JP2000193392A - Laminated heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance strength of a guide plate while preventing vibration by providing a guide plate in a through hole made at an inflated part for forming a tank and forming the guide plate to have a curved surface extending along the lateral direction of a molding plate. SOLUTION: A guide plate 19 comprises a stretching part 19a extending horizontally substantially in the center of a through hole made at an inflated part 7 for forming a tank, and an inclining part 19b bent inward of the tank part from the upper edge of the stretching part 19a. The guide plate 19 is molded integrally when a molding plate is molded while leaving the part to be punched partially at the inflated part 7 for forming a tank in order to make a through hole 17. The guide plate 19 has curved surface of constant curvature extending along the lateral direction of the molding plate 6e. When a curved surface is employed, strength of the guide plate 19 can be enhanced and heat exchanging medium (refrigerant) can be deflected well.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated heat exchanger which is used for a refrigeration cycle of an air conditioner for a vehicle and has a large number of tube elements laminated. Is suitable for a stacked heat exchanger of a type in which a plurality of passes are performed.

[0002]

2. Description of the Related Art As a heat exchanger, a heat exchanger shown in FIG. 1 or FIG. 2 and a single-tank type heat exchanger shown in FIG. 37 or FIG. 38 are known.

A heat exchanger as shown in FIGS. 1 and 2 forms a core body in which tube elements are laminated via fins 2, and a pair of tank portions 12 provided on one side of the tube element are folded back. A plurality of heat exchange medium paths are formed in the core body by appropriately communicating the tank sections 12 of adjacent tube elements with each other by the section 13, and the heat exchange medium inlet 4 is formed at one end of the core body in the stacking direction. An outlet 5 is provided so that the inlet 4 communicates with the most upstream tank block 21 via the communication pipe 30 and the outlet 5 directly communicates with the most downstream tank block 22. It is.

In the heat exchangers shown in FIGS. 37 and 38, a core body is formed by stacking tube elements via fins 2 and one side of the tube element (in FIG.
A plurality of heat exchange medium paths are formed in the core body by connecting a pair of tank sections 12 provided on the lower side) with a folded path section 13 and communicating the tank sections 12 of adjacent tube elements as appropriate. Unlike the heat exchanger, an inlet 4 and an outlet 5 for the heat exchange medium are provided on the front of the core body.

In these heat exchangers described above, the heat exchange medium flowing from the inlet 4 enters the tank block 21 on the most upstream side of the heat exchange medium path via the communication pipe 30 or directly. After a plurality of passes, it reaches the tank block 22 on the most downstream side of the heat exchange medium path, and flows out of the outlet 5 communicating with the tank block 22. Here, the one-way flow in which the heat exchange medium flows from the tank portion to the return passage portion or from the return passage portion to the tank portion is counted as one pass, and, for example, from the tank block on the most upstream side of the heat exchange medium passage. If it passes through the turn-back passage 13 twice before reaching the tank block on the most downstream side, it is called a four-pass heat exchanger, and if it passes three times, it is called a six-pass heat exchanger.

[0006]

However, in the former heat exchanger, for example, in the case of a four-pass heat exchanger,
As shown in FIG. 40 (a), when shifting from the second pass to the third pass, the heat exchange medium flows in the laminating direction via the tank portion communicating therewith. The heat exchange medium is concentrated at the back of three passes, and in the third and fourth passes, the flow rate of the heat exchange medium is reduced by the tube element near the partition 18. For this reason, when a refrigerant is used as the heat exchange medium, the temperature of the air passing between the tube elements at the same position becomes higher than that of the other parts, as is clear from the experimental results indicated by the broken line in FIG. ,
There is a disadvantage that the heat exchange efficiency is reduced.

In the figures, the tube number (TUBE)
No. ) Is the number of tube elements counted from the right side of FIG. In addition, the passing air temperature (AIR TEM
P. ) Indicates the temperature of the air passing between the tube elements and exchanging heat with the fins, and is the temperature measured at a position 1 to 2 cm away from the downstream end face of the core body.

The above-mentioned inconvenience is assumed even in a six-pass heat exchanger, and as shown in FIG. 20B, the flow of the heat exchange medium is biased. Pass, partition part 18 from pass 5 to pass 6
The temperature of the passing air is greatly different in a portion close to the above than in other portions. Further, also in the latter heat exchanger, the heat exchange medium is biased when the path is shifted from the even-numbered path to the odd-numbered path, and the flow rate of the heat exchange medium is reduced near the partition 18.

As a countermeasure for eliminating such a bias of the heat exchange medium, the present applicant has first provided a restricting portion for narrowing the cross section of the flow path at a portion where an even-numbered pass transitions to an odd-numbered pass. There has been proposed a configuration in which a heat exchange medium is sufficiently supplied to a tube element in the vicinity (Japanese Patent Laid-Open No. 8-2).
No. 85407). However, according to the configuration proposed earlier, the flow velocity is reduced by narrowing the cross section of the flow path, or the bias of the heat exchange medium is prevented by complicating the flow of the heat exchange medium. If this is the case, there is a concern that the passage resistance will increase, so careful design is required.

In addition, the applicant previously provided a path through which the heat exchange medium flows from a plurality of connected tank sections to a passage section communicating with the tank section, and a transition portion to this path, for example, from two passes to three passes. Lamination provided with a guide plate for changing the flow of the heat exchange medium moving in the lamination direction to at least one transition portion or in the vicinity of the transition portion toward the communicating portion between the destination tank portion and the passage portion communicating therewith Type heat exchanger is proposed.

Specifically, the guide portion is provided in a through hole formed in the bulging portion for forming the tank of the forming plate constituting the tube element, and the guide portion has been unnecessary until now when the through hole is punched. Manufactured by leaving sections. However, in the through hole at the transition portion, a large amount of refrigerant flows quickly, so that a force is applied to the guide portion and vibration occurs, and this vibration is transmitted to the outside as noise through the tube element or the guide portion is deformed. As a result, the guide direction may be shifted.

Therefore, according to the present invention, in the guide plate used for the purpose of reducing the drift of the heat exchange medium,
It is an object of the present invention to increase vibration strength and prevent vibration.

[0013]

In order to achieve the above object, a laminated heat exchanger according to the present invention comprises a multi-layered tube element having a plurality of tank portions and a passage communicating with the tank portions. In the laminated heat exchanger, a guide plate is provided in a part of the tube element, and a guide plate is formed in a through hole formed in a bulging portion for forming a tank of a forming plate constituting the tube element. A curved surface shape is provided along the lateral direction (claim 1).

Thus, the strength is increased by the curved surface formed on the guide plate, and the durability can be improved. In addition, because of the curved surface shape, the heat exchange medium can be changed favorably, and the formability and dimensional accuracy can be improved.

The curved shape of the guide portion may be bent at a constant curvature (claim 2), or may be formed at a portion near both ends in the lateral direction (claim 3). The curved shape may be subjected to bag-like processing (claim 4). Further, straight portions may be formed at both lateral ends of the curved guide plate (claim 5), and the straight portions may be formed in a bridge portion provided to pass through holes ( Claim 6).

Further, the laminated heat exchanger according to the present invention is a laminated heat exchanger in which a plurality of tank elements and a tube element having a passage communicating with the tank section are laminated in a multi-stage manner. A guide plate is provided in a through hole formed in a bulging portion for forming a tank of a forming plate constituting the tube element, and at least one bead is provided on the guide plate in a protruding direction from the forming plate. (Claim 7).

Thus, the strength of the bead of the guide plate is increased, and the durability is improved. In addition, moldability and dimensional accuracy can be reduced.

The length of the guide bead may be the same as or shorter than the length of the guide portion in the projecting direction (claims 8 and 9). Further, the shape may be a rhombus (claim 10).

Further, the laminated heat exchanger according to the present invention is a laminated heat exchanger in which a plurality of tank elements and a tube element having a passage communicating with the tank part are stacked in a multi-stage manner. In part, a guide plate is provided in a passage formed in a bulging portion for forming a tank of a forming plate forming the tube element, and the guide plate has rounded shoulder portions at ends in a direction protruding from the forming plate. (Claim 11).

Thus, even if the heat exchange medium flows in the rounded shape of the shoulders of the guide portion, there is no angular portion, and the vibration of the guide portion is suppressed, and the generation of vibration noise is prevented. In addition, moldability and dimensional accuracy can be improved.

The laminated heat exchanger according to the present invention is a laminated heat exchanger in which a plurality of tank elements and a tube element having a passage communicating with the tank part are stacked in many stages. A guide plate is provided in a through hole formed in the tank forming bulging portion of the forming plate constituting the tube element, and the guide plate has a curved surface shape extending along a lateral direction of the forming plate, and At least one bead is provided in the protruding direction.

In this example, the strength can be increased by forming a curved surface shape and a bead on the guide plate.

The laminated heat exchanger according to the present invention is a laminated heat exchanger comprising a plurality of stacked tank elements having a plurality of tank sections and a passage section communicating with the tank sections. A guide plate is provided in a passage formed in a bulging portion for forming a tank of a forming plate constituting the tube element, and the guide plate has a curved shape along a lateral direction of the forming plate and projects from the forming plate. In this case, both shoulders at the tip in the direction of turning are rounded (claim 13).

In this example, the guide plate is formed into a curved surface and both shoulders are rounded to improve strength and prevent vibration.

According to the laminated heat exchanger of the present invention, a part of the tube element is provided in a laminated heat exchanger in which a plurality of tube elements having a plurality of tank portions and a passage communicating with the tank portions are laminated in a multi-stage manner. In addition, a guide plate is provided in a passage formed in the tank forming bulging portion of the forming plate constituting the tube element, and the guide plate has at least one bead in a direction protruding from the forming plate, This is because both shoulders at the front end in the direction protruding from the plate are rounded (claim 14).

In this example, a bead is formed on the guide plate, and both shoulders are rounded to improve the strength and suppress the generation of vibration.

[0027] The laminated heat exchanger according to the present invention is a laminated heat exchanger in which a plurality of tanks and a tube element having a passage communicating with the tank are laminated in a multi-stage manner. A guide plate is provided in a passage formed in the tank forming bulging portion of the forming plate constituting the tube element, and the guide plate has a curved shape along the lateral direction of the forming plate, and a guide plate of the guide plate. At least one bead is provided in the protruding direction, and both shoulders at the front end in the direction protruding from the forming plate are rounded.

In this example, the formation of beads on the guide plate, the formation of a curved surface, and the rounding of both shoulders prevent an increase in strength and the occurrence of vibration.

[0029]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2, the laminated heat exchanger 1 includes, for example, a fin 2 and a tube element 3 alternately laminated in a plurality of stages to form a core body, and a heat exchange medium is provided at one end of the tube element 3 in the laminating direction. Is an evaporator of, for example, four passes provided with an inlet portion 4 and an outlet portion 5 of the tube element. The tube element 3 includes tube elements 3a and 3b at both ends in the stacking direction, a tube element 3c having an enlarged tank portion described later, Tube element 3d and tube element 3e adjacent thereto
Except for this, two molding plates 6a shown in FIG. 3A are joined.

The forming plate 6a is formed by pressing an aluminum plate, and has two bowl-shaped bulging portions 7, 7 formed at one end thereof. Subsequently, a passage-forming bulging portion 8 is formed, and a recess 9 for attaching a communication pipe to be described later is formed between the tank-forming bulging portions. Two tank forming bulges 7,7
Ridge 1 extending from between the two to the vicinity of the other end of the forming plate 6a
0 is formed. Further, a protruding piece 11 (shown in FIG. 1) for preventing the fins 2 from dropping off at the time of assembly before brazing is provided at the other end of the forming plate 6.

The tank-forming bulging portion 7 is larger than the passage-forming bulging portion 8, and the ridge 10 is formed so as to protrude so as to be flush with the margin of the peripheral edge of the forming plate. When the two forming plates 6a are joined at their peripheral edges, the projecting ridges 10 are also joined, and a pair of tank portions 12, 12 are formed by the facing tank-forming bulging portion 7, and the opposed passage-forming passages are formed. The bulging portion 8 forms a folded passage portion 13 communicating between the tank portions.

The tube element 3a at the end in the stacking direction
Is formed by joining a flat plate 14 to the forming plate 6a in FIG. 3A, and the tube element 3b is
The forming plate 6a shown in FIG.
a, which is formed by joining a flattened forming plate 6d without the bulging portion for forming a tank. Further, the forming plates 6b and 6c constituting the tube element 3c are:
One of the tank-forming bulging portions is enlarged so as to approach the other tank-forming bulging portion. Therefore, the ordinary tube element 3
Is formed, and a tank portion 12a enlarged so as to fill the concave portion is formed. The other configuration, that is, the point in which the passage forming bulging portion 8 is formed following the tank forming bulging portion, and the protrusion 10 is formed between the tank forming bulging portion 8 and the vicinity of the other end of the forming plate. It is the same as the forming plate 6 of FIG. 3 (a) in that it is formed, and that a protruding piece 11 for preventing the fin 2 from dropping is provided at the other end of the forming plate. Therefore, the description is omitted.

Further, the tube element 3d is arranged as shown in FIG.
3A is formed by combining the forming plate 6a shown in FIG. 3A and the forming plate 6d shown in FIG. 3B, and the tube element 3e is formed by combining the forming plate 6a shown in FIG. It is configured by combining with a forming plate 6e shown in c).

Of these, the through hole is not formed in one of the bulging portions 7a for forming a tank in the forming plate 6d, and a partition portion 18 for partitioning one of the tank groups 15 with this non-communicating portion is formed. I have. Even if this partition part 18 is configured such that the adjacent tube element 3e is also a blind tank having no through hole for the purpose of reinforcement, and the tank forming bulging parts having no through hole are joined together, Instead of using the blind tank, a thin plate may be interposed between the tube element 3d and the tube element 3e to close the through hole communicating between the tank portions. The forming plate 6e is adjacent to the forming plate 6d, and a guide plate 19 described below is provided at the bulging portion for forming a tank.

As shown in FIG. 1 and FIG. 2, the heat exchanger has first and second tube elements which abut in a tank portion and extend in a stacking direction (perpendicular to the ventilation direction). One tank group 1 that forms two tank groups 15, 16 and includes an enlarged tank portion 12a
5 is a forming plate 6d located substantially at the center in the laminating direction.
Except for, each tank portion is communicated via a through hole 17 formed in the bulging portion 9 for forming a tank, and the other tank group 16 is
All the tank portions communicate with each other through the through holes 17 without being partitioned.

Therefore, the first tank group 15 is partitioned by the partitioning portion 18 into a first tank block 21 including the enlarged tank portion 12a and a second tank block 22 communicating with the outlet portion 5 and is not partitioned. Second tank group 1
6 constitutes a third tank block 23 having a guide plate 19. In this embodiment, the tube elements are stacked in a total of 27 levels, and the tube elements 3c are arranged at the sixth level, the tube elements 3d are arranged at the 14th level, and the tube elements 3e are arranged at the 15th level, counted from the left in the figure. Have been.

The inlet portion 4 and the outlet portion 5 provided at one end in the laminating direction are configured by joining an entrance / exit passage forming plate 24 to the flat plate-shaped plate 14 constituting an end plate. An entrance passage 25 and an exit passage 26 extending in the longitudinal direction are formed by the plates 14 and 24,
An inflow port 2 connected to the inlet passage 25 via an expansion valve fixing joint 27 is provided above the plate 24 for forming the inlet / outlet passage.
8 and an outlet 29 connected to the outlet passage 26 are provided. The inlet passage 25 and the enlarged tank portion 12a are connected to each other by connecting a communication pipe 30 fixed to the recess 9 to a hole formed in the plate 14 and the formed plate 6b, and communicate with the second tank block 22 and the outlet passage. 26 is communicated through a hole formed in the plate 14.

Therefore, the refrigerant flowing from the inlet 4 enters the enlarged tank 12a through the communication pipe 30 and is dispersed throughout the first tank block 21.
The turn-back passage 13 of the tube element corresponding to the tank block 21 rises along the ridge 10 (first pass). Then, it makes a U-turn above the ridge 10 and descends (second pass) to reach the tank group (third tank block 23) on the opposite side. Thereafter, the tube element moves in the stacking direction toward the remaining tube elements constituting the third tank block 23 through the through holes 17, and rises along the protruding passages 13 of the tube elements along the ridges 10 (third pass). ). Then, the U-turn is made above the ridge 10 and descends (fourth pass), guided to the tank part constituting the second tank block 22, and then flows out from the outlet part 5. For this reason, the refrigerant exchanges heat with the air via the fins 2 in the process of flowing through the turn-back passage 13 forming the first to fourth passes.

Guide plate 19 provided on forming plate 6e
Is provided for the purpose of improving the flow from the second pass to the third pass, which is likely to flow unevenly as described above. This guide plate 19 is provided in FIGS. 4 and 7. As shown in the figure, a bridging portion 19a extending in the horizontal direction is formed substantially at the center of the through hole 7 formed in the bulging portion 7 for forming a tank, and the bridging portion 19a and the tank portion 1
2 and an inclined portion 19b bent inward. The guide plate 19 is integrally formed at the time of forming the forming plate while leaving a part of the originally punched portion in the bulging portion 7 for forming the tank in order to form the through hole 17. The tilt angle (θ) is
The angle is set in the range of 5 to 65 degrees, and particularly preferably in the range of 5 to 30 degrees in the above-described heat exchanger.

Therefore, the refrigerant moving in the stacking direction through the third tank block 23 through the through hole 17 to shift from the second pass to the third pass is guided by the guide plate 19 in FIG.
As shown in (3), the flow direction is changed toward the communication portion between the tank portion 12 and the passage portion 13 communicating with the tank portion 12 constituting the third path, so that the refrigerant can sufficiently flow also near the partition portion 18. The improvement of the refrigerant flow by providing such a guide plate 19 means that the refrigerant flows substantially uniformly to each tube element, and the amount of heat exchange at each location does not greatly vary.

The specific form of the guide plate 19 is shown in the drawing. First, as shown in FIGS.
Has a curved surface shape extending in the lateral direction. This curved surface shape is bent at a constant curvature. By adopting this curved shape, the strength of the guide plate 19 can be improved, and the change of the flowing heat exchange medium (refrigerant) can be improved. In this example, the guide plate 19 has a rounded (R-shaped) shape at both shoulders at the tip end in the direction (stacking direction) protruding from the forming plate. With this roundness, the shoulder is no longer angular, and vibration due to the flow of the refrigerant is suppressed.

As shown in FIGS. 8 to 10, the curved shape of the guide plate 19 is only a portion near both ends in the transverse direction of the forming plate 6e, and a flat plate shape is formed therebetween. ing. Also in this example, both shoulders of the guide plate are rounded.

The curved shape of the guide plate 19 is shown in FIGS.
As shown in FIG. 3, the forming plate 6e has a curved surface shape extending along the lateral direction, and is formed in a bag shape (bowl shape) toward the protruding end. Also in this example, both shoulders of the guide plate 19 are rounded.

The curved surface of the guide plate 19 is shown in FIGS.
As shown in FIG. 6, the molding plate 6 e has a curved surface shape extending in the lateral direction and is formed in a bag shape (bowl shape) toward the protruding end as in the above-described case. Straight portions 33, 33 are provided in the bridging portion 19a that crosses the through hole 17. Also in this example, both shoulders of the guide plate 19 are rounded.

As shown in FIGS. 17 to 19, the guide plate 19 is shown in the example in which both shoulders are rounded in the above-mentioned curved surface shape. However, the present invention is not limited to this. It may be provided.

As shown in FIGS. 20 to 22, the guide plate 19 has an inclined portion 19b bent at a predetermined angle with the erection portion 19a, and the guide surface has a flat plate shape. A continuous bent portion (referred to as a bead) 35 projecting downward in the projecting direction is formed from the erected portion 9a to the inclined portion 9b. The size of the bead 35 is the same as the direction in which the guide plate 19 protrudes (the laminating direction). By using this bead 35, the strength of the guide plate 19 can be improved, and it also contributes to the improvement of the formability and dimensional accuracy. Also in this example, both shoulders of the guide plate are rounded. The beads 35 formed on the guide plate 19 may have the same dimensions as described above, but may have shorter dimensions as shown in FIG.

As shown in FIGS. 24 to 26, the bead 35 is formed in a direction along the lateral direction of the forming plate 6e.
The guide plate 19 may be formed in a curved surface at a portion near both ends in the lateral direction. Thereby, the strength is further improved from the two configurations of the bead 35 and the curved surface formation.

As shown in FIGS. 27 to 29, the bead 35 is formed into a guide plate 19 having a curved shape along the lateral direction of the forming plate 6e and formed in a bag shape (bowl shape) toward the protruding end. May be provided. Also in this example, both shoulders of the guide plate 19 are rounded. Similarly, as shown in FIGS. 30 to 32, the guide plate 19 has the same configuration as that of the above-described example, and the straight portions 33, 3
3 may be provided on the guide plate. Also in this example, both shoulders of the guide plate 19 are rounded.

As shown in FIG. 33, the bead 35 may be formed in a rhombic shape at the bent portion of the bridge portion 19a and the inclined portion 19b. Thereby, the strength can be improved. Although the above-described bead 35 is a single display example, a plurality of beads such as two may be used although not shown.

In the above embodiment, the guide plate 19 is
34 and FIG. 36, a bridge portion 19 a provided so as to pass through the through hole 17 and an inclined portion 19 b which is bent and inclined from a side edge of the bridge portion are shown. The inclined portion 19b may be configured to be inclined from the lower peripheral edge of the through hole, and the through hole 17 may be provided in the upper part of the figure. The specific form can be appropriately adopted from FIG. 4 and the following, but in this example, the connection bend portion (bead) 35 is rounded and protrudes from the forming plate 6e in the protruding direction.
Are formed from the forming plate to the inclined portion 9b.

With this configuration, the strength is improved by the bead 35, and vibration is prevented by rounding (R processing). The guide plate 19 has straight portions 33 on both sides. Although not shown, the inclined portion 19b may be bent to have a curved shape.

FIGS. 37 and 38 show another embodiment of the present invention.
In the same portions appearing in the drawings, the same portions are denoted by the same reference numerals and description thereof is omitted.

In this laminated heat exchanger, the inlet 4 and the outlet 5 of the heat exchange medium are provided on the end face of the core body (the front face in FIG. 37).
Is provided, for example, a 4-pass evaporator,
The tube element 3 includes tube elements 3a and 3b at both ends in the stacking direction, and a tube element 3d substantially at the center.
And a tube element 3f formed integrally with a tube element 3e, an inlet 4 and an outlet 5 adjacent thereto.
Except for this, two molding plates 6a shown in FIG. 3A are joined.

In this configuration, the tube elements 3a and 3b at both ends are each composed of the forming plate 6a of FIG. 3 (a) and the flattened forming plate 6a without the bulging portion for forming a tank. It is configured by joining. In the tube element 3f, the upstream-side bulging portion 7 for tank formation projects and opens in the ventilation direction,
Therefore, the tube element 3f is formed with the entrance portion 4 or the exit portion 5 by face-to-face joining of the projecting and opened portion. Other configurations, that is, a point in which a through hole is formed in the tank forming bulge, and a point in which a passage forming bulge is formed following the tank forming bulge, The point in which a ridge is formed from between the portions to the vicinity of the other end of the forming plate, and the point in which a protruding piece for preventing the fin 2 from falling off is provided at the other end of the forming plate. The configuration is the same as that of the forming plate 6 in FIG. 3A, and the other tube elements have the same configuration as that described above.

The partition 18 and the guide plate 19 have the same construction as described above, but in this heat exchanger, 26 tube elements are stacked, and the tube element is counted 7 from the left in the figure.
The inlet 4 is formed at the stage and the outlet is formed at the twentieth. The partition 18 and the guide plate 19 are formed between the thirteenth (tube element 3e) and the fourteenth (tube element 3d) from the left. ing. Here, the guide plate 19 has the same configuration as that of the embodiment shown in FIGS. 4 to 33, and is capable of forming a curved surface, forming a bead, and further rounding both shoulders to strengthen the strength and prevent vibration. It is intended.

Therefore, in such a heat exchanger, the refrigerant flowing from the inlet 4 is dispersed throughout the first tank block 21, and the turn-back passage of the tube element corresponding to the first tank block 21. The part 13 rises along the ridge 10 (first pass). And ridge 10
And make a U-turn to descend (second pass) to reach the tank group on the opposite side (third tank block 23). Thereafter, the tube element moves in the stacking direction toward the remaining tube elements constituting the third tank block 23, and rises along the fold 10 in the turn-back passage 13 of the tube element (third pass). Then, the U-turn is made above the ridge 10 and descends (fourth pass), guided to the tank part constituting the second tank block 22, and then flows out from the outlet part 5. For this reason, the refrigerant exchanges heat with the air via the fins 2 in the process of flowing through the turn-back passage 13 forming the first to fourth passes. At this time, the refrigerant moving from the second pass to the third pass is supplied to the guide plate 19 formed at the transition portion.
Thereby, similarly to the above-described configuration, the fluid flows sufficiently to the tube element near the partition.

In the above-described configuration, the partition 18
And the forming plate provided with the guide plate 19 are formed separately. However, in order to reduce the number of forming plates required for assembling the heat exchanger, the partitioning portion 18 and the guide are provided. The plate 19 may be formed on one forming plate. According to the configuration described above, FIG.
The molding plate 6e of (c) may be replaced with a molding plate 6e 'as shown in FIG. 39, and the plate adjacent thereto may be the molding plate 6a shown in FIG. 3 (a).

[0058]

As described above, according to the present invention,
A guide plate is provided in the through hole of the tube element at a predetermined position when the heat exchange medium is caused to flow from the tank to the passage communicating with the heat exchange medium after moving the heat exchange medium in the stacking direction in the communicating tank, The flow of the heat exchange medium moving in the stacking direction is changed toward the communicating portion between the destination tank portion and the passage portion communicating therewith, but this guide plate has a curved surface shape, or a bead is provided. The strength can be improved, and vibration is prevented by rounding both shoulders of the guide plate.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of a laminated heat exchanger according to the present invention, and is a front view perpendicular to a ventilation direction of the heat exchanger.

FIG. 2 is a side view of the same entrance as the above.

FIGS. 3A and 3B show a forming plate of a tube element used for the stacked heat exchanger, FIG. 3A shows a normal forming plate 6a, FIG. 3B shows a forming plate 6d having a partition portion, c) is a forming plate 6e having a guide plate
Is shown.

4 to 37 show an embodiment of the guide plate 19 according to the present invention, and FIG. 4 is a partially enlarged front view of a forming plate having a guide plate having a curved surface shape having a constant curvature. .

FIG. 5 is a transverse sectional view of the same.

FIG. 6 is a longitudinal sectional view of the same.

FIG. 7 is a diagram illustrating a tube element having a guide plate and a tube element stacked downstream of the tube element, illustrating the shape of the guide plate and the flow of a heat exchange medium.

FIG. 8 is a partially enlarged portion of a forming plate having a guide plate having a curved surface formed in a portion near both ends in the lateral direction.

FIG. 9 is a transverse sectional view of the same.

FIG. 10 is a longitudinal sectional view of the same.

FIG. 11 is a partially enlarged front view of a forming plate having a guide plate in which a bag-shaped process is performed on a curved surface.

FIG. 12 is a transverse cross-sectional view of the same.

FIG. 13 is a longitudinal sectional view of the same.

FIG. 14 is a partially enlarged front view of a forming plate in which straight portions are provided at both lateral ends of a guide plate having a curved shape.

FIG. 15 is a transverse sectional view of the same.

FIG. 16 is a longitudinal sectional view of the same.

FIG. 17 is a partially enlarged front view of a forming plate having a guide plate with rounded shoulder portions.

FIG. 18 is a transverse sectional view of the above.

FIG. 19 is a longitudinal sectional view of the same.

FIG. 20 is a partially enlarged front view of a forming plate having a guide plate on which beads are formed.

FIG. 21 is a transverse sectional view of the same.

FIG. 22 is a longitudinal sectional view of the same.

FIG. 23 is a partially enlarged longitudinal sectional view of a forming plate having a guide plate formed with a short bead.

FIG. 24 is a partially enlarged front view of a forming plate having a guide plate in which a curved surface is formed near both ends in the lateral direction and a bead is formed.

FIG. 25 is a transverse sectional view of the same.

FIG. 26 is a longitudinal sectional view of the same.

FIG. 27 is a partially enlarged front view of a forming plate having a guide plate in which a curved surface is subjected to bag-like processing and a bead is formed.

FIG. 28 is a transverse sectional view of the above.

FIG. 29 is a longitudinal sectional view of the above.

FIG. 30 is a partially enlarged front view of a forming plate in which straight portions are provided at both ends in the lateral direction of a guide plate on which a curved shape is formed into a bag shape and beads are formed.

FIG. 31 is a transverse sectional view of the above.

FIG. 32 is a longitudinal sectional view of the same.

FIG. 33 is a partially enlarged front view of a forming plate having a guide plate formed with rhombic beads.

FIG. 34 is a partially enlarged front view of a forming plate having a slope formed by cutting a guide plate from a lower peripheral edge of a through hole.

FIG. 35 is a transverse sectional view of the same.

FIG. 36 is a longitudinal sectional view of the same.

FIG. 37 shows the second embodiment of the stacked heat exchanger according to the present invention, and is a front view perpendicular to the ventilation direction of the stacked heat exchanger.

FIG. 38 (a) is a side view of the above, and FIG.
(B) is a bottom view of the above.

FIG. 39 is a partially enlarged front view of a forming plate in which a guide portion and a partition portion are integrally formed.

FIG. 40 (a) is a conceptual diagram illustrating the flow of a heat exchange medium in a conventional four-pass laminated heat exchanger having a heat exchange medium entrance / exit portion at one end in the stacking direction of a core body. FIG. 40 (b) is a conceptual diagram illustrating the flow of a heat exchange medium in a conventional six-pass stacked heat exchanger.

FIG. 41 (a) is a characteristic diagram showing the temperature of air passing through the upper portion of the stacked heat exchanger of the first embodiment (representative temperature of air passing through the upper half between tube elements). FIG. 41 (b) is a characteristic diagram showing the temperature of air passing through the lower part of the stacked heat exchanger of the first embodiment (representative temperature of air passing through the lower half between the tube elements).

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Laminated heat exchanger 3, 3a, 3b, 3c, 3d, 3e, 3f, 3g Tube element 4 Inlet part 5 Outlet part 7 Swelling part for tank formation 12, 12a Tank part 13 Folding passage part 15, 16 Tank group REFERENCE SIGNS LIST 17 through hole 18 partition part 19 guide plate 19 a bridge part 19 b inclined part 21 first tank block 22 second tank block 23 third tank block 30 communication pipe 33 straight part 35 bead

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kunihiko Nishishita 39, Higashihara, Chiyo-ji, Odai-gun, Osato-gun, Saitama Prefecture Inside of Zexel Konan Plant (72) Inventor Masaya Yokuta Chiyo, Oga-gun, Osato-gun, Saitama 39 characters Higashihara Zexel Co., Ltd. Konan factory F term (reference) 3L065 DA13

Claims (15)

[Claims] 1. A laminated heat exchanger in which a plurality of tank elements and a tube element having a passage communicating with the tank part are stacked in many stages, wherein the tube element is formed in a part of the tube element. A laminated heat exchanger, wherein a guide plate is provided in a through hole formed in a bulging portion for forming a tank of a forming plate, and the guide plate has a curved surface shape along a lateral direction of the forming plate. 2. The stacked heat exchanger according to claim 1, wherein the heat exchanger is formed by bending a curved surface to a constant curvature. 3. The stacked heat exchanger according to claim 1, wherein a curved surface is formed at a portion near both ends in the lateral direction. 4. The laminated heat exchanger according to claim 1, wherein the curved shape is subjected to bag-like processing. 5. The laminated heat exchanger according to claim 1, wherein straight portions are formed at both lateral ends of the guide plate having a curved shape. 6. The stacked heat exchanger according to claim 5, wherein the straight portion is formed in a bridge portion provided so as to pass through the through hole. 7. A stacked heat exchanger comprising a plurality of stacked tube elements having a plurality of tank portions and a passage portion communicating with the tank portions, wherein the tube elements are formed in a part of the tube elements. A laminated heat exchanger, wherein a guide plate is provided in a through hole formed in a bulging portion for forming a tank of a forming plate, and at least one bead is provided on the guide plate in a protruding direction from the forming plate. . 8. A stacked heat exchanger wherein the length of the bead is the same as the length in the protruding direction. 9. The stacked heat exchanger according to claim 7, wherein the length of the bead is shorter than the length in the protruding direction. 10. The stacked heat exchanger according to claim 7, wherein the beads have a rhombic shape. 11. A stacked heat exchanger in which a plurality of tank elements and a tube element having a passage communicating with the tank part are stacked in a multi-stage manner, wherein the tube element is formed in a part of the tube element. A guide plate is provided in a passage formed in a bulging portion for forming a tank of a forming plate, and the guide plate has rounded shoulder portions at ends in a direction protruding from the forming plate. Exchanger. 12. A laminated heat exchanger in which a plurality of tank portions and a tube element having a passage portion communicating with the tank portion are stacked in many stages, wherein the tube element is formed in a part of the tube element. A guide plate is provided in a through hole formed in the bulging portion for forming a tank of the forming plate to be formed. The guide plate has a curved shape along the lateral direction of the forming plate, and at least one or more positions in the projecting direction of the guide plate. A stacked heat exchanger comprising the following beads. 13. A laminated heat exchanger in which a plurality of tank elements and a tube element having a passage communicating with the tank part are stacked in many stages, wherein the tube element is formed in a part of the tube element. A guide plate is provided in a passage formed in the bulging portion for forming the tank of the forming plate, and the guide plate has a curved surface shape along the lateral direction of the forming plate, and both shoulder portions at the tips in the direction protruding from the forming plate. A stacked heat exchanger characterized by having a round shape. 14. A stacked heat exchanger comprising a plurality of stacked tube elements having a plurality of tank sections and a passage section communicating with the tank sections, wherein the tube elements are formed in a part of the tube elements. A guide plate is provided in a passage formed in the tank-forming bulging portion of the forming plate. The guide plate has at least one or more beads in a direction protruding from the forming plate and has both ends in the direction protruding from the forming plate. Stacked heat exchanger with a rounded shoulder. 15. A laminated heat exchanger in which a plurality of tank elements and a tube element having a passage communicating with the tank part are stacked in many stages, wherein the tube element is formed in a part of the tube element. A guide plate is provided in a passage formed in the bulging portion for forming a tank of the forming plate. A stacked heat exchanger, wherein a bead is provided, and both shoulders at a tip end in a direction protruding from the forming plate are rounded.