Vehicle air conditioning unit with an air-conditioning function

Details Vehicle air conditioning unit with an air-conditioning function Vehicle air conditioning unit with an air-conditioning function

1998-07-06

1999-08-03

Bennett, Henry

Refrigeration

Processes

Circulating external gas

621766, 62178, 62186, 62244, 236 493, 236 91C, F25D 1706

Patent

active

059310065

ABSTRACT:
An air-conditioning unit is provided for a vehicle with an air-conditioning function depending on the outside dew point. The air-conditioning unit includes a device for determining the dew point temperature of the outside air, an air duct leading to a window of the vehicle and having a controllable closing device, a device for determining the temperature of the air blown through the ducts leading to the window of the vehicle and a control device for automatically opening and closing the air duct leading to a window of the vehicle by appropriately energizing the air duct closing device. The control device, in the cooling operation of the air conditioning unit, opens and closes this air duct automatically as a function of the dew point temperature determined for the outside air and as a function of the temperature determined for the air blown out through this air duct. The air duct is kept closed by the control device as long as the temperature of the air blown out is lower than the dew point temperature of the outside air plus a specifiable safety offset temperature, and is otherwise kept open at least partially.

REFERENCES:
patent: 4709751 (1987-12-01), Ichimaru et al.
patent: 4730662 (1988-03-01), Kobayashi
patent: 4852363 (1989-08-01), Kampf et al.
patent: 4896589 (1990-01-01), Takahashi
patent: 4917293 (1990-04-01), Fedter et al.
patent: 4920755 (1990-05-01), Tadahiro
patent: 5570838 (1996-11-01), Davis, Jr. et al.
patent: 5701752 (1997-12-01), Tsunokawa et al.

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