JP2007029141A - Cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooker capable of sufficiently demonstrating a catalyst performance and effectively performing cooking without obstructing heating of a cooking object. <P>SOLUTION: The cooker comprises a cooking chamber 1 for housing the cooking object 3 mounted on a gridiron 2, an upper surface heating means 4 for heating the upper surface of the cooking object 3, a lower surface heating means 5 for heating the lower surface of the cooking object 3 from the lower part of the gridiron 2, a discharge port 6 provided on the upper part of the cooking chamber 1 and communicated with the outside, and a catalyst body 8 provided on the discharge port 6. Thus, the catalyst body 8 provided on the discharge port 6 is sufficiently heated by the upper surface heating means 4 for heating the upper surface of the cooking object 3, oily smoke and odors produced from the cooking object 3 are decomposed and removed when passing through the catalyst body 8 and discharged to the outside, and since the catalyst body 8 is provided to the discharge port 6, cooking is effectively performed without obstructing the heating of the cooking object 3. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cooking device capable of removing oily smoke and odor generated by cooking.

  2. Description of the Related Art Conventionally, as this type of cooking device, one having a configuration in which oily smoke or odor discharged from a cooked product is removed by a deodorizing catalyst attached to the upper portion of the cooking device is known (see, for example, Patent Document 1). .

As shown in FIG. 4, the upper heater 22 provided on the upper side in the cooking chamber 21, the lower heater 23 provided on the lower side in the cooking chamber 21, and the food 26 to be cooked are arranged. Housed in a transparent heat-resistant glass-made cooking container 24, a container support 25 that supports the cooking container 24 between the upper heater 22 and the lower heater 23, and a food 26 that is subject to cooking by heating. And a heating and cooking vessel 24 made of transparent heat-resistant glass placed on the unit 25. And it is comprised so that the foodstuff 26 in the heating cooking container 24 may be cooked with the radiant heat from the upper and lower sides by supplying with electricity to the upper heater 22 and the lower heater 23. FIG. The cooking container 24 is composed of a container body and a lid, an opening 27 is formed in the lid, and a deodorizing catalyst 28 is provided in the opening 27.
Japanese Patent Laid-Open No. 2003-210334

  However, in the conventional configuration, since the deodorizing catalyst 28 is provided on the lid portion of the heating cooking container 24, the portion near the food 26 on which the deodorizing catalyst 28 works most efficiently (food side) is the upper heater 22. The deodorizing catalyst 28 is not sufficiently heated. Therefore, there was a problem that the odor generated from the food 26 cannot be effectively deodorized. Further, since the deodorizing catalyst 28 is disposed between the food 26 and the upper heater 22, the radiant heat from the upper heater 22 is blocked by the deodorizing catalyst 28 and is not easily transmitted to the food 26. There was also a problem that cooking performance could not be obtained sufficiently.

  This invention solves the said conventional subject, and it aims at providing the cooking device which can cook effectively, without disturbing the heating of a foodstuff while fully exhibiting catalyst performance.

  In order to solve the above-described conventional problems, a heating cooker according to the present invention includes a cooking chamber for storing a food placed on a grill, an upper surface heating means for heating the upper surface of the food, and the cooking food. A lower surface heating means for heating the lower surface from the bottom of the grill, an exhaust port provided at an upper portion of the cooking chamber and communicating with the outside, and a catalyst body provided at the exhaust port.

  As a result, the catalyst body provided at the exhaust port is sufficiently heated by the upper surface heating means for heating the upper surface of the cooked product, and the oil smoke and odor generated from the cooked product are decomposed and removed when passing through the catalyst body. In addition to being discharged, the catalyst body is provided at the exhaust port, so that cooking can be effectively performed without disturbing the heating of the food.

  The heating cooker of the present invention can fully cook the catalyst performance without disturbing the heating of the food.

  1st invention consists of the cooking chamber which accommodates the cooking put on the grill, the upper surface heating means which heats the upper surface of the cooking, and the lower surface heating which heats the lower surface of the cooking from the bottom of the grill By means of a heating cooker comprising means, an exhaust port provided in the upper part of the cooking chamber and communicating with the outside, and a catalyst body provided in the exhaust port, the catalyst body provided in the exhaust port is an upper surface of the cooked food. Since the oil and smoke generated from the cooked food are decomposed and removed and discharged to the outside when passing through the catalyst body, the catalyst body is provided at the exhaust port. It is possible to cook effectively without disturbing the heating of the food.

  According to a second aspect of the invention, in particular, in the first aspect of the invention, the catalyst body includes a structure made of a fibrous ceramic and a catalyst layer formed on the surface of the structure to constitute the catalyst body. When fibrous ceramic is used for the body, the specific surface area is large, so that the adhesion of the catalyst layer becomes stronger, and the deodorizing ability of the catalyst body can be improved.

  According to a third invention, in particular, in the first invention, the catalyst body has a structure made of metal and a catalyst layer formed on the surface of the structure. Since the conduction is excellent, the catalyst body is easily heated. Therefore, the ability to decompose oil smoke and odor can be further increased.

  According to a fourth aspect of the invention, in particular, in the second or third aspect of the invention, the structure has a honeycomb structure of 150 cells or more per inch and 500 cells or less. It is easy for air containing air to flow, and the time for contacting the catalyst body also becomes longer. Therefore, the ability to decompose oil smoke and odor can be further increased.

  In a fifth aspect of the invention, in particular, in any one of the second to fourth aspects of the invention, the catalyst layer includes at least a carrier layer mainly composed of cerium and aluminum, platinum, palladium supported on the surface of the carrier layer, By having at least one of ruthenium and rhodium, the catalyst layer is a highly active noble metal as a means for decomposing and removing oily smoke and odor generated from the cooking chamber, so that the removal capability can be increased. In addition, the catalyst layer has a carrier layer having strong adhesion between the structure and the noble metal. Therefore, it has excellent durability and can further enhance the ability to decompose oil smoke and odor.

  In a sixth aspect of the invention, in particular, in any one of the second to fourth aspects of the invention, the catalyst layer includes a carrier layer mainly composed of at least barium, cerium, and aluminum, platinum supported on the surface of the carrier layer, By having at least one of palladium, ruthenium, and rhodium, the catalyst layer is a highly active noble metal as a means for decomposing and removing oily smoke and odor generated from the cooking chamber, so that the removal capability can be increased. In addition, the catalyst layer has a carrier layer having strong adhesion between the structure and the noble metal. Therefore, it has excellent durability and can further enhance the ability to decompose oil smoke and odor.

  In the seventh aspect of the invention, in particular, in any one of the first to sixth aspects of the invention, the temperature of the catalyst body is 200 ° C. or more and 1000 ° C. or less, so that the air containing oil smoke and odor components generated from the cooking chamber Since the catalyst temperature is sufficiently increased when passing through the surface of the catalyst body, the treatment capacity of the catalyst can be increased. Further, since the catalyst temperature does not rise excessively, the catalyst is not aggregated, so that the catalyst is not deteriorated. Therefore, it is excellent in durability and can further improve the ability to decompose oil smoke and odor.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment)
FIG. 1 shows a cooking device according to an embodiment of the present invention.

  As shown in the figure, a heating cooker 10 according to the present embodiment includes a cooking chamber 1 that houses a food 3 such as seafood placed on a grill net 2, a sheathed heater that heats the upper surface of the food 3 and the like. The upper surface heating means 4, the lower surface heating means 5 such as a sheathed heater for heating the lower surface of the cooked food 3 from below the grill 2, and the exhaust port 6 provided in the vicinity of the upper surface heating means 4 in the upper part of the cooking chamber 1. And an exhaust passage 7 that communicates with the outside through the exhaust port 6, a catalyst body 8 provided at the exhaust port 6, and a tray 9 on which the grill net 2 is placed. The exhaust passage 7 is equipped with a cross flow fan or the like as a blowing means.

  About the cooking-by-heating machine comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, the food 3 placed on the grill 2 is cooked by heating from the upper surface heating means 4 and the lower surface heating means 5. High-temperature oily smoke and odor components are generated from the heated food 3, move to the upper part of the cooking chamber 1, and pass through the catalyst body 8 of the exhaust port 6 provided at the upper part of the cooking chamber 1. On the other hand, the catalyst body 8 is heated to a high temperature by the upper surface heating means 4, and the passing oil smoke and odor components are decomposed by the catalyst body 8 heated to a high temperature and released to the outside through the exhaust passage 7. Moreover, since the catalyst body 8 is provided in the exhaust port 6, it can cook without preventing the heating of the foodstuff 3 by the upper surface heating means 4. FIG.

  Here, as the catalyst body 8, when a structure made of a fibrous ceramic and a catalyst layer formed on the surface of the structure are used, the fibrous ceramic is used for the structure constituting the catalyst body. Since the specific surface area is large, the adhesion of the catalyst layer becomes strong and the deodorizing ability of the catalyst body can be improved. Further, when a metal is used for the structure instead of the fiber ceramic as the catalyst body 8, the heat conduction is excellent, so that the catalyst body is easily heated. Therefore, the ability to decompose oil smoke and odor can be further increased.

  As described above, the heating cooker according to the present embodiment can fully cook the catalyst performance without disturbing the heating of the cooked food, and can not feel oily smoke and odor to the outside. Can be provided.

  Next, (Experimental example 1) to (Experimental example 6) of the heating cooker in the present embodiment will be described.

(Experimental example 1)
A heating cooker having the configuration shown in FIG. 1 was used as the heating cooker 1A in the present embodiment, and a heating cooker having the configuration shown in FIG. 4 was used as the heating cooker 1B as a comparative example. In both cases, the catalyst body 8 uses a honeycomb structure of 300 cells per inch made of fibrous ceramic, and the catalyst layer formed on the surface of the structure has an oxide carrier layer and a carrier mainly composed of aluminum. And platinum supported on the surface of the layer.

  The heating cookers 1A and 1B were evaluated using the following means. Two sword fish were placed in the cooking chamber of the heating cooker, and the hydrocarbon concentration was measured as the total amount of odorous components discharged from the exhaust port from the start of cooking until the end of cooking at every elapsed time. The result is shown in FIG.

  As can be seen from FIG. 2, the cooking device 1 </ b> A has a lower concentration of discharged hydrocarbons than the cooking device 1 </ b> B. In particular, the heating cooker 1A has a low hydrocarbon concentration even when the most oily smoke or odor is generated at the end of cooking, and the difference from the heating cooker 1B is clear. Thus, it can be seen that the heating cooker 1A in the present embodiment has higher performance than the heating cooker 1B even when a large amount of oil smoke or odor is generated, and can process a large amount of oil smoke or odor components.

(Experimental example 2)
As heating cooker 2A in the present embodiment, catalyst body 8 uses a honeycomb structure of 300 cells per inch made of metal instead of fibrous ceramic. Others are the same as Experimental Example 1.

  The result of measuring the hydrocarbon concentration in the same manner as in Experimental Example 1 is shown in FIG.

  As can be seen from FIG. 3, the cooking device 2A has a lower concentration of the discharged hydrocarbon. This is because the structure forming the catalyst body 8 is a metal, so the temperature rises quickly, the hydrocarbon concentration is low even in the early stages of cooking, and the hydrocarbon concentration is low even when most of the smoke and odor are generated at the end of cooking. It has become. Thereby, it turns out that 2A of heating cookers in this Embodiment have high performance, and can process many oily smoke and odor components, even when the amount of generation of oily smoke and odor is large.

(Experimental example 3)
As heating cooker 3A in the present embodiment, catalyst body 8 uses a honeycomb structure made of fibrous ceramic, and the catalyst layer formed on the surface of the structure is an oxide carrier layer mainly composed of aluminum. And platinum supported on the surface of the carrier layer.

  Then, the honeycomb structure was evaluated using the following means by changing the number of cells per inch to 100, 150, 200, 300, 400, 500, 600 cells.

  Put two sword fish in the cooking chamber of the heating cooker, measure the hydrocarbon concentration as the total amount of odor components discharged from the exhaust port from the start of cooking 8 minutes to the end of cooking (18 minutes from the start), and calculate the average value for 10 minutes I asked. The results are shown in (Table 1).

  As apparent from (Table 1), according to the heating cooker 3A in the present embodiment, if the number of cells per inch of the honeycomb structure is 150 cells or more and 500 cells or less, it is an odor component to be discharged. It can be seen that the hydrocarbon concentration is low. In particular, when the number of cells per inch is 200 cells and 300 cells, the activity is high and the hydrocarbon concentration is low. Thus, the heating cooker 3A according to the present embodiment uses a honeycomb structure having a structure of 150 to 500 cells, preferably 200 cells and 300 cells per inch, as the structure of the catalyst body 8. It can be seen that oil smoke and odor components can be processed.

(Experimental example 4)
As heating cooker 4A in the present embodiment, catalyst body 8 uses a honeycomb structure of 300 cells per inch made of fibrous ceramic, and the catalyst layer formed on the surface of the structure is mainly composed of aluminum. It was composed of an oxide support layer and platinum supported on the surface of the support layer. The carrier layer was evaluated using the following means in the case where at least aluminum and cerium were the main components, or at least barium, cerium and aluminum were the main components.

  Put two sword fish in the cooking chamber of the heating cooker, measure the hydrocarbon concentration as the total amount of odor components discharged from the exhaust port from the start of cooking 8 minutes to the end of cooking (18 minutes from the start), and calculate the average value for 10 minutes I asked. The results are shown in (Table 2).

  As apparent from (Table 2), according to the heating cooker 4A in the present embodiment, the concentration of hydrocarbons, which are odorous components, is low if a carrier mainly composed of aluminum is used as the carrier layer. I understand. In particular, when cerium or barium is mixed with aluminum, its activity is high and the hydrocarbon concentration is low. As a result, the cooking device 4A in the present embodiment uses a large amount of oil smoke or odor by using a carrier layer mainly composed of cerium and aluminum or a body composed mainly of barium, cerium and aluminum. It can be seen that the ingredients can be processed.

(Experimental example 5)
As heating cooker 5A in the present embodiment, catalyst body 8 uses a honeycomb structure of 300 cells per inch made of fibrous ceramic, and the catalyst layer formed on the surface of the structure is mainly composed of aluminum. It was composed of an oxide support layer and a noble metal supported on the surface of the support layer. And evaluation was performed using the following means, changing noble metals into platinum, palladium, ruthenium, and rhodium.

  Put two sword fish in the cooking chamber of the heating cooker, measure the hydrocarbon concentration as the total amount of odor components discharged from the exhaust port from the start of cooking 8 minutes to the end of cooking (18 minutes from the start), and calculate the average value for 10 minutes I asked. The results are shown in (Table 3).

  As can be seen from (Table 3), according to the heating cooker 5A in the present embodiment, it can be seen that the concentration of hydrocarbons, which are odorous components discharged when noble metal is used, is low. In particular, when platinum or palladium is used, its activity is high and the hydrocarbon concentration is low. Thereby, it turns out that 5 A of heating cookers in this Embodiment can process many oily smoke and an odor component by using at least 1 sort (s) of platinum, palladium, ruthenium, and rhodium as a noble metal.

(Experimental example 6)
As heating cooker 6A in the present embodiment, catalyst body 8 uses a honeycomb structure of 300 cells per inch made of fibrous ceramic, and the catalyst layer formed on the surface of the structure is mainly composed of aluminum. It was composed of an oxide support layer and platinum supported on the surface of the support layer. Then, the temperature of the catalyst body 8 was changed to 150, 200, 400, 600, 800, and 1000 ° C., and evaluation was performed using the following means.

  Put 4 sword fish in the cooking chamber of the heating cooker, measure the hydrocarbon concentration as the total amount of odorous components discharged from the exhaust port from the start of cooking 10 minutes to the end of cooking (20 minutes from the start), and calculate the average value for 10 minutes I asked. The results are shown in (Table 4).

  As can be seen from (Table 4), according to the heating cooker 6A in the present embodiment, the higher the temperature of the catalyst body 8, the lower the concentration of hydrocarbons, which are odor components discharged. On the other hand, if the temperature of the catalyst body 8 exceeds 1000 ° C., the noble metal catalyst is agglomerated, which is not suitable from the viewpoint of performance. Thereby, it turns out that the heating cooker 5A in this Embodiment can process many oily smoke and an odor component by making the temperature of the catalyst body 8 into 200-1000 degreeC, desirably 400-600 degreeC.

  As described above, the heating cooker according to the present invention is capable of cooking effectively without disturbing the heating of the cooked food while fully exhibiting the catalytic performance, and is particularly related to the cooking device system. It can be applied widely, and can be applied regardless of whether it is a large or small cooker.

1 is a cross-sectional front view showing the configuration of a heating cooker according to an embodiment of the present invention. The graph which shows the hydrocarbon concentration at the time of one catalyst body use of the same heating cooker and a comparative example Graph showing the hydrocarbon concentration when using other catalyst bodies in the same cooking device Configuration diagram showing the configuration of a conventional cooking device

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cooking chamber 2 Grilling net 3 Cooked food 4 Upper surface heating means 5 Lower surface heating means 6 Exhaust port 7 Exhaust passage 8 Catalyst body

Claims (7)

A cooking chamber for storing the food placed on the grill, an upper surface heating means for heating the upper surface of the food, a lower surface heating means for heating the lower surface of the food from below the grill, and the cooking chamber A heating cooker provided with an exhaust port provided at an upper portion of the gas outlet and communicating with the outside, and a catalyst body provided at the exhaust port. The cooking device according to claim 1, wherein the catalyst body includes a structure made of a fibrous ceramic and a catalyst layer formed on a surface of the structure. The cooking device according to claim 1, wherein the catalyst body includes a structure made of metal and a catalyst layer formed on a surface of the structure. The cooking device according to claim 2 or 3, wherein the structure has a honeycomb structure of 150 cells or more and 500 cells or less per inch. 5. The catalyst layer according to claim 2, wherein the catalyst layer includes a support layer mainly composed of at least cerium and aluminum, and at least one of platinum, palladium, ruthenium, and rhodium supported on the surface of the support layer. The cooking device described. 5. The catalyst layer according to claim 1, comprising at least one of a carrier layer mainly composed of barium, cerium, and aluminum, and at least one of platinum, palladium, ruthenium, and rhodium supported on the surface of the carrier layer. The heating cooker according to item. The cooking device according to any one of claims 1 to 6, wherein the temperature of the catalyst body is 200 ° C or higher and 1000 ° C or lower.