Air warmer

An air blower, comprising:

• a motor assembly including a motor, a plenum and an impeller movably positioned inside the plenum workingly coupled to the motor, the plenum having an inlet and an outlet;
• an air filter through which air is sucked into the plenum when the motor assembly is in operation;
• an inlet muffler coupled to the plenum at its one end and the air filter at its other end, the inlet muffler including a first housing having an outer wall and a circumferential inner wall enclosing an inlet through passage, the inlet through passage establishing a fluid communication path between the inlet of the plenum and the air filter, a sound absorbent material fitted between the outer wall and the inner wall of the first housing;
• an outlet muffler including a second housing having an outer wall and an inner circumferential wall defining an outlet through passage, the outlet muffler positioned relative to the plenum with the outlet through passage in fluid communication with the outlet of the plenum, a sound absorbent material fitted between the outer wall and the inner wall of the second housing;
• wherein when the motor assembly is in operation, air is sucked into the inlet through passage through the air filter, passes to the plenum and outputs therefrom to the outlet through passage as a stream of air flow;
• and
• wherein sound resulting at least from air turbulence due to movement of the air in the plenum during operation of the motor assembly is reduced by the inlet and outlet mufflers,
• wherein the air blower further comprises a heater plenum having at least one heater element interposed between the plenum and the outlet muffler, the heater plenum routing the air output from the plenum to the outlet muffler, the heater plenum structurally configured to reduce the turbulence of the being routed air, the air in the heater plenum being heated by the at least one heater element so that heated air is output to the outlet muffler;
• and
• wherein the outlet muffler includes an outlet extension adapted to connect to one end of an air hose which other end is connectable to a convective blanket so that the convective blanket may be inflated by the heated air output from the outlet muffler.

An air blower, comprising:

• a motor assembly including a motor, a plenum and an impeller workingly coupled to the motor movably positioned inside the plenum, the plenum having an inlet and an outlet;
• an air filter;
• an inlet muffler including an inlet through passage in fluid communication with the inlet of the plenum and the air filter, an inlet low frequency noise attenuation section and an inlet high frequency attenuation section;
• an outlet muffler including an outlet through passage in fluid communication with the outlet of the plenum, an outlet low frequency noise attenuation section and an outlet high frequency attenuation section;
• wherein when the motor is activated to rotate the impeller in the plenum, air is sucked through the air filter into the inlet muffler and a stream of air flow is output from the outlet muffler;
• and
• wherein the inlet and outlet mufflers act to reduce noise resulting from operation of the air blower,
• wherein the air blower further comprises:
• a heater plenum interposed between the outlet of the plenum and the outlet muffler to provide a conduit for the air flow from the plenum to the outlet muffler, at least one heater positioned inside the heater plenum to heat the air flowing through the heater plenum so that heated air is output to the outlet muffler, the heater plenum configured to have a structure that reduces the turbulence of the air flow passing therethrough.