JPH0712355A - Gas cooker - Google Patents

Abstract

PURPOSE:To remove oil content, odor, smoke in the case of circulating heat and to cook tasty food by setting an indoor temperature and oxygen concentration in a cooker housing to specific values, providing a heat circulating passage from heating means again to the means through an interior of the housing, and circulating hot air generated from the means through the passage. CONSTITUTION:Heating means 2 for setting an indoor temperature in a cooker housing 1 to 300 deg.C or higher to cook is provided out of the housing 1, oxygen concentration in the housing during cooking is set to 8% or less, a heat circulating passage 29 for returning heat from the means 2 again to the means 2 through an interior of the housing 1 is provided, and the heat generated from the means 2 is circulated through the passage 29. Thus, when generated oil content, odor, smoke are circulated, it is burned OFF by the means 2 to improve a self-cleaning effect and to inhibit to deteriorate a cooking environment. Since low oxygen concentration is set in the housing, an appearance of cooked food is fresh and smooth, and explosion of the oil content, a fire at the time of cooking at the high temperature can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas cooking apparatus capable of cooking by heating at high temperature.

[0002]

2. Description of the Related Art Gas cookers for accommodating food to be cooked in a cooking cabinet and heating the cooked food include ovens and grills. By the way, when the food to be cooked exceeds 260 ° C, it thermally decomposes violently to generate oily smoke, and when it exceeds about 300 ° C, the oxidation reaction of fats and oils becomes rapid, and the food to be cooked burns in a short time due to self-heating, and immediately. It becomes charred, and it is difficult to adjust the time to adjust it to a proper charred condition. Further, in the conventional case, there is a risk of ignition or explosion if the oil or fat rapidly undergoes an oxidation reaction at a temperature above about 300 ° C.

Therefore, in the conventional gas cooking apparatus, the temperature inside the refrigerator is 250 ° C. when heated by the heating means.
At present, the capacity of the heating means is designed so as not to exceed the above.

[0004]

As described above, in the conventional case, the cooking temperature is 250 ° C. or less, so that the oil and fat from the material to be cooked adheres to the inner surface of the cooking cabinet. Since the smell remains, it is necessary to clean the inside. Further, since smoke, oil and odor are directly discharged to the outside of the gas cooking apparatus, there is a problem in that the vicinity of the exhaust hole is easily soiled, the odor spreads outside the refrigerator, and the cooking environment is deteriorated. Furthermore, since the inside temperature is cooked at 250 ° C. or less, it cannot be savoryly baked, and since it is baked at a relatively low temperature for a long time, the contents tend to be hard and baked. In addition, grills have a problem that skewers such as yakitori burn. Also, since the oxygen concentration in the refrigerator during conventional cooking is around 13%,
There is a problem that the oil and fat content of the food to be cooked is oxidized and the taste is lost.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to make a high temperature cooking with an internal temperature of 300 ° C. or higher and to attach oils and fats in the cooking chamber. It can evaporate the minutes and odors during high-temperature cooking and self-clean it, and at the time of circulating hot air, it can burn off and remove oils, odors and smoke with a heating means. In addition, it is possible to reduce the oxidation of the food to be cooked during cooking and prevent self-heating to prevent excessive charring, and the oil and fat are less likely to be oxidized, so that there is provided a gas cooking device that can cook deliciously. .

[0006]

The gas cooking apparatus of the present invention is provided with a heating means 2 for cooking at an internal temperature of the cooking cabinet 1 of 300 ° C. or higher, and is provided outside the cooking cabinet 1 while cooking. The oxygen concentration in the cooking cabinet 1 is set to 8% or less, and the hot air circulation path 29 that returns from the heating means 2 through the cooking cabinet 1 to the heating means 2 is provided, and the hot air generated in the heating means 2 is the hot air. The present invention is characterized by being configured so that the circulation path 29 can be circulated. By adopting such a configuration, the problems of the conventional example described above are solved and the object of the present invention is achieved. Is.

[0007]

According to the present invention having the above construction, the cooking cabinet 1
Since the heating means 2 is provided for making it possible to cook the inside temperature of the inside of the container at 300 ° C. or higher, the inside temperature of the inside 300
The object to be cooked can be cooked by heating at a high temperature of ℃ or more. As a result, the outer surface of the object to be cooked can be quickly baked at a high temperature to be fragrantly baked and the contents can be softly baked. Further, even if oil or fat or odor adheres to the inner surface of the cooking cabinet 1, it can be vaporized during high-temperature cooking at 300 ° C or higher to perform so-called self-cleaning. It can be burnt out and eliminated when passing through the means 2.
Also, when cooking an object to be cooked at a high temperature of 300 ° C or higher,
By lowering oxygen, it slows down the oxidation reaction of fats and oils like fish and meat to suppress self-heating and obtains a suitable charred state, and by lowering oxygen, oxidation of fats and oils is reduced. It will be possible to cook with good taste, and even if the oil content reaches the ignition temperature, the oxygen concentration in the cooking cabinet 1 during cooking will be 8%.
By setting it to be less than or equal to%, the oxygen necessary for igniting the oil will be insufficient, so it is possible to prevent the pyrolyzed oil and fat from igniting or exploding in the cooking cabinet 1, By burning out the oil content when passing through the heating means 2 during circulation, the oil content is reduced, and the synergistic effect of lowering the oxygen content in the storage and reducing the oil content in the storage ignites even at higher temperatures. Etc. can be prevented.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the accompanying drawings. 1 to 7 show one embodiment of the present invention. In this embodiment, heating means 2 is provided at the rear of the cooking cabinet 1. The heating means 2 is composed of a burner 11 housed in the combustion chamber 4 and a combustion fan 15 housed in the combustion fan housing chamber 5, and a partition plate is provided between the combustion chamber 4 and the combustion fan housing chamber 5. A passage chamber 7 partitioned by 6 is provided. Reference numeral 8 in the drawing denotes a duct that connects the combustion fan storage chamber 5 and the hot air inlet 9 provided in the cooking cabinet 1 to each other. Further, the combustion chamber 4 of the heating means 2 and the cooking chamber 1 are communicated with each other through the hot air outlet 10. A burner 11 is arranged in the combustion chamber 4, and a combustion air supply port 19 for supplying combustion air is provided in the combustion chamber 4. Further, an exhaust port 13 is provided on the rear wall 12 of the combustion fan storage chamber 5, and the exhaust port 13 communicates with an exhaust passage 21 whose tip is open to the outside. A cooling fan storage chamber 14 is arranged behind the rear wall 12 of the combustion fan storage chamber 5, and the rear wall 12 and the cooling fan storage chamber 14 are separated by a heat insulating plate 22. A part of the cooling fan storage chamber 14 communicates with the exhaust passage 21, and the cooling fan storage chamber 14 is provided with a cooling air intake port 28. A cooling fan 17 is further fixed to the output shaft 16 of the combustion fan 15, the cooling fan 17 is disposed in the cooling fan storage chamber 14, and the output shaft 16 is the cooling fan storage chamber 14. It is adapted to be rotated by a motor 18 arranged rearward. Further, the front part of the cooking cabinet 1 has an opening, and the opening can be closed by a door 25 that can be opened and closed.

In the above structure, when the burner 11 burns the gas and the combustion fan 15 is rotated, the hot air generated by the heating means 2 is forced into the cooking chamber 1 through the hot air inlet 9 through the duct 8. Flowed into
The heating means 2 is heated again from the hot air outlet 10 by heating the inside of the cooking chamber 1.
The heating means 2 heats the inside of the cooking cabinet 1 while circulating the hot air so that it is heated again by the heating means 2 and is made to flow into the cooking cabinet 1 through the duct 8. The hot air inlet 9, the cooking cabinet 1, and the hot air outlet 10 form a series of hot air circulation paths 29. A part of the hot air that circulates flows from the exhaust port 13 to the exhaust passage 2
It is exhausted to the outside after passing through 1. In this case, the cooling fan 1
External air is taken in by 7 and flows into the exhaust passage 21,
The temperature of the exhaust gas discharged from the exhaust passage 21 is lowered, and the heating of the motor 18 is prevented by the cooling by the cooling fan 17 for sucking the outside air. Further, the exhaust gas discharged to the outside is not only cooled as described above, but also burner is used when oil, smoke or odor contained in the circulating hot air passes through the combustion chamber 4 of the heating means 2 as described later. It will be burned out by the flame from 11,
Therefore, when a part of the circulating hot air is cooled and exhausted to the outside, it is exhausted in a state where oil, smoke, and odor are removed, so that the external environment is not deteriorated.

By the way, in the present invention, the heating means 2 sets the capacity of the burner 11 and the capacity of the combustion fan 15 so as to heat the inside temperature to 300 ° C. or more for cooking. Therefore, it is possible to perform various kinds of cooking in a gas cooking apparatus that has been conventionally performed with an internal temperature of 250 ° C. or lower, and of course, high temperature cooking with an internal temperature of 300 ° C. or higher can be performed if necessary.

Further, in the present invention, the oxygen concentration in the cooking cabinet 1 during cooking is set to 8% or less. By the way, the oxygen concentration in the cooking cabinet 1 is the amount of exhaust gas exhausted from the exhaust port 13 (that is, because the door 25 is hermetically closed).
It is determined by the amount of air sucked from the combustion air supply port 19) and the amount of gas burned.
The shape and size of the exhaust port 13 (or the combustion air supply port 19
Shape and size), burner 11 capacity, combustion fan 1
5 is adjusted so that the oxygen concentration in the cooking cabinet 1 during cooking is 8% or less.

In the present invention, the oxygen concentration in the cooking cabinet 1 during cooking is set to 8% or less as described above, but in the embodiment, the oxygen concentration is 8% at the beginning of cooking and Oxygen concentration becomes 5 when the component begins to thermally decompose
It is set so as to be 5% or less. For example, when the temperature exceeds 300 ° C., it is controlled to be 5% or less.

Therefore, the gas cooking device of the present invention has the door 2
5 is opened to put an object to be cooked in the cooking cabinet 1 for various cooking. FIG. 4 shows an oven plate 35 in the cooking cabinet 1.
5 and 7 show an example in which a grill 37 is placed in the cooking cabinet 1 for cooking. In cooking, the burner 11 burns the gas and the combustion fan 15 is rotated to heat the heating means 2
The hot air generated in 1 is forcibly flowed into the cooking chamber 1 from the hot air inlet 9 through the duct 8 to cook the object to be cooked with the hot air. Here, the hot air that has heated the inside of the cooking cabinet 1 from the hot air inlet 9 returns to the heating means 2 again from the hot air outlet 10 by the action of the combustion fan 15, is heated again by the heating means 2 and enters the cooking cabinet 1 through the duct 8. The inside of the cooking cabinet 1 is heated while hot air is circulated so that it can be made to flow. In this case, when the hot air containing smoke or oil passes through the combustion chamber 4 of the heating means 2 during the circulation of the hot air, the flame of the burner 11 burns out the smoke or oil contained in the hot air. It goes without saying that the above cooking can be performed in the same manner as in the conventional method in which the temperature inside the refrigerator is about 250 ° C. or lower, but the temperature inside the refrigerator is 3
It is also possible to cook at a high temperature of 00 ° C or higher. When selecting a high-temperature cooking mode and cooking at a high temperature, not only the smoke, oil and odor contained in the circulating hot air are burned out, but also However, even if oil or fat drops in the cooking cabinet 1 or adheres to the inner surface of the cooking cabinet 1, it will be immediately evaporated by the hot air having a temperature of 300 ° C. or higher, so that the inside of the cooking cabinet 1 becomes dirty due to the adhesion of the oil or fat. Without this, so-called self-cleaning is performed. Therefore, even when an object to be cooked is placed on the grill 37 and cooked, the amount of oil dripping into the cooking chamber 1 is reduced, and the water tray 36 for receiving the oil and fat is placed in the cooking chamber 1. It is not necessary. Of course, impurities and the like may fall, so a water tray 36 may be provided to receive them.

By the way, in the present invention, since the oxygen concentration in the cooking cabinet 1 is set to 8% or less during cooking, in both low temperature cooking and high temperature cooking, oxidation during cooking of the object to be cooked occurs. Fewer, less likely to be browned, less likely to produce oily smoke, and prevent skewers from burning during cooking such as yakitori, which makes the cooked food sharp and mellow in taste. Moreover, in the case of high temperature cooking of 300 ° C. or higher, the low oxygen concentration of 8% or less (5% or less in the embodiment) is used to decompose the oil content. Will be able to prevent explosion and ignition. In this case, as described above, the hot air is circulated and the combustion flame of the burner 11 burns out the smoke and oil contained in the hot air, which reduces the amount of oil in the chamber and lowers the oxygen concentration. What you do is synergistic with what you do to prevent further ignition. Moreover, cooking at a high temperature of 300 ° C. makes it fragrant and soft.

Incidentally, in the graph of FIG. 8, the oxygen concentration is 5
The relationship between the amount of browning and the temperature is shown for the case of 20% and the case of 21%.
When the temperature exceeds 00 ° C, charring proceeds rapidly, so it is difficult to control the temperature in the range A, which is a moderate burn range, but the oxygen concentration is 5
In the case of%, the burning speed is slow, and therefore, the temperature control can be easily performed so that the range of A, which is an appropriate burning range, can be performed, and the mistake of overburning can be eliminated. In FIG. 8, B ₁ and B ₂ are each an oxygen concentration of 5
% A moderate burn range A in the case of 21%
3 shows the temperature region at.

[0016]

As described above, according to the present invention, since the heating means is provided for heating the inside temperature of the cooking cabinet to 300 ° C. or more, high temperature cooking is possible and it is fragrant. It can be burnt and cooked in a soft state, and even if oil adheres to the cooking cabinet, it will evaporate during high temperature cooking and will be self-cleaned, so there will be no stain or odor due to oil, There is no need to care for the inside of the refrigerator, and moreover, there is provided a hot air circulation path for returning the hot air from the heating means to the heating means through the inside of the cooking oven.
Since the hot air generated by the heating means can be circulated in the hot air circulation path, the generated oil content, odor and smoke will be burned out by the heating means during circulation, further improving the self-cleaning effect. In addition, oil, odor, and smoke are not exhausted to the outside so that the cooking environment is not deteriorated. Moreover, since the oxygen concentration in the cooking cabinet during cooking is set to 8% or less, the food to be cooked during cooking is The oils and fats are less oxidized, the oil smoke is less likely to come out, and the browning is less likely to occur. As a result, the cooked food can be cooked mellowly and the skewers do not burn even in the case of yakitori. . Also, since the inside of the chamber has a low oxygen concentration, it is possible to prevent the explosion and fire of oil during high-temperature cooking.In addition, the hot air is circulated, and the smoke and oil contained in the hot air are burned by the combustion flame of the burner. The fact that the oil is burned off reduces the amount of oil in the refrigerator and the above-mentioned low oxygen concentration synergistically does not cause further ignition and is safe.

[Brief description of drawings]

FIG. 1 is a schematic side sectional view of the present invention.

FIG. 2 is a schematic front sectional view of the above.

FIG. 3 is a schematic plan sectional view of the above.

FIG. 4 is a front cross-sectional view when the oven plate of the same is used.

FIG. 5 is a schematic front sectional view in the case of using the above water tray.

FIG. 6 is a schematic side sectional view of the above.

FIG. 7 is a schematic plan sectional view of the above.

FIG. 8 is a graph showing the relationship between the amount of browning and the temperature in the cooking cabinet when the oxygen concentration in the cooking cabinet is 5% and 21%.

[Explanation of symbols]

 1 Cooking Cabinet 2 Heating Means 29 Hot Air Circulation Path

Front page continuation (72) Inventor, Yuzuru Uchida 1-52, Minami-shi Oka, Minato-ku, Osaka 1-52 Harman Co., Ltd. (72) Inventor, Enomoto 1-52, Minami-shi Oka, Minato-ku, Osaka Osaka, Harman (72) ) Inventor Kamo Maeda 1-52, Oka, Minami-shi, Minato-ku, Osaka, Harman Co., Ltd. (72) Inventor Akashi Kegasa, 4-1-2, Hiranocho, Chuo-ku, Osaka

Claims (1)

[Claims] 1. A heating means is provided outside the cooking cabinet for setting the temperature inside the cooking cabinet to 300 ° C. or higher, and the oxygen concentration in the cooking cabinet during cooking is set to 8% or less, A gas cooking apparatus, characterized in that a hot air circulation path is provided from the heating means to return to the heating means through the interior of the cooking chamber so that hot air generated by the heating means can circulate through the hot air circulation path.