JP7456795B2 - Stacked Heat Exchanger - Google Patents

Description

The present invention relates to a laminated heat exchanger that is most suitable for use in internal combustion engines of automobiles, etc., and particularly relates to improving the assemblability of a laminated heat exchanger in which two cores are separated in the stacking direction by a partition plate.

The heat exchangers described in Patent Document 1 and Patent Document 2 below have a core made of a laminate of flat tubes, and the entire core is covered with a cover. A gas flow path through which gas flows is formed in each flat tube, and a refrigerant flow path is formed between the cover and the outer surface of each flat tube to perform heat exchange between the gas and the refrigerant.
In the heat exchangers described in Patent Document 1 and Patent Document 2, only the gas is reversed in a U-shaped tank, and the gas flow path is formed in two passes. On the other hand, the refrigerant flow path flows in one pass without making a U-turn.
If the refrigerant flow path is one pass, the pair of pipes that serve as the inlet and outlet of the refrigerant will be placed apart, and if the pair of pipes need to be placed close to each other, there is a drawback that it cannot accommodate that request. .

Japanese Patent Application Publication No. 2013-88010 Patent No. 6276054

In order to solve this drawback and further save space in the refrigerant flow reversal structure, the present inventor has devised the following stacked heat exchanger.
This laminated heat exchanger has a first core and a second core made of a laminate of flat tubes, and the space between the two cores is separated in the stacking direction of the flat tubes, and the flat part of the flat tubes is separated from the first core and the second core. Place the partition plates in parallel. With this partition plate placed between both cores, the entire outer circumferences of both cores are fitted with one casing. A refrigerant flow reversal structure is provided in a part between the partition plate and the inner surface of the casing, and the refrigerant flow path side is made into two passes.
With such a structure, it is possible to make two passes through both the gas flow path side and the refrigerant flow path side, and furthermore, it is possible to save space in the refrigerant flow reversal structure.
Note that this structure was devised by the present inventor in the process of creating the present invention, and is not a prior art.

However, in the laminated heat exchanger devised by the present inventor, a partition plate is arranged between the first core and the second core, and after the laminated heat exchanger is assembled, the partition plate is placed in an accurate position. The downside is that you can't be sure.
Furthermore, since the partition plate is a thin component, there is a risk of forgetting to install it.
SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a laminated heat exchanger that can reliably arrange partition plates at accurate positions and detect whether the partition plates have been forgotten to be installed.

The present invention according to claim 1 is such that the flat tube 1 is formed by a pair of opposing flat parts 1a and a pair of side parts 1b connecting the two flat parts 1a, and each flat part 1a is positioned in parallel. A large number of flat tubes 1 are stacked to form a core,
A casing is fitted along the outer periphery of the core, and a gas flow path is formed within each flat tube 1, and a refrigerant flow path is formed between the outer periphery of each flat tube 1 and the casing. In a heat exchanger where heat exchange is performed between a circulating gas and a refrigerant flowing in a refrigerant flow path,
A first core 2a and a second core 2b each made of a laminate of the flat tubes 1 are provided,
The first core 2a and the second core 2b are arranged in the stacking direction, and the flat part 1a located at the end of the first core 2a closer to the second core 2b and the second core 2b located closer to the first core 2a. A first refrigerant flow path is arranged parallel to the flat parts 1a between the flat parts 1a located at the ends, and is arranged between the flat parts 1a located at the ends of the first core 2a closer to the second core 2b. 6a, and a second refrigerant flow path 6b is formed between the flat portion 1a located at the end of the second core 2b closer to the first core 2a, and further, a second refrigerant flow path 6b is formed between each tube 1 of the first core 2a. A partition that separates a first refrigerant flow path 6a formed between the outer periphery and the casing 4 and a second refrigerant flow path 6b formed between the outer periphery of each tube 1 of the second core 2b and the casing 4. Provide board 3,
The casing 4 has the partition plate 3 located in the middle thereof, and the entire outer periphery of the cores 2a and 2b is fitted therein,
One end of the first gas flow path 5a of the first core 2a and one end of the second gas flow path 5b of the second core 2b are connected by a gas flow reversal member 7 that reverses the flow of the gas 17. and
A communication path 8 is provided to reverse the flow of the refrigerant 16 from the first refrigerant flow path 6a of the first core 2a to the second refrigerant flow path 6b of the second core 2b,
A locking claw 3d protruding toward the outer surface of the casing 4 is formed on the outer peripheral edge of the partition plate 3,
The casing 4 is formed with an engaging portion 4e that engages the locking claw 3d of the partition plate 3,
This is a laminated heat exchanger in which the tip of the locking claw 3d protrudes from the outer surface of the casing 4 when the locking claw 3d of the partition plate 3 is engaged with the engaging portion 4e of the casing 4.

The present invention according to claim 2 provides a stacked heat exchanger according to claim 1,
A pair of locking claws 3d are protruded from the edges in the width direction of the partition plate 3, and the pair of locking claws 3d arrange the gas flow reversing member 7 of the partition plate 3. This is a stacked heat exchanger formed on the side.

The present invention according to claim 3 is a stacked heat exchanger according to either claim 1 or claim 2, comprising:
The casing 4 is formed from a casing body 4a consisting of a bottom portion 4c and a pair of side walls 4d rising from the bottom portion 4c, and a lid body 4b fitted to the casing body 4a,
The engaging portion 4e is a laminated heat exchanger formed on the side wall portion 4d of the casing body 4a on the side where the gas flow reversing member 7 is disposed.

The present invention as set forth in claim 4 provides a stacked heat exchanger as set forth in claim 2 or claim 3,
The engagement portion 4 e is a slit 22 that is cut out to the end portion on the gas flow reversing member 7 side.
The locking claw 3d of the partition plate 3 is locked in the slit 22,
This is a stacked type heat exchanger in which the locking claws 3d are sandwiched between the casing 4 and the gas flow reversing member 7.

The present invention according to claim 5 is the stacked heat exchanger according to claim 4,
This is a laminated heat exchanger in which the locking claws 3d of the partition plate 3 are not coated with a brazing material.

The present invention according to claim 6 is the stacked heat exchanger according to claim 1,
The partition plate 3 has an edge 3c that does not come into contact with the inner surface of the casing 4 on a part of its outer periphery, and the communication path 8 is formed between the edge 3c and the casing 4. It is an exchanger.

The stacked heat exchanger described in claim 1 has a locking claw 3d formed on the outer peripheral edge of the partition plate 3, which protrudes toward the outer surface of the casing 4, and an engagement portion 4e formed on the casing 4 for engaging the locking claw 3d of the partition plate 3, and when the locking claw 3d of the partition plate 3 is engaged with the engagement portion 4e of the casing 4, the tip of the locking claw 3d protrudes from the outer surface of the casing 4.
Therefore, the partition plate 3 can be easily positioned, and it can be confirmed that the partition plate 3 is in the correct position.

In the laminated heat exchanger according to the second aspect, a pair of locking claws 3d are provided protruding from the edges in the width direction of the partition plate 3, and the pair of locking claws 3d control the gas flow of the partition plate 3. It is formed on the side where the reversing member 7 is placed.
By providing the locking claws 3d at such positions, it becomes easy to assemble the partition plate 3 to the laminated heat exchanger.

In the laminated heat exchanger according to claim 3, the casing 4 includes a casing body 4a consisting of a bottom portion 4c and a pair of side walls 4d rising from the bottom portion 4c, and a lid body 4b fitted to the casing body 4a. The engaging portion 4e is formed on the side wall portion 4d of the casing body 4a on the side where the gas flow reversing member 7 is disposed.
With this configuration, the side wall portion 4d to which the locking claw 3d of the partition plate 3 of the casing body 4a is locked is pressed by the rising portion of the lid body 4b, so that the locking claw 3d of the partition plate 3 and the casing 4 are held together. The assembly with the engaging portion 4e becomes strong.

In the laminated heat exchanger according to the fourth aspect, the engaging portion 4e is a slit 22 formed by cutting out to the end in the direction of the gas flow reversing member 7, and the locking claw 3d of the partition plate 3 is A locking claw 3d is locked in the slit 22 and held between the casing 4 and the gas flow reversing member 7.
With this structure, the locking claw 3d of the partition plate 3 can be easily assembled to the engaging portion 4e, and the locking claw 3d is held between the casing 4 and the gas flow reversing member 7, so that The locking claw 3d of the partition plate 3 is positioned.

In the laminated heat exchanger according to the fifth aspect, the locking claws 3d of the partition plate 3 are not coated with a brazing material.
In this case, the brazing material applied to the parts (core, gas flow reversing member 7) adjacent to the partition plate 3 will rotate and be brazed during brazing, so the work of applying the brazing material to the partition plate 3 will be difficult. No longer needed.

The laminated heat exchanger according to claim 6 has an edge 3c that does not come into contact with the inner surface of the casing 4 on a part of the outer periphery of the partition plate 3, and a communication path 8 is provided between the edge 3c and the casing 4. The flow of the refrigerant 16 is reversed from the first refrigerant flow path 6a of the first core 2a to the second refrigerant flow path 6b of the second core 2b via the communication path 8.
With this structure, a structure for reversing the flow of refrigerant can be provided inside the casing, and the stacked heat exchanger can save space with a simple structure.

FIG. 1 is an exploded perspective view showing a stacked heat exchanger according to a first embodiment of the present invention. An assembled perspective view and an enlarged view of part B of the same laminated heat exchanger. The side view of FIG. 2(B) and the BB arrow sectional view of FIG. 3(A). FIG. 2A is a sectional view taken along the line IV-IV in FIG. 2(A). FIG. 5 is a sectional view taken along the line V-V in FIG. 4. FIG. 6 is a side view showing the assembled state of the partition plate 3 of the laminated heat exchanger according to the second embodiment of the present invention, and a sectional view taken along the line BB in FIG. 6(A). 7A and 7B are a side view and a cross-sectional view taken along the line B-B in FIG. 7A, showing an assembled state of the partition plate 3 of the stacked heat exchanger according to the third embodiment of the present invention.

Next, an embodiment of the present invention will be described with reference to the drawings.
Figures 1 to 5 show a stacked heat exchanger according to a first embodiment of the present invention. Figure 1 is an exploded perspective view, Figure 2(A) is an assembled perspective view, Figure 2(B) is an enlarged view of part B in Figure 2(A), Figure 3(A) is a side view of Figure 2(B), and Figure 3(B) is a cross-sectional view taken along the line B-B in Figure 3(A). Figure 4 is a cross-sectional view taken along the line IV-IV in Figure 2(A), and Figure 5 is a cross-sectional view taken along the line V-V in Figure 4.

This heat exchanger has a first core 2a and a second core 2b each made of a stack of flat tubes 1. Each flat tube 1 has a rectangular cross section, and has a pair of opposing flat parts 1a and a side part 1b connecting the flat parts 1a. Each core 2a, 2b is stacked so that the plane portions 1a are parallel to each other.
A laminated core is formed by laminating each of these cores 2a and 2b with the partition plate 3 in between. The outer periphery of the laminated core is fitted with a casing 4.

In this form, both ends of each flat tube 1 in the axial direction are expanded in the thickness direction, and an expanded portion 1c having a rectangular opening is formed. The first core 2a and the second core 2b are stacked on each other in the expanded portion 1c of the flat tube 1.
In this example, as shown in FIGS. 1 and 2, a gas header 13 is fitted to the upstream end of the first core 2a where the gas 17 flows and the downstream end of the second core 2b where the gas 17 flows. . Further, a frame 15 that binds each core 2a, 2b is fitted to the downstream end of the first core 2a where the gas 17 flows and the upstream end of the second core 2b where the gas 17 flows.

A plurality of casing bulges 20 are formed in the casing 4 into which the first core 2a and the second core 2b are fitted. It is preferable that the casing bulges 20 forming the communication path 8 be arranged at one or more of the four corners of the flat portion 1a of the flat tube 1. In this example, communication paths 8 are formed at two corners of a portion corresponding to the downstream side of the refrigerant flow of the first refrigerant flow path 6a and the upstream side of the refrigerant flow of the second refrigerant flow path 6b, which will be described later. A casing bulge 20 is formed.
Further, each casing bulge portion 20 is parallel to the side portion 1b and bulges outward integrally with the casing 4.

A partition plate 3 that separates the first core 2a and the second core 2b in the stacking direction is arranged parallel to the plane portion 1a of the flat tube 1.
The partition plate 3 has convex portions 3b protruding in the width direction of the partition plate 3 at two corners (positions corresponding to the casing bulges 20 other than the communication path 8) in its plane. The two corners forming the communication path 8 have edges 3c that do not come into contact with the casing 4.
In the casing bulge 20 other than the communication path 8, the convex portion 3b of the partition plate 3 comes into contact with the inner surface of the casing bulge 20, thereby closing the inside of the casing bulge 20 in the stacking direction.
As shown in FIG. 5, the edge 3c of the partition plate 3 that does not contact the casing 4 and the casing bulge 20 form a communication path 8 that communicates the first refrigerant flow path 6a and the second refrigerant flow path 6b.

One end of the first core 2 a and the second core 2 b are connected by a gas flow reversing member 7 via a frame 15 . In this example, the gas flow reversal member 7 is formed by a tank with a curved U-turn. Furthermore, the other ends of the first core 2a and the second core 2b are connected to a flange 9. In the flange 9, a bridge portion 9a is formed in the middle in the stacking direction of the flat tubes 1, and the opening edges of the pair of gas headers 13 are connected to the inner side of the bridge portion 9a.
The partition plate 3 is held between the gas header 13 of the first core 2a and the gas header 13 of the second core 2b.

A pair of refrigerant pipes 14 are provided protruding from the casing 4 .
In this example, as shown in FIG. 1, one refrigerant pipe 14 communicates with the first refrigerant flow path 6a of the first core 2a separated by the partition plate 3, and is connected to the upstream side of the refrigerant flow of the first refrigerant flow path 6a. It is provided in a protruding manner on the casing bulge 20 on the side. The other refrigerant pipe 14 communicates with the second refrigerant flow path 6b of the second core 2b, and the casing bulge 20 is located at the same position as the one refrigerant pipe 14 on the downstream side of the refrigerant flow of the second refrigerant flow path 6b. It is installed protrudingly.

In this laminated heat exchanger, in FIGS. 2A and 4, gas 17 flows into the first core 2a from the upper right side of the bridge portion 9a of the flange 9. The gas 17 flows inside the flat tube 1 to the left, the flow of the gas 17 is reversed downward by the gas flow reversing member 7, and flows out from the lower right side of the bridge portion 9a of the flange 9.
Further, the refrigerant 16 flows in from the refrigerant pipe 14 on the upper right side communicating with the first refrigerant flow path 6a, and flows to the left on the outer surface side of each flat tube 1 of the first core 2a. The flow of the refrigerant 16 is caused to flow through the communication path 8 (see FIG. 5) formed between the edge 3c of the partition plate 3 (see FIG. 1) and the inner periphery of the casing 4. Flip downward. The refrigerant then flows to the right on the outer surface side of each flat tube 1 of the second core 2b, and flows out from the refrigerant pipe 14 on the lower right side that communicates with the second refrigerant flow path 6b.
Heat exchange is then performed between the refrigerant 16 and the gas 17.

As an example, as shown in FIG. 4, the refrigerant flow and the gas flow can be parallel flows. In that case, by piping the refrigerant pipe 14 for the refrigerant inlet near the gas inlet and piping the refrigerant pipe 14 for the refrigerant outlet near the gas outlet, the gas inlet side where boiling tends to occur can be intensively cooled. This can prevent boiling.
Further, as shown in FIG. 1, it is preferable to provide an air vent 3a at the side end of the partition plate 3. When the stacked heat exchanger is used so that the entire stacked heat exchanger is placed parallel to the direction of gravity, the gas flow reversing member 7 is placed on the lower side, and the flange 9 is placed on the upper side, this air vent 3a is located at the upper end of each core. The air stagnant in the refrigerant pipe 14 can be made to flow from one core to the other core, and can be discharged to the outside from the refrigerant pipe 14 on the outlet side.

The stacked heat exchanger of the present invention is characterized by the positioning structure of the partition plates 3 .
The partition plate 3 of the stacked heat exchanger of the first embodiment has an engaging claw 3d formed on the outer periphery thereof, which protrudes toward the outer surface of the casing 4. As shown in FIG.
Specifically, as shown in FIGS. 1 and 2, on the side of the partition plate 3 where the gas flow reversing member 7 is disposed, and on both edge portions in the width direction of the partition plate 3, a root portion 3f is formed extending from that portion toward the gas flow reversing member 7 side, and a locking claw 3d protrudes from the outer peripheral edge of the root portion 3f toward the outer surface side of the casing.

Further, the casing 4 is formed with an engaging portion 4e that engages the locking claw 3d of the partition plate 3.
The casing 4 of this example is formed from a casing body 4a consisting of a bottom portion 4c and a pair of side wall portions 4d rising from the bottom portion 4c, and a lid body 4b fitted to the casing body 4a. In this example, the engaging portion 4e is formed as a hole 21 on the side wall portion 4d of the casing body 4a on the side where the gas flow reversing member 7 is disposed. Preferably, the height of the hole 21 is approximately the same as the thickness of the partition plate 3, and the width of the hole 21 is also approximately the same as the width of the locking claw 3d of the partition plate 3.
The engagement is achieved by inserting the locking claw 3d of the partition plate 3 into the hole 21 of the casing 4. In this engaged state, the tip of the locking pawl 3d protrudes from the outer surface of the casing 4, as shown in FIG. 3(B).
The outer peripheral edge of the base portion 3f of the partition plate 3 contacts the inner surface of the side wall portion 4d of the casing.

Furthermore, a notch 7a is formed at the edge of the connection portion of the gas flow reversing member 7 with the casing 4 at a position where the locking claw 3d is aligned. This cutout portion 7a is provided to prevent interference with the locking pawl 3d when the gas flow reversing member 7 is fitted into the casing 4 as shown in FIGS. 2(B) and 3. Further, this cutout portion 7a may not be formed.

By inserting the locking claws 3d of the partition plate 3 into the engaging portions 4e of the casing 4, the partition plate 3 is temporarily fixed vertically, left and right, and front and back. Further, the tip of the locking claw 3d of the partition plate 3 protrudes from the outer surface of the casing 4. Therefore, with a simple structure, it is possible to prevent forgetting to install the partition plate 3, and it is possible to confirm that the partition plate 3 is in the correct position.
Further, when the casing 4 is formed from a casing body 4a and a lid body 4b fitted to the casing body 4a, the locking claw 3d of the partition plate 3 is connected to the engaging portion of the side wall portion 4d of the casing body 4a. 4e, and when the partition plate 3 is pressed by the rising part of the lid body 4b when it is attached to the casing body 4a, the locking claw 3d of the partition plate 3 and the engaging part of the casing 4a can be easily attached. The assembly with 4e becomes strong.

The stacked heat exchanger assembled in this way is integrally brazed in a high-temperature furnace.
During this brazing, by applying brazing material to the parts adjacent to the partition plate 3 (for example, each core 2a, 2b, gas flow reversing member 7), the partition plate 3 Since the brazing material is passed around each contact portion of the partition plate 3 and the partition plate 3 is brazed, there is no need to apply brazing material to the partition plate 3.

If the partition plate 3 is forgotten to be installed or is misaligned, a gap corresponding to the thickness of the partition plate 3 will be created between the casing 4 and each core 2a, 2b, and there is a risk that refrigerant will leak from the gap. In addition, if the partition plate 3 is forgotten to be installed or the partition plate 3 is misaligned, the refrigerant flowing from the refrigerant pipe 14 for the refrigerant inlet will not flow from the first core 2a to the second core 2b and will flow directly into the refrigerant pipe for the refrigerant outlet. 14, making heat exchange impossible.
By having the positioning structure of the partition plate 3 as described above, it is possible to prevent forgetting to install the partition plate 3 or misalignment of the partition plate 3.
As shown in FIG. 1, a dimple 18 is provided protruding from the surface of the flat tube 1 of each core 2a, 2b, and a dimple 3e is provided protrudingly from the partition plate 3 so as to come into contact with the tip of the dimple 18. Good. This structure allows the compression to be sufficiently transmitted to the flat tubes 1 when the compression is applied from the outside of the casing of the laminated heat exchanger by a jig during brazing, and is inserted into the inside of each flat tube 1. Brazing can be performed while the inner fins are in close contact with each other.

FIG. 6(A) is a side view showing the assembled state of the partition plate 3 of the laminated heat exchanger according to the second embodiment of the present invention, and FIG. FIG.
This embodiment differs from the first embodiment in the engagement structure between the locking pawl 3d and the engagement portion 4e.
The engaging portion 4e of the casing 4 of this embodiment is cut out to the end in the direction toward the connecting portion of the gas flow reversing member 7 to form a slit 22. The locking claw 3d of the partition plate 3 is inserted into the slit 22 up to the end of the slit 22 and brought into contact with it. Thereafter, the gas flow reversing member 7 is fitted into the casing 4 and fixed by brazing with the locking claw 3d sandwiched between the casing 4 and the gas flow reversing member 7.
In this structure, it is easier to assemble and position the locking claw 3d of the partition plate 3 to the casing 4 than when the engaging portion 4e is the hole 21.

FIG. 7(A) is a side view showing the assembled state of the partition plate 3 of the laminated heat exchanger according to the third embodiment of the present invention, and FIG. FIG.
This embodiment differs from the second embodiment in that the gas flow reversing member 7 is not provided with a cutout 7a.
Even if the end face of the gas flow reversing member 7 does not have the notch 7a as described above, the same effects as in the second embodiment can be obtained.

The structure of each core 2a, 2b of the laminated heat exchanger of the present invention, the structure of the flat tube 1 forming each core 2a, 2b, the structure of the casing 4, and the structure of the gas flow reversing member 7 are as shown in the drawings. It is not limited to.
For example, as the gas flow reversing member 7, instead of a tank having a curved U-turn portion, a wide U-shaped tube or the like may be used.
Both ends of each flat tube 1 do not need to have the widened portion 1c. In that case, each flat tube 1 is inserted into the flat hole of a pair of header plates, and the header main body is attached to each header plate.
The position of the locking claw 3d of the partition plate 3 of the present invention is not limited to the position of the embodiment described in the drawings. For example, it may be provided at the position of the convex portion 3b of the partition plate 3 without providing the root portion 3f.

1 Flat tube 1a Plane part 1b Side part 1c Expanded part 2a First core 2b Second core

3 Partition plate 3a Air vent 3b Convex portion 3c Edge 3d Locking claw 3e Dimple 3f Root portion

4 Casing 4a Casing body 4b Lid 4c Bottom 4d Side wall 4e Engagement part

5a First gas flow path 5b Second gas flow path 6a First refrigerant flow path 6b Second refrigerant flow path 7 Gas flow reversal member 7a Notch 8 Communication path 9 Flange 9a Bridge portion

13 Gas header 14 Refrigerant pipe 15 Frame 16 Refrigerant 17 Gas 18 Dimple 20 Casing bulge 21 Hole 22 Slit

Claims (6)

A flat tube (1) is formed by a pair of opposing flat parts (1a) and a pair of side parts (1b) connecting both flat parts (1a), and each flat part (1a) is positioned in parallel. A large number of flat tubes (1) are stacked to form a core,
A casing is fitted along the outer periphery of the core, a gas flow path is formed in each flat tube (1), and a refrigerant flow path is formed between the outer periphery of each flat tube (1) and the casing, In a heat exchanger in which heat exchange is performed between gas flowing in a gas flow path and refrigerant flowing in a refrigerant flow path,
A first core (2a) and a second core (2b) each made of a laminate of the flat tubes (1) are provided,
The first core (2a) and the second core (2b) are arranged in the stacking direction, and the flat part (1a) located at the end of the first core (2a) near the second core (2b) and the second core (2b) are arranged in the stacking direction. The first core (2b) is disposed parallel to the flat part (1a) between the flat part (1a) located at the end of the second core (2b) close to the first core (2a), and A first refrigerant flow path (6a) is formed between the flat part (1a) located at the end of the core (2a), and a refrigerant flow path (6a) is formed at the end of the second core (2b) closer to the first core (2a). A second refrigerant flow path (6b) is formed between the flat portion (1a) located therein, and a second refrigerant flow path (6b) is further formed between the outer periphery of each tube (1) of the first core (2a) and the casing (4). a partition separating the first refrigerant flow path (6a) and the second refrigerant flow path (6b) formed between the outer periphery of each tube (1) of the second core (2b) and the casing (4); Provide a board (3),
The casing (4) fits the entire outer periphery of the cores (2a) and (2b) with the partition plate (3) located in the middle,
A flow of gas (17) is provided between one end of the first gas passage (5a) of the first core (2a) and one end of the second gas passage (5b) of the second core (2b). connected by a gas flow reversal member (7) for reversing;
A communication path (8) is provided for reversing the flow of the refrigerant (16) from the first refrigerant flow path (6a) of the first core (2a) to the second refrigerant flow path (6b) of the second core (2b). ,
A locking claw (3d) protruding toward the outer surface of the casing (4) is formed on the outer peripheral edge of the partition plate (3),
The casing (4) is formed with an engaging portion (4e) that engages the locking claw (3d) of the partition plate (3),
When the locking claw (3d) of the partition plate (3) is engaged with the engaging portion (4e) of the casing (4), the tip of the locking claw (3d) touches the outer surface of the casing (4). A stacked heat exchanger protruding from the top. The stacked heat exchanger according to claim 1,
A pair of locking claws (3d) are protruded from the widthwise edge of the partition plate (3), and the pair of locking claws (3d) A stacked heat exchanger formed on the side where the gas flow reversal member (7) is arranged. The stacked heat exchanger according to claim 1 or 2,
The casing (4) includes a casing body (4a) consisting of a bottom part (4c) and a pair of side walls (4d) rising from the bottom part (4c), and a lid body (4a) fitted into the casing body (4a). 4b) is formed from
A laminated heat exchanger, wherein the engaging portion (4e) is formed on the side wall portion (4d) of the casing body (4a) on the side where the gas flow reversal member (7) is disposed. The stacked heat exchanger according to claim 2 or 3,
The engaging portion (4e) is a slit (22) formed by cutting out to the end in the direction of the gas flow reversing member (7),
The locking claw (3d) of the partition plate (3) is locked in the slit (22),
A laminated heat exchanger in which the locking claw (3d) is sandwiched between the casing (4) and the gas flow reversal member (7). The stacked heat exchanger according to claim 4,
A laminated heat exchanger in which the locking claw (3d) of the partition plate (3) is not coated with a brazing material. The stacked heat exchanger according to claim 1,
The partition plate (3) has an edge (3c) that does not come into contact with the inner surface of the casing (4) on a part of its outer periphery, and the communication path is provided between the edge (3c) and the casing ( 4 ). (8) A laminated heat exchanger formed with.

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