Air conditioner for vehicle

Abstract

Abstract PURPOSE: To prevent variations of blow-off temperature, by obtaining correction value of the open degree of an air mixing door in each condition of air intake on the basis of disired blow-off temperature calculated by equilibrium performance expression of heat quantity in an air conditioner which sucks ambient air. CONSTITUTION: A desired blow-off temperature TAC is obtained from set room temperature TO, ambient temperature TA and room temperature TR in a performance circuit 41 of desired blow-off temperature. Then, the open degree X of an air mixing door is obtained by an expression I through the blow-off temperature TH wherein the air mixing door is opened completely and the blow-off temperature TL wherein the air mixing door is closed completely, in accordance with each signal of the operation switch 33 of a compressor and an intake door switch 34. Here, the open degree X is obtained by substituting each value of Te which is fixed from the characteristic in place of TL when the switch 33 is turned-on, TA 1 when the switch is turned-off and the air mixing door is in the mode of introducing ambient air, and TR 1 when the air mixing door is in the mode of recirculating inside air. COPYRIGHT: (C)1982,JPO&Japio

Inventors

• 👤 Tetsuya Iijima
• 👤 Seiichi Takahashi

Bibliographic Details