AUXILIARY HEATER FOR VEHICLE AND HEATING AND COOLING SYSTEM USING THE SAME

摘要

PURPOSE: An auxiliary heater for a vehicle and a heating and cooling system using the same are provided to control a high pressure side without changing pressure of refrigerant discharged by a compressor. CONSTITUTION: An auxiliary heater includes a compressor(10) compressing refrigerant; a condenser(30) condensing refrigerant compressed by the compressor; an expansion valve(40) throttling and expanding introduced refrigerant; an evaporator(50) allowing introduced refrigerant to exchange heat with air; a first refrigerant circulation circuit(1) connected to allow refrigerant discharged from the compressor to pass the condenser, the expansion valve and the evaporator and return to the compressor; a second refrigerant circulation circuit(2) connected to allow refrigerant discharged from the compressor to bypass the condenser, pass the expansion valve and the evaporator, and return to the compressor; and a refrigerant distribution control unit controlling refrigerant to be distributed to and circulated in the first refrigerant circulation circuit and the second refrigerant circulation circuit in fixed ratio at heating mode.