Abstract: A refrigerator having a cool air circulation unit for directly supplying heat-exchanged cool air to a storage compartment is disclosed. The cool air circulation unit supplies and discharges the cool air, which has been heat-exchanged in an evaporator, to and from the storage compartment through a flow passage provided inside a partition.

Abstract: A refrigerator having a cool air circulation unit for directly supplying heat-exchanged cool air to a storage compartment is disclosed. The cool air circulation unit supplies and discharges the cool air, which has been heat-exchanged in an evaporator, to and from the storage compartment through a flow passage provided inside a partition.

Abstract: A cleaning device includes an inhalation unit to generate inhalation force to inhale air into a main body, the inhalation unit comprising: an impeller that is rotatable; an impeller cover having an inlet damper formed therein; and a return channel that is coupled to the impeller cover so that the impeller is capable of being accommodated in the return channel and that is directly coupled to the impeller so that air passing through the impeller is capable of being introduced into the return channel, the return channel comprising: an inner frame; and an outer frame at an outer side of the inner frame so as to be spaced apart from the inner frame.

Abstract: Disclosed herein are a centrifugal fan and a refrigerator. The centrifugal fan according to an aspect of the present disclosure has a structure in which a plurality of blades disposed along a circumferential direction are disposed in two lines in a radial direction of a hub, such that the noise of the fan is reduced and the flow rate of air is increased, and the efficiency of the fan is improved, and the centrifugal fan includes a middle guide member inducing an inflow in the center of the fan, such that the inflow to the fan is prevented from being concentrated in a lower part of the fan, and a total height of a discharge port is efficiently used. Therefore, the uniformity of a component of a discharging flow at the discharge port is improved and thus the noise of the fan is reduced.

Abstract: A refrigerator includes a mid-frame positioned on a front surface of the main body wall and a heater configured to heat the mid-frame and provided at the mid-frame. The mid-frame includes a front frame provided to cover at least a part of a front surface of the at least one inner box configured to form the main body wall, and an extension frame formed to extend rearward from the front frame and including an edge portion in which an end portion of the extension frame has a thickness greater than that of an adjacent extension frame.

Abstract: A cleaning device includes an inhalation unit to generate inhalation force to inhale air into a main body, the inhalation unit comprising: an impeller that is rotatable; an impeller cover having an inlet damper formed therein; and a return channel that is coupled to the impeller cover so that the impeller is capable of being accommodated in the return channel and that is directly coupled to the impeller so that air passing through the impeller is capable of being introduced into the return channel, the return channel comprising: an inner frame; and an outer frame at an outer side of the inner frame so as to be spaced apart from the inner frame.

Abstract: A cleaning device includes an improved structure in which cleaning performance can be improved. The cleaning device includes an inhalation unit to generate inhalation force to inhale air into a main body, wherein the inhalation unit includes: an impeller that is rotatable; an impeller cover having an inlet damper formed therein; and a return channel coupled to the impeller cover so that the impeller can be accommodated in the return channel, wherein the return channel includes: an inner frame; and an outer frame placed at an outer side of the inner frame so as to be spaced apart from the inner frame, and a plurality of wings are disposed between the inner frame and the outer frame.

Abstract: A refrigerator includes a mid-frame positioned on a front surface of the main body wall and a heater configured to heat the mid-frame and provided at the mid-frame. The mid-frame includes a front frame provided to cover at least a part of a front surface of the at least one inner box configured to form the main body wall, and an extension frame formed to extend rearward from the front frame and including an edge portion in which an end portion of the extension frame has a thickness greater than that of an adjacent extension frame.

Abstract: Disclosed herein are a centrifugal fan and a refrigerator. The centrifugal fan according to an aspect of the present disclosure has a structure in which a plurality of blades disposed along a circumferential direction are disposed in two lines in a radial direction of a hub, such that the noise of the fan is reduced and the flow rate of air is increased, and the efficiency of the fan is improved, and the centrifugal fan includes a middle guide member inducing an inflow in the center of the fan, such that the inflow to the fan is prevented from being concentrated in a lower part of the fan, and a total height of a discharge port is efficiently used. Therefore, the uniformity of a component of a discharging flow at the discharge port is improved and thus the noise of the fan is reduced.

Abstract: A cleaning device includes an improved structure in which cleaning performance can be improved. The cleaning device includes an inhalation unit to generate inhalation force to inhale air into a main body, wherein the inhalation unit includes: an impeller that is rotatable; an impeller cover having an inlet damper formed therein; and a return channel coupled to the impeller cover so that the impeller can be accommodated in the return channel, wherein the return channel includes: an inner frame; and an outer frame placed at an outer side of the inner frame so as to be spaced apart from the inner frame, and a plurality of wings are disposed between the inner frame and the outer frame.

Abstract: Disclosed is a dust collector of a vacuum cleaner. The dust collector comprises: a cyclone body forming a cyclone chamber and having a bottom wall and an air inlet, air being admitted into the cyclone chamber and rotating in the cyclone chamber; an outlet pipe extending upwardly from the bottom wall of the cyclone body; and a dust-bin body surrounding the cyclone body in such a manner that a dust collection space is formed between the dust-bin body and the cyclone body. The inner diameter of the cyclone body is increased as approaching a height near the top end of the outlet pipe from the bottom wall of the cyclone body.

Abstract: Disclosed is a dust collector of a vacuum cleaner. The dust collector comprises: a cyclone body forming a cyclone chamber and having a bottom wall and an air inlet, air being admitted into the cyclone chamber and rotating in the cyclone chamber; an outlet pipe extending upwardly from the bottom wall of the cyclone body; and a dust-bin body surrounding the cyclone body in such a manner that a dust collection space is formed between the dust-bin body and the cyclone body. The inner diameter of the cyclone body is increased as approaching a height near the top end of the outlet pipe from the bottom wall of the cyclone body.