JP2016070382A - Motor-operated valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manufacture and provide a motor-operated valve which has high durability by fixing a spacer and a valve body favorably.SOLUTION: In a spacer 15 which is interposed and fixed between a guide bush and a valve body 2, a recess part 15a is provided at a cylindrical body of the spacer 15, and a small diameter part 15b and a large diameter part 15c are formed at the cylindrical body. By providing the small diameter part 15b and the large diameter part 15c, in fixing the valve body 2 and the spacer 15, the accuracy of positioning can be enhanced by the large diameter part 15c coming into contact with the valve body 2. Also, by a gap 110 being formed between the small diameter part 15b and the valve body 2, in fixing by soldering, the solder flows into the gap 110, and fixing between the valve body 2 and the spacer 15 can be performed favorably.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a motor-operated valve used as an expansion valve or the like in a refrigeration cycle, and particularly to increase the capacity of a valve chamber by interposing a spacer between a guide bush and a valve body that slidably supports a valve shaft. The present invention relates to an electric valve suitable for the above.

  Conventionally, an electric valve used by being incorporated in a refrigeration cycle such as an air conditioner or a refrigerator is a device that adjusts the flow rate of a fluid such as a refrigerant, and usually includes a valve body including a valve chamber and a valve seat; And a bottomed cylindrical can fixed to the upper portion of the valve body via a can receiving plate as a bowl-shaped portion. A rotor is built inside the can, and a center is provided outside the can. A stator having an insertion hole is externally fitted to the part, and rotation of the rotor is converted into vertical movement (advancement and retraction) of the valve shaft by, for example, a screw mechanism.

  As an example of such a motor-operated valve, the applicant has filed applications such as Patent Document 1 and Patent Document 2. The motor-operated valve disclosed in Patent Document 1 fixes the guide bush to the valve main body via a spacer surrounding the guide bush, thereby increasing the volume of the valve chamber and effectively reducing refrigerant passage noise. It is the composition which makes it. In addition, the motor-operated valve disclosed in Patent Document 2 allows the refrigerant to flow in a large amount instantaneously from the time the engine is started and the power is turned on, and the cooler air is blown out from the air conditioner to quickly reduce the vehicle interior temperature. It is a motorized valve.

JP 2011-27148 A JP 2012-87841 A

  In the electric valves of Patent Document 1 and Patent Document 2, in order to obtain a coaxial degree with respect to the valve body, the spacer needs to be brought into contact with the inside of the valve body. However, when attaching and fixing each of the valve main body, the spacer, and the fluid inflow pipe, a method is adopted in which a solder is installed so as to surround each contact portion from the outer periphery and fixed by brazing in the furnace. It must flow in such a way that a wax is interposed between the main body and the spacer, and it is necessary to provide a slight clearance for allowing the wax to flow in order to securely fix the brazing. That is, when trying to increase the accuracy of the coaxiality in order to improve the quality of the motorized valve, sufficient wax does not flow between the spacer and the valve body, as shown in an enlarged sectional view (described later) in FIG. There is a possibility that a void is formed and the brazing defect 120 is formed, and the valve body and the spacer are not fixed properly.

  An object of the present invention is to solve the above-described problem, and by flowing a sufficient amount of wax between the spacer and the valve body (and fluid inlet / outlet pipe) attached to the periphery of the spacer, the spacer and the valve body (and fluid inlet / outlet) are provided. It is an object to provide a motor-operated valve that can be accurately fixed to a tube) and can be well fixed.

  In order to solve the above problems, an electric valve according to the present invention has a valve chamber into which a fluid is introduced and a valve seat, and a valve body whose end opposite to the valve seat is an open end, and the valve chamber A first fluid inlet / outlet pipe communicating with the valve seat, a second fluid inlet / outlet pipe communicating with the valve seat, a valve shaft arranged to face the valve seat, and a guide bush for slidably supporting the valve shaft; A spacer disposed between the valve body and the guide bush, a can receiving plate disposed on the outer periphery of the spacer, a can attached to the outer periphery of the can receiving plate, and disposed in the can And a rotor connected to the valve shaft and driven to rotate by a stator disposed outside the can, and a screw mechanism for converting the rotational force of the rotor into the forward / backward movement of the valve shaft. , The spacer is the guide block. A cylindrical main body to which a shoe is fitted, and an outer peripheral flange portion provided at one end of the cylindrical main body and abutting against the opening end. A concave portion is formed in the outer peripheral portion of the cylindrical main body, and wax is poured into the concave portion. The valve main body and the spacer are joined together.

  According to this motor-operated valve, a gap for pouring wax can be formed between the spacer and the valve body.

  Furthermore, the motor-operated valve according to the present invention is characterized in that the concave portion is formed in the vicinity of the outer peripheral flange portion.

  Furthermore, in the motor-operated valve according to the present invention, a groove is formed on at least one of the lower surface and the upper surface so that a gap for low flow is generated on the contact surface between the lower surface of the outer peripheral flange portion and the upper surface of the valve body. It is characterized by that.

  Furthermore, in the motor-operated valve according to the present invention, the spacer includes an inner peripheral flange with which the end of the guide bush abuts on the other end of the cylindrical main body, and the recess is formed in the vicinity of the inner peripheral flange. It is characterized by that.

  Furthermore, in the motor-operated valve according to the present invention, the first fluid inlet / outlet pipe is inserted into a through hole provided in a side surface of the valve main body, the tip thereof is located below the spacer, and the wax is poured into the recess. When the valve body and the spacer are joined, the first fluid inlet / outlet pipe is also joined thereto.

  Furthermore, the motor-operated valve according to the present invention further includes a stator disposed outside the can and driving the rotor.

  In the motor-operated valve according to the present invention, by forming the gap, brazing can be poured into the gap during brazing. Accordingly, the spacer and the valve main body (and the fluid inlet / outlet pipe) can be fixed satisfactorily, and the durability of the electric valve can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view showing an embodiment of an overall configuration of an electric valve to which an embodiment of the present invention is applied. It is a principal part expanded sectional view before brazing of 1st Example of this invention, and is a figure of the part corresponded to the A section of FIG. It is a principal part expanded sectional view after brazing of 1st Example of this invention, and is a figure of the part corresponded to the A section of FIG. It is a principal part expanded sectional view after brazing in 2nd Example of this invention, and is a figure of the part corresponded to the A section of FIG. It is a principal part expanded sectional view after brazing of the conventional electrically operated valve, and is a figure of the part corresponded to the A section of FIG.

  Hereinafter, embodiments of a motor-operated valve according to the present invention will be described with reference to the accompanying drawings. FIG. 1 shows an example of the overall configuration of a motor-operated valve to which an embodiment of the present invention is applied. In the embodiment of FIG. 1, the vertical direction in the figure is expressed as “up and down”.

  In the motor-operated valve 1 shown in FIG. 1, the valve body 2 is formed with a cylindrical hole 10 constituting a valve chamber 20 as a cylindrical space having a constant inner diameter around a valve shaft 3 extending in the vertical direction. Yes. A valve seat 26 is formed at one end of the valve body 2, that is, at the bottom 11 of the hole 10, and is opened and closed by a valve body 31 provided at the tip of the valve shaft 3 to control the opening degree. An open end 12 of the hole 10 is opened upward at the upper end of the valve body 2 (that is, the other end of the valve body 2). A cylindrical spacer 15 is mounted on the opening end 12 side of the hole 10.

  A guide bush 4 that supports and guides the valve shaft 3 slidably in the opening / closing direction (vertical direction in FIG. 1) of the valve body 31 is a cylinder provided on the opening end 12 side of the hole 10 with respect to the valve body 2. It is fixed via a spacer 15. The spacer 15 includes a cylindrical main body 16 to which the guide bush 4 is fitted, and is formed as a cylindrical spacer as a whole. An outer peripheral portion near the upper end of the cylindrical main body 16 constituting the spacer 15 has an outer peripheral flange portion 17 that abuts the edge of the opening end 12 of the hole 10. By mounting on the edge, the mounting position of the spacer 15 in the hole 10 of the valve body 2 is determined. Further, an inner peripheral flange portion 18 on which a lower end portion of the guide bush 4 is provided is provided at an end portion on the bottom portion 11 side of the cylindrical main body 16. The valve shaft 3 guided by the guide bush 4 extends through the central hole of the inner peripheral flange portion 18. In the hole 10, the valve chamber 20 is formed closer to the bottom 11 than the inner peripheral flange 18 of the spacer 15.

  The spacer 15 is fixed to the valve body 2 by press fitting, and then the guide bush 4 is fixed to the spacer 15 by press fitting. In this way, by fixing the guide bush 4 to the valve body 2 via the spacer 15 surrounding the guide bush 4, the volume of the valve chamber 20 formed in the hole 10 can be expanded. That is, by using a valve body having a valve chamber having a large capacity and a spacer 15 prepared accordingly, the guide bush 4 is not made special (large) and the conventional product is used as it is. A motor-operated valve having a large volume of the chamber 20 can be obtained, and as a result, the refrigerant passing sound can be reduced and a large volume of fluid can be handled. The valve chamber 20 in the valve body 2 may be formed by cutting instead of forging when manufacturing accuracy is required, but it can also be manufactured by pressing, in which case mass production is possible. Can increase the sex.

  The valve body 2 is provided with a first fluid inlet / outlet pipe 24 connected to the valve chamber 20 and through which a fluid such as a refrigerant enters and exits, and a second fluid inlet / outlet pipe 25 connected to the valve seat 26. Since the distal end portion of the inner peripheral flange portion 18 of the spacer 15 is also used as a stopper 19 for the first fluid inlet / outlet pipe 24, the first fluid inlet / outlet 24 is connected when the first fluid inlet / outlet pipe 24 is connected to the valve body 2. The end portion 24a of the tube 24 abuts against the stopper 19, and the insertion depth is positioned. Conventionally, since the end portion 24a of the first fluid inlet / outlet pipe 24 abuts against a step portion formed as a connection portion in the valve body 2, the first fluid inlet / outlet pipe 24 is positioned. It took time and effort to form the portion with high positional accuracy. In this embodiment, it is only necessary to insert the first fluid inlet / outlet pipe 24 into the valve body 2 to form the through hole 13 reaching the valve chamber 20, and the first fluid inlet / outlet pipe 24 can be positioned by the spacer 15. Thereafter, the first fluid inlet / outlet pipe 24 is brazed to the valve body 2 as described later.

  The aforementioned spacer 15 is press-fitted into the opening end 12 of the valve body 2, and then the center hole of the can receiving plate 23 formed of a ring-shaped metal plate is inserted into the outer peripheral flange 17 of the spacer 15, and the lower surface of the outer peripheral flange 17. Comes into contact with the upper surface of the valve body 2. Then, after the can receiving plate 23 and the spacer 15 are correctly positioned using a predetermined jig or the like, the inner peripheral portion of the can receiving plate 23 and the outer peripheral portion of the outer peripheral flange 17 are temporarily fixed by, for example, caulking using a punch. Is done. Thereafter, the spacer 15, the can receiving plate 23, the valve main body 2, and the first fluid inlet / outlet pipe 24 are brazed as described later. The bottomed cylindrical can 60 is fixed to the valve body 2 by welding the lower end portion thereof to the outer peripheral portion of the can receiving plate 23 as a bowl-shaped portion.

  The valve shaft holder 5 and the rotor 7 are coupled via a support ring 6. The support ring 6 is composed of a brass metal ring inserted when the rotor 7 is molded. The upper protrusion of the valve shaft holder 5 is fitted into the inner peripheral hole portion of the support ring 6, and the protrusion 7 is caulked and fixed so that the rotor 7, the support ring 6 and the valve shaft holder 5 are combined and integrated. . The upper end of the valve shaft 3 passes through a hole formed in the ceiling portion of the valve shaft holder 5, and a push nut 33 is press-fitted and fixed to a tip portion protruding from the ceiling portion. A cylindrical compression coil spring 34 is loosely fitted or elastically attached to the outer periphery of the push nut 33.

  A male screw portion 41 is formed on the outer periphery of the guide bush 4, and a female screw portion 51 is formed on the inner periphery of the valve shaft holder 5. The male screw 41 and the female screw 51 are screwed together so that the rotation of the rotor 7 can be controlled. A screw feed mechanism that converts the shaft 3 to advance and retract is configured.

  One end of the compression coil spring 34 comes into contact with the ceiling portion of the can 60 immediately before the male screw portion 41 and the female screw portion 51 are disengaged, whereby the compression coil spring 34 generates an elastic force. Therefore, when the above-described screwing is released, a force for returning to the screwing is applied again.

  A compression coil spring 32 is disposed between the step provided above the valve shaft 3 and the lower surface of the ceiling of the valve shaft holder 5 in a compressed state. When the valve shaft 3 is raised, The lower surface of the push nut 33 and the upper surface of the ceiling of the valve shaft holder 5 are in contact with each other by the elastic force of the compression coil spring 32.

  On the other hand, when the rotor 7 rotates in a predetermined direction, the valve shaft holder 5 descends and the valve element 31 contacts the valve seat 26, the rotor 7 continues to rotate and the valve shaft holder 5 descends, but the valve shaft 3 After that, the lower surface of the push nut 33 is separated from the upper surface of the ceiling portion of the valve shaft holder 5, and the compression coil spring 32 is further compressed.

  Then, the upper stopper body 8 provided on the valve shaft holder 5 comes into contact with the lower stopper body 9 provided on the guide bush 4, and the rotation of the rotor 7 and the valve shaft holder 5 is stopped. The upper stopper body 8 and the lower stopper body 9 constitute a stopper mechanism that restricts the downward movement of the valve shaft 3.

  And if the rotation direction of the rotor 7 is reversed, the valve shaft 3 will rise.

  The valve seat 26 may be provided with a notch (groove) so that a small amount of fluid flows from the valve seat 26 even when the valve body 31 contacts the valve seat 26, or the valve body 31 may be The upper stopper body 8 may be configured to abut against the lower stopper body 9 before abutting against the inner surface 26.

  A stator (excitation coil device) (not shown) is fitted on the outside of the can 60. Then, by energizing the stator coil stored in the stator, the yoke similarly stored in the stator is excited to rotate the rotor 7 in a predetermined direction, and the screw feed mechanism ( 41, 51), by moving the valve element 31 provided on the valve shaft 3 relative to the valve seat 26, the opening area of the valve seat 26 is changed, and the second fluid inlet / outlet pipe 24 is changed to the second fluid inlet / outlet pipe 24. 25, or the flow rate of the fluid flowing from the second fluid inlet / outlet pipe 25 to the first fluid inlet / outlet pipe 24 is controlled.

  In the motor-operated valve 1 as described above, when the valve main body 2, the spacer 15, and the first fluid inlet / outlet pipe 24 are attached and fixed by brazing, the upper and lower relationships in FIG. That is, the valve body 2 of the valve body 2 is arranged with the valve seat 26 side up and the open end 12 side down, and a brazing is installed so as to surround the adjacent portion of each member from the outer periphery, and brazing in the furnace Thus, wax is poured into the gap between the respective members to fix the members. However, in the conventional brazing operation, there is a case in which the void does not flow into the intended place and a gap is generated. That is, as shown in the enlarged cross-sectional view of the main part of FIG. 5, sufficient brazing does not flow between the spacer 15 and the valve main body 2, and a gap is formed to form a brazing defect 120, In some cases, the spacers were not fixed well and the quality was deteriorated. In order to solve this problem, two embodiments of the shape of the spacer 15 of the embodiment of the present invention will be described in detail below.

  2 is an enlarged cross-sectional view of the main part of the motor-operated valve 1 before brazing according to the first embodiment of the present invention, and FIG. 3 is an enlarged cross-sectional view of the main part of the motor-operated valve 1 after brazing. It is a figure of the part corresponded to 1 A section. 2 and 3, the same reference numerals as those in FIG. 1 denote the same or equivalent parts.

  In the first embodiment of the present invention, as shown in FIG. 2, a recess 15 a is formed below the outer peripheral flange portion 17 on the outer peripheral surface of the cylindrical body 16 of the spacer 15. In addition, a recess 23 a that serves as a wax reservoir is formed in a ring shape on the inner peripheral lower surface of the can receiving plate 23. As described above with reference to FIG. 1, the spacer 15 is pressed into the valve body 2 so that the lower surface of the outer peripheral flange 17 of the spacer 15 contacts the upper surface of the valve body 2, and then the outer peripheral portion of the outer peripheral flange 17 of the spacer 15. The can receiving plate 23 is caulked, and then the first fluid inlet / outlet pipe 24 is inserted into the valve body 2.

  Here, a slight gap is formed between the bottom surface of the recess 23 a (the ceiling surface in FIG. 2) and the upper surface of the valve body 2. The lower surface of the outer peripheral flange 17 is in contact with the upper surface of the valve body 2, and a minute clearance is formed on the contact surface so that the brazing material flows.

  Similarly, minute gaps as shown in the figure are also formed between the outer peripheral flange 17 and the can receiving plate 23 and between the first fluid inlet / outlet pipe 24 and the valve body 2 and the spacer 15.

  The structure assembled in this manner is such that the valve seat 26 side of the valve body 2 faces upward, and the upper surface (in FIG. 1) of the can receiving plate 23 so that the brazing wax 130a surrounds the outer periphery of the valve body 2. Is disposed on the side surface of the valve body 2 so as to surround the first fluid inlet / outlet pipe 24, and in this state, the brazing wax 130b is disposed in the furnace. To do.

  By forming the recess 15 a, a gap having a depth t as the wax reservoir 101 is formed between the valve body 2 and the spacer 15 as shown in FIG. 2. Thus, by forming the concave portion 15a below the outer peripheral flange portion 17 of the outer peripheral surface of the cylindrical main body 16 of the spacer 15, the inner peripheral surface of the valve main body 2 in which the flow of the brazing material has conventionally been insufficient. Also on the outer peripheral surface of the cylindrical main body 16 of the spacer 15, it is generated between the spacer 15 formed by the concave portion 15 a and the valve main body 2 as shown in the enlarged cross-sectional view of the main part of the electric valve after brazing in FIG. 3. The wax 110 can be poured into the wax reservoir 101, and the spacer 15 and the valve body 2 can be firmly fixed by brazing. In this way, by forming the recess 15a on the outer peripheral surface of the cylindrical main body 16, the large-diameter portion 15b of the cylindrical main body 16 and the large-diameter portion 15b on the outer peripheral surface of the cylindrical main body 16 of the spacer 15 are provided below the outer peripheral flange portion 17. The diameter portion 15c can be formed. The small-diameter portion 15 b on the outer periphery of the cylindrical main body 16 functions as the wax pool 101, and the outer peripheral surface of the large-diameter portion 15 c on the outer periphery of the cylindrical main body 16 is in contact with the inner peripheral surface of the valve main body 2. The degree can be secured.

  In order to further improve the low flow at the contact surface (reference numeral 15d in FIG. 3) between the lower surface of the outer peripheral flange portion 17 and the upper surface of the valve body 2, a low flow gap is formed on the corresponding contact surface. Alternatively, a radial groove or a spiral groove that gently spirals in the circumferential direction of the valve body 2 may be formed on the lower surface of the outer peripheral flange portion 17 and / or the upper surface of the valve body 2.

  As described above, when the spacer 15 is brazed to the valve body 2, the outer peripheral surface of the outer peripheral flange portion 17, the can receiving plate 23, and the cylindrical main body 16 is brought into contact with the valve main body 2 at the large diameter portion 15 c of the spacer 15. By brazing the small-diameter portion 15b and the valve body 2 and the bottom portion of the spacer 15 to the valve body 2 and the first fluid inlet / outlet pipe 24, a plurality of relatively long distances sandwiching the large-diameter portion 15c of the contact portion Since the spacer 15 and the valve body 2 can be brazed in a wide area, the fastening strength of the spacer 15 with respect to the valve body 2 can be further increased.

FIG. 4 is an enlarged cross-sectional view of a main part of the motor-operated valve after brazing according to the second embodiment of the present invention, and is a view corresponding to a portion A in FIG. 4, the same reference numerals as those in FIGS. 1 to 3 denote the same or equivalent parts.
The recessed part formed in the outer peripheral surface of the cylindrical main body 16 of the spacer 150 was formed in FIG. 2 in the lower side vicinity of the outer peripheral flange part 17 of the outer peripheral surface of the cylindrical main body 16 of the spacer 150 (code | symbol 15a). However, in the second embodiment, the recess 15aa is formed in the vicinity of the inner peripheral flange 18 near the bottom of the outer peripheral surface of the cylindrical body 16 of the spacer 150. That is, in the second embodiment, the positional relationship (vertical relationship) between the small diameter portion 15b and the large diameter portion 15c on the outer periphery of the cylindrical main body 16 in the first embodiment is reversed. However, the small-diameter portion 15b on the outer periphery of the cylindrical main body 16 functions as a wax reservoir 104, and the outer peripheral surface of the large-diameter portion 15c on the outer periphery of the cylindrical main body 16 is in contact with the inner peripheral surface of the valve main body 2 and coaxial with the valve main body 2. It is the same that the degree can be secured.

  By using the spacer 150 formed in this way, the wax flowing from the periphery of the first fluid inlet / outlet pipe 24 is disposed on the lower side with the large-diameter portion 15c of the spacer 150 in contact with the inner peripheral surface of the valve body 2 interposed therebetween. The spacer 150 flows into the gap 104 formed on the lower side between the spacer 150 and the valve body 2, and a firm joint between the spacer 150 and the valve body 2 is achieved, and the spacer 150 is in contact with the inner peripheral surface of the valve body 2. On the upper side of the large-diameter portion 15c, the flow of the wax 110 into the gap 102 between the outer peripheral surface of the cylindrical main body 16 of the spacer 150 and the outer peripheral portion of the outer peripheral flange portion 17 is improved.

  Thus, brazed portions are formed at a plurality of locations (two locations) that are relatively spaced apart from each other across the large-diameter portion 15c of the spacer 150 that contacts the inner peripheral surface of the valve body 2. In this way, by inserting the wax 110 into the gap 102 and the gap 104 with the large-diameter portion 15c of the spacer 150 in contact with the inner peripheral surface of the valve body 2 interposed therebetween, the location where the spacer 150 and the valve body 2 are fixed is fixed. This can be done at two locations, and the fixing strength can be increased.

  According to the motor-operated valve 1 including the spacers 15 and 150 having the above-described configuration, an amount sufficient for a gap formed by the spacer 15, the valve body 2, and the first fluid inlet / outlet pipe 24 when being fixed by brazing. Therefore, the fixing of each member can be performed reliably and satisfactorily, and the durability of the motor-operated valve can be improved.

  In the above description, the screw feeding mechanism for raising and lowering the valve stem is constituted by a male screw formed on the outer periphery of the guide bush and a female screw formed on the valve shaft holder connected to the rotor. However, the present invention is not limited to this, and it is a matter of course that the valve body may be moved up and down using a screw mechanism in which the relationship between the male screw and the female screw is reversed. That is, a female screw may be formed on the guide bush or a component corresponding thereto, and a male screw screwed to the female screw may be formed on the valve shaft or a component corresponding thereto.

DESCRIPTION OF SYMBOLS 1 Motorized valve 2 Valve body 3 Valve shaft 4 Guide bush 10 Hole 11 Bottom part 12 Open end 13 Through hole 15, 150 Spacer 15a, 15aa Recess 15b Small diameter part 15c Large diameter part 16 Cylindrical main body 17 Outer peripheral flange part 18 Inner peripheral flange part 19 Stopper 20 Valve chamber 24 First fluid inlet / outlet pipe 24a End 25 Second fluid inlet / outlet pipe 26 Valve seat 31 Valve body 101 Low reservoir 110 Low 120 Brazing defect part

Claims (6)

A valve body having a valve chamber and a valve seat into which fluid is introduced and having an open end at an end opposite to the valve seat, a first fluid inlet / outlet pipe communicating with the valve chamber, and the valve seat A second fluid inlet / outlet pipe, a valve shaft disposed to face the valve seat, a guide bush for slidably supporting the valve shaft, and a spacer disposed between the valve body and the guide bush A can receiving plate disposed on the outer periphery of the spacer, a can attached to the outer periphery of the can receiving plate, disposed in the can, and connected to the valve stem and disposed outside the can A motor-driven valve comprising: a rotor that is rotationally driven by the stator; and a screw mechanism that converts the rotational force of the rotor into the forward and backward movement of the valve shaft.
The spacer includes a cylindrical main body to which the guide bush fits, and an outer peripheral flange portion provided at one end of the cylindrical main body and abutting the opening end,
A motor-operated valve characterized in that a concave portion is formed in an outer peripheral portion of the cylindrical main body, and wax is poured into the concave portion to join the valve main body and the spacer. The motor-operated valve according to claim 1, wherein
The motor-operated valve characterized in that the recess is formed in the vicinity of the outer peripheral flange portion. The motor-operated valve according to claim 2,
A motor-operated valve, wherein a groove is formed in at least one of the lower surface and the upper surface so that a low flow gap is formed on a contact surface between the lower surface of the outer peripheral flange portion and the upper surface of the valve body. In the motor operated valve according to any one of claims 1 to 3,
The spacer includes an inner peripheral flange with which an end of the guide bush comes into contact with the other end of the cylindrical body,
The motor-operated valve characterized in that the recess is formed in the vicinity of the inner peripheral flange portion. In the motor operated valve according to any one of claims 1 to 4,
The first fluid inlet / outlet pipe is inserted into a through hole provided in a side surface of the valve body, and a tip thereof is located below the spacer,
When the wax is poured into the recess to join the valve body and the spacer, the first fluid inlet / outlet pipe is also joined to them. The motor-operated valve according to any one of claims 1 to 5,
The motor-operated valve further comprising a stator that is disposed outside the can and drives the rotor.

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