Heat recovery ventilator with defrost

Details Heat recovery ventilator with defrost Heat recovery ventilator with defrost

2011-05-17

2011-05-17

Jiang, Chen-Wen (Department: 3784)

Heat exchange

Heating and cooling

Heating and cooling of the same material

C165S054000, C165S059000

Reexamination Certificate

active

07942193

ABSTRACT:
A defrost system for a heat recovery ventilator/energy recovery ventilator (HRV/ERV), uses the interior space supply air of an integrated fan coil for defrosting a HRV/ERV core without creating negative pressure in the interior space, which wastes energy, without need of an external fifth port from which to draw defrost air from the interior space, which increases costs, and without re-circulating exhaust air into the interior space. During the defrost cycle, automatically controlled dampers close off the fresh air and exhaust air inputs, and exhaust output, and circulate supply air through the heat exchange core and into to the living space.

REFERENCES:
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patent: 5257736 (1993-11-01), Roy
patent: 5855320 (1999-01-01), Grinbergs
patent: 6169849 (2001-01-01), Schmidt
patent: 7073566 (2006-07-01), Lagace et al.
patent: 2005/0000681 (2005-01-01), Gagnon et al.
patent: 2007/0084586 (2007-04-01), Poirier
International Search Report, PCT/CA2008/002035, Feb. 19, 2009.

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