Heater for the passenger or driver compartment of a train car

Abstract

A system for heating a compartment of a rail car having a heat-generating engine with a cooling-water system has system has a heat pump having a compressor, a condenser, an evaporator, and an expansion valve connected in a closed circuit, and a waste-air fan and ductwork feeding a stream of gas carrying waste heat generated by or in the rail car through the evaporator.

I claim: 
     
         1 . A system for heating a compartment of a rail car having a heat-generating engine with a cooling-water system, the system comprising:
 a heat pump having a compressor, a condenser, an evaporator, and an expansion valve connected in a closed circuit; and   a waste-air fan and ductwork feeding a stream of gas heated by the rail car through the evaporator.   
     
     
         2 . The heating system defined in  claim 1 , wherein the rail car has a motor with a water-cooling system, the system further comprising:
 a radiator juxtaposed with the condenser and connected in the water-cooling system of the motor; and   a fan in the heat pump blowing air through the radiator and the condenser.   
     
     
         3 . The heating system defined in  claim 2 , wherein the radiator is between the condenser and the fan of the heat pump.