JP5406887B2 - Valve device and method for manufacturing valve device - Google Patents

Description

  The present invention relates to a brazing structure in which a plurality of piping members are brazed to an adherend and a method for brazing the piping members, and more specifically, is suitable for use in a structure constituting a part of a valve device. The present invention relates to a brazing structure and a brazing method suitable for forming a part of a valve device.

  In a small valve device used in a refrigerant circulation cycle such as an air conditioner, a refrigerator, or a vending machine, a valve body and a pipe joint are connected and fixed by brazing. For example, Patent Document 1 discloses an electromagnetic four-way valve in which three pipe joints are connected and fixed to a valve seat fixing portion of a valve body by brazing. Patent Document 2 discloses an electric switching valve in which three pipe joints are connected and fixed to a bottom cover member of a valve body by brazing. Further, in Patent Document 3, in a flow control valve in which a pipe joint is brazed to a valve main body, the melted brazing material flows into the valve main body so that the fluid characteristics of the valve main body are not impaired. A device structure is disclosed.

  The pipe joint brazing method in these conventional valve devices will be briefly described with reference to FIG. As shown in FIG. 10, when two pipe joints 111 and 112 are connected and fixed to the adherend surface 120a of the valve seat member 120, the pipe joints 111 and 112 are openings formed in the adherend surface 120a. In a state of being inserted into 121 and 122, the outer peripheral surfaces of the pipe joints 111 and 112 and the peripheral portions of the openings 121 and 122 are brazed.

  As a brazing method at this time, a connecting portion between the pipe joints 111 and 112 and the valve seat member 120 is heated in advance, and a brazing material melted by a feeder or the like is added to the connecting portion and brazed. A brazing method called so-called brazing, and a so-called brazing method in which a brazing material is placed in advance at the connection between the pipe joints 111 and 112 and the valve seat member 120 and the brazing material is heated. There is a method called brazing.

Japanese Utility Model Publication No. 7-20475 JP 2004-263726 A JP 2003-161550 A

  In recent years, there has been a demand for further miniaturization of valve devices such as three-way valves and four-way valves used in refrigerant circulation cycles such as air conditioners and refrigerators. When downsizing a valve device having a plurality of valve ports (openings) such as a three-way valve or a four-way valve, for example, in FIG. 10, the separation distance C ′ between the openings 121 and 122 formed in the adherend surface 120a is set. It can be considered that the valve seat member 120 is reduced in size by reducing the length, and the entire valve device is reduced in size. Further, when the separation distance C ′ is shortened, the sliding distance of a slide valve body (not shown) that slides on the valve seat surface 120b is also shortened, which is advantageous in terms of reducing wear of the slide valve body and valve responsiveness. It is thought that it becomes.

  However, when the separation distance C ′ is shortened, it is difficult to braze the pipe joints 111 and 112 to the adherend surface 120a of the valve seat member 120 with high accuracy. For example, in the case of brazing, the relative position between the feeder and the valve seat member 120 and the pipe joints 111 and 112 varies slightly. Therefore, if the separation distance C is small, the portion between the pipe joints 111 and 112 is reduced. When brazing, there is a problem that the brazing material cannot be supplied to an appropriate position due to variation, or the feeder may come into contact with the pipe joints 111 and 112, and the quality of brazing is not stable. is there.

  Further, in the case of placing brazing, if the separation distance C ′ is shortened, a space for arranging the brazing material between the pipe joints 111 and 112 cannot be secured. Even if the brazing filler metal can be arranged, the brazing filler metal of the pipe joint 111 and the brazing filler metal of the pipe joint 112 come into contact with each other when the brazing filler metal is melted, so that the other brazing filler metal is in contact with the previously melted brazing filler metal. Since it is attracted, there is a problem that a brazing defect occurs.

  Therefore, the present inventors devised an oval brazing material 110a that can be externally mounted on the two pipe joints 111 and 112, and arranged as shown in FIG. I thought about shortening.

  However, with such an elliptical brazing material 110a, high dimensional accuracy is required for the production of the brazing material 110a. For example, if the brazing material 110a is small, it cannot be sheathed on the pipe joints 111 and 112, and conversely. If the brazing filler metal 110a is large, a poor contact portion where the pipe joint and the brazing filler metal 110a do not come into contact with each other as shown in the a 'part of FIG. When such a poor contact portion occurs, brazing is not performed well, and brazing failure occurs. Further, the brazing material 110a is attracted to the previously melted side, resulting in a brazing defect.

  In addition, the present inventors have devised C-ring shaped brazing materials 111a and 112a and orienting the opening of the C-ring to the side between the pipe joints 111 and 112 as shown in FIG. Therefore, it was considered to shorten the separation distance C ′.

  However, in such a C-ring shaped brazing material 111a, 112a, the position of the brazing material 111a, 112a is extremely important, and there is a problem that the assembly workability is poor. For example, if the brazing materials 111a and 112a rotate during the assembly of the pipe joints 111 and 112, the brazing materials 111a and 112a come into contact with each other as shown in FIG. Since the other brazing material is attracted toward the melted brazing material, a brazing defect occurs.

  The present invention has been made in view of such conventional problems, and is a brazed structure in which a plurality of piping members are brazed to an adherend, and the plurality of piping members are in close proximity to each other. An object of the present invention is to provide a brazed structure that is accurately brazed to a body.

  Another object of the present invention is to provide a piping member brazing method capable of brazing a plurality of piping members close to an adherend with high accuracy.

The present invention has been invented in order to achieve the problems and objects in the prior art as described above,
The valve device of the present invention is
The adherend includes a plurality of piping members and an adherend having a plurality of openings formed on an adherend surface, and each of the plurality of piping members communicates with one of the plurality of openings. A valve device brazed to the adherend surface,
Each of the plurality of piping members is brazed to the adherend surface by a brazing material disposed at a peripheral edge portion of the opening,
A step is formed between at least two openings closest to each other among the plurality of openings, and one of the two openings is formed at a position lower than the other. And

According to such a valve device of the present invention, a step is formed between at least two of the plurality of openings that are closest to each other, and one of the two openings is the other. Since it is formed at a lower position, it is possible to prevent the brazing materials arranged at the peripheral portions of these two openings from contacting each other .
For this reason, since a several piping member (for example, pipe joint) adjoins to a to-be-adhered body (for example, valve seat member) accurately in the state which adjoined, a valve apparatus can be reduced in size. In addition, since the sliding distance of the slide valve body is shortened, wear of the slide valve main body is reduced, and a valve device having excellent valve response can be obtained.

In the above invention,
The distance in plan view of the two openings closest to each other is C,
Of the two openings closest to each other, the width in plan view of the brazing material disposed at the peripheral portion of one opening is d ₁ , and the plan view of the brazing material disposed in the peripheral portion of the other opening The width of d ₂ ,
In this case, it is desirable to satisfy the following relationship.
If d ₁ ≧ d ₂ :
d ₁ <C < d ₁ + d ₂
If d ₁ <d ₂ :
d ₂ <C < d ₁ + d ₂

With such a configuration, the distance C in the plan view of the two openings is smaller than the sum (d ₁ + d ₂ ) of the widths in the plan view of the two brazing materials, thereby reducing the size of the valve device. be able to.

In the above invention,
Of the two openings closest to each other, the one opening is positioned below the step, and the height of the brazing material disposed at the peripheral edge of the one opening is h ₁ , When the height of the step is H, it is desirable to satisfy the following relationship.
h ₁ <H

  In such a configuration, since the height H of the step is larger than the height h1 of the brazing material located on the lower side of the step, the brazing material located on the lower side of the step and the brazing material located on the upper side Can be reliably prevented from contacting.

Moreover, the manufacturing method of the valve device of the present invention includes:
The plurality of piping members are brazed to the adherend surface of the adherend so that each of the plural pipe members communicates with one of the plurality of openings formed in the adherend surface of the adherend. A method of manufacturing a valve device ,
Preparing an adherend in which a step is formed between at least two openings that are closest to each other among the plurality of openings;
A brazing material sheathing step of sheathing a brazing material with respect to each of the plurality of piping members;
A brazing filler metal placement step of bringing the brazing filler metal sheathed on the piping member into contact with the peripheral edge of the opening;
A brazing step of melting the brazing material and brazing the plurality of piping members to the adherend surface of the adherend.

According to the manufacturing method of the valve device of the present invention, since the brazing material arranged at the peripheral edge portions of the two openings can be arranged apart from the upper side and the lower side of the step, The brazing materials arranged in the peripheral portion do not come into contact with each other, and a plurality of piping members can be brazed with good precision close to the adherend.

  In addition, since the brazing material is disposed by bringing the brazing material sheathed on the piping member into contact with the peripheral portion of the opening, the piping member and the brazing material can be easily and accurately disposed.

  According to the present invention, a step is formed between at least two openings that are closest to each other among the plurality of openings formed on the adherend surface of the adherend. It can prevent that the brazing materials arrange | positioned at the peripheral part of contact. Therefore, since the brazing failure due to the contact of the brazing material does not occur at the time of brazing, it is possible to provide a brazing structure in which the piping member is brazed with high accuracy.

  Further, according to the present invention, since the plurality of piping members (for example, pipe joints) are closely brazed to the adherend (for example, the valve seat member), the valve device can be reduced in size. In addition, since the sliding distance of the slide valve body is shortened, wear of the slide valve main body is reduced, and a valve device having excellent valve response can be obtained.

  Further, according to the present invention, there is provided an adherend having a step formed between at least two openings closest to each other, and a pipe member is brazed to the adherend. The brazing material disposed on the upper side and the lower side of the step can be separated from each other. For this reason, the brazing method of the piping member which can braze a some piping member close to a to-be-adhered body accurately, without the brazing materials arrange | positioned at the peripheral part of two openings contacting. Can be provided.

FIG. 1 is a perspective view showing a brazing structure of the present invention. FIG. 2 is a plan view and a cross-sectional view showing the brazing structure of the present invention. FIG. 3 is a perspective view showing a brazed structure of a comparative example. FIG. 4 is a view showing an example of the brazing material of the present invention. FIG. 5 is a view showing a modification of the adherend (valve seat member) of the present invention. FIG. 6 is a perspective view showing a brazing structure according to a second embodiment of the present invention. FIG. 7 is a plan view and a cross-sectional view showing a brazing structure according to a second embodiment of the present invention. FIG. 8: is the perspective view and top view which showed the brazing structure of the 3rd Embodiment of this invention. FIG. 9 is a perspective view and a plan view showing a brazed structure of a comparative example. FIG. 10 is a diagram for explaining a conventional brazing method. FIG. 11 is a view for explaining an example of a conventional brazing material. FIG. 12 is a view for explaining an example of a conventional brazing material.

Hereinafter, embodiments of the present invention will be described in more detail based on the drawings.
However, the scope of the present invention is not limited to the following embodiments. The dimensions, materials, shapes, relative arrangements, and the like of the components described in the following embodiments are merely descriptions, not to limit the scope of the present invention, unless otherwise specified.

  The brazing structure of the present invention is particularly preferably used as a structure constituting a part of a valve device such as a three-way valve or a four-way valve. Therefore, in the following description, the brazing structure of the present invention is a brazing structure in which a plurality of pipe joints are brazed in the state of being close to the valve seat member and constitute a part of the valve device. An example will be described.

<First Embodiment>
FIG. 1 is a perspective view showing a brazing structure according to a first embodiment of the present invention. 2A and 2B are a plan view and a cross-sectional view showing the brazed structure according to the first embodiment of the present invention. FIG. 2A is a plan view and FIG. It is sectional drawing in A line.

  As shown in FIG. 1, the brazed structure 1 a of the present embodiment includes two pipe joints 11 and 12 and a cylindrical valve seat member 20, and the pipe joints 11 and 12 are covered. It is configured by being connected and fixed by brazing to the adherend surface 20a of the valve seat member 20 which is a body.

  The valve seat member 20 is formed with two valve holes 21 and 22 that penetrate the axial direction from the adherend surface 20a to the valve seat surface 20b. Then, two openings 21a and 22a are formed on the adherend surface 20a, and two openings 21b and 22b are formed on the valve seat surface 20b.

In addition, the hole diameters of the valve holes 21 and 22 are changed in the middle, the large diameter portions 21c and 22c on the adherend surface 20a side, and the small diameter portions 21d and 22d on the valve seat surface 20b side. Further, the inner diameter of the large diameter portion 21c of the valve hole 21 is formed to be the same as or slightly larger than the outer diameter of the pipe joint 11 so that the pipe joint 11 can be inserted. Further, the small diameter portion 21 d of the valve hole 21 is formed to have a diameter substantially the same as the inner diameter of the pipe joint 11.

Similarly, the large diameter portion 22c of the valve hole 22 is formed to be the same as or slightly larger than the outer diameter of the pipe joint 12 so that the pipe joint 12 can be inserted. Further, the small diameter portion 22 d of the valve hole 22 is formed to have substantially the same diameter as the inner diameter of the pipe joint 12.

  Further, as shown in FIGS. 1 and 2B, a step 24 is formed in the vicinity of the peripheral portion of the opening 21a, and the step 24a is lower than other portions of the adherend surface 20a. Is formed. That is, the opening 21 a is formed at a position below the step 24, and the opening 22 a is formed at a position above the step 24.

  As a material of the valve seat member 20, copper, brass, stainless steel, or the like can be suitably used. Moreover, such a valve seat member 20 is manufactured by, for example, drilling a cylindrical member to form the valve holes 21 and 22, and forming the step 24 by cutting.

  Further, as shown in FIG. 1, annular brazing materials 11 a and 12 a are externally provided on the outer circumferences of the pipe joints 11 and 12. Moreover, the material of the pipe joints 11 and 12 can use copper, brass, stainless steel, etc. suitably like the valve seat member 20 mentioned above. The brazing materials 11a and 12a are made of a material having a melting point lower than that of the valve seat member 20 and the pipe joints 11 and 12, and for example, copper brazing, silver brazing, brass brazing, phosphor copper brazing, or the like is used. it can.

  The pipe joints 11 and 12 covered with the brazing materials 11 a and 12 a described above are inserted into the valve holes 21 and 22 from the openings 21 a and 21 b of the valve seat member 20. And the front-end | tip of the pipe joint 11 is inserted to the position which contact | abuts the small diameter part 21d of the valve hole 21, and the brazing | wax material 11a armored by the pipe joint 11 contact | abuts the step part 24a of the to-be-attached surface 20a. Further, when the distal end of the pipe joint 12 is inserted to a position where it comes into contact with the small diameter portion 22d of the valve hole 22, the brazing material 12a that is sheathed on the pipe joint 12 comes into contact with the adherend surface 20a. And as shown to (b) of FIG. 2, the brazing | wax materials 11a and 12a are arrange | positioned at the peripheral part of opening 21a, 22a.

  In the state shown in FIG. 2B, the pipe joints 11, 12 and the openings 21a, 22a communicate with each other by heating and melting the brazing filler metals 11a, 12a. 12 is brazed to the adherend surface 20 a of the valve seat member 20.

  As shown in FIGS. 1 and 2, the brazing structure 1a thus formed has a step 24 formed between the opening 21a and the opening 22a, and the opening 21a is more than the opening 21b. Since it is formed at a low position, the height of the brazing material 11a and the brazing material 12a can be shifted. Therefore, even if the opening 21a and the opening 22a are formed at positions close to each other in plan view, it is possible to prevent the brazing materials 11a and 12a arranged at the peripheral portions of the two openings 21a and 22a from contacting each other. .

  Therefore, when the brazing material is melted, no other brazing material is attracted to the previously melted brazing material, and brazing failure does not occur. Therefore, the pipe joints 11 and 12 can be brazed to the mounting surface 20a of the valve seat member 20 with high accuracy.

  On the other hand, for example, as shown in FIG. 3, in the brazed structure 1a ′ of the comparative example in which no step is formed between the opening 21a ′ and the opening 22a ′, the opening 21a and the opening 22a are planar. If it forms in the position close | similar visually, as shown to (b) of FIG. 3, brazing material 11a 'and 12b' will contact, and the brazing defect will generate | occur | produce at the time of brazing in a part. Further, even if one brazing material (for example, the brazing material 12a ′) is separated from the adherend surface 20a ′ and the brazing material 12a ′ is melted, the pipe joint 12 and the adherend surface 20a are not fixed at the portion b. It will be brazed. Further, since the brazing material 12a 'is not in contact with the valve seat, the heat conduction is poor and may not melt.

In the brazed structure 1a of the present embodiment, the distance C in the plan view of the openings 21a and 21b is such that the width of the brazing material 11a in plan view is d ₁ and the width of the brazing material 12a in plan view is d ₂ . In such a case, the following relationship is satisfied.
If d ₁ ≧ d ₂ :
d ₁ <C < d ₁ + d ₂
If d ₁ <d ₂ :
d ₂ <C < d ₁ + d ₂

In other words, a step 24 is formed between the opening 21a and the opening 22a, and the brazing materials 11a and 12a can be arranged at different heights. Therefore, the separation distance C is set to the plane of the two brazing materials 11a and 12a. It can be made smaller than the total visual width. Thereby, the to-be-adhered surface 20a can be made small, and it becomes possible to reduce in size the brazing structure 1a. In order to arrange the brazing material between the pipe joints 11 and 12, the separation distance C must be larger than the larger _one of the widths d ₁ and d _{2 in} plan view of the two brazing materials 11a and 11b. I must.

Further, the brazing structure 1a of the present embodiment, the height of the step 24 H, the height of the brazing material 11a when the h _1, is configured to satisfy the following relationship.
h ₁ <H

That is, if the height H of the step 24 is larger than the height h _{1 of} the brazing material 11a, the brazing material 11a located below the step 24 and the 12a located above the step 24 are in contact with each other. This is preferable because it can be surely prevented and the accuracy of brazing can be improved.

In the present invention, the method for producing the brazing filler metal 11a, 12a is not particularly limited. For example, the brazing filler metal 11a, 12a is formed by spirally winding a long linear brazing filler metal and cutting it one turn at a time. . As shown in FIG. 4, the brazing material 11a manufactured in this manner is in a state in which one end side and the other end side of the brazing material 11a are shifted in the height direction, and the entire height of the annular brazing material 11a. Is at most about 2h ₁ .

Therefore, even if the one end side and the other end side of the brazing material 11a are shifted in the height direction by configuring the height H of the step 24 so as to satisfy the relationship of 2h ₁ <H, the brazing will be performed. It is possible to reliably prevent the materials 11a and 12a from coming into contact with each other, and the brazing accuracy can be further increased.

  In the brazed structure 1a of the present invention, the planar shape of the step 24 formed on the adherend surface 20a is not limited to the above-described embodiment. In the present invention, if the step 24 is formed between the openings 21a and 22a and the opening 21a is formed at a position lower than the opening 22a, for example, as shown in FIG. The step 24 may be formed as shown in FIG. 5B.

  The brazed structure 1a of the present embodiment configured as described above has an opening 21b formed in the valve seat surface 20b by a slide valve body (not shown) reciprocatingly sliding on the valve seat surface 20b. , 22b can be suitably used as a structure that forms part of a valve device (for example, an electromagnetic three-way valve) that is selectively opened and closed. If a part of the valve device is constituted by such a brazed structure 1a, the valve device is reduced in size because the pipe joints 11 and 12 are brazed to the valve seat member 20 with high accuracy in a state of being close to each other. be able to. In addition, since the sliding distance of the slide valve body is shortened, wear of the slide valve main body is reduced, and a valve device having excellent valve response can be obtained.

<Second Embodiment>
Next, a brazing structure 1b according to a second embodiment of the present invention will be described with reference to FIGS. FIG. 6 is a perspective view showing a brazing structure according to a second embodiment of the present invention. 7A and 7B are a plan view and a cross-sectional view showing the brazed structure according to the second embodiment of the present invention. FIG. 7A is a plan view, and FIG. It is sectional drawing in a B line.
The brazed structure 1a of the present embodiment has basically the same configuration as the brazed structure 1a of the first embodiment described above, and the same components are denoted by the same reference numerals. Detailed description thereof is omitted.

  Unlike the embodiment described above, the brazed structure 1b of the present embodiment includes three pipe joints 11, 12, and 13. The valve seat member 20 has three valve holes 21, 22, 23, and each of the three pipe joints 11, 12, 13 has openings 21 a, The valve seat member 20 is brazed to the corresponding one of 22a and 23a.

  Further, in the present embodiment, as shown in FIG. 7A, the opening 21a and the opening 22a and the opening 21a and the opening 23a are closest to each other, and the separation distances thereof are both C. On the other hand, the opening 22a and the opening 23a are spaced apart so that at least the brazing materials 12a and 13a do not overlap in plan view.

  Then, as shown in FIGS. 6 and 7B, a step 24 is formed in the vicinity of the peripheral edge of the opening 21a and is lower than other portions of the adherend surface 20a. Is formed. That is, the opening 21 a is formed at a position below the step 24, and the openings 22 a and 23 a are formed at a position above the step 24.

In the brazed structure 1b of the present embodiment configured as described above, a step 24 is formed between the opening 21a and the opening 22a, as in the above-described embodiment, and the opening 21a becomes the opening 21b. On the other hand, since it is formed at a low position, the heights of the brazing material 11a and the brazing material 12a can be shifted. The same is true between the opening 21a and the opening 23a, and the brazing material 11a and the brazing material 13a can be arranged at different heights.
Therefore, even if the opening 21a and the opening 22a and the opening 21a and the opening 23a are formed at positions close to each other in plan view, the brazing materials 11a, 12a, It can prevent that 13a contacts mutually.

  Further, the brazed structure 1b of the present embodiment configured as described above is formed on the valve seat surface 20b by a slide valve body (not shown) reciprocatingly sliding on the valve seat surface 20b. It is suitably used as a part of a valve device (for example, an electromagnetic four-way valve) in which the openings 21b, 22b, and 23b are selectively opened and closed. If a part of the valve device is constituted by such a brazing structure 1b, the valve device is reduced in size because the pipe joints 11, 12, and 13 are brazed to the valve seat member 20 with high accuracy. be able to. In addition, since the sliding distance of the slide valve body is shortened, wear of the slide valve main body is reduced, and a valve device having excellent valve response can be obtained.

<Third Embodiment>
Next, a brazing structure 1c according to a third embodiment of the present invention will be described with reference to FIGS. FIG. 8 is a perspective view and a plan view showing a brazing structure according to a third embodiment of the present invention. FIG. 9 is a perspective view and a plan view showing a brazed structure of a comparative example.
The brazed structure 1c of the present embodiment has basically the same configuration as the brazed structures 1a and 1b of the first and second embodiments described above, and the same constituent members have the same structure. Reference numerals are assigned and detailed description thereof is omitted.

  As shown in FIG. 8, the brazed structure 1 c of this embodiment includes three pipe joints 11, 12, and 13. The valve seat member 20 has three valve holes 21, 22, 23, and each of the three pipe joints 11, 12, 13 has openings 21 a, The valve seat member 20 is brazed so as to communicate with the corresponding one of 22a and 23a. Although not shown, a valve seat surface is formed on the back side of the adherend surface 20a, and three openings corresponding to the valve holes 21, 22, and 23 are formed on the valve seat surface. A valve housing 32 is integrally connected to the valve seat surface side of the valve seat member 20, and a valve chamber 34 is defined between the inner surface of the valve housing 32 and the valve seat surface.

  In the present embodiment, as shown in FIG. 8B, the opening 21a and the opening 22a are closest to each other, and the separation distance is C. On the other hand, the opening 21a and the opening 23a, and the opening 22a and the opening 23a are spaced apart so that at least the brazing materials do not overlap in plan view.

  And as shown in FIG. 8, the level | step difference 24 is formed in the peripheral part vicinity of the opening 21a, and the step part 24a lower than the other part of the to-be-adhered surface 20a is formed. That is, the opening 21 a is formed at a position below the step 24, and the openings 22 a and 23 a are formed at a position above the step 24.

In the brazed structure 1c of the present embodiment configured as described above, a step 24 is formed between the opening 21a and the opening 22a, as in the above-described embodiment, and the opening 21a becomes the opening 21b. On the other hand, since it is formed at a low position, the heights of the brazing material 11a and the brazing material 12a can be shifted.
Therefore, even if the opening 21a and the opening 22a are formed at positions close to each other in plan view, it is possible to prevent the brazing materials 11a and 12a arranged at the peripheral edges of the two openings 21a and 22a from contacting each other.

  In addition, the brazed structure 1c of the present embodiment has two openings formed in the valve seat surface (valve hole 21) by rotating a slide valve body (not shown) from the center of the valve seat surface. And an opening corresponding to the valve hole 22), and is preferably used as a part of a valve device (for example, an electric switching valve) for switching the outflow direction of the fluid flowing into the valve chamber from the valve hole 23. If a part of the valve device is constituted by such a brazing structure 1c, the valve device can be miniaturized because the valve joint member 11 and 12 are brazed to the valve seat member 20 with high accuracy. it can. In addition, since the angle θ at which the slide valve body rotates can also be reduced, it is possible to provide a valve device with reduced wear of the slide valve body and excellent valve response.

  On the other hand, for example, as shown in FIG. 9, in the brazed structure 1c ′ of the comparative example in which no step is formed between the opening 21a ′ and the opening 22a ′, the brazing materials 11a ′ and 12a ′ are In order not to overlap, as shown in FIG. 9B, the separation distance needs to be C ′ (C <C ′) or more. Further, the angle θ ′ at which the slide valve body rotates is also increased.

  As mentioned above, although the preferable form of this invention was demonstrated, this invention is not limited to said form, A various change in the range which does not deviate from the objective of this invention is possible.

  For example, in the above-described embodiment, the pipe joints 11, 12... With the brazing materials 11 a, 12 a... Are inserted into the valve holes 21, 22, and the brazing materials 11 a, 12 a. The pipe joints 11, 12 and the brazing materials 11a, 12a,... Are positioned by inserting the pipe joints 11, 12,. In this way, the pipe joints 11, 12... And the brazing materials 11a, 12a... Can be arranged at the same time, and the brazing materials 11a, 12a. Since it can arrange | position with sufficient precision so that it may contact | abut, it is preferable. However, the brazing structure of the present invention is not limited to this, and the pipe joints 11, 12... And the brazing materials 11 a, 12 a. It is good.

  For example, in the above-described embodiment, the case where the brazing structure of the present invention is incorporated into a part of the valve device has been described as an example. However, the use of the brazing structure of the present invention is not limited to this. In the circulation cycle, it can also be suitably used for a distributor (branch) provided for diverting the refrigerant.

1a, 1b, 1c Brazing structure 11, 12, 13 Pipe joint (piping member)
11a, 12a, 13a Brazing material 20 Valve seat member (adhered body)
20a Adhering surface 20b Valve seat surface 21, 22, 23 Valve hole 21a, 22a, 23a Opening 21b, 22b, 23b Opening 21c, 22c Large diameter part 21d, 22d Small diameter part 24 Step 24a Step part 32 Valve housing 34 Valve chamber 111 , 112 Pipe joint 110a, 111a, 112a Brazing material 120 Valve seat member 120a Adhering surface 120b Valve seat surface 121, 122 Opening

Claims (4)

The adherend includes a plurality of piping members and an adherend having a plurality of openings formed on an adherend surface, and each of the plurality of piping members communicates with one of the plurality of openings. A valve device brazed to the adherend surface,
Each of the plurality of piping members is brazed to the adherend surface by a brazing material disposed at a peripheral edge portion of the opening,
A step is formed between at least two openings closest to each other among the plurality of openings, and one of the two openings is formed at a position lower than the other. And valve device . The distance in plan view of the two openings closest to each other is C,
Of the two openings closest to each other, the width in plan view of the brazing material disposed at the peripheral portion of one opening is d ₁ , and the plan view of the brazing material disposed in the peripheral portion of the other opening The width of d ₂ ,
The valve device according to claim 1, wherein the following relationship is satisfied.
If d ₁ ≧ d ₂ :
d ₁ <C < d ₁ + d ₂
If d ₁ <d ₂ :
d ₂ <C < d ₁ + d ₂ Of the two openings closest to each other, the one opening is positioned below the step, and the height of the brazing material disposed at the peripheral edge of the one opening is h ₁ , The valve device according to claim 2, wherein when the height of the step is H, the following relationship is satisfied.
h ₁ <H The plurality of piping members are brazed to the adherend surface of the adherend so that each of the plural pipe members communicates with one of the plurality of openings formed in the adherend surface of the adherend. A method of manufacturing a valve device ,
Preparing an adherend in which a step is formed between at least two openings that are closest to each other among the plurality of openings;
A brazing material sheathing step of sheathing a brazing material with respect to each of the plurality of piping members;
A brazing filler metal placement step of bringing the brazing filler metal sheathed on the piping member into contact with the peripheral edge of the opening;
By melting the brazing material, method of manufacturing the valve device characterized by having a brazing step of subjecting the wax to the plurality of piping member to an adherend surface of the adherend.

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