JP3637288B2 - Cooker - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention includes high-frequency heating that heats food by oscillating high-frequency generated from the magnetron from the bottom of the heating chamber to the heating chamber, and heater heating that efficiently heats the food in the heating chamber with the radiant heat of the heater and hot air. It relates to a cooking device.
[0002]
[Prior art]
A conventional cooking device will be described with reference to FIG.
[0003]
1 is food. Reference numeral 2 denotes a heating chamber for storing the food 1, and the front surface is opened for taking in and out the food 1. Reference numeral 3 denotes an upper heater provided in the upper part of the heating chamber 2.
[0004]
Reference numeral 4 denotes a hot air device provided on the rear outer surface of the heating chamber 2, and a casing 4 c, a hot air heater 4 a provided on the upper side in the casing 4 c, a fan 4 b provided on the lower side, and the heating chamber 2. It consists of a hot air blown out and a guide 4 d that partitions the air path of the hot air returning from the heating chamber 2.
[0005]
Reference numeral 5 denotes a blower hole provided in the rear wall surface of the heating chamber 2, which is a hole for blowing hot air from the hot air device 4 into the heating chamber 2. Reference numeral 6 denotes an air intake hole provided on the rear wall surface of the heating chamber 2 for returning the hot air circulated through the heating chamber 2 to the hot air device 4.
[0006]
7 is a dish on which the food 1 is placed when the heater is heated, and is composed of an upper dish 7a provided on the upper side and a lower dish 7b provided on the lower side. 8a is an upper shelf which is provided so as to protrude inside the right and left side surfaces of the heating chamber 2 and fixes the upper plate 7a. 8b is the same shape as the upper shelf 8a, and is a lower shelf which fixes the lower tray 7b.
[0007]
Reference numeral 9 denotes a plate-like planar dielectric on which the food 1 is placed directly during high-frequency heating, or a tableware (not shown) containing the food 1 is placed on the bottom surface of the heating chamber 2. .
[0008]
A magnetron 10 generates a high frequency. Reference numeral 11 denotes a rotating antenna that diffuses high frequency so that the high frequency in the heating chamber 2 is uniform. A motor 12 rotates the rotating antenna.
[0009]
Reference numeral 13 denotes an air gap, which includes a rotating antenna 11, whose upper surface shares the dielectric 9 on the bottom surface of the heating chamber 2, and whose lower surface is covered with a metal plate 13 a that blocks high frequency. Reference numeral 14 denotes a waveguide portion to which the magnetron 10 is fixed and guides the high frequency generated from the magnetron 10 to the gap 13. Reference numeral 15 denotes a power supply port, which is provided in the waveguide portion 14 and the air gap 13 so as to pass a high frequency. Reference numeral 17 denotes a door that opens and closes the front opening of the heating chamber 2.
[0010]
In this way, the reason why the bottom surface of the heating chamber 2 is made the dielectric 9 and the high frequency of the magnetron 10 is radiated from the lower portion of the heating chamber 2 is that the high frequency is radiated from the bottom of the food 1. This is because the portion on which the food 1 is placed is flat and has good cleaning properties when liquid is spilled.
[0011]
The operation of the conventional example configured as described above will be described.
[0012]
As an example, a case where the food 1 is heated by heater heating will be described.
[0013]
The food 1 is placed on the upper plate 7a and the lower plate 7b, and the upper plate 7a and the lower plate 7b are fixed to the upper shelf 8a and the lower shelf 8b provided in the heating chamber 2, respectively. Start heating after entering from the location.
[0014]
When heating is started, the hot air heater 4a of the hot air device 4 generates heat according to an instruction from a control unit (not shown). At the same time as the hot air heater 4a generates heat, the fan 4b rotates to generate wind. This wind flows along the casing 4 c, heat is transferred from the hot air heater 4 a to become hot air, and blows out into the heating chamber 2 from the blow hole 5 provided in the rear wall surface of the heating chamber 2.
[0015]
Next, the heat generated from the upper heater 3 is absorbed by the upper surface of the food 1 placed on the upper plate 7a.
[0016]
Moreover, the hot air which flowed into the heating chamber 2 flows along the bottom surface of the upper plate 7a and the upper surface of the lower plate 7b. At that time, thermal energy is absorbed by the upper plate 7 a, the lower plate 7 b, and the food 1.
[0017]
The hot air absorbed by the food 1 or the like hits the back surface of the door 17 and is dispersed vertically. Here, since the air blowing holes 5 are provided only below the position of the upper plate 7a, most of the hot air is from the lower plate 7b. It flows in the direction of the bottom.
[0018]
The hot air whose thermal energy has decreased by flowing between the bottom surface of the lower plate 7b and the dielectric 9 flows into the hot air device 4 from the intake hole 6 provided in the rear wall surface of the heating chamber 2, and is again returned to the hot air heater 4a by the fan 4b. The air is blown, heat energy is transmitted by the hot air heater 4a, and is blown out again into the heating chamber 2 as hot air containing the heat energy.
[0019]
In this way, the food 1 was heated with hot air and the radiant heat of the upper heater 3.
[0020]
The operation of the high frequency heating is not directly related to the present invention, and thus the description thereof is omitted.
[0021]
[Problems to be solved by the invention]
In the upper and lower two-stage food heating at the time of heater heating in the conventional example, the upper part of the food 1 in the upper dish 7a is heated by the heat of the upper heater 3 and the lower part is heated by the heat of hot air to finish uniformly.
[0022]
However, in the case of heating the food 1 in the lower tray 7b in the lower stage, the upper part is heated by the heat of hot air, but the lower part is the dielectric 9, metal plate 13a, and waveguide part 14 constituting the lower part of the heating chamber 2. Therefore, there is a problem that the heat energy of the circulating hot air is lost to these parts, and the lower side of the food 1 in the lower dish 7b becomes under-heated and cannot be finished well.
[0023]
For this reason, only the upper plate 7a of the upper stage could be used, and the food 1 could not be heated in two stages.
[0024]
In order to solve such a problem, if the power consumption of the hot air heater 4a is increased to transmit heat to the lower side of the food 1 in the lower tray 7b, the food 1 is burnt in the vicinity of the hot air blowing hole 5. In addition, if it is attempted to secure the wind speed and the air volume, the fan 4b and the like are increased in size, which is impractical for practical use.
[0025]
[Means for Solving the Problems]
In order to solve the above problems, the present invention is arranged in a heating chamber for storing food, an upper heater provided in the upper portion of the heating chamber, a hot air device provided in the rear outer surface of the heating chamber, and the heating chamber. The upper and lower plates on which the upper and lower two-stage foods are placed, the planar dielectric that is provided on the bottom surface of the heating chamber and on which foods can be placed, the magnetron that generates high frequency, It has a rotating antenna that diffuses the high frequency generated from the magnetron into the heating chamber, the top surface shares the dielectric on the bottom surface of the heating chamber, the bottom surface is a space covered with a metal plate, and a guide that guides the high frequency from the magnetron to this space. In the cooking device provided with a wave portion, a lower heater is provided on the outer bottom surface of the metal plate, and the dielectric is heated by the lower heater to supply heat energy to the lower plate.
[0026]
As a result, insufficient heating of the bottom surface of the food placed on the lower plate in the heating chamber can be resolved, and the upper and lower two-stage food can be heated.
[0027]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
[0028]
FIG. 1 is a side sectional view of a heating cooker in one embodiment of the present invention. Reference numerals 1 to 15 and 17 in the figure are the same as those in the conventional example shown in FIG.
[0029]
Reference numeral 16 denotes a lower heater attached to the outer surface of the metal plate 13a on the outer bottom surface of the gap 13, and is composed of, for example, a planar heater or a sheathed heater.
[0030]
Next, the operation of this embodiment having the above configuration will be described.
[0031]
When heating the food 1 using heater heating, first, the food 1 is placed on the upper plate 7a and the lower plate 7b. Next, the door 17 is opened, the upper plate 7a and the lower plate 7b are fixed to the upper shelf 8a and the lower shelf 8b provided in the heating chamber 2, and the heating condition of the food 1 is changed from a predetermined place after the door 17 is closed. Enter and start heating.
[0032]
When heating is started, control is performed so that the heating temperature determined by operating the upper heater 3, the lower heater 16, and the hot air device 4 is set by a program set in a control unit (not shown) in advance.
[0033]
Here, the operation of the hot air device 4 will be described.
[0034]
When the heater heating is started, the hot air heater 4a of the hot air device 4 generates heat according to an instruction from a control unit (not shown). At the same time as the hot air heater 4a generates heat, the fan 4b rotates to generate wind. This wind flows along the casing 4c, heat is transferred from the hot air heater 4a to become hot air, and blows out into the heating chamber 2 from the air blowing holes 5 provided in the rear wall surface of the heating chamber 2.
[0035]
Next, how heat is transferred from each heater to the food 1 will be described.
[0036]
The heat generated from the upper heater 3 is absorbed by the upper surface of the food 1 placed on the upper plate 7a.
[0037]
Further, the hot air generated in the hot air device 4 flows into the heating chamber 2 from the blower holes 5 on the wall surface of the heating chamber 2. The hot air flowing into the heating chamber 2 flows along the bottom surface of the upper plate 7a and the upper surface of the lower plate 7b. At that time, thermal energy is absorbed by the upper plate 7 a, the lower plate 7 b, and the food 1.
[0038]
The hot air absorbed by the food 1 or the like hits the back surface of the door 17 and is dispersed vertically. Here, since the air blowing holes 5 are provided only below the position of the upper plate 7a, most of the hot air is generated in the lower plate 7b. It flows in the direction of the bottom. And the hot air which flowed there no longer has the heat energy which can heat the food 1.
[0039]
Therefore, the heat generated from the lower heater 16 provided at the outer bottom of the gap 13 provided at the bottom of the heating chamber 2 causes the air in the gap 13 to be heated, and the entire dielectric 9 is heated by this heat. Thus, the dielectric 9 becomes a heating element and supplies heat energy to the bottom surface of the lower plate 7b.
[0040]
At this time, since the hot air circulating in the heating chamber 2 is directed between the bottom surface of the lower plate 7b and the dielectric 9 from the door 17 side to the rear surface of the heating chamber 2, the lower heater 16 is provided only on the door 17 side. In other words, the same effect can be obtained by installing only the left side from the center in FIG.
[0041]
The hot air whose thermal energy has decreased by flowing between the bottom surface of the lower plate 7b and the dielectric 9 flows into the hot air device 4 through the intake hole 6 provided in the rear wall surface of the heating chamber 2, and is again heated by the fan 4b. Then, heat energy is transmitted by the hot air heater 4a, and is again blown into the heating chamber 2 as hot air in which the heat energy is stored.
[0042]
Here, the hot air flowing into the hot air device 4 and the hot air sent out from the fan 4b are prevented from being mixed by the guide 4d provided in the casing 4c.
[0043]
Thus, in the present invention, by providing the lower heater 16 on the metal plate 13a on the outer bottom surface of the gap 13, the dielectric 9 is heated by the thermal energy of the lower heater 16, and the thermal energy from the dielectric 9 is reduced to the lower plate 7b. The bottom surface of the food is heated, and the food 1 can be heated uniformly together with the heat energy of the hot air from above.
[0044]
【The invention's effect】
As described above, according to the present invention, the heating chamber for storing food, the upper heater provided at the upper portion of the heating chamber, the hot air device provided at the rear outer surface of the heating chamber, and the heating chamber are disposed. An upper plate and a lower plate for placing two upper and lower foods, a planar dielectric provided on the bottom surface of the heating chamber on which foods can be placed, a magnetron for generating high frequency, and this magnetron The rotating antenna diffuses the high frequency generated from the heating chamber into the heating chamber. A lower heater on the outer bottom surface of the metal plate, the dielectric can be heated by the lower heater to supply heat energy to the lower dish, and the food in the lower dish Can be heated uniformly with hot air .
[0045]
In addition, this makes it possible to heat the upper and lower two stages, which was not possible with the prior art, and to produce effects such as being able to heat many foods at once.
[Brief description of the drawings]
FIG. 1 is a side sectional view showing an embodiment of the configuration of the present invention.
FIG. 2 is a side sectional view showing an embodiment of a conventional configuration.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Food 2 Heating chamber 3 Upper heater 4 Hot air apparatus 7 Dish 9 Dielectric 10 Magnetron 11 Rotating antenna 13 Gap 13a Metal plate 14 Waveguide part 16 Lower heater

Claims (1)

  A heating chamber (2) for storing food (1), an upper heater (3) provided at the top of the heating chamber (2), and a hot air device (4) provided on the rear outer surface of the heating chamber (2); The upper plate (7a) and the lower plate (7b) for placing the upper and lower two-stage food (1) arranged in the heating chamber (2) are provided on the bottom surface of the heating chamber (2). 1) a planar dielectric (9) that can be placed thereon, a magnetron (10) that generates a high frequency, and a rotating antenna that diffuses the high frequency generated from the magnetron (10) into the heating chamber (2) ( 11), the top surface shares the dielectric (9) on the bottom surface of the heating chamber (2), the bottom surface is covered with the metal plate (13a), and the magnetron (10 ) With a waveguide (14) for guiding high frequency from the outside of the metal plate (13a) Provided lower heater (16) on the surface, cooking device and supplying thermal energy to the lower tray (7a) is heated dielectric (9) by the lower heater (16).

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