Heat exchange – With impeller or conveyor moving exchange material – Mechanical gas pump
Reexamination Certificate
1999-10-13
2001-06-19
Flanigan, Allen (Department: 3743)
Heat exchange
With impeller or conveyor moving exchange material
Mechanical gas pump
C165S104340, C165S164000, C361S696000
Reexamination Certificate
active
06247526
ABSTRACT:
CROSS-REFERENCE TO RELATED APPLICATION
This application is related to and claims priority from Japanese Patent Application No. Hei. 10-329497 filed on Nov. 19, 1998, the contents of which are hereby incorporated by reference.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a cooling device for cooling high-temperature air by performing heat exchange between high-temperature air and low-temperature air flowing adjacent to each other. More particularly, the present invention relates to a cooling device with an arrangement of a centrifugal fan.
2. Description of Related Art
In a conventional cooling device, high-temperature air within a sealed space accommodating a heat radiation member such as an electrical machine is heat-exchanged with low-temperature air so that temperature of the sealed space is restricted from being increased.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a device in which a first passage through which a first fluid flows and a second passage through which a second fluid flows are arranged adjacent to each other, while the first fluid and the second fluid are uniformly introduced into the first and second passages, respectively.
It is an another object of the present invention to provide a cooling device which effectively cools a first fluid within a sealed space for accommodating a heat radiation member by performing heat-exchange between the first fluid and a second fluid outside the sealed space.
According to a first aspect of the present invention, a device for performing heat exchange between a first fluid and a second fluid includes a heat exchanger having a first passage through which the first fluid flows and a second passage through which the second fluid flows, a first case for forming a first space communicating with the first passage on an upstream side of the first passage, and a first centrifugal fan for blowing the first fluid into the first passage of the heat exchanger. The first passage and the second passage are arranged adjacent to each other in the heat exchanger, and the first centrifugal fan is disposed and rotated in the first space at one side shifted from a center so that the first fluid is blown toward the other side of the first space opposite to the one side. Thus, a large air-blowing space is formed in the first space on a side of the first centrifugal fan. As a result, the first fluid uniformly flows into the first passage through the large air-blowing space.
Preferably, the device further includes a second case for forming a second space communicating with the second passage on an upstream side of the second passage, and a second centrifugal fan for blowing the second fluid into the second passage of the heat exchanger. Further, the second centrifugal fan is disposed in the second space at one side shifted from a center, and is rotated so that the second fluid is blown toward the other side of the second space opposite to the one side. Thus, a large air-blowing space is formed in the second space, and the second fluid uniformly flows into the second passage through the large air-blowing space.
According to a second aspect of the present invention, in a device for performing a heat exchange between a first fluid and a second fluid, plural first centrifugal fans for blowing the first fluid into a first passage of a heat exchanger are arranged in a first space upstream from the first passage, and are operated in the same rotation direction with different output power, so that each output power from the first centrifugal fans is decreased in order toward an air-blowing direction of the first centrifugal fans. Thus, the first fluid can be uniformly introduced into the first passage through the first space.
Preferably, plural second centrifugal fans for blowing the second fluid into a second passage of the heat exchanger are arranged in a second space upstream from the second passage, and are operated in the same rotation direction with different output power, so that each output power from the second centrifugal fans is decreased in order toward an air-blowing direction of the second centrifugal fans. Thus, both the first fluid and second fluid can be uniformly introduced into the first and second passage of the heat exchange, respectively, and heat-exchanging performance of the heat exchanger can be improved.
More preferably, the first fluid has temperature higher than that of the second fluid. Therefore, the device can be used as a cooling device for cooling the first fluid. Because the first fluid and the second fluid respectively uniformly passes through the first and second passages adjacent to each other, the first fluid flowing though the first passage can be effectively cooled in the heat exchanger by the second fluid flowing through the second passage.
REFERENCES:
patent: 3559728 (1971-02-01), Lyman et al.
patent: 4386651 (1983-06-01), Reinhard
patent: 2231469 (1974-03-01), None
patent: 2744664 (1979-04-01), None
patent: 2743708 (1979-04-01), None
patent: 2576679 (1986-08-01), None
Kawaguchi Kiyoshi
Kishita Koji
Mafune Toshihiro
Okamoto Yoshiyuki
Sugito Hajime
Denso Corporation
Flanigan Allen
Harness Dickey & Pierce PLC
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