JP2018091378A - Motor valve and refrigeration cycle system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor valve capable of easily attaching a stator 11 to a valve body 20 and a can 30.SOLUTION: On a surface of a stator 11 on a valve body 20 side, provided is a wire spring 1 for fixation made of an elastic wire material. The wire spring 1 for fixation is fitted and fixed to a groove 111b of a stationary convex part 111 on a lower surface of the stator 11 and an arc groove 112a of a rectangular convex part 112. A can 30 is fitted into a columnar insertion hole 11H of the stator 11, and a horizontal crest part 1b of the wiring spring 1 for fixation is fitted into a concave part 30a of the can 30. The can 30 and a yoke 11c of the stator 11 are electrically grounded by the wire spring 1 for fixation. Also, the wire spring for fixation attached to the stator is engaged to a first joint pipe 21 of the valve body 20.SELECTED DRAWING: Figure 5

Description

  The present invention relates to an electric valve and a refrigeration cycle system used for a refrigeration cycle system such as an air conditioner.

  Conventionally, as this type of electric valve, there is a type in which a valve member is directly moved by rotation of a magnet rotor of a motor unit such as a stepping motor, and a valve port is opened and closed by this valve member. In such an electric valve, it is necessary to seal the fluid flow path, and the magnet rotor of the motor unit is accommodated in a cylindrical can having a sealing structure together with the valve body. And the stator of a motor part has a structure arrange | positioned on the outer periphery of a can. For example, JP-A-2011-208729 (Patent Document 1) and JP-A-2016-14453 (Patent Document 2) disclose similar motor-operated valves.

  In addition, the motorized valve in the air conditioner (air conditioner) is installed in the outdoor unit (outdoor unit). When installing, the valve device (valve body and can assembly) is first assembled in the refrigerant pipe, and the pipe is connected. After the parts are brazed and fixed, the stator is fitted into the can and fixed to perform electrical wiring and the like.

JP 2011-208729 A JP 2016-14453 A

  As described above, when the motor-operated valve is installed in the outdoor unit, it is necessary to attach the stator to the valve device in the outdoor unit. However, since the space inside the outdoor unit that is complicatedly piped is narrow, there is a problem that it is difficult to work. For this reason, a structure in which the stator can be easily assembled to the valve device is required.

  An object of the present invention is to provide a motor-operated valve in which a stator is easily assembled to the outer periphery of a can in a motor-operated valve in which a stator is attached to a valve device in which a can accommodating a magnet rotor is assembled to a valve body. To do.

  The motor-operated valve according to claim 1 is a valve device in which a cylindrical can containing a magnet rotor of the motor unit is assembled to a valve body incorporating a valve member that operates by driving the motor unit, and the motor unit. And a stator having a cylindrical fitting insertion hole centered on the axis, and the stator is mounted on the valve device by fitting the can into the fitting insertion hole of the stator. An elastic member that is partially engaged with the stator and held by the stator is provided, and the stator is fixed to the valve device by fixing means provided on the elastic member. .

  The motor-operated valve according to claim 2 is the motor-operated valve according to claim 1, wherein the elastic member is formed of a member surrounding the entire circumference or substantially the entire circumference of the fitting insertion hole of the stator. And

  The motor-operated valve according to claim 3 is the motor-operated valve according to claim 2, wherein the elastic member is made of a wire, and an arc groove concentric with the axis is formed around the fitting insertion hole in the stator. In addition, a part of the elastic member is inserted into the arc groove.

  The motor-operated valve according to claim 4 is the motor-operated valve according to any one of claims 1 to 3, wherein the fixing means of the elastic member protrudes toward the fitting insertion hole and protrudes toward the fitting device. It is characterized by being a horizontal chevron part which fits into.

  The motor-operated valve according to claim 5 is the motor-operated valve according to any one of claims 1 to 3, wherein the fixing means of the elastic member is provided on a locking convex portion provided on the valve device side. It is the clamp part engaged, It is characterized by the above-mentioned.

  The motor-operated valve according to claim 6 is the motor-operated valve according to claim 5, wherein the locking convex portion is a locking protrusion protruding horizontally on a side portion of the valve device, and the clamp portion is The locking projection is configured to engage with the locking projection in a direction rotating around the axis.

  The motor-operated valve according to claim 7 is the motor-operated valve according to claim 5, wherein the locking convex portion is a joint pipe projecting horizontally on a side portion of the valve device, and the clamp section is the joint pipe. In contrast, it is configured to move in the axial direction and engage with the joint pipe.

  The motor-operated valve according to claim 8 is the motor-operated valve according to claim 5, wherein the locking convex portion is a joint pipe projecting horizontally on a side portion of the valve device, and the clamp section is the joint pipe. In contrast, it is configured to be engaged with the joint pipe in a direction rotating around the axis.

  The motor-operated valve according to claim 9 is the motor-operated valve according to any one of claims 1 to 8, wherein the valve device and the stator yoke are electrically grounded by the elastic member. It is characterized by that.

  The refrigeration cycle system of claim 10 is a refrigeration cycle system including a compressor, a condenser, an expansion valve, and an evaporator, wherein the motor operated valve according to any one of claims 1 to 9. It is used as the expansion valve.

  According to the electric valve of the first to ninth aspects, the stator is provided with the elastic member, and the stator is fixed to the valve device by the fixing means of the elastic member, so that the stator can be easily assembled to the outer periphery of the can.

  According to the electric valve of the second aspect, since the elastic member is composed of a member surrounding the entire or substantially entire circumference of the insertion hole, the position of the fixing means provided on the elastic member is selected around the insertion hole. Since it can, design freedom increases.

  According to the motor-driven valve of the third aspect, since the elastic member made of the wire is inserted into the arc groove around the fitting insertion hole, a part of the elastic member slides in the arc groove when the elastic member is elastically deformed. It becomes movable and can easily be elastically deformed.

  According to the motor-operated valve of claim 4, the stator can be fixed to the valve device only by fitting the horizontal chevron provided on the elastic member so as to protrude toward the fitting hole side, so that the outer periphery of the can The stator can be easily assembled to the valve device, and positioning around the axis of the stator with respect to the valve device can be performed.

  According to the electric valve of the fifth aspect, the stator can be fixed to the valve device only by engaging the clamp portion provided on the elastic member with the locking convex portion provided on the valve device side.

  According to the motor-operated valve of claim 6, the stator is simply engaged by rotating the clamp provided on the elastic member to the locking projection provided on the valve device side so as to rotate about the axis. It can be fixed to the valve device and can be positioned around the stator axis. .

  According to the electrically operated valve of claim 7 or claim 8, in addition to the effect of claim 5, the stator can be fixed to the valve device using the joint pipe of the valve device, so that the manufacture is facilitated.

  According to the motor-driven valve of the ninth aspect, in addition to the effects of the first to eighth aspects, electrical noise between the stator yoke and the valve device can be prevented.

  According to the refrigeration cycle system of claim 10, the same effects as those of claims 1 to 9 can be obtained.

It is a side view of the motor operated valve of a 1st embodiment of the present invention. It is an AA arrow line view of FIG. 1 which shows the bottom face of the stator in 1st Embodiment. It is a BB arrow line view of Drawing 1 showing the bottom section of the stator in a 1st embodiment. It is the bottom view and side view of the wire spring for fixation in 1st Embodiment. It is a longitudinal cross-sectional view of the motor operated valve of 1st Embodiment. It is a longitudinal cross-sectional view of the motor operated valve of 2nd Embodiment of this invention. It is a side view of the motor operated valve of 3rd Embodiment of this invention. It is an AA arrow line view of Drawing 7 showing the upper surface of the stator in a 3rd embodiment. It is a BB arrow line view of Drawing 7 showing the upper section of the stator in a 3rd embodiment. It is the bottom view and side view of a wire spring for fixation in a 3rd embodiment. It is a side view of the motor operated valve of 4th Embodiment of this invention. It is a longitudinal cross-sectional view of the motor operated valve of 4th Embodiment. It is a side view of the motor operated valve of 5th Embodiment of this invention. It is a front view of the motor operated valve of 5th Embodiment. It is an AA arrow line view of FIG. 13 which shows the upper surface of the stator in 5th Embodiment. It is the bottom view and side view of the wire spring for fixation in 5th Embodiment. It is a side view of the motor operated valve of 6th Embodiment of this invention. It is a front view of the motor operated valve of 6th Embodiment. It is an AA arrow line view of FIG. 17 which shows the upper surface of the stator in 6th Embodiment. It is the bottom view and side view of the wire spring for fixation in 6th Embodiment. It is a figure showing the refrigerating cycle system of an embodiment.

  Next, an embodiment of the motor-operated valve of the present invention will be described with reference to the drawings. 1 is a side view of the motor-operated valve according to the first embodiment, FIG. 2 is a view taken along the line A-A in FIG. 1 showing the bottom surface of the stator in the first embodiment, and FIG. 3 is a bottom cross-sectional view of the stator in FIG. FIG. 4 is a bottom view and a side view of the fixing wire spring in the first embodiment, and FIG. 5 is a longitudinal sectional view of the motor-operated valve in the first embodiment. Note that the concept of “upper and lower” in the following description corresponds to the upper and lower in the drawings of FIGS. 1, 2, and 5.

  As shown in FIG. 5, this motor-operated valve includes a fixed wire spring 1 as an “elastic member”, a stepping motor 10 as a “motor unit”, a valve body 20, and a cylindrical can 30 made of a nonmagnetic material. And. The stepping motor 10 includes a stator 11 (described later) attached to the outer periphery of the can 30 and a magnet rotor 12 that is rotatably disposed inside the can 30. The magnet rotor 12 includes a magnetized member 121 on the outer periphery and a female screw member 122 in the center. The magnet rotor 12 can be rotated coaxially with the axis L of the cylindrical can 30.

  The valve body 20 is formed of a stainless steel or the like in a substantially cylindrical shape, and has a valve chamber 20A inside thereof. A first joint pipe 21 connected to the valve chamber 20A is connected to one side of the outer periphery of the valve body 20, and a second joint pipe 22 is connected to a cylindrical portion extending downward from the lower end. A valve seat member 23 is fitted to the valve chamber 20A side of the second joint pipe 22. The valve seat member 23 is formed with a valve port 23a communicating with the valve chamber 20A on the inner side. Via the valve port 23a, the valve chamber 20A and the second joint pipe 22 can be connected. The first joint pipe 21 and the second joint pipe 22 are fixed to the valve body 20 by brazing or the like.

  A can 30 is hermetically assembled to the upper end of the valve body 20 by welding or the like via a flat plate-shaped fixing member 24, whereby the valve body 20, the can 30 and the fixing member 24 constitute a “valve device”. ing. In the can 30, a holder 41 and a male screw member 42 fixed to the holder 41 are attached to the valve body 20 on the side opposite to the valve port 23 a. The male screw member 42 has a male screw portion 42a on the outer periphery. Guide holes 411 and 421 are formed at the center of the holder 41 and the male screw member 42, and the rod portion 43 a of the valve member 43 is inserted into the guide holes 411 and 421. The valve member 43 is made of stainless steel or the like, and has a cylindrical valve body 43b at the lower end inserted into the valve chamber 20A. The valve member 43 is guided by the guide holes 411 and 421 and is slidable in the direction of the axis L. A spring receiver 44a that receives the coil spring 44 is attached to the uppermost portion of the rod portion 43a.

  The female screw member 122 of the magnet rotor 12 is screwed to the male screw portion 42a of the male screw member 42 at the female screw portion 122a. A coil spring 44 is mounted between the magnet rotor 12 and the spring receiver 44a. The coil spring 44 constantly biases the spring receiver 44a and the valve member 43 toward the valve port 23a. . Thereby, the magnet rotor 12 is rotatably provided in the can 30. A predetermined gap is provided between the outer peripheral surface of the magnetized member 121 of the magnet rotor 12 and the inner peripheral surface of the can 30.

  A rotation stopper mechanism 50 including a spiral guide wire 51 and a movable stopper member 52 is provided on the ceiling of the can 30. In this stopper mechanism 50, the protrusion 12 a kicks around the movable stopper member 52 with the rotation of the magnet rotor 12, so that the movable stopper member 52 moves up and down while turning by screwing with the spiral guide wire body 51. The movable stopper member 52 abuts on the lower end stopper 51 a of the spiral guide wire body 51, thereby obtaining a rotation stopper action at the lowermost positions of the magnet rotor 12 and the valve member 43. Further, when the movable stopper member 52 abuts on the upper end stopper 51 b of the spiral guide wire body 51, a rotation stopper action at the uppermost end positions of the magnet rotor 12 and the valve member 43 is obtained.

  The stator 11 is configured by laminating a pair of coil portions 11A and 11B in the direction of the axis L. In each of the coil portions 11A and 11B, a coil 11b is wound around a resin bobbin 11a, and a magnetic pole is formed on the outer periphery of the bobbin 11a. A yoke (cylinder) 11c having teeth 11c1 is fitted. The yoke 11c is made of a magnetic material. And the upper and lower sides and outer periphery of the yoke 11c are coat | covered with the mold resin 110 by molding.

  The stator 11 has a cylindrical insertion hole 11H centered on the axis L at the center, and no mold resin 110 is formed on the inner periphery of the insertion hole 11H. The magnetic pole teeth 11c1 of the yoke 11c are arranged. The magnetic pole teeth 11 c 1 are in close contact with the outer peripheral surface of the can 30.

  With the above configuration, in the stepping motor 10, the coil 11b generates lines of magnetic force when a pulse output is applied to the coil 11b. As a result, in the coil portions 11A and 11B, the magnetic poles (N and S poles) are alternately changed in the magnetic pole teeth 11c1, and a magnetic attractive force and a magnetic repulsive force are generated on the magnetized member 121 of the magnet rotor 12, thereby generating a magnet. The rotor 12 rotates. When the magnet rotor 12 rotates, the magnet rotor 12 and the valve member 43 are moved up and down in the direction of the axis L by the screw feed mechanism of the female screw portion 122a of the magnet rotor 12 and the male screw portion 42a of the male screw member 42, and the valve element 43b is The seat member 23 is separated from / seated. Thereby, the opening area of the valve port 23a is increased / decreased, and the flow rate of the refrigerant flowing from the first joint pipe 11 to the second joint pipe 12 or from the second joint pipe 12 to the first joint pipe 11 is controlled.

  On the bottom surface of the stator 11 on the valve body 20 side, 4 is curved concentrically with one fixed convex portion 111, the axis L and the insertion hole 11H on the same circumference at a predetermined distance from the insertion hole 11H. A plurality of rectangular protrusions 112 are formed. The fixed convex portion 111 and the rectangular convex portion 112 are formed as a part of the mold resin 110 by molding. The fixed convex portion 111 has a trapezoidal portion 111a that protrudes toward the insertion insertion hole 11H (inside), and has grooves 111b on both sides of the trapezoidal portion 11a. Moreover, the rectangular convex part 112 has the circular arc groove 112a opened to the fitting insertion hole 11H side (inner side). The arc groove 112 is on the circumference concentric with the axis L and the insertion hole 11H. The fixing wire spring 1 is attached to the lower surface of the stator 11 by fitting the fixing wire spring 1 into the groove 111b of the fixing protrusion 111 and the arc groove 112a of the rectangular protrusion 112.

  The fixing wire spring 1 is formed of an elastic wire material such as stainless steel, and the fixing wire spring 1 has a substantially arc shape that surrounds substantially the entire circumference of the fitting insertion hole 11H of the stator 11. Both ends of the fixing wire spring 1 have bent portions 1a and 1a bent outward in the radial direction, and one horizontal as a “fixing means” located at the center of the bent portions 1a and 1a at an equal distance. It has a chevron 1b. The fixing wire spring 1 has two inclined chevron portions 1c and 1c between the horizontal chevron portion 1b and one bent portion 1a and between the horizontal chevron portion 1b and the other bent portion 1a. Yes. The horizontal chevron 1b is formed so as to protrude inside the fixing wire spring 1 in a plane perpendicular to the axis L. The inclined chevron portions 1c and 1c are formed so as to protrude inward of the fixing wire spring 1 and to incline with respect to the axis L side and protrude toward the stator 11 side. Moreover, the part between the bending part 1a and the inclined mountain-shaped part 1c, and the part between the horizontal mountain-shaped part 1b and the inclined mountain-shaped part 1c are each circular-arc-shaped connection parts 1d.

  In the fixing wire spring 1, the horizontal chevron 1b is fitted to the trapezoidal part 111a of the fixed convex part 111, and the inclined chevron parts 1c and 1c are arranged between the fixed convex part 111 and the rectangular convex part 112. . Further, the bent portions 1 a and 1 a are engaged with the end surfaces of the rectangular convex portions 112 and 112 far from the fixed convex portion 111. The fixing wire spring 1 is attached to the stator 11 by fitting the connecting portions 1d into the circular arc grooves 112a of the rectangular convex portions 112 and inserting them. With the structure as described above, the wire spring 1 for fixing is particularly slidable in the groove direction within the arc groove 112a in the connecting portion 1d. Further, the fixing wire spring 1 is fitted into the circular arc groove 112 a of the rectangular convex portion 112, whereby the position in the axis L direction with respect to the stator 11 is fixed.

  Further, as shown in FIGS. 1 and 2, the protruding end of the inclined chevron 1c of the fixing wire spring 1 is in pressure contact with the yoke 11c of the stator 11 around the fitting insertion hole 11H, thereby the yoke 11c. The fixing wire spring 1 is electrically grounded.

  The stator 11 to which the fixing wire spring 1 is attached has a can 30 fitted in the fitting insertion hole 11H, and is attached to the can 30 at the upper part of the valve body 20. At this time, the protruding end of the horizontal chevron 1b of the fixing wire spring 1 is fitted into a recess 30a (see FIG. 5) formed on the outer periphery of the lower portion of the can 30, and the fixing wire spring 1 (especially the horizontal chevron 1c). The fixing wire spring 1 and the stator 11 are fixed to the can 30 by the elastic force. Further, the fixing wire spring 1 and the can 30 are electrically grounded to the recess 30a and the horizontal chevron 1c. Thereby, the electrical noise between the yoke 11c and the can 30 can be prevented. Further, when the fixing wire spring 1 moves in the direction of the axis L in the direction of the axis L at the time of mounting, the horizontal chevron 1b is elastically deformed so as to open against the elastic force. This first embodiment In (and a second embodiment to be described later), the connecting portion 1d is slidable in the groove direction within the arc groove 112a of the rectangular convex portion 112, so that the elastic deformation of the horizontal chevron portion 1b is facilitated.

  FIG. 6 is a longitudinal sectional view of the electric valve according to the second embodiment. Hereinafter, in the second embodiment to the sixth embodiment, the same elements as those in the first embodiment are denoted by the same reference numerals as those in FIGS.

  In the first embodiment, the can 30 is attached to the valve body 20 via a flat plate-shaped fixing member 24. Moreover, the diameter of the can 30 of the first embodiment is larger than the inner diameter of the insertion hole 11H at the portion where the recess 30a is formed. This is to prevent interference when the magnet rotor 12 is inserted by the amount of the recess 30a protruding to the inside of the can 30. Only the portion where the recess 30a of the can 30 is formed may be pushed outward so as not to interfere when the magnet rotor 12 is inserted, so that the entire circumference of the can 30 may not be expanded.

  On the other hand, in this 2nd Embodiment, the straight can 40 whose length is shorter than the can 30 and the edge part by the side of the valve main body 20 matches with the internal diameter of the fitting insertion hole 11H is used. Further, the can 40 is airtightly assembled to the valve body 20 by welding or the like via a dish-shaped fixing member 25. Thereby, the valve body 20, the can 40 and the fixing member 25 constitute a “valve device”. A recess 25a is formed on the outer periphery of the fixing member 25, and the protruding end of the horizontal chevron 1b of the fixing wire spring 1 is fitted into the recess 25a, and the fixing wire spring 1 (particularly the horizontal chevron 1c) is fitted. The fixing wire spring 1 and the stator 11 are fixed to the fixing member 25 and the can 40 by the elastic force. Other configurations and operational effects are the same as those of the first embodiment.

  7 is a side view of the motor-operated valve according to the third embodiment, FIG. 8 is a view taken along arrow AA in FIG. 7 showing the top surface of the stator in the third embodiment, and FIG. 9 is an upper cross-sectional view of the stator in FIG. FIG. 10 is a bottom view and a side view of the fixing wire spring in the third embodiment.

  As shown in FIG. 7, the motor-operated valve includes a fixing wire spring 3 as an “elastic member”, a stepping motor 10, a valve main body 20, and a can 40 made of a nonmagnetic material as described above. The stepping motor 10 includes a stator 11 ′ attached to the outer periphery of the can 40 and a magnet rotor (not shown) that is rotatably disposed inside the can 40. In the third embodiment, as in the second embodiment, the valve body 20, the can 40, and the fixing member 25 constitute a “valve device”, and other structures such as a magnet rotor in the can 40 are the same. This is the same as in the second embodiment.

  On the upper surface of the stator 11 'opposite to the valve body 20, on the same circumference at a predetermined distance from the insertion hole 11H, one fixed convex portion 111, the axis L and the insertion hole 11H are concentric. Four curved rectangular protrusions 112 are formed. The fixed convex portion 111 and the rectangular convex portion 112 have the same shape as that of the first embodiment except that they are formed on the upper surface of the stator 11 ′, and the same reference numerals as those of the first embodiment are added. That is, the fixed convex portion 111 has a trapezoidal portion 111a and a groove 111b, and the rectangular convex portion 112 has an arc groove 112a. The arc groove 112 is on the circumference concentric with the axis L and the insertion hole 11H, and is open to the insertion hole 11H side. Further, two fixing holes 113 are formed on the upper surface portion of the stator 11 ′ of the third embodiment at a position facing the fixed convex portion 111 across the axis L.

  The fixing wire spring 3 is formed of an elastic wire such as stainless steel, and the fixing wire spring 3 has a substantially arc shape that surrounds substantially the entire circumference of the fitting insertion hole 11H. Both ends of the fixing wire spring 3 have bent portions 3a and 3a bent in the direction of the axis L, and one horizontal angle portion 3b as "fixing means" at a position facing the bent portions 3a and 3a. have. The fixing wire spring 3 includes two inclined chevron portions 3c and 3c between the horizontal chevron portion 3b and one bent portion 3a, and between the horizontal chevron portion 3b and the other bent portion 3a. Yes. The horizontal chevron 3b is formed so as to protrude inside the fixing wire spring 3 in a plane perpendicular to the axis L. The inclined chevron portions 3c, 3c are formed so as to protrude inward of the fixing wire spring 3, and to be inclined with respect to the axis L side and protrude toward the stator 11 'side. Moreover, the part between the bending part 3a and the inclination angle part 3c, and the part between the horizontal angle part 3b and the inclination angle part 3c become the connection part 3d, respectively.

  In the fixing wire spring 3, the horizontal chevron portion 3 b is fitted into the trapezoidal portion 111 a of the fixed convex portion 111, and the inclined chevron portions 3 c and 3 c are disposed between the fixed convex portion 111 and the rectangular convex portion 112. . Further, the bent portions 3a, 3a are inserted into the fixing holes 113, 113 and engaged therewith. Then, the fixing wire spring 3 is attached to the stator 11 ′ by fitting and inserting the connecting portions 3 d into the circular arc grooves 112 a of the rectangular convex portions 112. The fixing wire spring 3 is fitted in the circular arc groove 112a of the rectangular convex portion 112, whereby the position in the axis L direction with respect to the stator 11 'is fixed.

  Further, as shown in FIGS. 7 and 8, the protruding end of the inclined chevron 3c of the fixing wire spring 3 is in pressure contact with the yoke 11c of the stator 11 'around the fitting insertion hole 11H. 11c and the fixing wire spring 3 are electrically grounded.

  When the stator 11 ′ to which the fixing wire spring 3 is attached is attached to the can 40 at the upper part of the valve body 20, as shown by a one-dot chain line in FIG. The fixing wire spring 3 and the stator 11 ′ are fixed to the can 40 by the elastic force of the fixing wire spring 3. Further, the fixing wire spring 3 and the can 40 are electrically grounded at the concave portion 40b and the horizontal chevron portion 3c. Thereby, the electrical noise between the yoke 11c and the can 40 can be prevented.

  FIG. 11 is a side view of the motor operated valve of the fourth embodiment, and FIG. 12 is a longitudinal sectional view of the motor operated valve of the fourth embodiment.

  This electric valve includes a fixing wire spring 4 as an “elastic member”, a stepping motor 10 as a “motor part”, a valve main body 20 ′, and a can 30 made of a nonmagnetic material. As in the first embodiment, the stepping motor 10 is composed of a stator 11 and a magnet rotor (not shown). Further, similarly to the first embodiment, the valve main body 20 ′, the can 30 and the fixing member 24 constitute a “valve device”. A locking projection 26 as a “locking projection” is provided at one location on the outer periphery of the fixing member 24. The locking protrusion 26 may be a separate member from the fixing member 24 and may be joined to the fixing member 24 by welding or the like.

  A plurality of convex portions 114 are formed around the can 30 on the lower surface of the stator 11 on the valve body 20 side, and the fixing wire spring 4 is attached to the convex portions 114. The structure for attaching the fixing wire spring 4 to the convex portion 114 is a structure that fits into a groove formed in the convex portion 114, as in the above embodiments.

  The fixing wire spring 4 is formed of an elastic wire such as stainless steel, and the fixing wire spring 4 has a substantially arc shape that surrounds the entire circumference of the fitting insertion hole 11H. Further, the fixing wire spring 4 has a clamp portion 4 a having a structure in which both ends overlap at one place around the can 30. The clamp portion 4a includes a horizontal pressing bar 4a1, an inclined slide bar 4a2, and a rectangular bent portion 4a3.

  When the stator 11 to which the fixing wire spring 4 is attached is attached to the upper portion of the valve body 20 ', the can 30 is fitted into the fitting insertion hole 11H of the stator 11 as indicated by the arrow P in FIG. The clamp portion 4a is engaged with the locking projection 26. At this time, the locking projection 26 gets over the boundary between the slide bar 4a2 and the rectangular bent portion 4a3 while pushing down the slide bar 4a2. The locking projection 26 is fitted into the rectangular bent portion 4a3, and the pressing bar 4a1 presses the upper surface of the locking projection 26. As a result, the fixing wire spring 4 and the stator 11 are fixed to the valve body 20 ′ and the can 30.

  13 is a side view of the motor-operated valve according to the fifth embodiment, FIG. 14 is a front view of the motor-operated valve according to the fifth embodiment, and FIG. 15 is a view taken along the line AA in FIG. FIG. 16 is a bottom view and a side view of the fixing wire spring in the fifth embodiment.

  The difference between the fifth embodiment and the first embodiment is that the structure of the fixing wire spring 5 as an “elastic member” and the fixing wire spring 5 are fixed to the valve body 20. The attachment structure of the wire spring 5 for fixing to the 111 and the rectangular protrusion 112 is the same as that of the first embodiment. Further, the “valve device” of the fifth embodiment is the same as that of the second embodiment, and the valve main body 20, the can 40 and the fixing member 25 constitute a “valve device”.

  The fixing wire spring 5 is formed of an elastic wire material such as stainless steel, and the fixing wire spring 5 has a substantially arc shape that surrounds the entire circumference of the fitting insertion hole 11H. Further, the fixing wire spring 5 has a clamp portion 5 a having a structure in which both end portions are overlapped at one place around the fixing member 25. The clamp portion 5a includes an inclined slide bar 5a1, an arc portion 5a2 bent in an arc shape that matches the first joint tube 21 serving as a “locking convex portion”, an inclined slide bar 5a3, and a first joint. It is comprised by the circular arc part 5a4 bent in the circular arc shape which aligns with the pipe | tube 21. FIG. The slide bar 5a1 and the arc part 5a2 and the slide bar 5a3 and the arc part 5a4 extend in the direction of the axis L, respectively.

  Further, the fixing wire spring 5 includes one horizontal mountain-shaped portion 5b as a “fixing means” located at the center of the clamp portion 5a and two inclined mountain-shaped portions between the horizontal mountain-shaped portion 5b and the clamp portion 5a. 5c, 5c. The horizontal chevron 5b is formed so as to protrude inside the fixing wire spring 5 in a plane perpendicular to the axis L. The inclined chevron portions 5c, 5c are formed so as to protrude inward of the fixing wire spring 5 and to incline with respect to the axis L side and protrude toward the stator 11 side. Moreover, the part between the clamp part 5a and the inclined chevron part 5c and the part between the horizontal chevron part 5b and the inclined chevron part 5c are the connection parts 5d, respectively. Further, in the fixing wire spring 5, the horizontal chevron part 5 b is fitted to the trapezoidal part 111 a of the fixed convex part 111, and the inclined chevron parts 5 c and 5 c are arranged between the fixed convex part 111 and the rectangular convex part 112. . Furthermore, the fixing wire spring 5 is attached to the stator 11 by fitting and inserting the connecting portions 5 d into the circular arc grooves 112 a of the rectangular convex portions 112. With the structure as described above, in particular, the fixing wire spring 1 is configured such that the connecting portion 5d can slide in the groove direction within the arc groove 112a.

  When the stator 11 to which the fixing wire spring 5 is attached is attached to the upper portion of the valve body 20, the can 30 is fitted into the insertion hole 11H of the stator 11 in the direction of the arrow P in FIG. Engages with the joint pipe 21. At this time, the first joint 21 is. While pushing and expanding the slide bar 5a1 and the slide bar 5a3, the boundary between the slide bars 5a1 and 5a3 and the arc portions 5a2 and 5a4 is overcome. And the 1st joint pipe | tube 21 is fitted so that it may be inserted | pinched in circular arc part 5a2, 5a4. As a result, the fixing wire spring 5 and the stator 11 are fixed to the valve device including the valve main body 20, the can 40 and the fixing member 25.

  As shown in FIGS. 13 and 15, the protruding end of the inclined chevron 5c of the fixing wire spring 5 is in pressure contact with the yoke 11c of the stator 11 around the fitting insertion hole 11H, thereby the yoke 11c. The fixing wire spring 5 is electrically grounded. Further, as shown by a one-dot chain line in FIG. 16, the protruding end of the horizontal chevron 5b of the fixing wire spring 5 is fitted into a recess 25a formed on the outer periphery of the fixing member 25, and the fixing wire spring 5 and the fixing member 25 are The ground is electrically grounded at the recess 25a and the horizontal chevron 5b. Thereby, the electrical noise between the yoke 11c and the can 30 can be prevented. Further, when the fixing wire spring 5 moves in the direction of the axis L in the direction of the axis L at the time of attachment, the horizontal chevron 5b is elastically deformed so as to open against the elastic force. Even in the form, the connecting portion 5d is slidable in the groove direction in the arc groove 112a of the rectangular convex portion 112, so that the elastic deformation of the horizontal chevron portion 5b is facilitated.

  17 is a side view of the motor-operated valve according to the sixth embodiment, FIG. 18 is a front view of the motor-operated valve according to the sixth embodiment, and FIG. 19 is a view taken along the line AA in FIG. FIG. 20 is a bottom view and a side view of the fixing wire spring in the sixth embodiment.

  The difference between the sixth embodiment and the fifth embodiment is that the structure of the fixing wire spring 6 as an “elastic member” and the fixing wire spring 6 are fixed to the valve body 20. The mounting structure of the wire spring 5 for fixing to the 111 and the rectangular protrusion 112 is the same as that of the fifth embodiment.

  The fixing wire spring 6 is formed of an elastic wire material such as stainless steel, and the fixing wire spring 6 has a substantially arc shape surrounding the entire circumference of the fitting insertion hole 11H. Further, the fixing wire spring 6 has a clamp portion 6 a having a structure in which both end portions are overlapped at one place around the fixing member 25. The clamp portion 6a is bent into an arcuate shape that matches the inclined slide bar 6a1, an arc portion 6a2 that is bent into an arc shape that matches the first joint tube 21, an inclined slide bar 6a3, and the first joint tube 21. And the circular arc portion 6a4. The slide bar 6a1 and the circular arc part 6a2 extend above the first joint 21, and the slide bar 6a3 and the circular arc part 6a4 extend below the first joint 21 in directions intersecting the axis L, respectively.

  In addition, the fixing wire spring 6 includes one horizontal mountain-shaped portion 6b as a “fixing means” located at the center of the equidistant from the clamp portion 6a, and two inclined mountain-shaped portions between the horizontal mountain-shaped portion 6b and the clamp portion 6a. 6c, 6c. The horizontal chevron 6b is formed so as to protrude inside the fixing wire spring 6 in a plane perpendicular to the axis L. The inclined chevron portions 6c, 6c are formed so as to protrude toward the inside of the fixing wire spring 6 and to be inclined with respect to the axis L side and protrude toward the stator 11 side. Moreover, the part between the clamp part 6a and the inclined chevron part 6c, and the part between the horizontal chevron part 6b and the inclined chevron part 6c are each a connecting part 6d. In the fixing wire spring 6, the horizontal chevron 6 b is fitted to the trapezoidal part 111 a of the fixed convex part 111, and the inclined chevron parts 6 c and 6 c are arranged between the fixed convex part 111 and the rectangular convex part 112. . Furthermore, the wire spring 6 for fixing is attached with respect to the stator 11 by fitting the connection part 6d in the circular arc groove 112a of the rectangular convex part 112, respectively. With the structure as described above, the connecting wire spring 6 is particularly slidable in the groove direction within the arc groove 112a in the connecting portion 6d.

  When the stator 11 to which the fixing wire spring 6 is attached is attached to the upper portion of the valve body 20, the can 30 is fitted in the fitting insertion hole 11H of the stator 11 in the direction of arrow P in FIG. The clamp portion 6a is engaged with the first joint pipe 21. At this time, the first joint 21 is. While pushing and expanding the slide bar 6a1 and the slide bar 6a3, the boundary between the slide bars 6a1 and 6a3 and the arc portions 6a2 and 6a4 is overcome. And the 1st joint pipe | tube 21 fits in circular arc part 6a2, 6a4. As a result, the fixing wire spring 6 and the stator 11 are fixed to the valve device including the valve main body 20, the can 40 and the fixing member 25.

  As shown in FIGS. 17 and 19, the protruding end of the inclined chevron 6c of the fixing wire spring 6 is in pressure contact with the yoke 11c of the stator 11 around the fitting insertion hole 11H. The fixing wire spring 6 is electrically grounded. Further, as shown by a one-dot chain line in FIG. 20, the protruding end of the horizontal chevron 6b of the fixing wire spring 6 is fitted into a recess 25a formed on the outer periphery of the fixing member 25, and the fixing wire spring 6 and the fixing member 25 are These are electrically grounded at the recess 25a and the horizontal chevron 6b. Thereby, the electrical noise between the yoke 11c and the can 30 can be prevented. In addition, when the fixing wire spring 6 moves around the outer periphery of the fixing member 25 in the direction of the axis L during the attachment, the horizontal chevron 6b is elastically deformed so as to open against the elastic force. Even in the configuration, the connecting portion 6d is slidable in the groove direction within the arc groove 112a of the rectangular convex portion 112, so that the elastic deformation of the horizontal chevron 6b is facilitated.

  In each of the above embodiments, with the lower end position of the magnet rotor defined by the rotation stopper mechanism 50 as a reference position, the magnetic rotor pole, the can recess, the fixing wire spring fixing position, and the stator pole teeth axis The positions around L are preset with respect to the reference position. And it fixes to the said set position with the wire spring for fixation.

  FIG. 21 is a diagram illustrating the refrigeration cycle system of the embodiment. In the figure, reference numeral 100 denotes an electric valve of each embodiment of the present invention that constitutes an expansion valve, 200 denotes an outdoor heat exchanger mounted on the outdoor unit, 300 denotes an indoor heat exchanger mounted on the indoor unit, and 400 denotes four-way A flow path switching valve constituting the valve, 500 is a compressor. The motor-operated valve 100, the outdoor heat exchanger 200, the indoor heat exchanger 300, the flow path switching valve 400, and the compressor 500 are connected by conduits as shown in the figure, and constitute a heat pump refrigeration cycle. The accumulator, pressure sensor, temperature sensor, etc. are not shown.

  The flow path of the refrigeration cycle is switched by the flow path switching valve 400 into a flow path during cooling operation and a flow path during heating operation. During the cooling operation, as indicated by solid arrows in the figure, the refrigerant compressed by the compressor 500 flows into the outdoor heat exchanger 200 from the flow path switching valve 400, and the outdoor heat exchanger 200 functions as a condenser. The refrigerant liquid flowing out of the outdoor heat exchanger 200 flows into the indoor heat exchanger 300 via the motor-operated valve 100, and the indoor heat exchanger 300 functions as an evaporator.

  On the other hand, during heating operation, the refrigerant compressed by the compressor 500 is transferred from the flow path switching valve 400 to the indoor heat exchanger 300, the electric valve 100, the outdoor heat exchanger 200, the flow path, as indicated by the broken arrows in the figure. The switching valve 400 and the compressor 500 are circulated in this order, and the indoor heat exchanger 300 functions as a condenser and the outdoor heat exchanger 200 functions as an evaporator. The electric valve 100 decompresses and expands the refrigerant liquid flowing from the outdoor heat exchanger 200 during the cooling operation or the refrigerant liquid flowing from the indoor heat exchanger 300 during the heating operation, and further controls the flow rate of the refrigerant.

  Although the “valve device” in the embodiment includes a fixing member, the valve device may have a structure in which the can is directly joined to the valve body without the fixing member. For example, in FIG. 5, the fixing member 24 may be eliminated, and the lower end of the can 30 may be fixed to the outer periphery of the upper end of the valve body 20 by welding or the like. In FIG. 6, the fixing member 25 may be eliminated, the lower part of the can 40 may be extended, and the lower end thereof may be fixed to the outer periphery of the upper end of the valve body 20 by welding or the like. Further, in FIG. 6, the fixing member 25 is extended downward instead of the valve body 20, and this cylindrical member is referred to as a “valve body”, and the first joint 21, the second joint 22, and the valve are connected to the “valve body”. A structure in which the seat member 23 is assembled may be used.

  As described above, the embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to these embodiments, and the design can be changed without departing from the scope of the present invention. Is included in the present invention.

DESCRIPTION OF SYMBOLS 1 Fixed wire spring 1a Bending part 1b Horizontal angle part 1c Inclined angle part 1d Connecting part 10 Stepping motor (motor part)
DESCRIPTION OF SYMBOLS 11 Stator 11A Coil part 11B Coil part 11c Coupling 11H Insertion hole 110 Mold resin 111 Fixed convex part 112 Rectangular convex part 12 Magnet rotor 12a Protrusion part 121 Magnetizing member 20 Valve main body 21 1st joint pipe (locking convex part )
22 second joint pipe 23 valve seat member 23a valve port 30 can 30a recess 43 valve member 43b valve body 50 rotation stopper mechanism 51 spiral guide wire body 52 movable stopper member 40 can 25 fixing member 25a recess 3 fixing wire spring 3a bending portion 3b Horizontal chevron 3c Inclined chevron 3d Connecting part 11 'Stator 113 Fixing hole 4 Fixing wire spring 4a Clamping part 4a1 Pressing bar 4a2 Slide bar 4a3 Rectangular bent part 20' Valve body 26 Locking protrusion (locking convex part) )
5 fixing wire spring 5a clamp part 5a1 slide bar 5a2 arc part 5a3 slide bar 5a4 arc part 5b horizontal mountain part 5c inclined chevron part 5d connecting part 6 fixing wire spring 6a clamp part 6a1 slide bar 6a2 arc part 6a3 slide bar 6a4 arc part 6b Horizontal chevron 6c Inclined chevron 6d Connecting part L Axis

Claims (10)

A valve device in which a cylindrical can containing a magnet rotor of the motor unit is assembled to a valve body incorporating a valve member that operates by driving the motor unit, and the motor unit is configured and the axis is the center A stator having a cylindrical fitting insertion hole, and the stator is mounted on the valve device by fitting the can into the fitting insertion hole of the stator,
An electrically operated valve comprising an elastic member partially engaged with the stator and held by the stator, wherein the stator is fixed to the valve device by a fixing means provided on the elastic member.   The motor-operated valve according to claim 1, wherein the elastic member is configured by a member that surrounds the entire circumference or substantially the entire circumference of the fitting insertion hole of the stator.   The elastic member is composed of a wire, and an arc groove concentric with the axis is formed around the fitting insertion hole in the stator, and a part of the elastic member is inserted into the arc groove. The motor-operated valve according to claim 2, wherein   The said fixing means of the said elastic member is a horizontal mountain-shaped part which protrudes in the said insertion hole side, and fits into the recessed part by the side of the said valve apparatus, It is any one of Claim 1 thru | or 3 characterized by the above-mentioned. Motorized valve.   The electric device according to any one of claims 1 to 3, wherein the fixing means of the elastic member is a clamp portion engaged with a locking convex portion provided on the valve device side. valve.   The locking projection is a locking projection protruding horizontally on the side of the valve device, and the locking portion is rotated in the direction of rotating about the axis with respect to the locking projection. The motor-operated valve according to claim 5, wherein the motor-operated valve is configured to engage with a stopping projection.   The locking convex part is a joint pipe projecting horizontally on the side of the valve device, and the clamp part is configured to move in the axial direction relative to the joint pipe and engage with the joint pipe. The motor-operated valve according to claim 5, wherein:   The engaging convex part is a joint pipe projecting horizontally on a side part of the valve device, and the clamp part is engaged with the joint pipe in a direction rotating around the axis with respect to the joint pipe. The motor-operated valve according to claim 5, wherein the motor-operated valve is configured.   The motor-operated valve according to any one of claims 1 to 8, wherein the valve device and a yoke of the stator are electrically grounded by the elastic member.   A refrigeration cycle system including a compressor, a condenser, an expansion valve, and an evaporator, wherein the motor-operated valve according to any one of claims 1 to 9 is used as the expansion valve. A refrigeration cycle system characterized by that.

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