JPH10170184A - Heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a heat exchanger having advantage of improved heat exchange performance in a type which has two heat exchanges having different performances formed integrally. SOLUTION: In a heat exchanger having a first heat exchanger A and a second heat exchanger B in which a tube 4 constituting the first heat exchanger and a tube 5 constituting the second heat exchanger B are arranged on the upstream side and the downstream side in the direction of ventilation, a fin 6 is disposed between both the tubes 4 and 5 and end parts of the tubes 4 and 5 are inserted and connected into tanks, louvers 7A and 7B are formed on the fin 6. The louvers of the fin are formed differently between the louver 7A and the group 7A thereof formed at a fin part arranged in the first heat exchanger A and the louver 7B and the group 7B thereof formed at a fin part arranged in the second heat exchanger B.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a heat exchanger formed by combining two heat exchangers having different purposes.

[0002]

2. Description of the Related Art Conventionally, there has been known a heat exchanger formed by combining two heat exchangers having different purposes.
As this type of heat exchanger, for example, Japanese Utility Model No. 6-451
No. 55 and Japanese Patent Application Laid-Open No. 7-332890, a first heat exchanger having a configuration in which a tube and a fin are arranged between a pair of tanks, and a first heat exchanger. There has been proposed a heat exchanger in which similarly configured second heat exchangers are arranged in parallel and interconnected and integrated.

Further, as described in Japanese Utility Model Laid-Open No. 2-54076, flat plate fins are laminated, a plurality of tubes are connected to the plate fins, and one end of the tubes constitutes a tank. The end plate and the tank plate are assembled together to form a heat exchanger.The end plate and the tank plate are provided separately, or the tank plate is provided separately. There has been proposed a heat exchanger in which a first heat exchanger and a second heat exchanger are integrally formed.

Another known heat exchanger is formed by combining two different heat exchangers in series in the vertical or horizontal direction. For example, a tube and a fin are provided between a pair of tanks, and a partition plate is provided in the middle of the pair of tanks as described in Japanese Utility Model Publication No. 59-16692 and Japanese Utility Model Application Laid-Open No. 2-36772. It has been proposed that the heat exchanger be provided with substantially two heat exchangers even if it is installed.

[0005] In such a heat exchanger, the tank and the tube form a heat exchange medium passage, and the fins form an air passage. Then, the heat exchange medium supplied from the tank flows through the inside of the plurality of tubes, and heat exchange with the outside is performed by fins interposed between the tubes.

[0006] The fin is compressed or compressed in the longitudinal direction after a flat fin material is rotated between several sets of upper and lower gear-shaped roll dies that mesh with each other, or compressed. It is formed in a side wave shape having a pitch. In addition, fins, considering heat exchange rate improvement and ventilation resistance,
Generally, louvers are often formed on the surface,
The louvers are simultaneously formed by the roll mold when the fins are formed in a wave shape.

[0007]

In the conventional heat exchanger formed by combining two heat exchangers, the fins disposed between the tubes are formed integrally with the first and second heat exchangers. Fins are often provided. However, the use and performance of each heat exchanger are different, and the required performance such as required heat release amount and ventilation resistance is different. For this reason, if the fin shape is formed in accordance with the performance of one of the heat exchangers, there is a problem that the heat exchange rate of the other heat exchanger is reduced.

Therefore, it is conceivable to separately provide a fin joined to the first heat exchanger and a fin joined to the second heat exchanger. However, arranging the fins for each of the first and second heat exchangers is not preferable because the number of parts increases and workability becomes complicated.

Accordingly, the present invention provides a heat exchanger capable of solving the above-mentioned disadvantages and improving heat exchange performance without separately providing fins provided in the first and second heat exchangers. The purpose is to obtain.

[0010]

Means for Solving the Problems The invention described in the first claim of the present application is directed to a tube and a second tube constituting a first heat exchanger.
The tubes constituting the heat exchanger are arranged upstream and downstream in the ventilation direction, fins formed integrally between the tubes are arranged, and the ends of the tubes are inserted and connected to the tanks. In the heat exchanger including the first and second heat exchangers, a louver is formed on the fin, and the louver is a louver group formed on a fin portion provided in the first heat exchanger. And a louver group formed in a fin portion provided in the second heat exchanger.

According to a second aspect of the present invention, in the first aspect of the invention, the two louver groups of the fin include at least an angle of the louvers, a cutting length, a number of the louvers,
One or more items of the width are different types of heat exchangers.

According to a third aspect of the present invention, in the first aspect of the invention, the two louver groups of the fin are heat exchangers having different opening directions.

According to a fourth aspect of the present invention, there is provided a heat exchanger according to the first aspect, wherein the tube and the fin are integrally assembled and brazed in a furnace.

According to a fifth aspect of the present invention, there is provided a heat exchanger according to the first aspect, wherein the tube, the fin, and the tank are integrally assembled and brazed in a furnace.

According to a sixth aspect of the present invention, there is provided a heat treatment apparatus according to the first aspect, wherein the tube, the fins, and the tank portion laminated to form a tank are integrally assembled and brazed in a furnace. It is an exchanger.

The invention described in claim 7 of the present application is the heat exchanger according to claim 1, wherein the tube, the fins, and the end plate are joined to a tank after brazing in a furnace.

According to an eighth aspect of the present invention, in the heat exchanger of the first to seventh aspects, the tube is a heat exchanger having a U-shaped passage.

Therefore, according to the first aspect of the present invention, since the air flowing through the fins flows differently between the first and second heat exchangers, the required heat exchange performance of each heat exchanger is achieved. It is possible to perform heat exchange without lowering the temperature.

For example, in a heat exchanger in which a radiator and a condenser are combined and integrally formed, when fins formed integrally between each tube of the radiator and the condenser are provided, the fins are required to have the required performance of the condenser. By setting the louver angle, the cutting length, the number of sheets, and the width in accordance with (amount of heat radiation and ventilation resistance), the capacitor satisfies the required performance.

On the other hand, although the same fin is also provided in the radiator, the radiator and the condenser are required to have different heat exchange performances. Therefore, the same fin as the condenser is provided. In this case, the performance of the radiator often does not satisfy the requirements. Therefore, a louver having a shape different from that of the louver formed in the portion provided in the capacitor satisfies the required performance of the radiator by using the fin formed in the portion provided in the radiator, and the heat exchange performance of the radiator is satisfied. Can also be improved.

As described above, when two heat exchangers having different performances such as a radiator and a condenser are combined and integrally formed, a louver having a different shape is provided for each fin portion provided in each heat exchanger. By disposing the formed fins in each heat exchanger, it is possible to satisfy the performance requirements of each heat exchanger without changing the fin pitch width and the like, thereby improving the heat exchange rate of each heat exchanger. A heat exchanger having the same.

Further, since the integrally formed fins are disposed between the heat exchangers, the assemblability of the tube is improved, the number of parts is reduced, and the manufacturing process is facilitated. . As described above, when the heat exchanger in which the heat exchangers having different performances are combined is formed, the mounting space for the heat exchanger is reduced, and the weight can be reduced. There is an advantage that the size can be reduced and the number of assembling steps can be reduced.

As described above, according to the present invention, since the two louver groups formed on the fins are formed differently, the required performance of each heat exchanger can be satisfied, and as a result, the overall performance can be improved. The heat exchange rate can be improved.

Further, it is preferable to configure as described in the embodiment section. That is, the two louver groups of the fins are formed so that at least one of the louver angles, cut lengths, number of sheets, and widths is different, and the opening directions are different. By doing so, the required performance of each heat exchanger can be satisfied finely.

Further, the present invention can be used for a heat exchanger having a structure in which a tube and a fin are integrally assembled and brazed in a furnace. Basically, the tube and fins are integrated and brazed in the furnace, and in addition to the brazing of the tubes and fins, the tank described below, the tank portion forming the tank, and the end plate forming the tank Etc. will be brazed at the same time.

Further, the present invention can also be used for a heat exchanger having a structure in which a tube, fins, and a tank are integrally assembled and brazed in a furnace. In this case, the tank is combined with a cylindrical one or a two-part tank, and brazed together with the tube and the fin.

The present invention can also be used for a heat exchanger having a structure in which a tube, fins, and a tank portion that is laminated to form a tank are integrally assembled and brazed in a furnace. In this case, the above-described laminate type in which the tank is integrally formed with the tube is integrally brazed.

Further, the present invention can also be used for a heat exchanger having a configuration in which a tube, a fin, and an end plate are brazed in a furnace and then joined to a tank. In this case, the tube, the fins, and the end plate are brazed in a furnace, and then joined by caulking using a sealing material. This is the case where the pressure resistance required for the heat exchanger is not so high.

Further, it is also used for a heat exchanger having a structure in which a U-turn-shaped passage is formed in a tube. The heat exchanger of this configuration is a one-tank type formed by joining the end of the tube on the opposite side of the U-turn-shaped passage to the tank, and the present invention is also applicable to this one-tank type. Can be applied.

[0030]

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

FIG. 1 is a perspective view of the heat exchanger of this embodiment, and FIG.
Shows a part of tubes and fins used in this heat exchanger. In this heat exchanger 1, two pairs of tanks 2, 2 and 3, 3 are arranged in parallel, and between one tank 2, 2 A plurality of tubes 4 and 4 are provided, and a plurality of tubes 5 and 5 are provided between the other tanks 3 and 3.
The same fins 6,6 are arranged and laminated between the tubes 4,5 between the tubes 4,5,5, and the tubes 4,4,5,5,5,6,6 are integrally brazed in the furnace. ing. Both ends of the tubes 4 and 5 are connected by being inserted into tube insertion holes (not shown) of the tanks 2, 2 and 3, respectively.

The upper and lower openings of the tanks 2 and 3 are closed by caps 8. Side plate connection holes (not shown) are formed in the upper and lower ends of the tanks 2 and 3, respectively.
Are provided, and both ends of the side plates 9 and 9 are inserted and joined to these side plate connection holes. That is, the side plate 9 has four tanks 2 and 2
The first and second heat exchangers A and B joined to the upper and lower ends of the tanks 3 and 3 and installed in parallel in the horizontal direction are integrally formed.

A partition plate (not shown) is provided inside the tank 2 to partition the inside of the tank 2 in the longitudinal direction. The inlet joints 10A, 10B are connected to one of the two tanks 2, 2, and 3, respectively, and the outlet joints 11A, 11B are connected to the other tanks 4, 5, respectively. Then, between the inlet joints 10A, 10B and the outlet joints 11A, 11B, the heat exchange medium flows in a meandering manner a plurality of times. In addition, long beads 5a are formed in the tube 5, and these long beads 5a are joined to the plate surface, or the long beads 5a, 5a are joined to each other to improve the pressure resistance and improve the heat exchange medium. A turbulent flow is generated to improve the heat exchange rate.

In this embodiment, the tubes 4 and 5 are made of an electric resistance welded tube, an extruded tube, a plate formed by combining two plates formed by press or roll, or a single plate formed by press or roll. A plate formed by folding the plate further in half or a plate formed by folding one plate in half while performing roll forming is used. The material of the tube is an extruded material or a three-layered material having a double-sided clad, and a four-layered material having an intermediate layer on the double-sided clad.

In FIG. 2, the fins 6 are a plane portion of the fin 6 joined to the tube 4 constituting the first heat exchanger A, and a fin joined to the tube 5 constituting the second heat exchanger B. A different louver group is provided in the plane portion 6. In this example, the opening direction, the cutting length, the width, the louver angle and the number of sheets differ from those of one louver group with respect to those of the other louver group. That is, as shown in FIG. 3, the louvers 7A and 7B are formed so as to have different opening directions, cut length t, width w, louver angle θ, and number of louvers. These louvers 7A and 7B are simultaneously formed on the flat portion of the fin 6 when the fin 6 is formed in a wave shape.

In this example, the first heat exchanger A is a radiator, the second heat exchanger B is a condenser, and the first and second heat exchangers A and B are condensers.
The heat exchanger 1 is formed by combining the heat exchangers A and B in parallel in the horizontal direction.

As described above, by changing the shape of the opening of the louver formed in the flat portion of the fin 6 between the first heat exchanger A and the second heat exchanger B, the turbulence of the flowing air and the The heat exchange performance can be improved by diffusion, and the required heat exchange performance of each heat exchanger can be satisfied. In addition, since the heat exchange rates can be improved by using integrally formed fins and a plurality of heat exchangers can be integrally formed, the number of parts is reduced, and the manufacturing process is facilitated. In addition, if a plurality of heat exchangers can be integrally formed, the mounting space can be reduced and the weight can be reduced, so that the size of the device including the heat exchanger can be reduced, and the number of assembling steps can be reduced. Be reduced.

Hereinafter, preferred embodiments will be described with reference to the drawings. Note that common components will be described with the same reference numerals.

FIG. 4 relates to another specific example of the fin, in which a notch 6a for preventing heat transfer is formed in the fin shown in FIG. 2 of the previous example. When the notches 6a are formed in the fins 6 in this manner, the above-described effects that can satisfy the heat exchange required performance of each heat exchanger can be further embodied.

FIGS. 5 and 6 relate to another specific example of the fin. FIG. 5 is a partial longitudinal sectional view of the fin and the tube.
FIG. 6 shows a partial cross-sectional view of the fin.

In FIGS. 5 and 6, the fin 6 is the first fin.
In addition, louvers 7A and 7B having different shapes are formed in the plane portions of the fins 6 provided in the second heat exchangers A and B according to the respective heat exchangers. These louvers 7A and 7B are formed by forming a fixed pattern, respectively, and the louvers 7A and 7B are formed.
Are formed in different shapes from each other. According to this example, the portion of the fin 6 joined to the first heat exchanger A includes:
The louver forms one specific pattern, and the pattern is repeated to form the louver 7A. On the other hand, in the portion of the fin 6 joined to the second heat exchanger B, three louvers constitute one specific pattern, and the pattern is repeated to form a louver 7B. These louvers are formed by appropriately changing the opening direction of the louvers for each louver pattern. In the heat exchanger of this embodiment, the tubes 4 constituting the first and second heat exchangers A and B are integrally formed by extrusion molding, and 12a
Is a tube passage constituting the first heat exchanger A,
2b is a tube passage constituting the second heat exchanger B.
In a portion located between the first and second heat exchangers A and B,
In order to prevent heat transfer of the first and second heat exchangers A and B, a cavity 12c is formed.

As described above, the louver is formed for each louver pattern by changing the louver angle, and further, the cut length, the width, and the number of the louvers, or the opening direction of the louvers is changed, so that the turbulent flow and diffusion of the flowing air are performed. Occurs, so that the heat exchange performance of the heat exchanger can be improved.

The specific example shown in FIG. 7 shows a heat exchanger formed by combining the first and second heat exchangers of a single tank type. FIGS. 8 and 9 show the tubes of the heat exchanger shown in FIG. FIG. 3 is a partial cross-sectional view of the fin.

In these figures, one end of a tube 4 is connected to tanks 2 and 3, and each of the tubes 4 and 4 has a closed portion 13 formed in the longitudinal direction of the tube 4 to divide the passage into two in the longitudinal direction. doing. One passage 14 is connected to the tank 2 to form a first heat exchanger A, and the other passage 1
5 is connected to the other tank 3 to form a second heat exchanger B, and the first and second heat exchangers A and B are integrally formed.

The projections 14a and 15a are ridges, and the ridges 14a and 15a are joined to the plate surface.
The passages 14 and 15 are formed in a U-turn shape by joining the 4a and 14a or the 15a and 15a. 15b, 1
5b is a long bead.

The fins 6 provided in the first and second heat exchangers A and B are connected to the first heat exchanger A and the second heat exchanger A, respectively.
The louvers 7A and 7B having different shapes are formed at a portion joined to the heat exchanger B, and the louvers 7A and 7B are different from each other.
B are formed by forming respective unique patterns, and are formed alternately in different opening directions for each pattern. For this reason, air diffusion and turbulence occur, and the heat exchange performance of each heat exchanger is improved.

The specific example shown in FIG. 10 uses first and second heat exchangers A,
B is a heat exchanger integrally formed, this heat exchanger,
A tube insertion hole 16a is formed in the plate fin 16 (see FIG. 12), and a plurality of circular tubes 4, 4 are communicatively connected to the tube insertion hole 16a.
As shown in FIG. 11, at least one end of the tube 4 is joined to the tube insertion hole 17a of the end plate 17, and is inserted into two rectangular fitting grooves 17b surrounding the plurality of tubes 4 and 4 formed in the end plate 17. A tank plate 2b constituting the first heat exchanger A and a tank plate 3b constituting the second heat exchanger B are fitted and the first and second heat exchangers A and B are integrally formed. It is. That is,
In this case, the tanks 2 and 3 are formed by the end plate 17 and the tank plates 2b and 3b. After the tubes 4 and 4, the fins 16 and 16 and the end plate 17 are brazed, the tank plates 2b and 3b are 3b
And are joined by caulking using a sealing material not shown. Tank plate 2b, 3b
Have inlet joints 10A, 10B and outlet joints 11A, 1
1B is provided, and a side plate 9 is provided on the opposite side of the tanks 2 and 3.

FIG. 12 shows plate fins forming the heat exchanger shown in FIG. The plate fins 16 are formed with louvers 7A and 7B around the tube communication hole 16a. The louvers 7A and 7B are formed by forming a fixed pattern, and a louver 7A formed at a portion forming the first heat exchanger A and a second heat exchanger B
Is formed by changing the louver angle, cutting length, width, and number of sheets for each louver pattern, or by changing the opening direction of the louver. For this reason, the air flowing through the plate fins 16 causes diffusion and turbulence, so that the heat exchange performance can be efficiently improved.

FIG. 13 shows another example of the plate fin. The plate fins 16 are formed with louvers 7A and 7B around the tube communication hole 16a. The louvers 7A and 7B are formed by forming a fixed and plural patterns, and the louvers 7A formed in the portion forming the first heat exchanger A and the louvers formed in the portion forming the second heat exchanger B 7B is formed by changing the louver angle, cutting length, width, and number of sheets for each louver pattern, or by changing the opening direction of the louver.
For this reason, as in the previous example, the air flowing through the plate fins 16 causes diffusion and turbulence to efficiently improve the heat exchange performance.

In addition, a louver having a different opening form is similarly formed in a laminate type integrated heat exchanger in which a tank portion is formed integrally with a tube, a heat exchanger using a two-part type tank, and the like. The heat exchange performance can be improved by using the fins.

As described above, in the heat exchanger of the present embodiment described above, the two louver groups formed on the fins are formed differently, so that the required performance of each heat exchanger can be satisfied. Thus, the heat exchange rate as a whole can be improved.

If the two louver groups of the fins are formed so that at least one of the louver angle, the cut length, the number of sheets, the width, and the opening direction are different from each other, the requirements of each heat exchanger are fine. Performance can be satisfied.

Further, this embodiment can be used for a heat exchanger having a structure in which a tube and a fin are integrally assembled and brazed in a furnace. Basically, a tube and fins are integrated and brazed in a furnace. In addition to the brazing of the tubes and fins, a tank,
Either the tank part forming the tank, the end plate forming the tank, or the like is brazed at the same time.

The above-mentioned fin structure can also be used for a heat exchanger in which the tube, the fin, and the tank are integrally assembled and brazed in a furnace. In this case, the tank is combined with a cylindrical one or a two-part tank, and brazed together with the tube and the fin.

Further, the present invention can also be used for a heat exchanger having a structure in which a tube, fins, and a tank portion laminated to form a tank are integrally assembled and brazed in a furnace. In this case, the above-described laminate type in which the tank is integrally formed with the tube is integrally brazed.

The fin structure of this embodiment can also be used in a heat exchanger having a configuration in which the tube, the fin, and the end plate are brazed in a furnace and then joined to a tank. In this case, after the tube and the fin are brazed in a furnace, they are joined by caulking using a sealing material. This is the case where the pressure resistance required for the heat exchanger is not so high.

The present invention is also used for a heat exchanger having a structure in which a U-shaped passage is formed in a tube. The heat exchanger of this configuration is a one-tank type formed by joining the end of the tube on the opposite side of the U-turn-shaped passage to the tank, and the fin structure of the present example is a single-tank type It can also be applied to things.

[0058]

As described above, according to the present invention, the tubes constituting the first heat exchanger and the tubes constituting the second heat exchanger are arranged upstream and downstream in the ventilation direction. A fin is provided between the fins, and a louver is formed on the fins. The louvers of the fins are formed differently in the louver group formed in the fin portion provided in the first heat exchanger and the louver group formed in the fin portion provided in the second heat exchanger. It is a heat exchanger of the configuration that is used. Then, the two louver groups of the fin are
At least different louver angles, different louver cut lengths, different louver numbers, different louver widths in one or more items, different louver opening angles, etc. Then
Since the air flowing through the fins flows differently between the first and second heat exchangers, heat exchange can be performed without lowering the required heat exchange performance of each heat exchanger. .

As described above, according to the present invention, since the two louver groups formed on the fins are formed differently, the required performance of each heat exchanger can be satisfied, and as a result, the overall performance can be improved. The heat exchange rate can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a heat exchanger according to a specific example of the present invention.

FIG. 2 is a partial longitudinal sectional view of the fin and tube of FIG. 1 according to a specific example of the present invention.

FIG. 3 is a partial longitudinal sectional view of a fin and a tube for explaining an opening direction, an opening angle, a cut length, and a width of a louver.

FIG. 4 is a partial longitudinal sectional view of a fin and a tube according to another embodiment of the present invention.

FIG. 5 is a partial longitudinal sectional view of a fin and a tube according to another embodiment of the present invention.

6 is a cross-sectional view of the fin shown in FIG.

FIG. 7 is a perspective view of a heat exchanger according to another embodiment of the present invention.

FIG. 8 is a partial longitudinal sectional view of a fin and a tube according to another embodiment of the present invention.

FIG. 9 is a cross-sectional view of a tube having a U-turn-shaped passage according to another embodiment of the present invention.

FIG. 10 is a perspective view of a heat exchanger according to another embodiment of the present invention.

11 is a vertical sectional view of a tank portion of the heat exchanger shown in FIG.

FIG. 12 is a longitudinal sectional view of the fins and tubes of the heat exchanger shown in FIG.

FIG. 13 is a longitudinal sectional view showing another example of the plate fin.

[Explanation of symbols]

 Reference Signs List 1 heat exchanger 2 tank 2b tank plate 3 tank 3b tank plate 4 tube 5 tube 5a long bead 6 fin 6a notch 7A louver 7B louver 8 cap 9 side plate 10A inlet joint 10B inlet joint 11A outlet joint 11B outlet joint 12a 12b Tube passage 12c Cavity 13 Closure 14 Passage 14a Ridge 15 Path 15a Ridge 15b Long bead 16 Plate fin 16a Tube communication hole 17 End plate 17a Tube insertion hole 17b Fitting groove

Claims (8)

[Claims] 1. A tube constituting a first heat exchanger and a tube constituting a second heat exchanger are arranged upstream and downstream in a ventilation direction, and fins formed integrally between the two tubes are provided. A heat exchanger comprising a first heat exchanger and a second heat exchanger in which the ends of the tubes are inserted and connected to tanks, wherein the fins are formed with louvers, and the louvers are The louver group formed in the fin portion provided in the first heat exchanger and the louver group formed in the fin portion provided in the second heat exchanger are formed differently. Heat exchanger. 2. The heat exchanger according to claim 1, wherein the two louver groups of the fins differ from each other in at least one of an angle, a cutting length, a number, and a width of the louvers. . 3. The louver group of the fins having different opening directions.
The heat exchanger as described. 4. The heat exchanger according to claim 1, wherein the tube and the fin are integrally assembled and brazed in a furnace. 5. The heat exchanger according to claim 1, wherein the tube, the fin, and the tank are integrally assembled and brazed in a furnace. 6. The heat exchanger according to claim 1, wherein the tube, the fins, and the tank portion that is laminated to form a tank are integrally assembled and brazed in a furnace. 7. The heat exchanger according to claim 1, wherein the tube, the fin, and the end plate are joined to a tank after brazing in a furnace. 8. The heat exchanger according to claim 1, wherein a U-shaped passage is formed in the tube.