An air filter apparatus, in particular for a heating and/or air conditioning installation for a motor vehicle, is of the kind comprising a housing through which an air stream can pass, with at least one filter member pivotally mounted within the housing for movement between a working position and retracted position. The filter member comprises a first end which is pivotally mounted about a first axis extending at right angles to the direction of flow of the air stream, and a second end disposed around a second pivot axis which is parallel to the first pivot axis. In the retracted position, a valve flap member overlies the filter member so as to prevent impurities carried by the filter member from becoming drawn into the air stream.
A device for the filtration of an airstream, in particular for a heating and/or air conditioning installation in a motor vehicle. The device provides, on one hand, a filtration that includes as much as possible of the entire airstream, while, on the other hand, for cooling and/or heating purposes, the device provides the entire air-conveying capacity without any air-output losses due to the filtration. The device includes a first outer air-channel containing fixed filter-wall parts of an activated carbon-filter arrangement, and a second inner air-channel containing second filter-wall parts of a particle-filter arrangement. The second filter-wall parts can be pivoted between an opening position which is essentially parallel to the first filter-wall parts and a closure position. Also included is a closure device at the exit of the outer air-channel, such that in the closure position, the entire airstream is conveyed at least through the filter-wall parts.
An air purifier includes a main body defining an air passage therein to allow sucked air to pass therethrough prior to being discharged, and a first filter installed in the main body to be switched between a closed state and an open state. The first filter removes contaminants from the sucked air in the closed state, and allows the sucked air to pass through the air passage in the open state. The air purifier may include a main body to suck and discharge air, with a bypass passage formed in the main body so that the bypass passage is opened or closed by a door, and a first filter installed in the main body. The sucked air passes through the first filter prior to being discharged when the door is closed, and passes through the bypass passage prior to being discharged when the door is opened.
