JPH0714373B2 - Graphite heating plate for cooking - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Purpose of the Invention> Industrial field of use The present invention relates to a graphite heating plate for cooking, which is suitable for fish, meat, vegetables and other foods, and is uniformly heated over the whole. The present invention relates to a graphite heating plate for cooking which gives a taste comparable to that of charcoal grilling.

2. Description of the Related Art Conventionally, when cooking meat such as beef, pork, and birds, vegetables, eggs, and other foods, frying pans, pans, gold nets, and other heating plates have been used. These heating plates mainly heat from the bottom surface to heat and cook the products on the surface, and are usually made of heat, metal such as aluminum, ceramics or the like. However, if you use a heating plate such as a frying pan, if you make a mistake in adjusting the temperature during heating, the contact surface of the food will burn quickly, the taste will deteriorate, and burnt residue or residue will adhere during use. There is a need. Also, with a heating plate made of metal, it is difficult to heat the surface uniformly,
The food contact surface is partially browned and the taste deteriorates,
Abnormal darkening is also called a cause of cancer and the like, and is not preferable in terms of health.

Furthermore, oil or the like is applied as a release agent, but if the amount of oil applied is large, the oil will soak into the food and the taste will be significantly deteriorated, causing smoke, and large smoke exhausting means in the kitchen and other places. You will need it. Oil splashes in the heated state and stains the surrounding area and at the same time stains clothes of people who cook.

A heating plate made of ceramic instead of metal has also been proposed, but it has a large weight, a low thermal conductivity and a low thermal efficiency.

In addition, since a carbon material is excellent in heat resistance and fire resistance among ceramic materials, a heating plate made of a carbon material has been proposed. This carbon material is called an ordinary carbon material, and the material proposed as an industrial product is directly applied to a cooking product. Therefore, the carbon heating plate is made of an industrial carbon material that is required to have strength and a dense structure, and the internal structure and the like have not been improved for cooking, so that the purpose for cooking cannot always be achieved.

On the other hand, a so-called gas or electric oven or the like is incorporated in a gas range as a smokeless cooker, or is commercially available as an independent cooker. However, these ovens usually have a heating source for electricity or gas placed in the upper part, for example, and are baked using radiant heat.Even though they are suitable for heating Western dishes such as bread, seafood or beef, When pork, bird, and other meats are baked, they are directly exposed to high-temperature flames and the like, and the flavor is lost due to radiant heat from the flames, which makes them unsuitable for cooking with heat.

On the other hand, for example, as a heating plate such as a frying pan made of metal, a heating plate on the surface thereof is lined with a fluororesin such as PTFE resin is commercially available. This heating plate effectively utilizes the excellent releasability of the fluororesin, and is superior to a heating plate made only of metal because it does not require the interposition of oil as a release agent.
However, since the fluorine-based resin covering the surface is inactive, almost no after-baking remains on the contact surface of the food, and the original flavor of the baked product is lost. Further, the fluorine-containing resin on the surface is extremely thin and has low strength, and it peels off even if a slight shock is given, making it difficult to handle. Furthermore, if the heating conditions are incorrect, the food may stick locally even if there is a fluororesin on the surface, and if used to a certain extent, the peelability of the fluororesin deteriorates and its characteristics cannot be fully exhibited. .

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The present invention aims to solve the above-mentioned drawbacks, and specifically differs from a heating plate made of metal, such as a conventional frying pan, and a carbon material excellent in heat resistance. Then, the carbon material is further fired to form graphitized graphite material, and the structure of the graphite material is made slightly porous, and the thermal properties of the graphite material and the pores formed in the graphite material are We propose a graphite heating plate that is most suitable for cooking by making effective use of.

Therefore, with the heating plate according to the present invention, when oil is applied as a release agent, part of the oil impregnates into the pores in the graphite heating plate, and this impregnated oil gradually leaches out during cooking. You can then soften the food. In addition, since the graphite material is more graphitized, it has a higher thermal conductivity than carbon or carbon materials, and since it has a considerable heat capacity, the heating surface is evenly heated over the entire surface, so that food contact Moderately wide knitting is uniformly formed over the entire surface, and excessive knitting due to local heating is not formed unlike the conventional example.

Furthermore, since the heating surface is uniformly heated over the entire surface, no smoke is generated during cooking, and even if oil is dropped during heating, excess oil will enter the pores, and therefore Does not scatter and does not pollute the surrounding environment or people who cook.

<Structure of the Invention> Means for Solving Problems and Its Actions That is, the heating plate according to the present invention is plate-shaped, and is made of a graphite material obtained by graphitizing a carbon material by firing. A large number of fine pores are formed in the bulk density of 1.45 to 1.
Characterized by being in the range of 6 g / cc.

Therefore, the structure and operation of these means will be specifically described with reference to the drawings.

First, FIG. 1 is a vertical cross-sectional view of a heating plate according to one embodiment of the present invention, and FIG. 2 is a vertical cross-sectional view of an example of the frying pan. Reference numeral 1 is a heating plate, 2 is a frying pan. Show.
As shown in FIGS. 1 and 2, the heating plate 1 and the frying pan 2 are both made of a plate-shaped graphite material. The heating plate 1 and the frying pan 2 made of these graphite materials are formed by forming carbon materials such as petroleum-based or coal-based coke or charcoal into a desired square bar or round bar shape as usual and then graphitizing them by firing. The graphite material is formed into an arbitrary shape, and at this time, the bulk specific gravity is set to be porous such as 1.45 to 1.6 g / cc. With this structure, countless fine pores 3 are formed in the graphite base material of the heating plate 1 and the frying pan 2.

As described above, in order to form the graphite material having the pores 3 and having the porous structure, the graphite material is fired as follows instead of being graphitized as usual.

That is, the graphite material is obtained by further calcining the carbon material such as coke which has been once calcined. In this graphitization, pitch or resin impregnation and firing are repeated to graphitize, but this is omitted or the degree of these is adjusted. In this way, the specific gravity can be adjusted appropriately and the structure can be made slightly porous. More specifically, a pitch or the like is added to a carbon material such as petroleum-based or coal-based coke or charcoal, and the mixture is kneaded and molded. This molded product is fired and graphitized by omitting the impregnation of pitch or the like or omitting a part thereof to obtain a graphite material having a bulk specific gravity of about 1.45 to 1.6 g / cc. A hot plate and a frying pan are obtained by processing this porous graphite material. By the way, the currently provided graphite material is required to have strength and solid structure as an industrial product, and therefore, once calcined, impregnation of pitch, resin, etc. and calcining are repeated, and the bulk specific gravity is at least 1.7 g / Although it can be increased to cc or more, if it is used as it is for a heating plate, graphitization is sufficient, but it is not porous and the effect of the present invention cannot be achieved.

Note that the lower limit of the specific gravity is 1.45 g / cc, because if it is less than this, the impregnated oil may pass and leak from the surface, and if it is 1.6 g / cc or more above and below, the structure is dense. This is because the above effect cannot be achieved.

When a heating plate or frying pan is constructed as described above, the base material is made entirely of graphite and has innumerable pores inside, so when heating gas, electricity, etc. from the bottom surface, its thermal energy is It is evenly transmitted to the whole material, and the heating surfaces of the heating plate and frying pan are uniformly heated and do not locally glow red. Further, since it is graphitized, heat rays containing far infrared rays are generated, and the heat rays cause food to be softly baked to obtain a mellow taste. Furthermore, some of the oil applied to the heated surface enters the pores,
Only a thin oil film is formed on the heated surface.

That is, as described above, the heating plate 1 and the frying pan 2 are made of a graphite material, and since the graphite material in which the graphite material is advancing is black, heat rays including far infrared rays are generated when heated. The heat rays heat the food. Therefore, unlike the case of heating by radiation as in the conventional gas oven or the like, the central portion of the food is evenly heated, resulting in a very mellow taste. Further, since the food is directly placed on the heating surface of the heating plate or the frying pan and baked, the surface of the food is evenly baked, so that the entire surface can be appropriately baked. Further, even if the oil is applied and the oil on the heating surface is consumed, since the oil is impregnated in the pores, the oil does not gradually seep out to the heating surface and cause oil shortage. In addition, even if the graphite material is provided as an industrial product, the specific gravity is as high as 1.7 g / cc or more, and since there are almost no pores, the oil impregnation effect described above cannot be achieved. Further, the graphite material itself has a releasability as in the case of a fluororesin such as PTFE, so that it is possible to largely prevent burn-in from this surface.

Further, the graphite material is excellent in heat conductivity and has a large heat capacity similarly to ceramics, and once heated, its surplus effect is large.

That is, for example, FIG. 4 and FIG. 5 are graphs showing the rate of temperature rise by the heating time at the time of heating by comparing the graphite heating plate and the heating plate of SUS type stainless steel, and by the cooling time at the time of cooling. It is a graph which shows a cooling rate. Also,
In Fig. 4, the heating rate at this time is the dimension of the heating plate.
Measure a temperature at the center and corners of a 300 × 250 mm rectangular flat plate, and the symbol A is a SUS stainless steel heating plate (thickness 3
mm) above all, A ₁ indicates the central part, A ₂ indicates the corner part, B is a graphite heating plate with a thickness of 20 mm, and among them, B ₁ is the central part, B ₂
Is a corner and C is a graphite heating plate with a thickness of 25 mm. Above all, C ₁
Is the center, C ₂ is the corner, D is the graphite heating plate having a thickness of 10 mm, among which D ₁ is the center and D ₂ is the corner. Further, in FIG. 5, as in FIG. 4, A is a SUS type stainless steel heating plate (thickness 3 mm), B is a 20 mm thick graphite heating plate, and C is a heating plate.
Is a 25 mm thick graphite heating plate, and D is a 10 mm thick graphite heating plate. As is clear from FIG. 4, the graphite made of graphite has a large heat capacity and thus requires a long heating time.
As is clear from the figure, the residual heat effect is also large.

Therefore, the food can be uniformly and appropriately heated throughout, and can be baked more softly from this aspect. In order to further increase the heat capacity and make the temperature distribution uniform, it is preferable to increase the thickness of the frying pan to some extent. Therefore, the thickness should be in the range of 1.0 cm to 5.0 cm, but preferably
Optimal is about 2.5 cm, and unless the thickness is 1.0 cm or more, sufficient heat capacity for cooking cannot be maintained, and when it is 5.0 cm or more, it becomes heavy for cooking and it is an expensive graphite material, so it is economical Not good for

In the above description, the heating plate and frying pan made of a plate-shaped material are mainly shown, but the heating plate according to the present invention is not limited to these examples, and includes all the ones used for cooking food. Further, like the frying pan shown by reference numeral 4 in FIG. 3, the heating surface may be made of a graphite material, and the back surface thereof may be lined with a metal plate 5 of iron or aluminum.

<Effects of the Invention> As described in detail above, since the heating plate according to the present invention is made of a graphite material, far infrared rays are generated from the heating surface of the surface during heating, and the food can be baked very gently.

Also, this graphite material has a specific gravity of 1.45 g / cc to 1.6 g / cc,
Since it is composed of a slightly porous material, a part of the applied oil is impregnated in its pores, and the oil gradually bleeds during cooking, so that the food can be baked without baking at all. In addition, since the graphite material has excellent thermal conductivity, the heating surface is heated uniformly, and the knitting marks are evenly formed over the entire contact surface of the food, and the local heating of the food and the sticking due to it can be eliminated, and smoke is not generated during cooking. It does not occur. Also,
When the oil is dropped during heating, a part of the oil is impregnated into the pores, so that the oil does not scatter and does not pollute the surrounding environment or the person who is cooking.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a heating plate according to an embodiment of the present invention, FIGS. 2 and 3 are vertical sectional views of respective frying pans according to the embodiment of the present invention, FIGS. 4 and 5 3 is a graph showing the heating rate and cooling rate of a graphite heating plate and a SUS stainless steel heating plate, respectively. Reference numeral 1 ... Heating plate 2, 4 ... Frying pan 3 ... Pore 5 ... Metal plate

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References Open 51-106268 (JP, U) Open 60-33930 (JP, U) Open 56-58922 (JP, U) Open 53- 32667 (JP, U) Actually opened 50-114458 (JP, U) Actually opened 47-4062 (JP, U)

Claims (1)

[Claims] 1. A carbon material which has been once fired is further fired and graphitized to form a graphite material having a thickness of 10 to 50 mm, and the bulk specific gravity is 1.45 to 1.6 g / cc inside the graphite material. A graphite heating plate for cooking, characterized in that a large number of fine pores are formed so as to fall within the range of.