JP7263196B2 - Valve device and refrigeration cycle device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve device used in a refrigeration cycle device or the like to control the flow rate of a refrigerant or the like, and a refrigeration cycle device provided with such a valve device.

2. Description of the Related Art Conventionally, a valve device is known that includes a valve body having a valve chamber and a valve port provided therein, a valve body that can move back and forth with respect to the valve port, and a cover member attached to the valve body (for example, , see Patent Document 1). In such a valve device, the lid member is fixed to the valve body by brazing in order to obtain airtightness between the valve body and the lid member. When fixing by brazing, first, the cover member is combined with the valve body by caulking or the like. After that, brazing is performed by setting a ring-shaped brazing filler metal on the boundary portion in a state in which one member (in many cases, the cover member) is set up so as to face downward. Brazing is performed by infiltrating molten brazing material from this boundary into between the lid member and the valve body.

JP 2009-052742 A

Here, when the brazing is fixed as described above, before the molten brazing material sufficiently permeates between the lid member and the valve body from the boundary portion, which is the brazing portion, a part of the brazing material is , it may hang down on the side surface of a member such as a lid member located below the boundary. At this time, if too much brazing material drips and flows out, airtightness leakage may occur at the brazed portion between the valve body and the lid member. Also, if the outflowing brazing material adheres to, for example, a portion to be welded in a post-process, it may lead to poor welding and airtightness leakage.

Therefore, the present invention focuses on the above problems, and provides a valve device capable of suppressing the outflow of the brazing material from the brazed portion and fixing the lid member to the valve main body by brazing, and such a valve device. It is an object of the present invention to provide a refrigeration cycle device equipped with.

In order to solve the above-described problems, the valve device of the present invention includes a valve chamber that accommodates fluid flowing in and out of a first port, and a valve that allows the fluid to flow in and out between the interior of the valve chamber and a second port. a valve body having a port therein;
a valve body that enters the valve chamber from the outside of the valve body and is provided so as to be able to move forward and backward with respect to the valve opening, and that changes the opening degree of the valve opening;
It is formed in a bottomed cylindrical shape having a bottom wall provided with a passage port for the valve body, and the end is placed in a state in which the outer surface of the bottom wall is directed toward the end portion of the valve body where the valve body entrance port is open. a lid member in which the bottom wall is brazed and fixed around the entrance in the part,
A chamfered portion chamfered over the entire outer periphery of the bottom wall is formed at a corner portion between the outer peripheral surface of the lid member and the outer surface of the bottom wall. It is formed so as to be located inside the outer circumference,
At least one groove is formed in the chamfered portion along the outer periphery of the bottom wall.

The chamfering referred to here includes both C chamfering for forming an inclined surface at the corner portion and R chamfering for forming a curved surface by rounding the corner portion.

According to the valve device of the present invention, the chamfered portion is formed at the corner portion of the lid member, and when the lid member is combined with the valve body for brazing fixation, the chamfered portion is located at the boundary between the two. . Here, when the lid member is fixed to the valve body by brazing, the lid member may be arranged on the lower side of the valve body and brazed. Then, the melted brazing material permeates from the boundary portion into the brazing portion between the lid member and the valve body, and the brazing is fixed. At this time, the brazing portion between the lid member and the valve body is The brazing material melts before it is sufficiently heated, and a part of the brazing material tends to hang from the boundary portion to the side surface of the lid member arranged below as described above. Even if a part of the brazing material tries to hang down in this way, the brazing material is accumulated in the groove formed in the chamfered portion located at the boundary, so that the brazing material tends to cross over the groove and further hang down on the side surface of the cover member. The movement of the brazing material is stopped. As a result, most of the brazing filler metal stays at the boundary portion, and the outflow of the brazing filler metal from the brazing portion to the side surface of the member is suppressed. As a result, it is possible to suppress the occurrence of airtightness leakage due to shortage of brazing material, and the occurrence of airtightness leakage due to poor welding caused by adherence of outflowing brazing material to welded points. As described above, according to the valve device of the present invention, the lid member can be brazed and fixed to the valve main body while suppressing the outflow of the brazing material from the brazed portion.

Here, the valve device of the present invention may be an electric valve provided with a driving portion that drives the valve element to move back and forth with respect to the valve opening by means of a motor.

Further, in the valve device of the present invention, at least a part of the inner surface of the groove is further away from the valve body in the axial direction than the outer edge of the pair of edges of the groove located on the outer peripheral surface side of the lid member. It is preferred that

According to this configuration, at least a portion of the inner surface of the groove is further away from the valve body in the axial direction than the outer edge of the groove for storing the brazing material. As a result, for example, when brazing is fixed with the lid member facing downward, the brazing material accumulated in the groove can be well retained in the groove, thereby further preventing the brazing material from flowing out from the brazing portion. Brazing can be fixed by holding down.

Further, in this configuration, the outer edge of the groove is the tip edge of a protruding wall that protrudes in a rib shape from the bottom of the groove, and at least a part of the inner surface of the groove is closer to the axis than the tip edge. It is further preferred that the direction is away from the valve body.

According to this configuration, the brazing filler metal can be effectively held in the groove by the tip edge of the rib-shaped protruding wall forming the outer edge of the groove.

Further, in the valve device of the present invention, the groove may be an arcuate groove having an arcuate cross section perpendicular to the circumferential direction of the outer periphery of the bottom wall, or a V-shaped groove having an orthogonal cross section having a V shape, or A rectangular groove having a rectangular orthogonal cross section may be used.

According to this configuration, grooves having shapes such as arcuate grooves, V-shaped grooves, rectangular grooves, and the like, which are easy to process, can be provided.

Moreover, in the valve device of the present invention, it is preferable that the outer diameter of the lid member is larger than the outer diameter of the valve main body.

According to this configuration, since the outer diameter of the lid member is larger than the outer diameter of the valve body, for example, when brazing is performed with the lid member facing downward, the brazing material can be easily fastened to the boundary between the two. Brazing can be fixed by further suppressing the outflow of the brazing material from the attachment portion.

Moreover, in order to solve the above-mentioned problems, a refrigeration cycle apparatus of the present invention is characterized by having the above-described valve device of the present invention in a refrigerant circuit.

As described above, the refrigeration cycle apparatus of the present invention includes a valve device capable of brazing and fixing the lid member to the valve main body while suppressing the outflow of the brazing material from the brazing portion.

ADVANTAGE OF THE INVENTION According to the present invention, a valve device capable of suppressing outflow of a brazing material from a brazed portion and fixing a cover member to a valve body by brazing and having stable airtightness, and such a valve device. A refrigeration cycle device can be provided.

It is a typical sectional view showing the internal structure of the valve device concerning one embodiment of the present invention. 1 is a schematic diagram showing a device having the valve device shown in FIG. 1 in a refrigerant circuit as a refrigeration cycle device according to one embodiment of the present invention. FIG. FIG. 2 is a diagram showing how the bottom wall of the lid member is fixed to the end of the valve body by brazing in the valve device shown in FIG. 1 ; FIG. 10 is a diagram showing how melted brazing material is collected in grooves formed in the R portion of the lid member during brazing and fixing, in comparison with a comparative example in which no grooves are provided. FIG. 10 is a diagram showing how the groove formed in the R portion of the lid member suppresses an increase in the outer diameter of the lid member, in comparison with a comparative example in which the groove is formed on the flat outer surface of the bottom wall. 6A and 6B are diagrams showing first and second modifications to the embodiment shown in FIGS. 1 to 5; FIG. FIG. 6 shows a third modification to the embodiment shown in FIGS. 1 to 5; FIG. FIG. 6 shows a fourth modification to the embodiment shown in FIGS. 1 to 5; FIG.

A valve device and a refrigeration cycle device according to an embodiment of the present invention will be described below. First, one embodiment of the valve device will be described.

FIG. 1 is a schematic cross-sectional view showing the internal structure of a valve device according to one embodiment of the present invention.

A valve device 1 shown in FIG. 1 is used, for example, in a refrigeration cycle device, and is used as a so-called expansion valve that changes the flow rate of refrigerant as a fluid. The valve device 1 is a motor-operated valve provided with a stepping motor 70, which will be described later, as a drive unit for driving the valve body 30 forward and backward with respect to the valve port 12. As shown in FIG.

The valve device 1 has a cup-shaped metal valve body 10, as shown in FIG. The valve body 10 includes a valve chamber 11, a valve opening 12 provided on a valve seat 22 facing the valve body 30 in the valve chamber 11, and a first port 14 connected to a horizontal joint 13 and communicating directly with the valve chamber 11. , and a second port 16 connected to the lower joint 15 and communicating with the valve chamber 11 via the valve port 12 .

That is, the valve main body 10 has a flow path for the above-described refrigerant flowing through the first port 14 , the valve chamber 11 , the valve opening 12 and the second port 16 . Refrigerant flowing in and out of the first port 14 is accommodated in the valve chamber 11 . Further, the valve port 12 allows the refrigerant to flow in and out between the valve chamber 11 and the second port 16 described above. In the illustrated example, the valve device 1 can flow the refrigerant as a liquid fluid in either direction from the first port 14 to the second port 16 or from the second port 16 to the first port 14 . Also, the inner surfaces of the first port 14 and the lateral joint 13 are arranged substantially flush with the inner surface of the valve chamber 11 . 1 of the valve main body 10 has an inlet 112 for allowing the valve body 30 to enter the valve chamber 11, and a valve guide member 34 is attached to the inner side thereof.

The valve port 12 is formed so as to open substantially in the center of the wall portion that partitions the second port 16 side of the valve seat 22 , that is, the valve chamber 11 . The valve port 12 allows coolant as a fluid to flow inside.

A cover member 28 formed in a cylindrical shape with a bottom and having a passage port 282 for the valve body 30 provided in a bottom wall 281 is coaxially attached to the upper portion of the valve body 10 in FIG. A fixed support member 18 is fixed to the upper portion of the cover member 28 in FIG. A guide hole 19 is formed in the fixed support member 18 . The guide hole 19 is positioned concentrically with the valve port 12, and a cylindrical valve holder 20 is fitted in the guide hole 19 so as to be slidable in the axial direction (vertical direction), that is, in the valve opening/closing direction. This allows the valve holder 20 to move axially within the fixed support member 18 .

The valve holder 20 has an annular lower lip member 21 attached to the inner circumference of the lower end in FIG. 1, and an annular upper lip piece 23 is integrally formed on the inner circumference of the upper end in FIG. . The upper surface of the lower lip member 21 in FIG. 1 forms an upward stopper surface portion 25 formed in an annular stepped shape. A pressure equalizing hole 110 is formed in the valve holder 20 .

A valve body 30 made of metal or synthetic resin is attached to the lower lip member 21 attached to the valve holder 20 so as to be displaceable in the axial direction. The valve body 30 is formed in the shape of a cylindrical needle, and is loosely fitted in an opening 26 formed inside the lower lip member 21 . It is passed through with a gap. 1 is engaged with the upper surface of the lower lip member 21, the valve body 30 is rotatably suspended from the valve holder 20 and supported. It is

The cover member 28 is arranged with the outer surface of the bottom wall 281 facing the end portion 111 of the valve body 10 where the inlet 112 of the valve body 30 opens. Then, the bottom wall 281 is formed around the entrance 112 in the end portion 111, along the outer periphery of at least one of the outer periphery of the bottom wall 281 and the center side of the outer surface 281a of the bottom wall 281 and the inner region than the outer periphery. It is fixed by brazing as will be described later. This brazing fixation may be such that only one of the outer periphery and the inner region of the bottom wall 281 is brazed and fixed to the end portion 111 of the valve body 10, or the outer periphery and the inner region of the bottom wall 281 are brazed. may be fixed to the end portion 111 of the valve body 10 by brazing.

The valve body 30 is passed through the valve guide member 34 from the outside of the valve main body 10 to enter the valve chamber 11, and is supported by the valve guide member 34 so as to be movable along its axis. The valve body 30 is located on the lower side in FIG. 1 and forms a flow rate adjusting portion 33 having a conical tip facing the valve port 12. The flow rate adjusting portion 33 is a lower lip member. It protrudes toward the valve port 12 from an opening 26 inside the valve 21 . In this way, the valve element 30 is movable in the axial direction, so that the valve body 30 is provided so as to move forward and backward in the valve port 12, and the flow rate adjusting portion 33 is formed to taper as it approaches the valve port 12. It is

The valve element 30 performs quantitative flow control of the refrigerant according to the degree of entry (position in the axial direction) of the flow rate adjusting portion 33 into the valve port 12 , and the flow rate adjusting portion 33 adjusts the valve seat 22 around the valve port 12 . The valve port 12 is closed (occluded) in a fully closed state.

In the valve holder 20, a lower end portion 74 of a male screw shaft 73 forming a rotor shaft of a stepping motor 70 (to be described later) penetrates the opening 27 inside the upper lip piece 23 of the valve holder 20 in a loose fit state. This loose fitting state means that the valve holder 20 and the male threaded shaft 73 can be relatively displaced in the radial direction.

A retainer member 35 is arranged between the lower end portion 74 of the male threaded shaft 73 , that is, between the male threaded shaft 73 and the valve body 30 . The retainer member 35 is formed in a columnar shape and, of course, is accommodated in the valve holder 20. At its upper end in FIG. It is integrally formed so as to protrude outward. The suspension engaging portion 75 is coated with highly lubricious plastic such as fluororesin on the upper surface side in FIG. It is rotatably engaged with piece 23 . By this engagement, the valve holder 20 is rotatably suspended from the male screw shaft 73 and supported.

Between the hanging engaging portion 75 provided on the retainer member 35 and the annular stepped portion 32 of the valve body 30, a compression coil spring 36 passing the retainer member 35 inside is applied with a predetermined preload. installed in good condition.

A male threaded portion 37 is formed on the outer peripheral surface of the male threaded shaft 73 . The male threaded portion 37 is threadedly engaged with a female threaded portion 38 formed on the fixed support member 18 . Due to this threaded engagement, the male threaded shaft 73 moves in the axial direction, that is, in the valve opening/closing direction as it rotates. A feed screw mechanism is formed by screw engagement between the male threaded portion 37 and the female threaded portion 38, and the feed screw mechanism converts the rotational motion of the male threaded shaft 73 into linear motion in the valve opening/closing direction.

A can-shaped rotor case 71 of a stepping motor 70 is airtightly fixed to the lid member 28 by welding on the upper portion of the lid member 28 in FIG. A rotor 72 is rotatably provided in the rotor case 71, the outer peripheral surface portion 72A of which is multi-polarized. The rotor 72 is fixedly connected to the central portion in FIG. 1 of the male screw shaft 73 which also serves as the rotor shaft.

A stator coil unit 77 is inserted and attached to the outside of the rotor case 71 . Although not shown in detail, the stator coil unit 77 has a well-known hermetic mold structure having magnetic pole teeth, windings, and electrical wiring inside for a stepping motor.

Inside the rotor case 71 are a guide support cylinder 78 suspended from the ceiling of the rotor case 71 , a spiral guide wire body 79 attached to the outer periphery of the guide support cylinder 78 , and A formed fixed stopper portion 80 is provided. A movable stopper member 81 is screwed to the spiral guide wire body 79 , and the rotor 72 is provided with a protrusion 82 that engages with the movable stopper member 81 and kicks it around. The structure inside the rotor case 71 constitutes a stopper for opening or closing the valve. The guide support tube 78 rotatably supports the male screw shaft 73 with the upper end portion 76 of the male screw shaft 73 shown in FIG.

The stepping motor 70 rotates a male threaded shaft 73 by a rotor 72 , and linearly moves the valve body 30 together with the valve holder 20 in the valve opening/closing direction by moving the male threaded shaft 73 in the axial direction along with the rotation. As a result, the axial position (linear movement position in the valve opening/closing direction) of the flow rate adjusting portion 33 of the valve body 30 with respect to the valve port 12 changes, and the effective opening area of the valve port 12 increases or decreases according to the axial direction position. , quantitative flow control of the refrigerant is performed. In this manner, the valve body 30 moves forward and backward with respect to the valve port 12 to change the flow rate of the refrigerant, that is, change the opening degree of the valve device 1 .

1 in the valve opening/closing direction of the valve body 30, the effective opening area of the valve port 12 gradually decreases, and accordingly the flow rate of the fluid flowing through the valve port 12 gradually decreases. When the valve body 30 moves downward by a predetermined amount in the valve opening/closing direction, the flow rate adjusting portion 33 of the valve body 30 comes into contact with the valve seat 22, thereby closing the valve port 12 to a fully closed state.

The valve device 1 configured as described above is provided in a refrigerant circuit of a refrigeration cycle device and functions as an expansion valve of the refrigeration cycle device. An embodiment of this refrigeration cycle apparatus will be described below.

FIG. 2 is a schematic diagram showing a device having the valve device shown in FIG. 1 in a refrigerant circuit as a refrigeration cycle device according to one embodiment of the present invention.

As shown in FIG. 2, the refrigeration cycle device 5 includes a compressor 501, a condenser (outdoor heat exchanger) 502, the aforementioned valve device 1 used as an expansion valve, and an evaporator (indoor heat exchanger). 504 and refrigerant passages 505 to 508 connecting them in a loop.

This refrigerating cycle device 5 is used in air conditioners (cooling), freezers/refrigerators, and the like. The refrigerating cycle device to which the valve device 1 described above is applied is not limited to the basic refrigerating cycle device as shown in FIG. That is, by incorporating a four-way valve, the direction of refrigerant flow in the refrigerant circuit can be reversed in an air conditioner for cooling and heating, and two heat exchangers are connected in series to the indoor unit, and an additional heat exchanger is installed between the two heat exchangers. The present invention can also be applied to an air conditioner or the like that has an expansion valve and is capable of cooling, heating, and dehumidifying. Thus, the refrigerating cycle device 5 can be applied to any type of refrigerating cycle device. Further, the refrigeration cycle device to which the valve device 1 is applied can also be applied to an air conditioner capable of cooling and heating, in which a plurality of indoor units are connected in parallel to one outdoor unit and each indoor unit has an expansion valve. be.

Here, in the valve device 1 shown in FIG. 1, the bottom wall 281 of the lid member 28 is brazed and fixed to the end portion 111 of the valve body 10 as described above. This brazing fixation is performed as described below.

3 is a view showing how the bottom wall of the cover member is brazed to the end of the valve body in the valve device shown in FIG. 1. FIG.

When fixing by brazing, the lid member 28 is first combined with the valve body 10 by caulking or the like. After that, as shown in FIG. 3, the brazing material 6 is set in a ring shape at the boundary between the cover member 28 and the cover member 28, and brazing is performed. Brazing is performed by infiltrating the melted brazing material 6 from this boundary into the brazing portion between the lid member 28 and the valve body 10 .

At this time, in the present embodiment, the corner portion between the outer peripheral surface 283 of the lid member 28 and the outer surface 281a of the bottom wall 281 is rounded over the entire outer periphery of the bottom wall 281 to form an R-shaped cross section. A rounded R portion 284 is formed as a chamfer. The R portion 284 is formed such that a chamfering start position 284 a on the side of the bottom wall 281 , which hits the outer periphery of the bottom wall 281 , is located inside the outer periphery 10 a of the valve body 10 . When the lid member 28 is fixed to the valve body 10 by brazing, the brazing material 6 in the melted state is partially stored in the approximate center of the R portion 284 when the brazing material 6 is about to drip. A single groove 285 is formed along the outer periphery of the bottom wall 28 to stop the movement of the brazing material 6 .

This groove 285 is an arcuate groove having an arcuate cross-section perpendicular to the circumferential direction of the outer circumference, and when the cover member 28 and the valve body 10 are vertically placed as shown in FIG. It is formed so as to be slightly upward. Due to such an upward formation, a part of the inner surface of the groove 285 is positioned in the axial direction (vertical direction in the figure) from the outer edge 285a of the pair of edges of the groove 285 located on the outer peripheral surface side of the lid member 28, and the valve body away from 10. The outer edge 285a serves as a lower edge positioned on the lower side when the lid member 28 is brazed and fixed below the valve body 10 . A portion of the inner surface of the groove 285 that is farther from the valve body 10 than the outer edge 285a becomes the lowermost portion 285b on the inner surface of the groove 285 during this brazing fixation.

Further, in this embodiment, the outer diameter φ11 of the lid member 28 is larger than the outer diameter φ12 of the valve body 10 .

According to the valve device 1 and the refrigerating cycle device 5 of the present embodiment described above, the rounded portion 284 is formed at the corner portion of the lid member 28 fixed to the valve main body 10 by brazing in the valve device 1 . When the cover member 28 is combined with the valve body 10 for fixing by brazing, the R portion 284 is positioned at the boundary between the two. Then, when fixing by brazing, the brazing material 6 is melted before the brazing portion between the lid member 28 and the valve body 10 is sufficiently heated, and a portion of the brazing material 6 melts downward from the boundary portion as described above. Even if it tries to hang down on the side surface of the lid member 28 arranged on the side, it will be caught in the groove 285 formed in the R portion 284 located at the boundary and the movement will be stopped.

FIG. 4 shows how, when a part of the melted brazing material is about to drip during brazing fixation, it is accumulated in the groove formed in the R portion of the cover member and the movement is stopped. FIG. 10 is a diagram showing a comparison with a comparative example that is not tested. In addition, in FIG. 4, in the comparative example, the same reference numerals as in the present embodiment are assigned to the same components as in the present embodiment.

First, the comparative example having the lid member 68 without the groove 285 will be described. , part of the brazing filler metal 6 may drip and flow out from the boundary portion to the side surface of the lid member 68 . At this time, if too much brazing material 6 flows out, an airtight leak may occur between the lid member 68 and the valve body 10 . In addition, there is a welded portion 686 with the rotor case 71 shown in FIG. If the outflowing brazing filler metal 6 adheres to such a welded portion 686, it may lead to poor welding during welding in a subsequent process, which may cause an airtight leak.

In contrast to this comparative example, in the present embodiment, even if part of the molten brazing filler metal 6 is about to drip from the boundary, it is retained in the groove 285 formed in the R portion 284 of the lid member 28 and stopped. Therefore, most of the brazing material 6 remains at the boundary. As a result, it is possible to suppress the occurrence of an airtight leak due to insufficient brazing material 6 and the occurrence of poor welding due to adherence of outflowing brazing material 6 to welded portion 286 with rotor case 71 . Thus, according to the present embodiment, the lid member 28 can be brazed and fixed to the valve body 10 while suppressing the outflow of the brazing material 6 from the brazed portion.

Further, in the present embodiment, the groove 285 is formed in the R portion 284 of the lid member 28, so that the outer diameter of the lid member 28 can be suppressed from increasing due to the formation of the groove 285. FIG.

FIG. 5 shows how the groove formed in the R portion of the lid member suppresses an increase in the outer diameter of the lid member, while comparing it with a comparative example in which the groove is formed on the flat outer surface of the bottom wall. It is a diagram. In addition, in FIG. 5 as well, in the comparative example, the same reference numerals as in the present embodiment are assigned to the same components as in the present embodiment.

First, a comparative example in which the groove 885 is formed in the flat outer surface 881a of the bottom wall 881 of the lid member 88 will be described. In this comparative example, it is necessary to form the groove 885 so as to deviate from the valve body 10 in the radially outer direction and be exposed in order to allow a portion of the brazing material 6 to accumulate during brazing fixation. For this reason, in order to secure the formation location of the groove 885, the outer diameter d81 of the lid member 88 needs to be enlarged to be larger than the valve main body 10. As shown in FIG.

Further, when the groove 885 is formed by cutting or pressing, there are cases where a protrusion 885c such as a burr due to cutting or a protrusion due to pressing is generated on the edge of the groove 885 . In the comparative example shown in FIG. 5, a gap d82 opens between the valve body 10 and the lid member 88, resulting in defective brazing or the like, unless a step of removing the protrusion 885c is provided prior to fixing by brazing. There is fear.

In contrast to the above comparative example, the groove 285 is formed in the R portion 284 of the lid member 28 in this embodiment. The R portion 284 is a portion away from the end portion 111 of the valve body 10 , unlike the flat end portion of the bottom wall 281 facing the end portion 111 of the valve body 10 . Therefore, even if the outer diameter d11 of the lid member 28 is not widened so much with respect to the valve body 10, the groove 285 can be formed so as to be exposed so that the brazing material 6 is accumulated. That is, according to the present embodiment, the groove 285 is formed in the R portion 284 of the lid member 28, so that an increase in the outer diameter d11 of the lid member 28 can be suppressed.

Further, according to the present embodiment, since the groove 285 is formed in the R portion 284 that is not in contact with the end portion 111 of the valve body 10, even if the projection 285c is produced by cutting or pressing, such projection can be removed. 285c never contacts the end 111 of the valve body 10 . Therefore, the gap d82, which may cause a brazing failure or the like, does not occur, eliminating the need to remove the projection 285c and reducing the number of man-hours during manufacturing.

Further, according to the present embodiment, as described with reference to FIG. 3, the lowermost portion 285b on the inner surface of the groove 285 is located in the axial direction (up and down in the drawing) from the outer edge 285a of the groove 285 for storing the brazing material 6. direction) away from the valve body 10 . Therefore, when brazing is fixed with the lid member 28 facing downward, the brazing material 6 accumulated in the groove 285 can be well retained inside the groove 285, and the outflow of the brazing material 6 can be further suppressed. can be attached and fixed.

In addition, in the present embodiment, the groove 285 has a shape such as an arc groove that can be easily processed, so that an increase in manufacturing cost due to the formation of the groove 285 can be suppressed.

In addition, according to the present embodiment, the outer diameter φ11 of the lid member 28 is larger than the outer diameter φ12 of the valve body 10, so that when the lid member 28 is positioned downward and fixed by brazing, the boundary between the two can be displaced. The brazing material 6 can be easily fastened, and the outflow of the brazing material 6 from the brazing part can be further suppressed to perform the brazing fixation.

In the refrigeration cycle device 5 of the present embodiment shown in FIG. 2, the lid member 28 can be brazed and fixed to the valve body 10 while suppressing the outflow of the brazing material 6 from the brazing portion as described above. It is equipped with a valve device 1 capable of

Next, various modifications of the above-described embodiment will be described with reference to FIGS. 6 and 7. FIG. All of these modifications differ from the above-described embodiment in the grooves provided in the lid member 28 .

FIG. 6 shows a first modification and a second modification to the embodiment shown in FIGS. 1-5. FIG. 7 shows a third modification to the embodiment shown in FIGS. 1-5. FIG. 8 is a diagram showing a fourth modification of the embodiment shown in FIGS. 1-5. Incidentally, in these modified examples, the same reference numerals as in the above-described embodiment are assigned to the portions other than the grooves.

In contrast to the above-described embodiment in which the R portion 284 of the lid member 28 is provided with a groove 285 having an arcuate cross section perpendicular to the circumferential direction of the outer periphery of the bottom wall 281, the second groove shown in FIG. In one modification, the groove 385 is a V-shaped groove having a V-shaped orthogonal cross section. This V-shaped groove 385 is also formed so as to face slightly upward when the lid member 28 and the valve body 10 are vertically placed as shown in FIG. 3 when fixed by brazing. Also in this V-shaped groove 385, the lowermost portion 385b on the inner surface of the groove 385 is farther away from the valve body 10 in the axial direction (vertical direction in the drawing) than the outer edge 385a.

In addition, in the second modification shown in FIG. 6, as the groove 386, there is provided a rectangular groove whose orthogonal cross-section is a rectangle whose long sides extend in the vertical direction when placed vertically. An outer edge 386a of the rectangular groove 386 is a tip edge of a protruding wall that protrudes like a rib from the bottom of the groove 386, which is the lowest portion 386b, formed by partially leaving the outer surface side of the R portion 284. . The lowermost portion 386b of the inner surface of the groove 386 is farther from the valve body 10 in the axial direction (the vertical direction in the drawing) than the outer edge 386a, which is the leading edge.

It goes without saying that in both the first and second modifications described above, the lid member 28 can be brazed and fixed to the valve body 10 while suppressing the outflow of the brazing material 6, as in the above-described embodiment. . Further, since the lowermost portions 385b, 386b are farther from the valve body 10 than the outer edges 385a, 386a, the brazing material 6 can be satisfactorily retained inside the grooves 385, 386, similar to the above-described embodiment. In addition, brazing can be fixed while suppressing the outflow of the brazing material 6 further. Furthermore, similar to the arcuate groove 285, the V-shaped groove 385 and the rectangular groove 386 are easy to process, so that an increase in manufacturing cost due to groove formation can be suppressed.

Further, according to the second modification in which the rectangular groove 386 is provided, the brazing material 6 can be effectively retained inside the groove 386 by the tip edge of the rib-shaped protruding wall forming the outer edge 386a of the groove 386. can.

In the third modification shown in FIG. 7, the grooves 387 have an arcuate orthogonal cross-section similar to that of the above-described embodiment, but the grooves 387 are arranged in three rows in the R portion 284 and the axis of the valve device 1. are formed concentrically with respect to This third modification is an example in which a groove 387 is formed in the R portion 284 of the lid member 28 whose thickness t31 is thinner than the thickness t11 of the lid member 28 in the above-described embodiment. When the groove 387 is provided in the thin cover member 28 in this way, the cross-sectional area of the groove is large as in the above-described embodiment, and a sufficient amount of brazing material 6 can be stored to prevent the outflow of the brazing filler metal 6 in order to suppress the decrease in strength. It may be difficult to provide a single deep groove. In the third modification, each groove 387 is a shallow groove having a small groove cross-sectional area to suppress a decrease in strength, and three such grooves 387 are provided. We are trying to secure it. Incidentally, the number of the grooves 387 is not limited to three, and can be set as appropriate according to the thickness of the lid member 28 and the necessary amount of brazing material 6 to be stored.

In each of the above-described embodiment and the first to third modifications, the corner portion between the outer peripheral surface 283 of the lid member 28 and the outer surface 281a of the bottom wall 281 is formed with an R portion 284 as a chamfered portion. On the other hand, in the fourth modification shown in FIG. 8, a C (Chamfer) portion 394 at the corner portion is a chamfered portion that slopes from the outer surface 281 a of the bottom wall 281 to the outer peripheral surface 283 of the lid member 28 . is formed as As with the R portion 284 described above, the C portion 394 is also formed so that the chamfering start position 394a on the bottom wall 281 side is located inside the outer periphery 10a of the valve body 10 . In the fourth modification, one groove 395 having an arcuate cross section is formed substantially in the center of this C portion 394 . Also in the fourth modification, the outer diameter φ11 of the lid member 28 is larger than the valve main body φ12. In the fourth modified example described above, similarly to the above-described embodiment and the first to third modified examples, the outflow of the brazing material 6 from the brazing portion is suppressed, and the cover member 28 is brazed and fixed to the valve body 10. It goes without saying that you can.

It should be noted that the above-described embodiments and modifications merely show typical forms of the present invention, and the present invention is not limited to these. That is, various modifications can be made without departing from the gist of the present invention. As long as the valve device and the refrigeration cycle device of the present invention are provided even with such a modification, it is of course included in the scope of the present invention.

For example, in the embodiment and modification described above, the valve device 1 as an electrically operated valve in which the valve body 30 is driven by the stepping motor 70 is exemplified as an example of the valve device. However, the valve device is not limited to this, and may be, for example, a manual valve whose valve element is manually driven, or an electromagnetic valve whose valve element is driven by a solenoid. Further, even if the valve is an electric valve, the driving portion thereof is not limited to a stepping motor, and may be another motor.

In addition, in the above-described embodiment and modifications (in modifications, the second and third modifications shown in FIG. 6), the following grooves 285, 385, 386, 395 are illustrated. That is, the grooves 285, 385, 386, 395 have the lowermost portions 285b, 385b, 386b further from the valve body 10 than the outer edges 285a, 385a, 386a. However, the grooves provided in the lid member are not limited to these, and the position of the outer edge and the like may be appropriately set as long as the brazing material can be stored. However, by separating at least a part of the inner surface of the grooves 285, 385, 386, 395 from the valve body 10 more than the outer edges 285a, 385a, 386a, the pooled brazing filler metal 6 can be well retained in the grooves. is as described above.

Further, in the above-described third modified example, as an example of the outer edge of the groove provided in the cover member, the outer edge 386a that is the tip edge of the protruding wall that protrudes in a rib shape is exemplified. However, the outer edge of the groove is not limited to this, and may not have such a protruding structure as exemplified in the above embodiments and other modifications. However, as described above, the brazing material can be effectively retained in the groove by forming the outer edge 386a as the tip edge of the rib-shaped protruding wall. Here, in the third modified example, as an example of the outer edge that is the tip edge of the projecting wall, the outer edge formed by partially leaving the outer surface side of the R portion 284 when forming the rectangular groove 386 386a is illustrated. However, the outer edge, which is the leading edge of the projecting wall, is not limited to this, and its specific shape and forming method are not limited.

Further, in the above-described embodiment and modification, examples of the grooves provided in the lid member include the grooves 285 and 387 having arc-shaped orthogonal cross sections, the groove 385 having a V-shaped orthogonal cross section, and the groove 386 having a rectangular cross section. is exemplified. However, the grooves provided in the cover member are not limited to these, and the specific groove shape can be set arbitrarily. However, as described above, by adopting groove shapes that are easy to process, such as circular arcs, V-shapes, and rectangular shapes, it is possible to suppress an increase in manufacturing cost associated with groove formation.

Further, in the above-described embodiment and modification, the valve device 1 in which the outer diameter φ11 of the lid member 28 is larger than the outer diameter φ12 of the valve main body 10 is illustrated as an example of the valve device. However, the valve device is not limited to this, and the outer diameter of the lid member and the outer diameter of the valve body may be the same, or the outer diameter of the lid member may be larger than the outer diameter of the valve body. A smaller one or the like may be used. However, by making the outer diameter φ11 of the lid member 28 larger than the outer diameter φ12 of the valve body 10, it is possible to further suppress the outflow of the brazing material 6 from the brazing portion and perform the brazing fixation as described above. Street.

Reference Signs List 1 valve device 5 refrigerating cycle device 6 brazing material 10 valve main body 10a outer periphery 11 valve chamber 12 valve port 28 lid member 30 valve body 71 rotor case 111 end portion 112 entrance hole 281 bottom wall 281a outer surface 282 passage port 283 outer peripheral surface 284 R portion (Chamfered part)
284a, 394a Chamfering start position 285, 385, 386, 387, 395 Groove 285a, 385a, 386a Outer edge 285b, 385b, 386b Lowermost portion 285c Projection 286 Welding location 394 C portion (chamfered portion)
d11 outer diameter t11, t31 thickness φ11, φ12 outer diameter

Claims (7)

a valve body internally provided with a valve chamber accommodating a fluid flowing in and out of a first port, and a valve opening allowing the fluid to flow in and out between the interior of the valve chamber and a second port;
a valve body that enters the valve chamber from the outside of the valve body and is provided so as to be able to move forward and backward with respect to the valve opening, and that changes the opening degree of the valve opening;
It is formed in a bottomed cylindrical shape having a bottom wall provided with a passage port for the valve body, and the end is placed in a state in which the outer surface of the bottom wall is directed toward the end portion of the valve body where the valve body entrance port is open. a lid member in which the bottom wall is brazed and fixed around the entrance in the part,
A chamfered portion chamfered over the entire outer periphery of the bottom wall is formed at a corner portion between the outer peripheral surface of the lid member and the outer surface of the bottom wall. It is formed so as to be located inside the outer circumference,
A valve device, wherein the chamfered portion is formed with at least one groove extending along the outer periphery of the bottom wall. 2. The valve device according to claim 1, wherein the valve device is an electrically operated valve having a driving portion that drives the valve body forward and backward with respect to the valve opening by means of a motor. 3. The groove is characterized in that at least a portion of the inner surface of the groove is further away from the valve body in the axial direction than an outer edge of the pair of edges of the groove located on the outer peripheral surface side of the lid member. 3. The valve device according to 1 or 2. The outer edge of the groove is a tip edge of a protruding wall that protrudes like a rib from the bottom of the groove, and at least a part of the inner surface of the groove is axially farther from the valve body than the tip edge. 4. The valve arrangement of claim 3, wherein the valve arrangement is spaced apart. The groove is an arcuate groove in which the cross section orthogonal to the circumferential direction of the outer circumference of the bottom wall has an arc shape, or a V-shaped groove in which the orthogonal cross section has a V shape, or a rectangular shape in which the orthogonal cross section has a rectangular shape. The valve device according to any one of claims 1 to 4, characterized in that it is a groove. The valve device according to any one of claims 1 to 5, wherein the outer diameter of the lid member is larger than the outer diameter of the valve body. A refrigeration cycle apparatus comprising the valve device according to any one of claims 1 to 6 in a refrigerant circuit.

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