KR102138432B1 - Electric valve - Google Patents

Abstract

The electric valve includes a valve body, a valve seat, a slider, and a drive mechanism. The valve body has a first port, a second port and a third port. The valve seat is fixed inside the valve body, has a first through hole and a second through hole, the first through hole is a part of a flow path formed between the first port and the third port, and the second through hole is made of It is part of the flow path formed between the 2nd port and the 3rd port. The slider is located on the valve body, the slider is slide-fit with the valve seat, and the slider is rotatable relative to the valve seat, so that the slider completely covers the first through hole and the second through hole to communicate with the third port or the slider Allows the slider to cover a portion of the first through hole and a portion of the second through hole at the same time or to allow the slider to completely cover the second through hole and the first through hole to communicate with the third port. The driving device is driven so that the slider rotates. The structural design of the electric valve can effectively simplify the pipeline design.

Description

Electric valve {ELECTRIC VALVE}

The present invention relates to the technical field of refrigeration components, and more particularly to electric valves.

In air conditioning systems, two solenoid valves are generally used as control elements to change the flow path of the refrigerant, to achieve a switch between cooling and heating modes. However, in a vehicle air conditioner, since the vehicle space is limited, not only two solenoid valves occupy a large space, but also the control method of the air conditioner and the pipeline design are complicated.

In summary, a mechanical problem to be solved by those skilled in the art is to simplify the pipeline design efficiently.

In this regard, an electric valve is provided according to the present application, and the structural design of the electric valve can effectively simplify the pipeline design.

In order to realize the above object, the following technical solution is provided according to the present application.

Electric valve:

A valve body provided with a first port, a second port, and a third port;

As a valve seat, the valve seat is fixed in the valve body, the valve seat is provided with a first through hole and a second through hole, and the first through hole is formed between the first port and the third port A valve seat which is a part of the flow path to be formed, and wherein the second through hole is a part of a flow path formed between the second port and the third port;

As a slider, the slider is located inside the valve body, the slider is slide fit to the valve seat, and the slider is such that the slider completely covers the first through hole and the second The through-hole communicates with the third port, or the slider covers a portion of the first through-hole and the second through-hole simultaneously, or the slider completely covers the second through-hole and the first through A slider rotatable relative to the valve seat so that a hole communicates with the third port; And

And a driving device for driving the slider to rotate.

When using the electric valve herein, the drive device is driven so that the slider of the valve body rotates with respect to the valve seat, refrigerant flowing through the first and third ports, refrigerant flowing through the second and third ports, and the first Used to realize switching between three modes including the refrigerant flowing through the port, the second port, and the third port, and to switch between the cooling mode and the heating mode of the temperature control device by changing the flow path of the refrigerant do. The electric valve according to the present invention not only functionally replaces the three solenoid valves, but also realizes the adjustment of the flow rate ratio between the first through-hole and the second through-hole, making the piping design of the thermostat simpler and more compact. At the same time, it is advantageous to simplify the control strategy of the thermostat applying the electric valve.

BRIEF DESCRIPTION OF DRAWINGS To describe the embodiments of the present application more clearly, the drawings referenced to describe the embodiments or the prior art will be briefly described below. Apparently, the drawings in the following description are only a few embodiments of the present application, and other drawings can be obtained based on these drawings without creative work to those skilled in the art.
1 is a cross-sectional view of an electric valve according to an embodiment of the present invention.
2 is a schematic view showing an assembly of a valve seat and a valve body according to an embodiment of the present application.
3 is a partially enlarged view of the area A of FIG. 2.
4 is a schematic view of an assembly of a valve seat and a valve body from different angles, according to embodiments herein.
5 is a schematic diagram showing the structure of a valve seat according to an embodiment of the present application.
6 is a schematic diagram showing the structure of a slider according to an embodiment of the present application.
7 is a schematic view showing the structure of a slider viewed from another angle according to an embodiment of the present application.
8 is a schematic diagram showing cooperation between a slider and a valve seat according to an embodiment of the present application.
9 is a schematic diagram showing cooperation between a slider and a valve seat in a first mode of operation according to an embodiment of the present application.
10 is a schematic diagram showing cooperation between a slider and a valve seat in a second mode of operation according to an embodiment of the present application.
11 is a schematic diagram showing cooperation between a slider and a valve seat in a third mode of operation according to an embodiment of the present application.
12 is a schematic diagram showing the structure of a valve cover according to an embodiment of the present application.
13 is a schematic diagram showing the structure of a gear box according to an embodiment of the present invention.
14 is a schematic diagram showing the internal structure of a gear box according to an embodiment of the present application.
15 shows the state of the gearbox when the electric valve is in the first mode of operation according to an embodiment of the present invention.
16 shows the state in the gearbox when the electric valve is in a third mode of operation according to an embodiment of the invention.

Technical solutions in the embodiments of the present application will be described below in connection with the drawings in the embodiments of the present application. Apparently, the described embodiments are only a part of the embodiments of the present application, not all of the embodiments. Based on the embodiments herein, all other embodiments made by those skilled in the art without any creative effort fall within the protection scope of the present application.

See FIGS. 1 to 4. The electric valve according to the present application comprises a valve body 4, a valve seat 7, a slider 6 and a drive device 1. The valve body 4 is provided with a first port 4b, a second port 4c and a third port 4a. The first port 4b and the second port 4c can communicate with the third port 4a of the valve body 4, that is, the first flow path and the second flow path are inside the valve body 4. Provided, the first flow path connects the first port 4b and the third port 4a, and the second flow path connects the second port 4c and the third port 4a. The refrigerant may enter and exit the electric valve through the first port 4b and the third port 4a or through the second port 4c and the third port 4a.

The valve seat 7 is fixed inside the valve body 4, and the valve seat 7 is provided with a first through hole 7a and a second through hole 7b. The first through hole 7a is a part of the first flow path connecting the first port 4b and the third port 4a, and the second through hole 7b is the second port 4c and the third port ( It is part of the second flow path connecting 4a). The first through hole 7a is located in the first flow path. When the first through hole 7a is blocked, the refrigerant cannot flow through the first flow path, that is, after the first through hole 7a is blocked, the refrigerant is first port 4b and third port 4a The electric valve is no longer allowed through. The second through hole 7b is located in the second flow path. When the second through hole 7b is blocked, the refrigerant no longer flows through the second flow path, that is, even after the second through hole 7b is blocked, the refrigerant remains in the second port 4c and the third port 4a. The electric valve is no longer allowed through.

The slider 6 is also located inside the valve body 4, and the slider 6 and the valve seat 7 are slide-fitted. The slider 6 is rotatable relative to the valve seat 7 to realize the following three states. In the first state, the slider 6 completely covers the first through hole 7a, and the second through hole 7b communicates with the third port 4a; In the second state, the slider 6 simultaneously covers a part of the first through hole 7a and a part of the second through hole 7b, and in the third state, the slider 6 covers the second through hole 7b. Covered completely, the first through hole 7a communicates with the third port 4a. Each of these three states corresponds to three operating modes of the electric valve. In the first mode of operation, the slider 6 rotates to completely cover the first through hole 7a, and the second through hole 7b communicates with the third port 4a, wherein the refrigerant flows through the second flow path. Through, that is, the refrigerant flows through the second through hole 7b, and enters and exits the electric valve through the second port 4c and the third port 4a. In the second operation mode, the slider 6 rotates to simultaneously cover a portion of the first through hole 7a and a portion of the second through hole 7b, wherein the refrigerant covers both the first flow path and the second flow path. The refrigerant flows through both of the first through hole 7a and the second through hole 7b. At this time, by adjusting the rotation angle of the slider 6, the covered region of the first through hole 7a and the covered region of the second through hole 7b are adjusted, so that the first through hole 7a and the second through Adjustment of the flow rate ratio between the holes 7b can be realized. In the third mode of operation, the slider 6 rotates to completely cover the second through hole 7b, the first through hole 7a communicates with the third port 4a, where the refrigerant flows through the first flow path, The refrigerant flows through the first through hole 7a, and enters and exits the electric valve through the first port 4b and the third port 4a.

In the first mode of operation, communication between the second through hole 7b and the third port 4a includes two situations: a part of the second through hole 7b is covered or the second through hole 7b This is not covered. Similarly, in the third mode of operation, communication between the first through hole 7a and the third port 4a includes two situations: a part of the first through hole 7a is covered or the first through hole (7a) not covered.

The drive device 1 can drive the slider 6 to rotate relative to the valve seat 7 to achieve a transition between the three operating modes of the electric valve.

The first port 4b and the second port 4c can be embodied as the inlet or outlet of the electric valve. Similarly, the third port 4a can also be implemented as an inlet or outlet of an electric valve.

When using the electric valve herein, the drive device 1 drives the slider 6 of the valve body 4 to rotate relative to the valve seat 7, such that the first port 4b and the third port 4a Three refrigerants, including refrigerant flowing through the second port (4c) and the third port (4a), and refrigerant flowing through the first port (4b), the second port (4c) and the third port (4a) It is used to realize switching between modes, and to switch between the cooling mode and the heating mode of the temperature control device by changing the flow path of the refrigerant. The electric valve according to the present invention not only functionally replaces the two solenoid valves, but also realizes the adjustment of the flow rate ratio between the first through-hole 7a and the second through-hole 7b, thereby improving the piping design of the temperature control device. At the same time making it simple and compact, it is advantageous to simplify the control strategy of the thermostat applying the electric valve.

The electric valve may further include a gear box 3. 14 to 16, the gear box 3 includes a box body 3d, a position limiting device, and a gear set 3f arranged in the box body 3d. The driving device 1 drives the slider 6 to rotate through the gear box 3. The driving device 1 drives the gear set 3f of the gear box 3 to rotate to rotate the gear set 3f to drive the slider 6 to rotate. The driving device 1 may be implemented as an electric machine, and the output end 3e of the electric machine engages a gear in the gear box 3 to cause the electric machine to drive and operate the gear box 3.

The gear set 3f includes the first gear 3x, the second gear 3z, ... It includes an Nth gear, the first gear 3x meshes with the second gear 3z, and the N-1th gear meshes with the Nth gear. The output end of the electric machine rotates the first gear 3x, and the output of the Nth gear is the output end 3e of the gear box. By the action of the gear set 3f, the rotation speed of the output end of the electric machine can be adjusted, and at the same time, the torque of the electric machine can be adjusted. The input hole is opened in the box body 3d, and the output end of the electric machine passes through the input hole and extends into the box body 3d to rotationally drive the first gear 3x. The second gear 3z engaged with the first gear 3x is engaged with the output gear fixed to the first gear 3x, and has a different diameter or tooth number from the first gear 3x. The second gear 3z is included. The N-th gear meshing with the N-1-th gear includes an N-th gear meshing with an output gear fixed to the N-1-th gear and having a different diameter or tooth number than the N-1 gear.

In the above embodiment, when N>2, at least two gears of the gear set 3f are installed on the same gear shaft. When the gear set 3f includes three or more gears, the two gears can be installed on the same gear shaft, further simplifying the structure and saving space.

In this embodiment, N=4, and the gear set 3f includes the first gear 3x, the second gear 3z, the third gear 3m and the fourth gear 3g, where the fourth The gear is a stop gear. The gear shaft 3c includes a first gear shaft 3c1, a second gear shaft 3c2 and a third gear shaft 3c3. The first gear 3x and the third gear 3m are both installed on the first gear shaft 3c1, the second gear 3z is installed on the second gear shaft 3c2, and the fourth gear 3g Is installed on the third gear shaft 3c3.

The position limiting device includes a first stop rod 3a and a second stop rod 3b. The stop gear 3g of the gear set 3f cooperates with the first stop rod 3a and the second stop rod 3b, and the stop gear 3g rotates counterclockwise to turn the first stop rod 3a Adjacent to the stop gear 3g and the second stop rod 3b. The first stop rod 3a and the second stop rod 3b can prevent the stop gear 3g from continuously rotating. That is, after contacting the first stop rod 3a, the stop gear 3g cannot continue to rotate counterclockwise, and after contact with the second stop rod 3b, the stop gear 3g continues to rotate clockwise Can not.

The gear box 3 comprises at least one gear shaft 3c. In this embodiment, the gear shaft 3c includes a first gear shaft 3c1, a second gear shaft 3c2 and a third gear shaft 3c3. The electric valve further comprises a valve cover 2 fixedly connected to the valve body 4. The upper ends of the first stop rod 3a, the second stop rod 3b and/or the at least one gear shaft 3c protrude from the box body 3d. An insertion hole 2a is formed in the valve cover 2, and protrudes out of the box body 3d of the first stop rod 3a, the second stop rod 3b and/or at least one gear shaft 3c The parts to be inserted are inserted into the insertion hole 2 to fix the gear box 3 in the circumferential direction with respect to the valve cover 2 to further prevent the rotation of the entire gear box 3 as a whole. In order to improve the circumferential position limiting effect, in this embodiment, the first stop rod 3a, the second stop rod 3b, the first gear shaft 3c1 and the second gear shaft 3c2 are all box bodies ( 3d) is projected out and inserted into the insertion hole 2a of the valve cover 2, and the second gear shaft 3c3 does not protrude from the box body 3d. Of course, the third gear shaft 3c3 may also protrude out of the box body 3d and be inserted into the insertion hole 2a of the valve cover 2. Of course, it is also possible that a part of the gear shaft protrudes out of the box body 3d and is inserted into the insertion hole 2a of the valve cover 2. The portions protruding from the box body 3d of the first stop rod 3a, the second stop rod 3b, and/or the at least one gear shaft 3c, have a length of 2 mm to 4 mm, and protrude the protruding boss. Form each. In order to provide good support, the portions protruding from the box body 3d of the first stop rod 3a, the second stop rod 3b and/or the at least one gear shaft 3c are 3 mm, and the gear box ( It can be selected according to the size of 3) and the thickness of the valve cover 2.

In this embodiment, the valve cover 2 is fixed to the valve body 4 via the pressure block 13. The pressure block 13 is provided with an external thread, the valve body 4 is provided with an internal thread, the pressure block 13 is screwed with the valve body 4, and the pressure block 13 is a valve It is pressed against the valve cover 2 close to the body 4. Since the valve cover 2 cannot rotate relative to the valve body 4, the valve cover 2 may be fixedly connected to the valve body 4 by means of a positioning pin or a snap spring.

6, the side of the slider 6 adjacent to the valve seat 7 is provided with a working boss 6b and a supporting boss 6a, and both working boss 6b and supporting boss 6a are provided. The valve seat 7 and the slide are fitted. Referring to Fig. 8, when the slider 6 rotates relative to the valve seat 7, the working boss 6b can completely cover the first through hole 7a, or at the same time the first through hole 7a A part and a part of the second through hole 7b may be simultaneously covered, or the second through hole 7b may be completely covered. The heights of the work boss 6b and the support boss 6a are the same or substantially the same, that is, the work boss 6b is flush with the support boss 6a, and the work boss 6b and support are The protrusion height of the boss 6a is the same. In practice, this means that the supporting boss 6a may be slightly lower than the working boss 6b.

In the above embodiment, the working boss 6b and the supporting boss 6a are precisely fitted to the valve seat 7 at the same time, so that the bottom face of the slider 6 is entirely fitted to the valve body 7 Compared to the tailored solution, in this solution, the contact area between the valve seat 7 and the slider 6 is greatly reduced, so that the rotational load of the slider 6 is reduced, and the slider 6 uses a small electric machine. Can be rotated.

In particular, as shown in FIG. 6, the supporting boss 6a includes a strip-shaped boss, and the strip-shaped boss is symmetrically arranged along the longitudinal direction of the slider 6. In this embodiment, the supporting boss 6a may include two strip-shaped bosses arranged symmetrically along the longitudinal direction of the slider 6, of course the number of strip-shaped bosses is one or two It may be abnormal.

The working boss 6b may be a circular boss. In addition, the radius of the circular boss is larger than the radius of the first through hole 7a or the second through hole 7b by 1.6 mm to 2 mm, so that the work boss when the work bus 6b cooperates with the valve seat 7 It is ensured that (6b) can seal the first through hole 7a or the second through hole 7b. The size of the circular boss may be set according to the actual situation, but is not limited thereto.

The working boss 6b may also be other shapes such as a square boss, an irregular boss, and the like. In order to buffer the refrigerant in the valve body 4, a cavity is installed in the valve body 4, and the first port 4b, the second port 4c, and the third port 4a are all provided with a cavity. In communication, that is, the refrigerant entering the electric valve first flows into the cavity and flows out through the port. In particular, the cavity can be opened at the bottom of the valve body 4, but is not limited thereto.

1 and 2, the electric valve further includes a positioning shaft 5 fixedly connected to the valve body 4 and the valve seat 7, and the slider 6 has a positioning shaft 5 ) Is rotatably connected. As shown in Fig. 7, the valve seat 7 is provided with a positioning hole 7c, and the positioning shaft 5 passes through the positioning hole 7c and is fixed relative to the valve seat 7 . The slider 6 rotates around the positioning shaft 5 to achieve switching between the three operating modes of the electric valve. In particular, the positioning shaft 5 is an interference fit with the valve body 4 and the valve seat 7.

To improve the stability of the valve seat 7, as shown in Figs. 1 to 3, a compression ring 8 is disposed between the side wall of the valve seat 7 and the valve body 4. Specifically, an annular stepped portion is formed on the side wall of the valve seat 7, the compression ring 8 is disposed on the annular step portion, and the valve seat 7 and the valve body 4 are simultaneously The compression ring 8 is pressed to achieve relative fixation between the valve seat 7 and the valve body 4.

Also, to reduce vibration, a damping piece 9 is arranged between the valve seat 7 and the side of the compression ring 8, which is far from the slider 6.

As shown in Figs. 7 to 9, a blind hole 6e is provided on the side far from the valve seat 7 of the slider 6. In order to ensure that the slider 6 and the valve seat 7 are always precisely fitted to each other, an adjacent portion 63 is provided in the blind hole 6e, and one end of the adjacent portion 63 is a slider 6 ) Is adjacent to the bottom wall and the other end of the adjacent portion 63 is adjacent to the gear box 3. Therefore, the working boss 6b and the valve seat 7 are always in contact with each other through the adjacent portion 63. Since the adjoining portion 63 can be a compressive elastic member, the elastic force of the compressive elastic member can be used to ensure that the slider 6 fits precisely with the valve seat 7 under low or no pressure operating conditions.

In the above embodiment, the compression elastic member can be embodied as a compression spring and a steel ball, the compression spring is located entirely within the blind hole 6e, one end of the compression spring abuts the bottom wall of the blind hole 6e, The other end of the compression spring is a steel ball and at least a portion of the steel ball is recessed into the blind hole 6e. Of course, the compressive elastic member may be implemented in other structures not limited to the present application.

1 and 13, the side facing away from the valve seat 7 of the slider 6 and the output end 3e of the gear box 3 are fitted to each other through a key and a key slot. 7 and 8, in this embodiment, the slot 6d is opened on the side far from the valve seat 7 of the slider 6, and the output end 3e of the gear box 3 Is inserted into the slot 6d so that the slider 6 can be rotationally driven when the gear box 3 is operated. Further, the slider 6 is provided with a shaft hole 6c through which the positioning shaft 5 passes, the shaft hole 6c is disposed corresponding to the slot 6d, and the shaft hole 6c is provided with a slot 6d ).

The slot 6d of the slider 6 is specifically a waist-shaped hole, and the output end 3e of the gear box 3 is a waste-shaped protrusion. Of course, the slot 6d of the slider 6 may be a strip-shaped hole, and the output end 3e of the gear box 3 is a strip-shaped protrusion, but is not limited to this.

In another embodiment, the slider 6 is a ceramic slider and the valve seat 7 is a ceramic valve seat. Of course, the slider 6 and the valve seat 7 may be made of other materials, but are not limited to this.

Based on the electric valve provided in the above embodiment, a temperature regulating device according to the present invention is provided, which includes the electric valve of any of the above embodiments. In this embodiment, since the temperature control device uses an electric valve, the advantageous effect of the temperature control device can also be referred to in the above embodiment.

The above embodiments are described in a gradual manner. Each embodiment mainly focuses on explaining differences from other embodiments, and reference may be made between these embodiments for the same or similar parts of these embodiments.

Based on the above description of the disclosed embodiments, those skilled in the art can make or use the present application. It is apparent to those skilled in the art that many modifications are made to these examples. The general principles defined herein can be applied to other embodiments without departing from the spirit or scope of the present application. Accordingly, this application is not limited to the embodiments described herein, but should be defined by the broadest scope consistent with the principles and novel features disclosed herein.

1 Drive unit 2 Valve cover
2a insertion hole 3 gearbox
3a 1st stop rod 3b 2nd stop rod
3c gear shaft 3d box body
3e output end 3f gear set
4 valve body 4a 3rd port
4b 1st port 4c 2nd port
5 Positioning shaft 6 Slider
6a supporting boss 6b working boss
6c shaft hole 6d slot
6e blind hole 7 valve seat
7a 1st through hole 7b 2nd through hole
7c Positioning hole 8 Compression ring
9 Damping piece

Claims (10)

As an electric valve,
A valve body 4 provided with a first port 4b, a second port 4c and a third port 4a;
As a valve seat 7, the valve seat 7 is fixed in the valve body 4, and the valve seat 7 is provided with a first through hole 7a and a second through hole 7b, The first through hole 7a is a part of a flow path formed between the first port 4b and the third port 4a, and the second through hole 7b is connected to the second port 4c. A valve seat (7) that is a part of the flow path formed between the third ports (4a);
As a slider 6, the slider 6 is located inside the valve body 4, the slider 6 is slide fit to the valve seat 7, and the slider ( 6) is that the slider 6 completely covers the first through hole 7a and the second through hole 7b communicates with the third port 4a, or the slider 6 is the first To cover a part of one through-hole 7a and a part of the second through-hole 7b at the same time, or the slider 6 completely covers the second through-hole 7b and the first through-hole 7a The slider 6 rotatable with respect to the valve seat 7 so as to communicate with the third port 4a; And
And a driving device 1 for driving the slider 6 to rotate,
The electric valve further comprises a gear box 3, and the drive device 1 is configured to drive the slider 6 to rotate through the gear box 3; The gear box 3 includes a box body 3d, a position limiting device and a gear set 3f, and the position limiting device includes a first stop rod 3a and a second stop rod 3b, One gear in the gear set 3f is a stop gear 3g cooperating with the first stop rod 3a and the second stop rod 3b, and the stop gear 3g rotates to rotate the first stop An electric valve, configured to contact the rod (3a) and the second stop rod (3b). The electric valve according to claim 1, wherein the gear box (3) is disposed on the valve body (4). The method according to claim 2, wherein the gear box (3) includes at least one gear shaft (3c), the first stop rod (3a) and the upper end of the second stop rod (3b) is the box body (3d) Projecting out, or the upper ends of the first stop rod 3a, the second stop rod 3b and the at least one gear shaft 3c project out of the box body 3d;
The electric valve further includes a valve cover 2 fixedly connected to the valve body 4, the valve cover 2 is provided with insertion holes 2a, the first stop rod 3a and the Portions of the second stop rod 3b, which protrude out of the box body 3d, are inserted into the insertion holes 2a, or the first stop rod 3a, the second stop rod 3b And parts of the at least one gear shaft 3c, which protrude out of the box body 3d, are inserted into the insertion holes 2a. The method according to claim 1, the side of the slider (6) adjacent to the valve seat (7) is provided with a work boss (work boss) (6b) and a support boss (support boss) (6a), the work boss (6b) And both of the supporting bosses 6a are slide-fitted into the valve seat 7, and the slider 6 allows the working boss 6b to completely cover the first through hole 7a. Or, a part of the first through hole 7a and a part of the second through hole 7b at the same time, or the second through hole 7b completely, so as to be rotatable, an electric valve. 5. The support boss (6a) according to claim 4, wherein the support boss (6a) comprises strip-shaped (strip-shaped) bosses arranged symmetrically along the longitudinal direction of the slider (6), the working boss (6b) is a circular boss, the The radius of the circular boss is greater than the radius of the first through hole 7a and the second through hole 7b by 1.6 mm to 2 mm, the electric valve. The method according to claim 2, wherein the gear set (3f) includes a first gear (3x), a second gear (3z) ... Nth gear, and the first gear (3x) is the second gear (3z), ..., N-1 th gear is engaged with the N th gear, N ≥ 2, the electric valve. The method according to claim 1, wherein the electric valve further comprises a positioning shaft (5) fixedly connected to the valve body (4) and the valve seat (7), the slider (6) is the positioning An electric valve rotatably connected to the shaft (5). The compression ring (8) according to claim 1, wherein a compression ring (8) is disposed between the side wall of the valve seat (7) and the valve body (4), and the compression is far from the valve seat (7) and the slider (6). An electric valve, in which a damping piece (9) is arranged between the sides of the ring (8). The method according to claim 1, wherein a blind hole (6e) is provided on the side of the slider (6) far from the valve seat (7); The blind hole 6e is provided with an adjoining part 63, the adjoining part 63 having one end always adjoining the slider 6 and the other end adjoining the gear box 3, Electric valve. The method according to claim 2, wherein the side of the slider (6) far from the valve seat (7), and the output end (3e) of the gear box (3) are fitted to each other through a key and a key groove (key groove). Being, electric valve.

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