Patent ID: 7556090
Filing Date: 2009-07-07
Classification: B60H

Abstract:
1. An automatic control type vehicular air-conditioner for automatically controlling a temperature of air blown into a vehicle compartment and a flow rate of air blown into the vehicle compartment, comprising: a blower for blowing air toward an inside of the vehicle compartment, temperature adjusting means for adjusting the temperature of the air blown into the vehicle compartment, temperature controlling means for automatically controlling the temperature adjusting means so that the temperature of the air blown into the vehicle compartment becomes a target blown air temperature, judging means for judging if an air-conditioning heat load for maintaining a temperature in the vehicle compartment at a set temperature is within a minimum range of a predetermined amount or less, based on the target blown air temperature, blower controlling means for automatically controlling a flow rate of the blower in accordance with the target blown air temperature when the air-conditioning heat load is out of the minimum range, blower stopping means for automatically stopping the blower when judging that the air-conditioning heat load is within the minimum range, by using the judging means, wherein the blower controlling means maximizes the flow rate of the blower when the target blown air temperature is lower than a first predetermined temperature on a low temperature side; continuously varies the flow rate of the blower in accordance with a change of the target blown air temperature when the target blown air temperature is between the first predetermined temperature and a second predetermined temperature which is higher than the first predetermined temperature; and minimizes the flow rate of the blower when the target blown air temperature is between the second predetermined temperature and a third predetermined temperature which is higher than the second predetermined temperature, the judging means judges that the air-conditioning heat load is within the minimum range when the target blown air temperature is between the third predetermined temperature and a fourth predetermined temperature which is higher than the third predetermined temperature, so that said blower stopping means stops the blower based on the judgment, the blower controlling means minimizes the flow rate of the blower when the target blown air temperature is between the fourth predetermined temperature and a fifth predetermined temperature which is higher than the fourth predetermined temperature; continuously varies the flow rate of the blower in accordance with a change of the target blown air temperature when the target blown air temperature is between the fifth predetermined temperature and a sixth predetermined temperature which is higher than the fifth predetermined temperature; and maximizes the flow rate of the blower when the target blown air temperature is higher than the sixth predetermined temperature, and transition from the minimum flow rate state of the blower to a stop state thereof takes place stepwise.