JP2017069226A - Induction heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an induction heating cooker which can correctly detect input of a cooking target even when there are fluctuation elements such as difference in an oil quantity, preset temperature, and material of a cooking container to be used.SOLUTION: An induction heating cooker comprises: a top plate for placing a heating target; induction heating means; an inverter circuit; a temperature detection element for detecting temperature; temperature detection means for converting a detection signal of the temperature detection element into temperature to detect temperature of the heating target; control means for controlling power supply and stop of the inverter circuit and an output amount of the induction heating means; heating output amount measurement means for measuring a heating output amount of the induction heating means; and storage means for storing the heating output amount. The control means includes a control process of performing a fried food cooking mode composed of a keep-warm process of keeping temperature of oil at predetermined temperature and a plurality of other processes, and causing the heating output amount measurement means to measure the heating output amount of the induction heating means a plurality of times, and causing the storage means to store the measured heating output amounts, and compares the stored heating output amount with the latest heating output amount to detect input of the heating target.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an induction heating cooker having a plurality of cooking modes, and more particularly to an induction heating cooker having a fried food cooking mode.

  Conventionally, in an induction heating cooker that performs fried food cooking, when it is detected that the internal temperature of the cooking object in the pan has reached a predetermined temperature, the temperature of the oil in the pan is first set according to the load amount of the cooking object. There is known an induction heating cooker having an oil temperature increasing mode in which the heating output is automatically changed so that the second holding temperature is higher than the holding temperature (see, for example, Patent Document 1).

JP 2012-094259 A (page 3, FIG. 2)

In the conventional induction heating cooker, when the amount of oil in the heated object is small and the loaded food is light and the load is light, the oil temperature drop level is small and the increase in heating output is also small. There was a problem that it was difficult to detect that the object to be cooked was input.
In addition, if there are fluctuating factors such as differences in oil amount, differences in set temperature, and differences in the materials of the cooking container used, differences in the oil temperature drop level and the amount of increase in heating output will result in the food being cooked. There was a problem that this could not be detected accurately.

  The present invention has been made in order to solve such a problem, and compares the heating output amount stored in the storage means with the latest heating output amount, and based on the comparison result, the object to be cooked in the object to be heated. Induction heating cooking that can accurately detect the input of food to be cooked even if there are fluctuating factors such as oil amount, set temperature difference, cooking container material used, etc. The purpose is to provide a vessel.

An induction heating cooker according to the present invention that solves the problem includes a top plate on which a heated object that is a cooking container is placed, induction heating means that is provided below the top plate, and induction heats the heated object, An inverter circuit for supplying AC power to the induction heating means; a temperature detection element that is provided below the top plate and detects the temperature of the object to be heated; and a detection signal of the temperature detection element is converted into a temperature, Temperature detecting means for detecting the temperature of the object to be heated, control means for controlling the power supply and stopping of the inverter circuit, and the heating output amount of the induction heating means, respectively, and the heating output amount of the induction heating means are measured A heating output amount measuring means; and a storage means for storing the heating output amount measured by the heating output amount measuring means, wherein the control means sets the temperature of the oil put in the object to be heated to a predetermined temperature. To keep in front A temperature maintaining step for controlling the temperature converted by the temperature detection means to be the first control temperature and a fried food cooking mode configured by one or more other steps are executed, and the control means further includes The heating output amount measuring means measures the heating output amount when the induction heating means is operated at a predetermined output a plurality of times, stores the measured heating output amount in the storage means, and Calculate the ratio between the latest heating output amount of the heat retaining step and the previously measured heating output amount stored in the storage means, and measure the latest heating output amount and the previous time stored in the storage means A control step of calculating a ratio with the heating output amount, and determining that an object to be cooked is put into the object to be heated when any of these ratios is larger than a predetermined determination value, The means is the heated If it is determined that the object to be cooked is put in, the temperature is changed to a second control temperature higher than the first control temperature, and the heating output amount of the induction heating means is changed into the object to be heated. It is changed so as to become larger than the heating output amount before it is determined that is introduced.
An induction heating cooker according to the present invention includes a top plate on which an object to be heated which is a cooking container is placed, an induction heating means provided below the top plate for inductively heating the object to be heated, and the induction An inverter circuit that supplies AC power to the heating means, a temperature detection element that is provided below the top plate and detects the temperature of the object to be heated, and a detection signal of the temperature detection element is converted into temperature, and the heating target The temperature detection means for detecting the temperature of the object, the control means for controlling the power supply and stop of the inverter circuit, and the heating output amount of the induction heating means, respectively, and the induction heating means are energized in a predetermined time width. And a storage means for storing the ON time of the induction heating means timed by the time measuring means, wherein the control means is configured to control the oil contained in the object to be heated. Temperature to a given temperature As described above, a fried food cooking mode configured to include a heat retaining process for controlling the temperature converted by the temperature detecting means to be the first control temperature, and one or more other processes, and further, The control means is the time counting means for counting the ON time when the induction heating means is operated at a predetermined output a plurality of times, and storing the time measured for the ON time in the storage means, and The ratio between the latest ON time of the heat insulation process and the previously measured ON time stored in the storage means is calculated, and the latest ON time and the ON time measured before the last stored in the storage means are calculated. Calculating a ratio with time, and when any of these ratios is greater than a predetermined determination value, comprising a control step of determining that the object to be cooked has been introduced into the object to be heated; Cover the object to be heated If it is determined that a physical object has been input, the temperature is changed to a second control temperature higher than the first control temperature, and the heating output amount of the induction heating means is input into the object to be heated. It changes so that it may become larger than the heating output amount before judging that it was.
An induction heating cooker according to the present invention includes a top plate on which an object to be heated which is a cooking container is placed, an induction heating means provided below the top plate for inductively heating the object to be heated, and the induction An inverter circuit that supplies AC power to the heating means, a temperature detection element that is provided below the top plate and detects the temperature of the object to be heated, and a detection signal of the temperature detection element is converted into temperature, and the heating target The temperature detection means for detecting the temperature of the object, the control means for controlling the power supply and stop of the inverter circuit, and the heating output amount of the induction heating means, respectively, and the induction heating means are energized in a predetermined time width. And a storage means for storing the OFF time of the induction heating means timed by the time measuring means, and the control means is configured to control the oil contained in the object to be heated. Temperature In order to maintain the temperature, the fried food cooking mode configured to include a heat retaining process for controlling the temperature converted by the temperature detecting means to be the first control temperature, and one or more other processes, Further, the control means measures the OFF time when the induction heating means is operated at a predetermined output by the timing means a plurality of times, and stores the measured OFF time in the storage means, and , Calculating the ratio of the latest OFF time of the heat retaining step and the previously measured OFF time stored in the storage means, and counting the latest OFF time and the previous time stored in the storage means Calculating a ratio with the OFF time, and when any of these ratios is smaller than a predetermined determination value, a control step of determining that an object to be cooked is put into the object to be heated is provided; , When it is determined that the object to be cooked is put into the object to be heated, the temperature is changed to a second control temperature higher than the first control temperature, and the heating output amount of the induction heating means is set in the object to be heated. It changes so that it may become larger than the heating output amount before judging that the to-be-cooked object was thrown in.
An induction heating cooker according to the present invention includes a top plate on which an object to be heated which is a cooking container is placed, an induction heating unit which is provided below the top plate and induction-heats the object to be heated, and the induction heating unit. An inverter circuit for supplying AC power to the power supply, a temperature detection element that is provided below the top plate and detects the temperature of the object to be heated, and a detection signal of the temperature detection element is converted into a temperature, The temperature detection means for detecting the temperature, the control means for controlling the power supply and stop of the inverter circuit, and the heating output amount of the induction heating means, and the induction heating means are energized in a predetermined time width. A timing means for timing the ON time and an OFF time during which power is not supplied in a predetermined time width, and a storage means for storing the ON time and the OFF time of the induction heating means timed by the timing means, control The stage includes a heat retaining step for controlling the temperature converted by the temperature detecting means to be a first control temperature so that the temperature of the oil put in the heated object is maintained at a predetermined temperature, and another 1 The fried food cooking mode configured by one or a plurality of steps is executed, and the control means further calculates the ON time and the OFF time when the induction heating means is operated at a predetermined output by the time measuring means. Counting a plurality of times, storing the measured ON time and OFF time in the storage means, and storing the latest sum of the ON time and OFF time in the heat retaining step and the storage means. The ratio between the previously measured ON time and the sum of the OFF time is calculated, and the most recent sum of the ON time and the OFF time and the previously measured ON time and the previous time stored in the storage unit are calculated. A control step of calculating a ratio with the sum of the OFF times, and determining that an object to be cooked has been introduced into the object to be heated when any of these ratios is greater than a predetermined determination value; If it is determined that the object to be cooked has been put into the object to be heated, it is changed to a second control temperature higher than the first control temperature, and the heating output amount of the induction heating means is changed to the object to be heated. It changes so that it may become larger than the heating output amount before judging that the to-be-cooked object was thrown in.
An induction heating cooker according to the present invention includes a top plate on which an object to be heated which is a cooking container is placed, an induction heating means provided below the top plate for inductively heating the object to be heated, and the induction An inverter circuit that supplies AC power to the heating means, a temperature detection element that is provided below the top plate and detects the temperature of the object to be heated, and a detection signal of the temperature detection element is converted into temperature, and the heating target Temperature detecting means for detecting the temperature of the object, control means for controlling the power supply and stopping of the inverter circuit, and the heating output amount of the induction heating means, and the heating output for measuring the heating output amount of the induction heating means. Force measuring means, and storage means for storing the heating output amount measured by the heating output amount measuring means, and the control means at least raises the temperature of the oil put in the heated object to a predetermined temperature. Raise And a heat retaining step for controlling the temperature converted by the temperature detecting means to be a first control temperature so as to keep the temperature of the oil put in the object to be heated at a predetermined temperature. In addition, the control means measures the heating output amount when the induction heating means is operated at a predetermined output by the heating output quantity measuring means, and measures the heating output quantity. The storage means stores the heating output amount of the preheating step or the heat retention step or both, and stores the latest heating output amount of the heat retention step stored in the storage unit and the storage unit. The ratio of the heating output amount measured last time in the heat retaining step, the latest heating output amount of the heat retaining step stored in the storage means, and the heat retention stored in the storage means A ratio of the heating output amount measured two times in advance, the last heating output amount of the preliminary process stored in the storage means, and the latest heating of the heat retaining process stored in the storage means A control step of calculating a ratio with the output amount, and determining that an object to be cooked has been introduced into the object to be heated when any of these ratios is greater than a predetermined determination value; If it is determined that the object to be cooked is put into the object to be heated, the temperature is changed to a second control temperature higher than the first control temperature, and the heating output amount of the induction heating means is changed to the object to be heated. It changes so that it may become larger than the heating output amount before judging that the to-be-cooked object was thrown in.
An induction heating cooker according to the present invention includes a top plate on which an object to be heated which is a cooking container is placed, an induction heating means provided below the top plate for inductively heating the object to be heated, and the induction An inverter circuit that supplies AC power to the heating means, a temperature detection element that is provided below the top plate and detects the temperature of the object to be heated, and a detection signal of the temperature detection element is converted into temperature, and the heating target The temperature detection means for detecting the temperature of the object, the control means for controlling the power supply and stop of the inverter circuit, and the heating output amount of the induction heating means, respectively, and the induction heating means are energized in a predetermined time width. And a storage means for storing the ON time of the induction heating means timed by the time measuring means, and the control means comprises at least oil contained in the object to be heated. The temperature of A preheating step for raising the temperature to the temperature of the oil to be heated, and a temperature keeping controlled so that the temperature converted by the temperature detecting means becomes the first control temperature so that the temperature of the oil put in the heated object is kept at a predetermined temperature. A fried food cooking mode configured by a process, and the control means counts the ON time when the induction heating means is operated at a predetermined output by the timing means a plurality of times. The ON time of the preheating step or the heat retention step or both of them is stored in the storage means, and the latest ON time of the heat retention step stored in the storage means and stored in the storage means A ratio of the ON time previously measured in the heat retaining step, the latest ON time of the heat retaining step stored in the storage means, and the heat retention stored in the storage means. A ratio of the ON time measured in advance in the process, the last ON time of the preheating process stored in the storage means, and the latest ON time of the heat retention process stored in the storage means And a control step of determining that the object to be cooked has been introduced into the object to be heated when any of these ratios is greater than a predetermined determination value. If it is determined that the object to be cooked is put into the heated object, the temperature is changed to a second control temperature higher than the first control temperature, and the heating output amount of the induction heating means is changed into the object to be heated. It changes so that it may become larger than the heating output amount before judging that the cooking thing was thrown in.
An induction heating cooker according to the present invention includes a top plate on which an object to be heated which is a cooking container is placed, an induction heating means provided below the top plate for inductively heating the object to be heated, and the induction An inverter circuit that supplies AC power to the heating means, a temperature detection element that is provided below the top plate and detects the temperature of the object to be heated, and a detection signal of the temperature detection element is converted into temperature, and the heating target The temperature detection means for detecting the temperature of the object, the control means for controlling the power supply and stop of the inverter circuit, and the heating output amount of the induction heating means, respectively, and the induction heating means are energized in a predetermined time width. And a storage means for storing the OFF time of the induction heating means timed by the time measuring means, and the control means comprises at least oil contained in the object to be heated. Temperature A preheating step for raising the temperature to a predetermined temperature, and control so that the temperature converted by the temperature detecting means becomes the first control temperature so as to keep the temperature of the oil put in the heated object at a predetermined temperature. A fried food cooking mode comprised of a heat-retaining step, and the control means counts the OFF time when the induction heating means is operated at a predetermined output by the timing means a plurality of times, The OFF time of the preheating step and / or the heat retention step that have been timed is stored in the storage unit, and the latest OFF time of the heat retention step stored in the storage unit and stored in the storage unit The ratio of the OFF time measured last time in the heat retaining step being performed, the latest OFF time of the heat retaining step stored in the storage means, and the storage means The ratio of the OFF time measured in advance in the heat retaining process and the ratio of the last OFF time of the preheating process stored in the storage means and the latest OFF time of the heat retaining process are calculated. And when any of these ratios is smaller than a predetermined determination value, it comprises a control step of determining that the object to be cooked has been put into the object to be heated, and the control means is provided with the object to be heated in the object to be heated. When it is determined that the cooked food has been thrown in, the cooking temperature is changed to a second control temperature higher than the first control temperature, and the heating output amount of the induction heating means is put into the cooked food. It changes so that it may become larger than the heating output amount before judging that it was.
An induction heating cooker according to the present invention includes a top plate on which an object to be heated which is a cooking container is placed, an induction heating means provided below the top plate for inductively heating the object to be heated, and the induction An inverter circuit that supplies AC power to the heating means, a temperature detection element that is provided below the top plate and detects the temperature of the object to be heated, and a detection signal of the temperature detection element is converted into temperature, and the heating target The temperature detection means for detecting the temperature of the object, the control means for controlling the power supply and stop of the inverter circuit, and the heating output amount of the induction heating means, respectively, and the induction heating means are energized in a predetermined time width. And a storage means for storing the ON time and the OFF time of the induction heating means timed by the time measuring means. ,Previous The control means includes at least a preheating step for raising the temperature of the oil put in the heated object to a predetermined temperature, and the temperature detection so as to keep the temperature of the oil put in the heated object at a predetermined temperature. A fried food cooking mode configured to control so that the temperature converted by the means becomes the first control temperature, and the control means is the time measuring means, and the induction heating means has a predetermined output. The ON time and the OFF time when operated at a plurality of times, and the storage means stores the ON time and the OFF time of the preheating step or the heat retaining step or both of the time, and , The sum of the latest ON time and OFF time of the heat retaining process stored in the storage means, and the O timed last time in the heat retaining process stored in the storage means. The ratio between the time and the sum of the OFF time, the latest sum of the ON time and the OFF time of the heat retention process stored in the storage means, and the heat retention process stored in the storage means The ratio of the counted ON time and the sum of the OFF time, the last ON time and the OFF time of the preliminary process stored in the storage means, and the heat retention stored in the storage means The ratio of the latest ON time and the sum of the OFF time of the process is calculated, and when any of these ratios is larger than a predetermined determination value, the food to be cooked is put into the object to be heated. A control step for determining, and when the control means determines that the object to be cooked is put into the object to be heated, the control means changes to a second control temperature higher than the first control temperature, and the induction Heating out of heating means The power is changed so as to be larger than the heating output amount before it is determined that the food to be cooked has been put into the food to be heated.

According to the present invention, the heating output amount of the induction heating unit is measured a plurality of times, the measured heating output amount is stored in the storage unit, and the heating output amount stored in the storage unit is compared with the latest heating output amount. Therefore, even if there is a slight difference, from the comparison result, it is possible to detect the input of the cooking object into the heated object, and change the control temperature and heating output according to the input of the cooking object. It is possible to control the temperature so that it quickly returns to the original temperature when the temperature of the oil drops due to the input of the food.

It is a perspective view which shows the structure of the induction heating cooking appliance which concerns on Embodiment 1 of this invention. It is a perspective view of the state which removed the top plate which shows the structure of the induction heating cooking appliance concerning Embodiment 1 of this invention. It is a fragmentary sectional view which shows the induction heating means and temperature detection means of the induction heating cooking appliance which concerns on Embodiment 1 of this invention. It is a block diagram which shows the structure of the control system of the induction heating cooking appliance which concerns on Embodiment 1 of this invention. It is a flowchart which shows control of the induction heating cooking appliance which concerns on Embodiment 1 of this invention. It is a continuation of the flowchart of FIG. It is a graph which shows the control state of the induction heating cooking appliance which concerns on Embodiment 1 of this invention. It is a graph which shows the other control state of the induction heating cooking appliance which concerns on Embodiment 1 of this invention. It is a block diagram which shows the structure of the control system of the induction heating cooking appliance which concerns on Embodiment 2 of this invention. It is a flowchart which shows control of the induction heating cooking appliance which concerns on Embodiment 2 of this invention. It is a continuation of the flowchart of FIG. It is a flowchart which shows control of the induction heating cooking appliance which concerns on Embodiment 3 of this invention. It is a continuation of the flowchart of FIG. It is a flowchart which shows control of the induction heating cooking appliance which concerns on Embodiment 4 of this invention. It is a continuation of the flowchart of FIG. It is a flowchart which shows control of the induction heating cooking appliance which concerns on Embodiment 5 of this invention. It is a continuation of the flowchart of FIG. It is a flowchart which shows control of the induction heating cooking appliance which concerns on Embodiment 6 of this invention. It is a continuation of the flowchart of FIG. It is a flowchart which shows control of the induction heating cooking appliance which concerns on Embodiment 7 of this invention. It is a continuation of the flowchart of FIG. It is a flowchart which shows control of the induction heating cooking appliance which concerns on Embodiment 8 of this invention. It is a continuation of the flowchart of FIG.

Embodiment 1 FIG.
(Constitution)
1 is a perspective view showing a configuration of an induction heating cooker according to Embodiment 1 of the present invention, and FIG. 2 is a state in which a top plate showing a configuration of the induction heating cooker according to Embodiment 1 of the present invention is removed. FIG. 3 is a partial cross-sectional view showing an induction heating coil and temperature detection means of the induction heating cooker according to Embodiment 1 of the present invention, and FIG. 4 is an illustration of the induction heating cooker according to Embodiment 1 of the present invention. It is a block diagram which shows the structure of a control system.

Hereinafter, the structure of the induction heating cooking appliance which concerns on Embodiment 1 of this invention with reference to FIGS. 1-4 is demonstrated.
Note that in each drawing, the same reference numerals are given to the same portions or corresponding portions, and a part of the description may be omitted.

  As shown in FIG. 1, the induction heating cooker 100 according to the first embodiment of the present invention is a non-magnetic material, for example, crystallized glass, on which a cooking container 10 containing an object to be cooked can be placed on the top surface of the main body 1. A top plate 2 is provided. The top plate 2 constitutes a top plate 4 with a metal frame 3 made of, for example, stainless steel, which is fixed to the outer periphery thereof with a silicon-based adhesive (not shown) or the like.

  The top plate 4 includes an upper surface operation unit 5 for performing various operation inputs. On the front surface of the main body 1, there are provided a front operation unit 6 for performing various operation inputs and a power switch 7 for turning on / off the induction heating cooker.

  Reference numeral 8 denotes a cooking chamber in which an object to be cooked such as fish is placed inside by a radiant heating means (not shown) and grill cooking or oven cooking is performed.

  A cooking cabinet door 9 is provided at the front opening of the cooking cabinet 8 so that it can be pulled out forward. In conjunction with the drawer of the cooking cabinet door 9, a placing plate (not shown) and a grill net (not shown) on which the food to be cooked placed on the placing plate is placed are pulled out.

  With the cooking chamber door 9 pushed in the most, the front opening of the cooking cabinet 8 is closed by the cooking cabinet door 9 so that cooking can be performed. An operation input for cooking in the cooking chamber 8 is performed from the upper surface operation unit 5 or the front operation unit 6.

  As shown in FIG. 2, a plurality of induction heating means are disposed below the top plate 2. Reference numeral 11 denotes a left induction heating means including an induction heating coil, which is composed of a plurality of outer peripheral coils near the outside of the induction heating means and inner peripheral coils near the inner center. 12 is a right induction heating means, and 13 is a central induction heating means. Thus, what provided three heating means is called a 3 neck type induction heating cooking appliance.

  Here, the induction heating means means a heating means using the principle of electromagnetic induction. When a high-frequency alternating current is applied to the induction heating coil, a rotating magnetic field line is generated, and a uniform magnetic field is generated inside the induction heating coil. Occur.

  When the magnetic field penetrates the induction heating coil, a magnetic field that disturbs the magnetic flux change is generated inside the induction heating coil, and an eddy current flows through the object to be heated and continues to flow by applying a high-frequency AC current, for example, an AC current of 20 to 90 kHz. Therefore, it is a heating method in which the heated object generates heat by generating Joule heat due to the electric resistance and eddy current of the heated object.

  In this embodiment, three induction heating means are provided. However, in an induction heating cooker provided with three heating means, one of the central induction heating means is an induction heating means. There may be a non-heating means, for example, a radiant heating means comprising a heating wire such as a radiant heater, which can be appropriately selected.

  As shown in FIG. 2, temperature detecting elements 14 a and 14 b are disposed between the outer peripheral coil 11 b and the inner peripheral coil 11 a of the left induction heating unit 11. The temperature detection elements 14a and 14b are contact-type temperature sensors such as a thermistor that detect heat transfer by contacting a temperature measurement target.

As shown in FIG. 3, the temperature detection means 14 a and 14 b are biased so as to contact the lower surface of the top plate 2, and detect the heat of the cooking container 10 transmitted to the top plate 2.

  Similarly, as shown in FIG. 2, a temperature detection element 15 is disposed between the outer peripheral coil 11 b and the inner peripheral coil 11 a of the left induction heating unit 11. The temperature detection element 15 is a non-contact sensor such as an infrared sensor.

  As shown in FIG. 3, the temperature detecting means 15 is provided with a lower surface of the top plate 2 and a predetermined space. Infrared energy transmitted through the top plate 2 and radiated from the cooking container 10 is detected in a non-contact manner, converted into a temperature, and the temperature of the cooking container 10 is detected.

  The temperature detecting element 15 aggregates infrared rays radiated from the object 10 to be heated and can receive and detect the infrared energy in real time (with almost no time difference). The temperature sensing elements 14a and 14b are superior.

  The temperature detection elements 14a and 14b of the contact-type temperature sensor are inferior in capturing a rapid temperature change in real time as compared with the non-contact-type temperature detection element 15. However, the radiant heat from the top plate 2 and the object to be heated 10 is inferior. Therefore, the temperature detection element 15 is superior to the temperature detection element 15 in that the temperature of the bottom of the object to be heated 10 and the temperature of the top plate 2 immediately below the object 10 can be reliably detected. Moreover, since heat transfer is detected, it is possible to detect the heat remaining in the top plate 2 even when the article to be heated 10 is moved.

  As described above, the temperature detection elements 14a and 14b made of contact type temperature sensors and the non-contact type temperature detection element 15 such as an infrared sensor have excellent points, respectively. Detection accuracy can be improved.

  In the first embodiment of the present invention, the temperature sensing elements are two in total, that is, two contact type temperature sensors and one non-contact type sensor such as an infrared sensor. However, the present invention is not limited to this and is appropriately selected. Can be arranged.

  Below the right induction heating means 12, a control means 18 comprising a printed wiring board (not shown) and electronic components, and an inverter circuit 16 comprising a semiconductor switching element, a rectifier circuit and other electronic components on a printed wiring board (not shown). Is arranged. Although not shown, a cooling fan for cooling the printed wiring board, the left induction heating means 11, the right induction heating means 12, the central induction heating means 13 and the like is also provided.

  As shown in FIG. 4, the storage means 20 and the comparison means 21 are included in the control means 18, and the storage means 20 stores the left induction heating means 11 in the heat retaining step described later, which is measured by the heating output amount measuring means 19. The amount of heating output when outputting at a predetermined output, for example, 1000 W, is stored.

The heating output amount stored in the storage means is compared with the latest heating output amount by the comparison means 21, and the cooked object 30 is input when the latest heating output amount becomes larger than the stored heating output amount. The control means determines. The operation will be described in detail later.

(Operation)
5 is a flowchart showing the control of the induction heating cooker according to Embodiment 1 of the present invention, FIG. 6 is a continuation of the flowchart of FIG. 5, and FIG. 7 is the control of the induction heating cooker according to Embodiment 1 of the present invention. The graph which shows a state, FIG. 8 is a graph which shows the other control state of the induction heating cooking appliance which concerns on Embodiment 1 of this invention. The operation will be described with reference to the above-described configuration and FIGS.

  When the user turns on the power switch 7, the control means 18 is activated. First, after initial processing such as clearing of a built-in counter (not shown) and initial value setting required for starting operation, the top surface is performed. An input from the operation unit 5 or the front operation unit 6 is possible.

  Next, when the user inputs from the top surface operation unit 5 or the front surface operation unit 6, the control means 18 checks whether or not the input information is a cooking start command. If not, the cooking start command is input. Wait until

  For example, when fried food cooking is performed by the left induction heating means 11 from an input waiting state, after pressing an input key (not shown) of the fried food cooking mode, cooking information such as oil temperature and heating power is set and input, and cooking is started. When a switch (not shown) is pressed, an output control signal based on the heating power set by the cooking start command is sent to the inverter circuit 16, and the inverter circuit 16 starts supplying high-frequency power to the left induction heating means 11.

  When deep-fried food cooking is started by the left induction heating means 11, a deep-fried food preheating step for raising the temperature to a predetermined temperature at which oil can be cooked is started (S1). For example, the preheating is performed with an output of 1000 W (S2). Although not described in the flowchart, the amount of warpage of the bottom surface of the article to be heated 10 and the amount of oil are also determined.

  The control means 18 determines a control temperature A ° C. for controlling the set predetermined temperature. For example, if the predetermined temperature set is 180 ° C., A ° C. = 180 ° C. Next, the determined control temperature A ° C. is compared with the detected temperature detected by the temperature detecting element and detected by the temperature detecting means (S3).

  When the detected temperature becomes A ° C. or higher in S3, the heating is turned off, and the heating output amount measured by the heating output amount measuring means 19 is stored in the storage means 20 (S4). The amount of heating output is calculated from the time of energization (heating time) at an output of 1000 W. From the start of the deep-fried food preheating process until the predetermined temperature is reached, the heating of the left induction heating means 11, in other words, energization is repeatedly turned on and off.

  The heating is repeatedly turned on and off, and it is determined how many times the heating is turned off (S5). When the number of times of heating OFF has not reached the third time in S5, if the detected temperature is lower than A ° C., the heating is continued (S6).

  When the number of times of heating OFF has reached the third time in S5, the deep-fried food preheating process is terminated and the deep-fried food warming process is started (S7). The fried food preheating process was completed when the number of heating OFF times was the third time, and the number of times until the oil temperature stabilized after repeating ON and OFF of heating from the test results was, for example, three times. It is not limited to three times.

  In the deep-fried food insulation process, the oil temperature is controlled to be kept constant. A control temperature A ° C. is set so as to maintain a predetermined temperature (S8). It is determined whether the detected temperature is lower than the control temperature with respect to the set control temperature A ° C. (S9).

  It is heated at 1000 W, and it is determined whether the detected temperature is equal to or higher than the control temperature (S11). When the detected temperature is equal to or higher than the control temperature in S11, the heating is turned off, and the heating output amount measured by the heating output amount measuring means 19 is stored in the storage means 20 (S13). Thereafter, the temporary heating is turned off (S14), and the deep-fried food insulation process is continued.

  When the detected temperature is not equal to or higher than the control temperature in S11, AA that is the ratio of the previous heating output amount to the current heating output amount, and BB that is the ratio of the previous heating output amount to the current heating output amount are calculated ( S12).

  The previous heating output amount is the heating output amount when energized at T5 in FIG. 7, and the current heating output amount is the heating output amount when energized at T7. Moreover, the heating output amount of the last time is the heating output amount when energized at T3.

  Similarly, in FIG. 8, the heating output amount when energized at T7, and the current heating output amount is the heating output amount when energized at T9. Moreover, the heating output amount of the last time is the heating output amount when energized at T5.

  Here, T0 to T9 shown in FIGS. 7 and 8 will be described. T1, T3, T5, T7, and T9 are periods during which the induction heating means is energized with a predetermined time width, and have the same meaning as the heating ON time described later.

  When the induction heating means is operated at a predetermined heating output, it is not always energized, and the energized time and the non-energized time are alternately repeated. T0, T2, T4, T6, and T8 are periods in which current is not supplied with a predetermined time width, and have the same meaning as a heating OFF time described later.

  The calculated AA and BB are respectively compared with a predetermined determination value X by the comparison means 21 (S15). The ratio of the heating output amount that is stable in a state where the cooking object 30 is not charged is 1. The determination value X is set as a numerical value larger than 1 and X> 1.

  When one of the values AA and BB is larger than the determination value X, it is determined that the object to be cooked 30 has been added. When the object to be cooked 30 is put in, the temperature of the oil is lowered, so that the heating time is increased and the heating output amount is increased in order to increase the temperature to the control temperature A ° C. Therefore, the value of either AA or BB is increased, and it is possible to determine whether to-be-cooked object 30 is input.

  Here, as a judgment, either AA, which is the ratio of the previous heating output amount to the current heating output amount, or BB, which is the ratio of the previous heating output amount to the current heating output amount, is used. In the example shown in the graph of FIG. 7, T7 is obviously long, so that it can be determined. In the example of the graph shown in FIG. 8, T7, which is the period for calculating the previous heating output amount, is the current time. This is a response in consideration of a case where it cannot be said that it is clearly longer than T9 which is a period for calculating the heating output amount.

  The example shown in the graph of FIG. 8 is different from the amount of oil, the set temperature, the type of pot used, and the difference in the amount of cooking load. Although it is an example which does not change, even in such a case, T9 of the period for calculating the heating output amount this time is obviously longer than T5 of the period for calculating the heating output amount of the previous time, so that it can be determined. .

  When it is determined in S15 that the food item 30 has been added, the heating output is changed to 1500 W (S16), and the control temperature is changed to C ° C higher than A ° C (S17). After heating to a control temperature C ° C. or higher at a heating output of 1500 W (S17), the heating is temporarily turned off (S18).

Thereafter, heating is turned ON / OFF only once at a control temperature B ° C. higher than A ° C. and lower than C ° C. (S19), and the process returns to the heating ON / OFF control at the control temperature A ° C.

  As described above, according to the induction heating cooker of the first embodiment of the present invention, the stored previous or previous heating output amount is compared with the current heating output amount, in other words, the latest heating output amount. Since it did in this way, it can judge reliably that the to-be-cooked material was thrown in, and can perform control corresponding to the temperature fall of the oil by the to-be-cooked food quickly.

Embodiment 2. FIG.
(Constitution)
The configuration of the induction heating cooker according to the second embodiment of the present invention is only partially different from the induction heating cooker according to the first embodiment of the present invention, and different points will be described. Since it is the same as the induction heating cooker of Embodiment 1, it abbreviate | omits here.

  FIG. 9 is a block diagram showing the configuration of the control system of the induction heating cooker according to Embodiment 2 of the present invention. Instead of the heating output amount measuring means 19 of the induction heating cooker according to the first embodiment of the present invention, a time measuring means 23 is provided. The time measuring means 23 measures the heating ON time or OFF time described later.

(Operation)
FIG. 10 is a flowchart showing the control of the induction heating cooker according to the second embodiment of the present invention, and FIG. 11 is a continuation of the flowchart of FIG. The operation of the induction heating cooker according to the second embodiment of the present invention will be described with reference to FIGS. 10 and 11 and FIGS. 7 and 8 used in the first embodiment of the present invention.

  Similar to the induction heating cooker according to the first embodiment of the present invention, when the user turns on the power switch 7, the control means 18 is activated. First, the built-in counter (not shown) is cleared and the operation is started. After initial processing such as necessary initial value setting, input from the top operation unit 5 or the front operation unit 6 is possible.

  Next, when the user inputs from the top surface operation unit 5 or the front surface operation unit 6, the control means 18 checks whether or not the input information is a cooking start command. If not, the cooking start command is input. Wait until

  For example, when fried food cooking is performed by the left induction heating means 11 from an input waiting state, after pressing an input key (not shown) of the fried food cooking mode, cooking information such as oil temperature and heating power is set and input, and cooking is started. When a switch (not shown) is pressed, an output control signal based on the heating power set by the cooking start command is sent to the inverter circuit 16, and the inverter circuit 16 starts supplying high-frequency power to the left induction heating means 11.

  When fried food cooking is started by the left induction heating means 11, a fried food preheating process for raising the temperature to a predetermined temperature at which oil can be cooked is started (S21). For example, the preheating is performed with an output of 1000 W (S22). Although not described in the flowchart, the amount of warpage of the bottom surface of the article to be heated 10 and the amount of oil are also determined.

  The control means 18 determines a control temperature A ° C. for controlling the set predetermined temperature. For example, if the predetermined temperature set is 180 ° C., A ° C. = 180 ° C. Next, the determined control temperature A ° C. is compared with the detected temperature detected by the temperature detecting element and detected by the temperature detecting means (S23).

  When the detected temperature becomes A ° C. or higher in S23, the heating is turned off, and the heating ON time measured by the time measuring means 23 is stored in the storage means 20 (S24). The heating of the left induction heating means 11 is repeatedly turned on and off until the predetermined temperature is reached after the fried food preheating process is started.

  The heating is repeatedly turned on and off, and it is determined how many times the heating is turned off (S25). When the number of times of heating OFF has not reached the third time in S25, if the detected temperature is lower than A ° C., the heating is continued (S26).

  When the number of times of heating OFF reaches the third time in S25, the deep-fried food preheating process is terminated and the deep-fried food warming process is started (S27). The number of times of heating OFF is, for example, 3 times as in the first embodiment of the present invention, and is not limited to 3 times.

  In the deep-fried food insulation process, the oil temperature is controlled to be kept constant. The control temperature A ° C. is set so as to maintain a predetermined temperature (S28). It is determined whether the detected temperature is lower than the control temperature with respect to the set control temperature A ° C. (S29).

  It is heated at 1000 W and it is determined whether the detected temperature is equal to or higher than the control temperature (S31). When the detected temperature is equal to or higher than the control temperature in S31, the heating is turned off, and the heating ON time measured by the time measuring means 23 is stored in the storage means 20 (S33). Thereafter, temporary heating is turned off (S34), and the deep-fried food insulation process is continued.

  When the detected temperature is not equal to or higher than the control temperature in S31, CC, which is the ratio of the previous heating ON time to the current heating ON time, and DD, which is the ratio of the previous heating ON time to the current heating ON time, are calculated ( S32).

  The previous heating ON time is T5 in FIG. 7, and the current heating ON time is T7. The previous heating ON time is T3. Similarly, it is T7 in FIG. 8, and this heating ON time is T9. Moreover, the heating ON time of the last time is T5.

  The calculated CC and DD are respectively compared with a predetermined determination value TX by the comparison means 21 (S35). The ratio of the heating ON time that is stable in a state where the cooking object 30 is not charged is 1. The determination value TX is set as a numerical value greater than 1, TX> 1.

  When one of the values of CC and DD is larger than the determination value TX, it is determined that the to-be-cooked object 30 has been added. When the object to be cooked 30 is put in, the temperature of the oil is lowered, so that the heating ON time becomes longer to control the temperature to be raised to the control temperature A ° C. Therefore, the value of either CC or DD is increased, and it is possible to determine whether the cooking object 30 has been input.

  Here, as a judgment, either CC, which is the ratio of the previous heating ON time to the current heating ON time, or DD, which is the ratio of the previous heating ON time to the current heating ON time, is used. In the example as shown in the graph of FIG. 7, T7 can be judged because it is clearly longer. In the example as shown in the graph of FIG. 8, the previous heating ON time T7 is the current heating ON time. This is a response considering the case where it cannot be said that it is clearly longer than a certain T9.

  The example shown in the graph of FIG. 8 is different from the amount of oil, the set temperature, the type of pot used, and the difference in the amount of cooking load. In this case, even in such a case, it can be determined that T9 of the current heating ON time is clearly longer than T5 of the previous heating ON time.

  When it is determined in S35 that the food item 30 has been added, the heating output is changed to 1500 W (S36), and the control temperature is changed to C ° C higher than A ° C (S37). After heating to a control temperature C ° C. or higher at a heating output of 1500 W (S37), the heating is temporarily turned off (S38).

  Thereafter, heating is turned ON / OFF only once at a control temperature B ° C. higher than A ° C. and lower than C ° C. (S39), and the process returns to the heating ON / OFF control at the control temperature A ° C.

  As described above, according to the induction heating cooker of the second embodiment of the present invention, the stored previous heating time or the previous heating ON time is compared with the current heating ON time, in other words, the latest heating ON time. As described above, as in the first embodiment of the present invention, it is possible to reliably determine that the object to be cooked has been put in, and perform control corresponding to the oil temperature drop due to the input of the object to be cooked quickly. be able to.

Embodiment 3 FIG.
(Constitution)
Since the configuration of the induction heating cooker according to the third embodiment of the present invention is the same as that of the induction heating cooker according to the second embodiment of the present invention, the description thereof is omitted here.

(Operation)
FIG. 12 is a flowchart showing the control of the induction heating cooker according to the third embodiment of the present invention, and FIG. 13 is a continuation of the flowchart of FIG. The operation will be described with reference to FIGS. 12 and 13 and FIGS. 7 and 8 used in the first and second embodiments of the present invention.

  As with the induction heating cookers according to the first and second embodiments of the present invention, when the user turns on the power switch 7, the control means 18 is activated. First, the built-in counter (not shown) is cleared and operated. After initial processing such as initial value setting necessary for starting is performed, input from the top operation unit 5 or the front operation unit 6 is enabled.

  Next, when the user inputs from the top surface operation unit 5 or the front surface operation unit 6, the control means 18 checks whether or not the input information is a cooking start command. If not, the cooking start command is input. Wait until

  For example, when fried food cooking is performed by the left induction heating means 11 from an input waiting state, after pressing an input key (not shown) of the fried food cooking mode, cooking information such as oil temperature and heating power is set and input, and cooking is started. When a switch (not shown) is pressed, an output control signal based on the heating power set by the cooking start command is sent to the inverter circuit 16, and the inverter circuit 16 starts supplying high-frequency power to the left induction heating means 11.

  When fried food cooking is started by the left induction heating means 11, a fried food preheating step for raising the temperature to a predetermined temperature at which oil can be cooked is started (S41). For example, the preheating is performed with an output of 1000 W (S42). Although not described in the flowchart, the amount of warpage of the bottom surface of the article to be heated 10 and the amount of oil are also determined.

  The control means 18 determines a control temperature A ° C. for controlling the set predetermined temperature. For example, if the predetermined temperature set is 180 ° C., A ° C. = 180 ° C. Next, the determined control temperature A ° C. is compared with the detected temperature detected by the temperature detecting element and detected by the temperature detecting means (S43).

  When the detected temperature reaches A ° C. or higher in S43, the heating is turned off, and the heating OFF time counted by the time measuring means 23 is stored in the storage means 20 (S44). The heating of the left induction heating means 11 is repeatedly turned on and off until the predetermined temperature is reached after the fried food preheating process is started.

  The heating is repeatedly turned on and off, and it is determined how many times the heating is turned off (S45). When the number of times of heating OFF has not reached the third time in S45, if the detected temperature is lower than A ° C., the heating is continued (S46).

When the number of heating-off times reaches the third time in S45, the deep-fried food preheating process is terminated and the deep-fried food heat retaining process is started (S47). The number of times of heating OFF is, for example, three times as in the first and second embodiments of the present invention, and is not limited to three times.

  In the deep-fried food insulation process, the oil temperature is controlled to be kept constant. The control temperature A ° C. is set so as to maintain a predetermined temperature (S48). It is determined whether the detected temperature is lower than the control temperature with respect to the set control temperature A ° C. (S49).

  It is heated at 1000 W, and it is determined whether the detected temperature is equal to or higher than the control temperature (S51). When the detected temperature is equal to or higher than the control temperature in S51, the heating is turned off, and the heating OFF time measured by the time measuring means 23 is stored in the storage means 20 (S53). Thereafter, the temporary heating is turned off (S54), and the deep-fried food insulation process is continued.

  If the detected temperature is not equal to or higher than the control temperature in S51, EE, which is the ratio of the previous heating OFF time to the current heating OFF time, and FF, which is the ratio of the previous heating OFF time to the current heating OFF time, are calculated ( S52).

  The previous heating OFF time is T4 in FIG. 7, and the current heating OFF time is T6. The last heating OFF time is T2. Similarly, in FIG. 8, it is T6, and the current heating OFF time is T8. Also, the last heating OFF time is T4.

  The calculated EE and FF are respectively compared with a predetermined determination value TY by the comparison means 21 (S55). The ratio of the heating OFF time that is stable in a state in which the cooking object 30 is not charged is 1. The determination value TY is set as a numerical value smaller than 1 and TY <1.

  When any value of EE and FF is smaller than the determination value TY, it is determined that the cooking object 30 has been added. When the object to be cooked 30 is put in, the temperature of the oil decreases, so that the heating ON time becomes longer and the heating OFF time becomes shorter in order to increase the temperature to the control temperature A ° C. Therefore, the value of either EE or FF becomes small, and it is possible to determine whether the cooking object 30 has been input.

  Here, as a judgment, either EE, which is the ratio of the previous heating OFF time to the current heating OFF time, or FF, which is the ratio of the previous heating OFF time to the current heating OFF time, is used. In the example as shown in the graph of FIG. 8, the case is considered in which the difference between the previous heating OFF time T6 and the current heating ON time T8 is small.

  The example shown in the graph of FIG. 8 is different in the amount of oil, the set temperature, the type of pan used, and the difference in the amount of cooking load. Although it is an example that does not change, it is possible to make a judgment by using a plurality of comparison targets.

  If it is determined in S55 that the food item 30 has been added, the heating output is changed to 1500 W (S56), and the control temperature is changed to C ° C higher than A ° C (S57). After heating to a control temperature C ° C. or higher at a heating output of 1500 W (S57), the heating is temporarily turned off (S58).

Thereafter, heating is turned ON / OFF only once at a control temperature B ° C. higher than A ° C. and lower than C ° C. (S59), and the process returns to the heating ON / OFF control at the control temperature A ° C.

  As described above, according to the induction heating cooker of Embodiment 3 of the present invention, the stored previous or previous heating OFF time is compared with the current heating OFF time, in other words, the latest heating OFF time. As described above, as in the first and second embodiments of the present invention, it is possible to reliably determine that the object to be cooked has been added, and to quickly respond to the temperature drop of the oil due to the input of the object to be cooked. It can be performed.

Embodiment 4 FIG.
(Constitution)
Since the configuration of the induction heating cooker according to the fourth embodiment of the present invention is the same as that of the induction heating cooker according to the second and third embodiments of the present invention, the description thereof is omitted here.

(Operation)
FIG. 14 is a flowchart showing the control of the induction heating cooker according to Embodiment 4 of the present invention, and FIG. 15 is a continuation of the flowchart of FIG. The operation will be described with reference to FIGS. 14 and 15 and FIGS. 7 and 8 used in the first to third embodiments of the present invention.

  As with the induction heating cookers according to the first to third embodiments of the present invention, when the user turns on the power switch 7, the control means 18 is activated. First, the built-in counter (not shown) is cleared and operated. After initial processing such as initial value setting necessary for starting is performed, input from the top operation unit 5 or the front operation unit 6 is enabled.

  Next, when the user inputs from the top surface operation unit 5 or the front surface operation unit 6, the control means 18 checks whether or not the input information is a cooking start command. If not, the cooking start command is input. Wait until

  For example, when fried food cooking is performed by the left induction heating means 11 from an input waiting state, after pressing an input key (not shown) of the fried food cooking mode, cooking information such as oil temperature and heating power is set and input, and cooking is started. When a switch (not shown) is pressed, an output control signal based on the heating power set by the cooking start command is sent to the inverter circuit 16, and the inverter circuit 16 starts supplying high-frequency power to the left induction heating means 11.

  When fried food cooking is started by the left induction heating means 11, a fried food preheating step for raising the temperature to a predetermined temperature at which oil can be cooked is started (S61). For example, the preheating is performed with an output of 1000 W (S62). Although not described in the flowchart, the amount of warpage of the bottom surface of the article to be heated 10 and the amount of oil are also determined.

  The control means 18 determines a control temperature A ° C. for controlling the set predetermined temperature. For example, if the predetermined temperature set is 180 ° C., A ° C. = 180 ° C. Next, the determined control temperature A ° C. is compared with the detected temperature detected by the temperature detecting element and detected by the temperature detecting means (S63).

  When the detected temperature becomes A ° C. or higher in S63, the heating is turned off, and the heating ON time and the heating OFF time measured by the time measuring means 23 are stored in the storage means 20 (S64). The heating of the left induction heating means 11 is repeatedly turned on and off until the predetermined temperature is reached after the fried food preheating process is started.

  The heating ON and OFF are repeated, and it is determined how many times the heating is turned off (S65). When the number of times of heating OFF has not reached the third time in S65, heating is continued if the detected temperature is lower than A ° C. (S66).

  When the number of times of heating OFF has reached the third time in S65, the deep-fried food preheating process is terminated and the deep-fried food warming process is started (S67). The number of times of heating OFF is, for example, three times as in the first to third embodiments of the present invention, and is not limited to three times.

  In the deep-fried food insulation process, the oil temperature is controlled to be kept constant. The control temperature A ° C. is set so as to maintain a predetermined temperature (S68). It is determined whether the detected temperature is lower than the control temperature with respect to the set control temperature A ° C (S69), and if it is lower, heating is performed at 1000 W (S70).

  It is heated at 1000 W and it is determined whether the detected temperature is equal to or higher than the control temperature (S71). When the detected temperature is equal to or higher than the control temperature in S71, the heating is turned off, and the heating ON time and the heating OFF time timed by the time measuring means 23 are stored in the storage means 20 (S73). Thereafter, the temporary heating is turned off (S74), and the deep-fried food insulation process is continued.

If the detected temperature is not equal to or higher than the control temperature in S71, GG, which is the ratio of the previous heating ON time + heating OFF time to the current heating ON time + heating OFF time, the previous heating ON time + heating OFF time, and the current heating time HH, which is a ratio of heating ON time + heating OFF time, is calculated (S72).

  The previous heating ON time + heating OFF time is T5 + T4 in FIG. 7, and the current heating ON time + heating OFF time is T7 + T6. Further, the heating ON time + heating OFF time of the last time is T3 + T2.

  Similarly, in FIG. 8, it is T7 + T6, and this heating ON time + heating OFF time is T9 + T8. Moreover, the heating ON time + heating OFF time of the last time is T5 + T4.

  The calculated GG and HH are respectively compared with a predetermined determination value TW by the comparison means 21 (S75). The ratio of the heating ON time + heating OFF time, which is stable in a state where the cooking object 30 is not charged, is 1. The determination value TW is set as a numerical value larger than 1 and TW> 1.

  When one of the values GG and HH is larger than the determination value TW, it is determined that the item to be cooked 30 has been added. When the object to be cooked 30 is introduced, the temperature of the oil is lowered, so that the heating ON time becomes longer to control the temperature to be raised to the control temperature A ° C., so that the heating ON time + heating OFF time also becomes longer. Therefore, the value of either GG or HH is increased, and it is possible to determine whether to-be-cooked object 30 is input.

  Here, as a judgment, GG, which is the ratio of the previous heating ON time + heating OFF time to the current heating ON time + heating OFF time, or the previous heating ON time + heating OFF time and current heating ON time + heating OFF time. The use of any one of the ratios HH can be determined because T7 + T6 is clearly longer in the example as in the graph of FIG. 7, whereas in the example as in the graph of FIG. This is a response considering the case where it cannot be said that the previous heating ON time + heating OFF time T7 + T6 is clearly longer than the current heating ON time + heating OFF time T9 + T8.

  The example shown in the graph of FIG. 8 is different from the amount of oil, the set temperature, the type of pot used, and the difference in the amount of cooking load. This is an example in which the time does not change significantly, but even in such a case, the current heating ON time + heating OFF time T9 + T8 is clearly longer than the previous heating ON time + heating OFF time T5 + T4. become able to.

  If it is determined in S75 that the food item 30 has been added, the heating output is changed to 1500 W (S76), and the control temperature is changed to C ° C higher than A ° C (S77). After heating to a control temperature C ° C. or higher at a heating output of 1500 W (S77), the heating is temporarily turned off (S78).

  Thereafter, heating is turned ON / OFF only once at a control temperature B ° C. higher than A ° C. and lower than C ° C. (S79), and the process returns to the heating ON / OFF control at the control temperature A ° C.

  As described above, according to the induction heating cooker of the fourth embodiment of the present invention, the stored previous heating time or the previous heating ON time + heating OFF time and the current heating ON time + heating OFF time, in other words, the latest Since the heating ON time + heating OFF time is compared, as in the first to third embodiments of the present invention, it is possible to reliably determine that the object to be cooked has been added. It is possible to perform control that quickly responds to a drop in oil temperature due to charging.

Embodiment 5. FIG.
(Constitution)
Since the configuration of the induction heating cooker according to the fifth embodiment of the present invention is the same as that of the induction heating cooker according to the first embodiment of the present invention, the description thereof is omitted here.

(Operation)
FIG. 16 is a flowchart showing the control of the induction heating cooker according to the fifth embodiment of the present invention, and FIG. 17 is a continuation of the flowchart of FIG. The operation will be described with reference to FIGS. 16 and 17 and FIGS. 7 and 8 used in the first to fourth embodiments of the present invention.

  As with the induction heating cookers according to the first to fourth embodiments of the present invention, when the user turns on the power switch 7, the control means 18 is activated. First, the built-in counter (not shown) is cleared and operated. After initial processing such as initial value setting necessary for starting is performed, input from the top operation unit 5 or the front operation unit 6 is enabled.

  Next, when the user inputs from the top surface operation unit 5 or the front surface operation unit 6, the control means 18 checks whether or not the input information is a cooking start command. If not, the cooking start command is input. Wait until

  For example, when fried food cooking is performed by the left induction heating means 11 from an input waiting state, after pressing an input key (not shown) of the fried food cooking mode, cooking information such as oil temperature and heating power is set and input, and cooking is started. When a switch (not shown) is pressed, an output control signal based on the heating power set by the cooking start command is sent to the inverter circuit 16, and the inverter circuit 16 starts supplying high-frequency power to the left induction heating means 11.

  When fried food cooking is started by the left induction heating means 11, a fried food preheating step for heating the oil to a predetermined temperature at which the oil can be cooked is started (S81). For example, the preheating is performed with an output of 1000 W (S82). Although not described in the flowchart, the amount of warpage of the bottom surface of the article to be heated 10 and the amount of oil are also determined.

  The control means 18 determines a control temperature A ° C. for controlling the set predetermined temperature. For example, if the predetermined temperature set is 180 ° C., A ° C. = 180 ° C. Next, the determined control temperature A ° C. is compared with the detected temperature detected by the temperature detecting element and detected by the temperature detecting means (S83).

  When the detected temperature becomes A ° C. or higher in S83, the heating is turned off, and the heating output amount measured by the heating output amount measuring means 19 is stored in the storage means 20 (S84). The amount of heating output is calculated from the time of energization (heating time) at an output of 1000 W. The heating of the left induction heating means 11 is repeatedly turned on and off until the predetermined temperature is reached after the fried food preheating process is started.

  The heating is repeatedly turned on and off, and it is determined how many times the heating is turned off (S85). If the number of times of heating OFF has not reached the third time in S5, heating is continued if the detected temperature is lower than A ° C. (S86).

  When the number of times of heating OFF has reached the third time in S5, the latest heating output amount in the deep-fried food preheating step stored in the storage means 20, in other words, the final heating output amount in the deep-fried food preheating step is set as Z (S87). Then, the deep-fried food preheating process is terminated, and the deep-fried food warming process is started (S88).

  The number of times of heating OFF is, for example, three times as in the first to fourth embodiments of the present invention, and is not limited to three times.

  In the deep-fried food insulation process, the oil temperature is controlled to be kept constant. A control temperature A ° C. is set so as to maintain a predetermined temperature (S89). It is determined whether or not the detected temperature is lower than the control temperature with respect to the set control temperature A ° C (S90), and if it is lower, it is heated at 1000 W (S91).

  It is heated at 1000 W and it is determined whether the detected temperature is equal to or higher than the control temperature (S92). When the detected temperature is equal to or higher than the control temperature in S92, heating is turned off and the heating output amount measured by the heating output amount measuring means 19 is stored in the storage means 20 (S94). Thereafter, the temporary heating is turned off (S95), and the deep-fried food insulation process is continued.

  If the detected temperature is not higher than the control temperature in S92, set as II, which is the ratio of the previous heating output amount to the current heating output amount, and JJ, Z, which is the ratio of the previous heating output amount to the current heating output amount. KK, which is the ratio of the final heating output amount of the deep-fried food preheating step and the current heating output amount of the deep-fried food keeping step, is calculated (S93).

  The previous heating output amount is the heating output amount at T5 in FIG. 7, and the current heating output amount is the heating output amount at T7 in FIG. Moreover, the heating output amount of the last time is the heating output amount at T3.

  Similarly, in FIG. 8, it is the heating output amount at T7, and the current heating output amount is the heating output amount at T9. Moreover, the heating output amount of the last time is the heating output amount at T5. Then, the final heating output amount in the fried food preheating step is the heating output amount at T1 in both FIGS.

  The calculated II, JJ, and KK are respectively compared with the preset determination value X by the comparison means 21 (S96). The ratio of the heating output amount that is stable in a state where the cooking object 30 is not charged is 1. The determination value X is set as a numerical value larger than 1 and X> 1.

  When any of the values II, JJ, and KK is larger than the determination value X, it is determined that the item to be cooked 30 has been added. When the object to be cooked 30 is put in, the temperature of the oil is lowered, so that the heating time is increased and the heating output amount is increased in order to increase the temperature to the control temperature A ° C. Therefore, the value of any of II, JJ, and KK also increases, and it can be determined whether the cooking object 30 has been input.

  Here, as a judgment, the last heating output amount set as II, which is the ratio between the previous heating output amount and the current heating output amount, or JJ, Z which is the ratio between the previous heating output amount and the current heating output amount. The use of either KK, which is the ratio of the heating output amount and the current heating output amount of the deep-fried food insulation process, can be determined because T7 is clearly longer in the example as shown in the graph of FIG. On the other hand, in the example as shown in the graph of FIG. 8, it can be said that T7 which is the period for calculating the previous heating output amount is clearly longer than T9 which is the period for calculating the current heating output amount. It is a response considering the case of no.

  The example shown in the graph of FIG. 8 is different from the amount of oil, the set temperature, the type of pot used, and the difference in the amount of cooking load. Although it is an example which does not change, even in such a case, T9 of the period for calculating the heating output amount this time is obviously longer than T5 of the period for calculating the heating output amount of the previous time, so that it can be determined. .

  In addition, the last heating output amount in the deep-fried food preheating process is set as Z, and KK which is the ratio of the final heating output amount in the deep-fried food preheating process set as Z and the current heating output amount in the deep-fried food warming process is calculated. The reason for this is to prevent the judgment from being lost when there is no stored data of the previous heating output amount of the deep-fried food warming process if the cooked food 30 is put in immediately after switching from the deep-fried food preheating process to the deep-fried food warming process. It is.

  If it is determined in S96 that the food item 30 has been added, the heating output is changed to 1500 W (S97), and the control temperature is changed to C ° C higher than A ° C (S98). After heating to a control temperature C ° C. or higher at a heating output of 1500 W (S98), the heating is temporarily turned off (S99).

  Thereafter, heating is turned ON / OFF only once at a control temperature B ° C. higher than A ° C. and lower than C ° C. (S100), and the process returns to the heating ON / OFF control at the control temperature A ° C.

  As described above, according to the induction heating cooker of the fifth embodiment of the present invention, the stored previous or previous heating output amount, or the final heating output amount of the fried food preheating step, and the current heating output amount, In other words, since the latest heating output amount is compared, as in the first to fourth embodiments of the present invention, it is possible to reliably determine that the object to be cooked has been input, and to input the object to be cooked. It is possible to perform control that quickly responds to the temperature drop of the oil due to.

  Moreover, even if a to-be-cooked material is input immediately after entering into the deep-fried food insulation process, by comparing with the final heating output amount in the deep-fried food preheating process, the input of the to-be-cooked object can be definitely determined and the reliability is improved.

Embodiment 6 FIG.
(Constitution)
Since the structure of the induction heating cooker of Embodiment 6 of this invention is the same as that of the induction heating cooker of Embodiment 2-4 of this invention, it abbreviate | omits here.

(Operation)
FIG. 18 is a flowchart showing the control of the induction heating cooker according to the sixth embodiment of the present invention, and FIG. 19 is a continuation of the flowchart of FIG. The operation will be described with reference to FIGS. 18 and 19 and FIGS. 7 and 8 used in the first to fifth embodiments of the present invention.

  As with the induction heating cookers according to the first to fifth embodiments of the present invention, when the user turns on the power switch 7, the control means 18 is activated. First, the built-in counter (not shown) is cleared and operated. After initial processing such as initial value setting necessary for starting is performed, input from the top operation unit 5 or the front operation unit 6 is enabled.

  Next, when the user inputs from the top surface operation unit 5 or the front surface operation unit 6, the control means 18 checks whether or not the input information is a cooking start command. If not, the cooking start command is input. Wait until

  For example, when fried food cooking is performed by the left induction heating means 11 from an input waiting state, after pressing an input key (not shown) of the fried food cooking mode, cooking information such as oil temperature and heating power is set and input, and cooking is started. When a switch (not shown) is pressed, an output control signal based on the heating power set by the cooking start command is sent to the inverter circuit 16, and the inverter circuit 16 starts supplying high-frequency power to the left induction heating means 11.

  When fried food cooking is started by the left induction heating means 11, a fried food preheating step for raising the temperature to a predetermined temperature at which oil can be cooked is started (S111). Preheating is performed with, for example, an output of 1000 W (S112). Although not described in the flowchart, the amount of warpage of the bottom surface of the article to be heated 10 and the amount of oil are also determined.

  The control means 18 determines a control temperature A ° C. for controlling the set predetermined temperature. For example, if the predetermined temperature set is 180 ° C., A ° C. = 180 ° C. Next, the determined control temperature A ° C. is compared with the detected temperature detected by the temperature detecting element and detected by the temperature detecting means (S113).

  When the detected temperature becomes A ° C. or higher in S113, the heating is turned off, and the heating ON time measured by the time measuring means 23 is stored in the storage means 20 (S114). The heating of the left induction heating means 11 is repeatedly turned on and off until the predetermined temperature is reached after the fried food preheating process is started.

  The heating is repeatedly turned on and off, and it is determined how many times the heating is turned off (S115). When the number of times of heating OFF has not reached the third time in S115, heating is continued if the detected temperature is lower than A ° C. (S116).

  When the number of times of heating OFF has reached the third time in S115, the latest heating ON time in the deep-fried food preheating process stored in the storage means 20, in other words, the final heating ON time in the deep-fried food preheating process is set as T1 (S117). Then, the deep-fried food preheating process is terminated, and the deep-fried food warming process is started (S118).

  The number of times of heating OFF is, for example, three times as in the first to fifth embodiments of the present invention, and is not limited to three times.

  In the deep-fried food insulation process, the oil temperature is controlled to be kept constant. The control temperature A ° C. is set so as to maintain the predetermined temperature (S119). It is determined whether or not the detected temperature is lower than the control temperature with respect to the set control temperature A ° C (S120).

  It is heated at 1000 W and it is determined whether the detected temperature is equal to or higher than the control temperature (S122). When the detected temperature is equal to or higher than the control temperature in S122, the heating is turned off, and the heating ON time measured by the time measuring means 23 is stored in the storage means 20 (S124). Thereafter, the temporary heating is turned off (S125), and the deep-fried food insulation process is continued.

  If the detected temperature is not higher than the control temperature in S122, set as LL, which is the ratio of the previous heating ON time to the current heating ON time, and MM, T1, which are the ratio of the previous heating ON time to the current heating ON time. NN which is a ratio of the last heating ON time of the deep-fried food preheating process and the current heating ON time of the deep-fried food warming process is calculated (S123).

  The previous heating ON time is T5 in FIG. 7, and the current heating ON time is T7. The previous heating ON time is T3. Similarly, it is T7 in FIG. 8, and this heating ON time is T9. Moreover, the heating ON time of the last time is T5. Then, the last heating ON time in the deep-fried food preheating process is the heating ON time at T1 in both FIGS.

  The calculated LL, MM, and NN are respectively compared with a predetermined determination value TX by the comparison unit 21 (S126). The ratio of the heating ON time that is stable in a state where the cooking object 30 is not charged is 1. The determination value TX is set as a numerical value greater than 1, TX> 1.

  When any value of LL, MM, and NN is larger than the determination value TX, it is determined that the to-be-cooked item 30 has been added. When the object to be cooked 30 is put in, the temperature of the oil is lowered, so that the heating ON time becomes longer to control the temperature to be raised to the control temperature A ° C. Therefore, any value of LL, MM, and NN also becomes large, and it can be judged whether the cooking object 30 has been input.

  Here, as a judgment, LL, which is the ratio of the previous heating ON time to the current heating ON time, or MM, which is the ratio of the previous heating ON time to the current heating ON time, and the last heating ON time set as T1 The use of NN, which is the ratio of the heating ON time and the current heating ON time of the fried food warming process, can be judged because T7 is clearly longer in the example as shown in the graph of FIG. On the other hand, in the example as shown in the graph of FIG. 8, it is possible to consider the case where it cannot be said that T7 which is the previous heating ON time is clearly longer than T9 which is the current heating ON time. is there.

  The example shown in the graph of FIG. 8 is different from the amount of oil, the set temperature, the type of pot used, and the difference in the amount of cooking load. In this case, even in such a case, it can be determined that T9 of the current heating ON time is clearly longer than T5 of the previous heating ON time.

  In addition, the last heating ON time in the deep-fried food preheating process is set as T1, and NN which is the ratio of the final heating ON time in the deep-fried food preheating process set as T1 and the current heating ON time in the deep-fried food warming process is calculated. The reason for this is to prevent the judgment from being lost when there is no stored data of the previous heating ON time of the fried food warming process when the cooked food 30 is put in immediately after switching from the fried food preheating process to the fried food warming process. It is.

  If it is determined in S126 that the food item 30 has been added, the heating output is changed to 1500 W (S127), and the control temperature is changed to C ° C higher than A ° C (S128). After heating to a control temperature C ° C. or higher with a heating output of 1500 W (S128), the heating is temporarily turned off (S129).

  Thereafter, heating is turned ON / OFF only once at a control temperature B ° C. higher than A ° C. and lower than C ° C. (S130), and the process returns to ON / OFF control of heating at the control temperature A ° C.

  As described above, according to the induction heating cooker of the sixth embodiment of the present invention, the stored previous heating time or the previous heating ON time, or the last heating ON time of the fried food preheating process, and the current heating ON time, In other words, since the latest heating ON time is compared, it is possible to reliably determine that the object to be cooked has been input as in the first to fifth embodiments of the present invention, and to input the object to be cooked. It is possible to perform control that quickly responds to the temperature drop of the oil due to.

  Moreover, even if a to-be-cooked material is input immediately after entering the deep-fried food insulation process, by comparing with the last heating ON time of the deep-fried food preheating process, the input of the to-be-cooked object can be definitely determined and the reliability is improved.

Embodiment 7 FIG.
(Constitution)
Since the configuration of the induction heating cooker according to the seventh embodiment of the present invention is the same as that of the induction heating cookers according to the second to fourth and sixth embodiments of the present invention, the description thereof is omitted here.

(Operation)
FIG. 20 is a flowchart showing the control of the induction heating cooker according to the seventh embodiment of the present invention, and FIG. 21 is a continuation of the flowchart of FIG. The operation will be described with reference to FIGS. 20 and 21 and FIGS. 7 and 8 used in the first to sixth embodiments of the present invention.

  As with the induction heating cookers according to the first to sixth embodiments of the present invention, when the user turns on the power switch 7, the control means 18 is activated. First, the built-in counter (not shown) is cleared or operated. After initial processing such as initial value setting necessary for starting is performed, input from the top operation unit 5 or the front operation unit 6 is enabled.

  Next, when the user inputs from the top surface operation unit 5 or the front surface operation unit 6, the control means 18 checks whether or not the input information is a cooking start command. If not, the cooking start command is input. Wait until

  For example, when fried food cooking is performed by the left induction heating means 11 from an input waiting state, after pressing an input key (not shown) of the fried food cooking mode, cooking information such as oil temperature and heating power is set and input, and cooking is started. When a switch (not shown) is pressed, an output control signal based on the heating power set by the cooking start command is sent to the inverter circuit 16, and the inverter circuit 16 starts supplying high-frequency power to the left induction heating means 11.

  When fried food cooking is started by the left induction heating means 11, a fried food preheating step for raising the temperature to a predetermined temperature at which the oil can be cooked is started (S141). For example, the preheating is performed with an output of 1000 W (S142). Although not described in the flowchart, the amount of warpage of the bottom surface of the article to be heated 10 and the amount of oil are also determined.

  The control means 18 determines a control temperature A ° C. for controlling the set predetermined temperature. For example, if the predetermined temperature set is 180 ° C., A ° C. = 180 ° C. Next, the determined control temperature A ° C. is compared with the detected temperature detected by the temperature detecting element and detected by the temperature detecting means (S143).

  When the detected temperature becomes A ° C. or higher in S143, the heating is turned off, and the heating OFF time counted by the time measuring means 23 is stored in the storage means 20 (S144). The heating of the left induction heating means 11 is repeatedly turned on and off until the predetermined temperature is reached after the fried food preheating process is started.

  The heating is repeatedly turned on and off, and it is determined how many times the heating is turned off (S145). If the number of times of heating OFF has not reached the third time in S145, heating is continued if the detected temperature is lower than A ° C. (S146).

  When the number of times of heating OFF reaches the third time in S145, the latest heating OFF time in the deep-fried food preheating process stored in the storage means 20, in other words, the final heating OFF time in the deep-fried food preheating process is set as T0 (S147). Then, the deep-fried food preheating process is finished, and the deep-fried food warming process is started (S148).

  The number of times of heating OFF is, for example, 3 times as in Embodiments 1 to 6, and is not limited to 3 times.

  In the deep-fried food insulation process, the oil temperature is controlled to be kept constant. The control temperature A ° C. is set so as to maintain a predetermined temperature (S149). It is determined whether the detected temperature is lower than the control temperature with respect to the set control temperature A ° C (S150). If the detected temperature is lower than 1000 ° C, heating is performed at 1000 W (S151).

  It is heated at 1000 W, and it is determined whether the detected temperature is equal to or higher than the control temperature (S152). If the detected temperature is equal to or higher than the control temperature in S152, the heating is turned off, and the heating OFF time measured by the time measuring means 23 is stored in the storage means 20 (S154). Thereafter, the temporary heating is turned off (S155), and the deep-fried food insulation process is continued.

  If the detected temperature is not equal to or higher than the control temperature in S152, set as OO, which is the ratio of the previous heating OFF time to the current heating OFF time, and PP, T0, which are the ratio of the previous heating OFF time to the current heating OFF time. QQ, which is the ratio of the last heating OFF time of the fried food preheating process and the current heating OFF time of the fried food warming process, is calculated (S153).

  The previous heating OFF time is T4 in FIG. 7, and the current heating OFF time is T6. The last heating OFF time is T2. Similarly, in FIG. 8, it is T6, and the current heating OFF time is T8. Also, the last heating OFF time is T4. Then, the final heating OFF time in the deep-fried food preheating step is the heating OFF time at time T0 in both FIGS.

  The calculated OO, PP, and QQ are respectively compared with a predetermined determination value TY by the comparison unit 21 (S156). The ratio of the heating OFF time that is stable in a state in which the cooking object 30 is not charged is 1. The determination value TY is set as a numerical value smaller than 1 and TY <1.

  When any value of OO, PP, and QQ is smaller than the determination value TY, it is determined that the food item 30 has been added. When the object to be cooked 30 is put in, the temperature of the oil decreases, so that the heating ON time becomes longer and the heating OFF time becomes shorter in order to increase the temperature to the control temperature A ° C. Therefore, any value of OO, PP, and QQ also becomes small, and it can be determined that the cooking object 30 has been charged.

  Here, as a judgment, the ratio of the previous heating OFF time to the current heating OFF time is 00, or the ratio of the previous heating OFF time to the current heating OFF time is PP, which is the ratio of the current heating OFF time. The QQ, which is the ratio of the heating OFF time and the current heating OFF time of the fried food warming process, is used in the example shown in the graph of FIG. This corresponds to the case where the difference is small compared to T8 which is the heating ON time.

  The example shown in the graph of FIG. 8 is different in the amount of oil, the set temperature, the type of pan used, and the difference in the amount of cooking load. Although it is an example that does not change, it is possible to make a judgment by using a plurality of comparison targets.

  In addition, the last heating OFF time in the deep-fried food preheating process is set as T0, and QQ which is the ratio of the final heating OFF time in the deep-fried food preheating process set as T0 and the current heating OFF time in the deep-fried food warming process is calculated. The reason for this is that if the cooked food 30 is put in immediately after the fried food preheating process is switched to the fried food warming process, there is no stored data of the previous heating OFF time in the fried food warming process, so that judgment cannot be made. It is.

  If it is determined in S156 that the food item 30 has been added, the heating output is changed to 1500 W (S157), and the control temperature is changed to C ° C higher than A ° C (S158). After heating to a control temperature C ° C. or higher at a heating output of 1500 W (S158), the heating is temporarily turned off (S159).

Thereafter, heating is turned ON / OFF only once at a control temperature B ° C. higher than A ° C. and lower than C ° C. (S160), and the process returns to ON / OFF control of heating at the control temperature A ° C.

  As described above, according to the induction heating cooker of the seventh embodiment of the present invention, the stored previous heating or previous heating OFF time, or the last heating OFF time of the fried food preheating process, and the current heating OFF time, In other words, since the latest heating OFF time is compared, it is possible to reliably determine that the object to be cooked has been input as in the first to sixth embodiments of the present invention, and to input the object to be cooked. It is possible to perform control that quickly responds to the temperature drop of the oil due to.

  Moreover, even if a to-be-cooked object is thrown in immediately after entering a fried food warming process, by comparing with the last heating OFF time of a fried food pre-heating process, the input of to-be-cooked object can be judged without fail, and certainty improves.

Embodiment 8 FIG.
(Constitution)
The configuration of the induction heating cooker according to the eighth embodiment of the present invention is the same as that of the induction heating cookers according to the second to fourth, sixth, and seventh embodiments of the present invention, and is therefore omitted here.

(Operation)
FIG. 22 is a flowchart showing the control of the induction heating cooker according to the eighth embodiment of the present invention, and FIG. 23 is a continuation of the flowchart of FIG. The operation will be described with reference to FIGS. 22 and 23 and FIGS. 7 and 8 used in the first to seventh embodiments of the present invention.

  Similarly to the induction heating cookers according to the first to seventh embodiments of the present invention, when the user turns on the power switch 7, the control means 18 is activated. First, the built-in counter (not shown) is cleared or operated. After initial processing such as initial value setting necessary for starting is performed, input from the top operation unit 5 or the front operation unit 6 is enabled.

  Next, when the user inputs from the top surface operation unit 5 or the front surface operation unit 6, the control means 18 checks whether or not the input information is a cooking start command. If not, the cooking start command is input. Wait until

  For example, when fried food cooking is performed by the left induction heating means 11 from an input waiting state, after pressing an input key (not shown) of the fried food cooking mode, cooking information such as oil temperature and heating power is set and input, and cooking is started. When a switch (not shown) is pressed, an output control signal based on the heating power set by the cooking start command is sent to the inverter circuit 16, and the inverter circuit 16 starts supplying high-frequency power to the left induction heating means 11.

  When fried food cooking is started by the left induction heating means 11, a fried food preheating process for raising the temperature to a predetermined temperature at which the oil can be cooked is started (S171). For example, the preheating is performed with an output of 1000 W (S172). Although not described in the flowchart, the amount of warpage of the bottom surface of the article to be heated 10 and the amount of oil are also determined.

  The control means 18 determines a control temperature A ° C. for controlling the set predetermined temperature. For example, if the predetermined temperature set is 180 ° C., A ° C. = 180 ° C. Next, the determined control temperature A ° C. is compared with the detected temperature detected by the temperature detecting element and detected by the temperature detecting means (S173).

  When the detected temperature becomes A ° C. or higher in S173, the heating is turned off, and the heating ON time and the heating OFF time measured by the time measuring means 23 are stored in the storage means 20 (S174). The heating of the left induction heating means 11 is repeatedly turned on and off until the predetermined temperature is reached after the fried food preheating process is started.

  The heating is repeatedly turned on and off, and it is determined how many times the heating is turned off (S175). If the number of times of heating OFF has not reached the third time in S175, heating is continued if the detected temperature is lower than A ° C. (S176).

  When the number of times of heating OFF reaches the third time in S175, the latest heating ON time + heating OFF time in the fried food preheating process stored in the storage means 20, in other words, the last heating ON time + heating OFF time in the fried food preheating process. Is set as T1 + T0 (S177), the deep-fried food preheating process is terminated, and the deep-fried food warming process is started (S178).

  The number of times of heating OFF is, for example, three times as in the first to third embodiments of the present invention, and is not limited to three times.

  In the deep-fried food insulation process, the oil temperature is controlled to be kept constant. The control temperature A ° C. is set so as to maintain the predetermined temperature (S179). It is determined whether or not the detected temperature is lower than the control temperature with respect to the set control temperature A ° C (S180).

  It is heated at 1000 W and it is determined whether the detected temperature is equal to or higher than the control temperature (S182). When the detected temperature is equal to or higher than the control temperature in S182, the heating is turned off, and the heating ON time and the heating OFF time measured by the time measuring means 23 are stored in the storage means 20 (S184). Thereafter, the temporary heating is turned off (S183), and the deep-fried food insulation process is continued.

  When the detected temperature is not equal to or higher than the control temperature in S182, SS is the ratio of the previous (heating ON time + heating OFF time) to the current (heating ON time + heating OFF time), the previous time (heating ON time + heating) OFF time) and the current (heating ON time + heating OFF time) ratio TT, the last (heating ON time + heating OFF time) of the fried food preheating process set as T1 + T0 and the current (heating ON) UU which is a ratio of time + heating OFF time is calculated (S183).

  The previous heating ON time + heating OFF time is T5 + T4 in FIG. 7, and the current heating ON time + heating OFF time is T7 + T6. Further, the heating ON time + heating OFF time of the last time is T3 + T2.

Similarly, in FIG. 8, it is T7 + T6, and this heating ON time + heating OFF time is T9 + T8. Moreover, the heating ON time + heating OFF time of the last time is T5 + T4.
Then, the final heating ON time + heating OFF time in the deep-fried food preheating step is the heating ON time + heating OFF time when T1 + T0 in both FIGS.

  The calculated SS, TT, and UU are respectively compared with a predetermined determination value TW by the comparison means 21 (S186). The ratio of the heating ON time + heating OFF time, which is stable in a state where the cooking object 30 is not charged, is 1. The determination value TW is set as a numerical value larger than 1 and TW> 1.

  When any value of SS, TT, and UU is larger than the determination value TW, it is determined that the to-be-cooked item 30 has been added. When the object to be cooked 30 is introduced, the temperature of the oil is lowered, so that the heating ON time becomes longer to control the temperature to be raised to the control temperature A ° C., so that the heating ON time + heating OFF time also becomes longer. Therefore, any value of SS, TT, and UU is also increased, and it is possible to determine whether to-be-cooked object 30 is inserted.

  Here, as a judgment, SS which is the ratio of the previous (heating ON time + heating OFF time) and the current (heating ON time + heating OFF time), or the previous time (heating ON time + heating OFF time) and this time ( TT, which is the ratio of heating ON time + heating OFF time), the last (heating ON time + heating OFF time) of the fried food preheating process set as T1 + T0 and the current (heating ON time + heating OFF time) of the fried food warming process One of the UUs that are ratios can be determined because T7 + T6 is clearly longer in the example as in the graph of FIG. 7, whereas in the example as in the graph of FIG. In consideration of the case where it cannot be said that T7 + T6, which is the heating ON time + heating OFF time, is clearly longer than T9 + T8, which is the current heating ON time + heating OFF time. That.

  The example shown in the graph of FIG. 8 is different from the amount of oil, the set temperature, the type of pot used, and the difference in the amount of cooking load. This is an example in which the time does not change significantly, but even in such a case, the current heating ON time + heating OFF time T9 + T8 is clearly longer than the previous heating ON time + heating OFF time T5 + T4. become able to.

  The last heating ON time + heating OFF time in the fried food preheating process is set as T1 + T0, and the last (heating ON time + heating OFF time) of the fried food preheating process set as T1 + T0 UU which is the ratio of time + heating OFF time) is calculated when the cooking object 30 is put in immediately after the fried food preheating process is switched to the fried food warming process, and the previous heating ON time of the fried food warming process. This is to prevent the judgment from being impossible because there is no storage data of the + heating OFF time.

  If it is determined in S186 that the food item 30 has been added, the heating output is changed to 1500 W (S187), and the control temperature is changed to C ° C higher than A ° C (S188). After heating to a control temperature C ° C. or higher at a heating output of 1500 W (S188), the heating is temporarily turned off (S189).

  Thereafter, heating is turned ON / OFF only once at a control temperature B ° C. higher than A ° C. and lower than C ° C. (S190), and the process returns to the heating ON / OFF control at the control temperature A ° C.

  As described above, according to the induction heating cooker of the eighth embodiment of the present invention, the stored previous heating time or the previous heating ON time + heating OFF time, or the final heating ON time + heating OFF time of the fried food preheating process. And the present heating ON time + heating OFF time, in other words, the latest heating ON time + heating OFF time, so that the food to be cooked is input as in the first to seventh embodiments of the present invention. It is possible to reliably determine that, and it is possible to perform control that quickly responds to a drop in the temperature of the oil due to the input of the object to be cooked.

  In addition, even if the food to be cooked is entered immediately after entering the deep-fried food warming process, it is definitely possible to judge the input of the food to be cooked by comparing it with the last heating ON time + heating OFF time in the fried food preheating process. Will improve.

  DESCRIPTION OF SYMBOLS 1 Main body, 2 Top plate, 3 Frame body, 4 Top plate, 5 Upper surface operation part, 6 Front operation part, 7 Power switch, 8 Cooking chamber, 9 Cooking chamber door, 10 Cooking container, 11 Left induction heating means, 11a Peripheral coil, 11b Outer coil, 12 Right induction heating means, 13 Central induction heating means, 14a Temperature detection element (contact type temperature sensor), 14b Temperature detection element (contact type temperature sensor), 15 Temperature detection element (non-contact type) Infrared sensor), 16 inverter circuit, 17 temperature detection means, 18 control means, 19 heating output amount measurement means, 20 storage means, 21 comparison means, 22 oil, 23 timing means, 30 to-be-cooked object, 100 induction heating cooker.

Claims (10)

A top plate on which a heated object as a cooking container is placed;
An induction heating means provided below the top plate for induction heating the object to be heated;
An inverter circuit for supplying AC power to the induction heating means;
A temperature detection element that is provided below the top plate and detects the temperature of the object to be heated;
A temperature detection means for converting the detection signal of the temperature detection element into a temperature and detecting the temperature of the object to be heated;
Control means for controlling power supply and stopping of the inverter circuit, and a heating output amount of the induction heating means, respectively;
A heating output amount measuring means for measuring a heating output amount of the induction heating means;
Storage means for storing the heating output amount measured by the heating output amount measuring means,
The control means includes a heat retaining step for controlling the temperature converted by the temperature detecting means to be a first control temperature so as to keep the temperature of the oil put in the object to be heated at a predetermined temperature; A fried food cooking mode consisting of one or more steps of
Further, the control means measures the heating output amount when the induction heating means is operated at a predetermined output by the heating output quantity measuring means a plurality of times, and the measured heating output quantity is stored in the storage means. And remember
Calculate the ratio of the latest heating output amount of the heat retaining step and the heating output amount measured last time stored in the storage means,
Calculating a ratio between the latest heating output amount and the heating output amount measured the last time stored in the storage means;
When any of these ratios is greater than a predetermined determination value, a control step of determining that an object to be cooked has been introduced into the object to be heated is provided.
If the said control means judges that the to-be-cooked object was thrown into the said to-be-heated object, it will change to 2nd control temperature higher than said 1st control temperature, and the heating output amount of the said induction heating means will be changed. An induction heating cooker characterized by being changed so as to be larger than a heating output amount before it is determined that the cooking object is put into the heating object. A top plate on which a heated object as a cooking container is placed;
An induction heating means provided below the top plate for induction heating the object to be heated;
An inverter circuit for supplying AC power to the induction heating means;
A temperature detection element that is provided below the top plate and detects the temperature of the object to be heated;
A temperature detection means for converting the detection signal of the temperature detection element into a temperature and detecting the temperature of the object to be heated;
Control means for controlling power supply and stopping of the inverter circuit, and a heating output amount of the induction heating means, respectively;
The induction heating means counts the ON time during which power is applied in a predetermined time width; and
Storage means for storing the ON time of the induction heating means timed by the time measuring means,
The control means includes a heat retaining step for controlling the temperature converted by the temperature detecting means to be a first control temperature so as to keep the temperature of the oil put in the object to be heated at a predetermined temperature; A fried food cooking mode consisting of one or more steps of
Further, the control means counts the ON time when the induction heating means is operated at a predetermined output by the timing means a plurality of times, and stores the measured ON time in the storage means, and ,
Calculating a ratio between the latest ON time of the heat retaining step and the previously measured ON time stored in the storage means;
Calculating a ratio between the latest ON time and the ON time measured in advance in the storage means;
When any of these ratios is greater than a predetermined determination value, a control step of determining that an object to be cooked has been introduced into the object to be heated is provided.
If the said control means judges that the to-be-cooked object was thrown into the said to-be-heated object, it will change to 2nd control temperature higher than said 1st control temperature, and the heating output amount of the said induction heating means will be changed. An induction heating cooker characterized by being changed so as to be larger than a heating output amount before it is determined that the cooking object is put into the heating object. A top plate on which a heated object as a cooking container is placed;
An induction heating means provided below the top plate for induction heating the object to be heated;
An inverter circuit for supplying AC power to the induction heating means;
A temperature detection element that is provided below the top plate and detects the temperature of the object to be heated;
A temperature detection means for converting the detection signal of the temperature detection element into a temperature and detecting the temperature of the object to be heated;
Control means for controlling power supply and stopping of the inverter circuit, and a heating output amount of the induction heating means, respectively;
The induction heating means measures the OFF time during which the energization is not performed in a predetermined time width; and
Storage means for storing the OFF time of the induction heating means timed by the time measuring means,
The control means includes a heat retaining step for controlling the temperature converted by the temperature detecting means to be a first control temperature so as to keep the temperature of the oil put in the object to be heated at a predetermined temperature; A fried food cooking mode consisting of one or more steps of
Further, the control means measures the OFF time when the induction heating means is operated at a predetermined output by the timing means a plurality of times, and stores the measured OFF time in the storage means, and ,
Calculating a ratio between the latest OFF time of the heat retaining step and the previously measured OFF time stored in the storage means;
Calculating a ratio between the latest OFF time and the OFF time measured in advance in the storage means;
When any of these ratios is smaller than a predetermined determination value, it comprises a control step of determining that the object to be cooked has been put into the object to be heated,
If the said control means judges that the to-be-cooked object was thrown into the said to-be-heated object, it will change to 2nd control temperature higher than said 1st control temperature, and the heating output amount of the said induction heating means will be changed. An induction heating cooker characterized by being changed so as to be larger than a heating output amount before it is determined that the cooking object is put into the heating object. A top plate on which a heated object as a cooking container is placed;
An induction heating means provided below the top plate for induction heating the object to be heated;
An inverter circuit for supplying AC power to the induction heating means;
A temperature detection element that is provided below the top plate and detects the temperature of the object to be heated;
A temperature detection means for converting the detection signal of the temperature detection element into a temperature and detecting the temperature of the object to be heated;
Control means for controlling power supply and stopping of the inverter circuit, and a heating output amount of the induction heating means, respectively;
A time-counting means for timing the ON time when the induction heating means is energized with a predetermined time width and the OFF time when the current is not energized with a predetermined time width;
Storage means for storing the ON time and the OFF time of the induction heating means timed by the time measuring means,
The control means includes a heat retaining step for controlling the temperature converted by the temperature detecting means to be a first control temperature so as to keep the temperature of the oil put in the object to be heated at a predetermined temperature; A fried food cooking mode consisting of one or more steps of
Further, the control means measures the ON time and the OFF time when the induction heating means is operated at a predetermined output by the timing means, and counts the ON time and the OFF time. Storing in the storage means, and
Calculating the ratio of the sum of the latest ON time and OFF time of the heat retaining step and the sum of the ON time and OFF time measured last time stored in the storage means;
Calculating a ratio between the latest sum of the ON time and the OFF time and the sum of the ON time and the OFF time measured in advance in the storage unit;
When any of these ratios is greater than a predetermined determination value, a control step of determining that an object to be cooked has been introduced into the object to be heated is provided.
When the control means determines that an object to be cooked has been introduced into the object to be heated, the control means changes to a second control temperature higher than the first control temperature, and the heating output amount of the induction heating means is An induction heating cooker that is changed so as to be larger than a heating output amount before it is determined that the cooking object has been put into the heating object. A top plate on which a heated object as a cooking container is placed;
An induction heating means provided below the top plate for induction heating the object to be heated;
An inverter circuit for supplying AC power to the induction heating means;
A temperature detection element that is provided below the top plate and detects the temperature of the object to be heated;
A temperature detection means for converting the detection signal of the temperature detection element into a temperature and detecting the temperature of the object to be heated;
Control means for controlling power supply and stopping of the inverter circuit, and a heating output amount of the induction heating means, respectively;
A heating output amount measuring means for measuring a heating output amount of the induction heating means;
Storage means for storing the heating output amount measured by the heating output amount measuring means,
The control means includes at least a preheating step for raising the temperature of the oil put in the heated object to a predetermined temperature, and the temperature so that the temperature of the oil put in the heated object is kept at a predetermined temperature. A fried food cooking mode configured by a heat-retaining step for controlling the temperature converted by the detection means to be the first control temperature,
Furthermore, the control means measures the heating output amount when the induction heating means is operated at a predetermined output by the heating output amount measuring means, and the preheating step or the heat retaining step or Storing both of the heating output amounts in the storage means; and
A ratio between the latest heating output amount stored in the storage unit and the heating output amount measured last time in the heating step stored in the storage unit;
A ratio of the latest heating output amount stored in the storage means to the latest heating output amount stored in the storage means and the heating output amount measured in the heat retaining step last time;
Calculating a ratio between the last heating output amount of the preliminary step stored in the storage unit and the latest heating output amount of the heat retaining step stored in the storage unit;
When any of these ratios is greater than a predetermined determination value, a control step of determining that an object to be cooked has been introduced into the object to be heated is provided.
If the said control means judges that the to-be-cooked object was thrown into the said to-be-heated object, it will change to 2nd control temperature higher than said 1st control temperature, and the heating output amount of the said induction heating means will be changed. An induction heating cooker characterized by being changed so as to be larger than a heating output amount before it is determined that the cooking object is put into the heating object. A top plate on which a heated object as a cooking container is placed;
An induction heating means provided below the top plate for induction heating the object to be heated;
An inverter circuit for supplying AC power to the induction heating means;
A temperature detection element that is provided below the top plate and detects the temperature of the object to be heated;
A temperature detection means for converting the detection signal of the temperature detection element into a temperature and detecting the temperature of the object to be heated;
Control means for controlling power supply and stopping of the inverter circuit, and a heating output amount of the induction heating means, respectively;
The induction heating means counts the ON time during which power is applied in a predetermined time width; and
Storage means for storing the ON time of the induction heating means timed by the time measuring means,
The control means includes at least a preheating step for raising the temperature of the oil put in the heated object to a predetermined temperature, and the temperature so that the temperature of the oil put in the heated object is kept at a predetermined temperature. A fried food cooking mode configured by a heat-retaining step for controlling the temperature converted by the detection means to be the first control temperature,
Further, the control means measures the ON time when the induction heating means is operated at a predetermined output by the time measuring means a plurality of times, and the preheating step or the heat retaining step or both of the time measured. Storing the ON time in the storage means; and
A ratio between the latest ON time of the heat retaining process stored in the storage means and the ON time previously measured in the heat retaining process stored in the storage means;
A ratio between the latest ON time of the heat retaining step stored in the storage means and the ON time measured in advance in the heat retaining step stored in the storage means;
Calculating a ratio between the last ON time of the preheating process stored in the storage means and the latest ON time of the heat retaining process stored in the storage means;
When any of these ratios is greater than a predetermined determination value, a control step of determining that an object to be cooked has been introduced into the object to be heated is provided.
If the said control means judges that the to-be-cooked object was thrown into the said to-be-heated object, it will change to 2nd control temperature higher than said 1st control temperature, and the heating output amount of the said induction heating means will be changed. An induction heating cooker characterized by being changed so as to be larger than a heating output amount before it is determined that the cooking object is put into the heating object. A top plate on which a heated object as a cooking container is placed;
An induction heating means provided below the top plate for induction heating the object to be heated;
An inverter circuit for supplying AC power to the induction heating means;
A temperature detection element that is provided below the top plate and detects the temperature of the object to be heated;
A temperature detection means for converting the detection signal of the temperature detection element into a temperature and detecting the temperature of the object to be heated;
Control means for controlling power supply and stopping of the inverter circuit, and a heating output amount of the induction heating means, respectively;
The induction heating means measures the OFF time during which the energization is not performed in a predetermined time width; and
Storage means for storing the OFF time of the induction heating means timed by the time measuring means,
The control means includes at least a preheating step for raising the temperature of the oil put in the heated object to a predetermined temperature, and the temperature so that the temperature of the oil put in the heated object is kept at a predetermined temperature. A fried food cooking mode configured by a heat-retaining step for controlling the temperature converted by the detection means to be the first control temperature,
Further, the control means measures the OFF time when the induction heating means is operated at a predetermined output by the time measuring means a plurality of times, and the time of the preheating step or the heat retaining step or both of them is measured. Storing OFF time in the storage means; and
A ratio between the latest OFF time of the heat retaining process stored in the storage means and the OFF time measured last time in the heat retaining process stored in the storage means;
A ratio between the latest OFF time of the heat retaining step stored in the storage means and the OFF time measured in advance in the heat retaining step stored in the storage means;
Calculating a ratio between the last OFF time of the preheating step stored in the storage means and the latest OFF time of the heat retaining step;
When any of these ratios is smaller than a predetermined determination value, it comprises a control step of determining that the object to be cooked has been put into the object to be heated,
If the said control means judges that the to-be-cooked object was thrown into the said to-be-heated object, it will change to 2nd control temperature higher than said 1st control temperature, and the heating output amount of the said induction heating means will be changed. An induction heating cooker characterized by being changed so as to be larger than a heating output amount before it is determined that the cooking object is put into the heating object. A top plate on which a heated object as a cooking container is placed;
An induction heating means provided below the top plate for induction heating the object to be heated;
An inverter circuit for supplying AC power to the induction heating means;
A temperature detection element that is provided below the top plate and detects the temperature of the object to be heated;
A temperature detection means for converting the detection signal of the temperature detection element into a temperature and detecting the temperature of the object to be heated;
Control means for controlling power supply and stopping of the inverter circuit, and a heating output amount of the induction heating means, respectively;
A time-counting means for timing the ON time when the induction heating means is energized with a predetermined time width and the OFF time when the current is not energized with a predetermined time width;
Storage means for storing the ON time and the OFF time of the induction heating means timed by the time measuring means,
The control means includes at least a preheating step for raising the temperature of the oil put in the heated object to a predetermined temperature, and the temperature so that the temperature of the oil put in the heated object is kept at a predetermined temperature. A fried food cooking mode configured by a heat-retaining step for controlling the temperature converted by the detection means to be the first control temperature,
Further, the control means measures the ON time and the OFF time when the induction heating means is operated at a predetermined output by the timing means, and counts the preheating step or the heat retaining step or Storing both the ON time and the OFF time in the storage means; and
The sum of the latest ON time and the OFF time of the heat retaining process stored in the storage means, and the sum of the ON time and the OFF time previously measured in the heat retaining process stored in the storage means. Ratio,
The sum of the latest ON time and the OFF time of the heat retention process stored in the storage means, and the sum of the ON time and the OFF time counted in advance in the heat retention process stored in the storage means The ratio of
The sum of the last ON time and the OFF time of the preliminary process stored in the storage means, and the latest ON time and the sum of the OFF times of the heat retention process stored in the storage means. Calculate the ratio,
When any of these ratios is greater than a predetermined determination value, a control step of determining that an object to be cooked has been introduced into the object to be heated is provided.
If the said control means judges that the to-be-cooked object was thrown into the said to-be-heated object, it will change to 2nd control temperature higher than said 1st control temperature, and the heating output amount of the said induction heating means will be changed. An induction heating cooker characterized by being changed so as to be larger than a heating output amount before it is determined that the cooking object has been put into the heating object.   When the temperature converted by the temperature detection means reaches the second control temperature, the control means changes to a third control temperature higher than the first control temperature and lower than the second control temperature, and The heating output amount of the induction heating means at the time of heating power is returned to the heating output amount before determining that the cooking object has been put into the heated object, and the temperature converted by the temperature detecting means is the third temperature. 9. The control according to claim 1, wherein the control temperature is controlled to return to the first control temperature when the temperature reaches the third control temperature again after the temperature is once lower than the control temperature. Induction heating cooker.   The temperature detection element is a contact-type temperature sensor that detects the temperature of the object to be heated by contacting the back surface of the top plate, or a non-contact type that detects the infrared energy of the object to be heated in a non-contact manner and converts it into a temperature. The induction heating cooker according to any one of claims 1 to 8, wherein the induction heating cooker is any one of the infrared sensors.

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