KR19980064015A - heat transmitter - Google Patents

Abstract

As for the heat exchanger which concerns on this invention, the meander tube formed in meandering shape by the parallel straight pipe | pipe part and the curved pipe | tube part which connects the edge part of an adjacent straight pipe | tube part is arranged in parallel in multiple planes. The end of the meander tube is connected in communication with the hollow header, and a pin is disposed between the straight portions of the meander tube. If necessary, a windshield member is provided which prevents air passing through the air distribution section including the fin from passing through the air gap.

Description

heat transmitter

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The present invention relates to a heat exchanger used in an outdoor heat exchanger for a room air conditioner, a condenser for a car cooler, and the like.

In addition, in this specification, the term aluminum is used by the meaning containing the alloy.

Recently, as a heat exchanger used for an outdoor heat exchanger for a room air conditioner, a condenser for a car cooler, etc., a heat exchanger of a multiflow type, i.e., one header on the upper, lower, left, or right side, is used instead of the conventional general serpentine type heat exchanger. The heat exchanger of the type which arrange | positions and connects both ends in communication state between these headers, arrange | positions several linear tubes in parallel, and arrange | positions the corrugated fin between the adjacent tubes is popular.

However, the multi-flow type heat exchanger has excellent features such as ease of manufacture, freedom of design, and high heat exchanger efficiency. However, as shown in FIG. 15, both ends of a plurality of tubes 91 exist in each header. Since it is necessary to connect to (81) in a communication state, the number of assembly parts points and the number of points at the time of lead increase, which is cumbersome, and also contributed to the increase of manufacturing cost.

It is therefore an object of the present invention to provide a heat exchanger capable of reducing manufacturing costs by reducing the number of assembly parts and soldering points while taking advantage of a multi-flow type heat exchanger.

In order to achieve the above object, in the heat exchanger of the present invention, a plurality of meandering tubes formed in a meandering shape by parallel curved pipe portions and curved pipe portions connecting end portions of adjacent straight pipe portions are arranged in parallel in the same plane. The end of is connected in communication with a hollow header, The pin is arrange | positioned between the straight pipe parts of the said meandering tube, It is characterized by the above-mentioned.

According to the above structure, one meandering tube corresponds to a plurality of linear tubes of the multiflow type heat exchanger, and the number of parts and the joining position of the tube and the header are at least smaller than those of the multiflow type heat exchanger, thereby reducing the manufacturing cost. We can plan.

The heat exchanger may be formed in a region near the header of the meandering tube of the meandering tube, in which an air gap without a fin is formed, and a wind-proof member for preventing heat exchange air from passing through the air gap is provided. good.

According to this, since the fin cannot be disposed in the curved tube portion of the meandering tube, even when a void portion is formed in the region near the header, the air gap member is shielded by the windshield member to prevent the heat exchanger from concentrating on the region. You can do it.

Therefore, the amount of air for heat exchange through which the air distribution part including fins can be secured sufficiently and can be effectively provided to the heat exchanger, so that the performance of the heat exchanger according to the present invention, in particular, the heat exchange efficiency can be further increased. Can be.

Other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments.

Fig. 1A is a front view showing a part of the multi serpentine type heat exchanger according to the first embodiment of the present invention in a cutaway manner;

Fig. 1B is a side view of a part of the far serpentine type heat exchanger according to the first embodiment of the present invention, cut away and partially;

FIG. 2A is a cross-sectional view showing the positional relationship between a header, a meander tube, and a windshield member of the heat exchanger shown in FIG. 1; FIG.

FIG. 2B is a front view showing the positional relationship between the header of the heat exchanger shown in FIG. 1, a meandering tube, and a windshield member; FIG.

3 is a cross-sectional perspective view showing a meandering tube and a header of the heat exchanger shown in FIG. 1 in a separated state;

4A is a sectional view of principal parts of a heat exchanger according to a second embodiment of the present invention;

4B is a front view of main parts of the heat exchanger according to the second embodiment of the present invention;

5 is a cross-sectional perspective view showing the meander tube and the header of the heat exchanger shown in FIG. 4 in a separated state;

Fig. 6A is a front view showing a part of the multi serpentine type heat exchanger according to the third embodiment of the present invention in a cutaway manner;

Fig. 6B is a side view showing a part of the multi serpentine type heat exchanger according to the third embodiment of the present invention in a cutaway manner;

7 is a front view of main parts of the heat exchanger shown in FIG. 6;

8 is a view showing a flow of a heat exchange medium in the heat exchanger in FIG.

9A is a sectional view showing the principal parts of a heat exchanger according to a fourth embodiment of the present invention;

9B is a front view of main parts of the heat exchanger according to the fourth embodiment of the present invention;

10 is a cross-sectional perspective view showing a meandering tube, a header, and a windshield of the heat exchanger illustrated in FIG. 9 in a separated state;

FIG. 11 is a longitudinal cross-sectional view showing a bonding state of a tube, a fin, and a header in the heat exchanger shown in FIG. 9;

12 is a heat exchanger according to a fifth embodiment of the present invention, and is a longitudinal sectional view showing a joining state of a tube, a fin, and a header;

13 is a sectional perspective view showing a tube and a header of a heat exchanger according to a sixth embodiment of the present invention in a separated state;

FIG. 14A is a cross-sectional perspective view of the heat exchanger illustrated in FIG. 13 by separating the tube and the fin; FIG.

14B is an enlarged cross sectional view of one plate pin;

FIG. 15 is a front view showing a part of a conventional multiflow type heat exchanger; FIG.

Next, this invention is demonstrated based on embodiment which applied the outdoor heat exchanger for room air conditioners made from aluminum. In addition, it is needless to say that the present invention is not limited to the outdoor heat exchanger for the room air conditioner, but is widely applicable to various heat exchangers.

1 to 3 show the first embodiment. In the outdoor heat exchanger for a room air conditioner shown in these figures, (1a) and (1b) are headers installed in parallel in a pair of left and right, (2) is a windshield member integrally installed in the headers (1a) and (1b), (3) has a curved pipe portion 31 connecting the parallel straight pipe portion 32 and the end portion of the adjacent straight pipe portion 32 to meander between the headers 1a and 1b so that the end thereof is the header 1a. The meandering tube connected in communication with (1b) and (4) are corrugated fins joined between the meandering tubes 3. In addition, (A) is a space | gap part of the header 1a, 1b vicinity which the said pin 4 is not arrange | positioned.

The headers (1a) and (1b) are pipe-like members in which tubular shapes in which rectangular opposed long walls swell each other have a cross section, and the hollow portion also has a cross-sectional tubular shape having a shape similar to the external shape. In addition, the planar walls 11 and 11 which are opposed to the headers 1a and 1b in parallel to each other have a windscreen member (described later) in a shape in which the planar walls 11 and 11 extend in one width direction. 2) (2) protrudes in parallel. Further, tube insertion holes 13 are formed in the curved wall 12 of the headers 1a and 1b narrowed by the windshield members 2 and 2 at intervals along the longitudinal direction.

The two windscreen members 2 and 2 are provided one over the entire length of the header 1a and 1b, and the space | interval is made substantially the same as the width | variety of the meander tube 3 mentioned later. In addition, the protrusion width of the wind-shield member 2 is set to the value which can cover the space | gap part A near the header 1a, 1b in which the corrugated fin 4 is not arrange | positioned.

Moreover, the rectangular cutout part 21 is provided in the windscreen member 2 and 2 in the part corresponding to the said tube insertion hole 13 provided in each header 1a, 1b. This is provided to meander the meander tube 3 and the header 1a, 1b which will be described later, and the meander tube inserted into the tube insertion hole 13 by inserting the torch in the cutout 21. 3) It consists of soldering the edge part and the header 1a, 1b.

The cutouts 21 may be provided only on one side of the windshield members 2 and 2 protruding into the headers 1a and 1b by the shape of torch soldering. In addition, in the case of spraying a brazing material on the headers 1a and 1b or brazing by a heating furnace via a brazing material sheet, the cutouts 21 may not be provided.

The headers 1a and 1b and the windshield are preferably manufactured integrally by extrusion processing in terms of ease of manufacture and cost, and in this embodiment, those made of extruded shape members are used.

The meandering tube 3 is a member obtained by bending two rounded flat tubes to meander, and includes five straight pipe portions 32 arranged in parallel in the thickness direction of the tube, and end portions of adjacent straight pipe portions 32. It consists of four curved pipe | tube parts 31 which combine and make a series. In addition, the tube 3 is a so-called aluminum harmonica tube which is manufactured by extrusion processing and whose inside is partitioned into a plurality of rooms by partition walls to increase heat transfer performance and pressure resistance performance.

The meandering tube 3 is placed in plural in the thickness direction of the straight pipe portion 32 in the same plane so that the straight pipe portions of each tube are parallel to each other, and both ends thereof are inserted into the tubes of the headers 1a and 1b. It is inserted into the ball 13, and is connected to the header 1a, 1b in communication state, respectively. In addition, a partition is not provided inside the headers 1a and 1b. Therefore, the refrigerant flows through each meander tube a from one header 1a to the other header 1b. It is comprised by the so-called 1-pad heat exchanger which does not return to). Further, the curved portion 31 of the meander tube 3 abuts the curved wall 12 of the headers 1a and 1b with the end of the meander tube 3 inserted into the tube insertion hole 13. consist of.

In addition, in this embodiment, the linear extruded shape member is curved to form the meandering tube 3. However, the encapsulation tube or the like may be curved to form the meandering tube 3.

The corrugated fin 4 is formed by forming a corrugated aluminum sheet having a width substantially the same as the width of the meander tube 3 so as to have a height substantially equal to the distance between the straight pipe portions 32 of the meander tube 3. The louver is formed on the surface.

The corrugated fin 4 is interposed between adjacent straight pipe portions 32 of the meandering tube 3, joined to each straight pipe portion 32, and the pins between adjacent straight pipe portions 32. An air distribution part including (4) is formed.

In addition, in the case of this embodiment, since the corrugated fin 4 is formed uniformly at the same height as the space | interval of the adjacent straight pipe | tube part 32, the curved pipe | tube part 32 narrower than the space | interval of the said straight pipe | tube 32 is shown. ), And the corrugated fin (4) cannot be interposed between the adjacent curved pipe portions 32 that are wider than the gap, and between the curved pipe portions 32 and the ends of the meandering tube 3. Therefore, the space | gap part A in which the corrugated fin 4 is not arrange | positioned in the said part, ie, the header 1a, 1b, is formed.

In addition, in FIGS. 1-3, (5a) (5b) is joined to the circumferential wall of the header (1a) (1b) in the state of communication, and heat for flowing in and out of a heat exchange medium to the header (1a) (1b). Exchange media inlet and outlet. Reference numeral 14 is an object provided to close the openings at both ends of the headers 1a and 1b.

And the heat exchanger shown to FIGS. 1-3 is manufactured as follows.

First, each heat exchanger component is manufactured.

The header 1a, 1b and the windshield member 2 are integrally manufactured by extrusion processing of aluminum material. After the extrusion process, the tube is cut into a predetermined length, and the tube insertion hole 13 is provided in the curved wall 11 of the headers 1a and 1b, and the windshield member 2 corresponding to the tube insertion hole 13 is provided. The notch 21 is provided in the part of (2).

The meandering tube 3 manufactures an aluminum harmonica tube by extrusion processing, cuts it to a predetermined length, and then binds five straight pipe portions 32 arranged in parallel and ends of adjacent straight pipe portions 32. The two reciprocating half bends are manufactured so that it may be comprised by the curved part 32.

The corrugated fin 4 is cut into a louver on an aluminum sheet having a width approximately equal to the width of the meander tube 3, and formed into a wave shape so as to be almost the same height as the gap between the straight pipe portions 32 of the meander tube 3. After that, it is manufactured by cutting to have substantially the same length as the straight pipe portion 32 of the meander tube.

Next, each end of the meander tube 3 is inserted into the tube insertion hole 13 provided in the header 1a, 1b. Here, the plurality of meandering tubes 3 are arranged in the same plane at predetermined intervals so that the straight pipe portions 32 are parallel to each other, and the curved portion 31 of the meandering tube 3 is in contact with the curved wall 12. To be excreted. Thus, by making the curved pipe part 31 abut on the peripheral surface of a header, the intensity | strength of the whole heat exchanger can be improved compared with the case where it is separated.

At the cutout portion 21 provided on the windshield member 2, the end of the meandering tube 3 and the header 1a and 1b of the fitted state are soldered by a torch, and the meandering tube 3 and the header ( 1a) and 1b are joined in a communication state.

The heat exchange medium inlet pipes 5a and 5b and the lid 14 are joined to the headers 1a and 1b.

Next, the corrugated fin 4 is disposed between adjacent straight pipe portions 32 of the meandering tube 3, and the meandering tube 3 and the corrugated fin 4 are formed by a zinc chloride reaction brazing method. Etc. are bonded together to obtain a heat exchanger according to this embodiment. This zinc chloride reaction brazing method eliminates the need for using brazing methods and other expensive materials such as aluminum brazing sheets. Moreover, since the reaction temperature is low, there is no melting of the torch soldered parts or deformation of the product. Moreover, since zinc is coated on the surface, since corrosion resistance can be provided, it is preferable.

In addition, the joining method of each structural member is not limited to the said method, but each structural member may be soldered collectively using a brazing sheet, a thermal spray brazing material, a brazing filler metal sheet, etc. You may join by combining torch soldering etc. suitably.

The heat exchanger according to the present embodiment has a smaller number of tubes (meander tubes) and fewer joining positions between the tube and the header than the multi-flow type heat exchanger, so that the assembly work and the joining work can be simplified, and the manufacturing cost can be reduced. Etc. can be planned. In addition, the passing distance in the tube of the heat exchanger medium may be adjusted by changing the meandering frequency.

In the heat exchanger manufactured as described above, the heat exchange medium flowing from the heat exchange medium inlet pipe 5a to the one header 1a flows into each meandering tube 3 connected to the header 1a. After flowing meandering along each meandering tube 3, it reaches the other header 1b and flows out of the apparatus from the heat exchange medium outlet pipe 5b. Then, the air flow section including the fin 4 formed between the straight pipe portions 32 of the meander tube 3 while the heat exchange medium flows through each meander tube 3 of the tube 3 indicated by an arrow W. Heat exchange with the air for heat exchange which flows in the width direction is performed.

In the vicinity of the headers 1a and 1b where the curved portion 31 of the meandering tube 3 is present, in other words, the cavity A in which the corrugated plate 4 is not disposed is a windshield member. It is covered by (2), and it can prevent that the said heat exchange air concentrates in the space | gap part A. FIG. Therefore, since the amount of air circulated in the air distribution unit can be sufficiently secured, the heat exchange efficiency can be further improved.

4 and 5 show a second embodiment of the present invention. In addition, in embodiment shown below, the same code | symbol is attached | subjected to the same component as 1st embodiment shown in FIGS. 1-3, and it demonstrates centering around difference.

In the second embodiment shown in FIGS. 4 and 5, the windshield member 2 protrudes only on one side of the headers 1a and 1b, and the air gap portion (2) is formed by one windshield member 2. A) shielding. In the case of this embodiment, since the torch can be soldered from the side which is not provided with the windshield member 2 of the header 1a, 1b, the notch 21 does not need to be provided in particular. Moreover, in this embodiment, the strip | belt-shaped bracket 6 is integrally provided over the full length of the header 1a, 1b, and is formed in the form which protruded on the opposite side to the said windscreen member 2. As shown in FIG. The bracket 6 is a member for attaching the heat exchanger to a body or a vehicle body of a cooler, and a ball 61 for screwing the vehicle body or the like is formed at equal intervals. In addition, the header shown in Fig. 4 is also made of an extruded aluminum shape.

6 to 8 show a third embodiment of the present invention. In this embodiment, the plate-shaped partition portion 16 partitioning the inside of the header in the longitudinal direction is provided at a position about 1/4 from below the longitudinal direction of one header 1a, and the partition portion On the lower side at (16), the connection between the meander tube 3 and the headers 1a and 1b is set such that the meandering direction of the meandering tube 3 is opposite to the upper side by the partition portion 16. have. The heat exchange medium outlet pipe 5b is connected to the other end side peripheral surface in the longitudinal direction of the header 1a to which the heat exchange medium inlet pipe 5a is connected. Due to the presence of the partition portion 16 as described above, the heat exchange medium passage formed by the plurality of meandering tubes 3, as shown in FIG. It is divided into B) and the outlet side passage group C which is located lower than the partition part 16, and has fewer tubes than the inlet side passage group B. As shown in FIG.

In addition, the other structure is the same as the heat exchanger which concerns on 1st Embodiment shown in FIGS. In the heat exchanger which concerns on 3rd Embodiment shown in FIGS. 6-8, in the heat exchanger, the heat exchange medium which flowed in into the one header 1a from the heat exchange medium inlet pipe 5a is the inlet side passage group B After entering the other header (1b) through each meandering tube (3) constituting the), through the tube (3) constituting the outlet side passage group (C) again into one of the header (1a) And flows out of the mechanism from the refrigerant outlet pipe 5b.

Thus, by setting the partition part 16, the heat exchange medium flows meandering between both the headers 1a and 1b in addition to flowing each meandering tube 3 in a meandering phase, thereby increasing the heat exchange efficiency. can do.

9 to 11 show a fourth embodiment. In this embodiment, the wind-shield member 2 obtained by forming the wind-shield member 2 and the headers 1a and 1b as separate members and forming the sheet-shaped member into a U-shaped cross section has a circular cross-section. It joins to the header 1a (1b) in a forge state, and it shields the space | gap A near the header 1a (1b) in which the colgate pin 4 is not arrange | positioned. The headers 1a and 1b are manufactured by curvedly forming an aluminum brazing sheet having a brazing filler metal layer on both surfaces thereof, not an extruded shape member. Moreover, the pin 4 is also formed from the brazing sheet which has a brazing filler metal layer on both surfaces. 11, the header 1a, 1b, the tube 3, or the windshield member 2 are soldered by the inside and outside brazing material 17 of the header 1a, 1b, and the pin is soldered. The pin 4 and the tube 3 are soldered by the brazing material 41 on both sides of (4). By such a configuration, it becomes possible to collectively solder each member in the furnace without performing torch soldering. Therefore, it is not necessary to provide the notch 21 in the windscreen member 2, and manufacturing cost can further be reduced.

12 shows a fifth embodiment of the present invention. In this embodiment, the brazing filler material 33 is deposited on the outer surface of the tube 3, and the brazing filler material 33 is used to connect the tube 3, the headers 1a, 1b, the tube 3, and the fin 4. It is a soldered batch. The production of the tube 3 having the brazing filler metal layer 33 on the outer surface may be performed by forming the tube 3 by an electric sealing tube of an aluminum brazing sheet, or by spraying the brazing filler material on the surface of the aluminum extruded shape tube 3. This can be done by. Even if it is set as such a structure, the tube 3, the header 1a, 1b, the tube 3, and the pin 4 can be soldered collectively. When the headers 1a and 1b and the windshield member 2 are joined together, the windshield member 2 is formed of an aluminum brazing sheet, and the brazing material of the windshield member 2 is used. do.

13 and 14 show a sixth embodiment of the present invention.

In this embodiment, a plurality of aluminum plate pins 42 are used as the pins 4. That is, each plate pin 42 forms a long thin plate shape along the longitudinal direction of the header 1a, 1b, and the width is set a little deeper than the width | variety of the tube 3. As shown in FIG. At the same time, at the position corresponding to the straight pipe portion 32 of the meander tube 3, at the position corresponding to the straight pipe portion 32 of the meander tube 3 in the width direction of the plate pin 42, the plate pin ( On one side edge in the width direction of 42), a tube fitting groove 42a cut and inserted toward the other edge is formed in a row position. The width (height direction in FIG. 14) of each tube fitting port 42a is set slightly smaller than the thickness of the tube 3, and the depth is set to a degree similar to the width of the tube 3.

Moreover, in the said plate pin 42, the contact piece 42b of an L-shape bent is protruded in the both edges of the width direction of each tube fitting part 42a. Moreover, in the site | part between the upper and lower tube fitting holes 42a of each plate pin 42, the slit 42c along the length direction of the plate pin 42 except the width direction both sides of the plate pin 42. It is formed in parallel in the width direction, whereby a plurality of pin-like pin portions 42d in the width direction of the plate pin 42 are formed between the respective slits 42c along the longitudinal direction of the plate pin 42. Formed.

The heat exchanger shown in FIG. 13 and FIG. 14 inserts both ends of each meandering tube 13 into the tube insertion hole 13 of the header 1a, 1b, and joins by torch soldering, and then the tube 3 The tube fitting holes 42a of the plurality of plate fins 42 arranged in parallel in the longitudinal direction in the longitudinal direction are connected to the straight pipe portion 32 of the tube 3 on one side in the width direction of the tube 3. It is forcibly press-fitting and press-fits each contact piece 42b of the plate pin 42 to the outer peripheral surface of the straight pipe part 32 in the thickness direction, and is fixed.

By this structure, the joining of the tube 3 and the header 1a, 1b can be reliably performed before affixing the plate pin 42, and the plate pin 42 is press-fitted to the torch 3 after that. By fitting, the heat exchanger can be easily assembled and the cost can be made low.

As mentioned above, although embodiment of this invention was described, this invention is not limited to these embodiment. For example, although each case showed the case where the windshield member 2 was provided, even if the windshield member 2 is not provided, it is contained in this invention.

As described above, the meandering tube is formed by connecting a plurality of meandering tubes in a communication state between the headers, and pins are disposed between the straight pipe portions of the meandering tubes. Since the number of assembly parts and the number of joining points between the tube and the header are less than those of the multi flow type heat exchanger, the number of joining parts and the joining work can be simplified, and the manufacturing cost can be reduced. Can be.

Originally, since a plurality of meandering tubes are arranged in the same plane and each meandering tube has a straight pipe portion, heat exchange can be performed between a heat exchange medium flowing through a plurality of parallel pipes arranged in parallel. Therefore, the heat exchange performance equivalent to the multi-flow type heat exchanger using a linear tube can be ensured.

In addition, if the air gap member is shielded by the windshield member to shield the air gap in the vicinity of the header where the corrugated fin is not disposed, the heat exchange fluid can be prevented from concentrating on the air gap. The amount of air for exchange can be sufficiently secured, thereby further improving the performance of the heat exchanger, in particular the heat exchange efficiency.

Claims (13)

The meandering tube 3 formed meandering by the parallel straight pipe part 32 and the curved pipe part 31 which connects the edge part of the adjacent straight pipe part 32 is provided in multiple numbers in the same plane, An end of the meander tube 3 is connected in communication with the hollow headers 1a and 1b, A heat exchanger, characterized in that the fin (4) is disposed between the straight pipe portion (32) of the meandering tube (3). The method of claim 1, A heat exchanger characterized in that the flow of the heat exchange medium is one-pass type from one hollow header (1a) to the other hollow header (1b). The method according to claim 1 or 2, The brazing materials 14 and 17 are deposited on the pins 4 and the headers 1a and 1b, and the tube 3, the fins 4 and the headers 1a and 1b are collectively soldered by the brazing materials. Heat exchanger characterized. The method according to claim 1 or 2, A brazing filler metal (33) is deposited on the tube (3), and the tube (3), the fins (4), and the headers (1a) (1b) are collectively soldered by the brazing filler material (33). According to any one of claims 1 to 4, A heat exchanger characterized in that the curved pipe portion (31) of the tube (3) is in contact with the header (1a) (1b). The method according to claim 1 or 2, The end of the tube 3 and the hollow headers 1a and 1b are joined by a torch brazing method, and the tube 3 and the fins 4 are joined by a zinc chloride reaction brazing method. Exchanger. The method according to claim 1 or 2, In the vicinity of the header (1a) (1b) where the curved pipe part 31 of the tube (3) exists, the void portion (A) without the fins (4) is formed, and the air for heat exchange is formed in the void portion. A heat exchanger, characterized in that the wind-shield member (2) for preventing passing through the portion (A) is provided. The method of claim 7, wherein The wind blowing member 2 is formed by extrusion molding integrally with the headers 1a and 1b, and protrudes in the tube direction from the outer periphery of the header on both sides in the width direction of the tube along the longitudinal direction of the header. Heat exchanger, characterized in that two are installed. The method of claim 8, The heat exchanger characterized in that the notch part (21) is provided in the at least one windshield member (2) at the side of the connection part of the end part of the tube (3) and a hollow header (1a) (1b). The method of claim 8, The wind blowing member 2 is formed by extrusion molding integrally with the headers 1a and 1b, and protrudes in the tube direction from the main surface of the header on one side of the width direction of the tube along the lengthwise direction of the header. Heat exchanger characterized in that one is installed in a state. The method according to any one of claims 8 to 10, A heat exchanger characterized in that a target heat exchanger mounting bracket is provided along the length of the header. The method of claim 7, wherein The heat exchanger member (2) is formed as an end of a sheet-shaped member having a U-shaped cross section which is covered around the header on the opposite side from the tube. The method of claim 12, Brazing materials 17 and 41 are deposited on the headers 1a and 1b and the pins 4, and the headers and the windshield members 2, the headers and tubes 3, the tubes and the pins are all soldered together by the brazing materials. Heat exchanger characterized in that.