WO2000020816A1

WO2000020816A1 - Laminated type heat exchanger

Info

Publication number: WO2000020816A1
Application number: PCT/JP1999/003685
Authority: WO
Inventors: Mutsumi Fukushima; Muneo Sakurada; Kunihiko Nishishita; Shozo Sekiguchi; Masaya Moruta
Original assignee: Zexel Valeo Climate Control Corporation
Priority date: 1998-10-02
Filing date: 1999-07-08
Publication date: 2000-04-13
Also published as: EP1118829A1; EP1118829A4

Abstract

A laminated type heat exchanger, comprising a guide plate (19) which moves a heat exchange medium moving in the laminating direction straight toward a communication part between a tank part as a destination and a path part communicating with the tank part; specifically, a single tank laminated type heat exchanger, comprising a guide plate (19) which moves a heat exchange medium moving in the laminating direction straight toward a communication part between a tank part on an odd numbered path and a path part communicating with the tank part is installed on a transfer part from an even numbered path to the odd numbered path, wherein the inclined angle of the guide plate (19) is within 5 to 65° relative to the laminating direction, and the length of the inclined portion is set in the range of 1 to 15 mm, whereby, in the laminated type heat exchange medium which is passed from the tank part to the path part after the heat exchange medium is moved in the laminating direction in the communicating tank part, the non-uniform flow of the heat exchange medium is reduced and heat exchange medium is passed generally uniformly to any tube element so as to increase a heat exchange efficiency, the guide plate is formed in a curved shape and beads are provided on the guide plate for reinforcement, and both shoulder parts of the guide plate are rounded so as to prevent it from being vibrated.

Description

Description Stacked heat exchanger Technical field

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated heat exchanger that is used in a refrigeration cycle of a vehicle air conditioner and has a large number of tube elements laminated. It is suitable for the stacked heat exchanger of the above. Background art

As the heat exchanger, a heat exchanger shown in FIG. 1 or FIG. 2 and a single-tank type heat exchanger shown in FIG. 15 or FIG. 16 are known.

The heat exchanger as shown in FIGS. 1 and 2 forms a core body in which tube elements are laminated via fins 2 and turns a pair of tank sections 12 provided on one side of the tube element. A plurality of heat exchange medium paths are formed in the core body by appropriately communicating the tank sections 12 of the adjacent tube elements with each other by the passage section 13, and a heat exchange medium is formed at one end of the core body in the stacking direction. An inlet 4 and an outlet 5 are provided for the body, and the inlet 4 is connected to the tank block 21 on the most upstream side via a communication pipe 30 and the outlet 5 is a tank block on the lowermost side. It is designed to communicate directly with 22. The heat exchangers shown in FIGS. 15 and 16 form a core body in which tube elements are laminated via fins 2 and a pair of tubes provided on one side (lower side) of the tube element. The tank section 12 is communicated with the folded passage section 13 and the tank section 12 of the adjacent tube element is appropriately communicated to connect A plurality of heat exchange medium paths are formed in the main body of the core. 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 that has flowed in from the inlet 4 is connected to the upstreammost block of the heat exchange medium path 21 through the communication pipe 30 or directly. After passing through 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, a 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. A two-pass heat exchanger is called a four-pass heat exchanger if it passes through the turn-back passage 13 twice from the tank block to the tank block on the most downstream side, and a six-pass heat exchanger if it passes three times.

However, in the former heat exchanger, for example, in the case of a four-pass heat exchanger, as shown in Fig. 54 (a), the heat exchange medium is used when shifting from the second pass to the third pass. Flows in the laminating direction through the tank part communicating with the heat exchanger, but the heat exchange medium concentrates at the back of the third pass due to the inertial force of the heat exchange medium, and the partition 18 in the third and fourth passes The flow rate of the heat exchange medium is reduced by the tube element close to. 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 is higher than that of the other parts, as is clear from the experimental results shown by the broken line in FIG. And the heat exchange efficiency decreases.

In the figure, the tube number (TUBEN o.) Is the number of tube elements counted from the right side in FIG. The passing air temperature (AIRTEMP.) Indicates the temperature of the air that has passed between the tube elements and exchanged heat with the fins, and is measured at a position 1 to 2 cm away from the downstream end face of the core body. Temperature.

The above-mentioned inconvenience is assumed even in a 6-pass heat exchanger, and as shown in Fig. 54 (b), the flow of the heat exchange medium is biased. However, in the fifth and sixth passes, the passing air temperature is greatly different in the portion close to the partition 18 than in the other portions. Further, in the latter heat exchanger as well, the heat exchange medium is biased when moving 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 to eliminate such bias of the heat exchange medium, the present applicant first provided a throttle section for narrowing the cross section of the flow path at a portion where the even-numbered pass changes to the odd-numbered pass, and provided a tube near the partition portion. A configuration in which a heat exchange medium is sufficiently supplied to the element has been proposed (Japanese Patent Application Laid-Open No. 8-285407). 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. Therefore, careful design is required because of the concern that passage resistance may increase.

As a measure to eliminate the uneven flow of the heat exchange medium, as shown in Japanese Patent Application Laid-Open No. 8-178851, the heat exchange medium is transferred from the upstream heat exchange block to the downstream heat exchange block. A configuration in which a swirl flow generating plate for swirling a heat exchange medium around a center line of the flow path is provided in the inter-tank flow path to be supplied is also known.

However, such a configuration, even when the bias of the heat exchange medium is eliminated, prevents the heat exchange medium from being in a gas-liquid two-phase state in the inter-tank flow path, so that the heat exchange medium is supplied by the swirling flow generating plate. Stirring to form a uniform gas-liquid mixed state, so that the upper and lower tanks do not give or remove heat exchange performance This is an effective configuration in that refrigerant in a gas-liquid mixed state is guided to each tube element.However, just turning the heat exchange medium to mix gas-liquid, as described above, for example, a four-pass In the case of a heat exchanger, as shown in Fig. 54 (a), it cannot be avoided that the heat exchange medium concentrates in the third pass due to the inertial force of the heat exchange medium. Rather, when the heat exchange medium moves along the inter-tank flow path while turning, the inertia of the turn hinders the flow of the heat exchange medium into each passage section or proceeds along the center line of the inter-tank flow path. It is difficult to change the direction of the heat exchange medium, and there is a concern that the heat exchange medium will be further concentrated in the third pass, and in the third and fourth passes, a tube element close to the partition 18 is used. The inconvenience of reducing the flow rate of the heat exchange medium is likely to be significant.

Therefore, in the present invention, a laminar heat exchange system capable of reducing the drift of the heat exchange medium and allowing the heat exchange medium to flow almost evenly to any of the tube elements in the laminating direction to improve the heat exchange efficiency. The challenge is to provide equipment. It is another object of the present invention to obtain a stacked heat exchanger that can reduce the bias by more actively dispersing the heat exchange medium while keeping the passage resistance low. Disclosure of the invention

The stacked heat exchanger according to the present invention includes a tube element having a plurality of tanks and a passage communicating with the tanks, the tanks being sequentially attached to each other, and the tube elements are stacked in many stages. All or a part of the tanks are communicated through through holes formed in each tank, and a path is provided for flowing the heat exchange medium from a plurality of connected tanks to a passage communicating with the tanks. At the transition to the path, the heat exchange medium is moved in the stacking direction through the through holes. In the configuration, the flow of the heat exchange medium moving in the laminating direction at at least one point in or near the transition portion is directed straight toward a communication portion between the tank portion at the transfer destination and a passage portion communicating with the tank portion. It is characterized by the provision of a guide plate to make it work.

According to such a configuration, the heat exchange medium moving in the stacking direction through the through holes is positively changed in the rectilinear direction by the guide plate, and the communication between the movement destination tank portion and the passage portion communicating therewith. Since the heat exchange medium travels straight toward the portion, the heat exchange medium can be distributed to each passage portion, and the heat exchange medium can be prevented from gathering near the end in the stacking direction.

In particular, in the case of a one-tank type stacked heat exchanger, a fin is used as a tube element having a pair of tank portions provided on one side and a folded passage portion communicating the pair of tank portions. The tank portions of adjacent tube elements are sequentially attached to each other, and the joined ink portions are communicated through through holes for each block, and the number of tanks constituting each block is appropriately determined. An odd-numbered path through which the heat exchange medium flows from the tank element to the passage of the tube element and an even-numbered path through which the heat exchange medium flows from the path to the tank of the tube element are provided. In the case of a stacked heat exchanger in which the heat exchange medium moves in the stacking direction through the through holes at the transition portion from the second pass to the odd-numbered pass, the transition portion or Is provided at at least one location in the vicinity thereof with a guide plate which directs the flow of the heat exchange medium moving in the laminating direction toward a communication portion between the tank portion of the odd-numbered path and the passage portion communicating therewith. What is necessary is just to be a structure.

Therefore, in such a configuration, the heat exchange medium that has flowed into the block on the most upstream side passes through the plurality of passes and then flows out of the block on the most downstream side. A guide plate is provided at the transition part of As a result, the direction in which the heat exchange medium travels is positively changed by the guide plate, and the heat exchange medium travels straight in each of the passages constituting the odd-numbered paths and is distributed substantially uniformly. The heat exchange medium can sufficiently flow through the tube element, and as a result, as shown by the solid line in FIG. 55, the temperature of the passing air does not vary greatly at various places. Can be.

Here, as a single-tank type stacked heat exchanger, an inlet portion and an outlet portion of the heat exchange medium are provided at one end of the tube element in the stacking direction, and the inlet portion communicates with a block on the most upstream side, Even if the outlet is connected to the block at the most downstream side, an inlet at right angles to the stacking direction is provided at the block at the most upstream side, and the outlet at right angles to the stacking direction is provided at the block at the most downstream side. A part may be provided.

In addition, the tube element is formed by joining two forming plates, and the forming plate provided with a partition for preventing communication between the tank portions in the laminating direction is arranged at a predetermined position, so that the heat exchange medium is formed in the tank. In the heat exchanger that bounds the path flowing from the part to the passage, the guide plate provided at the transition part may be provided on the forming plate adjacent to the forming plate provided with the partition part. Alternatively, the partition plate may be provided on the formed plate itself. Further, the partition and the guide plate may be shifted back and forth in the laminating direction within a range in which the flow rate of the heat exchange medium flowing near the partition is improved, and the guide plate provided near the transition portion is Such a configuration is also included.

By the way, if the inclination angle of the guide plate is too small with respect to the laminating direction, it is not possible to make a large change to eliminate the drift in the heat exchange medium, and if the inclination angle is too large, the passage resistance increases. As a result, the flow rate of the heat exchange medium is suppressed, and the heat exchange efficiency may be reduced. For this reason, the slope of the guide plate When the length is set in the range of 1 to 15 mm due to the effect of changing the flow direction and manufacturing restrictions, it is preferable that the inclination angle be selected in the range of 5 to 65 degrees. . Further, the guide plate may be formed separately from the tank portion, but may be formed integrally with the members constituting the tank portion in order to reduce the number of manufacturing steps and to facilitate the manufacturing. Good. -As a specific mode that the guide plate is easy to put into practical use, the guide plate is composed of an erect portion provided so as to pass through the through hole, and an inclined portion which is bent from the side edge of the erect portion and inclines. Alternatively, it may be configured to be bent from the periphery of the through hole and be inclined, or may be configured by twisting a portion provided to pass through the through hole and inclining the whole. Furthermore, in order to surely change the direction in which the heat exchange medium goes straight, a large number of guide plates may be formed at or near the transition portion.

In the above-described configuration, a path for flowing the heat exchange medium from a plurality of connected tank sections to a passage section communicating therewith is provided, and a transition portion to this path, for example, a transition portion from two passes to three passes or a portion thereof. A laminated heat exchanger provided with a guide plate for changing the flow of the heat exchange medium moving in the laminating direction to at least one location in the vicinity toward the communicating portion between the destination tank portion and the passage portion communicating therewith. This guide plate is provided in the through hole formed in the bulging portion for forming the tank of the forming plate that constitutes the tube element. It is manufactured by leaving unnecessary sections. However, since a large amount of refrigerant flows through the through-hole at the transition part, a force is applied to the guide part and vibration occurs, and this vibration is transmitted to the outside as noise through the tube element, or the guide part is The guide direction may be distorted due to deformation.

For this reason, the guide plate used for the purpose of reducing the drift of the heat exchange medium It is necessary to keep in mind that not only should the strength be increased, but also that vibration be prevented.

Therefore, as a means for solving this point, in 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 bulging portion for forming a tank of the forming plate of the tube element, and it is preferable that the guide plate has a curved surface along the lateral direction of the forming plate.

As a result, the strength is increased by the curved surface formed on the guide plate, and the durability can be improved. Also, due to the curved surface shape, the heat exchange medium can be changed favorably, and the formability and dimensional accuracy can be improved.

Further, the curved shape of the guide portion may be an example formed by bending at a constant curvature, a curved shape may be formed in a portion near both ends in the lateral direction, or a bag-shaped process may be performed on the curved shape. Also, straight portions may be formed at both lateral ends of the curved guide plate, or the straight portions may be formed in a bridge portion provided so as to pass through holes.

Further, the stacked heat exchanger according to the present invention is a stacked heat exchanger comprising a plurality of stacked tube elements each having a plurality of tank portions and a passage portion communicating with the tank portions, In part, a planner 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 this guide plate in a projecting direction from the forming plate. You may do so.

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

The length of the guide bead should be the same as or the same as the length of the guide in the protruding direction. Shorter dimensions may be used. Further, the shape may be a rhombus.

Further, the laminated heat exchanger of 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 laminated in a multi-stage manner. 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 rounded shoulder portions at a tip end in a direction protruding from the forming plate. You may do so.

As a result, 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 is a laminated heat exchanger in which a plurality of tank sections 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 which constitutes an element.The guide plate has a curved surface along a lateral direction of the forming plate and has a curved surface in a projecting direction of the guide plate. At least one bead may be provided. In this example, the guide plate has a curved surface shape and a bead, so that the strength can be increased.

The laminated heat exchanger is a laminated heat exchanger in which a plurality of tank sections 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 passage formed in a bulging portion for forming a tank of a forming plate that constitutes an element, and the guide plate has a curved surface along a lateral direction of the forming plate and protrudes from the forming plate. A configuration in which both shoulders at the tip in the direction are rounded may be used. In this example, the guide plate has a curved shape and both shoulders are rounded for strength. The improvement of the degree and the occurrence of vibration are prevented.

The laminated heat exchanger 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 laminated in a multi-stage manner. A guide plate is provided in the passage formed in the bulging portion for forming the tank of the forming plate, and the inner plate is provided with at least one bead in a direction protruding from the forming plate and protrudes from the forming plate. The two shoulders at the end of the direction may be rounded.

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

The laminated heat exchanger is a laminated heat exchanger formed by laminating a plurality of tank elements and a tube element having a passage portion communicating with the tank section in a multi-stage manner. A guide plate is provided in a passage formed in a bulging portion for forming a tank of a forming plate, which constitutes a tube element. The guide plate has a curved surface along a lateral direction of the forming plate and a projecting direction of the guide plate. It is also possible to provide at least one or more beads at each end, and to make both shoulders at the front end in the direction protruding from the forming plate round.

In this example, by forming a bead on the guide plate, forming a curved surface, and rounding both shoulders, the strength is increased and vibration is prevented. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 shows a first embodiment of the laminated heat exchanger according to the present invention, and is a view showing an end face of the heat exchanger which is perpendicular to a ventilation direction.

FIG. 2 (a) is a diagram showing a side surface of the stacked heat exchanger shown in FIG. 1 where an inlet / outlet portion is provided, and FIG. 2 (b) is a diagram of the stacked heat exchanger shown in FIG. The bottom FIG.

Fig. 3 shows a forming plate of a tube element used for a stacked heat exchanger. Fig. 3 (a) shows a normal forming plate 6a, and Fig. 3 (b) shows a forming plate 6 having a partition. Fig. 3 (c) shows a molded plate 6e having a guide plate. -Fig. 4 is a diagram showing an example of a configuration in which the guide plate is formed substantially at the center of the through hole. Fig. 4 (a) is an enlarged front view of a part of the forming plate on which the guide plate is formed. FIG. 4 (b) shows a tube element having a guide plate and a tube element laminated downstream from the tube element, and illustrates the shape of the guide plate and the flow of the heat exchange medium.

FIG. 5 is an enlarged view showing a tank portion of a tube element having a guide plate.

FIG. 6 is a front view of a forming plate showing a configuration example in which the guide plate is formed below the center of the hole.

FIG. 7 is a front view of a forming plate showing a configuration example in which the guide plate is formed above the center of the hole.

FIG. 8 is a front view of a forming plate showing a configuration example in which a guide plate is integrally formed at a lower end portion of a bulging portion for forming a tank.

FIG. 9 is a diagram showing another example of the configuration in which the guide plate is formed substantially at the center of the through hole. FIG. 9 (a) is a front view in which a part of the forming plate on which the guide plate is formed is enlarged. FIG. 9 (b) shows a tube element having a guide plate and a tube element stacked downstream from the tube element, and illustrates the shape of the guide plate and the flow of the heat exchange medium.

FIG. 10 is a diagram showing a configuration example in which a guide plate is formed by bending a guide plate outside a tank portion provided with the guide plate. FIG. 11 is a diagram showing a configuration example in which the inclination angle of the guide plate is gradually increased. FIG. 12 is a diagram showing an example of a configuration in which a plurality of guide plates are formed in the upper half of the through hole. FIG. 12 (a) is an enlarged view of a part of the forming plate on which the guide plates are formed. FIG. 12 (b) is a front view showing a tube element having a guide plate and a tube element laminated downstream from the tube element, illustrating the shape of the guide plate and the flow of the heat exchange medium. FIG.

FIG. 13 is a diagram showing a configuration example in which a plurality of guide plates are formed in the entire through hole. FIG. 13 (a) is an enlarged view of a part of the forming plate in which the guide plates are formed. FIG. 13 (b) is a diagram showing a tube element having a guide plate and a tube element laminated downstream thereof, and illustrating the shape of the guide plate and the flow of the heat exchange medium. is there.

FIG. 14 is a diagram showing an example of the configuration of FIG. 13 in which the guide plate in the lower half of the through hole is horizontal, and FIG. 14 (a) shows a configuration in which the guide plate is formed. Fig. 14 (b) is an enlarged front view of a part of the forming plate. Fig. 14 (b) shows a tube element having a guide plate and a tube element laminated downstream from the tube element. It is a figure explaining the flow of a heat exchange medium.

FIG. 15 shows a second embodiment of the stacked heat exchanger according to the present invention, and is a diagram showing an end face of the stacked heat exchanger which is perpendicular to the ventilation direction.

FIG. 16 (a) is a diagram showing a side view of the stacked heat exchanger shown in FIG. 15, and FIG. 16 (b) is a view of the stacked heat exchanger shown in FIG. It is a figure which shows a bottom surface.

FIG. 17 is an enlarged front view of a part of a forming plate having a guide plate and a partition formed in a body.

FIG. 18 is a view showing a configuration in which guide plates are provided at two places of adjacent tube elements, and the inner plates are brought into contact with each other to make the inclined portions continuous. FIG. 19 is a diagram showing a state in which guide plates are provided at two locations of adjacent tube elements, and the guide plates are formed with an interval therebetween.

FIGS. 20 to 52 show an embodiment of the guide plate 19 according to the present invention. FIG. 20 shows one example of a forming plate having a guide plate having a curved surface shape having a constant curvature. It is a part enlarged front view. -Fig. 21 is a cross-sectional view of the same.

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

FIG. 23 is a view showing a tube element having the above-mentioned guide plate and a laminated tube element on the downstream side thereof, and illustrating the shape of the guide plate and the flow of the heat exchange medium.

FIG. 24 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. 25 is a cross-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 obtained by performing a bag-like processing on a curved surface shape.

FIG. 28 is a cross-sectional view of the same.

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

FIG. 30 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. 31 is a cross-sectional view of the same.

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 having rounded shoulder portions.

FIG. 34 is a cross-sectional view of the same. FIG. 35 is a longitudinal sectional view of the same.

FIG. 36 is a partially enlarged front view of a forming plate having a guide plate formed with beads.

FIG. 37 is a cross-sectional view of the same.

FIG. 38 is a longitudinal sectional view of the same. -Fig. 39 is a partially enlarged longitudinal sectional view of a forming plate having a guide plate formed with a short bead.

FIG. 40 is a partially enlarged front view of a forming plate having a guide plate in which a curved shape is formed near both ends in the lateral direction and a bead is formed.

FIG. 41 is a cross-sectional view of the same.

FIG. 42 is a longitudinal sectional view of the same.

FIG. 43 is a partially enlarged front view of a forming plate having a guide plate on which a curved surface is subjected to bag-like processing and a bead is formed.

FIG. 44 is a cross-sectional view of the same.

FIG. 45 is a longitudinal sectional view of the same.

FIG. 46 is a partially enlarged front view of a forming plate in which straight portions are provided at both lateral ends of a guide plate on which a bead is formed into a curved surface and a bead is formed.

FIG. 47 is a cross-sectional view of the same.

FIG. 48 is a longitudinal sectional view of the same.

FIG. 49 is a partially enlarged front view of a forming plate having a guide plate formed with rhombic beads.

FIG. 50 is a partially enlarged front view of a forming plate having a slope formed by cutting a guide plate from a lower edge of a through hole.

FIG. 51 is a cross-sectional view of the same. FIG. 52 is a longitudinal sectional view of the same.

FIG. 53 is a partially enlarged front view of a forming plate in which a guide portion and a partition portion are integrally formed.

FIG. 54 (a) is a conceptual diagram illustrating the flow of the heat exchange medium in a conventional four-pass laminated heat exchanger having a heat exchange medium inlet / outlet at one end of the core body in the stacking direction. Yes, Fig. 54 (b) is a conceptual diagram illustrating the flow of the heat exchange medium in a conventional six-pass type stacked heat exchanger.

FIG. 55 (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 the tube elements). FIG. 55 (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). is there. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIGS. 1 and 2, the laminated heat exchanger 1 has, for example, a core body formed by alternately laminating a plurality of fins 2 and tube elements 3 in a plurality of stages, and having one end of the tube element 3 in the laminating direction. For example, a four-pass evaporator with an inlet 4 and an outlet 5 for the heat exchange medium is provided. The tube element 3 includes the tube elements 3a and 3b at both ends in the stacking direction, and an enlarged tank section described later. Excluding the tube element 3c, the tube element 3d at the center and the tube element 3e adjacent to the tube element 3c, it is formed by joining two molded plates 6a shown in Fig. 3 (a). .

The forming plate 6a is formed by pressing an aluminum plate, and has two bowl-shaped bulging portions 7, 7 at one end. Is formed, and a bulging portion 8 for forming a passage is formed subsequently thereto. A concave portion 9 for attaching a communication pipe to be described later is formed between the bulging portions for forming a tank. The forming bulge 8 is formed with a ridge 10 extending from between the two tank forming bulges 7, 7 to near the other end of the forming plate 6a. Further, a protrusion 11 (shown in FIG. 1) for preventing the fins 2 from dropping out at the time of assembly before brazing is provided at the other end of the forming plate 6.

The bulging portion 7 for forming a tank is formed to protrude larger than the bulging portion 8 for forming a passage, 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 ridges 10 are also joined, and a pair of tank portions 12, 12 are formed by the opposed bulging portions 7 for tank formation, and the opposed The folded passage-forming bulging portion 8 forms a folded passage portion 13 communicating between the tank portions.

The tube element 3a at the end in the laminating direction is formed by joining a flat plate 14 to the forming plate 6a in FIG. 3 (a), and the tube element 3b is formed as shown in FIG. 3 (a). The molding plate 6a is formed by joining the molding plate 6a and a molding plate which has been flattened without the bulge portion for forming the ink. The forming plates 6b and 6c constituting the tube element 3c are formed so as to be enlarged so that one of the bulging portions for forming a tank approaches the bulging portion for forming the other tank. Therefore, the tank element 12 formed in the ordinary tube element 3 and the tank part 12a expanded so as to fill the concave portion are formed in the tube element 3c. The other configuration, that is, the passage forming bulge 8 is formed following the tank forming bulge, and the ridge 1 extends from between the tank forming bulge 8 and the other end of the forming plate. 0 Is formed, and the other end of the forming plate is provided with a protruding piece 11 for preventing the fin 2 from falling off. The description is omitted because it is the same.

Further, the tube element 3 d is constituted by combining a forming plate 6 a shown in FIG. 3 (a) and a forming plate 6 d shown in FIG. 3 (b). Is formed by combining a forming plate 6a shown in FIG. 3 (a) and a forming plate 6e shown in FIG. 3 (c).

Of these, the forming plate 6d does not have a through-hole formed in the one tank forming bulging portion 7a, and a partitioning portion 18 that partitions the one tank group 15 with this non-communicating portion is formed. Have been. For the purpose of reinforcement, the partition 18 is configured such that the adjacent tube element 3 e is also a blind tank having no through-hole, and the tank-forming bulging portions having no through-hole are joined together. Alternatively, instead of using a blind tank, a configuration may be adopted in which a thin plate is sandwiched between the tube element 3d and the tube element 3e to close the through hole communicating between the tank portions. Further, the forming plate 6e is adjacent to the forming plate 6d, and a guide plate 19 described below is provided in the bulging portion for forming a tank.

Then, as shown in FIG. 1 and FIG. 2, the first and second heat exchangers extend in the stacking direction (perpendicular to the ventilation direction) with the adjacent tube elements abutting on the tank portion. Two tank groups 15 and 16 are formed, and one of the tank groups 15 including the enlarged tank section 12 a is formed with the exception of the forming plate 6 d located almost at the center in the stacking direction. The tanks communicate with each other through the through holes 17 formed in the bulging portion 9, and the other tank group 16 communicates with all the tanks through the holes 17 without being partitioned. ing.

Therefore, the first tank group 15 is divided by the partition 18 into an expanded tank section. A second tank group 16, which is partitioned into a first tank block 21 containing 1 a and a second tank block 22 communicating with the outlet section 5, has an inner plate 19. The third tank block 23 is constituted. In this configuration, the tube elements are stacked in a total of 27 layers, and the tube element 3c is in the sixth layer, the tube element 3-d is in the fourth layer, and the 15-layer is in the fourth layer, counting from the left in the figure. Tube elements 3e are arranged on the eyes, respectively. The inlet part 4 and the outlet part 5 provided at one end in the laminating direction are configured by joining an entrance / exit passage forming plate 24 to the flat plate 14 forming an end plate. An inlet passage 25 and an outlet passage 26 extending in the longitudinal direction are formed by these plates 14 and 24, and the upper portion of the inlet / outlet passage forming plate 24 is provided with an inlet via an expansion valve fixing joint 27. An inlet 28 connected to the passage 25 and an outlet 29 connected to the outlet 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 concave portion 9 to a hole formed in the plate 14 and the forming plate 6b. The tank block 22 and the outlet passage 26 communicate with each other through a hole formed in the plate 14.

Therefore, the refrigerant flowing in from the inlet 4 enters the expansion tank 12 a through the communication pipe 30, is dispersed throughout the first tank block 21, and corresponds to the first tank block 21. The ascending passage section 13 of the tube element rises along the ridge 10 (first pass). Then, it goes down over the protruding line 10 after making a U-down (2nd pass), and reaches the tank group on the opposite side (3rd tank block 23). After that, it moves in the laminating direction toward the remaining tube element constituting the third tank block 23 through the through hole 17, and passes through the folded passage portion 13 of the tube element along the ridge 10. Rise (third pass). Then, make a U-turn above the ridge 10 and descend (4th pass). 2 The tank is guided to the tank constituting the tank block 22 and then flows out from the outlet 5. For this reason, the refrigerant exchanges heat with the air through the fins 2 in the process of flowing through the return passage 13 forming the first to fourth passes. The guide plate 19 provided on the forming plate 6e is provided in order to improve this since it is likely to flow unevenly as described above at the transition from the second pass to the third pass. As shown in FIGS. 4 and 5, the guide plate 19 has a bridge portion 19a extending in the horizontal direction substantially at the center of the through hole 7 formed in the bulging portion 7 for tank formation. And an inclined portion 19 b bent from the upper edge toward the inside of the tank portion 12. The guide plate 19 is formed integrally with the bulging portion 7 for forming the tank while forming the forming plate, leaving a part of the portion to be originally punched out to form the through hole 17. The inclination angle (Θ) with respect to the stacking direction is set in the range of 5 to 65 degrees, and more preferably, in the range of 5 to 30 degrees in the heat exchanger described above. . In addition, the length of the inclined portion in the tank portion (L: in this example, the length of the inclined portion 19b protruding from the erection portion) may be set in the range of 1 to 15 mm, as described above. In the configuration, it is set to about 2 to 6 mm.

If the angle of the inclined portion 19b is too large, the passage resistance increases and the pressure loss increases, and the amount of heat radiation (heat exchange) decreases due to the decrease in the refrigerant flow rate. If the value is too small, the flow direction of the refrigerant cannot be changed sufficiently, and the conventional disadvantageous distribution of the refrigerant cannot be eliminated. In addition, since the flow of the refrigerant varies depending on the configuration of the heat exchanger, in order to improve the flow of the refrigerant based on these circumstances, it is necessary to use a gradient of 5 ≤ (≤ 65 degrees. In this angle range, if 6> is large, the flow of the refrigerant is increased even if the length L of the inclined portion is small. If the air is small, it is necessary to extend L to an appropriate length to determine the flow direction of the refrigerant, and to cut and raise the bulging part for tank formation to form an inclined part L must be set within the range of 1≤L≤15 mm due to manufacturing restrictions. Therefore, the most suitable guide plate 19 may be formed by combining and L in such a range, and in the above-described four-pass heat exchanger, after examining various combinations, It is set to a numeric value.

Therefore, the refrigerant that moves in the stacking direction through the through holes 17 through the third tank process 23 to move from the second pass to the third pass forms the third pass by the guide plate 19. The rectilinear direction is changed toward the communicating portion between the tank portion 12 and the passage portion 13 communicating with the tank portion 12, so that the refrigerant can sufficiently flow also in the vicinity of 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 that the amount of heat exchange in each place does not greatly vary. Actually, according to the experimental results in Fig. 55 where the passing air temperature was measured, as shown by the solid line, the air passed through the upper part of the tube element (particularly TUBEN No. 5 to 13) near the partition. It was confirmed that the air temperature was lower than that of the conventional air conditioner without the guide plate 19, and the temperature distribution was uniform throughout.

The above-described guide plate 19 is formed by an erecting portion 19a and an inclined portion 19b bent from the erecting portion 19a, and has a configuration in which only one is formed substantially at the center of the through hole 17. However, it is possible to obtain the same operation effect by changing the shape, number, etc. of the forming locations and the guide plates. In the following, an example thereof is shown in FIGS. 6 to 14, and the configuration shown in FIG. 6 is a guide plate 19 constituted by an erection portion 19a and an inclined portion 19b. Shaped so that it is biased downward from the approximate center of through hole 17 On the contrary, the configuration shown in Fig. 7 is different from the configuration shown in Fig. 7 in that the guide plate 19 formed by the erected portion 19a and the inclined portion 19b is positioned above the substantially center of the hole 17. The configuration shown in FIG. 8 has an inclined portion 19 b that is bent inward from the periphery of the lower end of the through hole 17 formed in the bulging portion 7 for tank formation to the inside of the tank portion. It is formed integrally. -Also, as shown in Fig. 9, the shape of the guide plate 19 is such that the remaining part, which passes through the through hole 17 horizontally, is twisted with both ends as fulcrums, and the whole is inclined. Also, as shown in FIG. 10, the inclined portion 1 is bent at an acute angle from the upper edge of the erection portion 19a toward the outside of the tank portion 12 on which the guide plate 19 is provided. As shown in FIG. 11, the inclined portion 19b may be formed in a curved shape in which the angle gradually increases as shown in FIG.

By forming a large number of guide plates 19, it is possible to more effectively change the direction of straight movement of the refrigerant, and as shown in FIG. 12, as shown in FIG. A plurality (three in this example) of guide plates 19 may be formed so as to be inclined upward toward, and the guide plate 19 may not be formed in the lower half. These guide plates 19 may be formed integrally with the bulging portion 7 for tank formation, and may be formed in parallel with equal inclination angles.

According to such a configuration, the refrigerant that has passed through the lower half of the through hole 17 is sent straight to the stacking direction and sent to the back of the third tank block 23, and the refrigerant that has passed through the upper half is guided by the guide. The straight traveling direction is changed by the plate 19 and flows toward the inflow portion of each passage portion 13 of the tube element constituting the third pass. Therefore, the refrigerant sufficiently flows also in the tube element near the partition, and the same effect as described above can be obtained.

As another example, as shown in FIG. 13, the guide plate 19 has a through hole 17 A plurality (five in this example) of guide plates 19 that incline the downstream side upward in the entire through hole are formed integrally, and the flow direction of the refrigerant moving to the third pass is totally You may change it. Further, as shown in FIG. 14, the guide plate 19 formed in the lower half may be horizontal to secure the flow of the refrigerant flowing in the laminating direction. In particular, the former configuration is effective when the number of tube elements constituting the third pass is small, and the latter configuration has a large number of tube elements, and the refrigerant is evenly distributed to the front and back. This is effective when you want to drain.

Note that the configuration of the guide plate is not limited to the above-described configuration, and the same effects can be obtained in the above-described various configurations even if the number of the guide plates and the formation position are appropriately changed. .

FIGS. 15 and 16 show a second embodiment of the laminated heat exchanger. Hereinafter, different portions will be mainly described, and the same portions shown in the drawings will be denoted by the same reference numerals. And the description is omitted.

This laminated heat exchanger is, for example, a four-pass evaporator having a heat exchange medium inlet 4 and an outlet 5 provided on the end face of the core body (the front face in FIG. 15). The tube elements 3a and 3b at both ends in the stacking direction, the tube element 3d at the substantially center, the tube element 3e adjacent to the tube element 3e, and the tube element 3f in which the inlet 4 and the outlet 5 are formed in a body. Except for this, it is constructed by joining two forming plates 6a shown in Fig. 3 (a).

In this configuration, the tube elements 3a and 3b at both ends are formed flat by removing the forming plate 6a of FIG. 3 (a) and the bulging portion for forming the tank of the forming plate 6a. It is configured by joining a plate. In the case of the tube element 3f, the bulging portion for forming the tank on the upstream side 7 protrudes and opens in the ventilation direction, and therefore, the tube element 3 f is formed with an inlet portion 4 or an outlet portion 5 by joining the protruding and open portions face-to-face. Other configurations, that is, a through hole is formed in the tank forming bulge, a passage forming bulge is formed following the tank forming bulge, and a tank forming bulge is formed. A ridge is formed from between the protruding portions to the vicinity of the other end of the forming plate, and a ridge is provided at the other end of the forming plate to prevent the fins 2 from falling off. This is the same as the forming plate 6 in FIG. 3 (a), and the other tube elements have the same configuration as that described above, so that the description is omitted.

The partition 18 and the guide plate 19 have the same configuration as described above. However, in this heat exchanger, 26 tube elements are stacked, and the seventh row is counted from the left in the figure. The inlet 4 has an outlet at the 20th stage, and the partition 18 and the throttle 19 are the 13th stage (tube element 3e) and the 14th stage (tube element 3d) from the left. Is formed between. Here, the guide plate 19 may have various configurations shown in FIG. 4 to FIG. 14 or a configuration in which the number and the formation position are different from these, and the guide plate 19 is inclined at an angle <with respect to the horizontal direction. The length L of the portion is formed in the range of 5≤6> ≤65 degrees and 1≤L15 mm described above.

Therefore, in such a heat exchanger, the refrigerant flowing from the inlet 4 is dispersed throughout the first tank block 21, and the return path of the tube element corresponding to the first tank block 21 is formed. Ascend Part 13 along ridge 10 (Pass 1). Then, it goes down above the ridges 10 and goes down (second pass) until it reaches the tank group on the opposite side (third tank block 23). After that, it moves in the laminating direction toward the remaining tube elements constituting the third tank block 23, and turns back the tube elements 1 3 Ascend along the ridge 10 (3rd pass). Then, it makes a U-turn above the protruding ridge 10 and descends (4th pass), and is guided to the evening portion forming the second tank block 22, and then flows out of the outlet portion 5. For this reason, the refrigerant exchanges heat with the air via the fins 2 in the process of flowing through the return passage portion 13 forming the first to fourth passes. At this time, the refrigerant traveling from the second pass to the third pass is changed in the straight traveling direction by the guide plate 19 formed at the transition portion in the same manner as in the above-described configuration, and is also transmitted to the tube element near the partition. It will flow enough.

In the above-described configuration, the forming plate provided with the partition 18 and the forming plate provided with the guide plate 19 are formed separately. However, the forming plate required for assembling the heat exchanger is formed. In order to reduce the number of types of plates, the partition 18 and the guide plate 19 may be formed on one forming plate. According to the configuration described above, the forming plate 6e in FIG. 3 (c) is replaced with a forming plate 6e ′ as shown in FIG. 17, and the adjacent plate is replaced with the plate in FIG. ) May be used as the forming plate 6a.

Further, in the above-described configuration, the guide plate 19 provided at the transition portion from the even-numbered pass to the odd-numbered pass is formed on the forming plate adjacent to the partition portion 18 or the forming plate provided with the partition portion. Although the case of forming is shown, the present invention is not limited to this. The vicinity of the transition portion of the second or third pass (for example, a tube element one or two away from the tube element having the partition 19) May be provided with a guide plate.

The numerous guide plates 19 described above suppress the drift by suppressing the passage resistance and actively change the straight direction of the heat exchange medium, and also suppress the swirl flow of the heat exchange medium, thereby reducing the heat exchange. The direction of the medium is changed without fail, and the heat exchange medium can easily flow into the return passage 13 of each tube element. It is characterized in that the drift is suppressed, and the throttle portion disclosed in Japanese Patent Application Laid-Open No. H08-285707 cannot be obtained by the guide plate disclosed in Japanese Patent Application Laid-Open No. H08-178851. It is effective. However, for example, the guide plate 19 of the present invention may be used in combination with the throttle section disclosed in Japanese Patent Application Laid-Open No. 8-285407. Since the throttle portion of the publication also aims at the same effect of suppressing the drift of the heat exchange medium, it is sufficiently possible to prevent the drift by using it together.

Further, even if the guide plate 19 is formed of a member separate from the forming plate, the guide plate 19 may be formed in the vicinity of the forming plate provided with the partition portion 18 or the forming plate provided with the partition portion 18. The guide plate may be provided at a plurality of positions on the plate and in the vicinity thereof so as to be shifted in the laminating direction. Providing the guide plate at at least one location in or near the transition portion means not only the configuration shown in FIGS. 12 to 14 but also a plurality of locations where the guide plate is shifted in the stacking direction. It also includes the case where it is provided in

As a configuration in which the guide plates 19 are provided at a plurality of positions shifted in the laminating direction, for example, the configuration shown in FIG. 18 or FIG. 19 can be considered. In these examples, in the tube element 3 e and the tube element 3 g adjacent thereto, the forming plate located on the upstream side with respect to the flow of the heat exchange medium moving the third tank block 23 in the laminating direction. 6 e and 6 f are provided with guide plates, and these guide plates 19 are inclined portions 1 which are bent inward from the periphery of the lower end of the through hole 17 formed in the bulging portion 7 for tank formation to the inside of the tank portion. 9b is integrally formed.

In particular, in the example shown in FIG. 18, the guide plate 19 formed on the forming plate 6 e is extended to the through hole of the other forming plate 6 a constituting the tube element 3 e, and the forming plate 6 This is in contact with the guide plate 19 formed on f. The two inclined guide plates are connected continuously, and the length L of the inclined portion as a whole is determined by the length L 1 of the guide plate 19 formed on the forming plate 6 e and the guide formed on the forming plate 6 f. This is the total length of the plate 19 and the length L2.

Therefore, the length L of the inclined portion set in the range of 1 ≤ L ≤ 15 mm described above is a range for setting the length of the inclined portion 19 b of each guide plate 19- However, when a sufficient length cannot be ensured by one inclined portion, this is also a range for setting the total length when a plurality of inclined portions of the guide plate are connected. If the inclined portions of the plurality of guide plates are made continuous as described above, the flow direction of the heat exchange medium flowing in the laminating direction can be reliably guided in the intended direction, and the tube near the partition portion 18 It is easy to obtain a substantially uniform temperature distribution by sufficiently supplying the refrigerant to the element.

Further, the example shown in FIG. 19 is similar to the structure shown in FIG. 18 except that the length L 1 of the inclined portion 19 b of the guide plate 19 formed on the forming plate 6 e is shortened. An interval is provided between the guide plate 19 formed on the element and the guide plate 19 formed on the forming plate 6f on the extension of the guide plate 19 formed on the forming plate 6e. It is common to Fig. 18 in that it is provided.

Even with such a configuration, the refrigerant whose flow direction has been changed by the front guide plate smoothly moves to the back guide plate due to inertia, and is further guided by this transferred inner plate to each tube element. As a result, the same effect can be obtained.

In addition to the above-described configuration, various configurations in which a plurality of guide plates are provided to be shifted in the laminating direction are conceivable, and even if the formation positions are appropriately changed within a range in accordance with the gist of the present invention, or You may combine with a form.

As shown in FIGS. 20 to 23, the guide plate 19 described above 6e, it may have a curved surface shape along the horizontal direction. This curved shape is bent to a certain curvature. By adopting this curved surface shape, the strength of the guide plate 19 can be improved, and the change of the flowing heat exchange medium (coolant) 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. 24 and 26, the curved shape of the guide plate 19 is limited to a portion near the both ends in the transverse direction of the forming plate 6e, and a flat plate therebetween. It is shaped like a letter. Also in this example, the shoulders of the guide plate are rounded.

As shown in Figs. 27 and 29, the guide plate 19 has a curved shape along the horizontal direction of the forming plate 6e and a bag shape (bowl shape) toward the protruding end as shown in Figs. Has formed. Also in this example, both shoulders of the guide plate 19 are rounded.

As shown in FIGS. 30 to 32, the curved surface of the guide plate 19 has a curved shape along the lateral direction of the forming plate 6e and a bag shape (bowl shape) toward the protruding end. Is formed in the same manner as described above, but has straight portions 33, 33 in the erected portion 19a crossing the through hole 17 on both sides of the guide plate. Also in this example, both shoulders of the guide plate 19 are rounded.

As shown in FIGS. 33 and 35, the guide plate 19 is shown in the example in which both shoulders are rounded in the above-mentioned curved surface shape, but is not limited thereto. It may be provided in a flat plate shape.

As shown in Fig. 36 and Fig. 38, 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. ing However, a continuous bent portion (referred to as a bead) 35 protruding downward from the forming plate 6e in the protruding direction is formed from the erection portion 9a to the inclined portion 9b. The dimension of the bead 35 is the same as the direction in which the guide plate 19 protrudes (the laminating direction). By using the bead 35, the strength of the guide plate 19 can be improved, and it also contributes to the improvement of 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. 40 and 42, the bead 35 is formed on a guide plate 19 having a curved surface at a portion near both ends in the lateral direction along the lateral direction of the forming plate 6e. You may. Thereby, the strength is further improved from the two configurations of the bead 35 and the curved surface formation.

As shown in FIGS. 43 and 45, the bead 35 is formed so as to have a curved surface along the lateral direction of the forming plate 6e and a bag shape (bowl shape) toward the protruding end. It may be provided on the guide plate 19 formed in the above. Also in this example, both shoulders of the guide plate 19 are rounded. Similarly, as shown in FIGS. 46 and 48, the guide plate 19 has the same configuration as that of the above-mentioned example, and the strut portions 33, 3 are attached to the erection portions 19a on both sides. It may be provided on a guide plate having 3. In this example, both shoulders of the inner plate 19 are rounded.

As shown in FIG. 49, the bead 35 may be formed in a rhombic shape at a bent portion of the erected portion 19a and the inclined portion 19b. Thereby, the strength can be improved. The above-described bead 35 is a single display example. However, although not shown, plural examples such as two may be used. In the above-described embodiment, the guide plate 19 is provided with an erect portion 19 a provided so as to pass through the through hole 17, and an inclined portion 1 which is bent and inclined from a side edge of the erect portion. 9 and 9b, as shown in FIGS. 50 and 52, an inclined portion 19b is formed by inclining from the lower edge of the through hole, and the through hole 17 May be provided above the figure. The specific form can be adopted as appropriate from FIG. 20 and onward. In this example, the round plate is formed, and the connecting bent part (bead) 35 is formed in the projecting direction from the forming plate 6 e. It is formed from-to the inclined portion 9b.

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

In the heat exchangers shown in FIGS. 15 and 16, the guide plate 19 described above can be similarly provided. That is, the guide plate 19 has the same configuration as that of the embodiment shown in FIGS. 20 to 49, and forms a curved surface, forms a bead, and furthermore, rounds both shoulders to increase strength. The reinforcement and prevention of vibration are achieved. In the above-described configuration, the forming plate provided with the partition 18 and the forming plate provided with the guide plate 19 are formed separately, but the forming plate required for assembling the heat exchanger is formed. In order to reduce the number of types of plates, the partition 18 and the guide plate 19 may be formed on one forming plate. According to the configuration described above, the forming plate 6e in FIG. 3 (c) is replaced with a forming plate 6e 'as shown in FIG. 53, and a plate adjacent thereto is replaced with the plate shown in FIG. The forming plate 6a shown in (a) may be used. Industrial applicability

As described above, according to the present invention, after the heat exchange medium is moved in the laminating direction in the communicating tank portion, the heat exchange medium is transferred from the tank portion to the passage portion communicating therewith. When a medium is introduced, a guide plate is provided to guide the flow of the heat exchange medium moving in the stacking direction straight toward the communicating part between the destination tank part and the passage part communicating therewith. In addition, the heat exchange medium can be distributed almost uniformly to each tube element, and it is possible to prevent the flow of the heat exchange medium from being biased and the passing air temperature from being greatly different depending on the passage location. Also, since the guide plate was used to actively change the direction of the heat exchange medium in the straight direction, it was possible to reduce the deviation of the heat exchange medium while keeping the passage resistance low, and to generate a swirling flow. Since the heat exchange medium can be suppressed, the heat exchange medium can be easily guided to the passage near the transition portion.

In particular, in a single-tank heat exchanger, if a guide plate is provided at the transition from the even-numbered pass to the odd-numbered pass, the heat exchange medium will also be provided in the passage immediately after the transition to the odd-numbered pass. As a result, the heat exchange distribution can be made almost uniform.

In addition, among the forming plates constituting the tube element, a forming plate provided with a partitioning portion that bounds a path for flowing the heat exchange medium from the tank portion to the passage portion is provided. Alternatively, if the heat exchange medium is provided on the forming plate provided with the partition, the heat exchange medium can be easily guided to the passage near the partition. In particular, when the guide plate and the partition are provided on the same forming plate, the types of forming plates required for assembling the heat exchanger can be reduced.

The improvement of the flow of the heat exchange medium by the guide plate depends on how the inclination angle of the guide plate and the length of the inclined part are combined, but the inclination angle in the range of 5 to 65 degrees and the range of 1 to 15 mm If the lengths of the inclined portions are appropriately set, the deviation of the heat exchange medium can be reduced and the heat exchange efficiency can be improved. In addition, if the guide plate is formed integrally with the members constituting the tank part, the number of manufacturing steps can be reduced, Manufacturing can be facilitated.

The guide plate can be of various shapes, but it may be constructed by an erect portion provided to pass through the through-hole and an inclined portion which is bent from the side edge of the erect portion and inclines. If the shape is formed by bending directly from the periphery of the hole and inclined, or by twisting the part provided so as to pass through the hole, the entire shape is inclined.- It is possible to provide a structure that is easy to manufacture and easy to put into practical use. . Further, if a large number of guide plates are formed at or near the transition portion, the flow of the heat exchange medium can be reliably changed, and the drift of the heat exchange medium can be effectively suppressed.

Further, according to the above configuration, when the heat exchange medium is moved in the stacking direction in the communicating tank portion and then flows into the passage portion communicating with the heat exchange medium from the tank portion, the tube element at a predetermined position is used. A guide plate is provided in the through hole of the tank, and 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. It is possible to improve the strength by shaping or providing a bead, and to have the effect of preventing vibration by rounding both shoulders of the guide plate.

Claims

The scope of the claims

1. A plurality of tube elements each having a plurality of tank portions and a passage portion communicating with the tank portions are laminated in a number of stages by sequentially contacting the tank portions, and all of the joined tank portions are stacked. Alternatively, a part of the tank is communicated through a through hole formed in each tank part, and a path for flowing the heat exchange medium from a plurality of connected tank parts to a passage part communicating with the tank part is provided. In the laminated heat exchanger in which the heat exchange medium is moved in the laminating direction through the through hole in the portion, the flow of the heat exchange medium moving in the laminating direction is moved to the transition portion or at least one location near the transition portion. A stacked heat exchanger, comprising a guide plate for straightly moving toward a communicating portion between the preceding tank portion and a passage portion communicating therewith.

2. A tube element having a pair of tank portions provided on one side and a folded passage portion communicating with the pair of tank portions is laminated in multiple stages via fins, and the tank portions of adjacent tube elements are stacked. When the tanks are connected sequentially, the tanks connected to each other are communicated through the through holes for each block, and the number of tanks constituting each block is set appropriately and heat is applied from the evening to the passage of the tube element. An odd-numbered path through which the exchange medium flows and an even-numbered path through which the heat exchange medium flows from the passage of the tube element to the tank are provided, and a transition from the even-numbered path to the odd-numbered path is provided. In the stacked heat exchanger in which the heat exchange medium moves in the stacking direction through the through holes,

A guide plate for directing the flow of the heat exchange medium moving in the laminating direction toward the communication portion between the tank portion of the odd-numbered path and the passage portion communicating therewith at the transition portion or at least one portion near the transition portion. Characterized by the provision of Stacked heat exchanger.

3. The tube element is formed by joining two molding plates, and the heat exchange medium is disposed at a predetermined position by disposing a molding plate provided with a partition for preventing communication between the tanks in the stacking direction. Claims characterized in that a guide plate provided at the transition portion is provided on a forming plate adjacent to the forming plate provided with the partition portion, which bounds a path flowing from the tank portion to the passage portion. 3. The laminated heat exchanger according to paragraph 1 or 2.

4. The heat exchange medium is formed by joining the tube element with two molding plates and disposing a molding plate having a partition for preventing communication between the tanks in the stacking direction at a predetermined position. 3.A path that flows from the tank section to the passage section is bounded, and a guide plate provided at the transition portion is provided on a forming plate provided with the partition section. Stacked heat exchanger.

5. The guide plate is inclined in a range of 5 to 65 degrees with respect to a stacking direction of the tube elements, and a length of the inclined portion is set in a range of 1 to 15 mm. Item 5. The multilayer heat exchanger according to any one of Items 4 to 4.

6. The laminated heat exchanger according to any one of claims 1 to 4, wherein the guide plate is formed integrally with a member constituting a tank portion.

7. The guide plate is composed of an erect portion provided so as to pass through the through-hole, and an inclined portion which is bent from a side edge of the erect portion and inclines. Stacked heat exchanger according to any one of the preceding clauses.

8. The laminated heat exchanger according to any one of claims 1 to 6, wherein the guide plate is configured to be inclined from a periphery of the through hole.

9. The guide plate is formed by twisting a part provided to pass the through hole. The stacked heat exchanger according to any one of claims 1 to 6, wherein the stacked heat exchanger is configured to be inclined.

10. The stacked heat exchanger according to any one of claims 1 to 6, wherein a large number of the guide plates are formed at or near the transition portion.

11. A stacked heat exchanger comprising a plurality of tube elements having a plurality of tube portions and a passage portion communicating with the tank portion in a multi-layer structure.

A guide plate is provided in a part of the tube element in a through hole formed in a bulging portion for forming a tank of a forming plate constituting the tube element, and the guide plate has a curved surface along a lateral direction of the forming plate. A stacked heat exchanger characterized by the following.

12. The laminated heat exchanger according to any one of claims 1 to 8, wherein the guide plate has a curved surface shape extending along a lateral direction of the forming plate.

13. The stacked heat exchanger according to claim 11, wherein the curved surface shape is bent to a constant curvature.

14. The laminated heat exchanger according to claim 11 or claim 12, wherein a curved surface is formed at a portion near both ends in the lateral direction.

15. The laminated heat exchanger according to any one of claims 11 to 14, wherein the curved shape is subjected to bag-like processing.

16. The laminated heat exchanger according to claim 11, wherein straight portions are formed at both lateral ends of the guide plate having a curved shape.

17. The laminated heat exchanger according to claim 16, wherein the straight portion is formed in a bridge portion provided so as to pass through the through hole.

18. A stacked heat exchanger in which a plurality of tube elements each having a plurality of tank sections and a passage section communicating with the tank sections are stacked in multiple stages, A guide plate is provided in a part of the tube element in a through hole formed in a bulging portion for forming a tank of a forming plate constituting the tube element, and the guide plate has at least one or more locations in a projecting direction from the forming plate. A stacked heat exchanger characterized by a bead.

19. The laminated heat exchanger according to any one of claims 1 to 8, wherein the guide plate is provided with at least one or more beads in a projecting direction from the forming plate. .

20. The stacked heat exchanger according to claim 18 or claim 19, wherein the length of the bead is the same as the length in the protruding direction.

21. The laminated heat exchanger according to claim 18 or claim 19, wherein the length of the bead is shorter than the length in the protruding direction.

22. The laminated heat exchanger according to claim 18 or claim 19, wherein the beads have a rhombic shape.

23. In a laminated heat exchanger formed by stacking a plurality of tube elements each having a plurality of tank sections and a passage section communicating with the tank sections,

A guide plate is provided in a part of the tube element in a passage formed in a bulging portion for forming a tank of a forming plate constituting the tube element, and the guide plate is provided at both ends in a direction protruding from the forming plate. A stacked heat exchanger with a rounded shoulder.

24. The laminated heat source according to any one of claims 1 to 8, wherein the guide plate has rounded both shoulders at a tip in a direction protruding from the forming plate. Exchanger.

25. In a laminated heat exchanger formed by stacking a plurality of tube elements and a plurality of tube elements each having a passage portion communicating with the tank section,

A component constituting the tube element is provided 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 shaped plate, and the guide plate has a curved surface shape along the lateral direction of the forming plate, and at least one or more places in the projecting direction of the guide plate. A stacked heat exchanger characterized by providing beads.

26. The guide plate is formed into a curved shape along a lateral direction of a forming plate, and at least one bead is provided in a projecting direction of the guide plate. 9. The stacked heat exchanger according to any one of items 8 to 9.

27. In a laminated heat exchanger comprising a plurality of stacked tank elements each having a plurality of tank sections and a passage section communicating with the tank sections,

A guide plate is provided in a part of the tube element 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 surface along a lateral direction of the forming plate. In addition, a stacked heat exchanger characterized in that both ends of the tip in the direction protruding from the forming plate are rounded.

28. The method according to claim 1, wherein the guide plate is formed into a curved shape along a lateral direction of the forming plate, and both shoulders at a tip in a direction protruding from the forming plate are rounded. 9. The stacked heat exchanger according to any one of clauses 8.

29. In a laminated heat exchanger formed by stacking a plurality of tube elements each having a plurality of tank sections and a passage section communicating with the tank sections,

A guide plate is provided in a part of the tube element in a passage formed in a bulging portion for forming a tank of a forming plate constituting the tube element, and the guide plate is provided in at least one position in a direction protruding from the forming plate. A stacked heat exchanger comprising the above-mentioned beads and rounded shoulders at the tip in the direction protruding from the forming plate.

30. At least one point on the guide plate in the direction protruding from the forming plate 9. The laminated heat exchanger according to claim 1, wherein the beads are provided, and both shoulders at a tip end in a direction protruding from the forming plate are rounded. vessel.

31. A stacked heat exchanger comprising a plurality of stacked tube elements having a plurality of tank sections and a passage section communicating with the ink section, wherein:-a tube element is provided 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 constituting the element, and the guide plate has a curved surface along a lateral direction of the forming plate and has a A laminated heat exchanger comprising at least one bead and at least two shoulders at a tip end in a direction protruding from the molding plate.

32. The guide plate is formed into a curved shape along the lateral direction of the forming plate, and at least one bead is provided in a projecting direction of the guide plate, and both shoulders at a tip end in a direction protruding from the forming plate are provided. The laminated heat exchanger according to any one of claims 1 to 8, wherein the portion is rounded.