An improved filter element for use in an electrostatic precipitation air cleaning device, the filter element including rod electrodes arranged through a stack of alternating fluted plastic sheets and plate electrodes. Successive plate electrodes are arranged to make contact with an alternating one or the other of the rod electrodes. The plate and rod electrodes may be composed of high impedance materials such as paper and plastic, respectively. An arrangement for removably inserting a filter element into an air cleaning device is provided. The arrangement also removably provides electrical connectivity between the filter element and the air cleaning device. The filter element can thus be readily removed and re-installed by a user.
1. An air cleaning device comprising:
a housing, the housing having an opening;
an arm member, the arm member being hingedly attached to the housing proximate to the opening;
a tray member for receiving a filter element therein, the tray member including:
a perforated bottom wall; and
means for slidably engaging the arm member.
2. The air cleaning device of claim 1 , wherein the tray member includes electrical contacts for electrically contacting respective contacts on the filter element.
3. The air cleaning device of claim 2 , wherein the electrical contacts contact respective contacts in the air cleaning device when the tray member is in the air cleaning device.
4. The air cleaning device of claim 1 , wherein the filter element comprises:
a plurality of sheet elements, each sheet element including first and second walls separated from each other so that air may flow between the first and second walls;
a plurality of plate electrodes;
a first rod electrode; and
a second rod electrode,
wherein:
the plurality of sheet elements and plate electrodes are alternately arranged in a stack,
the first and second rod electrodes traverse the stack, and
successive plate electrodes alternately contact one of the first and second rod electrodes.
5. An air cleaning device comprising:
a housing, the housing having an opening;
an arm member, the arm member being hingedly attached to the housing proximate to the opening;
a tray member for receiving a filter element therein, the tray member including:
a perforated wall; and
means for slidably engaging the arm member.