JP2018150968A - Motor valve and refrigeration cycle system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate processing and to attain downsizing by reducing thickness of a member of a valve housing 1 for a metal fixture 23 of a support member 2 and a sealed case 3 in a motor valve 100 configured by assembling the support member 2 and the sealed case 3 to the valve housing 1 in the motor valve.SOLUTION: The support member 2 consists of: a base part 21 that is inserted into an opening of a cylinder of the valve housing 1; a holder part 22; and a fixture metal 23 which is provided in an outer periphery of the base part 21 and inserted into an inner periphery of the valve housing 1 together with the base part 21. The base part 21 and the fixture metal 23 are inserted or press-fitted inside of the valve housing 1 in the direction of an axial line L. In such a state, the fixture metal 23 and the valve housing 1 are fixed by welding or the like.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an electric valve and a refrigeration cycle system used for a refrigeration cycle system and the like.

  Conventionally, as this kind of motor-operated valve, for example, there is one disclosed in JP-A-2016-89870 (Patent Document 1). This electric valve moves the rotor shaft and the valve member forward and backward through a screw feed mechanism by the rotation of the magnet rotor and rotor shaft of the stepping motor, and controls the opening degree of the valve port by the valve member. The rotor shaft is supported by a support member. Furthermore, in this type of motorized valve, it is necessary to seal the fluid flow path, and the magnet rotor of the motor unit is housed in a cylindrical sealing case (can) that forms a sealing structure together with the valve housing as the valve body. ing. The support member and the sealing case are assembled to the valve housing and fixed by welding or the like.

Japanese Patent Laid-Open No. 2006-89870

  FIG. 8 is a view showing the fixing structure of the support member and the sealing case in the conventional motor-operated valve. Reference numeral L in the drawing is an axis that is the center of the valve housing 10 and the support member 20. In this conventional technique, a part of the support member 20 is inserted into the opening of the valve housing 10, and the fixing bracket 20 a is brought into contact with the end surface 10 a around the opening of the valve housing 10. And the contact location of this fixture 20a and the valve housing 10 is adhere | attached by welding. The sealed case 30 is also fixed to the end face 10a of the opening of the valve housing 10 by welding.

  As described above, in the conventional technique, the support member and the sealing case are fixed by welding with the same end surface around the opening of the valve housing as a receiving surface, so that only the fixing bracket can be placed on the end surface around the opening of the valve housing. It is necessary to secure an area. For this reason, the thickness of the member of a valve housing becomes thick, and there exists the following problems. When the valve housing is manufactured by press processing, the thickness of the member increases, so that the processing load increases because the processing load increases, and product management becomes difficult and cost increases. Moreover, more materials than necessary are required for the pressure vessel. Further, the outer dimension of the valve housing increases as the thickness of the member increases.

  The present invention relates to a motor-operated valve in which a support member for supporting a rotor shaft on an axis is assembled to the valve body, and the arrangement of the fixing brackets of the support member is improved to reduce an increase in the thickness of the valve body member. The task is to do.

  The motor-driven valve according to claim 1 controls the opening degree of the valve port by moving the valve member forward and backward by the rotation of the rotor shaft of the motor unit, and also with respect to the metal valve body having a cylindrical shape incorporating the valve member. The motor-operated valve is formed by assembling a support member for supporting the rotor shaft on an axis, and the support member is provided on a base portion inserted into a cylindrical opening of the valve body, and provided on an outer periphery of the base portion. A fixing fitting inserted into the inner periphery of the valve body together with the base, the fixing fitting being inserted in the axial direction inside the valve body, and a part of the fixing fitting being the valve body The fixing bracket and the valve main body are fixed in a state where they are exposed from the surface.

  A motor-driven valve according to a second aspect is the motor-operated valve according to the first aspect, wherein at least one of the base portion and the fixing bracket of the support member is press-fitted into the valve body.

  The motor-driven valve according to claim 3 is the motor-operated valve according to claim 1, wherein the valve body includes a large-diameter portion on the opening side, a small-diameter portion having a smaller diameter than the large-diameter portion, and the large-diameter portion. And a taper portion that decreases in diameter from the small diameter portion, and the base portion of the support member is press-fitted into the small diameter portion of the valve body.

  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 bracket includes a donut disk-shaped flat plate portion centered on the axis, and the flat plate portion. It is comprised by the side part extended in parallel with respect to the said axis line from outer periphery, The said side part is provided in the outer periphery of the said base.

The motor-operated valve according to claim 5 is the motor-operated valve according to any one of claims 1 to 4, wherein the base portion of the support member is made of resin, and the support member connects the fixing bracket to the base portion. And a member formed by insert molding.

  A motor-driven valve according to a sixth aspect is the motor-operated valve according to any one of the first to fifth aspects, wherein the fixing bracket and the valve body are fixed by welding.

  The refrigeration cycle system of claim 7 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 6 is used. It is used as the expansion valve.

  According to the motor-operated valve of claims 1 to 6, since the support member and the fixture are inserted in the axial direction with respect to the valve body, a space for arranging the fixture is required on the end face of the opening of the valve body. Therefore, it is not necessary to thicken the valve body member (plate material or the like). Therefore, processing of the valve body is facilitated, product management is facilitated, and costs are reduced without requiring more material than necessary. Moreover, the outer dimension of the valve body can be reduced.

  According to the motor-operated valve of claim 2, since at least one of the base portion of the support member and the fixing bracket is press-fitted into the valve body, the centering of the support member becomes accurate with respect to the valve body, and the assembly work is easy. become.

  According to the motor-operated valve of claim 3, since the base portion of the support member is press-fitted into the small-diameter portion of the valve body, the base portion can be guided by the tapered portion and pressed into the small-diameter portion when the support member is assembled. Becomes easier.

  According to the motor-operated valve of claim 4, since the fixing bracket is shaped so as to substantially cover the base portion with the doughnut-like flat plate portion and the side surface portion, the fixing bracket fits to the base portion, The base can be secured.

  According to the electric valve of the fifth aspect, since the support member is a member formed by insert molding together with the fixing bracket, the support member can be easily handled during assembly.

  According to the electric valve of the sixth aspect, the fixing bracket and the valve body can be firmly fixed.

  According to the refrigeration cycle system of the seventh aspect, the same effects as in the first to sixth aspects can be obtained.

It is a longitudinal cross-sectional view of the motor operated valve of 1st Embodiment of this invention. It is an expanded sectional view of the fixture in the motor operated valve of a 1st embodiment. It is an expanded sectional view of the assembly | attachment part of the valve housing in the motor operated valve of 1st Embodiment, a supporting member, and a sealing case. It is an expanded sectional view of the assembly | attachment part of the valve housing in a motor operated valve of 2nd Embodiment, a supporting member, and a sealing case. It is an expanded sectional view of the assembly | attachment part of the valve housing in a motor operated valve of 3rd Embodiment, a supporting member, and a sealing case. It is an expanded sectional view of the assembly | attachment part of the valve housing in a motor operated valve of 4th Embodiment, a supporting member, and a sealing case. It is a figure showing the refrigerating cycle system of an embodiment. It is an expanded sectional view of the assembly part of the valve housing in a conventional motor operated valve, a supporting member, and a sealing case.

  Next, an embodiment of an electric valve and a refrigeration cycle system of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view of the motor-operated valve according to the first embodiment, FIG. 2 is an enlarged cross-sectional view of a fixing bracket in the motor-operated valve according to the first embodiment, and FIG. It is an expanded sectional view of the assembly part of an airtight case. Note that the concept of “upper and lower” in the following description corresponds to the upper and lower sides in the drawing of FIG.

  The electric valve 100 includes a valve housing 1 as a “valve body”, a support member 2, a sealing case 3, a stepping motor 4 as a “motor part”, a needle valve 5 as a “valve member”, a valve Holder 6.

  The valve housing 1 is formed in a substantially cylindrical shape with a metal such as brass or stainless steel, and has a valve chamber 1R inside thereof. A first joint pipe 11 connected to the valve chamber 1R is connected to one outer peripheral side of the valve housing 1, and a second joint pipe 12 is connected to a cylindrical portion extending downward from the lower end. A valve seat ring 13 is fitted to the valve chamber 1R side of the second joint pipe 12. The inside of the valve seat ring 13 serves as a valve port 13a, and the second joint pipe 12 is conducted to the valve chamber 1R through the valve port 13a. The first joint pipe 11, the second joint pipe 12 and the valve seat ring 13 are fixed to the valve housing 1 by brazing or the like.

  The support member 2 includes a base portion 21 partially inserted into the valve housing 1, a holder portion 22 erected from the base portion 21 at the center on the stepping motor 4 side, and a fixing bracket 23. The base portion 21 and the holder portion 22 are made of resin. As shown in FIG. 2, the fixing bracket 23 is formed by pressing a metal plate such as brass or stainless steel, and is a rotating body that can be rotated by rotating the cross-sectional shape (shaded portion) shown in the drawing around the axis L. It is the shape. The fixing bracket 23 includes a doughnut-like flat plate portion 231 centered on the axis L and a thin cylindrical side portion 232 extending in parallel to the axis L from the outer periphery of the flat plate portion 231. The fixing bracket 23 is provided integrally with the resin base 21 and the holder 22 by insert molding. Thereby, a part of the flat plate portion 231 is provided in the base portion 21, and the side surface portion 232 is provided on the outer periphery of the base portion 21.

  As will be described later, the support member 2 is assembled to the valve housing 1 and is fixed to the upper end portion of the valve housing 1 by welding via a fixture 23. In this embodiment, it is fixed by welding. However, it is fixed by brazing or the like, and a fixing member for fixing the support member 2 to the valve housing 1 is added and fixed by appropriate means such as caulking. Also good. Further, in the center of the support member 2, a female screw portion 2a coaxial with the axis L and a screw hole thereof are formed, and a cylindrical guide hole 2b having a diameter larger than that of the screw hole of the female screw portion 2a is formed. .

  The sealed case 3 is formed in a substantially cylindrical shape whose upper end is closed, and is hermetically fixed to the upper end of the valve housing 1 by welding. A guide holding cylinder 31 is fitted into the upper portion of the sealed case 3, and a guide 32 is fitted into a central cylinder portion 31 a of the guide holding cylinder 31. The guide 32 has a guide hole 32 a in the center. ing. On the outer periphery of the cylindrical portion 31 a, a movable stopper member 34 that is fitted with the spiral guide wire 33 and screwed into the spiral guide wire 33 is provided.

  The stepping motor 4 includes a rotor shaft 41, a magnet rotor 42 rotatably disposed inside the sealed case 3, a stator coil 43 disposed opposite to the magnet rotor 42 on the outer periphery of the sealed case 3, and the like. Further, it is configured by a yoke, an exterior member or the like (not shown). The rotor shaft 41 is attached to the center of the magnet rotor 42 via a bush 421, and a male screw portion 41a is formed on the outer periphery of the rotor shaft 41 on the support member 2 side. The male screw portion 41 a is screwed into the female screw portion 2 a of the support member 2. As a result, the support member 2 supports the rotor shaft 41 on the axis L. Further, the upper end portion of the rotor shaft 41 is rotatably fitted in the guide hole 32a of the guide 32.

  The needle valve 5 has a needle portion 51 and a boss portion 52 that are inserted into the valve port 13 a, and the boss portion 52 is fixed to the lower end of the valve holder 6.

  The valve holder 6 is a cylindrical member, and is fitted in the guide hole 2b of the support member 2 so as to be slidable in the direction of the axis L. A spring receiver 61 is provided in the valve holder 6 so as to be movable in the direction of the axis L, and a compression coil spring 62 is attached between the spring receiver 61 and the needle valve 5 with a predetermined load applied. In the guide hole 2 b of the support member 2, the upper end of the valve holder 6 is engaged with the lower end of the rotor shaft 41, and the valve holder 6 and the needle valve 5 are rotatably suspended by the rotor shaft 41. It is supported.

  With the above configuration, the magnet rotor 42 and the rotor shaft 41 are rotated by the driving of the stepping motor 4, and the rotor shaft 41 is rotated by the screw feed mechanism between the male screw portion 41 a of the rotor shaft 41 and the female screw portion 2 a of the support member 2. Move in the L direction. The needle valve 5 moves in the direction of the axis L and approaches or separates from the valve seat ring 13. Thereby, the opening degree of the valve port 13a is controlled, 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.

  Further, the magnet rotor 42 is formed with a protrusion 42 a, and the protrusion 42 a kicks the movable stopper member 34 with the rotation of the magnet rotor 42, so that the movable stopper member 34 and the spiral guide wire 33 are It moves up and down while turning by screwing. The movable stopper member 34 abuts on the lower end stopper 33a of the spiral guide wire 33, whereby the lowermost position of the rotor shaft 41 (and the magnet rotor 42) is regulated. Further, when the movable stopper member 34 contacts the upper end stopper 31 b of the guide holding cylinder 31, the uppermost end position of the rotor shaft 41 is regulated.

  As described above, the motor-operated valve 100 controls the opening degree of the valve port 13a by moving the needle valve 5 (valve member) forward and backward by the rotation of the rotor shaft 41 of the stepping motor 4 (motor unit) and incorporates the needle valve 5 therein. This is a motor-operated valve in which a support member 2 that supports the rotor shaft 41 on the axis L is assembled to the cylindrical valve housing 1 (valve body).

  As described above, the lowermost position of the rotor shaft 41 (and the magnet rotor 42) is regulated by the movable stopper member 34 on the sealed case 3 side coming into contact with the lower end stopper 33a. Sometimes: First, when an assembly in which the rotor shaft 41 or the like is assembled to the support member 2 is attached to the valve housing 1, the support member 2 for the valve housing 1 is set so that the positional relationship between the needle valve 5 and the valve port 13a is a predetermined condition. Adjust the push-in amount. Then, in a state where the rotor shaft 41 (and the magnet rotor 42) is at the lowest end position and the movable stopper member 34 is in contact with the lower end stopper 33a, the movable stopper member 34 corresponds to the protrusion 42a of the magnet rotor 42. The sealing case 3 is assembled at such a position.

  In the first embodiment, as shown in FIG. 3, the fixing bracket 23 of the support member 2 has the side surface portion 232 press-fitted or inserted in the direction of the axis L to a predetermined position inside the valve housing 1. A part of the outer peripheral surface of the side surface portion 232 of the 23 is exposed from the annular end surface 1 a of the valve housing 1. Then, at the predetermined position, the corner portion formed by the annular end surface 1a of the valve housing 1 and the exposed outer peripheral surface of the side surface portion 232 is welded, and the melted and solidified portion P is formed. Thus, in order to weld the corners, for example, a welding laser or the like can be irradiated obliquely with respect to the axis L. Therefore, it is not necessary to weld the annular end surface 1a from directly above, and the welding can be easily performed without being obstructed by components such as the magnet rotor 22 provided on the upper portion of the valve housing 1. Further, in the outermost periphery of the annular end surface 1a of the valve housing 1, the opening end portion of the lower end of the sealed case 3 is brought into contact, and the entire periphery of the contact portion is welded to form the melted and solidified portion Q in the entire periphery. ing. Thereby, the support member 2 and the sealing case 3 are fixed to the valve housing 1.

  FIG. 4 is an enlarged cross-sectional view of a part where the valve housing, the support member, and the sealing case are assembled in the electric valve according to the second embodiment. The difference between the second embodiment and the first embodiment is that a part of the base portion 21 ′ of the support member 2 has the same diameter as the outer periphery of the side surface portion 232 of the fixing bracket 23. The same as FIG. In the following second to fourth embodiments, the same elements as those in the first embodiment and corresponding elements are denoted by the same reference numerals as those in FIGS. Omitted.

  In the second embodiment, the support member 2 is such that the side surface portion 232 and the base portion 21 ′ of the fixing bracket 23 are press-fitted or inserted in the direction of the axis L to a predetermined position inside the valve housing 1. A part of the outer peripheral surface of the side surface portion 232 is exposed from the annular end surface 1 a of the valve housing 1. Then, at the predetermined position, the corner portion formed by the annular end surface 1a of the valve housing 1 and the exposed outer peripheral surface of the side surface portion 232 is welded, and the melted and solidified portion P is formed. In the second embodiment, since the resin base 21 'serves as a guide and is first press-fitted or inserted into the valve housing 1, the assembling work is facilitated.

  FIG. 5 is an enlarged cross-sectional view of a part where the valve housing, the support member, and the sealing case are assembled in the electric valve according to the third embodiment. The difference between the third embodiment and the second embodiment is that the outer diameter of the side surface portion 232 ′ of the fixing bracket 23 is slightly smaller than the outer diameter of the base portion 21 ′. This is the same as the embodiment.

  In the third embodiment, the support member 2 is configured such that the base 21 ′ is press-fitted in the direction of the axis L to a predetermined position inside the valve housing 1, and the side surface 232 ′ of the fixing bracket 23 is inside the valve housing 1. It is inserted in the direction of the axis L to a predetermined position. A part of the outer peripheral surface of the side surface portion 232 ′ of the fixing fitting 23 is exposed from the annular end surface 1 a of the valve housing 1. Further, at the predetermined position, a corner portion formed by the annular end surface 1a of the valve housing 1 and the exposed outer peripheral surface of the side surface portion 232 'is welded, and the melted and solidified portion P is formed. In the third embodiment, since the resin base 21 'serves as a guide and only the base 21' is press-fitted into the valve housing 1, the support member 2 can be assembled more easily than the second embodiment. Furthermore, the assembly work becomes easier.

  FIG. 6 is an enlarged cross-sectional view of a part where the valve housing, the support member, and the sealing case are assembled in the electric valve of the fourth embodiment. The difference between the fourth embodiment and the third embodiment is that the diameter of the base portion 21 ″ of the support member 2 is smaller than the outer diameter of the side surface portion 232 ′ of the fixture 2 and the shape of the valve housing 1 ′. Other structures are the same as those of the third embodiment.

  The valve housing 1 'in the fourth embodiment includes a large diameter portion 1A having the same diameter as the valve housing 1 in the first embodiment, a small diameter portion 1B having a smaller diameter than the large diameter portion 1A, and a small diameter portion from the large diameter portion 1A. And a tapered portion 1C that is reduced in diameter toward 1B. The shape of the valve housing 1 ′ is a rotating body (like the first joint pipe 11) that can be produced by rotating the sectional shape (shaded portion) of FIG. 6 about the axis L in addition to the valve housing 1 of the first embodiment. (Excluding the fitting hole).

  In the fourth embodiment, the support member 2 is such that the base portion 21 ″ is press-fitted in the direction of the axis L to a predetermined position inside the small diameter portion 1B of the valve housing 1 ′, and the side surface portion 232 ′ of the fixing bracket 23 is the large diameter portion. It is inserted in the direction of the axis L to a predetermined position inside 1A, and a part of the outer peripheral surface of the side surface portion 232 'of the fixture 23 is exposed from the annular end surface 1a of the valve housing 1. At a predetermined position, a corner portion formed by the annular end surface 1a of the valve housing 1 'and the exposed outer peripheral surface of the side surface portion 232' is welded to form a melt-solidified portion P thereof. In the embodiment, the taper portion 1C serves as a guide for the resin base portion 21 ″, and the base portion 21 ″ can be guided by the taper portion 1C to be press-fitted into the small diameter portion 1B, so that the support member 2 can be easily assembled. And further assembly work Further, since the taper portion 1C creates a gap in the valve housing 1 above the small-diameter portion 1B, the burr generated when the base portion 21 is press-fitted can be confined to this gap, affecting welding and the like. In order to provide such a gap, it does not have to be inclined as in the tapered portion 1 C. For example, the valve housing 1 may be provided with a step or the like.

  According to each embodiment described above, since the support member 2 and the fixture 23 are inserted in the direction of the axis L with respect to the valve housings 1 and 1 ', the fixtures are attached to the annular end surface 1a of the valve housings 1 and 1'. Does not require space for placing. Accordingly, it is not necessary to thicken the plate material or the like for molding the valve housing 1, 1 '. Therefore, the processing of the valve housings 1 and 1 'becomes easy and product management becomes easy. Moreover, the cost is reduced without requiring more materials than necessary. Further, the outer dimensions of the valve housings 1 and 1 'can be reduced. Further, since at least one of the bases 21, 21 ′, 21 ″ of the support member 2 and the fixing bracket 23 is press-fitted into the valve housing 1, the centering of the support member 2 with respect to the valve housing 1 becomes accurate.

  Further, since the fixing bracket 23 is shaped so as to substantially cover a part of the bases 21, 21 ′, 21 ″ with the flat plate portion 231 and the side surface portions 232, 232 ′ having a donut disk shape, the base portions 21, 21 ′ are formed. , 21 ″ can be secured. Further, since the support member 2 is a member formed by insert molding of the fixing bracket 23 together with the bases 21, 21 ', 21 ", the support member can be easily handled during assembly.

  FIG. 7 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 liquid refrigerant 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, 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 liquid refrigerant flowing from the outdoor heat exchanger 200 during the cooling operation or the liquid refrigerant flowing from the indoor heat exchanger 300 during the heating operation, and further controls the flow rate of the refrigerant.

  Although one embodiment has been described above, the thickness of each part of the fixture 23 may be set as appropriate. For example, the thickness of the side portions 232 and 232 ′ may be a thickness that can be welded to the valve housing 1. Moreover, although the fixing bracket 23 of the present embodiment is formed by pressing, it may be formed by cutting or the like. Further, the welding of the fixture 23 and the valve housings 1 and 1 ′ may be all-around welding, not limited to all-around welding, and may be partial welding.

  Furthermore, although the fixing bracket in the embodiment has a cylindrical shape in which the side surface portion extends in parallel to the axis from the outer periphery of the flat plate portion, the fixing bracket may be configured in a disk shape. In that case, the outer peripheral part of the disk shape is a side part, and a part of this side part is exposed from the opening end face of the valve body, and is formed by the opening end face and the exposed outer peripheral face of the side face part. What is necessary is just to weld a corner.

  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.

1 Valve housing (valve body)
1a Annular end face 1R Valve chamber 11 First joint pipe 12 Second joint pipe 13 Valve seat ring 13a Valve port 2 Support member 2a Female thread part 2b Guide hole 21 Base part 22 Holder part 23 Fixing bracket 231 Flat part 232 Side face part 3 Sealing case 4 Stepping motor (motor part)
41 Rotor shaft 41a Male thread portion 42 Magnet rotor 43 Stator coil 5 Needle valve (valve member)
6 Valve holder P Melting and solidification part Q Melting and solidification part 1 'Valve housing (valve body)
1A Large-diameter portion 1B Small-diameter portion 1C Tapered portion 21 ′ Base portion 232 ′ Side surface portion 21 ″ Base L Axis 100 Electric valve 200 Outdoor heat exchanger 300 Indoor heat exchanger 400 Channel switching valve 500 Compressor

Claims (7)

The valve member is moved forward and backward by the rotation of the rotor shaft of the motor unit to control the opening degree of the valve port, and the rotor shaft is placed on the axis with respect to the cylindrical metal valve body incorporating the valve member. An electric valve formed by assembling a supporting member to be supported,
The support member has a base portion inserted into a cylindrical opening of the valve body, and a fixing fitting provided on an outer periphery of the base portion and inserted into the inner periphery of the valve body together with the base portion, The fixing bracket is inserted in the axial direction inside the valve body, and the fixing bracket and the valve body are fixed in a state where a part of the fixing bracket is exposed from the valve body. Features a motorized valve. The motor-operated valve according to claim 1, wherein at least one of the base portion and the fixing bracket of the support member is press-fitted into the valve body. The valve main body has a large-diameter portion on the opening side, a small-diameter portion having a smaller diameter than the large-diameter portion, and a tapered portion that decreases in diameter from the large-diameter portion to the small-diameter portion, The motor-operated valve according to claim 1, wherein the base portion is press-fitted into the small-diameter portion of the valve body. The fixing bracket includes a doughnut-like flat plate portion centered on the axis, and a side surface portion extending in parallel to the axis from the outer periphery of the flat plate portion, and the side surface portion is provided on the outer periphery of the base portion. The motor-operated valve according to any one of claims 1 to 3, wherein the motor-operated valve is provided. The motor-operated valve according to any one of claims 1 to 4, wherein the base portion of the support member is made of resin, and the support member is a member that is insert-molded with the base fitting together with the base portion. . The motor-operated valve according to any one of claims 1 to 5, wherein the fixing bracket and the valve body are fixed by welding. 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 6 is used as the expansion valve. A refrigeration cycle system characterized by that.

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