Electronic expansion valve

Abstract

The application optimizes the structure of the electronic expansion valve, and sets an arc surface part and a plane part on the valve body, and sets an interface part which penetrates the outer surface of the plane part, and the cross pipe is installed in the interface part from the opening of the interface part, and the contact surface is relatively flat when the cross pipe contacts with the plane part, and the opening cross pipe is more convenient and smooth to install on the plane part.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration control technology, specifically to an electronic expansion valve. Background Technology

[0002] Electronic expansion valves are commonly used in refrigeration systems to regulate the flow of refrigerant. The valve body has a horizontal interface and a vertical interface to achieve fixed connection with the horizontal pipe and the vertical pipe respectively. The refrigerant can enter from the horizontal pipe, pass through the valve chamber and valve port, and flow out from the vertical pipe. Conversely, the refrigerant can also enter from the vertical pipe, pass through the valve port and valve chamber, and flow out from the horizontal pipe to achieve bidirectional flow of refrigerant. However, when fixing the horizontal pipe and the horizontal interface, there is often a situation where the horizontal pipe gets stuck in the horizontal interface and cannot be installed smoothly. Utility Model Content

[0003] Through long-term research, the inventors discovered that the main reason for the above-mentioned problems is that the valve body adopts a cylindrical structure with a saddle-shaped horizontal interface. Unlike the vertical interface machined on the plane below the valve body that cooperates with the vertical pipe, the surface where the opening of the horizontal interface is located has a curvature, which causes the horizontal pipe to be unable to be directly aligned and smoothly installed when it is installed.

[0004] Therefore, at least one embodiment of this utility model adopts the following technical solution:

[0005] An electronic expansion valve is characterized by comprising a valve body and a transverse connecting pipe. The valve body includes an arc-shaped portion and a flat portion arranged circumferentially thereon. The two sides of the flat portion are respectively connected to the arc-shaped portion. The valve body is provided with an interface portion that penetrates the outer surface of the flat portion. The interface portion includes a stepped portion. A portion of the transverse connecting pipe is located inside the interface portion. The transverse connecting pipe includes an outer peripheral wall and an end portion. The outer peripheral wall is directly or indirectly fitted to the interface portion and welded and fixed. The end portion directly or indirectly abuts against the stepped portion.

[0006] This application optimizes the design of the electronic expansion valve structure by providing an arc-shaped part and a flat part on the valve body, as well as an interface part. The interface part penetrates the outer surface of the flat part, and the horizontal pipe is inserted into the interface part through the opening of the interface part. When the horizontal pipe contacts the flat part, the contact surface is relatively flat. The horizontal pipe is more convenient to be inserted smoothly because it has an opening on the flat part. Attached Figure Description

[0007] Figure 1 This is a partial structural cross-sectional schematic diagram of the electronic expansion valve provided by this utility model;

[0008] Figure 2 yes Figure 1 A schematic diagram of the three-dimensional structure;

[0009] Figure 3 yes Figure 1 A schematic diagram of the enlarged structure of part I;

[0010] Figure 4 This is an enlarged structural schematic diagram of another embodiment of the electronic expansion valve provided by this utility model;

[0011] Figure Labels

[0012] Valve body 10, valve seat 11, valve body 12, flat part 121, arc-shaped part 122

[0013] Interface 1211, opening 1211a, step 12111, mating part 12112;

[0014] Horizontal connector 20, end face 21;

[0015] Bushing 30, end face 31 Detailed Implementation

[0016] The specific embodiments of this utility model will now be described with reference to the accompanying drawings.

[0017] Furthermore, all descriptions of the embodiments in this specification are based on the contents of the accompanying drawings. The directional terms such as "up," "down," "inner," and "outer" used in the text are descriptions made in reference to the accompanying drawings. Their purpose is to facilitate the description of this utility model and should not be regarded as a limitation of this utility model.

[0018] Referring to the figure, the electronic expansion valve includes a valve body 10, which includes a valve seat 11 with a valve port and a valve body 12. The valve seat 11 and the valve body 12 can be fixedly connected by brazing. In other feasible embodiments, the valve body 10 can also be an integral structure formed by machining. In this embodiment, the valve body 10 is described as a separate structure. The electronic expansion valve also includes a horizontal pipe 20 and a vertical pipe 20. A vertical interface is provided below the valve seat 11, and the vertical pipe is fixedly connected to the vertical interface. The valve body 12 includes a flat part 121 and an arcuate part 122 arranged circumferentially. The two sides of the flat part 121 are respectively connected to the arcuate part 122. The valve body can be machined on the originally cylindrical valve body. A flat surface is machined out of the cross section to be fixedly connected to the horizontal pipe 20. The valve body 12 is provided with an interface portion 1211, which penetrates the outer surface of the flat portion 121. The interface portion 1211 is provided with an opening 1211a. The horizontal pipe 20 can be installed into the interface portion 1211 through the opening 1211a. The interface portion 1211 also includes a stepped portion 12111 and a mating portion 12112. The horizontal pipe 20 includes an end portion, which is provided with an end face 21. In one embodiment, the end portion is at least partially located in the interface portion 1211. The end face 21 directly abuts against the stepped portion 12111, and the outer peripheral wall of the end portion is directly fitted with the mating portion 12112. After that, a fixed connection can be achieved by brazing or laser welding.

[0019] In another embodiment, the electronic expansion valve further includes a bushing 30, which includes an end face 31. The bushing 30 is fitted over the outer periphery of the transverse tube 20 and fixedly connected thereto. The end face 31 is closer to the step portion 12111 than the end face 21. The end face 31 abuts against the step portion 12111. The transverse tube 20 indirectly abuts against the step portion 12111 through the bushing 30. In this embodiment, the outer peripheral wall of the bushing 30 and the mating portion 12111 are tightly fitted and fixedly connected by brazing or laser welding. Furthermore, to facilitate the connection between the bushing and the valve body, the two components can be made of the same material, such as stainless steel.

[0020] This application optimizes the design of the electronic expansion valve structure by providing an arc-shaped part and a flat part on the valve body, as well as an interface part. The interface part penetrates the outer surface of the flat part, and the horizontal pipe is inserted into the interface part through the opening of the interface part. When the horizontal pipe contacts the flat part, the contact surface is relatively flat. Compared with the curved saddle-shaped part, it is easier and smoother to insert the horizontal pipe with the opening on the flat part.

[0021] This application provides an electronic expansion valve, including a valve body and a transverse connecting pipe. The valve body includes an arc-shaped portion and a flat portion arranged circumferentially. The two sides of the flat portion are respectively connected to the arc-shaped portion. The valve body is provided with an interface portion that penetrates the outer surface of the flat portion. The interface portion includes a stepped portion. Part of the transverse connecting pipe is located inside the interface portion. The transverse connecting pipe includes an outer peripheral wall and an end portion. The outer peripheral wall is directly or indirectly fitted to the interface portion and welded and fixed. The end portion directly or indirectly abuts against the stepped portion.

[0022] This application optimizes the design of the electronic expansion valve structure by providing an arc-shaped part and a flat part on the valve body, as well as an interface part. The interface part penetrates the outer surface of the flat part, and the horizontal pipe is inserted into the interface part through the opening of the interface part. When the horizontal pipe contacts the flat part, the contact surface is relatively flat. The horizontal pipe is more convenient to be inserted smoothly because it has an opening on the flat part.

[0023] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An electronic expansion valve, characterized in that, The device includes a valve body and a horizontal connecting pipe. The valve body includes an arc-shaped portion and a flat portion arranged circumferentially on the valve body. The two sides of the flat portion are respectively connected to the arc-shaped portion. The valve body has an interface portion that penetrates the outer surface of the flat portion. The interface portion includes a stepped portion. Part of the horizontal connecting pipe is located inside the interface portion. The horizontal connecting pipe includes an outer peripheral wall and an end portion. The outer peripheral wall is directly or indirectly fitted and welded to the interface portion. The end portion directly or indirectly abuts against the stepped portion.

2. The electronic expansion valve according to claim 1, characterized in that, The horizontal pipe includes an end portion, which is at least partially located within the interface portion. The interface portion includes a mating portion, and the outer peripheral wall of the end portion is directly fitted and welded to the mating portion for fixation.

3. The electronic expansion valve according to claim 1, characterized in that, The end face directly abuts against the stepped portion.

4. An electronic expansion valve according to claim 1, characterized in that, It also includes a bushing, which is fitted over the horizontal pipe and fixedly connected to it. The interface includes a mating part, and the outer peripheral wall of the bushing is tightly fitted to the mating part and welded to it.

5. An electronic expansion valve according to claim 1, characterized in that, It also includes a bushing, the bushing having an end face that is closer to the step portion than the end face, the end face abutting against the step portion.

6. An electronic expansion valve according to claim 5, characterized in that, The valve body and the bushing are made of the same material.

7. An electronic expansion valve according to any one of claims 1-5, characterized in that, The valve body includes a valve seat with a valve port portion and a valve body. The valve seat and the valve body are fixedly connected or are an integral structure. The flat portion and the arcuate portion are disposed on the valve body.

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