Patent ID: 6935122

Claim:
An air feeding apparatus, comprising an air supplying chamber disposed in a main housing; an air pump disposed in the main housing for feeding compressed air into the air supplying chamber; a power supplier disposed in a control box; the power supplier having a switch for controlling on and off of power; the air supplying chamber having a plurality of cold producing plates therein; a switching circuit being connected to the cold producing plates for changing a working mode of same from a first cold producing one to a second heat producing one, in which positive and negative terminals of the cold producing plates are in reverse direction, a first pipe and a second pipe shorter than the first pipe being connected to an inlet of the air supplying chamber, a valve being connected to an outlet of the air pump, the valve being capable of being switched between a first position to connect the first pipe and a second position to connect the second pipe; the air supplying chamber having a conduit connected to an outlet thereof; the conduit sticking outside the housing for guiding air to outside, which has traveled through the air supplying chamber to have temperature changed by means of the cold producing plates; and a plurality of heat dissipating fins disposed in the housing for dissipating heat produced by the cold producing plates when the cold producing plates are working to produce cold.