Vehicular air conditioner

A vehicular air conditioner comprising:

• a main heat exchanger;
• an auxiliary heat exchanger;
• a first controller configured to control said main heat exchanger;
• a second controller configured to control said auxiliary heat exchanger,
• the main heat exchanger comprising:
• a hot heat generating portion;
• a cold heat generating portion;
• and
• an introduced air switching portion configured to switch between inside air inside a vehicle interior and outside air outside the vehicle interior as air introduced to at least one of said hot heat generating portion and said cold heat generating portion,
• the main heat exchanger being configured to cause the introduced air to pass through at least one of said hot heat generating portion and said cold heat generating portion to flow into the vehicle interior, the main heat exchanger having a plurality of operation modes to be selected,
• the auxiliary heat exchanger comprising:
• a condenser configured to radiate heat to the surroundings from refrigerant exhausted from a compressor;
• and
• an evaporator configured to absorb heat from the surroundings to the refrigerant exhausted from said condenser and expanded by an expansion valve,
• the condenser and the evaporator constituting an integral block,
• wherein the vehicle comprises a ventilation heat exhausting passage configured to exhaust the inside air from the inside of the vehicle to the outside of the vehicle as ventilation air, the auxiliary heat exchanger being separate from said main heat exchanger and constituting a part of the ventilation heat exhausting passage,
• the auxiliary heat exchanger configured to selectively perform heat exchange of the inside air with one of said condenser and said evaporator depending on the operation mode of the main heat exchanger, and to exhaust air-conditioned air to the vehicle interior,
• wherein said auxiliary heat exchanger further comprises:
• a condenser heat exchange switching portion configured to selectively switch among an inside air heat exchanging state in which said condenser performs heat exchange with the inside air inside the vehicle interior;
• an outside air heat exchanging state in which said condenser performs heat exchange with the outside air outside the vehicle interior;
• and a ventilation heat exchanging state in which said condenser performs heat exchange with the ventilation air exhausted to the outside of the vehicle interior through said heat exhausting passage, and
• an evaporator heat exchange switching portion configured to selectively switch among an inside air heat exchanging state in which said evaporator performs heat exchange with the inside air inside the vehicle interior;
• an outside air heat exchanging state in which said evaporator performs heat exchange with the outside air outside the vehicle interior;
• and a ventilation heat exchanging state in which said evaporator performs heat exchange with the ventilation air exhausted from the inside of the vehicle interior to the outside of the vehicle interior through said heat exhausting passage, and
• wherein said second controller is configured to control said condenser heat exchange switching portion and the evaporator heat exchange switching portion depending on the operation mode of the main heat exchanger,
• wherein when the operation mode of the main heat exchanger is a mode performing heating with said introduced air switching portion of said main heat exchanger introducing the inside air, said second controller controls said condenser heat exchange switching portion such that said condenser shifts to said inside air heat exchanging state, and controls said evaporator heat exchange switching portion such that said evaporator shifts to said outside air heat exchanging state.