Abstract: A fan for increasing the air flow through a register includes a housing having a closed top wall and side walls with air outlet openings therein. A bottom wall has air inlet opening for permitting air to enter from an air register into a fan chamber located within the housing. A centrifugal fan rotor is rotatably mounted in the fan chamber and directs air horizontally outwardly through the side vents in the register.

Abstract: An air conditioning apparatus comprising an indoor unit. The unit has a first indoor heat exchanger for cooling or heating indoor air and a second indoor heat exchanger for cooling or heating indoor air. A first indoor fan is located near the first indoor heat exchanger, for drawing the indoor air and supplying it through the first indoor heat exchanger to the zone of a room. A second indoor fan is located near the second indoor heat exchanger, for drawing the indoor air and supplying it through the second indoor heat exchanger to the zone of a room. The apparatus further comprises two temperature sensors for detecting the temperatures of the indoor heat exchangers, respectively. The higher or lower of the temperatures detected by the sensors is selected, in accordance with the cooling or heating mode in which the apparatus is operating. In accordance with the temperature selected, the air-supplying rates of the indoor fans are controlled.

Abstract: A temperature control method for a refrigerator which is capable of promptly restoring temperatures inside a freezing compartment and a refrigerating compartment by controlling a rotation speed of a fan of an operation control system of the refrigerator via a rotation speed-variable control unit to allow cooling air to flow into the freezing compartment and the refrigerating compartment in inverse proportion to each other in response to the temperatures inside the freezing compartment and the refrigerating compartment.