JP2022503561A - Electronic expansion valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a valve body (10) and a limiting member rotatably provided in the valve body (10), having a vertical displacement at the same time as rotating, and having two limiting positions in the vertical direction. (20) and a plastic drive member (30) provided in the valve body (10) and connected to the limiting member (20) to move the limiting member (20) to rotate between two limiting positions. , A magnetic rotor (90) rotatably provided in the valve body (10) and drivenly connected to the plastic drive member (30), wherein the entire plastic drive member (30) is a magnetic rotor. An electronic expansion valve containing a magnetic rotor (90) located within (90). According to the above technical form, the driving member in the prior art is made of a metal material, and the collision between the driving member and the limiting member (20) generates noise, which causes a problem that the favorable impression of the experience of using the electronic expansion valve is lowered. Settled. [Selection diagram] Fig. 1

Description

The present invention relates to the technical field of valves, specifically to electronic expansion valves.

In a related technique, an electronic expansion valve comprises a valve body, a screw, and a limiting member that is rotatably provided in the valve body and that rotates and at the same time has a vertical displacement and has two vertical limiting positions. It includes a drive member that limits the moving stroke of the screw connected to the drive member by driving the limiting member and moving it between the two limiting positions.

However, both the driving member and the limiting member in the related technology are made of a metal material, and the collision between the driving rod and the limiting member generates noise, which reduces the favorable impression of the experience of using the electronic expansion valve.

The present invention solves the problem that the driving member in the prior art is made of a metal material, and the collision between the driving member and the limiting member causes noise, which reduces the favorable impression of the experience of using the electronic expansion valve. The main purpose is to provide a valve.

In order to achieve the above object, the present invention comprises a valve body, a limiting member rotatably provided in the valve body, and a limiting member having a vertical displacement at the same time as rotating and having two limiting positions in the vertical direction. A plastic drive member provided inside the valve and connected to the limiting member to move the limiting member to rotate between two limiting positions, and a rotatably provided inside the valve body and drivenly connected to the plastic driving member. Provided is an electronic expansion valve including a magnetic rotor in which the entire plastic drive member is located within the magnetic rotor.

Further, the limiting member is a slip ring, the slip ring includes a slip ring main body and a protrusion provided so as to project from the outer peripheral surface of the slip ring main body, and the plastic drive member includes a connection cylinder and an inner wall surface of the connection cylinder. The slip ring is rotatably provided in the connecting cylinder, and the pressing portion is brought into contact with the protruding portion to press and rotate the slip ring.

Further, the limiting member is a slip ring, the slip ring includes a slip ring main body and a protrusion provided so as to project from the outer peripheral surface of the slip ring main body, and the plastic drive member includes a connecting cylinder, and the axial direction of the connecting cylinder is included. A notch extending along the axial direction of the connecting cylinder is provided on the end face of one end of the slip ring.

Further, if there are at least two notches and there are two notches, the two notches are provided symmetrically at intervals along the circumferential direction of the connecting tube. Further, the limiting member is a slip ring, the slip ring includes a slip ring main body and a protrusion provided so as to project from the outer peripheral surface of the slip ring main body, and the plastic drive member includes a connection cylinder and an inner wall surface of the connection cylinder. The slip ring is rotatably provided in the connecting tube, including the accommodation groove provided in the accommodation groove, and the protrusion extends into the accommodation groove to allow the slip ring to rotate with the plastic drive member.

Further, the electronic expansion valve further includes a screw sleeve, which is made of a metallic material, is fitted and connected to a connecting cylinder by an injection process, and is located at one end of the connecting cylinder.

Further, a notch extending along the axial direction of the connecting cylinder is provided on the end surface of one end of the connecting cylinder away from the screw sleeve.

Further, the electronic expansion valve includes a valve core movably provided at the valve opening of the valve body, and a connection segment and a support segment connected to each other, the connection segment extends into the connection cylinder, and the slip ring is a connection segment. A nut seat that is externally fitted to the outer peripheral side of the connection segment, a spring that is externally fitted to the outer peripheral side of the connection segment and is abutted between the slip ring and the support segment, and a first rotatably provided nut seat. The end extends into the screw sleeve and is connected to the screw sleeve, the second end further includes a screw that is drivenly connected to the valve core, and the magnetic rotor is drivenly connected to the connection tube and magnetically connected. A first locking structure is provided on the inner peripheral wall of the rotor, a second locking structure is provided on the outer peripheral wall of the connecting cylinder, and the magnetic rotor moves a plastic drive member to rotate synchronously. As such, the first locking structure and the second locking structure are locked and engaged.

Further, the first locking structure is a locking projection provided so as to project from the inner peripheral wall of the magnetic rotor, and the second locking structure is a locking groove provided on the outer peripheral wall of the connecting cylinder.

Further, the electronic expansion valve further includes a pressing sheet, and the pressing sheet is a pressing sheet main body having an avoidance opening and a plurality of stop sheets provided at intervals along the circumferential direction of the avoidance opening. The screw sleeve includes a mounting segment and a fastening segment that are sequentially connected along a direction away from the connecting cylinder, and includes a plurality of retaining sheets in which an avoidance space is formed between the plurality of retaining sheets. The sheet is fitted onto the screw sleeve through the avoidance space after deformation, and after recovering from the deformation, it is stopped and engaged with the stop segment, and the magnetic rotor and the connecting cylinder are abutted by the step structure, and the magnetic rotor is abutted. It prevents the relative fluctuation of the magnetic rotor between the and the connecting cylinder along the axial direction.

By applying the technical embodiment of the present invention, a plastic drive member is provided, and when the plastic drive member drives the limiting member and moves it between two limiting positions, noise is generated when the plastic driving member collides with the limiting member. Since it is difficult, the favorable impression of the experience of using the electronic expansion valve is improved, and further, since all the plastic drive members are located in the magnetic rotor, the structure of the electronic expansion valve in the height direction is sufficiently compacted.

The drawings of the specification which form part of the present application are for the purpose of providing a further understanding of the present invention, and the schematic examples of the present invention and their description thereof are for the purpose of interpreting the present invention. However, the present invention is not inappropriately limited.

The schematic structural diagram of the electronic expansion valve according to Example 1 of this invention is shown. FIG. 1 shows a schematic structural diagram in which the plastic drive member of the electronic expansion valve of FIG. 1 and the slip ring are engaged with each other. FIG. 1 shows a schematic structural diagram of an angle of the screw sleeve and the plastic drive member of the electronic expansion valve of FIG. FIG. 1 shows a schematic structural diagram of another angle of the screw sleeve and the plastic drive member of the electronic expansion valve of FIG. The schematic structural diagram of the magnetic rotor of the electronic expansion valve of FIG. 1 is shown. The schematic structural drawing of the pressing sheet of the electronic expansion valve of FIG. 1 is shown. The schematic structural drawing which engages with the plastic drive member and a slip ring according to Example 2 of this invention is shown. FIG. 7 shows a schematic structural diagram of the screw sleeve of the electronic expansion valve, the plastic drive member, the magnetic rotor, and the pressing sheet of FIG. 7. FIG. 8 shows a schematic structural diagram of the screw sleeve and the plastic drive member in FIG. The schematic structural diagram of the magnetic rotor in FIG. 8 is shown. FIG. 3 shows a schematic structural diagram in which the plastic drive member of the electronic expansion valve according to the third embodiment of the present invention and the slip ring are engaged with each other. FIG. 11 shows a schematic structural diagram of the screw sleeve and the plastic drive member of the electronic expansion valve of FIG.

Here, the above drawing includes the following reference numerals.
10 valve body, 11 valve port, 20 limiting member, 21 slip ring, 211 slip ring body, 212 protrusion, 30 plastic drive member, 31 connection tube, 32 pressing part, 311 notch, 312 accommodation groove, 313 locking groove , 40 screw sleeve, 41 mounting segment, 42 stop segment, 50 valve core, 60 nut seat, 61 connection segment, 62 support segment, 70 spring, 80 screw, 90 magnetic rotor, 91 locking protrusion, 100 pressing sheet, 101 Press sheet body, 102 avoidance opening, 103 stop sheet, 104 avoidance space, 110 step structure.

Hereinafter, the technical embodiments in the examples of the present invention will be clearly and completely described with reference to the drawings in the examples of the present invention, but the described examples are merely examples of a part of the present invention, and all of them are described. It is clear that this is not an example of. The description for at least one exemplary embodiment below is merely exemplary in practice and is not intended to limit the invention and its application or use. Based on the examples in the present invention, all other examples obtained by those skilled in the art without creative effort are all within the scope of protection of the present invention.

In order to solve the problem that the driving member in the prior art is made of a metal material and the collision between the driving member and the limiting member causes noise, which reduces the favorability of the experience of using the electronic expansion valve, the present invention is made. , Provides an electronic expansion valve.

This application provides three specific examples, which are described in detail below. Of these, FIGS. 1 to 6 show a schematic structural diagram of the electronic expansion valve of the first embodiment, FIGS. 7 to 10 show a schematic structural diagram of the electronic expansion valve of the second embodiment, and FIGS. 11 to 12 show a schematic structural diagram of the electronic expansion valve of the second embodiment. , The schematic structural diagram of the electron expansion valve of Example 3 is shown.

Example 1
As shown in FIGS. 1 to 6, the electronic expansion valve is rotatably provided in the valve body 10 and the valve body 10 and has a vertical displacement at the same time as the rotation, and has two limiting positions in the vertical direction. In the limiting member 20, a plastic driving member 30 provided in the valve body 10 and connected to the limiting member 20 to move the limiting member 20 and rotate it between two limiting positions, and in the valve body 10. A magnetic rotor 90 that is rotatably provided and is drivenly connected to the plastic drive member 30 and includes a magnetic rotor 90 in which the entire plastic drive member 30 is located within the magnetic rotor 90.

In the present application, the plastic driving member 30 is provided, and when the plastic driving member 30 drives the limiting member 20 to move between the two limiting positions, noise is less likely to occur when the limiting member 20 collides with the limiting member 20. Further, since the plastic drive member 30 is located in the magnetic rotor 90, the structure of the electronic expansion valve in the height direction is sufficiently compacted.

As shown in FIG. 2, the limiting member 20 is a slip ring 21, and the slip ring 21 includes a slip ring main body 211 and a protruding portion 212 protruding from the outer peripheral surface of the slip ring main body 211, and is a plastic drive member. Reference numeral 30 includes a connecting cylinder 31 and a pressing portion 32 projecting from the inner wall surface of the connecting cylinder 31, a slip ring 21 is rotatably provided in the connecting cylinder 31, and the pressing portion 32 is provided on the protruding portion 212. It is abutted and presses the slip ring 21 to rotate it. In this way, the connection cylinder 31 and the pressing portion 32 rotate in synchronization with each other, and the pressing portion 32 presses the protruding portion 212, so that the slip ring 21 is moved by the plastic drive member 30 to rotate and is vertical. It will have a directional displacement, which will move between the two restricted positions.

As shown in FIGS. 1, 3 and 4, the electronic expansion valve further includes a screw sleeve 40, which is made of a metallic material and is fitted and connected to and connected to a connecting cylinder 31 by an injection process. It is located at one end of the cylinder 31. Considering the processing and manufacturing of the electronic expansion valve, the screw sleeve 40 is made of a metal material and can be easily welded to the screw 80. The connection cylinder 31 and the pressing portion 32 are integrally injection-molded, and the screw is injected by an injection process. The sleeve 40 and the plastic drive member 30 are fixedly connected.

As shown in FIG. 1, the electronic expansion valve further includes a valve core 50, a nut seat 60, a spring 70 and a screw 80, the valve body 10 has a valve port 11, and the valve core 50 is movable to the valve port 11. The nut seat 60 includes a connection segment 61 and a support segment 62 connected to each other, the connection segment 61 extends into the connection cylinder 31, the slip ring 21 is fitted on the outer peripheral side of the connection segment 61, and a spring. The 70 is fitted on the outer peripheral side of the connecting segment 61 and is abutted between the slip ring 21 and the support segment 62, the screw 80 is rotatably provided on the nut seat 60, and the first end of the screw 80 is a screw. It extends into the sleeve 40 and is connected to the screw sleeve 40, and the second end of the screw 80 is drivenly connected to the valve core 50. The screw 80 is used to drive the valve core 50 and move it at the position of the valve port 11, thereby controlling the opening and closing of the electronic expansion valve or controlling the opening and closing of the electronic expansion valve.

Here, the spring 70 forms a moving trajectory of the slip ring 21.

As shown in FIGS. 1 and 2, the electronic expansion valve further includes a magnetic rotor 90, and the magnetic rotor 90 is rotatably provided in the valve body 10 and is drivenly connected to the connecting cylinder 31.

Optionally, the inner peripheral wall of the magnetic rotor 90 is provided with a first locking structure, the outer peripheral wall of the connecting cylinder 31 is provided with a second locking structure, and the magnetic rotor 90 is a plastic drive member. The first locking structure and the second locking structure are locked and engaged so as to move 30 and rotate synchronously.

As shown in FIGS. 3 and 5, the first locking structure is a locking projection 91 protruding from the inner peripheral wall of the magnetic rotor 90, and the second locking structure is on the outer peripheral wall of the connecting cylinder 31. It is a locking groove 313 to be opened.

The operating principle of the electronic expansion valve provided by this application is as follows. The screw 80 and the nut seat 60 are screw-engaged, and the connecting cylinder 31, the pressing portion 32, the screw sleeve 40 and the screw 80 are driven by the magnetic rotor 90 to rotate synchronously and have a vertical displacement. Then, the protruding portion 212 of the limiting member 20 rotates under the pressing action of the pressing portion 32 and has a vertical displacement, and the limiting member 20 moves along the vertical direction between the two limiting positions, in other words. Then, when the limiting member 20 moves to the limiting position, the pressing portion 32 cannot move the limiting member 20 and continue to move, that is, the limiting member 20 prevents the pressing portion 32 from continuing to move. This limits the screw 80 from continuing to move.

As shown in FIGS. 1 and 6, the electronic expansion valve further includes a pressing sheet 100, the pressing sheet 100 includes a pressing sheet main body 101 and a plurality of stop sheets 103, and the pressing sheet main body 101 has an avoidance opening 102. A plurality of stop sheets 103 are provided at intervals along the circumferential direction of the avoidance opening 102, an avoidance space 104 is formed between the plurality of stop sheets 103, and the screw sleeve 40 is a connection cylinder. A plurality of stop sheets 103, including a mounting segment 41 and a stop segment 42 which are sequentially connected in a direction away from 31 are fitted to the screw sleeve 40 via an avoidance space 104 after deformation, and after recovery from deformation. The magnetic rotor 90 and one end of the connecting cylinder 31 separated from the screw sleeve 40 are abutted by the step structure 110 so as to be magnetically engaged between the magnetic rotor 90 and the connecting cylinder 31. It prevents relative oscillation from occurring along the axial direction of the rotor 90. In this way, the magnetic rotor 90 is fixedly connected to the plastic drive member 30 by the pressing sheet 100 and the step structure 110.

In one embodiment (not shown) of the present application, a weight loss notch extending along the axial direction of the connecting cylinder 31 is provided on the end surface of one end of the connecting cylinder 31 in the axial direction. As described above, on the premise of ensuring the structural stability of the plastic drive member 30, a weight loss notch extending along the axial direction of the connecting cylinder 31 is provided on the end surface of one end of the connecting cylinder 31 in the axial direction. This is advantageous in saving raw materials and in reducing the production cost of the plastic drive member 30.

Example 2
As shown in FIGS. 7 to 10, in the second embodiment, the limiting member 20 is the slip ring 21, and the slip ring 21 is the slip ring main body 211 and the outer peripheral surface of the slip ring main body 211. The plastic drive member 30 includes the connection cylinder 31, and the end face of one end of the connection cylinder 31 in the axial direction has a notch 311 extending along the axial direction of the connection cylinder 31. It is opened, and the protrusion 212 is located in the notch 311. The connection cylinder 31 is different in that the protrusion 212 is pressed and rotated while being rotated. As described above, on the premise of ensuring the structural stability of the plastic drive member 30, a notch 311 extending along the axial direction of the connecting cylinder 31 is provided on the end surface of one end of the connecting cylinder 31 in the axial direction. It is advantageous to save raw materials and to reduce the production cost of the plastic drive member 30.

In the alternative embodiment shown in FIGS. 8 and 9, a notch 311 extending along the axial direction of the connecting cylinder 31 is provided on the end surface of one end of the connecting cylinder 31 away from the screw sleeve 40.

Optionally, there are at least two notches 311 and at least two notches 311 spaced along the circumferential direction of the connecting tube 31 to form at least two convex ribs. The side wall surface of the convex rib is used to press and rotate the protrusion 212.

Optionally, there are at least two notches 311 and at least two notches 311 are provided at equal intervals along the circumferential direction of the connecting cylinder 31.

When there are two notches 311, the two notches 311 are provided symmetrically at intervals along the circumferential direction of the connecting cylinder 31.

In the alternative embodiments shown in FIGS. 8 and 9, there are three notches 311 that form three evenly spaced ribs, the protrusion 212 inside one of the three notches 311. Selectively extend to.

As shown in FIGS. 9 and 10, in order to enable the plastic drive member 30 to be stably connected to the magnetic rotor 90, a step is provided between the magnetic rotor 90 and one end of the connection cylinder 31 close to the screw sleeve 40. The structure 110 abuts against each other to prevent a relative swing between the magnetic rotor 90 and the connecting cylinder 31 along the axial direction of the magnetic rotor 90.

Example 3
As shown in FIGS. 11 and 12, as compared with the first embodiment, the limiting member 20 is a slip ring 21, and the slip ring 21 is provided so as to project from the slip ring main body 211 and the outer peripheral surface of the slip ring main body 211. The plastic drive member 30, including the protrusion 212, includes the connecting cylinder 31 and the accommodating groove 312 provided on the inner wall surface of the connecting cylinder 31, and the slip ring 21 is rotatably provided in the connecting cylinder 31. The protrusion 212 is different in that it extends into the accommodation groove 312 so that the slip ring 21 rotates with the plastic drive member 30. In this way, the protrusion 212 extends into the accommodation groove 312, and the groove side wall of the accommodation groove 312 presses and moves the protrusion 212, whereby the plastic drive member 30 moves the limiting member 20. It is possible to move between the two restricted positions.

In Example 3, the accommodating groove 312 and the overhanging portion 212 are controlled to fit, i.e., have a relatively small engaging gap between the groove side wall of the accommodating groove 312 and the overhanging portion 212, thereby limiting. The control accuracy for controlling the rotation of the member 20 is improved.

In this application, the structure of the electronic expansion valve is rationally optimized, the entire plastic drive member 30 is located inside the magnetic rotor 90, and the spring 70 as a slip ring trajectory is also entirely inside the magnetic rotor 90. The structure of the electronic expansion valve in the height direction is sufficiently compacted by this, and at the same time, the limiting member 20 is driven and rotated by the plastic drive member 30 to reduce the usage noise of the electronic expansion valve. Improves the likability of the experience of using the electronic expansion valve.

Optionally, the deflection angle between the two groove sidewalls of the accommodating groove 312 is less than or equal to 10 times the pulse angle of the magnetic rotor 90, that is, the difference in pulse angle between forward and reverse rotation of the slip ring 21 is 10 pulses. In other words, when the magnetic rotor 90 moves the plastic drive member 30 to rotate forward or reverse, the slip ring 21 can be quickly pressed and rotated, and the magnetic rotor in opening and closing the electronic expansion valve. The number of rotations of 90 and the flow rate curve basically match.

Optionally, the angle between the two groove sidewalls of the accommodating groove 312 is not an integral multiple of the pulse angle of the magnetic rotor 90. In this way, when the magnetic rotor 90 moves and rotates the plastic drive member 30, the plastic drive member 30 does not directly hit the slip ring 21, so that the slip ring is prevented from being damaged and the inertia of the magnetic rotor 90 is prevented. The slip ring 21 is moved and rotated by utilizing the above, and the driving force required when the electronic expansion valve is opened is reduced.

It should be noted that the terms used herein are for illustration purposes only and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless otherwise explicitly stated in the context, the singular form is also intended to include multiple forms, and the terms "include" and / or "include" are used herein. When used, it should also be understood to mean the presence of features, steps, operations, devices, assemblies and / or combinations thereof.

Unless otherwise specifically described, the relative arrangements, mathematical formulas and numerical values of the members and steps described in these examples do not limit the scope of the present invention. At the same time, for convenience of explanation, it should be understood that the dimensions of each part shown in the drawings are not drawn in actual ratio relations. Detailed description of techniques, methods and equipment known to those of skill in the art may be omitted, but if necessary, such techniques, methods and equipment should be considered as part of the approved specification. .. All examples presented and described here should be construed as being exemplary and not limiting. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar signs and letters represent similar things in the drawings below, so once one is defined in one drawing, it does not need to be further described in subsequent drawings. be.

In the description of the present invention, the orientation or position represented by directional terms such as "front, back, top, bottom, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom". The relationships are generally based on the orientations or positional relationships shown in the drawings, but these orientations are for the sake of facilitation and brevity of the present invention and, in the absence of the opposite explanation, these orientations. The term is intended to limit the scope of protection of the invention as it does not necessarily indicate or imply that the indicated device or element has a particular orientation or is configured and operated in a particular orientation. It should not be understood, the directional term "inside, outside" is inside, outside with respect to the contour of each member itself.

For convenience of explanation, one device as shown in the figure, using spatial relative terms such as "above ...", "above ...", "on top of ...", "above", etc. Alternatively, the spatial positional relationship between the feature and another device or feature can be explained. It should be understood that the spatial relative terminology is intended to include different orientations during use or operation other than the orientations shown in the device diagram. For example, when a device in a drawing is inverted upside down, a device described as "above another device or structure" or "on top of another device or structure" is subsequently described as "on top of another device or structure". It will be positioned "down" or "under other device or structure". Thus, the exemplary term "above ..." can include two orientations, "above ..." and "below ...". The device can also be positioned in other different ways (rotated 90 degrees or located in other orientations) and have corresponding interpretations of the relative description of space used herein.

Furthermore, it should be explained that limiting the parts using terms such as "first" and "second" is only for distinguishing the corresponding parts, and unless otherwise specified, the above is mentioned. The term has no special meaning and should not be understood as limiting the scope of protection of the invention.

It should be noted that the terms used herein are for illustration purposes only and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless otherwise explicitly stated in the context, the singular form is intended to include multiple forms, and the terms "include" and / or "include" are used herein. When used, it should also be understood to mean the presence of features, steps, actions, devices, assemblies and / or combinations thereof.

It should be explained that the description of the present application, the scope of claims and the terms such as "first" and "second" in the above drawings are for distinguishing similar objects, and are in a specific order or. It does not need to be used to explain the order before and after. It should be understood that the data used in this way can be replaced as needed so that the embodiments of the present application described herein can be carried out in an order other than that shown or described herein. ..

The above description is merely a preferred embodiment of the present invention, and is not intended to limit the present invention. For those skilled in the art, the present invention can be modified and changed in various ways. Any modifications, equivalent substitutions, improvements, etc. made within the gist and principles of the invention should be included within the scope of the invention.

Claims (10)

Valve body (10) and
A limiting member (20) that is rotatably provided in the valve body (10), has a vertical displacement at the same time as rotating, and has two limiting positions in the vertical direction.
A plastic drive member (30) provided in the valve body (10) and connected to the limiting member (20) to move the limiting member (20) to rotate between the two limiting positions.
A magnetic rotor (90) rotatably provided in the valve body (10) and drivenly connected to the plastic drive member (30), wherein the entire plastic drive member (30) is described. An electronic expansion valve comprising a magnetic rotor (90) located within the magnetic rotor (90). The limiting member (20) is a slip ring (21), and the slip ring (21) is provided so as to project from the slip ring main body (211) and the outer peripheral surface of the slip ring main body (211). Including (212)
The plastic drive member (30) includes a connection cylinder (31) and a pressing portion (32) projecting from the inner wall surface of the connection cylinder (31), and the slip ring (21) is the connection. According to claim 1, the pressing portion (32) is rotatably provided in the cylinder (31), and the pressing portion (32) is brought into contact with the protruding portion (212) to press and rotate the slip ring (21). The electronic expansion valve described. The limiting member (20) is a slip ring (21), and the slip ring (21) is provided so as to project from the slip ring main body (211) and the outer peripheral surface of the slip ring main body (211). The plastic drive member (30) includes the connection cylinder (31), and the end surface of one end of the connection cylinder (31) in the axial direction is along the axial direction of the connection cylinder (31). The electronic expansion valve according to claim 1, wherein an extending notch (311) is opened. If there are at least two notches (311) and there are two notches (311), the two notches (311) are spaced along the circumferential direction of the connecting tube (31). The electronic expansion valve according to claim 3, which is symmetrically provided. The limiting member (20) is a slip ring (21), and the slip ring (21) is provided so as to project from the slip ring main body (211) and the outer peripheral surface of the slip ring main body (211). Including the protrusion (212)
The plastic drive member (30) includes a connection cylinder (31) and an accommodation groove (312) provided on an inner wall surface of the connection cylinder (31), and the slip ring (21) is the connection cylinder (21). 31) The protrusion (212) is rotatably provided and extends into the accommodation groove (312) such that the slip ring (21) rotates with the plastic drive member (30). The electronic expansion valve according to 1. The electronic expansion valve further includes a screw sleeve (40), which is made of a metallic material and is fitted and connected to the connecting cylinder (31) by an injection process, and the connecting cylinder (31). ), The electronic expansion valve according to any one of claims 2 to 5. 6. The electronic expansion valve described. A valve core (50) movably provided at the valve port (11) of the valve body (10),
A connection segment (61) and a support segment (62) connected to each other are included, the connection segment (61) extends into the connection tube (31), and the slip ring (21) is of the connection segment (61). The nut seat (60) fitted on the outer peripheral side and
A spring (70) fitted on the outer peripheral side of the connection segment (61) and abutted between the slip ring (21) and the support segment (62).
The nut seat (60) is rotatably provided, the first end extends into the screw sleeve (40) and is connected to the screw sleeve (40), and the second end is the valve core (50). Further includes a screw (80) that is drivenly connected to the
The magnetic rotor (90) is drivenly connected to the connection cylinder (31), and a first locking structure is provided on the inner peripheral wall of the magnetic rotor (90), and the connection cylinder (31) is provided. A second locking structure is provided on the outer peripheral wall of the above, and the magnetic rotor (90) moves the plastic driving member (30) to rotate in synchronization with the first locking structure. The electronic expansion valve according to claim 6, which is locked and engaged with the second locking structure. The first locking structure is a locking projection (91) provided so as to project from the inner peripheral wall of the magnetic rotor (90), and the second locking structure is the outer periphery of the connecting cylinder (31). The electronic expansion valve according to claim 8, which is a locking groove (313) formed in a wall. Further including a pressing sheet (100),
The pressing sheet (100) is
The pressing sheet body (101) having the avoidance opening (102) and
A plurality of stop sheets (103) provided at intervals along the circumferential direction of the avoidance opening (102), and an avoidance space (104) is formed between the plurality of stop sheets (103). Including a plurality of stop sheets (103) to be
The screw sleeve (40) includes a mounting segment (41) and a fastening segment (42) that are sequentially connected along a direction away from the connecting cylinder (31), and the plurality of fastening sheets (103) are After the deformation, it is fitted onto the screw sleeve (40) via the avoidance space (104), and after recovering from the deformation, it is stopped and engaged with the stop segment (42).
The magnetic rotor (90) and the connecting cylinder (31) are butted by a step structure (110), and the magnetic rotor (90) is placed between the magnetic rotor (90) and the connecting cylinder (31). 90) The electronic expansion valve according to claim 8, which prevents the occurrence of relative fluctuation along the axial direction of 90).

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