KR101075164B1 - Heat exchanger - Google Patents

Abstract

The present invention relates to a heat exchanger, and more particularly, by forming a distribution pipe having a plurality of distribution holes between the divided refrigerant passages in the upper and lower header tanks, thereby improving refrigerant distribution and simplifying the refrigerant flow to improve the refrigerant pressure drop. In addition, the present invention relates to a heat exchanger which improves heat exchange performance and freely installs inlet and outlet pipes.

Accordingly, the present invention includes a plurality of tubes 130 having a flow path therein and arranged in a plurality of rows; A heat dissipation fin 140 interposed between the tubes 130; The header 111 is coupled to one end of the tube 130 and the tank 112 for sealing one side of the header 111, the interior of the distribution path 117 is formed in a predetermined space in the longitudinal direction An upper header tank 110 having bisected refrigerant passages 113 and 114 communicating with each of the tube rows 131 and 132 arranged in a plurality of rows by one partition means 115 and 115a; A header 121 coupled to the other end of the tube 130 and a tank 122 for sealing one side of the header 121, and having a distribution path 127 having a predetermined space in a longitudinal direction therein. And a lower header tank 120 having bisected refrigerant passages 123 and 124 communicating with each of the tube rows 131 and 132 arranged in a plurality of rows by the two partition means 125. do.

Heat exchanger, evaporator, header tank, tube, heat dissipation fin, compartment, distribution pipe, distribution hole

Description

Heat exchanger

1 is a perspective view showing a conventional heat exchanger,

2 is a cross-sectional view taken along the line A-A in FIG.

3 is a perspective view of a heat exchanger according to a first embodiment of the present invention;

4 is a cross-sectional view taken along line B-B in FIG. 3;

5 is a cross-sectional view showing a state in which the tube widths of the front and rear tube rows are configured asymmetrically in the heat exchanger according to the first embodiment of the present invention;

6a to 6d are views showing various examples of modifying the structure of the header tank in the heat exchanger according to the present invention,

7 is a perspective view of a heat exchanger according to a second embodiment of the present invention;

8 is a cross-sectional view taken along the line C-C in FIG.

9 is a cross-sectional view showing a heat exchanger according to a third embodiment of the present invention.

Description of the Related Art [0002]

100: heat exchanger 110: upper header tank

111,111a, 111b, 121,121a: header 112,112a, 122,122a: tank

113, 114, 123, 124: refrigerant passage 115, 115a: first partition means

116: first distribution pipe 116a, 116b, 126a, 126b: distribution hole                 

117,127 Distribution 118,118a, 128 Partition plate

120: lower header tank 125: second partition means

126: second distribution pipe 130: tube

131: front tube row 132: rear tube row

140: heat sink fin 150: end plate

160: end cap 170: inlet pipe

171: outlet pipe

The present invention relates to a heat exchanger, and more particularly, by forming a distribution pipe having a plurality of distribution holes between the divided refrigerant passages in the upper and lower header tanks, thereby improving refrigerant distribution and simplifying the refrigerant flow to improve the refrigerant pressure drop. In addition, the present invention relates to a heat exchanger which improves heat exchange performance and freely installs inlet and outlet pipes.

The heat exchanger has a flow path through which a heat exchange medium flows, and is used to heat exchange the heat exchange medium and the outside air, and is used in various air-conditioning apparatuses. Various types of things, such as an evaporator, a condenser, a radiator, and a heater core, are used. .

Among the heat exchangers, the evaporator is classified according to the structural type of the refrigerant passage, such as a serpentine type in which a single extruded tube is bent in multiple stages, a laminate type in which a dimple plate is laminated, and the like. A multi-extruded tube type evaporator using a tube is introduced.

Briefly describing such a plurality of extruder tube type evaporator, as shown in Figures 1 and 2, a plurality of tubes 30 arranged in a plurality of rows, and the heat radiation fins 40 interposed between the tubes (30) And a plurality of rows of upper and lower header tanks 10 in which a plurality of rows of coolant passages 14, 14a, 23, 23a are formed to communicate with both ends of the plurality of rows of tubes 30 and communicate with each other. It consists of 20.

In addition, the upper header tank 10 is provided with a baffle 15 for dividing the refrigerant passages 14 and 14a in one side of the tube 30 arranged in a plurality of rows on one side of the baffle 15. A plurality of communication holes 13 communicating with each of the refrigerant passages 14 and 14a are formed to allow the heat exchanged refrigerant to flow into the rear tube row 32 while passing through the front tube row 31.

In addition, the upper header tank 10 is provided with inlet and outlet pipes (2) (3) so that the refrigerant can be introduced / discharged.

Here, the upper and lower header tanks 10 and 20 are headers 11 and 21 coupled to the ends of the tube 30 and tanks 12 and 22 joined to the headers 11 and 21. )

Meanwhile, the coolant distribution plates 25 are installed in the coolant passages 23 and 23a of the lower header tank 20 at predetermined intervals so that the coolant flowing through the coolant passages 23 and 23a is provided in the respective tubes 30. It is distributed evenly so that it can flow.

Therefore, the refrigerant flows into the refrigerant passage 14 at the front side of the upper header tank 10 through the inlet pipe 2 and then is one tube of the front tube row 31 partitioned by the baffle 15. Flow along the (31) flows into the front refrigerant passage (23) of the lower header tank (20).

The refrigerant flowing into the front refrigerant passage 23 of the lower header tank 20 is U-turned, and this time flows along the other tubes 31 of the front tube row 31 while the front refrigerant of the upper header tank 10 flows. It flows into the passage 14.

Subsequently, the refrigerant flowing into the front refrigerant passage 14 of the upper header tank 10 flows to the adjacent rear refrigerant passage 14a through the plurality of communication holes 13, and then the baffle 15 It flows along one tube 32 of the rear tube row 32 partitioned by and flows into the rear refrigerant passage 23a of the lower header tank 20.

The refrigerant introduced into the rear refrigerant passage 23a of the lower header tank 20 is U-turned and this time flows along the other tubes 32 of the rear tube row 32 while the rear refrigerant of the upper header tank 10 After entering the passage (14a) is discharged through the outlet pipe (3).

However, the conventional evaporator 1 has a problem that the refrigerant flow is complicated and the pressure drop on the refrigerant side is increased by the refrigerant distribution plate 25 installed to uniformly flow the refrigerant, thereby degrading the heat exchange performance.

In addition, since the installation positions of the inlet and outlet pipes 2 and 3 are limited, it is difficult to install the inlet and outlet pipes 2 and 3 in front of the evaporator 1.

An object of the present invention for solving the above problems is to form a distribution pipe having a plurality of distribution holes between the divided refrigerant passage in the header tank to improve the refrigerant distribution and simplify the refrigerant flow to improve the refrigerant pressure drop amount At the same time, to improve the heat exchange performance and to provide a heat exchanger free installation position of the inlet and outlet pipes.

In order to achieve the above object, the present invention is a front tube array and rear tube array each arranged a plurality of tubes having a flow path in the front and rear, respectively; A heat dissipation fin interposed between the tubes; An upper header tank including a header coupled to one end of each tube of the front and rear tube rows and a tank for sealing an opened side of the header; A lower header tank including a header coupled to the other end of each tube of the front and rear tube rows and a tank for sealing one opened side of the header; A first distribution pipe which is formed in the longitudinal direction inside the upper header tank and is in close contact with an inner surface of the tank to form a distribution path of a predetermined space, and is formed to connect the first distribution pipe and the header to the A partition plate forming a divided refrigerant passage communicating with the front tube row and the rear tube row, respectively, in the upper header tank, and formed on both sides of the first distribution pipe to communicate the distribution path and the divided refrigerant path, respectively. First partition means configured of a distribution hole to make; A second distribution pipe which is formed in the lengthwise direction of the lower header tank and is in close contact with the inner surface of the tank to form a distribution path of a predetermined space, and is formed to connect the second distribution pipe and the header to the A partition plate forming a divided refrigerant passage communicating with the front tube row and the rear tube row, respectively, in the lower header tank, and formed on both sides of the second distribution pipe to communicate the distribution path and the divided refrigerant path, respectively. It characterized in that it comprises a; second partition means consisting of a distribution hole.

In addition, a plurality of tubes having a flow path therein arranged in a plurality of rows; A heat dissipation fin interposed between the tubes; It consists of a header coupled to one end of the tube and a tank for sealing one side of the header, and communicates with each of the tube rows arranged in a plurality of rows by a first partition means having a distribution path of a predetermined space therein An upper header tank having a bisected refrigerant passage; And a lower header tank comprising a header coupled to the other end of the tube and a tank for sealing one side of the header.                     

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

Figure 3 is a perspective view showing a heat exchanger according to a first embodiment of the present invention, Figure 4 is a cross-sectional view taken along line BB in Figure 3, Figure 5 is a front and rear tube row of the heat exchanger according to a first embodiment of the present invention 6 is a cross-sectional view showing a state in which the width of the tube is configured asymmetrically, and FIGS. 6A to 6D are views showing various examples in which the structure of the header tank is modified in the heat exchanger according to the present invention.

The heat exchanger 100 according to the present invention has a plurality of tubes 130 having a predetermined shape therein and arranged in a plurality of rows, and a heat dissipation fin interposed between the tubes 130 and widening a heat transfer area to promote heat exchange. 140 and upper and lower header tanks 110 and 120 coupled to communicate with both ends of the plurality of rows of tubes 130, respectively.

And, in order to protect the tube 130 and the heat dissipation fins 140, the outermost end plate 150 is installed, and both ends of the upper and lower header tanks 110 and 120 are open at both end caps ( 160).

In addition, the tube 130 may be made of an extruded tube, it may be made by bonding two plates to each other.

Thereafter, for convenience, the tubes 130 positioned on the front side of the plurality of rows of tubes 130 will be referred to as the front tube row 131, and the tubes 130 located on the rear side will be referred to as the rear tube row 132.

On the other hand, the tube 130, the heat dissipation fin 140, the header tank 110, 120, the end plate 150 and the like is bonded by brazing in a pre-assembled state is the manufacture of the heat exchanger 100 is completed.

In the heat exchanger 100, the upper header tank 110 includes a header 111 coupled to one end of the plurality of rows of tubes 130, and a tank for sealing one opened side of the header 111 ( 112).

Inside the upper header tank 110 is provided a first partition means 115 having a distribution path 117 of a predetermined space in the longitudinal direction, each of the plurality of rows arranged by the first partition means 115 The refrigerant passages 113 and 114 are bisected to communicate with the tube rows 131 and 132.

In addition, the first partition means 115 forms a first distribution pipe 116 in the longitudinal direction inside the upper header tank 110, the first distribution pipe 116 in the divided refrigerant passage ( The plurality of distribution holes 116a are formed at regular intervals so as to communicate with any one of the 113 and 114.

Here, the distribution hole 116a may be formed in various shapes such as a circular shape or a slot shape on one side of the first distribution pipe 116.

In addition, a partition plate 118 is further formed between the first distribution pipe 116 and the header 111.

Accordingly, the distribution passage 117 of the refrigerant passage 113 and the first distribution pipe 116 communicating with the front tube row 131 among the refrigerant passages 113 and 114 divided into the upper header tank 110. Are communicated with each other through a plurality of distribution holes 116a.                     

The lower header tank 120 includes a header 121 coupled to the other end of the plurality of rows of tubes 130, and a tank 122 sealing one opened side of the header 121.

Inside the lower header tank 120 is provided a second partition means 125 having a distribution path 127 of a predetermined space in the longitudinal direction, each of which is arranged in a plurality of rows by the second partition means 125. The refrigerant passages 123 and 124 are bisected so as to communicate with the tube rows 131 and 132.

In addition, the second partition means 125 forms a second distribution pipe 126 in the longitudinal direction in the lower header tank 120, the second distribution pipe 126 in the divided refrigerant passage ( 123, 124 is formed by forming a plurality of distribution holes (126a, 126b) at regular intervals on both sides to communicate with each other.

Here, the distribution holes 126a and 126b may be formed in various shapes, such as circular or slotted, on both side surfaces of the second distribution pipe 126.

In addition, a partition plate 128 is further formed between the second distribution pipe 126 and the header 121.

Accordingly, the divided refrigerant passages 123 and 124 of the lower header tank 120 and the distribution passages 127 of the second distribution pipe 126 communicate with each other through a plurality of distribution holes 126a and 126b. Will be.

Meanwhile, the plurality of distribution holes 126a and 126b formed on both side surfaces of the second distribution pipe 126 may be formed side by side, or may be formed in a zigzag form.                     

In addition, a communication hole (not shown) may be further formed in the partition plate 128 so as to further communicate the divided refrigerant passages 123 and 124 in the lower header tank 120.

The first and second distribution pipes 116 and 126 formed in the upper and lower header tanks 110 and 120 are extruded together with the tanks 112 and 122 or the headers 111 and 121, respectively. It may be formed integrally, or may be separately formed and then joined by brazing.

In the above, the case where the width of the tubes 130 of the front and rear tube rows 131 and 132 are the same is described, but as described above, the flow direction of the refrigerant is the front tube row 131 and the rear tube row 132. In the U-turn flow form that is sequentially passed through the tube 130, the width (W1) of the front and rear tube rows 131, 132 to improve the overall temperature distribution and improve the outlet temperature of the heat exchanger It is preferable to form (W2) asymmetrically.

That is, the tube 130 width W1 of the upstream tube row 131 upstream with respect to the refrigerant flow direction flowing through the front and rear tube rows 131 and 132 is rear tube row downstream ( It is to form larger than the width (W2) of the tube 130 of 132.

Therefore, it is possible to improve the heat distribution as well as to improve the temperature distribution.

In addition, the upper header tank 110 is provided with an inlet pipe 170 communicating with the distribution path 117 so that the refrigerant can be introduced from the outside, and the refrigerant heat exchanged through the respective tube rows 131 and 132. An outlet pipe 171 is also installed in communication with any one of the divided refrigerant passages 113 and 114 so as to discharge to the outside.

Here, the outlet pipe 171 is preferably installed to communicate with the refrigerant passage 114 in communication with the rear tube row 132 downstream.

Accordingly, the inlet and outlet pipes 170 and 171 may be formed in one side end cap 160 of the upper header tank 110 corresponding to the side surface of the heat exchanger 100 in the same direction, or both end portions. The caps 160 may be formed in opposite directions, respectively.

In addition, the inlet and outlet pipes 170 and 171 are not formed on the side surfaces of the heat exchanger 100, and the front surface of the heat exchanger 100 is in communication with the distribution passage 117 and the refrigerant passage 114, respectively. It can be installed in various locations, such as can be formed on.

In addition, although the distribution holes 126a and 126b formed on both sides of the second distribution pipe 126 installed in the lower header tank 120 may be formed side by side or in a zigzag form, the distribution holes 126a and 126b may be formed. ) So that the refrigerant can be concentrated in an overheated region where the refrigerant is not uniformly distributed, thereby uniformly distributing the refrigerant throughout the entire region.

6A to 6D are views showing various examples in which the structure of the header tank is modified. Referring to the drawings, only the characteristic parts will be briefly described and repeated descriptions will be omitted.

In addition, although only the upper header tank 110 is illustrated in the drawings, the same applies to the lower header tank 120.

First, FIG. 6A illustrates a structure in which the partition plate 118 is deleted in the header tank 110, so that the distribution pipe 116 formed in the header tank 110 simultaneously functions as the partition plate 118. And, the header 111 is coupled to the lower end of the tank 112 in a divided form, respectively, so that the refrigerant passages 113 and 114 bisected by the distribution pipe 116 are formed in the header tank 110. do.

Although FIG. 6B has the same structure as that of FIG. 6A, the header 111 is divided in FIG. 6A, but the header 111a is integrally formed in FIG. 6B.

6C is a structure in which both the distribution pipe 116 and the partition plate 118a are formed in the header tank 110, the distribution pipe 116 is integrally formed on the tank 112 side, and the partition plate 118a. ) Is formed integrally on the header 111a side.

6D has a structure in which the tank 112a and the header 111b are substantially symmetrical, wherein half of the distribution pipe 116 is integrally formed at the tank 112a side and the other half is at the header 111b side. It is formed integrally with. Therefore, when the tank 112a and the header 111b are combined to form a complete distribution tube 116, the refrigerant passage 113 divided into two sides of the distribution tube 116 by the distribution tube 116, respectively. 114 is formed.

In addition, a distribution hole 116a for communicating the distribution passage 117 of the distribution pipe 116 and the refrigerant passages 113 and 114 divided into portions is formed at the contact portion between the tank 112a and the header 111b. .

Meanwhile, although the sizes of the refrigerant passages 113 and 114 and the distribution passage 117 are the same, the size of the distribution passage 117 is reduced by reducing the size of the distribution pipe 116. It may be formed smaller than (114).

Thus, the structure of the header tank 110 shown in Figures 6a to 6d is an example, and can be formed in various ways in addition to this.

Hereinafter, the refrigerant flow of the heat exchanger 100 according to the first embodiment of the present invention will be described.

First, the refrigerant flowing into the inlet pipe 170 flows into the distribution passage 117 of the first distribution pipe 116 of the upper header tank 110. The refrigerant introduced into the distribution passage 117 flows into the refrigerant passage 113 communicating with the front tube row 131 through a plurality of distribution holes 116a formed at one side of the first distribution tube 116. The refrigerant flowing into the refrigerant passage 113 is introduced into the refrigerant passage 123 of the lower header tank 120 after the first heat exchange with the outside air in the process of flowing along the front tube row 131. .

Subsequently, the refrigerant introduced into the refrigerant passage 123 of the lower header tank 120 distributes the second distribution pipe 126 through the plurality of distribution holes 126a formed at one side of the second distribution pipe 126. After flowing into the furnace 127, the plurality of distribution holes 126b formed on the other side of the second distribution pipe 126 flow into the refrigerant passage 124 communicating with the rear tube row 132.

Thereafter, in the process of flowing along the rear tube row 132, after the second heat exchange with the outside air, the refrigerant flows into the refrigerant passage 114 of the upper header tank 110 and finally through the outlet pipe 171. Discharged.

FIG. 7 is a perspective view illustrating a heat exchanger according to a second embodiment of the present invention, and FIG. 8 is a cross-sectional view taken along line CC of FIG. 7, and only a configuration and operation different from those of the first embodiment will be described, and repeated descriptions will be omitted. do.

As described above, in the first embodiment, only one side of the first distribution pipe 116, which is the first dividing means 115 for dividing the refrigerant passages 113 and 114 in the upper header tank 110, is provided. As the distribution hole 116a is formed, the refrigerant flowing into the inlet pipe 170 sequentially passes through the front tube row 131 and the rear tube row 132 and is then discharged through the outlet pipe 171. Whereas with

The first partition means 115a according to the second embodiment includes a plurality of distribution holes 116a at both sides of the first distribution pipe 116 for dividing the refrigerant passages 113 and 114 in the upper header tank 110. By forming the (116b), the refrigerant flowing into the inlet pipe 170 has a refrigerant flow structure that is discharged through the outlet pipe 171 after simultaneously passing through the front and rear tube rows (131, 132). .

That is, the first partition means (115a) is formed in the longitudinal direction inside the upper header tank 110 is formed in close contact with the inner surface of the tank 112 to form a distribution path 117 of a predetermined space A first distribution pipe 116 is formed, and the first distribution pipe 116 has a plurality of distribution holes 116a and 116b at regular intervals on both sides so as to communicate with the divided refrigerant passages 113 and 114, respectively. It is made by forming.

Here, the distribution holes 116a and 116b may be formed in various shapes, such as circular or slotted, on both side surfaces of the first distribution pipe 116.

In addition, the refrigerant passage is divided between the first distribution pipe 116 and the header 111 in communication with the front tube row 131 and the rear tube row 132 inside the upper header tank 110, respectively. Partition plates 118 forming (113, 114) are further formed.

Accordingly, the divided refrigerant passages 113 and 114 of the upper header tank 110 and the distribution passages 117 of the first distribution pipe 116 communicate with each other through a plurality of distribution holes 116a and 116b. Will be.                     

In addition, the lower header tank 120 has a structure that is symmetrical with the upper header tank 110 and the same structure as the lower header tank 120 of the first embodiment will not be described herein.

In addition, in the second embodiment, the inlet pipe 170 is installed to communicate with the distribution passage 117 of the first distribution pipe 116 of the upper header tank 110, the outlet pipe 171 is the lower header tank. It is installed to communicate with the distribution path 127 of the second distribution pipe 126 of 120.

Here, the outlet pipe 171 may be formed in the same direction as the inlet pipe 170, or may be formed in the opposite direction.

In addition, in the second embodiment, the inlet and outlet pipes 170 and 171 are not formed on the side surfaces of the heat exchanger 100, and the heat exchanger 100 is in communication with each of the distribution paths 117 and 127. It can be installed in various positions such as can be formed on the front of the).

Meanwhile, in the above-described first and second embodiments, the plurality of distribution holes 116a and 116b formed in the first distribution pipe 116 of the upper header tank 110 and the second distribution pipe of the lower header tank 120 are described. The plurality of distribution holes 126a and 126b formed at 126 may be formed at the same position, but may be formed to be offset from each other for effective refrigerant distribution.

In addition, distribution holes 116a and 116b and 126a and 126b may be formed at equal intervals or variously arranged in each distribution pipe 116 and 126 for refrigerant distribution.

For example, the distribution holes 116a and 116b can be densely arranged in the direction away from the inlet pipe 170.

Hereinafter, the refrigerant flow of the heat exchanger 100 according to the second embodiment of the present invention will be described.

First, the refrigerant flowing into the inlet pipe 170 flows into the distribution passage 117 of the first distribution pipe 116 of the upper header tank 110. The refrigerant introduced into the distribution path 117 flows simultaneously into the divided refrigerant passages 113 and 114 through the plurality of distribution holes 116a and 116b formed at both sides of the first distribution pipe 116. Thus, the refrigerant flowing into the refrigerant passages 113 and 114 exchanges heat with outside air in the process of simultaneously flowing along the front and rear tube rows 131 and 132, and then nutrients in the lower header tank 120. The refrigerant passages 123 and 124 are respectively introduced.

Subsequently, the refrigerant flowing into the refrigerant passages 123 and 124 of the lower header tank 120 passes through the plurality of distribution holes 126a and 126b formed at both sides of the second distribution pipe 126. After entering the distribution path 127 of the pipe 126, it is finally discharged through the outlet pipe 171.

Therefore, in the second embodiment, the refrigerant flow is further simplified than the first embodiment, and the refrigerant pressure drop amount is further improved.

FIG. 9 is a cross-sectional view showing a heat exchanger according to a third embodiment of the present invention, and only a configuration and an operation different from those of the first embodiment will be described, and repeated descriptions will be omitted.

As shown, the third embodiment further simplifies the structure of the lower header tank 120 of the first embodiment.                     

That is, the lower header tank 120 is composed of a header 121a coupled to the other end of the tube 130 and a tank 122a for sealing one side of the header 121a.

Therefore, the refrigerant flowing along the front tube row 131 flows along the rear tube row 132 after returning from the lower header tank 120.

On the other hand, the third embodiment is the same as all the configuration and operation except for the first embodiment and the lower header tank 120, a detailed description thereof will be omitted.

As described above, the present invention has been described as an example of the evaporator of the heat exchanger 100, in addition to this, it is, of course, applicable to all heat exchangers, such as a radiator, a condenser, a heater core.

According to the present invention, by forming a distribution pipe having a plurality of distribution holes formed between the divided refrigerant passages in the upper and lower header tanks, the refrigerant distribution is improved and the refrigerant flow is simplified to improve the refrigerant pressure drop and at the same time heat exchange. Improved performance and free installation location of inlet and outlet pipe.

Claims (13)

A front tube row 131 and a rear tube row 132 each having a plurality of tubes 130 having a flow path therein arranged in front and rear sides; A heat dissipation fin 140 interposed between the tubes 130; An upper header tank composed of a header 111 coupled to one end of each tube 130 of the front and rear tube rows 131 and 132 and a tank 112 sealing an opened side of the header 111 ( 110); Lower header tank consisting of a header 121 coupled to the other end of each tube 130 of the front and rear tube rows 131 and 132 and a tank 122 sealing the opened side of the header 121 ( 120); The first distribution pipe 116 is formed in the longitudinal direction inside the upper header tank 110 and is in close contact with the inner surface of the tank 112 to form a distribution passage 117 of a predetermined space, and the first A divided refrigerant passage (1) formed to connect the distribution pipe (116) and the header (111) and communicating with the front tube row (131) and the rear tube row (132) in the upper header tank (110), respectively ( Partition plates 118 forming the 113 and 114, and formed on both sides of the first distribution pipe 116 to communicate the distribution passage 117 and the divided refrigerant passages 113 and 114, respectively. First dividing means (115a) composed of distribution holes (116a) and (116b); A second distribution pipe 126 which is formed in the longitudinal direction inside the lower header tank 120 and is in close contact with the inner surface of the tank 122 to form a distribution path 127 of a predetermined space; A divided refrigerant passage formed to connect the second distribution pipe 126 and the header 121 to communicate with the front tube row 131 and the rear tube row 132 in the lower header tank 120, respectively. Partition plates 128 forming 123 and 124 and the second distribution pipe 126 are formed on both sides to communicate the distribution passage 127 and the divided refrigerant passages 123 and 124, respectively. Second dividing means 125 composed of distribution holes 126a and 126b; Heat exchanger comprising a. delete delete delete delete delete delete delete delete The method of claim 1, The partition plate (128) of the second partition means (125) is a heat exchanger, characterized in that further formed communication holes for communicating the refrigerant passages (123) (124) in the lower header tank (120). delete The method of claim 1, The upper and lower header tanks (110, 120) heat exchanger, characterized in that the inlet and outlet pipes (170, 170) in communication with each of the distribution passage (117, 127) is further installed. delete

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