Patent ID: 7686872
Filing Date: 2010-03-30
Classification: B01D,Y10S

Abstract:
1. A device for informing replacement time of an air filter in an air conditioning device for a vehicle, which includes a blower provided with an exterior/interior air switching door at the inside to selectively open and close interior/exterior air inlet openings formed at the inlet side according to interior/exterior air modes, and a blower for blowing the air introduced through the interior/exterior air inlet openings to a air conditioning case, and an air filter disposed at least one place of upstream and downstream of the blower, wherein the device further comprises: an air contamination informing means for providing a contamination degree of air introduced into the air filter before the air passes through the air filter; an air introduction time calculation means for calculating a time spent for the air to be introduced into the air filter; an air introduction volume calculation means for calculating a volume of the air introduced into the air filter; an indicating means for informing replacement time of the air filter; and a controller for calculating and integrating dust supply amount and dust accumulation amount of the air filter based on factors such as values provided from the air contamination informing means, the air introduction time calculation means, and the air introduction volume calculation means, and then informing the replacement time of the air filter by way of the indicating means when the total dust accumulation amount of the air filter exceeds a reference value.