Abstract: An air feeding apparatus includes an air supplying chamber disposed in a housing, and cold producing plates in the chamber, which are connected to a switching circuit controllable for changing a working mode of the plates from a cold producing one to a heat producing one. A conduit is connected to an outlet of the air supplying chamber, and sticks outside the housing. Air is forced to travel through the air supplying chamber by means of an air pump, and is guided to outside by means of the conduit; thus, the air traveling through the chamber can have temperature changed by the cold producing plates, and can be conveyed to desired locations or into other objects for use.

Abstract: A mattress assembly comprises a covering, a mattress, and a bed base. The covering includes a cloth covering with a zipper to allow easy opening/closing of the cloth covering. The mattress and the bed base are covered by the cloth covering. The mattress includes a plurality of vents communicated between the covering and the bed base. The bed base includes a plurality of grooves in an upper side thereof. When liquid permeates the covering, it passes through the vents and then accumulates in the grooves. The mattress assembly further includes an air supply device comprising a plurality of air supply tubes and a plurality of ventilating tubes extending in the grooves of the bed base. Air feeding from the air supply tubes flows through the grooves of the bed base via the ventilating tubes and then exit the vents of the mattress for circulation.