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, and the valve element assembly is composed of a sleeve limiting assembly, a rotor valve needle assembly, a guide screw seat, a valve seat body assembly and a valve port assembly. The valve port assembly is produced in a metal piece in an injection molding mode, and compared with the mode that all the valve port assemblies are produced in a machining mode, the valve port assembly has the advantages of being high in production efficiency, saving materials and reducing cost. And the surface roughness of the valve port surface of the valve port assembly formed through injection molding is better, so that the leakage rate of the valve port of the product is reduced, and the product performance is improved.

Description

Technical Field

[0001] The utility model relates to a vehicle electronic expansion valve, belongs to the technical field of expansion valves, and is suitable for automobile thermal management systems. Background Art

[0002] Automotive electronic expansion valves are key components in automotive thermal management systems. The automotive electronic expansion valve industry is maturing, with numerous manufacturers and fierce competition. Improving product quality and reducing production costs are crucial for every manufacturer.

[0003] 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 controlling the opening and closing of the valve port. In order to make the electronic expansion valve have a smaller valve port leakage after the valve port is closed, the surface roughness of the sealing surface of the valve port seat 25 is required to be small, otherwise the valve port leakage will be large, resulting in poor product performance. In the prior art, the valve port seat 25 is entirely produced by mechanical processing. Due to the limitation of the processing method, the surface roughness of the part cannot be processed very well, resulting in large valve port leakage and poor product performance during actual use. Summary of the Invention

[0004] 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 valve port component structure, which has the advantages of high production efficiency, low cost and good product performance.

[0005] The automotive electronic expansion valve of the present invention is mainly composed of a drive coil, a valve core assembly and a valve body, 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 assembly. It is characterized in that the valve port assembly is composed of a sealing plastic part and a valve port metal part.

[0006] The utility model also includes the following additional technical features:

[0007] The sealing plastic part and the valve port metal part are connected into one piece through injection molding.

[0008] The sealing plastic part is a plastic part, which is formed when it is connected with the valve port metal part by injection molding.

[0009] This utility model utilizes injection molding to produce valve port assemblies, offering the advantage of higher production efficiency compared to machining methods. Furthermore, the sealing plastic component is integrally injection-molded, resulting in lower costs. The surface roughness of the sealing plastic component is also good, thereby reducing valve port leakage and improving product performance.

[0010] 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

[0011] Figure 1 This is a structural diagram of a known automotive electronic expansion valve;

[0012] 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

[0013] Figure 2 This is a structural diagram of the vehicle electronic expansion valve of the present utility model;

[0014] 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 body assembly, 25-valve port assembly

[0015] Figure 3 This is a structural diagram of the valve port assembly of the automotive electronic expansion valve of the present utility model;

[0016] 25a-valve port metal parts, 25b-sealing plastic parts DETAILED DESCRIPTION

[0017] like Figure 2 As shown, the present invention primarily comprises a drive coil 1, a valve core assembly 2, and a valve body 3. The valve core assembly 2 further comprises a sleeve stop assembly 21, a rotor needle assembly 22, a guide screw seat 23, a valve seat assembly 24, and a valve port assembly 25. The valve port assembly 25 comprises a sealing plastic component 25b and a valve port metal component 25a. The sealing plastic component 25b and the valve port metal component 25a are integrally joined by injection molding. The sealing plastic component 25b is a plastic part that is formed during the injection molding of the valve port metal component 25a.

[0018] The assembly process of the automotive electronic expansion valve is as follows:

[0019] First, screw the injection-molded 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. Next, install the valve core assembly 2 onto the valve body 3. Finally, fit the drive coil 1 onto the valve core assembly 2. The entire product is assembled.

[0020] The working principle of the automotive electronic expansion valve is as follows:

[0021] 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 assembly 25.

[0022] 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 (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 assembly (25), characterized in that: The valve port assembly (25) is composed of a sealing plastic part (25b) and a valve port metal part (25a).

2. The vehicle electronic expansion valve according to claim 1, characterized in that: The sealing plastic part (25b) and the valve port metal part (25a) are connected into one body through injection molding.

3. The vehicle electronic expansion valve according to claim 2, characterized in that: The sealing plastic part (25b) is a plastic part formed when it is connected with the valve port metal part (25a) by injection molding.

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