Automobile electric drive circuit degassing device

Abstract

This utility model relates to the field of automotive repair equipment, specifically disclosing a degassing device for an automotive electric drive circuit. The device includes an expansion tank, an electric water pump, a vent valve, an electric drive unit, a circuit water pipe, and a connecting pipe. The expansion tank, electric water pump, vent valve, and electric drive unit are connected in series via the circuit water pipe to form a closed electric drive circuit. The connecting pipe is connected in parallel between the expansion tank and the vent valve. This automotive electric drive circuit degassing device simplifies the degassing operation of hybrid vehicle electric drive circuits, making the operation simpler and more convenient.

Description

Technical Field

[0001] This utility model relates to the field of automotive repair equipment, specifically a degassing device for an automotive electric drive circuit. Background Technology

[0002] As the cooling systems of hybrid vehicles become more functional, their complexity also increases. Due to layout considerations, electric drive components are often located at the rear of the vehicle, requiring the cooling piping for the electric drive circuit to run from the front compartment to the rear, further complicating the cooling system piping. While vacuuming the entire vehicle before refilling is not problematic, without vacuum equipment, residual air remains after refilling. This necessitates using a diagnostic tool to forcefully degas the electric drive water pump. The presence of air in the system easily triggers the anti-dry-run protection mechanism of the water pump. After multiple triggers, the electric drive water pump will shut down for protection, requiring the vehicle to be powered off and then on again for repeated operation. This method is cumbersome, time-consuming, and provides a poor user experience. Therefore, during maintenance and refilling, it is crucial to ensure complete degassing of the coolant to allow for stable coolant flow and cooling of the relevant electric drive components. Utility Model Content

[0003] The purpose of this invention is to provide a degassing device for automotive electric drive circuits, which simplifies the degassing operation of hybrid vehicle electric drive circuits, making the operation simpler and more convenient.

[0004] The objective of this utility model can be achieved through the following technical solutions:

[0005] An automotive electric drive circuit degassing device includes an expansion tank, an electric drive water pump, a vent valve, an electric drive unit, a circuit water pipe, and a connecting pipe. The expansion tank, electric drive water pump, vent valve, and electric drive unit are connected in series to form a closed electric drive circuit. The connecting pipe is connected in parallel between the expansion tank and the vent valve.

[0006] In a further embodiment, an auxiliary electronic water pump is connected in series on the connecting pipe.

[0007] In a further embodiment, the connecting pipe has at least two sections: one section is used to connect the auxiliary electronic water pump and the expansion tank in series, and the other section is used to connect the auxiliary electronic water pump and the venting valve in series.

[0008] A further embodiment also includes a power supply, which is electrically connected to an auxiliary electronic water pump and is used to supply power to the auxiliary electronic water pump.

[0009] In a further embodiment, the expansion tank has a pressure cover, which is removable.

[0010] In a further embodiment, the loop water pipe has at least four sections, which are respectively connected between the expansion tank and the electric pump, between the electric pump and the vent valve, between the vent valve and the electric drive device, and between the electric drive device and the expansion tank.

[0011] In a further embodiment, the connecting pipe is a flexible hose.

[0012] In a further proposed solution, the return water pipe can be an EPDM rubber pipe, a nylon pipe, or a metal pipe.

[0013] In a further embodiment, the degassing device for the automotive electric drive circuit also includes a high-pressure air gun, which is inserted into the expansion tank through a pressure cap.

[0014] In a further embodiment, the aforementioned expansion tank is filled with coolant.

[0015] The beneficial effects of this utility model are:

[0016] The venting valve of this invention is installed between the electric water pump and the electric drive device. It is connected to the electric water pump and the electric drive device through a return water pipe and connected in series with the expansion tank through a connecting pipe. This can accelerate the venting at the front end of the electric water pump, reduce the venting time, and reduce the number of times it runs dry and restarts.

[0017] This invention uses an auxiliary electronic water pump to accelerate the exhaust of the cooling system. It is readily available and cost-effective in the absence of vacuum equipment. It also prevents the electric water pump from running dry and failing to operate. No restart is required, and no diagnostic equipment is needed, reducing dependence on equipment. It is simple to operate and greatly expands the application scenarios. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of a degassing device for an automotive electric drive circuit according to an embodiment of this utility model;

[0020] Figure 2 This is a schematic diagram of another automotive electric drive circuit degassing device in this embodiment of the present invention;

[0021] In the diagram: 1. Expansion tank; 2. Pressure cover; 3. Electric water pump; 4. Electric drive device; 5. Air release valve; 6. Return water pipe; 7. Connecting pipe; 8. Auxiliary electric water pump. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1, as Figure 1 As shown, an automotive electric drive circuit degassing device includes an expansion tank 1, an electric drive water pump 3, a vent valve 5, an electric drive unit 4, a circuit water pipe 6, and a connecting pipe 7. The expansion tank 1, electric drive water pump 3, vent valve 5, and electric drive unit 4 are connected in series via the circuit water pipe 6 to form a closed electric drive circuit. The connecting pipe 7 is connected in parallel between the expansion tank 1 and the vent valve 5. The connecting pipe 7 is a flexible hose. The expansion tank 1 has a pressure cap 2, which is removable to facilitate the insertion of the connecting pipe 7. The circuit water pipe 6 has at least four sections, respectively connecting the expansion tank 1 and the electric drive water pump 3, the electric drive water pump 3 and the vent valve 5, the vent valve 5 and the electric drive unit 4, and the electric drive unit 4 and the expansion tank 1.

[0024] The specific steps are as follows:

[0025] 1. Open the pressure cap 2 and vent valve 5 of the expansion tank 1 and connect them in series with a hose. After connection, the pipeline needs to be smooth and in a low position.

[0026] 2. After the diagnostic instrument starts degassing, when the electric water pump 3 is working, pressurize from the pressure cover 2 of the expansion tank 1 with a high-pressure air gun to speed up the degassing process.

[0027] 3. If the electric water pump 3 stops working, power off the entire vehicle; repeat the above operation after powering on.

[0028] 4. Once the coolant in the hose flows normally, no large air bubbles are generated, and the coolant flow rate does not change significantly, the degassing is complete.

[0029] Advantages of this degassing method and device: 1) It speeds up the degassing process and is more operable; 2) It requires less equipment and can be operated with a diagnostic tool or at a service point. Disadvantages: 1) The electric water pump 3 will not work continuously due to the anti-dry-run protection, requiring the vehicle to be powered on and off repeatedly; 2) Because it is necessary to determine whether the electric water pump 3 is working, at least two people are required to complete the operation; 3) During the second step, if the pressure cap 2 of the expansion tank 1 cannot be sealed when the high-pressure air gun is pressurized, and the hose and pressure cap 2 can be directly connected, and the hose can be connected through a hose connector or heat-sealed, a clean container needs to be added. The hose is connected to this container, and by pressurizing this container, the pressure of the expansion tank 1 at the other end of the hose increases. When there is no coolant in the expansion tank 1, coolant should be added in time to ensure that there is coolant in the expansion tank 1. This degassing method and device requires a diagnostic tool to operate; without a diagnostic tool, it cannot be performed.

[0030] Example 2, as Figure 2 As shown, based on Embodiment 1, an auxiliary electric water pump 8 is connected in series on the connecting pipe 7. The connecting pipe 7 has at least two sections: one section is used to connect the auxiliary electric water pump 8 and the expansion tank 1 in series, and the other section is used to connect the auxiliary electric water pump 8 and the vent valve 5 in series. A power supply is also included, which is electrically connected to the auxiliary electric water pump 8 and is used to supply power to the auxiliary electric water pump 8.

[0031] The specific steps are as follows:

[0032] Add coolant from the other end of the hose to ensure that the hose between the auxiliary electric water pump 8 and the expansion tank 1 is filled with coolant.

[0033] The auxiliary electronic water pump 8 is connected to an external power source to ensure its normal operation. The moment the auxiliary electronic water pump 8 starts working, the hose is instantly inserted into the pressure cap 2 of the expansion tank 1. The system will automatically degas, eliminating the need for any further work such as powering the entire vehicle on or off.

[0034] The advantages of this degassing method and device are: 1) Two people are required to operate the hose when adding coolant, but only one person is needed for other processes, making it simple and convenient to operate; 2) No diagnostic instrument is required, reducing dependence on equipment, greatly increasing the application scenarios, and providing a better user experience for the end user; 3) No need to power up the whole vehicle, and no need for manual judgment of whether the electric water pump 3 is working, resulting in high efficiency.

[0035] Figure 2 The degassing method and device shown have been verified to be effective for degassing hybrid electric drive systems. Generally, only an auxiliary electric water pump 8 and a jump-start power supply are required; the remaining equipment is typically included with the hybrid vehicle, or can be disassembled and connected separately if not. This degassing method is simple, the equipment is readily available, and the degassing device is easy to set up, allowing for rapid deployment and providing a better user experience.

[0036] In some embodiments, the return water pipe 6 is an EPDM rubber pipe, a nylon pipe, or a metal pipe such as a copper pipe. Copper pipes have a long service life and are easy to connect.

[0037] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A degassing device for an electric drive circuit of an automobile, characterized by It includes an expansion tank (1), an electric water pump (3), an air release valve (5), an electric drive device (4), a loop water pipe (6), and a connecting pipe (7). The expansion tank (1), the electric water pump (3), the air release valve (5), and the electric drive device (4) are connected in series through the loop water pipe (6) to form a closed electric drive loop. The connecting pipe (7) is connected in parallel between the expansion tank (1) and the air release valve (5).

2. The gas removal device for an electric drive circuit of an automobile according to claim 1, characterized by, An auxiliary electronic water pump (8) is connected in series on the connecting pipe (7).

3. The gas removal device for an electric drive circuit of an automobile according to claim 2, characterized by The connecting pipe (7) has at least two sections, one section for connecting the auxiliary electronic water pump (8) and the expansion tank (1) in series, and the other section for connecting the auxiliary electronic water pump (8) and the vent valve (5) in series.

4. The degassing device for an automotive electric drive circuit according to claim 2, characterized in that, It also includes a power supply, which is electrically connected to the auxiliary electronic water pump (8) and is used to supply power to the auxiliary electronic water pump (8).

5. The degassing device for an automotive electric drive circuit according to claim 1, characterized in that, The expansion tank (1) has a pressure cover (2), which is detachable.

6. The degassing device for an automotive electric drive circuit according to claim 1, characterized in that, The loop water pipe (6) consists of at least four sections, which are respectively connected between the expansion tank (1) and the electric water pump (3), between the electric water pump (3) and the vent valve (5), between the vent valve (5) and the electric drive device (4), and between the electric drive device (4) and the expansion tank (1).

7. The degassing device for an automotive electric drive circuit according to claim 1, characterized in that, The connecting pipe (7) is a flexible hose.

8. The degassing device for an automotive electric drive circuit according to claim 1, characterized in that, The return water pipe (6) is an EPDM rubber pipe, nylon pipe or metal pipe.

9. The degassing device for an automotive electric drive circuit according to claim 1, characterized in that, It also includes a high-pressure air gun, which is inserted into the expansion tank (1) through the pressure cap (2).

10. A degassing device for an automotive electric drive circuit according to claim 1, characterized in that, The expansion tank (1) is filled with coolant.

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