Automotive HVAC system and method of operating same...

Refrigeration – Automatic control – By accumulation on freezing surface – e.g. – ice

Reexamination Certificate

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Details

C062S244000

Reexamination Certificate

active

07131281

ABSTRACT:
The present invention concerns a method for cooling a passenger compartment in a hybrid vehicle that operates an engine intermittently during vehicle operation, the hybrid vehicle having an HVAC system including an HVAC duct, a blower adapted to direct a flow of air through the HVAC duct, and an evaporator located within the HVAC duct. The method includes the steps of operating the blower; operating the compressor; allowing a predetermined amount of ice to form on the evaporator during operation of the compressor; turning off the vehicle engine; ceasing operation of the compressor; measuring an indicator corresponding to a remaining amount of the predetermined amount of ice formed on the evaporator; and re-starting the compressor when a predetermined air temp in air duct is reached.

REFERENCES:
patent: 2128021 (1938-08-01), Smith
patent: 2170992 (1939-08-01), Grady
patent: 3059449 (1962-10-01), Dilliner
patent: 4193271 (1980-03-01), Honigsbaum
patent: 6539727 (2003-04-01), Burnett
patent: 6708512 (2004-03-01), Kitamura et al.

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