JP3249731B2 - Cooking device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooking device such as a hot plate.

[0002]

2. Description of the Related Art Aluminum or iron is generally used as a material of a cooking plate in a conventional heating cooker such as a hot plate. Recently, as disclosed in Japanese Patent Application Laid-Open No. 2-84910, carbon is used instead of these materials. The former, which is made of aluminum or iron, has poor heat uniformity, so that it is necessary to increase the weight.

[0003] Therefore, while becoming very heavy,
The temperature of the outer periphery of the cooking plate increased, and there was a risk of burns. Further, in the latter case made of carbon, since the heat conductivity is good, the outer peripheral portion of the heating cooker other than the cooking plate may become hot in some cases, causing a burn.

On the other hand, as a heating means, there is a heater in which a sheathed heater is installed below a cooking plate or a heater which is embedded in a cooking plate. In addition, a planar heating element has been proposed in which a conductive paste is printed on a heat-resistant glass substrate and baked to form a heating film for the purpose of equalizing the temperature of the entire cooking surface, and the cooking plate is directly heated in a planar shape. .

[0005]

As the insulating base material of the prior art sheet heating element, a ceramic base material such as crystallized glass having excellent heat resistance, thermal shock resistance, insulating properties and mechanical strength is used. However, the cooking properties were poor, such as poor heat conductivity and difficulty in browning. In consideration of this, a cooking plate in which a carbon plate having high thermal conductivity is laminated has been developed. However, for various types of cooking, it is necessary to further improve the thermal efficiency or the thermal responsiveness and the temperature control function.

[0006]

In order to solve the above-mentioned problems, the heating cooker according to the first aspect of the present invention has a back surface made of Ag or the like.
Printed or coated with a film heating element of low thermal conductivity
Comprising a heating plate made of an insulating substrate such as ceramic, and a high thermal conductivity of the carbon plate provided on the upper surface of the heat generating plate having, on the carbon plate
Increase the area of the heating plate and
So that the carbon plate can be moved, and
The area of the film heating elements are characterized and this <br/> made smaller than the heating plate.

[0007]

[0008]

[0009]

[0010]

Therefore, according to this configuration, the area where the film heating element portion of the heating plate and the carbon plate overlap can be changed by moving the carbon plate, thereby changing the temperature characteristics of the cooking surface of the carbon plate. As a result, since regions having different temperatures can be formed on the cooking surface of the carbon plate, foods that need to be cooked at a high temperature and foods that do not need to be cooked at the same time can be cooked at the same time, and an extremely convenient heating cooker can be provided. Things.

[0012]

[0013]

According to a second aspect of the present invention, there is provided a cooking device wherein
a heating plate made of an insulating base material such as ceramic having low thermal conductivity printed or coated with a film heating element of a g type or the like, and a high thermal conductivity carbon plate provided on an upper surface of the heating plate, the heating plate comprising: An auxiliary plate having a different thermal conductivity from the heat generating plate can be interposed between the heat generating plate and the carbon plate. According to this configuration, the temperature characteristics of the cooking surface of the carbon plate can be changed. Therefore, according to the present invention, it is possible to provide excellent heating cooking that allows more detailed cooking.

[0015]

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a side sectional view showing an embodiment of a heating cooker according to the present invention. In FIG. 1, 1 is a main body of a heating cooker comprising a box having a top plate 2 opened,
A power supply controller 4 is provided on the inner surface of the operation panel 3 on the front. Reference numeral 5 denotes a pedestal made of a heat insulating material provided on the bottom surface of the main body 1.
The heating plate 6 inserted into the main body 1 is placed.

The heat generating plate 6 has a thermal conductivity of 0.00.
39 cal / cm.sec..degree. C., an insulator such as crystallized glass and a base material made of a ceramic material with low thermal conductivity. The film resistor 7 of Ag or the like is printed or coated on the back surface by pattern printing or coating. I have. Numeral 8 is a carbon plate placed on the inner bottom surface of the heat generating plate 6, and has a heat conductivity of 0.28 ca.
l / cm · sec · ° C. 9 is the heating plate 6
It is a lid that opens and closes. Reference numeral 10 denotes a temperature sensor disposed on the upper surface of the central portion of the pedestal 5. The temperature sensor contacts the film heating element 7 to detect the temperature of the heating element 7.

A heating cooker according to the present invention has a basic configuration based on the configuration shown in FIG. 1, and another embodiment will be described below. In FIG. 2, the heating plate 6 is made of a simple plate, while the carbon plate 8 is formed in a pot shape. In FIG. 3, the surface of the heat generating plate 6 of FIG. 1 is formed as an uneven surface 6 'and the rear surface of the carbon plate 8 is formed with an uneven surface 8' which can be fitted into the uneven surface of the heat generating plate 6 in close contact. For example, the height and width of these two irregularities are 5 mm.
When the pitch is set to 10 mm, the joint area between the two is twice as large as that in the case of a flat surface, and the heat conduction characteristic of the carbon plate 8 to the cooking surface is improved about twice.

In the embodiment shown in FIG. 4, both the heating plate and the carbon plate 8 are formed in a pot-like shape, and the area of the heating plate 6 is made larger than that of the carbon plate 8 so that the heating plate 6 The carbon plate 8 is configured to be able to move back and forth. Further, the area of the film heating element 7 is made smaller than the area of the back surface of the heating plate 6 and is biased to one side of the back surface of the heating plate 6.

Therefore, in this embodiment, the entire area of the film heating element 7 becomes an effective heating surface for the carbon plate 8 as shown by the symbol S1 in the state of the solid line in the figure, and is shown by the symbol S2 in the state of the dashed line. Thus, only a part of the film heating element 7 becomes the effective heating surface. FIG. 5 shows a projection 61 provided on the back surface of the carbon plate 8 and a depression 61 fitted on the projection 81 on the surface of the heat generating plate 6.
Is provided.

In this example, the projections and depressions may be provided on either the heat generating plate or the carbon plate. By providing projections and depressions on both sides as described above, FIG.
If the carbon plate 8 is placed on the heat generating plate such that the projections fit into the depressions as in the above, the two can be used in a state where they are in close contact with each other, and the heat of the heat generating plate 6 is efficiently transmitted to the carbon plate 8. it can.

As shown in FIG. 6, if the carbon plate 8 is placed on the heat generating plate 6 so that the projections do not fit into the depressions, a gap h is formed between the two, and the heat of the heat generating plate 6 is Can be suppressed.

FIG. 7 shows a copper plate having a heat conductivity of 0.94 cal / cm.sec..degree. C. between the heat generating plate 6 and the carbon plate 8, which has a different heat conductivity from those plates. cm ・ sec ・ ℃ iron plate or 0.53 cal
Auxiliary plate 11 of aluminum / cm · sec · ° C
Is interposed. With this configuration, a thermal conductivity as shown in FIG. 8 can be expected.

In the embodiment shown in FIG.
Is made smaller than the area of the carbon plate 8, and a film heating element 7 that shows electric power to increase the W density of the heating plate is printed or coated on the back surface of the heating plate. For example, as shown in FIG.
When the power of (E) is applied and the power of 1300 W is applied to the 270 mm × 270 mm heating plate (F), the W density of the heating plate 6 is improved by about 20%, and the rise temperature characteristic of the heating plate is shown in FIG. Get faster as shown.

In the present embodiment, the heating plate 6 is made as small as possible, and the carbon plate 8, which is a direct cooking plate, is made larger than the heating plate to secure a necessary cooking area and improve the speed of the rising temperature. . In FIG. 11, a part of the carbon plate 8 is extended from a peripheral edge thereof to form an extended portion 82, and the temperature sensor 10 is brought into contact with the extended portion 82.

With this configuration, the temperature sensor detects the temperature of the heat generating plate by utilizing the high thermal conductivity of the carbon plate 8 while maintaining electrical and thermal safety at a location away from the heat generating plate.

In the configuration shown in FIGS. 12 and 13, the central portion of the film heating element 7 is deleted as shown in the figure, and the temperature sensor 10 is arranged and brought into contact with this portion 71. When the central portion of the film heating element 7 is thus deleted,
Naturally, there is no heat generation at the central portion, but the high thermal conductivity of the carbon plate 8 makes the temperature distribution on the surface of the carbon plate 8 uniform.

FIG. 14 shows an example in which the surface of the carbon plate 8 is made uneven or corrugated. With such a configuration, the heat radiation area of the carbon plate 8 is increased to increase the heat radiation efficiency, and the cooking property is improved. For example, in the case where irregularities of an equilateral triangle having an angle of 60 ° are provided, a radiation area twice as large as that in a planar state can be obtained.

In the configuration shown in FIG. 15, a large number of depressions 62 are provided in a grid pattern on the surface of the heat generating plate 6, and the carbon material 12 is filled in each of the concaves so as to be flush with the heat generating plate. Things. With such a configuration, the food placed on the heat generating plate 6 can be provided with a net-like scorch.

The structure shown in FIG.
A surface having a relatively large area is provided with a step to form a carbon plate fitting portion 63, and a carbon plate 8 is fitted to the carbon plate fitting portion so as to be flush with the heat generating plate. With this configuration, high-temperature cooking can be performed on the carbon plate, and low-temperature cooking can be performed on the heating plate.

[0031]

As is evident from the foregoing description, according to the inventions of claim 1, the film heating body portion of the heating plate and the carbon plate
By moving the carbon plate
The temperature characteristics of the cooking surface on the carbon plate.
Sex can be changed. As a result, the carbon
The formation of regions with different temperatures on the cooking surface of the plate
Foods that need to be cooked at high temperatures and those that do not
It is possible to cook at the same time, and it is possible to provide an extremely convenient heating cooker.

[0032]

[0033]

[0034]

[0035]

The cooking device according to the second aspect of the present invention,
a heating plate made of an insulating base material such as ceramic having low thermal conductivity printed or coated with a film heating element of a g type or the like, and a high thermal conductivity carbon plate provided on an upper surface of the heating plate, the heating plate comprising: An auxiliary plate having a different heat conductivity from the heat generating plate can be interposed between the carbon plate and the heat generating plate.
According to this configuration, it is possible to change the temperature characteristic of the cooking surface of the carbon plate and to provide an excellent effect of providing a heating cooker capable of performing finer cooking.

[0037]

[Brief description of the drawings]

FIG. 1 is a side sectional view schematically showing a basic configuration of a heating cooker according to the present invention.

FIG. 2 is a sectional view showing an embodiment of a heating plate and a carbon plate in the heating cooker of the present invention.

FIG. 3 is a sectional view showing another embodiment of the heating plate and the carbon plate.

FIG. 4 is a sectional view showing another embodiment of the heating plate and the carbon plate.

FIG. 5 is a sectional view showing another embodiment of the heating plate and the carbon plate.

FIG. 6 is a cross-sectional view showing another embodiment of the heating plate and the carbon plate.

FIG. 7 is a sectional view showing another embodiment of the heating plate and the carbon plate.

FIG. 8 is a diagram showing a relationship between thermal conductivity when an auxiliary plate of a different material is interposed between a heating plate and a carbon plate in the embodiment of FIG. 7;

FIG. 9 is a sectional view showing another embodiment of the heating plate and the carbon plate.

FIG. 10 is a diagram showing a relationship between rising temperatures in the embodiment of FIG. 10 in a case where the area of a heat generating plate is changed with the same power.

FIG. 11 is a sectional view showing still another embodiment of the heating plate and the carbon plate.

FIG. 12 is a sectional view showing another embodiment of the heating plate and the carbon plate.

FIG. 13 is a rear view of the heat generating plate in the embodiment of FIG.

FIG. 14 is a sectional view showing another embodiment of the heating plate and the carbon plate.

FIG. 15 is a sectional view showing still another embodiment of the heating plate and the carbon plate.

FIG. 16 is a sectional view showing another embodiment of the heating plate and the carbon plate.

[Explanation of symbols]

 Reference Signs List 6 heat generating plate 6 'uneven surface 7 film heating element 8 carbon plate 8' uneven surface 10 temperature sensor 11 auxiliary plate 12 carbon material 61 depression 62 depression 63 carbon plate fitting portion 81 protrusion 82 extension portion

──────────────────────────────────────────────────続 き Continued from the front page (56) References JP-A-6-327568 (JP, A) JP-A-7-303569 (JP, A) JP-A-6-68385 (JP, U) JP-A-54 33264 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47J 37/06 A47J 36/02 H05B 3/26

Claims (2)

(57) [Claims] 1. A heating device comprising: a heating plate made of an insulating base material having a low thermal conductivity on which a film heating element is printed or coated on a back surface; and a high thermal conductivity carbon plate provided on an upper surface of the heating plate. A cooker,
The heating is characterized in that the heating plate has a larger area with respect to the carbon plate so that the carbon plate can be moved on the heating plate, and the area of the film heating element is smaller than the heating plate. Cooking device. 2. A heating apparatus comprising: a heating plate made of an insulating base material having a low thermal conductivity on which a film heating element is printed or coated on a back surface; and a high thermal conductivity carbon plate provided on an upper surface of the heating plate. A cooker,
A heating cooker characterized in that an auxiliary plate having a different thermal conductivity from the heat generating plate can be interposed between the heat generating plate and the carbon plate.