims 1 to 2, characterized in that, At least one first air exchange component is disposed on the junction box (20); at least one second air exchange component is disposed on the motor body (10).

4. An anti-condensation motor according to claim 3, characterized in that The at least one first air exchange component is disposed on the junction box cover (21) and / or the junction box body (24); the at least one second air exchange component is disposed on the base (11) and / or the end cover (14).

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