JPH0559114U - Heating cooker - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a heating cooker equipped with a smokeless and odorless mechanism that eliminates oily smoke and odor generated during heating cooking in an oven, a microwave oven, and the like. A heater 3 for heating an object to be heated during heating and cooking is provided in a heating chamber 1 having an exhaust port 5, and oil smoke and odor generated from the object to be heated heated by the heater 3 are discharged. A first oxidation catalyst 61 is provided on the inlet side of the exhaust port 5 and a second oxidation catalyst 62 is provided on the downstream side of the first oxidation catalyst 61. The first oxidation catalyst 61 has a three-dimensional mesh shape. The surface of a metal carrier coated with manganese dioxide containing palladium is used, and the second oxidation catalyst 62 is formed of a honeycomb ceramic carrier surface coated with manganese dioxide containing a silver-based component. It was done like this.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a heating cooker equipped with a smokeless and odorless mechanism that eliminates oily smoke and odor generated during cooking with an oven, a microwave oven, and the like.

[0002]

[Prior Art]

 Conventionally, in the case of removing oil smoke and odor generated when the object to be heated housed in the heating chamber of a heating cooker such as an electric oven or a microwave oven is heated by the heating means, for example, JP-A-52-132444. Used various catalysts as disclosed in.

However, in the above cases, particularly when the object to be heated is grilled fish having a large amount of oil component, smoke and odor are particularly large, and these smoke and odor cannot be sufficiently eliminated.

In order to solve the problem of insufficient elimination of smoke and odor, an oil smoke decomposition layer and a large number of pores provided downstream of the oil smoke decomposition layer are disclosed as disclosed in Japanese Patent Publication No. 58-13817. There is a device in which an oil and smoke removing device having a double structure composed of an oxidation catalyst layer containing manganese dioxide as a main component is attached to an exhaust port formed so as to communicate with the inside of a cooking cabinet. The above-mentioned oil and smoke decomposing layer made of foamed stainless steel with innumerable minute vent holes, and other materials such as continuous flow made of a single metal such as aluminum, nickel, iron, copper or zinc or an alloy thereof. A foam having pores or a fibrous mat of these metals is used, while manganese dioxide is the main component of the oxidation catalyst layer, and a metal oxide such as copper, iron, cobalt or nickel is used as a co-catalyst. Lime aluminate is used as a binder.

On the other hand, it is disclosed in Japanese Patent Laid-Open No. 3-199822 in which a carrier made of a metal and having a mesh structure in a three-dimensional direction is provided with an oxidation catalyst function as a structure structurally comparable to the above-mentioned oil smoke decomposition layer. Japanese Patent Laid-Open No. 61-234935 discloses a deodorizing catalyst, and a honeycomb ceramic carrier made of cordierite which is structurally comparable to the above-mentioned oxidation catalyst layer and provided with an alumina washcoat containing palladium. There is a second catalyst, etc., which are structurally similar to the oily smoke decomposing layer and the oxidation catalyst layer in the respective carriers, and both having the above composition are structurally compatible. It is not presented as a structure having an oxidation catalyst function that harmlessly changes the smoke and odor generated when cooking the object to be heated into harmless and odorless.

[0006]

[Problems to be solved by the device]

 However, the oil-smoke decomposition layer disclosed in Japanese Examined Patent Publication No. 58-13817 does not have an oxidation catalyst function to change smoke and odor generated during cooking of a heated object into harmless and odorless, and does not decompose oil-smoke. The oxidation catalyst layer provided downstream of the layer is configured so that the oxidation catalyst layer itself has an oxidation catalyst function, and this oxidation catalyst layer is in harmless contact with the smoke generated by the oil smoke decomposition layer as described above. However, it is changed to odorless carbon dioxide gas and water, but when cooking a heated object with a large amount of oil components, there is a feeling that smoking and odors generated during cooking are just a step away.

[0007]

[Means for Solving the Problems]

 The present invention has been made in order to solve the above-mentioned problems, and includes a first oxidation catalyst and a second oxidation catalyst in order from the inlet side of the exhaust port that discharges oil smoke and odors generated during heating control of the object to be heated. The catalyst has a double structure, and the first oxidation catalyst is composed by coating the surface of the support consisting of a three-dimensional mesh metal structure with a material in which manganese dioxide is added with palladium, and the second oxidation catalyst is honeycomb-shaped. The surface of the carrier made of ceramic is coated with a material in which a silver-based component is added to manganese dioxide.

[0008]

[Action]

 By doing so, the high temperature oil smoke and odor generated during the cooking of the object to be heated is eliminated by the first oxidation catalyst having a high temperature activity at around 400 ° C., and the temperature after passing through the first oxidation catalyst reaches 250 ° C. After forming a turbulent exhaust gas flow with oil smoke and dilute odor that dilute and become less concentrated around ℃, this exhaust gas flow is around 250 ℃ Uniformly and effectively contact with the exhaust gas to further eliminate the oil smoke and odor remaining in the exhaust stream.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic side sectional view of a heating cooker according to the present invention, and FIG. 2 is a view showing a structure of a dual structure of an oxidizing catalyst.

In FIG. 1, reference numeral 1 denotes a heating chamber formed of a stainless steel oven formed inside the main body 4, and a heat resistant paint having a self-cleaning effect is applied to the inside thereof.

A sub-heating chamber 2 is provided above the above-mentioned heating chamber 1, and this sub-heating chamber 2 is separated from the above-mentioned heating chamber 1 by a porous metal plate that shields microwaves. A heater 3 for a grill composed of a lamp heater and a ceramic heater is provided in the sub heating chamber 2. An exhaust port 5 is provided in the upper back part of the main body 4 so as to communicate with the heating chamber 1, and an oxidation catalyst 6 is attached to the inlet of the exhaust port 5 located near the heating chamber 1. An exhaust fan 7 for exhausting the exhaust gas from the heating chamber 1 is provided on the exhaust port 5 side downstream of the oxidation catalyst 6. Reference numeral 8 is a door, which is a part that is opened and closed when the object to be heated is put in and taken out of the heating chamber 1 during cooking.

In FIG. 2, reference numeral 61 denotes a first oxidation catalyst having a support made of a Ni—Cr-based three-dimensional mesh metal structure attached to the inlet of the exhaust port 5 and having manganese dioxide ( It is constructed by coating a material in which about 1 g / l of palladium is added to γ-MnO ₂ ). Reference numeral 62 is a second oxidation catalyst having a carrier made of a honeycomb ceramic made of cordierite, which is mounted downstream of the first oxidation catalyst 62. Manganese dioxide (γ-MnO ₂ ) of 1 g is added to the carrier surface. It is formed by coating a material in which about 1 / l of silver is mixed. Both of these oxidation catalysts 61 and 62 have a double structure in which the first oxidation catalyst 61 is located at the inlet of the exhaust port 5 and the second oxidation catalyst 62 is located downstream of the first oxidation catalyst 61. I am configuring.

Next, the operation of this embodiment will be described.

In cooking, first, the door 8 is opened to store an object to be heated (not shown) in the heating chamber 1, and then the door 8 is closed.

Next, the energization of the heater 3 is started, and the exhaust fan 7 is also driven after a few minutes of heating.

After the elapse of a certain heating time, the above-mentioned object to be heated is heated, and the heating chamber 1 is filled with high temperature oil smoke and odor generated from the object to be heated.

The filled oil smoke and odor are discharged from the exhaust port 5 to the outside of the main body 4 through the first oxidation catalyst 61 and the second oxidation catalyst 62 in order by the exhaust force of the exhaust fan 7. It

Although the exhaust gas temperature at this time varies depending on the cooking conditions, the temperature of the first oxidation catalyst 61 reaches about 400 ° C.

The first oxidation catalyst 61 has good high-temperature activity at around 400 ° C., and the surface of the carrier is coated with manganese dioxide containing palladium, which withstands high temperatures. The exhaust gas has almost eliminated the odor.

After passing through the first oxidation catalyst 61, the exhaust gas is reduced to about 250 ° C. to dilute the concentration of oil smoke, and the odor is diluted to generate a turbulent flow accompanied by an odor. Form.

On the other hand, the exhaust flow that has become a turbulent flow through the first oxidation catalyst 61 contacts the second oxidation catalyst 62 uniformly and effectively.

Therefore, the temperature of the exhaust gas decreases to around 250 ° C., the concentration of oily smoke becomes lean, and the odorous exhaust flow has a good low-temperature activity at around 250 ° C. and the surface of the carrier has silver. The second oxidation catalyst 62 coated with manganese dioxide to which a system material is added further eliminates the oil fumes and odors remaining in the exhaust flow, and almost eliminates the oil fumes and odors generated from the heated object during cooking. Try to lose it.

[0024]

[Effect of the device]

 As described above, according to the present invention, the first oxidation catalyst coated with manganese dioxide containing palladium on the surface of the three-dimensional mesh metal carrier is provided on the inlet side of the exhaust port, so that high temperature activity around 400 ° C is achieved. The first oxidation catalyst eliminates the high temperature oil smoke and odor generated from the object to be heated during cooking, and the temperature decreases to around 250 ° C and the concentration of oil smoke dilutes after passing through the first oxidation catalyst. A turbulent exhaust flow with a weak odor is formed, and manganese dioxide with a silver-based material added to the surface of a honeycomb ceramic carrier is provided downstream of the first oxidation catalyst. By providing the second oxidation catalyst coated with the above, the above exhaust flow is uniformly and effectively contacted with the second oxidation catalyst having good low temperature activity at around 250 ° C. The residual oily smoke So as to further eliminate the vapor, smokeless was to eliminate the oily smoke and odor that occurs from the object to be heated at the time of cooking, it is possible to provide a heating cooker with a odorless mechanism.

[Brief description of drawings]

FIG. 1 is a schematic side sectional view of a heating cooker according to an embodiment of the present invention.

FIG. 2 is a view showing a constitution of a dual structure of the same oxidation catalyst.

[Explanation of symbols]

 1 Heating Chamber 3 Heater 5 Exhaust Port 61 First Oxidation Catalyst 62 Second Oxidation Catalyst

Claims (1)

[Scope of utility model registration request] 1. A heating chamber (1) for containing an object to be heated, a heater (3) for heating the object to be heated in the heating chamber (1), and an air discharge path for the air in the heating chamber (1). And the first oxidation catalyst (61) provided on the inlet side of the exhaust port (5)
And a heating cooker including a second oxidation catalyst (62) provided on the downstream side of the first oxidation catalyst (61), wherein the first oxidation catalyst (61) has a three-dimensional mesh. The surface of a metallic support made of manganese dioxide with palladium added is used, and the second oxidation catalyst (62) has a honeycomb-shaped ceramic support with a silver-based component added to its surface. A cooker characterized by using a manganese-coated product.