	US 7,600,561 B2
	Method for air conditioning a motor vehicle
Roland Caesar, Stuttgart (Germany); Jan Gaertner, Stuttgart (Germany); and Juergen Wertenbach, Fellbach (Germany)
Assigned to Daimler AG, Stuttgart (Germany)
Appl. No. 10/539,942 PCT Filed Dec. 03, 2003, PCT No. PCT/EP03/13630 § 371(c)(1), (2), (4) Date Jun. 17, 2005, PCT Pub. No. WO2004/058526, PCT Pub. Date Jul. 15, 2004.
Claims priority of application No. 102 61 179 (DE), filed on Dec. 20, 2002.
Prior Publication US 2006/0169790 A1, Aug. 03, 2006
Int. Cl. B60H 1/00 (2006.01)

U.S. Cl. 165—202 [165/222; 165/223; 165/230; 62/244]

6 Claims

1. A method for air conditioning a passenger compartment of a vehicle, said method comprising:

providing heat from a passenger compartment heat exchanger to the passenger compartment through heat pump operation of a refrigerating circuit (1) comprising a compressor (2) for pressurizing an automobile refrigerant, a condenser (3), a throttle valve (4) and an evaporator (5) used as a passenger compartment heat exchanger;

measuring the temperature in the passenger compartment with a temperature sensor;

measuring the atmospheric humidity in the passenger compartment with a humidity sensor; and

when the temperature is in a predefined range and the atmospheric humidity reaches a defined threshold:

controlling throttle valve (4) by signals from the temperature and humidity sensors to throttle the mass flow of refrigerant in the circuit upstream of the passenger compartment heat exchanger (5), in such a manner that the moisture contained in the air stream passing the passenger compartment heat exchanger (5) is at least substantially condensed at the passenger compartment heat exchanger (5), and the moisture which has already condensed at the heat exchanger (5) remains at the heat exchanger (5), and

heating the passenger compartment by a heat source which is outside the circuit (1) until the temperature in the passenger compartment exceeds an upper limit temperature of the predefined range.