| 摘要 |
<p>This is an improved structural design for a hair dryer. Its feature is that on the housing wall (1) near the blowing opening (10) rim of the hair dryer, make the exhaust holes (2) to blow out an air flow. They are in an opposite direction and inclining to the out blowing air flow. When a blowing opening (10) of a dryer is blocked, they produce an outflow function. They improve the phenomenon of overheating or burning out an electric heater in case a blowing opening of a dryer is blocked. One step ahead, an alternative design is to make limited pressure flaps (3) on the outer part of exhaust holes. When the pressure inside the exhaust holes becomes excessively pressured by a blocked or half-blocked blowing opening, the flaps (3) may be pushed open. When over-loaded, the highly pressured air flow may be released through the exhaust holes. One more step ahead, it may be designed to have an adjustable mixing flow air-window at the same time. By applying the siphoning effect, it may inhale the outer cool air and blow it into the back section of the air blow blades of a hair dryer enabling to adjust the heated air flow temperature by a mixing method. It is different from a traditional method of adjusting heat producing volume of an electric heating wire.</p> |
