JPH06265158A - Heating cooker - Google Patents

Abstract

PURPOSE:To sufficiently improve safety when a person is not handled and to improve convenient operability even when a person is handled. CONSTITUTION:A cooking heater has a high temperature switch 14 for detecting a temperature near a bottom of a pan and turning OFF when its detected temperature reaches a set temperature in a conducting circuit of a heater 4 for heating oil contained in the pan, and has a human sensor 19 for detecting presence of a person. The heater has a microcomputer 40 for starting counting when the switch 14 is turned OFF during conducting of the heater 4, resetting the counting when presence of the person is detected by the sensor 19 and interrupting the heater 4 or lowering a heating output of the heater 4 when a set time is counted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooking device which is suitable for cooking heaters and the like and which has improved safety and usability when cooking deep-fried food.

[0002]

2. Description of the Related Art In a conventional cooking heater, a temperature switch for detecting the temperature near the bottom of the cooking container (around the heater) and turning off when the detected temperature exceeds a set temperature is provided in the energizing circuit of the heater. There is something. With this configuration, the temperature in the vicinity of the bottom of the cooking container does not rise abnormally, so there is some safety in terms of fire prevention.

Further, there is provided a temperature sensor for detecting the temperature of oil during the fried food cooking, and the heater is turned on and off so that the temperature detected by the temperature sensor is maintained at the set cooking temperature. A cooking heater is also provided. Also in the case of this cooking heater, the oil temperature does not rise abnormally, so there is some safety in terms of fire prevention.

Further, in order to prevent the heating by the heater from continuing in the absence of a person, an automatic power-off function is provided for automatically turning off the heater when a predetermined set time elapses after the heater is turned on. A cooking heater is also provided.

[0005]

However, when fried food is cooked in the above-mentioned conventional structure having the temperature switch, the temperature in the vicinity of the bottom of the pan serving as the cooking container does not rise abnormally. , The temperature of the oil in the pan could rise to the ignition point and cause the oil to ignite, and it could not be said that the safety was sufficient when there were no people on the table.

Further, in the structure for controlling the temperature of the oil by providing the temperature sensor for detecting the temperature of the oil, when the amount of the oil in the pan is small, the temperature sensor is not inserted in the oil. A state occurs, and at this time, the temperature of the air warmed by the oil is detected and the temperature of the air is controlled, so in such control, the oil temperature rises to the ignition point and the oil is It could catch fire, and when there were no people in it, it was not safe enough.

Further, in the structure having the automatic power-off function, the heater is turned off after a predetermined set time has passed after the heater is turned on even while a person is cooking with the person. So it wasn't very easy to use. However, if the set time is lengthened, there is a drawback that the safety in terms of fire prevention becomes low.

[0008] Therefore, an object of the present invention is to provide a heating cooker capable of sufficiently improving the safety when a person is not attached and improving the usability when the person is attached.

[0009]

The cooking device according to the present invention comprises:
A temperature that is provided with a heater that heats the food contained in the cooking container, is provided in the energizing circuit of the heater, detects the temperature near the bottom of the cooking container, and turns off when the detected temperature reaches the set temperature. In a heating cooker including a switch, a person sensor for detecting the presence of a person is provided, and further, when the temperature switch is turned off while the heater is energized, a timekeeping operation is started, and a person is detected by the person sensor. When it is detected that the heater is detected, the timer operation is reset, and when the set time is measured, the timer is cut off or the heating output of the heater is lowered.

In a heating cooker according to a modified embodiment of the present invention, a heater for heating a food item contained in a cooking container is provided, a temperature sensor for detecting the temperature of the food item is provided, and detection by the temperature sensor is provided. In a heating cooker configured to control energization of the heater based on temperature, a human sensor for detecting the presence of a person is provided, and the human sensor does not detect the person while the heater is energized. A timer means for starting the time counting operation at the point of time, resetting the time counting operation when the presence of a person is detected by the human sensor, and turning off the heater or lowering the heating output of the heater when the set time is timed. And further comprising time changing means for changing the length of the set time of the timer means in accordance with the temperature detected by the temperature sensor. A.

[0011]

According to the above means, when the temperature in the vicinity of the bottom of the cooking container reaches the set temperature, the temperature switch is turned off, and the time counting operation of the timer means is started when there is no person. Then, after this, when the timer means completes the measurement of the set time in a state where no person is on, the heater is turned off or the heating output of the heater is lowered.
For this reason, the temperature of the cooking product (for example, oil) does not rise to the ignition point when no one is on, and the safety is sufficiently high. On the other hand, when the person is on or when the person returns while the timer means is counting the time, the timing operation of the timer means is reset, so that the heater is cut off or the heating output of the heater is lowered during cooking. Is eliminated and the usability is improved.

Further, in the case of a structure in which a temperature sensor for detecting the temperature of cooked food (for example, oil) is provided to control the temperature of the cooked food, the clocking operation is started when no one is present, and the set time is clocked. Since the timer means for turning off the heater or lowering the heating output of the heater is provided at times, even when the amount of food is small and the temperature sensor is not detecting the temperature of the food, when there is no person , The temperature of cooked food will not rise to the ignition point, and the safety will be sufficiently high. Moreover, in this case, since the length of the set time of the timer means is changed according to the temperature of the cooked product, for example, the set time is shortened when the detected temperature is high and set when the detected temperature is low. The longer the length, the higher the safety. On the other hand, when there are people, or
When a person returns while the timer means counts the time, the timing operation of the timer means is reset, so that the heater will not be cut off or the heating output of the heater will not be lowered during cooking, thus improving the usability.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a cooking heater will be described below with reference to the drawings. First,
In FIG. 2 showing the overall configuration of the cooking heater, the main body 1 is formed in a rectangular box shape and incorporated in, for example, a cooking table 2. A translucent top plate 3 made of, for example, crystallized glass (heat-resistant glass) is provided on the upper surface of the main body 1. Below the top plate 3, for example, three heating units 4, 5 and 6 are disposed as heaters at the front left and right and the center of the rear.

The heating units 4 and 5 arranged on the left and right sides are
A plurality of halogen lamp heaters 7, for example, four halogen lamp heaters 7 are respectively supported on a container 8 having a heat insulating property, and a temperature detecting device 9 is attached. The heating unit 6 at the center of the rear part is configured by supporting an annular sheathed heater 10 on a support 11 having a heat-insulating container shape and mounting a temperature detecting device (not shown). in this case,
Each heating unit 4, 5, 6 (halogen lamp heater 7,
By energizing the sheath heater 10), a cooking container, for example, a pot 12 placed on the top plate 3 is heated, and a cooked product (eg, oil) stored in the pot 12 is heated.
Are being cooked. A roaster 13 is arranged in the center of the lower part of the main body 1.

Further, the temperature detecting device 9 of each heating unit 4, 5, 6 has a high temperature switch 14 (see FIG. 1) as a temperature switch provided in the energizing circuit of the heating units 4, 5, 6 and a low temperature. The temperature switch 15 (see FIG. 1) is provided. In this case, the high temperature switch 14
Has an off set temperature (upper limit set temperature) of, for example, 750 ° C.
(Lower than the heat resistant temperature of the top plate 3) and the ON set temperature (lower limit set temperature) is, for example, 7
It is set to 00 ° C. That is, the high temperature temperature switch 14
Is the heating unit 4, which is the temperature near the bottom of the pot 12,
It is turned on until the temperature around 5 and 6 rises to the off set temperature, is turned off when the off set temperature is reached, and is turned off after the off operation until it is lowered to the on set temperature.
It turns on when the temperature reaches the set temperature. The low temperature switch 11 is set to be turned off at about 60 ° C. or higher and turned on at less than about 60 ° C.

On the other hand, a roaster 13 is provided on the front surface of the main body 1.
Operation panels 16 are provided on both left and right sides of the. A power switch 17 and a power lamp 18 are provided on the right panel portion of the operation panel 16, and a display unit and an operation switch group corresponding to the right heating unit 5 and the left heating unit 4 are provided. Is provided with a display section and an operation switch group corresponding to. Further, a human sensor 19 for detecting the presence of a person and a human sensor lamp 20 are provided on the left side panel portion of the operation panel 16, and a display unit corresponding to the heating unit 6 in the rear center and An operation switch group, a display unit corresponding to the roaster 13, and an operation switch group are provided.

Since the display units and operation switch groups corresponding to the respective heating units 4, 5, 6 have substantially the same structure, the display units and operation switch groups corresponding to the left heating unit 4 will be described. That is, an "on" switch 21 for turning on the heating unit 4, an "off" switch 22 for turning off the heating unit 4, an "up" switch 23 for increasing the heating output of the heating unit 4, and a heating output for the heating unit 4. A “down” switch 24 is provided, and a heating power display unit 25 for displaying the heating output of the heating unit 4 is provided. Furthermore, the left heating unit 4
Only the fried food switch 26 and the fried food LED 27
Is provided. The thermal power display unit 25 is configured by arranging, for example, eight LEDs 25a (see FIG. 1) in a horizontal row. Incidentally, corresponding to the roaster 13, an “ON” switch 21 for turning on the roaster 13, an “OFF” switch 22 for turning off the roaster 13, and a display LED 28 for displaying the ON / OFF state of the roaster 13 are provided.

The human sensor 19 is composed of, for example, an infrared detection type sensor, and detects a person when the person is on the front side of the main body 1 of the cooking heater and outputs a person detection signal. Has become. Then, as shown in FIG. 3, the infrared reflecting mirror 2 is provided on the left side of the human sensor 19.
9 is rotatably provided with its left end 30 as a fulcrum of rotation. The infrared reflecting mirror 29 is configured such that at least the reflecting surface is provided with an infrared reflecting substance, and can be held at a desired turning position rotated by a user. In this case, as shown in FIG. 4, when the infrared reflecting mirror 29 is rotated, the human sensor 19 can detect the infrared rays from the person 32 standing in front of the sink unit 31. The sensor 19 detects the person 32 in front of the sink 31. Incidentally, without the infrared reflecting mirror 29, as shown in FIG. 5, the human sensor 19 cannot detect the person 32 in front of the sink 31, and in such a case, it is determined that there is no person. Will be lost.

On the other hand, as shown in FIG. 2, a temperature probe 33, which is a temperature sensor for detecting the temperature of the oil in the pan 12 during frying, is provided as an accessory to the main body 1. The temperature detecting portion 33a provided at one end of the temperature probe 33 is configured to be detachably attached to the upper opening edge portion of the pot 12, and in the attached state, the temperature detecting portion 33a is inside the pot 12. It is designed to be dipped in oil. At the other end of the temperature probe 33, a connection jack 33b for connecting the temperature probe 33 to the main body 1 is provided. The connecting jack 33b is provided at the left end corner of the rear side of the upper surface of the main body 1.
A jack receiving portion 34 for inserting and connecting is provided.

Now, referring to FIG. 1, the electric configuration of the cooking heater is shown in the right and rear central heating units 5 and 6.
In addition, the part related to the roaster 13 is omitted. In FIG. 1, a series circuit composed of the halogen lamp heater 7, the high temperature temperature switch 14 and the triac 38 of the left heater unit 4 is connected between the AC power supply lines 36 and 37 derived from the AC power supply 35. A series circuit including the power lamp 18 and the resistor 39 is connected in parallel with the series circuit between the AC power supply lines 36 and 37. The power switch 17 is provided between one end of the power lamp 18 of the one AC power line 37 and the AC power supply 35.

Further, the triac 38 for disconnecting electricity from the halogen lamp heater 7 is controlled by a microcomputer 40 which is a control circuit, and a triac drive circuit 41.
ON / OFF control is performed via. The microcomputer 40 has a function of controlling the entire heating operation of the cooking heater, and stores a control program therefor. This microcomputer 4
0 has each function of a timer means and a time changing means.

Further, a power switch detection circuit 42 is provided between the AC power supply lines 36 and 37. The power switch detection circuit 42 detects the on / off state of the power switch 17 and outputs the detection signal to the microcomputer. It is configured to be given to 40. A temperature switch detection circuit 43 is connected between both terminals of the high temperature temperature switch 14. The temperature switch detection circuit 43 is composed of, for example, a photocoupler 43a, and detects the on / off state of the high temperature temperature switch 14 and gives the detection signal to the microcomputer 40.

On the other hand, a constant voltage circuit 46 is connected via a step-down transformer 44 and a rectifier 45 to a portion of the AC power supply lines 36 and 37 closer to the AC power supply 35 than the power switch 17. . This constant voltage circuit 46
Is for supplying operating power to various circuits such as the microcomputer 40 that require a DC constant voltage power supply.

The microcomputer 40 detects the on / off state of the low temperature switch 15, the detection signal from the burn detection circuit 47, the detection signal from the zero cross circuit 48, the reset signal from the reset circuit 49, and the temperature probe 33. It is designed to receive a temperature detection signal from. Further, the microcomputer 40 controls the buzzer to ring by controlling the energization of the buzzer circuit 50, and is provided in the center of the lower surface front part of the eight light emitting diodes 25a of the thermal power display unit 25, the fried LED 27, and the top plate 3. Further, the high temperature caution LED 51 and the human sensor LED 20 are configured to control energization.
The high-temperature caution LED 51 is a low-temperature switch 1
When the switch 5 is turned off, that is, when the temperature of the top plate 3 exceeds about 60 ° C., the flashing light is turned on, which may cause burns when the user touches the top plate 3. There is a structure to note that there is.

Then, the microcomputer 40 is
"ON" switch 21, "OFF" switch 22, "UP"
Each of the switch signals from the switch 23, the “down” switch 24, and the fried food switch 26 is received, and the human detection signal from the human sensor 19 is sent to the preamplifier 52 and the comparator 53.
It is supposed to be received via.

Next, the operation of the above configuration will be described with reference to FIGS.
Will be described with reference to. The flowcharts shown in FIG. 6 and FIG. 7 show the partial control of the control program stored in the microcomputer 40, that is, the set time of the timer for the human sensor 19 according to the number of times the high temperature switch 14 is turned off. The content of the heating operation control for performing the changing control is shown. In addition, the flowchart shown in FIG.
The content of the heating operation control for performing control for changing the set time of the timer for the human sensor 19 according to the temperature of the oil detected by the temperature probe 33 is shown.

Now, in the case of forgetting to put the temperature probe 33 in the oil of the pan 12 when cooking the deep-fried food, or when the temperature probe 33 is not used, the high temperature switch 14 is provided. However, there is a possibility that the temperature of the oil rises due to the electric heating of the heating unit 4, and eventually the ignition point is reached and the oil ignites. Specifically, when the heating unit 4 is continuously energized, the temperature around the heating unit 4 (near the bottom of the pan 12) rises, the high temperature switch 14 is turned off, and the heating unit 4 is cut off. To be done. As a result, the top plate 3 is destroyed and the pan 12
Although there is no abnormal temperature rise near the bottom of the heating unit 4, when the temperature around the heating unit 4 decreases thereafter, the high temperature switch 14 is turned on and the heating unit 4 is energized.
Therefore, as shown in FIG. 9, the high temperature switch 14 repeats the on / off operation (the shaded area in FIG. 9 is the on period).

At this time, the high temperature switch 14 is turned on and off, and the heating unit 4 repeats disconnection.
The temperature of the oil gradually rises until it reaches the ignition point. That is, when the high temperature temperature switch 14 is turned off for the first time, the oil temperature is about 200 ° C. After that, when the high temperature temperature switch 14 is turned on and off four times and about 8 minutes have elapsed, the oil temperature changes to 340 ° C. The ignition point of ℃ is reached.

For this reason, when no person is on, if the heating unit 4 is turned off at the time when, for example, 8 minutes have passed as the set time after the high temperature temperature switch 14 has been turned off once, the oil temperature will change. It can be prevented from rising to the ignition point. In this case, if the number of times the high temperature switch 14 is turned off increases, the time until the oil temperature reaches the ignition point becomes shorter as shown in FIG. 9, so the length of the set time needs to be changed. There is. Hereinafter, the heating control for preventing ignition will be specifically described with reference to FIGS. 6 and 7.

First, when the power switch 17 is turned on (step A1), the power lamp 18 is turned on, and then,
When the "ON" switch 21 is turned on (step A2), the heating unit 4 is energized to start heating (step A3). After this, it is judged whether or not the high temperature switch 14 is turned off (step A4), and if the temperature around the heating unit 4 (near the bottom of the pan 12) does not become high, the high temperature switch 14 will not be turned off. In step A4, the operation proceeds to "NO", and the heating unit 4 is continuously energized until the "off" switch 22 is operated (step A5).

On the other hand, when the temperature around the heating unit 4 (near the bottom of the pan 12) becomes high, the high temperature temperature switch 14 is turned off, the process proceeds to "YES" at step A4, and the heating unit 4 is cut off. At the same time (step A6), the number N of off operations of the high temperature temperature switch 14 is counted up (step A7). The number N of off operations is previously cleared to zero when the power is turned on (or when the energization of the heating unit 4 is started), and in this case, N =
It becomes 1.

Subsequently, it is judged whether or not the timer built in the microcomputer 40 is in the time counting operation (step A8). In this case, since it is not in the time counting operation,
In step A8, the process proceeds to “NO”, and the process of setting the timer setting time (measurement time) is performed (step A
9). In this processing step, as shown in FIG. 7, the length of the set time (clocking time) is changed according to the value of the number N of times the high temperature switch 14 is turned off. Specifically, if N = 1, the set time is 8 minutes, if N = 2, the set time is 6 minutes, if N = 3, the set time is 4 minutes, and N = 4.
If so, after setting the set time to 2 minutes (steps B1 to B
8) Start the timer operation. In this case, N = 1
Therefore, the set time of the timer is set to 8 minutes and the time counting operation is started.

After that, when the temperature around the heating unit 4 is lowered and the high temperature switch 14 is turned on during the time counting operation of the timer, the process proceeds to "YES" in step A10, proceeds to step A3, and heats. Re-energize unit 4.
After this, when the temperature around the heating unit 4 rises and the high temperature switch 14 is turned off again, the heating unit 4
Is turned off and the number N of off-operations is counted up (steps A4, A6, A7), but since the timer is counting, the process proceeds to “YES” in step A8.
The timer setting time is not changed.

If the high temperature switch 14 is not turned on in step A10, the process proceeds to "NO" in step A10 and it is determined whether or not a person is detected by the human sensor 19 during the time counting operation of the timer ( Step A1
1). Here, while the human sensor 19 does not detect a person,
When the time counting operation of the timer is completed, the process proceeds to “NO” in step A11, the human sensor LED 20 is turned on and off (step A12), and the heating unit 4 is turned off (step A13).

On the other hand, in step A11, when a person is detected by the human sensor 19 during the time counting operation of the timer, the process proceeds to "YES" in step A11 and the "OFF" switch 2
It is determined whether or not No. 2 has been operated (step A14).
Here, if the "off" switch 22 is operated, the process proceeds to "YES" at step A14 to turn off the heating unit 4 (step A13). If the "off" switch 22 is not operated, the process proceeds to "NO" in step A14 to reset the timer operation (step A1).
5) and shifts to step A4. In this case, the temperature around the heating unit 4 rises and the high temperature switch 14
When is turned off again, the set time of the timer is changed and set according to the value of the number N of times of turning off, and the time counting operation is started. Then, the subsequent processing is repeated in substantially the same manner as the above-mentioned processing. The heating operation control described above can be executed in each of the three heating units 4, 5, and 6.

However, according to the above heating operation control, when the temperature around the heating unit 4 (in the vicinity of the bottom of the pan 12) rises and reaches the set temperature, the high temperature temperature switch 14
When is turned off and no one is on, the time counting operation of the timer is started. Then, after this, when the timer completes the measurement of the set time with the person left unattended, the heating unit 4 is cut off before the temperature of the oil in the pot 12 rises to the ignition point. For this reason, even if a person leaves the place when fried food is cooked, the temperature of the oil in the pan 12 does not rise to the ignition point, and safety is sufficiently enhanced. On the other hand, when the person is on or when the person returns while the timer is counting, the timer's timing operation is reset, so that the heating unit 4 is not cut off during cooking, and the usability is good. Become.

As shown in FIG. 9, the time from when the high temperature temperature switch 14 is turned off until the temperature of the oil reaches the ignition point varies depending on the value of the number N of off operations. On the other hand, in the case of the above configuration, since the length of the set time of the timer is changed according to the value of the number N of times the high temperature switch 14 is turned off, the high temperature switch 1
Even when a person leaves the place at any time when the number N of OFF operations of No. 4 does not occur, the temperature of the oil in the pan 12 does not rise to the ignition point, and the safety against fire is further enhanced.

Next, FIG. 10 shows a structure in which the temperature of the oil in the pan 12 is detected by the temperature probe 33 and the heating unit 4 is controlled to be turned on and off based on the detected temperature.
It is a graph which shows the temperature change of oil when the amount of oil contained in it is small. In this case, since the amount of oil is small, the temperature detection unit 33a of the temperature probe 33 may not be inserted into the oil in the pan 12, and the temperature probe 33 does not detect the temperature of the oil. The temperature of the air warmed by will be detected. Therefore, since the oil temperature was not detected, it was found that the oil temperature continued to rise and reached the ignition point, and the oil ignited. Specifically, when the temperature detected by the temperature probe 33 reaches, for example, 100 ° C. when the amount of oil is small, it is found that the oil temperature reaches the ignition point of 340 ° C. after about 15 minutes have passed, In such a case, if the person is not away from the place,
The oil ignites and becomes a fire.

The time required for the oil temperature to reach the ignition point depends on the temperature detected by the temperature probe 33. Specifically, as shown in FIG. 10, it is about 15 minutes when the temperature T detected by the temperature probe 33 is 100 ° C., about 8 minutes when the temperature T is 150 ° C., and the temperature T is 200 ° C. It takes about 5 minutes. For this reason, if it is detected that no person is attached and the heating unit 4 is automatically turned off when a set time has elapsed after the detection, it is possible to prevent the oil temperature from rising to the ignition point. In this case, if the configuration is such that the length of the set time of the timer is changed according to the temperature T (oil temperature) detected by the temperature probe 33, the safety is further enhanced. Hereinafter, the heating operation control will be specifically described with reference to FIG. When cooking fried food using the temperature probe 33, the connection jack 33b of the temperature probe 33 is inserted into the jack receiving portion 34 of the main body 1 to be connected, and the left heating unit 4 is connected.
To use.

First, when the power switch 17 is turned on (step C1), the power lamp 18 is turned on, and then the fried food switch 26 is turned on and the "ON" switch 21 is turned on.
When is turned on (step C2), the heating unit 4 is energized to start heating (step C3). in this case,
Although not shown, the heating unit 4 includes a temperature probe 33.
The electric current is controlled so that the temperature of the oil detected by is maintained at a preset cooking temperature.

With this control, the process proceeds to step C4, the temperature of the oil in the pan 12 is detected by the temperature probe 33, and the microcomputer 4 according to the detected temperature T.
A process of setting the length of the set time (clocking time) of the timer built in 0 is performed. Specifically, if T <100 ° C., the timer setting time (clocking time) is set to 15 minutes (steps C5 and C6), and if 100 ° C. ≦ T <150 ° C., the setting time is set to 8 minutes (step C7). , C8), 150 ° C. ≦ T
If <200 ° C, set the time to 5 minutes (Step C
9, C10), if 200 ° C. ≦ T, the set time is set to 3 minutes (step C11), and then the time counting operation of the timer is started.

After that, the human sensor 1 is operated while the timer is operating.
9. It is determined whether or not a person is detected by 9, and if the person is not detected by the human sensor 19 until the time counting operation of the timer is completed, the process proceeds to “YES” in step C12 to turn on the human sensor LED 20. While blinking and lighting (step C13), the heating unit 4 is turned off (step C14).

On the other hand, during the time counting operation of the timer, the human sensor 19
If a person is detected by, the process proceeds to "NO" in step C12 and it is determined whether the "off" switch 22 is operated (step C15). Here, if the "OFF" switch 22 is operated, "YE
S ”to turn off the heating unit 4 (step C1)
4). If the "off" switch 22 is not operated, the process proceeds to "NO" in step C15 and then to step C3.
And the energization of the heating unit 4 is continued, and the set time of the timer is set again in accordance with the detected temperature T detected by the temperature probe 33 (that is, the time counting operation of the timer is reset) and the time counting operation is started. It is supposed to be done.

According to the above heating operation control,
In the configuration in which the temperature of the oil in the pan 12 is detected by the temperature probe 33, and the temperature of the oil is controlled by turning on and off the heating unit 4 based on the detected temperature, the timekeeping operation is performed when no one is present. Since the timer (microcomputer 40) for turning off the heating unit 4 when the set time is started is set, the pot 12
Even when the temperature probe 33 does not detect the temperature of the oil due to the small amount of oil in it, when there is no person,
The oil temperature will not rise to the ignition point, and the fire safety will be sufficiently high.

Moreover, in this case, since the length of the set time of the timer is changed according to the temperature of the oil, that is, the detected temperature T detected by the temperature probe 33, the set time is shortened when the temperature is high, for example. If the set time is extended when the temperature is low, the safety becomes higher. On the other hand, when a person is on or when a person returns while the timer is counting, the timing operation of the timer is reset.
The heating unit 4 will not be cut off during cooking,
It is easy to use.

In the above embodiment, the heating unit 4 is turned off when no human is detected by the human sensor 19 until the time counting operation of the timer is completed.
The configuration is not limited to this, and the heating output of the heating unit 4 may be reduced.

[0047]

As is apparent from the above description, the present invention starts the timing operation when the temperature switch is turned off while the heater is energized, and resets the timing operation when the presence of a person is detected by the human sensor. In addition, since the timer means for disconnecting the heater or lowering the heating output of the heater when the set time is measured is provided, it is possible to sufficiently improve the safety when there is no person, and When it is present, it has an excellent effect of improving usability.

Further, in the structure in which the temperature of the food is detected by the temperature sensor and the heater is energized and controlled based on the detected temperature, the time is measured when the human sensor stops detecting the person while the heater is energized. When the human sensor detects the presence of a person after the operation is started, the timer operation is reset, and when the set time is measured, the heater is cut off or the heating output of the heater is lowered, and the temperature sensor is provided. Since the time changing means for changing the length of the set time of the timer means is provided in accordance with the detected temperature detected by, the safety when the person is not still present can be sufficiently improved and the person is still present. At times, it has the excellent effect of improving usability.

[Brief description of drawings]

FIG. 1 is an electric circuit diagram showing an embodiment of the present invention.

FIG. 2 is a cutaway perspective view of a cooking heater.

FIG. 3 is a perspective view of a human sensor and a reflector.

[Figure 4] Top view of the kitchen

FIG. 5 is a view corresponding to FIG. 4 when a reflector is not provided.

FIG. 6 is a flowchart.

FIG. 7: Flow chart

FIG. 8 is a flowchart

FIG. 9 is a graph showing changes in the oil temperature when the high temperature temperature switch is turned on and off.

FIG. 10 is a graph showing changes in the temperature of oil when the amount of oil in the pan is small.

[Explanation of symbols]

1 is a main body, 3 is a top plate, 4, 5 and 6 are heating units (heaters), 7 is a halogen lamp heater, 9 is a temperature detecting device, 10 is a sheath heater, 12 is a pot (cooking vessel), and 14 is a high temperature. Switch (temperature switch), 15
Is a low temperature switch, 19 is a human sensor, 29 is an infrared reflecting mirror, 32 is a person, 33 is a temperature probe (temperature sensor),
38 is a triac, 40 is a microcomputer (timer means, time changing means), and 43 is a temperature switch detection circuit.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Genichiro Kono, Genichiro Kono, 4-21-21, Yoshihara-cho, Nishi-ku, Nagoya City Toshiba Abu E-E Co., Ltd. Nagoya Office

Claims (2)

[Claims] 1. A heater is provided for heating a food item contained in a cooking container, and the temperature in the vicinity of the bottom of the cooking container provided in an energizing circuit of the heater is detected to reach a set temperature. In a cooking device provided with a temperature switch that is turned off at times, a human sensor that detects the presence of a person and a timekeeping operation is started when the temperature switch is turned off while the heater is energized. A cooking device characterized by comprising timer means for resetting the time counting operation when detecting the presence of a person, and for turning off the heater or lowering the heating output of the heater when the set time is timed. 2. A heater for heating a food item contained in a cooking container is provided, and a temperature sensor for detecting the temperature of the food item is provided, and the heater is energized based on the temperature detected by the temperature sensor. In the heating cooker configured as described above, a human sensor for detecting the presence of a person, and when the human sensor stops detecting the person while the heater is energized, a timekeeping operation is started, and the human sensor When the presence of a person is detected by the
Timer means for turning off the heater or lowering the heating output of the heater when the set time is measured, and a time change for changing the length of the set time of the timer means according to the detected temperature detected by the temperature sensor A cooking device characterized by comprising: