JPH063285Y2 - Heating cooker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a heating cooker, and more particularly to a heating cooker such as an oven and a microwave oven provided with a closed cooking chamber.

<Problems to be solved by the conventional technology and device> Conventionally, as the above-mentioned closed heating cooker, an electric heating type or gas heating type oven, a roaster, an oven toaster, a dielectric heating type microwave oven, etc. have been used. ing.
In addition, in recent years, in order to make up for the drawbacks of microwave ovens such as food not being browned, a compound-type microwave oven has been developed that uses both dielectric heating and direct heating such as electric heating or gas heating. .

However, in the closed type cooker, a large amount of oil is generated from the food during cooking by direct heating such as electric heating and gas heating, and the oil adheres to the inner wall surface of the cooking chamber, exhaust hole, etc. There was a problem of soiling.

In addition, the oil that adheres cannot be completely removed only by cleaning after cooking, and it tends to remain particularly in the corners and shades, where it is repeatedly heated during subsequent cooking and changes into a tar-like form, further sticking. There was also a problem that it became difficult to remove.

This invention has been made in view of the above circumstances, and it is possible to greatly reduce the adhesion of oil components generated during heating and cooking to the wall surface of the cooking chamber, etc., and to always keep the inside of the container clean. It is an object to provide a closed cooker.

<Means for Solving the Problems> In order to solve the above problems, the heating cooker of the present invention is configured to allow passage of heat from a heat source in the cooking chamber to accelerate the oxidative decomposition reaction of oil generated from food. And a catalyst holding means that is detachably held by a catalyst having a shape capable of convection of heat in the cooking chamber, and is formed in a shape that does not hinder the passage of heat and convection of heat in the catalyst, and the catalyst holding means. Is provided in the cooking chamber, and an elevating means for arranging the catalyst at an arbitrary position between a position directly above the food and a position separated from the food is provided.

<Operation> According to the heating cooker of the present invention having the above-described configuration, the catalyst holding means holds the catalyst for promoting the oxidative decomposition reaction of the oil component generated from food into carbon dioxide, water vapor, etc. Cooking can be performed in the arranged state.

Further, the catalyst held by the catalyst holding means has a shape such as wire mesh, honeycomb, rod, granular, lump, etc., which does not prevent heat passage and heat convection in the cooking chamber during heating, The catalyst holding means also passes heat in the catalyst,
It is formed in a shape that does not interfere with convection.

Therefore, according to the size of the food to be cooked, the catalyst holding means is moved up and down by the elevating means, and the catalyst is placed at a position where the catalytic action can be most efficiently exhibited, such as a position directly above the food, and the catalyst is heated. Since cooking can be performed, the oil content in the cooking chamber is significantly reduced.

Moreover, since the catalyst holding means holds the catalyst in a removable manner, it is easy to replace the deactivated catalyst.

<Embodiment> Hereinafter, the heating cooker according to the present invention will be described in detail with reference to the drawings showing an embodiment.

As shown in FIG. 1, the heating cooker (A) of this embodiment is
Box-shaped closed cooking chamber (1), microwave generator (2) for supplying microwave into the cooking chamber (1) to dielectrically heat food (F), and cooking chamber (1) A combined type microwave oven provided with a pair of heaters (3) (3) for directly heating the inside.

In the cooking chamber (1), a catalyst (4) for burning and oxidatively decomposing oil generated from food (F) during cooking, and this catalyst (4)
Catalyst holding means (5) for detachably holding the
A cooking dish (6) for placing (F) is arranged. Further, in the heating cooker (A), above the cooking chamber (1),
An exhaust hole (8) and a filter (8a) for cleaning the exhaust gas from the exhaust hole (8) are provided, and the catalyst holding means (5) is moved up and down on the side of the cooking chamber (1). Lifting means to hold it as possible (7)
Is provided.

The microwave generator (2) includes a microwave oscillator (21) such as a magnetron, and an output antenna (22) for supplying microwaves into the cooking chamber (1), and inside the cooking chamber (1). The output antenna (22) is attached to the cooking chamber (1) in a state where the output antenna (22) is projected into the communicating microwave supply chamber (11).

The heaters (3) (3) are sheathed heaters equipped with heating wires such as nichrome wire, and have a large number of through holes (1) that penetrate the inside and outside of the cooking chamber (1).
2) It is arranged above and below the cooking chamber (1) so as to face it.

The catalyst (4) uses a corrugated wire mesh with a small opening made of a metal wire material such as an aluminum wire as a carrier to prevent the passage of heat and the convection of heat in the cooking chamber during heating and cooking, and the surface of the corrugated wire mesh is In addition, a catalytic substance such as Pt is supported by a conventional method. Also this catalyst
(4) is for attaching to the catalyst holding means (5) described later,
The whole is flexible.

The catalyst holding means (5), as shown in FIG.
In the wire mesh (51) with a large opening so as not to prevent the passage of heat and convection of heat in the, a substantially U-shaped frame body (52) supporting this wire mesh (51), and this frame body (52) And a plurality of catalyst mounting claws (53) attached to the catalyst holding means.
The catalyst (4) is attached to the catalyst (5) by bending the catalyst (4) and inserting the peripheral portion of the catalyst (4) between the wire mesh (51) and the catalyst mounting claws (53). It is supposed to be done.

The elevating means (7) is a frame holding part (71) for holding the base end of the frame (52) of the catalyst holding means (5), and an elevating part for moving the frame holding part (71) up and down. (72), a motor (73) for driving the elevating part (72), and a power transmission part (74) composed of a large number of gears for transmitting a driving force from the motor (73) to the elevating part (72). Is equipped with. The elevating part (72) consists of a chain (72a) to which the frame body holding part (71) is fixed and upper and lower sprockets (72b) (72c), and a power transmission part (74) on the lower sprocket (72c). Are connected.

Then, when the switch of the operation panel (not shown) of the heating cooker (A) is operated to drive the motor (73), the sprocket (72c) is rotationally driven according to the rotation direction of the motor (73). The frame body holding portion (71) and the catalyst holding means (5) fixed to the chain (72a) can be raised or lowered as indicated by the arrow in the figure.

If the elevating function of the catalyst holding means (5) by the elevating means (7) is used, the catalyst (4) and the catalyst holding means (5) which may block microwaves during dielectric heating are indicated by a two-dot chain line in the figure. By retreating to the position indicated by, it becomes possible to sufficiently heat the food (F). Further, during direct heating by the heater (3) (3), by moving the catalyst holding means (5) up and down according to the size of the food (F) placed on the cooking dish (6), for example, in the figure The catalyst (4) can be arranged at a position where the catalytic action can be most efficiently exhibited, such as a position immediately above the food (F) shown by a solid line.

The elevating means (7) may be provided with a lever (75) for elevating and lowering the catalyst holding means (5) by a manual operation, as shown by a two-dot chain line in the lower part of the figure.

The catalyst substance used for the catalyst (4) is Pt.
Besides, metal catalysts such as Pd, Mo, Ag, Pt-Pd, Cu, Co,
The main component is an oxide catalyst of a metal such as Mu, Mo, V,
Conventional oxidation catalysts can be used.

As the carrier, in addition to the corrugated wire net, a carrier having a honeycomb structure made of a metal material or a ceramic material, a granular, lump, rod-shaped or plate-shaped carrier having a porous structure can be used.

The heating cooker according to the present invention is not limited to the above embodiment, and various design changes can be made without changing the gist of the present invention.

For example, the heating cooker (A) of the example was a composite type microwave oven that used both dielectric heating and direct heating, but other heating methods may be applied to the heating cooker of the present invention. it can.

Mechanisms such as the catalyst holding means (5) and the elevating means (7) can be replaced by other conventionally known mechanisms having the same function. For example, screw holding or the like can be used to hold the catalyst (4) by the catalyst holding means (5), and the lifting means (7)
It can be configured by a link mechanism or the like.

Further, for example, a catalyst holding means composed of a rotary shaft hanging from the ceiling of the cooking chamber is arranged in the cooking chamber, a rod-shaped catalyst is horizontally attached to the tip of the rotary shaft, and heating is performed while rotating the rotary shaft. By doing so, it is possible to obtain the same oil removal effect with a catalyst smaller than the catalyst (4) in the example.

As the catalyst, a wire mesh, which has a smaller open ratio than that of a honeycomb structure, and when a catalyst having a catalyst substance supported on a porous carrier is used, the catalyst surface is effectively used for the decomposition of oil, It is conceivable to provide a reversible catalyst holding means.

For example, when a catalyst in which a catalytic substance is supported on a granular or lump-shaped carrier is used, the catalyst holding means consisting of a rotating cage for accommodating the catalyst in the cooking chamber is used in order to effectively utilize the surface of each grain for the decomposition of oil. Is provided, and heating cooking may be performed while rotating the rotating basket.

<Specific Example> Hereinafter, the present invention will be described in more detail based on a specific example.

Preparation of catalyst 100 mesh aluminum wavy wire mesh (wave height 10m
m, wave interval 20 mm, external dimensions 330 mm x 300 mm) is baked in an oxygen atmosphere at 400 ° C for 3 hours to convert the surface into Al ₂ O ₃ , and then electroless is applied using a chloroplatinic acid aqueous solution with a concentration of 27 g / Platinum was supported on the surface of the wire mesh by the plating method.

Measurement of oil removal effect Cooking dish (6) (dimension 30) of the composite type microwave oven (Made by Matsushita Electric Industrial Co., Ltd., trade name Elek, NE-A900 type) shown in Fig. 1.
0 g × 270 mm) with 10 g of lard placed on it, the catalyst (4) was loaded in the catalyst holding means (5), and 50 m above the cooking dish (6).
It was placed at the m position. In addition, a weighed oil adsorption filter (8a) (ceramic fiber corrugated honeycomb) was loaded in the exhaust hole (8) above the range.

Then, while measuring the temperature of the catalyst (4), the heater (3) (3)
Was energized to raise the temperature in the cooking chamber (1), and cooking was performed at 300 ° C. for 10 minutes.

For comparison, heating was performed under the same conditions without loading the catalyst (4) on the catalyst holding means (5).

After cooking, the oil adsorption filter (8a) is collected and weighed.
The attached oil weight was calculated, and the lard remaining on the cooking dish (6) was collected and weighed. Also, the inner wall surface of the exhaust hole (8),
The oil adhering to the inner wall surface of the cooking chamber (1) was wiped off with absorbent cotton that had been weighed in advance, and this absorbent cotton was weighed to calculate the weight of the oil wiped off.

Then, the oil content removal rate was calculated from the total sum (xg) of the weights of the three oil contents by the following formula. The results are shown in Table 1.

Durability test of catalyst The heating and cooking under the same conditions as the above oil removal effect measurement were repeated using one catalyst to measure the change in oil removal rate (%). The results are shown in Table 2.

From the results shown in Table 1 above, it was found that when the catalyst was loaded, most of the oil content generated during cooking was decomposed and removed, as compared with when the catalyst was not loaded.

From the results shown in Table 2 above, the catalysts used in the specific examples are 10
It was found that the oil removal rate was maintained at 70% or more even after heating and cooking 00 times, and the durability was excellent.

<Effect of device> In the heating cooker of the present invention having the above-mentioned configuration,
In the cooking chamber, carbon dioxide of oil generated from food, catalyst holding means for holding a catalyst for promoting oxidative decomposition reaction into water vapor, etc., and raising and lowering this catalyst holding means in the cooking chamber,
Equipped with an elevating means for arranging the catalyst according to the size of the food at the position where the catalytic action can be most efficiently exerted, most of the oil generated during cooking can be decomposed and removed by the catalyst. It is possible to significantly reduce the amount of oil adhered to the room, and it is possible to keep the inside of the cooking room clean at all times.

Further, since the catalyst holding means holds the catalyst detachably, it is easy to replace the deactivated catalyst. Then, by replacing the deactivated catalyst, it is possible to always maintain the oil content removing action at a high level.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing the structure of an embodiment of a heating cooker according to the present invention, and FIG. 2 is a perspective view showing a catalyst and catalyst holding means. (A) ... Heating cooker, (1) ... Cooking room, (2) ... Microwave generator (heat source), (3) (3) ... Heater (heat source), (4) ... Catalyst, (5) ... Catalyst Holding means, (7) ... Lifting means.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References Microfilm (JP, U) of the specifications and drawings attached to the application for Japanese Patent Application No. Sho 56-121599 (No. Sho 58-25906). ) A microfilm (JP, U) in which the detailed description and drawings attached to the application for Japanese Patent Application No. 60-58218 (Japanese Utility Model Application No. 61-175805) are photographed.

Claims (2)

[Scope of utility model registration request] 1. A heating cooker comprising a closed cooking chamber and a heat source for heating and cooking the food contained in the cooking chamber, wherein the cooking chamber is oxidized with oil produced from the food. A catalyst having a shape that allows passage of heat from a heat source and convection of heat in the cooking chamber to facilitate the decomposition reaction is detachably held, and the passage of heat and convection of heat in the catalyst are not hindered. A catalyst holding means formed in a shape, and an elevating means for moving the catalyst holding means up and down in the cooking chamber to arrange the catalyst at an arbitrary position between a position directly above the food and a position away from the food. A cooking device characterized by being provided with. 2. The catalyst held by the catalyst holding means has a wire mesh shape, a honeycomb shape, a rod shape, a granular shape, or a lump shape.
The cooker described.