JP2529383Y2 - Plate heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION INDUSTRIAL APPLICATION FIELD The present invention relates to a plate heater used for an electric stove or the like.

2. Description of the Related Art Conventionally, a plate heater used for an electric stove or the like is, for example, as disclosed in Japanese Utility Model Laid-Open No. 1-158689, using a Ni brazing material for a heat generating portion of a sheathed heater on the back side of a plate made of austenitic stainless steel. It has a close contact structure.

The problem to be solved by the present invention In such a structure, the sheathed heater generates heat, and the heat is transmitted to the surface through the plate, so that the quick heat property is poor. Conversely, since the backside has a high temperature rise, it is necessary to insulate the backside using a heat insulating plate or the like when commercializing. As described above, wasteful heat dissipation is large, and thermal efficiency in actual use is deteriorated.

Means for Solving the Problems The present invention has been made to solve the above-mentioned drawbacks, in which a recess is provided on the surface of the plate, a sheath heater is placed in the recess, and the sheath heater is fixed and flatness is secured thereon. For this purpose, an undercoat by Ni spraying is applied, and a top coat of alumina iron oxide or the like is further sprayed thereon.

Action In this way, the quick heat property is improved, the rise in the temperature of the back surface is reduced, the useless heat dissipation is reduced, and the thermal efficiency on the practical use surface is improved. Ni spraying not only fixes the sheathed heater and improves the flatness of the entire surface, but also improves the heat resistance and corrosion resistance. Further, the spraying of ceramics or iron oxide covers the hardness of the coated surface, the improvement of the heat radiation effect, and the unsightly appearance due to the generation of a temper color at a high temperature peculiar to SUS (including Ni).

1 and 2, reference numeral 1 denotes a disk-shaped plate made of SUS material or the like, and a recess 3 having a substantially semicircular cross section is formed in a shape capable of accommodating a spiral sheathed heater 2 on the surface. Press molding. As shown in the enlarged view of FIG. 2, the sheathed heater 2 has a shape in which the upper surface is flat so that the entire surface of the plate 1 is flat, and the lower surface is in close contact with the concave portion 3 of the plate 1. A sheath heater 2 is set in the concave portion 3 of the plate 1 as shown in the figure. In this state, a flat press is performed to obtain a flat surface and to improve the close contact, so that the entire surface of the plate 1 is substantially flat. To do.

Next, the surface of the plate 1 is sprayed with an Ni material having good heat resistance and corrosion resistance as an undercoat 4. This is mainly for fixing the sheath heater 2, but also for adjusting the flatness.

Finally, a black-based iron oxide-based topcoat 5 that is hardly discolored by heat is sprayed on the undercoat 4.

Effect of the Invention As described above, according to the present invention, the surface of the plate 1 has a sheathed heater, so that the rapid heating property is very good. In addition, the plate surface that is in close contact with the lower part of the sheathed heater becomes like a heat insulating material, and the surface of the plate 1 Unnecessary heat radiation is reduced, and not only the thermal efficiency when commercialized is improved, but also the thermal safety is improved. The undercoat of the plate surface by Ni spraying not only fixes the sheathed heater and the plate, but also improves the heat resistance and corrosion resistance of the pipe material portion (since the Ni layer becomes thicker) of the sheathed heater. Since the flatness is made uniform, it is possible to improve the usability (the flat pot bottom can be easily placed, the cleanability can be improved). It also acts as a binder for the top coat.

In addition, the black iron oxide, which is the top coat, enhances the hardness of the surface, improving wear resistance, and because it is black and has many irregularities, it has a large surface area, good heat dissipation, and SUS material It can cover the unsightly appearance of the unique temper color.

Furthermore, there is no longer a factor that increases costs such as brazing (the cost of brazing work and the use of inexpensive materials such as SUS can be selected to avoid high temperatures ...). An ideal plate heater that is inexpensive, safe and highly reliable. That can be provided.

[Brief description of the drawings]

FIG. 1 is a sectional view of the plate heater according to the present invention, and FIG. 2 is an enlarged sectional view of a portion A in FIG. 1 is a plate, 2 is a sheath heater, 3 is a recess, 4 is an undercoat, and 5 is a top coat.

Claims (1)

(57) [Scope of request for utility model registration] 1. A recess (3) in a surface of a metal plate (1).
The sheathed heater (2) is placed in the recess (3), and the entire surface of the plate (1) and the sheathed heater (2) is subjected to an undercoat (4) by Ni thermal spraying. A plate heater characterized in that a top coat (5) such as ceramic or iron oxide is overlaid and sprayed.