Air conditioning system for preventing fogging of vehicle window

Details Air conditioning system for preventing fogging of vehicle window Air conditioning system for preventing fogging of vehicle window

1981-12-23

1983-11-01

Makay, Albert J.

Refrigeration

Automatic control

Refrigeration producer

62150, 62227, 236 91F, 98 209, F25B 4100, B60H 100

Patent

active

044124244

ABSTRACT:
An air conditioning system for preventing the fogging of vehicle windows includes a defroster switch which is closed to turn on a compressor when the temperature at or around the surfaces of an evaporator drops down to a predetermined off mode level. When the temperature outside the vehicle passenger compartment drops from a relatively high level to a first predetermined level, the off mode level becomes saturated to a constant (maximum) level. As the outside temperature further drops to reach a predetermined second temperature level, the off mode level is progressively lowered from the maximum level to a lower level. With this control, the compressor is turned on again after being closed by closing of the defroster switch, thereby permitting the vehicle windows to be cleared of the fogging from their inner surfaces.

REFERENCES:
patent: 4209994 (1980-07-01), Mueller et al.
patent: 4289272 (1981-09-01), Marase et al.
patent: 4356705 (1982-11-01), Sutoh et al.

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