Fuel cell system

Details Fuel cell system Fuel cell system

2007-07-05

2008-12-09

Maples, John S (Department: 1795)

Chemistry: electrical current producing apparatus, product, and

With pressure equalizing means for liquid immersion operation

C429S006000

Reexamination Certificate

active

07462414

ABSTRACT:
A fuel cell system has a fuel cell, an air-refrigerant heat exchanger, and primary and secondary expansion valves. The air-refrigerant heat exchanger performs heat exchange between exhaust air discharged from the fuel cell and a refrigerant in a refrigeration cycle. The primary expansion valve reduces the pressure of the refrigerant at an upstream side of the air-refrigerant heat exchanger. The secondary expansion valve reduces the pressure of the refrigerant at a downstream side of the air-refrigerant heat exchanger. While the air-refrigerant heat exchanger performs the heat-exchange from the air to the refrigerant, the primary expansion valve controls a reduced magnitude of the pressure of the refrigerant so that a temperature of the refrigerant is set to a specified value within a range of 0° C. to 5° C., preferably set to 0° C., at which water component contained in the air does not freeze.

REFERENCES:
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patent: 7040109 (2006-05-01), Kimbara et al.
patent: 2002/0114985 (2002-08-01), Shkolnik et al.
patent: A 2002-005532 (2002-01-01), None
patent: A 2002-280006 (2002-09-01), None
patent: A 2005-511373 (2005-04-01), None
patent: 2005-178524 (2005-07-01), None

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