JPS63127029A - Cooker - Google Patents

Abstract

PURPOSE:To make the cooking chamber more spacious and improve the cooking performance and quick heating characteristics by dividing a a surface heater into a mid section and a peripheral section, and controlling the temperature of one of them at a predetermined temperature by means of a sensor, and, supplying the electricity to the other one while the former is exceeding the predetermined temperature. CONSTITUTION:Where the grill cooking in which scorched texture is to be made quickly on the food such as grilled fish, a mid heater 10a is supplied with electricity upon starting the cooking. Since the mid heater 10a is 1/2-1/3 of the top wall surface of the cooking chamber in size, the central part of the top wall 9 reaches a predetermined temperature in a short period of time. When such temperature is sensed by a sensor 16, the electricity is supplied to a peripheral heater 10b. As the temperature of the central top wall 9 is controlled at the predetermined temperature, the electricity is supplied to the peripheral heater 10b while the predetermined temperature is being exceeded. By the time when the cooking is over, the temperature of the peripheral wall reaches the predetermined temperature, and the top wall 9 of the cooking chamber has a uniform temperature distribution. Therefore, the food gets the scorched texture quickly by the mid heater 10a which attains a high temperature in a short period of time, allowing the food to retain its inherent jucy taste.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a heating cooker equipped with a temperature sensor that detects the wall surface temperature, and is applicable to heating objects in a heating chamber such as an electric opener or a microwave oven with a heater. This relates to a cooking device that heats food using heat from a heater.

Conventional technology FIG. 6 is a sectional view showing a conventional heating cooker.

In FIG. 6, the heating chamber 1 is provided with an upper heater 2 at the upper part and a lower heater 3 at the lower part, and the food placed on the saucer 4 is heated and cooked. Furthermore, a magnetron 6 is installed, and radio waves are irradiated into the heating chamber via a waveguide 7 to heat one food item 5 by radio waves.This is a so-called combined heating oven using a heater and radio waves.

FIG. 7 is a perspective view of a heater used in a conventional heating cooker.

Problems to be Solved by the Invention However, since the upper heater 2 and lower heater 3 of such a conventional heating cooker are exposed in the heating chamber 1, the effective space of the heating chamber is reduced by this amount. It becomes narrower,
In order to be able to store even large foods, the heating chamber needs to be made larger by the size that the heater occupies, and the outer size also becomes larger, requiring a large installation space, making the heating cooker difficult to use. was. Furthermore, if the heater was exposed in the heating chamber, even if food stains were scattered on the heating chamber wall, the heater would get in the way and be difficult to clean, making it inconvenient to use. In terms of cooking, the sheathed heater 2.3 shown in the figure has a pipe-shaped metal outer shell, so the minimum bending radius is limited, and the shape must be relatively simple. The surface temperature of the heater during heating reaches 600°C in 1 to 2 minutes.
The temperature rises to about 8000C, and although the heater itself has excellent rapid heating properties, the ambient temperature outside the sheathed heater portion is relatively low within each plane including the sheathed heater, making uniform heating difficult and causing uneven heating. As a result, it was necessary to maintain a large distance between the sheathed heater and the food, and to move the food away to a position where uneven heating would not occur.

In order to solve this problem, there has been a proposal for a configuration in which the heater is placed outside the heating chamber and installed in a planar configuration, but with this configuration, the heat from the planar heater is efficiently transferred to the heating chamber. Because heat is not transmitted, the heat efficiency is poor and cooking takes time.
It was only put into practical use in a very limited number of cases, such as cases with sufficient electrical capacity.

Even in this case, energy loss is large.

This was not desirable from an energy-saving perspective, and the surface temperature of the wall of the heating chamber in which the heater was installed was low, making it impractical for grilling such as grilled fish that requires quick searing.

The present invention aims to solve these conventional problems, and provides a heating cooker that has excellent thermal efficiency, is easy to use by making the heating chamber clear, has good heating performance, and has excellent heating speed. This is what we provide.

Means for Solving the Problems The heating cooker of the present invention has a planar heater arranged over almost the entire outer surface of the heating chamber wall. The temperature of one sheet heater is controlled to a predetermined temperature by a temperature sensor, and power is supplied to the other sheet heater while the temperature exceeds the predetermined temperature.

Furthermore, in order to increase thermal efficiency, a blackish non-metallic colored layer is formed on the inner surface of the heating chamber wall facing the planar heater, so as to provide a far-infrared ray effect and a self-cleaning effect.

Sakukawa The heating cooker of the present invention divides the planar heater into two parts, a central part and a peripheral part, so that each can be independently controlled.

By sensing the temperature of the wall surface of the heating chamber with the temperature sensor, cooking can be performed while controlling the temperature of the wall surface of the planar heater section on one side equipped with the temperature sensor. If the size of the wall surface of the heating chamber where the sheet heater is placed and the power of the heater are constant, the temperature of the wall surface of the heating chamber will only reach the saturation temperature at saturation, but if the sheet heater is
By dividing the wall and concentrating power on one side of the heater, the wall temperature can be raised even higher. Therefore, it is possible to control the heater according to the food being cooked.
/' Ru. For example, if you want to gently bake a cake, etc. so that the whole thing is surrounded by hot air, you should control the wall surface temperature low, and if you want to quickly brown the surface of the food, such as grilled fish, you should control it at a high temperature. This means that the heating that is appropriate for the food being cooked can be obtained.

In addition, since the temperature sensor is installed on the wall near the heater, there is a table control so that even if the heater malfunctions due to abnormal heat generation, the power supply to the heater will be stopped if the wall temperature exceeds a certain temperature. This will work together with the safety device to ensure the safety of the user.

Furthermore, if a non-metallic colored layer made of a black-colored non-metallic material is formed on the inner surface of the heating chamber wall, it will absorb heat at high temperatures.
The heat diffusion ability increases and the radiation efficiency increases, so that the heat on the heating chamber wall surface can be efficiently radiated to the food to be cooked.

Furthermore, since there is no need for an exposed heater inside the heating chamber, the effective volume inside the heating chamber is wide C1, and the usability can be improved, such as easy cleaning.

The inner surface of the heating chamber wall is covered with a black self-cleaner 77"-
According to the structure of the cleaning layer, if the wall temperature is freely controlled to a temperature that maximizes the self-purifying effect,
There is no need to clean the heating chamber wall surface, further improving usability.

Embodiment 1 A heating cooker according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a front sectional view showing the structure of the cooking device according to the present invention. Upper wall surface 9 constituting heating chamber 8 in FIG.
An upper heater 10 and a lower heater 12 are provided in close contact with the outer surface and the lower wall surface 11, respectively. The upper heater 10 is divided into a central heater 10a and a peripheral heater 10b. Furthermore, a magnetron 13 serving as an oscillator is provided, and the heating chamber 8 is irradiated with radio waves from an opening 15 via a waveguide 14 . 16 is the central heater 10a
A temperature sensor installed nearby detects the temperature of the upper wall of the heating chamber. Food 17, which is an object to be heated, is placed in the saucer. 18. IQ is a heat insulating material that shields the heat from the heater.

FIG. 2 is an exploded perspective view showing the structure of the upper heater of the cooking device according to the present invention, and FIG. 3 is an enlarged partial sectional view showing the structure of the heater of the cooking device.

In FIGS. 2 and 3, a heating element 21 is wound around a winding frame 20 made of a heat-resistant insulator such as mica.

The upper and lower surfaces of this winding frame 20 are also made of mica or the like.
Insulating plates 22 and 23 made of a thermal insulator are provided, and the heating element 2
Make a configuration where 1 is inserted. A metal holding plate 24 is provided on the upper surface of the insulating plate 22 and fixed to the heating chamber main body 26 with stepped screws 25. Heating chamber wall surface 2 facing heating element 21
7 is composed of a metal plate such as an iron plate, and its inner surface forms a non-metallic colored layer 2 which is colored in a blackish color using a non-metallic material such as heat-resistant paint or heat-resistant enamel and is made of a highly heat-resistant material. composition.

FIG. 4 is a diagram showing the change over time in the wall surface temperature of the heating chamber during heating of the cooking device according to the present invention.

Taking grilling such as grilled fish, which quickly browns the food, as an example, power is supplied to the central heater 10a at the start of heating. 3, the wall surface on which the central heater 10a is arranged reaches the predetermined temperature point P in a short time.In the case of grilled fish, the predetermined temperature is set to approximately 500°C, the temperature at which near-infrared rays and far-infrared rays are radiated. The temperature sensor 16 placed on the wall near the central heater 10a detects that the predetermined temperature has been reached and starts supplying power to the peripheral heater 10b.Then, while controlling the wall surface of the central heater 10a to a predetermined temperature, Power is supplied to the peripheral heater 10b during the time when the temperature exceeds the temperature.When the cooking is finished, the peripheral heater 10b wall surface reaches a predetermined temperature due to heat conduction from the central heater 10a, and the upper wall surface of the heating chamber 9 has almost uniform heat distribution.

Therefore, the central heater 10a, which has reached a high temperature in a short period of time, quickly burns the food and finishes cooking without losing the flavor of the food. Therefore, the cooking time is short, and the food can be cooked efficiently and skillfully.

FIG. 5 is a diagram showing a 10-vane configuration for controlling a heating cooker according to the present invention. Commands input from the menu key 30 on the operating spring /l/29 are decoded by the control section 31. Then, the control unit 31 starts supplying power to the heater 10, which is a heating means, via the driver 32. An object to be heated 17 is placed in the heating chamber a. The temperature of the upper wall surface 9 of the heating chamber is detected by the temperature sensor 16, and its signal is input to the control section 31 via the detection circuit 33. The control unit 31 is implemented by a microcomputer or the like.

With such a configuration, the control shown in FIG. 4 can be performed to perform efficient and stable cooking.

Effects of the Invention As described above, the heating cooker according to the present invention provides the following effects.

(1) The planar heater is divided into two parts, and power is supplied to one side of the heater at the start of heating, so that the temperature of the wall surface of the heating chamber can be rapidly raised, and food can be browned in a short time.

Instead, it is possible to cook without losing the umami inside, improving thermal efficiency, and improving cooking performance and speed. In addition, by changing the control temperature for controlling the heater, it is possible to provide a cooking device that can perform heating control according to the type of food and can perform a wide range of cooking.

(2) By placing a temperature sensor on the heating chamber wall near the sheet heater, it responds sensitively to the temperature of the heater, and even if the heater malfunctions and generates abnormal heat, the temperature sensor will not exceed a certain temperature. If the control unit is programmed to stop power supply in the event of a failure, it is possible to prevent electrical leakage and electric shock in the event of a failure, thereby ensuring safety.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a heating cooker according to an embodiment of the present invention, FIG. 2 is an exploded perspective view showing the configuration of the heater of the same heating cooker, and FIG. 3 is a partial sectional view showing the configuration of the heater section. , 4th
The figure is an explanatory diagram showing the control method of the heating cooker, Fig. 5 is a block diagram showing the same configuration, Fig. 6 is a sectional view of the conventional heating cooker, and Fig. 7 is a perspective view of the heater of the same heating cooker. It is a diagram. 9...Heating chamber upper wall surface, 10a...Central heater, 10b...Surrounding heater, 16...
Temperature sensor. 31...Control unit, 33...Detection circuit. Name of agent: Patent attorney Toshio Nakao and one other person β-
--Voice mouth adjustment 5j 10 (L-Ichiobe Heeg 10b--Kite surrounding area Heek Figure 1 16-Temperature Zenbu Figure 2

Claims (2)

[Claims] (1) A heating chamber in which an object to be heated is placed, a heating means for heating the object to be heated, a control section for automatically controlling the heating means, and a temperature sensor for sensing the temperature of the wall surface of the heating chamber. The heating means is a planar heater arranged on the outer surface of the heating chamber wall over almost the entire area, and the planar heater is divided into two parts so that each can be controlled independently, and one of the planar heaters is A heating cooker configured to control the temperature to a predetermined temperature and to supply power to the other sheet heater while the temperature exceeds the predetermined temperature. (2) The cooking device according to claim 1, wherein the heating chamber wall surface has a structure in which a black non-metal colored layer is formed on the inner surface of the metal wall surface facing the planar heater.