Ventilating system, heat exchanger and methods

Details Ventilating system, heat exchanger and methods Ventilating system, heat exchanger and methods

2006-01-10

2006-01-10

Ford, John K. (Department: 3753)

Heat exchange

Structural installation

Related to wall, floor or ceiling structure of a chamber

C165S165000, C165S166000, C165S167000, C165S909000

Reexamination Certificate

active

06983788

ABSTRACT:
The ventilating system includes evaporative cooling of the exhaust air before it enters a heat exchanger to cool incoming fresh outside air. A suction fan pulls exhaust air through the heat exchanger and, in combination with a flow restrictor, reduces the pressure on the exhaust air and augments the evaporative cooling. The use of a pusher fan to force outside air through the heat exchanger ensures that any leakage in the heat-exchanger results in outside air entering exhaust air and minimizing the chances of contamination by leaking exhaust air into the incoming fresh air. The heat exchanger is made economically by heat-forming cavities in relatively thick thermo-plastic sheets, interleaving them with other thermoplastic sheets having separate gas flow conduit structures, and securing the sheets together. Preferably, the heat-exchanger is an opposed-flow heat-exchanger giving improved heat-transfer efficiency.

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