Heat exchange – With impeller or conveyor moving exchange material – Mechanical gas pump
Reexamination Certificate
1999-03-16
2001-03-06
Lazarus, Ira S. (Department: 2835)
Heat exchange
With impeller or conveyor moving exchange material
Mechanical gas pump
C165S080300, C165S185000, C361S695000, C361S697000
Reexamination Certificate
active
06196302
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to a heat sink with multi-layer dispersion space, particularly to a heat sink in a new structure that can raise efficiency of heat dispersion.
A cooling fan is usually installed directly on a heat sink to expel hot air through lateral channels for cooling down a CPU, however, as the heat produced by the CPU is concentrated at the contact face of the CPU and the heat sink, while most of the airflow produced by the cooling fan can hardly blow on abovesaid contact face; and moreover the adopted open type heat sink cannot keep the cooling airflow long enough, so that the combined cooling device can only attain a limited cooling efficacy.
SUMMARY OF THE INVENTION
The heat sink of this invention is composed of a plurlity of heat dispersion posts that form a lot of zigzag space which is further partitioned or directly molded to form an upper and a lower flowing layer. The lower flowing layer is provided with a cooling fan for sucking airflow from the upper flowing layer to enter the lower flowing layer and blow directly on the CPU to expel the hot air inside to achieve a high efficiency heat dispersion.
By realizing the multi-layer flowing mechanism, the heat dispersion area is increased and the cooling air is blowing on the CPU directly and confined by the zigzag space to stay longer, so that a better heat dispersion efficacy can be obtained.
Advantages of this invention may be summarized as:
1. Application of the zigzag space can increase heat dispersion area and confine the cooling air to stay longer thereby raising heat dispersion efficacy.
2. Design of twin fans and stopping plates facilitate a proper blockade and guidance for concentrating the cooling air to blow on the contact face of the CPU.
3. Operation of the cooling fan in a sealed space will reduce noise and enhance air supply.
REFERENCES:
patent: 3766977 (1973-10-01), Pravda et al.
patent: 5504650 (1996-04-01), Katsui et al.
patent: 5609201 (1997-03-01), Anderson et al.
patent: 5638895 (1997-06-01), Dodson
patent: 5785116 (1998-07-01), Wagner
patent: 5787971 (1998-08-01), Dodson
patent: 5896917 (1999-04-01), Lemont et al.
patent: 6043980 (2000-03-01), Katsui
Birch & Stewart Kolasch & Birch, LLP
Duong Tho
Lazarus Ira S.
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