Electronic expansion valve

Abstract

The application optimizes the structure of the electronic expansion valve, so that the interface part of the valve body comprises a matching part and a step part, the matching part comprises a first matching part and a second matching part, the first matching part is closer to the step part than the second matching part, the first matching part is tightly matched with the outer peripheral part of the cross connection pipe, the second matching part is gap matched with the outer peripheral part of the cross connection pipe, the second matching part plays a guiding role in positioning the cross connection pipe when the cross connection pipe is installed with the interface part, and the cross connection pipe can be relatively smoothly installed in 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 an arc, which is different from the normal process circular hole on the plane below the valve body that mates with the vertical tube. This results in the horizontal tube and the horizontal interface not being able to be directly aligned and installed smoothly.

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

[0005] This application provides an electronic expansion valve, including 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 includes a mating portion and a step portion. The mating portion includes a first mating portion and a second mating portion. The first mating portion is closer to the step portion than the second mating portion.

[0006] The horizontal pipe includes an end portion, which includes an abutting portion and an outer peripheral portion. The abutting portion abuts against the stepped portion, the first mating portion is tightly fitted with the outer peripheral portion, and the second mating portion is loosely fitted with the outer peripheral portion.

[0007] This application optimizes the design of the fit structure between the valve body and the horizontal pipe of the electronic expansion valve. The interface of the valve body includes a fitting part and a stepped part. The fitting part includes a first fitting part and a second fitting part. The first fitting part is closer to the stepped part than the second fitting part. The first fitting part is tightly fitted with the outer periphery of the horizontal pipe, while the second fitting part is loosely fitted with the outer periphery of the horizontal pipe. When the horizontal pipe is installed with the interface, the second fitting part plays a guiding role in pre-positioning the horizontal pipe, allowing the horizontal pipe to be installed relatively smoothly into the interface to achieve a fixed connection with the valve body. Attached Figure Description

[0008] Figure 1 This is a partial structural cross-sectional schematic diagram of the electronic expansion valve provided by this utility model;

[0009] Figure 2 yes Figure 1 An enlarged schematic diagram of part I;

[0010] Figure 3 This is a cross-sectional view of the valve body of the electronic expansion valve provided by this utility model;

[0011] Figure 4 This is a frontal view of the horizontal pipe provided by this utility model;

[0012] Figure 5 yes Figure 4 An enlarged schematic diagram of part I;

[0013] Figure Labels

[0014] Valve body 10, valve seat 11, valve body 12, interface 121, opening 121a, step 1211, mating part 1212, first mating part 1212a, second mating part 1212b;

[0015] Horizontal pipe 20, end 21, abutment part 211, outer peripheral part 212, groove 213, cross section 2132, flow guide channel S; 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] refer to Figure 1-5As shown, 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. 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 is generally cylindrical, and an interface is provided on the side wall. 121, the interface portion 121 penetrates the inner and outer surfaces of the side wall of the valve body 12. The interface portion 121 has an opening, and the area where the opening is located has an arc-shaped saddle-shaped structure. The interface portion 121 is provided with a stepped portion 1211 and a mating portion 1212. The mating portion 1212 includes a first mating portion 1212a and a second mating portion 1212b, wherein the first mating portion 1212a is closer to the stepped portion 1211 than the second mating portion 1212b. The inner diameter of the first mating portion 1212a is smaller than the inner diameter of the second mating portion 1212b. (The text abruptly ends here, likely due to an incomplete sentence or missing information.) The valve body 20 includes an end portion 21, which includes a stop portion 211 and an outer peripheral portion 212. The transverse pipe 20 is installed into the interface portion 121 radially along the valve body. The second mating portion 1212b provides a guiding and pre-positioning function for the end portion 21 of the transverse pipe 20, allowing the transverse pipe 20 to be smoothly installed into the interface portion 121. After installation, the stop portion 211 abuts against the stepped portion 1211, the first mating portion 1212a is tightly fitted with the outer peripheral portion 212, and the second mating portion 1212b is loosely fitted with the outer peripheral portion 212. It should be noted that the second mating portion 1212b... It can be a structure with an equal inner diameter or a conical structure. The cross-sectional area of ​​the second mating part on the side closer to the first mating part is smaller than the cross-sectional area of ​​the second mating part on the side farther away from the first mating part. By setting it like this, the gap between the second mating part and the outer periphery 212 of the short part 21 can be reduced from large to small, which can also achieve the technical effect of this application. With the above design, when the horizontal pipe and the interface part are installed, the second mating part plays a guiding role in the pre-positioning of the horizontal pipe. The horizontal pipe can be inserted relatively smoothly from the saddle-shaped opening of the interface part to achieve a fixed connection with the valve body.

[0019] Furthermore, a flow channel S is formed between the end portion 21 and the mating portion 1212. The end portion 21 is provided with a groove 213, which is recessed inward from the surface of the outer peripheral portion 212. The groove 213 extends along the length direction of the transverse pipe 20 and passes through the edge of the end portion 21 to facilitate the flow of solder. Multiple elongated grooves 213 are spaced circumferentially along the end portion 21. The grooves 213 form part of the channel wall of the flow channel S. The mating portion 1212, which is provided corresponding to the groove, forms at least another part of the channel wall of the flow channel S. The flow channel S is at least partially filled with solder to better fix the transverse pipe and the valve body. The groove 213 can be a cross-section portion 2131 or an elongated wire drawing groove. The specific structure of the groove 213 is not limited.

[0020] This application provides an electronic expansion valve, including a valve body and a horizontal pipe. The valve body includes a cylindrical valve body and an interface portion that penetrates the inner and outer surfaces of the valve body. The interface portion includes a mating portion and a stepped portion. The mating portion includes a first mating portion and a second mating portion. The first mating portion is closer to the stepped portion than the second mating portion.

[0021] The horizontal pipe includes an end portion, which includes an abutting portion and an outer peripheral portion. The abutting portion abuts against the stepped portion, the first mating portion is tightly fitted with the outer peripheral portion, and the second mating portion is loosely fitted with the outer peripheral portion.

[0022] This application optimizes the design of the fit structure between the valve body and the horizontal pipe of the electronic expansion valve. The interface of the valve body includes a fitting part and a stepped part. The fitting part includes a first fitting part and a second fitting part. The first fitting part is closer to the stepped part than the second fitting part. The first fitting part is tightly fitted with the outer periphery of the horizontal pipe, while the second fitting part is loosely fitted with the outer periphery of the horizontal pipe. When the horizontal pipe is installed with the interface, the second fitting part plays a guiding role in pre-positioning the horizontal pipe, allowing the horizontal pipe to be installed relatively smoothly into the interface to achieve a fixed connection with the valve body.

[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 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 includes a mating portion and a stepped portion. The mating portion includes a first mating portion and a second mating portion. The first mating portion is closer to the stepped portion than the second mating portion. The horizontal connecting pipe includes an end portion, which includes an abutting portion and an outer peripheral portion. The abutting portion abuts against the stepped portion, the first mating portion is tightly fitted with the outer peripheral portion, and the second mating portion is loosely fitted with the outer peripheral portion.

2. The electronic expansion valve according to claim 1, characterized in that, The end portion is at least partially located within the interface portion, which has an opening. The area where the opening is located has a saddle-shaped structure, and the cross tube is inserted into the interface portion through the opening.

3. The electronic expansion valve according to claim 1, characterized in that, A flow channel is formed between the mating part and the outer peripheral part, and the flow channel is at least partially filled with solder.

4. An electronic expansion valve according to claim 3, characterized in that, The end portion is further provided with a groove, which is recessed inward from the surface of the outer periphery. The groove forms part of the channel wall of the flow guiding channel, and the mating portion corresponding to the groove forms 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 end and is provided along the length direction of the transverse pipe and is spaced circumferentially along the end.

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 1-6, characterized in that, The cross section of the second mating part closer to the first mating part is smaller than the cross section of the second mating part farther from the first mating part.

8. An electronic expansion valve according to any one of claims 1-6, characterized in that, The valve body includes a valve body and a valve seat with a valve port portion. The valve body and the valve seat are either separate or integral.

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