Patent ID: 8607855
Filing Date: 2013-12-17
Classification: B60H,F25B

Abstract:
1. An air-conditioning system for a motor-driven vehicle, comprising: a first coolant circuit that includes a first pump and is configured to cool an engine, a second coolant circuit that includes a coolant/refrigerant heat exchanger, a second pump, and a waste heat exchanger, wherein the second coolant circuit is further configured to be either separate from or connected to the first coolant circuit depending on a state of a first valve and a state of a second valve, and a refrigerant circuit that includes a plurality of heat exchangers configured to conduct a refrigerant for an exchange of heat with air flowing through the plurality of heat exchangers of the refrigerant circuit and configured to operate as heaters or as evaporators as a function of an operating state of the air-conditioning system, wherein the plurality of heat exchangers of the refrigerant circuit include an interior space heat exchanger, an ambient heat exchanger and the coolant/refrigerant heat exchanger that is configured to exchange heat with the second coolant circuit, and wherein the refrigerant circuit further includes a compressor, and wherein the ambient heat exchanger and the coolant/refrigerant heat exchanger are arranged in series in the refrigerant circuit and are separated from the interior space heat exchanger by an expansion element such that, during a heat operation and in order to absorb heat from the surroundings, refrigerant flows from the compressor, then through the interior space heat exchanger, then through the expansion element, then through the ambient air heat exchanger, and then through the coolant/refrigerant heat exchanger.