| 摘要 |
<p>PURPOSE: A heat pump system for vehicles is provided to perform defrosting by supplying a part of the refrigerant supplied to a heat supply member to an evaporator along a first bypass line by opening a branch line and by performing a refrigerant heating mode when it is recognized what an outdoor heat exchanger is frosted. CONSTITUTION: A refrigerant circulating through a refrigerant circulation line (R) circulates an outdoor heat exchanger (130) and a heat supply member (180) of a first bypass line (R1) in a heat pump mode. A control unit performs defrosting and supplies a part of the refrigerant supplied to a heat supply member along the first bypass line to an evaporator (160) by opening a branch line (R4) with an opening/closing valve (195) when it is recognized what the outdoor heat exchanger is frosted by a frosting recognition member in a heat pump mode. The control unit performs a refrigerant heating mode increasing a temperature of the refrigerant circulating through the system. [Reference numerals] (AA) Indoor air comes in</p> |
