JP2014016069A - Heated object loading means and microwave heating device using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a microwave heating device in which heating means does not interfere with a constitution for microwave irradiation, and capable of preventing loss of microwave in an induction heating operation, improving efficiency in induction heating, and performing such heating that eating texture and flavor are given to both surfaces of a food material by baking the surfaces brown and slightly burnt.SOLUTION: A microwave heating device includes: a first power supply port 19 and a second power supply port 28, disposed in a heating chamber 15, for applying the microwave from upper and lower sides thereof; and a first grill pan 34 and a second grill pan 35 having bases composed of an electric-wave-permeable non-metal material and occupying the approximately whole area of a plain surface of the heating chamber. The first grill pan 34 and the second grill pan 35 have heating-element heating means 36 composed of a microwave heating element on respective portions of lower surfaces thereof, and are provided with metallic covers on the remaining portions of the lower surfaces. As food 14 is heated while held between two first grill pan 34 and second grill pan 35, both surfaces of the food 14 can be baked brown and slightly burnt with a simple constitution even by the microwave heating device performing induction heating by microwave.

Description

  The present invention uses a microwave heating element that absorbs microwaves and generates heat, as a heating means, as a heating method for a non-heated material that combines radiant heat and convection heat. It is related with the to-be-heated material mounting means which can cook an oven or a grill, and a microwave heating apparatus using the same.

  With the widespread use of microwave ovens, cooking foods using a microwave oven has been widely performed for convenience. Microwave ovens irradiate the entire food with microwaves generated from a magnetron, causing the water molecules contained in the food to vibrate and resonate, and heat is generated by vibration friction between the water molecules. More heated. However, simply heating the food using a microwave oven cannot give the food the fragrance, scorch, or crispyness (so-called crispyness) generated by baking or scorching, for example.

  Therefore, in recent years, a microwave heating apparatus in which a microwave oven and a heater heating apparatus are integrated has been put into practical use.

  In these microwave heating devices, a heater is provided in the heating chamber, and the food that is the object to be heated is directly heated by radiant heat from the heater, or the air in the heating chamber is heated to raise the temperature in the heating chamber. Then, the food placed in the heating chamber is cooked to burn and burn.

  As described above, a conventional microwave heating apparatus has a configuration in which heaters are installed on the upper surface and the bottom surface of a heating chamber to heat food disposed therein (see, for example, Patent Document 1).

JP 2006-308114 A

  However, in the conventional microwave heating apparatus provided with the upper and lower heaters, the heaters need to be arranged at the top and bottom of the heating chamber, which interferes with the configuration for microwave irradiation.

  FIG. 6 is a cross-sectional view of a microwave heating apparatus provided with a conventional upper and lower heater described in Patent Document 1.

  As shown in FIG. 6, the microwave heating apparatus includes an upper heater 67, lower heaters 65 a and 65 b, a rotating antenna 66, a receiving tray 63, a metal heater cover 64, a heating chamber 62, and a thermistor 61. A food to be heated is placed in the heating chamber 62, and the lower heaters 65a and 65b and the upper heater 67 are energized, so that the radiant heat radiated from the upper heater 67 and the lower heaters 65a and 65b, The food is cooked by increasing the air temperature. Moreover, electric power control can be performed by detecting temperature by the thermistor 61 and obtaining temperature information in the heating chamber 62.

  In the conventional microwave heating apparatus configured as described above, when the upper heater 67 is disposed in the heating chamber 62 at a place where microwave irradiation is performed, a part of the microwave is applied to the constituent members of the upper heater 67. Is absorbed and heat is lost, and microwaves are likely to leak out of the heating chamber 62 via the upper heater 67 depending on the type and configuration of the upper heater 67, so that the microwave shielding structure for preventing leakage is complicated. There was a problem to become.

  In addition, as a configuration for irradiating microwaves, rotating parts such as a turntable, a rotating antenna, and a rotating stirrer are generally arranged near the wall surface of the heating chamber and occupy a considerably large space. Also in the conventional microwave heating apparatus of FIG. 6, the rotating antenna 66 is provided, the rotating space becomes an obstacle, and it is difficult to arrange the lower heaters 65a and 65b at the optimum positions.

  Thus, it is necessary to consider the arrangement of the lower heaters 65a and 65b so as not to interfere with the microwave irradiation configuration, and the arrangement of the upper and lower heaters is limited, making it difficult to make the heating distribution uniform. Had.

  The present invention solves the above-described conventional problems, and by providing a heating means instead of a heater whose arrangement in the heating chamber is limited, loss of microwaves when heating food by only dielectric heating is prevented. In addition, the food can be heated to give food with a texture and flavor by baking or scorching on both sides of the food, improving the efficiency of dielectric heating and improving the heating performance including the surface color and surface condition of the object to be heated It is an object of the present invention to provide an object placing means and a microwave heating apparatus using the same.

  In order to solve the above-described conventional problems, the object-to-be-heated mounting unit according to the present invention is an object to be heated for use in a heating chamber in which microwaves are irradiated by the microwave heating means while the object to be heated is stored. The object to be heated is placed on a part of the lower surface of the substrate, and is configured by a substrate using a radio wave transmissive non-metallic material that occupies substantially the entire area of the heating chamber plane. A heating element heating means configured by a microwave heating element that absorbs microwaves generated by the microwave heating means and generates heat, and a lower surface portion other than the heating element heating means formed on the lower surface of the base body It is provided with a metal cover formed.

  In order to solve the above-described conventional problems, a microwave heating apparatus according to the present invention includes a heating chamber for storing an object to be heated, and microwave heating for irradiating the object to be heated stored in the heating chamber with microwaves. And a microwave that is formed on a part of the lower surface of the substrate and is irradiated by the microwave heating unit. A heating element heating means configured to generate heat by absorbing heat and a metal cover formed on a lower surface portion of the lower surface of the base other than the heating element heating means. And a second object to be heated placing means, and first and second power supply ports provided on the wall surface of the heating chamber for introducing the microwave from the microwave heating means into the heating chamber, Said first cover The hot material placing means is disposed above the heating chamber, the second heated object placing means is disposed below the heating chamber, and the first power feeding port is placed on the first heated object placement. Provided on the wall surface of the heating chamber above the placing means, and the second feeding port is provided on the wall surface of the heating chamber below the second heated object placing means.

With the above configuration, even with a microwave heating apparatus that performs dielectric heating with microwaves by heating the object to be heated with two object-to-be-heated object mounting means having a heating element heating means constituted by a microwave heating element. With a simple configuration, it becomes possible to burn or darken both sides of the object to be heated. Further, when heating is performed only by microwave dielectric heating alone, two heating object placing means can be removed to prevent microwave loss and efficiently perform dielectric heating. Further, by attaching the heating element heating means above and below the object to be heated without being limited in arrangement, it becomes possible to perform heating that gives a brown color or browning, and the heating distribution can be made uniform. Thus, the efficiency of dielectric heating and the heating performance including the surface color and surface state of the object to be heated can be improved.

  Furthermore, since each object to be heated is not only microwaves from below, but also microwaves from above, microwaves are transmitted through the substrate, so the microwave heating element reliably absorbs microwaves. To do. In addition, since the microwaves that have come off the heating element heating means reach the heating element heating means while being reflected by the metal cover of the object-to-be-heated object mounting means, a sufficient calorific value can be obtained.

  The object-to-be-heated object mounting means and the microwave heating apparatus using the same according to the present invention provide a heating means in place of a heater whose arrangement in the heating chamber is limited, thereby warming food only by dielectric heating. Microwave loss can be prevented, and the food can be heated to give food texture and flavor by baking or scorching on both sides of the food, improving the efficiency of dielectric heating and improving the heating performance including the surface color and surface condition of the object to be heated Improvements can be made.

Side surface sectional drawing which shows schematic structure in the microwave heating device of Embodiment 1 which concerns on this invention Front sectional drawing in the AA section of Drawing 1 in the microwave heating device of Embodiment 1 concerning the present invention. Detailed sectional drawing which shows the to-be-heated material mounting means of Embodiment 1 which concerns on this invention 1 is an external view of a display / operation panel in the microwave heating apparatus according to the first embodiment of the present invention. The flowchart which shows operation | movement of the user at the time of a driving | operation in the microwave heating device of Embodiment 1 which concerns on this invention, and a control part. Sectional view of a conventional microwave heating device with upper and lower heaters

  1st invention is the to-be-heated object mounting means which can mount a to-be-heated object for using in the heating chamber where a microwave is irradiated by the microwave heating means in the state which accommodated the to-be-heated object, It is composed of a base using a radio wave-transmitting non-metallic material that occupies substantially the entire area of the heating chamber plane, and is formed on a part of the lower surface of the base to absorb the microwave irradiated by the microwave heating means. A heating element heating means constituted by a microwave heating element that generates heat, and a metal cover formed on a lower surface portion of the lower surface of the substrate other than the heating element heating means.

  According to the present invention, among the microwaves irradiated from below the object-to-be-heated object placing unit, those directly reaching the heating unit heating unit absorb the microwaves and generate heat. On the other hand, since the portion excluding the heating element heating means on the lower surface of the heated object placing means is provided with a metal cover, the microwaves that are outside the heating element heating means are reflected between the metallic cover and the wall of the heating chamber. As a result, it reaches the heating element heating means, and the heating element heating means reliably absorbs the microwave and can obtain a sufficient calorific value. In addition, when microwaves are irradiated from above the object-to-be-heated mounting means, it is configured to have a microwave heating element on a radio wave-transmitting plate or the lower surface of the base, so that the object-to-be-heated mounting means Even if the microwave is from above, the microwave passes through the substrate. And even if the microwave heating element that has passed through is removed from the heating element heating means, it is reflected by the metallic cover and reaches the heating element heating means in the same way as from below, so that the microwave heating element is surely A sufficient amount of heat can be obtained by absorbing microwaves. Therefore, the grill cooking which makes a burning color or a burnt color is realizable by attaching a to-be-heated material mounting means.

  According to a second aspect of the present invention, there is provided a heating chamber for storing an object to be heated, microwave heating means for irradiating the object to be heated stored in the heating chamber with microwaves, and radio wave transmission that occupies substantially the entire area of the heating chamber plane. Heat generated by a microwave heating element that is formed on a part of the lower surface of the substrate and that absorbs microwaves generated by the microwave heating means and generates heat. Body heating means, first and second object-to-be-heated placing means provided with a metal cover formed on a lower surface portion of the lower surface of the substrate other than the heating element heating means, and the microwave In order to introduce microwaves from the heating means into the heating chamber, the first and second power supply ports provided on the wall surface of the heating chamber are provided, and the first object-to-be-heated placing means is provided in the heating chamber. Arranged above the second The heated object mounting means is disposed below the heating chamber, the first power supply port is provided on the wall surface of the heating chamber above the first heated object mounting means, and the second power supply port Is provided on the wall surface of the heating chamber below the second heated object placing means.

  According to the present invention, dielectric heating by microwaves is performed by sandwiching and heating food to be heated with two heated object mounting means having heating element heating means constituted by microwave heating elements. Even with a microwave heating device, the both sides of the food can be baked and burnt with a simple configuration, and a texture and flavor such as a crispy feeling can be imparted to the food. In addition, when food is heated only by dielectric heating with microwaves alone, two high-temperature heating elements such as heaters, which are likely to cause microwave loss, are arranged in the heating chamber by removing the two objects to be heated. In this case, dielectric heating can be performed efficiently, and conversely, the arrangement of the upper and lower heaters in the heating chamber is not limited by the microwave supply parts, and the two heated object mounting means are attached to perform baking. The grill can be cooked in color or burnt, and the heating distribution can be made uniform by the heating element heating means that is not limited in arrangement.

  Further, since the two heated object mounting means are configured to have a microwave heating element on the lower surface of the radio wave transmitting base, each heated object mounting means can of course receive microwaves from below. Even if the microwave is from above, the microwave is transmitted through the substrate, so that the microwave heating element reliably absorbs the microwave and can obtain a sufficient calorific value. And since the part excluding the heating element heating means covers the substantially entire area of the heating chamber plane, of the lower surface of the heated object placing means occupying substantially the entire area of the heating chamber plane, The microwaves that have come off the heating element heating means are reflected by the metal cover provided on the heated object placing means and the wall surface of the heating chamber and reach the heating element heating means. Therefore, microwaves that are not absorbed by the heating element heating means but go around the back surface and are absorbed by the food can be prevented and suppressed. This prevents the feeling and flavor from being impaired and improves the heating performance of the object to be heated and the cooking performance of the food.

  In particular, the third invention has a plurality of microwave heating means of the second invention, the first microwave heating means connected so as to be able to irradiate microwaves from the first feeding port, And a second microwave heating means connected so as to be able to irradiate microwaves from the second power supply port, thereby providing a first heated object placing means above the heated object and a second lower heating means. Each heating element heating means of the object to be heated is surely irradiated with microwaves to generate heat, and each heat generation amount can be individually set and controlled. Since heating control is possible, the heating performance of the object to be heated and the cooking performance of the ingredients are improved.

In particular, according to a fourth invention, in any one of the second and third inventions, at least one of the first heated object mounting means and the second heated object mounting means is arranged. Because the control means can determine the presence or absence of the heating element heating means based on the output signal of the arrangement detection means, the heating element heating means It is possible to notify the user of the heating pattern to be baked, such as grill cooking, which can be performed by the heating element heating means, by a notifying means such as a display means or a sound means. Thereby, the user can easily select a cooking mode having a different texture or baking color according to his / her preference.

  According to a fifth aspect of the invention, particularly in the fourth aspect of the invention, a heating mode selection unit capable of selecting and setting a pattern for heating the object to be heated from a plurality, and a control unit for controlling heating based on the setting of the heating mode selection unit, And the control means is based on an output signal of the arrangement detection means, and is based on at least one of the first heated object placing means and the second heated object placing means. When it is judged that there is a heating, the selection of the dielectric heating single heating mode for the object to be heated is prohibited. Even if the means is placed in the heating chamber, the control means discriminates the presence or absence of the heating element heating means, and if there is at least one object-to-be-heated placing means in the heating chamber, the heating selection is prohibited. The user of misuse, such as incorrect heating pattern fails to cooking in progress can be prevented.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments according to a heated object placing unit and a microwave heating apparatus using the same will be described with reference to the accompanying drawings. In the microwave heating apparatus of the following embodiment, a description will be given using a heating cooker. However, the heating cooker is an example, and the microwave heating apparatus of the present invention is not limited to the heating cooker. And includes a heating device using dielectric heating which is microwave heating. Therefore, the present invention is not limited to the specific configurations of the following embodiments, but includes configurations based on the same technical idea.

(Embodiment 1)
As a first embodiment according to the present invention, a heating cooker in a heated object placing means and a microwave heating apparatus using the same will be described.

  1 is a side sectional view showing a schematic configuration of a heating cooker as a microwave heating apparatus according to a first embodiment of the present invention.

  In FIG. 1, the heating cooker according to the first embodiment includes a casing 10, a door 11, and a display / operation panel 12, and a food that is an object to be heated is provided inside the casing 10 that forms the appearance of the heating cooker. 14 is provided with a heating chamber 15 for performing dielectric heating (microwave heating) or heating cooking to burn or burn. That is, in the heating chamber 15, the food 14 that is the object to be heated is stored, and microwaves are radiated to the food 14 to be microwave-heated.

A power feeding chamber 16 is provided in the vicinity of the center of the ceiling wall surface of the heating chamber 15 formed of a steel plate. Inside the power feeding chamber 16, an upper power feeding portion 17 of a rotating antenna as a radio wave agitating means is disposed. . The wall surface of the power supply chamber 16 is made of a material that reflects the microwave radiated from the upper power supply unit 17, and has a shielding structure so that the microwave does not leak outside the power supply chamber 16. The upper feeding portion 17 of the rotating antenna is provided so as to be led out from a first feeding port 19 formed in the upper waveguide 18 and serving as a coupling hole. The upper waveguide 18 transmits the microwave from the upper magnetron 20 which is a microwave heating means to the upper power feeding unit 17. The upper magnetron 20 generates microwaves for microwave heating of the food 14 that is the object to be heated in the heating chamber 15. The microwave transmitted to the upper power feeding unit 17 is radiated into the heating chamber 15. The upper magnetron 20 is disposed at the right end (see FIG. 1) of the upper waveguide 18 disposed on the top surface side of the heating chamber 15, and the upper magnetron 20 is an oscillation antenna of the upper magnetron 20. The upper magnetron output unit 21 is inserted upward. The first power supply port 19 formed in the horizontal portion of the upper waveguide 18 is provided with an upper power supply unit 17 that is a rotating antenna. The upper power feeding unit 17 includes a flat plate element 22a and a vertical axis element 22b. The vertical axis element 22 b of the upper power feeding unit 17 is connected to the motor 23. By driving the motor 23, the vertical axis element 22b
Is rotated, and the flat element 22a rotates. The upper feeding unit 17 is coupled to the horizontal transmission path of the upper waveguide 18, and the microwave transmitted through the upper waveguide 18 is radiated into the heating chamber 15 by the flat plate element 22 a of the upper feeding unit 17.

  A cylindrical power supply chamber 16 that houses the rotating flat plate element 22a is provided in the approximate center of the ceiling wall surface of the heating chamber 15. A first power supply port 19 formed on the lower surface of the horizontal portion of the upper waveguide 18 is connected to an opening formed at the upper end of the power supply chamber 16 and functions as a coupling hole. The coupling portion between the waveguide 18 and the upper feeding portion 17 has a predetermined diameter as a feeding port.

  As shown in FIG. 1, a cover 24 is provided at an opening that is a lower end of the power supply chamber 16 on the ceiling wall surface of the heating chamber 15. The cover 24 is made of mica and is provided so that dirt or the like scattered from the food in the heating chamber 15 does not adhere to the flat plate element 22a or the like of the upper power feeding unit 17. The cover 24 has been described with an example using mica, which is a low-loss dielectric material. However, the cover 24 is not limited to mica, and the same effect can be obtained by using a material such as ceramic or glass.

  On the other hand, near the center of the bottom surface of the heating chamber 15, a lower feeding portion 26 of the rotating antenna as a radio wave agitating unit is disposed. The lower feeding portion 26 of the rotating antenna is provided in the lower waveguide 27 so as to be led out from a second feeding port 28 which is a coupling hole. The lower waveguide 27 transmits the microwave from the lower magnetron 29 which is a microwave heating means to the lower power feeding unit 26. The lower magnetron 29 generates microwaves for microwave heating of the food 14 that is the object to be heated in the heating chamber 15. The microwave transmitted to the lower power feeding unit 26 is radiated into the heating chamber 15. The lower magnetron 29 is disposed at the right end (see FIG. 1) of the lower waveguide 27 disposed on the bottom surface side of the heating chamber 15, and is an oscillation antenna of the lower magnetron 29 with respect to the lower waveguide 27. A certain lower magnetron output unit 30 is inserted downward. A dish pedestal 31 provided on the entire lower surface of the heating chamber with a plate made of a microwave transmitting material is provided just above the lower power feeding portion 26 in the heating chamber 15 with a clearance from the rotating antenna. When the food is cooked by only microwave dielectric heating, the food 14 can be directly placed on the tray support 31.

  2 is a front cross-sectional view taken along the line AA of FIG. 1 in the heating cooker according to the first embodiment, and FIG. 3 is a detailed cross-sectional view showing the heated object placing means according to the first embodiment of the present invention. .

  As shown in FIGS. 1 to 3, the inside of the heating chamber 15 is composed of a base body using a radio wave transmissive non-metallic material, and occupies substantially the entire area of the cross-sectional area obtained by cutting the heating chamber 15 along a horizontal plane. The first grill pan 34, which is the first heated object placing means, and the second grill pan 35, which is the second heated object placing means, are configured in the same manner. Yes.

  The bases of the two first grill pans 34 and the second grill pan 35 are formed as plate-shaped or dish-like bodies, and are formed as square plates with edges made of ceramic with a small dielectric loss, thereby allowing radio waves to be generated. A heating element heating means 36 constituted by a microwave heating element that is transparent and absorbs the microwave irradiated into the heating chamber 15 to generate heat is provided on the lower surface thereof.

  A metal cover 39 formed by drawing a metal plate on a portion of the lower surface of each of the first grill pan 34 and the second grill pan 35 where the ceramic other than the heating element heating means 36 is exposed. Is fixed by screws 40 and covers the ceramic portion on the lower surface to have radio wave reflectivity. The first grill pan 34, which is the first object-to-be-heated placement means disposed above, is placed on the first placement means 37 in which the left and right side wall surfaces of the heating chamber 15 are formed into a shelf shape. It arrange | positions at the ceiling wall surface side (upper side) of the heating chamber 15 so that attachment or detachment is possible.

  On the other hand, the second grill pan 35 which is a second object-to-be-heated placing means arranged below is a second grille shaped like a first arranging means 37 in which the left and right side walls of the heating chamber 15 are formed into a shelf shape. Is placed on the bottom surface side (lower side) of the heating chamber 15 so as to be detachable.

  The two first grill pans 34 and the second grill pan 35 have the same configuration and the same shape, and are the same heated object mounting means that can replace the two. By placing the food 14 as the object to be heated on the first grill plate 34 or the second grill plate 35 having a square plate shape, the food can be arranged at a desired height in the heating chamber 15. .

  The heating element heating means 36 provided on the first grill pan 34 and the second grill pan 35 uses ferrite powder or the like as a magnetic material, and this magnetic material is contained in a binder made of an organic compound such as silicone rubber to form a composite composition. We use what was made.

  Since silicone rubber is excellent in dispersibility with ferrite powder, a large amount of ferrite powder is contained to achieve high heat generation performance. Moreover, high heat resistance and excellent chemical resistance are expressed by crosslinking silicone rubber with a crosslinking agent.

  The heating element heating means 36 adheres the microwave heating material to the lower surfaces of the first grill plate 34 and the second grill plate 35 by hot pressing with a press machine or the like using the microwave heating material thus configured. It is arranged in the integrated configuration.

  The food 14 to be heated, which is placed on the second grill plate 35, is immediately heated by the heating element heating means 36 on the back surface and the heating element heating means 36 on the lower surface of the first grill plate 34 above. It is sandwiched and heated from above and below.

  The food 14 is heated from the back surface of the second grill pan 35 by conduction heat, and the food 14 is heated from the bottom surface of the first grill pan 34 mainly by radiant heat from the heating element heating means 36.

  In the heating cooker according to the first embodiment, the first grill pan 34 and the second grill pan 35 are provided with a plurality of shelves in the heating chamber 15 to form a plurality of stages of arrangement means. You may make it the structure which can mount | wear to a desired position the space | interval of an up-down direction.

  In the heating cooker according to the first embodiment configured as described above, the bottom surface of the first grill pan 34 having a microwave dielectric heating section as one heating means and mounted as another heating means. And a high-temperature heating section for radiant heat, conduction heat, and convection heat by the heating element heating means 36 on the lower surface of the second grill pan 35.

  As described above, the heating cooker according to Embodiment 1 includes the dielectric heating unit and the detachable high-temperature heating unit, thereby performing desired heating cooking on the food 14 that is the object to be heated in the heating chamber 15. It is.

  Inside the heating chamber 15, the heating element heating means 36 on the lower surface of the first grill pan 34 that heats the food 14 that is the object to be heated from above is opened on the top surface of the power supply chamber 16 on the ceiling wall surface of the heating chamber 15. It arrange | positions under the 1st electric power feeding port 19 to do.

  That is, the heating element 36 of the first grill pan 34 has passed through the ceramic material of the first grill pan 34 by the microwave radiated from the upper feed section 17 which is a rotating antenna in the power feed chamber 16. Absorbs waves and generates heat.

  On the other hand, the heating element heating means 36 on the lower surface of the second grill pan 35 that heats the food 14 from below inside the heating chamber 15 is a tray receiver above the second power supply opening 28 that opens to the bottom surface of the heating chamber 15. It is arranged further above the table 31. That is, the heating element 36 on the lower surface of the second grill pan 35 is directly irradiated with the microwave radiated from the lower power feeding unit 26 that is a rotating antenna at the bottom of the heating chamber 15 to absorb the microwave, Fever.

  In FIG. 2, in the vicinity of the first arrangement means 37 and the second arrangement means 38 on the left side wall of the heating chamber 15, the heights of the edges of the first grill plate 34 and the second grill plate 35 are respectively set. A thin rod-shaped detection pin 41 made of an insulating material is arranged. The detection pin 41 is urged by a spring (not shown) and protrudes from the side wall of the heating chamber 15, and the first grill pan is placed on either the first arrangement means 37 or the second arrangement means 38. When the 34 or the second grill pan 35 is placed and placed at a predetermined position, the detection pin 41 is pushed out of the heating chamber 15.

  In this way, when the detection pin 41 is pushed out, the contact is closed, and the two arrangement detection switches 42 that can detect the presence / absence of the arrangement of the first grill pan 34 and the second grill pan 35 are provided in the heating chamber 15. Is provided as an arrangement detecting means on the outside of the left side wall.

  The arrangement detection switch 42 is electrically connected together with the display operation panel 12 to a control unit 46 which is a control means in the vicinity of the display operation panel 12 shown in FIG. Therefore, the control unit 46 receives the signal output from the arrangement detection switch 42 and determines the presence or absence of the two first grill pans 34 and the second grill pan 35. If there are grill pans, the grill pan is the heating chamber. 15 is configured to be notified using a display unit 51 and a sound generation unit 47 described later.

  Further, the control unit 46 is configured to select and set the heating mode of the food 14 to be heated by the display / operation panel 12, and to control the heating time and the heating output. When there is a grill pan, dielectric heating is performed. Is configured to prohibit the selection setting of the individual heating operation by the user and to inform the user why the selection setting of the dielectric heating operation is prohibited and how to deal with it.

  FIG. 4 is an external view of the display operation panel 12 in the cooking device of the first embodiment. In FIG. 4, the display operation panel 12 includes a display unit 51 using liquid crystal or the like, a dial operation unit 52 which is a heating mode selection means for selecting a heating mode and a heating time, and a start key for starting a heating operation. 53, a cancel key 54 for stopping the heating operation is provided.

  About the cooking-by-heating machine comprised as mentioned above, the basic operation | movement and an effect | action are demonstrated below. FIG. 5 is a flowchart showing the operation of the user and the control unit 46 when operating the heating cooker according to the first embodiment.

  Hereinafter, the operation of the control unit 46 when the user cooks food using the heating cooker according to the present embodiment will be described with reference to FIG.

  First, when the user heats the food 14 by dielectric heating alone, the user opens the door 11 and removes the first grill pan 34 and the second grill pan 35 if they are in the heating chamber 15. Then, after placing the food 14 directly on the tray holder 31, the operation of the display operation panel 12 is started.

The control unit 46 waits until the user operates the dial operation unit 52 and other keys as the operation starts (step S101). Here, a door opening / closing detection means may be provided to detect the user's door operation and determine the start of use.

  In step S101, when the user performs some operation input and determines that the use of the heating cooker is started, the arrangement detection switch 42 causes the two first grill dishes 34 and the second grill dishes 35 to be The presence or absence is detected (S102).

  Then, the control unit 46 determines that both the first grill pan 34 and the second grill pan 35 are not in the heating chamber 15 based on the output signal of the arrangement detection switch 42 (S103).

  When the user turns the dial operation unit 52 and selects heating because of a plurality of heating modes and then sets the heating time (S104), the control unit 46 determines the heating mode and conditions (S105). When the start key 53 is pressed (S106), heating is started while the operation is controlled to a predetermined condition by the control unit 46 (S107).

  When the set time elapses, the user is notified that the heating is completed using the display unit 51, the sound generation unit 47, and the like (S108), and the operation is completed.

  On the other hand, if the user forgets to take out either the first grill plate 34 or the second grill plate 35 from the heating chamber 15, the control unit 46 outputs the output of the arrangement detection switch 42 in step S103. Based on the signal, it is determined that one or both of the two first grill pans 34 and the second grill pan 35 are in the heating chamber 15. Then, the control unit 46 sets the heating selection to be prohibited because it is a heating mode of dielectric heating alone (S109).

  Therefore, even if the user turns the dial operation unit 52 and tries to select heating because of a plurality of heating modes (S110), since the selection is prohibited, the next heating time setting is not possible because the selection is prohibited. (S111).

  When either one of the first grill pan 34 and the second grill pan 35 serving as the object to be heated is provided, if the user tries to select heating by the dial operation unit 52, the control means The control unit 46 notifies that the grill pan is in the heating chamber 15 using the display unit 51 and the sound generation unit 47 (S112).

  Thus, the user can understand why the heating operation cannot be selected because it means dielectric heating alone, and how to deal with it.

  Next, a case where the user performs grill heating of the food 14 by the heating element heating means 36, which is one of high-temperature heating, will be described. When the user heats the food 14 to grill or burn it, the user opens the door 11 and puts the food 14 on the second grill plate 35 to which the heating element heating means 36 is bonded. Put it in the heating chamber 15. The first grill pan 34 is not used when it is sufficient to color the food 14 on one side.

  On the other hand, when both sides of the food 14 are to be colored simultaneously, the second grill plate 35 on which the food 14 is placed is set on the second arrangement means 38 in the heating chamber 15 and the first grill plate 34 is also provided. After being set in the heating chamber 15 so as to be placed on the first arrangement means 37, the operation of the display operation panel 12 is started.

  The control unit 46 waits until the user operates the dial operation unit 52 and other keys as soon as the operation starts (S101). In step S101, when the user inputs some operation and determines that the use of the heating cooker is started, the arrangement detection switch 42 determines whether or not the two first grill plates 34 and the second grill plate 35 are present. Detect (S102).

  Based on the output signal of the arrangement detection switch 42, the control unit 46 determines that either the first grill pan 34 or the second grill pan 35 is in the heating chamber 15 (S103). Then, the control unit 46 sets the heating selection to be prohibited because it is a heating mode of dielectric heating alone (S109).

  When the user turns the dial operation unit 52 and selects grill heating from a plurality of heating modes (S110), the heating time is not set (S111), so the heating time can be set as it is.

  Then, the control unit 46 determines the heating mode and conditions (S105), and when the user presses the start key 53 (S106), grill heating is started while the operation is controlled to a predetermined condition by the control unit 46 (S107). ).

  When the set time elapses, the user is notified that the heating is completed using the display unit 51, the sound generation unit 47, and the like (S108), and the operation is completed.

  In the heating cooker according to the first embodiment, the first grill plate 34 or the second grill plate 35 is mistakenly placed in the heating chamber 15 when the user wants to heat because it means dielectric heating alone. If it is inserted, the microwaves irradiated from the upper magnetron 20 and the lower magnetron 29, which are microwave heating means, are absorbed by the microwave heating element, so that it is sufficiently heated to a necessary temperature for a predetermined heating time. Can not be.

  In addition, unnecessary baking color or burning may occur due to the heating element heating means 36 on the lower surface of the first grill pan 34 or the second grill pan 35. However, since the arrangement detection switch 42 as the arrangement detection means is provided, the control unit 46 as the control means determines whether the first grill plate 34 and the second grill plate 35 are present based on the output signal of the arrangement detection switch 42. Since it can be discriminated, a heating pattern that gives a grilled color such as the presence of the grill pan in the heating chamber 15 when it is determined that there is a grill pan or grill cooking possible by the first grill pan 34 and the second grill pan 35 Can be notified to the user by a notification means such as the display unit 51 or the sound generation unit 47.

  Thereby, the user can easily select a cooking mode having a different texture or baking color according to his / her preference.

  In the heating cooker according to the first embodiment, when the user wants to heat by heating, the first grill plate 34 and the second grill plate 35 which are the object to be heated are erroneously placed in the heating chamber 15. Even if it is put in, the controller 46 discriminates the presence or absence of the first grill pan 34 and the second grill pan 35, and if there is at least one grill pan in the heating chamber 15, the heating option is selected. Therefore, it is possible to prevent misuse of the user, such as failure of cooking due to an incorrect heating pattern.

In the heating cooker of the first embodiment, the upper magnetron 20 and the lower magnetron 29 that irradiate the microwave into the heating chamber 15, and the microwave heating element that absorbs the microwave irradiated in the heating chamber 15 and generates heat. The first grill plate 34 and the second grill plate 35, which are the object to be heated, are bonded to the heating element heating unit 36 constituted by the above. The first arrangement unit 37 is provided above the heating chamber 15. The first grill pan 34 as the first object to be heated is disposed, and the second grill pan as the second object to be heated is disposed below the heating chamber 15 by the second disposition means 38. 35, and the microwave of the upper magnetron 20 is irradiated from the first power supply port 19 above the first grill plate 34, and from the second power supply port 28 below the second grill plate 35. Of lower magnetron 29 By being configured to irradiate the microwave, the food 14 is sandwiched and heated by the two first grill pans 34 and the second grill pan 35 having the heating element heating means 36 constituted by a microwave heating element. become.

  Therefore, even in a microwave heating apparatus that only performs dielectric heating by microwave irradiation, food can be simply configured with two heated object mounting means having a microwave heating element that has been heated to high temperature by microwave irradiation. 14 can be baked or burnt on both sides, and a food texture and flavor such as a crispy feeling can be given to the food.

  Further, when the food 14 is warmed only by the dielectric heating only with the microwave alone, by removing the two first grill plates 34 and the second grill plate 35, such as a heater that easily causes a loss of microwaves. Since the high-temperature heating element is not disposed in the heating chamber 15, dielectric heating can be performed efficiently, and conversely, the arrangement of the upper and lower heaters in the heating chamber is not limited by the microwave supply parts.

  Then, by attaching the two first grill pans 34 and the second grill pan 35, grill cooking with a brown color or dark brown can be realized, and the heating distribution can be made uniform by the heating element heating means which is not limited in arrangement.

  And in the 1st grill pan 34 and the 2nd grill pan 35 which are to-be-heated material mounting means, what reached directly to the heating element heating means 36 among the microwaves irradiated from the downward direction is heating element heating. The means 36 absorbs the microwave and generates heat.

  On the other hand, a portion of the first grill pan 34 and the second grill pan 35 excluding the heating element heating means 36 is provided with a metal cover. It is reflected between the wall surfaces of the heating chamber and reaches the heating element heating means 36, so that the heating element heating means 36 can reliably absorb the microwave and obtain a sufficient calorific value.

  Further, when microwaves are irradiated from above the object to be heated (grill plate), the microwave heating element is provided on the lower surface of the radio wave transmitting base with a small dielectric loss. Even if the microwave is from above the heated object placing means, the microwave is transmitted through the substrate.

  And even if the microwave heating element 36 that has passed through is removed from the heating element 36, it is reflected by the metallic cover and reaches the heating element heating element 36 in the same manner as from below, so that the microwave heating element A microwave can be absorbed reliably and a sufficient calorific value can be obtained.

  Therefore, the grill cooking which makes a burning color or a burnt color is realizable by attaching a to-be-heated material mounting means.

  Furthermore, since the first grill pan 34 and the second grill pan 35 which are the two heated object placing means are configured to have the microwave heating element on the lower surface of the radio wave transmitting base, The object to be heated is not only microwaves from below, but also microwaves from above, because the microwaves are transmitted through the substrate, so the microwave heating element reliably absorbs the microwaves and is sufficient. Can generate a large amount of heat.

  Of the lower surfaces of the first grill pan 34 and the second grill pan 35 occupying substantially the entire area of the heating chamber plane, a portion excluding the heating element heating means 36 is provided with a metal cover so that the heating chamber plane is substantially omitted. Since the entire area is covered, the microwaves that have deviated from the heating element heating means 36 are reflected by the metal covers of the first grill plate 34 and the second grill dish 35 and the wall surface of the heating chamber to be heated by the heating element heating means 36. Will reach.

  Therefore, the microwaves that are not absorbed by the heating element heating means 36 but go around the back surface and are absorbed by the food 14 can be prevented and suppressed. This prevents the food texture and flavor from being damaged, and improves the heating performance of the object to be heated and the cooking performance of the food.

  Since the second grill pan 35 disposed below can form a dish-shaped heating tray having heating element heating means, the oil dripping from the object to be heated scatters dirt in the microwave heating device, or the lower heater It becomes possible to prevent smoke and fire from being generated by dripping.

  Further, since the first grill pan 34 and the second grill pan 35 are the same in the upper and lower directions, the number of parts is reduced during manufacturing, management is facilitated and the cost can be reduced. Since the upper and lower parts are the same, the wrong mounting due to the misplacement of the upper and lower grill pans is prevented, and even if the user uses the upper and lower sides upside down, the microwaves are absorbed by the heating element heating means through the base, so the calorific value This makes it possible to cook with grilling and improve ease of use.

  In the heating cooker according to the first embodiment, the upper magnetron 20 and the lower magnetron 29 are provided as microwave heating means, and the upper magnetron 20 is connected so that microwaves can be irradiated from the first power supply port 19. Since the lower magnetron 29 is connected so as to be able to irradiate microwaves from the second power supply port 28, the first grill plate 34 above the food 14 which is the object to be heated and the second grill plate below. The heating amount of each heating element heating means 36 of 35 can be individually set and controlled by the control unit 46, and the precise heating control to obtain a desired baked color or darkness can be performed. The cooking performance of food is improved.

  In addition, in the heating cooker of Embodiment 1, although the structure which has the two 1st electric power feeding ports 19, the 2nd electric power feeding port 28, the two upper magnetrons 20, and the lower magnetron 29 was demonstrated, upper and lower two electric power feeding A configuration (not shown) in which an upper waveguide and a lower waveguide are branched from a waveguide provided with a magnetron by a combination of a mouth and one magnetron.

  In this case, by optimizing the size and amount of the heating element heating means 36 included in the first grill pan 34 and the second grill pan 35, the upper and lower heat generation amounts can be set to suitable ratios. Therefore, the same effects as those of the first embodiment are obtained.

  As described above, as described in Embodiment 1, in the microwave heating apparatus of the present invention, the microwave heating means for irradiating microwaves from above and below and the first and second power supply ports are provided in the heating chamber. Heating the grill pan, which is a first and second object-to-be-heated object mounting means, which is composed of a base using a non-metallic material that transmits radio waves and occupies substantially the entire area of the heating chamber plane Heating element heating means arranged on the upper and lower sides of the two upper and lower grill pans is provided with heating element heating means that are arranged above and below the room and are composed of microwave heating elements that generate heat by absorbing microwaves irradiated in the heating chamber. By installing a metal cover on the lower surface of the grill pan other than the means so that microwaves can be applied to the heating element heating means from the upper and lower power supply ports, the two objects to be heated heated by the microwaves can be mounted. Cover Will be heated across the thermophysical, in a microwave heating apparatus for induction heating by microwave, it is possible to give a browned or browning on both sides of the object to be heated in a simple configuration.

  Further, when heating is performed only by microwave dielectric heating alone, two heating object placing means can be removed to prevent microwave loss and efficiently perform dielectric heating. And by attaching two to-be-heated object mounting means, arrangement | positioning is not restrict | limited, the heating which can be baked or burnt is attained, and a heating distribution can be made uniform. Thus, the efficiency of dielectric heating and the heating performance including the surface color and surface state of the object to be heated can be improved.

  As described above, the object-to-be-heated object placing means and the microwave heating apparatus using the same according to the present invention include a cooking device, particularly an oven, a grill, an overheated steam, etc. In addition to heating cookers used in combination with other heating, it is useful for applications such as microwave heating apparatuses in various industrial applications such as drying apparatuses and heating apparatuses for ceramics.

14 Food (to be heated)
15 Heating chamber 19 First feeding port 20 Upper magnetron (microwave heating means)
28 Second feeding port 29 Lower magnetron (microwave heating means)
34 First grill pan (first heated object placing means)
35 Second grill pan (second heated object placing means)
36 Heating element heating means 39 Metal cover 42 Arrangement detection switch (arrangement detection means)
46 Control unit (control means)
52 Dial operation section (heating mode selection means)

Claims (5)

A heated object placing means for placing an object to be heated for use in a heating chamber in which microwaves are irradiated by the microwave heating means in a state in which the object to be heated is accommodated,
It is composed of a base using a radio wave-transmitting non-metallic material that occupies substantially the entire area of the heating chamber plane, and is formed on a part of the lower surface of the base to absorb the microwave irradiated by the microwave heating means. A heating element heating means constituted by a microwave heating element that generates heat,
A heated object placing means comprising a metal cover formed on a lower surface portion of the lower surface of the substrate other than the heat generating element heating means. A heating chamber for storing an object to be heated;
Microwave heating means for irradiating microwaves to an object to be heated stored in the heating chamber;
It is composed of a base using a radio wave-transmitting non-metallic material that occupies substantially the entire area of the heating chamber plane, and is formed on a part of the lower surface of the base to absorb the microwave irradiated by the microwave heating means. First and second provided with a heating element heating means constituted by a microwave heating element that generates heat, and a metal cover formed on a lower surface portion of the lower surface of the base other than the heating element heating means. A heated object placing means,
In order to introduce the microwave from the microwave heating means into the heating chamber, the first and second feeding ports provided on the wall surface of the heating chamber,
The first object-to-be-heated placing means is disposed above the heating chamber,
The second object-to-be-heated placing means is disposed below the heating chamber,
The first power supply port is provided on the wall surface of the heating chamber above the first heated object placing unit, and the second power supply port is located below the second heated object placing unit. A microwave heating device provided on a wall surface of the heating chamber. A plurality of the microwave heating means, a first microwave heating means connected so as to be able to irradiate microwaves from the first power supply port, and a microwave can be irradiated from the second power supply port The microwave heating device according to claim 2, further comprising: a second microwave heating unit connected to the device. 4. The micro of claim 2, further comprising an arrangement detecting unit that detects the presence / absence of at least one of the first heated object placing unit and the second heated object placing unit. Wave heating device. A heating mode selection means capable of selecting and setting a pattern for heating the object to be heated from a plurality of; and a control means for controlling heating based on the setting of the heating mode selection means, wherein the control means is an output of the arrangement detection means. Based on the signal, when it is determined that there is at least one object-to-be-heated placing means out of the first object-to-be-heated placing means and the second object-to-be-heated placing means, the dielectric to the object to be heated The microwave heating apparatus according to claim 4, wherein selection of the heating single heating mode is prohibited.