JP5456076B2 - High frequency heating device - Google Patents

Description

The present invention relates to a high-frequency heating apparatus including a high-frequency heating tray on which an object to be heated is placed.

  In the prior art, for example, there has been proposed a high-frequency heating device appliance in which a metal tray is installed on a high-frequency heating element and the high-frequency heating element and the tray are bonded (see, for example, Patent Document 1). .

JP 2006-52932 A

  In the conventional appliance for high-frequency heating equipment such as the above-mentioned Patent Document 1, a heating material bonded to the back side of the saucer is irradiated with a high frequency (hereinafter also referred to as microwave) to generate heat, and the heat conduction is the surface of the saucer. The food is burned by increasing the temperature of the food placement surface.

However, when using the saucer of Patent Document 1, the heating element always generates heat at the time of microwave heating, so it cannot cope with various cooking, and the usability is very bad.
For example, when food as an object to be heated is put in a container having a low heat-resistant temperature, and the container is placed on a saucer and heated by microwaves, the container may melt due to heat conduction from the saucer. In addition, it is impossible to heat food in a container having a low heat-resistant temperature. Therefore, as a manufacturer, it is necessary to provide a tray, a net, or the like that does not have a heat generation function as an accessory, and there is a problem that the number of parts and cost increase.

Furthermore, since a tray with a heating element on the back surface may be placed in a kitchen or a table in a high temperature state, if it is placed on a member with a low heat resistance, the heat generated by the heating element There is also a possibility of causing a problem such as discoloration or deformation of the member.
Moreover, since the back surface of the tray is always exposed to an impact during installation, the heating element is likely to be scratched and the possibility of deterioration is higher than the surface.

  Furthermore, considering the case where the saucer is made of metal as in the technique of Patent Document 1, a metal having conductivity when irradiated with microwaves has a property of reflecting the microwaves. For this reason, for example, when it is desired to add scorch but also to directly heat the food itself with microwaves, both microwaves are applied to both the surface of the saucer on which the food is placed and the back surface of the saucer provided with a heating element. Need to be irradiated. For this reason, it is necessary to provide a plurality of microwave irradiation sources, the structure becomes complicated, and there is a problem that the size is increased and the cost is increased.

In recent microwave ovens and microwave ovens, microwaves are often irradiated from one direction below the food. In such a high-frequency heating apparatus that irradiates microwaves from one direction of food, even if the heating element on the back side of the saucer is sufficiently heated, the food on the front side itself is placed in a metal square dish. There is a problem that the food is not sufficiently heated by microwaves because it becomes a partition with the upper space.
Furthermore, in the case of a metal saucer, there is a possibility that microwaves locally concentrate and cause sparks in the part where burrs remain at the end of the saucer or the part where the distance between the end of the saucer and the wall surface of the heating chamber is short. is there. For this reason, it is desirable not to use a metal saucer for microwave heating as much as possible.

The present invention has been made in order to solve the above-described problems, and can be selected from cooking that performs heating by heat conduction together with high-frequency heating (dielectric heating) and cooking that performs only high-frequency heating, thereby improving usability. it is intended to obtain a high-frequency heating apparatus that can be.
Moreover, the high frequency heating apparatus provided with the tray for high frequency heating which can prevent troubles, such as reduction of the high temperature discomfort at the time of conveyance and discoloration of an installation location, is obtained.
Moreover, simultaneous heating of the high-frequency heating and the heater heating, relay heating (different heat source order heating), it is possible to alternately heat, so as to obtain a high-frequency heating apparatus that can enable both the browning and internal heating is there.
Also, it is to obtain a high-frequency heating apparatus that can reduce the spark occurrence probability of high frequency.

A high-frequency heating device according to the present invention includes a heating chamber that houses an object to be heated, a high-frequency oscillator that oscillates a high frequency, and a waveguide that is connected to the heating chamber and guides the high-frequency oscillated from the high-frequency oscillator to the heating chamber. A tube, a mounting table that is installed in the heating chamber and made of a material that transmits high frequency, a high-frequency heating tray that is installed in the heating chamber and on which the object to be heated is mounted, and a wall surface of the heating chamber An intake port and an exhaust port provided on the convection unit, and a convection unit that heats the air in the heating chamber from the intake port, heats the air, and exhausts the air from the exhaust port into the heating chamber. wherein the high-frequency heating tray comprises a first tray which is formed of a material which transmits high frequency, detachably mounted on said first tray generates heat by a high frequency is irradiated A second tray formed by kneading the frequency heating element with silicon, and the first tray is provided with a space allowing ventilation between the bottom surface and the second tray. trays, said has an opening in a region for installing the object to be heated, on the mounting table, in a state where the first tray and the second tray over is placed, by the convection unit When hot air convection heating is performed, at least a part of the hot air from the convection unit flows into the space of the first tray and passes between the bottom surface of the first tray and the second tray. To do .

According to the present invention, a first tray formed of a material that transmits high frequency and a high frequency heating element that is detachably installed on the first tray and generates heat when irradiated with high frequency are kneaded into silicon. And a second tray formed. For this reason, it is possible to select cooking that performs heating by heat conduction together with high-frequency heating and cooking that performs only high-frequency heating, thereby improving usability.
The second tray can be scorched by high-frequency heat generation, and the first tray, which does not generate heat, can be used as a grip during transportation or as an installation base during installation to reduce high temperature discomfort during transportation. And troubles such as discoloration of the installation location can be prevented.
In addition, when the object to be heated is not desired to be burned, only the first tray can be used, and only high-frequency heating inside the object to be heated by high frequency can be performed.

It is sectional drawing which looked at the principal part of the tray for high frequency heating which shows Embodiment 1 of this invention, and a high frequency heating apparatus from the side surface. It is a control block diagram of the high-frequency heating device showing Embodiment 1 of the present invention. It is a top view of the non-heat-generating tray which shows Embodiment 1 of this invention. It is a top view of the heat generating tray which shows Embodiment 1 of this invention. It is the top view and sectional drawing in the state which installed the non-heat-generating tray on the heat-generating tray which shows Embodiment 1 of this invention. It is sectional drawing of the square plate and tray for high frequency heating which shows Embodiment 1 of this invention. It is sectional drawing at the time of heat_generation | fever tray accommodation which shows Embodiment 1 of this invention. It is sectional drawing which shows the other structural example of the tray for high frequency heating which shows Embodiment 1 of this invention. It is a food temperature log | history schematic diagram at the time of the relay heating which shows Embodiment 1 of this invention. It is a food temperature log | history schematic diagram at the time of the simultaneous heating which shows Embodiment 1 of this invention. It is a food temperature log | history schematic diagram at the time of the alternating heating which shows Embodiment 1 of this invention. It is an example of the operation panel of the high frequency heating apparatus which shows Embodiment 1 of this invention.

Embodiment 1 FIG.
FIG. 1 is a cross-sectional view of the main parts of a high-frequency heating tray and a high-frequency heating device showing Embodiment 1 of the present invention as viewed from the side.
In FIG. 1, the high-frequency heating device main body 4 is provided with a heating chamber 5 for storing an object to be heated 40, opens the door 7, and installs the square plate 3, a high-frequency heating tray, and the object to be heated 40. Then, the door 7 is closed, and the cooking is performed by inputting and operating the setting on the operation panel 50 (described later).

The high-frequency heating tray includes a non-heating tray 1 and a heating tray 2. The high-frequency heating tray is installed in the heating chamber 5 and the object to be heated 40 is placed thereon.
The non-heat generating tray 1 is made of a material that transmits high frequency such as silicon. The heat generating tray 2 is detachably installed on the non-heat generating tray 1 and is formed by kneading silicon with a high frequency heating element that generates heat when irradiated with high frequency. Details will be described later.
The non-heat generating tray 1 corresponds to the “first tray” in the present invention. The heating tray 2 corresponds to a “second tray” in the present invention.

  3 is a square dish. The square plate 3 is made of a material that transmits high frequency, for example, ceramic. The high frequency irradiated from the lower surface of the heating chamber 5 passes through the square plate 3 and is absorbed by the heating tray 2 and the object to be heated 40 placed on the upper surface of the square plate 3, so that each can generate heat. . The square plate 3 corresponds to the “mounting table” in the present invention.

6 is a square plate rail. The square dish rail 6 is configured on the side wall of the heating chamber 5. The flange part 3a of the square plate 3 is installed on the square plate rail 6, and it is slid from the opening side of the door 7 and placed in the cabinet.
At that time, a tray position fixing convex portion 3b is formed on the square plate 3 so that the non-heat generating tray 1 and the heat generating tray 2 do not slide back and forth. By forming the tray position fixing convex portion 3b, the heating tray 2 and the object to be heated 40 do not jump out or fall off even when the square plate 3 is put in and out vigorously, and can be used safely. The tray position fixing convex portion 3b corresponds to the “convex portion” in the present invention.
In the present embodiment, the case of forming the tray position fixing convex portion 3b that restricts the sliding of the non-heat generating tray 1 and the heat generating tray 2 will be described, but the shape is not limited to the convex shape and may be a concave shape.

  When the square dish 3 is installed on the square dish rail 6 and used, the effect of promoting the heating can be expected by bringing the heated object 40 close to the flat heater 23 which is a heat source, or the falling object from the heated object 40, For example, there is an effect of preventing oil, food waste, etc. from falling into the heating chamber 5 and becoming dirty. The square plate 3 is not necessarily used, and the object to be heated 40, the non-heating tray 1 and the heating tray 2 may be installed on the high-frequency transmission plate 14 and heated.

  Further, a plurality of square dish rails 6 may be provided on the side wall with different heights. This is because the heating condition can be changed by changing the installation height of the square plate 3.

  Reference numeral 8 denotes a high frequency oscillator. The high frequency oscillator 8 is a magnetron that oscillates a microwave of 2.45 GHz, for example. The microwave oscillated from the high frequency oscillator 8 propagates inside the waveguide 9 and is transmitted to the antenna 10. The antenna 10 is installed in the form of coaxial coupling at the connection between the antenna chamber 12 and the waveguide 9, and microwaves are transmitted to the antenna chamber 12.

  When the microwave is propagated from the antenna chamber 12 to the heating chamber 5, by rotating the antenna 10, the electric field distribution of the microwave transmitted into the heating chamber 5 can be made as diverse as possible. It becomes possible to level the heating unevenness when the is heated. The antenna 10 is rotationally driven by an antenna motor 11 fixed to the lower portion of the waveguide 9.

  In this way, the microwave to be supplied from the high frequency oscillator 8 causes the object to be heated 40 installed in the heating chamber 5 to be dielectrically heated in a state where heating unevenness is suppressed as much as possible. A characteristic of dielectric heating by microwaves is that water molecules can be selectively heated easily, and it tends to be heated to the inside of the object to be heated 40 as compared to radiation heating by a heater described later. As a big feature.

  A lower heater 13 composed of, for example, a sheathed heater is installed inside the antenna chamber 12, that is, below the bottom surface of the heating chamber 5. The lower heater 13 is installed at a position that does not interfere with the antenna 10 and can be used for heating when the object to be heated 40 is radiantly heated from below or when the atmosphere temperature in the heating chamber 5 is increased. The lower heater 13 is not limited to a sheathed heater, and any heater such as a glass tube heater can be used.

  Reference numeral 14 denotes a high-frequency transmission plate. The high frequency transmission plate 14 is formed of ceramic similarly to the square plate 3, and is configured as a bottom plate of the heating chamber 5. As described above, the object to be heated 40 and the non-heat generating tray 1 can be directly placed and heated here.

  Reference numeral 15 denotes a convection unit. The convection unit 15 is connected to a ventilation hole 19 (intake port and exhaust port) formed in the wall surface (rear surface) of the heating chamber 5, and convection heating with hot air is performed on the object to be heated 40 in the heating chamber 5. It is the composition which can do. Reference numeral 16 denotes a convection heater. The convection heater 16 is composed of, for example, a glass tube heater. Reference numeral 17 is a convection fan, and 18 is a convection motor. The convection fan 17 rotates by obtaining driving force from the convection motor 18, sucks air in the heating chamber 5 from the intake port, heats the air, and exhausts the air into the heating chamber 5 from the exhaust port. As a result, an air path that circulates inside the heating chamber 5 and the convection unit 15 is formed, and the object to be heated 40 installed in the heating chamber 5 is heated with convection.

Specifically, the air in the heating chamber 5 is sucked into the convection unit 15 through the ventilation hole 19 (intake port) close to the square plate 3 shown in FIG. 1, and the hot air 26 heated by the convection heater 16 is supplied to the convection heater 16. It discharges to the heating chamber 5 side from the opposing ventilation hole 19 (exhaust port). The discharged hot air 26 circulates in the heating chamber 5 and is sucked into the convection unit 15 while heating the object to be heated 40 placed on the square plate 3. Further, a part of the hot air 26 has a structure in which the object to be heated 40 is heated from below by passing through a ventilation portion 35 (described later) provided on the side surface of the non-heating tray 1.
Although the case where the convection unit 15 is provided on the back surface of the heating chamber 5 will be described in the present embodiment, the present invention is not limited to this, and the convection unit 15 may be provided on the side surface (right side surface or left side surface) of the heating chamber 5.

  In the heating chamber 5, an infrared sensor 54 and a thermistor 55, which are temperature detection means, are provided, and the detected temperatures are respectively input to a control device 51 (described later).

  Reference numeral 20 denotes a heater unit. The heater unit 20 includes a heat insulating material 21, a heater cover 22, and a flat heater 23. The flat heater 23 is, for example, a mica-like core surface around which a nichrome heating wire is wound substantially and is fixed in contact with the wall surface (top surface) of the heating chamber 5. The object to be heated 40 is radiantly heated through the surface. At that time, the upper side of the flat heater 23 is covered with the heat insulating material 21 so that the heating chamber 5 side can be efficiently heated. The heat insulating material 21 is made of a material such as glass wool or rock wool.

Further, the heater cover 22 is installed to fix the heat insulating material 21 and the flat heater 23 and prevent the temperature from rising due to heat leakage to the outside of the heater. The heater cover 22 prevents heat leakage due to radiant heat by lowering the outside emissivity, or suppresses temperature rise on the upper surface of the heater cover 22 and thus the upper surface of the heating chamber 5 by cooling with ventilation by a cooling fan (not shown).
In the present embodiment, the case where the flat heater 23 is provided on the top surface of the wall surface of the heating chamber 5 will be described. However, the present invention is not limited to this, and in addition to the top surface of the heating chamber 5 or in place of the top surface. And may be provided on the side surfaces (the right side surface, the left side surface, and the back surface).

Next, the control block will be described.
FIG. 2 is a control block diagram of the high-frequency heating device showing Embodiment 1 of the present invention.
The power supply to the control device 51 and the power supply device 53 is controlled by the main board 52 that controls on and off of the power supply to the high-frequency heating device body 4.
The power supply device 53 is connected to the antenna motor 11, the inverter (INV) substrate 57, the high-frequency oscillator 8 (magnetron), the lower heater 13, the convection unit 15, and the flat heater 23 via a relay 56. In the operation panel 50, the control device 51 controls the relay 56 according to the heating mode described later, based on the setting / input information input by the input means 50a, and controls whether to supply power to each heat source.

Further, the control device 51 acquires temperature information from the infrared sensor 54 and the thermistor 55 that are temperature detection means, and controls the on / off of the relay 56 to prevent an excessive increase in the internal temperature. For example, the infrared sensor 54 has a temperature detection visual field in the entire region of the inside of the cabinet, and when the heating tray 2 is installed alone in the heating chamber 5 and microwave heating is performed without the object to be heated 40, It is possible to increase the safety because it is possible to detect that the temperature rise rate is fast and to give a warning to the notification means 50b, or to turn off the power based on a command from the control device 51. is there.
The operation panel 50 corresponds to “setting input means” in the present invention. The control device 51 corresponds to “control means” in the present invention.

Next, details of the high-frequency heating tray will be described.
FIG. 3 is a plan view of the non-heat generating tray showing the first embodiment of the present invention.
FIG. 4 is a plan view of the heat generating tray showing the first embodiment of the present invention.
FIG. 5 is a plan view and a cross-sectional view in a state where a non-heating tray is installed on the heating tray showing the first embodiment of the present invention.
The non-heat generating tray 1 is a tray which is formed only from substantially silicon and does not have a self-heating function by high frequency heating.
The heat generating tray 2 is a tray having a heat generating function by high frequency heating by kneading and forming a powdered metal oxide (ferrite powder) in silicon as a high frequency heating element.
An object to be heated 40 is placed on the heat generating tray 2. When the high frequency heating is performed, the high frequency heating elements of the heat generating tray 2 generate heat, and the back surface, which is the installation surface of the object to be heated 40, can be heated by heat conduction.

Note that, even in the non-heating tray 1, slight self-heating may occur due to moisture and dielectric loss components contained in silicon, but the self-heating function here is intentionally kneading a high-frequency heating element such as ferrite. Say something that generates heat. In addition, it is well known that when forming the non-heat generating tray 1, it is possible to add a release agent or a vulcanizing agent to the silicon molding to improve the workability and flexibility. There is no problem even if you apply.
In the present embodiment, the case where the non-heat generating tray 1 is formed of silicon will be described. However, the present invention is not limited to this, and may be formed of a material that transmits high frequency. For example, you may form with a ceramic.

The ferrite kneaded in the silicon forming the heat generating tray 2 receives high frequency electromagnetic waves and absorbs and generates heat mainly as a magnetic loss due to its own magnetism. As an example, using a MgCu-based ferrite or the like having a function of stopping the temperature increase at a predetermined temperature can stop the temperature increase at a safe temperature. Thus, as the high-frequency heating element kneaded in the heating tray 2, a material that stops the temperature rise at a predetermined temperature is desirable.
Ferrite is likely to have a reddish brown finish due to its material color, especially as a tool for heating foods, it may evoke rust and impede purchase motivation. It is good to make it. Thereby, it becomes possible to finish it in the color which makes cooking utensils, such as a frying pan, image, and it can suppress a consumer's sense of resistance.

The high-frequency heating element kneaded in the heating tray 2 is not limited to ferrite, and any material that generates heat when irradiated with a high frequency may be used.
For example, the same microwave absorbing function can be provided by kneading carbon powder as a high-frequency heating element. Since carbon tends to have a smaller heat capacity than ferrite, the temperature can be raised with a small amount of blending. Moreover, since it tends to cool down, the cooling time after cooking can be shortened and the possibility of burns can be reduced.

As shown in FIGS. 3 and 5, the non-heat generating tray 1 is configured in a shape including a net / heat generating tray mounting portion 30, a grip portion 31, a fitting pin 32, a leg portion 34, and a ventilation portion 35.
The net portion / heat generating tray mounting portion 30 is shaped so that the net portion 28 is substantially fixed when the heat generating tray 2 is installed, and functions as a beam that supports the heat generating tray 2. Moreover, the net | network part and heat_generation | fever tray mounting part 30 can play the role of a net | network alone in the state in which the heat generation tray 2 is not installed, and can also use the to-be-heated material 40 directly for a heating.

  The grip portion 31 is for a user to grip the non-heat generating tray 1 and can be easily held to increase convenience. Further, the heat generating tray 2 is installed in a fitted state at a position where it does not contact the grip portion 31. As a result, the non-heat generating tray 1 can be lifted without directly touching the heated object 40 or the heat generating tray 2, so that it is possible to avoid giving the user a high temperature discomfort, which is safe and secure. It is.

  When the heat generating tray 2 is placed on the non-heat generating tray 1, the fitting pin 32 is engaged with the fitting hole 33 of the heat generating tray 2 so as not to be displaced due to sliding back and forth and right and left. It is a projection for doing. It is used in the form of fitting into the fitting hole 33 of the heating tray 2. Since it is used in the form of fitting, it has the effect that the heat generating tray 2 that is at a high temperature is not accidentally dropped during transportation.

  In the example of the present embodiment, the legs 34 have two flat plates as legs, and are configured to have such strength that the eight mesh / heat-generating tray mounting parts 30 can be kept horizontal during installation. If there is a concern about insufficient strength, the legs may be increased as necessary.

The ventilation section 35 is provided on the side surface of the non-heat generating tray 1 and forms a space in which ventilation is possible between the bottom surface of the non-heat generating tray 1 and the heat generating tray 2.
The ventilation portion 35 constitutes a part of the path of the hot air 26 that is circulated in the heating chamber 5 by the wind generated by the convection fan 17 described above. When the hot air 26 is passed through the lower part of the net part / heating tray mounting part 30, it is possible to effectively heat the lower part of the article 40 to be heated and to evaporate the moisture of the article 40 to be heated.

As shown in FIGS. 4 and 5, the heat generating tray 2 includes a mesh portion 28, an opening portion 29, and a fitting hole 33.
The mesh portion 28 is formed in a mesh shape, and is installed so as to be fitted on the upper portion of the mesh portion / heating tray mounting portion 30 described above.
The opening 29 communicates to the lower surface at a portion other than the mesh portion 28, and drops hot oil or moisture from the object to be heated 40 installed at the upper portion or generates hot air that is generated by the convection unit 15 and flows through the ventilation portion 35. 26 gives to the article 40 to be heated, and has an effect of promoting heating and drying.

  As described above, when the heat generating tray 2 is placed on the non-heat generating tray 1, the fitting hole 33 is fitted with the fitting pin 32 so as not to be displaced by sliding back and forth and right and left. Is to do. The fitting hole 33 corresponds to a “fitting portion” in the present invention.

FIG. 6 is a cross-sectional view of a square plate and a high-frequency heating tray showing Embodiment 1 of the present invention.
The non-heat generating tray 1 and the heat generating tray 2 can be used alone or in combination.
That is, in addition to the method of installing the heat generating tray 2 on the non-heat generating tray 1 shown in FIG. 5, as shown in FIG. A method of installing the object to be heated 40 is also possible. Moreover, as shown in FIG. 6 (B), a system in which the non-heat generating tray 1 is placed on the square plate 3 and the article to be heated 40 is installed thereon is also possible. In this manner, at least one of the non-heat generating tray 1 and the heat generating tray 2 is placed on the square plate 3, and high-frequency heating can be performed.
Note that, as shown in FIG. 6C, a method of using the object to be heated 40 by placing it directly on the square plate 3 without using both the non-heat generating tray 1 and the heat generating tray 2 is also possible. Needless to say.

In this way, the non-heat generating tray 1 formed of a material that transmits high frequency and the high-frequency heating element that is detachably installed on the non-heat generating tray 1 and generates heat when irradiated with high frequency are kneaded into silicon. By providing the heat-generating tray 2 formed, it is possible to select cooking that performs heating by heat conduction together with high-frequency heating and cooking that performs only high-frequency heating, thereby improving usability.
In addition, the non-heat generating tray 1 that does not generate heat can be used for the gripping during transportation and as an installation base during installation by enabling high-frequency heat generation on the heating tray 2, thereby reducing high temperature discomfort during installation and installation. It is possible to prevent problems such as discoloration of places.
In addition, when it is not desired to burn the object to be heated 40, only the non-heat generating tray 1 can be used, and only high-frequency heating inside the object to be heated 40 by high frequency can be performed.
Furthermore, since the non-heating tray 1 does not use a metal member, it is possible to significantly reduce the high-frequency spark occurrence probability.

FIG. 7 is a cross-sectional view of the heating tray stored in the first embodiment of the present invention.
At least one of the non-heat generating tray 1 and the heat generating tray 2 may be formed of an elastomer and have flexibility.
For example, the heat generating tray 2 can be made flexible by forming a high frequency heating element in a silicon elastomer. Thus, storage property can be improved.
As shown in FIG. 7, it is flat when in use, but it can be stored with its dimensions reduced by taking advantage of the characteristics of a flexible silicon material. By using the fitting hole 33 to insert the storage fastener 36, it is possible to suppress the opening of the heat generating tray 2, and it can be stored in a space-saving manner as if the paper is rolled.
In addition, although the system fixed with the storage fastener 36 was shown here, you may take the form which accommodates in a pipe | tube, or the form accommodated by bending. Further, the storage fastener 36 may be provided in a part of the heating tray 2.
Note that the non-heat generating tray 1 may also be formed of a silicon elastomer so as to improve the storage property.

FIG. 8 is a sectional view showing another configuration example of the high-frequency heating tray showing the first embodiment of the present invention.
In the above description, the case where the ventilation portion 35 is provided on the side surface of the non-heat generating tray 1 and the hot air 26 is ventilated has been described. Instead, as shown in FIG. You may do it.
The concave portion 37 of the non-heat generating tray 1 has a concave shape so that water 41 can be put therein. The recess 37 communicates with the opening 29 of the heat generating tray 2.
With such a configuration, when the water 41 introduced into the concave portion 37 is heated by high-frequency heating, the water 41 is vaporized, and this steam is discharged from the opening 29, and steam cooking that heats the object to be heated 40 with steam is possible. Become.
In addition, the microwave that has not been absorbed by the water 41 generates heat from the high-frequency heating element of the heating tray 2, and the back surface, which is the installation surface of the object to be heated 40, can be heated by heat conduction.
According to this structure, while heating the water 41 effectively and producing | generating steam, the to-be-heated material 40 itself and the heat generating tray 2 can be heated using an excess microwave, and efficient steaming cooking is attained. .

Next, the heating mode and the operation of the heat source that can be performed by the high-frequency heating device in the present embodiment will be described.
The control device 51 executes an arbitrary heating mode selected by the operation panel 50 among the plurality of heating modes. Then, control device 51 controls the operation of high-frequency heating and grill heating (heater heating) according to the detected temperature of infrared sensor 54 and thermistor 55 and the preset temperature set in accordance with the heating mode. In addition, you may control the heating operation of each heat source not only with setting temperature but with the heating time and heating output which were preset according to heating mode.
Hereinafter, the installation state of the high-frequency heating tray according to the type and application of the object to be heated 40 and details of each heating mode will be described.

(Relay heating mode)
The relay heating mode is a heating mode in which after high-frequency heating by the high-frequency oscillator 8, radiant heating by the flat heater 23 and the lower heater 13 and grill heating (heater heating) by convection heating by the convection heater 16 are performed.
Here, the case where crispy pizza is cooked by heating will be described as an example.

FIG. 9 is a schematic diagram of food temperature history during relay heating showing Embodiment 1 of the present invention.
When cooking crispy pizza, in order to produce a so-called crispy (crispy) texture, it is necessary to bake the back side of the dough well, and also to heat the surface on which the ingredients are placed. Moreover, an appropriate dry state is also required.
For this reason, in this heating mode, as shown in FIGS. 1 and 5, the non-heat generating tray 1 and the heat generating tray 2 are installed on the square plate 3, and the object to be heated 40 is on the upper surface of the heat generating tray 2. Install crispy pizza.

  As shown in FIG. 9, in the first half of the heating, high-frequency heating is performed by the high-frequency oscillator 8 to generate heat in the heating tray 2 and to bake the back surface of the fabric, and the ingredients on the fabric surface are directly heated by microwaves. (Dielectric heating) to raise the temperature.

The heating tray 2 rises to about 200 ° C. to 250 ° C. by the microwave, and the back surface can be sufficiently burnt. After that, switching to grill heating is performed. By microwave heating alone, the material having a large amount of moisture on the surface is mainly dielectrically heated, so that it is difficult to rise to a temperature exceeding 100 ° C. and the surface is not easily burnt. Therefore, the latter half of the heating shifts to radiant heating by the flat heater 23 and grill heating by convection heating by the convection heater 16.
According to the sequence of this heating mode, it becomes possible to raise the temperature to the inside of the ingredients and dough by microwave effect while sufficiently scorching the crispy pizza surface and back surface, and passing hot air through the back surface Thus, the dough can be appropriately dried, and a sufficient finish can be obtained both in terms of charring and temperature rise.

(Simultaneous heating mode)
The simultaneous heating mode is a heating mode in which high-frequency heating by the high-frequency oscillator 8 and radiant heating by the flat heater 23 and the lower heater 13 and grill heating (heater heating) by convection heating by the convection heater 16 are performed simultaneously.
Here, the case where a hamburger is cooked by heating will be described as an example.

FIG. 10 is a schematic diagram of food temperature history during simultaneous heating, illustrating Embodiment 1 of the present invention.
When cooking hamburger, it is the same as crispy pizza in that the front and back must be burnt, but the food has a thickness, and from the viewpoint of hygiene, the temperature needs to rise sufficiently to the inside of the meat . Therefore, it is difficult cooking in which heat transfer from the outer surface, radiation, and convection heating may not be sufficiently transmitted to the inside.
Therefore, in hamburger cooking, as shown in FIG. 6A, the heating tray 2 is independently installed on the square plate 3 so that the drying on the back surface does not proceed with hot air.

  And as shown in FIG. 10, it heats in the sequence which implements microwave heating and grill heating simultaneously from the heating initial stage. Thereby, it heats with the heat conduction from the heat_generation | fever of the heat generating tray 2, and also radiates from the upper surface by the flat heater 23 is implemented. Further, the microwaves that are not absorbed by the heating tray 2 are absorbed by the hamburger that is the object to be heated 40 and heats the inside.

  According to the sequence of this heating mode, the upper surface is burnt by radiation, the lower surface is burnt by heat conduction, the inside is heated by microwaves, and the outside is burned at about 200 ° C. so as not to miss the meat juice. However, there is no redness in the interior, and the temperature can be raised to about 80 ° C. so that there is no problem in terms of hygiene.

(Alternate heating mode)
The alternating heating mode is a heating mode in which high-frequency heating by the high-frequency oscillator 8 and radiant heating by the flat heater 23 and the lower heater 13 and grill heating (heater heating) by convection heating by the convection heater 16 are alternately performed.
Here, it is assumed that the curry is put into a container that transmits microwaves, such as glass and ceramic, and the simmered for a long time. Curry is an example, and the same applies to stew and potov.

FIG. 11 is a schematic diagram of food temperature history during alternate heating, illustrating Embodiment 1 of the present invention.
In general, stew is a cooking that wants to be heated gently and evenly because the ingredients are more likely to taste when taken for a long time.
Therefore, in the case of such cooking, in order to make the best use of the effect of directly heating the food with microwaves, as shown in FIG. 6B or FIG. A container with curry is placed on the upper or non-heat generating tray 1 and heated.
In particular, when it is desired to place importance on heating from the top while covering the container to prevent moisture inside the container, the container is placed on the non-heating tray 1 as shown in FIG. carry out.
Further, as an effect of performing the heating on the square plate 3, there is a point that the high frequency transmission plate 14, which is the floor surface in the heating chamber 5, can be obtained even if it blows down.

  When a large amount of curry is boiled, in a cooked dish in which various ingredients are added by heating only with microwaves, convection is likely to occur locally and with little change in state. However, as shown in FIG. 23 and the convection heater 16 are operated intermittently to switch the heat source, so that various convection states can be created in the container, and the effect of equalizing the internal temperature of the simmering heating can be obtained.

Next, the operation panel 50 that performs the selection operation of each heating mode described above will be described.
FIG. 12 is an example of an operation panel of the high-frequency heating device showing Embodiment 1 of the present invention.
In the operation panel 50, a relay heating mode that divides the first half and the second half of the cooking process, an alternate heating mode that alternately heats the microwave and the heater, and a simultaneous heating mode that heats simultaneously can be selected.
In the relay heating mode, the heating mode and the time are set for the first half process and the second half process, respectively.

  As shown in FIG. 12, as an example of the relay heating mode selection procedure, the heating mode of the first half process is selected with the heating mode selection key 61A, and the heating time is selected with the heating time setting key 60A. Thereafter, the heating mode selection key 61B is used to select the heating mode of the latter half process, the heating time is selected using the heating time setting key 60B, and then heating is started using the heating start key 63.

  As described above, the control device 51 operates the relay 56 in accordance with the heating mode, executes the heating mode of the first half process selected by the above operation for the set heating time, and then sets the heating mode of the second half process. Run for a specified heating time. At this time, the notification means 50b displays the heating mode and the remaining heating time, and notifies the user of the state.

  The menu key 62 is used to select a menu in which the heating mode and the heating time are stored in advance in a storage device (not shown) in the control device 51, so that heating can be started without fine mode selection or time setting. You may make it provide the automatic heating mode which can cook with the key 63. FIG. In this case, the notification means 50b displays an accessory recommended for use (any one or a combination of the non-heat generating tray 1, the heat generating tray 2, and the square plate 3) according to the heating mode.

  Reference numeral 64 denotes a cancel key, which stops the operation and returns the heating setting to the initial value. This key is used to stop cooking or to redo the settings.

  Each heating mode can be arbitrarily selected in order for the user to obtain a desired finished state, and the pleasure of confirming the finished can be produced. For example, even if the same cooking is performed next time, it is possible to configure the apparatus as a device that can be enjoyed with improvements and improvements such as changing the combination of heating modes and the heating time.

As described above, the heat generating tray 2 is made of silicon having high heat resistance, and the high frequency heating and grill heating (heater heating) are controlled according to the heating mode selected by the operation panel 50. It can also be used for radiation heating or convection heating using a heater. That is, simultaneous heating with dielectric heating, relay heating (sequential heating with different heat sources), and alternate heating are possible, and it is possible to achieve both of scorching and internal heating, so that the finished state of the food is improved.
In addition, it is possible to select cooking that performs heating by heat conduction together with high-frequency heating and cooking that performs only high-frequency heating, thereby improving usability.

  As an application example of the present invention, the present invention can be applied to a high-frequency heating apparatus using a high-frequency heating tray, particularly a business-use and household heating cooker.

  DESCRIPTION OF SYMBOLS 1 Non-heating tray (1st tray), 2 Heating tray (2nd tray), Square plate, 3a Flange part, 3b Convex part for tray position fixing, 4 High frequency heating device main body, 5 Heating chamber, 6 Square plate Rail, 7 door, 8 high frequency oscillator, 9 waveguide, 10 antenna, 11 antenna motor, 12 antenna room, 13 lower heater, 14 high frequency transmission plate, 15 convection unit, 16 convection heater, 17 convection fan, 18 convection motor, 19 Ventilation hole, 20 Heater unit, 21 Heat insulating material, 22 Heater cover, 23 Flat heater, 26 Hot air, 28 Net part, 29 Opening part, 30 Net part and heating tray mounting part, 31 Gripping part, 32 Fitting pin, 33 Fitting hole, 34 Leg, 35 Ventilation part, 36 Storage fastener, 37 Recess, 40 Cover Thermal material, 41 Water, 50 Operation panel, 50a Input means, 50b Notification means, 51 Control device, 52 Main board, 53 Power supply, 54 Infrared sensor, 55 Thermistor, 56 Relay, 57 Inverter board, 60A Heating time setting key, 60B Heating time setting key, 61A Heating mode selection key, 61B Heating mode selection key, 62 Menu key, 63 Heating start key, 64 Cancel key.

Claims (12)

A heating chamber for storing an object to be heated;
A high-frequency oscillator that oscillates a high frequency;
A waveguide connected to the heating chamber and guiding a high frequency oscillated from the high-frequency oscillator to the heating chamber;
A mounting table installed in the heating chamber and formed of a material that transmits high frequency;
Is installed in the heating chamber, and the high-frequency heating tray object to be heated is placed,
An intake port and an exhaust port provided on the wall surface of the heating chamber;
A convection unit that heats the air in the heating chamber from the intake port, heats the air, and exhausts the air from the exhaust port into the heating chamber;
With
The high-frequency heating tray is:
A first tray formed of a material that transmits high frequencies;
A high-frequency heating element that is detachably installed on the first tray and generates heat when irradiated with high frequency, and a second tray formed by kneading silicon .
The first tray is provided with a space allowing ventilation between the bottom surface and the second tray,
The second tray has an opening in a region where the object to be heated is installed,
When the hot air convection heating is performed by the convection unit in a state where the first tray and the second tray are placed on the mounting table,
At least part of the hot air from the convection unit flows into the space of the first tray and passes between the bottom surface of the first tray and the second tray. A high-frequency heating device . The high- frequency heating device according to claim 1, wherein the high-frequency heating element is a powdered metal oxide or carbon. 3. The high frequency heating apparatus according to claim 1, wherein at least one of the first tray and the second tray is made of an elastomer and has flexibility. The said 2nd tray has a fitting part fitted with said 1st tray, and is installed in a fitting state on said 1st tray, The any one of Claims 1-3 characterized by the above-mentioned. The high-frequency heating device according to one item. The first tray has a gripping part for a user to grip the first tray,
The high frequency heating apparatus according to claim 4, wherein the second tray is installed in a fitted state at a position where it does not contact the gripping portion. The high-frequency heating device according to any one of claims 1 to 5 , wherein at least a second tray of the first tray and the second tray is black. The mounting table according to any one of claims 1 to 6 , wherein the mounting table is formed with a convex portion or a concave portion that restricts sliding of at least one of the first tray and the second tray. High frequency heating device. A heater installed on at least one of the wall surfaces of the heating chamber to heat the object to be heated;
Setting input means for inputting an operation related to selection of the heating mode;
Depending on the selected heating mode, high-frequency heating apparatus according to any one of claims 1 to 7, characterized in that a control means for controlling the heating operation of the heater and the high-frequency oscillator. The control means includes
9. The high frequency heating apparatus according to claim 8 , wherein the heating mode includes a relay heating mode in which heater heating by the heater is performed after high frequency heating by the high frequency oscillator. The control means includes
Examples heating mode, the high frequency oscillator frequency heating apparatus according to claim 8 or 9, wherein further comprising a simultaneous heating mode for simultaneously and heater heating by the heater and the high-frequency heating by. The control means includes
The high-frequency heating device according to any one of claims 8 to 10 , wherein the heating mode includes an alternate heating mode in which high-frequency heating by the high-frequency oscillator and heater heating by the heater are alternately performed. Temperature detecting means for detecting at least one of the temperature in the heating chamber and the temperature of the high-frequency heating tray;
The control means includes
A detection temperature of said temperature sensing means, wherein in response to a set temperature set in advance according to the heating mode, any claim 8-11, characterized in that for controlling the heating operation of the high-frequency oscillator and the heater high-frequency heating apparatus according to an item or.

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