JP2012089391A - Induction heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance usability by recognizing that a menu selected by a user is a function having a power saving effect.SOLUTION: An operation display unit 4 has a menu selection unit 42b which selects an infrared sensor operation mode for controlling the output from an inverter circuit 7 based on the output from an infrared sensor 3, or an infrared sensor non-operation mode not based on the output from the infrared sensor 3, and a selection display unit 43a which displays a selected content. During the heating in the infrared sensor operation mode, a light source 52 of a power saving display light-emitting circuit performs light-emitting display of a power saving display light-emitting display unit 51.

Description

  The present invention relates to an induction heating cooker that heats an object to be heated such as a cooking container.

  Conventionally, this type of induction heating cooker has an infrared sensor that detects infrared light emitted from a cooking container and transmitted through a top plate, and a control unit controls the output of the inverter based on the output value of the infrared sensor. By controlling the temperature of the cooking vessel to a predetermined temperature, there is a device that can automatically reduce the temperature of the cooking vessel in a short time with a small amount of overshoot and the optimum temperature with the optimum amount of consumed electric power (for example, , See Patent Document 1).

  FIG. 13 is a block diagram showing a partial cross-sectional configuration and a circuit configuration of a conventional induction heating cooker disclosed in Patent Document 1. As shown in FIG.

  As shown in FIG. 13, a top plate 91 made of a material that transmits infrared light, a heating coil 93 that induction-heats a cooking vessel 92 placed on the top plate 91, and a high-frequency current is supplied to the heating coil 93. Based on the output value of the infrared sensor 96, an infrared sensor 96 that has an inverter 94 for performing heating, an operation display unit 95 for performing heating setting, detects infrared radiation emitted from the cooking vessel 92 and transmitted through the top plate 91. The control unit 97 controls the output of the inverter 94 to control the temperature of the cooking vessel 92 to a predetermined temperature.

JP 2010-123366 A

  However, in the conventional configuration, the user can understand that the temperature of the cooking container can be automatically set to the appropriate temperature. However, in recent years, the user's interest in energy saving is increasing. There is no means to inform the user, and even if the user wants to use the function that has a power saving effect, it does not know whether it has a power saving effect. Similarly, in order to quickly raise the temperature of the cooking container manually, heat it by the maximum heating of the equipment, do not know whether the cooking container has reached the appropriate temperature, perform extra heating, and cook using wasted accumulated power Therefore, there were problems in terms of usability and environmental contribution through energy saving.

  The present invention solves the above-described problem, and allows the user to recognize that the selected menu is a function having a power saving effect, and the user gives priority to using a function having a power saving effect. It is an object of the present invention to provide an induction heating cooker that can improve the usability, improve the usability, and promote environmental contribution by energy saving.

In order to solve the above-described conventional problems, an induction heating cooker according to the present invention is placed on the top plate by being supplied with a top plate formed of a material that transmits infrared rays and a high-frequency current. A heating coil for induction heating the cooking vessel, an inverter circuit for supplying a high frequency current to the heating coil, an operation display unit having a light emitting means for setting and displaying an operation mode of the inverter circuit, and a bottom surface of the cooking vessel An infrared sensor that detects infrared rays emitted from the top plate, a control unit that controls the output of the inverter circuit based on the output of the infrared sensor, and a range of a heating circle projected directly on the heating coil The cumulative power consumed by the heating control is manually heated or heated by a temperature detection thermistor other than the infrared sensor. A power-saving display unit that performs display when it is less than the control, and the operation display unit controls an output of the inverter circuit based on an output of the infrared sensor and an output of the infrared sensor A selection unit for selecting an infrared sensor non-operation mode that is not based on and a selection display unit for displaying the selected content, and the light-emitting display of the power-saving display unit by the light emitting means during heating in the infrared sensor operation mode I do.

  Thus, the user can recognize that the selected menu is a function having a power saving effect.

  In the induction heating cooker of the present invention, the user can recognize that the selected menu has a power saving effect, and prompt the user to prioritize the use of the power saving function. In addition, the usability can be improved and the environmental contribution by power saving can be promoted.

The block diagram which shows the partial cross section structure and circuit structure of the induction heating cooking appliance of embodiment Sectional view of the power-saving display unit of the embodiment The top view of the top plate of the 1st Embodiment of this invention The figure which shows the example of a display of the display part before the (initial) menu selection of the 1st Embodiment of this invention (a) The figure which shows the example of a display of the display part which is selecting the infrared sensor operation mode ("baked goods" mode) (B) The figure which shows the example of a display of the display part during heating in infrared sensor operation mode ("baked goods" mode) (c) The figure which shows the example of display of the display part of completion of preheating in infrared sensor operation mode ("baked goods" mode) The figure which shows the example of a display of the display part before the (initial) menu selection of the 1st Embodiment of this invention (a) The example of a display of the display part which is selecting the infrared sensor non-operation mode ("heating" mode) is shown FIG. 5B is a diagram showing a display example of the display unit during heating in the infrared sensor non-operation mode (“heating” mode). Circuit diagram of infrared sensor of embodiment The graph which shows the integrated electric energy consumed by heating when a hot cake is continuously baked three times at a target temperature of 150 degrees when using manual heating and using an infrared sensor The graph which shows the integrated electric energy consumed when 200g of oil when the temperature detection thermistor is used and when the infrared sensor is used is heated and controlled at a target temperature of 180 degrees fried food The top view of the top plate of the 2nd Embodiment of this invention The figure which shows the example of a display of the display part before the (initial) menu selection of the 2nd Embodiment of this invention (a) The figure which shows the example of a display of the display part which is selecting the infrared sensor operation mode ("baked goods" mode) (B) The figure which shows the example of a display of the display part during heating in infrared sensor operation mode ("baked goods" mode) (c) The figure which shows the example of display of the display part of completion of preheating in infrared sensor operation mode ("baked goods" mode) The top view of the top plate of the 3rd Embodiment of this invention The figure which shows the example of a display of the display part before the (initial) menu selection of the 3rd Embodiment of this invention (a) The figure which shows the example of a display of the display part which is selecting the infrared sensor operation mode ("baked goods" mode) (B) The figure which shows the example of a display of the display part during heating in infrared sensor operation mode ("baked goods" mode) (c) The figure which shows the example of display of the display part of completion of preheating in infrared sensor operation mode ("baked goods" mode) The block diagram which shows the partial cross-section structure and circuit structure of the conventional induction heating cooking appliance described in patent document 1

  According to a first aspect of the present invention, there is provided a top plate formed of a material that transmits infrared rays, a heating coil that induction-heats a cooking vessel placed on the top plate by being supplied with a high-frequency current, and the heating coil An inverter circuit that supplies a high-frequency current to the operation circuit, an operation display unit having a light emitting means for setting and displaying an operation mode of the inverter circuit, and infrared rays that are emitted from the bottom surface of the cooking container and transmitted through the top plate are detected. An infrared sensor that controls the output of the inverter circuit based on the output of the infrared sensor, and an integrated electric energy that is disposed outside the range of the heating circle projected directly above the heating coil and consumed by the heating control Power saving table that displays when the temperature is less than manual heating or heating control by temperature detection thermistors other than infrared sensors The operation display unit for selecting an infrared sensor operation mode for controlling an output of the inverter circuit based on an output of the infrared sensor and an infrared sensor non-operation mode not based on the output of the infrared sensor. It has a selection section and a selection display section for displaying the selected contents, and the light-emitting display of the power saving display section is performed by the light emitting means during heating in the infrared sensor operation mode. Accordingly, the user can recognize that the selected mode is a function having a power saving effect, and can prompt the user to preferentially use the function having a power saving effect. In addition, even if the pan is placed on the heating part for cooking, the power saving display part is arranged outside the range of the heating circle projected directly above the heating coil, so that the power saving display part is not hidden, Visibility and usability can be improved, and contribution to the environment through power saving can be promoted.

  In the second invention, in particular, in the first invention, when the infrared sensor operation mode before heating is selected, light emission display of the power saving display unit is performed. This allows the user to recognize that the mode selected by the user has a power saving effect before starting cooking in the mode selected by the user, and the user gives priority to the function having a power saving effect. It is possible to encourage use, improve usability, and promote environmental contribution through power saving.

  In a third aspect of the invention, in particular, in the first aspect of the invention, the power saving display unit is configured by a light emission display unit using light emission means and a print display unit not using light emission means. As a result, even if the power saving display unit does not emit light, the user can recognize that the device being used has a power saving effect by checking the print display unit, and the power saving display unit When the light-emitting display unit emits light, the user can recognize that the selected mode is a function that has a power-saving effect, and can encourage the user to prioritize the function that has a power-saving effect. In addition to improving usability, it is possible to promote environmental contribution through power saving.

  According to a fourth aspect of the present invention, in the first aspect of the invention, the color emitted by the light emitting means of the power saving display unit is different from the other colors. Thus, even if the selection mode light emission display or the status display light emission display emits light, the light emission color by the light emission means of the power saving display unit is different from other light emission colors, so the user has selected at a glance. Recognize that the mode is a function that has a power-saving effect, encourage users to prioritize the use of a function that has a power-saving effect, improve usability, and reduce power consumption. You can promote your contribution.

  According to a fifth aspect of the invention, in particular, in the first aspect of the invention, the light-emitting means of the power saving display unit includes a light-emitting circuit unit that emits light and a light guide provided above the light-emitting circuit unit. A convex shape is formed on a part or the whole. Thereby, the light emission of the power saving display unit is refracted by the convex shape formed on a part or the whole of the light guide, and the light emission of the power saving display unit is more easily recognized by the user. Since the light emission and status display light emission are different, the user can recognize at a glance that the selected mode is a function that has a power-saving effect, and the user should prioritize the function that has a power-saving effect. It can be promoted, the usability can be improved, and the environmental contribution by power saving can be promoted.

According to a sixth aspect of the invention, particularly in the first aspect of the invention, the power saving display portion is arranged at the front portion of the product on the top plate. As a result, even if the pan is placed on the heating part for cooking, the power saving display part is located in the front of the top plate, so that the power saving display part is not hidden and displayed on the top plate. As a result, it is easy for the user to see from the standing position, can recognize that the selected mode is a function that has a power saving effect, can encourage the user to prioritize the function that has a power saving effect, Usability can be improved, and environmental contribution by power saving can be promoted.

  In a seventh aspect of the invention, particularly in the first aspect of the invention, in the induction heating cooker in which a plurality of heating coils for induction heating the placed cooking vessel are arranged, the position of each heating coil is arranged at the front portion of the top plate. A power saving display unit is provided. As a result, the user can recognize whether or not the currently used heating unit uses a function that has a power saving effect, and can improve the usability and promote environmental contribution through power saving. be able to.

  In an eighth aspect of the present invention, particularly in the first aspect, in the induction heating cooker in which a plurality of heating coils for induction heating the placed cooking container are arranged, the heating coils in front of the heating coils of the top plate, respectively. Are provided with the same number of power saving display units. As a result, the user can recognize whether or not the heating unit currently in use uses a function that has a power saving effect, with each heating unit as a pair, and the visibility can be further improved. In addition to improving the performance, it is possible to promote environmental contribution through power saving.

  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 showing a partial cross-sectional configuration and a circuit configuration of the induction heating cooker according to the first embodiment of the present invention. This induction heating cooker is used by being incorporated in a cabinet such as a kitchen, for example. An induction heating cooker according to an embodiment of the present invention includes a top plate 1 provided on an upper surface of a device, and a heating coil 2 (outside) that induction-heats an object to be heated 10 on the top plate 1 by generating a high-frequency magnetic field. A coil 2a and an inner coil 2b). The top plate 1 is made of an electrically insulating material such as a substantially transparent ceramic that transmits light, and transmits infrared light. The heating coil 2 is provided below the top plate 1. The heating coil 2 is divided into two concentric circles to form an outer coil 2a and an inner coil 2b. A gap is provided between the outer coil 2a and the inner coil 2b. The object to be heated 10 generates heat due to the eddy current generated by the high frequency magnetic field of the heating coil 2.

  On the user side of the top plate 1, an operation display unit 4 is provided for the user to instruct the start / stop of heating. An operation display light emitting circuit unit light source 41 for irradiating the operation display unit 4 is provided below the operation display unit 4. The operation display light emission circuit unit light source 41 has a red or white emission color.

  The infrared sensor 3 is provided below the gap between the outer coil 2a and the inner coil 2b. Since the high-frequency magnetic field of the heating coil 2 is strong at this position, the substantially maximum temperature of the bottom surface of the object to be heated 10 can be detected. Infrared radiation based on the bottom surface temperature of the object to be heated 10 radiated from the bottom surface of the object to be heated 10 is incident through the top plate 1, passes through a gap between the outer coil 2 a and the inner coil 2 b, and is an infrared sensor. 3 is received. The infrared sensor 3 detects received infrared rays and outputs an infrared detection signal 35 based on the detected amount of infrared rays.

Below the heating coil 2, a rectifying / smoothing unit 6 that converts an AC voltage supplied from the commercial power supply 12 into a DC voltage, a DC voltage supplied from the rectifying / smoothing unit 6 to generate a high-frequency current, and the generated high-frequency current Is provided to the heating coil 2. An input current detection unit 9 for detecting an input current flowing from the commercial power supply 12 to the rectifying / smoothing unit 6 is provided between the commercial power source 12 and the rectifying / smoothing unit 6.

  The rectifying / smoothing unit 6 includes a full-wave rectifier 61 composed of a bridge diode, and a low-pass filter composed of a choke coil 62 and a smoothing capacitor 63 connected between output terminals of the full-wave rectifier 61. The inverter circuit 7 has a switching element 73 (IGBT in the present embodiment), a diode 72 connected in antiparallel with the switching element 73, and a resonant capacitor 71 connected in parallel with the heating coil 2. When the switching element 73 of the inverter circuit 7 is turned on / off, a high frequency current is generated. The inverter circuit 7 and the heating coil 2 constitute a high frequency inverter.

  The induction heating cooker of the present embodiment further includes a control unit 8 that controls the high-frequency current supplied from the inverter circuit 7 to the heating coil 2 by controlling on / off of the switching element 73 of the inverter circuit 7. Have. The control unit 8 controls on / off of the switching element 73 based on the signal transmitted from the operation display unit 4 and the temperature detected by the infrared sensor 3.

  The control unit 8 includes an input power integration unit 81 that integrates input power. The input power integration unit 81 integrates the input power based on the input current detected by the input current detection unit 9. For example, the input power integration unit 81 calculates an integrated value of input power after starting preheating.

  In addition, the induction heating cooker of the present embodiment further includes a notification unit 13. The notification unit 13 is, for example, a speaker that outputs an electronic sound. Specifically, when the preheating is completed, the notification unit 13 outputs an electronic sound notifying that the preheating has been completed.

  The induction heating cooker according to the present embodiment further includes a power saving display unit 5. The power saving display unit 5 performs display when the integrated power consumed by the heating control is less than manual heating or heating control by a temperature detection thermistor other than the infrared sensor 3.

  FIG. 2 is a cross-sectional view of the power saving display unit. The power saving display unit 5 includes a power saving display light emitting display unit 51, and a power saving display light emitting circuit unit light source for irradiating the power saving display light emitting display unit 51 below the power saving display light emitting display unit 51. 52 is provided. Further, a light guide 53 is disposed above the light-saving display light emitting circuit unit light source 52, and the light guide 53 is formed of a substantially transparent polycarbonate having a convex shape on the upper surface. The power-saving display light-emitting circuit unit light source 52 uses a green light emission color that is different from other light emission display colors and that gives energy and ecology. Light emission from the power-saving display light-emitting circuit unit light source 52 is refracted by the convex shape formed on the light guide 53 so that light can be seen from various angles, and the user can recognize the light emission from the power-saving display unit. It becomes easy.

  FIG. 3 shows a top view of the top plate 1. On the upper surface or the lower surface of the top plate 1, at least one (two in the present embodiment) heating circle 11 indicating the place where the object to be heated 10 is placed is printed at a position projected directly above the heating coil. It is displayed. The heating coils 2 are respectively disposed below the heating circle 11. An operation display unit 4 and a power saving display unit 5 are provided on the front side (user side) of the heating circle 11.

The operation display unit 4 includes a menu selection unit 42b for selecting an operation mode, setting units 42c and 42d for setting a target temperature such as the magnitude of the output of the heating coil 2 and a baking product, and heating for starting and stopping heating control. An operation unit 42 having a control cut-in setting unit 42a, a selection display unit 43a for displaying the selected content, and characters for the user to identify the output temperature of the heating coil 2 and the set temperature such as the baking are displayed. The display unit 43 includes a setting state display unit 43b. Here, the operation mode is a mode in which the operation of the inverter circuit 7 is set to be suitable for “heating”, “baked goods”, and “fried food”. The “baked goods” and “fried food” modes are the modes of the infrared sensor 3. This is an infrared sensor operation mode that controls the output of the inverter circuit based on the output, and the “heating” mode is an infrared sensor non-operation mode that is not based on the output of the infrared sensor 3.

  The power saving display section 5 is a power saving display light emitting display section 51 of the light emitting means and the power saving display light emitting display section 51 by the light source 52 and “ECO” indicating that the power saving display is on the upper surface or the lower surface of the top plate 1 not using the light emitting means. The power-saving print display unit 54 is printed. The power saving display light emitting display unit 51 is provided in the vicinity of the power saving print display unit 54 and is easily visible to the user when the power saving display light emitting display unit 51 performs light emission display.

  Further, a display unit 43 is provided between the operation unit 42 of the operation display unit 4 and the heating circle 11.

  The power saving display unit 5 is provided between the operation unit 42 and the heating circle 11 at a substantially central front portion of the top plate 1.

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

  The operation display unit 4 includes heating control cut-in setting units 42a to 42d for a plurality of capacitance type switches. The heating control cut-in setting unit 42 a to the setting unit 42 d of the switch are switches for inputting instructions related to cooking, and are provided corresponding to the number of heating circles 11.

  Specific functions are respectively assigned to the heating control cut-in setting units 42a to 42d of the respective switches. For example, the heating control cut-in setting unit 42a of the switch is a heat control cut-in setting unit 42a that is a turn / on switch to which a function for controlling the start and end of cooking is assigned.

  The menu selection unit 42b of the switch is a menu selection unit 42b that is a menu switch to which a function for switching to an operation mode suitable for cooking menus of “heating”, “baked goods”, and “fried food” is assigned. By pressing the menu selection part 42b of the menu switch, the selection display part 43a blinks in the order of “heating”, “baked goods”, and “fried food”, and the operation mode selection and display are switched. At this time, “baked food” and “fried food” which are infrared sensor operation modes for controlling the output of the inverter circuit based on the output of the infrared sensor are selected and displayed, and at the same time, the power saving display light emitting display section 51 of the power saving display section 5. However, the integrated power consumed by the power-saving display light-emitting circuit unit light source 52 of the light-emitting means and the current selection menu consumed by the heating control is less than that of manual heating or heating control by a temperature detection thermistor other than the infrared sensor 3. The user is made to be in the infrared sensor operation mode for controlling the output of the inverter circuit 7 based on the output of the infrared sensor 3. When “heating”, which is an infrared sensor inoperative mode that is not based on the output of the infrared sensor 3, is selected and displayed, the power-saving display and the light-emitting display section 51 of the power-saving display section 5 do not emit light and the current selection menu is the infrared sensor. It is a non-operation mode and the user is made to be a mode that does not contribute to power saving.

When the operation mode of “heating”, “baked goods”, or “fried food” is selected, if the heating control cut-in setting unit 42a of the cut / on switch is operated, the selected operation mode is determined and determined. The display corresponding to the selected operation mode is turned on, and the display corresponding to the operation mode that has not been determined is turned off. When “baked goods” and “fried food” are selected and determined, the power saving display light emitting display section 51 of the power saving display section 5 continues to be projected by the power saving display light emitting circuit section light source 52 of the light emitting means, An infrared sensor that controls the output of the inverter circuit 7 based on the output of the infrared sensor 3 in which the integrated power consumed by the heating control in the current use mode is less than that of manual heating or heating control by a temperature detection thermistor other than the infrared sensor 3 Let the user be in operation mode.

  The switch setting unit 42c is a thermal power setting switch to which a function for increasing the thermal power is assigned. The switch setting unit 42d is a thermal power setting switch to which a function for reducing the thermal power is assigned, and is the setting units 42c and 42d. When the “heating” mode is set, it is possible to set the thermal power by the setting units 42c and 42d of the thermal power setting switch. When the setting unit 42c is pressed, the numerical value of the thermal power display increases. When the setting part 42d is pushed, the number of the thermal power display becomes small. When the “baked goods” and “fried food” modes are set, the target temperature can be set by the setting units 42c and 42d of the heating power setting switch, and the setting state display unit 43b displays the target temperature when the setting unit 42c is pressed. When the setting unit 42d is pressed, the target temperature display number decreases.

  When the control unit 8 detects that the heating control cut-in setting unit 42a to the setting unit 42d of the switch is pressed, the control unit 8 controls the inverter circuit 7 based on the pressed switch and supplies the heating coil 2 with the high-frequency current. To control.

  4A to 4C show examples of display on the display unit. Specifically, FIGS. 4A to 4C show examples when the “baked goods” mode is selected and determined by the operation of the right heating unit. When the menu selection unit 42b of the menu switch is operated and the “baked goods” mode is selected, the letters and numbers of “baked goods” and “target temperature“ 230 ”” blink, and the power saving display unit 5 saves power. The power display light emitting display section 51 is projected by the power saving display light emitting circuit section light source 52 of the light emitting means. (FIG. 4A). In this state, when the heating control cut-in setting part 42a of the cut / on switch is operated, the “baked goods” mode is determined and preheating is started. At this time, the letters “baked goods” are lit, and the letters “target temperature“ 230 ”” blink. Then, the power saving display light emitting display section 51 of the power saving display section 5 continues to be projected by the power saving display light emitting circuit section light source 52 of the light emitting means (FIG. 4B). When the preheating is completed, an electronic sound for notifying completion of the preheating is output from the notification unit 13 and the character “target temperature“ 230 ”” is turned on. At this time as well, the power saving display light emitting display section 51 of the power saving display section 5 is continuously projected by the power saving display light emitting circuit section light source 52 of the light emitting means. (FIG. 4 (c)).

  FIGS. 5A and 5B show examples of display on the display unit. Specifically, FIGS. 5A to 5B show examples when the “heating” mode is selected and determined by operating the right heating unit. When the menu selection unit 42b of the menu switch is operated and the "heating" mode is selected, the characters and numbers of "heating" blink, and the power saving display light emitting display unit 51 of the power saving display unit 5 The power saving display light emitting circuit unit light source 52 of the light emitting means does not emit light and does not light up. (FIG. 5 (a)). In this state, when the heating control on / off setting part 42a of the on / off switch is operated, the “heating” mode is determined and heating is started. At this time, the characters “Heating” are lit, and the characters “Heating” “5” to “5” in the setting state display unit 43b are lit.

  FIG. 6 shows a circuit diagram of the infrared sensor 3. The infrared sensor 3 includes a photodiode 31, an operational amplifier 32, and resistors 33 and 34. One end of each of the resistors 33 and 34 is connected to the photodiode 31, and the other end is connected to the output terminal and the inverting output terminal of the operational amplifier 32. The photodiode 31 is a light receiving element formed of silicon or the like through which a current flows when irradiated with infrared light having a wavelength of about 3 microns or less that passes through the top plate 1. The current generated by the photodiode 31 is amplified by the operational amplifier 32 and is output to the control unit 8 as an infrared detection signal 35 (corresponding to the voltage value V) indicating the temperature of the object to be heated 10. The infrared sensor 3 receives infrared rays emitted from the object to be heated 10, and therefore has better thermal response than a thermistor that detects the temperature via the top plate 1.

  FIG. 7 shows the heating when three pancakes are continuously baked by heating the frying pan in the “heating” mode not using the infrared sensor 3 and the “baked goods” mode that is infrared sensor controlled heating using the infrared sensor 3. It is a graph which shows the integrated electric energy consumed by. The same frying pan was used for both heating, and three pieces of hot cake dough were prepared by making the same amount of dough with 150 g of hot cake mix, one egg and 100 cc of milk. As a guideline, turn the table about 3 minutes in the hot cake mix, turn it over for about 3 minutes, take about 30 seconds to remove the hot cake and put it in a frying pan, preheat time about 1.5-2 minutes If it thinks, cooking time is about 21 minutes and it turns out that it is a result of having performed appropriate cooking.

  Graph 1 shows the result of heating a frying pan with a constant heating output using “heating”, which is an infrared sensor non-operation mode that is not based on the output of the infrared sensor, and then making three consecutive hot cakes. It is. Of course, in this “heating”, the power-saving display light-emitting display unit 51 of the power-saving display unit 5 is not projected and is not turned on by the power-saving display light-emitting circuit unit light source 52 of the light-emitting means. As a result, the integrated power consumption consumed by the end of cooking was 215 Wh.

  Graph 2 shows that the frying pan is heated at the target temperature “150”, which is an infrared sensor operation mode for controlling the output of the inverter circuit based on the output of the infrared sensor, and the hot cakes are continuously performed three times at a time. It is the result when making it. Of course, in this “baked goods”, the power saving display light emitting display section 51 of the power saving display section 5 is projected by the power saving display light emitting circuit section light source 52 of the light emitting means. As a result, the accumulated electric power consumed by the end of cooking was 194 Wh.

  From this result, it can be seen that the integrated electric energy consumed by the infrared sensor heating control “baked goods” in the infrared sensor operation mode is smaller than the integrated electric energy consumed by manual “heating” in the infrared sensor non-operation mode.

  FIG. 8 shows a case where a temperature detection thermistor that does not use the infrared sensor 3 is used, and in the “fried food” mode that is infrared sensor-controlled heating using the infrared sensor 3, when 200 g of oil is controlled to be heated to a target temperature of 180 degrees. It is the graph 3 which shows the temperature of oil, and a heating input. Both heating uses the same tempura pot, and the oil is salad oil. Of course, in the “fried food” mode using the infrared sensor 3, the power saving display light emitting display section 51 of the power saving display section 5 is projected by the power saving display light emitting circuit section light source 52 of the light emitting means. As a result, the accumulated electric energy consumed until reaching the oil temperature of 180 degrees in the “fried food” mode using the infrared sensor 3 was 53.4 Wh. The integrated electric energy consumed by the temperature detection thermistor without using the infrared sensor 3 until reaching the oil temperature of 180 degrees was 65.4 Wh. This is because the infrared sensor 3 can directly detect the temperature at the bottom of the pan and detect a temperature close to the temperature of the oil, so that a high input can be performed from the beginning, whereas in the control using the temperature detection thermistor, Since the temperature at the bottom of the pan is detected by heat conduction through the top plate 1, it deviates from the temperature of the oil. Therefore, it is necessary to squeeze the heating input to compensate for the temperature difference between the bottom of the pan and the oil. The length of the sensor 3 is longer than that of the sensor 3, and the heat radiation of the pot and oil increases accordingly, so that heating to supplement the heat radiation is required, resulting in a large amount of power consumption.

  From this result, it can be seen that the integrated electric energy consumed by the infrared sensor heating control “fried food” in the infrared sensor operation mode is smaller than the integrated electric energy consumed by the temperature detection thermistor not using the infrared sensor 3.

As described above, in the present embodiment, since the temperature of the object to be heated 10 is detected by the infrared sensor 3 having good thermal responsiveness, the actual temperature of the object to be heated 10 can be accurately detected. The integrated electric energy consumed by the heating control in the infrared sensor operation mode can be made smaller than the integrated electric energy consumed by the manual heating or the heating control by the temperature detection thermistor other than the infrared sensor.

  Further, the infrared sensor 3 is provided in the radial direction of the winding of the heating coil 2, that is, between the outer coil 2a and the inner coil 2b. The bottom surface portion of the object to be heated 10 located at the upper part between the windings with the coil 2b is measured. Thereby, the high temperature close | similar to the highest temperature of the to-be-heated material 10 is measurable. Thereby, since the power supply to the heating coil 2 can be controlled in a state in which the detection sensitivity for the high-temperature portion of the article to be heated 10 is higher, overheating can be prevented.

  And when heating in the infrared sensor operation mode, the user can recognize that the selected mode is a function that has power-saving effect by using the light-emitting means to perform light-emitting display of the power-saving display unit, and use It is possible to encourage the user to prioritize the use of functions that have a power saving effect.

  In addition, even if the pan is placed on the heating part for cooking, the power saving display part is arranged outside the range of the heating circle projected directly above the heating coil, so that the power saving display part is not hidden, Visibility and usability can be improved, and contribution to the environment through power saving can be promoted.

  In addition, the function selected by the user has a power-saving effect before heating cooking is started in the mode selected by the user by performing light emission display of the power-saving display unit when selecting the infrared sensor operation mode before heating Therefore, the user can be encouraged to prioritize the use of a function that has a power saving effect, the usability can be improved, and the environmental contribution by the power saving can be promoted.

  In addition, the power-saving display unit is composed of a light-emitting display unit that uses light-emitting means and a print display unit that does not use light-emitting means, so that even if the power-saving display unit does not emit light, the user can confirm the print display unit. When the light emitting display part of the power saving display unit emits light, it can be recognized that the device being used has a function that has a power saving effect, and the mode selected by the user is a function that has a power saving effect. It is possible to recognize the fact that the user can prioritize the use of a function that has a power saving effect, the usability can be improved, and the environmental contribution by the power saving can be promoted.

  Furthermore, the light emission color of the light-emitting means of the power-saving display unit is green, which is different from other emission colors, so even if the selection mode light-emitting display and the status display light-emitting display emit white or red, the power-saving display unit Since the color emitted by the light emitting means is different from other colors, the user can recognize at a glance that the selected mode is a function that has a power saving effect, and the user has a power saving effect. It is possible to promote the use of a certain function with priority, so that the usability can be improved and the environmental contribution by power saving can be promoted.

  The light-emitting means of the power-saving display unit is configured by a light-emitting circuit unit that emits light and a light guide provided above the light-emitting circuit unit, and by forming a convex shape on the light guide, The light emission is refracted by the convex shape of the light guide, making it easier for the user to recognize the light emission of the power saving display section, and the light is different from the light emission of other selection mode light emission display and status display light emission display, so the user can see at a glance However, it can recognize that the selected mode is a function that has a power saving effect, can prompt the user to prioritize the use of the function that has a power saving effect, and can improve usability. It is possible to promote environmental contribution through power saving.

In addition, by placing the power-saving display at the front of the top plate, the product is located at the front of the top plate. The power-saving display unit is not hidden, and the display on the top plate makes it easy for the user to see from the standing position and recognizes that the selected mode has a power-saving effect. It is possible to promote the use of functions that have a power saving effect with priority, so that the usability can be improved and the environmental contribution by power saving can be promoted.

(Embodiment 2)
FIG. 9 is a top view of the induction heating cooker according to the second embodiment of the present invention.

  The difference from the first embodiment is that, in an induction heating cooker in which a plurality of heating coils 2 for induction heating a placed cooking vessel are arranged at two places on the left and right, the position of each heating coil 2 at the front portion of the top plate 1 The power-saving display light-emitting display portions 51 of the power-saving display portion 5 are independently provided at two locations, and the characters “left” and “right” printed on the upper or lower surface of the top plate 1 at the time of light emission are respectively provided. The power saving display light emitting circuit unit light source 52 of the light emitting means is provided with a configuration in which light is projected.

  As a result, “baked food” and “fried food” are selectively displayed on the right heating unit, and at the same time, the power saving display light emitting display unit 51 of the power saving display unit 5 is changed by the power saving display light emitting circuit unit light source 52 of the light emitting means. The “right” character is projected, and the current left menu selection menu consumes less accumulated power than the infrared sensor 3 by manual heating or heating control by a temperature detection thermistor other than the infrared sensor 3. The user is made to be in the infrared sensor operation mode for controlling the output of the inverter circuit 7 based on the output. When “heating” is selected and displayed in the left heating unit, the power saving display light emitting display unit 51 of the power saving display unit 5 does not display the “left” character in light emission, and the current selection menu is the infrared sensor non-operation mode. It is a user that the mode does not contribute to power saving.

  10A to 10C show examples of display on the display unit. Specifically, FIGS. 10A to 10C show examples when the “baked goods” mode is selected and determined by the operation of the right heating unit. When the menu selection unit 42b of the menu switch is operated and the “baked goods” mode is selected, the letters and numbers of “baked goods” and “target temperature“ 230 ”” blink, and the power saving display unit 5 saves power. The character “right” of the power display light emitting display unit 51 is projected by the power saving display light emitting circuit unit light source 52 of the light emitting means. (FIG. 10 (a)). In this state, when the heating control cut-in setting part 42a of the cut / on switch is operated, the “baked goods” mode is determined and preheating is started. At this time, the letters “baked goods” are lit, and the letters “target temperature“ 230 ”” blink. Then, the “right” character of the power saving display light emission display portion 51 of the power saving display portion 5 continues to be projected by the power saving display light emitting circuit portion light source 52 of the light emitting means (FIG. 10B). When the preheating is completed, an electronic sound for notifying completion of the preheating is output from the notification unit 13 and the character “target temperature“ 230 ”” is turned on. Also at this time, the “right” character of the power saving display light emitting display section 51 of the power saving display section 5 continues to be projected by the power saving display light emitting circuit section light source 52 of the light emitting means. (FIG. 10 (c)).

  As described above, in the present embodiment, the power saving display light emitting display portions 51 of the power saving display portion 5 representing the positions of the respective heating coils 2 are independently provided at the front portion of the top plate 1. The letters “left” and “right” printed on the upper or lower surface of the top plate 1 at the time of light emission are projected by the power-saving display light emitting circuit light source 52 of the light emitting means, and are currently used. It can be recognized whether or not the heating unit uses a function having a power saving effect, and the usability can be improved, and the environmental contribution by the power saving can be promoted.

(Embodiment 3)
FIG. 11 is a top view of an induction heating cooker according to the third embodiment of the present invention.
The difference from the first embodiment is that, in an induction heating cooker in which a plurality of heating coils 2 for induction heating the placed cooking vessel are arranged at two places on the left and right, a heating coil is provided in front of each heating coil 2 of the top plate 1. The same number of left and right power-saving display units 5 is provided.

  As a result, “baked food” and “fried food” are selectively displayed on the right heating unit, and at the same time, the right power saving display light emitting display unit 51 of the right power saving display unit 5 displays the power saving display of the right light emitting means. The infrared sensor 3 of the infrared sensor 3 is projected by the light emitting circuit unit light source 52, and the accumulated power consumed by the current right heating unit selection menu is less than that of manual heating or heating control by a temperature detection thermistor other than the infrared sensor 3. The user is made to be in the infrared sensor operation mode for controlling the output of the inverter circuit 7 based on the output. When “heating” is selected and displayed in the left heating section, the left power saving display light emitting display section 51 of the left power saving display section 5 does not display light emission, and the current selection menu is the infrared sensor non-operation mode. The user is made to be in a mode that does not contribute to power saving.

  FIGS. 12A to 12C show examples of display on the display unit. Specifically, FIGS. 12A to 12C show an example when the “baked goods” mode is selected and determined by the operation of the right heating unit. When the menu selection unit 42b of the menu switch is operated and the “baked goods” mode is selected, the letters and numbers of “baked goods” and “target temperature“ 230 ”” blink, and the power saving display unit 5 saves power. The power display light emitting display section 51 is projected by the power saving display light emitting circuit section light source 52 of the light emitting means. (FIG. 12A). In this state, when the heating control cut-in setting part 42a of the cut / on switch is operated, the “baked goods” mode is determined and preheating is started. At this time, the letters “baked goods” are lit, and the letters “target temperature“ 230 ”” blink. Then, the power saving display light emitting display section 51 of the power saving display section 5 continues to be projected by the power saving display light emitting circuit section light source 52 of the light emitting means (FIG. 12B). When the preheating is completed, an electronic sound for notifying completion of the preheating is output from the notification unit 13 and the character “target temperature“ 230 ”” is turned on. At this time as well, the power saving display light emitting display section 51 of the power saving display section 5 is continuously projected by the power saving display light emitting circuit section light source 52 of the light emitting means. (FIG. 12 (c)).

  As described above, in the present embodiment, the heating unit currently used by the user is provided by providing the same number of left and right power saving display units as the heating coil in front of each heating coil of the top plate. Recognizes whether or not it uses a function that has a power-saving effect, and can be recognized as a pair with each heating unit, can further improve visibility, improve usability, and contribute to the environment through power-saving Can be promoted.

  As described above, in the induction heating cooker according to the present invention, the user can recognize that the selected menu is a function having a power saving effect, and the user preferentially uses the function having a power saving effect. Therefore, it can be applied to built-in type, desktop type, and stationary type induction heating cookers.

DESCRIPTION OF SYMBOLS 1 Top plate 2 Heating coil 2a Outer coil 2b Inner coil 3 Infrared sensor 4 Operation display part 5 Power saving display part 6 Rectification smoothing part 7 Inverter circuit 8 Control part 9 Input current detection part 10 To-be-heated object 11 Heating circle 12 Commercial power supply 13 Notification unit 31 Photodiode 32 Operational amplifier 33, 34 Resistance 41 Operation display Light emitting circuit unit Light source 42 Operation unit 42a Heating control cut-in setting unit 42b Menu selection unit 42c, 42d Setting unit 43 Display unit 43a Selection display unit 43b Setting state display unit 51 Saving Power display light emitting display unit 52 Power saving display light emitting circuit unit Light source 53 Light guide body 54 Power saving print display unit 61 Full wave rectifier 62 Choke coil 63 Smoothing capacitor 71 Resonance capacitor 72 Diode 73 Switching element 81 Input power integration unit

Claims (8)

A top plate formed of a material that transmits infrared rays, a heating coil that induction-heats a cooking vessel placed on the top plate by being supplied with a high-frequency current, and a high-frequency current that is supplied to the heating coil An inverter circuit, an operation display unit having a light emitting means for setting and displaying an operation mode of the inverter circuit, an infrared sensor that detects infrared rays emitted from the bottom surface of the cooking vessel and transmitted through the top plate; Based on the output of the infrared sensor, the control unit for controlling the output of the inverter circuit and the heating power projected on the heating coil are arranged outside the range of the heating circle, and the accumulated power consumed by the heating control is determined by manual heating or an infrared sensor. A power-saving display that displays when the temperature is less than the heating control by a temperature sensing thermistor The operation display unit is selected with an infrared sensor operation mode for controlling the output of the inverter circuit based on the output of the infrared sensor, and a selection unit for selecting an infrared sensor non-operation mode not based on the output of the infrared sensor. An induction heating cooker comprising a selection display unit for displaying contents, and performing light emission display of a power saving display unit by a light emitting means during heating in the infrared sensor operation mode. The induction heating cooker according to claim 1, wherein a light-emitting display of the power saving display unit is performed when the infrared sensor operation mode before heating is selected. The induction heating cooker according to claim 1, wherein the power saving display unit is configured by a light emitting display unit using a light emitting unit and a print display unit not using the light emitting unit. The induction heating cooker according to claim 1, wherein a light emission color of the light emission means of the power saving display unit is different from other light emission colors. The light-emitting means of the power-saving display unit is composed of a light-emitting circuit unit that emits light and a light guide provided above the light-emitting circuit unit, and a convex shape is formed on a part or the whole of the light guide. Item 2. An induction heating cooker according to item 1. The induction heating cooker according to claim 1, wherein the power saving display portion is arranged at a substantially central front portion of the product of the top plate. The induction heating cooker in which a plurality of heating coils for induction heating the placed cooking container is provided, and a power-saving display unit that indicates the position of each heating coil is provided at the front of the top plate. Induction heating cooker. In the induction heating cooker in which a plurality of heating coils for induction heating the placed cooking container are provided, the same number of power saving display portions as the heating coils are provided in front of each heating coil of a top plate. The induction heating cooker according to 1.