JP2010287365A - Induction heating cooker and program for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an induction heating cooker capable of accurately detecting the temperature of a cooking object and promoting penetration of a flavoring material to the cooking object. <P>SOLUTION: The induction heating cooker includes: an infrared ray sensor 106 for detecting infrared rays emitted from a cooking container 101; a first predetermined temperature control means 105a for controlling electric current applied to a heating coil 104 based on output of the infrared ray sensor 106 and maintaining the cooking container 101 at a temperature within a predetermined range from a first predetermined temperature; a second predetermined temperature control means 105b maintaining a temperature within a predetermined range from a second predetermined temperature lower than the first predetermined temperature; and a temperature switching means 105c for switching the first predetermined temperature control means 105a and the second predetermined temperature control means 105b. Thus, this can promote penetration of a flavoring material to a cooking object. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an induction heating cooker used in general homes, restaurants, offices, and the like.

  In recent years, induction cooking devices that induction-heat cooking containers such as pans and frying pans with a heating coil have become widespread.

  In addition, a cooking device is known that promotes the penetration of seasonings into the cooked food by managing the temperature of the broth in boiled food and repeating heating and natural cooling (see, for example, Patent Document 1).

JP 11-123140 A

  However, in the conventional configuration, there is a top plate between the cooking vessel and the thermal element that detects the temperature of the cooking vessel, and the heat of the cooking vessel is transmitted through the top plate by heat conduction, and then is transmitted to the thermal element. There was a delay in detection, and the temperature of the cooking container could not be detected with high accuracy. As a result, there was a problem that the penetration of the seasoning into the cooked product could not be sufficiently promoted.

  This invention solves the said conventional subject, and it aims at providing the induction heating cooking appliance which can detect the temperature of a foodstuff accurately and can promote penetration of the seasoning to a foodstuff. To do.

  In order to solve the conventional problem, an induction heating cooker according to the present invention includes a top plate on which a cooking container for heating a cooked product is placed, a heating coil for generating an induction magnetic field for heating the cooking container, Control means for heating the cooking container by controlling a high-frequency current applied to the heating coil, an infrared sensor for detecting infrared energy radiated from the cooking container via the top plate, and an output of the infrared sensor And controlling the high-frequency current applied to the heating coil based on the first predetermined temperature control means for maintaining the temperature of the cooking vessel from a first predetermined temperature to a temperature within a predetermined width, and an output of the infrared sensor. The temperature of the cooking container is controlled within a predetermined range from a second predetermined temperature lower than the first predetermined temperature by controlling a high-frequency current applied to the heating coil based on A second predetermined temperature control means for maintaining, those having a temperature switching means for switching a first predetermined temperature control means and the second predetermined temperature control means.

  Accordingly, the temperature of the cooking container is detected instantaneously and accurately by the infrared sensor, and the heating is controlled by switching the first predetermined temperature control means and the second predetermined temperature control means. Can be promoted.

  The induction cooking device of the present invention can promote the penetration of the seasoning into the cooked product.

The block diagram of the induction heating cooking appliance in Embodiment 1 of this invention The flowchart which shows the operation | movement sequence of the induction heating cooking appliance in Embodiment 1 of this invention. The figure which shows the continuation of the flowchart which shows the operation | movement sequence of the induction heating cooking appliance in Embodiment 1 of this invention. Graph of cooking vessel 101 and cooking object temperature of induction heating cooker in Embodiment 1 of the present invention The block diagram of the induction heating cooking appliance in Embodiment 2 of this invention The flowchart which shows the operation | movement sequence of the induction heating cooking appliance in Embodiment 2 of this invention. The figure which shows the continuation of the flowchart which shows the operation | movement sequence of the induction heating cooking appliance in Embodiment 2 of this invention.

  The first invention controls the cooking by controlling a top plate on which a cooking container for heating a cooking object is placed, a heating coil for generating an induction magnetic field for heating the cooking container, and a high-frequency current applied to the heating coil. Control means for heating the container, an infrared sensor for detecting infrared energy radiated from the cooking container via the top plate, and a high-frequency current applied to the heating coil based on the output of the infrared sensor The first predetermined temperature control means for keeping the temperature of the cooking container from a first predetermined temperature to a temperature within a predetermined range, and a high-frequency current applied to the heating coil based on the output of the infrared sensor are controlled. Thus, the second predetermined temperature control means, the first predetermined temperature control means, and the second predetermined temperature control for keeping the temperature of the cooking container at a temperature within a predetermined range from the second predetermined temperature. Those having a temperature switching means for switching the means.

  Accordingly, since the temperature of the cooking container is directly detected, the temperature of the cooking container can be detected instantaneously and accurately, and the penetration of the seasoning into the cooked product can be promoted.

  In a second aspect of the invention, in particular, in the first aspect of the invention, the temperature of the cooked product is detected from the change amount / change time of the output of the infrared sensor, and the temperature switching means is configured to detect the temperature of the cooked product and the cooking container. If it is determined that the temperatures of the cooking objects match, the temperature switching means for switching between the first predetermined temperature control means and the second predetermined temperature control means is provided, so that the temperature of the cooked food is determined from the temperature of the cooking container detected by the infrared sensor. Can be detected with high accuracy, and penetration of the seasoning into the cooked product can be promoted.

  In particular, according to a third invention, in the first or second invention, a thickness detecting means for detecting the thickness of the cooking container, a first predetermined temperature control means and a second predetermined temperature control means based on the thickness of the cooking container. Since the temperature switching means for switching between the cooked food and the cooking container, the temperature difference between the cooked food and the cooked container is absorbed, so that the penetration of the seasoning into the cooked food can be promoted.

  In a fourth aspect of the present invention, in particular, in any one of the first to third aspects of the invention, by providing the cooling means for cooling the cooking container from the first predetermined temperature to the second predetermined temperature, It becomes possible to repeat heating and cooling of the cooked product, and it is possible to promote the penetration of the seasoning into the cooked product.

  According to a fifth aspect of the invention, in particular, in any one of the first to fourth aspects of the invention, the first predetermined temperature is set to 90 to 99 ° C. and the second predetermined temperature is set to 80 to 95 ° C. A predetermined temperature of 90 to 99 ° C. is a temperature at which the food does not boil, and a second predetermined temperature of 80 to 95 ° C. is lower than the first predetermined temperature, but a temperature sufficient to boil the food. is there.

Thereby, while promoting the penetration of the seasoning into the cooked product, it is possible to prevent the cooked product from collapsing, shrinking, and crunchy, and preventing the cooked product from boiling over by constantly boiling the cooked product. .

  In particular, the sixth invention provides a program for causing a computer to execute at least one of the induction heating cookers of any one of the first to fifth inventions.

  Since it is a program, at least a part of the induction heating cooker of the present invention can be easily realized by cooperating hardware resources such as an electric / information device, a computer, and a server. In addition, the program can be distributed / updated and installed easily by recording on a recording medium or distributing the program using a communication line.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 shows a configuration diagram of an induction heating cooker according to the first embodiment of the present invention.

  In FIG. 1, an induction heating cooker heats a cooking container 101 for storing cooked food, an outer case 102, a top plate 103 provided on the upper part of the outer case 102, on which the cooking container 101 is placed, and the cooking container 101. Heating coil 104 for generating an induction magnetic field to be generated, control means 105 for heating the cooking vessel 101 by controlling a high-frequency current applied to the heating coil 104, and infrared energy radiated from the cooking vessel 101 via the top plate 103 An infrared sensor 106 for detecting the above is provided.

  Moreover, the control means 105 controls the high frequency current applied to the heating coil 104 based on the output of the infrared sensor 106, thereby maintaining the temperature of the cooking vessel 101 from 98 ° C. to a temperature within a predetermined width. 105a, second predetermined temperature control means 105b for maintaining the temperature of cooking vessel 101 within a predetermined range from 90 ° C., and temperature switching means 105c for switching between the first predetermined temperature control means and the second predetermined temperature control means. It is composed.

  The cooking container 101 is a pan, the outer case 102 is a metal case, the top plate 103 is a glass plate, the control means 105 is a microcomputer, the infrared sensor 106 is a photodiode, and the input means 107 is Can easily realize this configuration by using a capacitive switch.

  About the induction heating cooking appliance comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  2 and 3 are flowcharts showing an operation sequence of the induction heating cooker according to the first embodiment of the present invention.

  FIG. 4 is a graph of the temperature of the cooking container 101 of the induction heating cooker and the food in the first embodiment of the present invention.

  First, when the user presses the cut-off switch of the input unit 107 and the control unit 105 accepts (S101), the control unit 105 operates the temperature switching unit 105c, and the temperature switching unit 105c performs the first predetermined temperature control for the first time. The means 105a is operated (S102).

The first predetermined temperature control means 105a applies power to the heating coil 104 and starts heating the cooking vessel 101 (S103). Thereafter, the first predetermined temperature control means 105a operates the infrared sensor 106 to detect infrared energy radiated from the cooking container 101 (S104).

  When a photodiode is used for the infrared sensor 106, a current flows through the photodiode due to the photovoltaic effect. The infrared energy radiated from the cooking vessel 101 can be easily detected as a voltage value by amplifying it with an operational amplifier after voltage conversion.

  Thereafter, the first predetermined temperature control means 105a converts the output value of the infrared sensor 106 detected in S104 into a temperature, and when it is determined to be 98 ° C. or lower (yes in S105), returns to S104 and continues heating the cooking vessel 101.

  If it determines with 98 degreeC or more (it is no at S105), the 1st predetermined temperature control means 105a will stop the application of the electric power to the heating coil 104, and will stop the heating of the cooking container 101 (S106). However, at this time, a delay occurs due to the inertia of the thermal energy of the cooking container and the like, and the temperature of the cooking container 101 rises from 98 ° C. by a predetermined temperature.

  Then, the temperature switching means 105c starts measuring the heating stop time (S107).

  And the 1st predetermined temperature control means 105a operates the infrared sensor 106, detects the infrared energy radiated | emitted from the cooking container 101 (S108), converts an output value into temperature, and if it determines with 98 degreeC or more (in S109) yes) Returning to S108, heating of the cooking container 101 is stopped.

  When it is determined that the temperature is 98 ° C. or less (no in S109), the temperature switching unit 105c finishes counting the heating stop time (S110), and determines whether the heating stop time is equal to or longer than a predetermined time (S111).

  When the food in the cooking container 101 is at a low temperature, the time until the cooking container 101 is lowered to 98 ° C. after the heating is stopped is shortened, and when the food in the cooking container 101 is at a high temperature, the cooking container after the heating is stopped. The time until 101 decreases to 98 ° C. becomes longer.

  In S111, using this principle, the heating stop time when the cooked product is 98 ° C. as the predetermined time is stored in the temperature switching means 105c in advance, and it is determined whether the cooked product is longer than the predetermined time. Judge whether it is 98 ° C or higher.

  If it is determined that the heating stop time is equal to or less than the predetermined time, that is, it is determined that the cooked product is 98 ° C. or less (yes in S111), the process returns to S103, and heating and stopping of the cooking container 101 and counting of the heating stop time are repeated.

  At this time, a delay occurs due to the inertia of the thermal energy of the cooking container or the like until the heating is started in S103, and the temperature of the cooking container 101 is lowered from 98 ° C. by a predetermined temperature.

  If it is determined that the heating stop time is equal to or longer than the predetermined time, that is, it is determined that the food is 98 ° C. or higher (no in S111), the temperature switching means 105c operates the second predetermined temperature control means 105b (S112).

  The second predetermined temperature control means 105b stops applying the electric power to the heating coil 104, stops heating the cooking vessel 101 (S113), and the temperature switching means 105c starts measuring the heating stop time (S114).

  And the 2nd predetermined temperature control means 105b operates the infrared sensor 106, detects the infrared energy radiated | emitted from the cooking container 101 (S115), converts an output value into temperature, and if it determines with 90 degreeC or more (in S116) yes) Return to S115 and continue to stop heating the cooking container 101.

  When it is determined that the temperature is 90 ° C. or less (no in S116), the temperature switching unit 105c finishes counting the heating stop time (S117), and determines whether the heating stop time is a predetermined time or less (S118).

  Here, the heating stop time when the food is 90 ° C. is stored in advance in the temperature switching means 105c as the predetermined time, and it is determined whether or not the food is 90 ° C. or less by determining whether the heating stop time is equal to or less than the predetermined time. judge.

  When it is determined that the heating stop time is equal to or shorter than the predetermined time, that is, when the cooked material is determined to be 90 ° C. or lower (yes in S118), the process returns to S102.

  If it is determined that the heating stop time is equal to or longer than the predetermined time, that is, it is determined that the food is 90 ° C. or higher (no in S118), the second predetermined temperature control means 105b applies power to the heating coil 104 to heat the cooking container 101. Start (S119).

  However, in reality, a delay occurs due to the inertia of the heat energy of the cooking container or the like, and the temperature of the cooking container 101 is lowered from 90 ° C. by a predetermined temperature.

  After that, the first predetermined temperature control means 105b operates the infrared sensor 106 to detect infrared energy radiated from the cooking vessel 101 (S120), converts the output value into a temperature, and determines that it is 90 ° C. or less (S121). Yes) Return to S120 and continue heating the cooking vessel 101.

  If it determines with 90 degreeC or more (it is no at S121), it will return to S113 and the heating of the cooking container 101 will be stopped. However, in reality, a delay occurs due to the inertia of thermal energy of the cooking container and the like, and the temperature of the cooking container 101 rises from 90 ° C. by a predetermined temperature.

  As described above, in the present embodiment, the temperature of the cooking container is instantaneously and accurately detected by the infrared sensor, and the first predetermined temperature control means and the second predetermined temperature control means are switched to control heating, By comparing the heating stop time with a predetermined time and determining the temperature of the cooked product, the temperature accuracy of the cooked product can be increased and the penetration of the seasoning can be promoted.

(Embodiment 2)
FIG. 5 shows a block diagram of an induction heating cooker in the second embodiment of the present invention.

  In FIG. 5, the induction heating cooker has a thickness detecting unit 105 d that detects the thickness of the cooking container 101, and temperature switching that switches between the first predetermined temperature control unit 105 a and the second predetermined temperature control unit 105 b based on the thickness of the cooking container 101. A means 105c and a cooling means 201 for cooling the cooking vessel 101 from the first predetermined temperature to the second predetermined temperature are provided. Since other means are the same as those in FIG. 1, detailed description will be omitted.

  This configuration can be easily realized by using a microcomputer for the thickness detecting means 105d and the temperature switching means 105c and using a sirocco fan for the cooling means 201.

  About the induction heating cooking appliance comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  6 and 7 are flowcharts showing an operation sequence in the second embodiment of the present invention.

  S101 is the same as that in FIG. 2 and will not be described in detail.

  First, after S101, the control means 105 operates the thickness detection means 105d, the thickness detection means 105d applies power to the heating coil 104 to heat the cooking container 101, and stops after a predetermined time has elapsed (S201).

  Here, the predetermined time is a short time during which the cooking container 101 is heated, but the heat of the cooking container 101 hardly conducts heat to the food inside (for example, 5 seconds), and is stored in advance in the thickness detection means 105d.

  Then, the thickness detection unit 105d operates the infrared sensor 106 to detect infrared energy emitted from the cooking container 101 (S202), and detects the thickness of the cooking container 101 based on the output value (S203).

  When the thickness of the cooking container 101 is small, the heat capacity is small, so the temperature of the cooking container 101 rises rapidly by heating for a short time, whereas when the thickness of the cooking container 101 is thick, the heat capacity is large, so the cooking container 101 The temperature is difficult to rise.

  Using this principle, the thickness of the cooking vessel 101 and information on the temperature rise due to heating for a predetermined time are stored in advance in the thickness detecting means 105d, and the thickness of the cooking vessel 101 is detected from the output value of the infrared sensor 106.

  In addition, when the food in the cooking container 101 is at a low temperature, the time until the cooking container 101 is lowered to a predetermined temperature after heating is shortened. When the food in the cooking container 101 is at a high temperature, after the heating is stopped. The time until the cooking container 101 is lowered to the predetermined temperature is increased.

  In S111 and S118, using this principle, the heating stop time when the food is at a predetermined temperature is stored in advance in the temperature switching means 105c as the predetermined time, and cooking is performed by determining whether the heating stop time is equal to or longer than the predetermined time. Determine if the object is above a certain temperature.

  However, the temperature difference between the cooking container 101 and the cooked product differs depending on the thickness of the cooking container 101. When the cooking container 101 is thin, the temperature difference is small, and when the cooking container 101 is thick, the temperature difference is large.

  Therefore, using this principle, information on the thickness of the cooking container 101 and the temperature difference between the cooking container 101 and the cooked food is stored in the thickness detecting means 105d in advance, and whether the cooked food generated by the thickness of the cooking container 101 is equal to or higher than a predetermined temperature The error of a predetermined time when determining whether or not is corrected (S204).

  Thereafter, S102 to S112 are processed. S102 to S112 are the same as those in FIGS. 2 and 3 and will not be described in detail.

After S112, the second predetermined temperature control means 105b operates the cooling means 201, the cooling means 201 cools the cooking container 101 (S205), and the second predetermined temperature control means 105b operates the infrared sensor 106 to cook the cooking container. The infrared energy radiated from 101 is detected (S206), the output value is converted into a temperature, and cooling is continued until it becomes 90 ° C. or less (no in S207).
).

  If it becomes 90 degrees C or less (it is Yes at S207), the 2nd predetermined temperature control means 105b will stop the cooling means 201, and will change to S119. Then, the processing from S113 to S121 is repeated. Steps S113 to S121 are the same as those in FIG. 3 and will not be described in detail.

  The same effect can be obtained even if the cooling means 201 is provided above the top plate 103.

  The same effect can be obtained even if a Peltier element is used as the cooling means 201.

  The means described in this embodiment cooperates with hardware resources such as a CPU (or microcomputer), a RAM, a ROM, a storage / recording device, an electric / information device including an I / O, a computer, a server, and the like. You may implement with the form of the program to be made. In the form of a program, new functions can be distributed / updated and installed easily by recording them on a recording medium such as magnetic media or optical media or distributing them using a communication line such as the Internet.

  As described above, since the induction heating cooker according to the present invention directly detects the temperature of the cooking container, it becomes possible to detect the temperature at the bottom of the pot instantaneously, and by maintaining the temperature of the cooking container at a constant value with high accuracy, The cooking performance and convenience of cooking heat can be improved, and it is effective for induction heating cookers used in ordinary homes.

DESCRIPTION OF SYMBOLS 101 Cooking container 103 Top plate 104 Heating coil 105 Control means 105a 1st predetermined temperature control means 105b 2nd predetermined temperature control means 105c Temperature switching means 105d Thickness detection means 106 Infrared sensor 201 Cooling means

Claims (6)

A top plate for placing a cooking container for heating the cooking object, a heating coil for generating an induction magnetic field for heating the cooking container, and a control for heating the cooking container by controlling a high-frequency current applied to the heating coil. Means, an infrared sensor for detecting infrared energy radiated from the cooking container via the top plate, and a high-frequency current applied to the heating coil based on an output of the infrared sensor, thereby controlling the cooking The first predetermined temperature control means for keeping the temperature of the container within a predetermined range from the first predetermined temperature, and the high frequency current applied to the heating coil based on the output of the infrared sensor, thereby controlling the cooking container A second predetermined temperature control means for maintaining the temperature of the second predetermined temperature from a second predetermined temperature lower than the first predetermined temperature within a predetermined range; a first predetermined temperature control means; Induction heating cooker comprising a temperature switching means for switching the temperature control means. When the temperature of the cooked food is detected from the change amount / change time of the output of the infrared sensor, and the temperature switching means determines that the temperature of the cooked food matches the temperature of the cooking container, first predetermined temperature control means; The induction heating cooker according to claim 1, further comprising temperature switching means for switching the second predetermined temperature control means. 3. The induction heating according to claim 1, further comprising: a thickness detection unit that detects a thickness of the cooking container; and a temperature switching unit that switches between a first predetermined temperature control unit and a second predetermined temperature control unit based on the thickness of the cooking container. Cooking device. The induction heating cooking appliance of any one of Claims 1-3 provided with the cooling means which cools the said cooking container from 1st predetermined temperature to 2nd predetermined temperature. The induction heating cooker according to any one of claims 1 to 4, wherein the first predetermined temperature is 90 to 99 ° C, and the second predetermined temperature is 80 to 95 ° C. A program for causing a computer to execute at least one of the induction heating cookers according to any one of claims 1 to 5.

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