KR101104284B1 - Heat exchanger - Google Patents

Abstract

The present invention relates to a heat exchanger, and more particularly, in the heat exchanger consisting of a two-tank type and a four-tank type, an inner pipe is inserted / installed on the two tank side to transfer the refrigerant on the two tank side to the four tank side or the two tank. By uniformly distributing and supplying the refrigerant flowing into the side, the configuration is simplified and the front and the inlet and outlet pipes are easily arranged, and the unbalanced and uneven areas of the refrigerant are eliminated to uniform the surface temperature distribution of the heat exchanger and improve the heat exchange performance. It relates to one heat exchanger.

Accordingly, the present invention stacks a plurality of tubes 111 having a single flow passage 114 therein, and a first heat exchange part in which upper and lower portions each have a single tank 111a and 111b communicating with the single flow passage 114. 110; A plurality of tanks integrally installed on one side of the first heat exchanger 110 and stacked in a plurality of tubes 121 having independent plurality of flow passages 124 therein and communicating with the plurality of flow passages 124 at upper and lower portions thereof. Second heat exchangers 120 on which 121a and 121b are formed, respectively; Inlet pipe 170 is installed in communication with the single tank (111a, 111b) side of the first heat exchanger 110 and the plurality of tanks (121a, 121b) side of the second heat exchanger 120 is installed in communication Outlet pipe 171; It characterized in that it comprises a refrigerant connection passage 145 for communicating the first heat exchanger 110 and the second heat exchanger 120.

 Heat exchanger, evaporator, tube, first heat exchanger, second heat exchanger, inner pipe

Description

Heat exchanger

1 is a perspective view showing a conventional heat exchanger,

2 is a view showing a refrigerant flow of a conventional heat exchanger,

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

4 is a front view showing a heat exchanger according to the first embodiment of the present invention;

5 is a perspective view illustrating a state in which a two tank type tube is disassembled in a heat exchanger according to a first embodiment of the present invention;

6 is a perspective view illustrating a state in which a four tank type tube is disassembled in a heat exchanger according to a first embodiment of the present invention;

7 is a perspective view illustrating a state in which the blank plate is disassembled in the heat exchanger according to the first embodiment of the present invention;

8 is a view showing a refrigerant flow of the heat exchanger according to the first embodiment of the present invention;

9 is a different configuration of the refrigerant flow in the heat exchanger according to the first embodiment of the present invention,

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

11 to 13 are views illustrating various refrigerant flows of the heat exchanger according to the second embodiment of the present invention.

Description of the Related Art [0002]

100: heat exchanger 110: first heat exchanger

111a: upper single tank 111b: lower single tank

111,121: Tube 112,122: Plate

113,123 Cup 114: Single Euro

115,125: first bead 116,126: neck bead part

116a, 126a: second beads 116b, 126b: passage

120: second heat exchanger 120a: front side heat exchanger

120b: rear side heat exchanger 121a: upper plurality of tanks

121b: Lower revenge tank 124: Revenge euro

127: compartment bead 128: communication path

130,180: blank plate 131: cup

135: communication part

140,140a: inner pipe 141,141a: communication hole

145: refrigerant connection passage

150: heat sink fin 160: end plate

161: return euro

170: inlet pipe 171: outlet pipe

The present invention relates to a heat exchanger, and more particularly, in the heat exchanger consisting of a two-tank type and a four-tank type, an inner pipe is inserted / installed on the two tank side to transfer the refrigerant on the two tank side to the four tank side or the two tank. By uniformly distributing and supplying the refrigerant flowing into the side, the configuration is simplified and the front and the inlet and outlet pipes are easily arranged, and the unbalanced and uneven areas of the refrigerant are eliminated to uniform the surface temperature distribution of the heat exchanger and improve the heat exchange performance. It relates to one heat exchanger.

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-shaped plate is laminated, and the like. The multiple extruder tube type evaporator used is introduced.

In addition, according to the structure of the tank, there are one tank, two tank, four tank type evaporator.

1 is a perspective view showing an example of a four-tank type evaporator, which is disclosed in Japanese Utility Model Laid-Open Publication No. Hei 7-12778. ) Is formed by stacking a plurality of tubes (10) formed by joining two plates (11) formed.

In addition, by stacking a plurality of tubes 10, tanks 2 and 3 are formed at upper and lower sides, and inlet and outlet pipes 4 and 5 are provided at one side to allow the refrigerant to be introduced / exhausted. .

Therefore, the inlet side heat exchanger 20a is configured at the side communicating with the inlet pipe 4, and the outlet side heat exchanger 20b is configured at the side communicating with the outlet pipe 5.

In addition, communication portions 25 are provided on opposite sides of the inlet and outlet pipes 4 and 5 so as to allow the inlet and outlet side heat exchangers 20a and 20b to communicate with each other.

Meanwhile, partition walls 26 are formed in parallel in the upper tank 2 so as to partition the inlet and outlet side heat exchange parts 20a and 20b into a plurality of heat exchange areas 21 to 24. Between the (10) is interposed a heat radiation fin (15) to promote heat exchange.

The refrigerant flow of the evaporator 1 will be described with reference to FIG. 2 as follows.

The refrigerant flowing into the upper tank 2 of the inlet heat exchanger 20a through the inlet pipe 4 is lowered in the first heat exchange area 21 partitioned by the partition wall 26 to lower the tank 3. And the refrigerant moved to the lower tank (3) is returned here and then rises in the second heat exchange zone (22) to move to the upper tank (2).

The refrigerant passing through the inlet side heat exchanger 20a flows into the upper tank 2 of the outlet side heat exchanger 20b through the communication unit 25.

The refrigerant flowing into the upper tank 2 of the outlet side heat exchanger 20b is lowered in the third heat exchange zone 23 partitioned by the partition wall 26 to move to the lower tank 3, and the lower tank ( The refrigerant moved to 3) is returned from the fourth heat exchange zone 24, and then moves to the upper tank 2, and is discharged through the outlet pipe (5).

However, the four tank type evaporator 1 has a uniform temperature distribution compared to the one tank and two tank type evaporators, but it is difficult to arrange the inlet and outlet pipes 4 and 5 forward, and also the one tank and two tank types. There was a problem that the heat dissipation performance is lower than the evaporator.

In order to solve the above problems, an evaporator which combines the advantages of a two-tank type excellent heat dissipation performance and a four-tank type uniform temperature distribution is disclosed in Japanese Patent Laid-Open No. 2003-148833, but the evaporator is complicated in construction. And, the front and rear of the inlet and outlet pipes still had a difficult problem.

An object of the present invention for solving the above problems is to insert / install the inner pipe on the two tank side in the heat exchanger consisting of two tank type and four tank type to transfer the refrigerant of the two tank side to the four tank side or By uniformly distributing and supplying the refrigerant flowing into the two tanks, the configuration is simplified, the front and rear of the inlet and outlet pipes are easily arranged, and the uneven and uneven areas of the refrigerant are eliminated to make the surface temperature distribution of the heat exchanger uniform and heat exchange performance. It is to provide an improved heat exchanger.

In order to achieve the above object, the present invention stacks a plurality of tubes having a single channel therein, the upper and lower portions of the first heat exchanger each formed with a single tank communicating with the single channel; A second heat exchanger which is integrally installed on one side of the first heat exchanger and is formed by stacking a plurality of tubes having a plurality of independent channels therein, and having a plurality of tanks communicating with the plurality of channels in upper and lower portions, respectively; An inlet pipe installed in communication with the single tank side of the first heat exchanger and an outlet pipe installed in communication with the plurality of tanks of the second heat exchanger; And a refrigerant connection passage communicating the first heat exchange part and the second heat exchange part.

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

3 is a perspective view showing a heat exchanger according to a first embodiment of the present invention, Figure 4 is a front view showing a heat exchanger according to a first embodiment of the present invention, Figure 5 is a heat exchanger according to a first embodiment of the present invention 2 is a perspective view illustrating a state in which the two tank type tube is disassembled, FIG. 6 is a perspective view illustrating a state in which the four tank type tube is disassembled in the heat exchanger according to the first embodiment of the present invention, and FIG. 8 is a perspective view illustrating a state in which a blank plate is disassembled in a heat exchanger according to a first embodiment, FIG. 8 is a view showing a refrigerant flow in a heat exchanger according to a first embodiment of the present invention, and FIG. In the heat exchanger according to the embodiment, the refrigerant flow is configured differently.

As shown, the heat exchanger 100 according to the first embodiment of the present invention, a two-tank type and four-tank type of the structure integrally formed, respectively, the two tank type tube 111 and the four tank type tube The 121 is formed by lamination.

Hereinafter, in the present invention, the two tanks are referred to as the first heat exchange part 110 and the four tanks are referred to as the second heat exchange part 120 for convenience.

First, the tube 111 stacked on the first heat exchanger 110 is formed by bonding a pair of plates 112 to each other, and a single channel 114 is formed therein, and the single channel (upper and lower) ( The cup 113 communicating with the 114 is formed to protrude outward of each plate 112.

Therefore, when the plurality of tubes 111 are stacked, the cups 113 of the respective tubes 111 are bonded to each other to form upper and lower single tanks 111a and 111b.

Meanwhile, a neck bead part 116 having a plurality of passages 116b partitioned into at least one second bead 116a is formed at the inlet and outlet side of the single channel 114 of the tube 111 so that the refrigerant is It is made to flow evenly distributed into a single channel (114).

In addition, a plurality of first beads 115 are formed in the pair of plates 112 constituting the tube 111 to protrude inwardly by the embossing molding method along the single channel 114. The grid is arranged regularly in diagonal direction to improve fluidity and induce turbulence. In addition, the first beads 115 formed on the pair of plates 112 are bonded by brazing in contact with each other.

In addition, a second heat exchange part 120 is integrally installed on one side of the first heat exchange part 110, and the tube 121 stacked on the second heat exchange part 120 includes a pair of plates 122. A plurality of flow passages 124 are formed to be bonded to each other, and a plurality of flow passages 124 are formed on both sides thereof with partition beads 127 vertically formed at a center thereof, and communicate with the plurality of flow passages 124 at upper and lower ends, respectively. The pair of cups 123 are formed to protrude side by side in the outward direction of each plate 122.

Therefore, when the plurality of tubes 121 are stacked, a pair of cups 123 of each tube 121 are bonded to each other to form upper and lower plurality of tanks 121a and 121b.

In addition, the tube 121 stacked on the second heat exchange part 120 may also enter each flow path 124 of the plurality of flow paths 124, like the tube 111 stacked on the first heat exchange part 110. The neck bead portion 126 having a plurality of passages 126b partitioned by the second beads 126a is formed at the outlet side, and the pair of plates 122 have a plurality of agents along the plurality of passages 124. One bead 125 is formed to protrude inward by the embossing molding method.

In addition, the second heat exchange part 120 is divided into a front heat exchange part 120a and a rear heat exchange part 120b from an air inflow direction by the plurality of flow paths 124. When the refrigerant transferred from the back flows into the rear heat exchanger 120b, the refrigerant flows back and forth from the rear heat exchanger 120b to move to the front heat exchanger 120a. A communication path 128 is formed to communicate the rear side heat exchange parts 120a and 120b.

That is, the communication path 128 is formed by communicating with a pair of cups 123 formed on the plate 122 of the tube 121.

In addition, the communication path 128 may be formed on the upper plurality of tanks 121a side of the second heat exchange part 120 or may be formed on the lower plurality of tanks 121b side according to the configuration of the flow path of the refrigerant. .

The heat exchanger 100 may configure different areas of the first heat exchanger 110 and the second heat exchanger 120 in consideration of heat exchange performance or an overheated region.

Meanwhile, the heat dissipation fins 150 are interposed between the stacked tubes 111 and 121 to promote heat exchange, and the plurality of tubes 111 and 121 and the heat dissipation fins 150 may be reinforced. At the outermost end of the end plate 160 is installed.

In addition, an inlet pipe 170 is installed in the single tank 111a of the first heat exchange part 110 to discharge the refrigerant, and the refrigerant is discharged to the plurality of tanks 121a of the second heat exchange part 120. The outlet pipe 171 is installed to be able to.

A refrigerant connection passage 145 is provided to allow the first heat exchanger 110 and the second heat exchanger 120 to communicate with each other.

The refrigerant connection passage 145 is inserted into the upper single tank 111a of the first heat exchanger 110 to replace the refrigerant that has completed heat exchange in the first heat exchanger 110 of the second heat exchanger 120. It consists of an inner pipe 140 for transferring to one tank 121a of the upper plurality of tanks 121a.

In the present invention, the inner pipe 140 connects the rear side heat exchanger 120b of the first heat exchanger 110 and the second heat exchanger 120 so that the refrigerant of the first heat exchanger 110 is heat exchanged to the second heat exchanger. Although a refrigerant flow path configured to be transferred to the rear side heat exchanger 120b of the unit 120 is configured, when the position of the inner pipe 140 is changed, more various refrigerant flow paths may be configured.

3 and 8, when the inlet pipe 170 is installed at the upper single tank 111a side in which the inner pipe 140 is installed, an end installed at an outer side surface of the first heat exchange part 110. The plate 160 is formed with a return flow passage 161 connecting the lower single tank 111b on the opposite side of the inner pipe 140 and the inner pipe 140 to communicate with each other.

Here, the end plate 160 joins two plates to form a return flow path 161 therebetween.

Therefore, the refrigerant flowing into the upper single tank 111a of the first heat exchange part 110 through the inlet pipe 170 descends along the single channel 114 and then moves to the lower single tank 111b. After returning along the return flow path 161 of the end plate 160, the inner pipe 140 is transferred to the second heat exchange part 120.

In addition, when the inlet pipe 170 is installed on the lower single tank 111b side opposite to the inner pipe 140 as shown in FIG. 9, the inner pipe 140 of the first heat exchange part 110 is formed. A plurality of communication holes 141 are formed so that the refrigerant flows into the inner pipe 140, and the outer end of the inner pipe 140 is closed.

Therefore, the refrigerant flowing into the lower single tank 111b of the first heat exchange part 110 through the inlet pipe 170 rises along the single channel 114 and then communicates with the inner pipe 140. Through the inner pipe 140 is to be transferred to the second heat exchange unit 120 through.

In addition, by controlling the size, number and spacing of the communication hole 141, the refrigerant can be uniformly distributed in the front and rear direction of the air flow direction. This eliminates the unevenness of the refrigerant when the coolant flows from the first heat exchanger 110 to the second heat exchanger 120, thereby eliminating the overheated region that appears as a non-uniformity.

On the other hand, between the first heat exchanger 110 and the second heat exchanger 120, except that the inner pipe 140 is installed so as to block the flow of the refrigerant between the two heat exchangers (110, 120). The blank plate 130 which closed the remaining tank 111a, 111b, 121a, 121b is provided.

That is, the blank plate 130 excludes a portion in which the inner pipe 140 is installed on at least one of the last plates located at the boundary between the first heat exchange part 110 and the second heat exchange part 120. And the remaining cup 131 is formed by closing.

Hereinafter, the refrigerant flow of the heat exchanger 100 according to the first embodiment of the present invention will be described with reference to FIG. 8.

As described above, the flow of the refrigerant in the first heat exchange part 110 varies according to the installation position of the inlet pipe 170. Therefore, the case where the inlet pipe 170 is installed on the upper single tank 111a side will be described.

First, the refrigerant flowing into the upper single tank 111a of the first heat exchange part 110 through the inlet pipe 170 descends along the single channel 114 and then moves to the lower single tank 111b. After returning along the return passage 161 of the end plate 160, the tank of the rear heat exchanger 120b of the upper plurality of tanks 121a of the second heat exchanger 120 through the inner pipe 140 ( 121a).

Subsequently, the refrigerant transferred to the tank 121a of the rear side heat exchange part 120b is lowered along the flow path 124 of the rear side heat exchange part 120b to move to the lower plurality of tanks 121b, and a plurality of lower parts are provided. The refrigerant moved to the tank 121b is U-turned here through the communication path 128 to move along the flow path 124 of the front side heat exchanger 120a to move to the upper plurality of tanks 121a, and then the outlet pipe. 171 is discharged through.

Thus, the heat exchanger 100 of the present invention is a mixture of two tank type and four tank type to improve the heat dissipation performance by the two tank structure, and to improve the surface temperature distribution of the heat exchanger 100 by the four tank structure. It can be made uniform.

In addition, since the configuration is simple and the front and rear of the inlet and outlet pipes 170 and 171 can be easily disposed, there is an advantage in that the refrigerant piping design can be freely designed when the heat exchanger 100 is mounted on an air conditioner case (not shown). In addition, by using the inner pipe 140, the superheated region can be eliminated by eliminating the uneven and uneven regions of the refrigerant.

10 is a perspective view illustrating a heat exchanger according to a second embodiment of the present invention, and FIGS. 11 to 13 are views illustrating various refrigerant flows of the heat exchanger according to the second embodiment of the present invention. Only parts that are different from the description will be omitted.

As shown, the second embodiment is configured differently from the first embodiment and the refrigerant connection passage 145, the refrigerant connection passage 145 is the first heat exchange unit 110 and the second heat exchange unit ( The communication unit 135 is formed between the 120.

In addition, although the inner pipe 140 in the first embodiment is used to transfer the refrigerant of the first heat exchange part 110 to the second heat exchange part 120, the inner pipe 140a in the second embodiment. ) Is used to uniformly distribute the refrigerant introduced through the inlet pipe 170 to the first heat exchange unit (110).

In the second embodiment, since the first heat exchange part 110 and the second heat exchange part 120 have the same structure as that of the first embodiment, detailed description thereof will be omitted herein, and the inner pipe 140a will be omitted. And other parts including the communication unit 135 will be described.

First, the communicating unit 135 is located on the opposite side of the inner pipe 140a so that the refrigerant of the first heat exchanger 110 can be transferred to the rear heat exchanger 120b of the second heat exchanger 120. It is formed by communicating between the lower single tank 111b and the lower plurality of tanks 121b. Accordingly, the refrigerant having completed heat exchange in the first heat exchange part 110 flows into the rear heat exchange part 120b of the second heat exchange part 120.

Here, the communicating part 135 is installed between the first heat exchange part 110 and the second heat exchange part 120 while the blank plate 130 to block the flow of the refrigerant between the two heat exchange parts (110, 120). In other words, all the cups 131 of the blank plate 130 is closed, but the tank 121b of the rear heat exchanger 120b and the lower single tank 111b of the lower plurality of tanks 121b. The cup 131 portion connecting the c) is opened to form the communication part 135.

In addition, the inner pipe 140a is inserted into the upper single tank 111a of the first heat exchange part 110 and is connected to one side of the inner pipe 140 so as to communicate with the inlet pipe 170. A plurality of communication holes 141a are formed to allow the refrigerant introduced from 170 to be supplied to the first heat exchange part 110.

Here, the size, number and spacing of the communication hole (141a) is preferably adjusted appropriately to uniformly distribute the refrigerant.

On the other hand, the communication portion 135 is formed to be biased to the rear side in order to communicate the rear heat exchange part 120b of the first heat exchange part 110 and the second heat exchange part 120, the inner The refrigerant supplied to the first heat exchange part 110 through the communication hole 141a formed in the pipe 140a should be more supplied to the front side to prevent the non-uniformity of the refrigerant and thereby reduce the overheating area.

Therefore, it is preferable to increase the number or size of the communication holes 141a formed at the front and rear sides of the inner pipe 140a to the front side rather than the rear side.

In addition, the inlet pipe 170 installed in communication with the inner pipe 140a may be installed on the outer surface of the first heat exchanger 110 as shown in FIGS. 10 to 12, and the first pipe as illustrated in FIG. 13. It may be installed in the approximately center area of the heat exchange unit (110).

The second heat exchange part 120 includes a blank plate for closing a specific portion of the upper and lower plurality of tanks 121a and 121b to further reduce the overheating area by increasing up and down flows of the flowing refrigerant. 180) is installed. That is, the blank plate 180 is formed by closing one cup of the upper and lower pair of cups (not shown), and in the drawing, the tank of the rear heat exchanger 120b of the lower plurality of tanks 121b. By closing 121b, the refrigerant introduced from the first heat exchanger 110 to the rear heat exchanger 120b of the second heat exchanger 120 is turned at least once by the blank plate 180 and then lowered. It is transferred to the front side heat exchange part 120a through the communication path 128 formed in the plurality of tanks 121b.

In this case, the communication path 128 is formed by communicating a pair of cups 123 formed on the plate 122 of the tube 121 with each other.

Here, the communication path 128 for communicating the rear heat exchanger 120b and the front heat exchanger 120a may be formed at the upper plurality of tanks 121a depending on whether the blank plate 180 is installed. It may be formed on the lower plurality of tanks (121b) side.

As described above, the second embodiment of the present invention may form various refrigerant passages, as shown in FIGS. 11 to 13, in addition to the inner pipe 140a and the inlet and outlet pipes 170 and 171. In addition, various refrigerant paths may be formed by changing the blank plate 180.

Meanwhile, although the detailed drawings of the blank plates 130 and 180 are not shown in the second embodiment, since the shape is similar to that of the blank plate 130 of the first embodiment, reference may be made to FIG. 7.

Hereinafter, the refrigerant flow of the heat exchanger 100 according to the second embodiment of the present invention will be described with reference to FIG. 11.

As described above, the second embodiment may form various refrigerant passages as shown in FIGS. 11 to 13, and the case of FIG. 11 will be described.

First, the refrigerant introduced into the inner pipe 140a through the inlet pipe 170 is supplied to the upper single tank 111a of the first heat exchange part 110 through the communication hole 141a of the inner pipe 140a. And the refrigerant supplied to the upper single tank 111a is lowered along the single channel 114 and then moved to the lower single tank 111b, and then the second heat exchange part 120 through the communication unit 135. It is conveyed to the tank 121b of the rear side heat exchange part 120b among the lower multiple tank 121b of the.

Subsequently, the refrigerant transferred to the tank 121b of the rear side heat exchange part 120b is moved up along the flow path 124 of the rear side heat exchange part 120b to move to the upper plurality of tanks 121a. The refrigerant moved to the tank 121a is U-turned through the communication path 128, and this time, the refrigerant moves down to the lower plurality of tanks 121b while descending along the flow path 124 of the front side heat exchanger 120a. It is discharged through the outlet pipe 171.

According to the present invention, in the heat exchanger consisting of two tank type and four tank type, the inner pipe is inserted / installed on the two tank side to transfer the refrigerant of the two tank side to the four tank side or the refrigerant flowing into the two tank side. By uniformly distributing and supplying, the configuration is simplified, the front and rear pipes of the inlet and outlet pipes are easily disposed, and the uneven and uneven areas of the refrigerant are eliminated, so that the surface temperature distribution of the heat exchanger is uniform, and the heat exchange performance is also improved.

Claims (8)

A first heat exchange part 110 having a plurality of tubes 111 having a single flow passage 114 stacked therein and having upper and lower portions having single tanks 111a and 111b communicating with the single flow passage 114; A plurality of tanks integrally installed on one side of the first heat exchanger 110 and stacked in a plurality of tubes 121 having independent plurality of flow passages 124 therein and communicating with the plurality of flow passages 124 at upper and lower portions thereof. Second heat exchangers 120 on which 121a and 121b are formed, respectively; Inlet pipe 170 is installed in communication with the single tank (111a, 111b) side of the first heat exchanger 110 and the plurality of tanks (121a, 121b) side of the second heat exchanger 120 is installed in communication Outlet pipe 171; It comprises a refrigerant connection passage 145 for communicating the first heat exchanger 110 and the second heat exchanger 120, The refrigerant connecting passage 145 is inserted into the single tank 111a of the first heat exchanger 110 to supply the refrigerant of the first heat exchanger 110 to the plurality of tanks 121a of the second heat exchanger 120. Heat exchanger, characterized in that the inner pipe (140) for transferring to one of the tank (121a). delete The method of claim 1, On the outer surface of the first heat exchanger 110, an end plate 160 having a return passage 161 for connecting the single tank 111b and the inner pipe 140 on the opposite side of the inner pipe 140 is installed. Heat exchanger, characterized in that. The method of claim 1, The inner pipe 140, the heat exchanger, characterized in that the communication hole 141 is formed so that the refrigerant of the first heat exchanger 110 is introduced into the inside. The method of claim 1, The second heat exchange part 120 is provided with a blank plate 180 for closing a specific portion of the plurality of tanks (121a, 121b) is installed so as to increase the flow of the upper and lower flow of the refrigerant flows. group. A first heat exchange part 110 having a plurality of tubes 111 having a single flow passage 114 stacked therein and having upper and lower portions having single tanks 111a and 111b communicating with the single flow passage 114; A plurality of tanks integrally installed on one side of the first heat exchanger 110 and stacked in a plurality of tubes 121 having independent plurality of flow passages 124 therein and communicating with the plurality of flow passages 124 at upper and lower portions thereof. Second heat exchangers 120 on which 121a and 121b are formed, respectively; Inlet pipe 170 is installed in communication with the single tank (111a, 111b) side of the first heat exchanger 110 and the plurality of tanks (121a, 121b) side of the second heat exchanger 120 is installed in communication Outlet pipe 171; It comprises a refrigerant connection passage 145 for communicating the first heat exchanger 110 and the second heat exchanger 120, The refrigerant connecting passage 145 communicates with one single tank 111b and one plurality of tanks 121b communicating between the first heat exchange part 110 and the second heat exchange part 120. Heat exchanger characterized in that formed by). The method of claim 6, The inlet pipe 170 is connected to the inside of the single tank 111a on the opposite side of the communication unit 135, and the refrigerant introduced from the inlet pipe 170 is supplied to the first heat exchange unit 110. Heat exchanger, characterized in that the inner pipe 140a is formed so that the communication hole (141a) is formed. The method of claim 1, All tanks 111a, 111b, 121a, 121b are disposed between the first heat exchanger 110 and the second heat exchanger 120 to block the flow of refrigerant between the two heat exchangers 110 and 120. Heat exchanger, characterized in that the blank plate 130 is installed to close but only the tank of a specific portion.

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