Hot air blower with ceramic heating element
a heating element and hot air blower technology, applied in the field of home appliances, can solve the problems of large space occupation, long resistance wires, and limited potential of hot air blowers in this respect, and achieve the effect of improving heating uniformity and reducing nois
Inactive Publication Date: 2007-02-15
BEAUTI GEAR INT
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- Application Information
AI Technical Summary
Benefits of technology
"The present invention provides an air heater with improved heating uniformity and reduced noise relative to current electric hot air blowers. It incorporates voltage reduction devices with a minimal size and simple assembly. The air heater has a superior airflow capability and produces heat by far infrared waves. It also has an efficient drying system that saves energy without compromising performance. The heating element includes a ceramic base and a conductive heating film. The electric hot air blower includes a housing, a fan, and an electric heating element located inside the housing that aligns with the air flow path for heating air flow."
Problems solved by technology
Although some winding patterns do have some effect in the reduction of noise, their potential in this respect is very limited.
Existing electric hot air blowers have the following disadvantages: long resistance wires, large space occupation, complex bracket structure, high air resistance and noise.
Because the wires must be wound around a bracket, the winding of resistance wires can easily be made uneven, resulting in local over-heating, causing oxidation and breakage of resistance wires and shortening the service life of those electric hot air blowers.
Another significant disadvantage is the fact that heater coils naturally fatigue, may break, and get “spit” out of a dryer, causing possible personal injury.
Another cause of “spitting” is the fact that most heaters are hand wound, and a loose or poorly assembled coil may touch an adjacent coil, thereby causing a local drop in resistance, creating a hot spot resulting in near instant coil breakage and “spitting”.
In addition, resistance wires emit light, resulting in a low efficiency in the conversion from electricity to heat and a consequent waste of energy.
Current electric heaters having ceramic radiators are also inefficient, as electric heaters made up of nickel-chromium resistance wires heat the far infrared ceramic radiators indirectly, resulting in a low emission efficiency.
Coil transformers for dropping voltage suffer from the disadvantages of higher costs and large size.
Although this method is economical, the manufacturing process requires multiple stages and the resulting voltage dropping device is comparatively large.
Method used
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[0030] Referring to the drawings and, in particular, to FIGS. 3 and 4, there is provided an embodiment of an electric hot air blower, i.e., a hair dryer, of the present invention generally represented by reference numeral 300. Hair blower 300 utilizes a newly developed heating element, including conductive film or thin layer deposited on and preferably attached to a ceramic base, as an air heater.
[0031] Hair blower 300 includes a shell 305 with an air inlet 310 and an air outlet 315, a fan 320 operatively connected to a driving motor 325 assembled inside shell 305. Also mounted or assembled inside shell 305 is an electric heating element 330 for heating airflow and a power control assembly including a secondary / auxiliary heater and / or voltage dropping resistor 335. A bracket 340 holds heating element 330 and voltage dropping resistor 335 in position along an air flow path of hair blower 300. In one embodiment, resistor 335 acts as a dropping resistor, and may also act as a secondar...
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There is provided a heating element for an electric air heater including an electric power source, a ceramic base, and a conductive heating film substantially uniformly deposited on at least a portion of a surface of the base and electrically connected to the power source. There is also provided a method for manufacturing the heating element. There is further provided an electric hot air blower including a housing having an air inlet and an air outlet, a fan operatively connected to an electric motor, and an electric heating element located inside the housing that includes a ceramic base and a conductive film substantially uniformly deposited on a surface of the base and electrically connected to a power source. The electric heating element is located along an air flow path of the blower for heating air flow.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS [0001] The present application is claiming priority of Chinese Patent Application No. 200520015978.1, filed on Apr. 18, 2005, the content of which is herein incorporated by reference. BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention relates to home appliances involving electric heating, and more particularly, to hair blowers and electric air heaters having heating elements. [0004] 2. Description of the Related Art [0005] Commonly used electric hot air blowers, such as electric hair dryers or air heaters for home heating in winter, generally employ nickel-chromium alloy wires wound around a mica bracket as a heater. FIG. 1 illustrates an in inner structure of an existing electric hot air blower 100, where the electric heater is made of wound nickel-chromium alloy wires. Blower 100 includes a housing 105, an air inlet 110, an air outlet 115, a driving motor 120, a fan 125, and resistance heating wires 130...
Claims
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IPC IPC(8): A45D20/12A45D20/00
CPCH05B3/265A45D20/38
InventorLO, HOU ONLO, KAM
OwnerBEAUTI GEAR INT