JP2017003264A - Heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating cooker capable of achieving uniform heating of the entire heating chamber while achieving localized area concentrated heating in the heating chamber without performing complicated rotation control on a plurality of antennas.SOLUTION: While performing control for rotating an antenna 34 at constant rotational frequency, a rotational position of the antenna 34 is calculated from the rotational frequency of the antenna 34 and an origin position of the antenna 34, and when the antenna 34 faces a specific position, output of a microwave radiated in an oven chamber 2 from the antenna 34 is varied. Thus, concentrated heating can be performed locally in the oven chamber 2. Also, for example, when the microwave is radiated at the constant output from the antenna 34 into the oven chamber 2, while rotating the antenna 34 at the constant rotational frequency, the entire oven chamber 2 can be heated uniformly.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a cooking device such as a microwave oven having both functions of a microwave oven and an oven, for example.

  Conventionally, for example, in Patent Document 1, a radiant heater is arranged at the top of a heating chamber for taking in and out an object to be heated, and a hot air unit including a hot air heater or a hot air fan is arranged at the back of the heating chamber, A heating cooker is disclosed in which a plurality of heating means are controlled by a control means by providing heaters in the upper and lower portions of the heating chamber instead of the hot air unit. In such a heating cooker, when a user selects a specific cooking menu using the operation unit, a plurality of heating means are controlled in accordance with a control sequence corresponding to the selected cooking menu, and an object to be heated in the heating chamber is selected. The control means is provided with an automatic cooking function for automatically heating and cooking.

  Further, in the cited documents 2 and 3, a plurality of antennas that radiate microwaves are arranged in the heating chamber, and each antenna is normally rotated at a constant rotational speed (rotational speed) in order to achieve uniform heating of the entire heating chamber. In order to realize local concentrated heating in the heating chamber according to the purpose, a cooking device is disclosed in which each antenna having directivity is directed in a specific direction. In such a cooking device, a motor as a driving means is attached to each antenna, and the operation of each motor is controlled by the control means.

JP 2013-217565 A JP 2008-282893 A JP 2008-157586 A

  However, in the heating cooker of Patent Document 1 above, the combination of heating means to be used according to each cooking menu is determined by the automatic cooking function, and for example, even if there is a margin in the power consumption at home In the cooking menu, half-forced cooking is performed by using only one heating means among a plurality of heating means. Due to the limitation of the heating means to be used, there were complaints that the cooking time until the cooking ends was increased, the amount of heating with respect to the object to be heated was suppressed, and the taste was lowered.

  Further, in the heating cookers of Patent Documents 2 and 3, the rotatable antenna is stopped at a target location in the heating chamber, and the antenna is rotated at a constant rotation speed while realizing local concentrated heating in the heating chamber. In addition, uniform heating of the entire heating chamber must be realized, which requires a plurality of antennas and complicates the control of the motor by the control means.

  The objective of this invention is providing the heating cooker which can implement | achieve uniform heating of the whole heating chamber, implement | achieving the local concentrated heating in a heating chamber, without carrying out complicated rotation control of several antennas.

  The heating cooker according to claim 1, wherein a heating chamber that houses an object to be heated, an antenna that radiates microwaves to the heating chamber, a driving unit that rotationally drives the antenna, and a position that detects the origin position of the antenna Based on detection results from the detection means, the temperature distribution detection means for detecting the temperature distribution in the heating chamber, and the temperature distribution detection means, the output of the microwave is variable when the antenna is directed to a specific position. And control means for causing

  The heating cooker according to claim 2, wherein the control means controls so as to extract the temperatures of a plurality of food parts based on the detection result of the temperature distribution detection means and concentrate the microwaves on the food parts having the lowest temperature. It has a configuration.

  The cooking device according to claim 3, wherein when there is a temperature difference between the plurality of food parts, the control means is configured so that the degree to which the output of the microwave is varied according to the degree of the temperature difference. Is configured to control.

  According to the first aspect of the present invention, the antenna is controlled based on the rotational speed of the antenna and the origin position of the antenna detected by the position detecting means while performing the control of rotating the antenna at a constant rotational speed by the driving means as in the prior art. The rotation position of the heating chamber is calculated by changing the output of the microwave radiated from the antenna to the heating chamber when the antenna faces a specific position based on the detection result from the temperature distribution detection means. Can be heated locally. Further, for example, if microwaves are radiated from the antenna to the heating chamber at a constant output while rotating the antenna at a constant rotation speed, the entire heating chamber can be heated uniformly. Therefore, it is possible to provide a heating cooker that realizes uniform heating of the entire heating chamber while realizing localized central heating in the heating chamber without complicatedly controlling the plurality of antennas.

  According to the invention of claim 2, when heating a plurality of foods simultaneously in the heating chamber, the microwaves are concentrated and radiated to the food having the lowest temperature so that the finishes of the plurality of foods are made closer to each other. Can do.

  According to the invention of claim 3, for example, when refrigerated food and frozen food are heated at the same time, if the control means determines that the temperature difference between the foods is large, more microwaves are concentrated in the frozen food portion. In addition, the microwave output is changed more greatly according to the temperature difference. Thereby, even if there is a temperature difference among a plurality of foods, the finish can be stabilized uniformly.

It is a front view which shows the external appearance at the time of applying the heating cooker of this invention to a microwave oven. It is the schematic which shows the internal structure which concerns on the oven function mainly of a microwave oven same as the above. It is the figure which looked at the main body of the state which removed the door same as the above from the front. It is a schematic sectional drawing which shows the internal structure of a microwave oven same as the above. It is a top view which shows a structure of an antenna and its periphery same as the above. It is a block diagram which shows the electrical structure of a microwave oven same as the above. It is explanatory drawing which shows an example of the control sequence of a hot air heater and a radiation heater according to the difference in rated power consumption same as the above. It is explanatory drawing which shows an example of the temperature setting according to rated power consumption same as the above. It is a figure which shows typically the relationship between the to-be-heated material in an oven cabinet, and the output of a microwave same as the above.

  Hereinafter, preferred embodiments of the cooking device of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is an external view of a microwave oven that is a heating cooker. Inside the main body 1 formed in the shape of a rectangular box, an oven cabinet 2 is formed as a heating chamber in which an object to be heated is stored and cooked. The oven cabinet 2 is wide in the left-right direction, and is provided with a door 3 for opening and closing the large front opening. Therefore, the door 3 is provided so as to cover almost the entire front surface of the main body 1, and the lower end portion thereof is pivotally supported so as to be freely rotatable.

  The upper part of the door 3 is provided with a handle 4 for opening and closing which is used when the door 3 is opened and closed, and the lower part of the door 3 is provided with an operation panel unit 5 for display and operation. The operation panel unit 5 includes a display unit 6 for displaying cooking setting contents, progress status, and the like, as the operation unit 7, a first heating condition setting unit 8 and a second heating condition for setting a heating condition related to cooking. It comprises a setting means 9, a heating start instruction means 10 for instructing the start of heating, and a cancellation instruction means 11 for canceling the setting or stopping cooking. Although not shown, an operation panel PC (printed circuit) board (not shown) on which a microcomputer is mounted is disposed on the rear side of the operation panel 5 in order to control the display means 6 and the operation means 7. .

  The first heating condition setting means 8 is an electronic touch key, and includes a “mono” key and a “boiled” key for selecting a cooking menu for automatic cooking that does not require setting of cooking time and temperature. In addition, it consists of a “range” key, “oven” key, and “steam” key for selecting manual cooking that requires setting of cooking time, temperature, or output. Configured. The second heating condition setting means 9 detects rotation in order to select a cooking menu other than “mono” or “boiled” in addition to setting the cooking time and temperature in manual cooking. This is a rotatable dial composed of an encoder. The heating start instruction means 10 is a key for starting heating the object to be heated in the oven chamber 2 after setting the heating conditions by the first heating condition setting means 8 or the second heating condition setting means 9, and a cancel instruction The means 11 is a key for canceling the heating condition and stopping the cooking. These heating start instruction means 10 and cancellation instruction means 11 are mechanical keys (tactile switches).

  The display means 6 includes, for example, a liquid crystal display means 14 that displays the number of cooking menu, temperature, time, output, and the like, and an LED display means 15 that blinks or lights up according to the progress of cooking. . Here, the LED display means 15 is disposed at an appropriate position of the operation panel unit 5 as an optical display that performs optical communication with an external device different from the main body 1 having a light receiving unit (not shown).

  FIG. 2 is a diagram showing an internal structure mainly related to the oven function of the microwave oven. In the figure, a hot air fan unit 21 that generates hot air is provided inside the main body 1 and located behind the oven cabinet 2. The hot air fan unit 21 is disposed as a heating unit for heating an object to be heated in the oven cabinet 2 on the inner side of the inner wall surface 22 forming the oven cabinet 2, and a hot air heater 23 for heating the air and its heating Main components are a hot air fan 24 for sending the generated air into the oven cabinet 2 and a hot air motor 25 for rotating the hot air fan 24. The hot air fan 24 is provided as a so-called centrifugal fan that discharges air taken in the axial direction in a radial direction perpendicular to the axial direction by centrifugal force during rotation, and the tubular hot air heater 23 is in the radial direction of the hot air fan 24. Is placed around. For example, a sheathed heater, a mica heater, a quartz tube heater, or a halogen heater is used as the hot air heater 23 that is also a heat generating portion.

  Aside from the hot air fan unit 21, a radiant heater 27 for heating an object to be heated in the oven cabinet 2 is provided on the upper portion of the oven cabinet 2. That is, the microwave oven of the present embodiment has a configuration in which the hot air heater 23 and the radiant heater 27 are separately provided as a plurality of heating means. Further, a control means 28 for controlling the operation of each load incorporated in the microwave oven is disposed at the lower part of the oven cabinet 2.

  FIG. 3 is a front view of the main body 1 with the door 3 removed. In the figure, a suction port 29 and a discharge port 30 are formed on the inner wall surface 22, and air (hot air) can flow between the oven chamber 2 and the internal space of the hot air fan unit 21. In particular, in this embodiment, when a drive voltage is applied to the hot air motor 25 in response to a motor drive signal from the control means 28 and the hot air fan 24 rotates in the internal space of the hot air fan unit 21, Air is sucked into the hot air fan 24 from the suction port 29 located in the central portion, and the air is heated by passing through the hot air heater 23 energized in the internal space of the hot air fan unit 21. And the heated air is discharged | emitted from the several discharge port 30 arrange | positioned around the suction inlet 29, circulates the whole in the oven cabinet 2, and heat-cooks the to-be-heated material accommodated there, It has become.

  FIG. 4 is a longitudinal sectional view showing the internal structure of the microwave oven. In the figure, an infrared sensor 31 facing the oven cabinet 2 is attached to the upper side of the oven cabinet 2. Although not shown, the infrared sensor 31 is composed of, for example, eight linearly arranged infrared temperature detection elements, and the infrared sensor 31 is swung inside the main body 1, so that almost the entire temperature distribution in the oven cabinet 2 is obtained. It is possible to detect. Also, below the oven cabinet 2 are a magnetron 32 that is a source for generating microwaves, a waveguide 33 that guides the microwaves from the magnetron 32 to the inside of the oven cabinet 2, and an oven from the waveguide 33 to the oven. An antenna 34 that radiates microwaves to the cabinet 2, an antenna motor 36 such as an AC motor that horizontally rotates the antenna 34 around an upright shaft 35, and a microswitch 37 that is attached in the vicinity of the antenna 34 are arranged. .

  FIG. 5 shows the configuration of the antenna 34 and its surroundings. In the figure, an antenna 34 has radiation directivity, and a shaft 35 of an antenna motor 36 is attached to the center thereof. Further, only one antenna 34 is disposed at the approximate center of the bottom surface of the oven cabinet 2. Although the antenna 34 of this embodiment has a disk-like outer shape, a V-shaped notch 39 is formed in a portion where the microwave radiation directivity is large when viewed from the shaft 35. The opposite side of the notch 39 is a portion having a small microwave radiation directivity. As used herein, “a part having a high radiation directivity” means a part having a high directivity where microwaves are concentrated and radiated in one direction compared to other parts. "Means a portion having a low directivity in which microwaves are diffused and emitted compared to other directions.

  The microswitch 37 includes an actuator that can move according to the rotational position of the antenna 34. Here, when the antenna 34 rotates, the antenna 34 is moved toward a portion having a high microwave radiation directivity with the axis 35 as the origin. Each time the microswitch 37 is positioned in the direction of 90 ° on the opposite side of the rotation direction, an actuator (not shown) is operated to generate an electrical detection signal indicating that the antenna 34 is at the origin position. 37 to output to the control means 28. FIG. 5 shows the positional relationship between the antenna 34 and the microswitch 37 when the rotating antenna 34 is at the origin position. Instead of the microswitch 37, a non-contact detection element such as a photo interrupter is used. May be.

  FIG. 6 shows the electrical configuration of the microwave oven described above. Reference numeral 41 denotes a microcomputer corresponding to the control means 28, which includes a CPU as arithmetic processing means, a memory as storage means, an input / output device, and the like. In addition to the first heating condition setting unit 8, the second heating condition setting unit 9, the heating start instruction unit 10, and the cancellation instruction unit 11, the temperature in the oven chamber 2 is input to the input port of the microcomputer 41. The internal temperature detection means 42 to detect and the infrared sensor 21 are equipped with a swing mechanism, and by detecting the temperature distribution in the oven cabinet 2, the temperature of the object to be heated accommodated therein can be detected. A position detection unit 45 configured to include an internal temperature distribution detection unit 43, a door opening / closing detection unit 44 for detecting the open / closed state of the door 3, a micro switch 37, and the like, and detecting an origin of rotation of the antenna 34, Each is electrically connected. In addition to the display means 6, a microwave heating means 46 including a magnetron 32 and the like are provided in the output port of the microcomputer 41 in addition to the display means 6, and the oven cabinet 2. In order to heat the object to be heated in the heater, heater driving means 47 such as a relay for cutting off the hot air heater 23 and the radiant heater 27 of the hot air fan unit 21 and the outlet side of the waveguide 33 are provided. In order to rotationally drive the provided antenna 34, the antenna driving means 48 including the antenna motor 36 and the like, the buzzer notifying means 49 for notifying the user of the progress status such as the end of cooking, and the hot air fan 24 are rotationally driven. Therefore, the motor driving means 50 including the hot air motor 25 is electrically connected to each other.

  Then, the microcomputer 41 detects the internal temperature detection means 42, the internal temperature distribution detection means 43, the door opening / closing detection means 44, the detection signals from the position detection means 45, the first heating condition setting means 8, 2 Receiving each operation signal from the heating condition setting means 9, the heating start instruction means 10 and the cancellation instruction means 11, the microwave heating means 46, the heater driving means 47, the antenna driving means 48, the buzzer notification means 49, and a function for outputting a drive control signal to the motor drive means 50 and a display control signal to the display means 6.

  When the microcomputer 41 receives an operation signal associated with the pushing operation from the first heating condition setting unit 8, the second heating condition setting unit 9, or the heating start instruction unit 10, the microwave heating unit according to the operation signal. 46 and the heater drive means 47 are driven at a predetermined timing to control cooking. At the time of control, a detection signal from the internal temperature detection means 42 such as a thermistor for detecting the temperature in the oven cabinet 2 and a detection signal from the internal temperature distribution detection means 43 for detecting the temperature distribution in the oven cabinet 2 are received. As a reference, the heating temperature is controlled to a predetermined value. Moreover, when cooking is completed, the microcomputer 41 sends a control signal to the buzzer notification means 49 to cause the buzzer notification means 49 to ring. Further, when a detection signal indicating that the door 3 is opened during cooking is received from the door opening / closing detection means 44 or when an operation signal accompanying a push operation from the cancel instruction means 11 is received, the microcomputer 41 Stops sending control signals to the microwave heating means 46 and the heater heating means 47, and stops control of cooking.

  In the present embodiment, the setting of the rated power consumption for the microwave oven stored in the storage unit of the control means 28 (microcomputer 41) can be switched by manually operating, for example, the second heating condition setting means 9 of the operation means 7. The second heating condition setting means 9 here is provided as a setting means that makes the setting of the rated power consumption variable. The control means 28 corresponds to all cooking menus that can be selected by the operation means 7 and how the hot air heater 23, the hot air motor 25, the radiation heater 27, and the magnetron 32 to be controlled by the microwave oven are controlled. In particular, in oven cooking by heater heating, when a cooking menu for automatic cooking is selected by the operating means 7, it is automatically performed according to a specific control sequence corresponding to the cooking menu. Oven automatic cooking control means 55 is provided as an automatic cooking function for setting the cooking time and temperature and individually controlling the operation of the hot air heater 23 and the radiation heater 27.

  In particular, the oven automatic cooking control means 55 in the present embodiment has a configuration in which the combination of heating means used in the cooking menu is varied according to the rated power consumption set by the second heating condition setting means 9. For example, when the power consumption of the hot air heater 23 is 1.4 kW and the power consumption of the radiation heater 27 is 1.1 kW, the rated power consumption as the microwave oven is set to 3 kW (input voltage) by the second heating condition setting means 9. Can be set to any one of 1.5 kW (input voltage is 15 A when the input voltage is 100 V AC), and the hot air heater 23 is set to 1.5 kW in a direction to reduce the rated power consumption. When the radiant heater 27 is controlled so that the radiant heater 27 cannot be used simultaneously, the hot blast heater 23 and the radiant heater 27 can be used simultaneously when switching to 3 kW in the direction of increasing the rated power consumption. And the combination of the radiation heater 27 are varied.

  In the present embodiment, the setting of the rated power consumption is switched by manual operation using the second heating condition setting means 9, but for example, the current consumption in the house where the microwave oven is installed is monitored by the demand control device, In response to a control signal corresponding to the amount of current used output from the demand control device, the setting means provided in the main body 1 may arbitrarily change the setting of the rated power consumption. In this way, the optimum rated power consumption of the microwave oven is automatically set according to the amount of current used in the house, and based on the rated power consumption, hot air heater 23 and radiant heater 27 by automatic oven cooking are set. The combination of can be varied.

  Further, when the control means 28 receives the operation signal indicating that the range cooking is performed from the operation means 7, the control means 28 drives the antenna so that the antenna 34 rotates at a constant speed based on the detection signal from the position detection means 45. In addition to being sent to the means 48, the detection signal from the internal temperature distribution detection means 43 is taken in, and the output of the microwave from the antenna 34 rotating at a constant speed according to the temperature distribution in the oven compartment 2 is output. A range cooking control means 56 for sending a control signal to be varied to the microwave heating means 46 is provided. For example, in the example shown in FIG. 5, when it is determined that the temperature distribution in the right half region is lower than the left half region of the main body 1 around the antenna 34 based on the detection signal from the internal temperature distribution detection means 43, the antenna When the portion where the cutout 39 of 34 is formed faces the range of the arrow S1 corresponding to the right half region of the main body 1, the output from the antenna 34 is 600 W, while the cutout of the antenna 34 is When the portion where the notch 39 is formed is directed to the range of the arrow S2 corresponding to the left half region of the main body 1, the microwave cooking control means 56 to the microwave heating means so that the output from the antenna 34 becomes 400W. The output of the microwave generated from the magnetron 32 is adjusted by the control signal sent to 46.

  The range cooking control means 56 extracts the temperature of the several food part accommodated in the oven cabinet 2 from the temperature distribution in the oven cabinet 2 based on the detection signal from the chamber temperature distribution detection means 43, for example. be able to. In this case, a control signal may be sent to the microwave heating means 46 so that microwaves from the antenna 34 are concentrated and radiated to the food part having the lowest temperature among the extracted food parts. When there is a temperature difference between the plurality of food parts, a control signal is sent to the microwave heating means 46 so that the degree of changing the microwave output from the antenna 34 changes according to the degree of the temperature difference. May be.

  Next, the operation related to oven cooking will be described for the microwave oven having the above-described configuration.

  When the “oven” key of the first heating condition setting means 8 is pushed from the cut-off state where cooking is not performed, and then the second heating condition setting means 9 is dial-operated, the time and temperature of the oven cooking are manually set. Set by. After that, when the heating start instruction means 10 is pushed to start heating, a hot air motor 24 is driven to rotate at a desired number of revolutions by a control signal from the microcomputer 41 to the motor driving means 50. 25, and the detection signals from the internal temperature detection means 42 and the internal temperature distribution detection means 43 are taken in, so that the inside of the oven cabinet 2 or the object to be heated reaches a desired temperature. 23 and the radiation heater 27 are controlled.

  In the above series of procedures, for example, when the oven cooking is performed without preheating by pressing the “oven” key twice, before the “oven” key is operated, the food to be heated Is placed in the oven cabinet 2. On the other hand, for example, in the case of performing oven cooking with preheating by pressing the “oven” key once, after the pressing operation of the heating start instruction means 10, the end of preheating in the oven chamber 2 is buzzer. After the sounding notification is given by the notification means 49, the food that is the object to be heated is put into the oven cabinet 2. Regardless of whether there is preheating or not, the hot air fan 24 rotates in a state where food is put in the oven cabinet 2, so that the air sucked into the hot air fan unit 21 from the inside of the oven cabinet 2 through the suction port 29 is obtained. The hot air fan 24 blows out in the radial direction by centrifugal force, hits the heated hot air heater 23 surrounding the entire circumference of the hot air fan 24, and generates hot air in the hot air fan unit 21 isolated from the oven chamber 2. Is done. The hot air hitting the hot air heater 23 is discharged through a plurality of outlets 30 arranged facing the hot air heater 23, circulates in the entire oven cabinet 2, and heats the food stored therein. In addition to the hot air fan unit 21, the food in the oven chamber 2 can be heated by energizing the radiant heater 27 to generate heat by a control signal from the microcomputer 41 to the heater driving means 47.

  Apart from such manual cooking, the microwave oven of the present embodiment selects a specific cooking menu from the operation means 7 without setting the cooking time and temperature by the oven automatic cooking control means 55 incorporated in the microcomputer 41. It has an automatic cooking function that automatically sets cooking time and temperature. Here, as a specific example, a case where “pizza” is selected as a specific cooking menu will be described. In a state where food is put in the oven cabinet 2 in advance, the second heating condition setting means 9 is dialed to display a liquid crystal display. While confirming the number corresponding to the cooking menu displayed on the means 14, the cooking menu of “pizza” is selected.

  In this embodiment, the setting of the rated power consumption stored in the control means 28 can be varied by manually operating the second heating condition setting means 9 in the off state. At the time when 10 is operated, the rated power consumption is set to either 1.5 kW or 3 kW.

  After that, when the heating start instruction means 10 is pushed to start heating, the oven automatic cooking control means 55 follows the control sequence corresponding to the cooking menu of “pizza” and the hot air heater 23 as a plurality of heating means. And the radiant heater 27 are respectively controlled to automatically cook the object to be heated in the heating chamber. At this time, the oven automatic cooking control means 55 varies the usage pattern of the hot air heater 23 and the radiant heater 27 and the cooking time for the object to be heated, based on the preset rated power consumption.

  FIG. 7 shows an example of a control sequence of the hot air heater 23 and the radiant heater 27 according to the difference in the rated power consumption in the cooking menu “pizza”. As described above, when the power consumption of the hot air heater 23 is 1.4 kW and the power consumption of the radiation heater 27 is 1.1 kW, the rated power consumption of the microwave oven is set to 1.5 kW by the second heating condition setting means 9. When set, as shown in FIG. 5A, the oven automatic cooking control means 55 “ON”, that is, turns on only the radiant heater 27 between 0 minutes and 15 minutes after the start of heating, and the hot air heater 23. Is turned OFF, that is, after 15 to 30 minutes from the start of heating, a control signal is sent to the heater driving means 47 to turn on only the hot air heater 23 and turn off the radiant heater 27. Although not shown, when the hot air heater 23 is turned on, the hot air fan 24 also rotates, and the hot air generated in the hot air fan unit 21 circulates in the entire oven chamber 2 and is to be heated. Cook. Thus, in the “pizza” cooking menu in which the rated power consumption is set low, only one of the hot air heater 23 and the radiant heater 27 is energized and controlled so as not to exceed the set rated power consumption. Baked into pizza in 30 minutes cooking time.

  On the other hand, when the rated power consumption of the microwave oven is set to 3 kW by the second heating condition setting means 9, the oven automatic cooking control means 55, as shown in FIG. In the meantime, a control signal for turning on both the hot air heater 23 and the radiant heater 27 is sent to the heater driving means 47. Also in this case, when the hot air heater 23 is turned on, the hot air fan 24 rotates, and the hot air generated in the hot air fan unit 21 circulates in the entire oven chamber 2 and heats the object to be heated stored therein. Cook. Thus, in the “pizza” cooking menu in which the rated power consumption is set high, both the hot air heater 23 and the radiant heater 27 are energized at the same time, so that the object to be heated in the oven cabinet 2 can be cooked in 15 minutes. Bake up.

  As another example, when a hamburger is baked as an object to be heated, for example, in manual cooking, the temperature and time are set to 300 ° C. and 30 minutes, respectively. Then, between 0 and 15 minutes after the start of heating, only the radiant heater 27 is turned on, and between 15 and 30 minutes after the start of heating, only the hot air heater 23 is turned on and the hamburger is baked in a cooking time of 30 minutes. . In the “hamburger” cooking menu where the rated power consumption is set high, the hot air heater 23 and the radiant heater 27 are both turned on between 0 minutes and 15 minutes after the start of heating, and the hamburger is turned into a hamburger with a short cooking time of 15 minutes. Bake it.

  Thus, the oven automatic cooking control means 55 of this embodiment uses the radiant heater 27 simultaneously when the hot air heater 23 is used when the rated power consumption is set to 1.5 kW by the second heating condition setting means 9. On the other hand, when the rated power consumption is switched to 3 kW by the second heating condition setting means 9, the hot air heater 23 and the radiant heater 27 can be used simultaneously so that the hot air heater 23 and the radiant heater 27 can be used simultaneously. Change the combination. As a result, when switching to the direction of increasing the rated power consumption, avoid unnecessary restrictions to suppress the amount of heating to the heated object, shorten cooking time as a microwave oven, and improve the taste by high heating amount Can be achieved.

  Here, the temperature setting of the automatic cooking function by the oven automatic cooking control means 55 will be described. In FIG. 7 described above, when the set rated power consumption is 1.5 kW or 3 kW, when the hot air heater 23 and the radiant heater 27 are “ON”, that is, they are on, the hot air heater 23 and the radiant heater 27 are turned on. If the is continuously energized, the control temperature (= temperature setting) may be exceeded depending on the temperature range. Therefore, the oven automatic cooking control means 55 is based on the detection signal from the inside temperature detection means 42 and the hot air heater 23 and the radiation heater 27 when the detected temperature in the oven compartment 2 exceeds a preset control temperature. Are turned off, and when the temperature falls below the control temperature, the hot air heater 23 and the radiant heater 27 are turned on, and the hot air heater 23 and the radiant heater 27 are controlled to be turned off and on during the “ON” period.

  FIG. 8 shows an example of the control temperature, that is, the temperature setting according to the set rated power consumption. When the rated power consumption is set to 1.5 kW, the oven automatic cooking control means 55 sets the control temperature of the automatic cooking function in the range of 250 ° C to 300 ° C. On the other hand, when the rated power consumption is set to 3 kW, the hot air heater 23 and the radiant heater 27 can be used at the same time as described above, and the oven cabinet 2 can be kept at a higher temperature. The control means 55 makes it possible to set the control temperature of the automatic cooking function in the range of 250 ° C to 400 ° C. That is, the higher the rated power consumption set by the second heating condition setting means 9, the higher the control temperature of the automatic cooking function can be set.

  This is because when the rated power consumption is set to a low value of 1.5 kW to limit the maximum output of the automatic cooking function, if the control temperature is set in accordance with the selected cooking menu, it is as high as 400 ° C., for example. This is because, in the temperature setting, even if the hot air heater 23 or the radiant heater 27 is continuously energized, there is a possibility that power is insufficient. In this embodiment, when the rated power consumption is set to a low value, the automatic cooking control means 55 disables the high temperature setting and sets the control temperature in the range of 250 ° C. to 300 ° C., thereby automatically cooking. Even if it is a function, it becomes possible to optimize the temperature setting with respect to the to-be-heated object in the oven cabinet 2 according to the set rated power consumption.

  Next, the operation relating to the range cooking will be described. With the food in the oven cabinet 2 in advance, the “range” key of the first heating condition setting means 8 is pushed one or more times to select the output. Then, when the second heating condition setting means 9 is dialed, the cooking time is set manually. Thereafter, when the heating start instruction means 10 is pushed to start heating, the range cooking control means 56 controls the microwave 34 to radiate microwaves at the time set in the selected output range. Is sent to the microwave heating means 46 to heat cook the food in the oven cabinet 2.

  In addition to such manual cooking, the microwave oven of the present embodiment is displayed on the liquid crystal display means 14 by dialing the second heating condition setting means 9 with food in the oven chamber 2 in advance. When a specific cooking menu related to range cooking is selected while checking the number corresponding to the cooking menu, the cooking range control means 56 automatically calculates the cooking time and output based on the control sequence corresponding to the specific cooking menu. It has an automatic cooking function to set to. In this case as well, the range cooking control means 56 sends a control signal such that microwaves are radiated from the antenna 34 to the microwave heating means 46 at the set time within the set output range. Cook food.

  In the above-described range cooking, as in the past, the antenna motor 36, which is an AC motor, is controlled to rotate the antenna 34 at a constant rotational speed. This is because the range cooking control means 56 obtains a detection signal from the position detection means 45 that is generated when the antenna 34 is at the origin position, and the range cooking control means 56 so that the detection signals are generated at regular intervals. This is realized by sending a control signal from the antenna to the antenna driving means 48. The rotation speed of the antenna 34 is, for example, 1 rotation / 3 seconds at a frequency of 50 Hz. Under such control, the range cooking control means 56 calculates the rotational position of the antenna 34 from the detection signal from the position detection means 45 and the rotational speed of the antenna 34, and detects from the internal temperature distribution detection means 43. Based on the signal, when the antenna 34 is directed to a specific position in the oven cabinet 2, a control signal is sent to the microwave heating means 46 so as to vary.

  Specifically, as shown in FIG. 9 (A), when the position where the object to be heated X is placed is on the back side of the oven cabinet 2, the range cooking control means 56 is supplied from the inside temperature distribution detection means 43. Based on the detection signal, the position of the object to be heated X in the oven chamber 2 is specified using the difference between the temperature of the part where the object to be heated X is placed and the temperature of the other part. When the notch 39 faces the position of the article X to be heated, the output of the microwave radiated from the antenna 34 is varied so as to be larger than the output when it faces the other part. Thereby, the specific part which put the to-be-heated material X in the oven chamber 2 can be heated locally. In addition, this requires only one antenna 34 to be rotated at a constant rotation speed, and does not require complicated rotation control. Furthermore, the range cooking control means 56 sends a control signal to the microwave heating means 46 that radiates microwaves with a constant output from the antenna 34 into the oven cabinet 2 while rotating the antenna 34 at a constant rotational speed. For example, the entire oven cabinet 2 can be heated uniformly.

  In addition, as shown in FIG. 9B, when the object to be heated X1 that is refrigerated food and the object to be heated X2 that is frozen food are respectively placed in the oven cabinet 2, the range cooking controller 56 Based on the detection signal from the internal temperature distribution detecting means 43, the difference between the temperature of the portion where the heated objects X1 and X2 are placed and the temperature of the other portion is used, and the heated object X1 inside the oven chamber 2 While specifying each position of X2, the temperature of to-be-heated material X1, X2 is each extracted. Then, in order to concentrate the microwaves from the antenna 34 on the portion of the object to be heated X2 having the lowest temperature among the plurality of objects to be heated X1 and X2 while rotating the antenna 34 at a constant rotation number, When the notch 39 of 34 is directed to the position of the object to be heated X2, the output of the microwave radiated from the antenna 34 becomes larger than the output when the object is directed to the object to be heated X1 or other parts. To be variable. Thereby, even when a plurality of objects to be heated X1 and X2 having a temperature difference are accommodated in the oven cabinet, the finishes of these objects to be heated X1 and X2 can be made closer to each other.

  Furthermore, when there is a temperature difference between the plurality of objects to be heated X1 and X2 accommodated in the oven cabinet 2, the microwave cooking control means 56 of the present embodiment can change the output of the microwave according to the degree of the temperature difference. A control signal is sent to the microwave heating means 46 so as to change the degree to which it is applied. The following Table 1 shows an example of the microwave output for the objects to be heated X1 and X2 according to the degree of such a temperature difference.

  In Table 1 above, when the food on the high temperature side such as refrigerated food is the object to be heated X1, and the food on the low temperature side such as frozen food is the object to be heated X2, When there is no temperature difference between the objects X1 and X2 (= 0 ° C.), the microwave outputs when the notch 39 of the antenna 34 faces the position of the objects to be heated X1 and X2 are the same (for example, 800 W). As the temperature difference between the objects to be heated X1 and X2 increases, the microwave output (for example, 800 W) when the notch 39 of the antenna 34 faces the position of the object to be heated X2 is the same value. On the other hand, the microwave output (for example, 700 W to 200 W) when the notch 39 of the antenna 34 faces the position of the object to be heated X2 is reduced, and as a result, the output difference between the two becomes large. Control to be That. Thus, as the temperature difference between the objects to be heated X1 and X2 increases, the output difference of the microwaves radiated to the objects to be heated X1 and X2 is increased, and in the portion of the object to be heated X2 having a lower temperature, By concentrating more microwaves, the finish of the objects to be heated X1 and X2 can be uniformly stabilized regardless of any temperature difference between the objects to be heated X1 and X2.

  As described above, the microwave oven as the heating cooker of the present embodiment includes the hot air heater 23 and the radiation heater 27 as a plurality of heating means, and the control means 28 for controlling the hot air heater 23 and the radiation heater 27, The operation means 7 operated by the user and the display means 6 for displaying the cooking state by the operation means 7 are provided. The operation means 7 has a second heating condition setting as a setting means for making the rated power consumption variable. The control means 28 includes an oven automatic cooking control means 55 for performing an automatic cooking function for controlling the hot air heater 23 and the radiant heater 27 in accordance with a control sequence corresponding to the cooking menu. This oven automatic cooking control means 55 is a hot air heater 23 used in the automatic cooking function according to the rated power consumption set by the second heating condition setting means 9. The combination of radiant heater 27 has a configuration to vary.

  In this case, when the oven automatic cooking control means 55 that performs the automatic cooking function provided in the control means 28 automatically heats the object to be heated in the oven cabinet 2 according to the selected cooking menu, the control means 28. Even in the same cooking menu, the oven automatic cooking control means 55 combines the hot air heater 23 and the radiant heater 27 in accordance with the rated power consumption set by the second heating condition setting means 9 for cooking by heating. Can be varied. Therefore, when the second heating condition setting means 9 is switched so as to increase the rated power consumption, an unnecessary restriction such as heating cooking using only one of the hot air heater 23 or the radiant heater 27 is controlled. The oven automatic cooking control means 55 of the means 28 can be avoided, and even with the automatic cooking function, the combination of the hot air heater 23 and the radiant heater 27 to be used is optimal according to the set rated power consumption. It becomes possible to be.

  Further, the control means 28 of the present embodiment is provided with a configuration in the oven automatic cooking control means 55 that varies the temperature setting of the automatic cooking function according to the rated power consumption set by the second heating condition setting means 9. ing.

  In this case, when the oven automatic cooking control means 55 that performs the automatic cooking function provided in the control means 28 sets the temperature for the object to be heated according to the cooking menu, the rated consumption set by the second heating condition setting means 9 The set temperature can be varied according to the electric power. Therefore, if the second heating condition setting means 9 is set so as to reduce the rated power consumption and the maximum heating amount of the automatic cooking function is limited, the power of the heating means is simply set according to the cooking menu. Then, since there is a possibility that the heating amount is insufficient and it becomes impossible to heat to the set temperature, the automatic cooking control means 55 of the control means 28 changes the setting to a lower temperature so that even if it is an automatic cooking function, Depending on the set rated power consumption, the temperature setting for the object to be heated can be optimized.

  Moreover, the microwave oven of a present Example is as the oven chamber 2 as a heating chamber which accommodates to-be-heated material, the one antenna 34 which radiates | emits a microwave in the oven chamber 2, and the drive means which rotationally drives the antenna 34 Antenna driving means 48, position detecting means 45 for detecting the origin position of the antenna 34, internal temperature distribution detecting means 43 as temperature distribution detecting means for detecting the temperature distribution in the oven cabinet 2, and internal temperature distribution Based on a detection signal that is a detection result from the detection means 43, a range cooking control means 56 of the control means 28 that varies the output of the microwave when the antenna 34 faces a specific position is provided.

  In this case, as in the prior art, the antenna drive unit 48 controls the antenna 34 to rotate at a constant rotation number, and the antenna 34 is controlled based on the rotation number of the antenna 34 and the origin position of the antenna 34 detected by the position detection unit 45. The rotation position of 34 is calculated, and the output of the microwave radiated from the antenna 34 into the oven chamber 2 when the antenna 34 faces a specific position based on the detection signal from the internal temperature distribution detection means 43 By making the variable, the inside of the oven chamber 2 can be heated locally and concentrated. Further, for example, if microwaves are radiated from the antenna 34 into the oven cabinet 2 with a constant output while rotating the antenna 34 at a constant rotational speed, the entire oven cabinet 2 can be heated uniformly. Therefore, the microwave oven which implement | achieved the uniform heating of the whole oven chamber 2 can be provided, implement | achieving the localized central heating in the oven chamber 2, without carrying out the complicated rotation control of the some antenna 34. FIG.

  Further, in this embodiment, the temperature of the parts to be heated X1 and X2, which are a plurality of food items housed in the oven cabinet 2, is extracted based on the detection signal from the inside temperature distribution detecting means 43, and the lowest temperature is obtained. The range cooking control means 56 of the control means 28 controls so that the microwaves from the antenna 34 are concentrated on the portion to be heated X2.

  In this case, when simultaneously heating a plurality of objects to be heated X1 and X2 in the oven cabinet 2, by radiating concentrated microwaves from the antenna 34 to the portion of the object to be heated X2 having the lowest temperature, The finish of the plurality of objects to be heated X1 and X2 can be made closer to each other.

  Further, in this embodiment, when it is determined that there is a temperature difference between the plurality of objects to be heated X1 and X2 based on the detection signal from the internal temperature distribution detecting means 43, the antenna 34 is set according to the degree of the temperature difference. The range cooking control means 56 of the control means 28 is controlled so that the degree to which the output of the microwaves is varied is changed.

  In this case, for example, when heating the object to be heated X1 as refrigerated food and the object to be heated X2 as frozen food at the same time in the oven cabinet 2, the range cooking control means 56 of the control means 28 is placed between the objects to be heated X1 and X2. If the temperature difference is determined to be large, the microwave output from the antenna 34 is changed more greatly according to the temperature difference in order to concentrate more microwaves in the heated object X2. Thereby, even if there is a temperature difference between the plurality of objects to be heated X1 and X2, the finish can be uniformly stabilized.

  The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention. In the present embodiment, the hot air heater 23 of the hot air fan unit 21 and the radiant heater 27 are combined, but two heating means in which the radiant heaters are separately provided above and below the oven cabinet 2 and the radiant heaters are used. You may comprise by the three heating means which combined the hot-air fan unit 21. FIG. Further, the switching of the rated power consumption may be configured not to be two steps as in the embodiment but to three or more steps or an arbitrary value that is not stepwise. Furthermore, the numerical values shown in Table 1 are merely examples, and may be appropriately changed in consideration of the specifications of the microwave oven.

2 Oven cabinet (heating room)
28 control means 34 antenna 43 chamber temperature distribution detection means (temperature distribution detection means)
45 Position detection means 48 Antenna drive means (drive means)

Claims (3)

A heating chamber for storing an object to be heated;
An antenna that radiates microwaves to the heating chamber;
Driving means for rotationally driving the antenna;
Position detecting means for detecting the origin position of the antenna;
Temperature distribution detecting means for detecting a temperature distribution in the heating chamber;
A heating cooker comprising: control means for varying the output of the microwave when the antenna is directed to a specific position based on a detection result from the temperature distribution detection means. The temperature of a plurality of food parts is extracted based on the detection result of the temperature distribution detection means, and the control means is configured to control the microwave to concentrate on the food part having the lowest temperature. 1 is a heating cooker. When there is a temperature difference between the plurality of food parts, the control unit is configured to control the degree of changing the output of the microwave according to the degree of the temperature difference. The cooking device according to claim 1 .

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