Connecting pipe structure of electronic expansion valve

Abstract

This application relates to a connecting pipe structure for an electronic expansion valve. The connecting pipe is installed on the valve seat of the electronic expansion valve, and the inner cavity of the connecting pipe communicates with the inner cavity of the electronic expansion valve. A filter is installed inside the connecting pipe, and a cap is installed at the end of the connecting pipe. This utility model integrates the filter directly inside the connecting pipe, which can not only achieve the filtering effect of the medium, but also avoid the cumbersome assembly and poor sealing problems caused by the need to install a filter separately during pipeline connection. Furthermore, by setting a cap structure at the end of the connecting pipe, it is easy to connect to external pipelines, which can not only improve the structural strength of the connecting pipe opening, but also achieve the effect of rapid assembly.

Description

Technical Field

[0001] This application relates to the field of electronic expansion valve technology, and in particular to a connecting pipe structure for an electronic expansion valve. Background Technology

[0002] An electronic expansion valve is an actuator that uses electronic control technology to precisely regulate the flow of refrigerant. It is widely used in refrigeration systems such as air conditioners, freezers, and heat pumps. It mainly uses a stepper motor to drive the valve needle to move, thereby adjusting the valve opening and achieving precise control of the refrigerant flow in the system. It has advantages such as fast response, high adjustment accuracy, and significant energy saving.

[0003] Existing electronic expansion valves typically have two connecting pipes, one for refrigerant inlet and one for refrigerant outlet, connecting the upstream and downstream piping of the refrigeration system and facilitating refrigerant flow. However, the existing connecting pipe structure has some shortcomings in use. For example, existing connecting pipes lack integrated filters, allowing impurities in the refrigerant to directly enter the valve body, causing problems such as valve core jamming, adjustment malfunction, or shortened lifespan. Alternatively, while existing products may have filtration functions, the filter needs to be installed separately when connecting the connecting pipe to external piping, increasing the system's assembly complexity and leading to poor overall sealing and reliability. Furthermore, the ends of existing connecting pipes need to be connected to external piping in actual use, but during the connection process, it is difficult to accurately control the insertion depth of the external piping, easily leading to inaccurate positioning and unstable assembly, thus affecting the system's sealing and connection reliability. Utility Model Content

[0004] To address the problems mentioned in the background art, such as the lack of integrated filters in the connecting pipes, the complexity of filter installation, and the difficulty in controlling the insertion depth of the connecting pipes, this application provides a connecting pipe structure for an electronic expansion valve.

[0005] The connecting pipe structure of the electronic expansion valve provided in this application adopts the following technical solution: A connecting pipe structure for an electronic expansion valve, wherein the connecting pipe is installed on the valve seat of the electronic expansion valve and the inner cavity of the connecting pipe is in communication with the inner cavity of the electronic expansion valve, a filter is installed inside the connecting pipe, and a pipe cap is installed at the end of the connecting pipe.

[0006] By adopting the above technical solution, the filter is directly integrated inside the connecting pipe, which can not only filter the medium, but also avoid the problems of complicated assembly and poor sealing caused by the need to install a filter separately during the pipeline connection process. In addition, by setting a pipe cap structure at the end of the connecting pipe, it is easy to connect to external pipelines and achieve the effect of rapid assembly.

[0007] Optionally, the cap is fitted inside the opening of the connecting pipe and is fixedly connected to the connecting pipe.

[0008] By adopting the above technical solution, the outer wall of the cap is made to fit snugly against the inner wall of the connecting pipe, achieving a precise fit between the two, enhancing the structural strength of the pipe opening, and avoiding damage to the pipe opening during pipe connection.

[0009] Optionally, the outer end of the cap extends to the outside of the connecting pipe and bends radially to form a bend. A welding ring is provided between the bend and the end of the connecting pipe to weld and fix the cap to the connecting pipe. The inner end of the cap is bent towards the center to form a limiting part.

[0010] By adopting the above technical solution, the bending part can, on the one hand, limit the axial movement of the cap, and on the other hand, create a gap between the bending part and the end of the connecting pipe, so that the welding ring can be placed in the annular gap, thereby improving the structural stability of the cap after welding.

[0011] Optionally, the connecting pipe has a flared end, and the cap is installed inside the flared end.

[0012] By adopting the above technical solution and through the structural design of the flared part, on the one hand, the structural strength of the pipe opening can be improved, preventing it from easily deforming; on the other hand, the flared part increases the inner diameter of the pipe opening, which makes it easier to keep the inner diameter of the pipe cap relatively consistent with the middle diameter of the connecting pipe after the pipe cap is installed, thus avoiding turbulence problems when the fluid flows through it.

[0013] Optionally, the end of the filter abuts against the end face of the pipe cap, and the filter is fixed inside the connecting pipe by means of spinning or pressing on the connecting pipe.

[0014] By adopting the above technical solution, the filter and the cap are designed to abut against each other at the front and rear ends inside the connecting pipe to prevent damage to the filter when the external pipeline is connected.

[0015] Optionally, one end of the filter is placed inside the cap, and the middle step of the filter abuts against the limiting part, and the filter is fixedly connected to the cap.

[0016] By adopting the above technical solution, the filter is placed inside the cap, and after the cap and filter are assembled, they can be directly assembled into the connecting pipe, which helps to improve assembly efficiency.

[0017] Optionally, there are two connecting pipes, including a first connecting pipe and a second connecting pipe. The first connecting pipe is installed at the end of the valve seat, and the second connecting pipe is installed on the circumferential side of the valve seat.

[0018] By adopting the above technical solution, two connecting pipes are set up for liquid inlet and liquid outlet respectively, ensuring the normal operation of the electronic expansion valve.

[0019] Optionally, the first connecting pipe is a straight pipe with its centerline parallel to the centerline of the valve seat; the second connecting pipe is an L-shaped bend or a straight pipe.

[0020] Optionally, the first connecting pipe is an L-shaped bend or a straight pipe; the second connecting pipe is a straight pipe, and its centerline is perpendicular to the centerline of the valve seat.

[0021] By adopting the above technical solutions, different pipe shapes can be used to meet the pipeline connection requirements in different scenarios, thereby expanding the application range of electronic expansion valves.

[0022] Optionally, both the connecting pipe and the cap are made of copper.

[0023] By adopting the above technical solution, both the connecting pipe and the cap are made of copper, which has good thermal conductivity, weldability and corrosion resistance. This not only facilitates welding with other copper pipes in the refrigeration system, ensuring a firm and reliable connection, but also improves the overall sealing performance and service life.

[0024] In summary, this application includes at least one of the following beneficial technical effects: This invention integrates the filter directly inside the connecting pipe, which not only filters the medium but also avoids the cumbersome assembly and poor sealing problems caused by installing a separate filter during pipeline connection. Furthermore, by setting a cap structure at the end of the connecting pipe, it facilitates connection to external pipelines, improves the structural strength of the connecting pipe opening, and enables rapid assembly. Attached Figure Description

[0025] Figure 1 This is a structural diagram of Embodiment 1 of the present invention; Figure 2 This is a partial enlarged view of Embodiment 1 of this utility model; Figure 3 This is a structural diagram of Embodiment 1 of the present invention; Figure 4 This is a partial enlarged view of Embodiment 1 of this utility model; Figure 5 This is a structural diagram of Embodiment 3 of this utility model; Figure 6 This is a structural diagram of Embodiment 4 of this utility model.

[0026] Explanation of reference numerals in the attached figures: 1. Valve seat; 2. First connecting pipe; 3. Filter; 4. Pipe cap; 401. Bending part; 402. Limiting part; 5. Second connecting pipe; 6. Spinned convex ring; 7. Flared part; 8. Welding ring. Detailed Implementation

[0027] The present application will be further described in detail below with reference to the accompanying drawings.

[0028] Example 1

[0029] like Figure 1-2 As shown, this embodiment discloses a connecting pipe structure for an electronic expansion valve. The connecting pipe is installed on the valve seat 1 of the electronic expansion valve, and the inner cavity of the connecting pipe is connected to the inner cavity of the electronic expansion valve. A filter 3 is installed inside the connecting pipe, and a pipe cap 4 is installed at the end of the connecting pipe.

[0030] In this example, the cap 4 is fitted inside the opening of the connecting pipe and is fixedly connected to the connecting pipe. More specifically, the outer end of the cap 4 extends to the outside of the connecting pipe and is bent in the radial direction to form a bend 401. A welding ring 8 is provided between the bend 401 and the end of the connecting pipe to weld and fix the cap 4 to the connecting pipe. The inner end of the cap 4 is bent towards the center to form a limiting part 402. The limiting part 402 is used to make the end of the external pipe abut against the limiting part 402 when the external pipe is connected to the cap 4, thereby improving the assembly effect and efficiency.

[0031] In this example, the connecting pipe has a flared section 7 at the end of the pipe, and the pipe cap 4 is installed inside the flared section 7. The flared section 7 can be formed by stamping on the connecting pipe to improve the deformation resistance of the pipe opening.

[0032] In this example, the end of the filter 3 abuts against the end face of the cap 4. Specifically, the filter 3 abuts against the end of the cap 4 away from the pipe opening, and is fixed inside the connecting pipe by means of spinning or pressing. Figure 2 As shown, after the cap 4 and filter 3 are installed inside the connecting pipe, a spun ring 6 is formed in the circumferential direction of the connecting pipe by spinning. The inner wall of the spun ring 6 can axially limit the filter 3, and the cap 4 below is fixed to the end of the connecting pipe by welding, thereby fixing the cap 4 and filter 3 on the connecting pipe.

[0033] In this example, there are two connecting pipes, including a first connecting pipe 2 and a second connecting pipe 5. The first connecting pipe 2 is installed at the end of the valve seat 1, and the second connecting pipe 5 is installed on the circumferential side of the valve seat 1. More specifically, the first connecting pipe 2 is a straight pipe with its center line parallel to the center line of the valve seat 1; the second connecting pipe 5 is an L-shaped bend.

[0034] In this example, both the connecting pipe and the cap 4 are made of copper. It is understood that in other embodiments, the connecting pipe and the cap 4 may also be made of stainless steel or other metals.

[0035] Example 2

[0036] like Figure 3-4 As shown, the only difference between this embodiment and the above embodiment is that: in this example, one end of the filter 3 is placed inside the cap 4, and the middle step of the filter 3 abuts against the limiting part 402. The filter 3 and the cap 4 are fixedly connected. During assembly, the cap 4 and the filter 3 are assembled first, and then the two are installed into the connecting pipe as a whole, which can improve the assembly efficiency.

[0037] Example 3

[0038] like Figure 5 As shown, the only difference between this embodiment and the first embodiment above is that in this example, the first connecting pipe 2 is a straight pipe with its center line parallel to the center line of the valve seat 1, and the second connecting pipe 5 is a straight pipe with its center line perpendicular to the center line of the valve seat 1.

[0039] Example 4

[0040] like Figure 6 As shown, the only difference between this embodiment and the above embodiment 2 is that in this example, the first connecting pipe 2 is an L-shaped bend, and the second connecting pipe 5 is a straight pipe, with its center line perpendicular to the center line of the valve seat 1.

[0041] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A connection pipe structure of an electronic expansion valve, the connection pipe being mounted to a valve seat (1) of an electronic expansion valve, and a connection pipe inner cavity being communicated with an electronic expansion valve inner cavity, characterized in that, A filter (3) is installed inside the connecting pipe, and a pipe cap (4) is installed at the end of the connecting pipe.

2. The connecting pipe structure of an electronic expansion valve according to claim 1, wherein The cap (4) is fitted inside the opening of the connecting pipe and is fixedly connected to the connecting pipe.

3. The connecting pipe structure of an electronic expansion valve according to claim 2, wherein The outer end of the cap (4) extends to the outside of the connecting pipe and bends in the radial direction to form a bend (401). A welding ring (8) is provided between the bend (401) and the end of the connecting pipe to weld and fix the cap (4) to the connecting pipe. The inner end of the cap (4) bends in the center direction to form a limiting part (402).

4. The connecting pipe structure of an electronic expansion valve according to claim 1, characterized in that, The connecting pipe has a flared section (7) at the end of the pipe, and the pipe cap (4) is installed inside the flared section (7).

5. The connecting pipe structure of an electronic expansion valve according to claim 2, wherein The end of the filter (3) abuts against the end face of the cap (4), and the filter (3) is fixed inside the connecting pipe by means of spinning or pressing on the connecting pipe.

6. The connecting pipe structure of an electronic expansion valve according to claim 2, wherein One end of the filter (3) is placed inside the cap (4), and the middle step of the filter (3) abuts against the limiting part (402). The filter (3) is fixedly connected to the cap (4).

7. The connecting pipe structure of an electronic expansion valve according to claim 1, wherein There are two connecting pipes, including a first connecting pipe (2) and a second connecting pipe (5). The first connecting pipe (2) is installed at the end of the valve seat (1), and the second connecting pipe (5) is installed on the circumferential side of the valve seat (1).

8. The connecting pipe structure of an electronic expansion valve according to claim 7, wherein The first connecting pipe (2) is a straight pipe, and its center line is parallel to the center line of the valve seat (1); the second connecting pipe (5) is an L-shaped bend or a straight pipe.

9. The connecting pipe structure of an electronic expansion valve according to claim 7, wherein The first connecting pipe (2) is an L-shaped bend or a straight pipe; the second connecting pipe (5) is a straight pipe, and its center line is perpendicular to the center line of the valve seat (1).

10. The connecting pipe structure of an electronic expansion valve according to claim 7, wherein Both the connecting pipe and the cap (4) are made of copper.

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