KR102342091B1 - Heat exchanger - Google Patents

Abstract

The heat exchanger according to the spirit of the present invention may include a connection pipe connecting the first header and the second header in addition to the inlet pipe and the outlet pipe. Therefore, the circulation of the refrigerant can be improved, and the first header and the second header can include a plurality of chambers partitioned inside the header, so that distribution of the refrigerant can be implemented several times according to the flow of the refrigerant passing through each chamber. Distribution and mixing of refrigerant can be improved.

Description

heat exchanger {HEAT EXCHANGER}

The present invention relates to a heat exchanger, and more particularly, to a heat exchanger having an improved refrigerant circulation and distribution structure.

In general, a heat exchanger includes a tube in which a refrigerant flows and heat-exchanges with external air, a heat exchange fin contacting the tube to increase a heat dissipation area, and a header through which both ends of the tube are in communication, and heat exchanges the refrigerant with external air. It is a device that makes The heat exchanger includes an evaporator or a condenser, and may constitute a refrigeration cycle device together with a compressor for compressing the refrigerant and an expansion valve for expanding the refrigerant.

The heat exchanger may have an inlet pipe through which an external refrigerant is introduced, and the refrigerant introduced through the inlet pipe may be distributed to a plurality of tubes through a header. In order to increase heat exchange efficiency, a plurality of tubes are sometimes provided in two rows. During cooling, the flow of refrigerant is in a state of mixing upward (opposite gravity) and downward (gravity direction) flows, The flow consists of a mixture of upward and downward flows.

However, in the case of an upward flow during heating, a condensate is generated inside the tube, and the increase in viscosity and density by this acts as a resistance to the upward flow of the refrigerant, disturbing the refrigerant distribution in the distribution unit and lowering the performance. A structure capable of improving heat exchange efficiency during heating and improving circulation and distribution of the refrigerant by forming the refrigerant in the tube to flow only downward during heating is required.

One aspect of the present invention discloses a heat exchanger in which circulation of a refrigerant is improved so that the refrigerant flows in only one direction, upward or downward, within the heat exchanger.

In particular, one aspect of the present invention discloses a heat exchanger in which circulation of the refrigerant is improved so that, when the refrigerant is condensed, the refrigerant in the heat exchanger flows only in the direction of gravity, and when the refrigerant is under the evaporation condition, the refrigerant flows only in the opposite direction of gravity.

One aspect of the present invention discloses a heat exchanger having an improved refrigerant distribution structure in a header.

According to the spirit of the present invention, the heat exchanger includes tubes in which a refrigerant flows and heat exchanges with external air, and is arranged in a plurality of rows of a first row and a second row, and a first header connected to one end of the tubes; a second header connected to the other ends of the tubes; an inlet pipe through which refrigerant flows into the first header from the outside; an outlet pipe through which refrigerant flows out from the second header; and a connection pipe provided to flow in a detour from the second header to the first header.

Here, the first header includes a first chamber through which the tubes of the first row and the refrigerant flow, a second chamber through which the tubes of the second row and the refrigerant flow, and the refrigerant distribution to the first chamber. It may include a third chamber and a fourth chamber for distributing the refrigerant to the second chamber.

In addition, the first chamber includes a first sub-chamber into which the refrigerant flows from the inlet pipe, and a second sub-chamber through which the refrigerant flows from the third chamber to flow the refrigerant to the tubes in the first row, The second chamber may include a first sub-chamber into which the refrigerant flows from the connection pipe and a second sub-chamber through which the refrigerant flows from the fourth chamber to the tubes in the second row.

In addition, the third chamber includes a through hole provided to introduce a refrigerant from the first sub-chamber of the first chamber, and a longitudinal direction of the third chamber to distribute the refrigerant to the second sub-chamber of the first chamber. a plurality of distribution holes arranged to be spaced apart from each other by a predetermined distance; It may include a plurality of distribution holes arranged to be spaced apart from each other by a predetermined interval in the longitudinal direction of the fourth chamber to distribute the refrigerant.

Here, the distribution hole of the third chamber and the fourth chamber may be formed to have a length along a length direction of the first header longer than a length along a width direction of the first header.

In addition, each of the third chamber and the fourth chamber may have three distribution holes.

Meanwhile, in the distribution hole of the third chamber, a length along a longitudinal direction of the third chamber is longer than a length along a width direction of the third chamber, and the distribution hole of the fourth chamber is a portion of the distribution hole on the through-hole side. The diameter may be formed smaller than the diameter of the distribution hole on the other side.

In addition, the third chamber and the fourth chamber may each have two distribution holes, and the diameter of the distribution hole on the side of the through hole of the fourth chamber may be 5 mm or less.

The first header may include cover baffles coupled to both ends of the first header to seal both open ends of the first chamber and the second chamber.

In addition, the first header may include caps coupled to both ends of the first header to seal open both ends of the third chamber and the fourth chamber.

In addition, the first header includes a partition baffle partitioning the first subchamber and the second subchamber of the first chamber, and a partition baffle partitioning the first subchamber and the second subchamber of the second chamber. may include

The first header includes a first chamber in which the inlet pipe communicates with the tubes in the first row, a second chamber in which the connection pipe communicates with the tubes in the second row, and a third chamber in communication with the first chamber; , a fourth chamber communicating with the second chamber, wherein the second header includes a fifth chamber in which the connection pipe and the tubes in the first row communicate with each other, and a fifth chamber in which the outlet pipe and the tubes in the second row communicate with each other. It may include a sixth chamber, a seventh chamber communicating with the fifth chamber, and an eighth chamber communicating with the sixth chamber.

In addition, the first chamber includes a first subchamber in which the inlet pipe communicates, and a second subchamber in which the tubes in the first row communicate, and the second chamber includes a first subchamber in which the connection pipe communicates. and a second subchamber in which the tubes in the second row communicate, and the fifth chamber includes a first subchamber in which the connecting pipe communicates and a second subchamber in which the tubes in the first row communicate , the sixth chamber may include a first sub-chamber in which the outlet pipe communicates, and a second sub-chamber in which the tubes in the second row communicate.

In addition, the third chamber is disposed such that a through hole through which the first subchamber of the first chamber communicates is spaced apart from each other by a predetermined distance in the longitudinal direction of the first header, and the second subchamber of the first chamber communicates with each other. a plurality of distribution holes, wherein the fourth chamber is disposed to be spaced apart from a through hole through which the first subchamber of the second chamber communicates by a predetermined distance in the longitudinal direction of the first header, and a plurality of distribution holes through which the second subchambers communicate; a plurality of distribution holes through which the second subchamber of the fifth chamber communicates, and the eighth chamber includes a through hole through which the first subchamber of the sixth chamber communicates, and a predetermined length direction of the second header. It may include a plurality of distribution holes disposed to be spaced apart from each other and through which the second subchamber of the sixth chamber communicates.

Here, in the distribution holes of the third chamber and the fourth chamber, a length along a length direction of the first header is longer than a length along a width direction of the first header, and the distribution hole of the seventh chamber is formed with the first header. A length along the longitudinal direction of the seventh chamber may be longer than a length along the width direction of the seventh chamber, and the distribution hole of the eighth chamber may be formed such that the diameter of the distribution hole on the side of the through hole is smaller than the diameter of the distribution hole on the other side. have.

The first header includes a body and a cover, and the cover is coupled to the body and includes a first chamber through which tubes of a first row and a refrigerant flow, and a second chamber through which tubes of a second row and a refrigerant flow. Forming two chambers, the body may include a third chamber for distributing the refrigerant to the first chamber, and a fourth chamber for distributing the refrigerant to the second chamber.

Here, the body may include a central partition wall dividing the first chamber and the second chamber, and the cover may include a coupling hole through which a part of the central partition wall passes.

In addition, the body of the first header may include a wall forming an inner space, and a tube stopper protruding from the wall toward the tubes to limit the insertion depth of the tubes.

The body of the first header may be formed of an aluminum extruded material, and the cover of the first header may be formed of an aluminum clad material, and the cover may be coupled to the body by brazing.

The cover may include a first cover forming the first chamber and a second cover forming the second chamber.

According to the spirit of the present invention from another aspect, the heat exchanger has a refrigerant flowing therein and exchanges heat with external air, and tubes arranged in a plurality of rows of a first row and a second row, and connected to one end of the tubes, and the refrigerant A first header including a plurality of chambers partitioned to distribute and an inlet pipe through which the refrigerant flows, and an outlet pipe through which the refrigerant flows out from the second header.

Here, the first header and the second header may each include four partitioned chambers.

In addition, the first header and the second header are connected by a connection pipe provided so that the refrigerant can bypass and flow without passing through the tubes, and the first header is connected to the inlet pipe and the tubes in the first row and the refrigerant. a first chamber through which , a second chamber through which the connection pipe and the tubes of the second row and a refrigerant flow, a third chamber through which the first chamber and the refrigerant flow; a second chamber and a fourth chamber through which a refrigerant flows, wherein the second header includes a fifth chamber through which the connection pipe and the tubes of the first row and a refrigerant flow; and the outlet pipe and the second It may include a sixth chamber through which the heat tubes and the refrigerant flow, a seventh chamber through which the third chamber and the refrigerant flow, and an eighth chamber through which the fourth chamber and the refrigerant flow.

According to another aspect of the present invention, the heat exchanger is a tube arranged in a plurality of rows of a first row and a second row. A first header including tubes exchanging heat with, and a plurality of chambers connected to one end of the tubes and partitioned to distribute a coolant, and a plurality of partitioned to distribute the coolant, connected to the other ends of the tubes A second header including four chambers, an inlet pipe through which a refrigerant flows into the first header from the outside, and an outlet pipe through which a refrigerant flows out from the second header.

According to the spirit of the present invention, the heat exchanger has an inlet pipe, an outlet pipe, and a connection pipe connecting the first header and the second header, and the refrigerant introduced into the first header during operation of the heating cycle exchanges heat while flowing in the gravity direction from the tubes. After this, it may flow back into the first header through the connection pipe and heat exchange while flowing in the gravity direction from the tubes again.

Since the refrigerant has a structure in which the refrigerant flows only in the gravitational direction in the tubes during operation of the heating cycle, it is possible to reduce the flow resistance of the refrigerant and increase the heat exchange efficiency.

In addition, the first header and the second header are each composed of a body and a cover, and may include a plurality of chambers partitioned inside the header, and the distribution of the refrigerant may be implemented several times according to the flow of the refrigerant passing through each chamber. , the distribution of refrigerant can be improved.

In addition, the body of the first header and the second header is formed of an extruded material, the cover is formed of a clad material, and the cover and the body are coupled by brazing to facilitate assembly of the header and secure bonding force.

1 is a perspective view illustrating an exterior of a heat exchanger according to an embodiment of the present invention;
FIG. 2 is a perspective view illustrating an external appearance of a first header of the heat exchanger of FIG. 1 ;
3 is an exploded perspective view illustrating the configuration of a first header of the heat exchanger of FIG. 1 ;
Fig. 4 is a side cross-sectional view of a first header of the heat exchanger of Fig. 1;
FIG. 5 is a plan view illustrating an external appearance of a body of a first header of the heat exchanger of FIG. 1 ;
Fig. 6 is a front sectional view of a first header of the heat exchanger of Fig. 1;
FIG. 7 is a side cross-sectional view of a first header for showing a coupling structure of an inlet pipe and a connecting pipe of the heat exchanger of FIG. 1;
Fig. 8 is a plan view of the first header showing the vicinity of the inlet pipe and the connecting pipe of the heat exchanger of Fig. 1;
9 is a perspective view illustrating an external appearance of a second header of the heat exchanger of FIG. 1 ;
10 is an exploded perspective view showing the configuration of a second header of the heat exchanger of FIG. 1;
Fig. 11 is a cross-sectional side view of a second header of the heat exchanger of Fig. 1;
FIG. 12 is a plan view illustrating an external appearance of a body of a second header of the heat exchanger of FIG. 1 ;
Fig. 13 is a front sectional view of a second header of the heat exchanger of Fig. 1;
14 is a side cross-sectional view of a header of a heat exchanger according to another embodiment of the present invention;
15 is a view illustrating a flow of a refrigerant during operation of a heating cycle of a heat exchanger according to an embodiment of the present invention.
16 is a view illustrating a flow of a refrigerant when a cooling cycle of a heat exchanger is operated according to an embodiment of the present invention.

Hereinafter, preferred embodiments according to the present invention will be described in detail.

1 is a perspective view illustrating an exterior of a heat exchanger according to an embodiment of the present invention.

Referring to FIG. 1 , in the heat exchanger according to an embodiment of the present invention, a refrigerant flows therein and a plurality of tubes 10 exchanging heat with external air, and a first header in which the plurality of tubes 10 communicate with each other, respectively (100) and the second header 200, the inlet pipe 300 through which external refrigerant flows in during operation of the heating cycle and the refrigerant flows out during operation of the cooling cycle, and during operation of the heating cycle The outlet pipe 400 through which the refrigerant flows out and the external refrigerant flows in during operation of the cooling cycle, the connection pipe 500 connecting the first header 100 and the second header 200, and the inlet A flange 600 for fixing the pipe 300 and the connection pipe 500 to the first header 100 , and a first for fixing the outlet pipe 400 and the connection pipe 500 to the second header 200 . 2 The flange 600, the inlet pipe connection part 310 connecting the inlet pipe 300 and the flange 600, and the outlet pipe connection part 410 connecting the outlet pipe 400 and the flange 600, and connection It includes a connecting pipe connecting portion 510 connecting the pipe 500 and the flange 600 .

The tubes 10 may have a plurality of microchannels formed therein to allow the refrigerant to flow. The tubes 10 may be formed to be flat. The tubes 10 may be arranged in two rows of a front row 11 and a rear row 12 . The tubes 10 may be arranged in an up-down direction. The tubes 10 may be extruded from an aluminum material.

Although not shown in the drawing, heat exchange fins in contact with the tubes may be disposed between the tubes 10 to increase the heat transfer area with the external air, and the heat exchange fins are disposed to contact the walls of the tubes 10 . can be The heat exchange fin may be provided in various known forms such as a corrugated fin, and may have a louver for improving heat transfer and drainage performance. The heat exchange fin may be formed of an aluminum material and be brazed to the tubes 10 .

The first header 100 and the second header 200 may be disposed to be spaced apart from each other by a predetermined distance, and the tubes 10 may be disposed between the first header 100 and the second header 200 . The first header 100 may be disposed above the tubes 10 , and the second header 200 may be disposed below the tubes 10 .

One inlet pipe 300 , one outlet pipe 400 , and one connection pipe 500 may be provided, respectively. The refrigerant may flow into the first header 100 through the inlet pipe 300 , and the refrigerant may flow out from the second header 200 through the outlet pipe 400 . In addition, the refrigerant may flow out into the connection pipe 500 without passing through the tubes 10 and then be introduced into the first header again.

The diameter of the inlet pipe 300 may be larger than the diameter of the connection pipe 500 , and the diameter of the outlet pipe 400 may be provided smaller than the diameter of the connection pipe 500 . A high-temperature, high-pressure gaseous refrigerant that has passed through a compressor (not shown) may be introduced into the inlet pipe 300 . The refrigerant introduced into the inlet pipe 300 may pass through the tubes ( ), lose heat to the outside, and be condensed, and the condensed refrigerant may flow out through the outlet pipe 400 . Accordingly, in this heating cycle, the heat exchanger 1 serves as a condenser.

However, on the contrary, the low-temperature and low-pressure liquid or gaseous refrigerant that has passed through the expansion valve (not shown) is introduced through the outlet pipe 400 , passes through the tubes 10 , takes external heat, and evaporates The refrigerant may be discharged to the outside through the inlet pipe 300 . Accordingly, in this cooling cycle, the heat exchanger 1 may serve as an evaporator. .

Hereinafter, a case in which the heat exchanger of an embodiment of the present invention is used as a condenser will be mainly described, but it is natural that it may be used as an evaporator when the refrigerant circulates in the reverse cycle as described above.

FIG. 2 is a perspective view illustrating an external appearance of the first header of the heat exchanger of FIG. 1 , and FIG. 3 is an exploded perspective view illustrating the configuration of the first header of the heat exchanger of FIG. 1 . FIG. 4 is a side cross-sectional view of a first header of the heat exchanger of FIG. 1 , and FIG. 5 is a plan view illustrating an external appearance of the body of the heat exchanger of FIG. 1 . FIG. 6 is a front cross-sectional view taken through the center of an inlet pipe of a first header of the heat exchanger of FIG. 1 ;

2 to 6 , the first header 100 of the heat exchanger according to an embodiment of the present invention includes a body 110 , a cover 120 coupled to the body 110 , and a body 110 . and chambers 160 , 170 , 180 , 190 provided inside the cover 120 and through which the refrigerant flows.

The body 110 includes a wall 112 and a central partition wall 111 protruding from the center of the wall 112 , and the cover 120 extends from both sides of the lower wall 121 and the lower wall 121 . and a side wall 122 that is

A coupling groove 113 is formed in the wall 112, and the end of the side wall 122 of the cover 120 is inserted into the coupling groove 113, so that the body 110 and the cover 120 can be firmly coupled. . Both the body 110 and the cover 120 may be formed of an aluminum material, the body 110 may be formed of an extruded material, the cover 120 may be formed of a clad material, and the body ( 110 and the cover 120 may be brazed.

The chambers 160 , 170 , 180 , and 190 may be divided into a first chamber 160 and a second chamber 170 by a central partition wall 111 and a cover 120 , and the wall ( A third chamber 180 and a fourth chamber 190 may be partitioned in the inner space formed by the 112 .

A first row of tubes 11 may be connected to the first chamber 160 , and a second row of tubes 12 may be connected to the second chamber 170 . In addition, the refrigerant may be introduced into the first chamber 160 through the inlet pipe 300 , and the refrigerant may be introduced into the second chamber 170 through the connection pipe 500 .

A coupling hole 123 is formed in the center of the lower wall 121 , and a coupling protrusion 111a penetrating the coupling hole 123 is formed at the lower end of the central partition wall 111 , and the coupling protrusion 111a is connected to the coupling hole. By penetrating 123 , the first chamber 160 and the second chamber 170 can be fundamentally isolated.

Both surfaces of the first chamber 160 and the second chamber 170 are open, and cover baffles 130 may be coupled to both ends of the first header 100 to cover the open both surfaces. The cover baffle 130 may be coupled to the first header 100 by being inserted into the cover baffle holes 114 and 127 respectively formed in the body 110 and the cover 120 . The cover baffle 130 may be brazed to the first header 100 . The cover baffles 130 all have the same shape and perform the same function.

Tube holes 124 into which the tubes 10 can be inserted may be formed in the cover 120 . In the cover 120 , an inlet hole 125 through which the refrigerant flowing in through the inlet pipe 300 can pass and a connection pipe hole 126 through which the refrigerant flows into the connecting pipe 500 may be formed.

In addition, the body 110 may include a tube stopper 116 that may limit the insertion depth of the tubes 10 . The tube stopper 116 may protrude from the lower outer side of the wall 116 , and may prevent the tubes 116 from being excessively inserted into the first chamber 160 and the second chamber 170 .

Meanwhile, the first chamber 160 is divided into a first sub-chamber 161 and a second sub-chamber 162 . The first chamber 160 may be divided into a first sub-chamber 161 and a second sub-chamber 162 by a partition baffle 150 coupled to the first header 100 .

The partition baffle 150 may be inserted into the partition baffle hole 115 formed in the body 110 to be coupled to the first header 100 . The partition baffle 150 may be brazed to the first header 100 .

Accordingly, the first sub-chamber 161 of the first chamber and the second sub-chamber 162 of the first chamber include the partition baffle 150 , the cover baffle 130 , the body 110 , and the cover 120 . can be formed by

In this case, the refrigerant may be introduced into the first sub-chamber 161 of the first chamber through the inlet pipe 300 , and the tubes 11 of the first row may be connected to the second sub-chamber 162 of the first chamber. have. The refrigerant flowing into the first sub-chamber 161 of the first chamber may flow into the third chamber 180 through the through-hole 117 , and the refrigerant flowing into the third chamber 180 may be supplied through the distribution hole 118 . ) through the second subchamber 162 of the first chamber. That is, the first chamber 160 is connected to the first sub-chamber 161 into which the refrigerant is introduced by the partition baffle 150 , and the refrigerant from the third chamber 180 flows in and to the tubes 11 in the first row. It is partitioned into a second sub-chamber 162 that becomes

Like the first chamber 160 , the second chamber 170 is divided into a first sub-chamber 171 and a second sub-chamber 172 . The second chamber 170 may be partitioned into a first subchamber 171 and a fourth subchamber 172 by a partition baffle 150 coupled to the first header 100 .

Accordingly, the first subchamber 171 of the second chamber and the second subchamber 172 of the second chamber also include the partition baffle 150 , the cover baffle 130 , the body 110 , and the cover 120 . can be formed by

At this time, the refrigerant may be introduced into the first subchamber 171 of the second chamber through the connection pipe 500 , and the second subchamber 172 of the second chamber may be connected to the tubes 12 of the second row. can The refrigerant flowing into the first subchamber 171 of the second chamber may flow into the fourth chamber 190 through the through hole 117 , and the refrigerant flowing into the fourth chamber 190 may be supplied through the distribution hole 118 . ) through the second subchamber 172 of the second chamber. That is, the second chamber 170 is connected to the first sub-chamber 171 into which the refrigerant is introduced by the partition baffle 150 , and the refrigerant from the fourth chamber 190 into the second row of tubes 12 . It will be partitioned into a second sub-chamber 172 that becomes

Meanwhile, the third chamber 180 and the fourth chamber 190 formed by the wall 112 of the body 110 are the first subchamber 161 of the first chamber and the first subchamber 171 of the second chamber. ) in the longitudinal direction of the first chamber 160 and the second chamber 170 to flow the refrigerant introduced into the second subchamber 162 of the first chamber and the second subchamber 172 of the second chamber, respectively. are placed along The third chamber 180 may serve to evenly distribute the refrigerant that has entered the first subchamber 161 of the first chamber to the tubes 11 of the first row, and the fourth chamber 190 may serve as the second It may serve to evenly distribute the refrigerant that has entered the first subchamber 171 of the chamber to the tubes 12 of the second row.

As a result, the partition baffle 150, the third chamber 180, and the fourth chamber 190 connect the refrigerant flowing into the first chamber 140 through the inlet pipe 300 and the connection pipe ( A heating distributor for evenly distributing the refrigerant entering the second chamber 170 through the 500) to the tubes 10 is configured.

Both surfaces of the third chamber 180 and the fourth chamber 190 are open, and caps 140 are inserted into both ends of the body 110 to cover the open surfaces, so that they can be coupled to the first header 100 . . The cap 140 may be brazed to the first header 100 . The caps 140 all have the same shape and perform the same function.

The third chamber 180 and the fourth chamber 190 are the refrigerants of the first subchamber 161 of the first chamber and the first subchamber 171 of the second chamber introduced through the respective through-holes 117 . the second subchamber 162 and the second chamber of the first chamber in the partition baffle 150 to flow into the second subchamber 162 of the first chamber and the second subchamber 172 of the second chamber, respectively. It may have at least one distribution hole 118 formed in a position spaced apart from the second sub-chamber 172 side of the .

Accordingly, the refrigerant in the first subchamber 161 of the first chamber and the first subchamber 171 of the second chamber introduced through each of the through holes 117 flows into the third chamber 180 and the fourth chamber, respectively. It may flow into the second sub-chamber 162 of the first chamber and the second sub-chamber 172 of the second chamber by sequentially passing through the inner space of 190 and the distribution hole 118 .

5 , the through-holes 117 and the distribution holes 118 of the third chamber 180 and the fourth chamber 190 have the first length in the longitudinal direction of the first header 100 . It may be preferable to be formed longer than the length along the width direction of the header 100 , and it may be preferable to be formed downward toward the first chamber 160 and the second chamber 170 .

In addition, one through hole 117 of the third chamber 180 and the fourth chamber 190 may be preferably formed, and the distribution hole 118 of the third chamber 180 and the fourth chamber 190 . ) may be preferably formed so that three are spaced apart from each other by a predetermined distance.

6 , the refrigerant introduced into the inner space of the third chamber 180 flows to the second sub-chamber 162 of the first chamber through the distribution hole 118 , and the tubes of the first row (11) can be distributed equally. In FIG. 6 , the solid line indicates the flow of refrigerant during heating operation, and the dotted line indicates the flow of refrigerant during cooling operation, which will be described later.

With such a structure, the refrigerant introduced into the inner space of the fourth chamber 190 flows to the second sub-chamber 172 of the second chamber through the distribution hole 118 , and flows through the tubes 12 in the second row. can be evenly distributed.

As a result, the refrigerant flowing into the first chamber 160 through the inlet pipe 300 may be evenly distributed and distributed to the tubes 11 of the first row, and the second chamber 170 through the connection pipe 500 . The refrigerant flowing into the can be evenly distributed and distributed to the tubes 12 of the second row.

In addition, the refrigerant flowing into the first subchamber 161 of the first chamber and the first subchamber 171 of the second chamber flows into the inner space of the third chamber 180 and the fourth chamber 190 before flowing. It may be mixed and stabilized by itself in the first subchamber 161 of the first chamber and the first subchamber 171 of the second chamber. Accordingly, the distribution and heat exchange efficiency of the refrigerant can be increased.

7 is a cross-sectional side view of the first header for showing the coupling structure of the inlet pipe and the connection pipe of the heat exchanger of FIG. 1, and FIG. 8 is a periphery of the inlet pipe and the connection pipe of the heat exchanger of FIG. It is a flat view.

7 and 8 , in the heat exchanger according to an embodiment of the present invention, the inlet pipe 300 is to be firmly coupled to the first header 100 through the inlet connector 310 and the flange 600 . can The connecting pipe 500 may be firmly coupled to the first header 100 through the connecting pipe connecting pipe 510 and the flange 600 .

The inlet connecting pipe 310 and the connecting pipe connecting pipe 510 are formed of a stainless material, the inlet pipe 300 and the connecting pipe 500 formed of a copper material, and the first header 100 formed of an aluminum material, and Corrosion due to bonding of different materials of the flange 600 can be prevented.

7, the inlet pipe 300 and the connecting pipe 500 are fitted into the expanded pipe part 311 of the inlet connector 310 and the expanded pipe part 511 of the connecting pipe connector 510, respectively. It can be bonded and brazed bonded.

The inlet connector 310 and the connecting pipe connector 510 may be brazed to the flange 600 . At this time, a solder ring coupling groove 113 is formed on the outer surface of the flange 600 , and by inserting the solder rings 320 and 520 into the solder ring coupling groove 113 , the inlet connection pipe 310 and the connection pipe connection pipe The 510 may be easily brazed to the flange 600 .

The flange 600 may be brazed to the outer surface of the first header 100 . In addition, the flange 600 may be riveted to the first header 100 to reinforce the coupling force. To this end, rivet holes 620 and 128 may be formed in the flange 600 and the first header 100, respectively.

In this case, an insertion groove 630 into which the coupling protrusion 111a of the central partition wall 111 of the first header 100 is inserted may be formed in the upper portion of the flange 600 . As described above, the coupling protrusion 111a is for fundamentally isolating the first chamber 160 and the second chamber 170 of the first header 100 .

With such a structure, the external refrigerant may be introduced into the first chamber 160 through the inlet pipe 300 , the inlet connection pipe 310 , the flange 600 , and the inlet hole 125 sequentially, , the refrigerant flowing in from the second header 200 through the connecting pipe 500 passes through the connecting pipe connecting pipe 510 , the flange 600 , and the connecting pipe hole 126 in sequence to the second chamber 140 . can be introduced into

Similar to the structure in which the inlet pipe 300 and the connecting pipe 500 are connected to the first header 100, the outlet pipe 400 in the heat exchanger according to an embodiment of the present invention includes the outlet connecting pipe 410 and the flange ( It may be firmly coupled to the second header 00 through 600 , and the connection pipe 500 may be firmly coupled to the second header 200 through the connection pipe connection pipe 510 and the flange 600 . have.

The outlet connector 410 and the connecting pipe connector 510 are made of stainless steel, and the outlet pipe 400 and connecting pipe 500 are made of copper and the second header 200 is made of aluminum. Corrosion due to bonding of different materials of the flange 600 can be prevented.

The outlet pipe 400 and the connecting pipe 500 may be fitted and brazed to the expanded pipe portion 411 of the outlet connecting pipe 410 and the expanded pipe portion 511 of the connecting pipe connecting pipe 510 , respectively.

The outlet connector 410 and the connecting pipe connector 510 may be brazed to the flange 600 . At this time, a solder ring coupling groove 113 is formed on the outer surface of the flange 600 , and by inserting the solder rings 420 and 520 into the solder ring coupling groove 113 , the outlet connection pipe 410 and the connection pipe connection pipe The 510 may be easily brazed to the flange 600 .

The flange 600 may be brazed to the outer surface of the second header 200 . In addition, the flange 600 may be riveted to the second header 200 to reinforce the coupling force. To this end, rivet holes 620 and 128 may be formed in the flange 600 and the second header 200, respectively.

In this case, an insertion groove 630 into which the coupling protrusion 111a of the central partition wall 111 of the second header 200 is inserted may be formed in the lower portion of the flange 600 . As described above, the coupling protrusion 111a is for fundamentally isolating the fifth chamber 260 and the sixth chamber 270 of the second header 200 .

With this structure, the refrigerant passing through the tubes 11 of the first row is connected to the fifth chamber 260 , the connecting pipe hole 126 , the flange 600 , the connecting pipe connecting pipe 510 , The refrigerant passing through the pipe 500 in turn may be introduced into the first header 100 , and the refrigerant passing through the tubes 12 of the second row is the sixth chamber 270 , the outlet pipe hole 225 , and the flange. 600 , the outlet connection pipe 410 , and the outlet pipe 400 may pass through in sequence to flow out to the outside.

9 is a perspective view illustrating an external appearance of the second header of the heat exchanger of FIG. 1 , and FIG. 10 is an exploded perspective view illustrating the configuration of the second header of the heat exchanger of FIG. 1 . 11 is a cross-sectional side view of the second header of the heat exchanger of FIG. 1 , FIG. 12 is a plan view illustrating an external appearance of the body of the second header of the heat exchanger of FIG. 1 , and FIG. 13 is the second header of the heat exchanger of FIG. 1 . This is a front sectional view of the header.

9 to 13 , the second header 200 of the heat exchanger according to the embodiment of the present invention includes a body 210 , a cover 220 coupled to the body 210 , and a body 210 , It is formed inside the cover 220 and includes chambers 260 , 270 , 280 and 290 in which the refrigerant flows.

The body 210 of the second header 200 includes a wall 112 and a central partition 111 protruding from the center of the wall 112 , and the cover 220 includes an upper wall 121 and an upper wall. and sidewalls 122 extending from both sides of 121 .

A coupling groove 113 is formed in the wall 112, and the end of the side wall 122 of the cover 220 is inserted into the coupling groove 113, so that the body 210 and the cover 220 can be firmly coupled. . Both the body 210 and the cover 220 may be formed of an aluminum material, the body 210 may be formed of an extruded material, the cover 220 may be formed of a clad material, and the body 210 and the cover may be formed of a clad material. 220 may be brazed.

The chambers 260, 270, 280, and 290 may be divided into a fifth chamber 260 and a sixth chamber 270 by a central partition wall 111 and a cover 220, and the wall ( The inner space formed by the 112 may be divided into a seventh chamber 280 and an eighth chamber 290 .

A first row of tubes 11 may be connected to the fifth chamber 260 , and a second row of tubes 12 may be connected to the sixth chamber 270 . Also, the refrigerant may flow from the fifth chamber 260 through the connection pipe 500 , and the refrigerant may flow out from the sixth chamber 270 through the outlet pipe 400 . A coupling hole 123 is formed in the center of the upper wall 121 , and a coupling protrusion 111a penetrating the coupling hole 123 is formed at the upper end of the central partition wall 111 , and the coupling protrusion 111a is connected to the coupling hole. By penetrating 123 , the fifth chamber 260 and the sixth chamber 270 may be fundamentally isolated.

Both surfaces of the fifth chamber 260 and the sixth chamber 270 are open, and a cover baffle 130 may be coupled to both ends of the second header 200 to cover the open both surfaces. The cover baffle 130 may be coupled to the second header 200 by being inserted into the cover baffle holes 114 and 127 respectively formed in the body 210 and the cover 220 . The cover baffle 130 may be brazed to the second header 200 . The cover baffles 130 all have the same shape and perform the same function.

Tube holes 124 into which the tubes 10 can be inserted may be formed in the cover 220 . In the cover 220 , an outlet hole 225 through which the refrigerant flowing out through the outlet pipe 400 can pass and a connection pipe hole 126 through which the refrigerant flows into the connecting pipe 500 may be formed.

In addition, the body 210 may include a tube stopper 116 that may limit the insertion depth of the tubes 10 . The tube stopper 116 may protrude from the lower outer side of the wall 112 , and may prevent the tubes 10 from being excessively inserted into the fifth chamber 260 and the sixth chamber 270 .

Meanwhile, the fifth chamber 260 is divided into a first subchamber 261 and a sixth subchamber 262 . The fifth chamber 260 may be divided into a first subchamber 261 and a second subchamber 262 by a partition baffle 150 coupled to the second header 200 .

The partition baffle 150 may be inserted into the partition baffle hole 115 formed in the body 210 to be coupled to the first header 200 . The partition baffle 150 may be brazed to the second header 200 .

Accordingly, the first subchamber 261 of the fifth chamber and the second subchamber 262 of the fifth chamber include the partition baffle 150 , the cover baffle 130 , the body 210 , and the cover 220 . can be formed by

In this case, the refrigerant may flow out from the first subchamber 261 of the fifth chamber through the connection pipe 500 , and the tubes 11 of the first row may be connected to the second subchamber 262 of the fifth chamber. have. The refrigerant flowing into the second sub-chamber 262 of the fifth chamber may flow to the seventh chamber 280 through the distribution hole 218 , and the refrigerant flowing into the seventh chamber 280 may be passed through the through-hole 117 . ) through the first sub-chamber 261 of the fifth chamber. That is, the fifth chamber 260 includes the second subchamber 262 connected to the tubes 11 of the first row by the partition baffle 150 , the refrigerant of the seventh chamber 280 flows in, and the connection pipe It is divided into the first sub-chamber 261 through which the refrigerant flows to 500 .

Like the fifth chamber 260 , the sixth chamber 270 is divided into a first subchamber 271 and a second subchamber 272 . The sixth chamber 270 may be partitioned into a first subchamber 271 and a second subchamber 272 by a partition baffle 150 coupled to the second header 200 .

Accordingly, the first subchamber 271 of the sixth chamber and the second subchamber 272 of the sixth chamber also include the partition baffle 150 , the cover baffle 130 , the body 110 , and the cover 120 . can be formed by

At this time, the refrigerant may flow out from the first subchamber 271 of the sixth chamber through the outlet pipe 400 , and the second subchamber 262 of the sixth chamber may be connected to the tubes 12 in the second row. have. The refrigerant introduced into the second sub-chamber 262 of the sixth chamber may flow to the eighth chamber 290 through the distribution holes 219a and 219b, and the refrigerant introduced into the eighth chamber 290 may pass through the through hole. It may flow into the first subchamber 271 of the sixth chamber through 117 . That is, the sixth chamber 270 includes the second sub-chamber 272 connected to the tubes 12 of the second row by the partition baffle 150, and the refrigerant of the eighth chamber 290 is introduced and the outlet pipe ( It is divided into the first sub-chamber 271 through which the refrigerant flows to 400).

Meanwhile, the seventh chamber 280 and the eighth chamber 290 formed by the wall 112 of the body 210 are the second subchamber 262 of the fifth chamber and the second subchamber 272 of the sixth chamber. ) in the longitudinal direction of the fifth chamber 260 and the sixth chamber 270 to flow the refrigerant introduced into the first subchamber 261 of the fifth chamber and the first subchamber 271 of the sixth chamber, respectively. are placed along The seventh chamber 280 evenly distributes and accommodates the refrigerant that has entered the second subchamber 262 of the fifth chamber from the tubes 11 of the first row and flows toward the first subchamber 261 of the fifth chamber. The eighth chamber 290 evenly distributes and receives the refrigerant that has entered the second subchamber 272 of the sixth chamber from the tubes 12 of the second row, and receives the first of the sixth chamber It may serve to flow toward the sub-chamber 271 side.

As a result, the partition baffle 150, the seventh chamber 280, and the eighth chamber 290 are combined with the refrigerant flowing into the fifth chamber 260 through the tubes 11 of the first row during operation of the heating cycle. Heating for evenly distributing and accommodating the refrigerant entering the sixth chamber 270 through the second row tubes 12 , evenly discharging the refrigerant from the tubes 10 to the connection pipe 500 and the outlet pipe 400 . make up a divider.

Both sides of the seventh chamber 280 and the eighth chamber 290 are open, and the cap 140 is inserted into both ends of the body 210 to cover the open both sides, thereby being coupled to the second header 200 . . The cap 140 may be brazed to the second header 200 . The caps 140 all have the same shape and perform the same function.

The seventh chamber 280 and the eighth chamber 290 evenly distribute the refrigerant of the tubes 10 flowing into the second subchamber 262 of the fifth chamber and the second subchamber 272 of the sixth chamber. at least one distribution hole 218 formed at a position spaced apart from each other by a predetermined distance from the partition baffle 150 toward the second subchamber 262 of the fifth chamber and the second subchamber 272 of the sixth chamber to accommodate the 219a, 219b). In addition, the seventh chamber 280 and the eighth chamber 290 receive the refrigerant introduced from the second subchamber 262 of the fifth chamber and the second subchamber 272 of the sixth chamber, respectively. The first sub-chamber 261 and the through-hole 117 may be provided to flow into the first sub-chamber 271 of the sixth chamber.

Accordingly, the refrigerant in the second sub-chamber 262 of the fifth chamber and the second sub-chamber 272 of the sixth chamber introduced through the respective distribution holes 218, 219a, and 219b through the seventh chamber 280, respectively. ) and the inner space of the eighth chamber 290 and the through-hole 117 sequentially to flow into the first subchamber 262 of the fifth chamber and the first subchamber 271 of the sixth chamber.

12 , the length of the through-holes 117 of the seventh chamber 280 and the eighth chamber 290 in the longitudinal direction of the second header 200 is the width of the second header 200 , as shown in FIG. 12 . It may be preferred to be formed longer than the length along the direction. In addition, it may be preferable that the distribution hole 218 of the seventh chamber 280 is formed to have a length along the longitudinal direction of the second header 200 longer than a length along the width direction of the second header 200, It may be preferable to be formed upward to face the fifth chamber 260 . On the other hand, in the distribution holes 219a and 219b of the eighth chamber 290, it may be preferable that the diameter of the distribution hole 219a on the through hole 117 side is smaller than the diameter of the distribution hole 219b on the other side, It may be preferable to be formed upward to face the sixth chamber 270 .

In addition, one through hole 117 of the seventh chamber 280 and the eighth chamber 290 may be preferably formed, and the distribution hole 218 of the seventh chamber 280 and the eighth chamber 290 . , 219a, 219b) may be preferably formed in two to be spaced apart from each other by a predetermined distance.

In the flow of refrigerant to be described below, the refrigerant passing through the distribution holes 218, 219a, 219b of the seventh chamber 280 and the eighth chamber 290 may be a liquid refrigerant, and the distribution formed in different sizes The holes 218, 219a, and 219b may be effective for distribution of liquid refrigerant.

13 , the refrigerant flowing into the second sub-chamber 262 of the fifth chamber from the tubes 11 of the first row enters the seventh chamber 280 through the distribution hole 218 . It may be uniformly introduced into the space, may flow into the first sub-chamber 261 of the fifth chamber, and may flow out into the connection pipe 500 . In FIG. 13 , a solid line indicates a flow of refrigerant during a heating operation, and a dotted line indicates a flow of refrigerant during a cooling operation, which will be described later.

With such a structure, the refrigerant flowing into the second subchamber 272 of the sixth chamber from the tubes 12 of the second row flows into the inner space of the eighth chamber 290 through the distribution holes 219a and 219b. It may flow in evenly, flow into the first sub-chamber 271 of the sixth chamber, and may flow out into the outlet pipe 400 .

As a result, the refrigerant flowing into the fifth chamber 260 through the tubes 11 of the first row may be evenly distributed and flow out into the connection pipe 500 , and the sixth chamber through the tubes 12 of the second row The refrigerant flowing into the 270 may be evenly distributed and discharged into the outlet pipe 400 .

In addition, the refrigerant introduced into the seventh chamber 280 and the eighth chamber 290 flows into the first subchamber 261 of the fifth chamber and the first subchamber 271 of the sixth chamber before flowing into the seventh chamber 280 and the eighth chamber 290 may be mixed and stabilized by themselves. In addition, the refrigerant flowing into the first subchamber 261 of the fifth chamber and the first subchamber 271 of the sixth chamber flows into the second subchamber of the fifth chamber before flowing out into the connection pipe 500 and the outlet pipe 400 . Mixing and stabilization may be performed once again in the first subchamber 261 and the first subchamber 271 of the sixth chamber. Accordingly, the circulation and heat exchange efficiency of the refrigerant may be increased.

14 is a side cross-sectional view of a header of a heat exchanger according to another embodiment of the present invention. Although the header provided above the tubes 10 is illustrated, the header may be a header provided under the tubes 10 in a vertically symmetrical form. The same reference numerals are assigned to the same components as those of the embodiment shown in FIG. 4, and descriptions thereof may be omitted.

14, the header 100 of the heat exchanger according to another embodiment of the present invention includes a body 110, a first cover 120a and a second cover 120b coupled to the body 110, The body 110, the first cover (120a), and the second cover (120b) is provided in the interior and includes chambers (160, 170, 180, 190) in which the refrigerant flows.

The first cover 120a and the second cover 120b include lower walls 121a and 121b, respectively, and side walls 122a and 122b extending from both sides of the lower walls 121a and 121b.

The first chamber 160 is formed by the wall 112 and the first cover 120a of the body 110, and the second chamber 170 is formed by the wall of the body 110 and the second cover 120b. can be formed. An internal space formed by the wall 112 of the body 110 may be divided into a third chamber 180 and a fourth chamber 190 .

Tube holes 124 into which the tubes 11 of the first row can be inserted may be formed in the first cover 120a, and an inlet hole through which refrigerant flowing in through the inlet pipe 300 may pass. 125) can be formed. Tube holes 124 into which the tubes 12 of the second row can be inserted may be formed in the second cover 120b, and a connection pipe hole 126 through which the refrigerant flows to the connection pipe 500 is formed. can be

Hereinafter, the flow of the refrigerant in the heat exchanger according to the embodiment of the present invention having the above structure will be described.

15 is a diagram illustrating a flow of refrigerant during a cooling cycle operation of a heat exchanger according to an embodiment of the present invention, and FIG. 16 is a diagram illustrating a heating cycle of the heat exchanger of the heat exchanger according to an embodiment of the present invention It is a diagram showing the flow of the refrigerant.

A heat exchanger according to an embodiment of the present invention includes a first header 100 having a first chamber 160 , a second chamber 170 , a third chamber 180 , and a fourth chamber 190 , and a fifth chamber ( 260 ), a second header 200 having a sixth chamber 270 , a seventh chamber 280 , and an eighth chamber 290 , and arranged in two rows of a first row 11 and a second row 12 . and tubes 10 that are The heat exchanger may further include a heat exchange fin disposed between the tubes 10 . In addition, an inlet pipe 300 communicating with the outside of the heat exchanger 1 is connected to the first chamber 160 , and the third chamber 180 and the fifth chamber 260 are connected by a connection pipe 500 , An outlet pipe 400 leading to the outside is connected to the seventh chamber 280 .

The refrigerant flowing into the first chamber 160 of the first header 100 through the inlet pipe 300 is first mixed and stabilized in the first sub-chamber 161 of the first chamber, and then the through-hole 117 is formed. through the third chamber 180 . The refrigerant flowing into the third chamber 180 is distributed to the second subchamber 162 of the first chamber through the distribution hole 118 , and the refrigerant flowing into the second subchamber 162 of the first chamber is uniformly distributed. can be distributed to the tubes 11 of the first row.

The refrigerant passes through the tubes 11 of the first row, exchanges heat with external air, and flows into the second sub-chamber 262 of the fifth chamber disposed in the second header 200 . Since the refrigerant flowing into the second subchamber 262 of the fifth chamber is distributed through the distribution hole 218 and introduced into the seventh chamber 280 , the refrigerant passing through the first thermal tubes 11 flows evenly do. In the seventh chamber 280 , the refrigerant may be secondarily mixed and stabilized.

The refrigerant of the seventh chamber 280 flows to the first subchamber 261 of the fifth chamber through the through hole 117, and the refrigerant flowing into the first subchamber 261 of the fifth chamber is mixed again and It is stabilized and may flow to the first subchamber 171 of the second chamber of the first header 100 without heat exchange through the connection pipe 500 .

The refrigerant introduced into the first subchamber 171 of the second chamber through the connection pipe 500 flows into the fourth chamber 190 through the through hole 117 after mixing and stabilization. The refrigerant flowing into the fourth chamber 190 is distributed to the second subchamber 172 of the second chamber through the distribution hole 118 , and the refrigerant flowing into the second subchamber 172 of the second chamber is uniformly distributed. to the second row of tubes 12 .

The refrigerant passes through the tubes 12 of the second row, exchanges heat with external air once again, and flows into the second subchamber 272 of the sixth chamber disposed in the second header 200 . Since the refrigerant flowing into the second subchamber 272 of the sixth chamber is distributed through the distribution holes 219a and 219b and flows into the eighth chamber 290, the refrigerant passing through the second thermal tubes 12 is evenly distributed. is moving In the eighth chamber 290 , the refrigerant may be mixed and stabilized again.

The refrigerant of the eighth chamber 290 flows to the first subchamber 271 of the sixth chamber through the through hole 117, and the refrigerant flowing into the first subchamber 271 of the sixth chamber is mixed again and It is stabilized and flows out of the heat exchanger 1 through the outlet pipe 400 .

The flow of the refrigerant described above is when the heat exchanger according to an embodiment of the present invention is used as a condenser, that is, when the heat exchanger is operated in a heating cycle. When the heat exchanger is used as a condenser, a high-temperature and high-pressure gaseous refrigerant may be introduced as the refrigerant. This refrigerant is condensed by taking heat away from the outside while passing through the tubes 10, and as shown in FIG. The refrigerant may flow to the first header 100 provided on the upper portions of the tubes 10 through the connection pipe 500 , and may flow in the gravity direction through the tubes 10 to exchange heat. By doing so, the increase in viscosity and density as the refrigerant is condensed does not act as a resistance to the refrigerant flow.

In addition, since the headers provided on the upper and lower portions of the tubes 10 include a plurality of compartmentalized chambers, distribution, mixing, and stabilization every time they pass through each chamber, the circulation of the refrigerant is improved and the efficiency of heat exchange is increased. can

On the other hand, when the refrigerant circulates in a reverse cycle in the heat exchanger according to an embodiment of the present invention, the heat exchanger may be used as an evaporator to operate in a cooling cycle.

When the heat exchanger is used as the evaporator, the low-temperature and low-pressure liquid refrigerant may be introduced through the outlet pipe 400 . This liquid refrigerant is evaporated by taking heat from the outside while passing through the tubes (10). 16, when the heat exchanger according to an embodiment of the present invention is operated in a cooling cycle, the refrigerant flows in the opposite direction to gravity in both the tubes 11 and 12 of the first row and the second row. By doing so, it is possible to facilitate circulation of the evaporated refrigerant in the heat exchanger.

Also, as in the heating cycle operation, the refrigerant is distributed, mixed, and stabilized every time it passes through a plurality of compartmentalized chambers of the header provided on the upper and lower portions of the tubes 10, so that the circulation of the refrigerant is improved and the efficiency of heat exchange is improved. can be increased

Although the technical idea of the present invention has been described with reference to specific embodiments, the scope of the present invention is not limited to these embodiments.

Various embodiments that can be modified or modified by those of ordinary skill in the art within the scope that do not deviate from the spirit of the present invention specified in the claims will also fall within the scope of the present invention.

1: heat exchanger 10: tubes
11: first row of tubes 12 second row of tubes
100: first header 110: body
111: central bulkhead 111a: coupling projection
112: wall 113: coupling groove
114: cover baffle hole 115: compartment baffle hole
116: tube stopper 117: through hole
118: distribution hole 120: cover
120a: first cover 120b: second cover
121: lower wall (upper wall) 121a: first lower wall
121b: second lower wall 122: side wall
122a: first sidewall 122b: second sidewall
123: coupling hole 124: tube hole
125: inlet hole 126: connection pipe hole
127: cover baffle hole 128: rivet hole
130: cover baffle 140: cap
150: compartment baffle 160: first chamber
161: first subchamber of first chamber 162: second subchamber of first chamber
170: second chamber 171: first sub-chamber of the second chamber
172: second sub-chamber of the second chamber 180: third chamber
190: fourth chamber 200: second header
210: body 218: distribution hole
219a: distribution hole 219b: second distribution hole
220: cover 225: outlet hole
260: fifth chamber 261: first sub-chamber of the fifth chamber
262: second sub-chamber of the fifth chamber 270: sixth chamber
271: first sub-chamber of the sixth chamber 272: second sub-chamber of the sixth chamber
280: seventh chamber 290: eighth chamber
300: inlet pipe 310: inlet connector
311: expansion pipe 320: solder ring
400: outlet pipe 410: outlet connector
411: expansion pipe 420: solder ring
500: connection pipe 510: connection pipe connection pipe
511: expansion pipe 520: solder ring
600: flange 610: solder ring coupling groove
620: rivet hole 630: insertion groove

Claims (24)

Tubes having a refrigerant flowing therein and exchanging heat with external air, and arranged in a plurality of rows of a first row and a second row;
a first header connected to the ends of the tubes;
a second header connected to the other ends of the tubes;
an inlet pipe through which a refrigerant is introduced into the first header from the outside;
an outlet pipe through which the refrigerant flows out from the second header; and
a connection pipe provided so that the refrigerant flows in a detour from the second header to the first header without passing through the tubes;
including,
A diameter of the inlet pipe is greater than a diameter of the connecting pipe, and a diameter of the outlet pipe is smaller than a diameter of the connecting pipe. According to claim 1,
The first header includes a first chamber through which tubes in a first row and a refrigerant flow, a second chamber through which tubes in a second row and a refrigerant flow, and a third chamber for distributing the refrigerant to the first chamber. A heat exchanger comprising: a chamber; and a fourth chamber distributing a refrigerant to the second chamber. 3. The method of claim 2,
The first chamber includes a first sub-chamber into which the refrigerant flows from the inlet pipe, and a second sub-chamber through which the refrigerant flows from the third chamber to flow the refrigerant to the tubes of the first row,
The second chamber includes a first subchamber into which the refrigerant flows from the connection pipe and a second subchamber through which the refrigerant flows from the fourth chamber to the tubes in the second row. energy. 4. The method of claim 3,
The third chamber includes a through hole through which a coolant is introduced from the first subchamber of the first chamber, and a predetermined interval in the longitudinal direction of the third chamber to distribute the coolant to the second subchamber of the first chamber. It includes a plurality of distribution holes arranged to be spaced apart,
The fourth chamber includes a through hole provided to introduce a refrigerant from the first subchamber of the second chamber, and a predetermined interval in the longitudinal direction of the fourth chamber to distribute the refrigerant to the second subchamber of the second chamber. A heat exchanger comprising a plurality of distribution holes arranged to be spaced apart. 5. The method of claim 4,
The distribution hole of the third chamber and the fourth chamber has a length along a longitudinal direction of the first header longer than a length along a width direction of the first header. 5. The method of claim 4,
The third chamber and the fourth chamber each have three distribution holes. 5. The method of claim 4,
The distribution hole of the third chamber is formed to have a length in a longitudinal direction of the third chamber longer than a length in a width direction of the third chamber,
In the distribution hole of the fourth chamber, a diameter of the distribution hole on the through-hole side of the fourth chamber is smaller than a diameter of the distribution hole on the other side. 8. The method of claim 7,
The third chamber and the fourth chamber each have two distribution holes,
The heat exchanger, characterized in that the diameter of the distribution hole on the side of the through hole of the fourth chamber is formed to be 5 mm or less. 3. The method of claim 2,
and the first header includes cover baffles coupled to both ends of the first header to seal open both ends of the first chamber and the second chamber. 3. The method of claim 2,
and the first header includes caps coupled to both ends of the first header to seal open both ends of the third chamber and the fourth chamber. 4. The method of claim 3,
wherein the first header includes a partition baffle partitioning the first subchamber and the second subchamber of the first chamber, and a partition baffle partitioning the first subchamber and the second subchamber of the second chamber Heat exchanger, characterized in that. According to claim 1,
The first header includes a first chamber in which the inlet pipe communicates with the tubes in the first row, a second chamber in which the connection pipe communicates with the tubes in the second row, and a third chamber in communication with the first chamber; , comprising a fourth chamber in communication with the second chamber,
The second header includes a fifth chamber in which the connecting pipe communicates with the tubes in the first row, a sixth chamber in which the outlet pipe communicates with the tubes in the second row, and a seventh chamber in communication with the fifth chamber; , a heat exchanger comprising an eighth chamber in communication with the sixth chamber. 13. The method of claim 12,
The first chamber includes a first sub-chamber in which the inlet pipe communicates, and a second sub-chamber in which the tubes in the first row communicate;
The second chamber includes a first sub-chamber in which the connection pipe communicates, and a second sub-chamber in which the tubes in the second row communicate,
The fifth chamber includes a first sub-chamber in which the connection pipe communicates, and a second sub-chamber in which the tubes in the first row communicate,
The sixth chamber includes a first subchamber in which the outlet pipe communicates, and a second subchamber in which the tubes in the second row communicate. 14. The method of claim 13,
The third chamber includes a plurality of through-holes through which the first sub-chamber of the first chamber communicates, a plurality of spaced apart from each other by a predetermined distance in the longitudinal direction of the first header, and a plurality of second sub-chambers of the first chamber communicate with each other. including a distribution hole;
The fourth chamber includes a plurality of through-holes through which the first sub-chamber of the second chamber communicates, a plurality of spaced apart from each other by a predetermined distance in the longitudinal direction of the first header, and a plurality of second sub-chambers of the second chamber communicate with each other. including a distribution hole;
The seventh chamber includes a plurality of through-holes through which the first sub-chamber of the fifth chamber communicates, a plurality of spaces spaced apart from each other by a predetermined distance in the longitudinal direction of the second header, and a plurality of second sub-chambers of the fifth chamber communicate with each other. including a distribution hole;
The eighth chamber includes a plurality of through-holes through which the first sub-chamber of the sixth chamber communicates, a plurality of spaces spaced apart from each other by a predetermined distance in the longitudinal direction of the second header, and through which the second sub-chambers of the sixth chamber communicate. A heat exchanger comprising a distribution hole. 15. The method of claim 14,
The distribution holes of the third chamber and the fourth chamber are formed so that a length in a longitudinal direction of the first header is longer than a length in a width direction of the first header;
The distribution hole of the seventh chamber is formed to have a length in a longitudinal direction of the seventh chamber longer than a length in a width direction of the seventh chamber,
In the distribution hole of the eighth chamber, a diameter of the distribution hole on the through-hole side of the eighth chamber is smaller than a diameter of the distribution hole on the other side. According to claim 1,
The first header includes a body and a cover,
The cover is coupled to the body to form a first chamber through which the tubes of the first row and the refrigerant can flow, and a second chamber through which the tubes of the second row and the refrigerant can flow,
The body comprises a third chamber for distributing the refrigerant to the first chamber, and a fourth chamber for distributing the refrigerant to the second chamber. 17. The method of claim 16,
The body includes a central partition wall dividing the first chamber and the second chamber,
The heat exchanger, characterized in that the cover includes a coupling hole through which a part of the central partition wall passes. 17. The method of claim 16,
The body of the first header includes a wall defining an interior space and a tube stopper protruding from the wall toward the tubes to limit an insertion depth of the tubes. 17. The method of claim 16,
The body of the first header is formed of an aluminum extruded material,
The cover of the first header is formed of an aluminum clad material,
The heat exchanger, characterized in that the cover is coupled to the body by brazing. 17. The method of claim 16,
The cover comprises a first cover forming the first chamber and a second cover forming the second chamber. delete delete delete delete

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