JP3670751B2 - Integrated heat exchanger - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an integrated heat exchanger formed by connecting two heat exchangers.
[0002]
[Prior art]
Recently, a so-called integrated heat exchanger in which a condenser for cooling is connected to the front surface of a radiator has been devised. In such an integrated heat exchanger, for example, JP-A-1-224163 is disclosed. An integrated heat exchanger tank is disclosed.
[0003]
FIG. 6 shows an integrated heat exchanger disclosed in JP-A-1-247990. This integrated heat exchanger is used as a first heat exchanger 1 used as a radiator and a condenser for cooling. The second heat exchangers 3 are arranged in parallel.
The first heat exchanger 1 connects a pair of an aluminum upper tank 5 and a lower tank 7 that are opposed to each other at a predetermined interval by an aluminum tube 9, and the second heat exchanger 3 is a fixed one. A pair of aluminum upper tank 11 and lower tank 13 which are arranged to face each other with a gap are connected by an aluminum tube 15.
[0004]
As shown in FIG. 7, the aluminum tube 9 and the tube 15 of the first heat exchanger 1 and the second heat exchanger 3 are in contact with the aluminum fins 17 having a width straddling both. That is, the first heat exchanger 1 and the second heat exchanger 3 constitute a heat radiating part (core part) 19 with the common fins 17.
The 1st heat exchanger 1, the 2nd heat exchanger 3, and the thermal radiation part (core part) 19 are brazed integrally.
[0005]
[Problems to be solved by the invention]
However, in such a conventional integrated heat exchanger, the upper tanks 5 and 11 and the lower tanks 7 and 13 of the first heat exchanger 1 and the second heat exchanger 3 are both circular in cross section. Therefore, the following problems have occurred.
Usually, the 1st heat exchanger 1 used as a radiator is larger than the 2nd heat exchanger 3 used as a condenser for cooling.
[0006]
Accordingly, the first heat exchanger 1 and the second heat exchanger 3 are different between the upper and lower tanks 5 and 11 and the lower tanks 7 and 13 as shown in FIG. La) becomes wider, the thickness Wa of the heat radiating part (core part) 19 becomes thicker, and the area 16 indicated by the oblique lines between the tubes 9 and 15 becomes a useless area.
Therefore, in order to make the heat radiating part (core part) 19 thinner, as shown in FIG. 9, tube holes 20 formed in the upper tank 5 and the lower tank 7 of the first heat exchanger 1 are provided with the second heat exchanger. Although it is conceivable to change it to a value close to 3, this makes hole machining difficult and is not suitable for practical use.
[0007]
The present invention has been made to solve such conventional problems, and an object of the present invention is to provide an integrated heat exchanger capable of thinning the heat radiating portion (core portion) with a simple structure. .
[0008]
[Means for Solving the Problems]
Invention of Claim 1 has a 1st heat exchanger and a 2nd heat exchanger, a 1st heat exchanger connects between tanks by a plurality of tubes, and a 2nd heat exchanger has a plurality of tubes between tanks. In the integrated heat exchanger in which fins straddling the two tubes are arranged between the tubes, the tank of the first heat exchanger is provided on a side wall that is perpendicular to the bottom surface that has a plurality of tube insertion holes. The tank of the second heat exchanger has a round cross-sectional shape, and has a bottom surface for drilling a plurality of tube insertion holes. The first heat exchanger and the second heat exchanger are each tube The axial center of the insertion hole is parallel, and the second heat exchanger is brought into contact with the flat portion of the tank of the first heat exchanger.
[0009]
The invention of claim 2 is characterized in that, in the integrated heat exchanger according to claim 1, the tank of the first heat exchanger has a square cross-sectional shape, and the tank of the second heat exchanger has a round cross-sectional shape. To do.
According to a third aspect of the present invention, in the integrated heat exchanger according to the first or second aspect, the tank of the first heat exchanger and the tank of the second heat exchanger are made of an integrally extruded product of aluminum. It is characterized by this.
[0010]
The invention of claim 4 is the integrated heat exchanger according to any one of claims 1 to 3, wherein the bottom surface of the tank of the first heat exchanger and the bottom surface of the tank of the second heat exchanger are flush with each other. It is characterized by being.
The invention according to claim 5 is the integrated heat exchanger according to any one of claims 1 to 4,
The tube insertion hole (49, 51) of the first heat exchanger (21) is provided closer to the second heat exchanger (23) than the center of the tank (25, 27) of the first heat exchanger (21). It is characterized by being .
[0011]
(Function)
In the inventions of claims 1 to 5 , when the tubes of the first heat exchanger and the second heat exchanger are made parallel and the tank of the second heat exchanger is brought into contact with the flat portion of the first heat exchanger, The distance between the tubes can be minimized.
[0012]
In the invention according to claim 4, the tube length of the second heat exchanger can be minimized.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention shown in the drawings will be described in detail.
[0014]
FIGS. 1 to 3 show an embodiment of an integrated heat exchanger according to the inventions of claims 1 to 5 , in which the reference numeral 21 denotes a first heat exchanger constituting a radiator, The code | symbol 23 has shown the 2nd heat exchanger which comprises a capacitor | condenser.
The tanks 25 and 27 of the first heat exchanger 21 and the tanks 31 and 33 of the second heat exchanger 23 are made of aluminum and are integrally formed by extrusion.
[0015]
The tanks 25 and 27 of the first heat exchanger 21 have a box cross-sectional shape, and the tanks 31 and 33 of the second heat exchanger 23 have a round cross-sectional shape. The tanks 31 and 33 of the second heat exchanger 23 are in contact with the lower part of the flat portion 39 formed on the side walls of the tanks 25 and 27 of the first heat exchanger 21 and are integrated with each other through the connecting portion 61. . The first heat exchanger 21 and the second heat exchanger 23 have the tanks 25 of the first heat exchanger 21 with the shaft centers 49a, 51a, 53a, 55a of the tube insertion holes 49, 51, 53, 55 parallel to each other. , 27 is in contact with the second heat exchanger 23.
[0016]
Here, the flat surface portion 39 is formed on the entire side surface of the second heat exchanger 23 on the side of the tanks 31 and 33, and is perpendicular to the bottom surfaces 41 and 43 of the tanks 25 and 27 of the first heat exchanger 21. It has become.
And as shown in FIG. 2, both tanks 25, 27, 31, and 33 are located on the horizontal line H which the bottom face 41, 43, 45, 47 shows with a dashed-dotted line.
[0017]
Tube insertion holes 49 and 51 are formed in the bottom surfaces 41 and 43 of the tanks 25 and 27 of the first heat exchanger 21. The tube 29 is inserted through the tube insertion holes 49 and 51. The tube insertion holes 49 and 51 are formed perpendicular to the bottom surfaces 41 and 43 of the tanks 25 and 27 of the first heat exchanger 21.
Tube insertion holes 53 and 55 are formed in the bottom surfaces 45 and 47 of the tanks 31 and 33 of the second heat exchanger 23. The tube 35 is inserted through the tube insertion holes 53 and 55. The tube insertion holes 53 and 55 are formed perpendicular to the bottom surfaces 45 and 47 of the tanks 31 and 33 of the second heat exchanger 23.
[0018]
The tubes 29 and 35 are provided with fins 37 straddling both.
The tanks 25 and 27 of the first heat exchanger 21 and the tubes 29 and the tanks 31 and 33 of the second heat exchanger 23, the tubes 35 and the fins 37 are integrally brazed according to a standard method.
According to the present embodiment configured as described above, the first heat exchanger 21 and the second heat exchanger 23 are configured such that the vertical tangent lines of the tanks 31 and 33 of the second heat exchanger 23 are the first heat exchanger. Since it is located on the flat part 39 of the tanks 25 and 27, the tube pitch Lb of both the tubes 29 and 35 can be integrally formed. Therefore, as compared with the conventional integrated heat exchanger, there is no useless area of the fins 37 straddling both the tubes 29 and 35, and the thickness Wb of the core portion 63 is made thinner than that of the conventional integrated heat exchanger. Can do.
[0019]
In addition, since the tank 25 (27) of the first heat exchanger 21 and the tank 31 (33) of the second heat exchanger 23 are integrally extruded products made of aluminum, they are brazed as in the conventional example. There is no need. Therefore, when brazing the tank 25 (27) of the first heat exchanger 21 and the tank 31 (33) of the second heat exchanger 23, the troublesome work of aligning the two becomes unnecessary.
[0020]
FIG. 4 shows an embodiment of an integrated heat exchanger according to the inventions of claims 1, 2 , 4 , and 5 .
In this embodiment, the tank 25 (27) of the first heat exchanger 21 and the tank 31 (33) of the second heat exchanger 23 are specially formed.
In this embodiment, the same operational effects as those of the above-described embodiment can be obtained, except for the operational effects as an integrally extruded product made of aluminum.
[0021]
FIG. 5 shows a modification of the integrated heat exchanger shown in FIG.
In this example, a case where the tanks 31 and 33 of the second heat exchanger 23 are separated from the core portion 63 is shown.
In this example, as in the embodiment shown in FIG. 1, it is effective to eliminate the useless area of the fin 37 straddling both the tubes 29 and 31, but the tube 35 is provided in the area 36 (shown by hatching) where there is no fin 37. Is not preferable because it is a waste of the tube. This is because the heat radiation effect of the tube 35 alone is poor, and effective heat radiation cannot be expected unless the heat transfer action by the fins 37 is added.
[0022]
In the above-described embodiment, the case where the tanks 25 and 27 of the first heat exchanger 21 have a box cross-sectional shape has been described. However, in order to secure a contact portion with the tanks 31 and 33 of the second heat exchanger 23. If the flat portion 39 can be formed, the shape is not particularly limited. In particular, when the first heat exchanger 21 is used for a radiator, the pressure resistance is not required as compared with a capacitor, and the shape thereof is arbitrary.
[0023]
【The invention's effect】
As described above, in the first to fifth aspects of the invention, the first heat exchanger and the second heat exchanger are arranged so that the axis of each tube insertion hole is parallel to the tank of the first heat exchanger. Since the second heat exchanger is in contact with the flat portion, the heat radiating portion (core portion) can be made thin with a simple structure.
[0024]
In the third aspect of the invention, if the tank of the first heat exchanger and the tank of the second heat exchanger are made of an aluminum integrally extruded product, the brazing operation is not required as in the prior art.
Without brazing, problems such as water leakage due to brazing will not occur.
Furthermore, in the invention of claim 4, since the bottom surface of the tank of the first heat exchanger and the tank of the second heat exchanger can be flush with each other, the tube pitch can be reduced and the useless tube length can be eliminated. it can.
[Brief description of the drawings]
FIG. 1 is a plan view showing an embodiment of an integrated heat exchanger according to the first to fifth aspects of the present invention.
FIG. 2 is a cross-sectional view showing the tank of FIG.
FIG. 3 is a plan view showing a core part of FIG. 1;
FIG. 4 is a cross-sectional view showing another embodiment of the integrated heat exchanger according to the first , second, fourth , and fifth aspects of the invention.
FIG. 5 is a cross-sectional view showing a modification of FIG. 1;
FIG. 6 is a plan view showing a conventional integrated heat exchanger.
7 is a cross-sectional view of FIG.
FIG. 8 is an explanatory diagram of a conventional integrated heat exchanger.
FIG. 9 is an explanatory view of a tank of a conventional integrated heat exchanger.
[Explanation of symbols]
21 First heat exchanger 23 Second heat exchanger 25, 27, 31, 33 Tank 29, 35 Tube 37 Fin 39 Plane portion 41, 43, 45, 47 Bottom surface 49, 51, 53, 55 Tube insertion holes 49a, 51a , 53a, 55a

Claims (5)

Having a first heat exchanger (21) and a second heat exchanger (23);
The first heat exchanger (21) connects the tanks (25, 27) with a plurality of tubes (29),
The second heat exchanger (23) connects the tanks (31, 33) with a plurality of tubes (35),
In the integrated heat exchanger in which the fins (37) straddling both the tubes (29, 35) are arranged,
The tanks (25, 27) of the first heat exchanger (21) have a flat portion (39) on the side wall perpendicular to the bottom surfaces (41, 43) in which the plurality of tube insertion holes (49, 51) are formed. And
The tanks (31, 33) of the second heat exchanger (23) have a round cross-sectional shape, and have bottom surfaces (45, 47) for drilling a plurality of tube insertion holes (53, 55).
The first heat exchanger (21) and the second heat exchanger (23) are arranged so that the axis (49a, 51a, 53a, 55a) of each tube insertion hole (49, 51, 53, 55) is parallel. An integrated heat exchanger characterized in that the second heat exchanger (23) is brought into contact with the flat portion (39) of the tank (25, 27) of the one heat exchanger (21). The integrated heat exchanger according to claim 1, wherein
An integrated type characterized in that the tanks (25, 27) of the first heat exchanger (21) have a square cross-sectional shape and the tanks (31, 33) of the second heat exchanger (23) have a round cross-sectional shape. Heat exchanger. The integrated heat exchanger according to claim 1 or 2,
An integrated type characterized in that the tanks (25, 27) of the first heat exchanger (21) and the tanks (31, 33) of the second heat exchanger (23) are made of an integrally extruded product of aluminum. Heat exchanger. The integrated heat exchanger according to any one of claims 1 to 3,
The bottom surface (41, 43) of the tank (25, 27) of the first heat exchanger (21) and the bottom surface (45, 47) of the tank (31, 33) of the second heat exchanger (23) are flush with each other. An integrated heat exchanger characterized by The integrated heat exchanger according to any one of claims 1 to 4,
The tube insertion hole (49, 51) of the first heat exchanger (21) is provided closer to the second heat exchanger (23) than the center of the tank (25, 27) of the first heat exchanger (21). An integrated heat exchanger characterized by the above .

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