JP3405283B2 - Cooking device - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a heating cooker used in general households.

[0002]

2. Description of the Related Art A conventional cooking device will be described below with reference to FIGS. FIG. 11: is a block diagram of the heating cooker of a conventional structure. In FIG. 11, reference numeral 1 is a cooker that stores food, 2 is an upper heater that heats the food in the cooker 1 from above, 3 is a lower heater that heats the food in the cooker 1 from below, and 4 is The saucer is provided below the lower heater 3 and receives the fat or the like dripping from the food. Reference numeral 5 denotes a grill which is installed on the pan 4 so that the food in the cooking cabinet 1 can be installed between the upper heater 2 and the lower heater 3. 6 is a handle, 7 is a glass window, and 8 is a packing, which constitutes a door together with the saucer 4, and a person who uses the equipment can grab 6 and move it back and forth to open and close the door to put food in and out of the cooking cabinet 1. At the same time, look through the glass window 7 to check the quality of the food.

The packing 8 closes the gap between the door and the product casing to enhance the airtightness inside the cooking cabinet 1 so that smoke generated from the cooked food during heating and hot air inside the cooking cabinet 1 can pass through the gap. Prevent it from leaking. Reference numeral 9 is a timer that can be rotated clockwise and is configured to set a time corresponding to a rotation angle. A thermostat 10 is installed on the side surface of the cooking cabinet 1 and operates at a predetermined temperature (280 ° C.). Reference numeral 11 denotes a catalyst filter that passes and removes smoke and odor generated in the cooking cabinet 1.
A catalyst heater 12 heats the catalyst filter 11 to enhance the catalytic action. A smoke removing fan 13 generates an air flow that allows smoke and odor generated in the cooking cabinet 1 to pass through the catalyst filter 11.

FIG. 12 is a circuit diagram of a conventional cooking device. As shown in FIG. 12, when a cooking product is placed on the grill 5 and the door is closed and the timer 9 is rotated clockwise to set the cooking time, the timer switch 15 is closed for the time set by the timer 9, The commercial power supply 14 is energized to the upper heater 2, the lower heater 3, the catalyst heater 12, and the smoke removing fan 13 to start cooking. Then, the inside of the cooking cabinet 1 is heated by the upper heater 2 and the lower heater 3 and its temperature rises, and when the temperature inside the cooking cabinet 1 reaches 280 ° C. or higher, the thermostat 10 is activated to operate the upper heater 2 and the lower heater 3 together with the commercial heater. The power supply to the power source 14 is cut off. By this action, the internal temperature of the cooking cabinet 1 is maintained at a predetermined temperature.

[0005]

However, in the above-mentioned conventional configuration, when the food material installed in the grill 5 ignites while cooking foods having a large amount of fat components such as fish and chicken such as saury and herring, the cooking chamber is cooked. 1 The thermostat 1 is used until the time set by the timer 9 elapses, even though the inside of the kitchen is ignited and the cooked food is overbaked.
By the action of 0, heating in the cooking cabinet 1 is continued by the upper heater 2 and the lower heater 3, and the cooked food is damaged.

[0006] Further, when a food material having a large amount of fat is cooked and a new food material is continuously cooked in a state where the fat dropped from the cooked food is accumulated in the saucer 4, the temperature is sufficiently lower than the temperature at which the thermostat 10 operates. The oil accumulated in the saucer 4 or the oil smoke filled in the cooking cabinet 1 ignites at the cooking cabinet 1
There is a case where the inside becomes ignited, and in this case, it takes an extra time until the thermostat 10 is activated and the upper heater 2 and the lower heater 3 are de-energized, and the outer shell of the device and the like become excessively hot.

Therefore, in order to prevent the above-described ignition state, if water is put in the saucer 4 to prevent the saucer 4 from being ignited and the cooking cabinet 1 to be filled with oil smoke, the cooked food is heated and cooked next time. The water put in the saucer 4 fills the interior of the cooking chamber 1 with water vapor, and when fish is grilled, a fishy odor remains, or the cooked product becomes dull without being crispy.

Further, a temperature fuse is provided on the wall surface of the cooking cabinet 1 and when the temperature exceeds a predetermined temperature (> 280 ° C.), the temperature fuse is broken and the upper heater 2, the lower heater 3 and the catalyst heater 1 are provided.
2. In the case of the structure in which the power supply to any or all of the smoke removing fan 13 is cut off, once the thermal fuse is broken, the upper heater 2 and the lower heater are replaced unless the thermal fuse is replaced thereafter. 3, there is a problem that it is not possible to energize any or all of the catalyst heater 12 and the smoke removing fan 13, and new cooking cannot be performed.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to detect the ignition of a cooking product, terminate the cooking, and make the device reusable without separately repairing it.

Furthermore, it is an object of the present invention to set the ignition detection temperature corresponding to each temperature control temperature when there are a plurality of temperature control temperatures.

Another object of the present invention is to notify the fact that a fire has occurred by stopping heating and extinguishing the fire.

[0012]

In order to solve the above-mentioned problems, a heating cooker according to the present invention comprises a heating means for heating food in a cooking cabinet, and a temperature sensor for detecting the temperature in the cooking cabinet. Input means for inputting the start of cooking, ignition detection means for detecting that ignition is occurring in the cooking cabinet because the temperature detected by the temperature sensor is higher than a preset ignition detection temperature, The energization to the heating means is controlled by the relationship between the signal input from the temperature sensor and the temperature control temperature lower than the ignition detection temperature, and the energization to the heating means is performed based on the signal input from the ignition detection means. Control means for cutting off and maintaining thereafter and restarting energization to the heating means based on a signal inputted from the input means ;
And the control means has a plurality of modes and
The temperature control temperature is provided for each mode, and the ignition detection
The knowing means is in the mode selected by the controlling means.
The ignition detection temperature may be changed according to the controlled temperature .

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 comprises a heating means for heating the food in the cooking cabinet, a temperature sensor for detecting the temperature in the cooking cabinet, and an input means for inputting the start of cooking. An ignition detection unit that detects that ignition is occurring in the cooking chamber because the temperature detected by the temperature sensor is higher than a preset ignition detection temperature; a signal input from the temperature sensor; and Controls the energization to the heating means by the relationship with the temperature control temperature lower than the ignition detection temperature,
And controlling means for interrupting energization to the heating means based on a signal input from the ignition detection means, maintaining the same thereafter, and restarting energization to the heating means based on a signal input from the input means, the control Means are multiple modes
With the temperature control temperature for each mode.
And the ignition detection means is selected by the control means.
Corresponding to the controlled temperature in the mode
Since it is a heating cooker that changes the known temperature, for example when the temperature detected by the temperature sensor is in the vicinity of the controlled temperature and the control means controls the energization of the heating means When is ignited, it is possible to prevent the food in the cooking cabinet from being extinguished and the cooking to be finished by the following action, and to prevent the heating means from being energized again to damage the food.

That is, when the food in the cooking cabinet is ignited in the above-mentioned state, the temperature in the cooking cabinet rises, the temperature detected by the temperature sensor becomes higher than the temperature control temperature, and the control means directs the heating means. The electricity is cut off, but the cooked food is not extinguished for a while, and the temperature detected by the temperature sensor continues to rise.
Then, the ignition detection means eventually detects that ignition is occurring in the cooking cabinet because the temperature detected by the temperature sensor is higher than the ignition detection temperature, and the control means detects the ignition based on the signal input from the ignition detection means. This is because the power supply to the heating means is cut off and maintained thereafter.

Further, since the control means cuts off the energization to the heating means based on the signal input from the ignition detection means and maintains it thereafter and restarts the energization to the heating means based on the signal input from the input means, the inside of the cooking cabinet When the cooked food of (1) is ignited and cooking is completed, the person using the device takes out the ignited cooked food, newly installs the cooked food in the cooking cabinet, and operates the input means to perform cooking again, Unlike the case where the control means restarts the energization of the heating means and the energization of the heating means is interrupted by the temperature fuse, the cooking can be performed again after the ignition detection operation without separately repairing the device.

Further, the control means to have a plurality of modes
Both have the temperature control temperature for each mode,
The ignition detection means is the mode selected by the control means.
Change the ignition detection temperature according to the temperature control temperature
So that, for example mode to burn raw fish of pacific saury, such as a whole,
When there are multiple cooking modes such as the mode of grilling salmon etc. and the mode of grilling chicken, and the temperature control temperature is provided for each cooking mode, the ignition detection means detects the ignition detection temperature for each temperature control temperature. Since each is provided, it is possible to perform a quick and fine ignition detection corresponding to each cooking mode.

According to a second aspect of the present invention, there is provided an informing means for informing the ignition, and when the control means detects that ignition is occurring in the cooking chamber based on the signal input from the ignition detecting means, a predetermined time is reached. Since the heating cooker according to claim 1 is configured to drive and control the informing means after a lapse of time, when the ignition occurs in the cooking cabinet, the control means operates in the cooking cabinet based on a signal input from the ignition detecting means. fire detected by the in heat hand stage causes extinguished within current suppressing cooking chamber to drive the notification means from the extinguished cooking chamber in waiting a predetermined time ignition within the cooking chamber is indicative of the occurrence By making a notification, when the person who uses the device opens the door and confirms the food after the notification, the outside air is sucked into the cooking cabinet, the ignition reappears, and the fire jumps out of the cooking cabinet. Can be prevented

[0018]

EXAMPLES Example 1 Hereinafter, a first example of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 shows a block diagram of a heating cooker according to a first embodiment of the present invention. In this embodiment, those having the same functions as those of the conventional example shown in FIG. 11 or 12 are designated by the same reference numerals and the description thereof will be omitted. The characteristic configuration of this embodiment is as follows.

First, in place of the thermostat 10, a temperature sensor 16 is newly provided, and in a state where the temperature sensor 16 projects from the side surface of the cooking cabinet 1 to the inside, the smoke removing fan 13 moves the air inside the cooking cabinet 1 to the outside of the cooking cabinet 1. It is placed near the exhaust outlet.

Further, the upper and lower heater control means 17 for controlling the energization of the upper heater 2 and the lower heater 3, and the catalyst heater 12
A catalyst heater control means 18 for controlling energization to the smoke removal fan control means 19 for driving and controlling the smoke removal fan 13 are newly provided.

Further, in place of the timer 9 and the timer switch 15, an input means 20 for inputting a cooking menu, selection of heating power, start or end of cooking, etc. is newly provided, and a light emitting diode (hereinafter referred to as LED) or a liquid crystal. A display unit 2 including a display element (hereinafter, referred to as LCD) and the like, which visually displays a currently selected cooking menu, heating power, being cooked, time until cooking is completed, and the like.
1, a buzzer and the like is newly provided with an informing means 22 for audibly informing of confirmation of acceptance of the input means 20, completion of cooking, and notification of an abnormal state of the device.

Further, the temperature detected by the temperature sensor 16 ≧
An ignition detection means 23 for detecting that an ignition has occurred in the cooking cabinet 1 at 260 ° C. and a control means 24 for totally controlling the above-mentioned constituent means are newly provided. Then, the control means 24 starts cooking based on the signal input from the input means 20, controls the display means 21 to display that cooking is in progress, and controls the upper and lower heater control means 17 to control the upper heater 2 and The lower heater 3 is energized, and the catalyst heater control means 1
8 to energize the catalyst heater 12 to control the smoke removing fan control means 19 to drive the smoke removing fan 13.

Further, the control means 24 has a controlled temperature = 230 ° C.
That is, when the temperature detected by the temperature sensor 16 = 230 ° C., the upper / lower heater control means 17 is controlled to energize the upper heater 2 and the lower heater 3 to adjust the temperature in the cooking cabinet 1 to 280 ° C. Further, the control means 24 uses the ignition detection means 23.
When the ignition in the cooking cabinet 1 is detected based on the input signal, the upper and lower heater control means 17 and the catalyst heater control means 18
And the smoke removing fan control means 19 to control the upper heater 2,
The lower heater 3, the catalyst heater 12, and the smoke removal fan 13 are de-energized, and after 1 minute, the display means 21 and the notification means 22 are controlled to cause the person using the equipment to ignite in the cooking cabinet 1. That is to say that the notification is made.

FIG. 2 is a circuit diagram of the heating cooker according to the first embodiment of the present invention. As shown in FIG. 2, the upper and lower heater control means 17 is composed of a relay 17a, a transistor 17b, etc., and the transistor 17b is turned on based on a signal input from the control means 24 to turn on the relay 17a.
To turn on the upper heater 2, the lower heater 3, and the commercial power supply 14.
Is energized to heat the inside of the cooking cabinet 1.

Similarly, the catalyst heater control means 18 also
The transistor 18b includes a relay 18a, a transistor 18b, etc., and is based on a signal input from the control means 24.
Is turned on to turn on the relay 18a to energize the catalyst heater 12 and the commercial power source 14 to heat the catalyst filter 11. Further, the smoke removing fan control means 19 is composed of a triac 19a, a transistor 19b, etc., and the transistor 19b is turned on based on a signal input from the control means 24 to turn on the triac 19a to energize the smoke removing fan 13 and the commercial power supply 14. The smoke removing fan 13 is rotated.

The operation of the heating cooker configured as described above will be described with reference to FIG. FIG. 3 is a diagram for explaining the ignition detection operation with the absolute value of the temperature. Control means 2
4, when cooking is started based on a signal input from the input means 20, the upper and lower heater control means 17, the catalyst heater control means 18 and the smoke removing fan control means 19 are controlled to energize the upper heater 2 and the lower heater 3 and the cooking chamber The inside of 1 is heated, the catalyst heater 12 is heated, and the smoke removing fan 13 is driven to pass smoke and odor generated inside the cooking chamber 1 to the catalyst filter 11 to be removed.

As shown in FIG. 3, the temperature detected by the temperature sensor 16 rises as the temperature inside the cooking cabinet 1 rises, and eventually the temperature detected by the temperature sensor 16 ≧ 2.
When the temperature reaches 30 ° C., the control means 24 controls the upper and lower heater control means 1
7 is controlled to cut off the energization of the upper heater 2 and the lower heater 3. Then, when the temperature inside the cooking cabinet 1 decreases and the temperature detected by the temperature sensor 16 also decreases accordingly, the temperature detected by the temperature sensor 16 becomes <230 ° C., and the control means 24 causes the upper and lower heater control means 17 to operate. Control the upper heater 2
And the lower heater 3 is energized again. By the temperature adjustment control as described above, the temperature inside the cooking cabinet 1 is kept constant.

At this time, when the food in the cooking cabinet 1 ignites and ignition occurs in the cooking cabinet 1, the control means 24 controls the upper and lower heater control means 17 as shown in FIG. Even though the lower heater 3 is de-energized, the temperature inside the cooking cabinet 1 continues to rise, and along with this, the temperature detected by the temperature sensor 16 also rises. Then, the ignition detection means 23 has a temperature detected by the temperature sensor ≧ 260 ° C.
(> Temperature controlled temperature) is detected to detect ignition in the cooking cabinet 1 and a signal is output to the control means 24 (the temperature at which ignition in the cooking cabinet 1 is detected is hereinafter referred to as ignition detection temperature). Then, the control unit 24 controls the catalyst heater control unit 18 and the smoke removal fan control unit 1 based on the signal input from the ignition detection unit 23.
9 is controlled to cut off the energization of the catalyst heater 12 to stop the drive of the smoke removing fan 13, and at the same time, maintain the cutoff of the power supply to the upper heater 2, the lower heater 3, the catalyst heater 12 and the smoke removing fan 13.

With the above-described structure, when the food is ignited in the cooking cabinet 1 during cooking, the control means 24 stops the heating and smoke removing operations in the cooking cabinet 1 to extinguish the food. It is possible to prevent the food from being overbaked any more by maintaining the stop of the heating and smoke removing operations after that to finish the cooking.

The upper heater 2, the lower heater 3,
1 from the stop of energization of the catalyst heater 12 and the smoke removal fan 13
After the lapse of minutes, the control unit 24 controls the display unit 21 and the notification unit 22 to notify that the ignition has occurred in the cooking cabinet 1.

With the above-described structure, the user of the equipment can be informed that the ignition has occurred in the cooking cabinet 1, and the equipment can be informed by notifying the user after the interior of the cooking cabinet 1 is extinguished. Even if the user opens the door to check the food by the notification, it is possible to prevent the fire from jumping out of the cooking cabinet 1. Even in the state where the ignition is detected and the cooking is finished, The control means 24 controls the upper and lower heater control means 1 based on the signal input from the input means 20.
7, the catalyst heater control means 18 and the smoke removal fan control means 19 can be controlled to start energizing the upper heater 2, the lower heater 3, the catalyst heater 12 and the smoke removal fan 13 again.

With the above-mentioned configuration, the user who uses the device takes out the cooked food from the cooking cabinet 1 by the notification that the ignition has occurred in the cooking cabinet 1, and a new cooking product is prepared. When the input means 20 is operated to be installed inside and used again, the control means 24 can restart the heating operation and the smoke removing operation and start cooking again.

Further, the smoke removal fan 13 is stopped after the ignition is detected, so that the flow of air into the cooking cabinet 1 is shut off, the oxygen deficiency state in the cooking cabinet 1 is promoted, and the fire is easily extinguished. Although it is not necessary to stop the smoke removal fan 13 after detection of ignition, even if the smoke removal fan 13 has a configuration in which the energization rate is reduced, the same effect can be obtained although the effect level is different. Since the temperature sensor 16 can be affected by the temperature of the entire cooking cabinet 1 due to the configuration provided near the exhaust port of the cooking cabinet 1, the ignition detecting means 2
3 can detect ignition relatively quickly and reliably even if ignition occurs at a location relatively far from the location where the temperature sensor 16 is installed in the cooking cabinet 1.

Even if the smoke removing fan 13 is not provided, the same effect can be obtained by the above configuration, but the smoke removing fan 13 is provided to forcibly generate the air flow in the cooking cabinet 1. The effect degree is larger.

Further, the difference between the ignition detection temperature and the controlled temperature is 3
Although the temperature is set to 0 ° C., the ignition detection accuracy can be improved by reducing the temperature within a range that does not exceed the overshoot (up to about 10 ° C.) when reaching the controlled temperature or the temperature ripple during the temperature control. .

When the temperature detected by the temperature sensor 16 becomes ≧ 230 ° C., the control means 24 controls the upper and lower heater control means 1.
7 is controlled to cut off the energization of the upper heater 2 and the lower heater 3, but the same effect can be obtained even if the upper heater 2 and the lower heater 3 are turned on / off to reduce the energization rate.

Further, a temperature sensor for detecting the ignition in the cooking cabinet 1 by the ignition detecting means 23, and a temperature sensor for maintaining the temperature in the cooking cabinet 1 at a predetermined temperature by the control means 24 by the temperature adjusting operation. The same effect can be obtained even if they are separately provided, but as shown in this embodiment, the same temperature sensor 16 is used to detect the ignition by the ignition detecting means 23 and the control means 24 performs the temperature adjusting operation. If the configuration is performed, the configuration of the device can be simplified.

(Second Embodiment) A second embodiment of the present invention will be described below with reference to FIGS. 4 and 5. FIG. 4 is a block diagram of the heating cooker according to the second embodiment of the present invention. The difference from the first embodiment is that the control means 24 cooks raw fish such as saury as it is in "raw / figure" mode, "fillet / dried fish" that cooks dried fish such as salmon and fillet, and opening of horse mackerel. Mode, “Tsukeyaki” mode for cooking buri no tsukeyaki or miso soup with straw, “Tori meat” mode for cooking chicken, “Bake eggplant” mode for cooking eggplant, and cooking sweet potato Six "auto cooking" modes of "baked potato" mode and "weak", "medium"
・ There are a total of eight modes: a "manual heating" mode in which cooking is performed for a time set by any of the three "strong" heat powers, and a "standby" mode in which any of the above modes can be selected. Then, the temperature control temperature corresponding to each mode / heat power is provided, and the ignition detection means 23 inputs from the control means 24 which one of the eight modes is selected, and the "standby" mode is excluded. The ignition detection temperature is provided corresponding to the temperature control temperature of the selected mode of the two modes. Table 1 shows the temperature control temperature and the ignition detection temperature in each mode and thermal power except the "standby" mode.

[0039]

[Table 1]

In the first embodiment, for example, "chicken meat"
When ignition occurs in the cooking cabinet 1 while cooking in the mode, the control unit 24 controls the temperature control temperature = 1 as shown in Table 1.
Since the upper heater 2 and the lower heater 3 are energized at 95 ° C, the temperature detected by the temperature sensor 16 is ≥260 ° C.
However, there is a problem in that a considerable amount of time is required until, and the ignition detection by the ignition detection means 23 is delayed, and the extinguishing operation of the control means 24 is delayed.

The present embodiment is intended to solve the above-mentioned problems, and the heating cooker configured as described above is shown in FIG.
The operation will be described using. FIG. 5 is an operation display layout of the heating cooker according to the second embodiment of the present invention.
As shown in FIG. 5, the input means 20 and the display means 21.
Is equipped with a power switch 20a for turning off / on the power and a power LED 21a for displaying the on / off state of the power, and corresponds to the six "auto cooking" modes.
Key 20b and "raw / figured" LED 21b, "fillet / dried fish" key 20c and "fillet / dried fish" LED 21c, "tsukeyaki" key 20d and "tsukeyaki" LED 21d, "chicken meat" key 20e and "chicken meat" An LED 21e, a "baked egg" key 20f and a "baked egg" LED 21f, a "baked potato" key 20g and a "baked potato" LED 21g are provided, respectively.

Further, the display means 21 corresponds to the above three heat powers, "weak" LED 21h, "medium" LED 21i,
A "strong" LED 21j is provided, and the input means 20 has a "fire power selection" key 20 for selecting one of the three heat powers.
equipped with h.

Further, in order to set the time in the "manual heating" mode, the input means 20 is provided with a "down" key 20i for decreasing the set time and an "up" key 20j for increasing the set time.

Further, in the "automatic cooking" mode, the time until the cooking is finished is displayed, and in the "manual heating" mode, the time after the setting is changed is additionally displayed to display the time.
"1" is a "time display" that displays the time as a number from 0 to 30
It has an LED 21k.

As a method of using the device, first, a person who uses the device turns on the power switch 20a to bring the device into a usable state. At this time, the control means 24 detects that the power switch 20a is turned on, shifts to the "standby" mode, turns on the power LED 21a and keeps the other LEDs 21b to 21k off, and the keys 20b to 2b.
Enables reception of 0j.

Then, for example, when the person who uses the equipment wants to grill and cook the saury entirely, the saury is installed on the grill 5 in the cooking cabinet 1, the door is closed, and the "raw / appearance" of FIG. When the "baking" key 20b is operated, the control means 24 causes "raw /
The operation mode of the equipment is changed to the "raw / figure grill" mode by inputting that the "figure grill" key 20b has been operated, the "raw / figure grill" LED 21b is turned on, and the catalyst heater control means 18 and smoke removal are performed. The fan control unit 19 is controlled to energize the catalyst heater 12 and the smoke removing fan 13, and the upper and lower heater control unit 17 is controlled to control temperature = 23 shown in Table 1.
The upper heater 2 and the lower heater 3 are on / off controlled at 0 ° C. to heat and cook the saury in the cooking cabinet 1.

When the saury inside the cooking cabinet 1 is ignited, the ignition detecting means 23 detects the temperature detected by the temperature sensor 16 and the ignition detection temperature in the cooking cabinet 1 shown in Table 1 is 260 ° C. An ignition is detected and a signal is output, and the control means 24 controls the upper and lower heater control means 17, the catalyst heater control means 18 and the smoke removal fan control means 19 based on the signal input from the ignition detection means 23 to control the upper heater 2 and the lower heater. The electricity to the heater 3, the catalyst heater 12 and the smoke removing fan 13 is cut off and maintained thereafter to extinguish the saury inside the cooking cabinet 1 and the cooking is completed.

Further, for example, when it is desired to heat and cook chicken thigh meat, when the "chicken meat" key 20e of FIG. 5 is operated, the control means 24 inputs that the "chicken meat" key 20e has been operated, and the control means 24 The operation mode is changed to the "meat" mode, the "meat" LED 21e is turned on, and the catalyst heater control means 18 and the smoke removal fan control means 19 are controlled to energize the catalyst heater 12 and the smoke removal fan 13. The upper / lower heater control means 17 is controlled to control the on / off of the upper heater 2 and the lower heater 3 at the temperature control temperature = 195 ° C. shown in Table 1 to heat and cook chicken thigh meat in the cooking cabinet 1.

When the chicken thigh meat in the cooking cabinet 1 is ignited, the ignition detection means 23 detects the temperature detected by the temperature sensor 16 and the ignition detection temperature shown in Table 1 is 225 ° C.
Detects the ignition in the cooking cabinet 1 and outputs a signal, and the control means 24 controls the upper and lower heater control means 17, the catalyst heater control means 18 and the smoke removal fan control means 19 based on the signal input from the ignition detection means 23. Then, the upper heater 2, the lower heater 3, the catalyst heater 12 and the smoke removing fan 13 are de-energized and maintained thereafter to extinguish the chicken thigh meat in the cooking cabinet 1 and finish the cooking.

With the above-described structure, the ignition detection temperature for detecting the ignition in the cooking chamber 1 by the ignition detection means 23 is changed according to the temperature control temperature in the mode selected by the control means 24. Accordingly, it is possible to more quickly detect the ignition in the cooking cabinet 1 according to the food and the cooking contents in the cooking cabinet 1.

Although the ignition detection temperature 23 has a temperature higher than the temperature control temperature of the control means 24 by the same margin (30 ° C.) as the ignition detection temperature, the ignition detection temperature 23 has a different margin for each temperature control temperature. The same effect can be obtained as the detection temperature.

(Embodiment 3) A third embodiment of the present invention will be described below with reference to FIG. The difference from the first embodiment is that the ignition detection means 23
However, in addition to detecting the ignition in the cooking cabinet 1 when the temperature detected by the temperature sensor 16 is ≧ 260 ° C., the time elapsed until the temperature detected by the temperature sensor 16 increases by 2 ° C. is measured as ΔT, When ΔT <1.0 seconds is repeated three times, it is detected that ignition has occurred in the cooking cabinet 1.

In the first embodiment, for example, when the oil accumulated in the pan 4 or the oil smoke filled in the cooking cabinet 1 ignites and ignites at a temperature detected by the temperature sensor 16 = 200 ° C., the temperature sensor 16 Although the detected temperature rises with a very steep temperature rising gradient, the ignition detecting means 23 can detect the ignition until the temperature detected by the temperature sensor 16 becomes ≧ 260 ° C., and the extinguishing operation by the control means 24 is delayed. Will end up.

Therefore, in order to prevent the above-described ignition state, if water is put in the pan 4 to prevent the pan 4 from igniting and the cooking cabinet 1 to be filled with oil smoke, the cooked food is heated and cooked next time. There is a problem that the water put in the saucer 4 fills the inside of the cooking chamber 1 with water vapor, and when the raw fish is baked, the fishy odor remains, or the cooked food becomes dull without being crispy.

This embodiment is intended to solve the above-mentioned problems, and the heating cooker configured as described above is shown in FIG.
The operation will be described using. FIG. 6 is a diagram for explaining the ignition detection operation based on the temperature rising gradient. As shown in FIG. 6, when a food material containing a large amount of fat components, such as saury and chicken, is cooked, the fat contained in the food material drops during cooking and accumulates in the saucer 4 provided at the bottom. When continuous cooking is performed in this state, the upper heater 2 and the lower heater 3 heat the food on the grill 5 and also heat the fat accumulated on the pan 4 to raise the temperature of the fat and turn into oil smoke. Te cookery 1
Fills in.

Even when the temperature detected by the temperature sensor 16 is a relatively low temperature of about 200 ° C., the oil dripping from the food comes into contact with the lower heater 3 and ignites, and the ignited oil drips onto the saucer 4. The whole fat accumulated in the saucer 4 catches fire,
Eventually, it may lead to ignition of the oil smoke filled in the cooking cabinet 1. In such a case, as shown in FIG. 6, ΔT, which is the time elapsed until the temperature detected by the temperature sensor 16 rises by 2 ° C., has a steep rising gradient of 0.2 seconds or less. Then, the ignition detection means 23 has ΔT <
When it detects that 1.0 second continues three times, it immediately controls the upper and lower heater control means 17 to stop energization of the upper heater 2 and the lower heater 3 to stop the heating operation, and the catalyst heater control means 18
And the smoke removing fan control means 19 to control the catalyst heater 12
And the smoke removal fan 13 is de-energized to stop the smoke removal operation and extinguish the interior of the cooking cabinet 1.

Then, the upper heater 2, the lower heater 3,
1 from the stop of energization of the catalyst heater 12 and the smoke removal fan 13
After the lapse of minutes, the control unit 24 controls the display unit 21 and the notification unit 22 to notify that the ignition has occurred in the cooking cabinet 1, and the person who uses the device is informed of the ignition in the cooking cabinet 1. Then, display that heating has stopped.

With the above-mentioned structure, the oil in the cooking cabinet 1 is ignited with a steep temperature rising gradient in a relatively low temperature state such as ignition of fat accumulated in the pan 4 and oil smoke filled in the cooking cabinet 1. In this case, the ignition detection means 23 instantaneously detects the ignition, and the control means 24 quickly stops the heating of the cooking cabinet 1 to extinguish the fire to suppress the temperature rise in the outer casing of the equipment and the display means 21 one minute later. Also, the notification means 22 can notify that the ignition has occurred in the cooking cabinet 1 and prompt the user to perform maintenance such as washing away the fat accumulated in the saucer 4.

Although the ignition detection means 23 measures the time elapsed until the temperature rises by the unit temperature and uses it as the temperature rise gradient, the same effect can be obtained by measuring the temperature rise per unit time and using the temperature rise gradient. Obtainable.

In addition, the cooking detector 1 is once used by the ignition detecting means 23.
When the internal ignition is detected, the control means 24 keeps the energization of the upper heater 2, the lower heater 3, the catalyst heater 12 and the smoke removing fan 13 stopped even if the temperature detected by the temperature sensor 16 decreases thereafter. .

With the above-described structure, after the heating is stopped to extinguish the interior of the cooking cabinet 1, the heating and smoke removing operations are maintained stopped, and the cooking cabinet 1 is again heated by the reheating or smoke removing operation. Ignition can be prevented from occurring.

When the control means 24 detects ignition in the cooking cabinet 1 based on the signal input from the ignition detection means 23, it immediately activates the upper and lower heater control means 17, the catalyst heater control means 18, and the smoke removal fan control means 19. The upper heater 2, the lower heater 3, the catalyst heater 12, and the smoke removing fan 1 are controlled to be controlled.
3 to the upper heater 2, the lower heater 3, the catalyst heater 12 and the smoke removing fan 13 again without shutting off the power supply to the heater 3 and without changing the display content on the display means 21 and driving the notification means 22 one minute later. It is also possible to adopt a configuration in which energization is started.

With the above-mentioned structure, the control means 24 heats the cooked food while extinguishing the ignition generated in the cooking cabinet 1 without putting water in the saucer 4, so that the saury or the like is not smelled. It can be baked crisply.

(Embodiment 4) Hereinafter, a fourth embodiment of the present invention will be described with reference to FIG. The difference from the third embodiment is that the ignition detection means 23
Holds the immediately preceding stable ΔT as the previous temperature rise gradient data, and ΔT <the previous temperature rise gradient data ×
When 0.5 is detected three times in succession, it is detected that ignition has occurred in the cooking cabinet 1.

In the third embodiment, for example, when a swelled rice cake comes into contact with the upper heater 2 and ignites during the baking of rice cake, ΔT = when the temperature detected by the temperature sensor 16 is relatively low.
The temperature rises with a rising gradient of 2 to 3 seconds, and the ignition detecting means 23
In the temperature rise gradient, the ignition cannot be detected, and the ignition can be detected only when the temperature detected by the temperature sensor ≧ 260 ° C., the ignition detection by the ignition detection means 23 is delayed, and the extinguishing operation of the control means 24 is delayed.

Further, in order to detect the ignition even in the above phenomenon, the ignition detecting means 23 is changed to detect ΔT> 3.0 seconds (1.0 seconds in the third embodiment) three times in succession. Then, when cooking is performed in a state where the inside of the cooking cabinet 1 is empty, the temperature rises with a rising gradient of ΔT = 2.0 seconds at a commercial power supply voltage = AC110V, and the ignition detection means 23 erroneously detects ignition. There is a problem.

The present embodiment is intended to solve the above-mentioned problems, and the heating cooker configured as described above is shown in FIG.
The operation will be described with reference to FIG. FIG. 7 is a diagram for explaining the ignition detection operation due to the change in the rising gradient of the temperature.

FIG. 8 is a flow chart showing the ignition detecting operation based on the temperature rise gradient of the ignition detecting means 23 in the fourth embodiment. As shown in FIG. 8, the ignition detection means 23 measures, as ΔT, the time elapsed until the temperature θ detected by the temperature sensor 16 increases by 2 ° C., and temperature data serving as a reference for comparing whether or not the temperature has increased. Is held as θb, the immediately preceding ΔT is held as ΔTx, and the temperature rise gradient data serving as a reference for ignition detection is held as ΔTb.
A counter for counting Tb> ΔT three times is provided.
Then, the ignition detection means 23, at the time of starting the operation, in step 2, counter = 0, θb = current temperature sensor 1
It is initialized to the temperature θ detected in 6.

Then, when it is detected that the temperature θ detected by the temperature sensor 16 increases by 2 ° C. by comparing with θb in step 3, θb = θb + 2.0 is updated in step 4, and from step 5 ΔT in step 9
When (n) ≦ ΔT (n + 1) ≦ ΔT (n + 2) is satisfied,
In step 11, ΔTb = ΔT (n + 1) × 0.5 is created. This is to eliminate the fluctuation of the temperature θ detected by the temperature sensor 16 and create ΔTb in a stable portion.

Now, when the rice cake is placed on the grill 5 and installed in the cooking cabinet 1 to start heating, as shown in FIG. 7, the temperature θ detected by the temperature sensor 16 is ΔT = about 5.0 seconds. To rise. Here, as shown in FIG. 8, the ignition detection means 23 holds ΔTb = 5.0 seconds × 0.5 = 2.5 seconds in step 11 as the previous temperature rise gradient data.

Then, the heated rice cake bulges upward,
When the rice cake is ignited by coming into contact with the upper heater 2 in time, the rising gradient of the temperature θ detected by the temperature sensor 16 becomes steep and rises in about ΔT = 2.0 seconds as shown in FIG. 7. Here, as shown in FIG.
From step 5 to step 17, ΔTb (= 2.5 seconds)> ΔT
When (= 2.0 seconds) is detected three times in succession and ignition in the cooking cabinet 1 is detected, the process proceeds to ignition detection processing and a signal indicating that ignition has occurred in the cooking cabinet 1 is output to the control means 24. To do. Then, the control means 24 controls the upper and lower heater control means 17, the catalyst heater control means 18 and the smoke removal fan control means 19 based on the signal input from the ignition detection means 23 to stop the energization of the upper heater 2 and the lower heater 3. Stop heating operation,
The catalyst heater 12 and the smoke removing fan 13 are de-energized to stop the smoke removing operation.

When heating is started with the interior of the cooking cabinet 1 empty, the temperature θ detected by the temperature sensor 16 is ΔT =
It rises in about 3.0 seconds, and the ignition detection means 23 holds ΔTb = 3.0 seconds × 0.5 = 1.5 seconds in step 11 of FIG. Therefore, ΔTb (= 1.5 seconds) <ΔT (=
3.0 seconds), so step 1 in step 15 of FIG.
It branches to 8 and does not erroneously detect ignition.

With the above configuration, even if the cooking cabinet 1 is emptied and heated, no accidental ignition is detected.
Even if the temperature detected by the temperature sensor 16 such that the rice cake is swollen and comes into contact with the upper heater 2 to ignite is relatively low and the temperature rise gradient is relatively gentle, the ignition detection means 23
Can accurately detect the ignition in the cooking cabinet 1 and the control means 24 can perform the extinguishing operation.

It should be noted that the ignition detection means 23 uses the step 10
ΔTb is compared with ΔT (n + 1) × 0.5 at
If ≧ ΔT (n + 1) × 0.5, the process branches to step 12 and ΔTb is not updated.

With the above configuration, the ignition detecting means 2
3 is the gentlest temperature rise gradient data from the start of operation Δ
By holding as Tb, the control means 24 can quickly extinguish the inside of the cooking cabinet 1 by more sensitively detecting the ignition that occurs in the cooking cabinet 1.

Further, the ignition detecting means 23 uses the step 12
.DELTA.Tb is compared with 4.0 seconds, and if .DELTA.Tb> 4.0 seconds, .DELTA.Tb = 4.0 seconds is set in step 13.

With the above structure, the temperature sensor 16
It is possible to prevent erroneous ignition detection due to an extremely large value of ΔTb due to an excessive fluctuation of the temperature θ detected by. In addition, this numerical value of 4.0 seconds is 1
The value should be as small as possible based on the temperature rise gradient when the cooked food is ignited.

Further, the ignition detecting means 23 is initialized to ΔTb = 1.0 seconds in step 1 when starting the operation.

With the above-described structure, even if ignition occurs in the cooking cabinet 1 between the start of heating and the production of ΔTb, the fat accumulated in the pan 4 is ignited and the temperature is suddenly increased. If the ignition is accompanied by a rise, the ignition detection means 23 detects the ignition based on ΔTb = 1.0 second and the control means 2
4 can perform a fire extinguishing operation.

Although the ignition detecting means 23 detects the change in the time elapsed until the temperature rises by the unit temperature to detect the ignition, it detects the change in the temperature rise per unit time and detects the temperature rise gradient. The same effect can be obtained even if the change is detected and the ignition is detected.

(Embodiment 5) A fifth embodiment of the present invention will be described below with reference to FIG. The difference from the fourth embodiment is that the ignition detection means 23
However, it detects that the temperature θ detected by the temperature sensor 16 has dropped by 4 ° C. or more, updates the temperature data that is the comparison reference for temperature increase, and initializes the previously held temperature increase gradient data and fires. That is, the detection operation is restarted from the beginning, and the update of the previously held temperature rise gradient data is prohibited for one minute after the temperature decrease is detected.

In the fourth embodiment, for example, when the inside of the cooking cabinet 1 is preheated and the inside of the cooking cabinet 1 becomes high temperature, the door is opened and the food is placed on the grill 5. After that, when the door is closed and cooking is performed, as shown in FIG.
There is a problem in that the temperature θ detected in 6 decreases when the door is opened, and the ignition detection means 23 creates ΔTb to a large value and erroneously detects ignition.

The present embodiment is intended to solve the above-mentioned problems, and the heating cooker configured as described above is shown in FIG.
The operation will be described using 0. FIG. 10 is a flow chart showing the temperature decrease detection and the ignition detection operation based on the temperature increase gradient of the ignition detection means 23 in the fifth embodiment.

The components having the same functions as those of the fourth embodiment shown in FIG. 8 are designated by the same reference numerals and the description thereof will be omitted. The characteristic configuration of the present embodiment is that the ignition detection means 23 includes a temperature sensor 16
A decrease flag is provided as a flag indicating the detection of decrease in the temperature θ detected in step 1. When the operation is started, the decrease flag = 0 is set in step 19. When the temperature θ detected by the temperature sensor 16 is detected to decrease by 4 ° C. in step 20, the decrease flag is set to 1 in step 21, and the process proceeds to step 1 to initialize ΔTb = 1.0 second. Fire detection operation again from the beginning.

With the above configuration, even if the door is opened and closed while the interior of the cooking cabinet 1 is being heated, the ignition detection means 23 detects the temperature decrease and restarts the ignition detection operation from the beginning, so after the door is closed. It is possible to prevent accidental ignition detection.

In addition, in step 23, a decrease flag =
Since it is cleared to 0, for one minute after the temperature drop is confirmed, the flow goes to step 24 from the drop flag = 1 and step 10
Therefore, ΔTb creation and update processing in step 13 are not performed.

With the above configuration, the ignition detecting means 2
3 is the temperature θ detected by the temperature sensor 16 immediately after the door is closed
It is possible to prevent ΔTb from being created based on a portion where the rising gradient of is extremely gentle and thus erroneously detect ignition.

(Embodiment 6) A sixth embodiment of the present invention will be described below with reference to FIG. The characteristic configuration of the present embodiment is the ignition detection means 2
3 has a function of detecting ignition by the absolute value of the temperature θ such as the temperature θ ≧ 260 ° C. detected by the temperature sensor 16 as shown in the first embodiment, and ΔT <1.
It also has a function of detecting ignition at the rising gradient of temperature θ, such as three consecutive detections of 0 seconds. And the control means 24
Is the temperature θ based on the signal input from the ignition detection means 23.
When the ignition is detected at the rising gradient of 1, the energization of the upper heater 2, the lower heater 3, the catalyst heater 12 and the smoke removing fan 13 is stopped, and 1 minute later, the upper heater 2, the lower heater 3, the catalyst heater 12 and the removing heater are removed again. The electricity to the smoke fan 13 is restarted.

Further, the control means 24 includes the ignition detection means 23.
When ignition is detected by the absolute value of the temperature θ based on the input signal from the upper heater 2, the lower heater 3, the catalyst heater 12
The smoke removal fan 13 is deenergized and maintained, and one minute later, the display means 21 and the notification means 22 are controlled to notify that ignition has occurred in the cooking cabinet 1.

When the fat accumulated in the saucer 4 or the oil smoke filled in the cooking cabinet 1 ignites and ignites, it is necessary to immediately stop heating to extinguish the cooking cabinet 1 by extinguishing the fire.
The food items installed inside may not be sufficiently baked. In this case, since the temperature θ detected by the temperature sensor 16 rises with a very steep temperature rising gradient, the ignition detection means 23 detects the temperature θ such that ΔT <1.0 seconds is detected three times continuously.
The ignition means detects the ignition at an ascending slope, and the control means 24 stops the energization of the upper heater 2, the lower heater 3, the catalyst heater 12 and the smoke removing fan 13 based on the signal input from the ignition detection means 23, and one minute later, the upper heater is turned on again. The energization of the heater 2, the lower heater 3, the catalyst heater 12 and the smoke removing fan 13 is restarted,
No notification is given by the display means 21 and the notification means 22.

With the above structure, when the saury or the like is cooked and the fat accumulated in the pan 4 or the oil smoke filled in the cooking cabinet 1 is ignited and ignited, the ignition in the cooking cabinet 1 is detected. To stop heating and smoke removal operations for 1 minute to extinguish the inside of the cooking cabinet 1, and to restart heating and smoke removal operations without notification after 1 minute, to give a feeling of strangeness to the person using the device. You can restart cooking without. Therefore, even if the saucer 4 is not filled with water, the food to be cooked can be cooked while extinguishing the ignition that occurs in the cooking cabinet 1, and the saury or the like can be baked without a fishy odor.

When the food in the cooking cabinet 1 comes into contact with the upper heater 2 or the lower heater 3 and is overheated and a part of the food is ignited, the food is too hot to cook. Need to finish. In this case, the temperature sensor 1
Since the temperature θ detected in 6 rises with a relatively gentle rising gradient, the ignition detection means 23 detects ignition with the absolute value of the temperature θ such that θ ≧ 260 ° C., and the control means 24 inputs from the ignition detection means 23. Based on the signal, the upper heater 2, the lower heater 3, the catalyst heater 12 and the smoke removing fan 13 are de-energized and maintained, and one minute later, "U11" is displayed on the "time display" LED 21k of the display means 21 shown in FIG. Then, the notification means 22 notifies that the ignition has occurred in the cooking cabinet 1.

With the above configuration, when the cooked food itself ignites, the heating and smoke removal operations are stopped immediately after the ignition of the cooked food in the cooking cabinet 1 is detected to extinguish the fire in the cooking cabinet 1. At the same time, when the extinguishing of the fire in the cooking cabinet 1 after 1 minute has become certain, it is possible to give a notification that the food is ignited and the cooking is completed.

In the sixth embodiment, the stop time of the heating and smoke removing operations when the ignition is detected at the rising gradient of the temperature, and the heating and smoke removing stop when the ignition is detected at the absolute value of the temperature to the notification. Although the standby time is set to 1 minute, the time required for extinguishing the fire is less than 10 seconds, and any time longer than this may be the same or different.

Further, in the first to sixth embodiments, it is obvious that a part or all of the ignition detecting means 23 or the control means 24 can be constituted by a microcomputer.

[0096]

As described above, according to the first aspect of the present invention, when ignition occurs in the cooking chamber, the heating means is de-energized to extinguish the food in the cooking chamber to the heating means. Keeping the power off to prevent cooking from being damaged further, and the person using the device should take out the cooked food and install it in the cooking cabinet again. When the input means is operated to start heating, heating can be restarted and cooking can be performed without separately repairing the device.

[0097] When equipped with a temperature control temperature to each cooking mode each have a cooking mode multiple, rapid and corresponding to the cooking mode each comprise a temperature of ignition detecting for each regulated temperature Fine fire detection can be performed.

[0098] Furthermore, according to the second aspect of the present invention, fire detection to heated hand stage causes extinguished within current suppressing the cooking chamber and in the cooking chamber, extinguished in the cooking chamber and waits for a predetermined time It becomes possible to give a notification that the ignition has occurred in the cooking cabinet after the fact that the above has become certain.

[Brief description of drawings]

FIG. 1 is a block diagram of a heating cooker according to first and third to sixth embodiments of the present invention.

FIG. 2 is a circuit configuration diagram of the heating cooker according to the first embodiment of the present invention.

FIG. 3 is a diagram for explaining an ignition detection operation with an absolute temperature value in the heating cooker.

FIG. 4 is a block diagram of a heating cooker according to a second embodiment of the present invention.

FIG. 5 is a diagram showing an operation display layout in the heating cooker.

FIG. 6 is a diagram for explaining an ignition detection operation based on a temperature rise gradient according to the third embodiment of the present invention.

FIG. 7 is a diagram for explaining an ignition detection operation according to a change in temperature rise gradient according to the fourth embodiment of the present invention.

FIG. 8 is a flowchart showing an ignition detection operation based on a change in temperature rise gradient of the ignition detection means.

FIG. 9 is a diagram for explaining a temperature drop detecting operation in the fifth embodiment of the present invention.

FIG. 10 is a flow chart showing an ignition detection operation based on a change in the temperature drop detection and the temperature rise gradient of the ignition detection means.

FIG. 11 is a configuration diagram of a heating cooker in a conventional configuration.

FIG. 12 is a circuit configuration diagram of a heating cooker in a conventional configuration.

[Explanation of symbols]

1 cooking cabinet 2 Upper heater 3 Lower heater 11 Catalyst filter 12 catalyst heater 13 smoke removal fan 16 Temperature sensor 20 Input means 21 display means 22 Notification means 23 Fire detection means 24 Control means

─────────────────────────────────────────────────── --Continued from the front page (56) References JP-A-5-172343 (JP, A) JP-A-7-174345 (JP, A) JP-A-8-145368 (JP, A) Actual Kaihei 6- 48541 (JP, U) (58) Fields surveyed (Int.Cl. ⁷ , DB name) A47J 37/06 F24C 7/04

Claims (2)

(57) [Claims] 1. A heating means for heating a food in a cooking cabinet, a temperature sensor for detecting a temperature in the cooking cabinet, an inputting means for inputting a start of cooking, and a temperature detected by the temperature sensor are set in advance. Ignition detection means for detecting that ignition is occurring in the cooking cabinet because it is higher than the set ignition detection temperature, a signal input from the temperature sensor, and a temperature control temperature lower than the ignition detection temperature. To control the energization to the heating means, and to cut off the energization to the heating means based on the signal input from the ignition detection means and maintain it thereafter, and to the heating means based on the signal input from the input means. and control means resumes the energization,
The control means has a plurality of modes and each mode
The ignition control means is provided with each of the temperature control temperatures.
Is the temperature in the mode selected by the control means.
A heating cooker that changes the ignition detection temperature according to the temperature control . 2. An informing means for informing an ignition is provided, and when the control means detects that an ignition is occurring in the cooking chamber based on a signal inputted from the ignition detecting means, the informing means is provided after a predetermined time has elapsed. Claims configured to drive and control the
The heating cooker according to 1 .