Electronic expansion valve

Abstract

The application optimizes the structure of the electronic expansion valve, so that the cross connecting pipe comprises a matching part and a guiding part, the guiding part is necked from the matching part, the guiding part is closer to the step part relative to the matching part, the guiding part is gap matched with the inner circumferential wall, the matching part is tightly matched and welded with the inner circumferential wall, the guiding part comprises an end face part, the end face part abuts against the step part, when the cross connecting pipe is matched with the interface part, the necked guiding part can play a guiding role, so that the cross connecting pipe can be smoothly loaded into the interface part to realize the fixed connection with the valve body.

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. The surface where the opening of the horizontal interface is located has a curvature, which is different from the normal process circular hole where the plane is located. This causes the horizontal tube to be unable to be directly aligned and installed smoothly when it is installed with the horizontal interface.

[0004] Therefore, at least one embodiment of this utility model adopts the following technical solution: This application provides an electronic expansion valve, including a valve body and a horizontal connecting pipe. The valve body includes a cylindrical valve body. The side wall of the cylindrical valve body is provided with an interface portion that penetrates the inner and outer surfaces of the valve body. The interface portion is provided with an inner peripheral wall. The horizontal connecting pipe includes a mating portion and a guide portion that narrows from the mating portion. The interface portion includes a stepped portion. The guide portion is closer to the stepped portion than the mating portion. The guide portion is clearance-fitted with the inner peripheral wall. The mating portion is tightly fitted with the inner peripheral wall and welded and fixed. The guide portion includes an end portion that abuts against the stepped portion.

[0005] This application optimizes the design of the electronic expansion valve structure, making the horizontal pipe include a mating part and a guide part. The guide part is narrowed from the mating part and is closer to the step part than the mating part. The guide part is clearance-fitted with the inner peripheral wall, while the mating part is tightly fitted with the inner peripheral wall and welded for fixation. The guide part includes an end face that abuts against the step part. When the horizontal pipe is mated with the interface part, the narrowed guide part can play a guiding role, allowing the horizontal pipe to be smoothly installed into the interface part to achieve a fixed connection with the valve body. Attached Figure Description

[0006] Figure 1 This is a partial structural cross-sectional schematic diagram of the electronic expansion valve provided by this utility model;

[0007] Figure 2 yes Figure 1 Enlarged structural diagram of part I

[0008] Figure Labels

[0009] Valve body 10, valve seat 11, valve body 12, interface 121, opening 121a, step 1211, inner peripheral wall 1212;

[0010] Horizontal connecting pipe 20, mating part 21, guide part 22 Detailed Implementation

[0011] The specific embodiments of this utility model will now be described with reference to the accompanying drawings.

[0012] 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.

[0013] 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 split structure. The electronic expansion valve also includes a horizontal pipe 20 and a vertical pipe. A vertical interface is provided below the valve seat 11. The vertical pipe is fixedly connected to the vertical interface. The valve body 12 is cylindrical in shape. An interface 121 is provided on the side wall. The interface 121 penetrates the inner and outer surfaces of the side wall of the valve body 12. The interface 121 has an opening 121a. The area where the opening is located has an arc-shaped saddle-shaped structure. The interface 121 has a stepped part 1211 and includes an inner peripheral wall 1212.

[0014] The horizontal connecting pipe 20 includes a mating part 21 and a guide part 22 that narrows from the mating part 21. The outer diameter of the mating part is larger than the outer diameter of the guide part 22. The horizontal connecting pipe 20 is inserted into the interface part 121 through the opening 121a in the radial direction. The inner peripheral wall 1212 is tightly fitted with the mating part 21. The guide part 22 provides guidance during insertion. The inner peripheral wall 1212 and the guide part 22 are loosely fitted. The guide part 22 includes an end face that abuts against the stepped part 1211. After the mating part 21 and the inner peripheral wall 1212 are tightly fitted, a fixed connection is achieved by brazing or laser welding. To achieve better fixation, a flow channel is provided between the mating part 21 and the inner peripheral wall 1212. Specifically, the mating part 21 is provided with a groove recessed from the surface of the mating part. The groove forms part of the channel wall of the flow channel. The part of the inner peripheral wall 1212 corresponding to the groove forms at least another part of the channel wall of the flow channel. The groove penetrates the edge of the mating part. The groove extends along the length direction of the transverse pipe and is spaced apart along the circumference of the mating part. The groove can be a long strip cross-section or a long strip wire groove structure. The flow channel is at least partially filled with solder.

[0015] Through the above-mentioned optimized design of the electronic expansion valve structure, when the horizontal pipe 20 is installed into the interface section radially, even if the area where the opening is located has a saddle-shaped structure with a certain curvature, and it is not possible to achieve a tight fit like a flat surface, the guide part is narrowed from the mating part. The guide part is closer to the step part than the mating part. The guide part is clearance-fitted with the inner peripheral wall, and the mating part is tightly fitted with the inner peripheral wall and welded and fixed. The guide part includes an end face, which abuts against the step part. When the horizontal pipe is fitted with the interface section, the narrowed guide part can play a guiding role, so that the horizontal pipe can be installed into the interface section relatively smoothly to achieve a fixed connection with the valve body.

[0016] This application provides an electronic expansion valve, including a valve body and a transverse connecting pipe. The valve body includes a cylindrical valve body with an interface portion penetrating the inner and outer surfaces of the valve body. The interface portion has an inner peripheral wall. The transverse connecting pipe includes a mating portion and a guide portion that narrows from the mating portion. The interface portion includes a stepped portion. The guide portion is closer to the stepped portion than the mating portion. The guide portion is clearance-fitted with the inner peripheral wall. The mating portion is tightly fitted with the inner peripheral wall and welded to it. The guide portion includes an end face portion that abuts against the stepped portion.

[0017] This application optimizes the design of the electronic expansion valve structure, making the horizontal pipe include a mating part and a guide part. The guide part is narrowed from the mating part and is closer to the step part than the mating part. The guide part is clearance-fitted with the inner peripheral wall, while the mating part is tightly fitted with the inner peripheral wall and welded for fixation. The guide part includes an end face that abuts against the step part. When the horizontal pipe is mated with the interface part, the narrowed guide part can play a guiding role, allowing the horizontal pipe to be smoothly installed into the interface part to achieve a fixed connection with the valve body.

[0018] 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, It includes a valve body and a horizontal pipe. The valve body includes a cylindrical valve body. The side wall of the cylindrical valve body is provided with an interface portion that penetrates the inner and outer surfaces of the valve body. The interface portion is provided with an inner peripheral wall. The transverse connecting pipe includes a mating part and a guide part that narrows from the mating part. The interface part includes a stepped part. The guide part is closer to the stepped part than the mating part. The guide part is clearance-fitted with the inner peripheral wall. The mating part is tightly fitted with the inner peripheral wall and welded and fixed. The guide part includes an end face that abuts against the stepped part.

2. The electronic expansion valve according to claim 1, characterized in that, The interface section has an opening, and the area where the opening is located has a saddle-shaped structure. The horizontal pipe is inserted into the interface section radially through the opening.

3. The electronic expansion valve according to claim 1, characterized in that, There is a flow channel between the mating part and the inner peripheral wall.

4. An electronic expansion valve according to claim 3, characterized in that, The mating part is provided with a groove recessed from the surface of the mating part, the groove forming a part of the channel wall of the flow guiding channel, and the part of the mating part corresponding to the groove forming at least another part of the channel wall of the flow guiding channel.

5. An electronic expansion valve according to claim 4, characterized in that, The groove extends through the edge of the mating part, and the groove extends along the length direction of the horizontal pipe and is spaced apart circumferentially along the mating part.

6. An electronic expansion valve according to claim 5, characterized in that, The groove is a cross-section or a long strip drawing groove structure.

7. An electronic expansion valve according to any one of claims 3-6, characterized in that, The flow channel is at least partially filled with solder.

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