Low noise air blower

A low-noise air blower for use as a source of pressurized air for hydro-therapy systems, air filtration systems or other appliances comprising:

• an outer casing having at least one air inlet and at least one air outlet, wherein said air inlet of said casing comprises a plurality of radial openings which lead to a central circular opening in said casing,
• a flow-through motor and fan unit located inside of said casing and adapted to pull air in through said air inlet and force air out through said air outlet, and
• a layer of noise and vibration dampening resilient foam located between said flow-through motor and fan unit and said casing, said layer of foam having respective air permeable porous areas to allow for the passage of air from said air inlet of said casing to said flow-through motor and fan unit and from said flow-through motor and fan unit to said air outlet in said casing,
• whereby said flow-through motor and fan unit is encapsulated and suspended within said casing by said layer of foam without any rigid connection between said casing and said flow-through motor and fan unit.

A low-noise air blower for use as a source of pressurized air for hydro-therapy systems, air filtration systems or other appliances comprising:

• an outer casing having at least one air inlet and at least one air outlet,
• a flow-through motor and fan unit located inside of said casing and adapted to pull air in through said air inlet and force air out through said air outlet, said flow-through motor and fan unit comprising an electric motor having an armature mounted on a drive shaft supported for rotation relative to a fixed field winding with an air gap between said armature and said field winding, a fan blade attached to said drive shaft for rotation therewith, and air directing means for directing the flow of air through said air gap in said motor, wherein said air directing means comprises a cylindrical fan housing having a circular air intake passage in one end and means for supporting said electric motor in the other end with said fan blade rotating in said fan housing, and a substantially cylindrical tube extending from said fan housing and surrounding said electric motor,
• a layer of noise and vibration dampening resilient foam located between said flow-through motor and fan unit and said casing, said layer of foam having respective air permeable porous areas to allow for the passage of air from said air inlet of said casing to said flow-through motor and fan unit and from said flow-through motor and fan unit to said air outlet in said casing,
• whereby said flow-through motor and fan unit is encapsulated and suspended within said casing by said layer of foam without any rigid connection between said casing and said flow-through motor and fan unit.

A low-noise air blower for use as a source of pressurized air for hydro-therapy systems, air filtration systems or other appliances comprising:

• an outer casing having at least one air inlet and at least one air outlet, wherein said casing includes a substantially cylindrical sidewall and said air outlet in said casing comprises a cylindrical pipe segment extending radially through said sidewall and having one end closed with the exception of at least one small opening in the upper half thereof to allow for the flow of air from an upper chamber of said casing while preventing water from entering said casing and having the other end open to accommodate the insertion of an elongate hose of a bubble massager or the like,
• a flow-through motor and fan unit located inside of said casing and adapted to pull air in through said air inlet and force air out through said air outlet, and
• a layer of noise and vibration dampening resilient foam located between said flow-through motor and fan unit and said casing, said layer of foam having respective air permeable porous areas to allow for the passage of air from said air inlet of said casing to said flow-through motor and fan unit and from said flow-through motor and fan unit to said air outlet in said casing,
• whereby said flow-through motor and fan unit is encapsulated and suspended within said casing by said layer of foam without any rigid connection between said casing and said flow-through motor and fan unit.

A low-noise air blower for use as a source of pressurized air for hydro-therapy systems, air filtration systems or other appliances comprising:

• an outer casing having at least one air inlet and at least one air outlet,
• a flow-through motor and fan unit located inside of said casing and adapted to pull air in through said air inlet and force air out through said air outlet, said flow-thru motor and fan unit comprises an electric motor having an armature mounted on a drive shaft supported for rotation relative to a fixed field winding with an air gap between said armature and said field winding, a fan blade attached to said drive shaft for rotation therewith, and air directing means for directing the flow of air through said air gap in said motor,
• an electric motor drive circuit including a half wave rectifier to reduce the voltage to said electric motor, and
• a layer of noise and vibration dampening resilient foam located between said casing, said layer of foam having respective air permeable porous areas to allow for the passage of air from said air inlet of said casing to said flow-through motor and fan unit and from said flow-through motor and fan unit to said air outlet in said casing,
• whereby said flow-through motor and fan unit is encapsulated and suspended within said casing by said layer of foam without any rigid connection between said casing and said flow-through motor and fan unit.