Klimatisierungssystem und Leitungsvorrichtung zur Verhinderung von Wärmezufuhr durch die Wärmeabgabe des Motorraums

摘要

A concentric tubing apparatus (68) prevents heat gain in an air conditioning system (12). The heat gain results from heat generated in an engine compartment of a vehicle. To accomplish this, the tubing apparatus includes a first and second refrigerant tubes (36, 38). The first refrigerant tube is in fluid communication with a receiver and an evaporator (18) of the air conditioning system (12) to accommodate the flow of the refrigerant from the receiver (10) to the evaporator, and the second refrigerant tube is in fluid communication with the receiver (10) and the evaporator to accommodate the flow of the refrigerant from the evaporator to the receiver (10) . The second refrigerant tube is disposed concentrically about the first refrigerant tube such that the second refrigerant tube insulates the refrigerant flowing in the first refrigerant tube from the heat generated in the engine compartment. Thus, heat gain in the refrigerant flowing in the first refrigerant tube to the evaporator is prevented.