A fan frame is provided to solve the problem that the metal plate of the conventional fan frame is easily squeezed and deformed. The fan frame includes a metal plate and a rim. The metal plate includes at least one notch located on an edge of the metal plate. The rim is formed on the edge of the metal plate by injection molding. The rim includes at least one gap located corresponding to the at least one notch of the metal plate. The at least one gap divides the rim into a plurality of side wall parts. A vertical extent of the at least one gap does not overlap with the metal plate. Fans including the fan frame are also disclosed.

A fan frame is provided to solve the problem that the metal plate of the conventional fan frame is easily squeezed and deformed. The fan frame includes a metal plate and a rim. The metal plate includes at least one notch located on an edge of the metal plate. The rim is formed on the edge of the metal plate by injection molding. The rim includes at least one gap located corresponding to the at least one notch of the metal plate. The at least one gap divides the rim into a plurality of side wall parts. A vertical extent of the at least one gap does not overlap with the metal plate. Fans including the fan frame are also disclosed.

Disclosed are a cross-flow air duct and an air outlet device. The cross-flow air duct includes a volute and a volute tongue. The volute includes a first body, a first side of the first body is an air inlet side, and a second side of the first body is an air outlet side. The volute tongue includes a second body, a first side of the second body is an air inlet side, and a second side of the second body is an air outlet side. An air inlet port is formed between the first sides, and an air outlet port is formed between the second sides. According to the cross-flow air duct, multiple groups of air outlet areas in different directions are formed, the air outlet width is enlarged as a whole, and the air supply range is increased.

Disclosed are a cross-flow air duct and an air outlet device. The cross-flow air duct includes a volute and a volute tongue. The volute includes a first body, a first side of the first body is an air inlet side, and a second side of the first body is an air outlet side. The volute tongue includes a second body, a first side of the second body is an air inlet side, and a second side of the second body is an air outlet side. An air inlet port is formed between the first sides, and an air outlet port is formed between the second sides. According to the cross-flow air duct, multiple groups of air outlet areas in different directions are formed, the air outlet width is enlarged as a whole, and the air supply range is increased.

A ventilating apparatus includes a panel, a motor, a circuit assembly, and the apparatus stops an operation of the motor and notify a user when the panel is opened independently of a specific driving condition. The circuit assembly includes a switch which is closed when the panel is coupled to a body, and opened when at least a part of the panel is separated from the body, a motor of which an operation is stopped when the switch is opened, and a microcomputer which is connected to the switch and outputs a notification signal in response to the opening of the switch.

Radial fan has tapered tongue geometry, impeller with impeller blades extending in radial direction about axis of rotation, and volute casing accommodating impeller rotatable about axis of rotation. Impeller blades each have a radially outward end edge, and end edges directly adjacent in circumferential direction that span an imaginary surface therebetween. Volute casing has outlet port for radially ejecting a fluid flow by impeller that is delimited in circumferential direction about axis of rotation by a tongue. At transition to a spiraled casing part of volute casing, the tongue has radially inward inner edge with two sections transitioning into one another via an extremum at a transition point. At least one section is inclined relative to axis of rotation and/or relative to radially outward end edges of impeller blades and intersects with at least one radially outward end edge and adjacent lateral surface up to its center in radial direction.

Radial fan has tapered tongue geometry, impeller with impeller blades extending in radial direction about axis of rotation, and volute casing accommodating impeller rotatable about axis of rotation. Impeller blades each have a radially outward end edge, and end edges directly adjacent in circumferential direction that span an imaginary surface therebetween. Volute casing has outlet port for radially ejecting a fluid flow by impeller that is delimited in circumferential direction about axis of rotation by a tongue. At transition to a spiraled casing part of volute casing, the tongue has radially inward inner edge with two sections transitioning into one another via an extremum at a transition point. At least one section is inclined relative to axis of rotation and/or relative to radially outward end edges of impeller blades and intersects with at least one radially outward end edge and adjacent lateral surface up to its center in radial direction.

A blower including a case; a fan; and a diffuser that is disposed downstream of the fan and guides air, discharged from the fan, toward discharge ports. The diffuser includes an outer wall; an inner wall spaced apart inwardly from the outer wall so that an air passage is formed therebetween; and a plurality of vanes that extends radially between the outer wall and the inner wall and divides the air passage into a plurality of unit passages. The outer wall and the inner wall are formed to have areas with different radial separation distances between the outer wall and the inner wall, such that in an area of the air passage of the diffuser in which air is discharged to a portion having a high flow resistance in the blower, the radial separation distance increases to widen the air passage, thereby compensating for asymmetry of the passage inside of the blower, allowing a uniform volume of air to reach an entire area of the discharge ports, and improving performance of the blower.

A blower including a case; a fan; and a diffuser that is disposed downstream of the fan and guides air, discharged from the fan, toward discharge ports. The diffuser includes an outer wall; an inner wall spaced apart inwardly from the outer wall so that an air passage is formed therebetween; and a plurality of vanes that extends radially between the outer wall and the inner wall and divides the air passage into a plurality of unit passages. The outer wall and the inner wall are formed to have areas with different radial separation distances between the outer wall and the inner wall, such that in an area of the air passage of the diffuser in which air is discharged to a portion having a high flow resistance in the blower, the radial separation distance increases to widen the air passage, thereby compensating for asymmetry of the passage inside of the blower, allowing a uniform volume of air to reach an entire area of the discharge ports, and improving performance of the blower.

A fan and a manufacturing method thereof are provided. The fan includes a hub having a circumference, a plurality of first blades, a mute ring and a plurality of second blades. Each of the plurality of first blades includes a first terminal disposed at the circumference of the hub and a second terminal opposite to the first terminal. The mute ring is disposed at the second terminal of each of the plurality of first blades. The plurality of second blades are disposed at the second terminal of each of the plurality of first blades and connected to the mute ring, wherein the plurality of second blades and the plurality of first blades are alternately arranged.