Heat management system for vehicle

A heat management system for a vehicle, the heat management system comprising:

• a front air conditioning unit configured to perform air conditioning of a front side space of a passenger compartment of the vehicle;
• a rear air conditioning unit configured to perform air conditioning of a rear side space of the passenger compartment;
• a battery cooling circuit configured to circulate a cooling liquid for cooling a battery from which power is supplied to an electric motor for driving the vehicle;
• a refrigeration cycle circuit configured to supply a refrigerant to the front air conditioning unit and the rear air conditioning unit and configured to supply the refrigerant to a battery cooling heat exchanger for exchanging heat between the cooling liquid of the battery cooling circuit and the refrigerant;
• and
• a heating circuit configured to produce a high temperature liquid using a heat source or the refrigerant of the refrigeration cycle circuit and configured to supply the high temperature liquid to the front air conditioning unit and the rear air conditioning unit,
• wherein, when the front air conditioning unit and the rear air conditioning unit are operating in a dehumidification heating operation region determined based on an outside air temperature and a demanded blowing air temperature representing a target value to which a temperature of air fed from the front air conditioning unit and the rear air conditioning unit is controlled, and when a demand to cool the battery is greater than or equal to a first demand value,
• the refrigeration cycle circuit performs cooling operation to supply the refrigerant to the front air conditioning unit, the rear air conditioning unit, and the battery cooling heat exchanger,
• the heating circuit produces the high temperature liquid using the heat source, and the battery cooling circuit cools the battery using the cooling liquid cooled by the refrigerant of the refrigeration cycle circuit through the battery cooling heat exchanger,
• wherein, when the demand to cool the battery is greater than or equal to a second demand value that is higher than the first demand value, and when an amount of electricity stored in the battery is less than a predetermined value, supply of the refrigerant to the front air conditioning unit and the rear air conditioning unit by the refrigeration cycle circuit is suspended.