JP2010270918A - Induction heating cooker - Google Patents

Abstract

An object of the present invention is to reduce the electric power used for cooking by eliminating overshoot without lengthening the preheating time of the heating chamber, and to keep the temperature of the heating chamber at the heating temperature inputted from the operation unit. And a control means 72 for ON / OFF control of the heating means, and the object to be heated is cooked through a preheating step for preheating the heating chamber 28 by the heating means 12 and a main step for cooking the object to be heated. In the cooking device having an oven heating function, in the preheating step, the control means 72 performs an energization rate of power to the heating means 12 at 100%, and the temperature detected by the temperature detecting means 85 is the input. Preheating is terminated when a detected value lower than the heating temperature by a certain temperature is detected, and in this step, the power supply rate to the heating means 12 is changed according to the heating temperature. , Wherein the controlling ON / OFF of the heating means 12 so that the temperature detected by said temperature detecting means 85 coincides with the heating temperature inputted from the operation unit 6.
[Selection] Figure 9

Description

  The present invention relates to a cooking device provided with an oven heating means using a heater.

  In a heating cooker equipped with an oven heating function for heating and cooking the heated object through the preheating process for preheating the heating chamber and the main process for cooking the heated object, the heating chamber is heated by heating means during the preheating process. The temperature of the heating chamber is different from the temperature detected by the temperature detecting means because the conduction of heat to the temperature detecting means for detecting the temperature of the heating chamber is delayed relative to the temperature of the heating chamber. Due to the delay in the power cutoff (OFF) control to the heating means for heating, an overshoot in which the temperature of the heating chamber rises above the heating temperature may occur, thereby increasing the preheating time of the heating chamber. There arises a problem that electric power used for cooking increases.

  Thus, for example, there is a technique described in Patent Document 1 as a countermeasure for these problems.

  When the temperature detected by the temperature detection element (temperature detection means) reaches a level at which the heating unit is turned off, the high-frequency heating cooker described in Patent Document 1 turns off the heating unit for a certain period of time, and heats after a certain period of time has elapsed. It is a high-frequency heating cooker that heats up gradually until it reaches the target temperature by repeating the ON-OFF operation after that, and when it reaches the target temperature, it keeps the target temperature level constant after reaching the target temperature. .

JP-A-63-170882

  In recent years, in cookers equipped with oven heating means, there has been an increasing awareness of shortening cooking time and saving power used for cooking.

  However, since the above-described Patent Document 1 repeats the ON-OFF operation of the heating unit and gradually heats the heating chamber to reach the target temperature and eliminates overshoot, It takes a lot of time to raise the temperature, and there is a problem that the electric power used for cooking increases.

The present invention has been made to solve the above-described problem, and includes a heating chamber for cooking the object to be heated, a heating unit for heating the object to be heated, and temperature detection for detecting the temperature of the heating chamber. Means, an operation unit for inputting a heating temperature and a heating time for heating the object to be heated, and the input heating temperature so as to keep the temperature of the heating chamber at the heating temperature input from the operation unit. And a control means for controlling ON / OFF of the heating means, and a preheating step for preheating the heating chamber by the heating means and cooking the object to be heated. In a heating cooker equipped with an oven heating function to cook an object to be heated through this step,
In the preheating step, the control means performs an energization rate of power to the heating means at 100%, and detects the temperature detected by the temperature detecting means lower than the input heating temperature by a certain temperature. Preheating is terminated when a value is detected, and in this step, the power supply rate to the heating means is changed according to the heating temperature, and the temperature detected by the temperature detection means is input from the operation unit. The heating means is ON / OFF controlled so as to coincide with the heating temperature.

  According to the present invention, cooking can be performed without increasing the preheating time of the heating chamber, thereby reducing the electric power used for cooking.

It is the perspective view which looked at the main part of the cooking-by-heating machine of Example 1 from the front side. It is the perspective view which looked at the main part of the cooking-by-heating machine of Example 1 from the back side. It is AA sectional drawing of FIG. It is a perspective view of the state which opened the door of the heating cooker of Example 1, and can see the inside of a main body. It is a perspective view in the state where the back inside of the main part of the cooking-by-heating machine of Example 1 can be seen. It is a perspective view which shows schematic structure inside the hot air unit of the heating cooker of Example 1. FIG. It is a block diagram for demonstrating the control circuit of the heating cooker of Example 1. FIG. It is the figure which showed the heating temperature and control value of the heating cooker of Example 1. FIG. It is explanatory drawing of the heater heating process at the time of oven heating of the heating cooker of Example 1. FIG. In the cooking-by-heating machine of Example 1, it is a perspective view of the state which mounted the to-be-heated material in the square plate. It is sectional drawing of the heating cooker of Example 2. FIG. It is explanatory drawing of the heater heating process showing the heating cooker of Example 2. FIG.

  Embodiments of the present invention will be described below with reference to the drawings.

  In FIG. 1, the main body 1 of the heating cooker puts food to be cooked in a heating chamber 28, and cooks the food using microwaves, the heat of the heater, saturated steam, or superheated steam.

  The door 2 opens and closes to put food in and out of the heating chamber 28. By closing the door 2, the heating chamber 28 is hermetically sealed to prevent leakage of microwaves used when cooking food. The heat and superheated steam are contained and cooking can be performed efficiently.

  The handle 9 is attached to the door 2 and facilitates opening and closing of the door 2, and has a shape that can be easily grasped by a hand.

  The glass window 3 is attached to the door 2 so that the state of the food being cooked can be confirmed, and uses glass that can withstand high temperatures due to heat generated by a heater or the like.

  The operation unit 6 is provided on the operation panel 4 below the front surface of the door 2. The operation unit 6 includes a microwave heating setting key 6a for setting microwave heating and a heater heating setting key 6b for setting oven heating with preheating. A key for selecting cooking such as heating, a setting dial 6d for inputting a heating temperature and a heating time when heater heating is selected, and a start key 6c for starting cooking.

  The display unit 5 displays the contents input from the operation unit 6 and the progress of heating.

  The water tank 42 is a container for storing water necessary for producing saturated water vapor. The water tank 42 is provided on the lower side of the front surface of the main body 1 of the heating cooker, and is configured to be detachable from the front surface of the main body 1. And drainage can be done easily.

  The outer frame 7 is a cabinet that covers the upper surface and the left and right side surfaces of the main body 1 of the heating cooker.

  In FIG. 2, the rear plate 10 forms the rear surface of the cabinet described above, and an external exhaust duct 18 is attached to the upper part, and the steam discharged from the food and the main body 1 are installed inside the external exhaust duct 18. An exhaust hole 36 for discharging cooling air (waste heat) 39 after cooling the internal components is provided.

  The external exhaust duct 18 discharges the cooling air (waste heat) that has passed through the exhaust hole 36 to the outside of the main body 1. The exhaust is discharged from the external exhaust port 8 of the external exhaust duct 18, and the exhaust discharge direction Exhausts toward the top of the body 1 and to the front side. The exhaust direction is directed upward and toward the front side, so that the wall surface is not contaminated by the exhaust even when the rear surface is brought close to the wall surface.

  In FIG. 3, the machine room 20 is provided in a space between the heating chamber bottom surface 28 a and the bottom plate 21 of the main body 1, and a magnetron 33 for heating food and a guide connected to the magnetron 33 are heated on the bottom plate 21. The wave tube 47, the control board 23, other various components described later, a fan device 15 for cooling these various components, and the like are attached.

  The heating chamber bottom surface 28a has a substantially concave central portion, in which the rotating antenna 26 is installed, and the microwave energy radiated from the magnetron 33 is output from the waveguide 47 and the rotating antenna driving means 46. It flows into the lower surface of the rotating antenna 26 through the opening 47a through which 46a passes, and is diffused by the rotating antenna 26 and radiated to the heating chamber 28. The rotating antenna 26 is connected to the output shaft 46 a of the rotating antenna driving means 46.

  In FIG. 4, the fan device 15 sucks outside air from the bottom plate 21 and blows cooling air 39 from the blowout port 53, cools the magnetron 33, the inverter board 22, the weight detection means 25, etc. that self-heats in the machine room 20, It flows between the outside of the heating chamber 28 and the outer frame 7 and between the hot air case 11 a and the rear plate 10, passes through the exhaust hole 36 while cooling the outer frame 7 and the rear plate 10, and the external exhaust port 8 of the external exhaust duct 18. More discharged.

  A hot air unit 11 is attached to the rear of the heating chamber 28, a hot air fan 32 that efficiently circulates the air in the heating chamber 28 is attached in the hot air unit 11, and an air passageway is provided on the heating chamber inner wall surface 28 b. A hot air intake hole 31 and a hot air blowing hole 30 are provided.

  The heating means 12 is a heater for heating the heating chamber 28, and includes a grill heating means 12a (power consumption 650W) and an oven heating means 12b (power consumption 680W).

  In the present embodiment, the oven heating means 12b is provided in the hot air unit 11 and rotates the hot air fan 32 by driving a hot air motor 13 attached to the outside of the hot air case 11a, and the air circulating in the oven heating means 12b is supplied. Heat.

  The hot air unit 11 is provided with a hot air case 11a on the rear side of the heating chamber inner wall surface 28b, and the oven heating means is positioned between the heating chamber inner wall surface 28b and the hot air case 11a so as to be positioned on the outer peripheral side of the hot air fan 32. The hot air motor 13 is attached to the rear side of the hot air case 11a, and the motor shaft is connected to the hot air fan 32 through a hole provided in the hot air case 11a.

  The hot air motor 13 is surrounded by a hot air motor cover 17 to prevent the temperature from rising due to heat from the heating chamber 28 and the oven heating means 12b.

  The cooling duct 16 is formed in a substantially cylindrical shape and is positioned between the hot air case 11 a and the rear plate 10, the upper end opening is connected to the lower surface of the hot air motor cover 17, and the lower end opening is blown out from the fan device 15. A part of the cooling air 39 from the fan device 15 is connected to the port 53 and is taken into the hot air motor cover 17.

  A grill heating means 12 a is attached to the back side of the top surface of the heating chamber 28. The grill heating means 12a winds a heater wire around a mica plate to form a flat surface, presses and fixes the top surface of the heating chamber 28, and heats the top surface of the heating chamber 28 so that the food in the heating chamber 28 is heated. It is baked by radiant heat.

  Further, a temperature detection means 85 for detecting the temperature of the heating chamber 28 is provided above the rear portion of the heating chamber 28.

  The temperature detecting means 85 is provided at a position not directly affected by hot air blown into the heating chamber 28 from the hot air blowing hole 30 of the grill heating means 12a and the hot air unit 11.

  The temperature detection means 85 uses a thermistor whose resistance value changes with temperature (the resistance value decreases as the detection temperature increases).

  On the other hand, the heating chamber bottom surface 28a is provided with a plurality of weight detection means 25, for example, a right weight sensor 25a and a left weight sensor 25b on the front left and right sides, and a back weight sensor 25c on the rear center. Is placed.

  The table plate 24 is for placing food, has heat resistance so that it can be used for both heater heating and microwave heating, has good microwave permeability, and has no problem in terms of hygiene. It is molded with materials such as porcelain.

  Depending on the type of cooking, the table plate 24 is used by being placed on upper, middle, and lower multi-stage (three stages in the figure) shelves 27 provided on the left and right side surfaces of the heating chamber 28.

  In addition to the table plate 24, a square dish 50 (FIG. 10) is used according to the type of cooking.

  In FIG. 5, the water vapor generating means 43 is attached to the outer surface of the hot air case 11 a of the hot air unit 11, and the jet port 44 for ejecting saturated water vapor faces the hot air unit 11.

  Further, the water vapor generating means 43 is made of aluminum, and a sheathed heater as a boiler heating means 89 is embedded so as to be integrated at the time of casting. The power consumption of the heater is as large as around 600 W, and the water vapor generating means 43 can be heated to a temperature at which water can be boiled in a short time.

  The water supply to the water vapor generating means 43 is supplied from the water tank 42 through the pipe 45 by driving the pump means 87. The supplied water is heated and boiled by the water vapor generating means 43, becomes saturated water vapor, and is ejected from the ejection port 44.

  The temperature detection means B88 detects the temperature of the water vapor generation means 43, transmits the detection result to the control means 72 described later, and controls the boiler heating means 89 and the pump means 87.

  The pump means 87 pumps the water in the water tank 42 to the water vapor generating means 43, and is composed of a pump and a motor that drives the pump. The adjustment of the amount of water supplied to the water vapor generating means 43 is determined by the ON / OFF ratio of the power supplied to the motor.

  Next, the detailed internal structure will be described mainly with reference to FIGS.

  Details of the hot air unit 11 will be described with reference to FIG.

  The hot air unit 11 is provided with a hot air fan 32 at a substantially central portion, and as shown in FIG. 3, the air in the heating chamber 28 is circulated through the hot air intake hole 31 and the hot air outlet hole 30 provided in the heating wall inner wall surface 28b. . The hot air fan 32 rotates by driving of the hot air motor 13 attached to the outside of the hot air case 11a.

  Inside the hot air unit 11, a heater which is a horizontally long oven heating means 12 b is provided so as to be positioned below the hot air fan 32, and the air sucked by the hot air fan 32 is placed in the hot air intake hole 31 on the upper and left and right sides. A wind guide plate 11b for blowing air uniformly from the hot air blowing holes 30 provided on the lower side and the upper side is attached.

  Thus, the hot air unit 11 heats the heating chamber 28 by sucking the air in the heating chamber 28 with the hot air fan 32, heating the sucked air with the oven heating means 12b, and then repeatedly sending air to the heating chamber 28. To do.

  Therefore, when the saturated water vapor generated by the water vapor generating means 43 is blown into the hot air unit 11 from the outlet 44 when the oven heating means 12b in the hot air unit 11 is ON and generating heat, the saturated water vapor is converted into a hot air fan. 32, and heated to a high temperature of 100 ° C. or higher by the heat of the oven heating means 12b (surface temperature of 500 ° C. or higher) to become superheated steam, mixed with hot air and blown into the heating chamber 28 to heat the object to be heated. .

  Next, an operation block diagram of the entire cooking device system will be described with reference to FIG.

  In the figure, a power source 76 is a commercial power source and is connected to the control means 72 via the current detection means A75.

  The current detection means A75 detects the current used in the main body 1 of the heating cooker, and detects the change in current when the voltage of the power source 76 fluctuates and adjusts the heating output to be constant. Used to do.

  The range heating means 77 is an inverter board 22 on which an inverter circuit that creates a power source for driving the magnetron 33 and the magnetron 33 is mounted. The inverter circuit creates a power supply corresponding to the heating power input from the operation unit 6 via the control means 72 and applies it to the magnetron 33. As described above, the generated power supply monitors the power supply 76 with the detection signal from the power supply detection means 75 so that the microwave output of the magnetron 33 is not affected by the fluctuation of the power supply 76, and corrects the fluctuation of the power supply 76 with the output. To work.

  The grill heating means 12a heats the top surface of the heating chamber 28 to bake the food in the heating chamber 28 by radiant heat.

  The illumination means 81 is provided outside the heating chamber 28 and illuminates the heating chamber 28 from a small hole provided in the wall surface of the heating chamber 28 so that the state of the food being heated can be easily seen.

  The cooling means 53 is a motor that drives a fan for cooling the fan device 15.

  The rotating antenna driving means 46 is a motor for driving the rotating antenna 26, and a synchronous motor and a gear for reducing the rotational speed are integrated.

  The temperature detecting means B88 detects the temperature of the water vapor generating means 43.

  The boiler heating unit 89 heats the water vapor generating unit 43.

  The temperature detection means 85 uses a thermistor whose internal resistance changes as the heating chamber 28 is heated by the heating means 12, and the resistance value of the thermistor changes according to the temperature of the heating chamber 28, and the resistance value becomes a voltage. The converted value is input to the control means 72 as a detected value.

  The detection value input to the control means 72 is converted into a digital value and the temperature of the temperature detection means 85 is detected.

  The control means 72 operates to cook food according to the contents input from the operation unit 6, and the state of the food and the heating chamber 28 are detected by detection means such as the weight detection means 25 and the temperature detection means 85. Then, the heating means 12 such as the oven heating means 12b and the grill heating means 12a and the driving means such as the hot air motor 13 are operated as necessary.

  The present embodiment is configured as described above. Next, cooking by oven heating will be described with reference to FIG. 8, FIG. 9, and FIG.

  FIG. 8 shows a control value (displayed in hexadecimal notation) that serves as a reference for controlling the heating temperature and energization to the heating means 12 at that time, and a control value (displayed in hexadecimal notation) for shifting from the preheating process to this process. FIG. 9 shows the preheating process during oven heating and the temperature state of this process.

  For setting, the heater heating setting key 6b is used to select oven heating with preheating, and the setting dial 6d is turned while inputting the heating temperature and the heating time while viewing the display unit 5.

  The heating temperature is a temperature at which the heating chamber 28 can be heated, and the temperatures that can be set from the setting dial 6d are 250 ° C. and 300 ° C. in increments of 10 ° C. from 100 ° C.

  In this embodiment, the heating temperature is 180 ° C. and the heating time is 20 minutes.

  This setting includes a preheating process for heating the heating chamber 28 to a heating temperature of 180 ° C. and a main process for heating the object to be heated while maintaining the heating chamber 28 at 180 ° C. after the preheating is completed.

  In the preheating step and the main step, the energization rate of power to the heating means 12 is different.

  In the preheating step, the power supply rate to the grill heating unit 12a and the oven heating unit 12b is 100% regardless of the heating temperature. In this step, the power supply rate to the oven heating unit 12b is independent of the heating temperature. 100%, the energization rate to the grill heating means 12a is changed according to the heating temperature.

  The energization rate may be changed by an average value by power ON / OFF control, or may be changed by phase control using a triac or the like.

  The reason for this is to reduce the temperature difference between the temperature rise of the heating chamber 28 and the temperature detecting means 85 and to suppress the uneven heating of the heated object 51 to be cooked in this process, while suppressing the overheating of the surface of the heated object. This is to let the inside pass fire.

  For example, ingredients cooked in a low temperature range of 100 to 180 ° C. when cooking like a cake are easy to burn the surface of the ingredients, so set the current rate in this process low, like meat The ingredients cooked in a high temperature range of 220 to 300 ° C. when cooking at a high temperature are set to a high energization rate in this step in order to bake the ingredients firmly.

  And the setting of an electricity supply rate confirms the state of cooking in advance, when the heating temperature is 100 to 180 ° C, the electricity supply rate is 25%, when it is 190 to 210 ° C, the electricity supply rate is 40%, and when it is 220 to 300 ° C. Is stored in the control means 72 as an energization rate of 70%.

  In the preheating process, the start key 6c is input with only the table plate 24 in the heating chamber 28, and preheating is started.

  When preheating is started, electric power of 100% energization is applied to both the grill heating means 12a and the oven heating means 12b used in the preheating process, and at the same time, the hot air motor 13 is operated to rotate the hot air fan 32.

  The rotating hot air fan 32 causes the heat of the oven heating means 12 b to circulate through the heating chamber 28 and heat the heating chamber 28.

  Since the temperature of the heating chamber 28 immediately after the start of heating is the same as the room temperature where the cook lives, the detected value input from the temperature detecting means 85 is a small value indicating that the temperature is low. Entered.

  The control value is set by the setting dial 6d and the temperature of the heating chamber 28 that is input from the temperature detecting means 85 to the control means 72 by controlling the energization to the heating means 12 to heat the heating chamber 28. It is a numerical value obtained in advance by an experiment so that the heating temperature matches.

  The control value is “2C” when the set heating temperature is 100 ° C., and “A4” when the heating temperature is 200 ° C., and the control value increases as the heating temperature increases in the circuit configuration of FIG.

  The control means 72 sequentially detects the detection value input from the temperature detection means 85, and when the detection value detects a value smaller than the control value of the heating temperature of 180 ° C., the power supply to the heating means 12 is turned ON, and heating is performed. Warm chamber 28. Thereafter, the temperature of the heating chamber 28 rises, and when the detected value from the temperature detecting means 85 detects “8E” or more that is +1 larger than the reference value “8D”, the power supply to the heating means 12 is turned off, and the heating chamber 28 is turned off. When the detected temperature is less than “8C”, which is −1 smaller than the reference value “8D”, the power to the heating means 12 is turned on to heat the heating chamber 28 again. By repeating this control, the heating temperature of 180 ° C. is maintained.

  Further, the preheating end control value is a value of a detection value of the temperature detecting means 85 for increasing the temperature of the heating chamber 28 and ending the preheating process and proceeding to the present process.

  For example, the preheating end control value when the heating temperature is set to 180 ° C. is “88”, and when this value is detected, the preheating process is terminated and the process proceeds to this process.

  At the end of preheating, a buzzer is used to notify the user.

  This preheating end control value is smaller than the control value because, in the preheating process, the heating means 12 is energized at a power rate of 100% from a state where the temperature of the heating chamber 28 is low. On the other hand, since the temperature detecting means 85 is provided at a position not directly affected by the hot air, the temperature transmission is delayed as compared with the temperature rise in the heating chamber 28 and the temperature is lower than the temperature in the heating chamber 28. This is because the detected value is input to the control means 72. In order to correct the delayed temperature rise, the detection value of the temperature detecting means 85 is made smaller than the control value of the heating temperature for the preheating end control value.

  When the preheating process is completed and the process proceeds to this process, the power supply rate of the power to the heating means 12 used in this process is kept low.

  Therefore, in this process, the temperature difference between the heating chamber 28 and the temperature detecting means 85 that has occurred since the start of the preheating process is reduced, and at the time when the power to the first heating means 12 is turned off from the start of the heating, The temperature difference between the temperature of 28 and the temperature of the temperature detecting means 85 is reduced, and overshoot is also suppressed.

  After the preheating is finished, the cook opens the door 2, places the article 51 to be heated on the square plate 50, places it on the shelf in the heating chamber, closes the door 2, inputs the start key 6c again, and starts heating.

  After restarting, the temperature is maintained at 180 ° C. in this step, and after 20 minutes, heating is turned off and cooking is completed.

  As described above, according to the present embodiment, the power used for cooking can be reduced without overshooting without increasing the preheating time of the heating chamber 28.

  Next, a second embodiment will be described with reference to FIGS.

  The heating means 12 is a heater for heating the heating chamber 28. The grill heating means 12a (power consumption 650W), the oven heating means lower 12b-1 (power consumption 680W), and the oven heating means upper 12b-2 (power consumption 680W). ).

  The oven heating means 12b (the oven heating means lower 12b-1 and the oven heating means upper 12b-2) are provided in a horizontally long shape so as to be positioned above and below the hot air fan 32 in the hot air unit 11 in this embodiment. ing.

  Then, the hot air fan 32 is rotated by driving the hot air motor 13 attached to the outside of the hot air case 11a, the air in the heating chamber 28 is sucked, the sucked air is heated by the oven heating means 12b, and then to the heating chamber 28. The heating chamber 28 is heated by repeating the air blowing.

  As in Example 1, the heater heating setting key 6b is used to set oven heating with preheating, and the setting dial 6d is turned while looking at the display unit 5, and the heating temperature (180 ° C.) and the heating time (20 minutes) are set. The input is set, and the start key 6c is input to start preheating.

  When preheating is started, in the preheating process, electric power of 100% is applied to both the lower oven heating means 12b-1 and the upper oven heating means 12b-2 used for preheating, and the hot air motor 13 is simultaneously operated to operate the hot air fan. 32 is rotated.

  The rotating hot air fan 32 causes the heat of the oven heating means 12 b to circulate through the heating chamber 28 and heat the heating chamber 28.

  The control means 72 sequentially detects the detection value input from the temperature detection means 85, monitors the rise in the temperature of the heating chamber 28, and the detection value input from the temperature detection means 85 is preheated to a heating temperature of 180 ° C. When the end control value (H) reaches “88”, the process proceeds from the preheating process to the present process.

  At the end of preheating, a buzzer or the like can be used to inform the user.

  If it transfers to this process, heating will be continued using the grill heating means 12a and the oven heating means lower 12b-1 used at this process.

  As shown in FIG. 9, the energization rate of the heating means 12 used in this step is 25% for the grill heating means 12a and 100% for the lower heating means 12b-1 at a heating temperature of 180 ° C. To do.

  In this step, the heating rate of the electric power supplied to the heating means is kept low, thereby reducing the temperature difference between the temperature rise of the heating chamber 28 and the temperature detecting means 85, and significant heating unevenness of the heated object 51 during this step. It plays a role to suppress.

  By controlling in this way, the temperature difference between the temperature of the heating chamber 28 and the temperature of the temperature detection means 85 is small at the time when the first electric power transferred from the preheating process to this process is turned off.

  After the preheating is finished, the cook opens the door 2, places the article 51 to be heated on the square plate 50, places it on the shelf in the heating chamber, closes the door 2, inputs the start key 6c again, and starts heating.

  When 20 minutes have passed after the restart, the heating is finished and the cooking is finished.

  As described above, according to the present embodiment, the power used for cooking can be reduced without overshooting without increasing the preheating time of the heating chamber.

  In the first embodiment and the second embodiment, the range heating using the magnetron 33 and the grill heating using the grill heating means 12a are the same as in the prior art, and the description thereof is omitted.

DESCRIPTION OF SYMBOLS 5 Display part 6 Operation part 12 Heating means 50 Square plate 51 To-be-heated object 72 Control means 85 Temperature detection means

Claims (1)

A heating chamber for cooking the object to be heated;
Heating means for heating the object to be heated;
Temperature detecting means for detecting the temperature of the heating chamber;
An operation unit for inputting a heating temperature and a heating time for heating the object to be heated;
In order to keep the temperature of the heating chamber at the heating temperature input from the operation unit, the input heating temperature is compared with the temperature detected by the temperature detection means, and the heating means is turned on / off. Control means for
In the high-frequency heating cooker having an oven heating function for cooking the heated object through the preheating process for preheating the heating chamber by the heating means and the present process for cooking the heated object,
In the preheating step, the control means performs an energization rate of power to the heating means at 100%, and detects the temperature detected by the temperature detecting means lower than the input heating temperature by a certain temperature. Preheating ends when a value is detected
In this step, the power supply rate to the heating unit is changed according to the heating temperature, and the temperature detected by the temperature detection unit is matched with the heating temperature input from the operation unit. A high-frequency cooking device characterized by ON / OFF control of the means.

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