Electric valve

Abstract

The utility model provides an electric valve which comprises a valve body and a valve seat, the valve seat is provided with an installation hole, the valve body is installed in the installation hole, and the outer wall of the valve body and the inner wall of the installation hole form a first step matching structure. The first step matching structure comprises an annular protrusion, and the valve body corresponding to the first step matching structure is in sealing fit with the valve seat through the annular protrusion. A fixed connecting structure and a sealing ring which are arranged at intervals in the axial direction are further arranged between the outer wall of the valve body and the inner wall of the mounting hole, and the first step matching structure is located between the fixed connecting structure and the sealing ring. According to the scheme, the annular protrusion is arranged on the first step matching structure, the annular protrusion separates the fixed connecting structure between the outer wall of the valve body and the inner wall of the mounting hole and the sealing ring, and therefore chippings generated in the fixing and assembling process of the valve body and the valve seat can be effectively prevented from entering the position where the sealing ring is located under the action of gravity or airflow; the sealing effect of the sealing ring is affected, and leakage is avoided.

Description

[0001] This application claims priority to a patent application filed with the State Intellectual Property Office of China on July 19, 2024, with application number 2024217243777 and title “Electric Valve”. Technical Field

[0002] The utility model relates to the technical field of valves, in particular to an electric valve. Background Art

[0003] Electric valves, such as solenoid valves, consist of a connected valve body and valve seat. The valve body is positioned within the mounting hole of the valve seat, and an O-ring is positioned between the valve body and the inner wall of the valve seat within the mounting hole to prevent refrigerant leakage. In some electric valves, the valve body and valve seat are connected by a fixed connection structure. However, debris and impurities generated during the fixed assembly of the valve body and valve seat can enter the mounting cavity of the O-ring, affecting its sealing performance. Utility Model Content

[0004] The purpose of the utility model is to prevent debris and impurities from entering the installation cavity where the sealing ring is located, thereby ensuring the sealing performance of the sealing ring between the valve body and the valve seat.

[0005] To achieve the above objectives, the following scheme is adopted:

[0006] An electric valve comprises a valve body and a valve seat, wherein the valve seat has a mounting hole, the valve body is mounted in the mounting hole, and the outer wall of the valve body and the inner wall of the mounting hole form a first step matching structure; wherein,

[0007] The first step matching structure includes an annular protrusion. The valve body corresponding to the first step matching structure is sealed with the valve seat through the annular protrusion. There is also a fixed connection structure and a sealing ring arranged along the axial direction between the outer wall of the valve body and the inner wall of the mounting hole. The first step matching structure is located between the fixed connection structure and the sealing ring.

[0008] Furthermore, the first step matching structure includes a first outer step surface located on the outer wall of the valve body and a first inner step surface located on the inner wall of the mounting hole;

[0009] An annular protrusion is provided on the first outer step surface. When the valve body and the valve seat are fixedly connected, the annular protrusion is squeezed and deformed, or embedded in the first inner step surface;

[0010] Alternatively, an annular protrusion is provided on the first inner step surface, and when the valve body and the valve seat are fixedly connected, the annular protrusion is squeezed and deformed, or embedded in the first outer step surface.

[0011] Furthermore, the fixed connection structure is a threaded fitting structure; the valve seat also has a valve cavity, a part of the valve body extends into the valve cavity, and one end of the valve body has a valve port connected to the valve cavity. The threaded fitting structure, the first step fitting structure, and the sealing ring are arranged in sequence, and the distance between the sealing ring and the valve port is smaller than the distance between the first step fitting structure and the valve port.

[0012] Furthermore, the fixed connection structure is a threaded fitting structure; a cavity is formed between the outer wall of the valve body and the inner wall of the mounting hole, the cavity is located between the first step fitting structure and the threaded fitting structure, and a receiving groove is provided in the cavity.

[0013] Furthermore, the outer wall of the valve body and the inner wall of the mounting hole also form a second step matching structure, and the first step matching structure and the second step matching structure are both located between the fixed connection structure and the sealing ring; the valve body and the valve seat corresponding to the second step matching structure are sealed; wherein,

[0014] The second step matching structure is located between the first step matching structure and the sealing ring, and the fixed connection structure, the first step matching structure, the second step matching structure, and the sealing ring are arranged in sequence; or, the second step matching structure is located between the fixed connection structure and the first step matching structure, and the fixed connection structure, the second step matching structure, the first step matching structure, and the sealing ring are arranged in sequence.

[0015] Furthermore, the second step matching structure includes a second outer step surface located on the outer wall of the valve body and a second inner step surface located on the inner wall of the mounting hole, and the second outer step surface is sealingly matched with the second inner step surface.

[0016] Furthermore, the second step matching structure includes a second outer step surface located on the outer wall of the valve body and a second inner step surface located on the inner wall of the mounting hole; the second step matching structure includes an annular protrusion, the annular protrusion is located on the second outer step surface or on the second inner step surface, and the second outer step surface and the second inner step surface are sealed and matched through the annular protrusion.

[0017] Furthermore, when the second step matching structure is located between the fixed connection structure and the first step matching structure, a cavity is formed between the outer wall of the valve body and the inner wall of the mounting hole. The cavity is located between the second step matching structure and the fixed connection structure, and a receiving groove is provided in the cavity.

[0018] Furthermore, in the first step matching structure, and / or in the second step matching structure, the annular protrusions are multiple with different diameters, and the multiple annular protrusions are arranged at intervals along the radial direction of the valve body; and / or the surface of the annular protrusion is an arc surface.

[0019] Furthermore, the part of the valve body that cooperates with the mounting hole includes a threaded section, a first step, a second step and a sealing section that decreases successively along the axial diameter of the valve body. The threaded section and the inner wall of the mounting hole are threadedly connected. The first step cooperation structure is located between the first step and the second step, the second step cooperation structure is located between the second step and the sealing section, and a sealing ring is arranged between the sealing section and the inner wall of the mounting hole.

[0020] Furthermore, the sealing section has an annular sealing groove, and the sealing ring is located in the annular sealing groove; or the inner wall of the mounting hole has an annular sealing groove, and the sealing ring is located in the annular sealing groove.

[0021] In this solution, an annular protrusion is provided on the first step matching structure, which separates the fixed connection structure and the sealing ring between the outer wall of the valve body and the inner wall of the mounting hole. This can effectively prevent debris and impurities generated during the fixed assembly of the valve body and the valve seat from falling into the installation space of the sealing ring and affecting the sealing performance of the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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:

[0023] Figure 1 The figure shows a schematic structural diagram of an electric valve provided by an embodiment of the present utility model;

[0024] Figure 2 Shown Figure 1 A partial enlarged view of

[0025] Figure 3 Shown Figure 2 A partial enlarged view of

[0026] Figure 4 Shown Figure 1 A partial enlarged view of the valve body in the position where it fits with the valve seat;

[0027] Figure 5 Shown Figure 1 A partial enlarged view of the valve seat in the position where it fits with the valve body.

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

[0029] 100, valve body;

[0030] 101, first outer step surface; 102, annular protrusion; 103, second outer step surface; 104, threaded section; 105, first stage; 106, second stage; 107, sealing section; 108, annular sealing groove;

[0031] 110, valve cover; 120, valve tube; 130, valve needle assembly;

[0032] 200, valve seat; 201, valve cavity; 202, first inner stepped surface; 203, receiving groove; 204, second inner stepped surface; 205, first interface; 206, second interface;

[0033] 310. First step matching structure; 320. Second step matching structure; 330. Thread matching structure; 340. Sealing ring. DETAILED DESCRIPTION

[0034] 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 in no way serves as any limitation on 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.

[0035] like Figures 1 to 5 As shown, an embodiment of the present utility model provides an electric valve, comprising a valve body 100 and a valve seat 200, wherein the valve seat 200 has a mounting hole, the valve body 100 is detachably mounted in the mounting hole, and the outer wall of the valve body 100 and the inner wall of the mounting hole form a first step matching structure 310; wherein,

[0036] The first step mating structure 310 includes an annular protrusion 102. The valve body 100 corresponding to the first step mating structure 310 is sealed and mated with the valve seat 200 via the annular protrusion 102. The valve body 100 corresponding to the second step mating structure 320 is sealed and mated with the valve seat 200. A fixed connection structure and a sealing ring 340 are also provided between the outer wall of the valve body 100 and the inner wall of the mounting hole, spaced axially. The first step mating structure 310 is located between the threaded mating structure 330 and the sealing ring 340. Debris is easily generated during the fixed assembly process of the valve body 100 and the valve seat 200. Debris can enter the position of the sealing ring 340 under the action of gravity or airflow, affecting the sealing effect of the sealing ring 340 and possibly causing leakage. In this solution, the fixed connection structure and the sealing ring 340 are isolated by the annular protrusion 102, which can prevent debris from entering the position of the sealing ring 340.

[0037] The first step matching structure 310 includes a first outer step surface 101 located on the outer wall of the valve body 100 and a first inner step surface 202 located on the inner wall of the mounting hole. The annular protrusion 102 can be located on the first outer step surface 101 or the first inner step surface 202.

[0038] When an annular protrusion 102 is provided on the first outer stepped surface 101, the annular protrusion 102 is made of the same material as the first outer stepped surface 101, and the material hardness of the annular protrusion 102 and the first outer stepped surface 101 is less than that of the first inner stepped surface 202. When the valve body 100 and the valve seat 200 are fixedly connected, the annular protrusion 102 is squeezed and deformed to form a plane that is completely in contact with the first inner stepped surface 202, thereby ensuring a sealing effect between the first outer stepped surface 101 and the first inner stepped surface 202.

[0039] When an annular protrusion 102 is provided on the first outer stepped surface 101, the annular protrusion 102 is made of the same material as the first outer stepped surface 101, and the hardness of the annular protrusion 102 and the first outer stepped surface 101 is greater than that of the first inner stepped surface 202, when the valve body 100 and the valve seat 200 are fixedly connected, the annular protrusion 102 is embedded in the first inner stepped surface 202. A hard seal is formed between the first outer stepped surface 101 and the first inner stepped surface 202, achieving a sealed connection between the valve body 100 and the valve seat 200 between the first outer stepped surface 101 and the first inner stepped surface 202.

[0040] When an annular protrusion 102 is provided on the first inner stepped surface 202, the annular protrusion 102 is made of the same material as the first inner stepped surface 202, and the material hardness of the annular protrusion 102 and the first inner stepped surface 202 is less than that of the first outer stepped surface 101. When the valve body 100 and the valve seat 200 are fixedly connected, the annular protrusion 102 is squeezed and deformed to form a plane that is completely in contact with the first outer stepped surface 101, thereby ensuring a sealing effect between the first outer stepped surface 101 and the first inner stepped surface 202.

[0041] When an annular protrusion 102 is provided on the first inner stepped surface 202, the annular protrusion 102 is made of the same material as the first inner stepped surface 202, and the hardness of the annular protrusion 102 and the first inner stepped surface 202 is greater than that of the first outer stepped surface 101, when the valve body 100 and the valve seat 200 are fixedly connected, the annular protrusion 102 is embedded in the first outer stepped surface 101. A hard seal is formed between the first outer stepped surface 101 and the first inner stepped surface 202, achieving a sealing effect on the connection between the valve body 100 and the valve seat 200 between the first outer stepped surface 101 and the first inner stepped surface 202.

[0042] like Figure 2 and Figure 3 As shown, the fixed connection structure is a threaded fitting structure 330 , that is, the valve body 100 and the valve seat 200 are connected by threaded fitting, which is convenient for installation and disassembly.

[0043] During the tightening or loosening process, machining errors and friction can create debris between the internal and external threads. External debris can also enter the gap between the internal and external threads. In the prior art, this debris, under the influence of gravity or airflow, can enter the location of sealing ring 340, affecting its sealing effectiveness and potentially causing leakage.

[0044] In this solution, the threaded mating structure 330 and the sealing ring 340 are separated by the annular protrusion 102 on the first step mating structure 310, thereby preventing debris from entering the position where the sealing ring 340 is located from the threaded mating structure 330, thereby preventing the debris from affecting the sealing performance of the sealing ring 340.

[0045] The valve seat 200 also has a valve cavity 201. A portion of the valve body 100 extends into the valve cavity 201. One end of the valve body 100 has a valve port connected to the valve cavity 201. A threaded mating structure 330, a first step mating structure 310, and a sealing ring 340 are sequentially arranged. The distance between the sealing ring 340 and the valve port is smaller than the distance between the second step mating structure 320 and the valve port. During the fixed assembly process of the valve body 100 and the valve seat 200, debris generated is separated by gravity by the first step mating structure 310 and does not enter the location of the sealing ring 340. The interior of the valve body 100 is a main cavity. The circumferential sidewall of the main cavity is provided with a through hole connecting the valve cavity 201 and the main cavity. The sealing ring 340 is located on the side of the through hole away from the valve port.

[0046] A cavity is formed between the outer wall of the valve body 100 and the inner wall of the mounting hole. The cavity is located between the first step mating structure 310 and the threaded mating structure 330. A receiving groove 203 is provided in the cavity. When debris falls from the threaded mating structure 330, it enters the receiving groove 203 and is collected by the receiving groove 203, preventing the debris from entering the first step mating structure 310, thereby further preventing the debris from entering the location of the sealing ring 340.

[0047] The outer wall of the valve body 100 and the inner wall of the mounting hole further form a second stepped mating structure 320. Both the first and second stepped mating structures 310 and 320 are located between the fixed connection structure and the sealing ring 340. The second stepped mating structure 320 forms a sealed fit between the valve body 100 and the valve seat 200. The second stepped mating structure 320 and the first stepped mating structure 310 achieve a double-layer seal between the valve body 100 and the valve seat 200.

[0048] like Figure 1As shown, the second step mating structure 320 is located between the first step mating structure 310 and the sealing ring 340, with the fixed connection structure, first step mating structure 310, second step mating structure 320, and sealing ring 340 arranged in this order. Alternatively, in other embodiments not shown, the second step mating structure 320 is located between the fixed connection structure and the first step mating structure 310, with the fixed connection structure, second step mating structure 320, first step mating structure 310, and sealing ring 340 arranged in this order. Both of these arrangements prevent debris from entering the area where the sealing ring 340 is located, ensuring the seal of the sealing ring 340.

[0049] When the second step matching structure 320 is located between the fixed connection structure and the first step matching structure 310, the cavity formed between the outer wall of the valve body 100 and the inner wall of the mounting hole is located between the second step matching structure 320 and the fixed connection structure. A receiving groove 203 is provided in the cavity. When debris falls, it will enter the receiving groove 203 and be collected by the receiving groove 203, thereby preventing the debris from entering the position of the first step matching structure 310, thereby further preventing the debris from entering the position where the sealing ring 340 is located.

[0050] The second step matching structure 320 includes a second outer step surface 103 located on the outer wall of the valve body 100 and a second inner step surface 204 located on the inner wall of the mounting hole.

[0051] Furthermore, the outer wall of the valve body 100 has an annular second outer stepped surface 103, and the inner wall of the mounting hole has a second inner stepped surface 204 corresponding to the second outer stepped surface 103. During assembly, the second outer stepped surface 103 and the second inner stepped surface 204 abut to achieve a seal. The second outer stepped surface 103 and the second inner stepped surface 204 form a second step mating structure 320. The abutment between the second outer stepped surface 103 and the second inner stepped surface 204 ensures a reliable seal.

[0052] The second step matching structure 320 includes an annular protrusion 102. The valve body 100 corresponding to the second step matching structure 320 is sealed with the valve seat 200 via the annular protrusion 102. The principle of the second step matching structure 320 enhancing the seal through the annular protrusion 102 is the same as that of the first step matching structure 310.

[0053] The first step matching structure 310 includes an annular protrusion 102, and the valve body 100 corresponding to the first step matching structure 310 is sealed and matched with the valve seat 200 through the annular protrusion 102, and the second step matching structure 320 includes an annular protrusion 102, and the valve body 100 corresponding to the second step matching structure 320 is sealed and matched with the valve seat 200 through the annular protrusion 102.

[0054] In this solution, the connection between the valve body 100 and the valve seat 200 is achieved through at least two stepped mating structures. Since at least one of these stepped mating structures includes an annular protrusion 102, the annular protrusion 102 ensures that both the first stepped mating structure 310 and the second stepped mating structure 320 are sealed after assembly, ensuring a good seal. This solution achieves sealing by providing the annular protrusion 102 at the mating position, thus eliminating the need for high machining precision and reducing manufacturing costs. The electric valve can be a solenoid valve, an electronic expansion valve, or other similar valve.

[0055] Due to the small cross-sectional dimensions of the annular protrusion 102, it is easier for the annular protrusion 102 to contact and seal with the corresponding structure than with a planar stepped structure for direct sealing. Furthermore, the annular protrusion 102 easily deforms when subjected to force, resulting in more complete contact with the corresponding structure and a better sealing effect.

[0056] The second step-matching structure 320 may also be provided without the annular protrusion 102. When the first step-matching structure 310 is provided with the annular protrusion 102 and the second step-matching structure 320 is not provided with the annular protrusion 102, the annular protrusion 102 is squeezed and deformed during assembly, and the valve body 100 corresponding to one step-matching structure is sealed with the valve seat 200 via the annular protrusion 102. The deformation of the annular protrusion 102 also eliminates the machining error of the second step-matching structure 320, allowing the valve body 100 corresponding to the second step-matching structure 320 to directly and sealably mate with the valve seat 200. When the annular protrusion 102 is embedded, it can also compensate for the machining error between the two step-matching structures, allowing the valve body 100 corresponding to the second step-matching structure 320 to directly and sealably mate with the valve seat 200.

[0057] When an annular protrusion 102 is provided in both the first step mating structure 310 and the second step mating structure 320, the annular protrusions 102 in both step mating structures are squeezed and deformed during assembly. Due to the processing error, the degree of deformation can be different, and after deformation, the two step mating structures can achieve a sealed fit. Moreover, when the annular protrusion 102 in one step mating structure is damaged, the annular protrusion 102 in the other step mating structure can still be deformed and sealed, ensuring that the positions where the two step mating structures are located can achieve a sealed fit, thereby improving reliability. When the annular protrusion 102 is embedded, it can also compensate for the processing error between the two step mating structures, so that the valve body 100 corresponding to the two step mating structures can directly and sealedly fit with the valve seat 200.

[0058] When only the first step mating structure 310 includes an annular protrusion 102, the annular protrusion 102 is located on the first outer step surface 101 or the first inner step surface 202. The first outer step surface 101 and the first inner step surface 202 are sealed together via the annular protrusion 102, while the second outer step surface 103 and the second inner step surface 204 are in direct contact to achieve a sealed fit. In this case, a single annular protrusion 102 achieves sealing at the locations where the two step mating structures are located, and the annular protrusion 102 can compensate for machining errors between the two step mating structures.

[0059] In the case where both the first step matching structure 310 and the second step matching structure 320 include an annular protrusion 102, the first outer step surface 101 or the first inner step surface 202 has an annular protrusion 102, and the second outer step surface 103 or the second inner step surface 204 has an annular protrusion 102. The first outer step surface 101 and the first inner step surface 202 are sealed and matched via the annular protrusion 102, and the second outer step surface 103 and the second inner step surface 204 are sealed and matched via the annular protrusion 102. In this case, the two step matching structures are sealed by the two annular protrusions 102. During use, one of the annular protrusions 102 can be compressed to compensate for the processing error between the two step matching structures until the other annular protrusion 102 is also deformed or not deformed, that is, the extrusion deformation of one annular protrusion 102 is greater than the extrusion deformation of the other annular protrusion 102, thereby compensating for the processing error between the two step matching structures. When the annular protrusion 102 is embedded, it can also compensate for the processing error between the two step matching structures, so that the valve body 100 corresponding to the two step matching structures can directly and tightly match with the valve seat 200.

[0060] In this solution, the threaded mating structure 330 and the sealing ring 340 are separated by at least two step mating structures with reliable sealing, thereby preventing debris from entering the position where the sealing ring 340 is located from the threaded mating structure 330, thereby preventing the debris from affecting the sealing performance of the sealing ring 340.

[0061] like Figure 1 As shown, the threaded mating structure 330, the first step mating structure 310, the second step mating structure 320, and the sealing ring 340 are arranged in sequence. Alternatively, in other embodiments not shown, the sealing ring 340, the second step mating structure 320, the first step mating structure 310, and the threaded mating structure 330 are arranged in sequence. Both arrangements prevent debris from entering the location of the sealing ring 340 from the threaded mating structure 330, ensuring the seal of the sealing ring 340.

[0062] like Figure 2 and Figure 3As shown, in a specific embodiment, the threaded mating structure 330, the first step mating structure 310, the second step mating structure 320, and the sealing ring 340 are arranged in sequence from top to bottom; the outer wall of the valve body 100 has an annular first outer step surface 101, and the inner wall of the mounting hole has a first inner step surface 202 corresponding to the first outer step surface 101, and the first inner step surface 202 has a receiving groove 203 arranged around the first outer step surface 101, and the receiving groove 203 is used to receive debris falling from the threaded mating structure 330.

[0063] In this way, when the debris in the threaded mating structure 330 falls under the action of gravity, it will enter the receiving groove 203 and be collected by the receiving groove 203, preventing the debris from entering the position of the first outer step surface 101, thereby further preventing the debris from entering the position where the sealing ring 340 is located.

[0064] like Figures 2 to 5 As shown, in a specific embodiment, the outer wall of the valve body 100 has an annular first outer step surface 101, and an annular protrusion 102 is provided on the first outer step surface 101. The first outer step surface 101 and the annular protrusion 102 are an integral structure, and the inner wall of the mounting hole has a first inner step surface 202 corresponding to the first outer step surface 101; during assembly, the first outer step surface 101 and the first inner step surface 202 squeeze and deform the annular protrusion 102 to achieve sealing; the first step matching structure 310 includes the first outer step surface 101, the annular protrusion 102 and the first inner step surface 202.

[0065] The annular protrusion 102 is a protruding structure with a small width, and is easily deformed when squeezed, so that it can fully contact the first inner step surface 202 to achieve reliable sealing; and through the deformation of the annular protrusion 102, the second step matching structure 320 is avoided from having a matching gap, so that the second step matching structure 320 can also be reliably sealed.

[0066] The surface of the annular protrusion 102 is an arc surface, so that after deformation, the contact area with the first inner stepped surface 202 is large, and the sealing effect is good.

[0067] Alternatively, in other embodiments not shown, the outer wall of the valve body 100 has an annular first outer step surface 101, the inner wall of the mounting hole has a first inner step surface 202 corresponding to the first outer step surface 101, and an annular protrusion 102 is provided on the first inner step surface 202, and the first inner step surface 202 and the annular protrusion 102 are an integral structure; during assembly, the first outer step surface 101 and the first inner step surface 202 squeeze and deform the annular protrusion 102 to achieve sealing; the first step matching structure 310 includes the first outer step surface 101, the annular protrusion 102 and the first inner step surface 202.

[0068] The annular protrusion 102 may be provided in a plurality with different diameters. The plurality of annular protrusions 102 are arranged at intervals along the radial direction of the valve body 100 . The plurality of annular protrusions 102 may improve the sealing effect.

[0069] like Figure 4 As shown, the part of the valve body 100 that cooperates with the mounting hole includes a threaded section 104, a first step 105, a second step 106 and a sealing section 107, which decrease in sequence along the axial diameter of the valve body 100. The threaded section 104 is threadedly connected to the inner wall of the mounting hole. The first step matching structure 310 is located between the first step 105 and the second step 106. The second step matching structure 320 is located between the second step 106 and the sealing section 107. A sealing ring 340 is provided between the sealing section 107 and the inner wall of the mounting hole.

[0070] By setting up the multi-stage structure, the part of the valve body 100 that matches with the mounting hole is easy to process, forming a two-step matching structure, and is convenient to be inserted into the valve seat 200.

[0071] The sealing section 107 has an annular sealing groove 108 , and the sealing ring 340 is located in the annular sealing groove 108 ; or the inner wall of the mounting hole has an annular sealing groove 108 , and the sealing ring 340 is located in the annular sealing groove 108 .

[0072] like Figure 1 As shown, the valve body 100 includes a valve cover 110, a valve tube 120, and a valve needle assembly 130. The valve tube 120 and the valve cover 110 are connected, and the valve needle assembly 130 is movably arranged in the valve tube 120 and the valve cover 110. The valve cover 110 is connected to the mounting hole. One end of the valve cover 110 has a valve port, and the side wall of the valve cover 110 has a flow port. The valve needle assembly 130 opens and closes the valve port. The valve seat 200 has a valve cavity 201, a first interface 205, and a second interface 206. The first interface 205, the valve cavity 201, and the flow port are connected in sequence, and the second interface 206 is connected to the valve port. When the valve port is open, the first interface 205 and the second interface 206 are connected. When the valve port is closed, the first interface 205 and the second interface 206 are disconnected.

[0073] In the above solution, the connection between the valve body 100 and the valve seat 200 is achieved through at least two stepped mating structures. Since at least one of these stepped mating structures undergoes extrusion deformation during assembly, this ensures that both the first stepped mating structure 310 and the second stepped mating structure 320 are sealed after assembly, ensuring a good sealing effect. This solution achieves sealing through elastic deformation at the mating location, thus requiring less high machining precision and reducing manufacturing costs.

[0074] The above are merely optional embodiments of this solution and are not intended to limit this solution. Those skilled in the art will readily appreciate that this solution may be modified and varied in various ways. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this solution shall be included within the scope of protection of this solution.

[0075] 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.

[0076] Unless otherwise specified, the relative arrangement of the parts and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of this solution. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to actual proportional relationships. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the techniques, methods and equipment should be considered as part of the specification. In all examples shown and discussed here, any specific values should be interpreted as being merely exemplary, rather than limiting. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0077] In the description of this scheme, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this scheme and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this scheme; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0078] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0079] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this solution.

Claims

1. An electric valve, characterized in that: The valve body (100) comprises a valve body (100) and a valve seat (200), wherein the valve seat (200) has a mounting hole, the valve body (100) is mounted in the mounting hole, and the outer wall of the valve body (100) and the inner wall of the mounting hole form a first step matching structure (310); wherein, The first step matching structure (310) includes an annular protrusion (102), and the valve body (100) corresponding to the first step matching structure (310) is sealed and matched with the valve seat (200) through the annular protrusion (102). There is also a fixed connection structure and a sealing ring (340) arranged in an axial direction between the outer wall of the valve body (100) and the inner wall of the mounting hole, and the first step matching structure (310) is located between the fixed connection structure and the sealing ring (340).

2. The electric valve according to claim 1, characterized in that The first step matching structure (310) comprises a first outer step surface (101) located on the outer wall of the valve body (100) and a first inner step surface (202) located on the inner wall of the mounting hole; The annular protrusion (102) is provided on the first outer stepped surface (101); when the valve body (100) and the valve seat (200) are fixedly connected, the annular protrusion (102) is squeezed and deformed, or embedded in the first inner stepped surface (202); Alternatively, the annular protrusion (102) is provided on the first inner stepped surface (202), and when the valve body (100) and the valve seat (200) are fixedly connected, the annular protrusion (102) is squeezed and deformed, or embedded in the first outer stepped surface (101).

3. The electric valve according to claim 1, characterized in that The fixed connection structure is a threaded fitting structure (330); the valve seat (200) also has a valve cavity (201), a portion of the valve body (100) extends into the valve cavity (201), and one end of the valve body (100) has a valve port connected to the valve cavity (201), the threaded fitting structure (330), the first step fitting structure (310), and the sealing ring (340) are arranged in sequence, and the distance between the sealing ring (340) and the valve port is smaller than the distance between the first step fitting structure (310) and the valve port.

4. The electric valve according to claim 1 or 3, characterized in that: The fixed connection structure is a threaded fitting structure (330); a cavity is formed between the outer wall of the valve body (100) and the inner wall of the mounting hole, the cavity is located between the first step fitting structure (310) and the threaded fitting structure (330), and a receiving groove (203) is provided in the cavity.

5. The electric valve according to claim 1 or 2, characterized in that: The outer wall of the valve body (100) and the inner wall of the mounting hole further form a second step matching structure (320), and the first step matching structure (310) and the second step matching structure (320) are both located between the fixed connection structure and the sealing ring (340); the valve body (100) and the valve seat (200) corresponding to the second step matching structure (320) are sealed and matched; wherein, Claims PN290920DUNANRG The second step matching structure (320) is located between the first step matching structure (310) and the sealing ring (340), and the fixed connection structure, the first step matching structure (310), the second step matching structure (320), and the sealing ring (340) are arranged in sequence; Alternatively, the second step matching structure (320) is located between the fixed connection structure and the first step matching structure (310), and the fixed connection structure, the second step matching structure (320), the first step matching structure (310), and the sealing ring (340) are arranged in sequence.

6. The electric valve according to claim 5, characterized in that: The second step matching structure (320) includes a second outer step surface (103) located on the outer wall of the valve body (100) and a second inner step surface (204) located on the inner wall of the mounting hole, and the second outer step surface (103) and the second inner step surface (204) are sealed and matched.

7. The electric valve according to claim 5, characterized in that The second step matching structure (320) includes a second outer step surface (103) located on the outer wall of the valve body (100) and a second inner step surface (204) located on the inner wall of the mounting hole; The second step matching structure (320) includes the annular protrusion (102), and the annular protrusion (102) is located on the second outer step surface (103) or on the second inner step surface (204). The second outer step surface (103) and the second inner step surface (204) are sealed and matched through the annular protrusion (102).

8. The electric valve according to claim 5, characterized in that When the second step matching structure (320) is located between the fixed connection structure and the first step matching structure (310), a cavity is formed between the outer wall of the valve body (100) and the inner wall of the mounting hole. The cavity is located between the second step matching structure (320) and the fixed connection structure, and a receiving groove (203) is provided in the cavity.

9. The electric valve according to claim 7, characterized in that In the first step matching structure (310), and / or in the second step matching structure (320), the annular protrusions (102) are multiple and have different diameters, and the multiple annular protrusions (102) are arranged at intervals along the radial direction of the valve body (100); and / or the surface of the annular protrusion (102) is an arc surface.

10. The electric valve according to claim 5, characterized in that The part of the valve body (100) that cooperates with the mounting hole includes a threaded section (104), a first step (105), a second step (106) and a sealing section (107) whose axial diameter decreases successively along the valve body (100); the threaded section (104) and the inner wall of the mounting hole are threadedly connected; the first step cooperation structure (310) is located between the first step (105) and the second step (106); the second step cooperation structure (320) is located between the second step (106) and the sealing section (107); and a sealing ring (340) is provided between the sealing section (107) and the inner wall of the mounting hole.

11. The electric valve according to claim 10, characterized in that The sealing section (107) has an annular sealing groove (108), and the sealing ring (340) is located in the annular sealing groove (108); or the inner wall of the mounting hole has an annular sealing groove (108), and the sealing ring (340) is located in the annular sealing groove (108).

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