HEAT PUMP SYSTEM FOR VEHICLE

摘要

The present invention relates to a heat pump system for a vehicle and, more specifically, relates to a heat pump system for a vehicle, comprising: a refrigerant-coolant heat exchanger that exchanges heat between refrigerant circulating a refrigerant circulation line and coolant circulating vehicle electronic units; a first refrigerant circulation line, at the upstream side of an outdoor heat exchanger, on which the refrigerant-coolant heat exchanger is disposed; and a second refrigerant circulation line, at the downstream side of the outdoor heat exchanger, on which the refrigerant-coolant heat exchanger is disposed. Therefore, in an air conditioning mode, the refrigerant releases heat to the coolant and external air through the refrigerant-coolant heat exchanger and the outdoor heat exchanger, thereby enhancing cooling performance without an increase in size of the outdoor heat exchanger, and in a heat pump mode, the refrigerant is heated by absorbing heat from the external air and coolant (waste heat generated from the electronic units) through the outdoor heat exchanger and the refrigerant-coolant heat exchanger, thereby enhancing heating performance. In addition, since the waste heat generated from the electronic units is recovered through the refrigerant-coolant heat exchanger, a heat pump can be driven even when the temperature of external air is lower than or equal to zero degree or frost is generated on the outdoor heat exchanger, thereby further enhancing heating performance and efficiency.