Electronic expansion valve

Abstract

The utility model relates to the technical field of refrigeration control, in particular to an electronic expansion valve for freezing and cold storage equipment, which comprises a stator and a valve body component, the stator is sleeved on the upper portion of the valve body component, the valve body component is provided with an inlet pipe and an outlet pipe, and an impurity filtering mechanism is connected onto the inlet pipe and comprises a machine body and a filtering piece. The machine body is connected with the inlet pipe, and the filtering piece is inserted into the machine body and detachably connected with the machine body. According to the electronic expansion valve, before entering the valve body part, a refrigerant firstly enters the machine body, is filtered by the filter part and then enters the valve body part through the inlet pipe, dirt is intercepted in the filter part, and when the refrigerating effect of a refrigerating system becomes poor due to the fact that the filter part is blocked, the filter part is detached to be cleaned or replaced with a new filter part, so that the filter part is replaced with the filter part. The refrigeration effect of the refrigeration system can be recovered as early as possible; therefore, the scheme is simple and easy to repair and maintain, and meanwhile, the cost can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration control, in particular to an electronic expansion valve for freezing and refrigeration equipment. Background Art

[0002] In refrigeration systems such as freezers and refrigerators, electronic expansion valves are used to adjust the flow of refrigerant. Installed between the condenser and evaporator in a refrigeration system, the electronic expansion valve throttles and reduces the pressure of the liquid refrigerant from the condenser. It also automatically adjusts the flow of refrigerant from the condenser to the evaporator based on the evaporator outlet temperature to meet the changing needs of the cooling load.

[0003] Because freezing and refrigeration systems are more complex than air conditioning systems, current technology typically requires a fixed filter installed at the inlet pipe end of the electronic expansion valve to prevent impurities, garbage, and scale from entering the piping system, potentially blocking the valve or jamming the valve's screw mechanism, causing malfunction. However, due to the small size of the inlet pipe, the fixed filter's capacity is limited. Consequently, after several years of operation, the filter at the inlet end of the electronic expansion valve can become severely clogged with impurities, causing the refrigeration system to fail. Repairs require the electronic expansion valve to be removed and replaced entirely, resulting in complex and costly repairs. Utility Model Content

[0004] The technical problem to be solved by the present invention is: in order to solve the technical problems in the prior art, the present invention provides an electronic expansion valve, which has the function of cleaning or replacing the filter when the filter in the valve inlet pipe is blocked and the electronic expansion valve cannot work normally, and is easy and simple to maintain.

[0005] The technical solution adopted by the utility model to solve its technical problems is: an electronic expansion valve, including a stator and a valve body component, the stator is sleeved on the upper part of the valve body component, the valve body component has an inlet pipe and an outlet pipe, the inlet pipe is connected to an impurity filtering mechanism, the impurity filtering mechanism includes a body and a filter element, the body is connected to the inlet pipe, and the filter element is inserted into the body and is detachably connected to the body.

[0006] The utility model relates to an electronic expansion valve. Before the refrigerant enters the valve body, it first enters the machine body, is filtered by the filter element, and then enters the valve body through the inlet pipe. Impurities are trapped in the filter element. When the filter element is clogged and the refrigeration effect of the refrigeration system deteriorates, the filter element can be removed for cleaning or replaced with a new one to restore the refrigeration effect of the refrigeration system. In addition, even if the machine body and the filter element are damaged as a whole, it is only necessary to remove the machine body from the inlet pipe and replace the impurity filtering mechanism with a new one without replacing the electronic expansion valve itself. Therefore, the present solution is simple and easy to repair and maintain, and can also reduce costs.

[0007] Furthermore, the impurity filtering mechanism further includes an entry portion and a connecting portion, wherein the connecting portion is connected to the inlet pipe, the entry portion is coaxially arranged with the filter element, and the connecting portion is arranged perpendicular to the entry portion and the filter element.

[0008] Furthermore, the filter element includes a mesh seat and a filter screen. The mesh seat is detachably connected to the body. A connection point is provided at the end of the mesh seat. The filter screen is barrel-shaped. One end of the filter screen is connected to the connection point of the mesh seat.

[0009] Furthermore, one end of the filter screen is connected to the screen seat by riveting or welding.

[0010] Furthermore, one end of the filter screen away from the screen seat is connected to a fitting portion, and the outer wall of the fitting portion fits with the side wall of the inner hole of the body.

[0011] Furthermore, the machine body is provided with an internal thread, and the mesh seat is provided with an external thread for screwing with the internal thread.

[0012] Furthermore, the entry portion is a circular tube, a first cylindrical hole is provided on the machine body, and the entry portion is inserted into the first cylindrical hole on the machine body and is welded to the machine body.

[0013] Furthermore, the air inlet pipe on the valve body component is inserted into the second cylindrical hole of the connecting portion and is welded to the connecting portion.

[0014] Furthermore, the body is made of brass material after hot forging and fine processing.

[0015] Furthermore, the mesh size of the filter is 60-100 meshes.

[0016] The beneficial effects of the present utility model are:

[0017] 1. Before entering the valve body, the refrigerant first enters the body through the inlet part, is filtered by the filter, and then enters the valve body through the connection part and the inlet pipe. The impurities are trapped in the filter. When the filter is clogged and the cooling effect of the refrigeration system deteriorates, the stop valves at both ends of the electronic expansion valve are closed and the mesh seat is unscrewed to clean the filter or replace the mesh seat and filter with a new one, thereby restoring the cooling effect of the refrigeration system. In addition, even if the body and filter are damaged as a whole, it is only necessary to remove the body from the inlet pipe and replace the impurity filtering mechanism with a new one, without replacing the electronic expansion valve itself. Therefore, this solution is simple and easy to repair and maintain, and can also reduce costs.

[0018] 2. The connection part is perpendicular to the inlet part and the filter element, so that the impurity filtering mechanism is in a "T" shape as a whole, which can meet the filtering needs while facilitating the installation and removal of the filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 It is a schematic diagram of the overall structure of an electronic expansion valve in the present utility model.

[0021] Figure 2 It is a schematic cross-sectional view of the impurity filtering mechanism in the present invention.

[0022] Figure 3 It is a structural diagram of the filter element in the present invention.

[0023] Figure 4 It is a front view schematic diagram of the filter element in the present invention.

[0024] Figure 5 It is a schematic diagram of the cross-section structure of the filter element in the present invention.

[0025] Figure 6 It is a structural diagram of the machine body in the utility model.

[0026] Figure 7 It is a schematic diagram of the cutaway structure of the machine body in the present invention.

[0027] In the figure: 1. stator; 2. valve body component; 21. inlet pipe; 22. outlet pipe; 3. impurity filtering mechanism; 31. entry part; 32. connecting part; 321. second cylindrical hole; 33. filter element; 331. mesh seat; 3311. external thread; 332. filter screen; 3321. fitting part; 34. body; 341. internal thread; 342. first cylindrical hole. DETAILED DESCRIPTION

[0028] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more. In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0030] The utility model discloses an electronic expansion valve.

[0031] Reference Figure 1 and Figure 2 An electronic expansion valve includes a stator 1 and a valve body component 2. The stator 1 is mounted on the upper part of the valve body component 2. The valve body component 2 has an inlet pipe 21 and an outlet pipe 22. The inlet pipe 21 is connected to an impurity filtering mechanism 3.

[0032] Specifically, the impurity filtering mechanism 3 includes a body 34, an inlet portion 31 connected to the body 34, a filter element 33, and a connecting portion 32. The connecting portion 32 is connected to the inlet pipe 21. The inlet portion 31 and the filter element 33 are coaxially arranged. The filter element 33 is inserted into the inner hole of the body 34. The connecting portion 32 is arranged perpendicular to the inlet portion 31 and the filter element 33, forming a "T" shape. The medium enters the body 34 through the liquid inlet pipe, is filtered by the filter element 33, and then flows into the inlet pipe 21 through the connecting portion 32, and then enters the valve body 2.

[0033] Reference Figures 3 to 5The filter element 33 includes a mesh base 331 and a filter screen 332. The mesh base 331 is detachably connected to the housing 34. The housing 34 is provided with an internal thread 341, and the mesh base 331 is provided with an external thread 3311 that engages with the internal thread 341, thereby facilitating the connection between the mesh base 331 and the housing 34. A connection is provided at one end of the mesh base 331. The filter screen 332 is cylindrical in shape, and one end of the filter screen 332 is connected to the connection at the mesh base 331. The connection between the filter screen 332 and the mesh base 331 can be riveted or welded, as long as the connection between the filter screen 332 and the mesh base 331 is secure. The end of the filter screen 332 away from the mesh base 331 is connected to a fitting portion 3321. The outer wall of the fitting portion 3321 fits against the inner wall of the housing 34 to reduce the possibility of refrigerant directly passing between the filter screen 332 and the inner wall of the housing 34.

[0034] Reference Figure 6 and Figure 7 The inlet portion 31 is a circular tube. The body 34 is provided with a first cylindrical hole 342. The inlet portion 31 is inserted into the first cylindrical hole 342 of the body 34 and is welded to the body 34. The connecting portion 32 is provided with a second cylindrical hole 321. The air inlet pipe on the valve body component 2 is inserted into the second cylindrical hole 321 of the connecting portion 32 and is welded to the connecting portion 32.

[0035] It should be noted that the body 34 is made of brass material after hot forging and fine processing. The mesh of the filter 332 is 60 mesh to 100 mesh, which can be 60 mesh, 80 mesh, or 100 mesh.

[0036] Working principle: Before the refrigerant enters the valve body component 2, it first enters the body 34 through the inlet part 31, is filtered by the filter 332, and then enters the valve body component 2 through the connecting part 32 and the inlet pipe 21. The dirt is trapped in the filter 332. When the filter 332 is blocked and the refrigeration effect of the refrigeration system becomes worse, close the stop valves at both ends of the electronic expansion valve, unscrew the mesh seat 331, clean the filter 332 or replace the mesh seat 331 and the filter 332 with a new one, thereby restoring the refrigeration effect of the refrigeration system. In addition, even if the body 34 and the filter element 33 are damaged as a whole, it is only necessary to remove the body 34 from the inlet pipe 21 and replace the new impurity filtering mechanism 3 without replacing the electronic expansion valve itself. Therefore, this solution is simple and easy to repair and maintain, and can also reduce costs.

[0037] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. An electronic expansion valve, comprising a stator (1) and a valve body component (2), wherein the stator (1) is mounted on the upper portion of the valve body component (2), and the valve body component (2) has an inlet pipe (21) and an outlet pipe (22), characterized in that: The inlet pipe (21) is connected to an impurity filtering mechanism (3), and the impurity filtering mechanism (3) comprises a body (34) and a filter element (33). The body (34) is connected to the inlet pipe (21), and the filter element (33) is inserted into the body (34) and is detachably connected to the body (34).

2. The electronic expansion valve according to claim 1, characterized in that: The impurity filtering mechanism (3) further comprises an inlet portion (31) and a connecting portion (32), wherein the connecting portion (32) is connected to the inlet pipe (21), the inlet portion (31) and the filter element (33) are coaxially arranged, and the connecting portion (32) is perpendicular to the inlet portion (31) and the filter element (33).

3. The electronic expansion valve according to claim 2, characterized in that: The filter element (33) comprises a mesh seat (331) and a filter screen (332); the mesh seat (331) is detachably connected to the body (34); a connection point is provided at the end of the mesh seat (331); the filter screen (332) is cylindrical; one end of the filter screen (332) is connected to the connection point of the mesh seat (331).

4. The electronic expansion valve according to claim 3, characterized in that: One end of the filter screen (332) is connected to the screen seat (331) by riveting or welding.

5. The electronic expansion valve according to claim 3, characterized in that: One end of the filter screen (332) away from the screen seat (331) is connected to a fitting portion (3321), and the outer wall of the fitting portion (3321) fits with the side wall of the inner hole of the body (34).

6. An electronic expansion valve as claimed in claim 3, characterized in that: The machine body (34) is provided with an internal thread (341), and the mesh seat (331) is provided with an external thread (3311) for screwing with the internal thread (341).

7. An electronic expansion valve according to claim 6, characterized in that: The entry portion (31) is a circular tube, and a first cylindrical hole (342) is provided on the machine body (34). The entry portion (31) is inserted into the first cylindrical hole (342) on the machine body (34) and is welded to the machine body (34).

8. An electronic expansion valve according to claim 7, characterized in that: A second cylindrical hole (321) is provided in the connecting portion (32), and the air intake pipe on the valve body component (2) is inserted into the second cylindrical hole (321) of the connecting portion (32) and is welded to the connecting portion (32).

9. The electronic expansion valve according to claim 2, characterized in that: The machine body (34) is made of brass material through hot forging and fine machining.

10. The electronic expansion valve according to claim 3, characterized in that: The mesh size of the filter screen (332) is 60-100 meshes.

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