To replace a chemical filter without removing a dust and dirt removing filter, for replacing the chemical filter required for the periodic replacement without entering a clean space, in an air cleaning unit.
This filter replacing device incorporates a fan 1 and a fan unit 3 of a motor 2 into a chamber 4; is provided with the chemical filter 5 and the dust and dirt removing filter 6 in a lower part; and has a fan unit rail 11 on both side surfaces of the chamber 4, and a chemical filter rail 12 on chemical filter both side surfaces. The filter replacing device is provided for pulling out the chemical filter 5, by allowing the chemical filter 5 to abut on a chemical filter receiving groove 14, by upwardly moving a support 15 having a fan unit receiving groove 13 abutting on the fan unit rail 11, and a chemical filter receiving groove 14 abutting on the chemical filter rail 12.
Tomoyasu Sakaguchi
Hiroki Naito