JPH11173784A - Fin structure for integrated heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance heat blocking rate between two heat exchangers by forming a connecting part between first and second fins at a specified top or bottom part of a fin laminated alternately to a tube. SOLUTION: A corrugated aluminum alloy fin 6 comprises a first fin 61 interposed between the first tubes 5 of a first heat exchanger, and a second fin 62 interposed between the second tubes 9 of a second heat exchanger wherein the first and second fins 61, 62 are connected through a connecting part 63 at a specified interval. The connecting part 63 is formed continuously and periodically at the bottom part 66b. According to the structure, heat blocking performance between the first and second fins 61, 62 can be enhanced resulting in the enhancement of mechanical strength at the connecting part 63.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fin structure used for an integrated heat exchanger including a plurality of heat exchangers.

[0002]

2. Description of the Related Art The heat exchanger disclosed in Japanese Utility Model Publication No. 6-45155 is composed of first and second heat exchangers arranged in parallel with common fins. In this heat exchanger, a slit having a predetermined opening area is formed in a linear portion of the fin located between the first heat exchanger and the second heat exchanger. The heat conduction between the fin portion located on the side and the fin portion located on the second heat exchanger side is suppressed.

[0003] In addition, in the double integrated heat exchanger disclosed in Japanese Patent Application Laid-Open No. 3-177953, a first heat exchanger and a second heat exchanger having different working temperatures share fins. One or a plurality of cutouts are formed at an intermediate portion in the width direction of the fin to interrupt heat conduction between the heat exchangers. The reference also discloses that the cutouts are a plurality of slits alternately cut from opposite edges in the height direction of the fin.

[0004]

However, in the heat exchanger disclosed in Japanese Utility Model Publication No. 6-45155, a slit is formed in a straight portion of the fin to prevent heat conduction between the fins. However, the heat conduction of the fin is said to be not so high because the bent part of the fin that contacts the tube is the most affected by the heat of the fin and is located closest to the tube of each heat exchanger. Has defects.

[0005] Further, in the compound integrated heat exchanger disclosed in Japanese Patent Application Laid-Open No. Hei 3-17795, 1 to 1 are disposed at the intermediate portion in the width direction of the fin between the first heat exchanger and the second heat exchanger. Although a plurality of notches are formed, the fins on the first heat exchanger side and the fins on the second heat exchanger side are always connected to each other with a predetermined width in spite of the complicated structure, so that the heat cutoff ratio Is not so high.

Accordingly, an object of the present invention is to provide a fin of an integrated heat exchanger having a high heat interruption rate between two heat exchangers.

[0007]

SUMMARY OF THE INVENTION Accordingly, the present invention is directed to a multiple-integrated heat exchanger comprising a plurality of heat exchangers provided in common with fins alternately stacked with tubes, wherein the fins are each A first fin located between the tubes of one heat exchanger and a second fin located between the tubes of the other heat exchanger are formed in a corrugated shape with a portion that is in contact with and joined to the tube as an extreme point. And a connecting portion formed at a pole portion at a predetermined position of the fin and connecting the first fin and the second fin.

[0008] With this, the connecting portion connecting the first fin and the second fin is formed at a pole portion at a predetermined position of the fin. Since the first fin and the second fin are separated from each other, it is possible to improve the heat interruption rate of the first fin and the second fin. In addition, since the connecting portion is provided at the pole portion of the fin, the connecting portion is formed in an arch shape, so that the mechanical strength of the connecting portion is improved, so that the space between the first fin and the second fin is provided. Mechanical strength can be maintained to some extent.

It is preferable that the linking portion is formed at one end of the fin at one cycle at every pole. Thereby, the mechanical strength between the first fin and the second fin can be maintained, and the heat conduction can be suppressed. Further, the connecting portion may be formed at two poles at one pole portion on one side of the fin, every half cycle at the pole portion of the fin, or at two poles at one pole half of the fin. It may be formed every time.
In particular, when there is no problem in the mechanical strength between the first fin and the second fin, it is desirable to increase the interval between the connecting portions.

Further, the distance from the pole portion of the connecting portion to the notch end is preferably about 25% of the distance from the upper pole portion to the lower pole portion between the tubes of each heat exchanger. Preferably, the distance between the first fin and the second fin is approximately 80% of the distance between the tube of the one heat exchanger and the tube of the other heat exchanger. It is most preferable that the fin used in the current integrated heat exchanger be formed with the above numerical values.

Further, the fin having the above configuration is formed by the following method. First, a fin material of a predetermined width made of an aluminum alloy wound on an uncoiler is drawn out, and a slit of a predetermined length is formed substantially in the center of the fin material in the width direction along the traveling direction of the fin material. . Then, the fin material is formed in a corrugated shape at a predetermined cycle so that a portion between the slits in the traveling direction of the fin material becomes a continuous portion, and the corrugated shape is formed with a predetermined number of peaks or a predetermined length. The formed fin material is cut to form fins. Thereby, the fin having the first fin, the second fin, and the connecting portion is
It can be formed integrally.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

The integrated heat exchanger according to the present invention is, for example, as shown in FIG. This integrated heat exchanger 1 has a first
The heat exchanger 2 and the second heat exchanger 3 are arranged side by side in the ventilation direction, and the first heat exchanger 2 is, for example, a part of a cooling cycle of a vehicle air conditioner. The second heat exchanger 3 is a radiator that cools engine cooling water.

The condenser as the first heat exchanger 2 includes a pair of header tanks 4, 4, a plurality of tubes (first tubes) 5 communicating between the pair of header tanks 4, 4, And a plurality of fins 6 interposed between the plurality of first tubes. The header tanks 4, 4 are provided with outflow / inflow pipes 7, 7, respectively, through which a heat exchange medium flows in and out.

The radiator serving as the second heat exchanger 3 includes a pair of header tanks 8, 8 and a plurality of tubes (second tubes) 9 (FIG. 2) communicating between the pair of header tanks 8, 8. 2) and fins 6 interposed between the plurality of second tubes 9 and common to the fins of the first heat exchanger 2. The header tanks 8, 8 are provided with outflow / inflow pipes 10, 10 through which engine cooling water flows in and out, respectively.

The tubes 5, 9 and the fins 6
End plates 11, 1 provided at both ends in the stacking direction with
1, the first and second tubes 5, 9 and the fins 6 are held in the stacking direction, and the first heat exchanger 2 and the second heat exchanger 3
11 are held parallel to the ventilation direction to form an integrated heat exchanger 1, wherein the integrated heat exchanger 1 is a bracket 1
2 fixed at a predetermined position.

In the integrated heat exchanger 1 having the above-mentioned structure, the fins 6 are formed in a corrugated shape from an aluminum alloy, and are disposed between the first tubes 5 of the first heat exchanger 2. Between the first fin 61, the second fin 62 disposed between the second tube 9 of the second heat exchanger 3, and the first fin 61 and the second fin 62. Are connected at predetermined intervals. Also, the first fin 61
In addition, a plurality of louvers 64 are formed in the straight portion of the second fin 62. In the fin 6 formed in a corrugated shape, the straight portion where the louver 64 is formed is referred to as a heat exchange portion 65, and the first and second tubes 5 and 5 are formed.
The bent portion that is joined to the portion 9 is called a pole portion 66. Especially,
The pole part 66 joined to the first and second tubes 5 and 9 in the upper part of the figure is called an upper pole part 66a, and the pole part 66 joined to the tubes 5 and 9 in the lower part of the figure.
Is referred to as a lower pole portion 66b.

In the first embodiment shown in FIGS. 2 and 3 (a), the connecting portion 63 is formed at every cycle, particularly on the lower pole portion 66b side. In this embodiment, all of the lower pole portions 66b
Is formed, so that the strength of the fin 6 can be improved.

In the second embodiment shown in FIG. 3B, the connecting portion 63 is provided at every other pole portion on one side of the fin 6 (every two cycles of the waveform of the fin 6). The poles of
Particularly, it is formed at the lower pole portion 66b. Further, in the second embodiment, a slit 68 having a predetermined width is formed in the other portion where the continuous portion 63 is not formed, so that the first fin 61 and the second fin 61 are formed. A non-conductive space 67 is formed by being separated from 62. Thereby, the first fin 61
Since the thermal conductivity between the first tube 5 and the second tube 9 can be extremely reduced, the thermal effect between the first tube 5 and the second tube 9 can be reduced.

Further, since the connecting portion 63 is formed at the pole portion 66 and thus has an arch shape, the mechanical strength of this portion can be maintained. It is possible to improve the assemblability of the second tube 9 and the fin 6.

In the third embodiment shown in FIG. 3C, the connecting portion 63 is formed at every other extreme portion of the fin 6 (every two cycles of the fin waveform). Particularly, it is provided at the upper pole portion 66a, and can provide the same effect as that of the first embodiment. In the second embodiment and the following embodiments,
Identical portions and portions having similar effects are denoted by the same reference numerals, and description thereof will be omitted.

Further, the width of the connecting portion 63 is as shown in FIG.
As shown in (a) and (b), between one (upper) pole portion 66a of the fin 6 and the other (lower) pole between the first tubes 5, 5 or the second tubes 9, 9. Part 6
H, the distance between the first tube 5 and the second tube 9 is L, the length of the fin cut from one (upper) pole portion 66a side is Hc, and the length of the fin cut is Hc. When the width is Lc, Hc / H (fin cut rate)
In consideration of the characteristic diagram of FIG. 5 and the mechanical strength of the fin, specifically, the heat interruption rate is set to 70% or more,
It is considered that 75% is optimal because the fin 6 has a size capable of maintaining the mechanical strength.

In this characteristic diagram, M is a characteristic line showing the relationship between the fin cut rate and the heat exchanger cutoff rate when the fin cut portion is formed from the center of the heat exchange section 65, and T is the fin cut section. 6 is a characteristic line showing a relationship between a fin cut rate and a heat exchanger cutoff rate when a cut portion is formed from a pole portion 66. From this, the heat exchange part 6 of the fin 6 is also
When the slit is formed from the pole portion 66, the heat blocking rate is better than when the slit is formed in the fifth portion.

Further, the inter-tube width L and the cutting width Lc
Is preferably about 80%.
If it is more than this, the mechanical strength of the connecting portion 63 becomes too weak, and if it is less than this, the width of the connecting portion 63 becomes narrow, so that the heat cutoff rate decreases.

The method for forming the fins 6 is shown in FIG.
As shown in (a) and (b), the fin material 60 wound around an uncoiler (not shown) is drawn out to form a slit 68. In this formation, a method of continuously forming with a roll gear is desirable. Then, the fin material 60 is formed in a corrugated shape so that the connection portion 70 between the formed slits 68 becomes the pole portion 66 at a predetermined position, and at the same time, the louver 6 is attached to the heat exchange portion 65 between the pole portions 66, 66.
4 is formed. As a result, the louver 6 is
4 are formed, and then the fin material 60A is cut by a predetermined number of peaks or a predetermined length, thereby forming the fins 6A.
Is formed.

In the fin according to the fourth embodiment of the present invention, the connecting portion 63 is provided at every two pole portions 66 on one side of the fin 6 (every three cycles of the waveform of the fin 6). 7 (a) is formed at every other lower pole portion 66b. Therefore, the ratio of the non-conducting space of the fin 6 can be increased, so that the first fin 61 and the second fin 6
2 can be improved. Further, the connecting portion 63 is provided at every two extreme portions 66 on the other side of the fin 6, that is, at every other upper extreme portion 66.
The structure formed as a can also obtain the same effect as that of the third embodiment.

Further, in the fin according to the fifth embodiment shown in FIG. 7 (b), a continuous portion 63 is provided at every two pole portions 66, that is, at every one and a half period of the waveform of the fin 6. The upper pole portion 66a is formed at every other upper pole portion 66a from the lower pole portion 66b.
6a, the lower pole portion 66b and the link portion 63 are formed every other portion. As described above, the connecting portions 63 are formed above and below at predetermined intervals, so that the fins 6 are formed.
This ensures that the mechanical strength of the steel can be maintained.

Further, in the fin according to the sixth embodiment, the connecting portion 63 is provided at every three pole portions 66 on one side of the fin 6 (every four periods of the waveform of the fin 6). The one formed in the part 66, particularly the one shown in FIG.
It is formed on every third lower pole portion 66b. Therefore, the ratio of the non-conducting space of the fin 6 can be further increased, so that the first fin 61 and the second fin 6
2 can be improved. Also, the connecting portion 63 is provided at every third pole portion 66 on the other side of the fin 6, that is, at every third upper pole portion 66.
The structure formed as a can also obtain the same effect as that of the fifth embodiment.

Further, in the fin according to the seventh embodiment shown in FIG.
Are formed at the pole portions 66 every two and a half cycles of the so-called fin 6 waveform.
Every other upper pole portion 66a,
The fourth lower pole portion 66b and the link portion 63 are formed every four from a. In this manner, the formation of the continuous portions 63 above and below at a predetermined interval allows the mechanical strength of the fins 6 to be reliably maintained.

[0030]

As described above, according to the present invention, in the fin shared by the two heat exchangers of the integrated heat exchanger, the portion of the fin that is in contact with the tube of one of the heat exchangers (the first heat exchanger). A part (non-conductive space) is formed at a predetermined interval to separate a part between the fin) and a part (second fin) that abuts on the tube of the other heat exchanger. It is possible to improve the heat insulation between the second fin and the second fin.

Further, since the link between the first fin and the second fin is provided at the pole portion of the fin, the link can be formed in an arch shape. Since the mechanical strength of the two heat exchangers can be improved, temporary assembly of the two heat exchangers can be easily performed.

Further, from the above configuration, the weight of the heat exchanger can be reduced and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of an integrated heat exchanger according to an embodiment of the present invention.

FIG. 2 is a partially enlarged perspective view showing a configuration of a fin according to the first embodiment of the present invention.

3A is a partially enlarged sectional view of a fin according to the first embodiment, FIG. 3B is a partially enlarged sectional view of a fin according to the second embodiment, and FIG. () Is a partially enlarged cross-sectional view of the fin according to the third embodiment.

FIG. 4A illustrates the shape of a fin according to the present invention, and also defines definitions such as a distance H from an upper pole portion to a lower pole portion of the fin, and a length Hc of a fin cut from the pole portion. FIG. 3B is a partially enlarged front view of FIG.

FIG. 5 is a characteristic diagram showing a relationship between a fin cut rate and a heat cutoff rate.

FIG. 6 is an explanatory view illustrating a fin manufacturing process.

7A is a partially enlarged sectional view showing a fourth embodiment, FIG. 7B is a partially enlarged sectional view showing a fifth embodiment, and FIG. () Is a partially enlarged sectional view showing the sixth embodiment, and (d) is a partially enlarged sectional view showing the seventh embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Integrated heat exchanger 2 1st heat exchanger 3 2nd heat exchanger 5 1st tube 6 fin 9 2nd tube 60 fin material 61 1st fin 62 2nd fin 63 connecting part 64 Louver 65 Heat exchange section 66 Extreme pole section 66a Upper pole section 66b Lower pole section 67 Non-conductive space 68 Slit

Claims (7)

[Claims] 1. A multiple integrated heat exchanger comprising a plurality of heat exchangers provided in common with fins alternately stacked together with tubes, wherein the fins are provided at a point abuttingly joined to each tube. A first fin positioned between the tubes of one heat exchanger, a second fin positioned between the tubes of the other heat exchanger, and a predetermined position of the fin A fin structure of an integrated heat exchanger, wherein the fin structure is constituted by a connecting portion formed at a pole portion of the first heat exchanger and connecting the first fin and the second fin. 2. The fin structure of an integrated heat exchanger according to claim 1, wherein the linking portion is formed at one end of the fin at one end of the fin at every period. 3. The fin structure of an integrated heat exchanger according to claim 1, wherein the connecting portion is formed at two poles at a pole portion on one side of the fin. 4. The fin structure of an integrated heat exchanger according to claim 1, wherein the link portion is formed at a pole portion of the fin at intervals of one and a half cycles. 5. The fin structure of an integrated heat exchanger according to claim 1, wherein the connecting portion is formed at every two and a half cycles at a pole portion of the fin. 6. The distance between the pole portion of the connecting portion and the notch end is approximately 25% of the distance from the upper pole portion to the lower pole portion between the tubes of each heat exchanger. The fin structure of the integrated heat exchanger according to claim 1. 7. The distance between the first fin and the second fin is approximately 80% of the distance between the tube of the one heat exchanger and the tube of the other heat exchanger. 7. The fin structure of an integrated heat exchanger according to claim 1, wherein: