| 摘要 |
PROBLEM TO BE SOLVED: To eliminate blowing temperature difference by site and to effectively utilize a calorific value of an electric heating element 331 to the maximum. SOLUTION: When the heat generation temperature of a heater core 13 is low at heating air, energization is performed to a plurality of energization heat generation element rows 33A-33D and when the heat generation temperature of the heater core 13 is raised, energization is successively disconnected from the energization heat generation element rows 33A-33D corresponding to portions where rising of the heat generation temperature of the heater core 13 is quick. According to this, air temperature distribution after it passes through a PTC heater 30 can be approximately made uniform regardless of a passing position by performing energization to the energization heat generation element rows 33A-33D by making corresponding to temperature inclination of the heater core 13 and the temperature difference of blowing air based on the position can be reduced. Further, the calorific value of the energization heat generation element rows 33A-33D can be effectively utilized for heating the inside of a cabin to the maximum. COPYRIGHT: (C)2006,JPO&NCIPI
|
