Electric valve

Abstract

The utility model provides an electric valve which comprises a valve body, a valve seat and a sealing ring, in the scheme, on the basis that the sealing ring is arranged between the valve body and the valve seat for sealing, the outer wall of the valve body and / or the inner wall of a mounting hole are / is provided with an annular protrusion, and the outer wall of the valve body and the inner wall of the mounting hole are / is sealed through the annular protrusion. Under the condition that the sealing ring is used for soft sealing, at least one hard seal is added through the annular protrusion, so that the sealing effect is enhanced, leakage of refrigerants in the valve cavity is avoided, and safety is improved. Moreover, in the scheme, the sealing ring is closer to the valve cavity relative to the annular protrusion, so that the sealing ring can block all or most of refrigerants in the valve cavity and prevent the refrigerants from leaking, even if the refrigerants flow to the position of the annular protrusion after leaking through the sealing ring, only a small amount of refrigerants are leaked, and the sealing effect is better. And the annular bulge can achieve a good sealing effect on a small amount of refrigerant, so that leakage of the refrigerant can be 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. A sealing ring is typically installed between the valve body and the valve seat to prevent refrigerant leakage from the valve seat. However, for environments requiring high sealing performance, such as air conditioners using flammable and explosive environmentally friendly refrigerants, existing sealing methods lack reliability and pose a risk of leakage, compromising safety and failing to meet these requirements. Utility Model Content

[0004] The utility model provides an electric valve to solve the problem in the prior art that the sealing performance between the valve body and the valve seat of the electric valve is poor, thereby affecting the safety.

[0005] In order to solve the above problems, the utility model provides an electric valve, including: a valve body and a valve seat, the valve seat has a mounting hole and a valve cavity, the valve body can be detachably mounted on the mounting hole, the outer wall of the valve body and / or the inner wall of the mounting hole has an annular protrusion, the outer wall of the valve body and the inner wall of the mounting hole are sealed and matched through the annular protrusion; a fixed connection structure and a sealing ring arranged along the axial interval are provided between the outer wall of the valve body and the inner wall of the mounting hole; wherein the annular protrusion, the sealing ring and the valve cavity are arranged in sequence.

[0006] Furthermore, the valve body includes a valve cover, which is detachably mounted on the mounting hole, wherein:

[0007] The valve cover has an annular protrusion, and the hardness of the valve cover is greater than the hardness of the valve seat;

[0008] Or the valve seat has an annular protrusion, and the hardness of the valve seat is greater than the hardness of the valve cover.

[0009] Furthermore, there are multiple annular protrusions, and the multiple annular protrusions are distributed in the radial direction and / or axial direction of the mounting hole.

[0010] Furthermore, the radial cross-section of the annular protrusion is triangular, rectangular, trapezoidal or arcuate.

[0011] Furthermore, the fixed connection structure is a threaded fitting structure, and there is a threaded fitting structure between the outer wall of the valve body and the inner wall of the mounting hole. The annular protrusion is located between the threaded fitting structure and the sealing ring. The threaded fitting structure applies a clamping force to the annular protrusion after tightening.

[0012] Furthermore, the valve body includes a valve cover, the outer wall of the valve cover and / or the inner wall of the mounting hole have an annular protrusion, the valve cover has an external thread, the inner wall of the mounting hole has an internal thread, and the internal thread and the external thread cooperate to form a threaded cooperation structure.

[0013] Alternatively, the valve body includes a valve cover and a pressure ring, the outer wall of the valve cover and / or the inner wall of the mounting hole have an annular protrusion, the pressure ring is sleeved on the valve cover and has an interference fit with the valve cover, and the pressure ring and the valve cover are axially limited, the pressure ring has an external thread, and the inner wall of the mounting hole has an internal thread, the internal thread and the external thread cooperate to form a threaded cooperation structure, and the pressure ring applies pressure to the valve cover after tightening.

[0014] Furthermore, the sealing ring is located between the peripheral outer wall of the valve body and the inner wall of the mounting hole.

[0015] Furthermore, the valve body includes a first body and a second body connected to each other, the end of the second body extends into the first body and is connected to the first body, and the sealing ring is located on the outer wall of the first body; a sealing member is provided between the outer wall of the second body and the valve seat.

[0016] Furthermore, the outer wall of the valve body and the inner wall of the mounting hole form a first step matching structure, and the first step matching structure has an annular protrusion.

[0017] Furthermore, the outer wall of the valve body and the inner wall of the mounting hole also constitute a second step matching structure, and the first step matching structure and the second step matching structure are arranged at intervals along the axial direction of the mounting hole; wherein, the second step matching structure has an annular protrusion or the second step matching structure has no annular protrusion.

[0018] 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, and 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;

[0019] In the case where only the first step matching structure includes an annular protrusion, the annular protrusion is located on the first outer step surface or on the first inner step surface, the first outer step surface and the first inner step surface are sealed together via the annular protrusion, and the second outer step surface and the second inner step surface are sealed together;

[0020] In the case where only 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, the second outer step surface and the second inner step surface are sealed together via the annular protrusion, and the first outer step surface and the first inner step surface are sealed together;

[0021] When the first step mating structure and the second step mating structure both include annular protrusions, the first outer step surface or the first inner step surface has an annular protrusion, the second outer step surface or the second inner step surface has an annular protrusion, the first outer step surface and the first inner step surface are sealed and matched through the annular protrusion, and the second outer step surface and the second inner step surface are sealed and matched through the annular protrusion.

[0022] Furthermore, there is a threaded fitting structure between the outer wall of the valve body and the inner wall of the mounting hole, and the threaded fitting structure, the first step fitting structure, the second step fitting structure, the sealing ring, and the valve cavity are arranged in sequence, or the sealing ring, the first step fitting structure, the second step fitting structure, the threaded fitting structure, and the valve cavity are arranged in sequence.

[0023] Furthermore, there is a threaded fitting structure between the outer wall of the valve body and the inner wall of the mounting hole, and the threaded fitting structure, the first step fitting structure, and the sealing ring are arranged in sequence; a cavity is formed between the outer wall of the valve body and the inner wall of the mounting hole, and the cavity is located between the first step fitting structure and the threaded fitting structure, and a receiving groove is arranged in the cavity.

[0024] Furthermore, an annular protrusion is provided on the first outer step surface, and the first outer step surface and the annular protrusion are an integrated structure, or an annular protrusion is provided on the first inner step surface, and the first inner step surface and the annular protrusion are an integrated structure.

[0025] Furthermore, an annular protrusion is provided on the second outer step surface, and the second outer step surface and the annular protrusion are an integrated structure, or an annular protrusion is provided on the second inner step surface, and the second inner step surface and the annular protrusion are an integrated structure.

[0026] Further, 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.

[0027] 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.

[0028] 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.

[0029] The utility model provides an electric valve, comprising a valve body, a valve seat, and a sealing ring. The valve seat has a mounting hole and a valve cavity. The valve body is detachably mounted in the mounting hole. The outer wall of the valve body and / or the inner wall of the mounting hole have an annular protrusion. The outer wall of the valve body and the inner wall of the mounting hole are sealed by the annular protrusion. A fixed connection structure and a sealing ring are axially spaced apart between the outer wall of the valve body and the inner wall of the mounting hole. When the valve body is connected to the valve seat by the fixed connection structure, the annular protrusion of the valve body is embedded in the valve seat, or the annular protrusion of the valve seat is embedded in the valve body. The annular protrusion, the sealing ring, and the valve cavity are arranged in sequence. In this solution, in addition to the sealing ring provided between the valve body and the valve seat for sealing, the outer wall of the valve body and / or the inner wall of the mounting hole have an annular protrusion. The annular protrusion seals the outer wall of the valve body and the inner wall of the mounting hole. That is, while the sealing ring is used for soft sealing, the annular protrusion adds at least one hard seal, thereby enhancing the sealing effect, preventing refrigerant leakage in the valve cavity, and improving safety. Furthermore, in this solution, the sealing ring is closer to the valve cavity than the annular protrusion. This allows the sealing ring to block all or most of the refrigerant in the valve cavity, preventing refrigerant leakage. Even if the refrigerant leaks through the sealing ring and flows to the annular protrusion, only a small amount of refrigerant leaks. The annular protrusion, facing a small amount of refrigerant, can provide a good sealing effect, thereby preventing refrigerant leakage. Therefore, the relative positioning of the annular protrusion, sealing ring, and valve cavity in this solution also improves the sealing effect of the electric valve. This type of electric valve is suitable for use in environments with high sealing requirements. For example, when the refrigerant is the highly flammable R290, this solution can prevent leakage and ensure the safety of R290 use. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] 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:

[0031] Figure 1 The figure shows a schematic structural diagram of the electric valve provided in the first embodiment of the present utility model;

[0032] Figure 2 Shown Figure 1 A partial enlarged view of

[0033] Figure 3 Shown Figure 1 Schematic diagram of the valve cover;

[0034] Figure 4 The figure shows a schematic structural diagram of the electric valve provided in the second embodiment of the present utility model;

[0035] Figure 5Shown Figure 4 A partial enlarged view of

[0036] Figure 6 Shown Figure 4 Schematic diagram of the valve cover;

[0037] Figure 7 The figure shows a schematic structural diagram of the electric valve provided in the third embodiment of the present utility model;

[0038] Figure 8 Shown Figure 7 A partial enlarged view of

[0039] Figure 9 Shown Figure 8 A partial enlarged view of

[0040] Figure 10 Shown Figure 7 A partial enlarged view of the valve body in the position where it fits with the valve seat;

[0041] Figure 11 Shown Figure 7 A partial enlarged view of the valve seat in the position where it fits with the valve body.

[0042] The above drawings include the following reference numerals:

[0043] 100, valve body; 150, first body; 160, second body; 170, sealing member;

[0044] 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;

[0045] 110, valve cover; 120, valve tube; 130, valve needle assembly; 140, pressure ring;

[0046] 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;

[0047] 310. First step matching structure; 320. Second step matching structure; 330. Thread matching structure; 340. Sealing ring. DETAILED DESCRIPTION

[0048] 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.

[0049] like Figure 1 As shown, embodiment 1 of the present invention provides an electric valve, including a valve body 100, a valve seat 200 and a sealing ring 340, the valve seat 200 has a mounting hole and a valve cavity 201, the valve body 100 is detachably mounted on the mounting hole, the outer wall of the valve body 100 and / or the inner wall of the mounting hole has an annular protrusion 102, the outer wall of the valve body 100 and the inner wall of the mounting hole are sealed together by the annular protrusion 102; a fixed connection structure and a sealing ring 340 arranged along the axial interval are provided between the outer wall of the valve body 100 and the inner wall of the mounting hole; wherein the annular protrusion 102, the sealing ring 340 and the valve cavity 201 are arranged in sequence.

[0050] In this solution, in addition to providing a sealing ring 340 between the valve body 100 and the valve seat 200, an annular protrusion 102 is provided on the outer wall of the valve body 100 and / or the inner wall of the mounting hole. This annular protrusion 102 seals the outer wall of the valve body 100 and the inner wall of the mounting hole. This means that while the sealing ring 340 provides a soft seal, the annular protrusion 102 adds at least one hard seal, thereby enhancing the sealing effect, preventing refrigerant leakage within the valve cavity 201, and improving safety. During the process of connecting the valve body 100 to the valve seat 200 via the fixed connection structure, pressure is applied to the annular protrusion 102, causing the annular protrusion 102 of the valve body 100 to embed into the valve seat 200, or vice versa. Alternatively, the sealing performance between the valve body 100 and the valve seat 200 can be enhanced by compressing and deforming the annular protrusion 102. The sealing performance between the valve body 100 and the valve seat 200 is preferably enhanced by embedding the annular protrusion 102 .

[0051] Among them, the outer wall of the valve body 100 may have an annular protrusion 102, that is, the annular protrusion 102 is a part of the outer wall of the valve body 100; the inner wall of the mounting hole may have an annular protrusion 102, that is, the annular protrusion 102 is a part of the inner wall of the mounting hole; or, the annular protrusion 102 may be respectively provided on the outer wall of the valve body 100 and the inner wall of the mounting hole.

[0052] Moreover, in this solution, the sealing ring 340 is closer to the valve cavity 201 relative to the annular protrusion 102, so that the sealing ring 340 can block all or most of the refrigerant in the valve cavity 201 to prevent refrigerant leakage. Even if the refrigerant leaks through the sealing ring 340 and flows to the position of the annular protrusion 102, only a small amount of refrigerant leaks. The annular protrusion 102 faces a small amount of refrigerant and can achieve a good sealing effect, thereby preventing the occurrence of refrigerant leakage. Therefore, the relative position setting of the annular protrusion 102, the sealing ring 340 and the valve cavity 201 in this solution also improves the sealing effect of the electric valve. This electric valve is suitable for use in environments with high sealing requirements. For example, when the refrigerant uses highly flammable R290, this solution can avoid leakage and ensure the safety of R290.

[0053] The valve body 100 includes a valve cover 110, which is detachably mounted in the mounting hole. In one embodiment, the valve cover 110 has an annular protrusion 102, and the hardness of the valve cover 110 is greater than the hardness of the valve seat 200. Alternatively, in other embodiments, the valve seat 200 has an annular protrusion 102, and the hardness of the valve seat 200 is greater than the hardness of the valve cover 110.

[0054] Specifically, there is a hardness difference between the valve cover 110 and the valve seat 200, with the annular protrusion 102 located on the harder structure. Thus, after the valve cover 110 and valve seat 200 are assembled, the annular protrusion 102 exerts pressure on the less hard structure in contact with it, causing the less hard structure to deform at the contact point. This increases the contact area with the annular protrusion 102 and improves the sealing effect after assembly. For example, the valve cover 110 may be made of stainless steel, the annular protrusion 102 may be located on the valve cover 110, and the valve seat 200 may be made of aluminum alloy.

[0055] like Figure 2 and Figure 3 As shown, there is one annular protrusion 102. In other embodiments, the annular protrusion 102 may be provided in plurality, and the plurality of annular protrusions 102 may be distributed radially and / or axially of the mounting hole. The plurality of annular protrusions 102 may further enhance the sealing effect and prevent leakage of the electric valve.

[0056] The radial cross-section of the annular protrusion 102 can be triangular, rectangular, trapezoidal or arcuate, etc. The annular protrusions 102 of these different shapes can fully contact with the corresponding surface after assembly, thereby achieving sealing.

[0057] like Figure 1As shown, the fixed connection structure is a threaded fitting structure 330. A threaded fitting structure 330 is provided between the outer wall of the valve body 100 and the inner wall of the mounting hole. The annular protrusion 102 is located between the threaded fitting structure 330 and the sealing ring 340. The threaded fitting structure 330 applies a pressing force to the annular protrusion 102 after being tightened.

[0058] The threaded connection between the valve body 100 and the valve seat 200 is achieved through the threaded mating structure 330, facilitating assembly and disassembly. Furthermore, during the threaded tightening process, sufficient torque is applied to press the mating surfaces between the outer wall of the valve body 100 and the inner wall of the mounting hole together, thereby compressing the annular protrusion 102 and achieving a seal at the location of the annular protrusion 102.

[0059] like Figures 1 to 3 As shown, in the first embodiment, the valve body 100 includes a valve cover 110. The outer wall of the valve cover 110 and / or the inner wall of the mounting hole have an annular protrusion 102. The valve cover 110 has an external thread, and the inner wall of the mounting hole has an internal thread. The internal and external threads cooperate to form a threaded mating structure 330. That is, the external thread is provided on the valve cover 110 to achieve connection with the valve seat 200.

[0060] In this solution, the outer wall of the valve body 100 and the inner wall of the mounting hole form a first step-matching structure 310, and the first step-matching structure 310 has an annular protrusion 102. The first step-matching structure 310 allows the valve body 100 and the valve seat 200 to be accurately positioned during assembly. The two mating surfaces of a conventional step-matching structure are planes. Due to processing and assembly errors, the two mating planes are difficult to fully contact, so there is a risk of leakage at the position of the step-matching structure. In this solution, an annular protrusion 102 is provided in the first step-matching structure 310. In this way, after the two mating planes are assembled, the annular protrusion 102 on one plane can fully contact the other plane under pressure due to its small width, thereby achieving reliable sealing of the first step-matching structure 310. The sealing ring 340 is located between the outer wall of the circumferential side of the valve body 100 and the inner wall of the mounting hole. The sealing ring 340 can strengthen the firmness of the connection between the valve body 100 and the valve seat 200.

[0061] The valve body 100 includes a first body 150 and a second body 160 that are connected to each other. The end of the second body 160 extends into the first body 150 and is connected to the first body 150. The first body 150 and the second body 160 can be fixedly connected by interference fit or welded after interference fit. The sealing ring 340 is located on the circumferential outer wall of the first body 150. The circumferential outer wall in this article refers to the annular outer wall surrounding the entire circumference. A sealing member 170 is provided between the outer wall of the second body 160 and the valve seat 200. The sealing member 170 prevents the refrigerant from leaking from the valve cavity 201 to the outside of the valve seat 200 when the valve port is closed.

[0062] Or, as Figures 4 to 6 As shown, in the second embodiment, unlike the first embodiment, the valve body 100 includes a valve cover 110 and a pressure ring 140. The outer wall of the valve cover 110 and / or the inner wall of the mounting hole have an annular protrusion 102. The pressure ring 140 is sleeved on the valve cover 110 and has an interference fit with the valve cover 110. The pressure ring 140 and the valve cover 110 are axially limited. The pressure ring 140 has an external thread, and the inner wall of the mounting hole has an internal thread. The internal and external threads cooperate to form a threaded fitting structure 330. When tightened, the pressure ring 140 applies pressure to the valve cover 110. During assembly, tightening the pressure ring 140 applies a force toward the valve cavity 201 to the valve cover 110, thereby applying pressure to the annular protrusion 102, compressing the annular protrusion 102 and achieving a seal. After the interference fit, the valve cover 110 and the pressure ring 140 are assembled into a single unit, which is threadedly connected to the inner wall of the mounting hole via the threaded fitting structure 330.

[0063] like Figures 7 to 11 As shown, different from the above embodiments, in embodiment three, the outer wall of the valve body 100 and the inner wall of the mounting hole also constitute a second step matching structure 320, and the first step matching structure 310 and the second step matching structure 320 are arranged at intervals along the axial direction of the mounting hole; wherein, the second step matching structure 320 has an annular protrusion 102 or the second step matching structure 320 has no annular protrusion 102.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] Among them, there is also a threaded matching structure 330 between the outer wall of the valve body 100 and the inner wall of the mounting hole. The threaded matching structure 330, the first step matching structure 310, the second step matching structure 320, the sealing ring 340, and the valve cavity 201 are arranged in sequence, or the sealing ring 340, the first step matching structure 310, the second step matching structure 320, the threaded matching structure 330, and the valve cavity 201 are arranged in sequence.

[0068] During the process of tightening or loosening the threads, debris will be generated between the internal threads and the external threads due to processing errors and friction, and external debris may also enter the gap between the internal threads and the external threads. In the prior art, the debris between the internal threads and the external threads will 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.

[0069] In this solution, the above two settings separate the threaded mating structure 330 and the sealing ring 340, preventing debris from entering the position of the sealing ring 340 from the threaded mating structure 330, thereby preventing the debris from affecting the sealing performance of the sealing ring 340.

[0070] like Figure 8 and Figure 9 As shown, there is also a threaded matching structure 330 between the outer wall of the valve body 100 and the inner wall of the mounting hole, and the threaded matching structure 330, the first step matching structure 310, and the sealing ring 340 are arranged in sequence; a cavity is formed between the outer wall of the valve body 100 and the inner wall of the mounting hole, and the cavity is located between the first step matching structure 310 and the threaded matching structure 330, and a receiving groove 203 is provided in the cavity.

[0071] In this way, when debris in the threaded matching structure 330 falls, 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 step matching structure 310, thereby further preventing the debris from entering the position where the sealing ring 340 is located.

[0072] 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.

[0073] 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.

[0074] like Figures 8 to 11 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.

[0075] 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.

[0076] Alternatively, in other embodiments, 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.

[0077] 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.

[0078] 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.

[0079] like Figure 10As 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.

[0080] 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.

[0081] 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 .

[0082] like Figure 7 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.

[0083] 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.

[0084] The above description is merely an optional embodiment of the present invention and is not intended to limit the present invention. Persons skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

[0085] 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.

[0086] 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.

[0087] 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.

[0088] 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.

[0089] manual PN285147DUNANRG

[0090] 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: include: A valve body (100) and a valve seat (200), wherein the valve seat (200) has a mounting hole and a valve cavity (201), the valve body (100) is detachably mounted on the mounting hole, an outer wall of the valve body (100) and / or an inner wall of the mounting hole have an annular protrusion (102), and the outer wall of the valve body (100) and the inner wall of the mounting hole are sealed by the annular protrusion (102); A fixed connection structure and a sealing ring (340) are provided between the outer wall of the valve body (100) and the inner wall of the mounting hole and are spaced apart in the axial direction; Wherein, the annular protrusion (102), the sealing ring (340) and the valve cavity (201) are arranged in sequence.

2. The electric valve according to claim 1, characterized in that The valve body (100) includes a valve cover (110), and the valve cover (110) is detachably mounted on the mounting hole, wherein: The valve cover (110) has the annular protrusion (102), and the hardness of the valve cover (110) is greater than the hardness of the valve seat (200); Or the valve seat (200) has the annular protrusion (102), and the hardness of the valve seat (200) is greater than the hardness of the valve cover (110).

3. The electric valve according to claim 1, characterized in that There are multiple annular protrusions (102), and the multiple annular protrusions (102) are distributed in the radial direction and / or axial direction of the mounting hole.

4. The electric valve according to claim 1, characterized in that The radial cross section of the annular protrusion (102) is triangular, rectangular, trapezoidal or arcuate.

5. The electric valve according to claim 1, characterized in that The fixed connection structure is a threaded fitting structure (330), and the threaded fitting structure (330) is provided between the outer wall of the valve body (100) and the inner wall of the mounting hole. The annular protrusion (102) is located between the threaded fitting structure (330) and the sealing ring (340). After being tightened, the threaded fitting structure (330) applies a pressing force to the annular protrusion (102).

6. The electric valve according to claim 5, characterized in that: The valve body (100) includes a valve cover (110), the outer wall of the valve cover (110) and / or the inner wall of the mounting hole have the annular protrusion (102), the valve cover (110) has an external thread, and the inner wall of the mounting hole has an internal thread, and the internal thread and the external thread cooperate to form the threaded cooperation structure (330).

7. The electric valve according to claim 5, characterized in that The valve body (100) includes a valve cover (110) and a pressure ring (140), the outer wall of the valve cover (110) and / or the inner wall of the mounting hole have the annular protrusion (102), the pressure ring (140) is sleeved on the valve cover (110) and has an interference fit with the valve cover (110), and the pressure ring (140) and the valve cover (110) are axially limited, the pressure ring (140) has an external thread, and the inner wall of the mounting hole has an internal thread, the internal thread and the external thread cooperate to form the threaded fitting structure (330), and the pressure ring (140) applies pressure to the valve cover (110) after being tightened.

8. The electric valve according to any one of claims 1 to 7, characterized in that: The sealing ring (340) is located between the peripheral outer wall of the valve body (100) and the inner wall of the mounting hole.

9. The electric valve according to any one of claims 1 to 7, characterized in that: The valve body (100) includes a first body (150) and a second body (160) connected to each other, the end of the second body (160) extends into the first body (150) and is connected to the first body (150), and the sealing ring (340) is located on the outer wall of the first body (150); a sealing member (170) is provided between the outer wall of the second body (160) and the valve seat (200).

10. The electric valve according to claim 1, characterized in that The outer wall of the valve body (100) and the inner wall of the mounting hole form a first step matching structure (310), and the first step matching structure (310) has the annular protrusion (102).

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