JP5494087B2 - Induction heating cooker - Google Patents

Description

  The present invention relates to an induction heating cooker having a scoring detection function, and more particularly to an induction heating cooker that enables highly accurate scoring detection in a normal heating mode.

  Conventionally, this type of induction heating cooker is obtained from an infrared detector that detects infrared rays emitted from the bottom surface of a cooking vessel, a temperature detector that detects the temperature of the cooking vessel from the output of the infrared detector, and a temperature detector. It is determined whether or not it has burned from the temperature gradient of the given temperature, and has a control unit that controls the input power, the control unit calculates a temperature difference at a predetermined time, and the temperature gradient of the cooking container is equal to or greater than the predetermined temperature difference. It has the structure which determines with having burned when it detects continuously (for example, refer patent document 1).

JP 2007-115515 A

  However, in the conventional configuration, when the cooking container is improperly placed, a correct temperature gradient cannot be obtained, and scoring detection works in an unnecessary scene, or scoring detection is detected in a necessary scene. I had the problem of not working.

  The present invention solves the above-mentioned conventional problem, and even when a cooking container is improperly placed, the burn detection function works in an unnecessary scene, or the burn detection does not work in a necessary scene. Aim to provide no induction heating cooker.

  In order to solve the conventional problem, an induction heating cooker according to the present invention includes a top plate for placing a cooking vessel, a heating coil that is provided below the top plate and induction-heats the cooking vessel, An inverter circuit that supplies a high-frequency current to the heating coil, a thermal element that contacts the lower surface of the top plate and detects the temperature of the cooking vessel via the top plate, and a temperature of the cooking vessel that is detected by the thermal element However, when the first predetermined temperature is reached, when the cooked food is burnt on the bottom of the cooking container and the burnt detection unit outputs burnt information, and when the detected temperature of the thermal element exceeds the first predetermined temperature. Includes a control unit that controls the output of the inverter circuit so that the detected temperature of the thermal element falls within a predetermined temperature range, and the burnt detection unit includes a detected temperature of the thermal element within the predetermined temperature range. It is obtained so as to output the scorching information when it is maintained.

  Thus, even when the cooking container is improperly placed, it is possible to realize a scoring detection function in which a scoring detection function works in an unnecessary scene or a scoring detection function does not work in a necessary scene. .

The induction heating cooker of the present invention has a scoring detection function in which the scoring detection function works in an unnecessary scene even when the cooking container is improperly placed, or the scoring detection does not work in a necessary scene. Can be realized,
Usability can be improved.

The block diagram of the induction heating cooking appliance in Embodiment 1 of this invention The figure explaining operation | movement of the burning detection part of the induction heating cooking appliance in Embodiment 1 of this invention. The block diagram of the induction heating cooking appliance in Embodiment 3 of this invention The block diagram of the induction heating cooking appliance in Embodiment 4 of this invention The block diagram of the induction heating cooking appliance in Embodiment 6 of this invention The block diagram of the induction heating cooking appliance in Embodiment 7 of this invention (A) The figure showing that the cooking container at the time of seeing from the top of the induction heating cooking appliance in Embodiment 7 of this invention is mounted improperly, (b) Induction in Embodiment 7 of this invention The figure showing that the cooking container at the time of seeing from the side of a heating cooker is improperly placed The figure explaining operation | movement of the burning detection part of the induction heating cooking appliance in Embodiment 7 of this invention.

  1st invention, the top plate for mounting a cooking vessel, the heating coil which is provided under the top plate and induction-heats the cooking vessel, the inverter circuit which supplies a high frequency current to the heating coil, A thermosensitive element that contacts the lower surface of the top plate and detects the temperature of the cooking container via the top plate, and a bottom of the cooking container when the temperature of the cooking container detected by the thermosensitive element reaches a first predetermined temperature. A burnout detection unit for detecting that the food is burnt and outputting burnt information; and when the detection temperature of the thermal element exceeds the first predetermined temperature, the detection temperature of the thermal element is within a predetermined temperature range. And a control unit for controlling the output of the inverter circuit so that the scoring detection unit outputs scoring information when the detected temperature of the thermal element is maintained within the predetermined temperature range. One in which the. Thus, even when the cooking container is improperly placed, it is possible to realize a scoring detection function in which a scoring detection function works in an unnecessary scene or a scoring detection function does not work in a necessary scene. .

  In the second invention, in particular, the burnt detection unit of the first invention is configured to output burnt information after a predetermined time has elapsed after the detection temperature of the thermal element reaches the first predetermined temperature. is there. As a result, even when the cooking container is improperly placed, the cooking mode can be specified more accurately, and the burn detection function works in unnecessary scenes, or the burn detection does not work in necessary scenes. It is possible to realize a scoring detection function that never happens.

  In particular, the third invention includes an integrated power measuring unit that measures integrated power in the induction heating cooker of the first invention, and the burn detection unit receives burn information after reaching a predetermined integrated power value. It is designed to output. By this, cooking mode can be specified accurately by measuring the integrated power instead of measuring time, and the burnt detection function works in unnecessary scenes, or the burnout detection does not work in necessary scenes A non-burning detection function can be realized.

  The fourth invention, in particular, in the induction heating cooker of any one of the first to third inventions, further comprises an output setting unit for selecting one heating output from a plurality of heating output setting values, and the output setting When the heating output set value set by the unit is outside the predetermined range, the burn detection unit is configured not to output burn information. By this, when the high heating output setting value often used when fried food is cooked, detection of scorching is not performed, and after cooking at a high heating output setting value at the beginning of boiled food, changing to a low heating output setting value In addition, the burn detection function can be used accurately.

  In a fifth aspect of the invention, in particular, in the induction heating cooker according to any one of the first to fourth aspects of the invention, when the burnt detection unit outputs burnt information, the control unit stops the heating operation or outputs the inverter circuit. This is intended to lower the value. This makes it possible to prevent the cooked food from scorching on the bottom of the cooking container.

  In particular, the sixth invention is the induction heating cooker according to any one of the first to fifth inventions, further comprising a notifying unit, wherein the notifying unit notifies that when the scoring detection unit outputs scoring information. It is a thing. Accordingly, it is possible to notify the user of burnt information, and it is possible to continue cooking without being burnt by responding to the user.

  In a seventh aspect of the invention, in particular, in the induction heating cooker of any one of the first to sixth aspects of the invention, the induction cooking device includes an infrared sensor that is provided below the top plate and detects infrared rays radiated from the bottom surface of the cooking container, The unit outputs burnt information when the temperature of the cooking container detected by the thermal element reaches a first predetermined temperature, and the temperature of the cooking container detected by the infrared sensor is lower than the first predetermined temperature. 2 When a predetermined temperature is reached, it is detected that the cooked food has burned to the bottom of the cooking container, and burnt information is output. Thus, even when the cooking container is improperly placed, it is possible to realize a scoring detection function in which a scoring detection function works in an unnecessary scene or a scoring detection function does not work in a necessary scene. .

  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 is a block diagram of the induction heating cooker according to the first embodiment of the present invention, and FIG. 2 is a diagram for explaining the operation of the scoring detection unit of the induction heating cooker according to the first embodiment of the present invention. .

  In FIG. 1, a top plate 2 for placing the cooking vessel 1, a heating coil 3 provided below the top plate 2 for induction heating the cooking vessel 1, and an inverter circuit 4 for supplying a high-frequency current to the heating coil 3. And the thermosensitive element 5 that contacts the lower surface of the top plate 2 and detects the temperature of the cooking container 1 via the top plate 2, and the temperature of the cooking container 1 detected by the thermosensitive element 5 is a first predetermined temperature (for example, 270 ° C.). ) When the cooked object is detected on the bottom of the cooking container 1 and the burned-out detection unit 6 outputs burnt information, and the detected temperature of the thermal element 5 exceeds a first predetermined temperature (for example, 270 ° C.). Includes a control unit 7 that controls the output of the inverter circuit 4 so that the detected temperature of the thermosensitive element 5 is within a predetermined temperature range (for example, 260 ° C. to 270 ° C.).

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

  As shown in FIG. 2, when the detection temperature of the thermal element 5 reaches a first predetermined temperature (for example, 270 ° C.), the burn detection unit 6 outputs burn information, and the detection temperature of the thermal element 5 is predetermined by the control unit 7. It is maintained within a temperature range (for example, 260 ° C. to 270 ° C.).

  When the detected temperature of the thermal element 5 is maintained within a predetermined temperature range (for example, 260 ° C. to 270 ° C.), the burn detection unit 6 outputs information that the cooked food has burned to the bottom of the cooking container 1.

  With the configuration as described above, a burn-in detection function that does not cause the burn-in detection function to work in an unnecessary scene even when the cooking container 1 is improperly placed or does not work in a necessary scene. Can be realized.

(Embodiment 2)
Next, a second embodiment of the present invention will be described. Description of the same parts as those in the first embodiment will be omitted, and only differences will be described.

  The difference from the first embodiment is that the scoring detection unit 6 has a predetermined time t1 (for example, 120 seconds) after the detection temperature of the thermal element 5 reaches the first predetermined temperature (for example, 270 ° C.). This is the point that the burned information is output.

  With the above configuration, even when the cooking container 1 is improperly placed, by waiting for a predetermined time t1 (for example, 120 seconds), if there is a load fluctuation during that time, the fried food is cooked. It is possible to determine the cooking mode more accurately, and it is possible to specify the cooking mode more accurately, and the scoring detection function works in unnecessary scenes, or the scoring detection does not work in necessary scenes. Function can be realized.

(Embodiment 3)
Next, a third embodiment of the present invention will be described with reference to the drawings. FIG. 3 shows a block diagram of an induction heating cooker according to the third embodiment of the present invention. The description of the same parts as those in the first embodiment will be omitted, and only the differences will be described.

  In FIG. 3, the difference from the first embodiment is that it includes an integrated power measuring unit 8 that measures integrated power, and the burn detection unit 6 outputs burn information after reaching a predetermined integrated power value. This is the point.

  With the above configuration, the cooking mode can be specified accurately by measuring the integrated power instead of measuring time, and the burn detection function works in unnecessary scenes, or burn detection is detected in necessary scenes. It is possible to realize a scoring detection function that does not work.

(Embodiment 4)
Next, a fourth embodiment of the present invention will be described with reference to the drawings. FIG. 4 shows a block diagram of an induction heating cooker in the fourth embodiment of the present invention. The description of the same parts as those in the first embodiment will be omitted, and only the differences will be described.

  In FIG. 4, the difference from the first embodiment is that an output setting unit 9 that selects one heating output from a plurality of heating output setting values is provided, and the heating output setting value set by the output setting unit 9 is Outside the predetermined range (for example, 1000 W or more), the scoring detection unit 6 is configured not to output scoring information.

  With the above-described configuration, no scoring detection is performed at a high heating output setting value often used when cooking fried foods, and after cooking at a high heating output setting value at the beginning in boiled cooking, a low heating output setting value is set. Even when changed to, the burn-in detection function can be used accurately.

(Embodiment 5)
Next, a fifth embodiment of the present invention will be described. Description of the same parts as those in the first embodiment will be omitted, and only differences will be described.

  The difference from the first embodiment is that the control unit 7 is configured to stop the heating operation or reduce the output of the inverter circuit 4 when the burnt detection unit 6 outputs burnt information.

  With the configuration as described above, it becomes possible to prevent the cooked food from scorching on the bottom of the cooking container 1.

(Embodiment 6)
Next, a sixth embodiment of the present invention will be described with reference to the drawings.

  FIG. 5 shows a block diagram of an induction heating cooking appliance in the sixth embodiment of the present invention. The description of the same parts as those in the first embodiment will be omitted, and only the differences will be described.

  In FIG. 5, the difference from the first embodiment is that a notification unit 10 is provided, and the notification unit 10 is configured to notify the fact when the burnt detection unit 6 outputs burnt information.

  With the configuration as described above, it is possible to notify the user of burnt information, and it is possible to continue cooking without being burnt when the user responds.

(Embodiment 7)
Next, a seventh embodiment of the present invention will be described with reference to the drawings.

FIG. 6 is a block diagram of an induction heating cooker according to the seventh embodiment of the present invention.

The description of the same parts as those in the first embodiment will be omitted, and only the differences will be described.

  In FIG. 6, an infrared sensor 11 that is provided below the top plate 2 and detects infrared rays emitted from the bottom surface of the cooking container 1 is provided, and the burnt detection unit 6 detects the temperature of the cooking container 1 detected by the thermal element 5. When the temperature reaches one predetermined temperature (for example, 270 ° C.), burn information is output, and the temperature of the cooking container 1 detected by the infrared sensor 11 is lower than the first predetermined temperature (for example, 270 ° C.). ), The fact that the cooked food is burned on the bottom of the cooking container 1 is detected and burnt information is output.

  The operation and action of the induction heating cooker configured as described above will be described below.

  FIG. 7 (a) is a diagram showing that the cooking container is improperly placed when viewed from above the induction heating cooker in the seventh embodiment of the present invention, and FIG. 7 (b) is a book. It is a figure showing that the cooking container at the time of seeing from the side of the induction heating cooking appliance in 7th Embodiment of invention is mounted improperly. FIG. 8 is a diagram for explaining the operation of the scorch detection unit of the induction heating cooker according to the seventh embodiment of the present invention.

  When the end of the cooking container 1 is placed at the position of the thermal element 5 as shown in FIG. 7, the detected temperature of the thermal element 5 is compared with the detected temperature of the infrared sensor 11 as shown in FIG. Get higher. When the detected temperature of the thermal element 5 reaches a first predetermined temperature (for example, 270 ° C.), the detected temperature of the infrared sensor 11 does not become equal to or higher than the temperature when the first predetermined temperature (for example, 270 ° C.) is reached. The detected temperature does not reach the second predetermined temperature (for example, 240 ° C.).

  When the detected temperature of the thermal element 5 reaches the first predetermined temperature (for example, 270 ° C.), the control unit 7 maintains the detected temperature of the thermal element 5 within a predetermined temperature range (for example, 260 ° C. to 270 ° C.). When the detected temperature of the thermal element 5 is maintained within a predetermined temperature range (for example, 260 ° C. to 270 ° C.), the burn detection unit 6 outputs information that the cooked food has burned to the bottom of the cooking container 1. . Moreover, when the detection temperature of the thermal element 5 is not maintained within a predetermined temperature range (for example, 260 ° C. to 270 ° C.) by the control unit 7, the temperature of the cooking container detected by the infrared sensor is higher than the first predetermined temperature. When the second predetermined temperature lower is reached, it is detected that the cooked food has burned to the bottom of the cooking container and burnt information is output.

  With the configuration as described above, even when the cooking container 1 is improperly placed, the burn detection function does not work in an unnecessary scene, or the burn detection does not work in a necessary scene, and the burn detection function does not work. Can be used.

  When the cooking container 1 is correctly placed, the detection temperature of the infrared sensor 11 is higher than the detection temperature of the thermal element 5.

  In that case, when the detection temperature of the infrared sensor 11 reaches the second predetermined temperature (for example, 240 ° C.), the detection temperature of the infrared sensor 11 is maintained within a predetermined temperature range (for example, 230 ° C. to 240 ° C.) by the control unit 7. .

  When the detection temperature of the infrared sensor 11 is maintained within a predetermined temperature range (for example, 230 ° C. to 240 ° C.), the burn detection unit 6 outputs information that the cooked food has burned to the bottom of the cooking container 1. .

  With the configuration as described above, even when the cooking container 1 is correctly placed, the burn-in detection function does not work in unnecessary scenes, or the burn-in detection function does not work in necessary scenes, and the burn-in detection function is used. It becomes possible to do.

  As described above, the induction heating cooker according to the present invention has a burn-in detection function in an unnecessary scene even when the cooking container 1 is improperly placed, or does not perform a burn-in detection in a necessary scene. In other words, the scoring detection function can be used, which is useful for induction heating cookers that require a highly accurate scoring detection function.

DESCRIPTION OF SYMBOLS 1 Cooking container 2 Top plate 3 Heating coil 4 Inverter circuit 5 Thermal element 6 Burning detection part 7 Control part 8 Integrated electric power measurement part 9 Output setting part 10 Notification part 11 Infrared sensor

Claims (7)

A top plate for placing the cooking vessel, a heating coil provided below the top plate for induction heating the cooking vessel, an inverter circuit for supplying a high frequency current to the heating coil, and a lower surface of the top plate When the temperature of the cooking container detects the temperature of the cooking container via the top plate and the temperature of the cooking container detected by the thermal element reaches a first predetermined temperature, the cooked food is burned on the bottom of the cooking container. A burn-out detection unit for detecting burn-in and outputting burn-in information, and the inverter so that the detection temperature of the thermal element is within a predetermined temperature range when the detection temperature of the thermal element exceeds the first predetermined temperature. An induction heating cooker that outputs burn information when the detected temperature of the thermal element is maintained within the predetermined temperature range. The induction heating cooker according to claim 1, wherein the burn-in detection unit outputs burn-in information after a predetermined time has elapsed after the detected temperature of the thermal element reaches the first predetermined temperature. The induction heating cooker according to claim 1, further comprising an integrated power measuring unit that measures integrated power, wherein the burnt detection unit outputs burnt information after reaching a predetermined integrated power value. An output setting unit that selects one heating output from a plurality of heating output set values is provided, and the burn detection unit does not output burn information when the heating output set value set by the output setting unit is outside a predetermined range. The induction heating cooking appliance of any one of Claims 1-3. The induction heating cooker according to any one of claims 1 to 4, wherein when the burn detection unit outputs burn information, the control unit stops the heating operation or reduces the output of the inverter circuit. The induction heating cooker according to any one of claims 1 to 5, further comprising a notification unit, wherein the notification unit notifies that when the burn detection unit outputs burn information. An infrared sensor is provided below the top plate and detects infrared rays emitted from the bottom surface of the cooking container, and the burnt detection unit displays burnt information when the temperature of the cooking container detected by the thermal element reaches a first predetermined temperature. When the temperature of the cooking container detected by the infrared sensor reaches a second predetermined temperature lower than the first predetermined temperature, it detects that the cooked food has burned to the bottom of the cooking container and outputs burnt information. The induction heating cooker according to any one of claims 1 to 6.

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