WO2010150878A1

WO2010150878A1 - Heat exchanger

Info

Publication number: WO2010150878A1
Application number: PCT/JP2010/060865
Authority: WO
Inventors: 谷川茂利; 谷川章太
Original assignee: 株式会社Cku; シーアイ化成株式会社
Priority date: 2009-06-26
Filing date: 2010-06-25
Publication date: 2010-12-29
Also published as: JP4880094B2; KR20120042854A; CN102483308A; JP4880095B2; WO2010150877A1; CN102483308B; KR20120031226A; CN102483307B; WO2010150879A1; KR101279767B1; JPWO2010150879A1; CN102483307A; KR101354839B1; JPWO2010150878A1

Abstract

Disclosed is a heat exchanger which makes it possible to simplify the manufacturing process by permitting the heat transfer tube to be easily attached to the header. A method for manufacturing the heat exchanger is also provided. In the case of manufacturing the heat exchanger (1), which exchanges heat by making a fluid flow in the heat transfer tube (4) attached to the header (2), the header (2) is composed of a plurality of header units (21) and a header cover (3). Each of the header units (21) is configured such that a pair of upper and lower unit-divided bodies (22) face each other, and each of the unit-divided bodies (22) has a recessed section (28) having the shape of the halved heat transfer tube (4), and the heat transfer tube (4) is sandwiched between the recessed sections (28). Then, after soldering the bonding portions of the recessed sections using a soldering material (5), a header cover (3) is attached to the openings (27) of the stacked header units (21).

Description

Heat exchanger

The present invention relates to a heat exchanger having left and right headers and heat transfer tubes provided between the headers, and more particularly, to a heat exchanger that enables easy connection of heat transfer tubes to headers. .

FIG. 14 shows the structure of a conventional general multi-tube heat exchanger (eg, Patent Document 1). In FIG. 14, reference numeral 201 denotes a fin, which is provided in a direction perpendicular to the axial direction of the plurality of heat transfer tubes 202. In general, a plurality of fins 201 are provided at regular intervals, but only both end portions are shown in FIG. Reference numeral 202 denotes a heat transfer tube through which a fluid to be cooled is passed. Reference numeral 203 denotes headers provided at both ends of the heat transfer tube 202 so that fluid flows into the plurality of heat transfer tubes. A plurality of partition plates 204 are provided inside the header 203, the flow direction of the fluid is regulated by the partition plates 204, and the fluid flowing from one heat transfer tube 202 is allowed to flow to the other heat transfer tube 202. It is what I did.

When cooling a fluid using such a multi-tube heat exchanger, first, the fluid is caused to flow from the leftmost upper header 203 in FIG. Then, the fluid flows through the uppermost (first stage) heat transfer pipe 202 and flows to the partition space 205 of the right header 203, and then flows to the second stage heat transfer pipe 202 in the partition space 205. The fluid then flows to the second partition space 205 of the left header 203, and similarly flows while meandering the right header 203 and the left header 203. On the other hand, when air is circulated along the fins 201 provided in a direction perpendicular to the heat transfer tubes 202, heat exchange is performed between the air and the surfaces of the fins 201 and the heat transfer tubes 202. The fluid flowing inside can be cooled.

By the way, when manufacturing such a heat exchanger, generally, a pair of left and right headers and a plurality of heat transfer tubes and fins are prepared, and left and right ends of the heat transfer tubes are attached to the header. When attaching a heat transfer tube to this header, an insertion hole for passing the heat transfer tube is formed on the opposite side surfaces of the header, and the end of the heat transfer tube is inserted in the insertion hole in the axial direction. Similarly, insert the heat transfer tube into the insertion hole of the header at the opposite end, attach both ends to the insertion hole, and braze the gap between the heat transfer tube and the insertion hole. (Patent Document 2).

JP 2004-108601 A JP 2006-308144 A

However, such a method of inserting the heat transfer tube into the insertion hole of the header causes the following problems.

That is, in the conventional method of forming the insertion hole in the header and inserting the heat transfer tube, it is necessary to insert the heat transfer tube into the insertion hole. Takes time. In particular, when attaching a heat transfer tube to the header on one side and then attaching the heat transfer tube to the header on the other side, the end of the heat transfer tube is restrained by one header, so the end of all the heat transfer tubes The heat transfer tubes cannot be inserted all together unless they are aligned with the positions of the insertion holes on the opposite side.

Accordingly, the present invention has been made paying attention to the above-described problems, and an object thereof is to provide a heat exchanger and a method for manufacturing the same that can simplify a manufacturing process by easily attaching a heat transfer tube to a header. And

That is, in order to solve the above problems, the present invention provides a heat exchanger for exchanging heat through a heat transfer tube attached between a pair of headers, and dividing the header by a plane parallel to the axial surface of the heat transfer tube. A plurality of first wall surfaces having a divided surface, a recessed portion provided on the divided surface of the first wall surface and formed in contact with the outer peripheral portion of the heat transfer tube, and a heat transfer tube sandwiched between the recessed portions And a sealing material that seals the gap and the divided surfaces of the plurality of first wall surfaces.

Since the heat transfer tube can be attached and sandwiched from above the concave portion with such a configuration, the working efficiency can be significantly improved as compared with the case where the heat transfer tube is inserted into the insertion hole from the axial direction. Here, the heat transfer tube may have a circular cross section, or may have a rectangular or flat cross section. Correspondingly, the shape of the recess may be a semicircular shape or a rectangular shape.

Also, in such an invention, when the heat transfer tubes are attached to the recesses of the first wall surface, a plurality of heat transfer tubes are prepared and arranged in a line along the dividing surface.

In this way, when each heat transfer tube has a circular cross section, it can withstand high pressure, and the surface area of the heat transfer tubes arranged in a row and the outside air can be increased. As a result, the efficiency of heat exchange can be improved.

Furthermore, it is also possible to form a recess in both opposing dividing surfaces of the first wall surface and sandwich the heat transfer tube by the recess of the first wall surface.

In this way, for example, if recesses are formed in the upper and lower divided surfaces of the first wall surface, the gap between the upper and lower heat transfer tubes can be reduced and a large number of heat transfer tubes can be attached.

In addition, the same configuration can be used when heat exchange is performed using a multiple tube composed of an inner tube and an outer tube. That is, in a heat exchanger composed of two pairs of headers and a heat transfer tube composed of an inner tube and an outer tube, each of which exchanges heat through the inner tube and the outer tube, the two pairs of headers are connected to the outer tube. It comprises a pair of first headers that allow fluid to pass between the inner tubes and a pair of second headers that allow fluids to pass through the inner tubes. And said 1st header is comprised with the 1st wall surface which has the division surface divided | segmented by the surface parallel to the axial surface of the said heat exchanger tube, and the 2nd wall surface facing the said 1st wall surface, A first recess provided on the dividing surface of the wall surface and formed in contact with the outer peripheral portion of the outer tube, and a second recess formed on the dividing surface of the second wall surface and formed in contact with the outer peripheral portion of the inner tube. It comprises so that it may have a recessed part. And the clearance gap between the said 1st recessed part and an outer tube | pipe, the clearance gap between a 2nd recessed part and an inner pipe | tube, and a division surface are sealed with a sealing material.

In this way, when multiple tubes are used, not only the outer tube but also the inner tube can be sandwiched in the same way by the recess, so when inserting the outer tube or the inner tube into the insertion hole from the axial direction. Compared to this, it is possible to remarkably improve the installation work efficiency.

Further, in such an invention, the second header is formed so as to be in contact with the inner third wall surface having a divided surface divided by a plane parallel to the axial surface of the inner tube, and the outer peripheral portion of the inner tube. It comprises so that it may have a 3rd recessed part.

With this configuration, the inner pipe can be sandwiched between the upper and lower third recesses similarly for the second header, and the attachment work can be easily performed.

Further, when such a heat transfer tube is used, the heat transfer tube is configured to have two inner tubes inscribed in the outer tube, and correspondingly, the divided surface of the first wall surface and the second wall surface Are set to the same plane.

If it does in this way, the division | segmentation surface of a 1st recessed part and a 2nd recessed part can be made to correspond by making the axial surface of the outer pipe | tube of an coaxial pipe | tube, and an inner pipe | tube match, and a several inner pipe | tube is inserted | pinched simultaneously Will be able to.

According to the present invention, in a heat exchanger for exchanging heat through a heat transfer tube attached between a pair of headers, the header has a plurality of divided surfaces divided by a plane parallel to the axial surface of the heat transfer tube. A gap between the first wall surface, a concave portion provided on the dividing surface of the first wall surface and in contact with the outer peripheral portion of the heat transfer tube, and the heat transfer tubes sandwiched between the concave portions, and the plurality of first Since it is configured to have a sealing material that seals the dividing surface of the wall surface, the heat transfer tube can be attached and sandwiched from above the recess, compared to the case where the heat transfer tube is inserted from the axial direction into the insertion hole. Work efficiency can be significantly improved.

Schematic of a heat exchanger showing an embodiment of the present invention Exploded perspective view of header unit and heat transfer tube in the same form The figure which shows the state which assembled the header unit in the same form Exploded perspective view of another heat transfer tube and header unit in the same form State diagram with header cover attached to header unit in same form Diagram of overlapping header units in the same form The figure which shows the header unit in 2nd embodiment The state figure which attached the header cover to the header unit of FIG. The figure which shows the unit separation body in 3rd embodiment. Schematic which shows the heat exchanger using the coaxial pipe | tube in 4th embodiment. The disassembled perspective view which shows the header unit in 4th embodiment The figure which shows the state which covers the recessed part in other embodiment The figure which shows the coaxial pipe | tube in other embodiment Schematic diagram of a general heat exchanger in a conventional example

Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the heat exchanger 1 in this embodiment includes a plurality of heat transfer tubes 4 between the left and right headers 2. The header unit 21 is composed of a plurality of header units 21 and the header cover 3, and each header unit 21 is composed of a pair of unit separators 22 each having a recess 28 for sandwiching the heat transfer tube 4 from above and below. is there. Hereinafter, this embodiment will be described in detail. For the sake of explanation, as shown in FIG. 2, the side to which the heat transfer tube 4 is attached is the front surface (first wall surface 23), the heat transfer tube 4 extends in the rear direction, the left and right sides are the side surfaces, the upper side and the lower The sides will be described as an upper surface and a bottom surface, respectively.

The header 2 is configured to allow the fluid to be heat exchanged to flow into and out of the respective heat transfer tubes 4, and to hold the heat transfer tubes 4 arranged in a line so as to form the same plane. A unit 21 and a header cover 3 attached from the rear side in a state where the header units 21 are laminated are configured. When the fluid is introduced through the header 2, the fluid is introduced from the inlet 31 of the header cover 3 and guided to the heat transfer tube 4 through the opening 27 provided on the rear surface side of the header unit 21. To do. On the other hand, when the fluid is discharged, the fluid that has been heat exchanged by the heat transfer tube 4 is guided to the rear end side of the header unit 21 and is discharged from the discharge port 32 through the gap space S with the header cover 3. To do.

As shown in FIGS. 2 and 3, the header unit 21 constituting such a header 2 is configured with a pair of unit separators 22 facing each other vertically. The unit separator 22 is provided with a plurality of recesses 28 on a first wall surface 23 on which the heat transfer tube 4 is attached, and left and right side surfaces 24 and a bottom surface 25 are provided so as to continue from there, and the rear surface side is opened. Opening 27 is formed. The first wall surface 23 is divided by a dividing surface 20 parallel to the axial surface of the heat transfer tube 4, and a plurality of recesses 28 are formed on the dividing surface 20. The dividing surface 20 is divided by a plane parallel to the axial surface of the heat transfer tube 4, and the concave portion 28 has a shape that halves the outer shape of the heat transfer tube 4. In FIGS. 2 and 3, since the heat transfer tube 4 is circular, the shape of the recess 28 is also semicircular. However, when using a flat heat transfer tube 4 as shown in FIG. A semi-flat shape in which the lower half of the heat transfer tube 4 is divided in half can also be used. The recesses 28 formed in such a shape are provided at positions that are symmetrical with respect to the first wall surface 23, so that the unit separators 22 are turned upside down and the opening portions of the respective recesses 28 are opened. Even when 29 is opposed, the respective opening portions 29 are aligned so that the heat transfer tubes 4 can be sandwiched.

On the other hand, as shown in FIG. 1, the header cover 3 attached from the rear surface side of the header unit 21 is configured to include an inflow port 31 through which a fluid flows and a discharge port 32 through which the fluid is discharged. Are branched into each header unit 21 and introduced (or discharged) to be led to the heat transfer tube 4. As shown in FIG. 5, the header cover 3 is attached so as to cover the stacked header units 21, and a gap space S is formed in the opening 27 on the rear surface side of the header unit 21. The fluid is allowed to flow into the header unit 21.

The heat transfer pipe 4 having high thermal conductivity is attached to the header 2 configured in this way. The heat transfer tube 4 is made of metal or the like, and has an outer diameter of 0.8 mm to 2.0 mm, preferably 0.9 mm to 1.5 mm, and an inner diameter of 0.7 mm to 1.9 mm. The cross-sectional circle is preferably about 0.8 mm to 1.4 mm. When the heat transfer tube 4 is attached to the header 2, the brazing material 5 or the like is used as a joining medium, and this is melted to fill the gap with the concave portion 28 of the header 2.

Next, the case where the heat exchanger 1 configured as described above is manufactured will be described. When manufacturing this heat exchanger 1, first, the unit separator 22 is arranged so that the concave portion 28 faces upward, and in that state, the heat transfer tube 4 is attached from the open portion 29 of the concave portion 28. When the heat transfer tubes 4 are attached to the recesses 28, the plurality of heat transfer tubes 4 are dropped so as to roll on the unit separator 22, and the heat transfer tubes 4 other than the heat transfer tubes 4 dropped into the recesses 28 are removed and attached. And after attaching the heat exchanger tube 4 in this way, after adjusting the position of the edge part of the heat exchanger tube 4, the unit separator 22 turned upside down is covered from above, and the concave portion 28 of the upper and lower unit separators 22 is covered. The heat transfer tube 4 is sandwiched. Then, the dividing surfaces 20 of the upper and lower unit separators 22 and the gaps between the heat transfer tubes 4 and the recesses 28 are brazed with the brazing material 5.

Hereinafter, similarly, a plurality of header units 21 to which the heat transfer tubes 4 are attached are provided, and these are stacked in the vertical direction. At this time, the rear surface side of the header unit 21 is in an open state, the header cover 3 is attached from the rear surface side, and the gap space S is formed on the rear surface side of the header unit 21. After the header cover 3 is attached in this way, the joint portion between the header cover 3 and the header unit 21 is brazed so that the fluid does not leak outside.

The operation when using the heat exchanger 1 configured as described above will be described.

First, when a fluid is introduced from the inlet 31 of one header 2, the fluid flows into the gap space S between the header cover 3 and the header unit 21, and then branches to each header unit 21. It will flow to 4. At this time, the fluid is exchanged with other fluid flowing in the outer peripheral portion of the heat transfer tube 4, and is discharged from the header unit 21 on the opposite side in a state where the heat exchange is performed. And it discharges | emits from the discharge port 32 of the header cover 3 through the clearance space S of the rear surface side of the header unit 21. FIG.

As described above, according to the above-described embodiment, the plurality of unit separators 22 having the recesses 28 are vertically opposed to sandwich the heat transfer tube 4, so that the heat transfer tube 4 is inserted in the axial direction as in the prior art. Compared to the case, the installation work can be greatly simplified.

In the first embodiment, the unit separators 22 having the same shape are vertically opposed to each other. However, when the welding allowance during brazing is reduced, as shown in FIG. The unit separator 22 may be configured to be slightly small, and the first wall surface 23 and the side surface 24 may be overlapped and brazed. At this time, if the header cover 3 is to be attached to the header unit 21, a gap is generated between the small unit separator 22 (upper unit separator 22 in FIG. 6) and the header cover 3. The gap may be sealed using a brazing material 5 or a metal plate.

Next, a second embodiment of the present invention will be described with reference to FIGS. In the first embodiment, the rear surface side of the header unit 21 is opened and fluid is allowed to pass therethrough. However, in the second embodiment, the side surface side of the header unit 21 is opened, The fluid is made to pass there.

The configuration of the header unit 21 and the header cover 3 in this embodiment will be described with reference to FIGS. As in the first embodiment, the header unit 21 is configured by facing a pair of unit separators 22, and each unit separator 22 is made to correspond to the shape of the heat transfer tube 4. In addition, a half-divided concave portion 28, a rear surface 26 facing the first wall surface 23 having the concave portion 28, and a bottom surface 25 are provided so as to form an upward U-shape as a whole. And when opening the upper surface side and the side surface side and attaching the header cover 3, like the first embodiment, the heat transfer tube 4 is sandwiched between the pair of unit separators 22 and laminated in a brazed state. I will do it. Next, the header cover 3 is attached and brazed to the opening 27 of the header unit 21 stacked in this manner so as to have a gap space S.

Even in the case of such a configuration, the heat transfer tube 4 is sandwiched between the pair of half-separated unit separators 22, so that the heat transfer tube 4 is inserted in the axial direction as in the conventional case. The mounting operation can be greatly simplified.

In addition, in this embodiment, what attached | subjected the same code | symbol as 1st Embodiment shall have the same structure as 1st Embodiment.

Next, a third embodiment of the present invention will be described with reference to FIG. In the above embodiment, the concave portion 28 is provided on the upper side portion of the first wall surface 23 of the unit separator 22. However, in this embodiment, the concave portion 28 is provided on the upper side portion and the lower side portion of the first wall surface 23. It is a thing.

The unit separator 22 has a first wall surface 23 and both side surfaces 24, and a bottom surface 25 is provided at the center of the upper and lower sides of these wall surfaces. The upper surface side, the lower surface side, and the rear surface side are opened. It is what I did. Then, a recess 28 is formed on the split surface 20 of the first wall surface 23 by dividing the heat transfer tube 4 in half parallel to the axial surface, and a recess 28 having the same shape is provided on the lower split surface 20. When the same unit separators 22 are stacked, the outer peripheral portions of the heat transfer tubes 4 are sandwiched and held by the respective recesses 28.

Even in such a case, since the heat transfer tube 4 is sandwiched between the recessed portions 28 of the pair of half-separated unit separators 22, when the heat transfer tube 4 is inserted in the axial direction as in the prior art. Compared to this, the installation work can be greatly simplified.

In addition, in this embodiment, when the unit separators 22 are stacked, the number of the bottom surfaces 25 in the vertical direction is reduced, so that the thickness in the vertical direction can be reduced. The gap can be reduced.

Next, a fourth embodiment of the present invention will be described with reference to FIGS. In the first embodiment and the second embodiment, the heat transfer tube 4 as a single tube is attached to the recess of the unit separator 22, but in the fourth embodiment, the inner tube The heat transfer tube 4 having 41 and an outer tube 42 is attached to the recess 28 of the header 2. In this embodiment, as shown in FIG. 11, the two inner pipes 41 are inscribed in the outer pipe 42, so that the inner pipe 41 is expanded by the outer pipe 42 even when the inner pipe 41 is inflated at a high pressure. Can be prevented, and the respective axial surfaces are made to coincide with each other.

First, the effect of heat exchange using the heat transfer tube 4 having the inner tube 41 and the outer tube 42 will be described with reference to FIG. 10. First, when the heat exchanger 1 is used, the inlet 31a is used. From the first header 2a, the first fluid to be heat exchanged is introduced. At the same time, the second fluid is introduced from the inlet 31b of the second header 2b. Then, the first fluid flowing in from the inflow port 31a passes through the gap between the outer tube 42 and the inner tube 41, while the second fluid flowing in from the inflow port 31b passes through the inner tube 41 and reaches the middle on the way. Exchange heat with one fluid. When heat exchange is performed using such a heat transfer tube 4, conversely, the fluid to be heat exchanged is passed through the inner tube 41 and another fluid passed between the outer tubes 42. Alternatively, the fluid to be heat exchanged may be passed through a ring-shaped gap between the inner tube 41 and the outer tube 42, and the fluid passing through the inner tube 41 and the outside of the outer tube 42 may be passed through. You may make it heat-exchange with the fluid which passes.

When the heat transfer tube 4 is attached to the header of the heat exchanger 1 using such a heat transfer tube 4, the first header 2 a that allows the first fluid to flow between the inner tube 41 and the outer tube 42, and the inner tube 41. The second header 2b for allowing the second fluid to flow only inside is provided.

The configuration of the heat exchanger 1 will be described in detail. As shown in FIG. 11, the unit separator 22 of the first header 2a of the heat exchanger 1 has a first recess 28a in which the outer tube 42 is divided in half. And a second wall surface (rear surface 26) having a second recess 28b in which the outer shape of the inner tube 41 is halved, and one side surface is opened. At this time, the split surface 20 of the first recess 28a and the split surface 20 of the second recess 28b can be formed in the same plane because the axial surfaces of all the tubes are aligned. As in the above embodiment, the pair of unit separators 22 are opposed to each other in the upside down direction, and the outer periphery of the outer tube 42 is sandwiched by the first recess 28a, and the inner tube 41 is sandwiched by the second recess 28b. Make it. Thereby, the first fluid can be passed through the gap between the outer tube 42 and the inner tube 41 through the header unit 21a of the first header 2a.

The header cover 3 is attached to the header unit 21a configured as described above. In this embodiment, since the outer tube 42 and the inner tube 41 protrude from the first wall surface 23 and the rear surface 26 of the header unit 21a, the header cover 3 cannot be attached from the rear surface side. Therefore, the header unit 21 a of the first header 2 a is formed with an opening 27 on the side surface side, and the header cover 3 is attached so as to have a predetermined gap space S from the opening 27. About this header cover 3, as shown in FIG. 8 which is 2nd embodiment, it may be attached only to either one of the left and right side surfaces, or may be attached to both side surfaces.

On the other hand, the unit separator 22 of the second header 2b is configured in the same manner as in the first embodiment (FIG. 2) and the second embodiment (FIG. 7). Since the heat transfer tube 4 does not protrude from the rear surface 26 side of the unit separator 22 of the second header 2b, the header cover 3 can be attached from the rear surface side as in the first embodiment. Or you may attach the header cover 3 to the side surface similarly to the header cover 3 attached to the 1st header 2a. In FIG. 10, the state which attached the header cover 3 to the side surface 24 of the 2nd header 2b is shown. In relation to the present invention, for the unit separator 22 of the second header 2b, the wall surface on the side where the inner tube 41 is attached is the third wall surface, and the wall surface facing this in the axial direction is the fourth wall surface ( Rear side).

When manufacturing the heat exchanger 1 configured as described above, the header units of the first header 2a and the second header 2b are arranged on the left and right sides, and the heat transfer tubes 4 are attached to the recesses 28a and 28b in this state. . At this time, the outer pipe 42 is inserted into the concave portion 28a of the first wall surface 23 of the first header 2a, and the inner pipe 41 protruding from the outer pipe 42 is provided with the concave portion 28b and the second header 2b provided on the rear surface 26. And is also inserted into a recess provided on the third wall surface of the second header 2b. Then, with the coaxial heat transfer tube 4 attached in this manner, the other unit separator 22 is covered from the upper surface side, and the outer tube 42 and the inner tube 41 are sandwiched from above and below by the concave portions 28a and 28b facing each other. Then, the joint portion is brazed in such a state that the heat transfer tube 4 is sandwiched in this manner to seal the gap, and a plurality of the header units 21 thus brazed are stacked in the vertical direction, and the first header 2a and The header cover 3 is attached to the side surface 24 of the second header 2b.

In this way, even when the heat transfer tube 4 composed of the inner tube 41 and the outer tube 42 is attached to the header 2, it is not necessary to insert the heat transfer tube 4 in alignment with the insertion hole as in the conventional case. The heat transfer tube 4 can be attached to the header 2 very efficiently.

Note that the present invention is not limited to the above-described embodiment, and can be implemented in various modes.

For example, in the above embodiment, the pair of unit separators 22 are vertically opposed to sandwich the heat transfer tube 4, but as shown in FIG. 12, a U-shaped recess 28 is provided to provide the heat transfer tube 4. In addition, a single plate material 210 having a rectangular shape may be attached to a portion where the concave portion 28 is opened.

In the above embodiment, the heat transfer tube 4 is sandwiched from above and below by the pair of unit separators 22. However, the present invention is not limited to this, and the gap after the heat transfer tube 4 is attached is filled with only the brazing material 5. The heat transfer tube 4 may be held.

Furthermore, in the above embodiment, when the coaxial heat transfer tube 4 is used, a circular tube is used as the outer tube 42. However, for example, a tube having a rectangular cross section as shown in FIG. 13 may be used. In particular, when the outer tube 42 having a rectangular cross section is used as described above, when the two inner tubes 41 are inscribed, the wall with the outer tube 42 and the adjacent inner tube 41 can be supported at three points. The inner tube 41 can be held in the outer tube 42 in a stable state. The outer tube 42 having a rectangular cross section preferably has a dimension of one side of the outer shape of 0.8 mm to 2.0 mm and a thickness of about 0.05 mm to 0.15 mm.

DESCRIPTION OF SYMBOLS 1 ... Heat exchanger 2 ... Header 2a ... 1st header 2b ... 2nd header 21 ... Header unit 22 ... Unit separation body 23 ... 1st wall surface 24 ... Side 25 ... Bottom 26 ... Rear 26a ... Second wall 27 ... Opening S ... Clearance space 28, 28a, 28b ... Recess 29 ... Opening 3 ... Header Cover 31 ... Inlet 32 ... Discharge port 4 ... Heat transfer tube 41 ... Inner tube 42 ... Outer tube 5 ... Brazing material

Claims

In a heat exchanger for exchanging heat through a heat transfer tube attached between a pair of headers,
The header
A plurality of first wall surfaces having a divided surface divided by a plane parallel to the axial surface of the heat transfer tube;
A concave portion provided on the dividing surface of the first wall surface and formed to contact the outer peripheral portion of the heat transfer tube;
A sealing material that seals the gap between the heat transfer tubes sandwiched between the recesses and the divided surfaces of the plurality of first wall surfaces;
It is comprised so that it may have. The heat exchanger characterized by the above-mentioned.
In a heat exchanger for exchanging heat through a heat transfer tube attached between a pair of headers,
The header
A plurality of first wall surfaces having a divided surface divided by a plane parallel to the axial surface of the heat transfer tube;
A plurality of recesses provided in a row along the dividing surface of the first wall surface, and formed so as to be in contact with the outer peripheral portion of the heat transfer tube;
A sealing material that seals the gap between the heat transfer tubes sandwiched between the recesses and the divided surfaces of the plurality of first wall surfaces;
It is comprised so that it may have. The heat exchanger characterized by the above-mentioned.
In a heat exchanger for exchanging heat through a heat transfer tube attached between a pair of headers,
The header
A plurality of first wall surfaces having a divided surface divided by a plane parallel to the axial surface of the heat transfer tube;
A plurality of recesses provided on both split surfaces of the first wall surface and formed so as to be in contact with the outer peripheral portion of the heat transfer tube;
A sealing material that seals the gap between the heat transfer tubes sandwiched between the recesses and the divided surfaces of the plurality of first wall surfaces;
It is comprised so that it may have. The heat exchanger characterized by the above-mentioned.
In a heat exchanger that consists of two pairs of headers and a heat transfer tube composed of an inner tube and an outer tube, and heat exchanges the fluid through the inner tube and the outer tube,
The two pairs of headers,
A pair of first headers that allow fluid to pass between the outer pipe and the inner pipe, and a pair of second headers that allow fluid to pass through the inner pipe,
The first header,
A first wall surface having a split surface divided by a plane parallel to the axial surface of the heat transfer tube, and a second wall surface facing the first wall surface, provided on the split surface of the first wall surface, A first concave portion formed so as to be in contact with the outer peripheral portion of the outer tube and a second concave portion provided on the dividing surface of the second wall surface and formed so as to be in contact with the outer peripheral portion of the inner tube are configured. With
A heat exchanger comprising a sealing material for sealing the gap between the first recess and the outer tube, the gap between the second recess and the inner tube, and the dividing surface.
The second header is provided on a third wall surface having a divided surface divided by a plane parallel to the axial surface of the inner tube, and formed on the divided surface of the third wall surface so as to be in contact with the outer peripheral portion of the inner tube. And having a third recessed portion formed,
The heat exchanger according to claim 4, wherein the heat exchanger is configured to have a sealing material that seals a gap between the third concave portion and the inner tube and a divided surface.
The heat transfer tube is configured to have two inner tubes that are inscribed in the outer tube, and an axial surface of the outer tube, an axial surface of the inner tube, a divided surface of the first wall surface, and a divided surface of the second wall surface The heat exchanger according to claim 4, characterized in that they are on the same plane.