Device for and method of informing replacement time of air filter
First Claim
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.
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Accused Products
Abstract
The invention relates to a device for and a method of informing replacement time of an air filter, more particularly, to a device for and a method of informing replacement time of an air filter, in which the accumulation amount of the dust accumulated in the air filter is calculated based on the factors such as a contamination degree of the air introduced into the air filter, air introduction time, and air introduction volume, and then when the accumulation amount of the total dust in the air filter exceeds a reference value, a driver is informed of the replacement time of the air filter, so that it is possible to replace the air filter at an optimum instance to thereby maintain the pleasant interior circumstance of a vehicle, to prevent the dissipation of the expense caused by the unnecessary early replacement of the air filter, and to prevent the interior air contamination of the vehicle due to the delay of the replacement of the air filter, and the like.
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Citations
17 Claims
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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:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of 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 method comprises the steps of:
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determining whether it is operated at an interior air mode or at an exterior air mode, when the vehicle is started and the air conditioning device is operated; determining whether the interior air mode is at an initial interior air mode or not after the operation of the blower, when the result of determination is that it is operated at the interior air mode, and determining whether the blower is operated at an on state or at an off state if the result of the determination is that it is operated at the exterior air mode; calculating a supply amount (n+1) of dust introduced into the air filter and an accumulation amount (n+1) of dust concentrated in the air filter by following Expressions, after dividing results of the determination into an initial interior air mode state and a non-initial interior air mode in the interior air mode, a blower-on state and a blower-off state in the exterior air mode;
dust supply amount (n+1)=contamination degree×
air introduction time×
air introduction volume,
dust accumulation amount (n+1)=dust supply amount (n+1)×
filter efficiency;calculating a total dust accumulation amount (n+1) written by the following Expression by the application of the calculated dust accumulation amount (n+1);
total dust accumulation amount (n+1)=total dust accumulation amount (n)+dust accumulation amount (n+1); andinforming replacement time of an air filter when the calculated total dust accumulation amount (n+1) exceeds a reference value. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification