JP2003042327A - Electric flow control valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric flow control valve facilitated in fitting and positioning of a stator in relation to a can and improved in workability. SOLUTION: This electric flow control valve is provided with a valve body 22 having a valve element, the cylindrical can 15 fixed to the valve body and having a built-in rotor for opening and closing the valve element, a stator 20 provided outside of the can, and a presser lock tool 30 having a spring part 31 in a fitting base 25 provided in a lower surface of the stator. An outside surface of the spring part is provided with a lock projecting part 32, and the peripheral surface of the valve body is provided with a lock recessed part 22c to be engaged with the lock projecting part 32 and a lock means 22a for locking a tip of the spring part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric flow control valve for controlling the flow rate of a fluid such as a refrigerant.

[0002]

2. Description of the Related Art There are various conventional electric flow rate control valves of this type. For example, the one shown in FIG. 5 is known. In the electrically operated valve 1 of the illustrated example, basically, a ring-shaped stator 20 having an insertion hole in the center is inserted and fitted onto a can 15 having a bottomed cylindrical shape and made of, for example, stainless steel fixed to the valve body 12. The press locking device 30 is used to prevent rotation and removal. More specifically, for example, the valve body 12 made of stainless steel has a fluid inlet / outlet passage 12a,
12b is provided, and a valve seat (not shown) for connecting and disconnecting the needle valve (valve body) is arranged between the passages 12a and 12b inside. A rotor (not shown) having a permanent magnet is built in the can 15, and a stator coil 21 and a yoke 23 are housed above and below the stator 20. 21
Lead wire 26 and connector 27 attached to the tip thereof
And the connector 27 provided on the outer periphery of the stator 20.
The rotor is rotated by energizing and exciting it through the connector 24 to which is fitted and fixed, thereby opening and closing the needle valve and adjusting the flow rate of the fluid flowing between the fluid inlet / outlet passages 12a and 12b. ing. The valve body 12 and the can 15 are welded to each other.

In addition to the above structure, a space S is formed by the valve body 12 and the stator 20.
A mounting base 25 having a predetermined height is integrally formed and protruded on the lower surface of the stator 20 so as to be located at S. The upper surface of the mounting base 25 prevents the stator 20 from rotating with respect to the can 15 and is prevented from coming off. A substantially L-shaped press locking tool 30 made of sheet metal for stopping is fixed by screws 29.

The outer peripheral surface of the valve body 12 is provided with four engaging recesses 13 at predetermined angular intervals so as to be located on the same plane. These four engaging recesses 13
Is a relatively shallow spherical crown-shaped recess that fits into the locking projection 32 provided on the spring portion 31 of the pressing lock 30. As shown in FIG. 6, the pressure locking member 30 has a mounting plate portion 30 provided with a hole 30a through which the screw 29 is inserted.
b and a lateral side portion 30c connected to this, and is a press-formed product in which a relatively thin spherical crown-shaped locking convex portion 32 is projectingly provided substantially at the center of the outer side surface portion of the vertical side portion 30d of the spring portion 31. The vertical side portion 30d can elastically bend with the load fulcrum P located at the boundary (corner portion) with the horizontal side portion 30c as a base point.

In the motor-operated valve having such a structure, the can 15 and the valve body 12 are normally installed and fixed in advance in equipment such as an air conditioner as an expansion valve,
In addition, the assembling posture (position in the rotation direction) of the stator 20 with respect to the can 15 needs to be changed according to the direction in which the lead wire 26 is routed (depending on the model), and so on. The stator 20 is pushed downward from above with respect to the can 15, and is appropriately rotated to fit the locking convex portion 32 into any one of the four engaging concave portions 13.

[0006]

However, in the above-described conventional electric flow control valve, when the locking projection is fitted into the engagement recess, the stator is appropriately rotated while being pushed downward from above. However, there is a problem in that the work of aligning the two is troublesome and the workability is impaired in positioning and assembling the stator. Therefore, an object of the present invention is to provide an electric flow rate control valve that is easy to fit and has good workability.

[0007]

In order to achieve the above object, an electric flow control valve of the present invention comprises a valve body having a valve body and a rotor fixed to the valve body to open and close the valve body. A built-in cylindrical can, a stator provided outside the can, and a press lock having a spring portion on a mounting base provided on the lower surface of the stator,
A locking projection is provided on one outer surface of the spring portion, and a locking recess for fitting the locking projection to the outer peripheral surface of the valve body and a locking means for locking the tip of the spring portion. Is provided.

Further, the locking means is a step portion with which the tip portion abuts. Furthermore, the locking means is a ring-shaped member provided on the valve body. In the electrically operated valve according to the present invention having such a configuration, the distal end of the spring portion of the pressure locking member abuts on the locking means, whereby the stator can is automatically positioned in the axial direction. The locking protrusion can be fitted into the locking recess simply by rotating the stator with respect to the can.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an external view showing an embodiment of an electric flow control valve according to an embodiment of the present invention. 2 is a cross-sectional view of an essential part of FIG. 1, FIG. 3 is an external view illustrating another embodiment of an electric flow control valve according to the present invention, FIG. 4 is a cross-sectional view of an essential part of FIG. 3, and FIG. External view of partially broken flow control valve,
FIG. 6 is an explanatory view of the pressure locking tool shown in FIG. Figure 1
The electric flow rate control valve 10 of FIG. 3 and the electric flow rate control valve 1 of FIG. 3 are different only in the configuration in which the locking means is provided in the valve body, and the other configurations are the same. The same reference numerals are given to the portions to be described, and the description will be omitted. In the electric flow rate control valve 10 shown in FIG. 1, the mounting direction of the spring portion 31 of the press lock 30 is different from that of the conventional electric flow rate control valve 1 shown in FIG.

In the electric flow control valve 10 shown in FIG. 1, a step portion 22a is formed in the valve body 22 as shown in the sectional view of the main portion of FIG. The step portion 22a serves as a locking means for locking the tip end portion 31a of the spring portion 31 of the pressing locking tool 30. The step portion 22a serving as the locking means is formed at a position where the engagement protrusion 32 of the spring portion 31 fits into the engagement recess 22c formed on the outer peripheral surface of the valve body 22. Reference numeral 22b indicates a welded portion between the can 15 and the valve body 22. With this configuration, when the stator 20 is pushed downward from above, the tip end portion 31a of the spring portion 31 of the pressing and locking device 30 is brought into contact with and locked by the step portion 22a, thereby pushing the stator 20 more than necessary. Will be blocked. As a result, the engagement projection 32 and the engagement recess 22c can be easily fitted by rotating the stator 20 at the locking position of the spring tip 31a. Therefore, the fitting of the two becomes easier, and the workability in assembling the stator can be improved.

FIG. 3 is an external view showing another embodiment of the electric flow control valve according to the present invention. Instead of the step portion 22a formed in the valve body 22 in FIG. 1, the valve body 22 is shown.
A ring-shaped member 22d is press-fitted into the valve body 22 and is provided in the valve body 22. FIG. 4 is a cross-sectional view of essential parts showing a state where a ring-shaped member 22d made of, for example, stainless steel or brass is press-fitted into the valve body 22. The thickness and height of this ring-shaped member 22d are set to appropriate sizes.

According to this structure, the ring-shaped member 22d
The upper end surface 22e of the spring portion 31e is similar to the step portion 22a of FIG.
The distal end portion 31a of the ring-shaped member 22d is locked, and the ring-shaped member 22d serves as a locking means for locking the pressing locking tool 30.
As a result, excessive pushing of the stator 20 can be prevented by the locking means, and the tip portion 3 of the spring portion 31 can be prevented.
By rotating the stator 20 at the locking position of 1a, the engaging convex portion 32 and the engaging concave portion 22c can be easily fitted, and the workability at the time of assembling the stator can be improved. The ring-shaped member 22d is
The position of the upper end surface 22e is such that the engaging convex portion 32 and the engaging concave portion 22 are
It goes without saying that the valve body 22 is press-fitted and fixed so as to be in a position where c is fitted.

[0013]

As described above, in the electric flow control valve according to the present invention, the positioning of the stator with respect to the valve body can be easily performed, and therefore the workability when assembling the stator can be improved. .

[Brief description of drawings]

FIG. 1 is an external view illustrating an embodiment of an electric flow control valve according to an embodiment of the present invention.

FIG. 2 is a sectional view of a main part of FIG.

FIG. 3 is an external view illustrating another embodiment of the electric flow control valve according to the present invention.

FIG. 4 is a cross-sectional view of a main part of FIG.

FIG. 5 is a partially cutaway external view of a conventional electric flow control valve.

FIG. 6 is an explanatory view of the pressure locking tool shown in FIG.

[Explanation of symbols]

P ・ ・ Load fulcrum S ・ ・ Space 1 ・ ・ Electric flow control valve (conventional) 10 ・ ・ Electric flow control valve (present invention) 12 ・ ・ Valve body (conventional) 12a, 12b ・ ・ Fluid inlet / outlet passage 13 ... Engagement recessed part 15 · Can 20 · Stator 21 · Stator coil 22 · Valve body (present invention) 22a · Step part (locking means) 22b · · Welded part 22c · · Engagement recessed part 22d · · Ring -Shaped member (locking means) 22e..upper end surface 23..yoke 24..connector 2
5 ... Mounting base 26 ... Lead wire 27 ... Connector 2
9 ··· Screw 30 · · Press lock 30a · · Hole 3
0b ··· Mounting plate portion 30c · · Horizontal side portion 30d · · Vertical side portion 31 · · Spring portion 31a · · Tip portion 32 · · Locking convex portion

Claims (3)

[Claims] 1. A valve main body having a valve body, a cylindrical can that is fixed to the valve main body and has a rotor for opening and closing the valve body, and a stator provided outside the can.
The mounting base provided on the lower surface of the stator is provided with a pressure locking tool having a spring portion, a locking projection is provided on one outer surface of the spring portion, and the locking projection is provided on the outer peripheral surface of the valve body. An electric flow rate control valve, comprising: a locking recess that fits with a portion; and locking means that locks the tip of the spring portion. 2. The electric flow control valve according to claim 1, wherein the locking means is a step portion with which the tip portion abuts. 3. The electric flow control valve according to claim 1, wherein the locking means is a ring-shaped member provided on the valve body.