KR20190096120A - A heat exchanger and a method for manufacturing the same - Google Patents

Abstract

The present invention relates to a heat exchanger and a method for manufacturing the same. According to an aspect of the present invention, the heat exchanger comprises a plurality of refrigerant tubes and heat exchange fins coupled to the refrigerant tubes, wherein the heat exchange fins comprises a fin plate, a first coupling unit opened in the fin plate in the shape corresponding to the refrigerant tubes, and a second coupling unit opened in the fin plate in an external side direction from an external surface of the first coupling unit.

Description

A heat exchanger and a method for manufacturing the same

The present invention relates to a heat exchanger and a method of manufacturing the same.

In general, the heat exchanger is used as a component of the refrigeration cycle, and configured to allow the refrigerant to flow. In particular, the heat exchanger performs a function of cooling or heating the air through heat exchange with the air. For example, the heat exchanger may be used in a refrigeration apparatus such as an air conditioner or a refrigerator, and may function as a condenser or an evaporator depending on whether the refrigerant is condensed or evaporated by heat exchange.

In detail, the heat exchanger includes a refrigerant tube through which a refrigerant flows, and a heat exchange fin coupled with the refrigerant tube to increase an area in which the refrigerant in the refrigerant tube contacts air, that is, a heat exchange area. The heat exchange fins may be provided with a coupling part opened to be coupled to the refrigerant tube.

The heat exchange fins may be provided in plural and the plurality of heat exchange fins may be arranged to be stacked along an extension direction of the refrigerant tube. As such, a predetermined space is formed between the stacked heat exchange fins, and air may be exchanged with the refrigerant of the tube while the air flows into the predetermined space.

At this time, as the heat exchange fin and the refrigerant tube are closely sealed, the heat exchange rate of the refrigerant and the air may be increased. Therefore, in the conventional heat exchanger, various methods for coupling the refrigerant tube and the heat exchange fin in close contact have been proposed.

For example, a method of inserting the refrigerant tube into a coupling part provided in the heat exchange fin and then expanding (hereinafter, expanding) the outer diameter of the refrigerant tube to use the heat exchange fin and the refrigerant tube in close contact with each other has been widely used. At this time, an expansion device was inserted into the refrigerant tube to expand the refrigerant tube.

However, according to this type of heat exchanger and its manufacturing method, there is a problem that the process of expanding the refrigerant tube is complicated, thereby increasing the manufacturing cost and manufacturing time of the heat exchanger. In addition, there is a problem that a predetermined concave-convex structure formed inside the refrigerant tube is deformed in order to improve heat exchange efficiency.

In addition, in the process of expanding the expansion device into the inside of the refrigerant tube and expanding the pipe, the refrigerant tube is deformed into an undesired shape, thereby degrading the performance of the refrigerant tube and producing a defective product.

The present invention has been proposed to solve such a problem, and an object of the present invention is to provide a heat exchanger and a method of manufacturing the same, which do not deform the shape of the refrigerant tube and effectively adhere the refrigerant tube to the heat exchange fins.

In addition, an object of the present invention is to provide a heat exchanger and a method of manufacturing the same, which simultaneously perform the coupling between the refrigerant tube and the heat exchange fin and the refrigerant tube, thereby simplifying the manufacturing process and reducing manufacturing time and manufacturing cost.

The heat exchanger according to an embodiment of the present invention includes a plurality of refrigerant tubes and heat exchange fins coupled to the plurality of refrigerant tubes, wherein the heat exchange fins have a fin plate and a shape corresponding to the refrigerant tube. A first coupling part is opened and a second coupling part is opened to the pin plate in an outward direction from an outer surface of the first coupling part.

In particular, the second coupling portion may be formed on the first coupling portion. The second coupling part may include a first length in contact with an outer surface of the first coupling part and a second length extending upward from an outer surface of the first coupling part, and the first length may be longer than the second length. have.

In addition, the coolant tube may be inserted into the first coupling part, and the filler metal for joining the coolant tube and the first coupling part may be inserted into the second coupling part. In this case, the filler metal may be made of aluminum having a lower melting point than the refrigerant tube and the heat exchange fin.

In addition, the plurality of refrigerant tubes and the heat exchange fins may be made of aluminum. That is, the heat exchanger according to the idea of the present invention is formed of aluminum.

In addition, the method for manufacturing a heat exchanger according to the spirit of the present invention is provided with a refrigerant tube and a filler metal, a heat exchange fin provided with a first coupling portion and a second coupling portion, the refrigerant tube is inserted into the first coupling portion The heat exchange fin, the refrigerant tube, and the filler metal are coupled to each other so that the filler metal is inserted into the second coupling portion, and the heat exchange fin, the refrigerant tube, and the assembly of the filler metal are above the melting point of the filler metal. Heated by the filler metal, and the refrigerant tube and the first coupling part are brought into close contact with each other.

In this case, the second coupling part may be formed on the first coupling part so that the filler metal is melted and flows between the refrigerant tube and the first coupling part. The refrigerant tube and the filler metal may be inserted into the first coupling part and the second coupling part in contact with each other. Therefore, the filler metal may be disposed in contact with the upper portion of the refrigerant tube.

In addition, the refrigerant tube extends in a first direction, the filler metal extends in the first direction with a length corresponding to the refrigerant tube, and the refrigerant tube and the filler metal are parallel to one side in the first direction. It is disposed so as to contact, it can be inserted into the first coupling portion and the second coupling portion.

The refrigerant tube may further include a second refrigerant tube extending in a first direction and connecting a plurality of first refrigerant tubes disposed in a second direction and a pair of first refrigerant tubes disposed adjacent to the second direction. And a tube coupling part in which the first refrigerant tube and the second refrigerant tube are in contact with each other. The filler metal may be disposed in the tube coupling part, and the first refrigerant tube and the second refrigerant tube may be fixed and coupled by melting the filler metal.

In addition, the heat exchange fin, the refrigerant tube and the filler metal may be made of aluminum, the melting point of the filler metal may be lower than the melting point of the heat exchange fin and the refrigerant tube.

According to the present invention, by closely contacting the refrigerant tube and the heat exchange fin through the filler metal, there is an advantage that the heat exchange efficiency between the air and the refrigerant is increased and the performance of the heat exchanger is improved.

In particular, the filler metal may be melted and filled between the refrigerant tube and the heat exchange fin, and thus, the refrigerant tube and the heat exchange fin may be closely coupled to each other.

In addition, by arranging the filler metal to be melted not only between the refrigerant tube and the heat exchange fin but also between the refrigerant tube, the manufacturing process of the heat exchanger may be simplified and the coupling force between components may be increased. .

In addition, since the expansion process of the refrigerant tube is not performed, the deformation of the refrigerant tube can be prevented.

In particular, since deformation of the concave-convex structure formed on the inner surface of the refrigerant tube is prevented in order to increase the heat exchange efficiency, there is an advantage that the first designed thermal efficiency can be ensured even after the coupling between the components of the heat exchanger.

1 is a view showing a heat exchanger according to an embodiment of the present invention.
2 is a view showing a method of manufacturing a heat exchanger according to an embodiment of the present invention.
3 is a view showing a heat exchange fin of the heat exchanger according to an embodiment of the present invention.
4 is a view illustrating a combination of a heat exchange fin, a refrigerant tube, and a filler metal of a heat exchanger according to an embodiment of the present invention.
5 is a view showing an exemplary shape of the filler metal of the heat exchanger according to an embodiment of the present invention.
6 is a view showing a combination of the refrigerant tube and the filler metal of the heat exchanger according to an embodiment of the present invention.
7 is a view showing a melting process of the filler metal of the heat exchanger according to an embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. However, the spirit of the present invention is not limited to the embodiments presented, and those skilled in the art who understand the spirit of the present invention can easily suggest other embodiments within the scope of the same idea.

1 is a view showing a heat exchanger according to an embodiment of the present invention.

As shown in FIG. 1, the heat exchanger 10 according to an embodiment of the present invention includes a plurality of refrigerant tubes 20 and heat exchange fins 30 coupled to the plurality of refrigerant tubes 20. .

The refrigerant tube 20 may be understood as a flow tube through which the refrigerant flows. In addition, the heat exchanger 10 may function as an evaporator or a condenser depending on the nature of the refrigerant flowing in the refrigerant tube 20. For example, when the high temperature and high pressure refrigerant discharged from the compressor flows through the refrigerant tube 20, the heat exchanger 10 may function as a condenser.

In addition, the refrigerant tube 20 may be provided in a shape. In FIG. 1, a refrigerant tube 20 having a circular cross-sectional area is illustrated. In addition, the refrigerant tube 20 includes a first refrigerant tube 21 coupled to the heat exchange fin 30 and a second refrigerant tube 26 connecting the first refrigerant tube 21.

In this case, the first refrigerant tube 21 extends in the first direction A, and a plurality of the first refrigerant tubes 21 are disposed in the second direction B. FIG. In FIG. 1, six first refrigerant tubes 21 arranged in the second direction B are illustrated.

In addition, the second refrigerant tube 26 connects a pair of first refrigerant tubes 21 adjacent to each other in the second direction B. Accordingly, the second refrigerant tube 26 may be provided in a bent form and may be referred to as a U-shaped tube or a return tube. 1 exemplarily shows three second refrigerant tubes 26. Accordingly, the heat exchanger 10 shown in FIG. 1 may be generated by separating the refrigerant flow into three parts.

The heat exchange fin 30 may be understood as a configuration for widening the heat exchange area between the refrigerant flowing in the refrigerant tube 20 and the air passing through the heat exchanger 10. That is, the heat exchange fins 30 may be combined with the refrigerant tube 20 to increase the heat exchange efficiency of the heat exchanger 10.

In addition, the heat exchange fins 30 may be provided in various numbers and shapes. In FIG. 1, heat exchange fins 30 extending in the second direction B correspond to six first refrigerant tubes 21 arranged in the second direction B. Referring to FIG. In addition, a plurality of heat exchange fins 30 are arranged in the first direction A.

In summary, the first refrigerant tube 21 extends in the first direction A and is spaced apart in the second direction B, and the heat exchange fins 30 are arranged in the second direction B. It is extended and spaced apart in the first direction (A).

The coolant tube 20 and the heat exchange fin 30 may be provided in different shapes according to the place where the coolant tube 20 and the heat exchanger fin 30 are installed, and are illustrated in FIG.

At this time, when there is a gap between the heat exchange fin 30 and the refrigerant tube 20, the movement of heat may not be made effectively. That is, when the heat exchange fin 30 and the refrigerant tube 20 are not in close contact, the heat exchange efficiency of the heat exchanger 10 is lowered.

Therefore, the heat exchanger 10 according to the spirit of the present invention is manufactured so that the heat exchange fins 30 and the refrigerant tube 20 are in close contact. Hereinafter, the heat exchanger manufacturing method by each configuration and coupling of the heat exchanger 10 will be described in detail. In addition, the manufacturing method of the heat exchanger 10 provided in the shape of FIG. 1 for convenience of description is demonstrated as an example.

2 is a view showing a method of manufacturing a heat exchanger according to an embodiment of the present invention. FIG. 2 briefly illustrates a process of manufacturing the heat exchanger, which will be described in detail with reference to FIGS. 3 to 7.

As shown in FIG. 2, the refrigerant tube 20 and the heat exchange fins 30 are provided to manufacture the heat exchanger 10. In addition, the heat exchanger 10 according to the spirit of the present invention is provided with a filler metal (Filler metal, 100) for bonding the refrigerant tube 20 and the heat exchange fin 30 (S10).

At this time, the refrigerant tube 20, the heat exchange fin 30 and the filler metal 100 is provided with aluminum (Aluminum). That is, the heat exchanger 10 according to the spirit of the present invention is provided with aluminum (All Aluminum heat exchanger).

However, the refrigerant tube 20, the heat exchange fin 30 and the filler metal 100 may be provided with different kinds of aluminum. In detail, the filler metal 100 may be formed of aluminum having a lower melting point than the refrigerant tube 20 and the heat exchange fins 30.

For example, the filler metal 100 may be made of aluminum having a melting point of 577 degrees, and the refrigerant tube 20 and the heat exchange fin 30 may be made of aluminum having a melting point of 660 degrees.

In addition, in order to manufacture the heat exchanger illustrated in FIG. 1, the refrigerant tube 20, the heat exchange fins 30, and the filler metal 100 may be provided in plural numbers.

Hereinafter, the heat exchange fin 30 provided for manufacturing the heat exchanger 10 will be described in detail with reference to FIG. 3.

3 is a view showing a heat exchange fin of the heat exchanger according to an embodiment of the present invention. 3 illustrates a portion of one of the heat exchange fins of the plurality of heat exchange fins 30 coupled to the refrigerant tube 20.

As shown in FIG. 3, the heat exchange fin 30 includes a fin plate 31 and a first coupling portion 32 and a second coupling portion 36 formed on the fin plate 31.

The fin plate 31 may be provided in various shapes to form an appearance of the heat exchange fin 30. The width of the fin plate 31 may correspond to a heat exchange area in contact with air. In addition, the width of the pin plate 31 may be provided relatively narrow for effective heat exchange.

In addition, the fin plate 31 may have a structure in which the condensed water generated by the heat exchange or the heat exchange area is smoothly flowed. For example, the pin fill rate 31 may be provided with a plurality of uneven structures, which are omitted in FIG. 3.

In addition, a plurality of openings are formed in the pin plate 31. The opening may be equal to the number of the refrigerant tubes 30 coupled to the fin plate 31. That is, as shown in FIG. 1, when six refrigerant tubes are coupled to the fin plate 31, six openings are formed in the fin plate 31.

Such an opening is provided with the first coupling part 32 and the second coupling part 36. That is, the first coupling part 32 and the second coupling part 36 form one opening in the pin plate 31.

The first coupling part 32 is opened to the fin plate 31 in a shape corresponding to that of the refrigerant tube 20. In detail, it may be formed in a shape corresponding to the cross section of the refrigerant tube (20). For example, corresponding to the refrigerant tube 20 having a circular cross section, the first coupling portion 32 is opened in a circular shape.

In this case, the first coupling part 32 may be formed larger than the cross section of the refrigerant tube 20. For example, when the outer radius of the refrigerant tube 20 is R, the first coupling portion 32 is opened to have a radius of R1 larger than R. (R1> R)

The second coupling part 36 is opened to the pin plate 31 in an outward direction from the outer surface of the first coupling part 32. That is, the second coupling part 36 may be provided in a shape recessed outward from the first coupling part 32.

Accordingly, one opening formed by the first coupling portion 32 and the second coupling portion 32 has a shape in which at least a portion of the opening formed in the first coupling portion 32 and the second coupling portion 32 is further opened outward. Have

In addition, the second coupling part 32 is positioned above the first coupling part 32. That is, one opening has a shape in which the upper part is further opened outward from the shape corresponding to the refrigerant tube 20 as a whole.

In this case, the second coupling part 36 may be provided in various shapes. In FIG. 3, a rectangular shape having a first length t1 and a second length t2 is illustrated, but this is exemplary.

In this case, the first length t1 may be understood as a length in contact with the outer surface of the first coupling part 32. In FIG. 3, for convenience of description, the horizontal straight length of the second coupling part 36 is illustrated, but the first length t1 is the length of an arc corresponding to the outer circumferential surface 32a of the first coupling part 32. It can be understood as.

In addition, the second length t2 may be understood as a length extending upward from an outer surface of the first coupling portion 32. In FIG. 3, for convenience of description, the maximum length in the vertical direction of the second coupling part 36 is illustrated, but the second length t2 is understood as each length extending upward from the first coupling part 32. Can be.

In particular, the first length t1 may be longer than the second length t2. That is, the second coupling part 36 may be formed to be in contact with a relatively large area of the first coupling part 32. For example, the first length t1 may be provided as 1 to 5 mm, and the second length t2 may be provided as 0.2 to 2 mm.

As such, a plurality of openings formed by the first coupling part 32 and the second coupling part 36 are formed in the heat exchange fin 30, and the heat exchange fin 30 is provided in plural numbers.

Referring back to FIG. 2, the first refrigerant tube 21 is inserted into the first coupling part 32 (S20), and the filler metal 100 is inserted into the second coupling part 36 ( S30). In this case, the two processes are described separately for convenience, but the two processes may be performed at the same time. Hereinafter, a detailed description will be given with reference to FIGS. 4 and 5.

4 is a view showing a combination of the heat exchange fin, the refrigerant tube and the filler metal of the heat exchanger according to an embodiment of the present invention, Figure 5 is an exemplary shape of the filler metal of the heat exchanger according to an embodiment of the present invention Figure is a diagram.

4 and 5, the first refrigerant tube 21 and the filler metal 100 is provided in contact with each other. In detail, the filler metal 100 extends in the first direction A like the first refrigerant tube 21.

The filler metal 100 may extend in the first direction A to a length corresponding to the refrigerant tube 20. In addition, the length of the first direction A of the filler metal 100 may be provided longer than the length of the first direction A of the first refrigerant tube 21.

In addition, as shown in FIG. 5, the filler metal 100 may be provided in various cross sections. The filler metal 100 illustrated in FIG. 5A corresponds to a flat strip type, and the filler metal 100a illustrated in FIG. 5B has a relatively large radius. Corresponds to the rod type.

In addition, the filler metal 100b illustrated in FIG. 5C corresponds to a wire type provided in a circular shape having a relatively small radius. The shape of the filler metal may be provided in various shapes for convenience of manufacture, and may be provided to correspond to the second coupling part 36.

At this time, as shown in (a) of FIG. 4, the first refrigerant tube 21 and the filler metal 100 are disposed to be in contact with one side in parallel with the first direction A. FIG. In particular, the filler metal 100 may be disposed in contact with the upper portion of the first refrigerant tube (21).

And, as shown in Figure 4 (b), the first refrigerant tube 21 and the filler metal 100 may be inserted into the first coupling portion 32 and the second coupling portion 36 at the same time. . That is, the combination of the first refrigerant tube 21 and the filler metal 100 is inserted into the opening formed by the first coupling portion 32 and the second coupling portion 36.

At this time, the coupling of the first refrigerant tube 21 and the filler metal 100 may correspond to a simple contact, and may correspond to a weak coupling of the position is fixed.

In addition, the opening of the combination of the first refrigerant tube 21 and the filler metal 100 is easily inserted into the opening formed by the first coupling portion 32 and the second coupling portion 36, the opening is It is formed larger than the first refrigerant tube 21 and the filler metal 100.

In detail, as described above, the first coupling part 32 is formed to have a larger radius than the first refrigerant tube 21, and the second coupling part 36 is formed to be larger than the filler metal 100. Can be. Accordingly, a predetermined empty space is generated between the opening, the first refrigerant tube 21 and the filler metal 100.

In particular, an empty space generated between the outer circumferential surface 32a of the first coupling part 32 and the first refrigerant tube 21 is referred to as a gap G. In general, such a gap G may be formed to about 0.4 ~ 0.6mm. In this case, the gap G may be understood as a part to be minimized in the completed heat exchanger 10 for the heat exchange efficiency of the heat exchanger 10.

As such, the first refrigerant tube 21 and the filler metal 100 are inserted into the openings of the heat exchange fins 30, respectively. In the heat exchanger 10 of FIG. 1, a combination of six first refrigerant tubes 21 and filler metal 100 is inserted into a plurality of heat exchange fins 30 arranged in the first direction A, respectively. . In other words, the plurality of heat exchange fins 30 are inserted into the combination of the six first refrigerant tubes 21 and the filler metal 100 arranged in the second direction (B).

Referring back to FIG. 2, the first refrigerant tube 21 and the second refrigerant tube 26 are combined (S40). That is, the second refrigerant tube 26 is coupled to the first refrigerant tube 21 while the first refrigerant tube 21, the filler metal 100, and the heat exchange fin 30 are coupled to each other. .

6 is a view showing a combination of the refrigerant tube and the filler metal of the heat exchanger according to an embodiment of the present invention. For convenience, the heat exchange fin 30 is omitted in FIG. 6.

As shown in FIG. 6, the second refrigerant tube 26 connects a pair of adjacent first refrigerant tubes 21 in the second direction (B). In this case, the refrigerant tube 20 may include a tube coupling part 23 in contact with the first refrigerant tube 21 and the second refrigerant tube 26.

The tube coupling portion 23 may be understood as a portion where the first refrigerant tube 21 and the second refrigerant tube 26 overlap. The tube coupling part 23 may be formed such that any one of the first refrigerant tube 21 and the second refrigerant tube 26 is inserted into the other. In addition, the area of the tube coupling portion 23 may be formed differently according to the design.

In addition, the tube coupling portion 23 may be understood as a weak coupling or contacting portion of the coupling between the first refrigerant tube 21 and the second refrigerant tube 26. In particular, it may mean a coupling to the extent that the refrigerant can flow out.

As described above, the filler metal 100 may be further extended in the first direction A than the first refrigerant tube 21. Accordingly, the filler metal 100 may be disposed in the tube coupling part 23. In detail, at least a part of the filler metal 100 is disposed above the tube coupling part 23.

And, referring again to Figure 2, the filler metal 100 is melted (S50). That is, a predetermined heat is applied to the assembly of the first refrigerant tube 21, the second refrigerant tube 26, the heat exchange fin 30 and the filler metal 100. In this case, the filler metal 100 may be heated to a temperature higher than the melting point of the filler metal 100 to melt the filler metal 100.

7 is a view showing a melting process of the filler metal of the heat exchanger according to an embodiment of the present invention. 7 (a) is before the filler metal 100 is melted, and (b) of FIG. 7 is applied after the filler metal 100 is melted.

In FIG. 7A, the gap G between the first coupling part 32 and the first refrigerant tube 21 may be confirmed. And, in the case of Figure 7 (b), the filler metal 100 is melted and flows between the first refrigerant tube 21 and the first coupling portion 32 and the first refrigerant tube 21 and The first coupling portion 32 is in close contact.

In particular, as the filler metal 100 is disposed above the first refrigerant tube 21, the filler metal 100 may naturally flow down by gravity to fill the gap G. In addition, as the molten filler metal 100 flows down the tube coupling part 23, the first refrigerant tube 21 and the second refrigerant tube 26 may be fixedly coupled to each other.

In summary, the first refrigerant tube 21 and the filler metal 100 are disposed to be in contact with each other and inserted together into an opening formed in the heat exchange fin 30. In addition, the second refrigerant tube 26 is coupled to the first refrigerant tube 21 to form the first refrigerant tube 21, the second refrigerant tube 26, the heat exchange fins 30, and the filler. An assembly of the metal 100 is formed. Then, such an assembly is heated to melt the filler metal 100.

Through such a simple process, it is possible to manufacture the heat exchanger 10 according to the spirit of the present invention. In particular, the first refrigerant tube 21 and the heat exchange fins 30 are in close contact with each other, and the first refrigerant tube 21 and the second refrigerant tube 26 may be fixed and coupled.

In addition, shape deformation of the first refrigerant tube 21, the second refrigerant tube 26, and the heat exchange fin 30 may be prevented.

10: heat exchanger 20: refrigerant tube
21: first refrigerant tube 26: second refrigerant tube
30: heat exchange fin 31: fin plate
32: first coupling portion 36: second coupling portion
100: filler metal G: gap

Claims (15)

A plurality of refrigerant tubes; And
And a heat exchange fin coupled to the plurality of refrigerant tubes.
The heat exchange fins,
Pin plate;
A first coupling part opened in the fin plate in a shape corresponding to that of the refrigerant tube; And
A second coupling part opened in the pin plate in an outward direction from an outer surface of the first coupling part;
Heat exchanger characterized in that it is included. The method of claim 1,
And the second coupling part is formed on an upper portion of the first coupling part. The method of claim 2,
The second coupling portion includes a first length in contact with the outer surface of the first coupling portion and a second length extending upward from the outer surface of the first coupling portion,
And the first length is longer than the second length. The method of claim 1,
The refrigerant tube is inserted into the first coupling portion,
And a filler metal for joining the refrigerant tube and the first coupling part to the second coupling part. The method of claim 4, wherein
The filler metal is a heat exchanger, characterized in that the lower melting point than the refrigerant tube and the heat exchange fins. The method of claim 1,
And the plurality of refrigerant tubes and the heat exchange fins are made of aluminum. Refrigerant tube and filler metal are prepared,
A heat exchange fin having a first coupling portion and a second coupling portion is provided.
The heat exchange fin is coupled to the refrigerant tube and the filler metal such that the refrigerant tube is inserted into the first coupling portion and the filler metal is inserted into the second coupling portion.
The heat exchange fin, the refrigerant tube and the assembly of the filler metal is heated above the melting point of the filler metal,
And the refrigerant tube and the first coupling part are brought into close contact with each other by the filler metal. The method of claim 7, wherein
The second coupling portion is formed on top of the first coupling portion so that the filler metal is melted and flows between the refrigerant tube and the first coupling portion. The method of claim 7, wherein
And the refrigerant tube and the filler metal are inserted into the first coupling part and the second coupling part in contact with each other. The method of claim 9,
The refrigerant tube extends in the first direction,
The filler metal extends in the first direction to a length corresponding to the refrigerant tube,
The refrigerant tube and the filler metal are arranged so that one side is in contact with each other side by side in the first direction, is inserted into the first coupling portion and the second coupling portion. The method of claim 10,
The filler metal is a heat exchanger manufacturing method characterized in that it is disposed in contact with the upper portion of the refrigerant tube. The method of claim 7, wherein
The refrigerant tube,
A plurality of first refrigerant tubes extending in a first direction and disposed in a second direction;
A second refrigerant tube connecting the pair of first refrigerant tubes disposed adjacent to the second direction; And
A tube coupling part in which the first refrigerant tube and the second refrigerant tube are in contact with each other;
Heat exchanger manufacturing method comprising a. The method of claim 12,
The filler metal is disposed in the tube coupling portion, the heat exchanger manufacturing method characterized in that the first refrigerant tube and the second refrigerant tube is fixed and coupled by the melting of the filler metal. The method of claim 12,
The filler metal is a heat exchanger manufacturing method characterized in that extending in the first direction longer than the first refrigerant tube. The method of claim 7, wherein
The heat exchange fins, the refrigerant tube and the filler metal are made of aluminum,
Melting point of the filler metal is lower than the melting point of the heat exchange fins and the refrigerant tube.

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