Patent ID: 6932148
Filing Date: 2005-08-23
Classification: B60H,F25B

Abstract:
1. In a truck having a cab, a sleeper compartment, a sleeper compartment air conditioning and heating assembly that is powered by a main engine of the truck, the improvement comprising: an auxiliary power unit housing mounted to a frame of the truck; an auxiliary engine mounted in the auxiliary housing; a compressor mounted to and driven by the auxiliary engine; a condenser mounted in the housing in fluid communication with refrigerant compressed by the compressor; an evaporator and heater housing carried by the truck; an auxiliary evaporator in the evaporator and heater housing in fluid communication with refrigerant condensed by the condenser; an auxiliary heater element in the evaporator and heater housing; an auxiliary duct leading from the auxiliary evaporator and heater housing to a junction with the sleeper compartment air conditioning and heating assembly; an auxiliary blower mounted adjacent the auxiliary evaporator and auxiliary heater element for moving air through the auxiliary evaporator and auxiliary heater element and through the auxiliary duct into the sleeper compartment air conditioning and heating assembly; and a valve having a first position that blocks air flow from the sleeper compartment air conditioning and heating assembly into the auxiliary duct while the sleeper compartment air conditioning and heating system is operating and a second position that blocks air flow from the auxiliary duct into the sleeper compartment air conditioning and heating system while the sleeper compartment air conditioning and heating system is not operating.