Abstract: A clothes dryer and a method for controlling its operation are disclosed, in which the clothes dryer includes a second motor being separately driven from a drum or a circulation fan to control a cooling fan for cooling a condenser. As for the second motor, a variable speed motor is used and amount of heating of a heater of the clothes dryer is variable. In the method for controlling an operation of a clothes dryer, the cooling fan is operated when a predetermined period of time passes after the cooling fan being stopped during an initial operation, or the cooling fan is operated at a regular speed when a temperature of air circulating reaches a predetermined degree after the cooling fan being operated at a low speed during the initial operation of the clothes dryer. Also, the speed of the cooling fan is varied according to amount of heating of the heater.

Abstract: A condenser of a condensing-type clothes dryer is disclosed, which includes a plurality of condensing ducts provided in a middle portion of a circulation duct, the condensing ducts condensing air being circulated there-through after being discharged from a drum; and a plurality of cooling fins provided to be in contact with an outer surface of the condensing ducts, wherein an interval or a pitch of the cooling fins is different partially according to flow rate of air blown from a cooling fan for a heat-exchange with air flowing through the condensing duct. At this time, the pitch or interval of the cooling fins is narrow at a portion where air blown from the cooling fan flows fast, and the pitch or internal of the cooling fins is wide at a portion where air blown from the cooling fan flows slowly.

Abstract: Method for controlling a washing and drying machine, for improving drying performance, and saving energy, the method having a drying cycle for supplying heated air into an inner tub to dry laundry in the inner tub, wherein the drying cycle includes a plurality of drying steps each having the steps of rotating a pulsator for a preset time period, and rotating the inner tub for a preset time period in regular and reverse directions, for enhancing flow of the laundry.

Abstract: Method for controlling a washing and drying machine, for improving a drying performance, and saving an energy, the method having a drying cycle for supplying heated air into an inner tub to dry laundry in the inner tub, wherein the drying cycle includes a plurality of drying steps each having the steps of rotating a pulsator for a preset time period, and rotating the inner tub for a preset time period in regular and reverse directions, for enhancing flow of the laundry.

Abstract: An axial flow fan with a BLDC motor for electronic appliances is disclosed. The axial flow fan of this invention is optimally designed in axial height of both the blades and the fan housing, the number of blades, diameter ratio of the inner diameter to the outer diameter of the blades, camber ratio, pitch angle and sweep angle of the blades. The blades have an axial height higher than that of the fan housing, with a leading surface of the blades being placed outside the surface of the fan housing at a position higher than the surface of the fan housing by a predetermined projection height, thus increasing an air volume of the fan. In addition, the number of the blades is eight, with a diameter ratio of the inner diameter to the outer diameter of the fan being 0.40˜0.45, thus reducing operational noise of the fan.

Abstract: Method for controlling a drying process of a washing and drying machine including a preheating step for tightly closing and heating an inner tub for preparing an environment favorable for vaporization of water by elevating a temperature of the inner tub within a short time period, and a drying step for supplying heated air to the inner tub, to make heat exchange between the heated air and laundry, for drying the laundry, whereby improving a drying performance and reducing occurrence of environmental problem.

Abstract: A pulsator type washing machine having a washing function and a drying function in one unit, includes a first tub, a second tub disposed in the first tub, and a structure operatively coupled with at least one of the first and second tubs to receive air from the second tub, dehumidify the air and recirculate the dehumidified air back into the second tub to dry laundry in the second tub during a drying operation of the washing machine.

Abstract: An axial flow fan, used for cooling the compressor and the condenser within the machine compartment of a refrigerator, is disclosed. This axial flow fan delivers an adequate volume of air to the machine compartment, and effectively reduces operational noise of the refrigerator. The axial flow fan has a hub mounted to the rotating shaft of a motor, with a plurality of blades regularly fixed around the hub, with the number of the blades being three and a diameter ratio of the inner diameter of the axial flow fan, equal to a hub diameter, to the outer diameter of the fan being set to 0.21˜0.25. In addition, the axial flow fan of this invention has a large sweep angle, a large pitch angle and a high camber ratio.

Abstract: The present invention relates to a novel quinolone compound having an excellent antibacterial activity. More specifically the present invention relates to a novel quinoline(naphthyridine)carboxylic acid derivative represented by the following formula (I), which has an 4-aminomethyl-3-oximepyrrolidine substituent on 7-position of the quinolone nucleus and shows a superior antibacterial activity in contrast to the known quinolone antibactrial agents having a weak activity against gram-positive bacterial strains and also has a broad antibacterial spectrum and a highly improved pharmacokinetic property ##STR1## wherein R, R.sub.1, R.sub.2, R.sub.3, R.sub.4 and Q are defined as described in the specification.

Abstract: The present invention relates to a novel quinolone compound having an excellent antibacterial activity. More specifically, the present invention relates to a novel quinoline(naphthyridine)carboxylic acid derivative represented by the following formula (I), which has an 4-aminomethyl-3-oximepyrrolidine substituent on 7-position of the quinolone nucleus and shows a superior antibacterial activity in contrast to the known quinolone antibactrial agents having a weak activity against gram-positive bacterial strains and also has a broad antibacterial spectrum and a highly improved pharmacokinetic property: ##STR1## wherein R, R.sub.1, R.sub.2, R.sub.3, R.sub.4 and Q are defined as described in the specification.