JP2001133187A - Multiple heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To thin a multiple heat exchanger where a plurality of heat exchange modules are arranged in parallel in the circulation direction of the fresh air with simple structure. SOLUTION: A number of flat tubes 3... being connected while both ends are inserted and fitted to a slit-shaped opening 11 on the peripheral surface of both header pipes 1A and 2A are arranged in parallel between a pair of header pipes 1A and 2A for composing a core part 10, the multiple heat exchanger comprises a plurality of heat exchange modules M1-M3 where a zigzag fin 4 is included between the adjacent flat tubes 3 and 3, the modules M1-M3 ate arranged in parallel in the circulation direction of the fresh air for the core part 10 while being in contact one another, and the adjacent modules are arranged while the positions of the header pipes 1A and 2A are shifted in the longitudinal direction of the flat tube 3 each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double heat exchanger used for an evaporator and a condenser in an air conditioner system for automobiles, home use, business use, and the like.

[0002]

2. Description of the Related Art As a heat exchanger of an air conditioner system, a plurality of flat tubes forming a heat exchange pipe having both ends connected to both header pipes are arranged in parallel between a pair of opposed header pipes. And a laminated heat exchanger having meandering fins interposed between adjacent flat tubes is widely used. And especially in the evaporator, such a laminated heat exchanger is used as a heat exchange module, a plurality of the heat exchange modules are arranged in parallel in the direction of the outside air flowing to the core portion, and a refrigerant circuit is formed over all modules. Heat exchangers are frequently used.

FIG. 6A shows an example of the configuration of a conventional double heat exchanger comprising three heat exchange modules. The heat exchange module (M11) (M12) (M13) of this double heat exchanger
A pair of cylindrical header pipes (31), (31), and a number of flat tubes (32) connected to each other by inserting and connecting both ends into slit-shaped openings (31a) provided in the peripheral surface thereof. And the same header pipes (31) and (31) are communicated at appropriate places via communication pipes (39) and the like, so that the refrigerant inlet (33) of the module (M13) The refrigerant flowing from all modules (M11) ~
It is set so as to pass through the core part (34) of (M13) and exchange heat, and then reach the refrigerant outlet (35) of the module (M11).

[0004] In addition, (36) is an adjacent flat tube (32).
The meandering fins interposed between (32) and (37) are covers arranged on both sides of the core (34).
6) For both (37), use a wide member covering all modules (M11) to (M13) arranged in parallel as a common member, and use an independent narrow member for each of modules (M11) to (M13) There are times when you do.

[0005]

In recent years, it has been desired to reduce the volume of a heat exchanger, and in particular, a dual heat exchanger in which a plurality of heat exchange modules are arranged in parallel has a problem of thinning. However, since the outer diameter of the header pipe is naturally larger than the width of the flat tube to be inserted into the header pipe, in the above-mentioned conventional double heat exchanger, as shown in FIG. Even if (M13) is arranged so that the header pipes (31) and (31) are in contact with each other, a large gap (d1) is created between the flat tubes (33) and (33) of adjacent modules, and the overall thickness is reduced. Because of the increase in size, it hindered the reduction in thickness. Such a problem is the same even when the sectional shape of the header pipe is non-circular.

SUMMARY OF THE INVENTION In view of the above circumstances, it is a main object of the present invention to realize a thin heat exchanger having a simple structure in which a plurality of heat exchange modules are arranged in parallel in a direction of outside air flow.

[0007]

According to a first aspect of the present invention, there is provided a double heat exchanger comprising: a pair of header pipes having opposed slits formed at both ends on a peripheral surface of the header pipes; A plurality of flat tubes, each of which is a heat exchange pipe, which is inserted and connected to each other to form a heat exchange conduit, are arranged in parallel to form a core portion, and a plurality of flat tubes having meandering fins interposed between adjacent flat tubes. A plurality of heat exchange modules are arranged in parallel with each other in a flow direction of the outside air to the core portion in a state where the plurality of heat exchange modules are in contact with each other, and the adjacent heat exchange modules have a header pipe so as to reduce the interval between the flat tubes. The position is shifted from each other in the longitudinal direction of the flat tube.

According to the above configuration, since the header pipes of the adjacent heat exchange modules are displaced in the longitudinal direction of the flat tube, the maximum width portion in the thickness direction of the heat exchanger is linear in the direction. , And an overlap occurs in the direction. Therefore, the distance between the flat tubes of the adjacent heat exchange modules is reduced by the overlap, and the thickness of the entire dual heat exchanger is reduced.

According to a second aspect of the present invention, in the double heat exchanger of the first aspect, the plurality of heat exchange modules have header pipes and flat tubes of the same dimensions and shape. In this case, since the components of the plurality of heat exchange modules are shared, the cost of the members is reduced and the assembly and manufacture of the heat exchanger are facilitated.

According to the third aspect of the present invention, the first or second aspect is provided.
In the double heat exchanger, since the header pipe on one side of one adjacent heat exchange module is arranged to be in contact with the flat tubes of the other heat exchange module, the interval between the flat tubes of both modules is minimum, that is, It is １ ／ compared to the same interval when there is no displacement between the header pipes.

According to a fourth aspect of the present invention, in the first or second aspect,
In the double heat exchanger, the header pipe of each heat exchange module has a flat portion along the longitudinal direction on at least a part of the outer peripheral surface, and the header pipes of adjacent heat exchange modules closely contact the flat portions with each other. Has been placed. In this case, since the plurality of heat exchange modules are in surface contact with each other by the header pipe, the modules can be easily and reliably positioned at the time of assembling and manufacturing the double heat exchanger, and the entire heat exchanger is brazed at the contact interface. The strength of is improved.

According to a fifth aspect of the present invention, in the multiple heat exchanger according to any one of the first to fourth aspects, three or more heat exchange modules are arranged such that the positions of the header pipes are sequentially shifted in a staggered manner. In this case, the displacement of the header pipe becomes two or more steps, but the direction of the displacement is alternately reversed. Therefore, even if the number of modules increases, the increase in the dimension of the flat tube in the longitudinal direction due to the displacement is one step. Only.

According to a sixth aspect of the present invention, in the double heat exchanger according to any one of the first to fifth aspects, the reinforcing frame fitted to the outside of the header pipe across the plurality of heat exchange modules with the core side as the inside. Have. In this configuration,
Even if the header pipe is thin, the required fracture resistance can be imparted by the reinforcing frame, so the material cost is reduced by reducing the thickness, and the components of the heat exchanger are integrally joined by brazing in a furnace. In this case, since the heat conduction of the thin header pipe is good, the brazing temperature can be set low.

According to a seventh aspect of the present invention, in the compound heat exchanger according to any one of the first to sixth aspects, the meandering fins serve as headers of a plurality of heat exchange modules by passing outside air flowing through the core portion. A louver is provided to guide the pipes along the direction of displacement. That is,
In this duplex heat exchanger, since the plurality of heat exchange modules are arranged with the positions of the header pipes shifted from each other, if the outside air simply flows in a direction perpendicular to the core, the header pipe is positioned at the center with respect to the center of the core. Outside air is less likely to flow in the region having a concave shape, and conversely, in a region having a shape protruding toward the center of the core, the flow of the outside air is hindered by the header pipe. However, in the configuration of the present invention, the flow of the outside air is guided by the louvers of the meandering fins along the unevenness due to the positional deviation between the header pipes, so that the outside air is distributed and circulated evenly over the entire core portion. .

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a double heat exchanger according to an embodiment of the present invention.

The double heat exchanger of the first embodiment shown in FIGS. 1A and 1B has a core in a state where three heat exchange modules (M1), (M2) and (M3) having the same structure and size are in contact with each other. They are arranged in parallel in the direction of flow of outside air to the part (10) (arrow a in the figure b).

Each of these modules (M1) to (M3) is composed of a number of flat tubes (3) forming a heat exchange conduit between a pair of cylindrical header pipes (1A) (2A) opposed to each other. … Both ends are both header pipes (1A)
The core portion (10) is formed by being inserted into the slit-shaped openings (11) on the peripheral surface of (2A) and arranged in parallel, and meandering fins are formed between the adjacent flat tubes (3) and (3). (4) is interposed. (5) is a cover arranged on both sides of the core part (10), (6) is a refrigerant inlet provided in the lower header pipe (1B) of the module (M3), and (7) is an upper header pipe of the module (M1). It is a refrigerant outlet provided in (1A).

Thus, the modules (M1) to (M3)
Are in contact with each other at the upper and lower header pipes (1A) and (2A), but the intermediate module (M2) is shifted upward with respect to the modules (M1) and (M3) on both sides. . Thereby, the upper header pipes (1A) of the modules (M1) and (M3) on both sides abut on both side edges of the flat tube (3) of the intermediate module (M2), while the lower header pipes of the intermediate module (M2). Pipe (2A) is a module (M1) (M3) on both sides
Are in contact with the inner edges of the flat tubes (3).

The modules (M1) to (M3)
The adjacent upper header pipes (1A) and (1A) and the lower header pipes (2A) and (2A) are connected to each other via a connection pipe (9) and the like, and a module (M3)
The refrigerant flowing from the refrigerant inlet (6) provided in the module (1) passes through the cores (10) of all the modules (M1) to (M3) and exchanges heat, and then reaches the refrigerant outlet (7) of the module (M1). Is set to

In the duplex heat exchanger having the above configuration, the adjacent modules (M1) and (M2) and the module (M
Mutual flat tubes (3) in (2) and (M3)
(3) The gap (d2) between the header pipe (1A) (1
A) Same gap (d1) when they are arranged at the same height
[Refer to FIG. 6 (b)], and the thickness as a whole of the heat exchange is reduced accordingly, and it is considerably thinner as compared with the conventional dual heat exchanger shown in FIG.

The module (M2) is displaced upward with respect to the module (M1), but the module (M3) is displaced downward with respect to the module (M2). Because it is a shape-like arrangement, 2
No stage shift is added, and the overall height of the heat exchanger is 1
It will increase by the amount of step displacement. Therefore, even in the case of a double-type heat exchanger composed of four or more heat exchange modules, the staggered arrangement in which the shift directions are alternately reversed alternately allows the heat exchanger as a whole to have a dimension in the flat tube longitudinal direction. The increase is only required by one step.

In assembling and manufacturing such a composite heat exchanger, a brazing sheet is used for the constituent members such as the header pipes (1A) and (2A), the flat tubes (3) and the meandering fins (4), or the constituent members are used. A method is adopted in which separate brazing materials are interposed at the joints of the members, and these components are temporarily assembled and then integrally joined by brazing in a furnace.

In the first embodiment, the heat exchange module (M
1) to (M3) upper and lower header pipes (1A) (2
Although A) is cylindrical, the cross-sectional shape of the header pipe can be variously set, for example, as in the second to fourth embodiments shown in FIGS.

In the double heat exchanger of the second embodiment shown in FIG. 2A, the heat exchange modules (M1) to (M3) have the same structure and size, and each header pipe (1B) has It has a hexagonal cross section. Then, similarly to the first embodiment, an intermediate module (M2) arranged to be shifted upward and a lower module (M2) on both sides.
1) (M3) means that the header pipes (1B) are in surface contact with each other at a flat portion (12) that forms one side of a hexagon, and the modules (M
1) Each header pipe (1B) of (M3) is in contact with both side edges of the flat tube (3) of the intermediate module (M2) at a hexagonal corner (13). Although not shown, the arrangement of the header pipes on the lower side of the heat exchanger is the same as that on the upper side, but the header pipes of the intermediate module (M2) are the same as those of the first embodiment. (M1) The hexagonal corner of the flat tube (3) of (M3) is brought into contact with the inner edge of the flat tube (3).

Also in the double heat exchanger of the second embodiment, the gaps between the flat tubes (3) and (3) in the adjacent modules (M1) and (M2) and in the modules (M2) and (M3) are the same. , These modules (M1) to
When the header pipe (1B) of (M3) is arranged at the same height, it is １ ／, and the heat exchange as a whole is thinned accordingly. Then, as in the second embodiment,
As a header pipe of each heat exchange module, a pipe having a flat portion along the longitudinal direction on at least a part of the outer peripheral surface is used, and header pipes of adjacent modules are arranged so that the flat portions are in close contact with each other. In addition, when assembling and manufacturing the double heat exchanger, the modules can be easily and reliably positioned by surface contact, and the strength of the entire heat exchanger can be improved by brazing the contact interface.

In the double heat exchanger of the third embodiment shown in FIG. 2B, the heat exchange modules (M1) to (M3) have the same structure and size but each header pipe (1C).
The upper and lower portions of the peripheral surface are arc-shaped, and the left and right sides are vertical plane portions (14). As in the first and second embodiments, the intermediate module (M2) is arranged so as to be shifted upward with respect to the modules (M1) and (M3) on both sides. , The header pipes (1C) of the modules (M1) and (M3) on both sides
(1C) abuts both side edges of the flat tube (3) of the intermediate module (M2) at its inner flat portion (14), and the header pipe (1) of the intermediate module (M2).
There is line contact with C). On the lower side (not shown), the header pipe of the intermediate module (M2) is connected to the module (M1) by the flat portions (14) and (14) on both sides.
(M3) abuts the inner edge of the flat tube (3).

Also in the double heat exchanger of the third embodiment, the modules (M1) and (M2) and the module (M
Flat tubes (3) of each other in (2) and (M3)
The gap between (3) is determined by these modules (M1) to (M
This is ２ of the case where the header pipe (1C) of 3) is arranged at the same height, but the header pipe (1C) itself has a narrower shape than that of a cylindrical or polygonal pipe. Therefore, the heat exchanger as a whole becomes thinner. Also,
Modules (M1) to (M3) are header pipes (1
C) Although they are not in surface contact with each other, the flat portions (14) abut against the side edges of the flat tubes (3) of the adjacent modules, so that the positioning at the time of assembly and manufacture can be performed easily and reliably. The strength of the entire heat exchanger is improved by brazing the contact portion.

In the duplex heat exchanger of the fourth embodiment shown in FIG. 2C, the heat exchange modules (M1) to (M3) have the same structure and size except for the cross-sectional shape of the header pipe. That is, the modules (M1) and (M3) on both sides
The header pipe (1D) of the intermediate module (M2) has a substantially cylindrical shape, while the header pipe (1E) of the intermediate module (M2) has a substantially cylindrical shape. Inclined flat surface facing downward on both sides of the peripheral surface (16)
have. And the intermediate module (M2)
Inclined flat parts (16) (1) on both sides of header pipe (1E)
6) The module (M1) (M3) is placed in surface contact with the inclined flat part (15) of the header pipe (1D) of the module (M1) (M3), and is displaced upward with respect to the module (M1) (M3) on both sides. Has become.

On the upper side of the illustrated heat exchanger, the header pipes (1D) of the modules (M1) and (M3) are
At the lower edge corner (15a) of the inclined plane (15), the module (M
It is in contact with both side edges of the flat tube (3) of 2). Further, on the lower side of the heat exchanger (not shown), the header pipe (1E) of the module (M2) has an inclined flat portion (16).
(16) The module (M1) (M
3) abuts the inner edge of the flat tube (3);

In the duplex heat exchanger of the fourth embodiment, the modules (M1) and (M2) and the module (M
Flat tubes (3) of each other in (2) and (M3)
The gap between (3) is determined by these modules (M1) to (M
3) is smaller than when arranged at the same level. Further, since the header pipes (1D) and (1E) are in surface contact with each other at the inclined plane portions (15) and (16), the positioning at the time of assembling and manufacturing the heat exchanger is facilitated as described above. The strength of the entire heat exchanger by brazing the interface is also improved.
In the case where four or more heat exchange modules are used, the heat exchangers shown in FIG.
The module having a header pipe (1D) shown in FIG. 3 is used for the module at the intermediate part, and the header pipe (1E) shown in FIG.
What is necessary is just to arrange | position the thing which has the header pipe of the cross-sectional shape which turned upside down alternately in a staggered form.

The fifth embodiment of the double heat exchanger shown in FIG.
Three heat exchange modules (M1) having the same structure and size with the upper and lower header pipes (1F) and (2F) being cylindrical.
(M3), the upper and lower header pipes (1A) in the form in which the intermediate module (M2) is shifted upward with respect to the modules (M1) and (M3) on both sides, as in the first embodiment. Although (2A) is arranged so as to be in contact with each other, the header pipes (1F) and (2F) are thin. The reinforcing frames (8A) (8B) having a width ranging from the modules (M1) to (M3) are provided on the outer sides of the header pipe (1F) side and the header pipe (2F) side, respectively, with the core part (10) side as the inner side. ) Are fitted and fixed.

The outer surfaces of the reinforcing frames (8A) and (8B) are both flat, but the inner surfaces are three concave arcs corresponding to the circumferential surfaces of the three header pipes (1F) and (2F). Surface (81). And the header pipe (1
F) and (2F), the reinforcing frame (8
In (A), the center on the inner surface side is concave, while in the reinforcing frame (8B), the center on the inner surface side is convex.

In the double heat exchanger of the fifth embodiment, even if the header pipes (1F) and (2F) are thin and weak in strength, a sufficient breaking strength can be imparted by the reinforcing frames (8A) and (8B). Therefore, the material cost is reduced by reducing the thickness of the header pipes (1F) and (2F), and when the components of the heat exchanger are integrally joined and integrated by brazing in a furnace, the thin header pipe (1F) ( Since the heat conduction of 2F) is good, the brazing temperature can be set low. Thus, a molded product made of an inexpensive material such as a synthetic resin or a cast alloy may be used for the reinforcing frames (8A) and (8B), and these may be fitted and fixed after brazing in the furnace.

Such a reinforcing frame can be used even when the header pipe of each heat exchange module has a cross-sectional shape other than a circular shape, or when the number of modules constituting the double heat exchanger is two or four or more. It is also possible to use a pipe having an inner surface shape which can be similarly applied and which is appropriately fitted to the entire outer shape of the header pipes arranged in a staggered manner.

As the meandering fins (4) interposed between the adjacent flat tubes (3) and (3) in the compound heat exchanger of the present invention, those having a wide width serving as a common member across all the parallel heat exchange modules are used. It may be used, or each module may use an independent narrow width,
In any case, it is recommended to provide a louver for guiding the outside air flowing through the core portion (10) in a direction in which the header pipes of the plurality of heat exchange modules are displaced from each other.

That is, in the meandering fin with louvers, a large number of louvers are cut and formed in each folded flat portion, and the flow of the outside air flowing through the core portion (10) changes depending on the direction of these louvers. For example, FIG.
In the meandering fins (4) shown in FIG. 5, louvers (41)... Are formed obliquely upward in each flat portion (4a), and the outside air inflow side (10a) and outside air outflow side ( 10b) and the louvers (41) are inclined in the opposite direction (both toward the center), so that the outside air flowing through the core portion (10) is guided to form a mountain-shaped flow as shown by the arrow b.

On the other hand, in the multiple heat exchanger according to the present invention, since the plurality of heat exchange modules are arranged with the header pipes shifted from each other, the outside air simply flows in the orthogonal direction to the core portion (10). In this case, there is a region near the header pipe in which the outside air is difficult to flow and a region in which the flow of the outside air is hindered, and there is a concern that the heat exchange efficiency is reduced. For example, referring to FIG. 1 (a), at the position of the intermediate module (M2), outside air does not flow to the upper region (Z1) which is concave with respect to the center of the core portion (10), In the lower region (Z2) that protrudes toward the center of the core (10), the flow of outside air is hindered by the header pipe (2A).

Therefore, as shown in FIG.
If the meandering fins (4) arranged between the adjacent flat tubes (3) and (3) are provided with louvers for guiding the flow of the outside air into a mountain shape as shown in FIG.
Outside air flows to the upper region (Z1) at the position of the intermediate module (M2), and the flow of outside air is not obstructed in the lower region (Z2), so that the outside air is evenly distributed to the entire core (10). Since it is distributed, the heat exchange efficiency does not decrease.

In the figure, all the heat exchange modules (M1) to (M) are formed as meandering fins (4) with louvers.
Although the wide members which are used as the common members over 3) are used, when the independent narrow members are used in each module, the combination is set such that each louver brings about the same outside air guiding action as a whole. do it. Further, even in the case of a compound heat exchanger composed of four or more modules, a meandering shape provided with a louver for guiding the flow of outside air along the irregularities in accordance with the irregularities due to the staggered arrangement of the header pipes of these modules. Fins may be used.

The compound heat exchanger according to the present invention has the number of heat exchange modules, the number and arrangement of the flat tubes (3) in each module, the configuration of the refrigerant circuit, and the configuration of the refrigerant ports (6) and (7). The detailed configuration such as the mounting position, the number and shape of the louvers (41) of the meandering fins (4) with louvers, and the like can be variously changed in addition to the embodiment. Further, the installation posture of the double heat exchanger may be reversed upside down from the illustration in the first to fifth embodiments, or may be such that the flat tubes (3) are horizontal.

[0041]

According to the first aspect of the present invention, as a multiple heat exchanger in which a plurality of heat exchange modules are arranged in parallel in the outside air flow direction, the header pipes of adjacent modules are simply shifted from each other. With such a configuration, the distance between the flat tubes, which are the heat exchange conduits of the adjacent modules, is narrowed, so that the entire module is made thinner.

According to the second aspect of the present invention, since the header pipes and the flat tubes of the plurality of heat exchange modules are shared in the above-mentioned multiple type heat exchanger, the cost of the members is reduced and the heat exchanger is reduced. There is an advantage that assembling and manufacturing become easy.

According to the third aspect of the present invention, a particularly thin heat exchanger is provided as the above-mentioned double heat exchanger.

According to the fourth aspect of the present invention, in the above-mentioned double heat exchanger, since each heat exchange module has a structure in which the header pipes are in surface contact with each other, the modules can be easily assembled at the time of assembling and manufacturing the heat exchanger. In addition, the positioning can be performed reliably and reliably, and the strength of the entire heat exchanger is improved by brazing the contact interface.

According to the fifth aspect of the present invention, in the above-mentioned double type heat exchanger comprising three or more heat exchange modules, since these modules are arranged so that the positions of the header pipes are sequentially shifted in a staggered manner, the flat tube is formed. There is an advantage that the increase in the size in the longitudinal direction is only a minimum shift of one step regardless of the number of modules.

According to the sixth aspect of the present invention, in the above-mentioned double heat exchanger, there is provided a reinforcing frame fitted to the outside of the header pipe over the plurality of heat exchange modules. As a result, the necessary fracture resistance can be secured, so that the material cost can be reduced by reducing the thickness, and the brazing temperature when joining and integrating the components of the heat exchanger by furnace brazing can be lowered. There is an advantage that the energy cost for assembling and manufacturing can be reduced.

According to the seventh aspect of the present invention, as the above-mentioned double heat exchanger, the flow of the outside air is guided by the meandering fins with louvers so as to follow the unevenness due to the positional deviation between the header pipes, so that the heat is evenly distributed over the entire core portion. And the outside air is distributed and circulated to provide heat exchange efficiency.

[Brief description of the drawings]

FIG. 1 shows a double heat exchanger according to a first embodiment of the present invention, in which (a) is a perspective view of the entirety, and (b) is a longitudinal side view showing a meandering fin omitted.

FIGS. 2A and 2B show a main part of a duplex heat exchanger according to another embodiment without the meandering fins. FIG. 2A is a second embodiment, FIG. 2B is a third embodiment, FIG. The figures are longitudinal sectional side views of the upper side of the fourth embodiment.

FIG. 3 is a longitudinal sectional side view showing a compound heat exchanger according to a fifth embodiment without meandering fins.

FIG. 4 is a vertical sectional side view showing an example of a meandering fin with a louver used in the compound heat exchanger of the present invention.

FIG. 5 is a vertical sectional side view of a compound heat exchanger of the present invention using the meandering fins with louvers of FIG. 4;

FIG. 6 shows a configuration example of a conventional double heat exchanger, and FIG.
The figure is a perspective view of the whole, and the figure (b) is a longitudinal sectional side view showing the meandering fins omitted.

[Explanation of symbols]

 1A to 1F header pipe 11 slit opening 12, 14 to 16 plane 2A, 2F header pipe 3 ················································································ Louver 8A, 8B ······························· ..... Core section M1 to M3 ... Heat exchange module

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Tatsuya Hanafusa 224 Kaiyamacho, Sakai City Showa Aluminum Co., Ltd. F-term (reference) 3L065 AA07 3L103 AA01 AA05 AA11 AA32 AA37 AA50 BB42 CC23 CC28 DD12 DD17 DD54 DD55 DD56 DD58

Claims (7)

[Claims] 1. A plurality of flat tubes forming a heat exchange conduit connected in a state in which both ends are respectively inserted into and connected to slit-shaped openings in the peripheral surfaces of both header pipes are arranged in parallel between a pair of opposed header pipes. A plurality of heat exchange modules in which meandering fins are interposed between adjacent flat tubes, and the plurality of heat exchange modules are in parallel with each other in a direction in which outside air flows to the core in a state where the heat exchange modules are in contact with each other. A dual heat exchanger, wherein the heat exchanger modules are arranged such that header pipes are shifted from each other in the longitudinal direction of the flat tubes so as to reduce the interval between the flat tubes. 2. The multiple heat exchanger according to claim 1, wherein the plurality of heat exchange modules have a header pipe and a flat tube having the same dimensions and shape. 3. The heat exchange module according to claim 1, wherein one header pipe of one adjacent heat exchange module is arranged so as to be in contact with the flat tube of the other heat exchange module.
2. The double heat exchanger according to item 1. 4. A header pipe of each heat exchange module has a flat portion along a longitudinal direction on at least a part of an outer peripheral surface, and header pipes of adjacent heat exchange modules are arranged such that the flat portions are in close contact with each other. The composite heat exchanger according to any one of claims 1 to 3, wherein: 5. The dual heat exchanger according to claim 1, wherein three or more heat exchange modules are arranged by sequentially shifting the positions of the header pipes in a staggered manner. 6. The double heat exchanger according to claim 1, further comprising a reinforcing frame fitted to the outside of the header pipe across the plurality of heat exchange modules, with the core side being inside. 7. The meandering fin includes a louver for guiding outside air flowing through the core portion along a direction in which the header pipes of the plurality of heat exchange modules are displaced from each other. 2. The double heat exchanger according to item 1.