JP6544732B2 - Motorized valve - Google Patents

Description

  The present invention relates to a motor-operated valve used as an expansion valve or the like in a refrigeration cycle, and in particular, a spacer is interposed between a guide bush slidably supporting a valve shaft and a valve body to achieve a large capacity of a valve chamber Relates to a motor-operated valve suitable for

  Conventionally, motor-operated valves incorporated and used in refrigeration cycles such as air conditioners and refrigerators are devices for adjusting the flow rate of fluid such as refrigerant, and usually have a valve body provided with a valve chamber and a valve seat, It has a bottomed cylindrical can fixed to the upper portion of the valve body via a can receiving plate as a bowl-like portion, and a rotor is built in the inside of the can, and the center is outside the can. A stator having an insertion hole is externally fitted to the part, and the rotation of the rotor is converted into vertical movement (advancing and retreating) of the valve shaft by, for example, a screw mechanism.

  The applicant has filed applications such as Patent Document 1 and Patent Document 2 as an example of such a motor-operated valve. In the motor-operated valve disclosed in Patent Document 1, the guide bush is fixed to the valve body via the spacer surrounding the guide bush, thereby achieving a large volume of the valve chamber and effectively reducing the refrigerant passing noise. It is configured to In addition, the motor-operated valve disclosed in Patent Document 2 can start the engine and flow a large amount of refrigerant instantaneously from the time the power is turned on to blow cold air from the air conditioner to reduce the temperature in the vehicle early. It is a motorized valve that

JP, 2011-27148, A JP 2012-87841 A

  In the motor-operated valve of Patent Document 1 or Patent Document 2, the spacer needs to be in contact with the inside of the valve body in order to obtain the coaxiality with the valve body. However, when mounting and fixing each of the valve body, the spacer, and the fluid inflow pipe, a valve is installed so that each contact portion is surrounded from the outer periphery, and the method of fixing by furnace brazing is adopted. The solder must flow between the main body and the spacer so as to be interposed between the body and the spacer, and in order to securely fix the brazing, it is necessary to provide a slight clearance for the solder to flow. That is, when trying to improve the accuracy of the coaxiality to improve the quality of the motor-operated valve, a sufficient low flow does not flow between the spacer and the valve body as shown in the enlarged cross-sectional view of FIG. 5 (described later). However, there is a possibility that a gap is generated to form the brazing defect portion 120, and the valve body and the spacer may not be fixed well.

  The object of the present invention is to solve the above problems, and by flowing a sufficient amount of wax between the spacer and the valve body (and the fluid inlet / outlet pipe) attached thereto, the spacer and the valve body (and the fluid inlet / outlet) It is an object of the present invention to provide a motor-operated valve capable of performing fixation with a tube accurately with good fixation.

In order to solve the above problems, the motor-operated valve according to the present invention has a valve chamber and a valve seat into which fluid is introduced, and a valve main body whose open end is opposite to the valve seat, and the valve chamber A first fluid inlet / outlet pipe communicating with the second fluid inlet / outlet pipe, a second fluid inlet / outlet pipe communicating with the valve seat, a valve shaft disposed to face the valve seat, and a guide bush slidably supporting the valve shaft A spacer disposed between the valve body and the guide bush, a can receiving plate disposed on an outer periphery of the spacer, a can attached to an outer periphery of the can receiving plate, and a spacer disposed in the can And a motor-driven valve including a rotor connected to the valve shaft and rotationally driven by a stator disposed outside the can, and a screw mechanism for converting the rotational force of the rotor into forward and backward movement of the valve shaft. The spacer is the guide A cylindrical main body in which the sleeve is fitted, and an outer peripheral flange portion provided at one end of the cylindrical main body and abutted against the open end, forming a recess in the outer peripheral portion of the cylindrical main body, and pouring a wax into the recess Join the valve body and the spacer at
The spacer includes an inner peripheral flange portion in which an end of the guide bush abuts on the other end of the cylindrical main body,
The recess is formed in the vicinity of the inner peripheral flange portion,
The first fluid inlet / outlet tube is inserted into a through hole provided on the side surface of the valve body, and the tip thereof is located below the spacer.
When the solder is poured into the recess to join the valve body and the spacer, the first fluid inlet / outlet pipe is also joined thereto,
A wax which flows into the recess and joins the valve body and the spacer, and a wax which joins the first fluid inlet / outlet pipe to the valve body are continuous.

  According to the motor-operated valve, it is possible to form a gap between the spacer and the valve body for pouring the solder.

Furthermore, the motor-operated valve according to the present invention is characterized by further comprising a stator which is disposed outside the can and drives the rotor.
A method of manufacturing a motor-operated valve according to the present invention comprises a valve body having a valve chamber and a valve seat into which fluid is introduced, the opposite end portion of the valve seat being open end, and a valve body communicating with the valve chamber A fluid inlet / outlet pipe and a second fluid inlet / outlet pipe communicating with the valve seat, a valve shaft disposed to face the valve seat, a guide bush slidably supporting the valve shaft, the valve body, A spacer disposed between the guide bushes, 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 a member disposed in the can and the valve shaft A motor-driven valve including a rotor connected to the rotor and rotationally driven by a stator disposed outside the can, and a screw mechanism for converting the rotational force of the rotor into forward and backward movement of the valve shaft, the spacer Is the tube in which the guide bush is fitted A main body, and an outer peripheral flange portion provided at one end of the cylindrical main body and abutted against the opening end, forming a recess in the outer peripheral portion of the cylindrical main body, pouring a wax into the recess to form the valve main body and the spacer And the spacer includes an inner peripheral flange portion 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 portion, The first fluid inlet / outlet pipe is inserted into the through hole provided on the side surface of the valve main body, the tip of the first fluid inlet / outlet pipe is located below the spacer, and a wax is poured into the recess to join the valve main body and the spacer At the same time, the first fluid inlet / outlet pipe is also joined to them, and the solder which flows into the recess and joins the valve body and the spacer is continuous, and the solder for joining the first fluid inlet / outlet pipe to the valve body is continuous. Of the motorized valve In the manufacturing method,
A first brazing material is disposed around the outer periphery of the valve body, and a second brazing material is disposed outside the valve body so as to surround the periphery of the first fluid inlet and outlet pipe; It is characterized in that the first brazing material and the second brazing material are heated and melted while holding the valve seat on the upper side with respect to the valve chamber.

  In the motor operated valve according to the present invention, by forming the above-mentioned gap, it is possible to flow a solder into the gap at the time of brazing. Therefore, the spacer and the valve body (and the fluid inlet / outlet pipe) can be fixed well, and the durability of the motor-operated valve can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS It is a longitudinal cross-sectional view which shows one Example of the whole structure of the motor operated valve by which the Example of this 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 motor operated valve, and is a figure of the part corresponded to the A section of FIG.

  Hereinafter, an embodiment of a motor-operated valve according to the present invention will be described based on the attached drawings. FIG. 1 shows an example of the entire 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 of the drawing is expressed as "upper and lower."

  In the motor-operated valve 1 shown in FIG. 1, a cylindrical hole 10 is formed in the valve body 2 to form a valve chamber 20 as a cylindrical space having a constant inner diameter centering on the valve shaft 3 extending in the vertical direction There is. At one end of the valve body 2, that is, the bottom 11 of the hole 10, a valve seat 26 which is opened and closed by the valve body 31 provided at the tip of the valve stem 3 is formed. At the upper end of the valve body 2 (i.e., the other end of the valve body 2), the open end 12 of the hole 10 opens upward. A cylindrical spacer 15 is mounted on the open end 12 side of the hole 10.

  A guide bush 4 slidably supporting and guiding the valve shaft 3 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 the spacer 15 of the shape of a circle. The spacer 15 is provided with the cylindrical main body 16 which the guide bush 4 fits, and is formed as a cylindrical spacer as a whole. An outer peripheral flange portion 17 abutting the end edge of the open end 12 of the hole 10 is provided on the outer peripheral portion near the upper end of the cylindrical main body 16 constituting the spacer 15, and the outer peripheral flange portion 17 is an open end 12 By attaching to 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 to which the lower end portion of the guide bush 4 abuts is provided at an end portion on the bottom portion 11 side of the cylindrical main body 16. The valve stem 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 portion 11 than the inner peripheral flange portion 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. Thus, 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 the valve main body provided with the valve chamber having a large capacity and the spacer 15 prepared accordingly, the valve only needs to use the conventional product as it is without making the guide bush 4 special (large). The motor-operated valve can increase the volume of the chamber 20. As a result, the refrigerant passing noise can be reduced and a large volume of fluid can be handled. The valve chamber 20 in the valve body 2 may be formed not by forging but by cutting if production accuracy is required, but it is also possible to manufacture by press processing, in which case mass production Can be enhanced.

  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 flows in and out, and a second fluid inlet / outlet pipe 25 connected to the valve seat 26. The tip 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, so when connecting the first fluid inlet / outlet pipe 24 to the valve body 2, the first fluid inlet / outlet The end 24 a of the tube 24 abuts against the stopper 19 to position the insertion depth. Conventionally, the end 24a of the first fluid inlet / outlet pipe 24 abuts on a stepped portion formed as a connection portion in the valve main body 2 to position the first fluid inlet / outlet pipe 24. It took time and effort to form the part with high positional accuracy. In this embodiment, the first fluid inlet / outlet pipe 24 may be inserted into the valve main body 2 to form the through hole 13 reaching the valve chamber 20, and the spacer 15 can position the first fluid inlet / outlet pipe 24. Thereafter, the first fluid inlet / outlet pipe 24 is brazed to the valve body 2 as described later.

  The spacer 15 described above is press-fit into the open 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. Contacts 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 caulking using a punch, for example. Be done. Thereafter, the spacer 15, the can receiving plate 23, the valve 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 the support ring 6. The support ring 6 is made of a brass metal ring inserted at the time of forming the rotor 7. The upper protrusion of the valve shaft holder 5 is fitted in the inner peripheral hole of the support ring 6, and the rotor 7, the support ring 6 and the valve shaft holder 5 are combined and integrated by caulking and fixing this protrusion. . The upper end of the valve stem 3 penetrates a hole formed in the ceiling portion of the valve stem 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 resiliently 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, and these male screw 41 and female screw 51 are screwed together. It constitutes a screw feed mechanism that converts into forward and backward movement of the shaft 3.

  One end of the compression coil spring 34 abuts on the ceiling of the can 60 immediately before the male screw portion 41 and the female screw portion 51 are unscrewed, whereby the compression coil spring 34 generates a resilient force. Therefore, when the above-mentioned screwing comes off, the force which returns to screwing is given again.

  A compression coil spring 32 is disposed in a compressed state between the step provided above the valve stem 3 and the lower surface of the ceiling portion of the valve stem holder 5, and when the valve stem 3 is lifted, the compression coil spring 32 is disposed. The elastic force of the compression coil spring 32 brings the lower surface of the push nut 33 into contact with the upper surface of the ceiling of the valve shaft holder 5.

  On the other hand, when the rotor 7 rotates in a predetermined direction and the valve shaft holder 5 descends and the valve body 31 abuts on the valve seat 26, the rotor 7 continues rotating and the valve shaft holder 5 descends. Then, the lower surface of the push nut 33 is separated from the upper surface of the ceiling 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 abuts on 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 so that a small amount of fluid can flow from the valve seat 26 even when the valve body 31 abuts on the valve seat 26, or the valve body 31 is a valve seat The upper stopper body 8 may be configured to abut on the lower stopper body 9 before abutting on the surface 26.

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

  When the valve body 2, the spacer 15, and the first fluid inlet / outlet pipe 24 are attached and brazed and fixed in the motor-operated valve 1 as described above, after assembling them, the vertical relationship in FIG. 1 is reversed. That is, the valve seat 26 side of the valve body 2 is placed on the upper side and the open end 12 side is on the lower side, and a brazing is installed so as to surround the adjacent part of each member from the outer periphery. The wax is poured into the gap between the respective members to fix the members. However, in the conventional brazing operation, there has been a case where a void does not flow into the intended place and a void is generated. That is, as shown in the enlarged cross-sectional view of the main part of FIG. 5, a sufficient amount of solder does not flow between the spacer 15 and the valve main body 2 and a gap is generated to form the brazing defective portion 120. In some cases, the spacer may not be fixed well and the quality may be reduced. Two embodiments of the shape of the spacer 15 according to the embodiment of the present invention for solving the problem will be described in detail below.

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

  In the first embodiment of the present invention, as shown in FIG. 2, a recess 15 a is formed on the lower side of the outer peripheral flange portion 17 in the outer peripheral surface of the cylindrical main body 16 of the spacer 15. Further, a recessed portion 23 a which is a solder pool is formed in a ring shape on the lower surface on the inner peripheral side of the can receiving plate 23. Then, as described above with reference to FIG. 1, after the spacer 15 is press-fit into the valve body 2 so that the lower surface of the outer peripheral flange 17 of the spacer 15 abuts on the upper surface of the valve main body 2, the outer peripheral portion of the outer peripheral flange 17 of the spacer 15 Then, the first fluid inlet and outlet pipe 24 is inserted into the valve body 2.

  Here, a slight gap is formed between the bottom surface (the ceiling surface in FIG. 2) of the recess 23 a and the top 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, but a minute clearance to the extent that the brazing material flows is also formed on this contact surface.

  Similarly, a minute gap as illustrated is 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.

  With the structure assembled in this manner, the valve seat 26 side of the valve body 2 is on top, and the brazing solder 130 a is placed on the upper surface of the can receiving plate 23 so as to surround the outer periphery of the valve body 2 (FIG. Is disposed on the lower surface of the can receiving plate 23, and a brazing solder 130b is disposed on the side surface of the valve body 2 so as to surround the first fluid inlet / outlet pipe 24. Do it.

  By forming the recess 15 a, as shown in FIG. 2, a gap with a depth t as the solder reservoir 101 is formed between the valve body 2 and the spacer 15. Thus, by forming the recess 15a under 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 been insufficient conventionally Also on the outer peripheral surface of the cylindrical main body 16 of the spacer 15, as shown in the enlarged cross-sectional view of the main part of the motor operated valve after brazing, it occurs between the spacer 15 formed by the recess 15a and the valve main body 2 The solder 110 can be poured into the solder reservoir 101, and the spacer 15 and the valve body 2 can be firmly fixed by brazing. As described above, by forming the recess 15 a in the outer peripheral surface of the cylindrical main body 16, the small diameter portion 15 b of the cylindrical main body 16 and the large diameter are formed below the outer peripheral flange portion 17 of the outer peripheral surface of the cylindrical main body 16 of the spacer 15. The diameter portion 15c can be formed. The small diameter portion 15b on the outer periphery of the cylindrical main body 16 functions as a solder reservoir 101, and the outer peripheral surface of the large diameter portion 15c on the outer periphery of the cylindrical main body 16 abuts the inner peripheral surface of the valve main body 2 to be coaxial with the valve main body 2 The degree can be secured.

  In addition, in the contact surface (symbol 15 d of FIG. 3) of the lower surface of the outer peripheral flange portion 17 and the upper surface of the valve main body 2, a gap for low flow is formed in the contact surface to further improve the low flow. A radial groove may be formed on the lower surface of the outer peripheral flange portion 17 and / or the upper surface of the valve body 2, or a spiral groove that spirals gently in the circumferential direction of the valve body 2 may be formed.

  As described above, when the spacer 15 is brazed to the valve body 2, the large diameter portion 15 c of the spacer 15 is brought into contact with the valve body 2, and the outer peripheral flange portion 17 and the can receiving plate 23, the outer peripheral surface of the cylindrical main body 16 By brazing the small diameter portion 15b and the valve body 2, and the bottom portion of the spacer 15, the valve body 2 and the first fluid inlet / outlet pipe 24 to each other, 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 to the valve body 2 can be further enhanced.

FIG. 4 is an enlarged sectional view of an essential part of the motor-operated valve after brazing according to a second embodiment of the present invention, and is a view corresponding to the part A of FIG. In FIG. 4, the same reference numerals as in FIGS. 1 to 3 indicate 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 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 in FIG. However, in the second embodiment, the recess 15 aa is formed in the vicinity of the inner peripheral flange portion 18 near the bottom of the outer peripheral surface of the cylindrical main 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 solder reservoir 104, and the outer peripheral surface of the large diameter portion 15c on the outer periphery of the cylindrical main body 16 abuts on the inner peripheral surface of the valve main body 2 The point is that it is possible to secure the degree.

  By using the spacer 150 formed in this way, the low flowed in from the periphery of the first fluid inlet / outlet pipe 24 is disposed on the lower side with the large diameter portion 15 c of the spacer 150 in contact with the inner peripheral surface of the valve main body 2 The spacer 150 flows into the gap 104 formed below between the spacer 150 and the valve body 2 to achieve a strong joint between the spacer 150 and the valve body 2, and the spacer 150 abutting on the inner circumferential surface of the valve body 2. The flow of the solder 110 into the gap 102 between the outer peripheral portion of the outer peripheral surface of the cylindrical main body 16 of the spacer 150 and the outer peripheral portion of the spacer 150 is improved on the upper side of the large diameter portion 15c.

  As a result, brazed parts are formed at a plurality of places (two places) where the distance between the upper and lower parts is relatively large, with the large diameter part 15c of the spacer 150 in contact with the inner peripheral surface of the valve body 2. Thus, by inserting the solder 110 into the gap 102 and the gap 104 with the large diameter portion 15 c of the spacer 150 in contact with the inner peripheral surface of the valve body 2, the location where the spacer 150 and the valve body 2 are fixed It can be done in two places, and the fixing strength can be increased.

  According to the motor-operated valve 1 having the spacers 15 and 150 configured as described above, an amount sufficient for the gap formed by the spacer 15 and the valve body 2 and the first fluid inlet / outlet pipe 24 when fixed by brazing. Since it is possible to pour the wax, fixing of each member can be surely performed well, and the durability of the motor-operated valve can be improved.

  In the above description, the screw feed mechanism for raising and lowering the valve rod is constituted by an external thread formed on the outer periphery of the guide bush and an internal thread formed on the valve shaft holder connected to the rotor. However, the present invention is not limited to this, and it goes without saying that the valve body may be raised and lowered using a screw mechanism in which the relationship between the male screw and the female screw is reversed. That is, an internal thread may be formed on the guide bush or a part corresponding thereto, and an external thread to be screwed to the internal thread may be formed on the valve shaft or an equivalent part.

DESCRIPTION OF SYMBOLS 1 motor-operated valve 2 valve main body 3 valve shaft 4 guide bush 10 hole 11 bottom part 12 opening end 13 through hole 15, 150 spacer 15a, 15aa recessed part 15b small diameter part 15c large diameter part 16 cylindrical main body 17 outer peripheral flange 18 inner peripheral flange Reference Signs List 19 stopper 20 valve chamber 24 first fluid inlet / outlet pipe 24 a end 25 second fluid inlet / outlet pipe 26 valve seat 31 valve body 101 solder pool 110 solder 120 brazed defective portion

Claims (4)

A valve body having a valve chamber and a valve seat into which fluid is introduced, the opposite end portion of the valve seat being in an open end, and a first fluid inlet / outlet pipe communicating with the valve chamber and the valve seat A second fluid inlet / outlet pipe, a valve stem disposed to face the valve seat, a guide bush slidably supporting the valve stem, a spacer disposed between the valve body and the guide bush And 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 a portion disposed in the can and connected to the valve shaft and disposed on the outside of the can In a motor-operated valve, comprising: a rotor rotationally driven by the fixed stator; and a screw mechanism for converting the rotational force of the rotor into forward and backward movement of the valve shaft,
The spacer includes a cylindrical main body in which the guide bush is fitted, and an outer peripheral flange portion provided at one end of the cylindrical main body and abutting against the opening end.
A recess is formed in the outer peripheral portion of the cylindrical main body, and a wax is poured into the recess to join the valve main body and the spacer,
The spacer includes an inner peripheral flange portion in which an end of the guide bush abuts on the other end of the cylindrical main body,
The recess is formed in the vicinity of the inner peripheral flange portion,
The first fluid inlet / outlet tube is inserted into a through hole provided on the side surface of the valve body, and the tip thereof is located below the spacer.
When the solder is poured into the recess to join the valve body and the spacer, the first fluid inlet / outlet pipe is also joined thereto,
A motor-operated valve characterized in that a solder which flows into the recess and joins the valve body and the spacer is continuous with a solder which joins the first fluid inlet / outlet pipe to the valve body. In the motor operated valve according to claim 1,
A motor-operated valve, further comprising a stator disposed outside the can and driving the rotor. In the motor operated valve according to claim 1 or 2,
Between the first brazing material and the second brazing material disposed on the outer periphery of the valve body, the press-fit portion of the spacer in contact with the inner periphery of the valve body is located in the axial direction of the valve body. Motorized valve characterized by. A valve body having a valve chamber and a valve seat into which fluid is introduced, the opposite end portion of the valve seat being in an open end, and a first fluid inlet / outlet pipe communicating with the valve chamber and the valve seat A second fluid inlet / outlet pipe, a valve stem disposed to face the valve seat, a guide bush slidably supporting the valve stem, a spacer disposed between the valve body and the guide bush And 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 a portion disposed in the can and connected to the valve shaft and disposed on the outside of the can Motor-operated valve comprising a rotor rotationally driven by the stator and a screw mechanism for converting the rotational force of the rotor to the advancing and retracting movement of the valve shaft, wherein the spacer is a cylinder in which the guide bush is fitted Body and one end of the cylindrical body And an outer peripheral flange portion which abuts on the open end, and a concave portion is formed on an outer peripheral portion of the cylindrical main body, and a wax is poured into the concave portion to join the valve main body and the spacer; The other end of the guide body is provided with an inner peripheral flange portion with which the end of the guide bush abuts, the recess is formed in the vicinity of the inner peripheral flange portion, and the first fluid inlet / outlet pipe is formed of the valve body The first fluid inlet / outlet pipe is also inserted into a through hole provided on the side surface, the tip of which is located below the spacer, and when the solder is poured into the recess to join the valve body and the spacer A method of manufacturing a motor-operated valve, in which a solder which is joined to the recess, flows into the recess to join the valve body and the spacer, and a solder which joins the first fluid inlet / outlet pipe to the valve body is continuous;
A first brazing material is disposed around the outer periphery of the valve body, and a second brazing material is disposed outside the valve body so as to surround the periphery of the first fluid inlet and outlet pipe; A method of manufacturing a motor-operated valve, comprising heating and melting the first brazing material and the second brazing material while holding the valve seat at an upper position relative to the valve chamber.

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