JPH07158858A - Steam generator for high-frequency heating - Google Patents

Abstract

PURPOSE:To provide a high-frequency heating steam generator, generating a much amount of steam in a short period of time with a simple constitution and, further, keeping the inside of an oven clean. CONSTITUTION:A high-frequency heating device is constituted so that at least the bottom surface of a high-frequency wave absorbing porous body 22, absorbing high-frequency energy and generating heat, is dipped into a high-frequency heating device, in which a steam generator 24, covered by a moisture impermeable film 23, is wetted by water. According to this constitution, a much amount of steam is generated in a short period of time due to the enlargement of a contacting area between water and air and a highly efficient absorption of high-frequency energy whereby the drying of a food can be prevented and the dropping of condensate of water vapor or water, which descends by the gravity thereof into the lower side of a high-frequency heating steam generator 24, can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steam generator for high frequency heating of a cooking device for heating an object to be heated such as food by high frequency.

[0002]

2. Description of the Related Art An example of a conventional cooking device such as a microwave oven will be described with reference to FIG. FIG. 7 is a sectional view of the microwave oven. Reference numeral 31 denotes an oven, and high-frequency electromagnetic waves generated by the high-frequency oscillator 32 are supplied into the oven by the waveguide 33, and the food 34 such as food on the dish 35 to be heated is heated. However, in the above-described configuration, as the object to be heated such as food is heated by the high frequency electromagnetic wave, the moisture in the object to be heated is evaporated and the surface of the object to be heated is dried.

In order to make up for such drawbacks, steam microwave ovens have been proposed. FIG. 8 is a sectional view of the steam microwave oven. In addition to the configuration of the microwave oven of FIG.
It has a configuration including a high-frequency heating steam generator 42 having a water tank 43 and a heater 41. Oven 36
An object to be heated 39 such as food placed on the object-to-be-heated plate 40 in the inside is generated by the high-frequency oscillator 37 and generated by the waveguide 38.
It is heated by the high frequency electromagnetic waves guided into the oven chamber 36 by the above. Further high-frequency heating steam generator 4
The water in 2 is converted to steam 44 by the heater 41,
It is discharged into the oven chamber 36 and prevents drying of the object to be heated during cooking.

[0004]

However, in the above-mentioned conventional structure, the structure is complicated because the steam generator 42 for high-frequency heating, which is composed of the heater 41 and the water tank 43, is separately provided. Steam generator 42
There was a problem that the supply of water to and the treatment of drain water were complicated.

The present invention is intended to solve the above problems, and it is a first object of the present invention to realize a steam generator for high-frequency heating, which has a simple structure without a heater or the like and generates steam in a short time. .

A second object is to obtain a steam generator for high frequency heating which has a simple structure and produces a large amount of steam.

A third object is to realize a high-frequency heating steam generator for a microwave oven which has a simple structure and can keep the inside of the oven clean.

[0008]

In order to achieve the above object, the steam generator of the present invention has the following constitution.

The heat-resistant porous body contains water and releases the water as water vapor upon irradiation with a high frequency, and a mounting table on which the heat-resistant porous body is mounted.

Further, the high frequency absorbing porous body which absorbs high frequency energy containing water and generates heat to release the water as water vapor is composed of a mounting table on which the high frequency absorbing porous body is mounted.

Further, a heat-resistant porous body having a high-frequency absorption layer that contains water and absorbs high-frequency energy to generate heat to release the water as water vapor, and the heat-resistant porous body are mounted.

At least the bottom surface of the heat resistant porous body is covered with a moisture impermeable film. At least the bottom surface of the high-frequency absorption porous body is covered with a moisture impermeable film.

At least the bottom surface of the heat resistant porous body having the high frequency absorption layer is covered with a water impermeable film.

[0014]

According to the present invention, in the above structure, when water is contained in the heat resistant porous body, water wets the entire surface of the heat resistant porous body by surface tension, and water having the same contact area between water and air is put in a dish or the like. It becomes several times higher than that in the case where water absorbs high-frequency energy, and the evaporation rate increases. Therefore, by performing the high-frequency heating by placing the steam generator for high-frequency heating containing water to be heated together with the object to be heated such as food in the oven of the heating cooker that heats using high-frequency electromagnetic waves, immediately after high-frequency heating The generated steam can prevent the object to be heated from drying during cooking. Further, the heat-resistant porous body is placed on the dish-shaped mounting table, so that it is possible to prevent water descending due to gravity or condensed water from falling below the steam generator for high frequency heating. Furthermore, because of the simple configuration without using a heater etc., the steam generator for high frequency heating can be put in and taken out of the oven cabinet, and it is possible to easily supply water and treat drain water. Can be kept clean.

Further, when water is contained in the high-frequency absorbing porous body or the heat-resistant porous body having the high-frequency absorbing layer formed by the above-described structure, the water wets the entire surface of the high-frequency absorbing porous body due to surface tension, so that water and air The contact area is several times that in the case where water of the same volume is put in a dish, etc., and the evaporation rate of water that has absorbed high-frequency energy is increased. Further, the heat generated by the high-frequency absorbing porous body or the high-frequency absorbing layer absorbing high-frequency energy promotes evaporation, and efficiently generates a large amount of water vapor in the oven of the heating cooker for heating using high-frequency electromagnetic waves. I can do things.

Further, the water impermeable membrane covering at least the bottom surface of the heat-resistant porous body, the high-frequency absorbing porous body or the heat-resistant porous body having the high-frequency absorbing layer receives water falling down by gravity under the high-frequency heating steam generator. It is possible to keep the inside of the oven clean with a simple structure.

[0017]

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

(Embodiment 1) An embodiment of the present invention will be described with reference to FIGS.

In FIG. 1, reference numeral 1 is a heat-resistant porous body such as ceramics, and 2 is a dish-shaped mounting table on which the heat-resistant porous body is placed.

When water is included in the high-frequency heating steam generator 3 having the above-mentioned structure, the water wets the entire surface of the heat-resistant porous body 1 by surface tension, and for example, the volume of 30 cc is 60 P.
The contact area of water and air is 0.12 m ^{3 in the} steam generator for high frequency heating composed of ore / inch ceramic porous body.
When compared with the case where the same volume of water is put in a dish, the evaporation rate of water that absorbs high-frequency energy is about 40 times higher, and the evaporation rate is higher.

Therefore, as shown in FIG. 2, the inside of the oven 5 of the heating cooker 4 for heating by utilizing high frequency electromagnetic waves such as a microwave oven comprising at least an oven 5 for storing food and a high frequency generator 6 is provided. When the steam generator 3 for high frequency heating is put together with the object 7 to be heated such as food and heating is performed at a high frequency output of 700 W, the steam 8 is higher than that in the steam generator for high frequency heating in which water is simply put in a dish. The generation amount of is improved by 20%, steam is generated immediately after high frequency heating, and it is possible to prevent the heated object from being dried during cooking.

Further, as shown in FIG. 1, the steam generator 3 for high frequency heating has a simple structure without a heater or the like, so that it can be put in and taken out of the oven chamber 5 for water supply and drain water treatment. It can be done easily.

Further, the heat-resistant porous body 1 is placed on the plate-shaped mounting table 2 to prevent water descending by gravity or condensed water of steam from falling below the high-frequency heating steam generator 3, The inside of the oven chamber 5 can be kept clean.

(Embodiment 2) Another embodiment of the present invention is shown in FIG.
This will be described with reference to FIG.

FIG. 3 (a) is a sectional view of an embodiment of the steam generator for high frequency heating of the present invention, and FIG. 3 (b) is a partially enlarged sectional view thereof. In FIG. 3 (a), 10 is a high-frequency absorption porous body, and examples of the material include semiconductor materials having excellent high-frequency absorption characteristics, and particularly zinc, copper, manganese, cobalt, iron, tin, titanium, and silicon as main components. Oxide,
Carbides and those composed of at least one kind of perovskite type composite oxide containing the above metal, for example, silicon carbide, and many cavities are formed inside as shown in FIG. 3 (b). The high-frequency absorbing porous body 10 is mounted on a dish-shaped mounting table 11.

When the steam generator 12 for high frequency heating having the above-mentioned structure is made to contain water, the water wets the entire surface of the heat resistant porous body 1 by the surface tension as in the case of the first embodiment.

As shown in FIG. 4, food or the like is placed in the oven 14 of the heating cooker 13 for heating by utilizing high frequency electromagnetic waves such as a microwave oven including at least an oven 14 for storing food and a high frequency generator 15. When the steam generator 3 for high frequency heating containing water together with the object to be heated 16 is put into high frequency heating, a part of the high frequency energy is absorbed by the water on the surface of the high frequency absorption porous body 11 and becomes thermal energy. The water is heated and evaporated. Further, a part of the high frequency energy is absorbed by the high frequency absorption porous body 11 to become heat energy, which heats and evaporates the water that wets the surface of the high frequency absorption porous body 11. Therefore, the high-frequency heating steam generator of this configuration can efficiently convert water into steam by high-frequency energy. Therefore, when heating with a high-frequency output of 700 W, in the case of a high-frequency heating steam generator with water in a dish. Compared with this, the amount of steam 17 generated is approximately doubled, and it is possible to prevent the object to be heated from drying during cooking.

Further, the dish-shaped mounting table 11 on which the heat-resistant porous material is mounted can receive the water falling down below the high-frequency steam generator due to gravity, and the inside of the oven can be kept clean.

(Embodiment 3) Another embodiment of the present invention will be described with reference to FIG.

FIG. 5 (a) is a sectional view of an embodiment of the steam generator for high frequency heating according to the present invention, and FIG. 5 (b) is a partially enlarged sectional view thereof. In FIG. 5A, reference numeral 18 denotes a high frequency absorption layer, and examples of the material include semiconductor materials having excellent high frequency absorption characteristics, and particularly zinc, copper, manganese, cobalt, iron, tin, titanium, and silicon as main components. Oxide,
A structure in which a high-frequency absorption layer 19 is attached to the surface of the ceramic porous body 18 and is placed on a placing table 20 on a plate, which is a carbide, a substance made of at least one kind of perovskite type complex oxide containing the metal, such as a silicon carbide whisker. Has become.

When the high-frequency heating steam generator 21 having the above-mentioned structure contains water, the high-frequency absorption layer 19 attached to the heat-resistant porous body 18 due to the surface tension of the water is the same as in the first and second embodiments. Wet the entire surface of.

Therefore, in the same manner as in the second embodiment, the high-frequency heating steam in which water is contained together with an object to be heated such as food in an oven of a heating cooker for heating by utilizing high-frequency electromagnetic waves of a microwave oven or the like. When the generator 21 is put in and high-frequency heating is performed, a part of the high-frequency energy is absorbed by the water on the surface of the high-frequency absorption layer 19 and becomes heat energy to heat and evaporate the water. Further, part of the high frequency energy is the high frequency absorption layer 19
Is absorbed into heat energy and heats and evaporates the water that wets the surface of the high-frequency absorption layer body 19. Therefore, since the steam generator for high frequency heating of this configuration can efficiently convert water into steam by high frequency energy, the high frequency output 7
When heated at 00W, the amount of steam 17 generated is about twice as much as in the case of a high-frequency steam generator in which water is put in a dish, and it is possible to prevent the heated object from drying during cooking. .

Furthermore, the dish-shaped mounting table 20 on which the heat-resistant porous material is mounted can receive the water falling down below the high-frequency steam generator due to gravity, and the inside of the oven can be kept clean.

(Embodiment 4) Another embodiment of the present invention will be described with reference to FIG.

FIG. 6 (a) is a sectional view of an embodiment of the steam generator for high frequency heating according to the present invention, and FIG. 6 (b) is a partially enlarged sectional view thereof. In FIG. 6, 22 is the second embodiment.
It is a high-frequency absorbing porous body such as a silicon carbide porous body having a large number of cavities formed therein, which absorbs high-frequency energy and generates heat as shown in FIG. Reference numeral 23 is a moisture impermeable film such as silicon carbide having a dense structure, which covers at least the bottom surface of the high-frequency absorption porous body 22.

Similar to the second embodiment, the high-frequency heating steam generator 24 in which water is contained together with an object to be heated such as food is placed in a heating cooker which uses high-frequency electromagnetic waves for high-frequency heating. In this case, since the high-frequency heating steam generator of this configuration can also efficiently convert water into steam by using high-frequency energy, when heating with a high-frequency output of 700 W, in the case of a high-frequency heating steam generator with water in a dish Compared with this, the amount of steam 17 generated is approximately doubled, and it is possible to prevent the object to be heated from drying during cooking.

Further, the water-impermeable film 22 covering at least the bottom surface of the high-frequency absorbing porous body 22 can receive water falling down below the high-frequency steam generator due to gravity, so that the inside of the oven chamber can be easily constructed. You can keep it clean.

Instead of the high-frequency absorbing porous body 22, moisture-impermeable at least the bottom surface of the heat-resistant porous body such as ceramic shown in Examples 1 and 3 or the ceramic porous body having the high-frequency absorbing layer adhered to the surface thereof. Even in the structure covered with a film, in addition to each effect, the inside of the oven can be kept clean with a simple structure having a small number of parts.

[0039]

As described above, the steam generator for high frequency heating of the present invention has the following effects.

(1) The evaporation area of the water contained in the high-frequency heating steam generator is expanded by the high-frequency heating steam generator consisting of the heat-resistant porous material and the dish-shaped mounting table on which the heat-resistant porous material is placed. It is possible to realize a high-frequency heating steam generator having a simple structure in which water is evaporated in a short time and a heater or the like is not provided.

(2) A structure comprising a high-frequency absorbing porous body that absorbs high-frequency energy and generates heat, or a heat-resistant porous body on which a high-frequency absorbing layer that absorbs high-frequency energy and generates heat and a plate-shaped mounting table on which the porous body is placed are placed. It is possible to realize a steam generator for high-frequency heating with a simple structure that produces a large amount of steam.

(3) The high frequency heating steam generator has a structure in which at least the bottom surface is covered with a moisture impermeable film, so that the inside of the oven chamber can be kept clean, and a simple high frequency heating steam generator with a small number of parts is provided. Can be realized.

[Brief description of drawings]

FIG. 1 is a sectional view of a steam generator for high-frequency heating according to an embodiment of the present invention.

FIG. 2 is a configuration diagram showing a case where the steam generator for high frequency heating is used in a high frequency cooking device.

FIG. 3 is a sectional view of a steam generator for high frequency heating in another embodiment of the present invention.

FIG. 4 is a configuration diagram showing a case where the high-frequency heating steam generator is used in a high-frequency cooking device.

FIG. 5 is a sectional view of a steam generator for high frequency heating according to another embodiment of the present invention.

FIG. 6 is a sectional view of a steam generator for high frequency heating according to another embodiment of the present invention.

FIG. 7 is a sectional view of a conventional microwave oven.

FIG. 8 is a sectional view of a conventional steam microwave oven.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heat resistant porous body 2 Mounting table 3 Steam generator for high frequency heating 10 High frequency absorption porous body 11 Mounting table 18 High frequency absorption layer 19 Heat resistant porous body 20 Mounting table 22 High frequency absorption porous body 23 Water impermeable membrane

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Miki Moriguchi 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Yu Fukuda, 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd.

Claims (6)

[Claims] 1. A steam generator for high-frequency heating, comprising a heat-resistant porous body that contains water and releases the water as water vapor upon irradiation with a high-frequency wave, and a mounting table on which the heat-resistant porous body is mounted. 2. A high-frequency absorption porous body that contains water and absorbs high-frequency energy to generate heat to release the water as water vapor.
A steam generator for high frequency heating, comprising a mounting table on which the high frequency absorption porous body is mounted. 3. A high-frequency heating steam generator comprising a heat-resistant porous body having a high-frequency absorption layer which contains water and absorbs high-frequency energy to generate heat to release the water as water vapor, and a mounting table on which the heat-resistant porous body is mounted. vessel. 4. The steam generator for high frequency heating according to claim 1, wherein at least the bottom surface of the heat resistant porous body is covered with a moisture impermeable film. 5. The steam generator for high frequency heating according to claim 2, wherein at least the bottom surface of the high frequency absorption porous body is covered with a moisture impermeable film. 6. A heat-resistant porous body having the high-frequency absorption layer, at least a bottom surface of which is covered with a water-impermeable film.
The steam generator for high frequency heating described.