Electronic expansion valve for vehicle

Abstract

The electronic expansion valve for the vehicle is mainly composed of a drive coil, a valve element assembly and a valve body assembly, the valve element assembly is further composed of a sleeve limiting assembly, a rotor valve needle assembly, a guide screw seat, a valve seat body assembly and a valve port seat, the valve body assembly is composed of a filter assembly and a valve body, and the filter assembly is composed of a filter screen and a fixing frame. The filtering assembly is installed at the inlet of the valve body through the threads, impurities in a system can be effectively blocked outside the valve element assembly of the electronic expansion valve, the opening degree of the electronic expansion valve cannot be affected, and meanwhile the service life of the electronic expansion valve is prolonged. Similarly, large bubbles generated at the inlet of the electronic expansion valve can be divided into small bubbles through the filtering assembly in advance, flowing sound caused by the fact that the large bubbles directly impact the valve port of the electronic expansion valve is avoided, and therefore the comfort degree of a driver and passengers is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic expansion valves, in particular to an electronic expansion valve. Background Art

[0002] The electronic expansion valve is an important component in the refrigeration system, which mainly plays the role of throttling, reducing pressure and regulating flow. The structure of the existing known automotive electronic expansion valve is as follows: Figure 1 As shown, it is mainly composed of a drive coil 1, a valve core assembly 2, and a valve body 3. The valve core assembly 2 is further composed of a sleeve limit assembly 21, a rotor valve needle assembly 22, a guide screw seat 23, a valve seat body assembly 24, and a valve port seat 25. The rotor valve needle assembly 22 is threadedly matched with the guide screw seat 23 to achieve up and down movement, thereby achieving control of the flow rate and closing. Since the system pipeline cannot be absolutely clean, and the valve port of the electronic expansion valve is the middle cut-off point of the entire system, impurities can easily affect the opening of the electronic expansion valve, causing the electronic expansion valve to malfunction and unable to work normally. Furthermore, in the system, the refrigerant at the inlet of the electronic expansion valve is in a high-pressure state. The refrigerant in this state is usually in a gas-liquid mixed form, so many bubbles will be formed. Due to the cut-off effect of the electronic expansion valve, some larger bubbles will hit the valve port of the electronic expansion valve, causing the bubbles to burst, which will cause the system to produce flow noise, thereby reducing the comfort of the driver and passengers. Therefore, a technical solution is needed to solve the above problems. Summary of the Invention

[0003] The purpose of the vehicle electronic expansion valve described in the utility model is to solve the above problems and provide a new vehicle electronic expansion valve structure, which has the advantages of good system adaptability and easy processing and manufacturing.

[0004] The automotive electronic expansion valve of the present invention is mainly composed of a drive coil, a valve core assembly and a valve body assembly, wherein the valve core assembly is composed of a sleeve limit assembly, a rotor valve needle assembly, a guide screw seat, a valve seat body assembly and a valve port seat. It is characterized in that the valve body assembly is composed of a filter assembly and a valve body.

[0005] The utility model also includes the following additional technical features:

[0006] The filter assembly consists of a filter screen and a fixing frame.

[0007] The filter screen and the fixing frame are fixed by laser welding.

[0008] The fixing frame is a circular metal part with an external thread arranged on its outer ring surface.

[0009] An internal thread is provided in the inlet hole of the valve body, and the filter assembly is fixed to the valve body via the thread.

[0010] Compared with the existing technology, the electronic expansion valve for vehicle provided by the present invention has the following beneficial effects:

[0011] 1. The utility model installs the filter assembly at the inlet of the valve body through threads, which can effectively block impurities in the system outside the valve core assembly of the electronic expansion valve, will not affect the opening of the electronic expansion valve, and also improve the service life of the electronic expansion valve.

[0012] 2. The utility model installs the filter assembly at the inlet of the valve body through a thread, which can divide the larger bubbles generated at the inlet of the electronic expansion valve into smaller bubbles through the filter assembly in advance, avoiding the flow sound generated by the larger bubbles directly hitting the valve port of the electronic expansion valve, thereby improving the comfort of the driver and passengers.

[0013] The present invention will be described in further detail below with reference to the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural diagram of a known automotive electronic expansion valve;

[0015] 1-drive coil, 2-valve core assembly, 3-valve body, 21-sleeve limit assembly, 22-rotor valve needle assembly, 23-guide screw seat, 24-valve seat assembly, 25-valve port seat

[0016] Figure 2 This is a structural diagram of the vehicle electronic expansion valve of the present utility model;

[0017] 1-drive coil, 2-valve core assembly, 3-valve body assembly, 21-sleeve limit assembly, 22-rotor valve needle assembly, 23-guide screw seat, 24-valve seat assembly, 25-valve port seat, 31-filter assembly, 32-valve

[0018] body

[0019] Figure 3 This is a structural diagram of the filter assembly of the automotive electronic expansion valve of the present utility model;

[0020] 311-fixed frame, 312-filter, 311a-external thread

[0021] Figure 4 This is a partial enlarged view of the valve body of the vehicle electronic expansion valve of the present utility model;

[0022] 32a-internal thread DETAILED DESCRIPTION

[0023] like Figure 2As shown, the present invention mainly consists of a drive coil 1, a valve core assembly 2 and a valve body assembly 3, wherein the valve core assembly 2 is further composed of a sleeve limit assembly 21, a rotor valve needle assembly 22, a guide screw seat 23, a valve seat assembly 24, and a valve port seat 25, wherein the valve body assembly 3 is further composed of a filter assembly 31 and a valve body 32, wherein the filter assembly 31 is composed of a filter screen 312 and a fixing frame 311. The filter screen 312 and the fixing frame 311 are fixed by laser welding. The fixing frame 311 is a circular metal part with an external thread 311a on its outer ring surface. The inlet hole of the valve body 32 is provided with an internal thread 32a, and the filter assembly 31 and the valve body 32 are fixed by threads.

[0024] The assembly process of the automotive electronic expansion valve is as follows:

[0025] First, thread the valve port assembly 25 into the valve seat assembly 24. Next, thread the rotor needle assembly 22 and the guide screw seat 23 together. Finally, install the sleeve limiter assembly 21 onto the valve seat assembly 24. This completes the assembly of the valve core assembly 2. The filter assembly 31 is threaded into the valve body 32. Finally, the valve core assembly 2 is installed onto the valve body assembly 3. Finally, the drive coil 1 is fitted onto the valve core assembly 2. This completes the assembly of the entire product.

[0026] The working principle of the automotive electronic expansion valve is as follows:

[0027] The refrigerant flows out from the inlet of the electronic expansion valve body 32 through the air-conditioning pipeline through the valve core assembly 2. At this time, the driving coil 1 is energized in the forward or reverse direction, forcing the rotor valve needle assembly 22 to perform a clockwise or counterclockwise spiral motion on the guide screw seat 23. At the same time, the rotor valve needle assembly 22 moves linearly upward or downward, thereby opening or closing the valve port seat 25.

[0028] The above examples are only used to illustrate and not to limit the technical solutions of the present invention. Any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. An electronic expansion valve for a vehicle, mainly composed of a drive coil (1), a valve core assembly (2) and a valve body assembly (3), wherein the valve core assembly (2) is further composed of a sleeve limit assembly (21), a rotor valve needle assembly (22), a guide screw seat (23), a valve seat body assembly (24), and a valve port seat (25), characterized in that: The valve body assembly (3) consists of a filter assembly (31) and a valve body (32).

2. The vehicle electronic expansion valve according to claim 1, characterized in that: The filter assembly (31) consists of a filter screen (312) and a fixing frame (311).

3. The vehicle electronic expansion valve according to claim 2, characterized in that: The filter screen (312) and the fixing frame (311) are fixed by laser welding.

4. The vehicle electronic expansion valve according to claim 2, characterized in that: The fixing frame (311) is a circular metal part, and an external thread (311a) is provided on its outer ring surface.

5. The vehicle electronic expansion valve according to claim 1, characterized in that: An internal thread (32a) is provided in the inlet hole of the valve body (32), and the filter assembly (31) and the valve body (32) are fixed via the thread.

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