JP2000111293A - Multilayer-type heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the efficiency of heat exchange in a multilayer-type heat exchanger in which a heat exchanging medium is moved in the direction of multiple layers in a sequential tank portion and then allowed to flow from the tank portion to a conduit portion, by reducing the channeling of the heat exchanging medium and allowing the heat exchanging medium to almost evenly flow with respect to any of tube elements. SOLUTION: A guide plate is provided which changes the flow of a heat exchanging medium moving in the direction of multiple layers to a communicating portion between a tank portion 12 as a destination and a conduit portion communicating therewith. In the case of a single tank type multilayer-type heat exchanger, the guide plate 19 is provided at a shift portion from an even- numbered path to an odd-numbered path, which guide plate changes the flow of the heat exchanging medium moving in the direction of multiple layers to the communicating portion between the tank portion 12 at the odd-numbered path and the conduit portion communicating with it. A slanting angle of the guide plate 19 is set in the range of 5 to 65 degrees with respect to the direction of multiple layers and the length of the slanting portion is set in the range of 1 to 15 mm.

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 in a refrigeration cycle of an air conditioner for a vehicle and has a large number of tube elements laminated, and in particular, a tube having a pair of tank portions provided on one side. The present invention is suitable for a stacked heat exchanger in which elements are stacked via fins and a plurality of heat exchange media are passed.

[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. 15 or FIG. 16 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.

The heat exchangers shown in FIGS. 15 and 16 form a core body in which tube elements are stacked via fins 2 and are provided on one side of the tube element (in the drawings,
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. 20 (a), when shifting from the second pass to the third pass, the heat exchange medium flows in the stacking direction via the communicating tank portion. 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. Therefore, 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 portions, 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.

Therefore, according to the present invention, there is provided a laminated type in which the uneven flow of the heat exchange medium is reduced, and the heat exchange medium is caused to flow almost evenly in any one of the tube elements in the laminating direction to improve the heat exchange efficiency. It is an object to provide a heat exchanger. It is another object of the present invention to provide a stacked heat exchanger that can reduce bias by more actively dispersing the heat exchange medium while keeping the passage resistance low.

[0011]

In order to achieve the above object, a laminated heat exchanger according to the present invention comprises a tube element having a plurality of tanks and a passage communicating with the tanks. The tank portions are sequentially attached to each other and stacked in multiple stages, and all or a part of the attached tank portions are communicated through through holes formed in each tank portion, and a plurality of connected tank portions are connected to each other. A path through which the heat exchange medium flows into a passage communicating with the path, and at a transition to the path, the heat exchange medium is moved in the stacking direction via the through-holes. A guide plate for changing the flow of the heat exchange medium moving in the laminating direction toward a communication portion between the tank portion at the transfer destination and a passage portion communicating therewith is provided at a location (claim). ).

According to such a configuration, the flow direction of the heat exchange medium moving in the stacking direction through the through holes is positively changed by the guide plate, and the movement destination tank portion and the passage portion communicating therewith are formed. Therefore, the heat exchange medium can be distributed to each of the passage portions, and the heat exchange medium can be prevented from gathering near the end in the stacking direction.

In particular, in the case of a single-tank type laminated heat exchanger, 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 finned. The tank parts of adjacent tube elements are sequentially attached to each other, and the assembled tank parts are communicated through through holes for each block, and the number of tank parts constituting each block is appropriately set. An odd-numbered path through which the heat exchange medium flows from the tank section of the tube element to the passage section, and an even-numbered path through which the heat exchange medium flows from the passage section of the tube element to the tank section 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 a transition portion from the to the odd-numbered pass, the transition portion or In at least one location in the vicinity,
A guide plate may be provided to change 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 (claim 2). .

Therefore, in such a configuration,
After a plurality of passes of the heat exchange medium flowing into the most upstream block, the heat exchange medium flows out of the most downstream block.At this time, a guide plate is provided at a transition portion from the even-numbered path to the odd-numbered path. Since the flow direction of the heat exchange medium is positively changed by the guide plate, the heat exchange medium is distributed substantially uniformly to each of the passages constituting the odd-numbered paths, and the heat exchange medium is supplied to all the tube elements. As a result, the temperature of the passing air does not vary widely at various places as shown by the solid line in FIG. 21. Therefore, the above-described problem can be achieved.

Here, in the 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 is provided in the most upstream block. Communication, even if the outlet portion is configured to communicate with the most downstream block, or the most upstream block,
An inlet section perpendicular to the laminating direction may be provided, and an outlet section perpendicular to the laminating direction may be provided in the most downstream block.

Further, the tube element is constituted 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 provided. In a heat exchanger that bounds a path flowing from the tank section to the passage section, the guide plate provided at the transition portion may be provided on a forming plate adjacent to the forming plate provided with the partition portion. Alternatively, the partition may be provided on the forming plate itself provided with the partition (claims 3 and 4). Further, within a range in which the flow rate of the heat exchange medium flowing near the partition portion is improved, the partition portion and the guide plate may be shifted back and forth in the stacking direction, and the guide plate provided near the transition portion may 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 impossible to make a large change to eliminate the above-mentioned drift in the heat exchange medium. Is increased, the flow rate of the heat exchange medium is suppressed, and the heat exchange efficiency may be reduced. For this reason, when the length of the inclined portion of the guide plate is set in the range of 1 to 15 mm due to the effect of changing the flow direction and the manufacturing restriction, the inclination angle is selected in the range of 5 to 65 degrees. It is desirable (claim 5). In addition, the sign is
It may be formed separately from the tank part, but may be formed integrally with the member constituting the tank part in order to reduce the number of manufacturing steps and facilitate the manufacturing (claim 6). .

As a specific mode in which the guide plate is easily put into practical use, the guide plate is constituted by a bridge portion provided so as to pass through the through hole and an inclined portion which is bent from the side edge of the bridge portion and inclines. (Claim 7), even if it is configured so as to be bent from the periphery of the through hole and inclined (Claim 8), the portion provided to pass the through hole is twisted and the whole is inclined. (Claim 9). Further, in order to surely change the flow of the heat exchange medium, a plurality of guide plates may be formed at or near the transition portion (claim 10).

[0019]

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 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 a margin for joining the periphery 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.

Tube element 3a at end in 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 is formed by joining a flattened forming plate without the bulging portion for forming a tank. The forming plates 6b and 6c constituting the tube element 3c are formed so as to be enlarged such that one of the tank-forming bulging portions approaches the other tank-forming bulging portion. Therefore, the tank element 12 formed in the normal tube element 3 and the tank part 12a expanded so as to fill the concave portion are formed in the tube element 3c. Other configurations,
That is, following the swelling portion for forming the tank, the swelling portion 8 for forming the passageway.
Is formed, the ridge 10 is formed from between the bulging portion 8 for tank formation to the vicinity of the other end of the forming plate, and furthermore, the fin 2 is prevented from falling off at the other end of the forming plate. The point in which the protruding piece 11 is provided is the same as that of the forming plate 6 in FIG.

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, a 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 are adjacent to each other in the tank portion and extend in the 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 formed by joining an inlet / outlet 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 inlet 28 connected to the inlet passage 25 through an expansion valve fixing joint 27 is provided at an upper portion of the inlet / outlet passage forming plate 24.
And an outlet 29 connected to the outlet passage 26 are provided. The inlet passage 25 and the enlarged tank portion 12a
The communicating pipe 30 fixed to the recess 9 is
And the second tank block 22 and the outlet passage 26 are connected to each other by being joined to a hole formed in the forming plate 6b.
They are communicated via holes 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 in order to improve the flow from the second pass to the third pass, which is apt to flow unevenly as described above. This guide plate 19 is provided in FIG. 4 and FIG. 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 formed integrally with the bulging portion 7 for forming the tank while forming a forming plate while leaving a part of the portion to be punched out. 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. In addition, the length of the inclined portion in the tank portion (L: in this example, the length of the inclined portion 19a protruding from the erection portion)
May be set in a range of 1 to 15 mm, and is set to about 2 to 6 mm in the above-described configuration.

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 (the amount of heat exchange) decreases due to the decrease in the flow rate of the refrigerant. Is too small, the flow direction of the refrigerant cannot be changed sufficiently, and the conventional disadvantageous bias of the refrigerant cannot be eliminated. Also, depending on the configuration of the heat exchanger, there is also a difference in the flow of the refrigerant, based on these circumstances, in order to improve the flow of the refrigerant,
It is necessary to set the inclination angle in the range of 5 ≦ θ ≦ 65 degrees.
For such an angle range, if θ is large, the flow of the refrigerant can be changed to some extent even if the length L of the inclined portion is small, and if θ is small, L is extended to an appropriate length. It is necessary to determine the flow direction of the refrigerant, and it is necessary to set L in the range of 1 ≦ L ≦ 15 mm due to manufacturing restrictions for cutting and raising the bulging portion for forming a tank to form an inclined portion. Therefore, the most suitable guide plate 19 may be formed by combining θ and L in such a range. In the above-described four-pass type heat exchanger, after examining various combinations, it is set to the numerical value described above. ing.

Therefore, the refrigerant moving in the stacking direction through the third tank block 23 through the hole 17 to shift from the second pass to the third pass is guided by the guide plate 19 to the third tank.
The tank part 12 constituting the path and the passage part 1 communicating therewith
3, the flow direction is changed toward the communication portion with the
Also in the vicinity of 8, the refrigerant flows sufficiently.

The improvement of the refrigerant flow by providing such a guide plate 19 means that the refrigerant flows substantially uniformly through each tube element, and the amount of heat exchange at each location does not vary greatly. According to the experimental results of FIG. 21 in which the passing air temperature was actually measured, as shown by the solid line, the tube element (particularly TUBE No.
5-13) The temperature of the air passing between the upper stages is reduced by the guide plate 19.
It was confirmed that the temperature distribution was lower than that of the conventional one without the temperature distribution, and that the temperature distribution became uniform throughout.

The above-described guide plate 19 is formed by a bridge portion 19a and an inclined portion 19b bent from the bridge portion 19a, and has a configuration in which only one guide hole is formed substantially at the center of the through hole 17. It is possible to obtain the same operation and effect by changing the shape and number of the guide plates and the like. 6 to 14, the configuration shown in FIG. 6 is such that the guide plate 19 formed by the erection portion 19 a and the inclined portion 19 b is located below the substantially center of the hole 17. The configuration shown in FIG. 7 is different from the configuration shown in FIG. 7 in that the guide plate 1 is formed by an erect portion 19a and an inclined portion 19b.
9 is formed so as to be deflected above the substantially center of the through hole 17, and the configuration shown in FIG. 8 is such that the lower end periphery of the through hole 17 formed in the bulging portion 7 for tank formation has An inclined portion 19b which is bent inward is formed integrally.

As shown in FIG. 9, the shape of the guide plate 19 is obtained by twisting the remaining portion so as to pass the through hole 17 horizontally using both ends as fulcrums and inclining the entire portion. Also, as shown in FIG. 10, a configuration in which the inclined portion 19 b is formed by being bent from the upper edge of the bridge portion 19 a toward the outside of the tank portion 12 provided with the guide plate 19 at an acute angle, Further, as shown in FIG. 11, the inclined portion 19b may be formed in a curved shape in which the angle gradually increases.

By forming a large number of guide plates 19,
It is possible to change the flow direction of the refrigerant more effectively.
2, a plurality (three in this example) inclined upward from the upstream side to the downstream side in the upper half of the through hole 17.
The guide plate 19 may be formed, 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 back of the third tank block 23 in the stacking direction, and the refrigerant that has passed through the upper half is guided by the guide plate. At 19, the flow direction is changed and flows toward the inflow portion of each passage portion 13 of the tube element constituting the third pass. For this reason, 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, a plurality of guide plates 19 are provided in the lower half of the through hole 17 and the downstream side is inclined upward in the entire through hole (five in this example). May be integrally formed to change the flow direction of the refrigerant moving to the third pass as a whole. As shown in FIG. 14, a guide plate 19 formed in the lower half is provided.
May be horizontal to ensure the flow of the refrigerant flowing in the stacking 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 the tube elements,
This is effective when it is desired to make the refrigerant flow evenly both forward and backward.

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 guide plates and the position of formation are appropriately changed. be able to.

FIGS. 15 and 16 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 at the end face of the core body (the front face in FIG. 15).
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. The other configuration, that is, the point where the passage forming bulge is formed following the tank forming bulge, a ridge is formed from between the tank forming bulge and the vicinity of the other end of the forming plate. This is similar to the forming plate 6 of FIG. 3A in that the protruding pieces for preventing the fins 2 from falling off are provided at the other end of the forming plate. Since the tube element has the same configuration as that described above, the description is omitted.

The partition 18 and the guide plate 19 have the same structure 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 entrance 4 is formed at the stage and the exit is formed at the twentieth stage, and the partition 18 and the throttle unit 19 are formed between the thirteenth stage (tube element 3e) and the fourteenth stage (tube element 3d) from the left. ing. Here, the guide plate 19 may have various configurations shown in FIGS. 4 to 14 or a configuration in which the number and the formation position are different from those shown in FIGS. L is 5 ≦ θ ≦ 65 described above.
Degrees are formed in the range of 1 ≦ L ≦ 15 mm.

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 configuration described above, 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. 17, and a plate adjacent thereto may be the molding plate 6a shown in FIG. 3 (a).

In the above-described configuration, the guide plate 19 provided at the transition from the even-numbered pass to the odd-numbered pass is formed by a forming plate adjacent to the partition 18 or a forming plate provided with the partition. However, the present invention is not limited to this, but is formed in the vicinity of the transition portion of the second or third pass (for example, one or two tube elements separated from the tube element having the partition 19). A guide plate may be provided.

The various guide plates 19 described above are characterized in that the flow direction of the heat exchange medium is positively changed while the flow resistance is kept low, thereby suppressing the drift.
Although it has a specific effect that cannot be obtained by the throttle portion disclosed in Japanese Patent Application Laid-Open Publication No. H10-209, the throttle plate disclosed in the Japanese Patent Application Publication No. 2000-133873 and the guide plate 19 of the present invention may be used in combination. Since the conventional throttle section 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 the same in combination.

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 in the vicinity of the forming plate provided with the partition portion 18. In the vicinity thereof, guide plates may be provided at a plurality of positions shifted in the laminating direction. Providing the guide plate at the transition portion or at least one location in the vicinity thereof includes not only the configuration shown in FIGS. 12 to 14 but also the case where the guide plate is provided at a plurality of locations shifted in the stacking direction. It is a thing.

As a configuration in which the guide plates 19 are provided at a plurality of positions shifted in the laminating direction, for example, a configuration shown in FIG. 18 or FIG. 19 can be considered. These examples are based on the tube element 3e and the tube element 3 adjacent thereto.
g, guide plates are provided on the forming plates 6e and 6f located on the upstream side with respect to the flow of the heat exchange medium moving in the third tank block 23 in the laminating direction. Through hole 17 formed in bulging portion 7
Inclined portion 19b that bends from the lower edge to the inside of the tank
Are integrally formed.

In particular, in the example shown in FIG. 18, the guide plate 19 formed on the forming plate 6e is extended to the through hole of the other forming plate 6a constituting the tube element 3e and formed on the forming plate 6f. These two inclined guide plates are brought into contact with each other in contact with the guide plate 19, and the length L of the inclined portion is formed as a whole by the length L1 of the guide plate 19 formed on the forming plate 6e and the length of the forming plate 6f. And the total length of the guide plate 19 and the length L2.

Therefore, the length L of the inclined portion set within the range of 1 ≦ L ≦ 15 mm described above is one for each guide plate 1.
9 is a range for setting the length of the inclined portion 19a,
When a sufficient length cannot be ensured by one inclined portion, this is also a range for setting the total length when the inclined portions of a plurality of guide plates are connected.

As described above, by making the inclined portions of the plurality of guide plates continuous, it is possible to reliably guide the flow direction of the heat exchange medium flowing in the laminating direction to the intended direction.
The refrigerant is sufficiently supplied also to the tube element in the vicinity of the partition 18 to easily obtain a substantially uniform temperature distribution.

In the example shown in FIG. 19, the length L1 of the inclined portion 19a of the guide plate 19 formed on the forming plate 6e in the configuration of FIG. 18 in that a guide plate 19 formed on the forming plate 6f is provided on an extension of the guide plate 19 formed on the forming plate 6e. .

Even in 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 the transferred guide plate to allow each tube element to move. And 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 stacking direction are conceivable.
The formation position may be appropriately changed within a range in accordance with the gist of the present invention, or may be combined with the above-described various embodiments.

[0055]

As described above, according to the present invention,
In the case where 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 flow of the heat exchange medium moving in the stacking direction by providing the guide plate is provided. Of the heat exchange medium can be distributed almost uniformly to each tube element, and the heat exchange medium can be distributed to the respective tube elements. It is possible to avoid that the flow is biased and the passing air temperature greatly differs depending on the passing place. Also, since the flow of the heat exchange medium is positively changed by the guide plate, the deviation of the heat exchange medium can be reduced while the passage resistance is kept low.

In particular, in a single-tank type 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 be guided to the passage immediately after the transition to the odd-numbered pass, and the heat exchange distribution will be almost uniform. Can be

Further, of the forming plates constituting the tube element, a guide plate is formed by a guide plate adjacent to the forming plate provided with a partition portion for defining a path for flowing the heat exchange medium from the tank portion to the passage portion. plate,
Alternatively, if the heat exchange medium is provided on the molding 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 is as follows.
Depending on how to combine the inclination angle of the guide plate and the length of the inclined part, the inclination angle in the range of 5 to 65 degrees, 1 to
By appropriately setting the lengths of the inclined portions in the range of 15 mm, the drift of the heat exchange medium can be reduced and the heat exchange efficiency can be improved. Further, if the guide plate is formed integrally with the member constituting the tank portion, the number of manufacturing steps can be reduced and the manufacturing can be facilitated.

The guide plate can be of various shapes. The guide plate may be constituted by 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. A structure that is easy to manufacture and can be easily put into practical use can be provided by forming a shape that is bent by bending directly from the periphery of the through hole or that is formed by twisting a portion provided so as to pass through the through hole so that the whole is inclined. . 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.

[Brief description of the drawings]

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

2 (a) is a view showing a side surface of the stacked heat exchanger shown in FIG. 1 where an entrance / exit portion is provided, and FIG. 2 (b).
FIG. 2 is a diagram illustrating a bottom surface of the stacked heat exchanger illustrated in FIG. 1.

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.

FIG. 4 is a view showing a configuration example in which a guide plate is formed substantially at the center of a through hole, and FIG. 4A is an enlarged front view of a part of a forming plate on which the guide plate is formed. And FIG.
(B) is a figure which shows the tube element which has a guide plate, and the tube element laminated | stacked downstream from it, and is a figure explaining the shape of a guide plate, and the flow of a heat exchange medium.

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

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

FIG. 7 is a front view of a forming plate showing a configuration example in which a guide plate is formed above the center of a through 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 configuration example in which the guide plate is formed substantially at the center of the through hole. FIG. 9A is an enlarged view of a part of the forming plate on which the guide plate is formed. FIG. 9 is a front view, and FIG.
(B) is a figure which shows the tube element which has a guide plate, and the tube element laminated | stacked downstream from it, and is a figure explaining the shape of a guide plate, and the flow of a heat exchange medium.

FIG. 10 is a diagram illustrating 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 illustrating a configuration example in which the inclination angle of the guide plate is gradually increased.

FIG. 12 is a diagram showing a configuration example in which a plurality of guide plates are formed in the upper half of a through hole. FIG. 12 (a) is an enlarged view of a part of a forming plate on which the guide plates are formed. FIG. 12B is a front view showing a tube element having a guide plate and a tube element stacked downstream from the tube element, and illustrating the shape of the guide plate and the flow of the heat exchange medium.

FIG. 13 is a view showing a configuration example in which a plurality of guide plates are formed in the entire through hole; FIG. 13A is a front view in which a part of a forming plate in which the guide plates are formed is enlarged; FIG. 13B is a diagram illustrating a tube element having a guide plate and a tube element stacked downstream of the tube element, and illustrating the shape of the guide plate and the flow of the heat exchange medium.

FIG. 14 is a diagram showing an example of a configuration in which a half guide plate having a through hole is made horizontal in the configuration of FIG. 13;
4 (a) is an enlarged front view of a part of a forming plate on which a guide plate is formed, and FIG. 14 (b) shows a tube element having a guide plate and a tube element laminated downstream thereof. FIG. 3 is a diagram illustrating the shape of a guide plate and 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 view showing an end face of the stacked heat exchanger which is perpendicular to the ventilation direction.

16 (a) is a diagram showing a side surface of the laminated heat exchanger shown in FIG. 15, and FIG. 16 (b) is a diagram showing a bottom surface of the laminated heat exchanger shown in FIG. is there.

FIG. 17 is an enlarged front view of a part of a forming plate in which a guide plate and a partition are integrally formed.

FIG. 18 shows two adjacent tube elements.
It is a figure which shows the structure which provided the guide plate in the location and made the guide plates contact, and the inclined part was continued.

FIG. 19 shows two adjacent tube elements.
It is a figure which shows the state which provided the guide plate in the location and formed the space | interval of these guide plates.

FIG. 20 (a) is a conceptual diagram illustrating the flow of a heat exchange medium in a conventional four-pass type laminated heat exchanger having a heat exchange medium entrance / exit portion at one end in the stacking direction of a core body. FIG. 20 (b) is a conceptual diagram illustrating the flow of a heat exchange medium in a conventional six-pass stacked heat exchanger.

FIG. 21 (a) is a characteristic diagram showing the temperature of air passing through the upper part of the stacked heat exchanger of the first embodiment (representative temperature of air passing through the upper half between tube elements). FIG. 21B 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 DESCRIPTION OF SYMBOLS 17 Through-hole 18 Partition part 19 Guide plate 19a Bridge part 19b Inclined part 21 1st tank block 22 2nd tank block 23 3rd tank block 30 Communication pipe

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Kunihiko Nishita Inventor 39 Term Higashihara, Chiyo-ji, Odai-gun, Osato-gun, Saitama Prefecture F term (reference) 3L103 AA01 AA05 AA17 AA17 BB38 DD15 DD17 DD54 DD55 DD58

Claims (10)

[Claims] 1. A tank element having a plurality of tank sections and a passage section communicating with the tank sections, the tank sections are sequentially attached to each other and stacked in multiple stages, and all or all of the attached tank sections are stacked. A part is communicated through a through hole formed in each tank part, and a path for flowing a heat exchange medium from a plurality of connected tank parts to a passage part communicating therewith is provided, and at a transition part to this path In the stacked heat exchanger for moving the heat exchange medium in the stacking direction through the through-holes, the flow of the heat exchange medium moving in the stacking direction is transferred to the transition portion or at least one location in the vicinity thereof at the transfer destination. A laminated heat exchanger comprising: a guide plate that is changed toward a communication portion between a tank portion and a passage portion communicating with the tank portion. 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,
The tank portions of adjacent tube elements are sequentially attached to each other, and the joined tank portions are communicated through the through holes for each block, and the number of tank portions constituting each block is appropriately set to allow passage from the tube element tank portion. And an even-numbered path in which the heat exchange medium flows from the passage portion of the tube element to the tank portion, and a transition from the even-numbered path to the odd-numbered path. In the laminated heat exchanger in which the heat exchange medium moves in the laminating direction through the through hole at a portion, the flow of the heat exchange medium moving in the laminating direction is transferred to the transition portion or at least one location near the transition portion by the odd number. A stacking heat exchanger provided with a guide plate which is changed toward a communicating portion between a tank portion of the second pass and a passage portion communicating therewith. . 3. The heat exchange by forming the tube element by joining two forming plates, and disposing a forming plate provided with a partition for preventing communication between the tanks in the laminating direction at a predetermined position. The guide plate provided at the transition portion, which bounds a path through which a medium flows from the tank portion to the passage portion, is provided on a forming plate adjacent to the forming plate provided with the partition portion. 1 or 2
A stacked heat exchanger as described. 4. The heat exchange by forming the tube element by joining two molding plates and disposing a molding plate provided with a partition for preventing communication between the tanks in the laminating direction at a predetermined position. The lamination mold according to claim 1 or 2, wherein a guide plate provided at the transition portion is provided on a forming plate provided with the partition portion, which bounds a path through which a medium flows from the tank portion to the passage portion. Heat exchanger. 5. The guide plate is inclined in a range of 5 to 65 degrees with respect to a laminating direction of the tube elements, and a length of the inclined portion is set in a range of 1 to 15 mm. 4. The stacked heat exchanger according to any one of 4. 6. The heat exchanger according to claim 1, wherein the guide plate is formed integrally with a member constituting a tank portion. 7. The guide plate according to claim 1, wherein the guide plate includes an erect portion provided so as to pass through the through hole, and an inclined portion which is bent and inclined from a side edge of the erect portion. A stacked heat exchanger according to any one of the preceding claims. 8. The stacked heat exchanger according to claim 1, wherein the guide plate is inclined from a peripheral edge of the through hole. 9. The laminated heat exchange according to claim 1, wherein the guide plate is formed by twisting a portion provided so as to pass the through hole and inclining the entire portion. vessel. 10. The stacked heat exchanger according to claim 1, wherein a large number of the guide plates are formed at or near the transition portion.