JPH0742946A - Heating cooker - Google Patents

Abstract

PURPOSE:To efficiently deodorize in cookings of a grill, an oven and a range by forming a heat resistant silicone coated film layer containing a manganese catalyst and a zeolite adsorbent on a wall in an oven housing to be heated by a hot air heater etc., for the oven. CONSTITUTION:A body cabinet 1 has a hot air heater 8 for an oven having a hot air fan 6 heating to cook a material 12 to be cooked in an oven housing 2, and a magnetron 14 for generating microwave to induction heat the material 12 to be cooked. Such a heating cooker comprises a heat resistant silicone coated film layer 17 containing a manganese catalyst and a zeolite adsorbent on a wall of the housing 2 to be heating at least by the heater 8. Offensive odor during cooking at low temperature of the wall of the housing 2 is deodorized by adsorption of the layer 17. On the other hand, offensive odor at high temperature of the wall is deodorized by a catalytic action of the layer 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to cooking food by heating.
For example, the present invention relates to a heating and cooking device such as a household oven grill range, and particularly to its deodorizing function.

[0002]

2. Description of the Related Art Generally, in an oven grill range, etc.
Odor and smoke are generated during cooking. In recent homes, the airtightness is good and the odors and smoke generated during such cooking not only make the user uncomfortable, but sometimes the odors stick to the walls and furniture of the room. As a method of removing this odor, the odor was forced out of the exhaust duct by the air supply fan of the oven grill range, and fresh air was taken into the kitchen (cooking room) to remove the odor inside the kitchen. There is a way. The odor is oxidatively decomposed by the heated deodorization catalyst placed in the exhaust duct, and the deodorized odor is released to the outside. The odor sources are gas and mist components generated from the cooked food placed inside the cooking cabinet and the oil and meat juice adhering to the inner wall, but the odor concentration decreases exponentially by sending in fresh air. Do it. As the deodorizing catalyst, there are a catalyst in which a precious metal catalyst such as platinum or palladium is supported on a ceramic honeycomb or a silica paper corrugate, or a catalyst in which a metal foam is supported.

The odor which is a problem during cooking is
In addition to the odor generated during cooking, there is an odor remaining in the storage after cooking. This is a small amount but high in concentration,
If the odor remains after cooking, the odor of another food may be attached to the food during the next cooking, which gives the user an unpleasant feeling.

Conventionally, during grill cooking, the above-mentioned mechanism is used to deodorize, and cooking is performed by radiant heating of infrared rays from the upper surface of the food by a heater on the ceiling. In the case of oven cooking, the hot air circulation fan on the back of the apparatus or the like circulates the air warmed by the heater into the interior of the oven to uniformly heat the interior of the oven for cooking. Therefore, it is necessary to quickly keep the temperature inside the oven constant during cooking in the oven. For this reason, in the case of oven cooking, like the deodorizing method used during grill cooking, cool outside air is sent into the refrigerator,
It is not desirable to send warm air in the refrigerator to the exhaust duct to deodorize it, because the inside of the refrigerator will cool and uniform heating will not be possible. Therefore, in oven cooking, it is generally difficult to activate the deodorizing function by the catalyst placed in the exhaust duct. In addition, the oven grill range has a range function that heats the food with microwaves normally generated by a magnetron. During this range cooking, the air in the refrigerator rises to 60 ° C level at most, and a large amount of magnetron cooling air goes into the exhaust duct, so the catalyst temperature does not rise and the amount of air to be treated by the catalyst also rises. Generally, it was difficult to deodorize when cooking in a microwave oven.

The above oven grill range and its deodorizing mechanism will be further described with reference to FIG. This figure corresponds to a sectional view taken along the line AA of FIG. 1 described later. In the figure, 1
Is a main body cabinet, 2 is an oven inside a cooking chamber, 3 is a cooking chamber door, and 5 is a handle. A hot air fan 6 for the oven, a motor 7 and a hot air heater 8 for the oven that circulate the hot air in the cold storage 2 when the function of the oven is provided are arranged on the back side of the cold storage. 9 is an exhaust duct, 10 is a catalyst mounted in this exhaust duct, 11 is a compartment 2
For discharging the exhaust gas from the exhaust gas to the exhaust duct 9, 12 for food which is a cooking product, 13 for cooling the magnetron 14 which is a microwave generation source at the time of range cooking, and discharging the water vapor trapped in the storage 2. An air supply fan, 15 is an intake duct that takes in the air. Conventionally, the air supply fan 13 is operated even in the grill mode to gently send the air in the cold storage to the exhaust duct 9, and the catalyst 10 oxidizes and decomposes it. Reference numeral 16 is a catalyst heating heater for heating the catalyst 10 when the catalyst temperature does not reach the activation temperature.

In the conventional deodorizing mechanism in the oven grill range having the above-described structure, the air cannot be deodorized unless the air inside the chamber is sent to the exhaust duct 9 by the air supply fan 13, and the oven cooks by the heat of the high temperature air inside the chamber. In cooking, the temperature inside the chamber was lowered, so such outside air could not be taken in, and therefore, it was not possible to deodorize in oven cooking. In the case of oven cooking, the temperature inside the refrigerator is set to a wide range from 170 ° C to 300 ° C, and especially in the range of 200 to 230 ° C where there are many cooking items, the air in the refrigerator 2 is used as the catalyst 1
Dedicated heater 16 that heats the catalyst 10 even if it is sent to 0
Without it, catalyst 10 could not reach a sufficient activation temperature and deodorization could not work effectively in all cooking. In addition, such a heater 16 dedicated to heating
There is a drawback in that turning on lights requires extra power, and the power efficiency of cooking is deteriorated. Further, the catalyst 10 is not activated and cannot be deodorized unless it is heated to 200 ° C. or higher.
For this reason, deodorization was not possible in range cooking where the temperature of the air in the refrigerator was low. Further, generally, in the case of range cooking, the amount of air blown was large, the catalyst temperature did not rise further, and the amount of treated air increased with respect to the catalyst volume, so deodorization could hardly be performed. There is also a method in which the catalyst heater 16 is energized for heating, but grill cooking with a high temperature in the refrigerator 2 can be heated with low power, but in the low temperature range mode, it is energized and heated. However, it was not possible to reach a sufficiently high temperature. Further, in this type of oven grill range, the cooking time for each cooking is generally 15 to 30 minutes for grilling, 15 to 60 minutes for oven cooking, and 1 to 10 minutes for range cooking. Therefore, in order to raise the temperature of the deodorizing catalyst at room temperature before use to a deodorizing activation temperature, the range cooking is too short and the deodorizing function cannot be activated.

[0007]

DISCLOSURE OF THE INVENTION In the conventional oven grill range, meat or fish may be used even when cooking in an oven, and it is also preferable to be deodorized. However, in the conventional deodorizing method, the odor remaining in the refrigerator is diluted and removed by the air taken in from the outside.However, in the oven cooking in which the outside air cannot be taken in, it remains in the refrigerator. It was not possible to remove the odor. Further, in the case of range cooking, since a large amount of magnetron cooling air flows into the exhaust duct, the temperature of the catalyst does not rise and the amount of air to be treated by the catalyst also increases, so it is generally difficult to deodorize during range cooking. However, even in range cooking, if you put food in the refrigerator without wrapping it and heat it, the odor will be collected, and especially in range cooking, the temperature of the inside wall of the refrigerator is low, so the odor tends to be absorbed by the wall surface. At the time of the next cooking, it was put on and taken off, which caused discomfort. In addition, in the oven cooking, the grill cooking, and the range cooking, generally, the user frequently uses the range function that does not have the deodorizing function, and the deodorizing function is rarely used effectively. Generally, in grill cooking, since the cooking time is about 15 to 30 minutes, there is sufficient time to heat from room temperature to an activation temperature of 200 ° C at which the function of the catalyst works, but range cooking is longer than 1 minute. Even 1
It takes about 0 minutes, and the activation temperature cannot be reached even if it is heated by another heater of the catalyst. Or it required a considerable amount of power and was unsuitable for use in home appliances. In addition, a heat-resistant coating of silicone type is usually applied to the inner wall surface of such a cooking device, but the adsorption action of this is slight, and it is almost impossible to adsorb and remove odor after the completion of cooking. . In addition, this heat-resistant coating has a poor deodorizing effect because the odor is desorbed and released almost as it is when the temperature inside the chamber rises and the temperature on the wall surface inside the chamber rises.

On the other hand, as a catalyst having adsorptivity at a low temperature, there is conventionally a catalyst installed near a defrosting heater of a refrigerator. It has an adsorbing property at a low temperature, desorbs an odor when heated, and at the same time decomposes by the catalyst to regenerate the adsorbing action. Defrost heaters are usually once every few days
It is energized for about 30 minutes at a rate of times. At this time, the air flow from the circulation duct in the refrigerator is stopped, and the deodorization inside the refrigerator is substantially impossible. That is, the deodorization in this case is performed only by the adsorption action of the inorganic carrier, and is not the one that is simultaneously decomposed and deodorized as a catalyst. That is, deodorization is not performed at the time of defrosting, and when this method is directly adopted in the oven grill range, the deodorizing function cannot be exhibited in any cooking mode.

Therefore, an object of the present invention is to provide a heating cooking device having a highly efficient catalytic deodorizing function capable of deodorizing not only grill cooking but also oven cooking and range cooking.

[0010]

In order to solve the above-mentioned problems, the present invention firstly proposes a cooking heater for heating and cooking a food in a refrigerator, and a microwave-supplied cooker for cooking the food in the refrigerator. In a heating and cooking device having a microwave source for dielectrically heating, a heat-resistant silicone-based coating film layer containing a manganese-based catalyst and a zeolite-based adsorbent is formed on at least the inner wall surface heated by the cooking heater. The point is to be formed.

Secondly, in the above-mentioned first construction, the heat-resistant silicone coating layer contains 5 to 40% by weight of manganese catalyst as manganese dioxide and 3 to 20% by weight of zeolite adsorbent. The point is to do.

Thirdly, in the above-mentioned first construction, a fluorine-based coating film layer of 20 μ is formed on the heat-resistant silicone-based coating film layer.
The gist is that it is formed to a thickness of m or less.

Fourthly, in a heating cooking device having a cooking heater for heating and cooking the food in the refrigerator, and a microwave source for inductively heating the food by supplying microwaves to the refrigerator, A heat-resistant silicone coating film layer containing a manganese-based catalyst and an inorganic adsorbent is formed on the inner wall surface heated by a heater for cooking, and at least after cooking, the air in the refrigerator is operated for a while. It is a gist to have a fan to circulate.

Fifth, in the heating cooking apparatus having a cooking heater for heating and cooking the food in the refrigerator, and a microwave generation source for inductively heating the food by supplying microwaves to the refrigerator, A heat-resistant silicone-based coating film layer containing a manganese-based catalyst and an inorganic adsorbent is formed on the inner wall surface heated by the cooking heater, and the inner wall of the inner wall is heated by energizing the cooking heater at any time. The gist is that it is configured to be heated.

[0015]

In the above structure, firstly, the heat-resistant silicone coating film layer containing the manganese catalyst and the zeolite adsorbent has physical adsorption properties at a temperature of about 100 ° C. or lower. This is due to the action of the manganese-based catalyst and zeolite contained. That is, due to the porosity of these inorganic materials.
Since this adsorption is physical adsorption, if the adsorption capacity is exceeded, adsorption becomes impossible. However, it is possible to release the adsorbed substance by heating the inner wall surface of the chamber provided with the coating layer. At this time, the taken-in odor is oxidatively decomposed by the manganese-based catalyst and deodorized. in this way,
The odor during range cooking, grill cooking, and low-temperature setting oven cooking in which the temperature of the inside wall surface is low is deodorized by the adsorption effect of the coating layer, and can be regenerated by heating. Further, during oven cooking at a high temperature setting where the temperature of the inner wall surface becomes high, deodorization is possible by decomposing the odor only by the catalytic action of the coating layer. That is, deodorization in all cooking modes can be performed with high efficiency by the two deodorizing functions of the adsorption action and the catalytic action.

Secondly, when the manganese-based catalyst is contained as manganese dioxide in an amount of 5 to 40% by weight, an effective action of odor adsorption at room temperature, odor desorption at heating, and decomposition performance can be obtained, and it is practically used. The above coating performance is obtained. When the zeolite-based adsorbent is contained in an amount of 3 to 20% by weight, excellent odor adsorption at room temperature can be obtained, and practical coating performance can be obtained.

Third, on the heat resistant silicone coating layer,
By applying a fluorine-based coating layer with a thickness of 20 μm or less,
The scratch resistance can be improved without adversely affecting the deodorizing performance.

Fourth, by operating the fan for a while to circulate the air in the refrigerator at least after the completion of cooking,
Not only the odor during cooking, but also the odor remaining in the refrigerator after the cooking is effectively adsorbed and removed by the coating layer, it is possible to prevent the discomfort during the next cooking.

Fifth, when the odor is removed by the adsorption action, the adsorption ability of the inorganic adsorbing substance contained in the coating layer is gradually saturated, and the deodorizing ability decreases. In this case, the odor is desorbed by heating the wall surface inside the chamber where the coating layer is formed at any time, and at this time, the odor is deodorized by oxidizing and decomposing the odor with a manganese-based catalyst to regenerate its adsorption ability. This makes it possible to maintain the deodorizing function semipermanently.

[0020]

Embodiments of the present invention will be described below with reference to FIGS. 1 to 9. This embodiment is applied to a household oven grill range. In FIGS. 1 to 3, the same or equivalent devices and members as those in FIG. 11 are designated by the same reference numerals, and the duplicated description will be omitted. 1 to 3, 4 is a glass barrier, and in this embodiment, although the catalyst deodorizing system in the exhaust duct is not provided, a manganese-based catalyst (M
A heat resistant silicone coating layer 17 containing 30% as nO ₂ and 8% zeolite is applied. Reference numeral 18 denotes a grill heater used for grill cooking, which is sandwiched between mica insulators 19 and fixed to the ceiling. Reference numeral 20 is a turntable used for range cooking, and 21 is a motor for driving the turntable.

Next, the deodorizing action of the oven grill range will be described. First of all, it is a high temperature oven cooking of 200 ℃ setting or more, but in the case of an oven, put a square plate in the cabinet 2 and put cooked items such as cookies and cakes on it, but at this time the hot air fan 6 fully operates, hot air The heater 8 is energized,
Heat the air in the refrigerator. The inside wall surface is 200 ~ 400 ℃
Therefore, the catalyst in the heat-resistant silicone-based coating film layer 17 reaches 150 ° C., which is necessary for catalytic activity, in about 5 minutes, and deodorization can be achieved by circulating the internal air to contact this catalyst. it can.

Next, in the case of grill cooking, when the grill heater 18 is energized, the painted surface of the ceiling portion becomes 400 to 450 ° C. during grill cooking. Therefore, in the ceiling part,
Odor can be decomposed by the catalyst contained in the heat resistant silicone coating layer 17. However, in the case of grill cooking, a square plate on which food is placed is placed, and since the heating is due to the radiation from the ceiling part, the temperature in the lower half of the container hardly rises to about 60 to 90 ° C, and the bottom is Deodorization by adsorption is also performed. At this time, the hot air fan 6 is
Stop or operate gently. This has the effect of increasing the adsorption rate. This is because the food is dried when grilled when fully rotated.

Next, microwave cooking is performed. In this case, the temperature of the catalyst rises only at a maximum of 30 to 40 ° C., and sufficient adsorption performance can be exhibited. The result of measuring the deodorizing performance by this adsorption is shown in FIG. The oven avoids disturbances,
In order to easily obtain a significant difference, the air supply fan 13 is stopped, each intake and exhaust port is closed, and the measurement is performed in a substantially sealed state. First, assuming a range cooking, the wall temperature is 30 ° C.
In comparison with the conventional heat-resistant coating (characteristic c) and the heat-resistant silicone coating layer (characteristics a and b) according to the present embodiment, the operation of the hot air fan 6 is performed based on the reduction amount of the odor (alternative substance ethanol) when The state was changed and measured. First is the odor adsorption performance at room temperature, but the conventional heat resistant coating (c characteristic)
As for the above, a decrease of 20% was observed in 30 minutes with respect to the initial concentration (150 ppm). On the other hand, in the heat-resistant silicone-based coating film layer in this example, the adsorption decreased sharply, and
It can be seen that in 0 minutes, almost 90% has been removed. At this time, when the hot air fan 6 (the hot air heater 8 is turned off) is operated, it is found that the adsorption speed is further increased (b
Characteristic). This is because driving the hot air fan 6 increases the diffusion rate of the odor and increases the frequency of the odor coming into contact with the inner wall surface of the refrigerator.

Next, assuming the grill cooking, the grill heater 1
8 was attached and measured. According to this, it can be seen that the conventional heat resistant coating desorbs and releases the absorbed odor. When the temperature rises further, the concentration gradually decreases due to the thermal expansion of the gas and the decomposition by the heat. On the other hand, in the heat-resistant silicone-based coating film layer of this example, desorption of odor was observed until the catalyst was activated at the same time as heating, but it was then rapidly reduced and it was found that deodorization was performed. .
Also, acetaldehyde, which is an intermediate product of oxidation by the catalyst of the heating and the odorous substance (ethanol), is generated in a small amount, which also confirms that the catalytic reaction works effectively. It can also be seen from this result that this acetaldehyde is gradually further oxidized by catalytic action and decomposed into carbon dioxide. Almost no acetaldehyde was found in conventional heat-resistant coatings, and it is gradually increasing due to thermal decomposition.

Next, FIG. 5 shows the deodorizing performance when the heat-resistant silicone coating film layer 17 is deodorized by the oxidative decomposition action of the catalyst as in high temperature oven cooking. This is a 180 ° C and 250 ° C in oven mode with the inside closed as well.
And ethanol was injected when the temperature inside the refrigerator reached, and the deodorizing performance was measured from the change in the temperature inside the refrigerator. According to this, it can be seen that a very high deodorizing performance is exhibited.

As described above, the deodorizing method of this embodiment can deodorize in all modes as compared with the conventional heat resistant coating. Further, this deodorizing method is particularly effective for removing the residual odor that remains in the refrigerator as described above and may be transferred to other food during the next cooking. Particularly, in range cooking, as described above, during cooking, deodorization occurs due to the adsorption and deodorization performance of the heat-resistant silicone-based coating film layer 17, but in order to prevent the glass barrier 4 from fogging due to water vapor in the refrigerator, the blower fan 13 It is unavoidable that some cooking odor may come out through the duct 9 during cooking due to the operation of the fan 1.
Since No. 3 is stopped and the outside air is not taken in, the deodorizing effect can be effectively exerted. The operating method of each mechanism will be specifically described. During the range cooking, the air supply fan 13 operates as described above to discharge the water vapor in the refrigerator. At this time, the hot air fan 6 is also operated to adsorb and remove the odor. In this case, the fan 6 may be gently rotated when the air volume is too large to affect the cooking performance. After the cooking is finished, since the air supply fan 13 is stopped, the air in the refrigerator does not go out, and the fan 6 is kept rotating for 1 to 2 minutes to remove the odor remaining in the refrigerator from the heat-resistant silicone system. It can be adsorbed and removed by the coating layer 17. Since the odor adsorbed on the coating layer 17 has a large adsorption capacity, it is hardly desorbed at a low temperature. Therefore, the odor adsorbed on the inner wall of the refrigerator as in the conventional case is desorbed at the time of the next use and does not give a disadvantage to cooking. Absent. The results of sensory evaluation of the deodorizing effect in this case are shown in FIG. This is a microwave oven provided with a conventional heat-resistant coating (e characteristic) and the heat-resistant silicone-based coating film (d characteristic) of the present example. In each range mode, the curry is heated for 2 minutes, and then the curry is taken out. , With the door closed, 2 hours later,
The odor in the refrigerator was sniffed by the 6-level odor intensity method. According to this, it can be seen that the odor intensity is lowered by 1.5 ranks in this example. This effect was confirmed even with other food odors. Next, in the case of oven cooking, the catalyst on the inner wall surface is activated during cooking to oxidize and decompose the odor and deodorize it as described above. Since it is activated, the deodorizing function can be continued. Even after the cooking is completed, the fan 6 is driven to quickly cool the catalyst body and the adsorbent contained in the heat-resistant silicone coating film layer, and the deodorization by adsorption can be quickly performed in the next range cooking or the like. Will be able to. In addition, even if the odor is saturated due to deodorization by adsorption, by occasionally performing oven cooking, the odor adsorbed by the catalyst body is desorbed,
It also plays a role of regenerating the adsorption ability of the inorganic carrier of the catalyst body. In the case of low temperature oven cooking,
Only 80 to 150 ° C rises, and deodorization by adsorption is performed. Next is the grill cooking, but during cooking, the hot air fan 6
Since the food is dried by fully rotating, the odor can be adsorbed and removed by driving it gently to adsorb and remove the odor, and by fully rotating after cooking is completed.

Next, how to regenerate the adsorption capacity. If deodorization by adsorption continues, the efficiency of odor removal becomes poor when the adsorption capacity becomes saturated. Therefore, this regeneration mode is activated periodically or at any time to restore and regenerate the deodorizing ability. In the method, the hot air fan 6 is gently rotated, and the hot air heater 8 is energized to rapidly heat the inner wall surface of the refrigerator. As a result, the odor can be desorbed from the heat-resistant silicone-based coating film, and at the same time, the odor can be decomposed with a catalyst to make it odorless. Further, it is also possible to remove the odor that has not been completely removed when the food with a strong odor intensity is cooked in the refrigerator at any time. This is often emitted from oil or food slag attached to the inner wall surface, so it is important to burn them off. Therefore, in this deodorizing mode, first, the hot air heater 8 is attached to heat the inside of the chamber and the catalyst to deodorize, and then the grill heater 18 is used.
It is possible to completely remove the odor remaining in the refrigerator by putting on, burning out the area around the ceiling, which is particularly apt to get dirty, and decomposing this odor with a catalyst.

Next, the contents of the manganese catalyst and the zeolite adsorbent in the heat resistant silicone coating layer will be described. Among them, as the content of the manganese-based catalyst increases, the amount of odor adsorbed at room temperature increases, and moreover, the odor desorption property and decomposition performance during heating improve. However, if it is added more than necessary, the filler component in the coating layer increases and the coating layer becomes brittle and cannot be put to practical use. This state is shown in FIG. This indicates the amount of ethanol that can be adsorbed by the 40 micron coating layer. According to this, when the amount of manganese-based catalyst is increased, the adsorption capacity is increased. However, above a certain level, the amount of manganese dioxide in the deep portion of the coating film, which does not act effectively, increases, so the rate of increase becomes slow. Also, 4
0mg / m ² Adsorbed coating layer up to 250 ℃ 20deg
It can be seen that when heated at a heating rate of / min, the ratio (peak time) of the released odorous substance to the total adsorption amount decreases as the manganese dioxide content increases. However, as the content increases, the performance of the coating layer deteriorates. As an evaluation method, a cross cut cross test was performed, and an adhesive strength test by peeling the tape was performed. As a result, it can be seen that when the content exceeds 40%, the adhesiveness deteriorates. Next, zeolite, which improves the adsorption capacity at room temperature, has a lower density than manganese dioxide, so it can be seen that the performance of the coating layer deteriorates with a small addition, as shown in Fig. 7 (b). It From the above, in order to achieve both deodorizing performance and coating performance, it is desirable that the manganese catalyst contains 5 to 40% by weight of manganese dioxide and the zeolite contains 3 to 20% by weight.

The relationship between the film thickness of the heat-resistant silicone coating layer and the adsorption capacity is shown in FIG. It can be seen that the thicker the film thickness, the higher the adsorption capacity, but if the film thickness becomes unnecessarily large, the adsorption capacity cannot be exhibited in the deep portion of the coating film layer, and therefore the adsorption capacity becomes saturated. If it is too thick, it may cause cracks in the coating layer. From this, it is best to set the thickness of the coating layer to about 20 to 80 microns.

Further, the heat-resistant silicone coating film layer 17 is self-decomposed by an oxidizing action of a catalyst containing an organic substance such as oil adhered onto the coating film layer 17, as compared with a usual heat-resistant coating, It also has a self-cleaning function for cleaning, which saves the trouble of cleaning the inside of the refrigerator.
Further, by applying a fluorine-based coating film layer on the surface of the heat-resistant silicone-based coating film layer 17 to a thickness of about 2 to 10 microns,
It is also possible to make it easier to wipe off when it is extremely dirty. In addition to this, the fluorine-based coating layer also has the effect of improving the sliding of contact with a square plate or the like placed in the refrigerator. However, since such a fluorine-based coating film layer having poor heat resistance cannot be applied to the portion where the wall surface temperature is 300 ° C. or higher, it is necessary to appropriately paint the coating film in an actual oven. But,
If the thickness is too thick, the surface of the heat-resistant silicone coating film layer will be covered, and the deodorizing effect will be poor.
It is preferably about 2 to 10 microns. FIG. 9 shows the relationship between this film thickness and the adsorption capacity. According to this, 2
It can be seen that when the particle size is 0 micron or more, the adsorption capacity is remarkably reduced. It was also found that cracks were generated in the fluorine-based coating film layer at 30 μm. That is, if the film thickness is about this level, generally, the fluorine-based coating film layer has a large number of holes at the molecular level, so that the deodorizing performance is not adversely affected. Further, FIG. 10 shows a case where a heat-resistant silicone coating film layer is applied to an actual oven and a fluorine-based coating film layer is not formed thereon (g characteristic), and a fluorine-based coating film is applied to the inner surface where the temperature is relatively low. The deodorizing effect when the layer was applied to a thickness of about 3 microns (f characteristic) was measured by the method shown in FIG. From this, it can be seen that the fluorine-based coating layer has no adverse effect. Further, it has been confirmed that a fluorine-based coating film layer having this thickness is also sufficient for slipperiness with respect to a square dish and scratch resistance.

[0031]

As described above, according to the present invention,
First, since a heat-resistant silicone-based coating film layer containing a manganese-based catalyst and a zeolite-based adsorbent is formed on at least the interior wall surface heated by the cooking heater, range cooking in which the interior wall surface temperature is low, The odor during grill cooking and low temperature oven cooking is deodorized by the adsorption effect of the coating layer, and in the high temperature oven cooking where the temperature of the inside wall of the cabinet rises, the odor is only due to the catalytic action of the coating layer. By disassembling it, deodorization becomes possible, and highly efficient deodorization is possible in all cooking modes including oven cooking and range cooking as well as grill cooking. In addition, it is possible to deodorize the residual odor in the refrigerator, which was difficult to remove in the past. Furthermore, even if the coating layer is heated, the odor is not desorbed and is decomposed and released. Will never happen again.

Secondly, the heat-resistant silicone coating layer contains 5 to 40% by weight of manganese catalyst as manganese dioxide and 3 to 20% by weight of zeolite adsorbent, which is excellent at low temperature. Odor adsorption, odor desorption during heating, and decomposition performance can be effectively obtained, and practically sufficient coating film performance can be obtained.

Thirdly, since the fluorine coating layer is formed to a thickness of 20 μm or less on the heat resistant silicone coating layer, the scratch resistance can be improved without adversely affecting the deodorizing performance. .

Fourthly, at least after cooking is finished, the fan is operated for a while to circulate the air in the refrigerator, so that not only the odor during cooking but also the odor remaining in the refrigerator after cooking is effective for the coating layer. It is prevented from being adsorbed and removed to give discomfort during the next cooking.

Fifth, since the cooking heater is energized to heat the inner wall surface at any time, the odor adsorbed on the coating layer is desorbed while being oxidized and decomposed by the manganese-based catalyst to regenerate the adsorption capacity. Therefore, the deodorizing function can be maintained semipermanently.

[Brief description of drawings]

FIG. 1 is an external view showing an embodiment of a heating and cooking device according to the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is a characteristic diagram showing the deodorizing performance in the range cooking and the grill cooking in the above-mentioned example together with the comparative example.

FIG. 5 is a characteristic diagram showing deodorizing performance in oven cooking in the above-mentioned embodiment.

FIG. 6 is a diagram showing a sensory evaluation result of adsorption and removal of odors remaining in the refrigerator after the completion of cooking in the above-mentioned Examples, together with Comparative Examples.

FIG. 7 shows the deodorizing performance in the content of manganese dioxide and zeolite in the heat-resistant silicone coating layer in the above examples.
It is a characteristic view which shows the evaluation result of coating film performance.

FIG. 8 is a diagram showing the relationship between the thickness of the heat-resistant silicone coating film and the adsorption capacity in the above Examples.

FIG. 9 is a characteristic diagram showing the relationship between the thickness and the adsorption efficiency of the fluorine-based coating film layer in the above-mentioned Examples.

FIG. 10 is a characteristic diagram showing the deodorizing effect with and without the fluorine-based coating layer in the above-mentioned Examples.

FIG. 11 is a plan sectional view of a conventional oven grill range.

[Explanation of symbols]

 2 Inside oven 6 Hot air fan 8 Hot air heater for oven 12 Cooked food 14 Magnetron (microwave source) 17 Heat resistant silicone coating layer 18 Grill heater

Continuation of front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location F24C 1/02 310 A 7539-3L

Claims (5)

[Claims] 1. A heating and cooking device comprising a cooking heater for heating and cooking food in a refrigerator, and a microwave source for inductively heating microwaves by supplying microwaves to the refrigerator, at least for the cooking. A heating and cooking device, characterized in that a heat-resistant silicone coating film layer containing a manganese catalyst and a zeolite adsorbent is formed on the inner wall surface heated by a heater. 2. The heat-resistant silicone coating layer comprises:
The heating and cooking device according to claim 1, wherein the manganese catalyst contains 5 to 40% by weight of manganese dioxide and the zeolite adsorbent contains 3 to 20% by weight. 3. On the heat resistant silicone coating layer,
The cooking apparatus according to claim 1, wherein the fluorine-based coating film layer is formed to a thickness of 20 μm or less. 4. A heating and cooking device comprising a cooking heater for heating and cooking food in a refrigerator, and a microwave source for inductively heating microwaves by supplying microwaves to the refrigerator, at least for the cooking. A heat-resistant silicone-based coating film layer containing a manganese-based catalyst and an inorganic adsorbent is formed on a wall surface inside the chamber heated by a heater, and at least after completion of cooking, it is operated for a while to circulate the air inside the chamber. A heating and cooking device having a fan. 5. A heating cooker comprising a cooking heater for heating and cooking food in a refrigerator, and a microwave source for inductively heating microwaves by supplying microwaves to the refrigerator, wherein at least the cooking device is provided. A heat-resistant silicone coating film layer containing a manganese catalyst and an inorganic adsorbent is formed on the inner wall surface heated by a heater, and the cooking heater is energized at any time to heat the inner wall surface. A cooking device characterized by being configured as described above.