JPH03187180A - Cooking hot plate - Google Patents

Abstract

PURPOSE:To uniformly heat the surface metal plate of a cooking hot plate and to improve the temperature control responsiveness of cooking surface of the hot plate, by having a heating plate body held in the hot plate and then having a temperature sensor abutted upon the surface metal plate. CONSTITUTION:A heating plate body 1 has its upper and lower parts held between insulating layers 2, each made of mica or ceramic paper, and the heating plate body 1 and each of the insulating layers 2 are both brought into pressure contact with or welded to each other by a surface metal plate 3 for internally holding the heating plate body 1 and the insulating layers 2 between the surface metal plate 3 and a back metal plate 4 in association with each other. And the back metal plate 4 has a hole 5 bored in its center to abut a temperature sensor 6 upon the surface metal plate 3. Since a cooking hot plat thus holds the heating plate body 1 internally, it may have its excellent temperature distribution even with its thin wall while since the temperature sensor may directly detect a plate surface temperature to control the plate surface temperature, the cooking plate may be obtained with quick heat response at the time of putting a cooking thing therein and with a low temperature drop.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to cooking grates such as household electric hot plates.

BACKGROUND OF THE INVENTION Conventionally, cooking plates have generally been made of a die-cast aluminum case containing a sheathed heater, or a sheathed heater attached to an aluminum plate by lasing.

Problems to be Solved by the Invention In the structure using the sheathed heater described above, (1) uneven heating occurs in the pattern of the sheathed heater. To eliminate uneven heating, the aluminum die-cast or aluminum plate must be made thicker, which increases the overall thickness of the hot plate, making it expensive.

■ Due to the low specific heat of aluminum, when cooking food with a high heat capacity such as steak, the temperature drops significantly and the food cannot be cooked at the specified temperature, making it unpalatable.

Increasing the wall thickness of the plate could be considered as a means to solve this drawback, but this would be expensive.

Therefore, the objects of the present invention are as follows: 1. To obtain a cooking plate with a thin wall thickness and good temperature distribution.

■ To provide a cooking plate that causes less drop in plate temperature even when cooking food with a large heat capacity.

■ To provide a planar heating element with good heat distribution at low cost.

Means for Solving the Problems In order to achieve the above object 1, a planar heating element is installed between a plurality of metal plates via an insulating layer, and the plurality of metal plates are joined by pressure welding or welding.

In order to achieve the second objective, the central part of the plate has no planar heating element and insulating layer, and has a concave back surface, and a temperature sensor is brought into contact with the metal plate in this concave part.

In order to achieve objective 3, a conductive metal thin plate is processed into a lath mesh shape and a planar heating element is used.

Effect The cooking plate of the present invention has a planar heating element included therein due to the first means, so that it has good temperature distribution even with a thin wall thickness, and also because of the second means.

The temperature sensor can directly detect the temperature of the plate surface.

Furthermore, by the third means, the planar heating element can be manufactured at low cost.

EXAMPLE Hereinafter, an example of the present invention will be described based on the accompanying drawings.

In FIGS. 1 and 2, 1 is a sheet heating element in the form of a lath mesh, and 1-A is a terminal portion. The surface heating element 1 is covered with an insulating layer 2 made of mica or ceramic paper at the top and bottom!
It is. Reference numeral 3 denotes a metal plate on the front side that encloses the planar heating element 1 and the insulating layer 2 together with the metal plate 4 on the back side, both of which are pressed or welded together. The front metal plate 3 is made of aluminum alloy and coated with fluororesin, and the back metal plate 4 is made of iron-based metal. There is a hole 6 in the center of the metal plate 4 on the back side.
is opened, the temperature sensor 6 is connected to the metal plate 3 on the surface.
is in contact with.

FIG. 3 is an external view of a hot plate employing this plate, where 7 is a body containing electrical parts, etc., and 8 is a lid.

Next, the operation of the configuration of this embodiment will be explained.

In the configuration described above, when electricity is applied to the planar heating element 1, it generates heat and uniformly heats the metal plate 3.4. The metal plate 3 on the surface of the casing is made of aluminum alloy with good heat conductivity, and since the temperature sensor 6 is in direct contact with this, the temperature control response of the cooking surface is improved. Furthermore, since the metal plate 4 on the back surface is made of iron-based metal with a relatively large heat capacity, the temperature drop on the cooking surface is reduced when cooking food with a large heat capacity.

Effects of the Invention As is clear from the above description, since the cooking plate of the present invention includes a planar heating element, a cooking plate with good temperature distribution can be obtained even with a thin wall thickness. In addition, the temperature sensor is brought into contact with the surface plate of the cooking plate, where there is no planar heating element or insulating layer, on the back surface of the cooking plate at approximately the center, and the cooking surface temperature is directly detected and controlled, so the thermal response of the plate is controlled. To obtain a cooking plate that has good properties and reduces temperature drop when food is placed therein. Furthermore, since the heater uses a lath mesh planar heating element, the amount of material used is small and it can be manufactured at low cost.

[Brief explanation of drawings]

FIG. 1 is a side sectional view of a cooking plate showing an embodiment of the present invention, FIG. 2 is a plan view of the same, and FIG. 3 is an external view of an electric hot plate employing the same plate. 1... Planar heating element, 3, 4... Metal plate, 6... Temperature sensor

Claims (3)

[Claims] (1) A cooking hot plate in which a sheet heating element is provided between a plurality of metal plates via an insulating layer, and the metal plates are pressure-bonded or welded. (2) There is no planar heating element or insulating layer in the central part,
2. The cooking plate according to claim 1, wherein the central portion of the back surface has a concave shape, and the temperature sensor is brought into contact with the concave portion. (3) The cooking plate according to claim (1), which uses a planar heating element formed by processing a conductive metal plate into a lath mesh shape.