JPH10141536A - Motor-driven flow regulating valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor-driven flow regulating valve which is simply structured by reducing the number of component items and fixed connection parts so that it can be simply and easily assembled, and which is capable of reducing the manufacturing cost as much as possible and improving the assembly operation. SOLUTION: A connecting member 43 is connected and fixed to the inside peripheral side of a rotor 12, and the upper side-large diameter stepped part 52 of a valve element 50 is fitted into the connecting member 43 so that it can rotate integrally with the connecting member. A lower side-small diameter stepped part 51 of the valve element 50 is slidably dropped into a valve chest 17, and the upper side-larger diameter stepped part 52 of the valve element 50 is rotatably supported on a valve part 45.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor-operated flow control valve used in a refrigeration cycle such as an air conditioner or a refrigerator.

[0002]

2. Description of the Related Art As this type of motorized flow regulating valve, a valve as shown in FIG. 9 has been known in the past, which will be briefly described below. Electric flow regulating valve 1 shown in the figure
Is a stepping motor 2, a valve unit 3, a valve shaft 4, and a valve body 5.
The stepping motor 2 has a cylindrical can 7 connected to the valve portion 3 via a lid-shaped can receiving member 6, and a stator yoke 8 is integrally fitted on an outer peripheral portion of the can 7. Is equipped. A bobbin 9 is provided in the stator yoke 8, and a winding 10 energized from the outside is wound around the bobbin 9. The outer circumferences of the stator yoke 8, the bobbin 9 and the winding 10 are cast by a resin mold 11, and a rotor 12 fixed to a connecting sleeve 29 described later is arranged inside the can 7. I have. The rotor 12 is made of, for example, a material obtained by adding a magnetizable metal powder to a synthetic resin. The material is cast on the outer peripheral side of the connecting sleeve 29 to perform insert molding. It is magnetized (magnetized) in a predetermined manner (polar arrangement) by a porcelain machine.

A pressing stopper 14 is attached to the upper part of the resin mold 11 by a screw 13. A crown-shaped locking convex portion 15 formed on the pressing stopper 14 is attached to the outer periphery of the can 7. For example, the stator yoke 8, the bobbin 9, the winding 10, and the resin mold 1 are fitted by fitting into any one of four recesses 16 provided at 90-degree intervals.
1 is positioned and stopped.

The valve section 3 has a valve chamber 17, and a fluid inlet / outlet 19 is opened at one side of the valve chamber 17, and the fluid inlet / outlet 19 has a conduit 18 communicating with the valve chamber 17. Is connected. A fluid inlet / outlet 21 which is opened / closed by the valve body 5 is formed in a lower portion of the valve chamber 17, and a conduit 2 communicating with the valve chamber 17 through the fluid inlet / outlet 21.
0 is connected. Above the valve chamber 17, a guide bush 23 in which a female screw portion 22 is formed on an inner peripheral portion is fixedly fitted.

[0005] A male screw part 25 formed on the outer periphery of the holder 24 is screwed into the female screw part 22 of the guide bush 23, and a flange 33 is formed on a lower part of the inner circumference of the holder 24.
The attached valve element 5 is slidably fitted. A collar 26 for receiving the flange 33 of the valve element 5 is press-fitted and fixed below the holder 24, and the valve element 5 is constantly attached downward by a coil spring 27 compressed in the holder 24. It is being rushed.

A valve shaft 4 is fixedly fitted in the upper part of the holder 24 so as to be able to rotate integrally with the holder 24.
On the outer periphery of the upper part of the holder 24, a connecting sleeve 2 made of synthetic resin and having a convex movable side stopper 28 protruding downward.
9 are externally fitted and fixed so that they can rotate integrally.

The connecting sleeve 29 and the holder 24
Is fixed by insert molding.
The connection sleeve 29 is formed by casting the connection sleeve 29 on the outer periphery of the connection sleeve 29. The connection between the connection sleeve 29 and the rotor 12 disposed on the outer periphery of the connection sleeve 29 is also fixed by insert molding on the outer periphery of the connection sleeve 29. 12 between the holder 24 and the connecting sleeve 29 and between the connecting sleeve 29 and the rotor 12 are fitted into the concave and convex, respectively, so that the three members are integrally rotated, and It can be moved in one direction.

On the other hand, a coil spring 30 is mounted above the valve shaft 4. This coil spring 3
0 indicates that the rotor 12 rotates (reversely rotates) and the valve shaft 4 and the connecting sleeve 29 are raised by screwing the female screw portion 22 and the male screw portion 25 into a thread, and the screw portions 22, 25 are raised.
When the screw is released, the holder 24 is pressed toward the guide bush 23 to facilitate re-screw.

On the outer periphery of the upper part of the guide bush 23, a fixed receiving seat 32 made of a synthetic resin and having a convex fixed side stopper 31 to which the movable side stopper 28 abuts is formed by insert molding. And is fixed by external fitting.

In the motorized flow control valve 1 having such a configuration, when the winding 10 is energized in one direction, the rotor 12, the connecting sleeve 29, the valve shaft 4, the holder 24, etc. are integrally rotated (forward). The valve body 5 is lowered by screwing by screwing the female screw part 22 and the male screw part 25, and the fluid inlet / outlet 21 is closed by the valve body 5.

When the fluid inlet / outlet 21 is closed, the movable stopper 28 has not yet come into contact with the fixed stopper 31 and the holder 5 remains closed while the valve element 5 closes the fluid inlet / outlet 21. 24 and the like are further rotated down. The holder 24 with respect to the valve element 5 at this time
The amount of downward movement is absorbed by the compression of the coil spring 27, and when the holder 24 and the like are further rotated down, the movable-side stopper 28 abuts against the fixed-side stopper 31. Even if the current excitation is continued, the rotational lowering movement of the connecting sleeve 29, the valve shaft 4, the holder 24, etc. is forcibly stopped.

When the winding 10 is energized in the other direction, the rotor 12, the coupling sleeve 29, the valve shaft 4, the holder 24 and the like are integrally and reversely rotated. The valve body 5 is raised by screwing by screwing, and the fluid inlet / outlet 21 is opened by the valve body 5.

As described above, in the conventional electric flow regulating valve 1, the connecting sleeve 29, the valve shaft 4, the holder 24, etc. are driven to rotate by the stepping motor 2 composed of the stator 8 and the rotor 12 to be moved up and down by screw feed. The flow rate is adjusted by opening and closing the fluid inlet / outlet 21 (changing the opening area) with the valve element 5 which rises and falls accordingly. In this case, in order to convert the rotational movement of the connecting sleeve 29, the valve shaft 4, the holder 24, and the like into the elevating movement of the valve body 5, the fixed side (valve part 3 side) and the movable side (valve body 5 side).
Side), the female screw part 22 (guide bush 23)
The male screw part 25 (holder 24) is indispensable.

Therefore, the number of parts and the production cost of parts are disliked to be great, and the assemblability is not good. Further, depending on the pressure of the fluid in the conduits 18 and 20, the valve body is formed by the fluid pressure. 5 could be pushed upward, and the opening / closing accuracy of the valve body 5, in other words, the flow rate adjustment accuracy could not be said to be good.

In order to solve the above-mentioned problems of the conventional electric flow regulating valve, the applicant of the present application has made it possible to adjust the flow rate only by rotating the valve body, that is, without having to raise and lower the valve. The previously proposed motorized flow regulating valve was proposed (Japanese Patent Application No. 8-187911). One embodiment of this motorized flow control valve (hereinafter referred to as the prior application motorized flow control valve) will be briefly described below with reference to FIGS. 6 to 8.

In the motorized flow control valve 70 of the prior application shown in FIG. 6, parts corresponding to those of the conventional motorized flow control valve 1 shown in FIG. The description thereof will be simplified or omitted, and the differences will be mainly described below.

The illustrated electric flow regulating valve 70 has a valve portion 75 having a stepped cylindrical valve chamber 76. A fluid inlet / outlet 19 is opened at one side of the valve chamber 76, and the fluid inlet / outlet 19 is opened. The conduit 18 communicating with the valve chamber 76 is connected to the outlet 19. The other side of the valve chamber 76 has the fluid inlet / outlet 1
Fluid inlet / outlet 77 is opened so as to be located slightly above 9, and conduit 20 communicating with valve chamber 76 is connected to fluid inlet / outlet 77.

A can 7 in which a stator 8 and the like are fitted on the outer periphery of the can 7 is attached to the upper portion of the valve portion 75 via a flat can receiving member 6. The can receiving member 6 is provided with a fixed-side stopper 31 projecting upward by press molding or the like, against which a movable-side stopper 28 integrally formed with a rotor 72 described later comes into contact.

At the center of the top surface of the can 7 and at the center of the bottom of the valve chamber 76, there are provided recesses which are vertically recessed, and the valve shaft 4 is rotatably interposed between the recesses. A rotor 72 is connected and fixed to an intermediate portion of the valve shaft 4 opposite to the stator 8. The rotor 72 is manufactured by pouring a material in which a metal powder that can be magnetized into a synthetic resin is added and mixed into the outer peripheral side of the valve shaft 4 and performing insert molding.

A valve body 73 is connected and fixed below the valve shaft 4 so as to rotate integrally therewith. The valve body 73 rotates and slides in the valve chamber 76 to open and close the fluid inlet / outlet 19. The valve body 73 is shown in FIGS.
As shown in (d), the whole is formed into a cylindrical shape. For example, the upper surface a-b surface (rotation angle 0 ° -40 °) is a plane, and the b-c surface (rotation angle 40 ° -300 °). ) Is a helical shape, the c-a plane (rotation angle 300 ° -360 °) is cut out in a plane, and the step between the a-b plane and the c-a plane is the fluid inlet / outlet 1
The height of the caliber 9 is not less than h. The above rotation angle is an example and can be changed as appropriate.

In the motorized flow control valve 70 having such a configuration, when the winding 10 is energized in one direction, the rotor 72 and the valve shaft 4 rotate integrally (forward rotation), and the valve 73 also rotates in the direction in which the upper end portion cut out in a spiral shape reduces the opening area of the fluid inlet / outlet 19,
When a predetermined rotation angle, for example, 260 degrees or more is rotated from the fully opened state, as shown in FIG.
Is completely closed, the movable-side stopper 28 abuts against the fixed-side stopper 31, and the rotation of the winding 10 is forcibly stopped even when the energization and excitation of the winding 10 is continued. Also,
When the winding 10 is energized in the reverse direction, the valve
Rotates in the reverse direction, and the fluid inlet / outlet 19 is opened as shown in FIG.

As described above, the prior-art electric flow control valve 70
, The upper end portion of the valve body 73 facing the fluid inlet / outlet 19 is cut out in a spiral shape, and the fluid inlet / outlet 19 is opened and closed only by the rotation of the valve body 73. The threaded portion of the adjusting valve 1 is not required, so that the number of parts, the cost of manufacturing the parts, and the like are significantly reduced and the assemblability is improved as compared with the conventional one.

[0023]

However, in the electric flow regulating valve of the prior application, the part that rotates integrally is
In the case of three to four parts, that is, the one shown in FIG. 6 described above, the rotor 72, the valve shaft 4, and the valve body 73 are composed of a total of three parts. Although reduced, it is necessary to further reduce the number of parts.

The assemblability is improved by reducing the number of parts as compared with the conventional one. However, there are a couple of fixed parts between the parts, and the assemblability is further improved. Need to improve.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to reduce the number of parts and the number of connecting and fixing parts to form a simple structure, and to assemble easily and easily. An object of the present invention is to provide a motor-operated flow control valve capable of reducing manufacturing costs as much as possible and further improving assemblability.

[0026]

In order to achieve the above-mentioned object, an electric flow regulating valve according to the present invention basically comprises a can and a valve chamber having a fluid inlet / outlet opening. Side, a valve body having a portion facing the fluid inlet / outlet obliquely cut away, a rotor that rotates integrally with the valve body, and a stator attached to the outer periphery of the can. Rotation driving means.

A connecting member is connected and fixed to the inner peripheral side of the rotor, a part of the valve body is fitted to the connecting member so as to rotate integrally therewith, and the valve body is fitted to the valve chamber. The lower small-diameter portion is slidably dropped, and the upper large-diameter step portion of the valve body is rotatably supported by the valve portion.

In a preferred aspect of the electric flow regulating valve according to the present invention, a cross-sectional outer shape of a fitting portion of the valve body with the connection member is a non-circular shape such as a hexagon, and the fitting portion of the valve body is The connecting member is externally fitted so as to be vertically insertable and removable.

In this embodiment, when assembling it, first, the lower small diameter portion of the valve body is dropped into the valve chamber. Thus, the valve element has a lower small-diameter portion rotatable and removably inserted into and removed from the valve chamber, and an upper large-diameter stepped portion of the valve element extends outside the upper surface of the valve chamber in the valve section. It is rotatably supported on the periphery. Next, the connecting member is fitted to the upper portion of the valve body so as to be dropped from above. In this case, since the cross-sectional outer shape of the fitting portion of the valve body with the connection member is a non-circular shape such as a hexagon, the valve body and the connection member are connected to rotate integrally. However, since there is no restriction in the vertical direction, the connecting member can be freely inserted and removed in the vertical direction with respect to the valve element.

[0030] The connecting and fixing of the rotor and the connecting member is usually performed prior to the connecting and connecting of the connecting member to the valve body, and when the connecting and connecting of the connecting member to the valve body is completed. At the same time, the rotor is arranged at a predetermined position facing the stator.

By doing so, the valve shaft and the like that were required in the prior art and the prior application are not required, the configuration is simplified, the number of parts and the number of connection fixing points are reduced,
In addition, since the lower part of the valve body is dropped into the valve chamber and the connecting member with the rotor is dropped into the valve body and fitted together, the rotating part can be assembled.
The assembling work is simple and easy, the assemblability is greatly improved, and the production cost is greatly reduced.

In another preferred embodiment of the present invention, a large diameter step is provided at a portion of the valve body below the fitting portion with the connecting member, and a portion above the fitting portion is caulked. The valve body is fixed to the connecting member so as to rotate integrally with the connecting member so that the fitting portion is sandwiched between the large-diameter step portion and the caulking portion.

Also in this embodiment, the valve shaft and the like which were required in the conventional and prior applications are not required, the configuration is simplified, the number of parts and the number of connecting and fixing points are reduced, and
After dropping the lower small diameter portion of the valve body into the valve chamber, and then fitting the valve body so that the connecting member with the rotor is dropped, the portion above the fitting portion is swaged only by swaging. Is assembled, the assembling work is simple and easy, the assemblability is significantly improved, and the manufacturing cost is greatly reduced.

[0034] In another preferred embodiment of the present invention, a connecting member made of a synthetic resin material is cast-enclosed by insert molding and fixedly connected to an upper portion of the valve body. Also in this embodiment, the valve shaft and the like required in the prior art and the prior application are not required, the configuration is simplified, the number of parts and the number of connecting and fixing points are reduced, and the integrally connected valve is further reduced. Since the lower small diameter portion of the valve body of the rotating part consisting of the body, the connecting member, and the rotor only needs to be dropped into the valve chamber, the assembling work is simple and easy, and the assemblability is greatly improved. Cost is greatly reduced.

[0035]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a first embodiment of an electric flow regulating valve according to the present invention. The motorized flow control valve 40 of the present embodiment is configured by rotating parts (a rotor, a connecting member, a valve shaft, a valve body, and the like) of the prior application and the conventional motorized flow control valve 70, 1 shown in FIGS. Part)
Are different from each other, and the other parts have substantially the same configuration. Therefore, in the following, the parts corresponding to the parts having the same function in the prior application and the conventional electric flow regulating valve 70, 1 are denoted by the same reference numerals. The description thereof will be omitted, and the differences will be mainly described.

The motor-operated flow control valve 40 of the present embodiment basically has the can 7 and the cylindrical valve chamber 17 in which the fluid inlet / outlet 19 opens, similarly to the above-mentioned prior application. A valve part 45 attached to the lower side of the can 7, a stainless (SUS) valve element 50 in which a lower end portion 50 a facing the fluid inlet / outlet 19 is cut off in an oblique or spiral shape, and the valve element 50. And a stepping motor 2 having a stator 8 attached to the outer periphery of the can 7 and a rotor 12 rotating integrally with the can 7.

A connecting sleeve 43 comprising a cylindrical portion 43a and a flange 43b is fixedly connected to the inner peripheral side of the rotor 12. In other words, the rotor 1
2 is on the outer periphery of the cylindrical portion 43a of the connection sleeve 43,
The lower end is locked to the flange 43b and the upper end is externally fitted and fixed while being pressed and held by the pressing member 48.

The rotor 12 is, for example, formed by adding a magnetic powder of a metal to a synthetic resin and molding it into a cylindrical shape, and then magnetized (magnetized) in a predetermined mode (polar arrangement) by a magnetizer. It is said. In this case, the rotor 12
As a synthetic resin, for example, an appropriate material such as polyphenylene sulfide (PPS), nylon, polybutylene terephthalate (PBT), epoxy, phenol, polypropylene, polyethylene, or soft vinyl chloride is used. For example, an appropriate magnetic powder material such as ferrite (for example, barium ferrite, strontium ferrite, etc.), alnico, rare earth cobalt (for example, samarium cobalt, etc.) is used and molded.

The valve body 50 has a cylindrical lower small-diameter portion which is slidably inserted into the valve chamber 17 and has a lower end portion 50a facing the fluid inlet / outlet cut out in an oblique or spiral shape. 51 and an upper large-diameter step portion 52 having a hexagonal cross section
The upper portion of the upper large-diameter step portion 52 of the valve body 50 is fitted to the lower portion of the connection sleeve 43 so as to rotate integrally therewith (see FIG. 2). In other words, the lower end of the connection sleeve 43 is fitted to the upper part (fitting portion) of the upper large-diameter stepped portion 52 having a hexagonal cross section of the valve body 50 so as to be vertically insertable and removable.

The lower small-diameter portion 51 of the valve element 50 is slidably dropped into the valve chamber 17, and the upper large-diameter step 52 of the valve element 50 is connected to the valve chamber 45 in the valve section 45. 17 is rotatably supported on the outer peripheral edge 46a.

The valve body 50 is provided with a communication hole 54 penetrating in a vertical direction for communicating the valve chamber 17 with the inside of the can 7. The communication hole 54 allows the valve chamber 1
7 and the fluid pressure in the can 7 are equalized, and the fluid pressure is reduced to the valve body 5.
The opening and closing accuracy of 0 is not adversely affected.

A movable stopper 41 made of a metal pin is protruded downward from the lower surface of the connecting sleeve 43, and the movable stopper 41 is in contact with the upper surface 46 of the valve part 45. A fixed-side stopper 42 made of a metal pin that is in contact with is projected upward and protruded.

In the motorized flow regulating valve 40 having such a configuration, when the winding 10 is energized in one direction, the rotor 12, the connecting sleeve 43, and the valve body 50 integrally rotate (forward rotation), The lower end portion 50a of the valve body 50, which is cut off in an oblique or spiral shape, rotates in a direction to reduce the opening area of the fluid inlet / outlet 19, and when the valve 50 is rotated from a fully opened state by a predetermined rotation angle, for example, 260 degrees or more, the fluid inlet Exit 19
Is completely closed, and the movable side stopper 41 abuts against the fixed side stopper 42, so that the rotation of the winding 10 is forcibly stopped even when the energization of the winding 10 is continued. When the winding 10 is energized in the reverse direction, the valve body 50 rotates in the reverse direction and the fluid inlet / outlet 19 is opened.

As described above, in the electric flow control valve 40 of the present embodiment, similarly to the electric flow control valve 70 of the prior application, the lower end portion 50a facing the fluid inlet / outlet 19 of the valve body 50.
Are cut off in an oblique or spiral shape, and the fluid inlet / outlet 19 is opened and closed only by rotation of the valve body 50, so that substantially the same operation and effect as those of the prior application can be obtained. Thus, the following operational effects are obtained.

That is, in assembling the motorized flow control valve 40, first, the lower small diameter portion 51 of the valve body 50 is dropped into the valve chamber 17. As a result, the valve body 50 is configured such that the lower small-diameter portion 51 is rotatable and can be inserted into and removed from the valve chamber 17, and the upper large-diameter step portion 52 of the valve body 50 is The valve chamber 17 is rotatably supported on the outer peripheral edge of the upper surface.

Next, the connecting sleeve 43 is fitted to the upper portion of the upper large-diameter step portion 52 of the valve body 50 so as to be dropped from above. In this case, since the cross-sectional outer shape of the fitting portion of the valve body 50 with the connection sleeve 43 is hexagonal, the valve body 50 and the connection sleeve 43 are connected so as to rotate integrally. However, since there is no restriction in the vertical direction, the connecting sleeve 43 can be freely inserted and removed in the vertical direction with respect to the valve body 50.

The connection and fixing between the rotor 12 and the connection sleeve 43 are usually performed before the connection of the connection sleeve 43 to the valve body 50, and the connection of the connection sleeve 43 to the valve body 50 is performed. At the same time when the fitting connection is completed, the rotor 12 is arranged at a predetermined position facing the stator 8. Thereafter, the lower end of the can 7 is attached to the lid-shaped can receiving member 6 by welding or the like, and the stator 8 and the like are attached to the outer periphery of the can 7.

By doing so, the valve shaft (4) and the like, which were required in the prior art and the prior application, become unnecessary, and
The configuration is simplified, the number of parts and the number of connecting and fixing points are reduced, and the lower small diameter portion 51 of the valve body 50 is dropped into the valve chamber 17. Then, the connecting sleeve 43 with the rotor 12 is attached to the valve body 50. Since the rotating part can be assembled simply by fitting it in such a way that it is dropped, the assembling work is simple and easy, the assembling property is remarkably improved, and the production cost is greatly reduced.

FIG. 3 shows a second embodiment of the motorized flow regulating valve of the present invention. The illustrated electric flow regulating valve 40 ′ is provided with a valve body 5.
5 is a cylindrical lower small-diameter portion 56 slidably fitted in the valve chamber 17, and an intermediate large-diameter step portion rotatably supported on the outer peripheral edge 46 a of the upper surface of the valve chamber 17 of the valve portion 45. 58,
And a communication hole 5 having an upper small diameter portion 57 and penetrating vertically.
The connecting sleeve 4 is provided on the upper small diameter portion 57 of the valve body 55 except for the upper end thereof.
The lower part of 3 is fitted. In other words, an intermediate large-diameter stepped portion 58 is provided in a portion of the valve body 55 below the fitting portion with the connection sleeve 43, and a portion above the fitting portion is swaged to form a swaged portion 59. The valve body 55 is fixed to the connection sleeve 43 so as to rotate integrally therewith so as to sandwich the fitting portion between the intermediate large-diameter step portion 58 and the caulking portion 59.

The electric flow regulating valve 40 'of the second embodiment
However, the valve shaft (4) which was necessary in the conventional and prior applications
Is unnecessary, the configuration is simplified, the number of parts and the number of connecting and fixing portions are reduced, and the fitting portion is fitted to the valve body 55 by dropping the connecting sleeve 43 with the rotor. The rotating part can be assembled simply by caulking the upper part and the lower small diameter part 56 of the valve element 55 in this rotating part can be assembled simply by dropping it into the valve chamber 17. Is significantly improved, and the production cost is greatly reduced.
The lower end portion 55a of the valve body 55 which is cut off in an oblique or spiral shape changes the opening area of the fluid inlet / outlet 19.

FIG. 4 shows a third embodiment of the motorized flow regulating valve of the present invention. The illustrated electric flow regulating valve 40 ″ is provided with a valve body 6.
0, a cylindrical lower small-diameter portion 61 slidably fitted into the valve chamber 17, and an intermediate large-diameter stepped portion 63 rotatably supported on the outer peripheral edge of the upper surface of the valve chamber 17 of the valve portion 45. And an upper insert portion 62 having a T-shaped communication hole 54 for communicating the valve chamber 17 with the inside of the can 7. The upper insert portion 62 of the valve body 60 is used. A connection sleeve 29 made of a synthetic resin material is cast and encapsulated by insert molding and fixedly connected.

That is, here, the connecting sleeve 2
The connection and fixing of the valve body 9 and the valve body 60 is performed by casting the connection sleeve 29 on the outer peripheral side of the upper insert portion 62 of the valve body 60 by insert molding, and is disposed on the connection sleeve 29 and the outer periphery thereof. The rotor 12
The connection between the valve body 60 and the connection sleeve 29 and the connection between the connection sleeve 29 and the rotor 12 are also performed by casting the rotor 12 on the outer peripheral side of the connection sleeve 29 by insert molding. The three members are fitted to each other so that they can be rotated integrally. A movable stopper 44 projecting downward from the connecting sleeve 43 is integrally formed.

The motorized flow control valve 40 ″ of the third embodiment.
However, the valve shaft (4) which was necessary in the conventional and prior applications
And the like, the configuration is simplified, the number of parts and the number of connecting and fixing points are reduced, and the valve of the rotating part consisting of the valve body 60, the connecting sleeve 29, and the rotor 12, which are integrally connected. Since only the lower small diameter portion 61 of the body 60 needs to be dropped into the valve chamber 17, the assembling work is simple and easy, the assemblability is remarkably improved, and the production cost is greatly reduced.

In the above three embodiments, the rotor 12 and the connecting sleeves 43, 43, 2
9 is a separate body, but both of them may be integrally formed of a material in which a metal powder capable of being magnetized by a synthetic resin is added and mixed, and then only the rotor 12 may be magnetized. Good.

When the electric flow regulating valves 40, 40 ', 40 "of the respective embodiments are used in an air conditioner and are subjected to vibration, or when the electric flow regulating valves 40, 40' are used.
, 40 "may be required to restrict the position of the rotor 12, for example, when it is used in an inclined position. For example, when the necessity arises, the rotating part including the rotor 12 may be used. What is necessary is just to provide the urging means which constantly urges | biases toward the valve part 45 side.

FIG. 5 shows an example in which an urging means is provided in the electric flow rate adjusting valve 40 of the first embodiment. In the illustrated example of the electric flow control valve 40A, a coil spring 49 as an urging means is contracted between the top surface of the can 7 and the connection sleeve 43 via a spring receiver 49a. The spring receiver 49a has an upper surface projecting in a protruding shape at the center thereof and comes into contact with the flat top surface of the can 7 with a small contact area which is substantially in point contact. When the rotor 12 rotates, the coil spring 49a is rotated. Is rotatable following the rotor 12 so as not to twist and become a load.

The urging means is not limited to the one in the first embodiment, but can be similarly provided in the second and third embodiments. Needless to say, something other than a spring may be used.

[0058]

As will be understood from the above description, the motor-operated flow regulating valve of the present invention does not require a valve shaft or the like which was required in the prior art and the prior application, so that the configuration is simplified and the parts are simplified. The number of points and the connection and fixing points are greatly reduced, and furthermore, a very simple operation such as dropping the lower small diameter portion of the valve body into the valve chamber, and then fitting the valve body with the connecting member with the rotor dropped into the valve body. Since the rotating part is assembled by the work, the assembling work becomes simple and easy, and an excellent effect that the assemblability is remarkably improved and the production cost is greatly reduced is exhibited.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a first embodiment of an electric flow regulating valve according to the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a sectional view showing a second embodiment of the electric flow regulating valve according to the present invention.

FIG. 4 is a sectional view showing a third embodiment of the electric flow regulating valve according to the present invention.

FIG. 5 is a cross-sectional view showing an example in which an urging means is provided in the electric flow control valve of FIG. 1;

FIG. 6 is a cross-sectional view showing an example of a conventional (prior application) electric flow control valve.

FIG. 7 shows a valve body of the electric flow control valve shown in FIG. 6,
(A) is a perspective view, (b) is a plan view, (c) is a front view,
(D) is a development view.

FIG. 8 is a diagram which is used for describing the operation of the electric flow control valve shown in FIG.

FIG. 9 is a cross-sectional view showing another example of a conventional electric flow control valve.

[Explanation of symbols]

 2 Stepping motor 7 Can 8 Stator 12 Rotor 17 Valve chamber 19 Fluid inlet / outlet 40 Electric flow regulating valve 41 Movable stopper 42 Fixed stopper 43 Connection sleeve 50, 55, 60 Valve 51, 56, 61: Lower small diameter portion 52: Upper large diameter step portion

Claims (12)

[Claims] 1. A can, a valve part having a valve chamber in which a fluid inlet / outlet opens, and attached to a lower side of the can, and a valve body having a portion facing the fluid inlet / outlet obliquely cut away. An electric flow regulating valve comprising: a rotor that rotates integrally with the valve body; and a rotation drive unit that has a stator attached to the outer periphery of the can. A connecting member is connected and fixed to an inner peripheral side of the rotor. A part of the valve body is fitted to the connecting member so as to rotate integrally therewith, and a lower small-diameter portion of the valve body is slidably dropped into the valve chamber; An electric large-diameter stepped portion is rotatably supported by the valve portion. 2. A cross-sectional outer shape of a fitting portion of the valve body with the connecting member is non-circular, and the connecting member is externally fitted to the fitting portion of the valve body in a vertically removable manner. The electric flow regulating valve according to claim 1, wherein 3. The electric flow regulating valve according to claim 2, wherein a cross-sectional outer shape of a fitting portion of the valve body with the connecting member is hexagonal. 4. A large-diameter stepped portion is provided in a portion of the valve body below a fitting portion with the connecting member, and a portion above the fitting portion is caulked, and the large-diameter stepped portion is provided. The motor-operated flow control valve according to claim 1, wherein the valve body is fixed to the connecting member so as to rotate integrally therewith so that the fitting portion is sandwiched between the caulking portion. 5. The electric flow control valve according to claim 1, wherein a connection member made of a synthetic resin material is cast-inserted and fixedly connected to an upper portion of the valve body by insert molding. 6. The motorized flow regulating valve according to claim 1, wherein a communication hole for communicating the valve chamber with the inside of the can is formed in the valve body. 7. The electric flow control valve according to claim 1, wherein the rotor is formed of a material in which a metal powder that can be magnetized on a synthetic resin is added and mixed. 8. The rotor is made of any one of polyphenylene sulfide, nylon, polybutylene terephthalate, epoxy, phenol, polypropylene, polyethylene, and soft vinyl chloride as a synthetic resin, and is a magnetizable metal powder. As ferrite,
8. A compact formed by using any one of powder materials of alnico and rare earth cobalt.
3. The electric flow control valve according to claim 1. 9. A movable stopper is provided to project downward from a lower surface of the connecting member, and a fixed stopper is provided to project upward from the upper surface of the valve portion. The electric flow regulating valve according to any one of claims 1 to 8, wherein 10. A metal pin as a movable stopper is erected on a lower surface of the connecting member, and a metal pin as the fixed stopper is erected on an upper surface of the valve portion. The electric flow regulating valve according to claim 9, wherein 11. The electric flow control valve according to claim 9, wherein the connecting member and the movable-side stopper are integrally formed. 12. The method according to claim 1, wherein the rotor and the connecting member are integrally formed of a material in which a metal powder capable of being magnetized on a synthetic resin is added and mixed. The electric flow regulating valve as described in the above.