Anti-fog controller for reversible air conditioning and heat pum

Details Anti-fog controller for reversible air conditioning and heat pum Anti-fog controller for reversible air conditioning and heat pum

1998-11-12

2000-05-09

Wayner, William

Heat exchange

With timer, programmer, time delay, or condition responsive...

Having heating and cooling capability

622284, 236 91C, 454121, 454 75, F25B 2900, G05B 2300

Patent

active

060590270

ABSTRACT:
A method of controlling fogging in vehicles having a reversible HVAC system. First, the method detects if conditions for fogging exist such as moisture or localized coldspots on the inside heat exchanger. Then, the speed of the compressor is gradually increased, causing the discharge temperature of the refrigerant to increase at a controlled rate. As the temperature of the refrigerant increases, the temperature of the inside heat exchanger increases. Moisture that exists on the inside heat exchanger slowly begins to evaporate into the air passing through the heat exchanger into the passenger compartment. The moisture laden air flows through the passenger compartment and exits through door seal cracks and outlet vents to the outside environment. After a predetermined period of time, the moisture on the inside heat exchanger has evaporated, so the compressor speed is increased to its steady-state speed.

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