JP2002147983A - Laminated heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the cost and the work man-hour and improve the heat exchange efficiency and the heat transfer ratio by eliminating the need of the conventional corrugated fins in a laminated heat exchanger composed of laminated tube elements, and avoid reducing the assembling or soldering workability of the tube elements to avoid lowering the strength between the tube elements. SOLUTION: Louvers 16 projecting outwards from a tube element 2 are formed integrally with a plate 6 constituting the tube element 2 at positions not interfering with passage forming recesses 8 for forming fluid passages. The louvers 16 can be substituted for the conventional corrugated fins, thereby increasing the heat exchanging area.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated heat exchanger which is used for a refrigeration cycle of a vehicle air conditioner and is constituted by laminating a large number of tube elements.

[0002]

2. Description of the Related Art In a laminated heat exchanger used as an evaporator of a refrigeration cycle, for example, as shown in Japanese Utility Model Laid-Open No. 7-12778, a recess for forming a passage and the formation of a passage following the recess are formed. A tube element having a fluid passage portion and a tank portion communicating with the fluid passage portion is formed by joining two formed plates integrally formed with a tank forming recess portion formed deeper than the tank forming recess portion. In many cases, the tube element has a basic structure in which the tube elements are stacked in a plurality of stages via fins. In order to reduce the cost and the number of processing steps, there has been proposed a structure in which a laminated heat exchanger is constituted only by tube elements without using fins (Japanese Patent Laid-Open No. 11-287580).

[0003] In this method, a projecting portion is formed on a forming plate constituting a tube element, and the projecting portion prevents a fluid flowing outside the tube element from moving straight, causing turbulent flow, and a flow direction of an external fluid and an internal fluid. Are orthogonal to each other.

[0004]

However, in the above-described laminated heat exchanger that does not use fins, the external fluid flowing between the tube elements is turbulent by the ejection portion, but the ejection portion is formed by the formation of the ejection portion. It is difficult to obtain a heat exchange area larger than that of a conventional heat exchanger having fins, and there is a concern that heat exchange efficiency with a fluid flowing outside and heat transfer coefficient may be deteriorated. Further, according to the above-mentioned publication, a configuration is shown in which the convex portion of the embossed portion and the plate of the adjacent tube element are assembled to face each other with a gap interposed therebetween. However, there is a concern that the assemblability and brazing property of each tube element may be reduced, and that the strength between the tube elements may be reduced.

Accordingly, the present invention aims to improve the heat exchange efficiency and the heat transfer coefficient in a laminated heat exchanger which does not require a conventional corrugated fin and can reduce costs and man-hours. Its primary purpose. Another object is to prevent a decrease in the assemblability and brazing properties of the tube elements and to prevent a decrease in strength between the tube elements.

[0006]

In order to achieve the above object, a laminated heat exchanger according to the present invention comprises two molded plates each having a passage-forming recess and a tank-forming recess formed following the recess. Tanks communicating with the fluid passage portion by the passage forming recesses of the respective forming plates facing each other, and the fluid passage portion by the tank forming recesses of the respective forming plates facing each other. The tube elements are formed in a plurality of stages, and the adjacent tube elements are abutted by the tank portions, and all or a part of the abutted tank portions are passed through. The tube element is connected to a hole of the forming plate so as not to interfere with the passage forming recess. The louvers of the outwardly projecting is characterized in that so as to form integrally (claim 1).

A tube element in which two molding plates each having a passage-forming recess formed thereon are joined face-to-face, so that a fluid passage portion is formed by the passage-forming recesses of each molding plate that face each other. In the laminated heat exchanger configured by assembling a large number of the tube elements with a tank formed of a member different from the molding plate, the tube heat element does not interfere with the passage forming recesses of the molding plate. A louver protruding outside the tube element may be integrally formed at a location (claim 2).

Therefore, in a laminated heat exchanger in which the tank is formed integrally with the tube element, or in a laminated heat exchanger in which the tank is formed separately from the tube element, the molding plate constituting the tube element is Since the louver is formed integrally at a location where it does not interfere with the passage forming recess, the louver can be used as a substitute for a conventional corrugated fin and the heat exchange area can be increased.
The above object can be achieved.

Here, adjacent tube elements are:
It is preferable that the louvers formed on the molding plate are joined to each other by abutting each other (claim 3). With such a configuration, good assembling property and brazing property of the tube element can be ensured, and The strength between the tube elements can be secured.

Further, as the tube element, a passage forming recess is formed along the longitudinal direction of the forming plate,
Even if the tank forming recesses are formed at both ends in the longitudinal direction of the forming plate to form tank portions communicating with the both ends by the fluid passages (claim 4), the passage forming recesses are formed in the longitudinal direction of the forming plate. The tank portion may be formed along the direction, and the tank forming recess may be formed only at one end in the longitudinal direction of the forming plate, and the tank portion communicating with the fluid passage portion may be formed only at one end. Claim 5).

In particular, in order to enhance the heat exchange efficiency, a plurality of rows of louvers are formed in the forming plate in a row in the longitudinal direction, and a plurality of recesses for forming the passage extending in the longitudinal direction are formed. Preferably, a group of louvers in a line are alternately formed in the short direction of the forming plate.

Further, in order to promote the heat exchange performed through the louvers, a plurality of rows of louvers are formed in the forming plate in the longitudinal direction, and a group of louvers in the adjacent row is formed in the longitudinal direction of the forming plate. It may be formed so as to be shifted in the direction (claim 7).

Further, in the laminated heat exchanger in which the tank is integrally formed with the tube element, an inlet part into which the heat exchange medium flows and an outlet part out of which the heat exchange medium flows are provided in the outermost tube element laminated. However, when the one-way flow from or to the tank portion is counted as one pass, the concave portion for forming the tank is formed by forming the concave portion for forming the tank in order to constitute the flow of the heat exchange medium in a plurality of passes. By forming a pair in the short direction of the plate, the tank portion may be formed in a pair in the short direction of the tube element. Further, in order to improve the temperature distribution of the heat exchanger, the heat exchange medium may be moved from one of the paired tank portions to the other at the lamination end. On the other hand, in the case of a laminated heat exchanger of a separate tank type in which the tank and the tube element are separate bodies, the tank is formed in pairs in the short direction of the tube element, and the pair is formed at the laminated end. The heat exchange medium may be moved from one side of the tank to the other side.

The louver may be a parallel louver formed parallel to the ventilation direction, or an inclined louver formed at a predetermined angle to the ventilation direction. (Claims 12 and 13).

In particular, in the case of the laminated heat exchanger having the above-described structure, the width of the tube element in the width direction is set to 25 to 47 m in order to obtain heat exchange performance equal to or higher than the conventional one.
m can be set (claim 14).
Further, it is possible to set the thickness of the tube element at the portion where the fluid passage portion is formed in a range of 1.5 to 2.7 mm (claim 15).

[0016]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2, a laminated heat exchanger 1 has a core body formed by laminating a plurality of tube elements 2 in a plurality of stages, and an inlet 4 and an outlet of a heat exchange medium at one end of the tube element 2 in the laminating direction. 5 is provided, for example, a 4-pass evaporator. Except for the tube elements 2a and 2b at the ends in the stacking direction and the tube element 2c at the substantially center, each tube element 2 has a molding plate 6 shown in FIG. It is constituted by two sheets facing each other.

The forming plate 6 is formed by pressing an aluminum plate, and has a plurality of passage forming recesses 8 extending in the longitudinal direction formed on the surface thereof in parallel at predetermined intervals. In addition, a tank forming recess 9 is formed at both ends following the passage forming recess 8. Tank forming recess 9 formed at each end
Are formed in pairs in the short direction (ventilation direction) of the forming plate 6, and the passage forming recess 8 is correspondingly formed with a ridge 10 formed substantially at the center of the forming plate.
Are divided into a plurality of passage forming recesses formed on one side in the short direction (ventilation direction) and a plurality of passage forming recesses formed on the other side.

Each of the recesses 9 for forming a tank is formed deeper than the recess 8 for forming a passage. The recess 9 for forming a tank has a through hole 11 formed therein. The joint margin formed on the peripheral edge of the forming plate 6 from the space between the two tank-forming recesses 9 formed at the end of the plate to the space between the two tank-formed recesses 9 formed at the other end. 12 is formed.

As shown in FIG. 4, the tube element 2 is formed by combining the above-mentioned two forming plates 6 with each other.
The recess for forming a passage and the recess for forming a tank are joined to face each other so as to face inward, and a plurality of fluid passage portions 13 that are elongated and extend parallel to each other are formed by the facing recesses for forming a passage of the forming plate 6. The tank portion 14 communicating with the fluid passage portion 13 is formed by the tank forming concave portions 9 of the forming plate 6 facing each other. Therefore, in this example, each of the pair of tank portions 14 formed at both ends is provided with one of the ridges 1.
The other of the paired tank portions 14 formed at both ends thereof are separated by the ridge 10 and communicate with each other through the plurality of fluid passage portions 13 on one side in the short direction divided by 0. A plurality of fluid passages 13 on the other side in the short direction
It is designed to communicate via.

Between the adjacent passage forming recesses 8 formed in the molding plate 6 and on both sides of the protrusions 10, the protrusions 1 are provided.
A louver forming margin 15 formed on the same plane as the first and second joining margins 12 is formed in a belt shape along the longitudinal direction of the forming plate.
A group of louvers 16 is formed in a row in the longitudinal direction. That is, a plurality of passage forming recesses 8 are formed in the forming plate 6 in the longitudinal direction, and a plurality of louver forming margins 15 having a large number of louvers 16 regularly formed at predetermined intervals (pitch) are formed. The recesses 8 for forming passages and the allowances 15 for forming louvers are alternately formed in the short direction of the forming plate 6.

As shown in FIG. 5, each louver 16 is formed so as to project in the same direction as the direction in which the passage forming recess 8 projects from the louver forming allowance 15, and It is formed so as to protrude outside the concave portion 8, and flows in the ventilation direction (ie, the short direction of the forming plate 6).
And are formed so as to be substantially parallel to.

That is, the louver 16 is formed so as to be substantially parallel to the louver formation allowance 15, and formed on both sides of the top 16 a, and is erected from the louver formation allowance 15. The top portion 16a is formed so as to protrude outward from the passage forming recess so as to be flush with the tank forming recess 9 so as to be flush with the tank forming recess 9. Further, each of the upright portions 16b and the top portions 16a are formed substantially parallel to the ventilation direction. Therefore, the air can move in the short direction of the forming plate 6 through the space surrounded by the standing portion 16b and the top portion 16a. Further, a through hole 17 is formed in a portion of the louver formation allowance 15 facing the top portion 16a, and air can move through the through hole 17.

The louvers 16 are integrally formed together with the passage forming recesses 8 and the tank forming recesses 9 by press molding.
The louvers 16 are formed so as to be shifted in the longitudinal direction of the forming plate 6 with respect to the adjacent louvers for forming the louvers. In this configuration example, when the molded plate is viewed from the front, as shown in FIG.
Except for the louvers formed on both sides of 0, the louvers 16 of the adjacent louver formation allowances 15 are formed in a state shifted in the longitudinal direction by half (1/2 pitch) of the louver formation interval. That is, when viewed from the ventilation end face of the heat exchanger, an adjacent louver for forming a louver is arranged between louvers for forming a louver formed in the front.

On the other hand, in the tube element 2a at the end in the stacking direction, the inlet 4 and the outlet 5 are formed at one end (upper end in the figure) of the forming plate 6 shown in FIG. Further, the tube element 2c substantially at the center is connected to the forming plate 6 shown in FIG. 3 at one end (the upper end in the figure). The forming plate 19 shown in FIG. 8 in which the through hole 11 is formed only in the tank forming recess 9 at the other end (the lower end in the drawing) without forming the through hole in the tank forming recess 9. Are combined. Note that the other configuration is the same as the configuration of the tube element 2, and the description is omitted.

A partition A for blocking communication of the tank portion 14 in the laminating direction is formed by a non-communicating portion of the forming plate 18 where no through hole is formed. The partition portion A may be configured to close a through hole communicating between the tank portions with a blind plate interposed between the forming plates of the adjacent tube elements.

The tube element 2b provided at the other end in the laminating direction where the inlet portion 4 and the outlet portion 5 are not formed is connected to the forming plate 6 shown in FIG. 3 and the communicating plate 20 shown in FIG. It is configured. The communication plate 20 is formed to have a size corresponding to the outer shape of the forming plate 6, and has a communication passage forming recess 21 bulging in a bowl shape at one end (the upper end in the figure). Is formed. The communication passage forming recess 21 covers two paired tank forming recesses 9 formed at one end (upper end in the figure) of the forming plate 6 constituting the tube element 2b. The communication passage forming recess 21 forms a communication passage 22 for moving the heat exchange medium from one tank portion to the other tank portion in the short direction of the tube element 2c.
The other end (lower end in the figure) of the communication plate 20 is formed flat, and the other end (lower end in the figure) of the forming plate 6 constituting the tube element 2b. ), The two tank forming recesses 9 forming a pair are closed.

The respective tube elements 2, 2a, 2b, 2c are abutted against each other by the tank portions 14, and as shown in FIG. 10, adjacent tube elements (in FIG. 10, for convenience, ordinary The louvers formed on the forming plate 6 are abutted with each other in a state where the tube element 2 is joined), and the butted tank portion and the louver 16 are joined by brazing. Therefore, in such a configuration example, two tank groups extending in the laminating direction (perpendicular to the ventilating direction) are formed on the upper side in the back-and-forth direction, and each tank group has a substantially central portion in the laminating direction. Except for the above, the tank portion 14 is communicated via a through hole 11 formed in the molding plate. Further, also on the lower side, two tank groups extending in the stacking direction (perpendicular to the ventilation direction) which are front and rear in the ventilation direction are formed, and each tank group is formed with a through hole formed in the forming plate without being partitioned. All the tank parts are communicated with each other through 11.

Therefore, as shown in FIG. 11, the refrigerant flowing from the inlet portion 4 is dispersed and enters the tank portion up to the partition portion (the portion indicated by A in the figure) of one of the upper tank groups. Then, each of the fluid passages communicating therewith is lowered to enter one of the lower tank groups (first pass). Then, it moves in the stacking direction toward the remaining tube elements constituting the lower one tank group, ascends the fluid passage portion of the tube element, and leads to the remaining tank portions of the upper one tank group. (2nd pass). After that, it is dispersed into the tank portion up to the partition portion A of the other upper tank group through the communication passage 22 formed at the stacking end portion, and the respective fluid passage portions communicating with this are lowered, and the lower Enter the other tank group (third pass). Then, it moves in the laminating direction toward the remaining tube elements constituting the other lower tank group, raises the fluid passage portion of the tube element (fourth pass), and moves the remaining upper tank group of the other upper tank group. And then flows out of the outlet 5. For this reason, the heat exchange medium exchanges heat with the air passing therethrough via the louver 16 in the process of flowing through the fluid passage 13 forming the first to fourth passes.

That is, the portion of the forming plate that constitutes each tube element, avoiding the passage forming recess 8, that is,
The louver 16 formed at a position that does not interfere with the passage forming recess 8 can be used as a substitute for the conventional corrugated fin, so that a fin made of a separate member can be eliminated and the number of components of the heat exchanger can be reduced. Since the louver 16 can be integrally formed by pressing at the time of forming the forming plate,
It is possible to reduce the number of assembly steps and the manufacturing cost of the heat exchanger. Further, the adjacent tube elements are joined by abutting the louvers 16 of the forming plate facing each other, so that sufficient strength between the tube elements can be secured.

Further, since the louver 16 is formed on the forming plate, the heat exchange area can be increased, and the flow of the fluid flowing outside the tube element can be positively disrupted. Thus, the heat transfer coefficient can be improved. Moreover,
Since the louver 16 is formed integrally with the forming plate, there is no need to worry about the contact state between the forming plate and the louver 16, and from this point, the heat exchange efficiency and the heat transfer coefficient can be improved. become able to.

Therefore, since the heat exchange performance can be improved, the width of the tube element 3 in the ventilation direction can be reduced accordingly. In this example, a heat exchange performance equal to or higher than the conventional one can be obtained. To achieve this, the thickness of the portion of the tube element where the fluid passage portion 13 is formed is set in the range of 1.5 to 2.7 mm, and the width of the tube element in the short direction, that is, the width in the ventilation direction is 25. ~ 47m
m.

In the above-described configuration example, the case of four passes in which the number of times the heat exchange medium moves between the tank portions is four times has been described. However, by appropriately changing the formation position of the partition portion A, etc. Various stacked heat exchangers can be constructed.

That is, as shown in FIG. 12, the partition A provided in the upper tank group is shifted in position between the one tank group and the other tank group which are arranged back and forth in the ventilation direction, thereby providing the same. Even with four passes, the temperature distribution of the heat exchanger is adjusted, and a uniform temperature distribution can be obtained. In this case, two predetermined middle tube elements are added to the forming plate 6 shown in FIG. 3 at one end as shown in FIG. 13 with respect to the stacked heat exchanger shown in FIG. It is preferable to assemble and form a forming plate 25 in which a through hole 11 is formed only on one side at a portion (upper end in the figure).

Further, as shown in FIG. 14, the partition A provided in the upper tank group is formed only in one of the tank groups that are arranged in front and rear in the ventilation direction, and is not provided in the other tank group. This makes it possible to construct a three-pass stacked heat exchanger. In this case, with respect to the stacked heat exchanger shown in FIG. 1, the tube element 2a at the stacked end is connected to the forming plate 6 shown in FIG. (The upper end in the drawing), and the outlet 5 is formed at the other end (the upper end in the drawing).
A flat plate 26 formed on the lower end) is assembled, and the middle tube element 2c is attached to the forming plate 6 shown in FIG. 3 on one side of one end as shown in FIG. It is preferable to assemble a forming plate 25 having only the through hole 11 formed therein.

Further, without providing the partition A, as shown in FIG. 16, the heat exchange medium flowing from the inlet 4 is transferred from the upper one tank group to the lower one tank group. A two-pass stacked heat exchanger is constructed in which the lower tank group is transferred to the upper tank group through the communication path 22 provided below and then flows out from the outlet 5. It is also possible to do. In this case, the tube element 2c in the middle stage is also different from the stacked heat exchanger shown in FIG.
May be attached to each other, and the communication plate 20 may be mounted upside down.

In the above description, mainly the fluid passage 1
3 shows a configuration example in which the tube elements having the tank portions 14 formed on both ends thereof are laminated to form a laminated heat exchanger. In particular, when constructing a laminated heat exchanger having an even-numbered path, one of the tube elements is required. Are provided only at one end of the tank, and no tank is provided at the other end.
The configuration may be such that a pair of tank portions are communicated with each other by a fluid passage portion having a U-shape, and such a tube element having a tank portion on only one side may be laminated to form a laminated heat exchanger.

For example, in the case of constructing a stacked heat exchanger corresponding to two passes shown in FIG. 16, except for the tube element provided at the stacked end where the inlet 4 and the outlet 5 are formed, The tube element may be formed by joining two molding plates 27 shown in FIG. 17 face to face.

The forming plate 27 used here is also formed by pressing an aluminum plate, and has one end (upper end in the drawing) having two bowl-shaped pairs. A tank forming recess 9 is formed, and a ridge 10 is formed from between the two tank forming recesses 9 to the vicinity of the other end of the forming plate 27, and in the longitudinal direction following each tank forming recess 9. A plurality of passage forming recesses 8 extending along the other end (the lower end in the figure) of the forming plate 27 are formed so as to be integrated. A protruding piece 30 is formed on the other end of the forming plate 27 so as to protrude outwardly in order to obtain a good assembly state with the adjacent tube element.

Also in this example, each tank forming recess 9 is formed deeper than the passage forming recess 8, and a through hole 11 is formed in this tank forming recess 9. The ridge 10 is formed following the joining margin 12 formed on the peripheral edge of the molding plate 27, and the louver formation margin 15 is formed with a large number of louvers 16 similar to the above-described configuration example. The other configuration is the same as the forming plate 6 shown in FIG.
Since the configuration is the same as that described above, the same portions are denoted by the same reference numerals and description thereof is omitted.

Therefore, such a forming plate 27
In the tube element 2 which is formed by joining two sheets of the passage forming recess 8 and the tank forming recess 9 facing each other inward, the tank forming recesses 9 of the forming plate 27 face each other. A pair of tank portions is formed, and the passage forming recesses 8 of the forming plate 27 oppose each other to form a fluid passage portion having a U-shape as a whole communicating between the tank portions.

Further, in the tube element 2a provided at the lamination end where the inlet 4 and the outlet 5 are formed, the inlet 4 and the outlet 5 shown in FIG. In the tube element 2b provided at the other end in the laminating direction where the inlet portion 4 and the outlet portion 5 are not formed, A flat plate 28 having no through holes as shown in FIG. 18 may be joined to the forming plate 27 shown in FIG.

In the above description, the stack type heat exchanger having a specific number of passes has been described. However, as the positions of the inlet and outlet, the position of the partition A, the number of passes, and the like are changed, the forming plate and the flat plate are changed. It goes without saying that the shape of the plate, the positions of the inlets 4 and the outlets 5, the number and positions of the through holes 11 may be appropriately changed and used.

Further, in the above-described configuration, as shown in FIG. 6, an example is shown in which the louvers 16 are formed by shifting the louvers 16 by 1/2 pitch in the longitudinal direction of the forming plate in adjacent louver forming margins. As shown in FIG. 20, the same louver 16 may be formed at a pitch shifted by 1/3 pitch in the longitudinal direction of the forming plate in the adjacent louver forming margin. Alternatively, as shown in FIG. Instead of using a louver, the louver is formed so as to be inclined with respect to the ventilation direction (in the above-described configuration example, the top portion 16a and the upright portion 16b are formed).
And inclined with respect to the ventilation direction.)
It may be an inclined louver.

Furthermore, in the above-described configuration, the fluid passage portion 13 is elongated in the longitudinal direction of the tube element.
8 to 10 of Japanese Patent Application Laid-Open No. 1-287580, and a louver as described above may be formed in a portion where the fluid passage portion is not formed.

The above-described laminated heat exchanger is an example of a tank-integrated heat exchanger in which a tank is formed integrally with a tube element. However, a laminated heat exchanger in which a tube element and a tank are formed separately is described. The same can be applied to a mold heat exchanger.

FIG. 21 shows an example of such a laminated heat exchanger 31.
Is composed of a pair of tanks 32, 32 and a number of laminated tube elements 33 communicating between these tanks. Each tube element 33 faces two formed plates 34 shown in FIG. It is configured by joining.

The forming plate 34 is formed by pressing an aluminum plate, and has a plurality of passage forming recesses 8 extending in the longitudinal direction on its surface.
Are formed in parallel at predetermined intervals, and at both ends of the passage forming recess 8, insertion portion forming recesses 35 are formed following the passage forming recess 8. The insertion portion forming recesses 35 formed at the respective ends are formed in pairs in the short direction (ventilation direction) of the forming plate 34, and the passage forming recesses 8 are correspondingly formed. A plurality of passage-forming recesses formed on one side in the lateral direction (ventilation direction) with respect to the ridge 10 formed substantially at the center of the plate 34 and a plurality of passage-forming recesses formed on the other side. And is divided into

Each of the recesses 35 for forming the insertion portion is formed at the same depth as the recess 8 for forming the passage, and the ridge 10 is provided with two recesses for forming the insertion portion formed at one end. It is formed following the joining margin 12 formed on the peripheral edge of the forming plate 6 from between 35 and between two insertion portion forming recesses 35 formed at the other end.

Then, such a tube element 3
As shown in FIG. 23 (b), 3 is formed by face-to-face joining of the two forming plates 35 so that the passage forming recess 8 and the insertion section forming recess 35 face each other inward. The plurality of fluid passages 1 extending elongated and parallel by the opposed passage forming recesses 8 of the molding plate 34.
3 is formed, and an insertion portion 36 communicating with the fluid passage portion 13 is formed by the insertion portion forming recessed portions 35 of the molding plate 34 facing each other. Therefore, in this example, one of the paired insertion portions 36 formed at both ends communicates with each other through the plurality of fluid passage portions 13 on one side in the short direction divided by the ridges 10. The other one of the pair of insertion portions 36 formed at both ends is communicated with each other through the plurality of fluid passage portions 13 on the other side in the short direction divided by the ridges 10. .

A louver forming margin 15 formed on the same plane as the ridge 10 and the joining margin 12 is provided between the adjacent passage forming recesses 8 formed on the molding plate 34 and on both sides of the ridge 10. Are formed in a strip shape along the longitudinal direction of the forming plate 34, and a group of louvers 16 shown in FIG. That is, the forming plate 34
Has a plurality of passage forming recesses 8 formed in its longitudinal direction, and a plurality of louver forming margins 15 having a large number of louvers 16 regularly formed at predetermined intervals (pitch). The concave portions 8 for use and the louver formation allowances 15 are alternately formed in the short direction of the forming plate 34. Note that the shape of the louver 16 is the same as that of the above-described configuration example, and a description thereof will be omitted.

Each tank 32 has, for example,
A pair of tank forming members 32b each having a circular cross section extending in the stacking direction are arranged and joined in the airflow direction (transverse direction of the tube element) to the tank forming member 32a formed in a flat plate shape extending in the stacking direction. For example, in the case of a heat exchanger constituting a four-pass flow, a pair of tanks 32 provided on one side of the tube element 33 (the lower tank in FIG. 21) Are closed by a closing member (not shown), and a pair of tanks 32 provided on the other side of the tube element 33.
The middle part of the tank (upper tank in FIG. 21) is partitioned by a partition member (not shown), and the inlet 4 is provided at the end of one of the pair of tanks provided on the other side.
An outlet 5 is provided at the end of the other tank, and a communication passage 22 for moving the heat exchange medium from one tank to the other at the stacking end of the heat exchanger.
For example, by joining another member between both tanks.

Then, each tube element 3
3 is assembled to the tank 32 by inserting the insertion portion 36 into a tube insertion hole 37 formed in the tank forming member 32a and joining it by brazing or the like.
The adjacent tube elements 33 and the louvers 16 formed on the forming plate 34 are abutted against each other, and the abutted louvers 16 are joined by brazing or the like to be laminated.

Therefore, even in such a configuration,
Forming plate 34 constituting each tube element 33
By using the louver 16 formed at a place avoiding the passage forming recess 8, that is, at a place that does not interfere with the passage forming recess 8, the conventional corrugated fin can be used as a substitute. And the heat exchanger components can be reduced,
Further, since the louver 16 can be integrally formed by press working when the forming plate 34 is formed, it is possible to reduce the number of assembling steps and the manufacturing cost of the heat exchanger. Furthermore, the adjacent tube elements 33 are
Since the louvers 16 of the forming plate 34 facing each other are abutted and joined, sufficient strength between the tube elements can be ensured.
By forming the louver 16, the heat exchange area can be increased and the flow of the fluid flowing outside the tube element can be positively disturbed, so that the heat exchange efficiency and the heat transfer coefficient can be improved. You can plan. In addition, since the louver 16 is formed integrally with the molding plate, the molding plate and the louver 1 are formed.
It is not necessary to worry about the state of contact with 6, and from this point the heat exchange efficiency and the heat transfer coefficient can be improved. .

In the above-described structure of the separate tank, the tank 32 is not limited to the above-described structure. For example, as shown in FIG. 24, a pipe-shaped tubular member 32c formed by extrusion or the like may be used. Even if it is configured separately by being arranged side by side in the ventilation direction, the tube element can have another configuration such as integrally forming a pair of tanks arranged side by side in the short direction (ventilation direction) of the heat exchanger. 33 may be configured separately. Another modification of the above-described heat exchanger, that is, a configuration in which a pair of tanks is provided only at one end of the tube element and the fluid passage portion is formed in a U-shape, or the adjacent louver forming margin 15 is formed. , The louver 16 is displaced in the longitudinal direction of the forming plate, the shape of the louver, the dimensions of the heat exchanger (the thickness of the portion of the tube element where the fluid passage 13 is formed, the width of the tube element in the transverse direction, etc.) ), The shape of the fluid passage portion and the like can be configured in the same manner as the above-described tank-integrated heat exchanger, so the description thereof is omitted.

[0055]

As described above, according to the laminated heat exchanger according to the present invention, the molding plate constituting the laminated tube element is provided with the outer side of the tube element at a position which does not interfere with the passage forming recess. Since the louver is formed integrally with the fin, the louver can be replaced with a conventional corrugated fin and the heat exchange area can be increased. Is not required, cost and processing man-hours can be reduced, and heat exchange efficiency and heat transfer coefficient can be improved.

If adjacent tube elements are joined by abutting the louvers formed on the forming plate with each other, it is possible to prevent the tube elements from having good assembling and brazing properties. Also, the strength between the tube elements can be increased.

Further, a plurality of louvers in a row in the longitudinal direction are formed on the forming plate, and a plurality of recesses for forming the passage extending in the longitudinal direction are formed. A group of louvers in a row with the recess for the passage forming are formed. By forming the louvers alternately in the short direction of the forming plate, the louvers can be arranged in the vicinity of the recess for forming the passage, and the heat exchange efficiency can be improved. If a group of louvers in a row is formed in a plurality of rows, and a group of louvers in an adjacent row is formed to be shifted in the longitudinal direction of the forming plate, heat exchange performed via the louvers can be promoted. It becomes possible.

[Brief description of the drawings]

FIG. 1 is a front view of a laminated heat exchanger according to the present invention, in which a part of an outer shape is omitted.

FIG. 2 is a plan view of the stacked heat exchanger shown in FIG.

FIG. 3 shows a forming plate used for a tube element of the laminated heat exchanger of FIG. 1, and FIG.
Is a front view thereof, and FIG. 3B is a side view thereof.

4 shows a tube element of the laminated heat exchanger of FIG. 1, FIG. 4 (a) is a front view thereof, and FIG. 4 (b).
Is a side view thereof.

FIG. 5 is an enlarged perspective view showing a passage forming concave portion and a louver formed in a forming plate.

FIG. 6 is a diagram for explaining a louver formation state.

FIG. 7 shows a flat plate used for a tube element provided with an inlet and an outlet, and FIG.
FIG. 7A is a front view thereof, and FIG. 7B is a side view thereof.

FIGS. 8A and 8B show a forming plate provided with a partition portion A, FIG. 8A is a front view thereof, and FIG. 8B is a side view thereof.

FIG. 9 shows a communication plate, and FIG.
FIG. 9B is a front view thereof, and FIG. 9B is a side view thereof.

FIG. 10 is an explanatory diagram illustrating a state where the tube elements are joined to each other.

FIG. 11 is a view for explaining the flow of a refrigerant in a four-pass stacked heat exchanger, and FIG. 11 (a) is a perspective view thereof;
FIG. 11B is a plan view thereof.

FIG. 12 is a cross-sectional view of a four-part structure formed by shifting a partition part A;
It is a figure explaining the flow of the refrigerant | coolant of the lamination type heat exchanger of a path | pass, FIG.12 (a) is the perspective view, FIG.12 (b) is the top view.

FIG. 13 shows a forming plate used for a partition part of the laminated heat exchanger shown in FIG. 12, and FIG.
Is a front view thereof, and FIG. 13B is a side view thereof.

FIG. 14 is a view for explaining the flow of a refrigerant in a three-pass stacked heat exchanger, and FIG. 14 (a) is a perspective view thereof;
FIG. 14B is a plan view thereof.

15 shows a flat plate provided with an inlet and an outlet of the stacked heat exchanger shown in FIG. 14, and FIG.
(A) is a front view thereof, and FIG. 15 (b) is a side view thereof.

FIG. 16 is a diagram illustrating the flow of a refrigerant in a two-pass stacked heat exchanger, and FIG.
FIG. 16B is a plan view thereof.

FIG. 17 shows another configuration of the forming plate used for the tube element. FIG. 17 (a) is a front view thereof, and FIG. 17 (b) is a side view thereof.

FIG. 18 shows a flat plate provided at an end portion of the stacked heat exchanger. FIG. 18 (a) is a front view thereof, and FIG. 18 (b) is a side view thereof.

FIG. 19 is a diagram illustrating another state of forming the louver.

FIG. 20 is a diagram illustrating still another louver formation state.

FIG. 21 is a partially omitted front view showing another configuration example of the stacked heat exchanger according to the present invention.

FIG. 22 shows a forming plate used for a tube element of the laminated heat exchanger of FIG. 21;
(A) is the front view, FIG.22 (b) is the side view.

FIG. 23 is a view showing an assembled state of the tube element and the tank in the laminated heat exchanger of FIG. 21. FIG. 23 (a) shows the tube element viewed from a direction perpendicular to the ventilation direction. FIG. 22 (b) is a diagram showing the assembled state in which only the tank is cut out, and FIG. 22 (b) is a diagram showing the assembled state in which only the tank is cut out when the tube element is viewed from the ventilation direction.

FIG. 24 shows an assembled state of the tube element and the tank when the tube element is viewed from a direction perpendicular to the ventilation direction in the stacked heat exchangers having different tank configurations, with only the tank cut away. FIG.

[Explanation of symbols]

 1, 31 Stacked heat exchanger 3, 3a, 3b, 3c Tube element 4 Inlet 5 Outlet 6, 19, 25, 27 Molding plate 8 Passage forming recess 9 Tank forming recess 11 Through hole 13 Fluid passage 14 Tank part 15 Louver formation allowance 16 Louver 21 Communication part 22 Communication passage 32 Tank 33 Tube element 34 Mold plate 36 Insertion part

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (Reference) F28F 9/22 F28F 9/22

Claims (15)

[Claims] The present invention is characterized in that two molding plates each having a passage-forming recess and a tank-forming recess following the passage-forming recess are joined face-to-face. A fluid passage portion is formed, and a tube element is formed such that a tank portion communicating with the fluid passage portion is formed by the tank forming recesses facing each other of the respective forming plates. A stacked heat exchanger in which the adjacent tube elements are abutted by the tank portions, and all or a part of the abutted tank portions communicate with each other through a through hole. A louver protruding outside the tube element may be integrally formed at a location that does not interfere with the passage forming recess. Laminated heat exchanger, characterized in that the. 2. A fluid passage portion is formed by joining two molding plates, each having a passage forming recess formed thereon, face to face, and the passage forming recesses of each forming plate facing each other. In a laminated heat exchanger having a tube element and configured by assembling a large number of the tube elements to a tank formed of a member different from the forming plate, the passage-forming concave portion of the forming plate; A laminated heat exchanger, wherein a louver protruding outward from the tube element is integrally formed at a location where no interference occurs. 3. The stacked heat exchanger according to claim 1, wherein adjacent tube elements are joined by abutting the louvers formed on the forming plate. 4. The recess for forming a passage is formed along a longitudinal direction of the forming plate, and the recess for forming a tank is formed at both ends in a longitudinal direction of the forming plate. The stacked heat exchanger according to claim 1. 5. The method according to claim 1, wherein the recess for forming a passage is formed along a longitudinal direction of the forming plate, and the recess for forming a tank is formed only at one end in the longitudinal direction of the forming plate. The stacked heat exchanger according to claim 1, wherein 6. The molding plate is formed with a plurality of rows of the louvers in a row in the longitudinal direction and a plurality of recesses for forming a passage extending in the longitudinal direction. The stacked heat exchanger according to claim 1, wherein the group of louvers in the row are alternately formed in a short direction of the forming plate. 7. The forming plate is formed with a plurality of rows of the louvers in a row in the longitudinal direction, and the group of louvers in the adjacent row is formed so as to be shifted in the longitudinal direction of the forming plate. The stacked heat exchanger according to claim 1 or 2, wherein: 8. The stacked heat exchanger according to claim 1, wherein an inlet portion through which the heat exchange medium flows and an outlet portion through which the heat exchange medium flows out are provided on the outermost tube element. 9. The method according to claim 9, wherein the tank forming recesses are formed in pairs in the short direction of the molding plate, so that the tank portions are formed in pairs in the short direction of the tube element. The stacked heat exchanger according to claim 4 or 5, wherein 10. The stacked heat exchanger according to claim 9, wherein a heat exchange medium is moved from one side of the pair of tank sections to the other at the stacked end. 11. The tank is formed as a pair in the short direction of the tube element, and a heat exchange medium is moved at one end of the stack from one of the paired tanks to the other. The stacked heat exchanger according to claim 2, wherein 12. The stacked heat exchanger according to claim 1, wherein the louver is formed in parallel with a ventilation direction. 13. The stacked heat exchanger according to claim 1, wherein the louver is formed to be inclined at a predetermined angle with respect to a ventilation direction. 14. The stacked heat exchanger according to claim 1, wherein the width of the tube element in the short direction is set in a range of 25 to 47 mm. 15. The stacked heat exchanger according to claim 1, wherein a thickness of a portion of the tube element where the fluid passage is formed is set in a range of 1.5 to 2.7 mm. .