JP2002327855A - Electric selector valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric selector valve capable of complying with a refrigerator and the like for cooling down by providing an evaporator for a freezing room and a cold room respectively. SOLUTION: This electric selector valve is provided with a can 11, a stepping motor 12 consisting of a stator 13 attached to outer periphery of the can, a rotor 30 arranged at inner periphery of the can and the like, a valve element 40 provided on an inner peripheral side of the rotor so as to turn with the rotor and a valve drive body 32 integrally through them, and a valve seat member 20 arranged opposite on one end face side of the valve element. Two flow-out ports 22a and 22c are opened on a seat face 20a of the valve seat member, and a flow-in port 21 is opened on a side face of the valve seat member. A valve part for closing is provided at the valve element 40 so as to face the seat face 20a. The valve part for closing two flow-out ports 22a and 22c selectively in accordance with its rotation stop position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switching valve for switching a flow path, and more particularly, to an electric switching using a stepping motor suitable for being used in a refrigerant circulation system of a refrigerator, an air conditioner or the like. About the valve.

[0002]

2. Description of the Related Art Generally, a fluid flowing through a single flow path A is used for two times.
In the case of arbitrarily switching the flow to one of the flow path B and the flow path C, a three-way switching valve is usually interposed between the flow path A and the flow paths B and C.

Specifically, for example, in a refrigerator,
A three-way switching valve is provided between a flow path A through which the refrigerant from the compressor is introduced, a flow path B that guides the refrigerant to the evaporator in the freezer compartment, and a flow path C that guides the refrigerant to the evaporator in the refrigerator compartment. The three-way switching valve is provided so that the refrigerant introduced into the flow path A is selectively passed through only one of the flow path B and the flow path C. In this case, in the three-way switching valve, the flow path A (inlet)
Is always open, and when the flow path B (first outlet) is open, the flow path C (second outlet) is closed. Conversely, when the flow path B is closed, The channel C is configured to open.

[0004]

In recent years, for example, in a refrigerator, an inexpensive and high-performance refrigerator with a low energy loss, in which an evaporator is provided in each of a freezer compartment and a refrigerator compartment so that each compartment can be reliably cooled. The demand for is increasing. Accordingly, an object of the present invention is to provide a three-way valve or the like capable of responding to a refrigerator or the like that provides an evaporator in each of a freezing room and a refrigerator room as a switching valve that satisfies the above-mentioned requirements and ensures that each room is cooled. It is to provide a switching valve.

[0005]

In order to solve the above-mentioned problems, the present invention takes the following measures. 2. The motor-operated switching valve according to claim 1, wherein the stepper motor includes a can, a stator mounted on the outer periphery of the can, a rotor disposed on the inner periphery of the can, and the rotor on the inner peripheral side of the rotor. And a valve body disposed so as to be integrally rotatable via a valve driving body, and a valve seat member opposed to one end of the valve body. The member has a plurality of outlets opened on its seat surface, an inlet opened on a side surface of the valve seat member, and the valve body has a closing valve portion provided on a surface facing the seat surface. The closing valve portion selectively opens the plurality of outlets according to the rotation stop position.

According to a second aspect of the present invention, in the electric switching valve, all the outlets are opened by moving the valve body in the axial direction. 4. The electric switching valve according to claim 3, wherein the valve seat member includes a cam surface that moves the valve body in the axial direction by rotating the valve body, and a stopper that stops the rotation. And a valve cam body provided with a valve cam body.

According to a fourth aspect of the present invention, in any one of the above means, a portion other than the outer peripheral portion of the closing valve portion is depressed to form a depressed portion. An electric switching valve according to claim 5, wherein in any one of the above means,
The valve body is disposed with a play gap in the valve drive body, a support shaft for supporting the valve drive body is provided on a valve seat member, and a biasing member is provided in the play gap between the valve drive body and the valve body. And an interlocking member that transmits the rotation of the valve driver to the valve element is interposed between the valve driver and the valve element.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show an embodiment of an electric switching valve according to the present invention. The illustrated electric switching valve 10
Includes an inverted bottomed cylindrical can 11 and a stepping motor 12. Stepping motor 12
Is a stator 1 attached to the outer periphery of the can 11
3, a bobbin 14 disposed in the stator 13 and a winding (coil) 15 wound on the bobbin 14, and the outer circumferences of the stator 13, the bobbin 14 and the winding 15 are molded with a resin 16. ing. In addition, the can 11
A rotor 30 made of a plastic magnet that can be rotated in both forward and reverse directions is disposed on the inner periphery of the rotor 30.

As shown in FIG. 2, one end (lower end) of the can 11 has a large-diameter lower half 20B and a small-diameter upper half 20A.
And is hermetically joined to the intermediate step portion 20C of the valve seat member 20 made of stainless steel, brass, or the like through a ring-shaped member 31 by, for example, brazing or the like. As a result, a valve chamber 24 is formed.
In addition, the valve seat member 20 is provided with a lower portion of a metal support shaft 19 at the center of the seat surface (upper surface) 20a side by, for example, press-fitting, inserting, or the like. As shown in FIG. A first outlet 22a and a second outlet 22c are opened on the surface 20a. The support shaft 19
Is fixed to the valve seat member 20 as described above, while the upper portion of the support shaft 19 is supported by the top surface of the can 11 and the inner peripheral side wall via the collar 17.

The inlet 21 comprises a stepped vertical hole 21a formed in the valve seat member 20 in the vertical direction in the height direction, and a horizontal hole 21b extending laterally (right next to) from the vertical hole 21a. In the vertical hole 21a, a large-diameter portion located in the large-diameter lower half portion 20B of the valve seat member 20 includes:
The fluid introduction pipe 26 is directly fitted and joined by brazing, for example.

The first and second outlets 22a and 22c are
Each of the valve seat members 20 is formed so as to penetrate the valve seat member 20 in the height direction, and is formed with a stepped insertion hole including a large diameter portion, a middle diameter portion, and a small diameter portion in order from the lower side. In the large-diameter portion located in the large-diameter lower half portion 20B of 20,
The fluid outlet pipes 27a and 27c are directly fitted and joined by, for example, brazing.

The valve cam body 28 is, as shown in FIGS.
It is mounted and fixed on the outer periphery of the valve seat member 20. The valve cam body 28 regulates a rotation range of a valve body 40 described later,
This cam moves the valve body 40 up and down along the support shaft 19.
As shown in FIGS. 4 and 5, the details of the valve cam body 28 are a circle having a certain thickness having a length that rotates the valve seat member 20 by about 3/4 of a circle in plan view (however, 1/4 of the circle is missing). ing)
And is fixed to the outer peripheral portion of the valve seat member 20 by, for example, brazing. A stopper 28a formed of a rectangular rising piece, a high portion 28b adjacent to the stopper 28a, an inclined portion 28c adjacent to the high portion 28b, and an adjacent portion 28d. The lower surface has a uniform height,
In the state of being attached to the valve seat member 20, it is supported by the stepped portion.

Further, both end portions are expanded in a C shape so as to be easily mounted on the valve seat member 20. The stopper portion 28a has a function of regulating the rotation range of the valve body 40 described later, the high portion 28b has a function of moving the valve body 40 described later upward (FIG. 1), and the low portion 28d. Is a portion that slides a valve body 40 described later on the seat surface 20a of the valve seat member 20. Further, on the side surface of the valve cam body 28, a mounting hole 28f for the valve seat member 20 and an introduction hole 28e are formed. Valve cam body 28 The valve seat member 2 is adjusted so that the introduction hole 28e coincides with the lateral hole 21b of the valve seat member 20.
0 is attached. The above-mentioned can 11, stator 13, support shaft 19, valve seat member 20, valve chamber 24, fluid introduction pipe 2
6. Regarding the components of the fluid outlet pipes 27a and 27c and the valve cam body 28, there is no movement operation such as rotation with respect to the stepping motor 12.

On the other hand, as shown in FIG. 2, a metal ring-shaped connecting member 25 is fixedly mounted on the upper portion of the rotor 30 by insert molding. This ring-shaped connecting member 25
The upper part of a metal valve driver 32 composed of a cylindrical portion 32A and a large-diameter portion 32B extending downward from the cylindrical portion 32A is integrally connected by caulking. The valve driving body 32 is rotatably fitted to the upper portion of the support shaft 19 through an insertion hole formed vertically in the center thereof.
A mounting hole 33 having a constant depth is provided on the lower surface of the valve driver 32.
In the mounting hole 33, an interlocking rod 34 as an interlocking member is implanted in a fixed state protruding downward, and a lower portion of the interlocking rod 34 is connected to a valve body 40 described later. It will be detachably engaged with the notch 46. Therefore, the rotor 30 and the valve driver 32 are integrally rotated about the support shaft 19 in both forward and reverse directions. Also,
The valve driving body 32 rotates a valve body 40 described later via the interlocking rod 34.

The support shaft 19 between the valve seat member 20 and the valve driving body 32 is provided with a valve made of synthetic resin, for example, PTFE (tetrafluoroethylene) at a certain distance from the valve driving body 32. A shaft hole 42 in which the body 40 is drilled in the center
And is rotatably fitted through the outside. The valve body 40 has a columnar shape with a certain height, and a biasing member 45 such as a spring is interposed between the valve body 32 and the valve driving body 32, and is pressed against the seat surface 20a, that is, downward. The periphery of the shaft hole 42 on the upper surface of the valve body 40 is a receiving portion for the urging member 45. Although the outer peripheral surface of the valve body 40 is substantially cylindrical as a whole, a cam engaging portion 47 protruding outward at approximately 45 ° is formed in a part thereof, and the cam engaging portion 47 is provided with the stopper portion. 28a. In the vicinity of the cam engaging portion 47, a notch 4 for loosely fitting the lower portion of the interlocking rod 34 is provided.
6 are drilled.

The lower surface of the valve body 40, that is, the valve seat member 20
The basic shape of the contact surface with respect to the sheet surface (upper surface) 20a will be described with reference to FIGS. The notch 46 and the cam engaging portion 47 have already been described. The lower surface of the valve body 40 further includes a flat portion 41 and a closing height valve portion 43 formed downward. The closing valve portion 43 includes a valve body 4.
The portion excluding the peripheral portion 0, the peripheral portion of the shaft hole 42, and the peripheral portion of the notch 46 (these peripheral portions become the flat portion 41) becomes a plateau-like (but upside down) closing valve portion 43. ing.

The closing valve portion 43 is formed over about 300 ° of the lower surface of the valve body 40. It should be noted at this angle that the closing valve portion 43 does not open the two outlets at the same time, regardless of the position of the valve body 40 with respect to the valve seat member 20 at any angle. Therefore, it is necessary to design and change the size and shape of the closing valve portion 43 depending on the number and position of the outlets. In the case of this embodiment, since there are two outlets 22a and 22c,
By making these close to each other, the size of the closing valve portion 43 is not required as much as described above. However, in the case of this embodiment, an outflow port can be further provided to form a four-way valve. In any case, when it is required that the two outlets 22a and 22c be fully closed, the closing valve portion 43 has a size (angle of the angle) that simultaneously closes the two outlets 22a and 22c. ) (See FIGS. 6 to 13 and FIG. 24).

Another shape of the closing valve portion 43 is shown in FIG.
This will be described with reference to FIGS. The closing valve portion 43 in the case shown in FIGS.
4 (concave shape). Therefore,
The outlet 22 located in the depression 44 is provided with a closing valve 43
Since it does not communicate with the space outside (therefore, the flat portion 41), the refrigerant does not flow into the outlet 22, and as a result, the same effect as the basic shape of the closing valve portion 43 is obtained. Rather, in this embodiment, the biasing member 45 is actuated with the differential pressure of the fluid.
The pressing force exerted on the valve body 40 by the valve is concentrated on the periphery of the closing valve portion 43, so that the seat surface 20 a and the closing valve portion 43
Is improved, and an improvement in the on / off function of the valve element 40 can be expected.

The motor-operated switching valve 10 is used for various devices. In the case of a refrigerator as in the embodiment, an evaporator is provided in each of the freezer compartment and the refrigerator. One valve 10 is arranged. As shown in FIGS. 1 and 2, in the electric switching valve 10, the high-pressure refrigerant fills the valve chamber 24 in the can 11 from the fluid introduction pipe 26 through the inflow port 21 of the valve seat member 20. Therefore, depending on the position (angle) of the valve body 40 with respect to the seat surface 20a of the valve seat member 20, the fully opened, fully closed (FIG. 12), the first outlet 22a (FIG. 13 for the freezing compartment), the second outlet 22c (for refrigerators).

The operation of the electric switching valve 10 is controlled by control means (not shown) such as a microcomputer. As a result, if it becomes necessary to supply a refrigerant to a certain evaporator, for example, the electric switching valve 10
The stepping motor 12 is driven, the rotor 30 rotates, and the valve body 40 is rotated by a required angle via the valve driving body 32 to supply the necessary refrigerant to the evaporator. When the supply of the refrigerant to the evaporator in each chamber is unnecessary, the position (angle) of the valve body 40 is in the closed position.

When full opening is required, as shown in FIG. 12, the cam engaging portion 47 is connected to the high portion 28b of the valve cam body 28.
And the valve body 40 is lifted against the biasing member 45, and the seat surface 20a and the closing valve portion 43
And the first and second outlets 22a and 22c are all opened. Further, as described later, when this full opening is not necessary, the inclined portion 28c and the high portion 28b shown in FIG.
And the valve cam body 28 having the lower portion 28d and the stopper portion 28a may be formed. Also, the first and second outlets 2
When the mutual positions of 2a and 22c are close to each other, the length of the closing valve portion 43 can be shortened (see another example described later).

Another example of the valve cam body 58 is shown in FIGS. FIG. 14 shows another example of a valve cam body 58 in which a valve seat member 50 is provided.
15 is a perspective view from another viewpoint different from FIG. 14, FIG. 16 is a perspective view of another example of only the valve cam body 58, and FIG. It is a perspective view of the valve seat member 50 for applying another example of the body 58. Also in this alternative example, the can 11, the stepping motor 12,
Rotor 30, valve driver 32, interlocking member 34, valve 40,
The basic configuration of the shaft hole 42, the closing valve portion 43, the biasing member 45, and the like is the same as the embodiment shown in FIGS.

The valve seat member 50 has a small-diameter upper half 50A,
It consists of a large-diameter lower half 50B and an intermediate step 50C, and a seat surface 50a is formed on the upper surface of the small-diameter upper half 50A.
A shaft hole 4 into which a lower portion of a metal support shaft 19 (see FIG. 2) is inserted in a central portion of the valve seat member 50 on the seat surface 50a side.
2 are drilled. Then, as shown in FIG. 17, the first outlet 52a and the second outlet 52c are opened in the sheet surface 50a at positions substantially symmetric about the shaft hole 42. Therefore, when it is necessary to close both the first outlet 52a and the second outlet 52c, the closing valve portion 43 has a shape (angle) longer than the angle of “180 ° + outlet diameter”. (See FIG. 24). Conversely, the first outlet 52a and the second outlet 52a
When it is necessary to close both the outlets 52c, and when the closing valve portion 43 is to be shortened, the distance between the first outlet 52a and the second outlet 52c can be reduced. Good. Further, if the distance between the first outlet 52a and the second outlet 52c is reduced, the movement of the valve body 40 when opening and closing the valve can be reduced.

The inlet 51 has a stepped vertical hole (not shown) formed in the valve seat member 50 in the vertical direction in the height direction.
A horizontal hole 51b extends laterally (right beside) from the vertical hole. The first and second outlets 52a, 52c are formed to penetrate the valve seat member 50 in the height direction, respectively. In addition, 45 of the outer circumference of the small diameter upper half 50A
The portion of the degree is not a curved surface, and a planar supporting plane 53 is formed substantially symmetrically at two places (FIG. 1).
7). Further, an engaging hole 54 having a constant depth is formed in a circumferential curved surface equidistant from the support planes 53 and 53.

The valve cam body 58 is mounted and fixed to the outer periphery of the valve seat member 50 as shown in FIGS. The valve cam body 58 of this alternative example only regulates the rotation range of the valve body 40 (see FIG. 2). Therefore, there is no vertical movement of the valve body 40, and there is no need to provide the high portion 28b and the inclined portion 28c as in the above-described embodiment. As shown in FIG. 16, the valve cam body 58 has a circumferential curved surface including the engaging hole 54 of the valve seat member 50, and engaging flat plate portions 58 g, 58 g abutting on the two support flat surfaces 53, and a curved surface. The stopper 58a is provided upright.

The upper edges of the engagement flat plate portions 58g, 58g that abut against the peripheral curved surface and both support planes 53 constitute a lower portion 58d as a cam. Further, a protruding piece 58f protruding inward at a constant length is provided below the stopper portion 58a. The protruding length and the outer shape of the protruding piece 58f are set to be equal to or slightly smaller than the depth and the inner shape of the engaging hole 54, or formed so that the protruding piece 58f is pressed into the engaging hole 54. May be. Such a valve cam body 58 can be manufactured by various means, but can be rationally manufactured by continuously performing shaping and deformation by pressing.

As shown in FIGS. 14 and 15, the valve cam body 58
Is fitted to the small diameter upper half 50A of the valve seat member 50.
At this time, the projecting piece 58f is engaged with the engaging hole 54 to perform positioning. After the fitting, the valve cam body 58 is fixed to the outer peripheral portion of the valve seat member 50 by, for example, brazing.

According to this alternative example, there is an effect that manufacture of the valve cam body 58 and mounting on the outer peripheral portion of the valve seat member 50 are simplified.

FIGS. 18 to 23 show still another example. In this alternative example, the distance (position angle) between the first and second outlets 52a, 52c is the same as that of the embodiment, and the shape (size) of the closing valve portion 43 when full closing is not required. ), And the size of the closing valve portion 43 is 150
°. In addition, there is no fundamental difference between the embodiment shown in FIGS. 18 and 19 and the embodiment shown in FIGS. 20 to 23, and is only a difference between the embodiments shown in FIGS. With such a large size of the closing valve portion 43, as shown in FIGS.
Although a and 52c cannot be closed at the same time, it is possible to selectively close either one of the outlets.
The valve cam body 28 provided on the valve seat member 20
Is adapted to include a stopper portion 28a and a lower portion 28d, and it is desirable that the valve body 40 be allowed to rotate within a certain range as shown by an arrow α in FIG. Needless to say, the rotation control of the valve element 40 is performed by the stepping motor 12.

In this alternative example, the lower surface (FIG. 19) of the flat portion 41 on the bottom side of the valve element 40 is flush with the closing valve portion 43 at a position facing the closing valve portion 43 at the same height. A stabilizing projection 43a is provided. This is because the closing valve portion 43 is pressed against the seat surface 50a of the valve seat member 50, and the valve body 40 and the valve seat member 50 are biased excessively.
The purpose is to eliminate these effects on the valve body 40 and the valve seat member 50 by providing the stabilizing projection 43a.

FIG. 24 shows a more specific example of a three-way valve using a valve body 40 of the type shown in FIG. 9 and a valve cam body 58 of the type shown in FIG. In this example, the first outlet 52a and the second outlet 52c are 150
° and the two outlets 52a, 52c
Can be closed (fully closed) together (however, not fully open). In this embodiment, when the cam engaging portion 47 is in contact with the x end of the stopper 58a, the outlet 52a is open, the outlet 52c is closed, and the cam engaging portion 47 is connected to the stopper 58a. When in contact with the y end, the outlet 52a is designed to be closed and the outlet 52c is designed to be open.

FIG. 25 shows a modification of the embodiment shown in FIG. This example differs from the specific example shown in FIG. 24 in the shape of the opening valve body 43, and the valve body is provided at a substantially intermediate portion between the inner valve piece 43b and the outer valve piece 43c constituting the opening valve body 43. The point is that a bridge valve piece 43d is provided in the radial direction of 40. The width and height of the bridge valve piece 43d are
It is the same as the inner valve piece 43b and the outer valve piece 43c. With the above configuration, since the bridge valve piece 43d performs the reinforcing action of the entire opening valve body 43, the shape in the operating state is further stabilized, and the communication between the outlets 52a and 52c is more reliably prevented. As well as the outlet 52a,
Alternatively, the opening / closing action accompanying the switching to the outlet 52c becomes smoother and more reliable. The bridge valve piece 43d is
As shown in FIG. 25, basically, one line may be provided, but a plurality of lines may be provided.

FIG. 26 shows a further modification in addition to the modification of FIG. This example is different from the modification shown in FIG. 25 in that the stabilizing projection 43a is not provided and the opening valve body 4 is not provided.
Is large, for example, 270 degrees, and two bridge valve pieces 43d are provided. In addition,
The width and height of these bridge valve pieces 43d, 43d are:
The points which are the same as the inner valve piece 43b and the outer valve piece 43c are not different from the modification shown in FIG.

With the above configuration, in addition to the operation and effect of the example shown in FIG. 25, the opening valve body 43 is formed large without providing the stabilizing projection 43a, so that the posture and operation of the valve body 40 can be improved. Stability is improved. Also, the bridge valve piece 43
By providing the d and 43d, the load due to the differential pressure applied to the opening valve body 43 is dispersed, and the bridge valve pieces 43d and 43d are dispersed.
43d can be avoided, and communication between the outlets 52a, 52c can be more reliably prevented. As described above, in the above-described embodiment, a refrigerator is described in which an evaporator is provided in each of a freezing compartment and a refrigerator compartment.
It goes without saying that a freezing room and a vegetable room may be used.

[0035]

According to the present invention, the following effects can be obtained by the above configuration. That is, 1. According to the invention described in claim 1, a can, a stator,
A stepping motor composed of a rotor, etc., a valve body disposed rotatably on the inner peripheral side of the rotor via a rotor and a valve driver, and a valve seat member disposed opposite to one end side of the valve body Wherein the valve seat member comprises:
A plurality of outlets are opened on the seat surface, an inlet is opened on the side surface of the valve seat member, and the valve body is provided with a closing valve portion on a surface facing the seat surface, and the closing valve portion is A three-way valve that selectively opens a plurality of outlets according to the rotation stop position can be realized.

2. According to the second aspect of the present invention, in addition to the above effects, it is easy to move the valve body in the axial direction to open all the outlets, and for example, a switching valve for a refrigerant of a refrigerator. When applied as, the charging time of the refrigerant can be shortened. 3. According to the third aspect of the present invention, in addition to any of the above effects, the valve seat member has a cam surface for moving the valve body in the axial direction by rotating the valve body and a stopper portion for stopping the rotation. With a simple structure, the valve body can be moved three-dimensionally, fully opened,
Actions such as partial opening and full closing can be performed.

4. According to the fourth aspect of the present invention, in addition to any of the above effects, a portion other than the outer peripheral portion of the closing valve portion is depressed to be a depressed portion, so that the closing valve by the biasing member is provided. The pressing force to the portion is concentrated on the peripheral portion of the closing valve portion, thereby improving the sealing performance between the seat surface and the closing valve portion, and improving the on / off function. 5. According to the invention as set forth in claim 5, in addition to any of the above effects, the valve element is disposed via a play gap in the valve driver, and a support shaft for supporting the valve driver is provided in the seat member, Furthermore, an urging member is interposed in the play gap between the valve driver and the valve element, and an interlocking member that transmits the rotation of the valve driver to the valve element is interposed between the valve driver and the valve element. This makes it possible to smoothly rotate and vertically move the valve element.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an electric switching valve according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a main part of the electric switching valve.

FIG. 3 is a plan view of the valve seat member of FIG. 2;

FIG. 4 is a development view of the valve cam body of FIG. 2;

FIG. 5 is a plan view of the valve cam body.

FIG. 6 is a bottom view of the basic shape of the valve body of FIG. 2;

FIG. 7 is a sectional view taken along the line AA of FIG. 6;

FIG. 8 is a perspective view of a basic shape of the valve body shown in FIG. 6;

FIG. 9 is a bottom view of the valve body of FIG. 2;

FIG. 10 is a sectional view taken along line BB of FIG. 9;

FIG. 11 is a perspective view of the valve body of the embodiment.

FIG. 12 is an operation explanatory view of the valve body.

FIG. 13 is an explanatory diagram of the operation of the valve body.

FIG. 14 is a perspective view showing a state in which a valve cam body of another example of the embodiment is engaged with a valve seat member.

FIG. 15 is a perspective view from another viewpoint in another example of FIG. 14;

FIG. 16 is a perspective view of another example of the valve cam body.

FIG. 17 is a perspective view of a valve seat member to which another example of the valve cam body is applied.

FIG. 18 is a bottom view of another example of the valve body.

FIG. 19 is a perspective view of another example of the valve element.

FIG. 20 is a bottom view of still another example of the valve body.

FIG. 21 is a perspective view of still another example of the valve body.

FIG. 22 is a diagram illustrating the operation of still another example of the valve body.

FIG. 23 is a diagram illustrating the operation of still another example of the valve body.

FIG. 24 is an operation explanatory view of an example according to a specific embodiment of a valve body.

FIG. 25 is an operation explanatory view of a further example according to a specific embodiment of a valve body.

FIG. 26 is an operation explanatory view of a further example according to a specific embodiment of a valve body.

[Explanation of symbols]

10. Electric switching valve 11. Can 12.
Stepping motor 13. Stator 14. Bobbin 15.
Winding (coil) 16.Resin 17.Color 19.
Support shaft 20 ・ ・ Valve seat member 20A ・ ・ Small diameter upper half 20B
・ ・ Large diameter lower half 20C ・ ・ Intermediate step 20a ・ ・ Sheet surface (upper surface) 21 ・ ・ Inlet 21a ・ ・ Vertical hole 21b ・
-Side hole 22-Outlets 22a, 22c-First and second outlets 24-Valve chamber 25-Ring-shaped connecting member 26-Fluid introduction pipe 27, 27a-27c-Fluid discharge pipe 28- Valve cam body 28a ··· Stopper part 28b
..High section 28c..Incline section 28d..Low section 28e
..Introduction hole 28f..Mounting hole 30..Rotor 31 ..
・ Ring member 32 ・ ・ Valve driver 32A ・ ・ Cylinder 32B
・ ・ Large diameter part 33 ・ ・ Mounting hole 34 ・ ・ Interlocking member (interlocking rod) 40 ・ ・ Valve element 41 ・ ・ Flat part 42 ・
· Shaft hole 43 ··· Closing valve portion 43a ··· Stability projection 43b ··· Inner valve piece 43c ··· Outer valve piece 43d
..Bridge valve piece 44..Depressed part 45..Biasing member 46.
Notch 47 Cam engaging part 50 Valve seat member (another example) 50A Small upper half 50B Large lower half 50C Middle step 50a Seat surface (upper surface) 51 ··· Inflow port 51b ··· Side hole 52 ··· Outflow ports 52a and 52c ··· First and second outflow ports 53 ··· Support plane portion 54 ··· Engagement hole 58 ··· Valve cam body 58a ··· Stopper portion 58d ·・ Lower part 58f ・ ・ Protrusion 58g ・
・ Flat plate

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Hitoshi Umezawa 7-17-24 Todoroki, Setagaya-ku, Tokyo Inside Fuji Machine Co., Ltd. F-term (reference) 3H062 AA05 AA13 BB28 CC02 EE11 FF40 FF41 HH04 HH08 HH09

Claims (5)

[Claims] 1. A stepping motor comprising a can, a stator mounted on the outer periphery of the can, a rotor disposed on the inner periphery of the can, and a rotor and a valve driver on the inner periphery of the rotor. An electric switching valve comprising: a valve body disposed so as to be integrally rotatable via a valve body; and a valve seat member disposed opposite to one end of the valve body, wherein the valve seat member has a seat thereof. A plurality of outlets are opened on the surface, an inlet is opened on the side surface of the valve seat member, and the valve body is provided with a closing valve portion on a surface facing the seat surface. A motor-operated switching valve, wherein the valve portion selectively opens the plurality of outlets according to the rotation stop position. 2. When the valve body moves in the axial direction,
The electric switching valve according to claim 1, wherein all the outlets are opened. 3. The valve seat member is provided with a valve cam body having a cam surface for moving the valve body in the axial direction by rotating the valve body and a stopper for stopping the rotation. The motor-operated switching valve according to claim 1, wherein: 4. The electric switching valve according to claim 1, wherein a portion other than an outer peripheral portion of the closing valve portion is depressed to form a depressed portion. 5. The valve body is disposed with a play gap in the valve drive body, a support shaft for supporting the valve drive body is provided on a valve seat member, and the play between the valve drive body and the valve body is further reduced. 5. The valve as claimed in claim 1, wherein an urging member is interposed in the gap, and an interlocking member for transmitting rotation of the valve driver to the valve is interposed between the valve driver and the valve. An electric switching valve according to any of claims 1 to 3.