Electric valve

Abstract

The electric valve comprises a valve port seat and a valve element component, the valve port seat is provided with an abutting face and a through hole, and the valve element component comprises a plugging part and an extending part; the extending part can extend into or be drawn out of the through hole, and the electric valve at least comprises a first working state and a second working state; in the first working state, the blocking part abuts against the abutting face, and the through hole is blocked by the valve element component. And in the second working state, the valve element component opens the through hole, the flow area formed between the blocking part and the abutting face is defined as the first flow area, the flow area formed between the extending part and the wall forming the through hole is defined as the second flow area, and the second flow area is smaller than the first flow area. And the flow adjusting precision is improved.

Description

[0001] This application claims the priority of the invention patent application filed with the China Patent Office on September 28, 2023, with application number 202311276451.3 and name “Electric Valve”, all contents of which are incorporated by reference in this application. Technical Field

[0003] The present application relates to the field of fluid control technology, and in particular to an electric valve. Background Art

[0004] The electric valve includes a valve seat and a valve core component. The valve core component can move relative to the matching surface of the valve seat to close the through hole or adjust the flow of the through hole. In the related art, a fluid path is formed between the matching surface of the valve seat and the valve core component. In the early stage of valve opening, the flow rate changes greatly when the valve core component moves one unit, thereby affecting the flow rate adjustment accuracy. Summary of the invention

[0005] One object of the present application is to provide an electric valve that can improve the regulation accuracy of flow.

[0006] To achieve the above purpose, an implementation method of the present application adopts the following technical solution:

[0007] An electric valve comprises a valve seat and a valve core component, the valve seat having an abutment surface and a through hole, the valve core component comprising a blocking portion and an extension portion; the extension portion can be extended into or withdrawn from the through hole, and the electric valve comprises at least a first working state and a second working state; in the first working state, the blocking portion abuts against the abutment surface, and the valve core component blocks the through hole; in the second working state, the valve core component opens the through hole, and a flow area formed between the blocking portion and the abutment surface is defined as a first flow area, and a flow area formed between the extension portion and the wall forming the through hole is defined as a second flow area, and the second flow area is smaller than the first flow area.

[0008] In an embodiment provided by the present application, in the first working state, the blocking portion abuts against the abutting surface, and the valve core component blocks the through hole; in the second working state, the valve core component opens the through hole, and the flow area formed between the blocking portion and the abutting surface is defined as the first flow area, and the flow area formed between the protruding portion and the wall forming the through hole is defined as the second flow area, and the second flow area is smaller than the first flow area. In this way, since the second flow area is smaller than the first flow area in the second working state, the flow change caused by the valve core component moving one unit is smaller, thereby improving the flow regulation accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1It is a three-dimensional structural schematic diagram of the electric valve provided by the present application;

[0010] Figure 2 yes Figure 1 A structural diagram of the electric valve from one perspective;

[0011] Figure 3 yes Figure 2 The cross-sectional structure diagram of the electric valve along the AA plane;

[0012] Figure 4 yes Figure 3 A partial enlarged view of the middle part;

[0013] Figure 5 yes Figure 3 Schematic diagram of the combination of the middle valve core component and the valve seat;

[0014] Figure 6 yes Figure 5 Sectional view of the middle valve core component and valve seat;

[0015] Figure 7 yes Figure 6 Schematic diagram of the cross-section of the middle valve core component and the valve seat;

[0016] Figure 8 yes Figure 3 A structural schematic diagram of the first working state of the electric valve;

[0017] Fig. 9 yes Figure 3 A structural schematic diagram of the second working state of the electric valve;

[0018] Fig.10 yes Figure 3 Schematic diagram of the initial state of the middle valve needle seat opening the valve;

[0019] Fig.11 yes Fig.10 A partial enlarged view of point B in the middle;

[0020] Fig.12 yes Figure 3 Flow rate regulation curve corresponding to the middle valve needle seat and the through hole structure;

[0021] Fig.13 It is a schematic diagram of the three-dimensional structure of an embodiment of the electric valve provided in the present application.

[0022] Description of Figure Numbers:

[0023] 100, electric valve; 11, valve seat body; 111, connecting seat; 1111, liquid inlet; 1112, first limiting groove; 112, first valve seat; 1121, liquid outlet; 1122, second limiting groove; 113, second valve seat; 1131, valve seat portion; 1132, inner boss; 1133, outer boss; 12, valve port seat; 121, through hole; 122, hole wall; 123, abutment surface; 124, connecting wall; 13, valve Core component; 131, spacing groove; 132, sealing part; 133, insertion part; 20, nut assembly; 21, nut body; 211, nut sleeve; 212, elastic member; 213, shell; 214, connecting panel; 22, screw; 23, fastening mechanism; 231, support member; 232, limiting member; 24, rotor mechanism; 241, magnet; 242, groove; 30, coil assembly; 31, stator mechanism; 40, valve body. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0025] Figures 1 to 11An embodiment of an electric valve 100 is illustrated. The electric valve 100 includes a valve seat 12 and a valve core component 13. The valve seat 12 has an abutting surface 123 and a through hole 121 penetrating the valve seat 12. The valve core component 13 includes a blocking portion 132 and an insertion portion 133. The valve core component 13 can block or open the through hole 121. Specifically, the insertion portion 133 can be inserted into or withdrawn from the through hole 121. The insertion portion 133 can move relative to the through hole 121 to achieve precise regulation of the flow rate. The electric valve 100 includes at least a first working state and a second working state. It should be noted that the first working state represents a state of blocking the through hole 121, and the second working state represents a state of opening the through hole 121. In the first working state, the blocking portion 132 abuts against the abutting surface 123, and the valve core component 13 blocks the through hole 121. In the second working state, the valve core component 13 opens the through hole 121, and the flow area formed between the blocking portion 132 and the abutting surface 123 is defined as the first flow area, and the flow area formed between the extending portion 133 and the wall forming the through hole 121 is defined as the second flow area, and the second flow area is smaller than the first flow area. It should be noted that, since in the second working state, the second flow area is smaller than the first flow area, the second flow area can reduce the flow area of ​​the working medium relative to the first flow area, so that the flow change caused by the valve core component moving one unit is smaller, thereby improving the flow regulation accuracy. In this embodiment, the axial direction of the electric valve 100 is defined, and the axial direction of the electric valve 100 is parallel to the movement direction of the valve core component 13.

[0026] Combination Figures 3 to 11As shown, in some embodiments, the blocking portion 132 is located at the periphery of the through hole 121, and the wall forming the through hole 121 includes a connecting wall 124, and the connecting wall 124 is set to expand in diameter toward the blocking portion 132 along the axial direction of the electric valve 100; in the second working state, the valve core component 13 opens the through hole 121, and a radial gap is set between the insertion portion 133 and the connecting wall 124. It should be noted that the second working state also includes the initial state of valve opening, and the initial state of valve opening means that in the process of the blocking portion 132 gradually moving away from the abutting surface 123, the bottom surface of the insertion portion 133 has not yet left the plane where the abutting surface 123 is located. In other words, at this stage, part of the insertion portion 133 is still located in the through hole 121. Specifically in the structure, the connecting wall 124 can cooperate with the protruding portion 133, the second flow area can be gradually and stably increased, and the flow rate can be prevented from suddenly fluctuating greatly when the protruding portion 133 leaves the plane where the abutting surface 123 is located to a certain extent, so that the flow rate change in the early stage of valve opening is smaller, thereby improving the flow rate regulation accuracy. In this embodiment, the wall forming the through hole 121 also includes the hole wall 122, and the connecting wall 124 is adjacent to the hole wall 122 and the abutting surface 123 respectively. Along the axial direction of the electric valve 100, the hole wall 122 is away from the blocking portion 132 relative to the connecting wall 124, and the hole wall 122 extends downward from the connecting wall 124 along the axial direction of the electric valve 100.

[0027] In some embodiments, the blocking portion 132 protrudes toward the abutting surface 123, and / or the abutting surface 123 protrudes toward the blocking portion 132. It can be understood that when the blocking portion 132 protrudes toward the abutting surface 123, the abutting surface 123 can protrude toward the blocking portion 132, and the abutting surface 123 can also be a planar structure; correspondingly, when the abutting surface 123 protrudes toward the blocking portion 132, the blocking portion 132 can protrude toward the abutting surface 123, and the blocking portion can also be a planar structure. Regardless of which of the blocking portion 132 and the abutting surface 123 is a protruding structure, as long as the blocking portion 132 cooperates with the abutting surface 123 to achieve a blocking effect on the outer ring of the through hole 121.

[0028] Specifically, in this embodiment, the blocking portion 132 protrudes toward the valve seat 12, the abutting surface 123 is located at the valve seat 12, the abutting surface 123 is a planar structure, and the connecting wall 124 is adjacent to the hole wall 122, which plays a certain guiding role in the flow of the working medium into the through hole 121. Since the blocking portion 132 protrudes from the valve core component 13 toward the valve seat 12, it means that when the valve core component 13 moves up and down along the axial direction of the electric valve 100, the blocking portion 132 contacts the valve seat 12 first.

[0029] In this embodiment, the wall forming the through hole 121 is cylindrical, the abutment surface 123 is located on the valve seat 12 and adjacent to the connecting wall 124, the extension direction of the abutment surface 123 is perpendicular to the direction of the valve core component 13, and the axial extension direction of the hole wall 122 is perpendicular to the radial extension direction of the abutment surface 123.

[0030] It should be noted that the directional words such as up, down, left, right, front, and back mentioned in this specification are based on the directions in red in the drawings of the specification, and are only for the convenience of describing the present application 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 application.

[0031] It should be noted that, in this embodiment, the blocking portion 132 can contact or separate from the abutting surface 123. When the valve core component 13 separates from the valve seat 12, the blocking portion 132 moves away from the abutting surface 123. At this time, the through hole 121 is opened, and the working medium first passes through the first flow area, and then is guided to the second flow area through the extension portion 133 and finally flows into the through hole 121. It should be explained that when the working medium passes through the first flow area, the flow area of ​​the working medium is larger than the flow area of ​​the second flow area. Since the flow rate of the through hole 121 mainly depends on the flow area at the smallest diameter, the flow rate at the through hole 121 in this embodiment mainly depends on the flow area of ​​the second flow area; when the working medium flows into the second flow area, since the second flow area relatively reduces the flow area of ​​the working medium, and the extension portion 133 can cooperate with the connecting wall 124, when the extension portion 133 is gradually lifted upward, the flow area of ​​the working medium is relatively slowly increased, thereby improving the flow rate regulation accuracy. Compared with the situation where the valve core component 13 directly opens the through hole 121 and suddenly increases the flow area of ​​the working medium, the flow rate can be adjusted more evenly.

[0032] Please refer to Fig.12 , Fig.12 The horizontal axis in represents the number of pulses (P). Fig.12 The ordinate in represents the flow rate (Q), and the number of pulses (P) is proportional to the distance between the valve core component 13 and the valve seat 12. The flow rate of the present invention is continuously improved as the number of pulses increases. It can be seen from the figure that at the initial stage of valve opening, the flow curve of the present embodiment is more gentle than that of the related art, and the flow rate change corresponding to the unit number of pulses is more uniform. The present invention can improve the problem of large fluctuations in the flow rate at the initial stage of valve opening of the through hole 121, improve the throttling performance of the electric valve, make the flow rate change smaller at the initial stage of valve opening, and thus improve the flow rate regulation accuracy.

[0033] It should be noted that the working medium in this embodiment is preferably but not limited to refrigerant, such as R134a, R1234yf.

[0034] It should be noted that in the present embodiment, the blocking portion 132 protrudes toward the abutting surface 123, and accordingly, the abutting surface 123 is located at the valve seat 12. Specifically, the abutting surface 123 and the valve seat 12 are an integral structure. In this case, the valve seat 12 can be made of a general plastic material as a whole, preferably polytetrafluoroethylene (PTFE), wherein polytetrafluoroethylene (PTFE) has both hardness and elasticity, and can well improve the sealing effect. Of course, the valve seat 12 can also be made of a mixture of polytetrafluoroethylene and other materials or other materials that have both hardness and elasticity, and no specific restrictions are made here.

[0035] It is also understandable that the valve seat 12 may also be at least partially made of polytetrafluoroethylene (PTFE), as long as it can cooperate with the blocking portion 132 to achieve a sealing effect.

[0036] In this embodiment, along the axial direction of the electric valve 100, the size of the blocking portion 132 is smaller than the size of the insertion portion 133. When the blocking portion 132 leaves the abutment surface 123, at least part of the insertion portion 133 is located in the through hole 121. In this way, when the blocking portion 132 leaves the abutment surface 123, the insertion portion 133 can still cooperate with the connecting wall 124, thereby improving the flow rate regulation accuracy. When the blocking portion 132 abuts against the abutment surface 123, at least part of the insertion portion 133 is located in the through hole 121. At this time, the blocking portion 132 is in close contact with the abutment surface 123, so that the working medium cannot flow directly from the through hole 121, thus playing a certain sealing role. Specifically, the size in this embodiment can be height or length, etc.

[0037] More specifically, in this embodiment, the blocking portion 132 has an arc surface (not shown in the figure), which is located on the side of the blocking portion 132 relative to the valve core component 13 close to the abutment surface 123, and the arc surface cooperates with the abutment surface 123 to achieve blocking of the through hole 121. It can be understood that when the valve core component 13 blocks the through hole 121 relative to the valve seat 12, the arc surface is in close contact with the wall forming the through hole 121, thereby improving the sealing effect.

[0038] Please refer to Figure 3 , Figure 4 , Figures 6 to 11, along the radial direction of the electric valve 100, the blocking portion 132 and the extending portion 133 are arranged at intervals, the blocking portion 132 is located at the outer periphery of the extending portion 133, the connecting wall 124 is located between the blocking portion 132 and the extending portion 133, the diameter of the extending portion 133 is R1, and the diameter of the blocking portion 132 is R2. In other words, the blocking portion 132 is arranged at the outer side of the bottom of the valve core component 13, and the extending portion 133 is arranged at the inner side of the bottom of the valve core component 13. When the valve core component 13 opens the through hole 121 relative to the valve seat 12, the refrigerant flows to the extending portion 133 through the first flow area, and the extending portion 133 guides the refrigerant to the second flow area and finally flows smoothly into the through hole 121.

[0039] In some embodiments, the valve core component 13 has a spacing groove 131, and along the radial direction of the valve core component 13, the spacing groove 131 is located between the blocking portion 132 and the extending portion 133. Specifically, the spacing groove 131 is located between the blocking portion 132 and the extending portion 133, and such a configuration facilitates processing of the blocking portion 132 and the extending portion 133.

[0040] Specifically, the connecting wall 124 is connected to the hole wall 122 and the abutting surface 123 respectively, and the connecting wall 124 is set to expand in diameter from the hole wall 122 toward the abutting surface 123. It should be explained that such a setting can, on the one hand, enable the refrigerant passing through the gap between the blocking portion 132 and the abutting surface 123 to flow smoothly into the through hole 121, thereby achieving a certain transition effect; on the other hand, when the insertion portion 133 is inserted into the through hole 121, the connecting wall 124 cooperates with the insertion portion 133 through the gap to prevent the insertion portion 133 from being stuck in the through hole 121. It can be understood that in this embodiment, the connecting wall 124 is inclined from the hole wall 122 to the blocking portion 132, and the extension direction of the connecting wall 124 has an angle greater than zero with the radial direction of the valve core component 13, wherein the angle between the extension direction of the connecting wall 124 and the radial direction of the valve core component 13 can be adjusted according to actual conditions, and the larger the angle, the faster the flow changes on the basis of the same number of pulse steps, and the smaller the angle between the extension direction of the connecting wall 124 and the radial direction of the valve core component 13, the smoother the flow changes. It is worth noting that the above-mentioned angle needs to be between 0 degrees and 90 degrees (excluding 0 degrees and 90 degrees). In this embodiment, the preferred range of the angle is between 15 degrees and 45 degrees, at which time the flow changes more evenly.

[0041] In this embodiment, the connecting wall 124 is preferably a conical surface. Optionally, in other embodiments, the connecting wall 124 may also be a curved surface or other irregular shaped surfaces, as long as the connecting wall 124 meets the premise of expanding the diameter from the through hole 121 to the blocking portion 132 .

[0042] In addition, it can be understood that when the valve core component 13 moves upward relative to the valve seat 12, the through hole 121 is in an open state. Due to the clearance fit between the connecting wall 124 and the extension portion 133, the valve seat body 11 can smoothly leave the through hole 121; when the valve seat body 11 moves downward relative to the valve seat 12, the extension portion 133 blocks the through hole 121. At this time, the connecting wall 124 plays a certain guiding role in the downward movement of the extension portion 133, so that the extension portion 133 can more smoothly extend into the through hole 121 and block the through hole 121.

[0043] Specifically, the protruding portion 133 is in clearance with the wall forming the through hole 121. Such a configuration can reduce the situation where the protruding portion 133 is stuck in the through hole 121.

[0044] In addition, the terms "first" and "second" in this specification are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0045] Combination Figures 1 to 6 As shown, in some embodiments, the electric valve 100 also includes a valve seat body 11, which has a liquid inlet 1111 and a liquid outlet 1121. When the valve core component 13 opens the through hole 121, the through hole 121 is connected to the liquid inlet 1111 and the liquid outlet 1121 respectively.

[0046] In this embodiment, the valve seat body 11 includes a first valve seat 112 and a connecting seat 111. The first valve seat 112 is fixedly connected to the connecting seat 111. The liquid inlet 1111 is located on the connecting seat 111. The number of the liquid inlets 1111 is multiple, and the multiple liquid inlets 1111 are arranged around the connecting seat 111. The liquid outlet 1121 is located on the first valve seat 112. When the valve core component 13 opens the through hole 121, the through hole 121 is connected to the liquid inlet 1111 and the liquid outlet 1121 respectively. Specifically, the first valve seat 112 is fixedly connected to the connecting seat 111. The fixed connection method includes but is not limited to welding, riveting, etc. The connecting seat 111 is an integrated structure. Along the radial direction of the valve core component 13, the connecting seat 111 abuts or has a clearance fit with the valve core component 13. Along the radial direction of the valve core component 13, the connecting seat 111 abuts or has a clearance fit with the valve port seat 12. It is understandable that during the operation of the electric valve 100, the liquid inlet 1111 can be used as the inlet of the refrigerant, and the liquid outlet 1121 can be used as the outlet of the refrigerant. Conversely, in other embodiments, the liquid inlet 1111 can also be used as the outlet of the refrigerant, and the liquid outlet 1121 can also be used as the inlet of the refrigerant.

[0047] Optionally, in some embodiments, the connecting wall 124 can also be located at the protruding portion 133, and the protruding portion 133 cooperates with the hole wall 122 to adjust the flow rate. In this embodiment, the liquid inlet 1111 serves as the outlet of the refrigerant, and the liquid outlet 1121 serves as the inlet of the refrigerant. It can be understood that as long as the flow area between the first flow area and the second flow area is different, the flow rate can be simply adjusted. Specifically, the protruding portion 133 cooperates with the hole wall 122 to slowly increase the flow area of ​​the working medium, thereby improving the adjustment accuracy of the flow rate. Further, the first valve seat 112 has a second limiting groove 1122 facing the direction of the valve seat 12, and the connecting seat 111 has a first limiting groove 1112 facing the direction of the valve seat 12, and the first limiting groove 1112 and the second limiting groove 1122 cooperate to limit the valve seat 12 in the radial direction. It should be noted that the use of the integrally structured connecting seat 111 to radially limit the valve port seat and the valve core component 13 makes the valve core component 13 and the valve port seat 12 more accurately aligned.

[0048] In this embodiment, the nut assembly 20 includes a nut body 21 and a screw 22, one end of the screw 22 is drivingly connected to the valve core component 13, and the other end of the screw 22 is threadedly matched with the nut body 21, which is used to drive the screw 22 to rotate and block or open the through hole 121 through the valve core component 13. Specifically, the nut body 21 is threadedly matched with the screw 22, which is used to drive the screw 22 to rotate so that the screw 22 moves along the axial direction of the screw 22. When the screw 22 moves upward, the valve core component 13 can open the through hole 121, and when the screw 22 moves downward, the valve core component 13 can block the through hole 121.

[0049] In some embodiments, the nut body 21 includes a nut sleeve 211, the nut sleeve 211 has an internal threaded portion, and the screw 22 has an external threaded portion, and the external threaded portion and the internal threaded portion are threadedly matched. It should be noted that when the screw 22 rotates, the screw 22 converts the rotation of the screw 22 into axial motion through the cooperation between the external threaded portion and the internal threaded portion, and then drives the valve core component 13 to move up and down through the screw 22.

[0050] Specifically, the nut sleeve 211 includes a mounting portion (not shown in the figure) and an extension portion (not shown in the figure), the extension portion extends from the mounting portion away from the valve core component 13, and the internal thread portion is provided in the extension portion. In this embodiment, the extension portion is coaxially matched with the screw rod 22, so that the screw rod 22 can be movably connected to the extension portion.

[0051] Optionally, the extension portion and the mounting portion may be an integral structure. In other embodiments, the extension portion and the mounting portion may also be a detachably connected split structure, as long as the screw rod 22 can pass through the mounting portion and can be threadedly matched with the extension portion.

[0052] The nut body 21 also includes an elastic member 212, one end of the elastic member 212 abuts against the valve core component 13, and the other end of the elastic member 212 abuts against the nut sleeve 211. Since the elastic member 212 always maintains a compressed state, the elastic member 212 elastically pushes the valve core component 13 and the nut sleeve 211 so that the external threaded portion located on the lower side fits with the internal threaded portion located on the lower side. Optionally, the elastic member 212 in the present application can be but is not limited to a spring, an elastic material, or a structure with a similar function to a spring. The elastic member 212 in this embodiment is preferably a spring. In other embodiments, part of the elastic member 212 can also be sleeved on the outer periphery of the screw 22, as long as the elastic member 212 is in a compressed state.

[0053] In some embodiments, the valve seat body 11 also includes a second valve seat 113, and the nut body 21 also includes a shell 213 and a connecting panel 214. The connecting panel 214 is fixedly connected to the second valve seat 113 and the nut sleeve 211 respectively. The fixed connection method includes but is not limited to welding, riveting, etc. The second valve seat 113 includes a valve seat portion 1131, an inner boss 1132 and an outer boss 1133. The inner boss 1132 extends from the valve seat portion 1131 toward the shell 213; the inner boss 1132 is respectively fitted with the inner wall of the shell 213 and the outer wall of the nut sleeve 211, and one end of the inner boss 1132 facing away from the outer boss 1133 is abutted against the connecting panel 214; the outer boss 1133 extends from the valve seat portion 1131 away from the inner boss 1132, and the outer boss 1133 is fitted with the outer wall of the connecting seat 111. It should be noted that one end of the elastic member 212 is at least partially sleeved on the top of the valve core component 13, and the other end of the elastic member 212 is in contact with the bottom of the mounting portion. Further, the first valve seat 112 and the second valve seat 113 are respectively fixedly connected to the connecting seat 111, and the fixed connection method includes but is not limited to welding, riveting, etc.

[0054] Please also read Figure 1 Figure 2 , Figure 3 and Fig.13The nut assembly 20 further includes a rotor mechanism 24 and a fastening mechanism 23. The electric valve 100 further includes a coil assembly 30 and a valve body 40. The valve body 40 is sleeved on the outer periphery of the valve seat body 11 and is fixedly connected to the coil assembly 30. The coil assembly 30 includes a stator mechanism 31. The stator mechanism 31 is sleeved on the outer ring of the rotor mechanism 24. The fastening mechanism 23 is fixedly connected to the rotor mechanism 24 and the screw 22 respectively. The stator mechanism 31 is drivingly connected to the rotor mechanism 24 and drives the fastening mechanism 23 to rotate so that the screw 22 moves along the axial direction of the nut sleeve 211. It should be noted that since the fastening mechanism 23 is fixedly connected to one end of the screw 22, the rotor mechanism 24 drives the screw 22 to rotate through the fastening mechanism 23. The screw 22 is threadedly matched with the nut sleeve 211 so that the screw 22 can move up and down along the axial direction of the nut sleeve 211.

[0055] Specifically, the rotor mechanism 24 includes a magnet 241, the upper part of the magnet 241 has a groove 242, the fastening mechanism 23 includes a support member 231 and a limiting member 232, the limiting member 232 extends from the support member 231 in a direction away from the nut sleeve 211, the support member 231 is restricted in the groove 242, and the support member 231 cooperates with the limiting member 232 to limit the screw 22 along the axial direction of the screw 22, and the limiting effect is good. When the rotor mechanism 24 rotates, it can drive the screw 22 to rotate through the rotation of the support member 231.

[0056] It should be noted that the above embodiments are only used to illustrate the present application and are not intended to limit the technical solutions described in the present application. Although the present application has been described in detail in this specification with reference to the above embodiments, a person of ordinary skill in the art should understand that a person of ordinary skill in the art can still modify or make equivalent substitutions to the application, and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present application should be included in the scope of the claims of the present application.

Claims

1. An electric valve, comprising a valve seat (12) and a valve core component (13), wherein the valve seat (12) has an abutting surface (123) and a through hole (121), and the valve core component (13) comprises a blocking portion (132) and an extending portion (133); the extending portion (133) can extend into or be withdrawn from the through hole (121), and the electric valve comprises at least a first working state and a second working state; In the first working state, the blocking portion (132) abuts against the abutting surface (123), and the valve core component (13) blocks the through hole (121); In the second working state, the valve core component (13) opens the through hole (121), and defines the flow area formed between the blocking portion (132) and the abutting surface (123) as the first flow area, and defines the flow area formed between the extending portion (133) and the wall forming the through hole (121) as the second flow area, and the second flow area is smaller than the first flow area.

2. The electric valve according to claim 1, characterized in that: The blocking portion (132) is located at the outer periphery of the through hole (121), and the wall forming the through hole (121) includes a connecting wall (124), and along the axial direction of the electric valve, the connecting wall (124) is arranged to expand in diameter in the direction of the blocking portion (132); In the second working state, a radial gap is provided between the protruding portion (133) and the connecting wall (124).

3. The electric valve according to claim 2, characterized in that: The wall forming the through hole (121) also includes a hole wall (122), and the connecting wall (124) is adjacent to the hole wall (122) and the abutting surface (123) respectively. Along the axial direction of the electric valve, the hole wall (122) is away from the blocking portion (132) relative to the connecting wall (124), and the hole wall (122) extends from the connecting wall (124) along the axial direction of the electric valve.

4. The electric valve according to claim 3, characterized in that: The blocking portion (132) protrudes toward the abutting surface (123), and / or the abutting surface (123) protrudes toward the blocking portion (132).

5. The electric valve according to claim 3 or 4, characterized in that: The blocking portion (132) protrudes toward the valve seat (12), the abutting surface (123) is located on the valve seat (12), and the connecting wall (124) is adjacent to the hole wall (122).

6. The electric valve according to any one of claims 1 to 5, characterized in that: Along the axial direction of the electric valve, the size of the blocking portion (132) is smaller than the size of the extending portion (133); when the blocking portion (132) leaves the abutting surface (123), at least a portion of the extending portion (133) is located in the through hole (121).

7. The electric valve according to any one of claims 1 to 6, characterized in that: The blocking portion (132) has an arc surface, and the arc surface can cooperate with the abutting surface (123).

8. The electric valve according to any one of claims 2, 3 and 5, characterized in that: Along the radial direction of the electric valve, the blocking portion (132) and the extending portion (133) are arranged at intervals, the blocking portion (132) is located on the outer periphery of the extending portion (133), and the connecting wall (124) is located between the blocking portion (132) and the extending portion (133).

9. The electric valve according to claim 8, characterized in that: The valve core component (13) has a spacing groove (131), and along the radial direction of the valve core component (13), the spacing groove (131) is located between the blocking portion (132) and the extending portion (133).

10. The electric valve according to any one of claims 1 to 6, characterized in that: The electric valve further comprises a valve seat body (11), wherein the valve seat body (11) has a liquid inlet (1111) and a liquid outlet (1121), and when the valve core component (13) opens the through hole (121), the through hole (121) is respectively connected to the liquid inlet (1111) and the liquid outlet (1121).

11. The electric valve according to claim 10, characterized in that: The valve seat body (11) comprises a connecting seat (111), the liquid inlet (1111) is located on the connecting seat (111), the connecting seat (111) has a first limiting groove (1112), and at least a portion of the valve port seat (12) is located in the first limiting groove (1112); the connecting seat (111) is an integral structure, and along the radial direction of the valve core component (13), the connecting seat (111) and the valve core component (13) are in abutment or clearance fit, and along the radial direction of the valve core component (13), the connecting seat (111) and the valve port seat (12) are in abutment or clearance fit; the valve port seat (12) is an integral structure.

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