KR100350946B1 - Laminate type heat exchanger for vehicle - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated heat exchanger, and it is an object of the present invention to provide a laminated heat exchanger capable of compacting a heat exchanger and an air conditioning case and minimizing the thickness of the heat exchanger while maintaining heat exchange performance.

Each plate constituting the stacked heat exchanger according to the present invention is partitioned vertically into the first heat exchange part 21 and the second heat exchange part 22. The first heat exchanger 21 has a first hole cup 211, the lower end of the second heat exchanger 22, the second and third hole cups (222, 223) before and after the upper end of the second heat exchanger 22, the fourth 5 hole cups 224 and 225 are formed. Compartment ribs 23 are formed between the second and third hole cups 222 and 223 and between the fourth and fifth hole cups 224 and 225. The second and third hole cups 222 and 223 of the leftmost furnace tank plate 2L communicate with the refrigerant inlet 411 of the first end plate 41, and the first hole cup 211 of the leftmost furnace tank plate 2L is provided. It communicates with the refrigerant discharge port 412 of the first end plate 41. The fourth and fifth hole cups 224 and 225 of the leftmost furnace tank plate 2L are blocked. The fourth and fifth hole cups 224 and 225 of the rightmost furnace tank plate 2R are blocked and the second and third hole cups 222 and 223 of the rightmost furnace tank plate 2R communicate with the first hole cup 211. The second and third hole cups 222 and 223 of the center plate 2C are blocked.

Description

Multilayer Heat Exchanger {LAMINATE TYPE HEAT EXCHANGER FOR VEHICLE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated heat exchanger constituting an air conditioner for automobiles, and more particularly, to a laminated heat exchanger capable of compacting a heat exchanger by minimizing its thickness and improving heat exchange performance.

In general, a laminated heat exchanger is formed by alternately stacking flat tubes consisting of two plates joined to each other and heating fins, and double tank type having a tank part on both sides of the top and bottom, and a single tank type having a tank part on one of the upper and lower sides. do. In addition, the tank portion is connected to the refrigerant inlet pipe and the refrigerant discharge pipe for the inlet and discharge of the refrigerant toward the front of the heat exchanger. In such a general stack type heat exchanger, the refrigerant passage area is reduced by all the beads within a limited small plate width, and the refrigerant flow rate flowing from the refrigerant inlet pipe is passed through one tank (one tank type) or each tank (both tank type). There is a problem that the refrigerant passage flow path is long when the U-turn flows. In addition, the process of connecting the pipes is not only added, but the space of the pipes must be secured in the air conditioning case, thereby increasing the size of the air conditioning case, and also causing air flow loss due to air resistance generated by the pipes.

On the other hand, in order to make the heat exchanger and the air conditioning case compact, the laminated heat exchanger as disclosed in Japanese Patent Laid-Open No. 11-63881 has been proposed.

This heat exchanger is provided with many intermediate plates of parallel shape, and two pair of end plates arrange | positioned one by one on the outside of a left side as shown. A fluid introduction flow path and a fluid discharge flow path separated therefrom are formed between the left end plates. In addition, the volume of the upper tank portion is approximately half the volume of the lower tank portion. According to the heat exchanger, since the inlet pipe of the refrigerant is connected to the left end plate and arranged on the side of the heat exchanger, the assembling process of the inlet pipe is omitted, while the inlet pipe is placed outside of the air conditioning case. It can be made compact.

However, in the laminated heat exchanger of Japanese Patent Laid-Open No. 11-63881, the refrigerant flows in and flows out through the upper tank portion, which is about half the volume of the lower tank portion, and flows out of the plates and the lower tank portion. There is a problem that the heat exchange efficiency is lowered as a whole and the refrigerant flow distribution is uneven.

The present invention has been made to solve the conventional problems as described above, the object of the present invention is to provide a laminated heat exchanger that can be made compact by increasing the heat exchanger by minimizing the thickness.

1 is a schematic exploded perspective view showing a flat tube constituting a laminated heat exchanger according to Embodiment 1 of the present invention.

FIG. 2 is a front view illustrating a plate constituting the flat tube of FIG. 1. FIG.

3 is a cross-sectional view taken along the line III-III of FIG. 2.

4 is a cross-sectional view taken along the line IV-IV of FIG. 2.

5 is a cross-sectional view illustrating the flat tube of FIG. 1.

6 is a perspective view illustrating a refrigerant flow structure of a stacked heat exchanger according to Embodiment 1 of the present invention.

7 is a schematic cross-sectional view of a stacked heat exchanger according to Embodiment 1 of the present invention.

8 is a left side view of the stacked heat exchanger according to Embodiment 1 of the present invention.

9 is a perspective view illustrating a refrigerant flow structure of a stacked heat exchanger according to a second exemplary embodiment of the present invention.

10 is a perspective view illustrating a refrigerant flow structure of a stacked heat exchanger according to Embodiment 3 of the present invention.

11 is a perspective view showing a refrigerant flow structure of a stacked heat exchanger according to Embodiment 4 of the present invention.

<Explanation of symbols for the main parts of the drawings>

1: flat tube, 2: plate,

2C: center plate, 2L: leftmost furnace tank plate,

2LC: left center plate, 2R: rightmost furnace tank plate,

2RC: right center plate, 3: heat transfer fins,

5: support block, 21: first heat exchanger,

22: second heat exchanger, 23, 25: compartment rib,

24: embossed bead, 24H: high embossed bead,

24L: low embossed bead, 26: brazing flange,

41: first end plate, 42: second end plate,

43, 51: refrigerant inflow passage, 44, 52: refrigerant discharge passage,

45: internal flow path, 211: first hole cup,

222: the second hole cup, 223: the third hole cup,

224: fourth hole cup, 225: fifth hole cup,

411: refrigerant inlet, 412: refrigerant outlet,

H1: height of brazing flange, H2: height of compartment rib,

H3: height of embossed bead 24H, H4: height of embossed bead 24L

In order to achieve the above object, the multilayer heat exchanger according to the first embodiment of the present invention, a plurality of flat tubes and a plurality of heat transfer fins are laminated alternately, the first end plate is bonded to the leftmost plate and In addition, in the stacked heat exchanger in which the second end plate is stacked on the rightmost plate,

Each plate is partitioned into a first heat exchanger at the top and a second heat exchanger at the bottom thereof, a first hole cup is formed at the first heat exchanger, and a second hole cup and a third hole cup are formed at the bottom of the second heat exchanger. And a fourth hole cup and a fifth hole cup are formed at the upper end of the second heat exchanger in front and rear, and a partition rib is formed between the fourth hole cup and the fifth hole cup between the second hole cup and the third hole cup;

The leftmost plate of the plates is a furnace tank plate, the second hole cup and the third hole cup communicate with the refrigerant inlet of the first end plate, and the first hole cup communicates with the refrigerant outlet of the first end plate. The 4 hole cup and the 5 hole cup are blocked;

Among the plates, the rightmost plate is the furnace tank plate, and the fourth hole cup and the fifth hole cup are blocked, and the second hole cup and the third hole cup are connected to each other through the inner flow path of the second end plate. In communication with a hole cup;

Among the plates, the second hole cup and the third hole cup of the center plate are closed.

In addition, a support block having a coolant inlet and a coolant outlet may be installed on an outer surface of the first end plate, and the coolant inlet channel and the coolant outlet channel of the support block may be connected to the coolant inlet port and the coolant outlet port of the first end plate. Connected through.

In addition, in the present invention, the plates are formed relatively thin in order to make the heat exchanger compact, and if the plates are formed thin in this way, the passage resistance of the refrigerant increases, but the inner surface of the second heat exchange part of each plate constituting the flat tube has a large number. The embossed beads of are formed in a predetermined arrangement, and some of the embossed beads have a height higher than that of other embossed beads to solve the passage resistance problem of the refrigerant. That is, when two plates are joined to each other to form a flat tube, embossed beads having a large height corresponding to each other are bonded to each other, and embossed beads having a small height corresponding to each other are not bonded to each other. As a result, the passage area of the refrigerant is increased, and the turbulence of the refrigerant can be promoted.

In addition, the refrigerant inlet flow path formed by the first end plate and the leftmost furnace tank plate is preferably configured to equally divide and flow the refrigerant into the second and third hole cups of the leftmost furnace tank plate.

According to the laminated heat exchanger according to the present invention configured as described above, when the refrigerant flows between the first end plate and the leftmost furnace tank plate through the expansion valve, the refrigerant inlet flow path of the support block and the refrigerant inlet of the first end plate. The refrigerant flows toward the center plate through the second and third hole cups of the plates up to the leftmost furnace tank plate and the center plate, and at the same time, the second hole cups up to the leftmost furnace tank plate and the center plate and The refrigerant introduced into the three-hole cups rises upward through the second heat exchanger and flows toward the fourth and fifth hole cups of the plates up to the leftmost furnace tank plate and the central plate. The refrigerant flowing therein flows through the fourth hole cup and the fifth hole cup of the center plate toward the fourth hole cups and the fifth hole cups of the plates up to the rightmost furnace tank plate. Since the fourth and fifth hole cups of the tank plate are blocked, they are lowered down through the second heat exchanger and flow toward the second and third hole cups up to the center plate and the rightmost furnace tank plate, and then the rightmost furnace tank plate. The first hole cup of the rightmost furnace tank plate is introduced into the first hole cup of the rightmost furnace tank plate through the inner flow path formed by the rightmost furnace tank plate and the second end plate through the second hole cup and the third hole cup of the It flows straight to the left toward the first hole cup of the leftmost furnace tank plate. The refrigerant flowing toward the first hole cup of the leftmost furnace tank plate is discharged through the refrigerant discharge port of the first end plate, the refrigerant discharge passage of the support block, and the expansion valve.

In addition, in the stacked heat exchanger according to the second embodiment of the present invention, a plurality of flat tubes and a plurality of heat transfer fins in which two plates are joined are alternately stacked, and a left end furnace tank plate is joined to a first end plate and the rightmost side. In the stack type heat exchanger in which a second end plate is stacked on the furnace tank plate, the plate is partitioned into a first heat exchange part at an upper end and a second heat exchange part at a lower part thereof, and a first hole cup is formed at the first heat exchange part. A second hole cup and a third hole cup are formed at the lower end of the second heat exchange part before and after, and a fourth hole cup and a fifth hole cup are formed at the upper end of the second heat exchange part before and after the fourth hole cup and between the second hole cup and the third hole cup. And partition ribs are formed between the fifth hole cups; The second hole cup and the third hole cup of the leftmost furnace tank plate of the plates communicate with the refrigerant inlet of the first end plate, and the first hole cup of the leftmost furnace tank plate communicate with the refrigerant outlet of the first end plate. The fourth and fifth hole cups of the leftmost furnace tank plate are blocked; The second hole cup and the third hole cup of the rightmost furnace tank plate of the plates are blocked, and the fourth hole cup and the fifth hole cup of the rightmost furnace tank plate are connected to each other by the inner channel of the second end plate. Communicating with the first hole cup; The second hole cup and the third hole cup of the left center plate of the plates are blocked; Among the plates, the fourth hole cup and the fifth hole cup of the right center plate are blocked.

In addition, in the stacked heat exchanger according to the third embodiment of the present invention, a plurality of flat tubes in which two plates are joined and a plurality of heat transfer fins are alternately stacked, and a first end plate is joined to the leftmost furnace tank plate, and the rightmost side. In the stack type heat exchanger in which a second end plate is stacked on the furnace tank plate, the plate is partitioned into a first heat exchange part at an upper end and a second heat exchange part at a lower part thereof, and a first hole cup is formed at the first heat exchange part. A second hole cup and a third hole cup are formed at the lower end of the second heat exchange part before and after, and a fourth hole cup and a fifth hole cup are formed at the upper end of the second heat exchange part before and after the fourth hole cup and between the second hole cup and the third hole cup. And partition ribs are formed between the fifth hole cups; The second hole cup and the third hole cup of the leftmost furnace tank plate of the plates communicate with the refrigerant inlet of the first end plate, and the first hole cup of the leftmost furnace tank plate communicate with the refrigerant outlet of the first end plate. The fourth and fifth hole cups of the leftmost furnace tank plate are blocked; The fourth and fifth hole cups of the rightmost furnace tank plate of the plates are clogged, and the second and third hole cups of the rightmost furnace tank plate are connected to each other by the inner channel of the second end plate. Communicating with the first hole cup; The third hole cup of the left center plate of the plates is blocked; Among the plates, the second hole cup of the right middle plate is blocked.

In addition, in the stacked heat exchanger according to the fourth embodiment of the present invention, a plurality of flat tubes and a plurality of heat transfer fins in which two plates are joined are alternately stacked, and a first end plate is joined to the leftmost furnace tank plate and the rightmost side. In the stack type heat exchanger in which a second end plate is stacked on the furnace tank plate, the plate is partitioned into a first heat exchange part at an upper end and a second heat exchange part at a lower part thereof, and a first hole cup is formed at the first heat exchange part. A second hole cup is formed at a lower end of the second heat exchange part, and a third hole cup is formed at an upper end of the second heat exchange part; The second hole cup of the leftmost furnace tank plate of the plates communicates with the refrigerant inlet of the first end plate, and the first hole cup of the leftmost furnace tank plate communicates with the refrigerant outlet of the first end plate and the leftmost furnace tank. The third hole cup of the plate is blocked; The second hole cup of the rightmost furnace tank plate of the plates is clogged and the third hole cup of the rightmost furnace tank plate communicates with the first hole cup of the rightmost furnace tank plate through the inner flow path of the second end plate; The second hole cup of the left center plate of the plates is blocked; Among the plates, the third hole cup of the right center plate is blocked.

Other features and advantages of the present invention will become more apparent from the following detailed description of the preferred embodiments based on the accompanying drawings.

<Example 1>

A multilayer heat exchanger according to Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 8.

The laminated heat exchanger according to the first embodiment includes a plurality of flat tubes 1 and a plurality of heat transfer fins 3 to which two plates 2 and 2 are joined, as shown in FIGS. 1 to 5, 7 and 8. ) Are alternately stacked, the first end plate 41 is joined to the outer surface of the leftmost plate (denoted by reference 2L to distinguish it from the other plate), and the rightmost plate (reference 2R to distinguish it from the other plate). The second end plate 42 is laminated on the outer surface of the panel.

7 and 8, the first end plate 41 is provided with a coolant inlet 411 and a coolant outlet 412, and a support block is formed on an outer surface of the first end plate 41. 5) is installed.

As shown in FIGS. 7 and 8, the support block 5 has a refrigerant inlet 51 and a refrigerant outlet of the first end plate 41 communicating with the refrigerant inlet 411 of the first end plate 41. It is preferable to have a refrigerant discharge passage 52 communicating with 412 and to directly connect an expansion valve, a refrigerant pipe, or the like to the refrigerant inlet passage 51 and the refrigerant discharge passage 52.

As shown in FIG. 1, the plate 2 is partitioned by a partition rib 25 into a first heat exchange part 21 at an upper end and a second heat exchange part 22 below it, and a first heat exchange part 21. ) And the second heat exchange part 22 are formed to be recessed, and the inner surfaces of the first heat exchange part 21 and the second heat exchange part 22 are partitioned so as not to communicate with each other.

In addition, a first hole cup 211 is formed at the first heat exchange part 21, and a second hole cup 222 and a third hole cup 223 are formed at the lower end of the second heat exchange part 22 before and after. The fourth hole cup 224 and the fifth hole cup 225 are formed at the upper end of the second heat exchange part 22 before and after. The second heat exchange part 22 is partitioned back and forth by a partition rib 23 formed vertically in the center. That is, the partition rib 23 is formed from between the second hole cup 222 and the third hole cup 223 to between the fourth hole cup 224 and the fifth hole cup 225, and thus the second hole cup 222 and the fourth hole cup. 224 is blocked so as not to communicate with the third hole cup 223 and the fifth hole cup 225.

2 and 5, the brazing flange 26 is formed at a predetermined height H1 around the plate 2. It is preferable that the height of the brazing flange 26 and the height H2 of the partition ribs 23 are the same.

When the two plates 2 and 2 formed as described above are joined to each other, the brazing flanges 26 and 26 corresponding to each other of the two plates 2 and 2 and the partition ribs 23 corresponding to each other of the two plates 2 and 2 are formed. 23 and the edges of the hole cups corresponding to each other of the two plates 2 and 2 are joined to each other to form a flat tube 1 having a predetermined flow path therein. Therefore, two straight flow paths are formed inside and behind each flat tube 1, that is, between the second heat exchange parts 22 of the two plates 2 and 2 joined to each other, and the respective plates 2 correspond to each other. The hole cups are connected to each other to allow the refrigerant to flow. As such, when the straight channel is adopted, the path length of the refrigerant may be reduced as compared with the U-turn channel which is conventionally employed.

Then, a plurality of embossing beads 24 are formed in a predetermined arrangement on the inner surface of the second heat exchange part 22 of each plate 2. According to Embodiment 1, the embossed beads 24H formed at a predetermined position among the embossed beads 24 are higher than the other embossed beads 24L and have the same height as the brazing flange 26 or the partition rib 23. Thus, when the two plates 2 and 2 are joined, the embossed beads 24H and 24H having a high height H3 corresponding to each other are bonded to each other but the embossed beads 24L and 24L having a low height H4 corresponding to each other. Since they are not bonded to each other, not only the passage area of the refrigerant of the flat tube 1 is increased by the embossed beads 24L and 24L having a low height, but also the vortex phenomenon of the refrigerant is promoted, thereby improving the heat transfer property of the refrigerant. Can be.

For example, the height H2 of the partition rib 23, the height H1 of the brazing flange 26, and the height H3 of the embossing bead 24H are in the range of 3.0 to 3.5 mm, respectively, and the height of the embossing bead 24L. (H4) is preferably in the range of 2.0 to 2.5 mm, which is 1/3 to 1/2 of the height H3.

The arrangement and pitch of the embossed beads 24 are determined by the heat capacity Hc according to Equation 1 below and the refrigerant-side passage resistance according to Equation 2 ) Can be set appropriately.

Where K is the thermal conductivity,

ego, Is the average temperature difference between the air and the refrigerant, A is the total heat transfer area on the air side, Ar is the total heat transfer area on the refrigerant side, Is the efficiency of the fin, hair is the heat transfer rate in the air side, Href is the heat transfer rate in the refrigerant side, Htube is the heat transfer rate in the tube side, and t is the thickness of the plate.

here, Is the friction loss factor, Is the refrigerant density, Dh is the plate refrigerant flow hydraulic diameter, L is the plate refrigerant flow length, and v is the refrigerant average flow rate.

In addition, according to the first embodiment, the passage area of the first hole cup 211 is preferably larger than the passage area of the second hole cup 222 or the third hole cup 223. To this end, when the first hole cup 211 is formed to occupy most of the area of the first heat exchanger 21 so as to maximize the front and rear width of the plate 2, the passage area and the refrigerant of the first hole cup 211 Not only can the heat transfer area be maximized, but the size of the heat exchanger can also be made compact.

On the other hand, the leftmost plate 2L is a no tank plate in which no cup is formed, and the fourth hole cup 224 and the fifth hole cup 225 are blocked, and the leftmost furnace tank plate. The first hole cup 211 of 2L has a refrigerant discharge port 44 of the first end plate 41 through a refrigerant discharge passage 44 formed by the first end plate 41 and the leftmost furnace tank plate 2L. 412, and the second hole cup 222 and the third hole cup 223 of the leftmost furnace tank plate 2L are formed by the leftmost furnace tank plate 2L and the first end plate 41. Through the refrigerant inlet flow passage 43 to communicate with the refrigerant inlet 411 of the first end plate 41.

Therefore, the refrigerant flowing through the refrigerant inlet flow passage 51 of the support block 5 is the refrigerant inlet 411 and the first end plate 41 and the leftmost furnace tank plate 2L of the first end plate 41. Through the coolant flow path 43 formed by the inlet into the second hole cup 222 and the third hole cup 223 of the leftmost furnace tank plate (2L) can flow toward each plate (2). In addition, the refrigerant discharged through the first hole cup 211 of the leftmost furnace tank plate 2L may include a refrigerant discharge passage 44 formed by the first end plate 41 and the leftmost furnace tank plate 2L. Through the refrigerant discharge port 412 of the first end plate 41 may be discharged toward the refrigerant discharge passage 52 of the support block (5).

In addition, the refrigerant inflow passage 43 formed by the first end plate 41 and the leftmost furnace tank plate 2L includes a second hole cup 222 and a third hole cup 223 of the leftmost furnace tank plate 2L. It is preferable that the refrigerant is divided into two parts so that the flow can be divided evenly.

Further, according to Embodiment 1, the rightmost plate 2R of the plates 2 is a furnace tank play, and the fourth hole cup 224 and the fifth hole cup 225 are blocked, and the rightmost furnace tank plate. The second hole cup 222 and the third hole cup 223 of 2R are connected to the rightmost furnace tank plate through an inner flow passage 45 formed by the rightmost furnace tank plate 2R and the second end plate 42. It communicates with the 1st hole cup 211 of 2R.

Among the plates 2, the second hole cup 222 and the third hole cup 223 of the center plate 2C are blocked.

Next, the operation of the stacked heat exchanger according to the first embodiment of the present invention will be described.

Refrigerant inlet flow path between the first end plate 41 and the leftmost furnace tank plate 2L through the refrigerant inlet flow path 51 of the support block 5 and the refrigerant inlet 411 of the first end plate 41. When the refrigerant flows into the 43, the refrigerant is formed in the leftmost furnace tank plate 2L since the second hole cup 222 and the third hole cup 223 of the leftmost furnace tank plate 2L are opened. It is introduced into the two hole cup 222 and the third hole cup 223. At this time, the refrigerant introduced through the support block 5 has the second hole cup (2) because the refrigerant inflow passage 43 formed by the first end plate 41 and the leftmost furnace tank plate 2L has a bipartition structure. 222 and the third hole cup 223 is divided evenly and flows.

As shown in FIG. 6 introduced into the second hole cup 222 and the third hole cup 223 of the leftmost furnace tank plate 2L, the refrigerant is formed in the second hole cup 222 and the third hole of the center plate 2C. Since the hole cup 223 is blocked, the second hole cups 222 and the third hole cups 223 of the left half plates (that is, the plates between the leftmost furnace tank plate 2L and the center plate 2C) are removed. The refrigerant flows toward the center plate 2C, and the refrigerant flowing in this way rises upward through the second heat exchange part 22 of the left half plates to form the fourth hole cups 224 and the fifth hole cups of the left half plates ( 225). In addition, the coolant thus flows is blocked by the fourth hole cup 224 and the fifth hole cup 225 of the leftmost furnace tank plate 2L, and the fourth hole cup 224 and the fifth hole cup of the center plate 2C. Since the 225 is open, the right half plates (that is, the center plate 2C and the rightmost furnace tank plate 2R) through the fourth hole cup 224 and the fifth hole cup 225 of the center plate 2C. Flows toward the fourth hole cups 224 and the fifth hole cups 225 of the plates), and the coolant flowed in the fourth hole cups 224 and the fifth hole cups of the rightmost furnace tank plate 2R. Since 225 is blocked, it descends through the second heat exchange part 22 of the right half plates and flows toward the second hole cups 222 and the third hole cups 223 of the right half plates. The refrigerant flowing in this way is blocked by the second hole cup 222 and the third hole cup 223 of the center plate 2C, while the second hole cup 222 and the third hole cup (the rightmost furnace tank plate 2R) are blocked. Since the 223 is open, it flows toward the second hole cup 222 and the third hole cup 223 of the rightmost furnace tank plate 2R, through which the rightmost furnace tank plate 2R and the second end plate 42 are located. It flows into the 1st hole cup 211 of the rightmost furnace tank plate 2R through the internal flow path 45 formed by it. Since the first hole cup 211 of the rightmost furnace tank plate 2R and the first hole cup 211 of the leftmost furnace tank plate 2L communicate with each other in a straight line, the rightmost furnace tank plate 2R The refrigerant introduced into the one-hole cup 211 flows directly toward the first hole cup 211 of the leftmost furnace tank plate 2L and is formed by the leftmost furnace tank plate 2L and the first end plate 41. The refrigerant discharge passage 44 and the refrigerant discharge port 412 of the first end plate 41 may be discharged toward the refrigerant discharge passage 52 of the support block 5.

In Embodiment 1, the embossed beads 24 formed in the plates 2 in the refrigerant flow process as described above do not all have the same height, but the embossed beads 24H having the high height H3 and the low height H4. Since the flat tube 1 is formed by joining the two plates 2 and 2 to form the flat tube 1, the corresponding embossing beads 24H and 24H are bonded to each other but corresponding to each other. As the 24L and 24L are not bonded, the passage area of the refrigerant is increased to decrease the passage resistance of the refrigerant, as well as to promote turbulence of the refrigerant, thereby improving heat transfer properties.

<Example 2>

9, the laminated heat exchanger which concerns on Example 2 of this invention is demonstrated.

The stacked heat exchanger according to the second embodiment has the same construction and operation as the first embodiment except that only the refrigerant flow structure is different in the heat exchanger according to the first embodiment, and therefore the same parts as in the first embodiment have the same reference numerals. The detailed description thereof is omitted here.

According to Embodiment 2, the fourth hole cup 224 and the fifth hole cup 225 of the leftmost furnace tank plate 2L of the plates 2 are clogged, and the first hole cup of the leftmost furnace tank plate 2L. Reference numeral 211 communicates with the refrigerant discharge port 412 of the first end plate 41, and the second hole cup 222 and the third hole cup 223 of the leftmost furnace tank plate 2L are refrigerant inflow passages ( 43 is the same as that of the first embodiment through the refrigerant inlet 411 of the first end plate 41.

Unlike the first embodiment, the second hole cup 222 and the third hole cup 223 of the rightmost furnace tank plate 2R of the plates 2 are blocked. In addition, the fourth hole cup 224 and the fifth hole cup 225 of the rightmost furnace tank plate 2R are formed by the rightmost furnace tank plate 2R and the second end plate 42 as in the first embodiment. The inner channel 45 communicates with the first hole cup 211 of the rightmost furnace tank plate 2R.

The second hole cup 222 and the third hole cup 223 of the left center plate 2LC of the plates 2 are blocked, and the fourth hole cup 224 and the fifth hole cup of the right center plate 2RC are blocked. 225 is blocked.

Next, the operation of the stacked heat exchanger according to the second embodiment of the present invention will be described.

Refrigerant inlet flow path between the first end plate 41 and the leftmost furnace tank plate 2L through the refrigerant inlet flow path 51 of the support block 5 and the refrigerant inlet 411 of the first end plate 41. When the refrigerant flows into the 43, the refrigerant is formed in the leftmost furnace tank plate 2L since the second hole cup 222 and the third hole cup 223 of the leftmost furnace tank plate 2L are opened. The two hole cups 222 and the third hole cups 223 are equally divided and introduced.

As described above, the refrigerant introduced into the second hole cup 222 and the third hole cup 223 of the leftmost furnace tank plate 2L is formed by the second hole cup 222 and the third hole cup 223 of the left center plate 2LC. Since it is blocked, the left center plate (through the second hole cups 222 and the third hole cups 223 of the left side plates (ie, the plates between the leftmost furnace tank plate 2L and the left center plate 2LC)) 2LC), and the refrigerant flows upward through the second heat exchange part 22 of the left side plates and flows toward the fourth hole cups 224 and the fifth hole cups 225 of the left side plates. . In addition, the coolant thus flows is blocked by the fourth hole cup 224 and the fifth hole cup 225 of the leftmost furnace tank plate 2L, and the fourth hole cup 224 and the fifth hole of the left center plate 2LC. Since the hole cup 225 is open, the middle plates (that is, the left center plate 2LC and the right center plate 2RC) through the fourth hole cup 224 and the fifth hole cup 225 of the left center plate 2LC. Between the fourth hole cups 224 and the fifth hole cups 225 of the plates), and the coolant flowed in the fourth hole cup 224 and the fifth hole cups 225 of the right center plate 2RC. ) Is lowered through the second heat exchanger 22 of the central plates and flows toward the second hole cups 222 and the third hole cups 223 of the central plates. The refrigerant flowing in this way is blocked in the second hole cup 222 and the third hole cup 223 of the left center plate 2LC, and the second hole cup 222 and the third hole cup 223 of the right center plate 2RC. ) Is open, the right side plates (ie, right middle plate 2RC and rightmost furnace tank plate 2R) through the second hole cup 222 and the third hole cup 223 of the right center plate 2RC. In between the second hole cups 222 and the third hole cups 223. The refrigerant flowing in this way is raised upward through the second heat exchange part 22 of the right side plates because the second hole cup 222 and the third hole cup 223 of the rightmost furnace tank plate 2R are blocked. After flowing toward the fourth hole cups 224 and the fifth hole cups 225 of the plates, the fourth hole cup 224 and the fifth hole cup 225 of the right center plate 2RC are blocked and the rightmost furnace tank Since the fourth hole cup 224 and the fifth hole cup 225 of the plate 2R are open, they flow toward the fourth hole cup 224 and the fifth hole cup 225 of the rightmost furnace tank plate 2R, and thus the rightmost side. It flows into the 1st hole cup 211 of the rightmost furnace tank plate 2R through the internal flow path 45 formed by the furnace tank plate 2R and the 2nd end plate 42. As shown in FIG. And since the 1st hole cup 211 of the rightmost furnace tank plate 2R to the 1st hole cup 211 of the leftmost furnace tank plate 2L is mutually connected linearly, the rightmost furnace tank plate 2R Refrigerant flowed into the first hole cup 211 of the second flows directly toward the first hole cup 211 of the leftmost furnace tank plate (2L) and then by the leftmost furnace tank plate (2L) and the first end plate (41) The refrigerant discharge passage 44 and the refrigerant discharge port 412 of the first end plate 41 may be discharged toward the refrigerant discharge passage 52 of the support block 5.

<Example 3>

Referring to Fig. 10, a stacked heat exchanger according to a third embodiment of the present invention will be described.

The stacked heat exchanger according to the third embodiment has the same construction and operation as the second embodiment except that only the refrigerant flow structure is different in the heat exchanger according to the second embodiment. The detailed description thereof is omitted here.

According to the third embodiment, the second hole cup 222 and the third hole cup 223 of the leftmost furnace tank plate 2L communicate with the refrigerant inlet of the first end plate 41 and also the leftmost furnace tank plate 2L. The first hole cup 211 of) is communicated with the refrigerant outlet of the first end plate 41, and the fourth hole cup 224 and the fifth hole cup 225 of the leftmost furnace tank plate 2L are blocked. The fourth hole cup 224 and the fifth hole cup 225 of the rightmost furnace tank plate 2R are clogged and the second hole cup 222 and the third hole cup 223 of the rightmost furnace tank plate 2R. Is communicated with the first hole cup 211 of the rightmost furnace tank plate 2R via the inner flow passage 45 formed by the rightmost furnace tank plate 2R and the second end plate 42. In addition, the third hole cup 223 of the left center plate 2LC is blocked, and the second hole cup 222 of the right center plate 2RC is blocked.

Next, the operation of the stacked heat exchanger according to the third embodiment of the present invention will be described.

Refrigerant inlet formed by the first end plate 41 and the leftmost furnace tank plate 2L via the refrigerant inlet passage 51 of the support block 5 and the refrigerant inlet 411 of the first end plate 41. When the coolant flows into the flow path 43, the coolant is opened in the leftmost furnace tank plate 2L since the second hole cup 222 and the third hole cup 223 of the leftmost furnace tank plate 2L are opened. The second hole cup 222 and the third hole cup 223 are divided into evenly introduced.

In this way, the refrigerant introduced into the second hole cup 222 of the leftmost furnace tank plate 2L among the refrigerant introduced into the second hole cup 222 and the third hole cup 223 of the leftmost furnace tank plate 2L is left. Since the second hole cup 222 of the center plate 2LC is open, it flows through the second hole cup 222 of the left center plate 2LC to the second hole cups 222 of the center plates and at the same time It rises upward through the second heat exchange part 22 and flows toward the fourth hole cups 224 of the left side plates. In addition, the refrigerant flowing toward the second hole cups 222 of the center plates rises upward through the second heat exchange part 22 of the center plates because the second hole cup 222 of the right center plate 2RC is blocked. The refrigerant that flows toward the fourth hole cups 224 of the plates and flows toward the fourth hole cups 224 of the left side plate is connected to the fourth hole cup 224 of the left center plate 2LC because the refrigerant flows therethrough. Flow toward the fourth hole cups 224 of the central plate is combined with the refrigerant above. Since the fourth hole cup 224 of the right center plate 2RC is open, the refrigerant flows through the fourth hole cups 224 of the right side plates, and then the first rightmost tank plate 2R Since the four-hole cup 224 is blocked, it is lowered down through the second heat exchanger 22 of the right side plates and flows toward the second hole cups 222 of the right side plates. The refrigerant flowing in this way is blocked because the second hole cup 222 of the right center plate 2RC is blocked and the second hole cup 222 of the rightmost furnace tank plate 2R is opened. It is discharged to the internal flow path 45 formed by 2R and the second end plate 42.

Meanwhile, the refrigerant flowing into the third hole cup 223 of the leftmost furnace tank plate 2L among the refrigerant flowing into the second hole cup 222 and the third hole cup 223 of the leftmost furnace tank plate 2L is left. Since the third hole cup 223 of the center plate 2LC is clogged, it flows up to the third hole cup 223 of the left center plate 2LC and upwards from this region through the second heat exchange part 22 of the left side plates. It rises and flows toward the fifth hole cups 225 of the left side plates. The refrigerant flowing toward the fifth hole cups 225 is blocked by the fifth hole cup 225 of the leftmost furnace tank plate 2L and the fifth hole cup 225 of the left center plate 2LC is opened. Since it flows toward the fifth hole cups 225 of the central plate through this, and the refrigerant flowed in this way, the fifth hole cup 225 of the right side plates through the fifth hole cup 225 of the right center plate 2RC is opened. At the same time as the flow toward the (225) and descends through the second heat exchange portion 22 of the central plate flows toward the third hole cups (223) of the central plate. In addition, the coolant flowing toward the fifth hole cups 225 of the right side plates passes through the second heat exchange part 22 of the right side plates because the fifth hole cup 225 of the rightmost furnace tank plate 2R is blocked. The coolant that flows downward toward the third hole cups 223 of the right side plates and flows toward the third hole cups 223 of the middle plates is blocked while the third hole cup 223 of the left center plate 2LC is blocked. Since the third hole cup 223 of the right middle plate 2RC is open, it flows toward the third hole cups 223 of the right side plates and merges with the refrigerant. The refrigerant flowing in this way is formed by the uppermost furnace tank plate 2R and the second end plate 42 through the third hole cup 223 of the uppermost furnace tank plate 2R. Discharged into the inner passage 45 and introduced into the second hole cup 222 of the first rightmost furnace tank plate 2R and formed by the rightmost furnace tank plate 2R and the second end plate 42 as described above. It is combined with the refrigerant discharged into the inner passage 45. The refrigerant flowing in this way flows into the first hole cup 211 of the rightmost furnace tank plate 2R again and flows in a straight line from there to the first hole cup 211 of the leftmost furnace tank plate 2L. Refrigerant discharge of the support block 5 via the refrigerant discharge passage 44 formed by the leftmost furnace tank plate 2L and the first end plate 41 and the refrigerant discharge port 412 of the first end plate 41. It may be discharged toward the flow path 52.

That is, in the stack type heat exchanger according to the third embodiment, the flow path of the refrigerant flows into two paths and finally discharges together.

<Example 4>

With reference to FIG. 11, the laminated heat exchanger which concerns on Example 4 of this invention is demonstrated.

In the stacked heat exchanger according to the fourth embodiment, a plurality of flat tubes 1 and a plurality of heat transfer fins 3 to which two plates 2 and 2 are joined are alternately stacked, and the leftmost furnace tank plate 2L has a first The end plate 41 is joined, and the second end plate 42 is stacked on the rightmost furnace tank plate 2R.

Each plate 2 is divided into a first heat exchanger 21 at the top and a second heat exchanger 22 at the bottom thereof, and a first hole cup 211 is formed at the first heat exchanger 21. A second hole cup 222 is formed at a lower end of the second heat exchange part 22, and a third hole cup 223 is formed at an upper end of the second heat exchange part 22.

The second hole cup 222 of the leftmost furnace tank plate 2L of the plates 2 communicates with the refrigerant inlet 411 of the first end plate 41 and also the leftmost furnace tank plate 2L. The first hole cup 211 communicates with the refrigerant discharge port 412 of the first end plate 41, and the third hole cup 223 of the leftmost furnace tank plate 2L is blocked. In addition, the second hole cup 222 of the rightmost furnace tank plate 2R of the plates 2 is blocked and the third hole cup 223 of the rightmost furnace tank plate 2R is the rightmost furnace tank plate 2R. ) And the first hole cup 211 of the rightmost furnace tank plate 2R through the inner flow passage 45 formed by the second end plate 42. The second hole cup 222 of the left center plate 2LC of the plates 2 is blocked, and the third hole cup 223 of the right center plate 2RC of the plates 2 is blocked.

Next, the operation of the stacked heat exchanger according to the fourth embodiment of the present invention will be described.

Refrigerant inlet formed by the first end plate 41 and the leftmost furnace tank plate 2L via the refrigerant inlet passage 51 of the support block 5 and the refrigerant inlet 411 of the first end plate 41. When the refrigerant flows into the flow path 43, the refrigerant flows into the second hole cup 222 of the leftmost furnace tank plate 2L since the second hole cup 222 of the leftmost furnace tank plate 2L is opened. Only inflow. The refrigerant flowing in this way rises upward through the second heat exchange part 22 of the left side plates and flows into the third hole cups 223 of the left side plates because the second hole cup 222 of the left center plate 2LC is blocked. do. Since the third hole cup 223 of the leftmost furnace tank plate 2L is blocked and the third hole cup 223 of the left center plate 2LC is opened, the refrigerant is formed through the third hole cup of the central plates. 223 flows toward the 223 and then descends through the second heat exchangers 22 of the central plates because the third hole cup 223 of the right middle plate 2RC is blocked, thereby lowering the second hole cups 222 of the central plates. Flow to the side. The refrigerant flowed in this way is because the second hole cup 222 of the left center plate 2LC is blocked, while the second hole cup 222 of the right center plate 2RC is open. Flowing toward the two hole cups 222, the refrigerant rises through the second heat exchangers 22 of the right side plates because the second hole cup 222 of the rightmost furnace tank plate 2R is blocked and the right side plate Flow toward the third hole cups 223. The refrigerant flowing in this way is closed because the third hole cup 223 of the right center plate 2RC is blocked, while the third hole cup 223 of the rightmost furnace tank plate 2R is open, and thus the rightmost furnace tank. The inner channel 45 formed by the plate 2R and the second end plate 42 is discharged into the first hole cup 211 of the rightmost furnace tank plate 2R. The refrigerant flowing into the first hole cup 211 of the rightmost furnace tank plate 2R flows in a straight line from here to the first hole cup 211 of the leftmost furnace tank plate 2L, and finally the leftmost furnace tank. The refrigerant discharge passage 52 of the support block 5 through the refrigerant discharge passage 44 formed by the plate 2L and the first end plate 41 and the refrigerant discharge port 412 of the first end plate 41. To the side.

In the stacked heat exchanger according to the present invention configured as described above, since the refrigerant does not flow in the U-turn in the plate, the refrigerant flow path is short, and the refrigerant flow resistance is reduced, thereby making the refrigerant flow distribution even and the first heat exchange part 21 and Since the second heat exchanger 22 is isolated, the heat exchange between the refrigerant of the initial inflow and the refrigerant before being discharged is blocked, and the initial evaporation effect of the refrigerant is excellent, so the heat exchange efficiency is excellent.

In addition, because the height of the beads 24 of the plate 2 is partially differentiated, some of the beads 24, 24 corresponding to each other of the two plates 2, 2 at the time of joining the two plates 2, 2 Since the remaining beads 24 and 24 are brazed and not brazed, the flow path area of the coolant is increased while the turbulence acceleration of the coolant is maintained due to the step height of the bead 24.

In addition, since the refrigerant is discharged in a straight line through the first heat exchange part 21, the discharge resistance of the refrigerant can be reduced.

In addition, the passage area of the first hole cup 211 can be made larger than the passage area of the second hole cup 222 or the third hole cup 223, so that the height of the second heat exchange part 22 can be lowered and Since the passage resistance is reduced, the heat exchanger can be made compact.

In addition, the refrigerant inlet 411 and the refrigerant outlet 412 of the first end plate 41 may be directly connected to the refrigerant inlet 51 and the refrigerant outlet 52 of the support block 5 as well as the support block. Since the expansion valve or the refrigerant pipe can be directly connected to (5), not only the component can be reduced but also the assembly is simple and the productivity can be improved.

Claims (8)

A plurality of flat tubes (1) and a plurality of heat transfer fins (3) in which two plates (2, 2) are joined are alternately stacked, and the first end plate (41) is joined to the leftmost plate (2L), In the stacked heat exchanger in which the second end plate 42 is stacked on the right plate 2R, Each plate is partitioned by a partition rib 25 into a first heat exchange part 21 at an upper end and a second heat exchange part 22 at a lower part thereof, and a brazing flange 26 is formed along an edge thereof. A first hole cup 211 is formed in the heat exchange part 21, and a second hole cup 222 and a third hole cup 223 are formed at the lower end of the second heat exchange part 22 before and after the second heat exchange part. A fourth hole cup 224 and a fifth hole cup 225 are formed at the upper end of the upper and lower sides of the 22, and between the second hole cup 222 and the third hole cup 223, the fourth hole cup 224 and the fifth hole cup. Compartment ribs 23 are formed between 225; The leftmost plate 2L of the plates is the furnace tank play, and the second hole cup 222 and the third hole cup 223 are formed by the leftmost furnace tank plate 2L and the first end plate 41. The first inlet cup 211 of the leftmost furnace tank plate 2L communicates with the refrigerant inlet 411 of the first end plate 41 through the refrigerant inlet passage 43, and the leftmost furnace tank plate 2L and The fourth hole cup 224 of the leftmost furnace tank plate 2L communicates with the refrigerant discharge port 412 of the first end plate 41 through the refrigerant discharge passage 44 formed by the first end plate 41. ) And the fifth hole cup 225 are blocked; Among the plates, the rightmost plate 2R is the furnace tank plate, and the fourth hole cup 224 and the fifth hole cup 225 are clogged and the second hole cup 222 and the first hole tank plate 2R of the rightmost furnace tank plate 2R. The three-hole cup 223 communicates with the first hole cup 211 of the uppermost furnace tank plate 2R through an inner flow passage 45 formed by the uppermost furnace tank plate 2R and the second end plate 42. To; Stacked heat exchanger, characterized in that the second hole cup (222) and the third hole cup (223) of the center plate (2C) of the plates are blocked. A plurality of flat tubes (1) and a plurality of heat transfer fins (3) in which two plates (2, 2) are joined are alternately stacked, and the first end plate (41) is joined to the leftmost plate (2L), In the stacked heat exchanger in which the second end plate 42 is stacked on the right plate 2R, The plate is partitioned by a partition rib 25 into a first heat exchange portion 21 at the top and a second heat exchange portion 22 at the bottom thereof, and a brazing flange 26 is formed along an edge thereof, and the first heat exchange is performed. A first hole cup 211 is formed in the part 21, and a second hole cup 222 and a third hole cup 223 are formed at the lower end of the second heat exchange part 22 before and after the second heat exchange part ( The fourth hole cup 224 and the fifth hole cup 225 are formed at the upper end of the upper and lower ends of the second hole 22 and between the second hole cup 222 and the third hole cup 223 and the fourth hole cup 224 and the fifth hole cup ( Compartment ribs 23 are formed between 225; Among the plates, the leftmost plate 2L is a furnace tank plate, and the second hole cup 222 and the third hole cup 223 are refrigerant formed by the first end plate 41 and the leftmost furnace tank plate 2L. The first hole cup 211 of the leftmost furnace tank plate 2L communicates with the refrigerant inlet 411 of the first end plate 41 through the inflow passage 43, and the leftmost furnace tank plate 2L The fourth hole cup 224 of the leftmost furnace tank plate 2L communicates with the refrigerant discharge port 412 of the first end plate 41 through the refrigerant discharge passage 44 formed by the one end plate 41. And the fifth hole cup 225 is blocked; Among the plates, the rightmost plate 2R is the furnace tank plate, and the second hole cup 222 and the third hole cup 223 are clogged and the fourth hole cup 224 and the first hole tank plate 2R of the rightmost furnace tank plate 2R. The 5-hole cup 225 communicates with the first hole cup 211 of the rightmost furnace tank plate 2R through an inner flow passage 45 formed by the second end plate 42 and the rightmost furnace tank plate 2R. To; Among the plates, the second hole cup 222 and the third hole cup 223 of the left center plate 2LC are blocked; Stacked heat exchanger, characterized in that the fourth hole cup (224) and the fifth hole cup (225) of the right middle plate (2RC) of the plates are blocked. A plurality of flat tubes (1) and a plurality of heat transfer fins (3) in which two plates (2, 2) are joined are alternately stacked, and the first end plate (41) is joined to the leftmost plate (2L), In the stacked heat exchanger in which the second end plate 42 is stacked on the right plate 2R, The plate is partitioned by a partition rib 25 into a first heat exchange portion 21 at the top and a second heat exchange portion 22 at the bottom thereof, and a brazing flange 26 is formed along an edge thereof, and the first heat exchange is performed. A first hole cup 211 is formed in the part 21, and a second hole cup 222 and a third hole cup 223 are formed at the lower end of the second heat exchange part 22 before and after the second heat exchange part ( The fourth hole cup 224 and the fifth hole cup 225 are formed at the upper end of the upper and lower ends of the second hole 22 and between the second hole cup 222 and the third hole cup 223 and the fourth hole cup 224 and the fifth hole cup ( Compartment ribs 23 are formed between 225; The leftmost plate 2L of the plates is a furnace tank plate, and the second hole cup 222 and the third hole cup 223 are formed by the first end plate 41 and the leftmost furnace tank plate 2L. The first inlet cup 211 of the leftmost furnace tank plate 2L communicates with the refrigerant inlet 411 of the first end plate 41 through the refrigerant inlet passage 43, and the leftmost furnace tank plate 2L The fourth hole cup 224 of the leftmost furnace tank plate 2L communicates with the refrigerant discharge port 412 of the first end plate 41 through the refrigerant discharge passage 44 formed by the first end plate 41. ) And the fifth hole cup 225 are blocked; Among the plates, the rightmost plate 2R is the furnace tank plate, and the fourth hole cup 224 and the fifth hole cup 225 are clogged and the second hole cup 222 and the first hole tank plate 2R of the rightmost furnace tank plate 2R. The three-hole cup 223 communicates with the first hole cup 211 of the uppermost furnace tank plate 2R through an inner flow passage 45 formed by the uppermost furnace tank plate 2R and the second end plate 42. To; The third hole cup 223 of the left center plate 2LC of the plates is blocked; Stacked heat exchanger, characterized in that the second hole cup (222) of the right center plate (2RC) of the plates are blocked. A plurality of flat tubes (1) and a plurality of heat transfer fins (3) in which two plates (2, 2) are joined are alternately stacked, and the first end plate (41) is joined to the leftmost plate (2L), In the stacked heat exchanger in which the second end plate 42 is stacked on the right plate 2R, The plate is partitioned into a first heat exchanger 21 at the top and a second heat exchanger 22 at the bottom thereof, and a brazing flange 26 is formed along an edge thereof, and the first heat exchanger 21 is provided with a first heat exchanger 21. A hole cup 211 is formed, a second hole cup 222 is formed at a lower end of the second heat exchange part 22, and a third hole cup 223 is formed at an upper end of the second heat exchange part 22; The leftmost plate 2L of the plates is a furnace tank plate, and the second hole cup 222 is a refrigerant inflow passage 43 formed by the first end plate 41 and the leftmost furnace tank plate 2L. Through the refrigerant inlet 411 of the first end plate 41 and the first hole cup 211 of the leftmost furnace tank plate (2L) is the leftmost furnace tank plate (2L) and the first end plate (41). A third hole cup 223 of the leftmost furnace tank plate 2L is clogged through the refrigerant discharge port 412 of the first end plate 41 through the refrigerant discharge passage 44 formed by Among the plates, the rightmost plate 2R is a furnace tank plate, and the second hole cup 222 is clogged, and the third hole cup 223 of the rightmost furnace tank plate 2R is connected to the rightmost furnace tank plate 2R. Communicating with the first hole cup 211 of the rightmost furnace tank plate 2R through an inner flow passage 45 formed by the second end plate 42; The second hole cup 222 of the left center plate 2LC of the plates is blocked; Stacked heat exchanger, characterized in that the third hole cup (223) of the right center plate (2RC) of the plates are blocked. The refrigerant inlet passage 43 according to any one of claims 1 to 3, wherein the refrigerant inlet passage 43 formed by the first end plate 41 and the leftmost furnace tank plate 2L is formed of the leftmost furnace tank plate 2L. Stacked heat exchanger, characterized in that the divided into the second hole cup (222) and the third hole cup (223) so that the refrigerant is divided into the flow uniformly. The support block (5) according to any one of claims 1 to 4, wherein a support block (5) having a coolant inflow channel (51) and a coolant discharge channel (52) is provided on an outer surface of the first end plate (41). The refrigerant inflow passage 51 and the refrigerant discharge passage 52 of the block 5 are sequentially connected to the refrigerant inlet 411 and the refrigerant outlet 412 of the first end plate 41. . 5. The second heat exchange portion (22) according to any one of claims 1 to 4, wherein a plurality of embossed beads (24) are formed in a predetermined arrangement and are suitable for a predetermined position among the embossed beads (24). The height H3 of the embossed beads 24H arranged so as to be equal to the height H1 of the brazing flange 26 and the height H2 of the partition ribs 23, as well as the heights of the other embossed beads 24L ( Higher than H4, the two embossed beads 24H, 24H of the two plates 2, 2 forming the flat tube 1 are joined together and the two plates 2,2 forming the flat tube 1, respectively. Stacking heat exchanger, characterized in that the corresponding embossing beads (24L, 24L) of each other) is not bonded to each other. (Single correction) The stack type heat exchanger according to claim 7, wherein the height (H4) of the embossed beads (24L) is in the range of 1/3 to 1/2 of the embossed beads (24H).