| 摘要 |
PROBLEM TO BE SOLVED: To use the reaction of pressure inside a vehicle cabin in a sealed/closed state with the windows closed, circulate the air within the cabin and lead it to an inside air exhaust outlet of a total enthalpy heat exchanger, and maintain high heat exchange efficiency while reducing the weight and size of the vehicle air ventilation system. SOLUTION: Outside air is introduced to an outside air inlet 22a via an outside air introduction fan 22b. The outside air then flows into a passage of a total enthalpy heat exchanger 2 via an outside air introduction passage 22 and is supplied to the cabin through an outside air supply passage 23. At this time, the pressure within the cabin rises so that air inside the cabin is forced toward the cabin inner exhaust outlet 24a and flows through a separate passage of the total enthalpy heat exchanger 2 via an inside air introduction passage 24, so as to lower the pressure within the cabin. Here, total enthalpy heat exchange takes place with the exchange of sensible heat and latent heat of the outside air flowing through one of the passages and the inside air flowing through the other passage. Then, the outside air is sent to the cabin inner supply air opening 23a of the outside air supply passage 23 and supplied to the cabin. The inside air is send to the cabin outer discharge opening 25a of an inner air discharge passage 25 and discharged into the trunk. |
