Electronic expansion valve

Abstract

According to the electronic expansion valve, a nut comprises an upper stop part, a lower stop part and a base part, the nut comprises a spiral guide groove, a stop assembly comprises a first part and a second part, the first part and a magnet are fixed or integrally formed or arranged in a limiting mode, and at least part of the second part is located in the spiral guide groove; the second part can move along the spiral guide groove, the stop assembly is driven to move through rotation of the magnet, and then the limiting effect is achieved through the upper stop part and the lower stop part of the nut, so that a sliding ring and a spring guide rail are omitted, the number of parts of the electronic expansion valve is smaller, and cost is reduced.

Description

Technical Field

[0001] The present application relates to the field of flow control, and in particular to an electronic expansion valve. Background Art

[0002] The current electronic expansion valve stopper includes a nut, a slip ring, a spring guide, a stopper rod, and a magnet. This electronic expansion valve has many parts and is relatively expensive. Therefore, how to reduce the number of parts of the electronic expansion valve stopper to reduce the cost needs to be considered. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides an electronic expansion valve capable of reducing costs.

[0004] An electronic expansion valve, comprising:

[0005] magnet;

[0006] A nut, wherein the magnet is sleeved on at least part of the nut, the nut comprises a base, an upper stopper, and a lower stopper, and the nut comprises a spiral guide groove, wherein the spiral guide groove is located on an outer wall of the base, and along a height direction of the base, the upper stopper is located on an upper side of the spiral guide groove, and the lower stopper is located on a lower side of the spiral guide groove;

[0007] A stop assembly, wherein the stop assembly includes a first part and a second part, wherein the first part and the second part are directly or indirectly fixed, wherein the first part is fixed to the magnet or is integrally formed or limitedly arranged, wherein at least a portion of the second part is located in the spiral guide groove, and the second part can move along the spiral guide groove, wherein the second part can abut against the upper stop part when it is on the upper side of the spiral guide groove, and can abut against the lower stop part when it is on the lower side of the spiral guide groove.

[0008] The above technical scheme has the following advantages: in this scheme, the nut includes a spiral guide groove, a base, an upper stop part, and a lower stop part, and the stop assembly includes a first part and a second part, the first part is fixed to the magnet or is integrally formed or limitedly set, at least part of the second part is located in the spiral guide groove, and the second part can move along the spiral guide groove, and the stop assembly is driven to move by the rotation of the magnet, and then the limiting effect is completed by the upper stop part and the lower stop part of the nut. Compared with the electronic expansion valve in the background technology, this scheme reduces the slip ring and the spring guide rail, so that the number of parts of the electronic expansion valve is reduced, and the cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a partial structural schematic diagram of an implementation mode of the present invention.

[0010] Figure 2 for Figure 1Schematic diagram of the top view of the nut and stop assembly used in.

[0011] Figure 3 for Figure 1 Axonometric diagram of the nut and stop assembly used in.

[0012] Figure 4 It is a partial structural schematic diagram of another embodiment of the present invention.

[0013] Figure 5 It is a structural schematic diagram of an embodiment of a nut of the present invention.

[0014] Figure 6 for Figure 5 The diagram shown is a partial enlarged structural diagram of the nut at the upper stop portion.

[0015] Figure 7 It is a partial structural schematic diagram of another embodiment of the present invention, which illustrates the matching relationship between the nut and the stop component.

[0016] Figure 8 for Figure 7 Schematic diagram of the top view structure.

[0017] Fig. 9 for Figure 7 A cross-sectional view of the cooperation of the nut, magnet, and stop member in the illustrated embodiment.

[0018] Fig.10 for Fig. 9 Cross-sectional diagram of .

[0019] Fig.11 It is a partial structural schematic diagram of another embodiment of the present invention, in which the main body of the magnet is hidden.

[0020] Fig.12 for Fig.11 A schematic side view of a portion of the structure of the embodiment shown.

[0021] Reference numerals:

[0022] 1 magnet, 10 main body, 11 limit groove, 111 notch, 112 open end, 12 abutment portion, 2 nut, 20 base, 21 spiral guide groove, 211 upper stop portion, 212 lower stop portion, 22 first stop plate, 221 fixed section, 222 buffer section, 23 second stop plate, 3 stop assembly, 31 first part, 311 stop rod, 3111 connecting part, 3112 pushing part, 32 second part, 321 stop half ring, 322 stop needle, 323 stop ring, 33 elastic part DETAILED DESCRIPTION

[0023] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0024] It should be clear that the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application. The up and down, front and back in the following description are based on the height direction and length direction marked in the figure.

[0025] An electronic expansion valve, the electronic expansion valve comprising:

[0026] Magnet 1;

[0027] The nut 2, the magnet 1 is sleeved on at least part of the nut 2, the nut 2 includes a base 20, an upper stopper 211, and a lower stopper 212, the nut 2 includes a spiral guide groove 21, the spiral guide groove 21 is located on the outer wall of the base 20, along the height direction of the base 20, the upper stopper 211 is located on the upper side of the spiral guide groove 21, and the lower stopper 212 is located on the lower side of the spiral guide groove 21;

[0028] The stop assembly 3 includes a first part 31 and a second part 32, the first part 31 and the second part 32 are directly or indirectly fixed, the first part 31 is fixed to the magnet 1 or is integrally formed or limited, at least part of the second part 32 is located in the spiral guide groove 21, and the second part 32 can move along the spiral guide groove 21, the second part 32 can abut against the upper stop part 211 when it is on the upper side of the spiral guide groove 21, and the second part 32 can abut against the lower stop part 212 when it is on the lower side of the spiral guide groove 21; the magnet 1 drives the first part 31 to move, the first part 31 drives the second part 32 to move, the second part 32 stops moving after moving to the upper stop part 211 to complete the upper stop function, and the second part 32 stops moving after moving to the lower stop part 212 to complete the lower stop function. This solution does not use slip rings and spring guide rails, has a simple structure, is easy to assemble, and reduces production costs.

[0029] like Figure 1-Figure 3 As shown, Figure 1 An embodiment of an electronic expansion valve is shown schematically, which includes at least a magnet 1, a coil (not shown) arranged outside the magnet 1, and when the coil is energized, the rotation of the magnet 1 is controlled. The rotation speed and the switch of the magnet 1 can be controlled by controlling the current size of the external coil and the switch.

[0030] The electronic expansion valve includes a nut 2, which includes a base 20, an upper stop 211, and a lower stop 212. The nut 2 includes a spiral guide groove 21, which is located on the outer wall of the base 20. Along the height direction of the base 20, the upper stop 211 is located on the upper side of the spiral guide groove 21, and the lower stop 212 is located on the lower side of the spiral guide groove 21. The nut 2 can be an injection-molded part, which has a base 20, a spiral guide groove 21, an upper stop 211, and a lower stop 212 after the injection molding is completed; in this embodiment, the spiral guide groove 21 is a groove with closed upper and lower ends formed on the outer wall of the nut 2, the upper stop 211 is the side wall corresponding to the upper side of the spiral guide groove 21, and the lower stop 212 is the side wall corresponding to the lower side of the spiral guide groove 21, and the upper and lower directions here are relative. Figure 1 In the height direction shown in .

[0031] The electronic expansion valve includes a screw (not shown in the figure), at least part of which is located inside the nut 2, the external thread of the screw cooperates with the internal thread inside the nut 2, and the upper part of the screw is fixed to the magnet 1, so that when the magnet 1 rotates, the screw will move in the height direction while performing a circular motion. The movement of the screw in the height direction can realize the size of the opening of the electronic expansion valve, which is used to adjust the flow through the valve port.

[0032] The electronic expansion valve includes a stop assembly 3, which includes a first part 31 and a second part 32. The first part 31 and the second part 32 are directly or indirectly fixed, the first part 31 is fixed to the magnet 1 or is integrally formed or limited, and the second part 32 is at least partially located in the spiral guide groove 21. When the magnet 1 rotates, it drives the first part 31 to rotate, and the first part 31 drives the second part 32. The second part 32 rotates in the spiral guide groove 21 and moves along the height direction. When the second part 32 moves to the upper stop part 211, it will abut against the upper stop part 211 to complete the upper limit, and when the second part 32 moves to the lower stop part 212, it will abut against the lower stop part 212 to complete the lower limit.

[0033] Reference Figure 1 The first part 31 is the stop rod 311, and the second part 32 is the stop half ring 321. The stop half ring 321 only refers to an incompletely closed part, not just a semicircular ring. The stop assembly 3 also includes an elastic part 33. One end of the stop rod 311 is connected to the outer arc of the stop half ring 321 through the elastic part 33. The inner arc of the stop half ring 321 is limited in the spiral guide groove 21. The other end of the stop rod 311 is fixed to or integrally formed with the magnet 1. The stop half ring 321 has higher reliability than a single contact point, and the stop assembly 3 is not easy to fall off from the nut 2.

[0034] Compared with the stopper device of a general electronic expansion valve, the present embodiment lacks two components, namely, the spring guide rail and the slip ring, so the number of parts is reduced, the installation is simpler, and the cost is reduced.

[0035] like Figure 5 , Figure 6 The upper stopper 211 includes a first stopper 22, and the lower stopper 212 includes a second stopper 23. The first stopper 22 and the second stopper 23 include a fixed section 221 and a buffer section 222. The fixed section 221 and the buffer section 222 are fixed or integrally formed. The fixed section 221 is fixed or limited or integrally formed with the nut 2. The buffer section 222 is located in the spiral guide groove 21, and a gap is left between the buffer section 222 and the wall portion corresponding to the spiral guide groove 21. The first stopper 22 and the spiral guide groove 21 are fixed or limited or integrally formed. The side wall corresponding to the upper side of the groove 21 is fixed or integrally formed, and the second stop plate 23 is fixed or integrally formed with the side wall corresponding to the lower side of the spiral guide groove 21. In this embodiment, the stop plate can be a bent steel sheet, and the buffer section 222 is located at the end of the spiral guide groove 21. When the second part 32 moves to the lower stop part 212 or the upper stop part 211, it will hit the buffer section 222. The buffer section 222 has a certain stroke, which can reduce the impact force, and the stop plate can be integrally injection molded with the nut 2, which is convenient for processing.

[0036] Reference Figure 4 , Figure 4 The structure of another embodiment of the electronic expansion valve is schematically shown. Figure 1 The embodiment is similar, wherein the first part 31 is the stop rod 311, the second part 32 is the stop needle 32, and the stop assembly 3 also includes an elastic part 33, one end of the stop rod 311 is connected to the stop needle 32 through the elastic part 33, the stop needle 32 is partially limited in the spiral guide groove 21, and the other end of the stop rod 311 is fixed to the magnet 1 or formed as one piece, the stop needle 32 and the stop rod 311 can be formed as one piece, and the elastic part 33 is an elastic part extending from the stop rod 311. In this embodiment, the elastic part 33 and the stop rod 311 are formed as one piece, and the diameter of the elastic part 33 is smaller than the diameter of the stop rod 311. The elastic part 33 configured in this way has a certain elasticity relative to the stop rod 311, which is convenient for the subsequent installation of the stop needle 32, and has a certain buffering effect to reduce the impact force when moving to the upper stop part 211 and the lower stop part 212. The stop rod 311, the elastic part 33, and the stop needle 32 are formed as one piece to reduce the cost.

[0037] In other embodiments, the nut 2 includes a base 20, an upper stop portion 211, and a lower stop portion 212. The nut 2 includes a spiral guide groove 21, which is located on the outer wall of the base 20. The spiral guide groove 21 is connected to the outside world on the upper side in the height direction, and is not connected to the outside world on the lower side in the height direction.

[0038] The upper stopper 211 includes a first stopper 22, and the lower stopper 212 includes a second stopper 23. The first stopper 22 and the second stopper 23 include a fixed section 221 and a buffer section 222. The fixed section 221 and the buffer section 222 are fixed or integrally formed. The fixed section 221 is fixed or limited or integrally formed with the nut 2. The buffer section 222 is located in the spiral guide groove 21, and a gap is left between the buffer section 222 and the wall portion corresponding to the spiral guide groove 21. The fixed section 221 of the second stopper 23 is fixed or integrally formed with the side wall corresponding to the lower side of the spiral guide groove 21. The buffer section 222 of the second stop piece 23 is located in the spiral guide groove 21, the fixed section 221 of the first stop piece 22 is fixed or integrally formed with the inner wall of the spiral guide groove 21, the buffer section 222 of the first stop piece 22 is located in the spiral guide groove 21, the first stop piece 22 is used to reduce the buffering of the first part 31 moving to the upper stop part 211 and also has a stopping function, the second stop piece 23 is used to reduce the buffering of the first part 31 moving to the lower stop part 212, the first stop piece 22 and the second stop piece 23 can be integrally formed with the nut 2, the processing is simple, and the production cost is reduced.

[0039] An installation method of the electronic expansion valve as described above, when installing the electronic expansion valve, first bend the stop half ring 321 to one side, then insert the nut 2 from above the nut 2, the nut 2 automatically recovers after passing the upper stop portion 211, and then rotate the magnet 1 to install it on the nut 2 to complete the installation.

[0040] like Figure 7-10 As shown, in another embodiment, the electronic expansion valve comprises:

[0041] The nut 2, the magnet 1 is sleeved on at least part of the nut 2, the nut 2 includes a base 20, an upper stopper 211, and a lower stopper 212, the nut 2 includes a spiral guide groove 21, the spiral guide groove 21 is located on the outer wall of the base 20, along the height direction of the base 20, the upper stopper 211 is located on the upper side of the spiral guide groove 21, and the lower stopper 212 is located on the lower side of the spiral guide groove 21;

[0042] Magnet 1, the notch 111 of the limiting groove 11 faces the nut 2, and the limiting groove 11 has an open end 112 on one side in the axial direction, and the open end 112 is located at the bottom of the magnet 1, and the limiting groove 11 extends upward from the lower end of the magnet 1, but the limiting groove 11 does not penetrate the entire magnet 1, and only extends upward from the lower end portion. After the external coil is energized, the magnet 1 is controlled to rotate, and the rotation of the magnet 1 can be controlled by controlling the current size of the external coil and the switch;

[0043] The electronic expansion valve includes a screw (not shown in the figure), at least part of which is located inside the nut 2, the external thread of the screw cooperates with the internal thread inside the nut 2, and the upper part of the screw is fixed to the magnet 1, so that when the magnet 1 rotates, the screw will move in the height direction while performing a circular motion. The movement of the screw in the height direction can realize the size of the opening of the electronic expansion valve, which is used to adjust the flow through the valve port.

[0044] The stop assembly 3 includes a first part 31 and a second part 32. The second part 32 is limited in the spiral guide groove 21, and the first part 31 is limited in the limiting groove 11. When the magnet 1 rotates, it drives the first part 31 to rotate, and the first part 31 drives the second part 32. The second part 32 rotates and moves axially in the spiral guide groove 21. When the second part 32 moves to the upper stop part 211, it will abut against the upper stop part 211 to complete the upper limit. When the second part 32 moves to the lower stop part 212, it will abut against the lower stop part 212 to complete the lower limit.

[0045] Compared with the stopper device of a general electronic expansion valve, the present embodiment lacks two components, namely, the spring guide rail and the slip ring, so the number of parts is reduced, the installation is simpler, and the cost is reduced.

[0046] The first part 31 is the stop rod 311, and the second part 32 is the stop ring 323. The stop ring 323 and one side of the stop rod 311 are fixed or integrally formed. The stop ring 323 is limited in the spiral guide groove 21 and can rotate along the spiral guide groove 21. The other side of the stop rod 311 is limited in the limiting groove 11. The stop ring 323 can be made into multiple spirals like a general slip ring. Multiple spirals can increase the reliability of the stop ring 323.

[0047] During installation, first install the stop ring 323 in the spiral guide groove 21 of the nut 2, then align the limit groove 11 and the stop rod 311 of the magnet 1 from above, and then complete the installation of the magnet 1. This way, the installation efficiency is high and the production efficiency is improved.

[0048] like Figure 5 , Figure 6The upper stopper 211 includes a first stopper 22, and the lower stopper 212 includes a second stopper 23. The first stopper 22 and the second stopper 23 include a fixed section 221 and a buffer section 222. The fixed section 221 and the buffer section 222 are fixed or integrally formed. The fixed section 221 is fixed or limited or integrally formed with the nut 2. The buffer section 222 is located in the spiral guide groove 21, and a gap is left between the buffer section 222 and the wall portion corresponding to the spiral guide groove 21. The first stopper 22 and the spiral guide groove 21 are fixed or limited or integrally formed. The side wall corresponding to the upper side of the groove 21 is fixed or integrally formed, and the second stop plate 23 is fixed or integrally formed with the side wall corresponding to the lower side of the spiral guide groove 21. In this embodiment, the stop plate can be a bent steel sheet, and the buffer section 222 is located at the end of the spiral guide groove 21. When the second part 32 moves to the lower stop part 212 or the upper stop part 211, it will hit the buffer section 222. The buffer section 222 has a certain stroke, which can reduce the impact force, and the stop plate can be integrally injection molded with the nut 2, which is convenient for processing.

[0049] In other embodiments, the electronic expansion valve includes a nut 2, the nut 2 includes a base 20, an upper stopper 211, and a lower stopper 212, the nut 2 includes a spiral guide groove 21, the spiral guide groove is located on the outer wall of the base 20, the spiral guide groove 21 is connected to the outside world on the upper side in the height direction, and the spiral guide groove 21 is not connected to the outside world on the lower side in the height direction; the upper stopper 211 includes a first stopper 22, the lower stopper 212 includes a second stopper 23, the first stopper 22 and the second stopper 23 include a fixed segment 221 and a buffer segment 222, the fixed segment 221 and the buffer segment 222 are fixed or integrally formed, the fixed segment 221 is fixed or limited or integrally formed with the nut 2, the buffer segment 222 is located in the spiral guide groove 21, and the buffer segment 22 2 and a gap is left between the wall portion corresponding to the spiral guide groove 21; the fixing section 221 of the second stopper 23 is fixed or integrally formed with the side wall corresponding to the lower side of the spiral guide groove 21, the buffer section 222 of the second stopper 23 is located in the spiral guide groove 21, the fixing section 221 of the first stopper 22 is fixed or integrally formed with the inner wall of the spiral guide groove 21, the buffer section 222 of the first stopper 22 is located in the spiral guide groove 21, the first stopper 22 is used to reduce the buffering of the first part 31 moving to the upper stopper 211 and has a stopping function, the second stopper 23 is used to reduce the buffering of the first part 31 moving to the lower stopper 212, the first stopper 22 and the second stopper 23 can be integrally formed with the nut 2, the processing is simple, and the production cost is reduced.

[0050] like Figure 11-Figure 12 In another embodiment, the electronic expansion valve comprises:

[0051] The nut 2, the magnet 1 is sleeved on at least part of the nut 2, the nut 2 includes a base 20, an upper stopper 211, and a lower stopper 212, the nut 2 includes a spiral guide groove 21, the spiral guide groove 21 is located on the outer wall of the base 20, along the height direction of the base 20, the upper stopper 211 is located on the upper side of the spiral guide groove 21, and the lower stopper 212 is located on the lower side of the spiral guide groove 21;

[0052] The magnet 1 comprises an abutment portion 12 and a main body portion 10, wherein the main body portion 10 is cylindrical, the abutment portion 12 extends along the radius of the main body portion 10 toward the center of the circle, the first portion 31 extends along the radius of the main body portion 10 toward the outside of the center of the circle, and the first portion 31 and the abutment portion 12 at least partially overlap in the circumferential direction;

[0053] The electronic expansion valve includes a screw (not shown in the figure), at least part of which is located inside the nut 2, the external thread of the screw cooperates with the internal thread inside the nut 2, and the upper part of the screw is fixed to the magnet 1, so that when the magnet 1 rotates, the screw will move in the height direction while performing a circular motion. The movement of the screw in the height direction can realize the size of the opening of the electronic expansion valve, which is used to adjust the flow through the valve port.

[0054] The stop assembly 3, the first part 31 is a stop rod 311, the second part 32 is a stop ring 323, the stop ring 323 is located in the spiral guide groove 21 and can rotate in the spiral guide groove 21, the stop rod 311 and the stop ring 323 are fixed or integrally formed, the stop rod 311 extends radially outward, the stop rod 311 includes a connecting portion 3111 and a pushing portion 3112, one side of the connecting portion 3111 is fixed or integrally formed with the stop ring 323, and the other side of the connecting portion 3111 is fixed or integrally formed with the pushing portion 3112 The thickness of the pushing portion 3112 along the height direction is greater than the thickness of the abutting portion 12 along the height direction, and the pushing portion 3112 and the abutting portion 12 at least partially overlap in the circumferential direction; the stop ring 323 can be made into multiple spirals like a general slip ring, and the multiple spirals can increase the reliability of the stop ring 323. The stop rod 311 extends radially outward to a position where it can contact the abutting portion 12. The stop rod 311 abuts against the abutting portion 12. The stop ring 323 is a non-sealed structure, which is more convenient to install.

[0055] Compared with the stopper device of a general electronic expansion valve, this embodiment lacks the spring guide rail, so the number of parts is reduced, the installation is simpler, and the cost is reduced.

[0056] During installation, first install the stop ring 323 in the spiral guide groove 21 of the nut 2, then offset the abutment portion 12 and the stop rod 311 of the magnet 1 from above, and then complete the installation of the magnet 1. This way, the installation efficiency is high and the production efficiency is improved.

[0057] like Figure 5 , Figure 6The upper stopper 211 includes a first stopper 22, and the lower stopper 212 includes a second stopper 23. The first stopper 22 and the second stopper 23 include a fixed section 221 and a buffer section 222. The fixed section 221 and the buffer section 222 are fixed or integrally formed. The fixed section 221 is fixed or limited or integrally formed with the nut 2. The buffer section 222 is located in the spiral guide groove 21, and a gap is left between the buffer section 222 and the wall portion corresponding to the spiral guide groove 21. The first stopper 22 and the spiral guide groove 21 are fixed or limited or integrally formed. The side wall corresponding to the upper side of the groove 21 is fixed or integrally formed, and the second stop plate 23 is fixed or integrally formed with the side wall corresponding to the lower side of the spiral guide groove 21. In this embodiment, the stop plate can be a bent steel sheet, and the buffer section 222 is located at the end of the spiral guide groove 21. When the second part 32 moves to the lower stop part 212 or the upper stop part 211, it will hit the buffer section 222. The buffer section 222 has a certain stroke, which can reduce the impact force, and the stop plate can be integrally injection molded with the nut 2, which is convenient for processing.

[0058] In other embodiments, the electronic expansion valve includes a nut 2, the nut 2 includes a base 20, an upper stopper 211, and a lower stopper 212, the nut 2 includes a spiral guide groove 21, the spiral guide groove 21 is located on the outer wall of the base 20, the spiral guide groove 21 is connected to the outside world on the upper side in the height direction, and the spiral guide groove 21 is not connected to the outside world on the lower side in the height direction; the upper stopper 211 includes a first stopper 22, the lower stopper 212 includes a second stopper 23, the first stopper 22 and the second stopper 23 include a fixed segment 221 and a buffer segment 222, the fixed segment 221 and the buffer segment 222 are fixed or integrally formed, the fixed segment 221 is fixed or limited or integrally formed with the nut 2, the buffer segment 222 is located in the spiral guide groove 21, and the buffer segment 2 A gap is left between 22 and the wall portion corresponding to the spiral guide groove 21; the fixed section 221 of the second stop plate 23 is fixed or integrally formed with the side wall corresponding to the lower side of the spiral guide groove 21, and the buffer section 222 of the second stop plate 23 is located in the spiral guide groove 21, the fixed section 221 of the first stop plate 22 is fixed or integrally formed with the inner wall of the spiral guide groove 21, and the buffer section 222 of the first stop plate 22 is located in the spiral guide groove 21, the first stop plate 22 is used to reduce the buffering of the first part 31 moving to the upper stop portion 211 and also has a stopping function, the second stop plate 23 is used to reduce the buffering of the first part 31 moving to the lower stop portion 212, the first stop plate 22 and the second stop plate 23 can be integrally formed with the nut 2, the processing is simple, and the production cost is reduced.

[0059] It should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail in this specification with reference to the above embodiments, it should be understood by those skilled in the art that the present invention can still be modified or replaced by equivalents, and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention should be covered by the claims of the present invention.

Claims

1. An electronic expansion valve, characterized in that: The electronic expansion valve comprises: Magnet (1); A nut (2), wherein the magnet (1) is sleeved on at least a portion of the nut (2), the nut (2) comprises a base (20), an upper stopper (211), and a lower stopper (212), the nut (2) comprises a spiral guide groove (21), the spiral guide groove (21) is located on the outer wall of the base (20), along the height direction of the base (20), the upper stopper (211) is located on the upper side of the spiral guide groove (21), and the lower stopper (212) is located on the lower side of the spiral guide groove (21); A stop assembly (3), the stop assembly (3) comprising a first part (31) and a second part (32), the first part (31) and the second part (32) being fixed directly or indirectly, the first part (31) being fixed to the magnet (1) or being integrally formed or being limitedly arranged, at least a portion of the second part (32) being located in the spiral guide groove (21), and the second part (32) being able to move along the spiral guide groove (21), the second part (32) being able to abut against the upper stop part (211) when being on the upper side of the spiral guide groove (21), and the second part (32) being able to abut against the lower stop part (212) when being on the lower side of the spiral guide groove (21).

2. The electronic expansion valve according to claim 1, characterized in that: The stop assembly (3) comprises an elastic part (33), the first part (31) being a stop rod (311), the second part (32) being a stop half ring (321), one end of the stop rod (311) being connected to the outer part of the circular arc of the stop half ring (321) via the elastic part (33), the inner part of the circular arc of the stop half ring (321) being limited in the spiral guide groove (21), and the other end of the stop rod (311) being fixed to or integrally formed with the magnet (1).

3. The electronic expansion valve according to claim 1, characterized in that: The stop assembly (3) comprises an elastic part (33), the first part (31) is a stop rod (311), the second part (32) is a stop needle (322), one end of the stop rod (311) is connected to one side of the stop needle (322) via the elastic part (33), the other side of the stop needle (322) is limited in the spiral guide groove (21), and the other end of the stop rod (311) is fixed to or integrally formed with the magnet (1).

4. The electronic expansion valve according to claim 2 or 3, characterized in that: The elastic part (33) and the stop rod (311) are integrally formed, and the diameter of the elastic part (33) is smaller than the diameter of the stop rod (311).

5. The electronic expansion valve according to claim 1, characterized in that: The magnet (1) comprises a limiting groove (11), a notch (111) of the limiting groove (11) faces the nut (2), and the limiting groove (11) has an open end (112) on one side in the axial direction, and the open end (112) is located at the bottom of the magnet (1); the second part (32) is limited in the spiral guide groove (21) and can rotate along the spiral guide groove (21), the first part (31) is at least partially located in the limiting groove (11), and the rotation of the magnet (1) drives the first part (31) to rotate.

6. The electronic expansion valve according to claim 5, characterized in that: The first part (31) is a stop rod (311), and the second part (32) is a stop ring (323). The stop ring (323) is fixed to one side of the stop rod (311). The stop ring (323) is limited in the spiral guide groove (21) and can rotate along the spiral guide groove (21). The other side of the stop rod (311) is limited in the limit groove (11).

7. The electronic expansion valve according to claim 1, characterized in that: The magnet (1) comprises an abutment portion (12) and a main body portion (10); the main body portion (10) is cylindrical; the abutment portion (12) extends from the main body portion (10) toward the axis of the main body portion (10); a portion of the first portion (31) protrudes from the nut (2) in the radial direction of the nut (2); and the first portion (31) and the abutment portion (12) at least partially overlap in the circumferential direction.

8. The electronic expansion valve according to claim 7, characterized in that: The first part (31) is a stop rod (311), and the second part (32) is a stop ring (323). The stop ring (323) is located in the spiral guide groove (21) and can rotate in the spiral guide groove (21). The stop rod (311) and the stop ring (323) are fixed or integrally formed. The stop rod (311) extends radially outward along the stop ring (323). The stop rod (311) comprises a connecting part (3111) and a pushing part (3112). The thickness of the pushing part (3112) along the height direction is greater than the thickness of the abutting part (12) along the height direction. One side of the connecting part (3111) is fixed or integrally formed with the stop ring (323), and the other side of the connecting part (3111) is fixed or integrally formed with the pushing part (3112). The pushing part (3112) and the abutting part (12) at least partially overlap in the radial direction.

9. The electronic expansion valve according to any one of claims 1 to 8, characterized in that: The spiral guide groove (21) is not connected to the outside in the height direction; the upper stopper (211) is a side wall corresponding to the upper side of the spiral guide groove (21); and the lower stopper (212) is a side wall corresponding to the lower side of the spiral guide groove (21).

10. The electronic expansion valve according to claim 9, characterized in that: The upper stop portion (211) comprises a first stop plate (22), and the lower stop portion (212) comprises a second stop plate (23). The first stop plate (22) and the second stop plate (23) comprise a fixing section (221) and a buffer section (222). The fixing section (221) and the buffer section (222) are fixed or integrally formed. The fixing section (221) is fixed or limited or integrally formed with the nut (2). The buffer section (222) is located in the spiral guide groove (21), and a gap is left between the buffer section (222) and a wall portion corresponding to the spiral guide groove (21). The first stop plate (22) is fixed or integrally formed with a side wall corresponding to the upper side of the spiral guide groove (21), and the second stop plate (23) is fixed or integrally formed with a side wall corresponding to the lower side of the spiral guide groove (21).

11. The electronic expansion valve according to any one of claims 1 to 8, characterized in that: The spiral guide groove (21) is connected to the outside world at the upper side in the height direction, and is not connected to the outside world at the lower side in the height direction. The upper stop portion (211) includes a first stop plate (22), and the lower stop portion (212) includes a second stop plate (23). The first stop plate (22) and the second stop plate (23) include a fixing section (221) and a buffer section (222). The fixing section (221) and the buffer section (222) are fixed or integrally formed. The fixing section (221) is fixed or limited or integrally formed with the nut (2). The buffer section (222) is fixed or limited or integrally formed with the nut (2). 22) is located in the spiral guide groove (21), and a gap is left between the buffer section (222) and the wall portion corresponding to the spiral guide groove (21); the fixed section (221) of the second stopper (23) is fixed or integrally formed with the side wall corresponding to the lower side of the spiral guide groove (21), and the buffer section (222) of the second stopper (23) is located in the spiral guide groove (21); the fixed section (221) of the first stopper (22) is fixed or integrally formed with the inner wall of the spiral guide groove (21), and the buffer section (222) of the first stopper (22) is located in the spiral guide groove (21).

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