JP2009276021A - Cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooker capable of eliminating smell remaining within a cooking storage, efficiently decomposing smelling substances and preventing desorption of smelling substances. <P>SOLUTION: The cooker 100 is provided with the cooking storage 2 for storing a cooking ingredient 10 to be cooked; a solid acid substance layer 21 formed on the inner wall face of the cooking storage 2; and an ion including air introduction means including positive ions and negative ions each of which ion concentration is 10,000 ions/cm<SP>3</SP>or more and introducing ion including air having a humidity of 85% or more to inside of the cooking storage 2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention generally relates to a cooking device, and more particularly to a cooking device capable of removing odor after cooking by performing microwave cooking, grill cooking, oven cooking, and the like.

  In general, in a cooking device such as a microwave oven or an oven cooking device, odor is generated from food during cooking. Some of the odors remain in the cooking chamber after cooking. After cooking, if the odor remains in the cooking chamber, it occurs during the previous cooking, and the odor of one food remaining after cooking adheres to another food to be cooked next, so-called odor transfer occurs. There was a problem. In particular, after cooking fish, a small amount of odor remains in the cooking chamber for a long time, and when the next cooking is done, the smell of fish odor is transferred to other ingredients, giving the user an unpleasant feeling. There was a problem.

  FIG. 2 is a diagram illustrating a schematic configuration of a conventional cooking device.

  As shown in FIG. 2, in a heating cooker 200 such as a microwave cooker or an oven cooker, a food material 10 such as fish is placed in a cooking cabinet 2 of the main body 1. The food material 10 is cooked by heating means 8 such as a heater. After cooking, air is sent into the cooking chamber 2 from the outside through the air intake duct 9 by a blowing means 6 such as a fan. By the air sent into the cooking chamber 2, the air in the cooking chamber 2 is discharged to the outside through the exhaust port 7.

  In order to solve the above problem, Japanese Patent Laid-Open No. 7-42946 (Patent Document 1) introduces fresh air into the cooking cabinet 2 by the blowing means 6 as a method for removing odors, Is described in which the odor is forcibly sent to the exhaust port 7 to remove the odor in the cooking chamber 2. In this case, the odor is oxidatively decomposed by the heated deodorization catalyst placed in the exhaust port (exhaust duct) 7 and the non-brominated odor is released to the outside. As the deodorization catalyst, a catalyst in which a noble metal catalyst such as platinum is supported on a ceramic honeycomb or a silica paper corrugate is used.

  Japanese Patent Application Laid-Open No. 7-42946 (Patent Document 1) forms a heat-resistant silicone-based coating film layer containing a manganese-based catalyst and a zeolite-based adsorbent on the inner wall surface of the cooking cabinet 2, and heating means A method is described in which the odor in the cooking chamber 2 is removed by circulating the air in the cooking chamber 2 heated by 8 and contacting the catalyst.

In addition, in the heating cooker described in Japanese Patent Application Laid-Open No. 7-151333 (Patent Document 2), the surface of the heater which is the heating means 8 is provided with a deodorizing coating. In this case, when the heater is energized, the deodorizing function of the deodorizing coating is exhibited and the odor component is decomposed. Thereby, the odor remaining in the cooking chamber 2 is removed, and the air in the cooking chamber 2 from which the odor has been removed is discharged to the outside through the exhaust port 7.
JP 7-42946 A JP-A-7-151333

  However, in the conventional method of deodorizing with a catalyst, it is necessary to heat the catalyst to a high temperature in order to obtain catalytic activity. For this reason, there was a fault that power consumption became high and efficiency was bad.

  Further, it is necessary to use an expensive material such as platinum, palladium, and manganese as the catalyst material. In order to increase the deodorizing effect, it is necessary to increase the amount of the catalyst material used.

  Furthermore, after the deodorizing process, the odorous substances adhering to the inner wall surface in the cooking chamber are desorbed, increasing the odor in the closed cooking chamber and causing the odor to move to other foods. It was.

  Furthermore, when a porous adsorbent such as a zeolite adsorbent is used together with the catalyst, the adsorbed substance is likely to be gradually desorbed, and an increase in odor due to desorption becomes a cause of odor transfer in a small cooking chamber.

  In addition, when the odor component adsorbed by the porous adsorbent is decomposed by ions, there is a problem that the ions do not easily reach deep positions in the pores of the porous adsorbent and the odor component cannot be decomposed efficiently.

  Accordingly, an object of the present invention is to provide cooking that can remove the odor remaining in the cooking chamber, can efficiently decompose the odorous substance, and can prevent the desorption of the odorous substance. Is to provide a vessel.

A heating cooker according to the present invention includes a cooking chamber for storing ingredients to be cooked, a solid acid substance layer formed on the inner wall surface of the cooking chamber, and positive ions each having an ion concentration of 10,000 ions / cm ³ or more. An ion-containing air introducing means for introducing ion-containing air containing negative ions and having a humidity of 85% or more into the cooking chamber.

  In the cooking device of the present invention, since the solid acid substance layer is formed on the inner wall surface of the cooking chamber, the basic odor substance generated during cooking can be chemically adsorbed. For this reason, trimethylamine, which is a odor component of fish odor, which is particularly problematic as a cooking odor, can be strongly adsorbed on the solid acid substance layer.

  And in the cooking-by-heating machine of this invention, after cooking, the ion containing air which contains both positive and negative ions and humidity is 85% or more inside the cooking chamber which made an odor component adsorb | suck by an ion containing air introduction means. Introduce. When both positive and negative ions contained in the introduced ion-containing air act on the odorous substance, the odorous substance can be decomposed and removed. Since the action of these ions is increased in the presence of water molecules, odorous substances can be effectively removed. Although the mechanism by which positive and negative ions act is not completely clarified, it is considered that OH radicals are generated by the following reaction due to the action of positive and negative ions, and odorous substances are oxidatively decomposed.

^{_{H + (H 2 O) m}} + O 2 - (H 2 O) n → · OH + 1 / 2O 2 + (m + n) H 2 O
The ions in this reaction are presumed to be a cluster surrounded by water molecules. As the clustering by water molecules proceeds, the ions become longer-lived and stable. Thereby, it is estimated that an odor molecule | numerator decomposes | disassembles effectively.

  Further, it has been found from the examination results of the inventors that the effect of deodorization is enhanced by adding a small amount of water to the air not only with ions but also with high humidity air having a humidity of 85% or more. This is considered to be one of the causes of ion stabilization by clustering.

  Furthermore, in the cooking device of the present invention, since the solid acid substance is used as the substance that adsorbs the odor component, the solid acid substance has an advantage that it is difficult to desorb the odor component once adsorbed. In addition, since the solid acid substance has a smooth surface, ions easily act on it, and the odor substance can be efficiently decomposed.

Furthermore, if the ion concentration of positive ions and negative ions is 5000 ions / cm ³ or less, the deodorization rate is slow and a sufficient deodorizing effect cannot be obtained, but by making each ion concentration 10,000 cells / cm ³ or more, , Can be deodorized efficiently.

  From the above, in the cooking device of the present invention, it is possible to remove the odor remaining in the cooking chamber, efficiently decompose the odorous substance, and make it difficult to desorb the odorous substance. Is possible.

  In the heating cooker of this invention, it is preferable that a solid acid substance layer contains magnesium silicate.

  In this case, magnesium silicate is relatively inexpensive as a material and has an excellent ability to adsorb trimethylamine, which is a fish odor component, so that the inner wall surface of a heating cooker such as a microwave cooker or an oven cooker is used. By applying magnesium silicate over a wide area, a solid acid substance layer with high adsorption efficiency can be formed at low cost.

  Moreover, in the heating cooker of this invention, after taking out the foodstuff after cooking from an inside of a cooking chamber, it is preferable that an ion containing air introduction means introduce | transduces ion containing air automatically into the inside of a cooking chamber.

  In this way, after cooking foods where cooking odors are particularly problematic, for example, after cooking fish, ion-containing air introduction means automatically introduces ion-containing air into the cooking chamber. By automatically operating the heating cooker as described above, it is not necessary for the user to perform a deodorizing operation after cooking, and the inside of the cooking chamber can always be kept in a comfortable state.

  As described above, according to the present invention, the odor remaining in the cooking chamber can be removed, the odorous substance can be decomposed efficiently, and the desorption of the odorous substance can be made difficult to occur. Become.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a diagram showing a schematic configuration of a heating cooker according to one embodiment of the present invention.

  As shown in FIG. 1, a heating cooker 100 such as a microwave cooker or an oven cooker contains, for example, fish or the like as a food 10 to be cooked in a cooking cabinet 2 of a main body 1. The food material 10 is cooked by heating means 8 such as a heater. After cooking, air is sent into the cooking chamber 2 from the outside through the air intake duct 9 by a blowing means 6 such as a fan. By the air sent into the cooking chamber 2, the air in the cooking chamber 2 is discharged to the outside through the exhaust port 7.

  In the heating cooker 100 of this invention, the solid acid substance layer 21 is formed on the inner wall surface of the cooking chamber 2.

  In addition, ion intake air introduction means for introducing ion containing air into the cooking chamber 2 is provided in the intake duct 9. The ion-containing air introducing means includes a blowing means 6, a humidifying means for adding a small amount of moisture to the air sent from the outside to the intake duct 9 by the blowing means 6, and positive ions and negative ions to the air to which a small amount of moisture has been added. It is comprised from the ion generating element 3 which generates a positive ion and a negative ion for inclusion. The humidifying means includes a water tank 5 for storing water 50 and a filter 4 partially immersed in the water 50 in the water tank 5. The ion generating element 3 generates ions by applying a high voltage to the tip of the metal needle, and is installed in an air introduction path from the intake duct 9 into the cooking chamber 2.

  By using the ion-containing air introducing means configured as described above, fresh air can be fed into the intake duct 9 from the outside by the air blowing means 6 after cooking. Then, when the air sent into the intake duct 9 passes through the filter 4 of the humidifying means, for example, the humidity becomes high humidity air of 85% or more. By sending this high humidity air to the vicinity of the ion generating element 3, positive ions and negative ions generated from the ion generating element 3 are included in the high humidity air. Ion-containing air is introduced into the cooking chamber 2.

  In the heating cooker 100 configured as described above, since the solid acid substance layer 21 is formed on the inner wall surface of the cooking cabinet 2, the basic odor substance generated during cooking can be chemically adsorbed. For this reason, trimethylamine which is an odor component of fish odor which is a particularly problematic cooking odor can be strongly adsorbed to the solid acid substance layer 21.

  And in the cooking-by-heating machine 100 of this invention, after cooking, the inside of the cooking chamber 2 which made the odor component adsorb | sucked contains ion of both positive and negative by the ion containing air introduction means, and the ion containing humidity is 85% or more. Introduce air. When both positive and negative ions contained in the introduced ion-containing air act on the odorous substance, the odorous substance can be decomposed and removed. Since the action of these ions is increased in the presence of water molecules, odorous substances can be effectively removed. Although the mechanism by which positive and negative ions act is not completely clarified, it is considered that OH radicals are generated by the following reaction due to the action of positive and negative ions, and odorous substances are oxidatively decomposed.

^{_{H + (H 2 O) m}} + O 2 - (H 2 O) n → · OH + 1 / 2O 2 + (m + n) H 2 O
The ions in this reaction are presumed to be a cluster surrounded by water molecules. As the clustering by water molecules proceeds, the ions become longer-lived and stable. Thereby, it is estimated that an odor molecule | numerator decomposes | disassembles effectively.

  Further, it has been found from the examination results of the inventors that the effect of deodorization is enhanced by adding a small amount of water to the air not only with ions but also with high humidity air having a humidity of 85% or more. This is considered to be one of the causes of ion stabilization by clustering.

  Furthermore, in the cooking device 100 of the present invention, since the solid acid substance is used as the substance that adsorbs the odor component, the solid acid substance has an advantage that it is difficult to desorb the odor component once adsorbed. In addition, since the solid acid substance has a smooth surface, ions easily act on it, and the odor substance can be efficiently decomposed.

Furthermore, if the ion concentration of positive ions and negative ions is 5000 ions / cm ³ or less, the deodorization rate is slow and a sufficient deodorizing effect cannot be obtained, but by making each ion concentration 10,000 cells / cm ³ or more, , Can be deodorized efficiently.

  From the above, in the heating cooker 100 of the present invention, the odor remaining in the cooking chamber 2 can be removed, the odorous substance can be decomposed efficiently, and the odorous substance is hardly desorbed. It becomes possible to do.

  In heating cooker 100 which is one embodiment of the present invention, solid acid substance layer 21 contains magnesium silicate. Magnesium silicate is a relatively inexpensive material and has an excellent ability to adsorb trimethylamine, which is a fish odor component, so that it has a large area on the inner wall surface of a heating cooker 100 such as a microwave oven or an oven cooker. By applying magnesium silicate to the solid acid layer, a solid acid substance layer with high adsorption efficiency can be formed at low cost.

  Moreover, in the heating cooker 100 of this invention, after taking out the foodstuff 10 after cooking from the cooking cabinet 2, an ion containing air introduction means introduces ion containing air into the cooking cabinet 2 automatically. It may be configured.

  By doing in this way, after cooking the food in which cooking odor is particularly problematic, for example, after cooking fish, the ion-containing air introduction means automatically sends the ion-containing air into the cooking chamber 2. By automatically operating the heating cooker 100 so as to be introduced, it is not necessary for the user to perform a deodorizing operation after cooking, and the inside of the cooking cabinet 2 can always be kept in a comfortable state.

  Hereinafter, the result of having performed the comparative test about the Example and comparative example of the heating cooker of this invention is demonstrated.

Example 1
A glass container in which 1 μL of trimethylamine is placed in a cooking chamber 2 of an oven microwave oven (capacity 26 L) which is an example of a heating cooker 100 (FIG. 1) coated with a magnesium silicate film as a solid acid substance layer 21 on the inner wall surface. installed. After 30 minutes, the glass container was taken out of the cooking chamber 2 and the door of the cooking chamber 2 was opened for 1 minute. After closing the door, air blowing means from the intake duct 9 into the cooking chamber 2 at a rate of 80 L / min of high-humidity air containing positive ions and negative ions with an ion concentration of 10,000 ions / cm ³ and a relative humidity of 85% RH 6 for 30 minutes. High-humidity air was generated by passing air through the filter 4 wetted by immersing one end in water 50. For high-humidity air, an ion generating element 3 that generates ions by applying a high voltage to the tip of a metal needle is installed in the introduction path from the intake duct 9 into the cooking chamber 2, thereby allowing positive ions and negative ions to be generated. Included. The obtained ion-containing high-humidity air was introduced into the cooking chamber 2. The introduced air was naturally discharged from the exhaust port 7.

(Comparative Example 1)
A glass container in which 1 μL of trimethylamine is placed in a cooking chamber 2 of an oven microwave oven (capacity 26 L) which is an example of a heating cooker 100 (FIG. 1) coated with a magnesium silicate film as a solid acid substance layer 21 on the inner wall surface. installed. After 30 minutes, the glass container was taken out of the cooking chamber 2 and the door of the cooking chamber 2 was opened for 1 minute. After closing the door, air blowing means from the intake duct 9 into the cooking chamber 2 at a rate of 80 L / min of high-humidity air containing positive ions and negative ions each having an ion concentration of 5000 / cm ³ and a relative humidity of 88% RH 6 for 30 minutes. High-humidity air was generated by passing air through the filter 4 wetted by immersing one end in water 50. For high-humidity air, an ion generating element 3 that generates ions by applying a high voltage to the tip of a metal needle is installed in the introduction path from the intake duct 9 into the cooking chamber 2, thereby allowing positive ions and negative ions to be generated. Included. The obtained ion-containing high-humidity air was introduced into the cooking chamber 2. The introduced air was naturally discharged from the exhaust port 7.

(Comparative Example 2)
1 μL of trimethylamine was placed in a cooking chamber 2 of an oven microwave oven (capacity 26 L) which is an example of a heating cooker 100 (FIG. 1) in which an inner wall surface is coated with a tetrafluoride fluororesin instead of a solid acid substance layer. A glass container was installed. After 30 minutes, the glass container was taken out of the cooking chamber 2 and the door of the cooking chamber 2 was opened for 1 minute. After closing the door, air blowing means from the intake duct 9 into the cooking chamber 2 at a rate of 80 L / min of high-humidity air containing positive ions and negative ions with an ion concentration of 10,000 ions / cm ³ and a relative humidity of 88% RH 6 for 30 minutes. High-humidity air was generated by passing the air through the filter 4 wetted by immersing one end in the water 50. For high-humidity air, an ion generating element 3 that generates ions by applying a high voltage to the tip of a metal needle is installed in the introduction path from the intake duct 9 into the cooking chamber 2, thereby allowing positive ions and negative ions to be generated. Included. The obtained ion-containing high-humidity air was introduced into the cooking chamber 2. The introduced air was naturally discharged from the exhaust port 7.

(Comparative Example 3)
A glass container in which 1 μL of trimethylamine is placed in a cooking chamber 2 of an oven microwave oven (capacity 26 L) which is an example of a heating cooker 100 (FIG. 1) coated with a magnesium silicate film as a solid acid substance layer 21 on the inner wall surface. installed. After 30 minutes, the glass container was taken out of the cooking chamber 2 and the door of the cooking chamber 2 was opened for 1 minute. After closing the door, air blowing means 6 from the intake duct 9 into the cooking chamber 2 at a rate of 80 L / min of air having a relative humidity of 50% RH and containing positive ions and negative ions of 10000 ions / cm ^3. Introduced for 30 minutes. The humidification means consisting of the water tank 5 and the filter 4 was not used. In the air, an ion generating element 3 that generates ions by applying a high voltage to the tip of the metal needle is installed in the introduction path from the intake duct 9 into the cooking chamber 2, thereby containing positive ions and negative ions. I didn't. The obtained ion-containing high-humidity air was introduced into the cooking chamber 2. The introduced air was naturally discharged from the exhaust port 7.

  In Example 1 and Comparative Examples 1 to 3, the door was opened immediately after each treatment, and the residual odor in the cooking cabinet 2 was evaluated by the presence or absence of odors felt by humans. The results are shown in Table 1.

  As shown in Table 1, the test methods of Example 1 and Comparative Example 2 had no residual odor.

  Further, after the tests of Example 1 and Comparative Example 2 in which there was no residual odor, each was left with the door closed, and after 3 hours, the residual odor in the cooking cabinet 2 was evaluated again by the presence or absence of odors felt by humans. did. The results are shown in Table 2.

As shown in Table 1, in Comparative Example 1 in which each ion concentration of positive ions and negative ions was 5000 / cm ³ and Comparative Example 3 in which no humidification was performed, residual odor was observed after the test. Moreover, in Comparative Example 2, there was no residual odor immediately after the test as shown in Table 1 by introducing high-humidity air in which each ion concentration of positive ions and negative ions was 10,000 / cm ^3. Since the acid substance layer was not coated, as shown in Table 2, it was confirmed that when the test was allowed to stand after the test, an odor was generated in the cooking chamber 2 over time.

On the other hand, the example which formed the solid acid substance layer 21 in the inner wall face of the cooking chamber 2, and introduce | transduced into the cooking chamber 2 the high humidity air whose each ion concentration of positive ion and negative ion is 10000 pieces / cm < ³ >. In No. 1, no odor residue was observed both immediately after the test and after standing.

  From the above test results, in the cooking device 100 such as a microwave cooking device or an oven cooking device according to the present invention, the solid acid substance layer 21 is formed on the inner wall surface of the cooking chamber 2, and both positive and negative are formed in the cooking chamber 2. The odor in the cooking chamber 2 can be removed by introducing high-humidity air containing ions. Moreover, since the odor component is chemically adsorbed on the inner wall surface of the cooking chamber 2, no odor is generated due to desorption, and the odor generated by cooking of one food is attached to another food to be cooked next. Does not occur.

  In addition, since an expensive catalyst or the like is not used to remove odor as in the conventional cooking device, the cleaning function (deodorizing function in the cabinet), which was used only for high-end models, is adopted for an inexpensive popular machine. Therefore, it is possible to provide a cooking device advantageous to the user.

  The configuration of the cooking device of the present invention can be applied to a cooking device having at least one of a microwave cooking function, an oven function, a grill cooking function, a steam cooking function, and the like. It can be applied to a cooking device provided with two or more.

  It should be considered that the embodiments and examples disclosed above are illustrative and non-restrictive in every respect. The scope of the present invention is shown not by the above embodiments and examples but by the scope of claims, and includes all modifications and variations within the scope and meaning equivalent to the scope of claims.

It is a figure which shows schematic structure of the heating cooker which is one embodiment of this invention. It is a figure which shows schematic structure of the conventional heating cooker.

Explanation of symbols

  1: main body, 2: cooking chamber, 3: ion generating element, 4: filter, 5: water tank, 6: air blowing means, 7: exhaust port, 8: heating means, 9: intake duct, 10: foodstuff, 50: Water, 100: cooking device.

Claims (3)

A cooking cabinet containing the ingredients to be cooked;
A solid acid substance layer formed on the inner wall surface of the cooking chamber;
An ion-containing air introduction means for introducing ion-containing air containing positive ions and negative ions having a concentration of 10000 ions / cm ³ or more and a humidity of 85% or more into the cooking chamber; Cooking cooker.   The cooking device according to claim 1, wherein the solid acid substance layer includes magnesium silicate.   The cooking device according to claim 1 or 2, wherein the ion-containing air introduction means automatically introduces the ion-containing air into the cooking chamber after the cooked food is taken out from the cooking chamber. .

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