Electric heating – Heating devices – With heater-unit housing – casing – or support means
Reexamination Certificate
1999-12-29
2001-01-30
Walberg, Teresa (Department: 3742)
Electric heating
Heating devices
With heater-unit housing, casing, or support means
C219S535000, C392S503000
Reexamination Certificate
active
06180930
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a safe heater, especially to a heater with an enclosing envelope to enhance the safety thereof.
2. Description of the Prior Art
The advanced heater generally uses ceramic resistor material (PTC) and uses thermal radiation to transmit heat energy to ensure safety. The PTC heater comprises a flat main body with two surfaces (upper surface and lower surface), an anode and a cathode are formed on the two surfaces, respectively. The upper surface and lower surface are used as electrodes and function as heat emitting surfaces. However, the size of the flat main body is small such that heat guiding means such as heat-dissipating plates are required to guide the thermal energy. The heat-dissipating plates are generally fin-shaped metal plates for efficient heat exchange. Moreover, the heat-dissipating plates generally require supporting means such that the heat-dissipating plates abut vertically against the upper and lower surfaces of the flat PTC main body. The flat PTC main body is generally exposed to the external environment, and is probably exposed to moisture. The main body is flat shape with thin thickness, the flashover between the anode surface (upper surface) and the cathode surface (lower surface) of the main body is small. A spark may be generated when an inrush of current occurs. Moreover, flock and wasted paper beside the heater may cause a blaze due to the spark.
SUMMARY OF THE INVENTION
Therefore, it is the object of the present invention to provide a heater with an enclosing envelope to enhance the safety thereof.
To achieve the object, the present invention provides a heater with enclosing envelope to enhance safety, comprising a plate-shaped heating body made of a ceramic resistor, two conductive plates attached on the plate-shaped heating body, at least one heat-dissipating means absorbing the heat generated by the heating body and radiating the heat in radiation form. After the plate-shaped heating body is attached with the two conductive plates, an insulating case is used to house the plate-shaped heating body with the conductive plates. The resulting structure is inserted into a tubular enclosing envelope, and the tubular enclosing envelope is pressed to clamp the plate-shaped heating body. The heat-dissipating means is arranged outside the tubular enclosing envelope. By the enclosing envelope, the sparking is prevented and the heater is safer.
The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawing, in which:
REFERENCES:
patent: 4673801 (1987-06-01), Leary et al.
patent: 4797534 (1989-01-01), Prager et al.
patent: 4814584 (1989-03-01), Bohlender et al.
patent: 4822980 (1989-04-01), Carbone et al.
patent: 4931626 (1990-06-01), Shikama et al.
patent: 4954692 (1990-09-01), Shikama et al.
patent: 4963716 (1990-10-01), Van Den Elst et al.
patent: 5192853 (1993-03-01), Yeh
patent: 5198640 (1993-03-01), Yang
patent: 5270521 (1993-12-01), Shikama et al.
patent: 5377298 (1994-12-01), Yang
patent: 5471034 (1995-11-01), Kawate et al.
patent: 5889260 (1999-03-01), Golan et al.
Dahbour Fadi H.
Dougherty & Troxell
Walberg Teresa
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