JPH08135980A - High-frequency heating device - Google Patents

Abstract

PURPOSE: To provide a high-frequency heating device, capable of effecting heating cooking wherein the evaporation of moisture in a food is eliminated and good finish can be obtained without drying the food. CONSTITUTION: A high-frequency generating means 33, projecting radiowave, and a steam vessel 43, provided between the high-frequency generating means 33 and a food 41 and equipped with a lid 45, are provided detachably in a heating chamber 31 while steam, generated by heating water in the steam vessel 43 through radiowaves, is discharged out of an opening unit 44 into the heating chamber to heat the food 41 by the steam and the radiowaves. Accordingly, the food is wrapped by steam of high humidity by limiting the ventilation of the steam injected from the steam vessel 42 into the heating chamber 31 to heat the food through radio wave heating and steam heating whereby the evaporation of moisture in the food can be prevented and heating with humid and nice finish can be effected efficiently without drying the food.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high frequency heating device for heating an object to be heated by radio waves.

[0002]

2. Description of the Related Art A conventional example will be described below with reference to FIGS.

FIG. 2 is a sectional view of a conventional high-frequency heating device. A waveguide 2 is connected to the upper part of the heating chamber 1, and a magnetron 3 which is a radio wave oscillating tube is provided in the waveguide 2. Radio waves from the magnetron 3 are radiated into the heating chamber 1 from the openings 4 through the waveguide 2, and the food 5 in the heating chamber 1 is heated at high frequency by the radio waves, and the food 5 is generated by the high frequency heating. In order to discharge the steam to the outside of the heating chamber 1, the structure is provided with an intake port 7 and an exhaust port 8 for ventilating the heating chamber 1 by using the wind of the cooling fan 6 for cooling the magnetron 3. It's just a heating device.

FIG. 3 is a cross-sectional view of a structure in which steam heating is performed by the high frequency heating device shown in FIG. A container A10 made of a low dielectric constant material is provided in the heating chamber 9. Water 11 is put in the bottom of the container A10, and a container B12 is provided on the container A10. A small hole 13 is provided on the bottom surface of the container B12. Container B12
The food 14 is placed on. The upper surface of the container B12 is covered with a lid 15 made of metal. The radio waves from the magnetron 16 are
Radio waves are sent from the opening 18 into the heating chamber 9 through the waveguide 17 to heat the water 11 in the container A10 in the heating chamber 9 by high frequency,
Generates steam. This steam enters the container B12 through the small hole 13 and heats the food 14 with steam.

FIG. 4 is a sectional view of another conventional high-frequency heating device. A waveguide 20 is connected to the upper portion of the heating chamber 19, and a magnetron 21 which is a high frequency generator is provided in the waveguide 20. Radio waves from the magnetron 21 are emitted from the opening 22 through the waveguide 20 into the heating chamber 19. A steam container 23 made of a low dielectric constant material is provided above the heating chamber 19. A lid 24 made of a low dielectric constant material is provided on the upper surface of the steam container 23 to seal the steam container 23. The steam opening 2 is provided at the center of the steam container 23.
5 are provided. Inside the steam container 23, water 26
Is intervening. With this configuration, the radio waves emitted into the heating chamber 19 first heat the water 26 in the steam container 23. The steam generated by this is discharged into the heating chamber 19 through the opening 25, so that the food 27 is heated by both the steam and the radio wave.

[0006]

However, in such a structure, first, in the conventional example shown in FIG. 2, considering that a large amount of water evaporates when high-moisture-heated food such as soup is heated by radio waves. It is configured to ventilate, and when food with low moisture is heated by radio frequency with high frequency, moisture evaporates from the food, the moisture of the food escapes and it becomes dry, so it becomes hard or dry. The delicious and moist finish could not be obtained. A method of wrapping the food in a plastic wrap and heating it is also implemented to remedy this drawback, but the amount of water in the plastic wrap is that the water content of the food is evaporating. Was not enough. In addition, it is not preferable to wrap the food with wrapping, because it is both troublesome and resource saving.

Further, in the conventional example shown in FIG. 3, since the food is heated by the steam, it is possible to prevent the water content of the food from evaporating. However, since the water is once heated by the radio wave and the steam generated thereby is heated, the efficiency is improved. Will become worse, and it will take longer to heat, and the feature of speed of radio wave heating will not be exhibited. Further, the food is taken in and out of the heating chamber together with the container A, the container B, the lid, and the water, which is heavy and difficult to handle.

Further, in the conventional example shown in FIG. 4, the steam required for heating the steam is exhausted to the outside of the heating chamber by ventilation, so that a large amount of steam is required for heating the steam, and a large amount of water is stored, which is treated as a heavy weight. It was difficult, and the steam was not stable due to the ventilation air, so the quality of the food was not always stable.

All of the conventional examples are not preferable because they have drawbacks such as the quality of cooking, heating efficiency, and difficulty in handling.

Therefore, the present invention is provided with a steam generator which is easy to handle and has a good cooking result by preventing the steam required for steam heating from being discharged to the outside of the heating chamber by the exhaust means in the configuration of FIG. It is intended to provide a high frequency heating device.

[0011]

[Means for Solving the Problems] That is, a heating chamber, a high-frequency generating unit coupled to irradiate radio waves to the heating chamber, a cooling fan for cooling the high-frequency generating unit, and a ventilation of the heating chamber by the wind of the cooling fan. A steam container with a lid made of a constant dielectric constant material is detachably housed between the high-frequency generating means and the object to be heated in the heating chamber. It consists of a steam container with a lid that is provided with water for generation, discharges the steam into the heating chamber from the opening provided in the lid or the steam container, and restricts the discharge of the steam in the heating chamber to the outside of the heating chamber by ventilation. The cooking is performed by high frequency and steam.

[0012]

The high frequency heating apparatus of the present invention heats the water in the steam container provided between the high frequency generating means and the food by radio waves to generate steam. The radio waves that have passed through the steam container and the steam that is generated irradiate the food, and heat the food with high frequency and steam. Since steam heats by both radio waves and steam while preventing evaporation of water in the food, the food can be cooked moistly and deliciously without drying the food. Since the radio waves are partially absorbed by the water in the steam container, they are emitted in a attenuated state, so the food is heated while suppressing a sharp rise in temperature, and the ventilation inside the heating chamber is restricted, so that the heating chamber is heated. When the steam is stabilized, the steam heats the food so as to wrap it, so that uniform heating can be achieved with less uneven heating.

Further, by restricting the ventilation of the heating chamber, the amount of the generated steam discharged to the outside of the heating chamber is reduced, the steam heating can be performed with the generation of a small amount of steam, and the amount of water stored in the steam container can be reduced. And the steam container is easy to handle.

Further, by removing the steam container, the ventilation is the same as the conventional one, and the performance can be exhibited as the conventional high-frequency heating device.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A high frequency heating apparatus according to an embodiment of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a sectional view of a high frequency heating apparatus according to an embodiment of the present invention. As shown in Figure 1,
A waveguide 32 is connected to the upper portion of the heating chamber 31. The waveguide 32 is provided with a magnetron 33 which is a high frequency generating means. A cooling fan 34 for cooling the magnetron 33 is provided, and an intake port 35 and an exhaust port 36 for ventilating the inside of the heating chamber 31 by the wind of the cooling fan 34 are provided. The electromagnetic wave from the magnetron 33 is guided by the waveguide 32. Opening 3 through
Irradiation from 7 into the heating chamber 31. The electric wave agitating blade 38 is rotationally driven by the motor 39 to evenly agitate the electric wave in the heating chamber 31. A partition plate 40 made of a low dielectric constant material is provided above the heating chamber 31. A food 41, which is an object to be heated, is placed on the bottom of the heating chamber 31. Radio wave irradiation part and food 41
In a place corresponding to the space, that is, in the present embodiment, a steam container 42 formed of a low dielectric constant material is detachably provided in the lower part of the partition plate 40 in the upper part of the heating chamber. An opening 43 formed by a large number of small holes is provided on the lower surface of the center of the steam container 42. A lid 44 made of a low dielectric constant material is provided on the upper surface of the steam container 42 to seal the steam container 42. Water 45 is provided inside the steam container 42. With this configuration, when the radio wave from the magnetron 33 is applied to the heating chamber 31, the water 45 in the steam container 42 is heated at high frequency.
As a result, the water 45 is heated to become steam, and the steam container 42
It is discharged into the heating chamber 31 through the opening 43. By changing the flow of ventilation in the steam container 42 so that the steam in the heating chamber 31 is not discharged to the outside of the heating chamber 31 by ventilation, the inside of the heating chamber 31 becomes a very high humidity state and food By wrapping around 41 with stable steam,
The food 41 is steam-heated by the steam, and the radio wave from the magnetron 33 heats the water 45 in the steam container 42 as described above, while the remaining radio wave passes through the water 45 and is irradiated to the food 41, and the food 41 is irradiated with high frequency. To heat. In this way, the food 41
In a high humidity environment inside the heating chamber 31, radio wave heating and steam heating are performed at the same time.

[0017]

As described above, according to the high frequency heating apparatus of the present invention, the following effects can be obtained.

(1) Since the steam in the heating chamber is generated by heating the water in the steam container by radio wave, the inside of the heating chamber becomes a very high humidity atmosphere. When the food is radio-wave heated in this state, the amount of water that evaporates from the food is balanced with the vapor that tries to enter the food, and the water inside the food does not move. As a result, even if the food is heated, it is possible to prevent the water in the food from evaporating and decreasing, and the food does not become dry, hard, or dry, and delicious.
A moist finish will be obtained.

(2) Since the radio waves are partially absorbed by the water in the steam container, the radio waves are irradiated in a attenuated state, so that the food is heated while suppressing a rapid temperature rise, and the steam heats the food so as to wrap it. As a result, uniform heating can be performed without unevenness, and good heating can be achieved from this aspect.

(3) It is no longer necessary to wrap the food in a wrap in order to reduce the evaporation of water in the food as in the conventional case, and it is possible to save extra time during cooking.
It can be cooked easily and easily. It is also preferable from the viewpoint of resource saving that it is not necessary to use consumable items such as wraps.

(4) Compared with the conventional structure in which water is heated by radio waves to convert most of the energy into steam and the food is heated by steam, the present invention heats by both radio wave heating and steam heating. It is possible to efficiently heat and cook in a short time without impairing the speed of heating.

(5) By removing the steam container, the ventilation is the same as the conventional one, and the performance can be exhibited as the conventional high-frequency heating device.

As described above, according to the present invention, it is possible to provide a high-frequency heating device having a simple structure, excellent cooking performance, economical, and easy to use.

[Brief description of drawings]

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

FIG. 2 is a sectional view of a conventional high-frequency heating device.

FIG. 3 is a sectional view of another conventional high-frequency heating device.

FIG. 4 is a sectional view of another conventional high-frequency heating device.

[Explanation of symbols]

 31 heating chamber 33 magnetron (high-frequency generator) 40 partition plate 41 food 43 steam container 44 opening 45 lid

Claims (1)

[Claims] 1. A heating chamber, a high-frequency generating unit coupled to the heating chamber so as to radiate radio waves, a cooling fan for cooling the high-frequency generating unit, and ventilation of the heating chamber by the wind of the cooling fan. An intake port and an exhaust port are provided, and a steam container with a lid formed of a low dielectric constant material between the high-frequency generating means and the object to be heated is detachably accommodated in the heating chamber, Is a cover provided with water for generating steam, the steam being discharged into the heating chamber from an opening provided in the cover or the steam container, and the discharge of the steam to the outside of the heating chamber by ventilation of the heating chamber is restricted. A high-frequency heating device that consists of a steam container with a heater and that heats by high-frequency and steam.