JP2008138987A - Heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact heat exchanger for improving the heat exchanging efficiency of heat exchanger units by suppressing heat transfer between band tubes. <P>SOLUTION: The first heat exchanger unit 2 and the second heat exchanger unit 3 are built up at two stages in the band cross direction of the band tubes 2a, 3a. On the one-end side in the extending direction of the band tubes 2a, 3a, a common header 4 is provided to be used for the first heat exchanger unit 2 and the second heat exchanger unit 3 in common so that the band tubes 2a of the first heat exchanger unit 2 and the band tubes 3a of the second heat exchanger unit 3 are arranged alternately in the laminating direction of the band tubes 2a, 3a. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a heat exchanger in which two heat exchange units in which strip-like tubes and corrugated fins are alternately stacked are overlapped.

  Conventionally, heat exchange units each having alternating strip-shaped tubes and corrugated fins stacked in two stages in the band width direction and the heat of shifting the phase of the adjacent corrugated fins in the extending direction of the corrugated fins. Exchangers have been proposed. (For example, patent document 1).

In this conventional heat exchanger, the phases of the corrugated fins of the two heat exchange units are shifted in the extending direction, so that even when the side ends of adjacent fins are joined, point contact is established and two heat exchanges are performed. When there is a temperature difference between the units, heat transfer from one fin to the other fin can be suppressed.
JP-A-11-193997

  However, in the technique of Patent Document 1, since the strip tubes of the heat exchange units stacked in two stages are arranged in parallel, heat is transmitted between the two heat exchange units via these strip tubes. As a result, the heat exchange efficiency of each heat exchange unit is impaired. Further, when the strip tube is separated in the band width direction in order to avoid the heat transfer, there is a problem that the heat exchanger becomes large in the band width direction and becomes large.

  The present invention can improve heat exchange efficiency of each heat exchange unit by suppressing heat transfer between the strip tubes of the heat exchange units stacked in two stages, and can be made more compact. The purpose is to obtain a simple heat exchanger.

  The present invention relates to a flat belt-like tube (2a, 3a) that is stacked and arranged in parallel at intervals, and a corrugate that extends while detouring along the extending direction of the belt-like tube (2a, 3a) at each of the intervals. A heat exchanger (1, 2d, 3d) having first and second heat exchange units (2, 3) having fins (2d, 3d) stacked in two stages in the band width direction of the strip tubes (2a, 3a). 1A, 1B), the strip tube (2a) of the first heat exchange unit (2) and the strip tube (3a) of the second heat exchange unit (3) are laminated with the strip tubes (2a, 3a). The main feature is that they are arranged alternately in the direction.

  According to the present invention, by arranging the strip tubes of the first heat exchange unit and the strip tubes of the second heat exchange unit alternately in the stacking direction of the strip tubes, the strip tubes can be separated in the stacking direction. Since it can do, it can suppress that heat is transmitted between two heat exchange units via the said strip | belt-shaped tube, and can improve the heat exchange efficiency of each heat exchange unit. Moreover, since it is not necessary to provide a gap between the strip tube of the first heat exchange unit and the strip tube of the second heat exchange unit, the first heat exchange unit and the second heat exchange unit are adjacent to each other. And can be configured more compactly.

  Hereinafter, a heat exchanger according to an embodiment of the present invention will be described with reference to the drawings.

  (First Embodiment) FIG. 1 is a sectional view showing a heat exchanger according to a first embodiment of the present invention, and FIG. 2 is a perspective view of a shared header provided in the present embodiment.

  A heat exchanger 1 shown in FIG. 1 includes a first heat exchange unit 2 and a second heat exchange unit 3 that allow different media to flow through each other in the band width direction of the strip tubes 2a and 3a (X direction in FIG. 2). And a shared header 4 shared by the first heat exchange unit 2 and the second heat exchange unit 3 at one end side in the extending direction (Z direction in FIG. 2) of the strip tubes 2a and 3a. Is provided.

  The first heat exchange unit 2 includes a flat strip tube 2a that is stacked in parallel at a predetermined interval, and a corrugate that will be described later that extends while detouring along the extending direction of the strip tube 2a at each of the intervals described above. Similarly, the second heat exchange unit 3 includes a flat strip-shaped tube 3a that is stacked in parallel with a predetermined interval, and a strip tube 3a that extends in the extending direction of the strip-shaped tube 3a. And a later-described corrugated fin 3d that extends while making a detour.

  The strip tube 2a of the first heat exchange unit 2 and the strip tube 3a of the second heat exchange unit 3 are alternately arranged in the stacking direction of the strip tubes 2a and 3a (the Y direction in FIG. 2). Moreover, the band width direction edge part 2b by the side of the 2nd heat exchange unit 3 of the strip | belt-shaped tube 2a of the 1st heat exchange unit 2 and the strip | belt by the side of the 1st heat exchange unit 2 of the strip | belt-shaped tube 3a of the 2nd heat exchange unit 3 are shown. The width direction edge portion 3b is overlaid in the above stacking direction.

  The common header 4 is formed with a bottom plate member 5 in which slits 5a for inserting the strip-shaped tubes 2a and 3a are formed, and a recess 6a that is disposed opposite to the bottom plate member 5 and into which the longitudinal ends of the strip-shaped tubes 2a and 3a are fitted. The top plate member 6 is integrally coupled. Between the bottom plate member 5 and the top plate member 6, a flow path 2 c for a first medium (for example, a refrigerant) that circulates in the strip tube 2 a of the first heat exchange unit 2, and a strip shape of the second heat exchange unit 3. The flow passages 3c for the second medium (for example, engine cooling water) flowing through the tubes 3a are formed in an isolated state, and the slits 5a and the recesses 6a are alternately arranged in the stacking direction. . The flow path 2c for the first medium and the flow path 3c for the second medium are formed at both ends of the band-shaped tubes 2a and 3a in the band width direction (X direction in FIG. 2), that is, spaced apart in the band width direction. ing.

  In the first embodiment, the strip tube 2a of the first heat exchange unit 2 and the strip tube 3a of the second heat exchange unit 3 are arranged in the stacking direction of the strip tubes 2a and 3a (Y direction in FIG. 2). By arranging them alternately, the strip-like tubes 2a and 3a are separated in the laminating direction. In addition, the strip tube 2a of the first heat exchange unit 2 and the second heat exchange unit 3 are arranged adjacent to each other without providing a gap between the strip tubes 2a and 3a in the band width direction (X direction in FIG. 2). To do.

  In 1st Embodiment comprised in this way, by making another medium flow mutually through the 1st heat exchange unit 2 and the 2nd heat exchange unit 3, for example, the condenser and cooling water which cool a refrigerant | coolant are cooled. It can be applied to a system in which a radiator is overlapped in parallel. In addition, since the strip tubes 2a and 3a are separated in the stacking direction (Y direction in FIG. 2), when there is a temperature difference between the first heat exchange unit 2 and the second heat exchange unit 3, the strip tubes 2a and 3a are Heat transfer between the two heat exchange units 2 and 3 can be suppressed, and the corrugated fins 2d of the first heat exchange unit 2 and the corrugated fins 3d of the second heat exchange unit 3 are joined together. Even if it exists, since it becomes a point contact, the heat transfer from one fin to the other fin can also be suppressed. Thereby, each heat exchange efficiency of the 1st heat exchange unit 2 and the 2nd heat exchange unit 3 can be improved.

  In the first embodiment, there is no need to provide a gap between the strip tubes 2a and 3a in the band width direction (X direction in FIG. 2), so the first heat exchange unit 2 and the second heat exchange unit. 3 can be arrange | positioned in the adjacent state, and it can comprise more compactly.

  Furthermore, in the first embodiment, since the shared header 4 shared by the first heat exchange unit 2 and the second heat exchange unit 3 is provided, the number of parts can be reduced and the strip tubes 2a and 3a can be easily positioned. That is, it becomes easy to obtain an appropriate layout of the strip-like tubes 2a and 3a. Further, since the flow path 2c for the first medium and the flow path 3c for the second medium of the shared header 4 are separated from each other in the band width direction of the strip tubes 2a and 3a, the flow path for the first medium described above. Heat transfer between the flow path 3c and the second medium flow passage 3c can be suppressed, and also in this respect, the heat exchange efficiency of the first heat exchange unit 2 and the second heat exchange unit 3 can be improved. it can.

  In the first embodiment, the case where the first heat exchange unit 2 is used as a capacitor and the second heat exchange unit 3 is used as a radiator is illustrated as an example. However, the present invention is not limited to this. By connecting the 1 heat exchange unit 2 and the 2nd heat exchange unit 3 in series, it is applicable also to the system provided with two heat exchange units which let the same mediums, such as CO2 gas flow, for example.

  (Second Embodiment) FIG. 3 is a schematic view for explaining a heat exchanger according to a second embodiment of the present invention. In addition, 1 A of heat exchangers concerning this embodiment are provided with the component similar to the heat exchanger 1 concerning the said 1st Embodiment. Therefore, the same components are denoted by common reference numerals, and redundant description is omitted.

  In the heat exchanger 1 </ b> A of the present embodiment, the band width direction edge 3 b on the second heat exchange unit 3 side of the strip tube 2 a of the first heat exchange unit 2 and the strip tube 3 a of the second heat exchange unit 3. The edge part 3b in the band width direction on the 1 heat exchange unit 2 side overlaps in the stacking direction (X direction in FIG. 3) of the banded tubes 2a and 3a.

  Even in the second embodiment configured as described above, the same effects as those of the first embodiment described above can be obtained. Furthermore, in this 2nd Embodiment, the band width direction edge part 2b of the strip | belt-shaped tube 2a and the band width direction edge part 3b of the strip | belt-shaped tube 3a are overlapped by the lamination direction (X direction of FIG. 3). Since the corrugated fins 2d of the first heat exchange unit 2 and the corrugated fins 3d of the second heat exchange unit 3 can be separated and contact can be eliminated, heat transfer between the corrugated fins 2d and 3d can be further suppressed.

  (Third Embodiment) FIG. 4 is a schematic diagram for explaining a heat exchanger according to a third embodiment of the present invention. The heat exchanger 1B according to the present embodiment includes the same components as the heat exchanger 1 according to the first embodiment. Therefore, the same components are denoted by common reference numerals, and redundant description is omitted.

  In the heat exchanger 1 </ b> B of the present embodiment, the band width direction edge 2 b of the strip tube 2 a on the second heat exchange unit 3 side of the first heat exchange unit 2 and the strip tube 3 a of the second heat exchange unit 3. 1 The band width direction edge 3b on the heat exchange unit 2 side overlaps in the stacking direction of the band tubes 2a, 3a (X direction in FIG. 4), and the band width direction edges 2b, 3b are It has a wedge shape.

  Even in the third embodiment configured as described above, the same effects as those of the first embodiment described above can be obtained. Furthermore, in this 3rd Embodiment, since the corrugated fin 2d of the 1st heat exchange unit 2 and the corrugated fin 3d of the 2nd heat exchange unit 3 can be spaced apart and contact can be eliminated, between corrugated fins 2d and 3d Heat transfer can be suppressed. Moreover, the band width direction edge part 2b of the strip | belt-shaped tube 2a of the 1st heat exchange unit 2 is pointed in the wedge shape, and even when it joins with the side end of the corrugated fin 2d of the 2nd heat exchange unit 3, it becomes a point contact. Therefore, the heat transfer between the band width direction edge 2b of the band tube 2a and the corrugated fin 3d of the second heat exchange unit 3 can be suppressed, and similarly, the band width direction edge 3b of the band tube 3a and the second Heat transfer between the corrugated fins 2d of the one heat exchange unit 2 can be suppressed.

  In addition, in the said 3rd Embodiment, although the case where each band width direction edge part 2b, 3b of the strip | belt-shaped tubes 2a and 3a was pointed in the wedge shape was illustrated, this invention is not limited to this, Band width direction Any one of at least one of the end edges 2b and 3b may be sharp, for example, as shown in FIG. 5, each band width direction end edge 2b of the strip tubes 2a and 3a, By providing the protruding plate 7 protruding outward from 3b, heat transfer between the band width direction edge 2b of the band-shaped tube 2a and the corrugated fin 3d of the second heat exchange unit 3, and the band of the band-shaped tube 3a Heat transfer between the width direction edge portion 3b and the corrugated fin 2d of the first heat exchange unit 2 can be suppressed.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments, and various modifications can be made.

It is sectional drawing which shows the heat exchanger which concerns on 1st Embodiment of this invention. It is a perspective view of the common header used with the heat exchanger concerning a 1st embodiment. It is a schematic diagram which shows the heat exchanger which concerns on 2nd Embodiment of this invention. It is a schematic diagram which shows the heat exchanger which concerns on 3rd Embodiment of this invention. It is a schematic diagram which shows the modification of the strip | belt-shaped tube used with the heat exchanger which concerns on 3rd Embodiment of this invention.

Explanation of symbols

1, 1A, 1B Heat exchanger 2 First heat exchange unit 2a Band tube 2b Band width direction edge 2c Flow path 2d Corrugated fin 3 Second heat exchange unit 3a Band tube 3b Band width direction edge 3c Flow path 3d Corrugated fin 4 Common header 5 Bottom plate member 5a Slit 6 Top plate member 6a Recess 7 Projecting plate

Claims (8)

Flat strip tubes (2a, 3a) that are stacked and arranged in parallel at intervals, and corrugated fins (2d, 3d) that extend while detouring along the extending direction of the strip tubes (2a, 3a) at each of the intervals 3d), a heat exchanger provided with first and second heat exchange units (2, 3) having two stages stacked in the band width direction of the strip tubes (2a, 3a),
The strip tubes (2a) of the first heat exchange unit (2) and the strip tubes (3a) of the second heat exchange unit (3) are alternately arranged in the stacking direction of the strip tubes (2a, 3a). A heat exchanger characterized by that.   A band width direction edge (2b) on the second heat exchange unit (3) side of the band tube (2a) of the first heat exchange unit (2), and a band tube of the second heat exchange unit (3) 2. The heat exchanger according to claim 1, wherein the edge portion (3 b) in the width direction on the first heat exchange unit (2) side of (3 a) is overlapped in the stacking direction.   A band width direction edge (2b) on the second heat exchange unit (3) side of the band tube (2a) of the first heat exchange unit (2), and a band tube of the second heat exchange unit (3) 2. The heat exchanger according to claim 1, wherein an edge portion (3 b) in a band width direction on the first heat exchange unit (2) side of (3 a) is overlapped in the stacking direction. A common header (4) shared by the first and second heat exchange units (2, 3) is provided on one end side in the extending direction of the strip tubes (2a, 3a),
The shared header (4) is disposed so as to face the bottom plate member (5) having a slit (5a) through which the strip tubes (2a, 3a) are inserted, and the bottom plate member (5). , 3a) and a top plate member (6) in which a recess (6a) into which a longitudinal end portion is fitted is formed, and a structure integrally coupled,
Between the bottom plate member (5) and the top plate member (6), the flow path (2c) for the first medium that circulates in the strip tube (2a) of the first heat exchange unit (2), The second medium flow passage (3c) that circulates in the strip tube (3a) of the second heat exchange unit (3) is formed in an isolated state, and the slit (5a) and the recess ( The heat exchanger according to any one of claims 1 to 3, wherein 6a) are alternately arranged in the stacking direction.   The heat exchanger according to claim 4, wherein the first medium flow passage (2c) and the second medium flow passage (3c) are spaced apart from each other in the band width direction.   A band width direction edge (2b) on the second heat exchange unit (3) side of the strip tube (2a) of the first heat exchange unit (2), and a strip tube of the second heat exchange unit (3) Of at least one of the band width direction edge portions (3b) on the first heat exchange unit (2) side of (3a) is pointed. The heat exchanger as described in any one of them.   The first heat exchange unit (2) and the second heat exchange unit (3) allow different media to flow through each other. The described heat exchanger.   The said 1st heat exchange unit (2) and the said 2nd heat exchange unit (3) are what allows the same medium to flow through, The one of Claims 1-6 characterized by the above-mentioned. Heat exchanger.

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