Hot-air heater
AssigneeRinnai Corporation
InventorsYokihiko Shimonoma, Keichi Ito, Yoshinori Fujisawa, Yoshimune Yamada
Life of this patent
Estimating the term…
Abstract
Because the air trunk area of the air blowing passage on the downstream side of the air-blowing fan was kept almost constant in a conventional hot-air heater, an electric heater provided in this air blowing passage provided air trunk resistance by itself making it necessary to increase the rotation speed of the air blowing fan thereby resulting in the operating noise growing louder which, in turn, posed a problem. Therefore, an expansion 35 was formed along the air blowing passage 32 that passes from the intake opening 11b through the exhaust opening 12b. This expansion functions as a storage portion that contains the electric heater 3.
Claims6
A hot-air heater comprising:
- (a) an air-blowing passage leading from an inlet to an outlet;
- (b) an air-blowing fan and an electric heater, which are provided along said air-blowing passage, so that when said air-blowing fan is operated to suck air into said air-blowing passage through said inlet, said air is heated by said electric heater to provide hot air, which is blasted out of said outlet into a room,
- wherein an expansion is formed on said air-blowing passage as a storage portion to contain said electric heater.
Dependencies are inferred from the claim text.