KR20080089973A - Air conditioner and heat exchanger manufacturing method of the same - Google Patents

Abstract

An air conditioner and a method for manufacturing a heat exchanger thereof are provided to prevent corrosion or damage that may occur when directly conjugates the heat exchanger to header, which is made of different materials, by communicating the refrigerant pipe to the header with a connector. An air conditioner comprises a refrigerant pipe(2), headers, and connectors(50). The refrigerant pipe passes the refrigerant and is made of aluminum. The headers pass the refrigerant and are made of copper. The connectors, on which the aluminum pipe is integrally conjugated to the copper pipe, communicate the refrigerant pipe to the headers. The aluminum pipe is conjugated to the refrigerant pipe and the copper pipe is conjugated to the headers.

Description

Air conditioner and heat exchanger manufacturing method of the same

1 is a perspective view of one embodiment of a heat exchanger of an air conditioner according to the present invention;

2 is an exploded perspective view of an embodiment of a heat exchanger of an air conditioner according to the present invention;

3 is a cross-sectional view of the connector shown in FIG. 1 coupled with a refrigerant pipe and a header;

4 is an enlarged cross-sectional view of an essential part of another embodiment of a heat exchanger of an air conditioner according to the present invention;

5 is a perspective view of one embodiment of a heat exchanger of an air conditioner according to the present invention;

6 is an exploded perspective view of one embodiment of a heat exchanger of an air conditioner according to the present invention;

7 is a view showing a process sequence of an embodiment of a heat exchanger manufacturing method of an air conditioner according to the present invention;

8 is a view showing a process sequence of another embodiment of the heat exchanger manufacturing method of the air conditioner according to the present invention.

<Explanation of symbols on main parts of the drawings>

2: refrigerant tube 8: return band

10: heating fin 20,30: head

50,50 ′: Connector 52,52 ′: Aluminum tube

54,54 ': Copper pipe 56: Reduction part

58: inclined portion 60: straight portion

90,100: HVAC parts

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner and a method of manufacturing the heat exchanger, and more particularly, to an air conditioner and a method of manufacturing the heat exchanger for connecting an aluminum refrigerant pipe and a copper header to a connector in which different metals are bonded together. .

In general, an air conditioner is a device that cools or heats a room by using a refrigeration cycle device including a compressor, a condenser, an expansion device, and an evaporator. The compressor, the condenser, the expansion device, The evaporator is connected to the refrigerant pipe.

The condenser and the evaporator are formed with a flow path through which the refrigerant passes and act as a heat exchanger where the refrigerant condenses or evaporates as it passes through the flow path to exchange heat with the surroundings. Such a heat exchanger includes a fin-tube type heat exchanger and a flat tube heat exchanger.

The fin-and-tube heat exchanger includes a refrigerant pipe having a flow path through which a refrigerant passes, a heat transfer fin coupled with the refrigerant pipe to increase heat transfer capability, and a header through which a refrigerant passes through or flows out of the refrigerant pipe. do.

The refrigerant pipe is made of copper so as to have high heat transfer performance.

On the other hand, Korean Utility Model Publication No. 20-0295420 discloses a fin-and-tube type heat exchanger having a refrigerant tube made of aluminum, which is cheaper than copper, in order to minimize the material cost of the heat exchanger.

The fin-and-tube heat exchanger is manufactured by processing an aluminum sheet in a pipe shape, but a circular groove for expanding an inner surface area of the aluminum sheet is formed through rolling, or processed in a process of processing an aluminum sheet in a pipe shape.

However, the heat exchanger according to the prior art has a problem in that it is difficult to join the refrigerant tube and the header of different materials when the refrigerant tube is formed of aluminum and the header is formed of an aluminum material.

The present invention has been made to solve the problems of the prior art, when the material of the refrigerant pipe and the header of the heat exchanger is different, it is easy to connect the refrigerant tube and the header to the connector and the header of the heterogeneous material, respectively. It is an object of the present invention to provide an air conditioner that can be easily communicated.

Another object of the present invention is to provide an air conditioner that can be easily connected to the air conditioning parts and the heat exchanger by connecting a connector with a different material bonded to the air conditioning parts and the heat exchanger when the air conditioning parts connected to the heat exchanger and the heat exchanger is different. It is.

Still another object of the present invention is to provide a method of manufacturing a heat exchanger of an air conditioner, which can firmly join a connector without using a welding material.

Air conditioner according to the present invention for solving the above problems and the refrigerant tube made of aluminum; A copper header; An aluminum tube and a copper tube are integrally joined, the aluminum tube is joined to the refrigerant tube, and the copper tube is joined to the header, and the connector connects the refrigerant tube and the header.

An air conditioner according to the present invention includes a heat exchanger through which a refrigerant passes and made of aluminum; An air-conditioning component passing through the refrigerant and made of copper; An aluminum tube and a copper tube are integrally joined to each other, the aluminum tube is joined to the heat exchanger, and the copper tube is joined to the air conditioning component, and the connector connects the heat exchanger and the air conditioning component.

The air conditioning component is a valve for controlling a refrigerant flowing into or out of the heat exchanger.

The air conditioning component is a refrigerant pipe through which a refrigerant flows into the heat exchanger or a refrigerant flowing out of the heat exchanger passes.

The connector is a process joint of an aluminum tube and a copper tube.

In the connector, the aluminum pipe is welded to the refrigerant pipe, and the copper pipe is welded to the header.

The connector further includes a heat shrink tube disposed at the junction of the aluminum tube and the copper tube.

The connector further includes an rust preventive paint coated on the junction of the aluminum tube and the copper tube.

The method for manufacturing a heat exchanger of an air conditioner according to the present invention includes a step of shrinking a copper pipe to reduce a part of the copper pipe; A copper pipe shrinking part inserting step of inserting a shrinking part of the copper pipe into an aluminum tube after the copper pipe shrinking step; And a process joining step of process joining the shrinkage portion of the copper pipe and the aluminum tube after the inserting the copper tube shrinkage part.

The shrinking of the copper pipe may be performed such that the shrinking part includes a straight portion smaller than the diameter of the aluminum tube and an inclined portion contacting an end portion of the aluminum tube.

In the copper tube shrinking step, the straight portion is reduced to a size having a gap with the aluminum tube so that a spark can be generated between the outer circumference of the straight portion and the inner circumference of the aluminum tube during the process bonding step.

The process joining step is energized heating that applies current to the copper pipe and the aluminum pipe.

The process joining step is an induction heating applying high frequency to the copper tube and the aluminum tube.

After the process bonding step is completed, and further comprising a heat shrink tube coupling step of coupling a heat shrinkable tube (Heat shrinkable tube) to the junction of the copper tube and the aluminum tube.

After the heat-shrink tube coupling step, further comprising a bonding step of bonding the aluminum tube to the refrigerant tube made of aluminum, and the copper tube to the header of the copper material.

After the heat-shrink tube joining step, the anti-corrosive paint coating step of painting the anti-corrosive paint to the junction of the copper tube and the aluminum tube further.

After the anti-corrosion paint painting step, further comprising a bonding step of bonding the aluminum tube to the aluminum refrigerant tube, and the copper tube to the copper header.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of one embodiment of a heat exchanger of an air conditioner according to the present invention, and FIG. 2 is an exploded perspective view of an embodiment of a heat exchanger of an air conditioner according to the present invention.

In the air conditioner according to the present embodiment, the heat exchanger 1 is evaporated or condensed while being exchanged with the surroundings while the refrigerant passes. As shown in FIGS. 1 and 2, the refrigerant pipe 2 and the heat transfer fin ( 10), the headers 20 and 30, and the connector 50, and the refrigerant pipe 2 is usually formed of aluminum which is cheaper than copper.

The heat exchanger 1 is applicable to the evaporator and also applicable to the condenser, but the effect of the heat transfer performance of the evaporator on the thermal efficiency of the refrigeration cycle is greater than the heat transfer performance of the condenser, and the refrigerant tube of the evaporator is aluminum When the material is used, the thermal efficiency may be excessively lowered. Therefore, the refrigerant tube 2 of the condenser, which does not significantly affect the thermal efficiency of the evaporator, is formed from aluminum, and the refrigerant tube of the evaporator is made of aluminum. It is preferable to mold with copper which is excellent in heat transfer performance.

The heat exchanger 1 is provided with a plurality of refrigerant pipes 2, all of the plurality of refrigerant pipes 2 may be connected in series through the return band 8 to form a single flow path, It is also possible to form a plurality of flow paths by connecting a plurality of groups of the refrigerant pipes 2 connected in series through 8) in parallel, and it is described that the plurality of flow paths are provided in one heat exchanger.

The heat transfer fins 10 are combined with the refrigerant pipes 2 to allow heat exchange between the refrigerant pipes 2 and the air around the heat transfer fins 10. The heat transfer fins 10 are formed in a flat shape and the refrigerant pipes 2 are inserted and fastened. A plurality of fastening holes are formed.

End plates 12 and 14 are disposed at both sides of the heat transfer fin 10.

End plates 12 and 14 are provided with a plurality of fastening holes corresponding to the fastening holes of the heat transfer fins 10.

The headers 20 and 30 are discharged from the first header 20 and the refrigerant pipe 2 of the various flow paths, which serve as a kind of dispenser for distributing the refrigerant supplied from the expansion mechanism to the refrigerant pipes 2 of the various flow paths. It consists of a second header (30) which functions as a kind of collector (30) to collect the refrigerant to be supplied to the compressor.

The headers 20 and 30 are formed in a cylindrical shape or hemispherical shape.

The headers 20 and 30 may be formed of aluminum, may be formed of copper, and will be described below by being limited to those made of copper.

The headers 20 and 30 are formed with a coolant outlet pipe 21 through which the coolant flows out and a coolant inlet pipe 31 through which the coolant flows.

The connector 50 allows the refrigerant pipe 2 and the headers 20 and 30, which are different materials, to communicate with each other through the connector 50 without being directly bonded to each other. The refrigerant pipe 2 and the headers 20 and 30 are connected to each other. Are each connected to.

3 is a cross-sectional view of the connector shown in FIG. 1 combined with a refrigerant pipe and a header.

The connector 50 has a portion 52 joined to the refrigerant pipe 2 made of an aluminum material of the same material as the refrigerant pipe 2, and a portion 54 joined to the header 20 and 30 is a header 20. It is made of a copper material of the same material as the (30).

The connector 50 is continuously connected to the aluminum tube 52 and the copper tube 54 in the longitudinal direction, and is not connected by a welding material or a separate fastener, but by a process bonding using dissolution fusion transformation properties of dissimilar metals. Are bonded.

Here, the eutectic joining can be conducted by applying current to the aluminum pipe 52 and the copper pipe 54, and induction heating can also be applied to the aluminum pipe 52 and the copper pipe 54.

The connector 50 is a part of the aluminum tube 52 and the copper tube 54 is inserted into the other after the process joining, typically, since the copper tube 54 is easier to deform than the aluminum tube 52 copper The end of the tube 54 is reduced, and this reduction portion 56 is inserted into one end of the aluminum tube 52.

On the other hand, the copper pipe 54 has an inclined portion 58 in which the reduction portion 56 is joined to the end of the aluminum tube 52 and a diameter larger than the inner circumference of the aluminum tube 52 and disposed inside the aluminum tube 52. This small straight part 60 is included.

In the connector 50, the opposite side 52B of the aluminum pipe 52 is joined to the end of the refrigerant pipe 2 by inserting an end 52B of the aluminum pipe 52. The refrigerant pipe 2 is connected to the end of the aluminum pipe of the connector 50. An expansion pipe portion 2A into which the 52 is inserted is formed, and the expansion pipe portion 2A of the refrigerant pipe 2 and the aluminum pipe 52 are welded and joined by a welding agent 52C.

The connector 50 is connected to the refrigerant inlet tube 31 or the refrigerant outlet tube 21 of the headers 20 and 30 in the copper pipe 54 opposite to the junction 54A. An expansion pipe portion 54B is formed at a portion into which the coolant inlet pipe 31 or the coolant outlet pipe 21 is inserted, and the coolant inlet pipe 31 or the coolant outlet pipe of the headers 20 and 30 ( 21 and the expansion pipe portion 54B of the copper pipe 54 are welded and joined by the welding agent 54C.

On the other hand, the heat exchanger 1 of the air conditioner according to the present embodiment, the tube 70 which is covered with the joint to prevent corrosion of the joint 52A and 54A of the aluminum tube 52 and the copper tube 54. It further includes.

The tube 70 is made of a heat shrink tube to be in close contact with the joint while being contracted when heat is applied.

4 is an enlarged cross-sectional view of an essential part of another embodiment of a heat exchanger of an air conditioner according to the present invention.

In the heat exchanger 1 of the air conditioner according to the present embodiment, the anti-corrosion paint 80 is made of the aluminum tube 52 and the copper tube 54 to prevent corrosion of the joint between the aluminum tube 52 and the copper tube 52. The other parts of the air conditioner heat exchanger, which are painted at the junction of the other than the rust preventive paint, are the same as or similar to those of the air conditioner heat exchanger of the embodiment of the present invention, and thus detailed description thereof is omitted.

The rust preventive paint 80 may be coated instead of the tube 60 of the embodiment of the present invention, as well as the rust preventive paint 80 is coated on the junction between the aluminum pipe 52 and the copper pipe 52, and the outside thereof. Of course, it is also possible to arrange the tube 70 of the embodiment of the present invention.

Figure 5 is a perspective view of one embodiment of a heat exchanger of the air conditioner according to the present invention, Figure 6 is an exploded perspective view of one embodiment of a heat exchanger of the air conditioner according to the present invention.

The air conditioner according to the present embodiment includes a heat exchanger 1 'made of an aluminum material through which a refrigerant passes; An air conditioning part (90) (100) made of copper and passed through a refrigerant; And a connector 50 'for communicating the heat exchanger 1' and the air conditioning component 90, 100.

 The heat exchanger 1 'is the refrigerant pipe 2, the heat transfer fins 10, the end plates 12, 14 and the header 20' as in the first embodiment of the heat exchanger of the air conditioner according to the present invention. And a flow path through which the refrigerant passes, that is, both the refrigerant pipe 2 and the headers 20 'and 30' are made of aluminum, or the refrigerant pipe 2 is made of copper and the header 20 ' 30 'is made of aluminum.

The air conditioner parts 90 and 100 may be formed of a valve such as a service valve or a solenoid valve that regulates the refrigerant flowing into the heat exchanger 1 'or flowing out of the heat exchanger 1'. It is also possible to comprise a refrigerant pipe through which the refrigerant flows into '' or the refrigerant flowing out from the heat exchanger 1 'passes, which will be described below as being a valve.

The connector 50 'is joined with an aluminum tube 52' and a copper tube 54 'integrally, and the aluminum tube 52' is joined with a heat exchanger 1 ', in particular with a header 20', 30 '. The copper pipe 54 'is joined to the barb.

The detailed structure of the connector 50 'is the same as that of the connector of the first embodiment of the heat exchanger of the air conditioner according to the present invention, in which the connector 50' is a process joint of an aluminum tube 52 'and a copper tube 54'. The aluminum pipe 52 'is brazed and welded to the refrigerant inlet pipe 22' or the refrigerant outlet pipe 32 'of the headers 20' and 30 ', and the copper pipe 54' is connected to the pipe portion of the valve. 91) 101 and brazing welding.

On the other hand, the air conditioner according to the present embodiment further includes a tube 70 'which is covered by the joint to prevent corrosion of the joint between the aluminum tube 52' and the copper tube 54 '.

The tube 70 'is made of a heat shrink tube so as to be in close contact with the joint while shrinking when heat is applied.

7 is a view showing a process sequence of an embodiment of a heat exchanger manufacturing method of an air conditioner according to the present invention.

In the method for manufacturing a heat exchanger of the air conditioner according to the present embodiment, as shown in FIG. 7, the return band 8 is connected to the refrigerant pipe 2 after the refrigerant pipe 2 is largely inserted into the heat transfer fin 10. A header production step (S4) for producing a refrigerant pipe connection step (S1) (S2) (S3) and a header (20) (30); A connector fabrication step (S5) (S6) (S7) (S8) for producing the connector 50; It comprises a connector joining process (S9) (S10) which joins the connector 50 to the refrigerant pipe 2 and the header 20,30.

Here, the refrigerant pipe connection step (S1) (S2) (S3), the header manufacturing step (S4) and the connector manufacturing step (S5) (S6) (S7) (S8) may be performed sequentially one by one, It is also possible for each process to be carried out simultaneously.

On the other hand, the connector joining step (S9) (S10) is a refrigerant pipe connection step (S1) (S2) (S3), the header manufacturing step (S4) and the connector manufacturing step (S5) (S6) (S7) (S8) It is carried out after completion.

Hereinafter, each process will be described in detail for specific implementation as follows.

Refrigerant pipe connection process (S1) (S2) (S3) according to the present embodiment, the refrigerant pipe forming step (S1) for extruding or drawing the refrigerant pipe 2 in an aluminum material to form a hollow cylindrical shape (S1), and the refrigerant pipe Refrigerant tube inserting step (S2) for inserting the aluminum refrigerant tube 2 formed in the molding step into the fastening hole of the heat transfer fin 10 and the fastening hole of the end plate 12, 14, and the refrigerant pipe insertion step Thereafter, the refrigerant pipe 2 is expanded to include a refrigerant pipe expansion step S3 of integrally assembling the refrigerant pipe 2 with the heat transfer fins 10 and the end plates 12 and 14.

The header fabrication process (S4) is formed of a copper material separately from the header pipe connection process (S1) (S2) (S3) and the connector fabrication process (S5) (S6) (S7) (S8). To make.

Connector manufacturing process (S5) (S6) (S7) (S8) is a copper pipe shrinkage | reduction step S5 which shrinks the copper pipe 54, and the reduction part 56 of the copper pipe 54 is made into the aluminum pipe 52 Copper tube insertion step (S6) to be inserted into the inner end of the (), the process bonding step (S7) of the process joining the reduced portion 56 and the aluminum tube 52 of the copper tube 54, and the aluminum tube bonded to the process And a heat shrink tube heating step S8 of wrapping the joints 52A and 54A of the 52 and the copper pipe 54 with the heat shrink tube 70 and then heating and shrinking the heat.

The copper pipe reduction step S5 may include a straight portion 60 having a reduction portion smaller than the diameter of the aluminum tube 52 and an inclined portion 58 to be joined to an end portion of the aluminum tube 52. In addition, the linear portion 60 is reduced to a size having a gap with the aluminum tube 52 so that a spark can be generated between the outer circumference of the linear portion 60 and the inner circumference of the aluminum tube 52 during the process bonding step. do.

Here, the gap is a space in which sparks are generated between the inner circumference of the aluminum tube 52 and the shrinking portion 56 of the copper tube 54 during the process bonding, and the shrinking portion is formed so that the spark is uniformly formed without being concentrated at a specific site. (56) It is particularly preferable that the straight portion 60 is formed on the inner circumference of the aluminum tube 52 to be spaced apart at regular intervals in the circumferential direction.

The connector bonding step (S9) (S10) (S11) (S12) (S13) expands both ends of the assembly bonded in the connector fabrication step (S5), S6, S7, and S8 and expands the expansion portion 52B ( An expansion pipe step S9 for forming 54B), an aluminum pipe insertion step S10 for inserting the aluminum pipe 52 into the expansion pipe part 2A of the refrigerant pipe 2, and an expansion pipe part of the copper pipe 54 ( A header insertion step (S11) for inserting the coolant inlet pipe 31 or the coolant outlet pipe 21 of the headers 20 and 30 into the 54B), and the expansion pipes of the aluminum pipe 52 and the coolant pipe 2 ( Aluminum pipe welding joint step (S12) for welding the 2A), the expansion pipe portion 54B of the copper pipe 54 and the refrigerant inlet pipe 31 or the refrigerant outlet pipe 21 of the header 20, 30 Copper welding step (S13) for welding welding.

Here, the refrigerant pipe inserting step (S10) and the header inserting step (S11) may be carried out simultaneously or sequentially, and the aluminum pipe welding joining step (S12) and the copper pipe welding joining step (S13) may be performed simultaneously or sequentially. Can be.

8 is a view showing a process sequence of another embodiment of the heat exchanger manufacturing method of the air conditioner according to the present invention.

In the method for manufacturing a heat exchanger of the air conditioner according to the present embodiment, as shown in FIG. 8, the connector fabrication process S5, S6, S7, and S8 reduces a copper tube that shrinks the copper tube 54. Step (S5), the copper tube insertion step (S6) for inserting the reduction portion 56 of the copper tube 54 into the end of the aluminum tube 52, and the reduction portion 56 of the copper tube 54 and Antirust paint which coats the rust-preventive paint 80 in the process joining step S7 of carrying out the process joining of the aluminum pipe 52, and the joining parts 52A and 54A of the eutectic joined aluminum pipe 52 and the copper pipe 54. Including the painting step (S8 '), and other components other than the anti-rust paint painting step (S8') is the same as the heat exchanger manufacturing method of the air conditioner according to the embodiment of the present invention is the same, so use the same reference numerals for Detailed description will be omitted.

On the other hand, the heat exchanger of the air conditioner according to the present invention, the refrigerant pipe (2) itself is made of a combination of an aluminum refrigerant pipe and a copper refrigerant pipe, the aluminum refrigerant pipe and the copper refrigerant pipe (50) in which the heterogeneous material is a process junction It is also possible to communicate by, and of course, the various implementations are possible within the technical scope to which this invention belongs.

In the air conditioner of the present invention configured as described above, the refrigerant pipe through which the refrigerant passes is formed of aluminum, and the header is formed of copper, and the aluminum pipe joined to the refrigerant pipe and the copper pipe joined to the header are joined. Since the refrigerant pipe and the header communicate with each other through the connector, it is possible to prevent corrosion or breakage that may occur when the headers and the headers having different materials are directly bonded to each other.

In the air conditioner of the present invention, the heat exchanger is formed of an aluminum material, and an air conditioning part connected to the heat exchanger is formed of a copper material, and an aluminum tube joined to the heat exchanger and a copper pipe joined to the air conditioning part are joined to the heat exchanger through a connector. Since the air conditioning parts are in communication, there is an advantage that can prevent corrosion or damage that may occur when the heat exchanger and the air conditioning parts are directly joined with different materials.

In addition, the air conditioner according to the present invention is an aluminum tube and a copper tube of the connector process bonding, there is an advantage in that a separate welding material is unnecessary for joining the aluminum tube and the copper tube is minimized.

The air conditioner according to the present invention further includes a heat shrink tube in which the connector is disposed at the junction of the aluminum tube and the copper tube or further includes an anti-rust paint coated at the junction of the aluminum tube and the copper tube, thereby preventing corrosion of the connector joint. There is an advantage to this.

In addition, the method for manufacturing a heat exchanger of an air conditioner according to the present invention is easy to work by shrinking the copper tube among the copper tube and the aluminum tube, the copper tube and aluminum after inserting the reduced portion of the copper tube into the inside of the aluminum tube Process joining the pipe has the advantage that the welding material is unnecessary and the debris generated during the joining is minimized.

In addition, the method for manufacturing a heat exchanger of the air conditioner according to the present invention, the copper tube is formed in the shrinking step of the copper tube is formed to include a straight portion smaller than the diameter of the aluminum tube, and the inclined portion in contact with the end of the aluminum tube, There is an advantage of easy insertion work.

In addition, the heat exchanger manufacturing method of the air conditioner according to the present invention, in the shrinking step of the copper pipe, the linear portion is reduced to the size having a gap with the aluminum tube so that the spark between the outer circumference of the linear portion and the inner circumference of the aluminum tube during the process joining step Since it is easily generated, there is an advantage of easy process bonding.

In addition, the method for manufacturing a heat exchanger of an air conditioner according to the present invention further includes a connector joining step of welding and joining the aluminum tube to a refrigerant tube made of aluminum and welding the copper tube to a header made of copper. There is an advantage that the refrigerant tube and the header of the material can be easily communicated.

Claims (18)

A refrigerant passage and a refrigerant tube made of aluminum; A refrigerant passage and a copper header; And a connector in which an aluminum tube and a copper tube are integrally joined, the aluminum tube is joined to the refrigerant tube, and the copper tube is joined to the header to communicate the refrigerant tube and the header. A heat exchanger passing through the refrigerant and made of aluminum; An air-conditioning component passing through the refrigerant and made of copper; And a connector in which an aluminum tube and a copper tube are integrally joined, the aluminum tube is joined to the heat exchanger, and the copper tube is joined to the air conditioning component to communicate the heat exchanger and the air conditioning component. The method of claim 2, The air conditioner is an air conditioner is an air conditioner is a valve for regulating the refrigerant flowing into or out of the heat exchanger. The method of claim 2, The air conditioner is an air conditioner that allows a refrigerant to flow into the heat exchanger or a refrigerant pipe through which the refrigerant flowing out of the heat exchanger passes. The method according to claim 1 or 2, The connector is an air conditioner, the aluminum pipe and the copper pipe process bonded. The method according to claim 1 or 2, The copper pipe comprises an inclined portion joined to an end of the aluminum tube, and a straight portion having a gap between the inner tube and the inner circumference of the aluminum tube. The method according to claim 1 or 2, The connector is an air conditioner in which the aluminum pipe is welded to the refrigerant pipe and the copper pipe is welded to the header. The method according to claim 1 or 2, The connector further comprises a heat shrink tube surrounding the junction of the aluminum tube and the copper tube. The method according to claim 1 or 2, The connector is an air conditioner coated with rust preventive paint at the junction of the aluminum pipe and the copper pipe. A copper pipe shrinking step of shrinking a portion of the copper pipe; A copper pipe shrinking part inserting step of inserting a shrinking part of the copper pipe into an aluminum tube after the copper pipe shrinking step; And a process joining step of jointly joining the shrinkage part of the copper pipe and the aluminum tube after the copper tube shrinkage part inserting step. The method of claim 10, Wherein the copper tube shrinking step is a heat exchanger manufacturing method of an air conditioner, wherein the reducing portion is formed to include a straight portion smaller than the diameter of the aluminum tube and the inclined portion to be joined to the end of the aluminum tube. The method of claim 11, The copper tube shrinking step is a heat exchanger manufacturing of an air conditioner in which the linear portion is reduced to a size having a gap with the aluminum tube so that a spark can be generated between the outer circumference of the straight portion and the inner circumference of the aluminum tube during the process bonding step Way. The method of claim 10, The process joining step is a heat exchanger manufacturing method of the air conditioner is the energized heating to apply current to the copper tube and aluminum tube. The method of claim 10, The process joining step is a heat exchanger manufacturing method of the air conditioner is induction heating applying high frequency to the copper tube and aluminum tube. The method of claim 10, And a heat shrinkable tube coupling step of coupling a heat shrinkable tube to a joint portion of the copper tube and the aluminum tube after the process bonding step is completed. The method of claim 15, And a connector joining step of welding the aluminum tube to an aluminum refrigerant tube after the heat shrink tube joining step, and welding the copper tube to a header of a copper material. The method of claim 10, After the heat-shrink tube coupling step, the method of manufacturing a thermal bridge ventilation of the air conditioner further comprising the anti-corrosive paint coating step of coating the anti-corrosive paint to the junction of the copper tube and the aluminum tube. The method of claim 17, And a connector joining step of welding the aluminum tube to an aluminum refrigerant pipe after the anti-corrosion paint coating step and welding the copper tube to a header of a copper material.

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