KR100222100B1 - Hose connection of outside plate - Google Patents

Abstract

[assignment]

Provides hose connection port of outer plate that has high connection strength and leakage prevention effect, easy processing and welding work, and secure connection of hose.

[Configuration]

A pipe lead-out hole 11 is formed in the metal outer plate 12 of the device, and the front end of the metal pipe 10 is drawn out through the pipe lead-out hole 11 inside the device, and the copper pipe 10 A hose connecting hole 100 of a rubber lake 13 for connecting a rubber hose 13 to a distal end thereof, the end having a flange portion 15 covering the outer edge of the pipe outlet hole 11 at one end thereof, A metal support tube 1 having an outer fitting portion 16 fitted on the outside of the pipe 10 and an annular protrusion 17 on which the rubber hose 13 is fitted on the outside. In addition, the outer edges of the flange portion 15 and the pipe lead-out hole 11 of the outer plate 12 are welded, and the outer end portions 16 of the support pipe 1 and the tip of the copper pipe 10 The fitting portion of was welded.

Description

Hose port of outer shell

1 is a cross-sectional view of the hose connector of the outer plate. (First embodiment).

2 is an explanatory diagram showing a procedure of attaching a hose connecting portion of an outer shell (first embodiment).

3 is a conceptual diagram of an absorption refrigeration apparatus. (First embodiment).

4 is a sectional view of a hose connector. (Second Embodiment)

5 is an explanatory diagram showing a procedure of attaching a hose connection port (second embodiment).

6 is a perspective view of an outer plate. (Third Embodiment)

* Explanation of symbols for main parts of the drawings

1: support tube 2: player

3: absorber 4: evaporator

5: condenser 10: copper pipe (metal pipe)

11: drawing hole (pipe drawing hole) 11t: cylindrical part

12: Outer plate (metal outer plate) 13: Rubber hose

14: protruding plane 15: flange portion

15a: reverse bending flange portion 16: outer side fitting portion

17: annular projection 100: hose connection port

500: freezer body

[Purpose of invention]

[Technical problem to which the invention belongs]

The present invention relates to a hose connector for connecting a hose to a pipe installed through an outer plate of the device.

[Prior art]

In an absorption refrigeration apparatus, an aqueous solution (absorption liquid) such as lithium bromide at low concentration is heated / boiled by a regenerator and separated into a solution such as water (refrigerant) and a high concentration absorption liquid (high concentration lithium bromide aqueous solution). The refrigerant was liquefied in the condenser provided with the cooling coil and supplied to the evaporator, and the evaporation heat was removed from the evaporator coil disposed in the evaporator.

In the absorption refrigeration apparatus, copper pipes having excellent heat transferability and workability are used for internal piping thereof, and stainless steel plates having excellent corrosion resistance are used for containers forming the main body of the refrigeration apparatus. In addition, a hose, such as rubber, is used for connection with the cooling tower (cooling tower) provided in parallel with the piping of the refrigerating apparatus main body.

In the configuration in which the hose is connected to the tip of the pipe which protrudes through the container wall (outer plate) made of stainless steel, the sealability of the through hole and the strength of the hose connecting portion are important from the viewpoint of durability. Conventional hose joints have been formed by nickel brazing a copper mouth piece cut into a hole formed in a stainless steel outer plate, and copper brazed a copper clasp and a copper pipe.

[Problems that the invention tries to solve]

By the way, since the hose joint of the conventional outer plate is connected by soldering, there is a problem that the joined portion cracks with time, leaks easily, and the mechanical strength is insufficient, so that durability is not sufficient.

SUMMARY OF THE INVENTION An object of the present invention is to provide a hose connecting port of an outer plate which is effective in increasing connection strength and endurance of preventing leakage, and is easy to process and weld, and which can secure hose connection.

[Means for solving the invention]

The hose connecting port of the outer plate according to the present invention forms a pipe lead-out hole in the metal outer plate of the device, draws out a tip of the metal pipe through the pipe lead-out hole inside the outer plate, and connects a hose to the tip of the pipe. As a hose connecting port of the outer plate, an outer plate welded portion joined by welding with an edge of the pipe lead-out hole, an outer fitting portion fitted around the pipe drawn out from the pipe lead-out hole, and a tip end and welded by the pipe It is characterized in that the hose is fitted around the outer fitting portion by using a metal support tube having a welded pipe portion.

In the structure of Claim 2, the said outer plate welding part is an outer edge of the flange part which covers the outer peripheral edge of the said pipe lead-out hole, It is characterized by the above-mentioned.

In the structure of Claim 3, the said pipe lead-out hole is formed in the inner side of the cylindrical part which protruded the said outer plate, and the said cylindrical part is formed in the taper shape which becomes wider toward the outer side of the said outer plate, The outer plate welded portion is folded back toward the outer fitting portion and is an outer edge of the reverse bending flange portion which is in contact with the inner side of the cylindrical portion in accordance with the tapered shape of the cylindrical portion.

In the structure of Claim 4, the said outer fitting part has an annular protrusion part for fixing a hose in the middle, It is characterized by the above-mentioned.

In the structure of Claim 5, the said outer plate and the said support pipe are made from stainless steel, the said outer plate and the said support pipe are joined by welding, the said pipe is a copper pipe, and the said copper pipe and the said support pipe are nickel It is characterized by using a welding rod.

In the structure of Claim 6, the said support pipe is press-molded and the said annular protrusion was formed by beading, It is characterized by the above-mentioned.

In the configuration of claim 7, the outer plate of the device is a container wall of the freezer body of the absorption type refrigeration apparatus, which is an airtight container containing a low pressure absorbent vapor therein, and the pipe is a circulating pipe of a liquid medium for heat exchange. It is characterized by that.

In the structure of Claim 8, the outer board of the said device is a cylindrical surface, The said pipe lead-out hole is formed in the protruding plane to the outer side formed in the said outer board, It is characterized by the above-mentioned.

[Action, effect of the invention]

In the present invention, since the support pipe is fixed to both the outer plate and the pipe by welding, the fixing strength is large and the practicality is excellent.

In the structure of Claim 2, since a flange part is simple, manufacture of a support pipe is easy.

In the structure of Claim 3, a support pipe can be easily removed from an outer plate by cutting out an outer plate welding part and a pipe welding part, and rewelding is also easy. Easily positioning the pipe lead-out hole and the support tube by simply fitting the tapered-shaped reverse bending flange portion to the tapered cylindrical portion (in the pipe lead-out hole) that increases toward the outside. do. Since the welding which melt | dissolves the edge part itself of an outer plate welding part and a pipe welding part is possible, a welding rod is not needed and the welding operation can be improved.

In the structure of Claim 4, since the annular protrusion part is formed in the middle of an outer fitting part, the connection strength of a hose and an outer fitting part becomes large.

In the structure of Claim 5, welding can be strengthened.

In the configuration of claim 6, the support tube is easy to manufacture and the elasticity of the bent annular protrusion of the support tube can absorb the expansion and contraction due to the temperature and the time-dependent deformation of the weld tube, thereby improving the durability of the welded part. Is available at.

In the configuration of claim 7, the corrosion resistance of the absorbent liquid can be effectively coped, so that trouble can be prevented from leaking from the welded portion or from leaking of the airtight container, resulting in deterioration of the freezing function.

In the structure of Claim 8, the welding work to the outer plate of a support pipe is easy, and the drawing of the copper pipe curved in the inside of the apparatus is convenient.

Embodiment of the Invention

EMBODIMENT OF THE INVENTION Hereinafter, the Example of this invention is described in detail based on drawing.

[First Embodiment]

FIG. 1 shows a hose connection port 100 for connecting the rubber hose 13 by welding the support pipe 1 to the outer plate 12 having the lead-out hole 11 of the copper pipe 1. The lead-out hole 11 is formed in the center of the circular protruding plane 14 formed in the cylindrical surface of the outer plate 12, and has a circular shape larger than the diameter of the copper pipe 10. The reason why the pipe 10 is made of copper is because copper has high thermal conductivity and good thermal efficiency.

The support pipe 1 is formed by the press working of the pipe material, and has a flange portion 15 welded to the protruding plane 14 on the outer circumferential side of the lead-out hole 11 at one end thereof, and the copper pipe 10 at the other end thereof. It has the outer fitting part 16 which fits on an outer side at the front-end | tip of the. The flange portion 15 in this embodiment has a bell-mouthed shape, and in the middle of the flange portion 15 and the outer fitting portion 16 of the support pipe 1 by the bead toward the outer circumferential side. The protruding annular protrusion 17 is formed. The tip of the copper pipe 10 is an extension 18 so as to securely engage the outer fitting portion 16.

The outer plate 12 in the present embodiment is the airtight container 50 of the condenser 5 and the airtight container 30 of the absorber 3 and the evaporator 4 in the absorption type refrigeration apparatus 200 described later. Ferrous stainless steel SUS444 is used as the outer peripheral wall. The support pipe 1 uses ferritic stainless steel, such as SUS444. The use of ferritic stainless steel without using austenitic stainless steel as a corrosion-resistant metal material is based on the reason that the residual stress due to welding is small and cracks can be prevented.

Welding to the outer plate 12 of the support pipe 1 is, as shown in FIG. 2 (a), by overlapping the flange portion 15 on the circular protruding plane 14, and in FIG. 2 (b). As shown, the TG is welded over the entire circumference (the outer edge of the flange portion 15 to be welded to the outer plate 12 corresponds to the outer plate welding portion). TIG welding is used to minimize deformation and deterioration of the welded portion. Welding of the expansion portion 18 of the tip of the copper pipe 10 to the tip of the outer fitting portion 16 of the support pipe 1 is performed along the perimeter of the TIG welding using a nickel welding rod. The tip of the outer end portion 16 joined by welding with the tip of 10) corresponds to the pipe welded portion}. This is because nickel is fused to both the ferritic stainless steel of the support pipe 1 and copper of the copper pipe 10 well.

In the present embodiment, a part of the outer plate 12 is protruded to form a circular protruding plane 14 at the top thereof, provided that the welding surface is a cylindrical surface using the outer circumferential walls of the airtight containers 30 and 50 as they are. This is because the shape of the flange portion 15 becomes complicated and the processing becomes complicated. In this case, a gap is formed between the outer plate 12 and the flange portion 15, so that leakage is likely to occur, and the welding work is complicated.

A part of the outer plate 12 protrudes outward is a heat exchanger in which the main body portion of the copper pipe 10 is wound in a coil shape, and the curved portion is bent when the main body portion is bent 90 degrees and inserted into the lead-out hole 11. Based on the reason for preventing interference at the edge of the lead-out hole 11. As shown in FIG. 1, the rubber hose 13 is fitted to the hose fitting 100 from the outside, and the tip of the rubber hose 13 is inserted so as to ride over the annular projection 17. It is fixed by the band 19.

3 shows an absorption type refrigerating device 200 employing the hose connector 100 of the outer plate 12 to which the rubber hose 13 of the present invention is connected. Cooling tower (cooling tower) (CT) is installed in the absorption refrigeration apparatus 200, and together with the indoor unit 300 constitutes a cooling / heating device. 400 denotes a control circuit of a cooling / heating device.

The absorption refrigeration apparatus 200 has a high temperature regenerator 21 and a low temperature regenerator 22, and has a regenerator 2 which separates a refrigerant (water) from a low concentration absorption liquid (lithium bromide aqueous solution). Under the high temperature regenerator 21, a gas burner b as a heating source is provided. The low temperature regenerator 22 is provided above the high temperature regenerator 21 and has a vertical cylindrical airtight container 20 made of stainless steel.

An absorber 3 is provided at an outer circumference of the low temperature regenerator 22, an evaporator 4 is provided at an outer circumference of the absorber 3, and a condenser 5 is mounted above the evaporator 4. The regenerator 2, the absorber 3, the evaporator 4 and the condenser 5 are arranged on the same axis and welded together to form the freezer body 500.

The absorber 3 arranges the cooling coil 31 wound in a vertical cylindrical shape in the inner portion of the annular hermetic container 30 provided on the outer circumference of the low temperature regenerator 22, and the cooling coil 31 on the upper side thereof. ) Is equipped with a high concentration absorbent liquid dispersion port 32 for dispersing a high concentration absorbent liquid. The bottom part of the absorber 3 and the bottom part of the high temperature regenerator 21 are connected by the absorption liquid supply path provided with the heat exchanger H and the absorption liquid pump P1.

The condenser 5 is formed by disposing the condensing coil 51 inside the outer periphery of the low temperature regenerator 22 and the annular hermetic container 50 provided above the hermetic container 30.

The upper side of the low temperature regenerator 22 is a gas-liquid separator 23, and the gas-liquid separator 23 communicates with the upper part of the condenser 5 through the gap 5A. The coolant liquid spreading port 42 provided in the lower part of the condenser 5 and the upper part of the evaporator coil 41 of the evaporator 4 is connected by the coolant liquid supply path provided with the solenoid valve V3 which has an orifice.

The cooling coil 31 is connected to the condensation coil 51 and is connected to the cooling tower CT by the circulation path L. The cooling water is cooled by the cooling water pump P2 to the cooling coil 31 by the cooling water pump P2. It is circulated in the order of the condensation coil 51 → cooling tower CT. The absorbent liquid is circulated in the order of the regenerator 2 → the absorber 3 → the absorbent liquid pump P1 → the regenerator 2.

The outer plate 12 in this embodiment is an outer peripheral wall of the hermetic container 30.50, and the copper pipe 10 is a cooling coil 31, an evaporating coil 41 and a condensing coil 51 wound in coil shapes, respectively. to be. An end of each coil is drawn out through the outer plate 12 which is a cylindrical sidewall of the airtight containers 30 and 50, and a rubber hose 13 for connecting to the cooling tower CT or the indoor unit 300 is connected. .

In this embodiment, the following effects are obtained.

1) Since the outer plate 12 and the flange portion 15 are welded by TIG and the copper pipe 10 and the outer fitting portion 16 are welded using a nickel welding rod, the welding strength is large and the sealability is excellent. Therefore, steam leakage of the refrigerant in the refrigerator main body 500 can be prevented for a long time.

2) Since the inside (inner container) of the outer plate 12 of the refrigerator main body 500 is low pressure, during the freezer operation, the external force is directly applied to the outer plate 12 from the flange portion 15 by the pressure difference between the atmospheric pressure and the inside. Is applied. Accordingly, since the external force in the direction of peeling the weld surface does not occur in the TIG welding portion, the practicality is maintained for a long time.

3) Since both TIG welding and nickel rod welding can be done outside the outer wall, the welding work is easy and the work is easy to automate.

4) Stress may be applied to the welded part due to the relative displacement between the outer plate 12 and the copper pipe 10 due to temperature change, time change, etc. at the time of operation and stop operation, but the support pipe (1) Since the annular protrusion 17 is provided and has elasticity, the stress applied to the weld surface can be reduced.

Second Embodiment

4 and 5 show a second embodiment, FIG. 4 is a cross-sectional view of the hose connector 100, and FIG. 5 is an explanatory diagram showing the attachment procedure of the hose connector 100. As shown in FIG.

In this embodiment, the flange 15 of the support pipe 1 overlaps the outer periphery of the lead-out hole 11, and the outer edge (corresponding to the outer plate welded portion) of the flange 15 is attached to the outer plate 12. An example of welding is shown. By forming in this way, the above effects can be obtained, but there are the following problems.

a1) After welding, it is difficult to remove the support pipe 1 from the outer plate 12 or perform re-welding at the time of maintenance such as maintenance.

b1) Since the flange portion 15 is formed in a bell mouse shape, the liquid (between the flange portion 15 and the protruding plane 14 formed on the outer periphery 12 of the lead-out hole 11) V) is easy to accumulate, and corrosion may occur due to this liquid.

c1) Since the welding of the flange portion 15 is carried out to the outer circumferential edge of the lead-out hole 11 (the protruding plane 14 formed on the outer plate 12), the lead-out hole 11 and the support pipe 1 It is difficult to match the axial center of the beam, that is, the positioning during welding is difficult, and it is difficult to keep the amount of overlap between the flange portion 15 and the outer circumferential edge of the lead-out hole 11 constant.

d1) Since the plane of the flange part 15 is matched with the outer peripheral edge of the lead-out hole 11 (protrusion plane 14 formed in the outer plate 12), and the outer edge of the flange part 15 is welded, Because welding rod is needed, welding workability is bad.

The second embodiment has been made to solve the above problem, and adopts the configuration shown in FIG.

That is, the lead-out hole 11 is formed inside the cylindrical part 11t formed in the taper shape which protrudes outward of the outer plate 12 (protrusion plane 14), and becomes wider toward the outer side of the outer plate 12. . In addition, in this embodiment, the taper angle of the cylindrical part 11t may be set to 60 degrees, or may be set to other angles.

In addition, the outer circumferential edge of the support pipe 1 is folded back toward the outer fitting portion 16 side, and is in reverse bending flange portion 15a which is in contact with the inner surface of the cylindrical portion 11t in conformity with the tapered shape of the cylindrical portion 11t. ) Is formed. In addition, the reverse bending flange part 15a of this embodiment is set to 60 degrees +/- 0.5 degree so that the taper angle of the cylinder part 11t may be set, but when the taper angle of the cylinder part 11t is other than 60 degree, It is set to the angle corresponding to the data angle of the part 11t.

Welding to the outer plate 12 of the support pipe 1 is performed by the outer end of the support pipe 1 at the tip of the copper pipe 10, as shown in FIG. 5 (a) and FIG. 5 (b). At the same time as fitting (16), the reverse bending flange portion 15a is fitted into the cylindrical portion 11t.

Then, the tip of the overlapped copper pipe 10 and the tip of the outer fitting portion 16 are melted using a welding machine to weld the tip of the copper pipe 10 and the tip of the outer fitting portion 16, and the copper pipe { The tip of the outer fitting portion 16 joined by welding with the tip of (10) corresponds to the pipe welding portion. The tip of the overlapping cylindrical portion 11t and the tip of the reverse bending flange portion 15a are melted to form a cylindrical portion. The tip of 11t and the tip of the reverse bending flange portion 15a are welded (the tip of the reverse bending flange portion 15a to be welded to the outer plate 12 corresponds to the outer plate welding portion).

As described above, since the support pipe 1 is fixed to both the copper pipe 10 and the outer plate 12 by welding, high fixing strength and high practicality are obtained.

Since the support pipe 1 of 2nd Example is formed as mentioned above, the following effects can be acquired.

a2) After welding, the pipe welded portion (welded portion of the tip of the copper pipe 10 and the tip of the support pipe 1) and the outer plate welded portion (welded portion of the tip of the cylindrical portion 11t and the tip of the reverse bending flange portion 15a }, The support pipe 1 can be easily detached from the outer plate 12 by cutting with a cutting machine or the like. In addition, it is possible to easily attach the support pipe 1 to the outer plate 12 to weld the two ends to each other. Therefore, maintenance property, such as maintenance, is improved compared with 1st Embodiment.

b2) Since the reverse bending flange portion 15a corresponding to the taper angle is fitted and joined inside the tapered cylindrical portion 11t, the liquid is easily between the outer plate 12 and the reverse bending flange portion 15a. It doesn't accumulate. Therefore, it is possible to suppress the possibility of corrosion occurring between the outer plate 12 and the reverse bending flange portion 15a.

c2) Positioning is performed because the shaft center of the lead-out hole 11 and the support pipe 1 coincides only by fitting the reverse bending flange portion 15a corresponding to the taper angle inside the tapered cylindrical portion 11t. Can be made very easy. Therefore, the amount of overlap between the support pipe 1 and the outer plate 12 can be kept constant at all times.

In addition, since the reverse bending flange portion 15a corresponding to the taper angle is fitted inside the tapered cylindrical portion 11t, the inner diameter of the cylindrical portion 11t and the outer diameter of the reverse bending flange portion 15a are manufactured. Even if an error occurs, the error is absorbed in the overlap amount.

d2) Since the tip of the overlapped copper pipe 10 and the tip of the outer fitting portion 16 are melted and welded, the tip of the overlapped cylindrical portion 11t and the tip of the reverse bending flange 15a are melted and welded. As a result, the welding workability is improved as compared with the first embodiment because no electrode is required.

Third Embodiment

6 is a perspective view of the outer plate showing the third embodiment.

In the third embodiment, the hose of the hermetic container 30 covering the absorber 3 and the evaporator 4 of the absorption type refrigeration apparatus 200 shown in the first embodiment is connected to the hose connector 100 shown in the second embodiment. It is applied to the connection part.

As shown in FIG. 6, the hermetic container 30 joins the semi-cylindrical outer side plate 12 and the semi-cylindrical outer side plate 12a, and the outer peripheral wall of the cylindrical hermetic container 30 is formed.

In the third embodiment, the cooling water is guided by the two rubber hoses 13 in the cooling tower CT, and the outer plate 12 forming the airtight container 30 has a drawing hole for drawing the cooling water into the inside. While two 11a) are formed, two draw holes 11b for guiding the two series of cooling water passed through the airtight container 30 to the outside are formed.

In the third embodiment, two take-out holes 11a for drawing the coolant into the inside and one take-out hole 11c for drawing the cold / hot water passing through the indoor unit 300 into the hermetic container 30 and Together, it is formed in one lower projection plane 14a. In addition, as described above, two sunrise holes 11b for discharging the cooling water to the outside together with one lead-out hole 11d for guiding the cold / hot water passing through the evaporator 4 to the indoor unit 300 are connected to one upper portion. It is formed in the projection plane 14b.

In addition, the lead-out hole 11e shown in FIG. 6 is a hole for supplying the coolant once drawn out from the condenser 5 to the evaporator 4, and this hose hole 11 of the second embodiment is also provided in this lead-out hole 11e. 100) is employed.

[Modification]

In addition, in the above-described embodiment, the present invention has been described in the case where the present invention is applied to the absorption type refrigeration apparatus 200, but the hose of the outer plate penetrates the outer plate in the main body of the apparatus to draw the metal pipe to the outside and connects the hose to the pipe. If it is a connection port, this invention can be employ | adopted in other apparatuses, such as an electric refrigeration apparatus and a vehicle refrigeration apparatus.

Claims (11)

A pipe lead-out hole 11 is formed in the metal outer plate 12 of the device, and the front end of the metal pipe 10 is drawn out through the pipe lead-out hole 11 inside the outer plate 12 and the pipe ( A hose connecting port 100 of an outer plate which connects the hose 13 to the distal end of 10), the outer plate welded portion joined by welding with the edge of the pipe lead-out hole 11, and withdrawn from the pipe lead-out hole 11. The outer fitting portion by using a metal support tube 1 having an outer fitting portion 16 fitted around the pipe 10, and a pipe welding portion joined by welding with the tip portion of the pipe 10. (16) Hose connection port of the outer plate fitting the hose (13) around. 2. The hose connector of an outer plate according to claim 1, wherein the outer plate welding portion is an outer edge of the flange portion (15) covering an outer circumferential edge of the pipe drawing hole (11). The pipe drawing hole (11) is formed inside the cylindrical portion (11t) formed by protruding the outer plate (12) outward, and the cylindrical portion (11t) is the outer plate (12). It is formed in a tapered shape that becomes wider toward the outside of the, the outer plate welding portion is folded back to the outer fitting portion 16 side, in contact with the inside of the cylindrical portion (11a) in accordance with the tapered shape of the cylindrical portion (11a). A hose connecting port for an outer plate, which is an outer edge of the reverse bending flange portion 15a. 4. The hose connector of any one of claims 1 to 3, wherein the outer fitting portion (16) has an annular protrusion (17) for fixing the hose in the middle. The outer plate 12 and the support tube 1 are made of stainless steel, and the outer plate 12 and the support tube 1 are joined by welding. Pipe (10) is a copper pipe, the copper pipe (10) and the support pipe (1) is a hose connecting port of the outer plate, characterized in that welded using a nickel welding rod. 5. The hose connecting port according to claim 4, wherein the support pipe (1) is press-molded, and the annular protrusion (17) is molded by beading. 6. The outer plate (12) of the appliance is a vessel wall of a refrigerator main body (500) of an absorption type refrigeration apparatus in an airtight container containing a low pressure absorbent vapor therein, and the pipe (10) performs heat exchange. A hose connection port of an outer plate, which is a circulating pipe of a liquid medium. 8. The device according to any one of claims 1, 2, 3, 6 and 7, wherein the outer plate 12 of the device is a cylindrical surface, and the pipe lead-out hole 11 is the outer plate 12. Hose connecting port of the outer plate, characterized in that formed in the protruding plane 14 to the outside formed in the. The said outer fitting part 16 has the annular protrusion part 17 for fixing a hose in the middle, The said outer plate 12 and the said support pipe 1 are any one of Claims 1-3. It is made of stainless steel, the outer plate 12 and the support pipe 1 is joined by welding, the pipe 10 is a copper pipe, the copper pipe 10 and the support pipe 1 is a nickel welding rod Hose connection port of the outer shell, characterized in that welded using. The outer fitting portion (16) has an annular protrusion (17) for fixing a hose in the middle thereof, and the outer plate (12) and the support pipe (1) are made of stainless steel, and the outer plate (12). ) And the support pipe 1 are joined by welding, the pipe 10 is a copper pipe, the copper pipe 10 and the support pipe 1 is welded using a nickel welding rod, Outer plate (12) is a cylindrical surface, the pipe outlet hole (11) is formed in the outer surface protruding plane (14) formed in the outer plate (12) hose connection port. 2. The outer fitting portion (16) according to claim 1, wherein the outer fitting portion (16) has an annular protrusion (17) for fixing the hose in the middle, and the support pipe (1) is press-molded, and the annular protrusion (17) is used for beading. And the pipe outlet hole (11) is formed in the outwardly projecting plane (14) formed in the outer plate (12).