Connecting pipe assembly and electronic expansion valve with same

Abstract

The utility model provides a connecting pipe assembly and an electronic expansion valve with the connecting pipe assembly, and the connecting pipe assembly comprises a connecting pipe which is provided with an insertion pipe and a sleeve which are communicated with each other, and one end of the insertion pipe is inserted into one end of the sleeve; the filtering device is arranged in the connecting pipe, the filtering device is provided with a filter screen and a fixing sleeve, the filter screen is fixedly connected with the fixing sleeve, an installation space is formed between the insertion pipe and the sleeve, and the fixing sleeve is arranged in the installation space so as to limit the position of the filtering device in the connecting pipe. According to the technical scheme, the problems that in the prior art, filters need to be installed at an inlet and an outlet of an electronic expansion valve, so that the manufacturing cost is increased, and the occupied space is increased can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of control valves, and more particularly to a connecting pipe assembly and an electronic expansion valve having the same. Background Art

[0002] Currently, an electronic expansion valve is usually used to regulate the flow rate of the fluid in the air-conditioning system pipeline.

[0003] In the prior art, in order to filter impurities in the system pipeline and prevent the impurities from affecting the regulation accuracy of the electronic expansion valve, filters are usually installed at both the inlet and outlet of the electronic expansion valve. However, the cost of setting up the filter separately is relatively high, and in order to connect the filter, an installation space for the filter needs to be designed separately, which affects the occupied space of the overall air-conditioning system. Summary of the Utility Model

[0004] The utility model provides a connecting pipe assembly and an electronic expansion valve having the same, so as to solve the problems in the prior art that filters need to be installed at the inlet and outlet of the electronic expansion valve, resulting in increased manufacturing costs and increased occupied space.

[0005] According to one aspect of the utility model, a connecting pipe assembly is provided. The connecting pipe assembly includes: a connecting pipe having an insertion pipe and a sleeve that communicate with each other, and one end of the insertion pipe is inserted into one end of the sleeve; a filtering device disposed in the connecting pipe, the filtering device having a filter screen and a fixing sleeve, the filter screen is fixedly connected to the fixing sleeve, and there is an installation space between the insertion pipe and the sleeve, and the fixing sleeve is disposed in the installation space to limit the position of the filtering device in the connecting pipe.

[0006] By applying the technical solution provided by the utility model, the connecting pipe is composed of an insertion pipe and a sleeve. By disposing and fixing the filtering device between the insertion pipe and the sleeve, the filtering device can filter the fluid passing through the connecting pipe, preventing impurities in the fluid from affecting the movement accuracy of the electronic expansion valve. By providing the installation space, the filtering device can be fixed, preventing the filtering device from loosening or even falling off under the impact of the fluid, and ensuring the use stability of the electronic expansion valve. By disposing the filtering device in the connecting pipe, compared with the prior art of setting finished filters at the inlet and outlet of the electronic expansion valve, the overall manufacturing cost of the air-conditioning system can be reduced. Moreover, since the filtering device is disposed inside the connecting pipe, there is no need to connect a filter on the overall air-conditioning system pipeline, which can effectively reduce the overall occupied space of the air-conditioning system and facilitate the pipeline design of the air-conditioning system.

[0007] Furthermore, a first limiting structure is provided on the inner wall of the sleeve. The first limiting structure has a gap with the end face of the insertion pipe in the extending direction of the insertion position of the insertion pipe and the sleeve, and the gap forms the installation space. With such a setting, the installation space can limit the axial displacement of the fixing sleeve and ensure the installation stability of the filtering device.

[0008] Furthermore, the sleeve has a first section and a second section that communicate with each other. The insertion tube is inserted into the second section. The first limiting structure includes a limiting surface, which is arranged between the first section and the second section, and the fixing sleeve is in limiting cooperation with the limiting surface. With such an arrangement, the limiting surface can limit the displacement of the fixing sleeve to ensure the stability of the installation of the filtering device.

[0009] Furthermore, the sleeve further includes a limiting section, which is arranged between the first section and the second section. The first section, the limiting section, and the second section are connected in sequence. The inner diameter of the limiting section gradually increases from the first section to the second section, and the inner wall of the limiting section forms the limiting surface. With such an arrangement, the limiting surface can play a role in limiting the fixing sleeve.

[0010] Furthermore, the fixing sleeve has a first straight section and a first tapered section that communicate with each other. The first straight section faces the insertion tube, and one end of the first straight section away from the first tapered section abuts against the end face of the insertion tube. The outer diameter of the first tapered section gradually decreases in the direction away from the first straight section, and the outer wall of the first tapered section abuts against the inner wall of the limiting section. With such an arrangement, the matching area between the fixing sleeve and the limiting surface can be increased, and the limiting effect can be improved.

[0011] Furthermore, the filter screen has an open end and a blocking end arranged opposite to each other. A second limiting structure is arranged between the open end and the fixing sleeve, and the second limiting structure is used to limit the axial displacement of the filter screen relative to the fixing sleeve. With such an arrangement, the filter screen can be prevented from falling off the fixing sleeve, ensuring the stability of the filtering device.

[0012] Furthermore, the fixing sleeve has a first straight section and a first tapered section that communicate with each other. The first straight section is close to the insertion tube, and the diameter of the first tapered section gradually decreases in the direction away from the first straight section. The filter screen has a second straight section and a second tapered section that communicate with each other. One end of the second straight section away from the second tapered section forms the open end, and the diameter of the second tapered section gradually decreases in the direction away from the second straight section. The outer wall of the second tapered section is in limiting cooperation with the inner wall of the first tapered section. With such an arrangement, the displacement of the filter screen in the direction away from the insertion tube can be restricted by the cooperation of the first tapered section and the second tapered section.

[0013] Furthermore, the sleeve has a first section and a second section that communicate with each other. The sleeve further includes a limiting section, which is arranged between the first section and the second section. The slopes of the second tapered section, the first tapered section, and the limiting section are all equal. With such an arrangement, the displacement of the fixing sleeve in the radial direction can be restricted, preventing disturbance between the fixing sleeve and the filter screen and reducing noise.

[0014] Furthermore, the second limiting structure includes a limiting groove. One end of the fixing sleeve facing the insertion tube is bent inward to form the limiting groove, and the open end is inserted into the limiting groove. With such an arrangement, the displacement of the filter screen in the direction close to the insertion tube can be restricted.

[0015] Furthermore, the connecting pipe assembly is also provided with a welding ring, which is sleeved on the cannula and arranged at the connection between the sleeve and the cannula. Such arrangement can improve the connection strength between the cannula and the sleeve and improve the sealing performance of the connecting pipe.

[0016] Furthermore, the cannula is made of copper and the sleeve is made of stainless steel, and / or the cannula is made of stainless steel and the sleeve is made of copper. This arrangement allows for selection of materials for the cannula and sleeve based on the different connection directions of the connecting pipe assembly in the system pipeline, thereby facilitating the processing and forming of the connecting pipe assembly.

[0017] According to another aspect of the present invention, an electronic expansion valve is provided, comprising the aforementioned pipe assembly, and further comprising: a valve seat component having a valve port and a communication cavity interconnected; and a communication port disposed on the valve seat component, the communication port communicating with the communication cavity, the communication port being configured to communicate with the pipe assembly. By disposing the pipe assembly provided herein at the communication port, a filtering device can filter fluid passing through the communication cavity and the valve port, preventing impurities in the fluid from affecting the effectiveness of the valve port when cooperating with other units, thereby ensuring the accuracy of the electronic expansion valve in controlling flow, and also preventing impurities from being deposited in the communication cavity, thereby reducing the number of maintenance times required for the electronic expansion valve and increasing the service life of the electronic expansion valve.

[0018] Furthermore, the effective filtration area of the filter is greater than or equal to the flow area at the valve port. Through the above arrangement, the flow efficiency of the fluid passing through the electronic expansion valve can be guaranteed when the electronic expansion valve is in full open mode, and the filter assembly can be prevented from throttling the fluid.

[0019] Furthermore, the filter needs to meet the following requirements: Among them, the area of the part of the filter that actually plays a filtering role is S, the mesh number of the filter is n, the wire diameter of the filter is r, and the diameter of the valve port is d. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0021] Figure 1 It shows a structural schematic diagram of the connecting pipe assembly provided by the first embodiment of the present utility model;

[0022] Figure 2 Shown Figure 1 A partial enlarged view of point A in the middle;

[0023] Figure 3 Shows a schematic structural diagram of the filtering device provided by the utility model;

[0024] Figure 4 It shows a structural schematic diagram of a connecting pipe assembly provided by a second embodiment of the present utility model;

[0025] Figure 5 Shown Figure 4 A partial enlarged view of point B in the middle;

[0026] Figure 6 It shows a schematic structural diagram of the pipe assembly and the valve seat after being assembled according to the first embodiment of the present utility model;

[0027] Figure 7 The figure shows a schematic structural diagram of the assembled connecting pipe assembly and valve seat provided by the second embodiment of the present invention.

[0028] The above drawings include the following reference numerals:

[0029] 10. Connecting pipe;

[0030] 11. Intubation;

[0031] 12. Casing; 121. First section; 122. Second section; 123. Limiting section;

[0032] 20. Filter device; 201. Open end; 202. Blocking end;

[0033] 21. filter screen; 211. second straight segment; 212. second tapered segment;

[0034] 22. Fixed sleeve; 221. First straight segment; 222. First tapered segment;

[0035] 30. Welding ring;

[0036] 100. Valve seat components;

[0037] 101. Valve port; 102. Communication cavity; 103. Communication port. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] like Figure 1 and Figure 4As shown in the figure, an embodiment of the present utility model provides a connecting pipe assembly, which includes a connecting pipe 10 and a filtering device 20. Among them, the connecting pipe 10 has an insertion pipe 11 and a sleeve 12 that are interconnected, and one end of the insertion pipe 11 is inserted into one end of the sleeve 12. The filtering device 20 is arranged inside the connecting pipe 10. The filtering device 20 has a filter screen 21 and a fixing sleeve 22. The filter screen 21 is fixedly connected to the fixing sleeve 22. There is an installation space between the insertion pipe 11 and the sleeve 12, and the fixing sleeve 22 is arranged in the installation space to limit the position of the filtering device 20 inside the connecting pipe 10.

[0040] Applying the technical solution provided by the present utility model, the connecting pipe 10 is composed of the insertion pipe 11 and the sleeve 12. By arranging and fixing the filtering device 20 between the insertion pipe 11 and the sleeve 12, the filtering device 20 can filter the fluid passing through the connecting pipe 10, preventing impurities in the fluid from affecting the movement accuracy of the electronic expansion valve. By providing the installation space, the filtering device 20 can be fixed, preventing the filtering device 20 from loosening or even falling off under the impact of the fluid, and ensuring the use stability of the electronic expansion valve. By arranging the filtering device 20 inside the connecting pipe 10, compared with the prior art of setting a finished filter at the inlet and outlet of the electronic expansion valve, the overall manufacturing cost of the air-conditioning system can be reduced. Moreover, since the filtering device 20 is arranged inside the connecting pipe 10, there is no need to connect a filter on the overall air-conditioning system pipeline, which can effectively reduce the overall occupied space of the air-conditioning system and facilitate the pipeline design of the air-conditioning system.

[0041] Specifically in this application, a first limiting structure is arranged on the inner wall of the sleeve 12. The first limiting structure and the end face of the insertion pipe 11 inserted into the sleeve 12 have a gap in the extending direction of the insertion position of the insertion pipe 11 and the sleeve 12, and the gap forms an installation space. Through the above arrangement, the first limiting structure and the insertion pipe 11 can cooperate in the extending direction of the insertion position of the insertion pipe 11 and the sleeve 12 to limit the displacement of the fixing sleeve 22 in this extending direction, thereby preventing the filtering device 20 from displacing relative to the first limiting structure and the insertion pipe 11 in the extending direction of the insertion position of the insertion pipe 11 and the sleeve 12, and ensuring the stability of the filtering device 20 installed inside the connecting pipe 10.

[0042] In some embodiments of this application, the first limiting structure can be set as a fixed protrusion. The fixed protrusion is formed by stamping the side wall of the sleeve 12. The fixed protrusion and the insertion pipe 11 are respectively arranged at both ends of the fixing sleeve 22 to limit the axial displacement of the filtering device 20.

[0043] In still other embodiments of the present application, the sleeve 12 has a first section 121 and a second section 122 that communicate with each other. The intubation tube 11 is inserted into the second section 122. The first limiting structure includes a limiting surface, which is disposed between the first section 121 and the second section 122, and the fixing sleeve 22 is in limiting cooperation with the limiting surface. Through the above arrangement, the limiting surface can limit the displacement of the fixing sleeve 22 in the direction away from the intubation tube 11. By cooperating with the intubation tube 11, the limiting surface can limit the displacement of the fixing sleeve 22 in the extending direction at the insertion position of the intubation tube 11 and the sleeve 12, ensuring the stability of the installation of the filtering device 20 in the connecting tube 10.

[0044] Referring to Figure 2 and Figure 5 Specifically, the sleeve 12 further includes a limiting section 123, which is disposed between the first section 121 and the second section 122. The first section 121, the limiting section 123, and the second section 122 are sequentially communicated. The inner diameter of the limiting section 123 gradually increases from the first section 121 to the second section 122, and the inner wall of the limiting section 123 forms the limiting surface. Through the above arrangement, the limiting surface of the limiting section 123 can abut against the fixing sleeve 22 to limit the displacement of the fixing sleeve 22 in the direction away from the intubation tube 11, preventing the fixing sleeve 22 from falling off under the impact of the fluid. Moreover, the limiting section 123 can be directly formed by a flaring process, which is convenient for the processing of the connecting tube 10.

[0045] Furthermore, the fixing sleeve 22 has a first straight section 221 and a first tapered section 222 that communicate with each other. The first straight section 221 faces the intubation tube 11, and one end of the first straight section 221 away from the first tapered section 222 abuts against the end face of the intubation tube 11. The outer diameter of the first tapered section 222 gradually decreases in the direction away from the first straight section 221, and the outer wall of the first tapered section 222 abuts against the inner wall of the limiting section 123. Through the above arrangement, the first tapered section 222 cooperates with the limiting surface, which can increase the cooperation area between the fixing sleeve 22 and the limiting surface, thereby improving the limiting effect of the limiting surface on the fixing sleeve 22, further preventing the fixing sleeve 22 from radially shaking under the impact of the fluid and disengaging from the limiting surface, and further ensuring the limiting effect of the limiting surface.

[0046] In other embodiments of the present application, it can be set that the diameter of the first section 121 is larger than the diameter of the second section 122. The intubation tube 11 is inserted into the first section 121 or the second section 122. A stepped surface can be formed between the first section 121 and the second section 122. The stepped surface forms the first limiting structure. A flanging structure is provided on the fixing sleeve 22, and the flanging structure is clamped between the stepped surface and the end face of the intubation tube 11 to axially limit the fixing sleeve 22 through the stepped surface and the intubation tube 11.

[0047] Specifically, referring to Figure 3As shown, the filter screen 21 has an open end 201 and a blocking end 202 which are oppositely arranged. A second limiting structure is arranged between the open end 201 and the fixing sleeve 22, and the second limiting structure is used to limit the axial displacement of the filter screen 21 relative to the fixing sleeve 22. Through the above arrangement, the second limiting structure can prevent the filter screen 21 from separating from the fixing sleeve 22 under the impact of the refrigerant fluid, ensure the connection strength between the fixing sleeve 22 and the filter screen 21, and further ensure the structural stability of the filtering device 20, so that the filtering device 20 can stably filter the refrigerant fluid.

[0048] Specifically, the fixing sleeve 22 has a first straight section 221 and a first tapered section 222 which are in communication with each other. The first straight section 221 is arranged close to the insertion tube 11. The diameter of the first tapered section 222 gradually decreases in the direction away from the first straight section 221. The filter screen 21 has a second straight section 211 and a second tapered section 212 which are in communication with each other. One end of the second straight section 211 away from the second tapered section 212 forms the open end 201. The diameter of the second tapered section 212 gradually decreases in the direction away from the second straight section 211. The outer wall of the second tapered section 212 is in limiting fit with the inner wall of the first tapered section 222. Through the above arrangement, the cooperation between the first tapered section 222 and the second tapered section 212 can play an axial limiting role on the filter screen 21. The first tapered section 222 is sleeved outside the second tapered section 212, and the end with a larger diameter of the second tapered section 212 cannot pass through the end with a smaller diameter of the first tapered section 222. In this way, it can prevent the filter screen 21 from falling off in the direction away from the insertion tube 11 under the impact of the refrigerant fluid, and ensure the filtering effect of the filtering device 20. In other embodiments of the present application, a limiting structure such as a stepped section can also be arranged between the filter screen 21 and the fixing sleeve 22, as long as the limiting effect on the filter screen 21 can be achieved.

[0049] In a specific embodiment of the present application, the slopes of the second tapered section 212, the first tapered section 222 and the limiting section 123 are all equal. Through the above arrangement, it can further ensure the matching area between the first tapered section 222 and the limiting section 123, reduce the radial disturbance of the fluid to the fixing sleeve 22, ensure the installation stability of the fixing sleeve 22, and at the same time limit the relative radial displacement between the filter screen 21 and the fixing sleeve 22, prevent the filter screen 21 from separating from the fixing sleeve 22, or prevent the filter screen 21 from colliding with the sleeve 12 under the disturbance of the fluid, reduce the mechanical noise when the fluid flows through the filtering device 20, and improve the user experience.

[0050] Furthermore, the second limiting structure includes a limiting groove. One end of the fixing sleeve 22 facing the insertion tube 11 is bent inwardly towards the inside of the fixing sleeve 22 to form the limiting groove, and the open end 201 is inserted into the limiting groove. The limiting groove can axially limit the filter screen 21. When the flow direction of the refrigerant fluid is from the sleeve 12 to the insertion tube 11, the limiting groove can prevent the filter screen 21 from falling off in the direction of the insertion tube 11, ensuring the filtering effect of the filtering device 20.

[0051] In the present application, a welding ring 30 is further provided on the connecting pipe assembly. The welding ring 30 is sleeved on the insertion tube 11 and is arranged at the connection between the sleeve 12 and the insertion tube 11. Through the above arrangement, when welding work is carried out, the welding ring 30 melts to fill the gap between the insertion tube 11 and the sleeve 12, ensuring the sealing performance between the insertion tube 11 and the sleeve 12. At the same time, it can also improve the stability of the welded connection between the insertion tube 11 and the sleeve 12, thereby ensuring the stability of the filtering device 20 installed between the insertion tube 11 and the sleeve 12.

[0052] According to an embodiment of the present application, an electronic expansion valve is further provided. The electronic expansion valve includes the above-mentioned connecting pipe assembly, and the electronic expansion valve further includes a valve seat member 100 and a communication port 103. Among them, the valve seat member 100 has a valve port 101 and a communication cavity 102 that communicate with each other. The communication port 103 is arranged on the valve seat member 100, and the communication port 103 communicates with the communication cavity 102. The communication port 103 is used to communicate with the connecting pipe assembly.

[0053] By arranging the connecting pipe assembly provided in the present application at the communication port 103, the filtering device 20 can filter the fluid passing through the communication cavity 102 and the valve port 101, preventing impurities in the fluid from affecting the cooperation effect between the valve port 101 and other units, ensuring the accuracy of the electronic expansion valve in controlling the flow rate. At the same time, it can also prevent impurities from depositing in the communication cavity 102, reducing the maintenance frequency of the electronic expansion valve and improving the service life of the electronic expansion valve. Compared with the prior art where a finished filter is provided at the inlet and outlet of the electronic expansion valve, the overall manufacturing cost of the air-conditioning system can be reduced. Moreover, since the filtering device 20 is arranged inside the connecting pipe 10, there is no need to connect a filter on the overall air-conditioning system pipeline, which can effectively reduce the overall occupied space of the air-conditioning system and facilitate the pipeline design of the air-conditioning system.

[0054] Specifically in the present application, the effective filtration area of the filter screen 21 is greater than or equal to the flow area at the valve port 101. Through the above arrangement, it is possible to prevent the filter screen 21 from throttling the fluid, thereby ensuring the flow efficiency of the fluid passing through the electronic expansion valve in the fully open mode. The effective filtration area of the filter screen 21 is the flow area corresponding to the part of the filter screen 21 that actually plays a filtering role. Specifically, it is the flow area of the filter screen 21 excluding the part that cooperates with the fixing sleeve 22, that is, the area of the filter screen 21 excluding the part that cannot allow the fluid to flow due to cooperation with the first straight section 221 and the first tapered section 222.

[0055] In the present application, the area of the part of the filter screen that actually plays a filtering role is S. Specifically, the area of the filter screen 21 excluding the part that cooperates with the fixing sleeve 22 is S, and the mesh number of the filter screen 21 is n, then the number of holes of the filter screen 21 The filter hole area of the filter screen 21 is S r Then the effective filtration area of the filter screen 21 excluding the part that cooperates with the fixing sleeve 22 is S1, The diameter of the valve port 101 is d. In the present application, it is necessary to make the effective filtration area of the filter screen 21 greater than or equal to the flow area at the valve port 101 to prevent the filter screen 21 from throttling the fluid, and it is necessary to satisfy That is, it is necessary to satisfy

[0056] Specifically, the shape of the filter holes of the filter screen 21 can be square, circular, diamond-shaped or other shapes.

[0057] In a specific embodiment of the present application, when the filter holes of the filter screen 21 are square, the aperture of the filter screen 21 where r is the wire diameter of the filter screen 21, and the effective filtration area of the filter screen 21 excluding the part that cooperates with the fixing sleeve 22 To prevent the filter screen 21 from throttling the fluid, it is necessary to satisfy That is, it is necessary to satisfy

[0058] Refer to Figure 6 As shown, in the first embodiment of the present application, two communication ports 103 for fluid flow are provided on the valve seat member 100. In this embodiment, the sleeve 12 is provided at the communication port 103 for connecting with the valve seat member 100, and the insertion tube 11 is used for connecting with the system pipeline. The open end 201 of the filter screen 21 faces the system pipeline. Specifically, in this embodiment, the sleeve 12 connected to the valve seat member 100 is made of stainless steel material, and the insertion tube 11 connected to the system pipeline is made of copper material.

[0059] Refer to Figure 7As shown, in the second embodiment of the present application, two communication ports 103 are provided on the valve seat member 100 for the flow of fluid. Different from the first embodiment, in this embodiment, the insertion tube 11 is arranged at the communication port 103 for connecting with the valve seat member 100, and the sleeve 12 is used for connecting with the system pipeline. The open end 201 of the filter screen 21 faces away from the system pipeline. The insertion tube 11 connected to the valve seat member 100 is made of stainless steel material, and the sleeve 12 connected to the system pipeline is made of red copper material. Through the first and second embodiments provided by the present application, the orientation of the filter screen 21 can be selected according to the different flow directions of the fluid in the system pipeline, so as to facilitate the reverse flushing of the filtering device 20 and the maintenance of the filtering device 20.

[0060] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0061] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the said technologies, methods, and devices should be regarded as part of the specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0062] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom" are generally based on the orientation or positional relationships shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the protection scope of the present invention; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0063] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper" etc. may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as shown in the figures. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, a device described as "above" or "over" other devices or structures will then be positioned "below" or "under" the other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations for the spatial relative descriptions used herein will be made accordingly.

[0064] In addition, it should be noted that the use of terms such as "first", "second" etc. to define components is only for the convenience of differentiating the corresponding components. Without additional statements, the above terms have no special meanings, and thus should not be construed as limiting the protection scope of the present utility model.

[0065] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A takeover component, characterized in that, The takeover assembly includes: The connecting pipe (10) comprises a cannula (11) and a sleeve (12) which are in communication with each other, wherein one end of the cannula (11) is inserted into one end of the sleeve (12); A filter device (20) is arranged in the connecting pipe (10), the filter device (20) comprises a filter screen (21) and a fixing sleeve (22), the filter screen (21) and the fixing sleeve (22) are fixedly connected, an installation space is provided between the inserting pipe (11) and the sleeve (12), and the fixing sleeve (22) is arranged in the installation space to limit the position of the filter device (20) in the connecting pipe (10).

2. The takeover assembly according to claim 1, characterized in that, A first limiting structure is provided on the inner wall of the sleeve (12), and a gap is formed between the first limiting structure and the end face of the inserting tube (11) in the extension direction of the insertion position of the inserting tube (11) and the sleeve (12), and the gap forms the installation space.

3. The take-over component according to claim 2, characterized in that, The sleeve (12) has a first section (121) and a second section (122) that are interconnected, the cannula (11) is inserted into the second section (122), the first limiting structure includes a limiting surface, the limiting surface is arranged between the first section (121) and the second section (122), and the fixing sleeve (22) is in limiting cooperation with the limiting surface.

4. The take-over component according to claim 3, characterized in that, The sleeve (12) further includes a limiting section (123), which is arranged between the first section (121) and the second section (122). The first section (121), the limiting section (123) and the second section (122) are connected in sequence. The inner diameter of the limiting section (123) gradually increases from the first section (121) to the second section (122), and the inner wall of the limiting section (123) forms the limiting surface.

5. The takeover component according to claim 4, characterized in that, The fixing sleeve (22) has a first straight section (221) and a first tapered section (222) that are connected to each other. The first straight section (221) is arranged toward the cannula (11). An end of the first straight section (221) away from the first tapered section (222) abuts against the end face of the cannula (11). The outer diameter of the first tapered section (222) gradually decreases in a direction away from the first straight section (221). The outer wall of the first tapered section (222) abuts against the inner wall of the limiting section (123).

6. The takeover component according to claim 1, characterized in that, The filter screen (21) has an open end (201) and a blocking end (202) arranged opposite to each other, and a second limiting structure is provided between the open end (201) and the fixing sleeve (22), and the second limiting structure is used to limit the axial displacement of the filter screen (21) relative to the fixing sleeve (22).

7. The take-over component according to claim 6, characterized in that, The fixing sleeve (22) has a first straight section (221) and a first tapered section (222) that are interconnected. The first straight section (221) is arranged close to the cannula (11). The diameter of the first tapered section (222) gradually decreases in a direction away from the first straight section (221). The filter screen (21) has a second straight section (211) and a second tapered section (212) that are interconnected. The end of the second straight section (211) away from the second tapered section (212) forms the open end (201). The diameter of the second tapered section (212) gradually decreases in a direction away from the second straight section (211). The outer wall of the second tapered section (212) is limitedly matched with the inner wall of the first tapered section (222).

8. The takeover assembly according to claim 7, characterized in that, The sleeve (12) has a first section (121) and a second section (122) that are interconnected. The sleeve (12) further includes a limiting section (123). The limiting section (123) is arranged between the first section (121) and the second section (122). The second conical section (212), the first conical section (222) and the limiting section (123) have the same inclination.

9. The takeover component according to claim 7, characterized in that, The second limiting structure comprises a limiting groove, and one end of the fixing sleeve (22) facing the insertion tube (11) is bent toward the inner side of the fixing sleeve (22) to form the limiting groove, and the opening end (201) is inserted into the limiting groove.

10. The take-over component according to claim 1, characterized in that, The connecting pipe assembly is further provided with a welding ring (30), which is sleeved on the inserting pipe (11) and is arranged at the connection between the sleeve (12) and the inserting pipe (11).

11. The pipe assembly according to claim 1, characterized in that: The cannula (11) is made of copper, the sleeve (12) is made of stainless steel, and / or The insert tube (11) is made of stainless steel, and the sleeve (12) is made of copper.

12. An electronic expansion valve, characterized in that, The electronic expansion valve comprises the connecting pipe assembly according to any one of claims 1 to 11, and further comprises: A valve seat component (100), the valve seat component (100) having a valve port (101) and a communication cavity (102) that are communicated with each other; A communication port (103), wherein the communication port (103) is provided on the valve seat component (100), the communication port (103) is communicated with the communication cavity (102), and the communication port (103) is used to communicate with the connecting pipe assembly.

13. The electronic expansion valve according to claim 12, wherein, The effective filtering area of the filter screen (21) is greater than or equal to the flow area at the valve port (101).

14. The electronic expansion valve according to claim 13, characterized in that, The filter (21) needs to meet the following requirements: The area of the part of the filter screen (21) that actually performs the filtering function is S, the mesh number of the filter screen (21) is n, the wire diameter of the filter screen (21) is r, and the diameter of the valve port (101) is d.

Images