Blower
AssigneeKoki Holdings Co., Ltd.
InventorsTadakatsu Ejiri, Kenji Niwa, Ibuki Kanda
Life of this patent
Estimating the term…
Abstract
A blower with assembly performance that is improved by downsizing of a housing resulted from unitization of a blower fan and a motor is provided. In a blower including a housing configured to house the motor and the blower fan therein and to include an air intake port sucking the air flow thereinto and a tubular air exhaust port configured to exhaust out the air flow toward a front side direction, the motor and the blower fan as an assembly embedded into a motor case are housed in a main body section of a housing. A brushless DC motor is adopted as the motor, and a motor circuit board is mounted on a front side of the motor. A semiconductor switch element is mounted on the motor circuit board, and the motor is driven at 40,000 revolutions/second or more.
Claims12
A blower comprising:
- a housing including an air intake port configured to suck air flow thereinto and an air exhaust pipe including an air exhaust port forming a singular through hole configured to exhaust out the air flow;
- and
- an assembly housed inside the housing, wherein the assembly includes:
- a motor including a rotor, a stator, and a driving shaft rotating together with the rotor;
- a fan fixed to the driving shaft and configured to generate the air flow;
- a motor case configured to house the fan and at least a part of the motor;
- and
- a motor circuit board disposed outside the motor case and configured to control the motor,
- wherein, the air exhaust port is disposed on an axial line of the driving shaft,
- wherein the motor is disposed between the air exhaust port and the fan in an axial-line direction of the driving shaft,
- wherein the motor circuit board is disposed between the motor and the air exhaust port,
- wherein the fan is a centrifugal fan having multiple blades, a diameter of the centrifugal fan, centered on the axial line of the driving shaft, is smaller than a diameter of the motor circuit board, and a radial dimension of the fan axially overlaps with a radial dimension of the stator,
- wherein the motor case forms an air blowing passage where the air that is exhausted from the fan flows along an outer peripheral surface of the stator,
- wherein the motor circuit board extends in a direction intersecting the axial line, and a portion of the motor circuit board is positioned in a region on an axial extension of the air blowing passage in the axial-line direction and at a downstream side of the stator, and
- wherein a diameter of the singular through hole is smaller than a diameter of the motor circuit board.
A blower comprising:
- a housing including an air intake port configured to suck air flow thereinto and an air exhaust pipe including an air exhaust port forming a singular through hole configured to exhaust out the air flow;
- and
- an assembly housed inside the housing, wherein the assembly includes:
- a motor including a rotor, a stator, and a driving shaft rotating together with the rotor;
- a fan fixed to the driving shaft and configured to generate the air flow;
- a motor case configured to house the fan and at least a part of the motor;
- and
- a motor circuit board disposed outside the motor case and configured to control the motor,
- wherein, the air exhaust port is disposed on an axial line of the driving shaft,
- wherein the motor case includes an internal air intake port disposed on the axial line of the driving shaft,
- wherein the motor is disposed between the air exhaust port and the fan in an axial-line direction of the driving shaft,
- wherein the motor circuit board is disposed on the axial line of the driving shaft,
- wherein the fan is a centrifugal fan having multiple blades, and a radial dimension of the fan axially overlaps with a radial dimension of the stator,
- wherein the motor case forms an air blowing passage where the air that is exhausted from the fan flows along an outer peripheral surface of the stator,
- wherein the motor circuit board extends in a direction intersecting the axial line, and a portion of the motor circuit board is positioned in a region on an axial extension of the air blowing passage in the axial-line direction, and
- wherein a diameter of the singular through hole is smaller than a diameter of the motor circuit board.
Dependencies are inferred from the claim text.