Heat exchange – Three non-communicating fluids
Reexamination Certificate
1998-02-03
2001-05-15
Leo, Leonard (Department: 3743)
Heat exchange
Three non-communicating fluids
C165S051000
Reexamination Certificate
active
06230793
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an integral type heat exchanger in which a radiator and a condenser are arranged adjacent to each other, and corrugated fins arranged in a core section of the radiator and condenser are jointly used for both radiator and condenser.
2. Description of the Related Art
Recently, they have developed an integral type heat exchanger in which a condenser for a refrigeration system is connected with a radiator on the front surface of the radiator.
FIGS. 7
to
9
are views showing this integral type heat exchanger. In this integral type heat exchanger, the condenser
1
is arranged on the front surface of the radiator
2
.
The condenser
1
includes: an upper condenser tank
3
; a lower condenser tank
4
opposed to the upper condenser tank
3
; and a core section
5
arranged between the upper condenser tank
3
and the lower condenser tank
4
. The radiator
2
includes: an upper radiator tank
6
; a lower radiator tank
7
opposed to the upper radiator tank
6
; and a core section
5
arranged between the upper radiator tank
6
and the lower radiator tank
7
.
In this integral type heat exchanger, both tubes
17
used for the condenser and tubes
8
used for the radiator are arranged in the core section
5
, and wide corrugated fins
9
are attached to both tubes
17
and
8
, so that the corrugated fins
9
are jointly used for both the tubes
17
and
8
.
The cooling water inflow pipe
10
is open to the upper radiator tank
6
of the radiator
2
, and the cooling water outflow pipe
11
is open to the lower radiator tank
7
.
The refrigerant inflow pipe
12
and the refrigerant outflow pipe
13
are open to the upper condenser tank
3
of the condenser
1
. As shown in
FIG. 9
, dividing members
14
,
15
,
16
to divide the insides of the condenser tanks
3
,
4
are arranged in the upper condenser tank
3
and the lower condenser tank
4
.
In the radiator
2
of the above integral type heat exchanger, as shown in
FIG. 8
, cooling water flows into the upper radiator tank
6
from the cooling water inflow pipe
10
. Cooling water is cooled while it is flowing in the tubes
8
. Then, cooling water flows into the lower radiator tank
7
and is discharged outside from the cooling water outflow pipe
11
.
On the other hand, as shown in
FIG. 9
, refrigerant flows in the condenser
1
as follows. Refrigerant flows from the refrigerant inflow pipe
12
into the condenser tank
3
and passes in the tubes
17
. Then refrigerant flows into the lower condenser tank
4
. Refrigerant repeatedly flows into the upper condenser tank
3
and the lower condenser tank
4
through the tubes
17
by the action of the dividing members
14
,
15
,
16
. While refrigerant is flowing in the tubes
17
, it is cooled and finally discharged outside from the refrigerant outflow pipe
13
of the upper condenser tank
3
.
Since the refrigerant outflow pipe
13
is arranged in the upper condenser tank
3
in the above condenser
1
, only liquid refrigerant, which has been sufficiently condensed, can flow out from the refrigerant outflow pipe
13
.
However, the following problems may be encountered in the above conventional integral type heat exchanger. In the above integral type heat exchanger, the corrugated fins
9
are jointly used in the core section
5
of the radiator
2
and the condenser
1
. The cooling water inflow pipe
10
into which cooling water of relatively high temperature flows is arranged in the upper radiator tank
6
, and the refrigerant outflow pipe
13
from which cooled and condensed refrigerant flows out is arranged in the upper condenser tank
3
. Therefore, in the upper portion of the core section
5
, heat is transmitted from the cooling water of relatively high temperature in the radiator
2
to the refrigerant of relatively low temperature which has been cooled and condensed by the condenser
1
. Due to the transmission of heat, the cooling performance of the condenser
1
is deteriorated.
SUMMARY OF THE INVENTION
The above problems can be solved by the present invention. It is an object of the present invention to provide an integral type heat exchanger by which the deterioration of cooling performance of the condenser caused by the thermal influence of cooling water flowing in the radiator can be greatly reduced as compared with the integral type heat exchanger of the conventional art.
In an integral type heat exchanger according to the present invention, first and second radiator tanks are opposed to each other, and first and second condenser tanks are opposed to each other. The first radiator tank is adjacent to the first condenser tank, and the second radiator tank is adjacent to the second condenser tank. A core section is arranged between the first and second radiator tanks and between the first and second condenser tanks so as to be common between the radiator tanks and condenser tanks. A cooling water flows from the first radiator tank into the second radiator tank through the core section at least in one direction, and a refrigerant flows between the first and second condenser tanks through the core section repeatedly. And a final flowing direction of the refrigerant in the core section conforms with a flowing direction of the cooling water.
The above integral type heat exchanger preferably includes a cooling water inflow pipe being open to the second radiator tank, a cooling water outflow pipe being open to the first radiator tank, and a refrigerant outflow pipe being open to the first condenser tank.
In the radiator in the integral type heat exchanger according to the present invention, cooling water flows into the second radiator tank from the cooling water inflow pipe. While cooling water is flowing in the tubes, it is cooled. After that, cooling water flows into the first radiator tank and flows out from the cooling water outflow pipe.
On the other hand, in the condenser, refrigerant flows from the refrigerant inflow pipe into the first or the second condenser tank. After that, it is cooled while it is flowing in the tubes. Finally, refrigerant flows outside from the refrigerant outflow pipe of the first condenser tank opposed to the first radiator tank.
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patent: 5000257 (1991-03-01), Shinmura
patent: 5033540 (1991-07-01), Tategami et al.
patent: 5036910 (1991-08-01), Wolf
patent: 5080167 (1992-01-01), Wolf
patent: 5163507 (1992-11-01), Joshi
patent: 5186243 (1993-02-01), Halstead
patent: 5186246 (1993-02-01), Halstead
patent: 5529116 (1996-06-01), Sasaki et al.
patent: 5671803 (1997-09-01), Tepas et al.
patent: 5720341 (1998-02-01), Watanabe et al.
patent: 5915490 (1999-06-01), Wurfel
patent: 0 367 078 (1990-05-01), None
patent: 0 677 716 (1995-10-01), None
patent: 202084 (1986-09-01), None
patent: 247990 (1989-10-01), None
Calsonic Kansei Corporation
Leo Leonard
Sughrue Mion Zinn Macpeak & Seas, PLLC
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