JP4978541B2 - Cooking equipment - Google Patents

Description

  The present invention relates to a cooking device for heating an object to be heated by radio wave heating, grill heating or oven heating.

  The microwave oven, which is a heating device that can be cooked with typical radio waves, hot air, or steam, can heat food that is to be heated with a single heating device, so there is no need to prepare a pan, kettle, steamer, etc. It has become an indispensable device in daily life.

In addition, the oven microwave oven is configured to uniformly heat the food with the steam generated by the humidifier while heating it with a heater or the like. After giving salt and oil with water condensed on the food surface and heating with a planar heater such as mica or a light lamp heater, the surface was warmed to enable healthy cooking (for example, Patent Document 1) reference).
Japanese Patent No. 2897645

  However, the configuration of the conventional heating cooking apparatus shown in FIG. 8 includes an oven cabinet 2 for storing the object to be heated 1 during cooking, an evaporating dish 3 and steam generating means 4 for heating water into steam, and 2.5 μm. The infrared ray generating means 5 that radiates into the oven cabinet 2 centering on the infrared ray having one wavelength existing in the range of 3 μm or less as described above, and the guard shape for protecting the infrared ray generating means 5 is not clarified.

  According to the above configuration, a sufficient amount of water vapor can be supplied and heated in the oven cabinet 2, the oven cabinet 2 is filled with superheated steam, the superheated steam is condensed on the food surface and covered with condensed water, Deoiling and low salt cooking can be performed. At this time, if microwaves can be applied to the oven cabinet 2, the infrared ray generating means 5 formed of a quartz tube or the like is filled with an inert gas such as argon gas, and the filament present inside However, there is a problem that electric discharge is caused by electric field concentration due to radio wave heating and abnormal light emission occurs.

  Furthermore, in the case of a Hanamaki type lamp in which the filament is in direct contact with the inner surface of the quartz tube, the composition of the tube surface is modified to cristobalite, causing a devitrification phenomenon that becomes white and cloudy.

  Furthermore, in order to withstand high-temperature filaments, since the tube is formed of a glass material such as a quartz tube, it is necessary to protect the tube from physical impact, and a guard must be provided. At this time, when a guard is provided inside the oven cabinet 2, depending on the position and interval of the mounting feet, the filament existing inside causes discharge due to electric field concentration due to radio wave heating and abnormal light emission, as described above. If the guard is attached to the reflector with a dissimilar metal, there is a problem that electrolytic corrosion occurs.

  The present invention solves the above-described conventional problems by protecting the infrared ray generating means from physical impact and preventing abnormal emission of the infrared ray generating means by microwaves and radiating infrared rays that are not easily absorbed by water vapor. An object of the present invention is to provide a cooking device capable of quickly and uniformly heating the inside of a food to make the food surface crisp.

In order to solve the above-described conventional problems, a heating cooking apparatus according to the present invention heats the heated object by generating a microwave and supplying the heated object to the heated room in which the heated object is stored during cooking. Microwave generation means and an infrared generation means provided in the upper part of the heating chamber and formed of a quartz tube, in which an inert gas is sealed inside the quartz tube and generating infrared rays, and so as to sandwich the quartz tube. A quartz tube guard for protecting the quartz tube and a reflecting plate formed on the top surface of the heating chamber, wherein the quartz tube guard is formed of the same material as the reflecting plate and is attached at both ends. Attached to the reflection plate with feet, and attached at two places where the interval between the attachment feet of the same quartz tube guard among the quartz tube guards is the wavelength λ of the microwave generated from the microwave generating means, Quartz Interval of the guard each other has a configuration is about 25mm.

As a result, the infrared generating means can be prevented from cracking due to an external physical shock, the abnormal light emission due to microwaves in the infrared generating means existing in the heating chamber can be prevented, and the quartz composition on the quartz tube surface can be reduced to cristobalite. The devitrification phenomenon which denatures and becomes white turbid can be suppressed. Furthermore, the food surface can be given a crisp feeling by directly radiantly heating the inside of the food with infrared rays.

  According to the cooking device of the present invention, the infrared generating means can be prevented from cracking due to an external physical impact, the abnormal light emission due to microwaves of the infrared generating means existing in the heating chamber is prevented, and the quartz tube surface The devitrification phenomenon in which the quartz composition is modified into cristobalite and white and cloudy can be suppressed. Furthermore, the food surface can be given a crisp feeling by directly radiantly heating the inside of the food with infrared rays. Further, since the heating source is present in the heating chamber, the temperature rise rate is very fast, so that efficient heating can be performed. That is, a cooking device with excellent energy saving performance can be provided.

Cooking apparatus of the first aspect of the invention includes a heating chamber for accommodating the object to be heated during cooking, and microwave generating means for heating the object to be heated is supplied to the heating chamber to generate a microwave, the heating An upper part of the chamber is formed of a quartz tube, and an inert gas is sealed inside the quartz tube, and the infrared ray generating means for generating infrared rays and the quartz tube are arranged in parallel to protect the quartz tube. And a reflecting plate formed on the top surface of the heating chamber. The quartz tube guard is made of the same material as the reflecting plate and is attached to the reflecting plate with mounting feet at both ends. The quartz tube guards are attached at two locations where the interval between the mounting feet of the same quartz tube guard is the wavelength λ of the microwave generated from the microwave generating means, and the interval between the quartz tube guards is About 25m It has a configuration of the order.

As a result, the infrared generating means can be prevented from cracking due to an external physical shock, the abnormal light emission due to microwaves in the infrared generating means existing in the heating chamber can be prevented, and the quartz composition on the quartz tube surface can be reduced to cristobalite. The devitrification phenomenon which denatures and becomes white turbid can be suppressed. Moreover, the electrolytic corrosion of the junction part of a reflecting plate and a mounting foot part can be prevented. Furthermore, the food surface can be given a crisp feeling by directly radiantly heating the inside of the food with infrared rays .

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited by this embodiment.

(Embodiment 1)
1 and 2 are block diagrams of an oven microwave oven that is a typical cooking device according to claims 1 to 3, FIG. 1 is a cross-sectional view as viewed from the side of the interior, and FIG. 2 is a view from the front of the interior. FIG. 3 to FIG. 6 are configuration diagrams of infrared generation means. Further, FIG. 7 is a graph showing the ratio of absorbing water vapor to the wavelength of light (from Nobuhiro Seki, Heat Transfer Engineering, Morikita Publishing Co., Ltd., 1988.5.20, P178, FIG. 6.21).

  The present embodiment is an oven microwave oven that uses a method of rotating two antennas, and is representative of supplying microwaves from below the mounting table 12 on which the food 11 that is a heated object is placed. 2 is an example in which a magnetron 13 which is a microwave generating means is provided on the right side in FIG. 2, a waveguide 15 for guiding the microwave generated from the magnetron 13 into the heating chamber 14, and a rotating antenna for generating radio waves to the heating chamber 14. Two 16 are provided.

In particular, the present embodiment includes a single lamp heater 17 that is an infrared ray generating means, and a far infrared ray generating means that is arranged substantially in parallel on both sides of the lamp heater 17 so as to sandwich the lamp heater 17 therebetween. Two certain miraclon heaters 18 are arranged. The lamp heater 17
A quartz tube 19 for forming the quartz tube 19 and a quartz tube guard 20 for protecting the quartz tube 19 from physical impact are attached to the top surface of the heating chamber 14. Further, a control means 21 is provided for driving the magnetron 13 and controlling energization by turning on and off the lamp heater 17 and the miraclon heater 18.

  The lamp heater 17 includes an argon gas 22 that is an inert gas inside a quartz tube 19 and a tungsten wire 23 that is a light-emitting body mainly in a coil shape. Support rings 24 that hold the coiled tungsten wire 23 so as not to contact the inside of the quartz tube 19 by its own weight are provided at equal pitch intervals.

  As shown in FIG. 3, the quartz tube guard 20 is attached to the reflection plate 26 with attachment legs 25 on both ends of the quartz tube guard 20. Further, as shown in FIG. 1, the quartz tube guard 20 is disposed substantially in parallel with an interval of about 25 mm so as to sandwich the lamp heater 17 and the miraclon heater 18, and is formed of the same material as the reflector 26. . The quartz tube guard 20 is attached at two locations where the longitudinal interval of the mounting legs 25 is the wavelength λ of the radio wave generated from the microwave generating means 13 (four times the wave line λ / 4 shown in the figure). It is configured.

  Further, the lamp heater 17 radiates infrared rays having a wavelength that is difficult to be absorbed by water vapor generated from the food itself, transmits the water vapor present in the heating chamber 14, reaches the food 11, and performs cooking. The wavelength of infrared rays generated from the lamp heater 17 has a peak at 1.5 μm or more and 1.8 μm or less, which is the wavelength in the region where the water vapor absorption rate is low as shown in FIG. 7, and the Miraclone heater 18 has a wavelength longer than about 3 μm. The configuration has a peak in the region.

  As a result, the attachment legs 25 of the quartz tube guard 20 are provided at positions where the electric field strength is weak, in which the distance between the attachment legs 25 in the longitudinal direction is the wavelength λ of the radio wave generated from the microwave generation means 13. In addition, since the quartz tube guard 20 has a spacing of about 25 mm to the reflection plate 26 with the mounting legs 25 on both sides, if the frequency of the microwave is 2450 MHz, for example, the wavelength λ is about 122 mm, that is, λ / 4. Since it deviates from a certain 30.5 mm, abnormal light emission at the support ring 23 can be prevented.

  In addition, since the infrared rays are radiated to the heating chamber 14 from one lamp heater 17 that transmits water vapor, the food 11 placed in the heating chamber 14 can be directly and uniformly heated, and the infrared rays are applied to the surface of the food 11. Directly radiated, the temperature is quickly transmitted to the inside of the food, and when far-infrared rays are radiated from the two miraclon heaters 18 arranged in parallel on both sides of the lamp heater 17, the surface of the food 11 is finished crisply, and the burnt eyes Can be quickly attached. And the electrolytic corrosion by joining of the reflecting plate 26 and the attachment leg 25 can also be prevented.

  As described above, in the present embodiment, the configuration in which the mounting feet 25 are attached to the reflecting plate 26 with two ends, but the configuration in which the mounting feet 25 are attached to the reflecting plate 26 at the center and both ends as shown in FIG. However, since it is not located at ¼ of the wavelength λ, the same effect can be exhibited. Furthermore, as shown in FIG. 5, even if the four attachment legs 25 are attached to the reflecting plate 26, they are not located at a quarter of the wavelength λ, so that the same effect can be exhibited. Further, as shown in FIG. 6, even if the five mounting legs 25 are attached to the reflecting plate 26, the same effect can be exhibited because it is not located at ¼ of the wavelength λ.

  In addition, although the configuration is such that the two antennas 6 are rotated to radiate microwaves, the same effect can also be achieved with a configuration in which one antenna 6 is rotated to radiate microwaves. Moreover, even if it is the structure which does not generate | occur | produce a microwave, the same effect can be exhibited regarding the heating effect by the infrared rays of the lamp heater 17 from the top, and the far infrared rays of the miraclon heater 18 from the top.

  Further, the lamp heater 17 has a wavelength having a peak at 1.5 μm or more and 1.8 μm or less, but the lamp emits a wavelength of 2.0 μm or more and 2.3 μm or less, or 3.4 μm or more and 4.5 μm or less. The heater 16 can exhibit the same effect.

  Further, the case where one lamp heater 17 and two miraclon heaters 18 are used has been described. However, the same effect can be obtained when two or more lamp heaters 17 and three or more miraclon heaters 18 are used. It can be demonstrated.

  As described above, according to the present invention, it is possible to uniformly heat the object to be heated by radiating infrared and far-infrared wavelengths that transmit water vapor, so that a microwave oven and oven as a cooking utensil using microwaves It can be applied to heating, thawing devices for various ranges, dielectrics, heating devices in industrial fields such as drying devices, ceramics heating, sintering or biochemical reactions.

The cross-section block diagram which looked at the heat cooking apparatus of Embodiment 1 of this invention from the side surface Cross-sectional configuration diagram seen from the front of the cooking device Configuration diagram of quartz tube guard of the cooking device Another block diagram of the quartz tube guard Another block diagram of the quartz tube guard Another block diagram of the quartz tube guard The figure showing the absorption rate of water vapor with respect to light wavelength Sectional view seen from the side of a conventional cooking device

11 Heated object 13 Microwave generating means 14 Heating chamber 17 Infrared generating means 19 Quartz tube 20 Quartz tube guard 22 Inert gas 25 Mounting foot 26 Reflector

Claims (1)

A heating chamber for storing an object to be heated during cooking,
Microwave generation means for generating microwaves and supplying the heated chamber to heat the object to be heated;
Infrared generating means that is provided in the upper part of the heating chamber, is formed of a quartz tube, an inert gas is sealed inside the quartz tube, and generates infrared rays ;
A quartz tube guard for protecting the quartz tube arranged side by side so as to sandwich the quartz tube;
Comprising a reflector formed on the top surface of the heating chamber;
The quartz tube guard is formed of the same material as the reflector and is attached to the reflector with attachment feet at both ends, and the interval between the attachment feet of the same quartz tube guard among the quartz tube guards is A cooking apparatus, which is attached at two places where the wavelength λ of the microwave generated from the microwave generating means is set, and the interval between the quartz tube guards is about 25 mm .