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 bushing is sleeved on the cross connecting pipe and fixedly connected with the cross connecting pipe, the bushing comprises a cylindrical part, the first matching part is tightly matched with the cylindrical part, the second matching part is gap matched with the cylindrical part, the cross connecting pipe comprises an end face part, the end face part directly or indirectly abuts against the step part, when the cross connecting pipe is installed with the interface part, the second matching part plays a guiding role in pre-positioning of the bushing, so that the cross connecting 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, a horizontal pipe and a bushing. 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 bushing is fitted onto the horizontal tube and fixedly connected to it. The bushing includes a cylindrical portion, a first mating portion that fits tightly with the cylindrical portion, and a second mating portion that fits loosely with the cylindrical portion. The horizontal tube includes an end face that abuts directly or indirectly against the stepped portion.

[0007] This application optimizes the design of the electronic expansion valve structure, making the valve body's interface portion include a mating portion and a stepped portion. The mating portion includes a first mating portion and a second mating portion, with the first mating portion being closer to the stepped portion than the second mating portion. A bushing is fitted over a horizontal connecting pipe and fixedly connected to it. The bushing includes a cylindrical portion, with the first mating portion tightly fitted to the cylindrical portion and the second mating portion loosely fitted to the cylindrical portion. The horizontal connecting pipe includes an end portion, which directly or indirectly abuts against the stepped portion. When the horizontal connecting pipe is installed with the interface portion, the second mating portion guides the bushing to a pre-positioning position, allowing the horizontal connecting pipe to be smoothly inserted into the interface portion to achieve a fixed connection with the valve body.

[0008] This application also provides an electronic expansion valve, including a valve body, a horizontal pipe and a bushing. 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.

[0009] The bushing includes a cylindrical portion with an end face. The cylindrical portion is sleeved on the horizontal tube and fixedly connected to the horizontal tube. A first mating portion is tightly fitted with the cylindrical portion, and a second mating portion is loosely fitted with the cylindrical portion. The horizontal tube includes an end face, and both the end face and the end face abut against the stepped portion.

[0010] This application optimizes the design of the electronic expansion valve structure, making the valve body's interface portion include a mating portion and a stepped portion. The mating portion includes a first mating portion and a second mating portion, with the first mating portion being closer to the stepped portion than the second mating portion. A bushing is fitted over a horizontal connecting pipe and fixedly connected to it. The bushing includes a cylindrical portion, with the first mating portion tightly fitted to the cylindrical portion and the second mating portion loosely fitted to the cylindrical portion. The cylindrical portion includes an end face, and the horizontal connecting pipe includes an end face. Both the end face and the end face abut against the stepped portion. When the horizontal connecting pipe is installed with the interface portion, the second mating portion guides the bushing to a pre-positioning position, allowing the horizontal connecting pipe to be smoothly inserted into the interface portion to achieve a fixed connection with the valve body. Attached Figure Description

[0011] Figure 1 This is a partial structural cross-sectional schematic diagram of the electronic expansion valve provided by this utility model;

[0012] Figure 2 yes Figure 1 A schematic diagram of the enlarged structure of part I;

[0013] Figure 3 This is a partial structural cross-sectional schematic diagram of another embodiment of the electronic expansion valve provided by this utility model;

[0014] Figure 4 yes Figure 3 A schematic diagram of the enlarged structure of part I;

[0015] Figure 5 This is a cross-sectional schematic diagram of the bushing of another embodiment of the electronic expansion valve provided by this utility model;

[0016] Figure 6 This is a schematic diagram of the bushing and interface portion of another embodiment of the electronic expansion valve provided by this utility model.

[0017] Figure Labels

[0018] 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;

[0019] Horizontal connector 20, connector step 22, end face 23

[0020] Bushing 30, cylindrical part 31, flanged part 32, abutting part 33, outer peripheral wall 311, bushing 30a, cylindrical part 31a, abutting part 33a, outer peripheral wall 311a, groove 3111a, end face 32a, guide channel S; Detailed Implementation

[0021] The specific embodiments of this utility model will now be described with reference to the accompanying drawings.

[0022] 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.

[0023] First Embodiment

[0024] 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. 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 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, and the area where the opening is located has an arc-shaped saddle-shaped structure. The expansion valve 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 electronic expansion valve also includes a bushing 30, which includes a cylindrical portion 31 and a flanged portion 32. The flanged portion 32 is folded inward from the cylindrical portion 31. The cylindrical portion 31 includes an outer peripheral wall 311 and an abutting portion 33 away from the flanged portion 32. The transverse pipe 20 includes a small diameter portion and a large diameter portion. A pipe step portion 22 is formed between the small diameter portion and the large diameter portion. The abutting portion 33 abuts against the step portion 22. The peripheral wall 311 and the outer peripheral wall of the large-diameter portion of the transverse pipe 20 are coplanar. This arrangement effectively reduces the bushing wall thickness radially, especially for smaller-diameter interfaces, enabling a compact design and proper connection. The transverse pipe 20 also includes an end face 23, where one side of the flange 32 abuts against the end face 23, and the other side of the flange 32, away from the end face 23, abuts against the step 1211. The end face 23 of the transverse pipe 20 indirectly abuts against the step 1211 via the flange 32. The transverse pipe 20 is inserted radially into the interface 121 from the opening along the valve body 10. The inner diameter of the second mating part 1212b is larger than the outer diameter of the cylindrical part 31, and the second mating part 1212b serves as a guide for pre-positioning the transverse pipe 20. After installation, the second mating part 1212b is clearance-fitted with the outer peripheral wall 311 of the cylindrical part 31, and the first mating part 1212a is tight-fitted with the outer peripheral wall 311 of the cylindrical part 31. The other side of the flanged part 32 away from the end face 23 abuts against the stepped part 1211. Through the above design, when the horizontal pipe and the interface part are installed, the second mating part plays a pre-positioning guiding role for the bushing, so that the horizontal pipe can be relatively smoothly installed into the interface part to achieve a fixed connection with the valve body. It should be noted that in order to achieve a better guiding role for the bushing and expand the mating clearance between the two, the cross section of the second mating part 1212b on the side closer to the first mating part 1212a can be smaller than the cross section of the second mating part 1212b on the side away from the first mating part 1212a.

[0025] Furthermore, a flow guiding gap S is formed between the cylindrical portion 31 and the mating portion 1212 of the bushing 30. The flow guiding gap S is at least partially filled with solder. The cylindrical portion 31 is provided with a groove 3111. The groove 3111 is recessed from the surface of the outer peripheral wall 311. The groove 3111 penetrates the edge of the cylindrical portion 31. The grooves 3111 are spaced apart along the circumference of the cylindrical portion 31 and extend along the length direction of the bushing. The groove forms part of the channel wall of the flow guiding channel. The mating portion 1212 provided corresponding to the groove forms at least another part of the channel wall of the flow guiding channel. The groove 3111 can be a long strip cross-section or a long strip drawing groove structure. The specific structure of the groove is not limited here.

[0026] Second Embodiment

[0027] Compared to the first embodiment, in this embodiment, the bushing 30a omits the flanged portion and includes a cylindrical portion 31a. The cylindrical portion 31a is fitted over the outer periphery of the small-diameter portion of the transverse pipe 20. The cylindrical portion 31a includes an abutment portion 33a and an end portion 32a on the side away from the abutment portion 33a. The end portion 32a is flush with the end portion 23 of the transverse pipe 20. When flush, the end portion 32a and the end portion 23 abut against the step portion 1211 simultaneously. Alternatively, the end portion 32a may be further away from the step portion 1211 than the end portion 23, in which case the end portion 23 of the transverse pipe 20 abuts directly against the step portion 1211, thus achieving the same technical effect. The bushing 30a and the mating portion 1212 are provided with a flow channel, and the bushing 30a is provided with a groove structure 3111a, etc., which have been described in detail in the first embodiment and will not be repeated here.

[0028] This application provides an electronic expansion valve, including a valve body, a horizontal pipe and a bushing. 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.

[0029] The bushing is fitted onto the horizontal tube and fixedly connected to it. The bushing includes a cylindrical portion, a first mating portion that fits tightly with the cylindrical portion, and a second mating portion that fits loosely with the cylindrical portion. The horizontal tube includes an end face that abuts directly or indirectly against the stepped portion.

[0030] This application optimizes the design of the electronic expansion valve structure, making the valve body's interface portion include a mating portion and a stepped portion. The mating portion includes a first mating portion and a second mating portion, with the first mating portion being closer to the stepped portion than the second mating portion. A bushing is fitted over a horizontal connecting pipe and fixedly connected to it. The bushing includes a cylindrical portion, with the first mating portion tightly fitted to the cylindrical portion and the second mating portion loosely fitted to the cylindrical portion. The horizontal connecting pipe includes an end portion, which directly or indirectly abuts against the stepped portion. When the horizontal connecting pipe is installed with the interface portion, the second mating portion guides the bushing to a pre-positioning position, allowing the horizontal connecting pipe to be smoothly inserted into the interface portion to achieve a fixed connection with the valve body.

[0031] This application also provides an electronic expansion valve, including a valve body, a horizontal pipe and a bushing. The valve body includes a cylindrical valve body. The 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.

[0032] The bushing includes a cylindrical portion with an end face. The cylindrical portion is sleeved on the horizontal tube and fixedly connected to the horizontal tube. A first mating portion is tightly fitted with the cylindrical portion, and a second mating portion is loosely fitted with the cylindrical portion. The horizontal tube includes an end face, and both the end face and the end face abut against the stepped portion.

[0033] This application optimizes the design of the electronic expansion valve structure, making the valve body's interface portion include a mating portion and a stepped portion. The mating portion includes a first mating portion and a second mating portion, with the first mating portion being closer to the stepped portion than the second mating portion. A bushing is fitted over a horizontal connecting pipe and fixedly connected to it. The bushing includes a cylindrical portion, with the first mating portion tightly fitted to the cylindrical portion and the second mating portion loosely fitted to the cylindrical portion. The cylindrical portion includes an end face, and the horizontal connecting pipe includes an end face. Both the end face and the end face abut against the stepped portion. When the horizontal connecting pipe is installed with the interface portion, the second mating portion guides the bushing to a pre-positioning position, allowing the horizontal connecting pipe to be smoothly inserted into the interface portion to achieve a fixed connection with the valve body.

[0034] 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, a horizontal pipe, and a bushing. 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 bushing is fitted over the horizontal connecting pipe and fixedly connected to it. The bushing includes a cylindrical portion, the first mating portion is tightly fitted to the cylindrical portion, and the second mating portion is loosely fitted to the cylindrical portion. The horizontal connecting pipe includes an end face, which directly or indirectly abuts against the stepped portion.

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

3. The electronic expansion valve according to claim 1, characterized in that, The bushing includes a flanged portion that is folded inward from the cylindrical portion, one side of the flanged portion abutting against the end face, and the other side of the flanged portion away from the end face abutting against the stepped portion.

4. An electronic expansion valve according to claim 1, characterized in that, The cylindrical portion includes an end face, which is flush with the end face or further away from the step portion relative to the end face, and the end face directly abuts against the step portion.

5. An electronic expansion valve according to any one of claims 1-4, characterized in that, A flow channel is formed between the mating part and the cylindrical part, and the flow channel is at least partially filled with solder.

6. An electronic expansion valve according to claim 5, characterized in that, The cylindrical portion is provided with a groove, which is recessed from the surface of the outer peripheral wall of the cylindrical portion. The groove forms part of the channel wall of the flow guiding channel, and the mating portion provided corresponding to the groove forms at least another part of the channel wall of the flow guiding channel.

7. An electronic expansion valve according to claim 6, characterized in that, The groove extends through the edge of the cylindrical portion, and the groove extends along the length direction of the bushing and is spaced apart circumferentially along the cylindrical portion.

8. An electronic expansion valve according to claim 7, characterized in that, The groove is a cross-section or a long strip drawing groove structure.

9. An electronic expansion valve according to any one of claims 1-4, 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.

10. An electronic expansion valve according to any one of claims 1-4, characterized in that, The transverse connector includes a small diameter portion and a large diameter portion, with a connector step portion formed between the small diameter portion and the large diameter portion. The cylindrical portion is sleeved on the outer periphery of the small diameter portion. The cylindrical portion includes an abutting portion that abuts against the step portion. The outer peripheral wall of the cylindrical portion is coplanar with the outer peripheral wall of the large diameter portion.

11. An electronic expansion valve, characterized in that, The device includes a valve body, a horizontal pipe, and a bushing. 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 bushing includes a cylindrical portion with an end face. The cylindrical portion is sleeved on the horizontal connecting pipe and fixedly connected to the horizontal connecting pipe. The first mating portion is tightly fitted with the cylindrical portion, and the second mating portion is loosely fitted with the cylindrical portion. The horizontal connecting pipe includes an end face, and both the end face and the end face abut against the stepped portion.

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