JP2012174470A - Heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating cooker capable of heating a plurality of cooking objects with good heating efficiency without temperature unevenness even when the plurality of cooking objects are heated simultaneously.SOLUTION: The heating cooker includes a main body having a plurality of regions for arranging the cooling objects, a microwave generation device which generates a microwave, a current-voltage detection part, and a control part. The current-voltage detection part detects change in current or voltage of the microwave generation device associatively with the position of a rotary antenna which radiates the microwave to the cooking chamber with directivity while the rotary antenna makes at least one rotation. The control part determines the position of the rotary antenna at which the microwave generation device has operation efficiency equal to or higher than a predetermined value based upon the change in current or voltage, and stops the rotary antenna at the determined position.

Description

  Embodiments described herein relate generally to a cooking device.

  In a cooking device such as a microwave oven, there are a plurality of types of heating means such as microwave range cooking from a magnetron, oven cooking by heat radiated from a heater, steam cooking by steam, and various cooking methods are used. The cooking object can be cooked.

  In addition, today, a cooking method (simultaneously warmed cooking) in which foods having different temperatures are simultaneously heated is known. According to this, each to-be-cooked object can be finished to the suitable temperature simultaneously by one heating.

  Also known is a technique for heating evenly by stopping the rotating plate for diffusing microwaves based on changes in the magnetron current value in consideration of the shape and arrangement position of the object to be cooked. Yes.

JP 2009-257634 A JP 2000-164335 A

  In recent years, regulations relating to energy conservation (energy conservation) have been legislated, and the target value for energy conservation has been revised every few years based on the industry's top runners. There is an urgent need to develop cooking devices such as microwave ovens with energy conservation in mind.

  It is conceivable to apply the technique for controlling the rotating plate based on the impedance change described above to the simultaneous warming technique. However, even when the rotating plate is stopped, local heating still occurs and the temperature unevenness of the cooked food is not small. For this reason, in reality, the rotating plate is rotated to heat the object to be cooked, which eventually changes the impedance. That is, the problem with temperature unevenness and the problem with operation efficiency are in a trade-off relationship, and as a result, it has been difficult to realize energy saving in simultaneous warming.

  The present invention has been made in consideration of such circumstances, and even when a plurality of items to be cooked are heated at the same time, the cooking device capable of heating the items to be cooked efficiently and without uneven temperature. The purpose is to provide.

  The heating cooker according to the embodiment includes a main body having a cooking chamber having a plurality of regions for arranging the objects to be cooked, a microwave generator that generates microwaves, a current / voltage detector, and a controller. . The current / voltage detector corresponds to a rotating antenna that radiates microwaves to the cooking chamber with directivity, and the current or voltage change of the microwave generator corresponds to the position of the rotating antenna while the rotating antenna rotates at least once. To detect. The control unit determines a position of the rotating antenna at which the microwave generator can obtain an operation efficiency equal to or higher than a predetermined value based on a change in current or voltage, and stops the rotating antenna at the determined position.

The front view of the microwave oven which is one Embodiment of the heating cooker which concerns on this invention. The longitudinal cross-sectional view at the time of seeing the microwave oven of FIG. 1 from the front. The external view of the cooking chamber bottom face of the cooking chamber of a microwave oven. The external view which shows especially the rotation antenna of a microwave oven. The functional block diagram which shows the electric constitution of the microwave oven in this embodiment. The circuit block diagram of the electric current detection circuit provided in a magnetron. The transition diagram explaining the setting procedure of the method of simultaneous warming cooking. The example of a display explaining the other setting procedure of the simultaneous warming cooking using a simultaneous warming key. The example of a display explaining further another setting procedure of simultaneous warming cooking using a simultaneous warming key. The flowchart explaining the flow of the simultaneous warming cooking performed with the microwave oven in this embodiment. The flowchart explaining the flow of the other simultaneous warming cooking performed with the microwave oven in this embodiment.

  An embodiment of a heating cooker according to the present invention will be described with reference to the accompanying drawings.

  Drawing 1 is a front view of microwave oven 1 which is one embodiment of a cooking-by-heating machine concerning the present invention.

  FIG. 2 is a longitudinal sectional view of the microwave oven 1 shown in FIG. 1 when viewed from the front.

  FIG. 3 is an external view of the cooking chamber bottom surface 15 of the cooking chamber 14 of the microwave oven 1.

  FIG. 4 is an external view particularly showing the rotating antenna 36 of the microwave oven 1.

  FIG. 5 is a functional block diagram showing an electrical configuration of the microwave oven 1 in the present embodiment.

  The microwave oven 1 has a main body 10 and a door 11.

  The main body 10 has an inner box 12 (see FIG. 2) and an outer box 13. The inner box 12 forms a cooking chamber 14 in which an object to be cooked is accommodated. The outer box 13 covers the inner box 12 and configures the appearance (outer wall) of the microwave oven 1. The cooking chamber 14 has an opening on the front surface of the microwave oven 1 for taking in and out the food to be cooked.

  The door 11 is attached to the front surface of the main body 10. The door 11 allows the opening of the cooking chamber 14 to be opened and closed by a hinge (not shown) provided at the lower front portion of the main body 10.

  The cooking chamber bottom surface 15 is a surface on which an object to be cooked is arranged. The cooking chamber bottom surface 15 is provided with a region for arranging two items to be cooked. For example, as illustrated in FIG. 3, the cooking chamber bottom surface 15 includes a high temperature side region 15 a in which a high temperature cooking object is disposed and a low temperature side region in which a low temperature cooking object is disposed. 15b. The cooking chamber bottom surface 15 has a high temperature side arrangement mark 16 and a low temperature side arrangement mark 17 indicating a high temperature side region 15a and a low temperature side region 15b, and the marks 16 and 17 are symmetrical on the cooking chamber bottom surface 15. Is displayed. By providing the high temperature side arrangement mark 16 and the low temperature side arrangement mark 17, the arrangement location of the object to be cooked is clearly shown, and it is possible to prevent the user from making a mistake in the arrangement location. This can be prevented from being performed suitably.

  As shown in FIG. 1, an operation unit 20 and a display unit 21 are provided on the right side of the door 11 in the figure.

  The operation unit 20 includes a menu key 25, a dial / decision key 26, a start key 27, and a cancel key 28.

  The menu key 25 is a key for instructing range cooking, oven cooking, steam cooking, and a specific cooking menu in which conditions such as output and time are programmed in advance (for example, “warm drink” and “thaw warming”). It is a key for instructing. In particular, the menu key 25 has a simultaneous warming key 29. The simultaneous warming key 29 is a key for instructing setting of simultaneous warming described later.

  The dial / decision key 26 accepts selection of manual or automatic operation, heating conditions, automatic cooking menu, and the like by rotating the dial. The dial / decision key 26 accepts a selection decision made by a rotation operation by a pressing operation.

  The start key 27 receives the start of operation based on the determined cooking menu, heating mode, and heating condition. The cancel key 28 receives an instruction to cancel the selection or determination that has already been received or to stop the heating operation that has been started. For example, when the cancel key 28 is pressed during the selection of the heating menu or the heating conditions, it receives an instruction to reset the already determined content.

  The display unit 21 displays the selection and setting of the cooking menu performed by the user via the operation unit 20 and the operating state of the microwave oven 1.

  The main body 10 includes heating means such as a magnetron 31, a heater 32, and a steam generating heater 33 as heating means at predetermined positions. The microwave oven 1 can perform cooking such as range cooking, oven cooking, and steam cooking of an object to be cooked accommodated in the cooking chamber 14 by these heating means.

  As shown in FIG. 2, a magnetron 31, a waveguide 35, a rotating antenna 36 and the like are provided inside the main body 10.

  The magnetron 31 (microwave generator) is accommodated at the bottom of the main body 10 between the outer box 13 and the inner box 12 and supplies microwaves from the lower part of the cooking chamber 14. The output of the microwave is controlled according to the power supplied from the inverter 40. The inverter 40 operates based on the operation of the control unit.

  The microwave radiated from the magnetron 31 passes through the waveguide 35 connected to the magnetron 31. The microwave flows from the coupling hole 35 a of the waveguide 35 to the lower surface of the rotating antenna 36 provided at the approximate center of the cooking chamber bottom surface 15. After being agitated by the rotating antenna 36, the microwave passes through the cooking chamber bottom surface 15 and is radiated into the cooking chamber 14.

  The rotating antenna 36 shown in FIG. 4 radiates microwaves to the object to be cooked placed in the cooking chamber 14 by rotating or stopping by the antenna driving unit 41. The rotating antenna 36 is a directional antenna having a directivity in a direction in which, for example, the bottom surface and one end in the horizontal direction are open, and the open end in the horizontal direction faces. The open end in the horizontal direction is set according to various factors such as required directivity.

  The rotary antenna 36 is disposed so as to be located substantially in the center with respect to the cooking chamber bottom surface 15. For this reason, when the rotating antenna 36 rotates, the microwave is evenly irradiated into the cooking chamber 14.

  The antenna driving unit 41 is a motor, for example, and rotates the rotating antenna 36 three times per second. The antenna drive unit 41 rotates and stops the rotating antenna 36 based on the control signal from the control unit 30.

  The antenna position detection unit 42 is, for example, a micro switch or a photo interrupter, and detects the rotation angle and position of the rotating antenna 36. The antenna position detection unit 42 supplies the detection result to the control unit 30.

  The magnetron 31 is provided with a current detection circuit.

  FIG. 6 is a circuit configuration diagram of a current detection circuit provided in the magnetron 31.

  The high-frequency transformer secondary winding 51 increases the power supplied from the inverter 40. The high-voltage power is supplied to the magnetron 31, and the magnetron 31 oscillates microwaves. One terminal of the resistor 52 is connected to the connection line through which the anode current Ib flows. The other terminal of the resistor 52 is grounded, and the control unit 30 detects the anode current Ib of the magnetron 31 based on the voltage generated by the resistor 52 as the current detection unit 43.

  The heater 32 shown in FIG. 5 is provided on the ceiling (upper) of the cooking chamber 14 and performs oven cooking with the radiated heat. The steam generating heater 33 is provided at a predetermined position between the outer box 13 and the inner box 12, and heats water supplied from a tank (not shown) to generate steam. The generated steam is supplied to the cooking chamber 14 from a steam supply port provided on the side surface of the inner box 12, for example.

  The infrared sensor 45 is provided in the upper position of the cooking chamber 14 as shown in FIG. The infrared sensor 45 catches infrared rays in the cooking chamber 14 and detects the temperature in the cooking chamber 14. The infrared sensor 45 is composed of a monocular infrared sensor or a multi-eye infrared sensor.

  The buzzer notification unit 46 outputs a buzzer sound for notifying the user at a predetermined timing based on an instruction from the control unit 30.

  The microwave oven 1 configured as described above can receive the instruction via the simultaneous warming key 29 described above, and can heat the food to be heated simultaneously with high heating efficiency and without uneven temperature. Hereinafter, the operation of the microwave oven 1 will be specifically described.

  First, a setting method for simultaneous warming cooking using the simultaneous warming key 29 will be described. By performing the setting of the simultaneous warming cooking, information on an object to be cooked for use in controlling the rotating antenna 36 described later can be acquired from the user. The control unit 30 can control the microwave so that the cooking object is suitably heated according to the type and temperature state of the cooking object.

  FIG. 7 is a transition diagram illustrating the setting procedure of the method of simultaneous warming cooking. 7A to 7C show display examples of the display unit 21 when the simultaneous warming key 29 is operated. The display unit 21 is provided with a “simultaneous warming” display area and displays a plurality of simultaneous warming menus. In this table area, the temperature state of the cooking object arranged in the high temperature side area 15a of the cooking chamber bottom surface 15 is displayed on the left side, and the temperature state of the cooking object arranged in the low temperature side area 15b is displayed on the right side. . Each simultaneous warming menu is provided with a selection display 61 (in FIG. 7, the selected state is a black circle and the non-selected state is a white circle) indicating that it has been selected by the user's operation.

  When the simultaneous warming key 29 of the menu key 25 is pressed and simultaneous warming cooking is instructed, the control unit 30 simultaneously warms up the food to be cooked at room temperature and frozen state in each area on the display unit 21. Accepts selection of simultaneous warming menu for cooking. The user presses the simultaneous warming key 29 a plurality of times and selects a desired simultaneous warming menu.

  Thereafter, when the user presses the start key 27, the control unit 30 starts simultaneous warming cooking based on the selected simultaneous warming menu. Based on the selected simultaneous warming menu, the control unit 30 performs heating control, which will be described later, so as to complete cooking of the cooking objects respectively arranged in the high temperature side region 15a and the low temperature side region 15b.

  FIG. 8 is a display example for explaining another setting procedure of simultaneous warming cooking using the simultaneous warming key 29.

  In the table area of “Simultaneous heating” on the display unit 21, the name of the cooked food in the high temperature state is displayed on the left side and the name of the cooked food in the low temperature state is displayed on the right side, as in FIG. Specifically, on the left side of the display area, the names and temperature states of the objects to be arranged in the high temperature side area 15a of the cooking room bottom surface 15 are “room temperature curry stew”, “room temperature side dish”, “room temperature rice”. "Is displayed. On the right side, the names of cooked foods and the temperature conditions arranged in the low temperature side area 15b are “Frozen rice”, “Refrigerated rice”, “Frozen rice”, “Refrigerated rice”, “Refrigerated curry stew” Is displayed.

  Furthermore, when two simultaneous warming keys 29 are provided, simultaneous warming cooking can be set as follows.

  FIG. 9 is a display example illustrating still another setting procedure for simultaneous warming cooking using the simultaneous warming key 29.

  In the surface area of “Simultaneous warming” on the display unit 21, the name of the cooked object in the high temperature state is displayed on the left side, and the name of the cooked object in the low temperature state is displayed on the right side. Unlike the setting procedure shown in FIGS. 7 and 8, the user can freely set the combination of the items to be arranged in the high temperature side region 15a and the low temperature side region 15b.

  Specifically, on the left side of the display area, an object to be disposed in the high temperature side area 15a of the cooking chamber bottom surface 15a that can be selected by the simultaneous warming key 29a as the first simultaneous warming key (simultaneous warming key 1). The name of the food to be cooked and the temperature state are displayed. Specifically, it is displayed as “refrigerated rice”, “frozen rice”, “room temperature rice”. On the right side, the name of the food to be cooked and the temperature state of the food to be arranged in the low temperature side region 15b that can be selected by the simultaneous warming key 29b as the second simultaneous warming key (simultaneous warming key 2) are displayed. Is done. Specifically, “Okazu chilled”, “Okazu room temperature”, “Curry and stew refrigerated”, “Curry and stew room temperature”, “Sashimi thaw” are displayed.

  In the setting procedure of the simultaneous warming cooking shown in FIG. 8 and FIG. 9, the simultaneous warming menu is sequentially selected by pressing the simultaneous warming keys 29, 29a, 29b as in the case of FIG. Thereafter, when the start key 27 is pressed, simultaneous warming cooking is started based on the selected simultaneous warming menu.

  The control unit 30 holds in advance cooking conditions such as output and heating time according to the simultaneous warming menu that can be set by the user. For example, when a simultaneous warming menu in which a “room temperature” food item is arranged in the high temperature side region 15a and a “freezer” food item is arranged in the low temperature side region 15b is set, the high temperature side region 15a and the low temperature side region 15b The output ratio is set to 1: 3. Further, when a simultaneous warming menu is set in which the “room temperature” cooked food is set in the high temperature side region 15a and the “refrigerated” cooked food is placed in the low temperature side region 15b, the high temperature side region 15a and the low temperature side region 15b The output ratio is set to 1: 1.5. Further, when a simultaneous warming menu is set in which a “refrigerated” food item is arranged in the high temperature side region 15a and a “frozen” food item is arranged in the low temperature side region 15b, the high temperature side region 15a and the low temperature side region 15b The output ratio is set to 1: 2. About the heating time of each area | region 15a, 15b, it sets so that the heating of the to-be-cooked object arrange | positioned in the high temperature side area | region 15a and the low temperature side area | region 15b may be completed simultaneously.

  Also for the simultaneous warming menu set by the method described with reference to FIGS. 8 and 9, the output and the heating time required for completing the cooking are preferably obtained in advance by experiments, and the control unit 30 determines the cooking conditions. Hold.

  The heating speed of the food to be cooked varies depending not only on the temperature state of the food to be cooked but also on the amount of juice. For example, a material with a high sap, such as curry or stew, and a food with a low sap, such as rice, have different heating rates even if the temperature is the same. For this reason, like the setting method shown in FIG. 8 and FIG. 9, the controller 30 can determine the name of the cooking object by setting the cooking object name and the simultaneous warming key 29. Simultaneous warming cooking can be performed under suitable conditions.

  Based on the simultaneous warming menu set by the user as described above, the control unit 30 performs the rotation / stop control of the rotating antenna 36 described below while controlling the output of the microwave, thereby improving the power efficiency. Cook with heat.

  FIG. 10 is a flowchart for explaining the flow of simultaneous warming cooking executed by the microwave oven 1 in the present embodiment.

  In step S <b> 1, the control unit 30 determines whether a simultaneous warming menu is set via the simultaneous warming key 29 and an instruction to start simultaneous warming cooking is received from the user via the start key 27. When it determines with the control part 30 not receiving the instruction | indication which starts simultaneous warming cooking, it waits until it receives an instruction | indication.

  When it is determined that the control unit 30 has received an instruction to start the simultaneous warming cooking, the magnetron 31 is operated in step S2. In step S <b> 3, the control unit 30 starts rotating the rotating antenna 36.

  In step S4, the control unit 30 acquires the anode current Ib detected by the current detection unit 43. For example, the control unit 30 acquires the anode current Ib every predetermined time. In step S <b> 5, the control unit 30 determines whether or not the rotating antenna 36 has made one rotation based on the detection result of the antenna position detection unit 42. That is, it is determined whether or not the anode current Ib has been detected at all rotation positions that can be taken by all the rotation antennas 36. When it is determined that the rotating antenna 36 has not made one rotation, the control unit 30 returns to the current acquisition step S4 and continuously acquires the anode current Ib until the rotating antenna 36 makes one rotation.

  When the control unit 30 determines that the rotating antenna 36 has made one rotation, in step S6, the anode current Ib when the directivity of the rotating antenna 36 is directed toward the high temperature side region 15a and when the directivity is directed toward the low temperature side region 15b. Each of the positions of the rotating antennas 36 at which is maximized is obtained. The position where the anode current Ib is maximized is a position where the impedance in the cooking chamber 14 is reduced. That is, the position of the rotating antenna 36 at which the anode current Ib is maximized is a position at which the microwave oven 1 can be operated most efficiently.

  When the directivity of the rotating antenna 36 is directed to the high temperature side region 15a, the horizontal open end of the rotating antenna 36 is directed to the left half region of FIG. When the directivity of the rotating antenna 36 is directed to the low temperature side region 15b, the horizontal open end of the rotating antenna 36 is directed to the right half region of FIG.

  Note that the control unit 30 is not limited to the position of the rotating antenna 36 at which the anode current Ib is maximized, and a position where the anode current Ib of a predetermined value or more is obtained and the change rate of the anode current Ib is small between the front and rear positions. You may ask for.

  Since the relationship between the anode current corresponding to the position of the rotating antenna 36 and the heating efficiency is described in detail in Japanese Patent Application Laid-Open No. 2000-164335, detailed description thereof is omitted here.

  In this position detection step S6, an anode current Ib that changes according to the position of the rotating antenna 36 is obtained. However, when an abnormality occurs in the electric circuit or the like in the microwave oven 1, the anode current Ib does not change. Therefore, when there is no change in the anode current Ib, the control unit 30 may notify the user of the abnormality by outputting an error display and a buzzer sound on the display unit 21.

  In step S7, the control unit 30 stops the rotating antenna 36 at a position where the anode current Ib of the low temperature side region 15b becomes the maximum value. Thereby, the to-be-cooked object arrange | positioned at the low temperature side area | region 15b is cooked intensively by the directivity of the rotation antenna 36, and efficient operation.

  In step S <b> 8, the control unit 30 displays “antenna stopped” on the display unit 21. Further, instead of or in addition to the “antenna stopped” display, a display indicating that an operation with good driving efficiency is being performed (for example, “eco-driving”) may be performed. In step S9, the control unit 30 controls the inverter 40 according to the simultaneous warming menu set by the user, so that the output of the magnetron 31 suitable for the food to be cooked arranged in the low temperature side region 15b is obtained. change.

  In step S10, the control unit 30 determines whether or not a predetermined time T1 preset in accordance with the simultaneous warming menu has elapsed. The predetermined time T1 is a time that is set so that the food to be cooked arranged in the low temperature side region 15b is suitably heated and cooked, for example, experimentally obtained in advance. When determining that the time T1 has not elapsed, the control unit 30 returns to the display step S8 and repeats the steps S8 to S10 until the time T1 elapses.

  When it is determined that the time T1 has elapsed, the control unit 30 stops the rotating antenna 36 at a position where the anode current Ib of the high temperature side region 15a reaches the maximum value in step S11. Thereby, the to-be-cooked object arrange | positioned at the high temperature side area | region 15a is cooked intensively by the directivity of the rotation antenna 36, and efficient operation.

  In step S <b> 12, the control unit 30 displays “antenna stopped” on the display unit 21. This is the same as the display step S8. In step S13, the control unit 30 controls the inverter 40 according to the simultaneous warming menu set by the user, thereby changing the output to the magnetron 31 suitable for the food to be cooked arranged in the high temperature side region 15a. .

  In step S14, the control unit 30 determines whether or not a predetermined time T2 set in advance according to the simultaneous warming menu has elapsed. The predetermined time T2 is a time that is set so that the food to be cooked arranged in the high temperature side region 15a is suitably heated and cooked, for example, experimentally obtained in advance. When it is determined that the time T2 has not elapsed, the control unit 30 returns to the display step S12 and repeats the steps S12 to S14 until the time T2 elapses.

  When it is determined that the time T2 has elapsed, the control unit 30 rotates the rotating antenna 36 in step S15 to uniformly heat the inside of the cooking chamber 14. By rotating the rotating antenna in the antenna rotating step S15, temperature unevenness due to local heating of the object to be cooked can be suppressed.

  In step S <b> 16, the control unit 30 determines whether or not the cooking object has been heated. For example, when the temperature of the object to be cooked detected by the infrared sensor 45 reaches a desired temperature, the control unit 30 determines that the heating of the object to be cooked is completed. When it is determined that the heating is not completed, the control unit 30 returns to the antenna stop step S7 and repeats the subsequent processes. In addition, when heating is not completed, you may return to antenna stop step S7, and you may return to antenna rotation step S15, and may perform the heating cooking in the state where the rotation antenna 36 was rotated.

  When it is determined that the cooking is completed in the completion determination step S <b> 16, the control unit 30 outputs a buzzer sound from the buzzer notification unit 46 to notify the user that the cooking has been completed.

  In this simultaneous warming cooking, the antenna rotation step S15 is performed. However, the cooking may be performed only in the stopped state without rotating the rotating antenna 36. Further, inverter control steps S9 and S13 may be omitted. Further, instead of measuring the anode current Ib, the anode voltage Eb may be measured to determine the stop position of the rotating antenna 36 that can be operated with high efficiency.

  In the simultaneous warming cooking described with reference to FIG. 10, the region to be heated intensively is switched as the predetermined times T1 and T2 elapse. In addition, you may switch the area | region heated intensively based on the temperature of the to-be-cooked object detected as demonstrated below.

  FIG. 11 is a flowchart for explaining the flow of other simultaneous warming cooking executed by the microwave oven 1 in the present embodiment.

  Steps S21 to S29 are substantially the same as start determination step S1 to inverter control step S9 in FIG.

  In step S30, the control unit 30 prepares the food to be cooked arranged in the low temperature side region based on the detection result of the temperature of the food to be cooked arranged in the low temperature side region 15b and the high temperature side region 15a obtained from the infrared sensor 45. It is determined whether the temperature of the object is higher than the temperature of the object to be cooked arranged in the high temperature region. That is, the control unit 30 determines whether or not the temperature of the object to be cooked is reversed compared to that before cooking. When the controller 30 determines that the temperature of the food to be cooked arranged in the low temperature region 15b is lower than the temperature of the food to be cooked arranged in the high temperature region 15a, the control unit 30 returns to the display step S28 until the temperature becomes high. Steps S28 to S30 are repeated.

  When the control unit 30 determines that the temperature of the food to be cooked arranged in the low temperature side region 15b is higher than the temperature of the food to be cooked arranged in the high temperature side region 15a, in step S31, the control unit 30 moves the rotating antenna 36 to the high temperature side region. It stops at the position where the anode current Ib of 15a becomes the maximum value.

  Steps S32 and S33 are the same as the display step S12 and the inverter control step S13 in FIG.

  In step S <b> 34, the control unit 30 detects the temperature of the cooking object disposed in the high temperature side region 15 a based on the detection result of the temperature of the food disposed in the low temperature side region 15 b and the high temperature side region 15 a obtained from the infrared sensor 45. It is determined whether the temperature of the food is higher than the temperature of the food to be cooked arranged in the low temperature side region 15b. When the controller 30 determines that the temperature of the food to be cooked arranged in the high temperature region 15a is lower than the temperature of the food to be cooked arranged in the low temperature region 15b, the control unit 30 returns to the display step S32 until the temperature becomes high. Steps S32 to S34 are repeated.

  When the controller 30 determines that the temperature of the food to be cooked arranged in the high temperature region 15a is higher than the temperature of the food to be cooked arranged in the low temperature region 15b, the heating of the food to be cooked is completed in step S35. It is determined whether or not When it is determined that the heating has not been completed, the control unit 30 returns to the antenna stop step S27 and repeats the subsequent processes.

  When it is determined in the completion determination step S35 that the cooking has been completed, the control unit 30 outputs a buzzer sound from the buzzer notification unit 46 to notify the user that the cooking has been completed.

  In addition, also in the simultaneous warming cooking of FIG. 11, generation | occurrence | production of the temperature nonuniformity by local heating can be prevented by rotating the rotation antenna 36 suitably.

  Moreover, although completion of heating cooking was judged according to the temperature of the to-be-cooked object acquired with the infrared sensor 45, you may judge with a steam sensor. By detecting the generation of steam in the cooking chamber 14 by the steam sensor, it is possible to detect that the heating of the object to be cooked is completed. By providing an inexpensive vapor sensor instead of the infrared sensor 45, the manufacturing cost can be reduced.

  According to the microwave oven 1 in the present embodiment, since heating is performed at the stop position of the rotating antenna 36 having excellent operation efficiency in each of the high temperature side region 15a and the low temperature side region 15b, energy saving can be realized and at the same time Even in warm cooking, the food to be cooked can be cooked suitably without uneven temperature.

  Moreover, since the microwave oven 1 can grasp | ascertain the state of a to-be-cooked object and the kind of to-be-cooked beforehand with the simultaneous warming key 29, the suitable microwave according to to-be-cooked in the high temperature side area | region 15a and the low temperature side area | region 15b. Output can be determined. For this reason, the microwave oven 1 can heat a to-be-cooked object in a more suitable state.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 Microwave oven 10 Main body 14 Cooking room 15 Cooking room bottom surface 15a High temperature side area 15b Low temperature side area 16 High temperature side arrangement mark 17 Low temperature side arrangement mark 20 Operation part 21 Display part 30 Control part 31 Magnetron 35 Waveguide 36 Rotating antenna 40 Inverter 41 Antenna Drive Unit 42 Antenna Position Detection Unit 43 Current Detection Unit 51 High Frequency Transformer Secondary Winding 45 Infrared Sensor 46 Buzzer Notification Unit

Claims (5)

A main body having a cooking chamber having a plurality of areas for arranging the objects to be cooked;
A microwave generator for generating microwaves;
A rotating antenna that radiates the microwave generated by the microwave generator to the cooking chamber with directivity;
A current / voltage detector that detects a change in the current or voltage of the microwave generator in association with the position of the rotating antenna while the rotating antenna rotates at least once;
Based on the change in the current or voltage detected by the current / voltage detection unit, the microwave generator determines the position of the rotating antenna at which a driving efficiency of a predetermined value or more is obtained, and the determined position is A heating cooker comprising: a control unit that stops the rotating antenna. The cooking device according to claim 1, wherein the control unit changes the stop position of the rotating antenna between the regions when a predetermined time has elapsed. The cooking device according to claim 1, wherein the control unit changes a stop position of the rotating antenna between the regions when there is a predetermined change in the temperature of each of the regions. The cooking device according to claim 1, wherein the control unit further includes a display unit for displaying that the rotating antenna is stopped and that the driving efficiency is good while the rotating antenna is stopped. The cooking device according to claim 1, wherein an output of the microwave generator is changed between the plurality of regions.

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