KR20080017756A - Header tank and heat exchanger including the same - Google Patents

Abstract

A header tank and a heat exchanger including the same are provided to form joining parts between first and second header pipes at side surfaces which are in close contact with each other, thereby preventing corrosion of the joining parts due to exposure. A header tank includes first and second header pipes(110) having a plurality of tube insertion holes formed at bottom surfaces and independent refrigerant paths formed inside in the longitudinal direction. Finishing barrier walls(140) are mounted at both ends of the header pipes. An inlet pipe(120a) penetrates the first header pipes and is inserted into the second header pipes. An outlet pipe(120b) is inserted into the first header pipes. The first and second header pipes are fixed such that the side walls thereof are in close contact with each other, wherein the side walls are formed with through-holes(114) and insertion holes(116) for the penetration and insertion of the inlet/outlet pipes. The inlet/outlet pipes are formed with inlet/outlet paths inside, horizontal penetration parts(121) to be inserted into the first or second header pipes and circular expansion parts(122) extended from the horizontal penetration part with increased inner diameter.

Description

HEADER TANK AND HEAT EXCHANGER INCLUDING THE SAME}

1 is a plan view showing a header tank according to the prior art.

Figure 2 is an exploded perspective view showing a heat exchanger according to the present invention.

Figure 3 is a perspective view showing a header tank according to the present invention.

Figure 4 is a plan view showing a header tank according to the present invention.

Figure 5a is a cross-sectional view of the header pipe formed at the junction.

FIG. 5B is a cross-sectional view of the header pipe formed by cutting a portion “AA” of FIG. 4 and having a junction portion formed on a sidewall thereof;

6 is a cross-sectional view of the header pipe shown by cutting the "BB" portion of FIG.

FIG. 7 is a cross-sectional view of the header pipe shown by cutting the “CC” portion of FIG. 4. FIG.

Figure 8 is a side view showing the entry and exit pipe coupled to the header tank according to the present invention.

Figure 9 is a state diagram showing a flow in which the refrigerant flows in the heat exchanger according to the present invention.

10 is a state diagram showing a flow in which the refrigerant flows in the heat exchanger according to a modification of the present invention.

11 is a state diagram showing a flow in which the refrigerant flows in the heat exchanger according to another modification of the present invention.

<Code Description of Main Parts of Drawing>

100: header tank 110: header pipe

120: entrance and exit pipe 130: baffle

140: finishing bulkhead 150: refrigerant flow path

160: entry and exit euro

The present invention relates to a header tank and a heat exchanger including the same, wherein a plurality of inlet and outlet pipes are inserted in a transverse direction of a header pipe in which sidewalls of the first header pipe and the second header pipe are tightly fixed to each other to prevent leakage of refrigerant and The present invention relates to a header tank capable of effective space utilization and a heat exchanger including the same.

In general, the vehicle heat exchanger is installed in the air conditioning system and the engine coolant system to change the refrigerant and the coolant to a desired temperature through the flow of external air. It is provided, the end of the tube is made of a structure in which the header pipe is connected.

Hereinafter, a conventional heat exchanger will be described with reference to the accompanying drawings.

1 shows an example of a conventional heat exchanger configuration.

As shown in FIG. 1, a conventional heat exchanger includes a plurality of tubes 3 having heat radiating fins 4 inserted therein to form a core 5, and a pair of header tanks 1 at both ends of the core 5. (2) is installed, and any one of these header tanks (1) may be connected to the refrigerant pipes (6) and (7) through which the refrigerant flows in and out of the adapter (8).

At this time, the conventional header tank (1), (2) is the header body 10 is manufactured by the extrusion molding method so as to form an U-shaped cross section of the upper side, and the header plate 20 for covering the upper side of the header body (10) And, the partition member 50 to insulate the inner space of the header body 10 in the longitudinal direction along the inner longitudinal direction of the header body 10, coupled to the interruption of the header body 10 of the header body 10 It comprises a suspension baffle 30 to isolate the inner space in the lateral direction, and a pair of finishing baffles 40 for sealing the longitudinal ends of the header body (10). At this time, the header plate 20 is formed with a plurality of insertion holes 21 in communication with the distal end of the tube 3, the partition member 50 is formed with a plurality of through-holes 52 through which the refrigerant passes, the refrigerant pipe (6), (7) is formed in the closing baffle 40 of the header tank 1 is connected to the inlet through-hole 41 for the introduction of the refrigerant and the discharge through-hole 42 for the outlet of the coolant, respectively.

However, the conventional header tanks (1) and (2) having such a configuration isolate the header plate 10 and the inner space of the header body 10 to cover the header body 10 and the upper side of the header body 10 in the longitudinal direction. When the partition member 50 is configured to be assembled to each other, where the cladding material is applied to the portion to be bonded and brazing is made, if the cladding material of the brazing portion is uncoated or a fine gap is generated in these joints, There was a fear that the junction between them could be made incompletely. As a result, leaks of the refrigerant may occur at incomplete joints of the header tanks 1 and 2, and thus, the performance of the heat exchanger may be degraded.

In addition, the conventional header tanks (1) and (2) are assembled and combined after the header body 10, the header plate 20, and the partition member 50 are separately manufactured. There was a problem that the number is increased, productivity is lowered, and manufacturing costs are increased.

In addition, the header tank 1 to which the refrigerant pipes 6 and 7 are connected is connected to the refrigerant pipes 6 and 7 through the inlet hole 41 and the outlet hole 42 formed in the closing baffle 40. As it is connected, the refrigerant pipes 6 and 7 are coupled in the longitudinal direction of the header tank 1 to extend the overall length of the heat exchanger. Accordingly, when the heat exchanger of such a configuration is mounted on the vehicle, there is a problem that effective space utilization is not achieved in the vehicle.

An object of the present invention is to solve the above-mentioned problems of the prior art, the present invention is to provide a heat exchanger including a header tank to improve the quality of the product to prevent leakage of the refrigerant.

In order to achieve the above object, the present invention provides a header pipe including a first header pipe and a second header pipe having a plurality of tube insertion holes into which a tube is inserted into a lower surface, and having independent refrigerant passages formed in an inner longitudinal direction thereof. And an inlet pipe formed of a closing partition wall installed at both ends of the header pipe, an inlet pipe inserted through the first header pipe and inserted into a second header pipe and an outlet pipe inserted into the first header pipe. .

At this time, the first and second header pipes are each composed of a tubular pipe and closely fixed to each other through sidewalls, and fold the plated cladding to form respective header pipes, and to be coupled to each other by clad melting when integral brazing. Can be configured. In addition, the first and second header pipes are in contact with the folded portion is preferably configured to be located on the close side wall in which the first and second header pipes are in close contact with each other.

In the first header pipe, through holes through which the inlet pipe passes are formed on both side walls, insertion holes into which the outlet pipe is inserted are formed on one side wall, and insertion holes corresponding to the through holes are formed in the second header pipe. It is formed on the side wall in close contact with the header pipe. The inlet / outlet pipe may include a horizontal through part having an inlet / outlet path formed therein and inserted into the first header pipe or the second header pipe, and a circular expander extending from the horizontal through part and having an enlarged inner diameter.

Here, the bead portion is further formed between the horizontal through portion and the circular expansion portion, the diameter of the circular expansion portion of the inlet pipe is preferably formed smaller than the diameter of the circular expansion portion of the outlet pipe.

The heat exchanger according to the present invention has an upper header tank having the above-described structure, and sidewalls of the first header pipe and the second header pipe which are disposed opposite to the upper header tank and in which a refrigerant flow path is formed in the inner longitudinal direction are fixed to each other. And a lower header tank disposed at both ends to surround the finishing bulkhead, a plurality of tubes disposed in parallel between the upper header tank and the lower header tank, and heat dissipation fins provided between the tubes. have. In addition, a plurality of coupling units may be formed at edges of the finishing partitions installed at both ends of the first header pipe and the second header pipe.

In addition, a middle portion of the upper header tank is provided with a baffle for isolating the upper header pipe in the lateral direction, an inlet and outlet pipe is installed at one side of the upper header tank, and a second side wall of the upper header tank is provided. A plurality of communication paths communicating with the first header pipe and the second header pipe are formed, and the refrigerant flowing from the inflow pipe may flow through the upper header tank and the lower header tank by four passes and be discharged through the outlet pipe. .

In addition, a baffle for isolating the upper header pipe in the lateral direction is installed at one side of the upper header tank in which the entry and exit pipe is installed, and a baffle for isolating the lower header pipe in the lateral direction at the other side of the lower header tank. And a plurality of communication paths communicating with the first header pipe and the second header pipe are formed at the side wall of the other side of the lower header tank, and the refrigerant flowing from the inflow pipe is connected between the upper header tank and the lower header tank. The six-pass flow may be discharged through the outlet pipe.

In addition, inlet and outlet pipes are installed in the middle of the upper header tank, and baffles for separating the upper header pipe in the lateral direction are provided at one side and the other side of the upper header tank, respectively, and at both sides of the upper header tank. A plurality of communication paths are formed on the side wall to communicate the first header pipe and the second header pipe, and the refrigerant flowing from the inflow pipe is separated into both upper header tanks, and thereafter, a plurality of independent communication paths are formed between the upper header tank and the lower header tank. Flow through the passage can be discharged through the outlet pipe.

Based on the accompanying drawings, a heat exchanger and a header tank according to the present invention will be described in detail.

Figure 2 is a view showing an exploded perspective view of the heat exchanger according to the present invention, Figure 3 is a view showing a combined perspective view of the header tank according to the present invention, Figure 4 is a plan view showing a header tank according to the present invention, Figure 4 is a plan view showing a header tank according to the present invention. In addition, Figure 5a is a cross-sectional view of the header pipe formed in the junction portion, Figures 5b-7 is a cross-sectional view of the header pipe cut in the "AA" portion, "BB" portion and "CC" portion of Figure 4 respectively. to be.

As shown in FIG. 2, the heat exchanger according to the present invention includes a lower header tank 100 ′, an upper header tank 100 into which the inlet and outlet pipes 120 are inserted in a transverse direction, and an upper header tank 100 and a lower side. It comprises a plurality of tubes (3) arranged in parallel between the header tank (100 '), and a heat radiation fin (4) provided between the tubes (3). At this time, the lower surface of the upper header tank 100 and the upper surface of the lower header tank 100 'is formed with a plurality of tube insertion holes 119 into which the tube 3 is inserted.

For example, the lower header tank 100 'includes a header pipe 110 in which the first header pipe 110a and the second header pipe 110b having independent refrigerant passages 150 in the inner longitudinal direction are fixed to each other, and the header. And a baffle 130 which horizontally insulates the refrigerant passage 150 formed in the pipe 110, and a closing partition wall 140 closing both ends of the header pipe 110.

In addition, the upper header tank 100, the header pipe 110 is spaced apart from the lower header tank 100 'by a predetermined distance, the inlet pipe 120a and the outlet pipe 120b inserted in the transverse direction of the header pipe 110. ), A baffle 130 for isolating the refrigerant flow path 150 formed in the header pipe 110 in the lateral direction, and a closing partition wall 140 for closing both ends of the header pipe 110. Here, the tube 3 disposed between the upper header tank 100 and the lower header tank 100, and the heat dissipation fin 4 provided between the tube 3 is a tube 3 and a heat dissipation fin (used in a conventional heat exchanger) Since the same configuration as 4), a detailed description thereof will be omitted.

When the refrigerant in the liquid phase (L) is introduced through the inlet pipe 120a in the heat exchanger having such a configuration, the introduced refrigerant is introduced into the second header pipe 110b of the upper header tank 100 and then passes through the tube to the lower header. Refrigerant introduced into the tank 100 ′ and flowing through the lower header tank 100 ′ again flows through the tube 3 into the upper header tank 100 and undergoes heat exchange by the refrigerant. When the heat exchange by the refrigerant is completed, the refrigerant phase-changed from the liquid phase (L) to the gas phase (G) is moved to the first header pipe (110a) of the upper header tank 100 and then to the outside through the outflow pipe (120b) Discharged.

On the other hand, in configuring the heat exchanger, the upper header tank 100 defines a header tank 100 which is located above the heat exchanger and is connected to the inlet / outlet pipe 120 through which the coolant is introduced. Hereinafter, the header pipe 110 and The header tank 100 including the entry and exit pipe 120 inserted into the header pipe 110 will be described in detail.

As shown in FIGS. 3 to 7, in the header pipe 110, the first header pipe 110a and the second header pipe 110b having independent refrigerant passages 150 closely adhere to each other based on the sidewall 112. It is fixed. In particular, the first header pipe 110a and the second header pipe 110b are formed in a hollow tubular shape in which a coolant flow path 150 through which a coolant flows in an inner longitudinal direction is formed. That is, the first header pipe 110a and the second header pipe 110b have a horizontal plane 111 extending horizontally in the longitudinal direction and a sidewall 112 and a sidewall extending in a vertical direction from the sides of the horizontal plane 111. It includes a rounding surface 113 extending to form an inner curved surface at the top of 112.

The header pipe 110 having such a configuration may be manufactured by welding, in particular, when the joint 118 by welding is formed on the header pipe 110, the joint 118 is exposed to the outside as the joint 118 is exposed to the outside. There is a concern that corrosion may occur and durability may also be reduced (see FIG. 5A). Accordingly, in the present invention, since the joint 118 is formed on the close sidewall 112 in which the first header pipe 110a and the second header pipe 110b are in close contact with each other by welding, Corrosion can be prevented and durability improved (see FIG. 5B).

In the case of a conventional header tank, a U-shaped header body and a header plate covering the upper side of the header body and a partition member for isolating the inner space of the header body in the longitudinal direction are assembled and brazed. Coating or fine cracks may be generated, which may result in incomplete bonding and leakage of the refrigerant. In order to solve this problem, in the case of the header tank 100 according to the present invention, the first header pipe 110a and the second header pipe 110b having independent refrigerant passages 150 are disposed between the sidewalls 112. To ensure close contact with each other so that the refrigerant does not leak to the outside.

An inlet and outlet pipe 120 composed of an outlet pipe 120b or an inlet pipe 120a is inserted into the first header pipe 110a and the second header pipe 110b in the transverse direction of the header pipe 110. To this end, an inlet hole 115 through which the inlet pipe 120a is inserted is formed at one side wall of the second header pipe 110b and a through hole through which the inlet pipe 120a penetrates at both side walls of the first header pipe 110a. 114 is formed to face (see FIG. 6), and an insertion hole 116 into which the outlet pipe 120b is inserted is formed at one side wall of the first header pipe 110a (see FIG. 7). Thus, the refrigerant in the liquid phase L flows into the heat exchanger after flowing into the second header pipe 110b through the inflow pipe 120a, and the refrigerant in the gas phase G circulated in the heat exchanger is the first header. It may be discharged to the outside through the outflow pipe 120b connected to the pipe 110a.

In the case of the conventional header tank, the inlet pipe and the outlet pipe are installed to extend in the longitudinal direction of the header tank. At this time, since the entire length of the heat exchanger is extended, there is a disadvantage in that a space limitation occurs in mounting the header tank in the vehicle. In the case of the header tank 100 by the inlet pipe (120a) and the outlet pipe (120b) is installed in the transverse direction of the header tank 100, effective space utilization is possible in mounting the header tank 100 in the vehicle Has the advantage.

In addition, a baffle groove 117 is formed in the upper surfaces of the first header pipe 110a and the second header pipe 110b, and the refrigerant flow path 150 in the header pipe 110 is transversely formed in the baffle groove 117. Baffle 130 isolating is installed. At this time, the baffle 130 is preferably formed in a shape corresponding to the cross section of the header pipe 110 is inserted, through which the baffle 130 is to closely isolate the refrigerant flow path 150 in the header pipe 110 Can be.

In addition, both ends of the first header pipe (110a) and the second header pipe (110b) is provided with a closing partition wall 140 for wrapping and fixing it. The finishing partition wall 140 includes a first finishing partition wall 140a and a second finishing partition wall 140b coupled to surround both ends of the first header pipe 110a and the second header pipe 110b, and at an edge thereof. A plurality of coupling units 141 are formed spaced apart by a predetermined interval. The coupling unit 141 is for increasing the fixing force of the finishing partition wall 140 that is coupled to both ends of the header pipe 110, is bent extending from the edge of the header pipe 110, the outer peripheral surface of both ends of the header pipe 110 It is configured to be in close contact with.

Hereinafter, the entry and exit pipe inserted in the transverse direction of the header pipe will be described in detail.

8 is a view showing a side view of the entry and exit pipe coupled to the header tank according to the present invention.

As shown in FIG. 8, the entry / exit pipe 120 has a circular through portion 121 inserted into the header pipe 110 and a circular expansion having an inner diameter extending from the horizontal through portion 121 and extending. In the configuration including a pipe 122, the inlet and out passage 160 of Figure 3, the refrigerant is supplied and discharged inside the horizontal communication portion 121 and the inner space of the circular expansion portion 122 communicate with each other. At this time, the height of the circular expansion portion 122 is formed smaller than the height of the header pipe 110 is inserted and the entry pipe 120, the height h2 of the entry and exit flow path 160 of the circular expansion portion 122 is a horizontal through portion It is preferable that the entry and exit flow path 160 of 121 be equal to or higher than the height h1. In addition, a bead portion 123 protruding to the outside may be further formed between the horizontal through portion 121 and the circular expansion portion 122, and the bead portion 123 may include the entry and exit pipe 120 and the header pipe 110. When inserted into the refrigerant to prevent leakage through their binding site.

Referring again to FIG. 2 or FIG. 3, the inlet / outlet pipe 120 having such a configuration may include an inlet pipe 120a for introducing a refrigerant in the liquid phase L into the header pipe 110, and a header of a heat exchanged gaseous refrigerant. It may be divided into an outlet pipe 120b for discharging to the outside from the pipe 110. That is, the inflow pipe 120a has a horizontal through portion 121 inserted into the inflow hole 115 of the second header pipe 110b, and the circular expansion portion 122 of the inflow pipe 120a is the outflow pipe 120b. The inner diameter of the circular expansion portion 122 of the) is formed smaller, the outer peripheral shape of the horizontal through portion 121 is formed in a shape corresponding to the inner diameter of the inlet hole (115). In contrast, the outflow pipe 120b has a horizontal through portion 121 inserted into the insertion hole 116 of the first header pipe 110a, and the outer circumferential shape of the horizontal through portion 121 is an insertion hole 116. It is formed in a shape corresponding to the inner diameter. As a result, when the inflow pipe 120a or the outflow pipe 120b is inserted into the header pipe 110, the refrigerant flowing therein may be prevented from leaking to the outside through the corresponding coupling portion.

On the other hand, the manufacturing method of the header tank by this invention is demonstrated.

First, the header pipe 110 and the entry and exit pipe 120 is provided, and the baffle 130 for horizontally insulating the closing partition wall 140 and the header pipe 110 disposed at both ends of the header pipe 110 in a lateral direction. Prepare. For example, the first header pipe 110a and the second header pipe 110b having independent refrigerant flow paths 150 are formed, but one side wall of the second header pipe 110b and both side walls of the first header pipe 110a are formed. The inlet pipe (120a) is formed in the inlet hole 115 and the through hole 114 (see Fig. 6), respectively, the one side wall of the first header pipe (110a) is inserted into the outlet pipe 120b is inserted The ball 116 is formed (see FIG. 7), and the baffle groove 117 into which the baffle 130 is inserted is formed at the upper portion of the header pipe 110. In addition, the insertion hole of the inlet pipe 120a and the first header pipe 110a which penetrates the through hole 114 of the first header pipe 110a and is inserted into the inlet hole 115 of the second header pipe 110b. Each of the outflow pipes 120b inserted into 116 is prepared.

The components of such a configuration are arranged at the coupling scheduled position and mutually assembled, a clad material is applied to a portion to which each component is joined, and the components assembled by applying the clad material are brazed and joined to each other.

Here, although the above-described clad material is coated and brazed is limited to the components for constituting the header tank 100, the present invention is not limited thereto. The header pipe 110, the entrance pipe 120, and the finishing partition wall 140 are described. In addition to the baffle 130, other components may be further added and assembled.

In particular, in the case of manufacturing the heat exchanger, in addition to the components constituting the header tank 100, the components necessary for manufacturing the heat exchanger, such as the heat dissipation fin 4, the tube 3 and the lower header tank 100 ', and the like, Clad material is applied to the parts and brazed so that they can be assembled together.

Hereinafter, a flow process in which the refrigerant flows in the heat exchanger in which the header tank is installed according to the present invention will be described in detail.

9 is a view showing a flow in which the refrigerant flows in the heat exchanger according to the present invention, Figures 10 and 11 is a view showing a flow in which the refrigerant flows in the heat exchanger according to a modification of the present invention.

As shown in FIG. 9, the heat exchanger according to the present invention is provided with a baffle 130 for horizontally isolating the upper header pipe 110 in a middle portion of the upper header tank 100, and the upper header tank. An inlet and outlet pipe 120 composed of an inflow pipe 120a and an outlet pipe 120b is installed at one side of the 100, and the side wall of the other side of the upper header tank 100, that is, the first header pipe 110a and the first pipe, is formed. A plurality of communication paths 170 communicating with the first header pipe 110a and the second header pipe 110b are formed on sidewalls where the two header pipes 110b are in close contact with each other.

For example, when the refrigerant flows into the second header pipe 110b of the upper header tank 100 through the inflow pipe 120a, the refrigerant flowed into one side of the lower header tank 100 'through the tube 3. Inflow. The refrigerant flowing into one side of the lower header tank 100 'moves along the length of the lower header tank 100' to the other side of the lower header tank 100 ', and then again through the tube 3 to the upper side. It moves to the second header pipe 110b of the header tank 100. The refrigerant moved to the second header pipe 110b of the upper header tank 100 moves to the first header pipe 110a through the communication path 170 and then again through the tube 3 to the lower header tank 100 '. Move to the other side of the lower side, and move to one side of the lower header tank 100 'and then move to the first header pipe 110a of the upper header tank 100 through the tube 3 to the first header pipe 110a. It is discharged to the outside through the outflow pipe (120b) connected to. As such, the refrigerant introduced into the inflow pipe 120a flows four passes between the upper header tank 100 and the lower header tank 100 'and then flows out through the outflow pipe 120b.

As shown in FIG. 10, the heat exchanger according to the modification of the present invention is one-third from one end of the upper header tank 100 (for example, one end of the upper header tank 100) in which the inlet and outlet pipes 120 are installed. ) And baffles 130 are provided on the other side of the lower header tank 100 '(for example, 1/3 of the other end of the lower header tank 100'), and the lower header tank 100 ' The plurality of communication paths 170 communicating the first header pipe 110a and the second header pipe 110b to the other side wall, that is, the side wall where the first header pipe 110a and the second header pipe 110b are in close contact with each other. Is formed.

That is, when the refrigerant flows into the second header pipe 110b of the upper header tank 100 through the inflow pipe 120a, the introduced refrigerant flows into one side of the lower header tank 100 'through the tube 3. After that, it is moved to the second header pipe 110b of the upper header tank 100 through the tube 3 again by the baffle 130 installed in the lower header tank 100 '. Subsequently, the refrigerant flowing into the second header pipe 110b of the upper header tank 100 moves back to the lower header tank 100 'through the tube 3, and then a communication path installed in the lower header tank 100'. After transversely through 170, the tube 3 moves to the first header pipe 110a of the upper header tank 100. The refrigerant moved to the first header pipe 110a of the upper header tank 100 is moved to the lower header tank 100 'again through the tube 3, and finally the outflow pipe of the upper header tank 100 ( Through 120b). As such, the refrigerant introduced through the inflow pipe 120a flows through the upper header tank 100 and the lower header tank 100 'for six passes, and then flows out through the outlet pipe 120b.

As shown in FIG. 11, the heat exchanger according to another modification of the present invention includes an inlet and outlet pipe 120 including an inlet pipe 120a and an outlet pipe 120b at an intermediate portion of the upper header tank 100. The baffles 130 are provided at one side and the other side of the upper header tank 100, respectively, and side walls of the upper header tank 100, that is, the first header pipe 110a and the second header pipe 110b are mutually connected. A plurality of communication paths 170 communicating with the first header pipe 110a and the second header pipe 110b are formed on the close sidewalls.

For example, when the refrigerant flows into the second header pipe 110b of the upper header tank 100 through the inflow pipe 120a, the refrigerant introduced is separated in both directions of the second header pipe 110b and then moved to the second header pipe 110b. It moves to the lower header tank 100 'by the pair of baffles 130 provided in the header pipe 110b. At this time, in one side and the other side of the heat exchanger according to the present invention, the flow of the refrigerant as described with reference to FIG. 9 is formed, respectively, and the refrigerant circulating in one side and the other side of the heat exchanger is formed in the upper header tank 100. It finally converges to one header pipe 110a and is discharged to the outside through the outflow pipe 120b. As such, the refrigerant introduced into the inlet pipe 120a is separated in both directions of the upper header tank 100 and then flows between the upper header tank 100 and the lower header tank 100 'in an independent four pass and then the outflow pipe. Outflow through 120b.

While the invention has been shown and described with respect to specific embodiments thereof, it will be appreciated that the invention can be variously modified and varied without departing from the spirit or scope of the invention as provided by the following claims. It will be obvious to those of ordinary skill.

As described above, according to the present invention, since the joint is formed on the side of the first header pipe and the second header pipe closely contact each other, it is possible to prevent corrosion caused by welding generated when the joint is exposed and to improve the durability of the product. There is an advantage that it can.

In addition, the present invention has the advantage that the quality of the product can be improved by preventing the leakage of the refrigerant.

In addition, the present invention has the advantage that it is possible to form a variety of refrigerant flow path, to overcome the limitations of the narrow space in the arrangement of each product configuration in the vehicle to make effective space utilization.

Claims (13)

A plurality of tube insertion holes 119 into which the tube is inserted are formed on the lower surface, and the first header pipe 110a and the second header pipe 110b each having an independent refrigerant passage 150 formed in the inner longitudinal direction are formed. Header pipe 110, A closing partition wall 140 installed at both ends of the header pipe 110, An inlet and outlet pipe 120 comprising an inlet pipe 120a penetrating the first header pipe 110a and inserted into the second header pipe 110b and an outlet pipe 120b inserted into the first header pipe 110a. Header tank comprising a). The method according to claim 1, The first and second header pipes 110a and 110b are A header tank each composed of tubular pipes and fixed to each other through sidewalls. The method according to claim 1, The first and second header pipes 110a and 110b are A header tank configured to fold the cladding plate to form each header pipe and to be coupled to each other by melting the clad upon integral brazing. The method according to claim 3, The first and second header pipes 110a and 110b are in contact with each other by being folded. Header tanks, characterized in that the first and second header pipes (110a), 110b are configured to be in close contact with each other. The method according to any one of claims 1 to 4, The first header pipe 110a Through-holes 114 through which the inlet pipe 120a penetrates are formed in both side walls, and the insertion hole 116 into which the outlet pipe 120b is inserted is formed in one side wall. The second header pipe 110b Header hole corresponding to the through hole 114 is formed in the side wall in close contact with the first header pipe (110a). The method according to any one of claims 1 to 4, The entrance and exit pipe 120 is A horizontal through part 121 formed at an inner side of the entry and exit passageway 160 and inserted into the first header pipe 110a or the second header pipe 110b; The header tank, characterized in that it comprises a circular expansion portion 122 extending in the horizontal through portion 121 and the inner diameter is expanded. The method according to claim 6, The header tank, characterized in that the bead portion (123) is further formed between the horizontal through portion 121 and the circular expansion portion (122). The method according to claim 6, The diameter of the circular expansion portion 122 of the inlet pipe 120a is Header tank characterized in that it is formed smaller than the diameter of the circular expansion pipe 122 of the outflow pipe (120b). An upper header tank 100 having a structure according to any one of claims 1 to 3, Side walls of the first header pipe 110a and the second header pipe 110b, which are disposed to face the upper header tank 100 and in which the refrigerant flow passage 150 is formed in the inner longitudinal direction, are fixed to each other, and both ends thereof have a closing partition wall. A lower header tank 100 'installed to surround the 140, A plurality of tubes 3 arranged in parallel between the upper header tank 100 and the lower header tank 110 '; Heat exchanger, characterized in that coupled to the brazing integrally including a heat radiation fin (4) provided between the tube (3). The method according to claim 9, Heat exchanger, characterized in that a plurality of coupling units (141) are formed at the edge of the closing partition wall 140 is installed on both ends of the first header pipe (110a) and the second header pipe (110b). The method according to claim 9, A baffle 130 is provided at an intermediate portion of the upper header tank 100 to isolate the upper header pipe 110 in a lateral direction, and an inlet and outlet pipe 120 is provided at one side of the upper header tank 100. A plurality of communication paths 170 are formed on the other side wall of the upper header tank 100 so as to communicate the first header pipe 110a and the second header pipe 110b, and the inflow pipe 120a. The refrigerant introduced from the heat exchanger characterized in that the four passes between the upper header tank (100) and the lower header tank (100 ') is discharged through the outlet pipe (120b). The method according to claim 9, One side of the upper header tank 100 in which the inlet and outlet pipes 120 are installed is provided with a baffle 130 for isolating the upper header pipe 110 in the lateral direction. The other side of the lower header tank (100 ') is provided with a baffle (130) for isolating the lower header pipe (110b) in the transverse direction, the first header pipe on the other side wall of the lower header tank (100'). A plurality of communication paths 170 communicating with 110a and the second header pipe 110b are formed, such that the refrigerant flowing from the inflow pipe 120a passes through the upper header tank 100 and the lower header tank 100. Heat exchanger, characterized in that discharged through the outlet pipe (120b) by flowing six passes between. The method according to claim 9, Inlet and outlet pipe 120 is installed in the middle of the upper header tank 100, baffles 130 for isolating the upper header pipe 110 in the lateral direction on one side and the other side of the upper header tank (100). ) Are respectively installed, and a plurality of communication paths 170 communicating with the first header pipe 110a and the second header pipe 110b are formed on both side walls of the upper header tank 100. After the refrigerant introduced from 120a is separated into both upper header tanks 100, the refrigerant flows between the upper header tank 100 and the lower header tank 100 'in four independent paths and is discharged through the outlet pipe 120b. Heat exchanger, characterized in that.

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