PURPOSE: To permit air conditioning and ventilation in car interior with only one unit of blower without increasing the thermal load by constituting the outside air passage and the inside air passage which are equipped with a blower and an air conditioner so as to perform heat exchange in the upstream of the air conditioner by the use of a total heat exchanger.
CONSTITUTION: The outside air inhaled from an outisde air suction port 1a is fed into a total heat exchanger 3 by a blower 5 and blown-out to the evaporator side 6 after passing through the total heat exchanger 3. While, the car-interior air is pushed-out by the outside air blown-in and fed into the total heat exchanger 3 from an inside air passage 2a. The outside air 2a and the inside air 1a execute heat exchange in the total heat exchanger 3, and the outside air gets low temperature and low humidity. Therefore, the load for the evaporator 6 is reduced. With such a constitution, ventilation with only one unit of blower can be performed without increasing the thermal load accompanied with ventilation.
OKAMOTO KUNIO
NOGUCHI HIROKI
