| 摘要 |
PURPOSE:To prevent a rapid change in blowing air temperature and enable stable temperature control to be performed by a method wherein opening and closing of a hot water valve is controlled in response to the blowing air temperature and a degree of opening of air mixing door when a mode is changed over to a floor mode. CONSTITUTION:An output negative pressure of a transducer 13 is controlled by a control circuit 8 in such a way as a difference between both outputs from a room temperature sensor 8a and a temperature setting device 8b becomes zero, thereby an actuater 5 is operated to control a position of the air mixing door 4. In such a device as above, a control valve 11 is installed in a hot water supplying pipe connected to the heater core 3. A blowing air temperature sensor 9 is also mounted near a floor blowing port 14 and the output therefrom is fed to the control circuit 8 along with the output from a potentiometer 7 for use in sensing the degree of opening of the door 4. A degree of opening of the control valve 11 is controlled in reference to both input signals to get blowing hot air corresponding to the degree of opening of the air mixing door. |
