Electronic expansion valve anti-rotation mechanism and electronic expansion valve assembly

Abstract

The invention provides an electronic expansion valve anti-rotation mechanism and an electronic expansion valve assembly, and relates to the field of electronic valves, and the electronic expansion valve anti-rotation mechanism comprises a valve body, a valve element assembly and a transmission assembly. A first anti-rotation part is arranged on the valve body. A first anti-rotation part is arranged on the valve body, a second anti-rotation part is arranged on the valve element assembly, the valve element assembly and the valve body are slidably connected in the extension direction of the preset axis, and the first anti-rotation part and the second anti-rotation part are matched to limit relative fixation of the valve element assembly and the valve body in the direction around the preset axis. The transmission assembly is connected with the valve element assembly and used for converting the rotary motion into reciprocating linear sliding of the valve element assembly in the extending direction of the preset axis. And due to the design of the anti-rotation mechanism, the flow control accuracy can be improved by reducing the probability that the valve element assembly rotates along with the transmission assembly.

Description

Technical Field

[0001] The invention relates to the field of electronic valves, and in particular to an electronic expansion valve anti-rotation mechanism and an electronic expansion valve assembly. Background Art

[0002] The electronic expansion valve can respond quickly to the dynamic changes of the air-conditioning refrigerant under driving conditions, and can be used in various control strategies to improve the efficiency and performance of the overall air-conditioning system. When the existing electronic valve is in operation, the internal coil is energized to generate a magnetic field, and the magnet rotates, which drives the connecting plate, the stop rod, and the slip ring to move together. The slip ring is installed on the spring guide rail, and the slip ring rotates on the spring guide rail. The spring guide rail has an upper limit and a lower limit. When the slip ring moves to the upper or lower end of the spring guide rail, the upper limit and the lower limit of the spring guide rail prevent the slip ring from continuing to move, and the slip ring stops moving. The protrusion on the slip ring then limits the movement of the stop rod, and the stop rod is stuck with the connecting plate, and the magnet stops moving. At the same time, the rotation of the magnet drives the connecting plate and the screw rod to rotate. The rotation of the screw rod realizes the up and down movement of the valve core by cooperating with the valve core, and the size of the flow area of ​​the valve port is controlled by the movement of the valve core.

[0003] The inventors found in their research that the valve core and valve seat matching structure of the electronic expansion valve in the prior art has at least the following disadvantages:

[0004] When the valve core moves up and down driven by the screw, the valve core and the valve seat may rotate relative to each other, causing the valve core to rotate with the screw. The valve core cannot move up and down normally, causing the valve core to lose steps and reduce the accuracy of flow control. Summary of the invention

[0005] The objects of the present invention include, for example, providing an electronic expansion valve anti-rotation mechanism and an electronic expansion valve assembly, which can improve the flow control accuracy by reducing the probability that the valve core assembly rotates together with the transmission assembly.

[0006] The embodiments of the present invention can be implemented as follows:

[0007] In a first aspect, the present invention provides an electronic expansion valve anti-rotation mechanism, comprising:

[0008] A valve body, a valve core assembly and a transmission assembly; the valve body is provided with a first anti-rotation portion, the valve core assembly is provided with a second anti-rotation portion, the valve core assembly is slidably connected to the valve body in the extension direction of a preset axis, the first anti-rotation portion and the second anti-rotation portion cooperate to limit the valve core assembly and the valve body to be relatively fixed in the direction around the preset axis; the transmission assembly is connected to the valve core assembly, and the transmission assembly is used to convert rotational motion into reciprocating linear sliding of the valve core assembly in the extension direction of the preset axis.

[0009] In an optional embodiment, one of the first anti-rotation portion and the second anti-rotation portion is configured as an anti-rotation groove, and the other of the two is configured as an anti-rotation protrusion that is snap-fitted with the anti-rotation groove.

[0010] Based on the above solution, the first anti-rotation part and the second anti-rotation part have simple structures, are easy to process and assemble, have high assembly quality, and have good anti-rotation effect.

[0011] In an optional embodiment, an assembly through hole is provided on the valve body, and the valve core assembly can be slidably installed in the assembly through hole.

[0012] Based on the above scheme, the position of the valve core relative to the valve body is positioned by assembling the through hole, which not only facilitates the assembly of the valve core assembly, but also provides guidance for the valve core assembly, thereby improving the sliding stability of the valve core assembly.

[0013] In an optional embodiment, the first anti-rotation portion is arranged on the hole wall of the assembly through hole; and the second anti-rotation portion is arranged on the outer peripheral surface of the valve core assembly.

[0014] Based on the above solution, the first anti-rotation portion is located in the assembly through hole, which rationally utilizes the internal space of the valve body and improves the compactness of the overall structure.

[0015] In an optional embodiment, the first anti-rotation portion is configured as an anti-rotation groove located on the hole wall of the assembly through hole, and the second anti-rotation portion is configured as an anti-rotation protrusion located on the outer peripheral surface of the valve core assembly.

[0016] Based on the above scheme, in order to improve the sealing between the valve core assembly and the valve body, a sealing ring is generally arranged between the valve core assembly and the valve body. The sealing ring is sleeved on the outside of the valve core assembly and contacts with the hole wall of the assembly through hole. The anti-rotation protrusion is arranged on the valve core assembly, and the anti-rotation groove is arranged on the hole wall of the assembly through hole. The axial dimension of the valve core assembly can be reduced without affecting the sealing performance of the sealing ring.

[0017] In an optional embodiment, the valve core assembly includes a valve core body and a threaded sleeve, the valve core body and the valve body are slidably matched in the extension direction of the preset axis, and the two are relatively fixed in the circumferential direction of the preset axis; the threaded sleeve is fixed to the valve core body; the transmission assembly is connected to the threaded sleeve, and is used to convert the rotational motion into reciprocating linear sliding of the valve core body and the threaded sleeve.

[0018] Based on the above solution, the valve core assembly is set as a split structure in which the valve core body and the threaded sleeve cooperate. The valve core body and the threaded sleeve can be processed independently without affecting each other. When a new valve core shape needs to be developed, the threaded sleeve can be directly applied to the new valve core without the need to design a new mold for the threaded sleeve, thereby saving processing costs.

[0019] In an optional embodiment, the valve core body is provided with a fixed through hole, and the fixed through hole includes a first hole section and a second hole section that are connected, the aperture of the first hole section is smaller than the aperture of the second hole section, and the threaded sleeve is simultaneously inserted into the first hole section and the second hole section, the threaded sleeve is clearance-fitted with the first hole section, and the threaded sleeve is interference-fitted with the second hole section.

[0020] Based on the above solution, the threaded sleeve is positioned by fixing the through hole, which is convenient for installation.

[0021] In an optional embodiment, the valve core assembly further includes an anti-rotation ring, which is fixedly connected to the valve core body and is snap-fitted with the threaded sleeve to limit the rotation of the threaded sleeve relative to the valve core body.

[0022] Based on the above scheme, the torque of the transmission assembly is transmitted to the valve core body through the threaded sleeve. In order to prevent the valve core body and the threaded sleeve from rotating relative to each other, thereby causing the valve core body to miss steps, an anti-rotation ring is fixed on the valve core body. The anti-rotation ring is used to limit the rotation of the threaded sleeve, thereby improving the firmness of the connection between the threaded sleeve and the valve core body.

[0023] In an optional embodiment, the transmission assembly includes a magnetic rotor module, a connecting plate and a screw body, the magnetic rotor module is fixedly connected to the screw body via the connecting plate; the screw body is threadedly matched with the threaded sleeve; the screw body is used to rotate under the drive of the magnetic rotor module, and can convert the rotational motion into relative sliding of the screw body and the threaded sleeve in the extension direction of the preset axis.

[0024] Based on the above scheme, after the magnetic rotor module is energized, it can drive the screw body to rotate through the connecting plate, thereby converting the rotation of the screw body into reciprocating linear motion of the threaded sleeve, and then driving the valve core body to reciprocate through the threaded sleeve, thereby achieving the purpose of the valve core body regulating the valve port flow, and the operation is flexible and convenient.

[0025] In a second aspect, the present invention provides an electronic expansion valve assembly, the electronic expansion valve assembly comprising:

[0026] The electronic expansion valve anti-rotation mechanism according to any one of the aforementioned embodiments.

[0027] The beneficial effects of the embodiments of the present invention include, for example:

[0028] To sum up, the electronic expansion valve anti-rotation mechanism provided in this embodiment, the valve core assembly and the valve body are assembled together, and a first anti-rotation portion is provided on the valve body, and a second anti-rotation portion is provided on the valve core assembly. The first anti-rotation portion and the second anti-rotation portion cooperate to effectively limit the rotation of the valve core assembly and the valve body around a preset axis. That is, the valve core assembly is not easy to rotate relative to the valve body during the reciprocating linear motion driven by the transmission assembly, the steps of the valve core assembly are not easy to be lost, and the flow control is more precise. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 A schematic diagram of an anti-rotation mechanism of an electronic expansion valve according to an embodiment of the present application;

[0031] Figure 2 A cross-sectional schematic diagram of an electronic expansion valve anti-rotation mechanism according to an embodiment of the present application;

[0032] Figure 3 A schematic diagram of a valve body according to an embodiment of the present application;

[0033] Figure 4 A schematic diagram of a valve core assembly according to an embodiment of the present application;

[0034] Figure 5 This is an exploded schematic diagram of a valve core assembly according to an embodiment of the present application;

[0035] Figure 6 A cross-sectional schematic diagram of a valve core assembly according to an embodiment of the present application;

[0036] Figure 7 Schematic diagram of an electronic expansion valve assembly according to an embodiment of the present application.

[0037] icon:

[0038] 100-valve body; 101-assembly through hole; 110-first anti-rotation part; 200-valve core assembly; 210-second anti-rotation part; 211-arc surface; 220-valve core body; 221-fixed through hole; 2211-first hole section; 2212-second hole section; 2213-annular limiting surface; 222-weight reduction hole; 230-threaded sleeve; 231-cap body; 232-threaded body; 233-clamping protrusion; 240-anti-rotation ring; 241-clamping groove; 300-transmission assembly; 310-magnetic rotor module; 320-connecting plate; 330-screw body; 400-valve port; 500-sealing ring. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0042] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0043] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0044] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0045] In the prior art, the valve core is threaded with the lead screw, and when the lead screw rotates, it can drive the valve core to reciprocate up and down, thereby controlling the flow of the valve port 400 through the valve core. Since the valve core is limited by the valve seat, the valve core generally cannot rotate relative to the valve seat, so that the valve core can achieve reciprocating linear motion driven by the lead screw. Since the prior art does not provide an anti-rotation structure for the valve core and the valve seat, the valve core rotates relative to the valve seat driven by the lead screw, resulting in loss of steps of the valve core and poor flow control accuracy. In addition, when the valve core rotates relative to the valve seat, it also rotates relative to the valve port 400, which accelerates wear and easily causes the valve core and the valve port 400 to fail in sealing.

[0046] The valve core lost steps can be understood as, under normal circumstances, the valve core can make a corresponding linear motion while the screw rod rotates, and the distance L that the valve core moves in the linear direction is the same for each rotation of the screw rod. If the valve core rotates with the screw rod, the valve core does not move a distance L in the linear direction when the screw rod rotates one circle, indicating that the valve core lost steps and the valve core cannot accurately control the flow of the valve port 400.

[0047] In view of this, the designer provides an anti-rotation mechanism for an electronic expansion valve, which can ensure that the valve core assembly 200 is not easy to rotate relative to the valve body 100 when making linear motion driven by the transmission assembly 300, the valve core assembly 200 is not easy to lose steps, and the flow control accuracy is high.

[0048] Please combine Figure 1 and Figure 2 In this embodiment, the anti-rotation mechanism of the electronic expansion valve includes a valve body 100, a valve core assembly 200 and a transmission assembly 300. A first anti-rotation portion 110 is provided on the valve body 100. A second anti-rotation portion 210 is provided on the valve core assembly 200, and the valve core assembly 200 is slidably connected to the valve body 100 in the extension direction of the preset axis. The first anti-rotation portion 110 and the second anti-rotation portion 210 cooperate to limit the valve core assembly 200 and the valve body 100 to be relatively fixed in the direction around the preset axis. The transmission assembly 300 is connected to the valve core assembly 200, and the transmission assembly 300 is used to convert the rotational motion into the reciprocating linear sliding of the valve core assembly 200 in the extension direction of the preset axis.

[0049] As described above, the working mode of the electronic expansion valve anti-rotation mechanism provided in this embodiment is as follows:

[0050] The transmission assembly 300 moves, driving the valve core assembly 200 to reciprocate in a straight line. The valve core assembly 200 can change its relative position with the valve port 400, thereby adjusting the flow of the valve port 400. Since the valve core assembly 200 and the valve body 100 are limited by the first anti-rotation part 110 and the second anti-rotation part 210, the valve core assembly 200 is not easy to rotate relative to the valve body 100. When the transmission assembly 300 rotates one circle, the valve core assembly 200 can move a set distance L in a straight line direction. The valve core assembly 200 is not easy to lose steps. The valve core assembly 200 has high control accuracy for the flow of the valve port 400, and the flow regulation is accurate and reliable.

[0051] The following embodiments illustrate the details of the anti-rotation mechanism of the electronic expansion valve of the present application by way of examples.

[0052] Please combine Figure 1 and Figure 2In this embodiment, the electronic expansion valve anti-rotation mechanism optionally includes a valve body 100, a valve core assembly 200 and a transmission assembly 300. The valve core assembly 200 is installed on the valve body 100 assembly, and the transmission assembly 300 is in transmission cooperation with the valve core assembly 200. When the transmission assembly 300 moves, it can convert the rotational motion into the reciprocating linear motion of the valve core assembly 200, so that the valve core assembly 200 moves relative to the valve port 400 connected to the valve body 100, and the relative position between the valve core assembly 200 and the valve port 400 changes, thereby realizing flow regulation.

[0053] Please combine Figure 3 Optionally, an assembly through hole 101 is provided on the valve body 100, and the assembly through hole 101 may be a circular hole. A first anti-rotation portion 110 is provided on the hole wall of the assembly through hole 101. The first anti-rotation portion 110 may be provided as an anti-rotation groove, and the anti-rotation groove may be an arc-shaped groove. The length direction of the anti-rotation groove extends in the axial direction of the assembly through hole 101, and one end of the anti-rotation groove extends to the end face of the valve body 100.

[0054] It should be understood that in other embodiments, the first anti-rotation portion 110 may also be configured as an anti-rotation protrusion.

[0055] Please combine Figure 4-Figure 6 Optionally, the valve core assembly 200 includes a valve core body 220, a threaded sleeve 230 and an anti-rotation ring 240. The threaded sleeve 230 and the anti-rotation ring 240 are both fixed in the valve core body 220, and the threaded sleeve 230 and the anti-rotation ring 240 are relatively fixed to the valve core body 220 in the circumferential direction of the valve core body 220, that is, the valve core body 220, the threaded sleeve 230 and the anti-rotation ring 240 will not rotate relative to each other, and the three rotate differently.

[0056] Optionally, the valve core body 220 may be a cylindrical structure, and the valve core body 220 is provided with a connected fixed through hole 221 and a weight-reducing hole 222, and both the fixed through hole 221 and the weight-reducing hole 222 may be cylindrical holes, and the two may be coaxially arranged, and the axes of the two coincide with the axis of the valve core body 220. The diameter of the weight-reducing hole 222 is larger than the diameter of the fixed through hole 221, and the weight-reducing effect is good.

[0057] Furthermore, the fixed through hole 221 can be set as a stepped hole, and the weight-reducing hole 222 is connected to the first hole section 2211 with a smaller aperture of the fixed through hole 221, and the hole wall of the fixed through hole 221 is formed with an annular limiting surface 2213, and the annular limiting surface 2213 is located at the connecting position of the first hole section 2211 with a smaller aperture and the second hole section 2212 with a larger aperture.

[0058] Please combine Figure 4 and Figure 5At the same time, a second anti-rotation portion 210 is provided on the outer circumferential surface of the valve core body 220. The second anti-rotation portion 210 can be set as an anti-rotation protrusion. The anti-rotation protrusion protrudes outward from the outer circumferential surface of the valve core body 220 in the radial direction of the valve core body 220. The anti-rotation protrusion is provided with two concave arc surfaces 211 on both sides of the circumferential direction of the valve core body 220. The arc surfaces 211 are concave inward along the radial direction of the valve core body 220. The two arc surfaces 211 are located in the area surrounded by the outer circumferential surface of the valve core body 220. In this way, when processing the anti-rotation protrusion, it is not easy to form a part protruding from the outer circumferential surface of the valve core body 220 on both sides of the anti-rotation protrusion, and the anti-rotation protrusion is not easy to interfere with the anti-rotation groove. The anti-rotation protrusion can be smoothly embedded in the anti-rotation groove to achieve a snap-fit ​​fit with the anti-rotation groove. At the same time, due to the design of the arc surfaces 211 on both sides, the strength of the anti-rotation protrusion on both sides is increased. When the anti-rotation protrusion is subjected to torque, it is not easy to crack on both sides, and the service life is long.

[0059] It should be understood that in other embodiments, when the first anti-rotation portion 110 is set as an anti-rotation protrusion, the second anti-rotation portion 210 can be set as an anti-rotation groove. It is worth noting that in order to improve the sealing between the valve core assembly 200 and the valve body 100, a sealing ring 500 is generally set between the valve core body 220 and the valve body 100. The sealing ring 500 is sleeved outside the valve core body 220 and contacts the hole wall of the assembly through hole 101. The sealing ring 500 and the valve body 100 are relatively fixed in the axial direction of the valve body 100, and the valve core body 220 can reciprocate up and down relative to the sealing ring 500. The anti-rotation protrusion is set on the outer peripheral surface of the valve core body 220, and the anti-rotation groove is set on the hole wall of the assembly through hole 101, which can reduce the axial size of the valve core body 220 without affecting the sealing performance of the sealing ring 500. That is to say, if the anti-rotation groove is provided on the outer peripheral surface of the valve core body 220, and the anti-rotation protrusion is provided on the hole wall of the assembly through hole 101, the anti-rotation protrusion slides in the anti-rotation groove, and the length of the anti-rotation groove is designed to be longer. In order to avoid cutting off the sealing ring 500, it is necessary to increase the length of the valve core body 220 to meet the length requirement of the anti-rotation groove, which results in the axial dimension of the valve core body 220 being too large and the overall axial dimension of the electronic expansion valve being large.

[0060] Please combine Figure 4-Figure 5Optionally, the threaded sleeve 230 includes an integrated cap body 231 and a threaded body 232, the cap body 231 is located at one end of the threaded body 232 and the two are coaxially arranged, the outer diameter of the cap body 231 is greater than the outer diameter of the threaded body 232, and the two form a step structure. The end face of the cap body 231 away from the threaded body 232 is provided with a clamping protrusion 233. The threaded sleeve 230 is provided with a threaded hole that simultaneously penetrates the cap body 231 and the threaded body 232. During assembly, the threaded body 232 of the threaded sleeve 230 is inserted into the first hole section 2211 from the second hole section 2212, and the end face of the cap body 231 connected with the threaded body 232 abuts against the annular limiting surface 2213, limiting the depth of the threaded sleeve 230 inserted into the fixed through hole 221. At the same time, the cap body 231 and the second hole section 2212 are interference fit, and the threaded body 232 and the first hole section 2211 are clearance fit to avoid transition constraints.

[0061] Optionally, the anti-rotation ring 240 is set as a circular ring, and one end face of the anti-rotation ring 240 is provided with a clamping groove 241, the anti-rotation ring 240 is embedded in the second hole section 2212, the anti-rotation ring 240 contacts the cap body 231, the clamping groove 241 on the anti-rotation ring 240 is clamped and matched with the clamping protrusion 233 on the cap body 231, and the anti-rotation ring 240 is welded and fixed to the valve core body 220, thereby limiting the relative rotation of the anti-rotation ring 240 and the threaded sleeve 230. Since the anti-rotation ring 240 contacts the cap body 231, the anti-rotation ring 240 and the annular limiting surface 2213 cooperate to clamp the threaded sleeve 230, so that the relative positions of the threaded sleeve 230, the anti-rotation ring 240 and the valve core body 220 in the axial direction of the preset axis are fixed. In this way, the valve core body 220, the threaded sleeve 230 and the anti-rotation ring 240 will not rotate relative to each other, nor will they slide axially, and the combination of the three is stable and reliable.

[0062] It should be noted that, by setting the valve core assembly 200 as a split structure, the valve core body 220, the threaded sleeve 230 and the anti-rotation ring 240 are independently designed and manufactured, and do not affect each other. When a new valve core shape needs to be developed, the threaded sleeve 230 can be directly applied to the new valve core without designing a new mold for the threaded sleeve 230, thereby saving processing costs.

[0063] Please combine Figure 1-Figure 2In this embodiment, the transmission assembly 300 optionally includes a magnetic rotor module 310, a connecting plate 320 and a screw body 330. The magnetic rotor module 310 is fixedly connected to the screw body 330 through the connecting plate 320; the screw body 330 is simultaneously inserted into the valve body 100, the anti-rotation ring 240 and the threaded sleeve 230 and is threadedly matched with the threaded sleeve 230, one end of the screw body 330 extends into the weight reduction hole 222, and the screw body 330 is used to rotate under the drive of the magnetic rotor module 310, and can convert the rotational motion into a relative sliding of the screw body 330 and the threaded sleeve 230 in the extension direction of the preset axis. That is, when the screw body 330 rotates, the threaded sleeve 230, the anti-rotation ring 240 and the valve core body 220 can slide back and forth along the axial direction of the screw body 330. By controlling the number of turns of the screw body 330, the distance of the linear movement of the valve core body 220 can be accurately controlled. Since the valve core body 220 is not easy to rotate with the screw body 330 and the steps are not easy to be lost, the flow control achieved by the movement of the valve core body 220 is highly accurate.

[0064] It should be understood that the axial movement of the screw body 330 relative to the valve body 100 can be reasonably controlled, thereby effectively ensuring that the valve core assembly 200 can adaptively reciprocate axially when the screw body 330 rotates.

[0065] The electronic expansion valve anti-rotation mechanism provided in this embodiment has a valve core body 220 and a valve body 100 that are axially slidably matched. The valve core body 220 and the valve body 100 are clamped by the first anti-rotation part 110 and the second anti-rotation part 210 to achieve circumferential limit, that is, the valve core body 220 and the valve body 100 are relatively fixed in the circumferential direction. When the screw rod body 330 rotates, the valve core body 220 can slide adaptively along the axial direction of the screw rod body 330, and the flow rate of the valve port 400 is adjusted by the valve core body 220. The valve core body 220 and the valve body 100 are not easy to rotate relative to each other, and the rotational motion of the screw rod body 330 can be effectively converted into the linear motion of the valve core body 220. The valve core body 220 is not easy to lose steps, and the flow rate control is accurate and reliable.

[0066] Please combine Figure 7 This embodiment also provides an electronic expansion valve assembly, including the electronic expansion valve anti-rotation mechanism of the above embodiment. Obviously, the electronic expansion valve assembly also includes other components to realize its basic functions. You can refer to the existing known technology. In order to avoid repeated description, no detailed description is given in this embodiment.

[0067] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An anti-rotation mechanism for an electronic expansion valve, characterized in that: include: A valve body (100), a valve core assembly (200) and a transmission assembly (300); the valve body (100) is provided with a first anti-rotation portion (110), the valve core assembly (200) is provided with a second anti-rotation portion (210), the valve core assembly (200) and the valve body (100) are slidably connected in the extension direction of a preset axis, the first anti-rotation portion (110) and the second anti-rotation portion (210) cooperate to limit the valve core assembly (200) and the valve body (100) to be relatively fixed in the direction around the preset axis; the transmission assembly (300) is connected to the valve core assembly (200), and the transmission assembly (300) is used to convert rotational motion into reciprocating linear sliding of the valve core assembly (200) in the extension direction of the preset axis.

2. The electronic expansion valve anti-rotation mechanism according to claim 1, characterized in that: One of the first anti-rotation portion (110) and the second anti-rotation portion (210) is configured as an anti-rotation groove, and the other is configured as an anti-rotation protrusion that is snap-fitted with the anti-rotation groove.

3. The electronic expansion valve anti-rotation mechanism according to claim 1, characterized in that: The valve body (100) is provided with an assembly through hole (101), and the valve core assembly (200) can be slidably installed in the assembly through hole (101).

4. The electronic expansion valve anti-rotation mechanism according to claim 3, characterized in that: The first anti-rotation portion (110) is arranged on the hole wall of the assembly through hole (101); and the second anti-rotation portion (210) is arranged on the outer peripheral surface of the valve core assembly (200).

5. The electronic expansion valve anti-rotation mechanism according to claim 4, characterized in that: The first anti-rotation portion (110) is configured as an anti-rotation groove located on the hole wall of the assembly through hole (101), and the second anti-rotation portion (210) is configured as an anti-rotation protrusion located on the outer peripheral surface of the valve core assembly (200).

6. The electronic expansion valve anti-rotation mechanism according to any one of claims 1 to 5, characterized in that: The valve core assembly (200) comprises a valve core body (220) and a threaded sleeve (230), wherein the valve core body (220) and the valve body (100) are slidably matched in the extension direction of the preset axis, and the two are relatively fixed in the circumferential direction of the preset axis; the threaded sleeve (230) is fixed to the valve core body (220); and the transmission assembly (300) is connected to the threaded sleeve (230) for converting rotational motion into reciprocating linear sliding of the valve core body (220) and the threaded sleeve (230).

7. The electronic expansion valve anti-rotation mechanism according to claim 6, characterized in that: The valve core body (220) is provided with a fixed through hole (221), and the fixed through hole (221) includes a first hole section (2211) and a second hole section (2212) which are connected, the aperture of the first hole section (2211) is smaller than the aperture of the second hole section (2212), and the threaded sleeve (230) is simultaneously penetrated into the first hole section (2211) and the second hole section (2212), the threaded sleeve (230) and the first hole section (2211) are clearance-fitted, and the threaded sleeve (230) and the second hole section (2212) are interference-fitted.

8. The electronic expansion valve anti-rotation mechanism according to claim 7, characterized in that: The valve core assembly (200) further comprises an anti-rotation ring (240), wherein the anti-rotation ring (240) is fixedly connected to the valve core body (220), and the anti-rotation ring (240) is engaged with the threaded sleeve (230) to limit the rotation of the threaded sleeve (230) relative to the valve core body (220).

9. The electronic expansion valve anti-rotation mechanism according to claim 6, characterized in that: The transmission assembly (300) comprises a magnetic rotor module (310), a connecting plate (320) and a screw body (330); the magnetic rotor module (310) is fixedly connected to the screw body (330) via the connecting plate (320); the screw body (330) is threadedly engaged with the threaded sleeve (230); the screw body (330) is used to rotate under the drive of the magnetic rotor module (310), and can convert the rotational motion into relative sliding of the screw body (330) and the threaded sleeve (230) in the extension direction of the preset axis.

10. An electronic expansion valve assembly, characterized in that: The electronic expansion valve assembly comprises: The electronic expansion valve anti-rotation mechanism according to any one of claims 1 to 9.

Images