Abstract: Disclosed herein is a cleaner having an improved structure configured to improve the cleaning performance. The cleaner comprises a suction unit provided inside a body. The suction unit includes an impeller configured to suction air by rotating about a shaft, and a diffuser configured to guide air discharged from the impeller. The impeller includes a hub, and a blade disposed on the hub, and provided with a leading edge disposed in an upstream side in a direction in which air introduced into the suction unit flows, and a trailing edge disposed in a downstream side in the direction in which the air introduced into the suction unit flows. The leading edge of the blade forms an inclination of 60 degrees or more and 80 degrees or less with respect to an axial direction.

Abstract: Disclosed herein is a cleaner having an improved structure configured to improve the cleaning performance. The cleaner comprises a suction unit provided inside a body. The suction unit includes an impeller configured to suction air by rotating about a shaft, and a diffuser configured to guide air discharged from the impeller. The impeller includes a hub, and a blade disposed on the hub, and provided with a leading edge disposed in an upstream side in a direction in which air introduced into the suction unit flows, and a trailing edge disposed in a downstream side in the direction in which the air introduced into the suction unit flows. The leading edge of the blade forms an inclination of 60 degrees or more and 80 degrees or less with respect to an axial direction.

Abstract: A fan motor assembly capable of improving efficiency of a motor by minimizing flow loss, and a vacuum cleaner having the same includes a case, a motor installed inside the case to form a suction force, an impeller rotatably installed on a shaft of the motor, and a guide fan configured to guide air that is suctioned by the motor, wherein the guide fan includes a first guide unit configured to increase pressure of the suctioned air and a second guide unit provided at an upper side of the first guide unit to be in contact with the case.

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 is a cleaner having an improved structure configured to improve the cleaning performance. The cleaner comprises a suction unit provided inside a body. The suction unit includes an impeller configured to suction air by rotating about a shaft, and a diffuser configured to guide air discharged from the impeller. The impeller includes a hub, and a blade disposed on the hub, and provided with a leading edge disposed in an upstream side in a direction in which air introduced into the suction unit flows, and a trailing edge disposed in a downstream side in the direction in which the air introduced into the suction unit flows. The leading edge of the blade forms an inclination of 60 degrees or more and 80 degrees or less with respect to an axial direction.

Abstract: A fan motor assembly capable of improving efficiency of a motor by minimizing flow loss, and a vacuum cleaner having the same includes a case, a motor installed inside the case to form a suction force, an impeller rotatably installed on a shaft of the motor, and a guide fan configured to guide air that is suctioned by the motor, wherein the guide fan includes a first guide unit configured to increase pressure of the suctioned air and a second guide unit provided at an upper side of the first guide unit to be in contact with the case.

Abstract: A fan motor assembly capable of improving efficiency of a motor by minimizing flow loss, and a vacuum cleaner having the same includes a case, a motor installed inside the case to form a suction force, an impeller rotatably installed on a shaft of the motor, and a guide fan configured to guide air that is suctioned by the motor, wherein the guide fan includes a first guide unit configured to increase pressure of the suctioned air and a second guide unit provided at an upper side of the first guide unit to be in contact with the case.

Abstract: A vacuum cleaner having an improved structure capable of enhancing suction performance includes a suction unit provided in a main body, the suction unit including an impeller disposed to suck air by rotating about an axis thereof, and a diffuser disposed to guide air discharged from the impeller. The diffuser includes an inner casing, an outer casing disposed to be spaced apart from an outer circumference of the inner casing and to form a path through which the air discharged from the impeller flows, and a plurality of vanes disposed at the inner casing to guide the air discharged from the impeller to the path, and the plurality of vanes protrude toward the outer casing to cross at least a part of the path.

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 are a fan motor and a vacuum cleaner which include a blowing fan and a plurality of diffuser blades disposed at a radially outer side of the blowing fan and circumferentially spaced apart from each other. Outer end portions of the plurality of diffuser blades include a spoiler portion formed obliquely to an outward direction with respect to an extending direction of the diffuser blades, so that a flow separation of air flowing across an outer surface of the diffuser blade is reduced. Accordingly, the suction force of the fan motor increases.

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 vacuum cleaner having an improved structure capable of enhancing suction performance includes a suction unit provided in a main body, the suction unit including an impeller disposed to suck air by rotating about an axis thereof, and a diffuser disposed to guide air discharged from the impeller. The diffuser includes an inner casing, an outer casing disposed to be spaced apart from an outer circumference of the inner casing and to form a path through which the air discharged from the impeller flows, and a plurality of vanes disposed at the inner casing to guide the air discharged from the impeller to the path, and the plurality of vanes protrude toward the outer casing to cross at least a part of the path.

Abstract: A fan motor assembly capable of improving efficiency of a motor by minimizing flow loss, and a vacuum cleaner having the same includes a case, a motor installed inside the case to form a suction force, an impeller rotatably installed on a shaft of the motor, and a guide fan configured to guide air that is suctioned by the motor, wherein the guide fan includes a first guide unit configured to increase pressure of the suctioned air and a second guide unit provided at an upper side of the first guide unit to be in contact with the case.

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 wheel connection apparatus is disclosed. The wheel connection apparatus includes a first axis rotatably connected to a wheel, a second axis rotatably connected to a cleaner body, and a frame that supports the first axis and the second axis and prevents the first axis and the second axis from becoming separated from the cleaner body and the wheel, the first axis and the second axis being arranged at a predetermined distance from each other.