Vehicle air-conditioning device

An air conditioner for use in a dual air conditioner type vehicle system, said air conditioner comprising:

• a front air conditioning unit at a front of a vehicle compartment;
• a rear air conditioning unit at a rear of the vehicle compartment, said rear air conditioning unit comprising:
• a case defining an air passage and an intake for supplying air to said air passage;
• a blower for blowing said air through said air passage, said blower having a high speed setting and a low speed setting;
• a heating heat exchanger disposed within the case for heating said air;
• a foot blow path to blow air heated by said heating heat exchanger to feet of passengers in said rear of the vehicle compartment;
• a cool air bypass path defined by said case to bypass a flow of cool air around said heating heat exchanger;
• a cool air bypass door movable between a fully open position to pen said cool air bypass path and a closed position to close said bypass path;
• and
• a control for said cool air bypass door, said control keeping said cool air bypass door in said closed position when said blower is at said high speed setting, said control keeping said cool air bypass door in said fully open position when said blower is at said low speed setting and said foot blow path is opened.