JP7223836B2 - electronic expansion valve - Google Patents

Description

The present invention relates to the technical field of valves, and in particular to electronic expansion valves.

In the related art, an electronic expansion valve includes a valve body, a screw, a limiting member rotatably provided in the valve body and having a vertical displacement while rotating and having two vertical limiting positions; a drive member for driving the limit member to move between two limit positions thereby limiting the travel stroke of a screw connected to the drive member.

However, the driving member and the restricting member in the related art are both made of metal material, and the collision between the driving rod and the restricting member will generate noise, which reduces the user experience of the electronic expansion valve.

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

In order to achieve the above object, the present invention provides a valve body, a restriction member rotatably provided in the valve body and having vertical displacement while rotating and having two restriction positions in the vertical direction; a plastic drive member provided within the valve body and connected to the limit member for moving the limit member to rotate between two limit positions; and a plastic drive member rotatably provided within the valve body and drivingly connected to the plastic drive member. a gyromagnetic member in which the entirety of the plastic drive member is located within the gyromagnetic member.

Further, the restricting member is a slip ring, and the slip ring includes a slip ring body and a protrusion protruding from the outer peripheral surface of the slip ring body, and the plastic driving member includes a connecting tube and an inner wall surface of the connecting tube. The slip ring is rotatably provided in the connecting cylinder, and the pressing part abuts against the projection to press and rotate the slip ring.

Further, the restricting member is a slip ring, the slip ring includes a slip ring body and a protrusion protruding from the outer peripheral surface of the slip ring body, the plastic driving member includes a connecting tube, and the axial direction of the connecting tube is A notch extending along the axial direction of the connecting tube is formed in the end face of one end of the connecting tube.

Furthermore, there are at least two notches, and when there are two notches, the two notches are provided symmetrically and spaced apart along the circumferential direction of the connecting tube. Further, the restricting member is a slip ring, and the slip ring includes a slip ring body and a protrusion protruding from the outer peripheral surface of the slip ring body, and the plastic driving member includes a connecting tube and an inner wall surface of the connecting tube. The slip ring is rotatably mounted within the connecting tube and the projection extends into the receiving groove to allow the slip ring to rotate with the plastic drive member.

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

Furthermore, a notch extending along the axial direction of the connecting cylinder is formed in the end face of the connecting cylinder at one end away from the screw sleeve.

Further, the electronic expansion valve includes a valve core movably provided in the valve port of the valve body, a connection segment and a support segment that are connected to each other, the connection segment extends into the connection cylinder, and the slip ring is the connection segment a nut seat fitted on the outer peripheral side of the connecting segment; a spring fitted on the outer peripheral side of the connection segment and abutting between the slip ring and the support segment; a screw having an end extending into and connected to the screw sleeve and a second end drivingly connected to the valve core; the magnetic rotor drivingly connected to the connecting barrel; The inner peripheral wall of the rotor is provided with a first locking structure, the outer peripheral wall of the connecting tube is provided with a second locking structure, and the magnetic rotor drives the plastic driving member to rotate synchronously. As such, the first locking structure and the second locking structure are in locking engagement.

Furthermore, the first locking structure is a locking projection protruding from the inner peripheral wall of the magnetic rotor, and the second locking structure is a locking groove formed in the outer peripheral wall of the connecting tube.

Furthermore, the electronic expansion valve further includes a press sheet, the press sheet being a press sheet main body in which the avoidance opening is formed, and a plurality of stop sheets provided at intervals along the circumferential direction of the avoidance opening, a plurality of stop sheets in which avoidance spaces are formed between the plurality of stop sheets; the screw sleeve includes a mounting segment and a stop segment that are sequentially connected along a direction away from the connecting cylinder; After being deformed, the sheet is fitted onto the screw sleeve via the avoidance space, and after recovering from the deformation, the sheet is engaged with the stop segment, and the magnetic rotor and the connecting tube are butted against each other by a stepped structure to form the magnetic rotor. and a connecting cylinder along the axial direction of the magnetic rotor.

Applying the technical form of the present invention, a plastic driving member is provided, which generates noise when colliding with the limiting member when driving the limiting member to move it between the two limiting positions. In addition, all the plastic driving members are located in the magnetic rotor, so that the structure in the height direction of the electronic expansion valve is sufficiently compact.

The drawings in the specification, which form part of this application, are for the purpose of providing a further understanding of the invention, and the schematic embodiments of the invention and their description are for the purpose of interpreting the invention. and should not unduly limit the invention.

1 shows a schematic structural diagram of an electronic expansion valve according to Example 1 of the present invention; FIG. FIG. 2 shows a schematic structural view of the engagement of the plastic drive member and the slip ring of the electronic expansion valve of FIG. 1; Fig. 2 shows an angular schematic structural view of the screw sleeve and plastic drive member of the electronic expansion valve of Fig. 1; FIG. 2 shows a schematic structural view of another angle of the screw sleeve and the plastic drive member of the electronic expansion valve of FIG. 1; FIG. 2 shows a schematic structural diagram of a magnetic rotor of the electronic expansion valve of FIG. 1 ; FIG. 2 shows a schematic structural diagram of a pressing seat of the electronic expansion valve of FIG. 1; Fig. 2 shows a schematic structural diagram of engagement between a plastic driving member and a slip ring according to Embodiment 2 of the present invention; FIG. 8 shows a schematic structural diagram of the screw sleeve, plastic drive member, magnetic rotor and pressing sheet of the electronic expansion valve of FIG. 7; FIG. 9 shows a schematic structural diagram of the screw sleeve and the plastic drive member in FIG. 8; FIG. 9 shows a schematic structural diagram of the magnetic rotor in FIG. 8 ; FIG. 4 shows a schematic structural diagram of engagement between a plastic drive member and a slip ring of an electronic expansion valve according to Embodiment 3 of the present invention; FIG. 12 shows a schematic structural diagram of the screw sleeve and plastic drive member of the electronic expansion valve of FIG. 11;

Here, the above drawings include the following reference numerals.
Reference Signs List 10 valve body, 11 valve port, 20 restricting member, 21 slip ring, 211 slip ring body, 212 protrusion, 30 plastic driving member, 31 connecting cylinder, 32 pressing portion, 311 notch, 312 housing groove, 313 locking groove , 40 screw sleeve, 41 attachment 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 projection, 100 pressing seat, 101 Pressing sheet main body 102 Avoidance opening 103 Stopping sheet 104 Avoidance space 110 Step structure.

Hereinafter, the technical modes in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention. is clearly not an embodiment of The following description of at least one exemplary embodiment is merely exemplary in nature and is not intended to be any limitation on the invention and its application or use. Based on the embodiments in the present invention, all other embodiments obtained by persons skilled in the art without creative efforts shall fall within the protection scope of the present invention.

In order to solve the problem that the driving member in the prior art is made of metal material, and the collision between the driving member and the restricting member generates noise, which reduces the favorable experience of using the electronic expansion valve. , offers electronic expansion valves.

The present application provides three specific examples, which are described in detail below. 1 to 6 show schematic structural diagrams of the electronic expansion valve of the first embodiment, FIGS. 7 to 10 show schematic structural diagrams of the electronic expansion valve of the second embodiment, and FIGS. 8 shows a schematic structural diagram of an electronic expansion valve of Example 3. FIG.

Example 1
As shown in FIGS. 1 to 6, the electronic expansion valve includes a valve body 10, which is rotatably mounted in the valve body 10 and has a vertical displacement at the same time as it rotates, and two limit positions in the vertical direction. a plastic drive member 30 provided in the valve body 10 and connected to the restriction member 20 for moving the restriction member 20 to rotate it between two restricted positions; a magnetic rotor 90 rotatably mounted and drivingly connected to the plastic drive member 30 , the entirety of the plastic drive member 30 being located within the magnetic rotor 90 ;

In the present application, a plastic drive member 30 is provided, which is less noisy when colliding with the limit member 20 when driving the limit member 20 to move it between the two limit positions. , the use experience of the electronic expansion valve is improved, and the plastic driving member 30 is all located in the magnetic rotor 90, so that the structure in the height direction of the electronic expansion valve is sufficiently compact.

As shown in FIG. 2, the limiting member 20 is a slip ring 21. The slip ring 21 includes a slip ring body 211 and a protrusion 212 protruding from the outer peripheral surface of the slip ring body 211. 30 includes a connecting tube 31 and a pressing portion 32 protruding from the inner wall surface of the connecting tube 31 . It abuts and presses the slip ring 21 to rotate it. In this manner, the connecting tube 31 and the pressing portion 32 rotate synchronously, and the pressing portion 32 presses the projecting portion 212 so that the slip ring 21 is moved by the plastic driving member 30 to rotate and rotate vertically. It has a directional displacement, which allows it to move between two limit positions.

As shown in FIGS. 1, 3 and 4, the electronic expansion valve further includes a screw sleeve 40, which is made of metal material and fitted and connected to the connecting cylinder 31 by an injection process. Located at one end of the tube 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 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 that are connected to each other, the connection segment 61 extends into the connection tube 31, the slip ring 21 is fitted around the outer peripheral side of the connection segment 61, and is a spring. A screw 80 is rotatably provided on the nut seat 60, and a first end of the screw 80 is fitted on the outer peripheral side of the connecting segment 61 and abutted between the slip ring 21 and the support segment 62. Extending through sleeve 40 and connected to screw sleeve 40 , the second end of screw 80 is drivingly connected to valve core 50 . The screw 80 is used to drive the valve core 50 to move it to the position of the valve port 11, thereby controlling the opening and closing of the electronic expansion valve or controlling the degree of opening of the electronic expansion valve.

Here, the spring 70 forms the movement track of the slip ring 21 .

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

Alternatively, the inner peripheral wall of the magnetic rotor 90 is provided with a first locking structure, the outer peripheral wall of the connecting tube 31 is provided with a second locking structure, and the magnetic rotor 90 is a plastic driving member. The first locking structure and the second locking structure are lockingly engaged to move 30 and rotate in synchronism.

As shown in FIGS. 3 and 5, the first locking structure is a locking projection 91 projecting from the inner peripheral wall of the magnetic rotor 90, and the second locking structure is the outer peripheral wall of the connecting tube 31. A locking groove 313 is opened.

The working principle of the electronic expansion valve provided by the present application is as follows. The screw 80 and the nut seat 60 are screwed together, and the magnetic rotor 90 drives the connecting tube 31, the pressing portion 32, the screw sleeve 40 and the screw 80 to rotate synchronously and displace in the vertical direction. and the protrusion 212 of the limiting member 20 rotates under the pressing action of the pressing portion 32 to have a vertical displacement, and the limiting member 20 moves along the vertical direction between the two limiting positions, in other words Then, when the restricting member 20 moves to the restricting position, the pressing portion 32 cannot move the restricting member 20 to keep it moving. 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 body 101 and a plurality of stop sheets 103 , and the pressing sheet body 101 has avoidance openings 102 . A plurality of stop sheets 103 are provided at intervals along the circumferential direction of the avoidance opening 102, avoidance spaces 104 are formed between the plurality of stop sheets 103, and the screw sleeve 40 is connected to the connecting cylinder. A plurality of stop sheets 103 are fitted onto the screw sleeve 40 through avoidance spaces 104 after deformation, and after recovering from deformation, the plurality of stop sheets 103 are fitted onto the screw sleeve 40 via avoidance spaces 104 after deformation. The magnetic rotor 90 and one end of the connecting tube 31 away from the screw sleeve 40 are abutted by a stepped structure 110 to provide a magnetic field between the magnetic rotor 90 and the connecting tube 31 . To prevent relative rocking from occurring along the axial direction of the rotor 90 . Thus, the magnetic rotor 90 is fixedly connected to the plastic driving member 30 by the pressing sheet 100 and the stepped structure 110 .

In one embodiment (not shown) of the present application, a weight reduction notch extending along the axial direction of the connecting tube 31 is formed in the end surface of one axial end of the connecting tube 31 . As described above, on the premise of ensuring the structural stability of the plastic driving member 30, a notch for weight reduction extending along the axial direction of the connecting tube 31 is formed in the end surface of one end of the connecting tube 31 in the axial direction. , which is advantageous in saving raw materials and in reducing the production costs of the plastic drive member 30 .

Example 2
As shown in FIGS. 7 to 10, the second embodiment differs from the first embodiment in that the restricting member 20 is a slip ring 21, and the slip ring 21 includes a slip ring main body 211 and an outer peripheral surface of the slip ring main body 211. The plastic drive member 30 includes a connection tube 31, and a notch 311 extending along the axial direction of the connection tube 31 is formed on the end surface of one axial end of the connection tube 31. The protrusion 212 is located in the notch 311, and the connecting tube 31 rotates while pressing the protrusion 212 to rotate. In this way, on the premise of ensuring the structural stability of the plastic driving member 30, a notch 311 extending along the axial direction of the connecting tube 31 is formed in the end face of one end of the connecting tube 31 in the axial direction. , which is advantageous in saving raw materials and in reducing the production cost of the plastic driving member 30 .

In the alternative embodiment shown in FIGS. 8 and 9, a notch 311 extending along the axial direction of the connecting tube 31 is formed in the end face of the connecting tube 31 away from the screw sleeve 40 .

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

Alternatively, there are at least two notches 311 , and the at least two notches 311 are provided at regular intervals along the circumferential direction of the connecting tube 31 .

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

In an alternative embodiment shown in FIGS. 8 and 9, the notches 311 are three, thereby forming three evenly spaced ribs, and the projection 212 is located inside one of the three notches 311. selectively extends into

As shown in FIGS. 9 and 10, in order to stably connect the plastic driving member 30 to the magnetic rotor 90, the magnetic rotor 90 and one end of the connecting tube 31 close to the screw sleeve 40 are stepped. The structure 110 abuts against the magnetic rotor 90 and the connecting tube 31 to prevent relative rocking along the axial direction of the magnetic rotor 90 .

Example 3
As shown in FIGS. 11 and 12, the restricting member 20 is a slip ring 21, and the slip ring 21 is a slip ring main body 211 and the slip ring main body 211. The plastic driving member 30 includes a connecting tube 31 and a receiving groove 312 formed in the inner wall surface of the connecting tube 31, and the slip ring 21 is rotatably provided in the connecting tube 31, The protrusion 212 differs in that it extends into the receiving groove 312 to allow the slip ring 21 to rotate with the plastic drive member 30 . In this way, the projection 212 extends into the receiving groove 312 such that the groove sidewalls of the receiving groove 312 force the projection 212 to move, thereby causing the plastic drive member 30 to move the limiting member 20. to move between two limit positions.

In the third embodiment, the receiving groove 312 and the protrusion 212 are controlled to match, i.e., have a relatively small engagement gap between the groove side wall of the receiving groove 312 and the protrusion 212, thereby limiting Control accuracy for controlling the rotation of the member 20 is improved.

In the present application, the structure of the electronic expansion valve is rationally optimized, the entire plastic driving member 30 is located inside the magnetic rotor 90, and the spring 70 as the slip ring raceway is also entirely inside the magnetic rotor 90. This makes the structure of the electronic expansion valve sufficiently compact in the height direction, and at the same time, the plastic driving member 30 drives and rotates the limiting member 20 to reduce the operating noise of the electronic expansion valve, Improved the positive experience of using the electronic expansion valve.

Optionally, the included angle between the two groove sidewalls of the receiving groove 312 is less than ten times the pulse angle of the magnetic rotor 90, that is, the pulse angle difference in the forward or reverse rotation of the slip ring 21 is 10 pulses. In other words, when the magnetic rotor 90 moves the plastic driving member 30 to rotate forward or backward, 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 curves are basically the same.

Alternatively, the included angle between the two groove sidewalls of the receiving groove 312 is not an integer multiple of the pulse angle of the magnetic rotor 90 . In this way, when the magnetic rotor 90 moves the plastic drive member 30 to rotate, the plastic drive member 30 does not hit the slip ring 21 directly, thus avoiding damage to the slip ring and reducing the inertia of the magnetic rotor 90. is used to move the slip ring 21 into rotation, reducing the drive force required to open the electronic expansion valve.

It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, unless the context clearly dictates otherwise, singular forms are also intended to include plural forms, and further, as used herein, the terms "include" and/or "include" It should also be understood that when used, features, steps, operations, devices, assemblies and/or combinations thereof are meant to be present.

Unless specifically stated otherwise, the relative arrangements, formulas and numerical values of the members and steps described in these examples are not intended to limit the scope of the invention. At the same time, it should be understood that for convenience of explanation, the dimensions of the parts shown in the drawings are not drawn to scale. Techniques, methods and equipment known to those skilled in the art may not be described in detail, but where appropriate, such techniques, methods and equipment should be considered part of the approved specification. . All examples shown and described herein should be construed as illustrative only and not limiting of any specific values. Accordingly, other examples of the illustrative embodiment may have different values. It should be noted that similar symbols and letters represent similar things in the following drawings, so that once something is defined in one drawing, it need not be further described in subsequent drawings. be.

In the description of the present invention, orientation or position expressed in azimuth terms such as "front, back, top, bottom, left, right", "lateral, longitudinal, vertical, horizontal" and "top, bottom", etc. Relationships are generally based on the orientation or positional relationship shown in the drawings, but are only for ease and brevity of the description of the invention, and unless indicated to the contrary, these orientations The terminology is intended to limit the scope of protection of the present invention, as the terms do not necessarily indicate or imply that the depicted device or element has a particular orientation or is configured and operated in a particular orientation. As should not be understood, the azimuth terms "inside out" are in and out relative to the contours of each member itself.

For convenience of explanation, spatially relative terms such as "on", "above", "on top of", "above", etc. are used herein to refer to a single device as shown in the figures. Or describe the spatial relationship of features to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations during use or operation other than the orientation depicted in the drawings of the device. For example, if a device in a drawing is turned upside down, a device described as "above another device or structure" or "on top of another device or structure" will then become "above another device or structure." "underneath" or "underneath other devices or structures". Thus, the exemplary term "above" can include the two orientations "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or positioned at other orientations) and corresponding interpretations of the relative spatial descriptions used herein can be made.

Further, it should be explained that the use of terms such as "first", "second", etc. to qualify parts is only for the purpose of distinguishing corresponding parts, and unless otherwise stated, The terms have no special meaning and should not be understood as limiting the scope of protection of the present invention.

It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms are intended to include the plural forms as well, unless the context clearly indicates otherwise, and further, as used herein, the terms "include" and/or "include" It should also be understood that when used, features, steps, acts, devices, assemblies and/or combinations thereof are meant to be present.

It should be explained that the terms "first", "second", etc. in the specification, claims and drawings of the present application are for the purpose of distinguishing similar objects, and are used in a specific order or It need not be used to describe the order before and after. It should be understood that the data used in this manner can be interchanged, if desired, so that the embodiments of the application described herein can be performed in an order other than that illustrated or described herein. .

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention, and various modifications and variations of the present invention are possible for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall all fall within the protection scope of the present invention.

Claims (10)

a valve body (10) in which a screw (80) is provided so as to be able to move up and down while rotating ;
A limiting member (20) rotatably mounted in the valve body (10) and having vertical displacement upon rotation and two limiting positions in the vertical direction , wherein the limiting member rotates a restricting member (20) that moves up and down while the screw (80) rotates and restricts the operation of the screw (80) when the screw (80) is in the restricting position;
a plastic drive member (30) provided within said valve body (10) and connected to said limit member (20) to move said limit member (20) to rotate between said two limit positions;
A magnetic rotor (90) rotatably mounted within said valve body (10) and drivingly connected to said plastic drive member (30), wherein said plastic drive member (30) as a whole is said located within the magnetic rotor (90), formed separately from the plastic driving member (30), and rotationally engaged with the plastic driving member (30) to drive the plastic driving member (30) in rotation; a mating magnetic rotor (90) ;
a screw sleeve (40) fixed to protrude from one end of the plastic drive member (30) and provided with the screw (80);
a pressing sheet (100) whose central portion is externally fitted on the portion of the screw sleeve (40) protruding from the plastic driving member (30) so as to press the magnetic rotor (90);
including
The gyromagnetic component ( 90) is pressed by the pressing sheet (100), and the magnetic rotor (90) and the plastic driving member (30) are abutted by stepped structures (110) respectively formed thereon. expansion valve. The limiting member (20) is a slip ring (21), and the slip ring (21) includes a slip ring body (211) and a protruding portion protruding from the outer peripheral surface of the slip ring body (211). (212) and
The plastic driving member (30) includes a connecting tube (31) and a pressing portion (32) protruding from an inner wall surface of the connecting tube (31),
The slip ring (21) is mounted to rotate and vertically displace between the two limit positions along a spring (70) provided in the connecting tube (31) as a moving rail. 2. The electronic expansion valve according to claim 1 , wherein the pressing portion (32) abutting the projection (212) presses and is driven to rotate. The limiting member (20) is a slip ring (21), and the slip ring (21) includes a slip ring body (211) and a protruding portion protruding from the outer peripheral surface of the slip ring body (211). (212) and
The plastic driving member (30) includes a connection tube (31), and a notch ( 311) is provided ,
The slip ring (21) is mounted to rotate and vertically displace between the two limit positions along a spring (70) provided in the connecting tube (31) as a moving rail. The electronic expansion valve of claim 1, wherein said projection (212) is engaged with said notch (311) and driven to rotate by said plastic drive member (30). There are at least two notches (311), and when there are two notches (311), the two notches (311) are spaced along the circumferential direction of the connecting tube (31). 4. The electronic expansion valve of claim 3, wherein the valve is symmetrically arranged at the The limiting member (20) is a slip ring (21), and the slip ring (21) is provided so as to protrude from a slip ring body (211) and an outer peripheral surface of the slip ring body (211). a protrusion (212);
The plastic driving member (30) includes a connecting tube (31) and a housing groove (312) provided on the inner wall surface of the connecting tube (31),
The slip ring (21) is mounted to rotate and vertically displace between the two limit positions along a spring (70) provided in the connecting tube (31) as a moving rail. 2. The electronic expansion valve of claim 1, wherein said protrusion (212) is engaged with said receiving groove (312) and driven to rotate by said plastic drive member (30) . 6. The screw sleeve (40) according to any one of claims 2 to 5, wherein the screw sleeve (40) is made of metal material, is fitted and connected to the connecting tube (31) by an injection process, and is located at one end of the connecting tube (31). 1. The electronic expansion valve according to claim 1. The screw sleeve (40) is located at one end of the connection cylinder (31),
5. The electronic expansion valve according to claim 3 , wherein the notch (311) is provided in an end face of one end of the connection cylinder (31) remote from the screw sleeve (40). The electronic expansion valve is
a valve core (50) movably provided in the valve port (11) of the valve body (10);
A nut seat (60) comprising a connecting segment (61) and a supporting segment (62) connected to each other, said connecting segment (61) extending into said connecting tube (31) and said slip ring (21) ) is a nut seat (60) fitted on the outer peripheral side of the connection segment (61) and
further comprising
The spring (70) is fitted on the outer peripheral side of the connection segment (61) and abuts between the slip ring (21) and the support segment (62),
The screw (80) is rotatably provided on the nut seat (60), the first end enters the screw sleeve (40) and is connected to the screw sleeve (40), and the second end is the screw sleeve (40). drivingly connected to the valve stem (50);
The magnetic rotor (90) is drivably connected to the connection tube (31), the inner peripheral wall of the magnetic rotor (90) is provided with a first locking structure, and the connection tube (31) is provided with a first locking structure. is provided with a second locking structure on the outer peripheral wall of the first locking structure so that the magnetic rotor (90) moves the plastic drive member (30) to rotate synchronously. 7. The electronic expansion valve of claim 6 in locking engagement with said second locking structure. The first locking structure is a locking protrusion (91) protruding from the inner peripheral wall of the magnetic rotor (90), and the second locking structure is an outer peripheral wall of the connecting tube (31). 9. Electronic expansion valve according to claim 8, which is a locking groove (313) provided in the wall. The pressing sheet (100) is
a pressing sheet body (101) having an avoidance opening (102);
A plurality of retaining sheets (103) spaced along the circumference of the avoidance opening (102), wherein avoidance spaces (104) are formed between the plurality of retaining sheets (103). and a plurality of stop sheets (103),
The screw sleeve (40) includes a mounting segment (41) and a stop segment (42) connected in sequence along the direction away from the connecting tube (31),
The plurality of stop sheets (103) are fitted onto the screw sleeve (40) through the avoidance space (104) after deformation, and are stopped and engaged with the stop segment (42) after recovery from deformation, and the The magnetic rotor (90) and the connection tube (31) are butted against each other by the stepped structure (110) so that the magnetic rotor (90) and the connection tube (31) are interposed between the magnetic rotor (90) and the connection tube (31). 90).The electronic expansion valve according to claim 8, which prevents occurrence of relative rocking along the axial direction of 90).

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