JP4198074B2 - Cooker - Google Patents

Description

  The present invention relates to a heating cooker including a heat source for heating an object to be cooked and a human body sensor for detecting the presence or absence of a human body.

In a cooking device that heats an object to be cooked such as an electromagnetic cooker to a set temperature, for example, as shown in Patent Document 1, a human body detection unit is provided, and the human body is detected by the detection unit. In some cases, the object to be cooked is heated at the set temperature, and when the human body is no longer detected, the set temperature is lowered to prevent, for example, a fire accident during cooking of fried food as much as possible.
JP-A-2-279925

  However, in the configuration shown in Patent Document 1, when the human body detecting means detects the human body again, the set temperature is automatically set to a high temperature to prevent the influence on cooking. When a malfunction occurs, there is a problem that the set temperature may be restored to the original high temperature even when there is no person near the appliance.

  Further, in the case of the configuration disclosed in Patent Document 1, there is a problem that it is difficult for the user to know whether or not the human body detection means detects the human body.

  Therefore, an object of the present invention is to further improve the safety of a human body sensor that detects the presence or absence of a human body.

The configuration of claim 1 of the present invention includes a cooker main body, a heat source arranged in the cooker main body, operation means for setting the heating power and set temperature of the heat source , input information from the operation means, and the like. comprising a display for displaying and a human body sensor for detecting a human body approaching, and control means for controlling the heat source and display based on the input from the human sensors and operating means or the like, the control means, start cooking When the human body sensor is no longer detected by the human body sensor for a predetermined time or longer, the control means is set so that the heat source and the set temperature of the heat source are set low. sometimes detected a human body again by the human body sensor when you have set, to guide the input by the operation means by voice, so as to return the firepower or the like of the heat source after detecting an input by the operation means by the guide to the original settings Are those made form.

The second aspect of the present invention, in the configuration of claim 1, when the human sensor over a predetermined time after the cooking start is not detected the human body is one formed by construction so as to turn off the display .

According to the configuration of the first aspect of the present invention, when the human body sensor once detects no human body and then detects again, the input by the operating means is guided by voice, and then the input operation by the operating means is detected. after, by returning the heating power or temperature setting of the heat source to the original setting, the fire accident due to a malfunction of the human body sensor reliably prevented, in which it is able to improve the safety.

According to the second aspect of the present invention, when the human body sensor does not detect the human body for a predetermined time or more after the start of cooking , the indicator is turned off, and after leaving the cooking device once in the middle of cooking, again When the display unit does not light even when the human body approaches the cooking device, the malfunction of the human body sensor can be reliably confirmed by visual observation, and the safety can be further improved.

  An embodiment of the present invention will be described first with reference to FIG. 1. Reference numeral 1 denotes an electromagnetic cooker body which is used by being incorporated into a system kitchen or the like by a drop-in method, and a top plate 2 made of heat-resistant glass is mounted on the upper surface. In addition, a pair of left and right induction heating coils 3 and 4 and a radiant heater 5 which are heat sources are built in the lower part of the top plate.

  On the other hand, an operation panel 6 is disposed on the right side of the front surface of the electromagnetic cooker body 1, and a grill door 8 for the grill 7 is disposed on the left side of the operation panel so as to be freely retractable. The operation panel 6 is provided with a seesaw type power switch 9 and displays 10, 11, 12 and the like constituted by a plurality of liquid crystal panels with a backlight.

  As shown in FIG. 2, the operation panel 6 is mainly divided into three sections in the left-right direction, the power switch 9 is provided at the upper right end, and the left end of the three sections is mainly guided. The heating coil 3 is operated, the center is set for operating the grille 7 and the radiant heater 5, and the right end is set for operating the induction heating coil 4.

  The indicators 10, 11 and 12 are arranged at the top of each of the three sections, and the time setting key 13,..., Minute setting key 14,. .. The timer setting keys constructed from the above are arranged in a horizontal row, and an operation key 16 for turning on / off the power to the grill heater in the grill 7 is arranged under the keys 13, 14 in the center. ing.

Further, at the bottom of the three sections , a push-push operation and a knob 17 for operation and heating power setting that can be rotated are arranged. When the knob 17 is pulled out by the push-push operation, the induction heating coil 3 is pulled out. 4 and the radial heater 5 are energized, and when they are pushed in, the operation is stopped, and when they are rotated at the pull-out position, the heating power and the set temperature for cooking can be set.

  In addition, a human body sensor 18 composed of an infrared sensor, an ultrasonic sensor or the like is disposed at the left end of the operation panel 6. The human body sensor detects the presence or absence of a human body around the electromagnetic cooker body 1 and also supplies power. Below the switch 9, an input key 19 for performing an input operation when the human body once leaves the electromagnetic cooker body 1 and returns, and a voice key 20 for switching whether to notify by voice are arranged.

  FIG. 3 is a circuit block diagram of the control unit 20 that controls the energization of the induction heating coils 3, 4 and the like. The commercial 200 V power source 21 is connected to the power switch 9, the input current detection circuit 22, and the power circuit 23. The inverter circuit 24 is connected to the inverter circuit, the induction heating coils 3 and 4 are connected to the inverter circuit via the coil current detection circuit 25, and the inverter circuit 24 is controlled by comparing these current values. is doing.

  A control circuit 27 mainly composed of a microcomputer is connected to the power supply circuit 23 through an input voltage detection circuit 26, and the input current detection circuit 22 and coil current detection circuit are connected to each input port of the control circuit. 25 outputs are connected.

  Further, the input port of the control circuit 27 includes a coil temperature sensor 28 for detecting the temperature of the induction heating coils 3 and 4, and the temperature of a pot 29 that is a cooking object placed on the top plate 2. Are connected to the pan bottom temperature sensor 30, the human body sensor 18, and the key group 31 arranged on the operation panel 6, and the output port is connected to the speaker 33 via the inverter circuit 24 and the audio output circuit 32. The indicators 10, 11, and 12 arranged on the operation panel 6 are connected to each other.

  Thus, the operation in the case of cooking with the induction heating coils 3 and 4 will be briefly described. When the power switch 9 is turned on, the pot 29 or the like is placed above the induction heating coils 3 and 4 of the top plate 2. The induction heating coils 3 and 4 to be used are placed on the object to be cooked, and the operation of the heat source knobs 17 and 17 to be used is pushed out and pulled out, so that these operations are detected by the control circuit 27 and the inverter circuit 24 is controlled. High-frequency power is supplied to and heating cooking is started.

Further, the power to the induction heating coils 3 and 4 is controlled in accordance with the heating power set by the rotary operation of the knobs 17 and 17 to heat with the set heating power, or the temperature detected by the pan bottom temperature sensor 30 and the knobs 17 and 17 are controlled. The cooking object is heated to the set temperature by controlling the power to the induction heating coils 3 and 4 by comparing with the set temperature set by the rotating operation.

  On the other hand, the control circuit 27 detects the presence or absence of a human body around the electromagnetic cooker body 1 from the output of the human body sensor 18, and lowers the set temperature when no human body is detected for a predetermined time (for example, 5 minutes) after cooking is started. When the set thermal power is higher than “medium”, for example, safety control is performed so as to lower it to “medium”, and the backlights of the display units 10, 11 and 12 are turned off.

Further, the control circuit 27, when you are reducing the set temperature and the set thermal power without detecting the predetermined time human body detects a human body again by the body sensor 18 detects whether the input key 19 is turned on, ON When the operation is performed, the set temperature and the set heating power are restored to the original set state, and the backlights of the display units 10, 11, and 12 are turned on. If the input key 19 is not turned on, the voice output circuit 32 is activated, and a message prompting key input from the speaker 33 is notified.

With these configurations, when the human body sensor 18 detects the human body again and then detects the input operation by the input key 19, the human body sensor 18 is again set to return to the original setting by returning the set temperature and the set thermal power. compared with the case where the detected automatically when the set temperature and set heating power of the human body proximity Ru is returned to the original setting, in which it is possible to reliably prevent the fire accident due to a malfunction of the human body sensor 18. Further, in the above embodiment, when the human body sensor 18 detects the human body again and no key input is made, the notification is given by voice. However, the present invention is not limited to this. may be carried out notification by blinking of the 11, 12 backlight, in which it is capable to improve the visibility and reduce power consumption by turning off the backlight.

  In addition, by using the backlights of the display units 10, 11, and 12 to provide notification, an audio output circuit is not required and the visibility is relatively high. It can be measured.

  Further, when the human body sensor 18 detects a human body, the backlights of the display units 10, 11, and 12 are turned on and notified, and if there is no input operation even after a predetermined time has passed, the notification is made by flashing the backlight or by sound. You may comprise.

  Further, in the above embodiment, the input key 19 is provided and the set temperature and the set heating power are restored to the original setting by the input operation with this key. However, the present invention is not limited to this, and other time setting keys are used. 13 ··· The minute setting key 14 ···, the cancel key 15 ···, and the knob 17 ··· can be configured to be restored. In this case, a dedicated key is not required and the cost is reduced by reducing the number of parts. You can measure down.

  In the above-described embodiment, the human body sensor 18 is configured to decrease the set temperature and the set thermal power when the human body is no longer detected. However, when cooking with low possibility of ignition such as boiled food cooking, the human body is not detected and the predetermined temperature is set. If the human body is not detected after a lapse of time, the heating power is changed to the preset heating power for a predetermined time, or heating is performed until the temperature reaches a preset temperature or a temperature lower than the preset temperature. Can be reduced.

It is a perspective view which shows the Example of the electromagnetic cooker using this invention. It is a front view which similarly shows the Example of an operation part. It is a block diagram which similarly shows the Example of a control part.

Explanation of symbols

1 Electromagnetic cooker body 3 Induction heating coil (heat source)
4 Induction heating coil (heat source)
6 Operation panel (operation means)
DESCRIPTION OF SYMBOLS 10 Display 11 Display 12 Display 18 Human body sensor 20 Control part (control means)

Claims (2)

A cooker body, a heat source disposed in the cooker body, operation means for setting the heating power and set temperature of the heat source, a display for displaying input information from the operation means, and the approach of the human body And a control means for controlling the heat source and the display based on inputs from the human body sensor and the operation means , and the control means is controlled by the human body sensor for a predetermined time or more after the start of cooking. when no longer detect the human body, in that configured so as to set a low heating power and the set temperature of the heat source, the control means is set lower the heating power or the like of the heat source no longer detect the human body sometimes sometimes detected human body again by the human sensor, and guides the operator input means by voice to return the thermal, etc. of the heat source after detecting the input by the operation means by the guide to its original configuration Cooking device, characterized in that it was constructed as. It said control means, when the human body sensor over a predetermined time after the cooking start is not detected human body, characterized in that configured so as to turn off the display, cooking according to the claim 1 vessel.

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