JP2001355844A - Cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooker in which vapor is effectively generated, and it is not allowed to escape to the outside. SOLUTION: The cooker includes an evaporation vessel 16 which is formed of a material of low dielectric constant, and placed removably at an outlet 15 of a wave guide 14 for guiding a microwave into the oven chamber 11. In the cooker there are further included a fan 17 for circulating air in the chamber 11, and a heater 18a for heating the wall of the oven chamber 11. Water in the vessel 16 is evaporated to generate water vapor by dielectric heating by a microwave, the water vapor is heated by the heater 18a into superheated steam, and the rotation shaft of an agitation fan of the fan 17 is electromagnetically coupled. Accordingly, the steam does not escape at the rotation shaft to the outside of the chamber, and the steam can be used without waste.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooking device for cooking food to be cooked in an oven using superheated steam, which is steam exceeding 100.degree.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication No. Hei 8-49854 discloses a heating cooker utilizing superheated steam. As shown in FIG. 7, an evaporating section 2 for evaporating water is provided at the bottom of an oven chamber 1, and the evaporating section 2 is heated by an induction heating coil 3 to generate saturated steam, and infrared rays are emitted from the oven chamber 1. The saturated steam is further heated by the infrared ray generating means 4 radiating into the inside to produce superheated steam, and by using the superheated steam as a heat medium, the heat transfer rate from air to food is increased and the cooking time can be reduced. It is.

[0003] Japanese Patent Application Laid-Open No. 8-128649 has disclosed a cooking device for heating food by steam and radio waves. As shown in FIG. 8, this is a steam container 8 with a lid detachably provided between the high-frequency generating means 6 and the food 7 in the heating chamber 5 by the high-frequency generating means 6 for irradiating the heating chamber 5 with radio waves. The water inside is heated by radio waves, the generated steam is released into the heating chamber 5 from the opening 9, and the food is wrapped in a high-humidity atmosphere. The radio wave heating and the steam heating prevent the moisture of the food from evaporating. The moist finish is heated.

[0004]

However, in the above-mentioned conventional configuration, the heating cooker shown in FIG. 7 has an induction heating coil 3 for heating the bottom of the oven storage 1 and an infrared generating means 4 for heating the inside of the oven storage 1. In addition, it becomes necessary and expensive, and when the water evaporates, mineral components such as calcium dissolved in the water remain white at the bottom of the oven storage 1 as scale, and cleaning of the oven storage 1 is difficult. Also,
The cooking device shown in FIG. 8 is easy to clean up because the steam container 8 can be removed. However, since steam generated at 100 ° C. is not reheated, cooking with superheated steam cannot be performed, and steam condenses on the oven wall. As a result, there is a problem in that dew condensation water accumulates in the refrigerator, and light steam escapes from the upper fan rotation shaft gap.

[0005] Therefore, the present invention has an inexpensive structure, makes it easy to clean the scale and clean up the dew condensation water in the oven chamber.
An object of the present invention is to provide a heating and cooking apparatus that cooks food to be cooked in an oven with superheated steam, which is steam exceeding 00 ° C., generates steam effectively, uses the steam without escape, and easily handles a steam generating container.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an oven storage for storing food to be cooked, high-frequency generation means for irradiating microwaves into the oven storage, and an oven storage for microwaves. An evaporating container formed of a low-dielectric-constant material detachably provided at the outlet of the waveguide leading to the inside, a blower for circulating the air in the oven, and a heater for heating the oven wall, comprising a microwave. The water in the evaporation container is evaporated by the dielectric heating to generate steam, the steam is heated by the heater to be superheated steam, and the shaft of the stirring fan of the blower is magnetically coupled.

[0007] This prevents steam from leaking out of the refrigerator from the rotating shaft of the blower, so that the steam generated from the steam container can be used without waste.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention described in claim 1 is an oven storage for storing food to be cooked, high-frequency generating means for irradiating microwaves into the oven storage, and a guide for guiding microwaves into the oven storage. It consists of an evaporating container molded of a low dielectric constant material detachably provided at the outlet of the wave tube, a blower that circulates air in the oven, and a heater that heats the oven wall. The water in the evaporation container is evaporated to generate steam, the steam is heated by the heater to be superheated steam, and the shaft of the stirring fan of the blower is magnetically coupled. Since it does not leak out of the refrigerator, the steam generated from the steam container can be used without waste.

According to a second aspect of the present invention, there is provided an oven storage for storing food to be cooked, high-frequency generating means for irradiating microwaves into the oven storage, and an outlet of a waveguide for guiding microwaves into the oven storage. An evaporating container formed of a low dielectric constant material detachably provided on the evaporating container, a blower for circulating air in the oven container, and a heater for heating the oven container wall, and the inside of the evaporating container is heated by microwave dielectric heating. Evaporating water to generate steam, heating the steam by the heater to produce superheated steam, using a stirring fan provided in the oven cabinet as a rotor, providing a stator outside the oven cabinet, and using the blower as an axial gap motor. The steam is prevented from leaking out of the refrigerator from the rotating shaft of the blower, so the steam generated from the steam container can be used without waste. Come, and thinly constituting the motor of the blower, it is possible to reduce the installation space.

According to a third aspect of the present invention, a plurality of small projections are provided inside the evaporating container, and the structure is such that boiling nuclei are easily formed, so that water in the steam container is boiled by microwaves. It is possible to prevent bumping, which is likely to occur when performing this.

According to a fourth aspect of the present invention, a removable sintered ceramic material is provided inside an evaporating vessel, and a material which easily forms a core of boiling is introduced by microwave. It is possible to prevent bumping, which is likely to occur when boiling water inside the steam container.

The invention described in claim 5 is configured such that one surface of the oven storage wall is depressed, and a substantially rectangular parallelepiped evaporation container having an upper surface opened in the depression is attached. It can be easy to use.

According to a sixth aspect of the present invention, a handle portion made of the same material is provided in a part of the evaporating container. By using the same low dielectric constant material, it is not heated by microwaves and does not become hot. Therefore, it can be easily used.

According to the invention described in claim 7, the evaporating container is attached to the oven wall by magnet connection, so that the handling operation can be further simplified.

[0015]

[Example] Superheated steam cooking is a method of cooking food to be cooked by filling superheated steam, which is water vapor exceeding 100 ° C., in an oven, and condensed water is generated on the food surface when the food temperature is low. The food surface can be rapidly heated by the latent heat of water vapor, and the condensed water can be cooked without drying while giving moisture to the food. In addition, since steam has a higher specific heat than air, heat transfer to food is better with steam. Further, with superheated steam at a so-called reversal point of about 180 ° C. or more, the food surface can be dried faster than air.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1) FIG. 1 is a view showing the configuration of a heating cooking apparatus according to Embodiment 1 of the present invention. FIG. 2 is a side sectional view of the cooking device. Reference numeral 10 denotes a heating cooking device of the present invention. Reference numeral 11 denotes an oven storage for storing the food to be cooked 12, and reference numeral 13 denotes a high-frequency generation unit that irradiates microwaves into the oven storage 11. An evaporating vessel 16 made of a low dielectric constant material is removably installed at an outlet 15 of a waveguide 14 for guiding microwaves into an oven chamber, and water in the evaporating vessel 16 is evaporated by microwave heating to vaporize water. Generate. Blower 1 for circulating air in oven chamber 11
7, heaters 18a, 1 for heating the walls of the oven chamber 11;
8b and 18c are provided, an air vent hole 19 is provided below the oven chamber 11, and a temperature sensor 20 is provided in the air vent hole 19. The blower 17 is coupled by a magnet 21 and driven by a motor 22.

With this configuration, a cooking device using superheated steam can be configured at low cost without adding a very large configuration to a heating cooker in which a microwave oven and an oven function are widely integrated under the name of a microwave oven in general households. can do. First, the walls of the oven chamber 11 and the air in the chamber are preheated by the heaters 18a, 18b, 18c and the blower 17. If the wall of the oven chamber 11 is kept at 100 ° C. or higher, water is always present as a gas when the temperature exceeds 100 ° C. at 1 atm. Therefore, even if steam is generated in the chamber, dew forms on the wall of the oven chamber 11. Can be prevented, and there is no need to install a dew-water receiver.

When the inside of the refrigerator is preheated to the target cooking temperature, the food to be cooked 12 is put in, and the water in the evaporation container 16 is boiled by the high frequency generating means 13 to generate steam. Since the evaporation container 16 is formed of a low dielectric constant material, the evaporation container 1
6 itself is not heated by the microwave, and only the water inside is heated by the microwave. Therefore, even if the heating efficiency is good and the amount of water is reduced, there is no fear that the evaporating container 16 will be over-baked due to the emptying of the evaporation container 16. By installing the evaporation container 16 at the exit 15 of the waveguide in the oven chamber 11, the food 12 to be cooked and the evaporation container 16
Despite the fact that both waters are in the oven chamber 11,
Only the water in the evaporation container 16 can be selectively microwave-heated. By making the evaporating container 16 detachable, cleaning is easy even if mineral components such as calcium dissolved in water remain in the evaporating container 16 as scale.

When water is turned into steam, the volume increases by about 1700 times. The oven chamber 11 itself has a structure in which a gap is eliminated so that water vapor does not leak, and a packing (not shown) is provided on the door to close the gap. In order to prevent leakage of water vapor from the rotating shaft of the blower 17, the blower 17 and a driving motor 22 provided outside the refrigerator are coupled by a pair of magnets 21 provided on both sides to eliminate a gap between the rotating shafts.

Here, by providing the air vent hole 19 below the oven chamber 11, water vapor having a specific gravity lower than that of the air is accumulated above the oven chamber 11, and the air vent hole 1 below the oven chamber 11 is provided.
From 9 the air is expelled. The ejection of steam from the air vent hole 19 indicates that the inside of the oven chamber 11 has been filled with steam. A temperature sensor 20 is provided in the air vent hole 19, and when the temperature rises due to the passage of water vapor through the air vent hole 19, the microwave output is reduced to reduce the amount of generated steam, and the steam ejected to the outside of the oven chamber 11. Reduce volume and prevent wasted power and water use.

A blower 17 and a heater 18 for circulating 100 ° C. steam generated in the oven
In a, 18b, and 18c, the temperature is further increased to produce superheated steam, and the food 12 is wrapped and cooked. 100 to 110
At about 200 ° C, steamed dishes can be cooked.

(Embodiment 2) FIG. 3 is a view showing the configuration of a heating cooking apparatus according to Embodiment 2 of the present invention. The same components as those in FIG. 1 are given the same numbers. Rotor 24 constituting blower 17
And a stator 23 provided outside the refrigerator to form an axial gap type motor, and a portion protruding outside the refrigerator is formed to be thin, thereby improving installability. Also in this configuration, since there is no gap due to the rotating shaft, there is no steam leakage, and effective use of steam can be achieved.

(Embodiment 3) FIG. 4 is a diagram showing the configuration of a heating cooking apparatus according to Embodiment 3 of the present invention. A plurality of small projections 25 were formed inside the steam container 16. Since the small projections 25 form nuclei at the time of boiling and air bubbles are easily generated, when the water inside is heated by the microwave, the bumping phenomenon that occurs immediately before the boiling can be prevented. Thereby, steam can be generated safely and effectively without the water inside spilling out.

(Embodiment 4) FIG. 5 is a view showing the configuration of a heating cooking apparatus according to Embodiment 4 of the present invention. A sintered sintered ceramic material 26 was detachably provided inside the steam container 16, and a handle 27 using a low dielectric constant material, which is the same material as the evaporation container 16, was provided.

Since the nucleus at the time of boiling is formed by the foamed portion of the foamed sintered ceramic material 26 and bubbles are easily formed,
When the water inside is heated by microwaves, bumping phenomenon that occurs just before boiling can be prevented. Thereby, steam can be generated safely and effectively without the water inside spilling out. The handle 27 is made of the same material and is easy to manufacture, and since it is a low dielectric material, it is not heated by microwaves, so it is not heated and easy to handle.

(Embodiment 5) FIG. 6 is a view showing the configuration of a heating cooking apparatus according to Embodiment 5 of the present invention. The same components as those in FIG. 1 are given the same numbers. Magnet 2 on one side of evaporation vessel 16
8 and is configured to be detachably attached to the storage wall. Since it is a magnet system, it is very easy to handle. In the case of using a non-magnetic storage wall, it is needless to say that another magnet may be provided outside the storage wall.

[0028]

According to the first aspect of the present invention, since the steam does not leak out of the refrigerator from the rotating shaft of the blower, the steam generated from the steam container can be used without waste.

According to the second aspect of the present invention, steam does not leak out of the refrigerator from the rotating shaft of the blower.
The steam generated from the steam container can be used without waste,
It is possible to reduce the installation space by making the motor of the blower thin.

According to the third aspect of the present invention, by employing a structure in which a nucleus of boiling is easily formed, bumping, which is likely to occur when water in a steam container is boiled by microwaves, can be prevented.

According to the fourth aspect of the present invention, by introducing a substance that easily forms a nucleus of boiling, it is possible to prevent bumping, which is likely to occur when water in a steam container is boiled by microwaves. it can.

According to the fifth aspect of the present invention, since the inside of the oven storage is widened, it is easy to use.

According to the sixth aspect of the present invention, since the same low dielectric constant material is used, it is not heated by microwaves and does not become hot, so that it is easy to use.

According to the invention described in claim 7, the handling operation can be made easier.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a heating cooking device according to a first embodiment of the present invention.

FIG. 2 is a side sectional view of the cooking device.

FIG. 3 is a configuration diagram of a heating cooking device according to a second embodiment of the present invention.

FIG. 4 is a configuration diagram of a heating cooking device according to a third embodiment of the present invention.

FIG. 5 is a configuration diagram of a heating cooking device according to a fourth embodiment of the present invention.

FIG. 6 is a configuration diagram of a heating cooking device according to a fifth embodiment of the present invention.

FIG. 7 is a configuration diagram of a conventional heating cooker.

FIG. 8 is a configuration diagram of another conventional heating cooker.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Heat-cooking apparatus 11 Oven storage 13 High-frequency generation means 14 Waveguide 15 Waveguide outlet 16 Evaporation container 17 Blower 18a Heater 18b Heater 18c Heater 19 Air vent hole 20 Temperature sensor 21 Magnet 23 Stator 24 Rotor 25 Small protrusion 26 Foaming Ceramic material 27 Handle 28 Magnet

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H05B 6/70 H05B 6/70 E (72) Inventor Hideki Omori 1006 Odakadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial F term in the company (reference) 3K090 AA02 AA03 AA11 AB02 BA01 BA09 BB01 BB14 CA02 EB17 EB23 EB29 FA06 FA07 3L086 AA02 AA07 BA10 BD01 BF02 BF04 BF06 BF09 DA03 DA04 DA06 DA19 DA24 4B055 AA10 BA02 DB22 BA38 FB32 FC09 FC17 GA04 GC14

Claims (7)

[Claims] 1. An oven for storing food to be cooked, high-frequency generating means for irradiating microwaves in the oven, and a low-frequency power source detachably provided at an outlet of a waveguide for guiding microwaves into the oven. An evaporation container molded from a dielectric material, a blower that circulates air in the oven, and a heater that heats the oven wall, evaporates water in the evaporation container by microwave dielectric heating to produce steam. And a steamer is heated by the heater to produce superheated steam, and a shaft of a stirring fan of the blower is magnetically coupled. 2. An oven storage for storing food to be cooked, high frequency generating means for irradiating microwaves into the oven storage, and a low-frequency power supply detachably provided at an outlet of a waveguide for guiding the microwaves into the oven storage. An evaporation container molded from a dielectric material, a blower that circulates air in the oven, and a heater that heats the oven wall, evaporates water in the evaporation container by microwave dielectric heating to produce steam. The heating and cooking apparatus wherein the steam is heated by the heater to generate superheated steam, the stirring fan provided in the oven storage is used as a rotor, a stator is provided outside the oven storage, and the blower is configured as an axial gap motor. 3. The cooking device according to claim 1, wherein a plurality of small projections are provided inside the evaporation container. 4. The heating cooking device according to claim 1, wherein a removable sintered ceramic material is provided inside the evaporating container. 5. The heating and cooking apparatus according to claim 1, wherein one surface of the oven storage wall is depressed, and a substantially rectangular parallelepiped evaporation container having an open upper surface is attached to the depression. 6. The cooking device according to claim 1, wherein a handle made of the same material is provided in a part of the evaporation container. 7. The cooking device according to claim 1, wherein the evaporating container is attached to an oven wall by magnet coupling.