JP2001087141A - Heat cooking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To put out a fire in a housing of a heat cooking device by detecting the ignition in the housing and stopping a heating or smoke removing operation. SOLUTION: This heat cooking device puts out the fire in the housing 1 when an ignition detecting means 20 detects the ignition in the housing 1 in accordance with the absolute value or rising gradient of the temperature detected by a temperature sensor 13 and when a control means 21 stops the energization of an upper heater 2, lower heater 3, catalyst heater 9 and smoke removing heater 10 in accordance with the signal inputted from the ignition detecting means 20. The device announces a person using the apparatus to the effect that the firing arises in the housing by controlling a display means 18 and an alarming means 19 upon lapse of one minute thereafter.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooking device used in ordinary households.

[0002]

2. Description of the Related Art A conventional heating cooker will be described below with reference to FIGS. FIG. 11 is a configuration diagram of a conventional heating cooker. In FIG. 11, reference numeral 1 denotes a cooking cabinet for storing food, 2 denotes an upper heater for heating the food in the cooking cabinet 1 from above, 3 denotes a lower heater for heating the cooking in the cooking cabinet 1 from below, and 4 denotes The receiving tray is provided below the lower heater 3 and receives grease and the like dripped from cooked food. Reference numeral 5 denotes a grill, which is installed on the saucer 4 so that the food in the cooking cabinet 1 can be installed between the upper heater 2 and the lower heater 3. Reference numeral 6 denotes a handle, 7 denotes a glass window, 8 denotes packing, and a door is formed together with the tray 4. A user of the device can take the grip, move it back and forth, open and close the door, and put the food into and out of the cooking cabinet 1. At the same time, the user looks into the glass window 7 and checks the condition of the cooked food. In addition, the packing 8 closes the gap between the door and the product housing to increase the confidentiality in the cooking cabinet 1, and prevents the smoke generated from the cooked food during the heating cooking and the hot air in the cooking cabinet 1 from leaking from the gap. prevent. Reference numeral 9 denotes a timer which can be rotated clockwise, and is configured to set a time corresponding to the rotation angle. Reference numeral 10 denotes a thermostat which is installed on the side of the cooking cabinet 1 and operates at a predetermined temperature (280 ° C.). Numeral 11 denotes a catalyst filter that passes through and removes smoke and smell generated in the cooking cabinet 1.
Reference numeral 12 denotes a catalyst heater that heats the catalyst filter 11 to enhance the catalytic action. Reference numeral 13 denotes a smoke removing fan that generates a flow of air that allows smoke and smell 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 the food 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 rises in temperature. When the temperature of the inside of the cooking cabinet 1 becomes 280 ° C. or more, the thermostat 10 is activated and the upper heater 2 and the lower heater 3 are commercialized. Power supply to the power supply 14 is cut off. By this operation, the internal temperature of the cooking cabinet 1 is maintained at a predetermined temperature.

[0004]

However, according to the above-mentioned conventional construction, when a food placed on the grill 5 is ignited while cooking foods having a high fat content, such as fish and chicken, such as saury and herring, the cooking chamber is opened. Although the inside of the thermostat 1 has been ignited and the food has been over-burned, the thermostat 1 remains until the time set by the timer 9 elapses.
By the action of 0, the heating in the cooking chamber 1 is continued by the upper heater 2 and the lower heater 3, and the food is damaged.

[0005] In addition, when cooking a foodstuff containing a large amount of fat and continuously heating and cooking new foodstuffs in a state in which the fat dropped from the 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 receiving pan 4 or the oil smoke filled in the cooking chamber 1 is ignited and the cooking chamber 1
In some cases, the inside may be ignited. In this case, extra time is required until the thermostat 10 operates and the upper heater 2 and the lower heater 3 are de-energized, so that the temperature of the outer casing of the device becomes excessively high.

Therefore, in order to prevent the above-mentioned ignition condition, water is poured into the saucer 4 to prevent the saucer 4 from being ignited and the cooking chamber 1 from being filled with oily smoke. The water put in the saucer 4 therein becomes steam and fills the inside of the cooking cabinet 1, leaving a fresh smell when the raw fish is baked, or the food becomes moist without being burnt.

[0007] Further, the smoke removing fan 13 is driven to drive the cooking cabinet 1.
In the case of removing smoke and smell generated in the inside, the smoke removing fan 13 is driven even if the inside of the cooking cabinet 1 is ignited and the thermostat 10 is operated and the upper heater 2 and the lower heater 3 are turned off. As a result, a flow of air is generated inside the cooking cabinet 1 and it is difficult to extinguish the fire.

Further, when a temperature fuse is provided on the wall surface of the cooking chamber 1 and 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 broken.
2. In the configuration in which the energization of 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 unless the thermal fuse is replaced or repaired thereafter. 3. There was a problem that any or all of the catalyst heater 12 and the smoke removing fan 13 could not be energized and cooking could not be newly performed.

An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to detect the ignition of a cooked food, end the cooking, and make the equipment reusable without repairing separately.

It is still another object of the present invention to set an ignition detection temperature corresponding to each of the plurality of controlled temperatures when the plurality of controlled temperatures are provided.

It is another object of the present invention to detect an ignition in the cooking cabinet when the temperature in the cooking cabinet is lower than the temperature regulation temperature, to stop the heating operation, and to allow cooking without putting water in the saucer.

It is still another object of the present invention to detect a temperature drop and initialize and restart the ignition detection operation.

It is another object of the present invention to stop the smoke removing operation in addition to the heating operation when the ignition in the cooking cabinet is detected in the case of having a smoke removing function.

It is another object of the present invention to notify that ignition has occurred after stopping heating and extinguishing the fire.

It is another object of the present invention to discriminate between ignition of cooked food and ignition of oil dripping and accumulating in a saucer or oil smoke filled in a cooking chamber.

[0016]

In order to solve the above-mentioned problems, a heating cooker according to the present invention comprises a heating means for heating a food in a cooking chamber, a temperature sensor for detecting a temperature in the cooking chamber, Input means for inputting the start of cooking, and ignition detection means for detecting that ignition has occurred in the cooking chamber by the temperature detected by the temperature sensor being higher than a preset ignition detection temperature, The power supply to the heating means is controlled based on the relationship between the signal input from the temperature sensor and the temperature regulation temperature lower than the ignition detection temperature, and the power supply to the heating means is performed based on the signal input from the ignition detection means. A control means is provided for shutting off and maintaining thereafter, and for re-energizing the heating means based on a signal input from the input means.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 includes heating means for heating a food in a cooking cabinet, a temperature sensor for detecting a temperature in the cooking cabinet, and input means for inputting a start of cooking. An ignition detection means for detecting that an ignition has occurred in the cooking chamber by a temperature detected by the temperature sensor being higher than a preset ignition detection temperature, a signal input from the temperature sensor, and Control the energization to the heating means according to the relationship with the temperature control temperature lower than the ignition detection temperature,
And a heating cooker having control means for interrupting the power supply to the heating means based on a signal input from the ignition detection means, maintaining the power supply thereafter, and restarting power supply to the heating means based on a signal input from the input means. And so
For example, when the food is ignited in the cooking chamber when the control means controls the energization of the heating means in a state where the temperature detected by the temperature sensor is close to the temperature control temperature, the cooking chamber has the following operation. Put out the fire and finish cooking,
It is possible to prevent the heating means from being energized again to damage the food.

That is, when the food in the cooking chamber ignites in the above-mentioned state, the temperature in the cooking chamber rises, the temperature detected by the temperature sensor becomes higher than the temperature regulation temperature, and the control means controls the heating means. Although the energization is cut off, the food does not extinguish for a while and the temperature detected by the temperature sensor continues to rise.
Then, in time, the ignition detection means detects that the ignition has occurred in the cooking chamber from the fact that the temperature detected by the temperature sensor is higher than the ignition detection temperature, and the control means 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, the control means cuts off the power supply to the heating means based on the signal input from the ignition detection means, maintains the power supply thereafter, and restarts the power supply to the heating means based on the signal input from the input means. After the food is ignited and the cooking is completed, the user of the appliance takes out the ignited food, operates the input means to newly install the food in the cooking cabinet and cook again, Unlike the case where the control means resumes energization of the heating means and the energization of the heating means is interrupted by the thermal fuse, cooking can be performed again after the ignition detection operation without separately repairing the equipment.

According to a second aspect of the present invention, the control means includes a plurality of the controlled temperatures, and the ignition detecting means includes the detected firing temperatures for the plurality of controlled temperatures. Since the cooking device according to item 1 is used, there are a plurality of cooking modes such as a mode for baking raw fish such as saury, a mode for baking cuts such as salmon, and a mode for baking chicken. When the temperature is provided, the ignition detection means has an ignition detection temperature for each temperature regulation temperature, so that quick and detailed ignition detection corresponding to each cooking mode can be performed.

According to a third aspect of the present invention, there is provided a heating means for heating the food in the cooking chamber, a temperature sensor for detecting a temperature in the cooking chamber, and a temperature rising gradient detected by the temperature sensor. Since it is a heating cooker provided with ignition detection means for detecting that ignition has occurred in the cooking chamber and control means for suppressing energization to the heating means based on a signal input from the ignition detection means, For example, in a configuration in which a saucer or the like is provided below the food to receive fat or the like dripped from the food, the temperature sensor detects if the oil accumulated in the saucer or the oil smoke filled in the cooking chamber ignites and ignites. Even if the temperature to be controlled is lower than the temperature control temperature, the temperature rises sharply, so that the ignition detecting means detects that ignition has occurred in the cooking chamber based on the temperature rise gradient detected by the temperature sensor, and the control means Fires By suppressing the power supply to the heating means based on the signal input from the informing means, the heating in the cooking cabinet is stopped or the firepower is reduced by reducing the heating power more quickly than in the invention of claim 1, thereby causing the ignition in the cooking cabinet. It is possible to suppress a rise in the temperature of the outer casing of the device or the like. Further, in addition to the above, if the electric conduction rate of the heating means is increased again after the inside of the cooking cabinet is extinguished, the cooking product can be extinguished while extinguishing the ignition generated in the cooking cabinet without filling the saucer with water. Can be cooked and the food can be baked quickly without smell.

According to a fourth aspect of the present invention, the ignition detecting means comprises:
The heating cooker according to claim 3, wherein the temperature rise gradient detected by the temperature sensor is steeper than a predetermined value, so that the ignition is detected. Heating in the cooking cabinet can be stopped to extinguish the fire.

According to a fifth aspect of the present invention, the ignition detecting means includes:
A structure in which a temperature rise gradient previously detected by the temperature sensor is held, and ignition is detected when the temperature rise gradient detected by the temperature sensor this time is steeper than a predetermined ratio with respect to the held temperature rise gradient. Since the heating cooker according to 3 is used, the ignition detecting means detects a change in the temperature rise gradient detected by the temperature sensor and detects ignition in the cooking chamber. Even if the temperature rises sharply, the ignition in the cooking chamber can be detected more quickly than the invention according to the fourth aspect without erroneously detecting the ignition.

According to a sixth aspect of the present invention, the ignition detecting means comprises:
6. The heating cooker according to claim 5, wherein the temperature rising gradient to be held is not larger than a predetermined value, so that the temperature detected by the temperature sensor due to opening / closing of a door, voltage fluctuation of a commercial power supply, or the like. Even if it fluctuates, the ignition detection means can prevent erroneous ignition detection by maintaining the held temperature rise gradient below the predetermined value.

According to a seventh aspect of the present invention, the ignition detecting means comprises:
Since the heating cooker according to claim 5 is configured to set a predetermined value to the held temperature rising gradient at the start of energization to the heating means, even if ignition occurs in the cooking chamber immediately after the start of cooking, The ignition detecting means can detect the ignition in the cooking chamber based on the predetermined value, suppress the heating, and extinguish the fire.

[0026] In the invention according to claim 8, the ignition detecting means comprises:
When the rising gradient of the temperature detected by the temperature sensor this time is a gentle value with respect to the held temperature rising gradient, the held temperature rising gradient is updated to the current temperature rising gradient, and the temperature detected by the current temperature sensor is updated. When the rising gradient is a steep value with respect to the temperature rising gradient to be held, the heating cooker according to claim 5 is configured to hold the temperature rising gradient to be held as it is, so that after the cooking is started, By detecting the ignition based on the change of the temperature rise gradient with respect to the gentlest portion of the temperature rise gradient detected by the temperature sensor, the detection accuracy of the ignition detection means can be improved.

According to a ninth aspect of the present invention, the ignition detecting means includes:
When the temperature sensor detects that the temperature detected by the temperature sensor decreases, the heating cooker according to any one of claims 5 to 8 is configured to initialize and re-create the held temperature rise gradient. Even if the cooking cabinet is preheated in an empty state and then the door is opened and closed to put the food into the cooking cabinet without stopping heating, the ignition detection unit detects that the temperature detected by the temperature sensor decreases. By restarting the ignition detection operation from the beginning, it is possible to prevent ignition detection by mistake and to perform ignition detection according to the state in the cooking cabinet after the door is closed.

According to a tenth aspect of the present invention, when the ignition detecting means detects that the temperature detected by the temperature sensor has decreased, the ignition detecting means initializes and re-creates the held temperature increase gradient and detects the temperature decrease. 10. The heating cooker according to claim 9, wherein the updating of the held temperature rise gradient is prohibited within a predetermined time after the ignition, so that the ignition detection unit holds the temperature rise gradient after the predetermined time after closing the door. Can be updated to prevent erroneous ignition detection based on the part where the temperature detected by the temperature sensor immediately after the door is closed becomes extremely low.

[0029] The invention according to claim 11 is a heating means for heating the food in the cooking chamber, a temperature sensor for detecting the temperature in the cooking chamber, and a smoke chamber for generating smoke in the cooking chamber. Smoke removing means for removing to the outside, ignition detecting means for detecting that ignition has occurred in the cooking chamber based on a signal input from the temperature sensor, and energizing control of the heating means and the smoke removing means. And, since the heating cooker is provided with a control unit that suppresses energization to the heating unit and the smoke removing unit based on a signal input from the ignition detection unit, when the ignition detection unit detects an ignition in the cooking chamber, In addition to the heating means, by stopping the current supply or reducing the electricity supply rate of the smoke removing means, in addition to heating the inside of the cooking chamber, shut off or reduce the flow of air, thereby extinguishing the inside of the cooking chamber more quickly and reliably. In That.

According to a twelfth aspect of the present invention, in the heating cooker according to the eleventh aspect, the temperature sensor is disposed near an exhaust port in the cooking chamber. By providing the temperature sensor at the end, the ignition detecting means can more sensitively grasp the temperature state of the entire cooking cabinet, and can detect the ignition in the cooking cabinet over a wider range.

According to a thirteenth aspect of the present invention, there is provided a notifying means for performing a fire notification, and when the control means detects that a fire has occurred in the cooking chamber based on a signal inputted from the fire detection means, a predetermined time is provided. 13. The heating cooker according to any one of claims 1 to 12, wherein the control unit inputs from the ignition detection unit when the ignition occurs in the cooking chamber after the elapse of the elapsed time. Based on the signal, the ignition in the cooking chamber is detected and the heating means or the smoke removing means is suppressed from being energized to extinguish the inside of the cooking chamber. By notifying that a fire has occurred in the cooking cabinet, when the user of the appliance opens the door and checks the food after the notification, outside air is sucked into the cooking cabinet and the ignition recurs. A bonfire flies out of the cooking cabinet It can be prevented from being out.

According to a fourteenth aspect of the present invention, the control means detects that ignition has occurred in the cooking chamber based on a signal input from the ignition detection means, and thereafter sets the temperature detected by the temperature sensor. Since the heating cooker according to any one of claims 3 to 13 is configured to maintain the suppression of energization of the heating means or the smoke removing means regardless of the manner, once the ignition in the cooking chamber is performed by the ignition detection means. After detecting and controlling the heating means or the smoke removing means to stop energizing or reducing the rate of electricity to extinguish the inside of the cooking chamber, even if the temperature detected by the temperature sensor decreases, the controlling means does not apply the heating means or the smoke removing means. It is possible to prevent the inside of the cooking chamber from being heated again with a high heating power or smoke being removed with a large air flow, thereby leading to ignition, without energizing the unit or increasing the energization rate.

According to a fifteenth aspect of the present invention, there is provided a heating means for heating the food in the cooking chamber, a temperature sensor for detecting the temperature in the cooking chamber, a rising gradient and an absolute value of the temperature detected by the temperature sensor. In both cases, ignition detection means for detecting that ignition has occurred in the cooking chamber, and energization control of the heating means, and ignition detection at a temperature rising gradient based on a signal input from the ignition detection means When the power supply to the heating means is suppressed for a predetermined period of time, cooking is continued by increasing the power supply rate of the heating means again, and ignition is detected at an absolute value of temperature based on a signal input from the ignition detection means. Is a heating cooker provided with a control means for suppressing the current supply to the heating means and maintaining it thereafter, for example, a saucer installed at the lower portion of the cooking chamber during heating of a food containing a large amount of fat components such as saury and chicken. If the accumulated fat or oil smoke filling the cooking chamber ignites and ignites, the temperature in the cooking chamber rises rapidly, so the ignition detection means detects the ignition at the temperature rise gradient in the cooking chamber and controls. The heating means is turned off or the heating rate is increased again after the heating means is turned off or reduced for a predetermined time based on a signal input from the ignition detection means, thereby stopping heating or reducing the heating power for the predetermined time. During the period, the inside of the cooking cabinet is extinguished, and then the heating can be started again or the heating power can be increased to resume cooking. Further, for example, when the food itself in the cooking chamber ignites, the temperature in the cooking chamber rises relatively slowly as compared to the ignition by the fat or the like in the cooking chamber, so that the ignition detecting means is provided in the cooking chamber. In the temperature rise gradient, the ignition is detected by the absolute value of the temperature without detecting the ignition, and the control means stops the energization of the heating means based on the signal input from the ignition detection means and thereafter maintains the heating, thereby stopping the heating of the cooked food. It is possible to suppress the fire in the cooking chamber and finish cooking to prevent the cooked food from being damaged.

[0034] The invention according to claim 16 is provided with smoke removing means for removing smoke and the like generated in the cooking cabinet to the outside of the cooking cabinet, and the control means controls the smoke removing while cooking the food in the cooking cabinet. When power is supplied to the means and ignition is detected at the temperature rising gradient based on a signal input from the fire detecting means, the power supply to the smoke removing means is suppressed for a predetermined time and then the duty ratio of the smoke removing means is increased again. 16. The heating according to claim 15, wherein cooking is continued, and when ignition is detected at the absolute value of the temperature based on a signal input from the ignition detection means, the power supply to the smoke removing means is suppressed and maintained thereafter. Since it is a cooker,
For example, in the case where the cooking material containing a large amount of the fat component is ignited due to the ignition of the fat accumulated in the saucer or the oil smoke filling the cooking chamber during heating, the ignition detecting means ignites at a temperature rising gradient in the cooking chamber. Based on a signal input from the ignition detection means, the control means cuts off the power supply or reduces the power supply rate of the smoke removal means in addition to the heating means for a predetermined period of time, and then starts or turns on the power supply of the heating means and the smoke removal means again. By suppressing the smoke removal operation in addition to the heating operation, the inside of the cooking cabinet is more quickly and reliably extinguished, and then the high-heat heating and large-volume smoke removal operation is started again to start cooking. Can be resumed. Further, for example, when the food in the cooking chamber itself ignites, the ignition detecting means detects the ignition based on the absolute value of the temperature in the cooking chamber, and the control means controls the heating means and the heating means based on a signal input from the ignition detecting means. By stopping the power supply to the smoke means and maintaining it thereafter, the smoke removal operation in addition to the heating operation is also stopped, and the fire in the cooking cabinet is more quickly and reliably extinguished, and the cooking is finished to prevent the food from being damaged. it can.

According to a seventeenth aspect of the present invention, there is provided a notifying means for notifying the ignition, and the control means detects the ignition at the absolute value of the temperature based on a signal inputted from the ignition detecting means, and after a predetermined time elapses. The heating cooker according to claim 15 or 16, wherein the notification unit is driven and controlled, and the ignition unit is not driven when ignition is detected at the temperature rising gradient based on a signal input from the ignition detection unit. Therefore, for example, when the cooking material containing a large amount of the fat component is ignited due to the accumulation of fat in the saucer or the oil smoke filling the cooking chamber during heating, the ignition detection unit detects the temperature rise gradient in the cooking chamber. After the ignition is detected, the control means does not drive the notifying means based on the signal input from the ignition detection means, and suppresses the energization of the heating means or the smoke removing means for a predetermined time, and then resumes the heating means or removing By increasing the duty ratio of the unit, it is possible to resume the extinguishing then cooked again in the cooking chamber during a predetermined time without discomfort to the person using the equipment. Further, for example, when the food in the cooking chamber itself ignites, the ignition detecting means detects the ignition based on the absolute value of the temperature in the cooking chamber, and the control means controls the heating means or the heating means based on a signal input from the ignition detecting means. By stopping the energization of the smoke means and maintaining it thereafter and controlling the drive of the notification means after a predetermined time has elapsed, the heating or smoke removal operation of the cooked food is stopped to extinguish the inside of the cooking chamber during the predetermined time, and After a lapse of a predetermined time, the notification means is drive-controlled to notify the user of the appliance that cooking is completed.

[0036]

(Embodiment 1) Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a block diagram showing a heating cooker according to a first embodiment of the present invention. In this embodiment, FIG.
Or, those having the same functions as those of the conventional example shown in FIG. The characteristic configuration of this embodiment is as follows.

First, a temperature sensor 16 is newly provided in place of the thermostat 10, and the air inside the cooking cabinet 1 is moved out of the cooking cabinet 1 by the smoke removing fan 13 in a state where the temperature sensor 16 protrudes inward from the side of the cooking cabinet 1. Place it near the exhaust outlet to discharge.

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

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

Further, the temperature detected by the temperature sensor 16 ≧
At 260 ° C., an ignition detection means 23 for detecting that an ignition has occurred in the cooking cabinet 1 and a control means 24 for totally controlling the above constituent means are additionally provided. The control means 24 starts cooking based on a signal input from the input means 20 and 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, the catalyst heater 12 is energized, and the smoke removing fan control means 19 is controlled to drive the smoke removing fan 13. Also,
The control means 24 controls the upper and lower heater control means 17 at the temperature control temperature = 230 ° C., that is, the temperature detected by the temperature sensor 16 = 230 ° C., and controls the energization of the upper heater 2 and the lower heater 3 to reduce the temperature in the cooking chamber 1. Adjust temperature to 280 ° C. Further, when the control means 24 detects the ignition in the cooking chamber 1 based on the signal input from the ignition detection means 23, 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 to control the upper heater. 2. The power supply to the lower heater 3, the catalyst heater 12, and the smoke removing fan 13 is cut off, and the display means 21 and the notification means 22
Is controlled to notify the user of the appliance that ignition has occurred in the cooking cabinet 1.

FIG. 2 is a circuit diagram of the cooking device according to the first embodiment of the present invention. As shown in FIG. 2, the upper and lower heater control means 17 includes a relay 17a, a transistor 17b, and the like.
To turn on the upper heater 2, the lower heater 3, and the commercial power supply 14.
To heat the inside of the cooking cabinet 1. Similarly, the catalyst heater control means 18 also includes a relay 18a, a transistor 18
The transistor 18b is turned on, the relay 18a is turned on, and the catalyst heater 12 and the commercial power supply 14 are energized based on the signal input from the control unit 24, and the catalyst filter 1 is turned on.
Heat 1 Further, the smoke removing fan control means 19 includes a triac 19a, a transistor 19b, and the like.
b turns on and triac 19a turns on and smoke removal fan 1
3 and the commercial power supply 14 are energized to rotate the smoke removing fan 13.

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 based on the absolute value of the temperature. Control means 2
4 starts cooking based on a signal input from the input means 20 and controls the upper and lower heater control means 17, the catalyst heater control means 18 and the smoke removing fan control means 19 to energize the upper heater 2 and the lower heater 3 to cook the cooking chamber. The inside of the cooking cabinet 1 is heated, and at the same time, the catalyst heater 12 is heated to drive the smoke removing fan 13 to remove smoke and smell generated inside the cooking cabinet 1 by passing through the catalyst filter 11.

Then, as shown in FIG. 3, the temperature detected by the temperature sensor 16 increases as the temperature in the cooking chamber 1 increases, and the temperature detected by the temperature sensor 16 ≧ 2
When the temperature reaches 30 ° C., the control means 24
7 to shut off the power supply to 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 sets the upper and lower heater control means 17 To control the upper heater 2
And the lower heater 3 is energized again. The temperature inside the cooking cabinet 1 is kept constant by the temperature adjustment control as described above.

At this time, when the food in the cooking cabinet 1 is ignited and fire occurs in the cooking cabinet 1, the control means 24 controls the upper and lower heater control means 17 to control the upper heater 2 and the upper heater 2 as shown in FIG. Even though the power supply to the lower heater 3 is cut off, the temperature in the cooking cabinet 1 keeps increasing, and the temperature detected by the temperature sensor 16 also keeps increasing. Then, the ignition detecting unit 23 detects the temperature detected by the temperature sensor ≧ 260 ° C.
(> Temperature control temperature) to detect the ignition in the cooking chamber 1 and output a signal to the control means 24 (the temperature at which the ignition in the cooking chamber 1 is detected is hereinafter referred to as an ignition detection temperature). Then, the control means 24 controls the catalyst heater control means 18 and the smoke removing fan control means 1 based on the signal input from the ignition detection means 23.
9 to stop the energization of the catalyst heater 12 and stop the driving of the smoke removing fan 13, and keep the energization of the upper heater 2, the lower heater 3, the catalyst heater 12 and the smoke removing fan 13 thereafter.

With the above-described configuration, when the ignition of the food occurs in the cooking chamber 1 during cooking, the control means 24 stops the heating and the smoke removing operation in the cooking chamber 1 and extinguishes the food. In addition, the heating and the smoke removing operation are stopped after that, the cooking is terminated, and the food can be prevented from being over-burned.

Then, the upper heater 2, the lower heater 3,
1 after power off of catalyst heater 12 and smoke removal fan 13
After the elapse of the minute, the control means 24 controls the display means 21 and the notification means 22 to notify that ignition has occurred in the cooking cabinet 1.

With the above-described configuration, it is possible to notify the user of the appliance that ignition has occurred in the cooking cabinet 1 and to notify the user after the inside of the cooking cabinet 1 has been extinguished, so that the appliance can be used. Even if the user opens the door to check the food by the notification, the fire can be prevented from jumping out of the cooking cabinet 1. And, even in the state where the ignition is detected and the cooking is completed, 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 input means 20, and again controls the upper heater 2, the lower heater 3, the catalyst heater 12 and the smoke removal. Power supply to the fan 13 can be started.

With the above-described configuration, the user using the appliance takes out the ignited food from the cooking cabinet 1 and informs the cooking appliance 1 of a new cooking product by notifying that the ignition has occurred in the cooking cabinet 1. When the input means 20 is operated in order to use the apparatus again in the inside, the control means 24 can restart the heating operation and the smoke removing operation and start cooking again.

Further, the structure in which the smoke removing fan 13 is stopped after the detection of the fire is cut off, so that the flow of air into the cooking cabinet 1 is cut off, thereby promoting a state of oxygen deficiency in the cooking cabinet 1 to facilitate fire suppression. It should be noted that the same effect can be obtained with a different effect level even if the configuration is such that the duty ratio of the smoke removing fan 13 is reduced although it is not necessary to stop the smoke removing fan 13 after detecting the ignition. Since the temperature sensor 16 can be affected by the temperature of the entire cooking cabinet 1 by the configuration provided near the exhaust port of the cooking cabinet 1, the ignition detection means 23 is provided with the temperature sensor 16 in the cooking cabinet 1. Even when ignition occurs at a location relatively far from the place, ignition can be detected relatively quickly and reliably. The smoke removal fan 1
Although the same effect can be obtained by the above-described configuration even with the configuration having no 3, the configuration having the smoke removing fan 13 and forcibly generating the flow of air in the cooking cabinet 1 has a greater effect degree. .

The difference between the ignition detection temperature and the temperature control temperature is 3
Although the temperature is set to 0 ° C., if the temperature does not exceed the overshoot (approximately 10 ° C.) when the temperature reaches the temperature regulation temperature or the temperature ripple at the time of the temperature control, the ignition detection accuracy can be improved by reducing the value. .

When the temperature detected by the temperature sensor 16 ≧ 230 ° C., the upper and lower heater control means 1
7, the power supply to the upper heater 2 and the lower heater 3 is cut off, but the same effect can be obtained by a configuration in which the power supply rate is reduced by turning on and off the upper heater 2 and the lower heater 3.

The ignition detecting means 23 has a temperature sensor for detecting the ignition in the cooking chamber 1 and the control means 24 has a temperature sensor for maintaining the temperature in the cooking chamber 1 at a predetermined temperature by the temperature adjusting operation. The same effect can be obtained by using a separate configuration, however, as shown in the present embodiment, the ignition detection unit 23 detects ignition using the same temperature sensor 16 and the control unit 24 controls the temperature adjustment operation. If the configuration is performed, the configuration of the device can be simplified.

(Embodiment 2) A second embodiment of the present invention will be described below with reference to FIGS. FIG.
FIG. 5 is a block diagram showing a heating cooker according to a second embodiment of the present invention. The difference from the first embodiment is that the control means 24 heats and cooks raw fish such as saury, as it is, and the “meat / dried” mode heats and cooks salmon and other cuts and dried fish such as open mackerel. Modes: "Tsukeyaki" mode for heating and cooking fried soup or pickled straw soup; "Tori meat" mode for cooking chicken; "Yakisasu" mode for cooking eggplant; and cooking for sweet potato Six "auto-cooking" modes of "baked potato" mode, "manual heating" mode in which cooking is performed for any of the three heating powers of "weak", "medium" and "strong", and the above-mentioned modes And a standby mode in which any one of the above modes can be selected, each of which has a temperature control temperature corresponding to each mode and heating power. Is selected It is and whether the input from the control unit 24 is to a firing temperature detected in response to the controlled temperature of the selected mode of the seven modes other than "standby" mode with each. Table 1 shows the temperature control temperature and the ignition detection temperature in each mode and thermal power except the “standby” mode.

[0054]

[Table 1]

In the first embodiment, for example, "tori"
When ignition occurs in the cooking chamber 1 during cooking in the mode, as shown in Table 1, the control unit 24 sets the temperature control temperature = 1.
Since the energization control of the upper heater 2 and the lower heater 3 is performed at 95 ° C., the temperature detected by the temperature sensor 16 ≧ 260 ° C.
It takes a considerable amount of time to reach the point, and there is a problem that the ignition detection by the ignition detection unit 23 is delayed and the extinguishing operation of the control unit 24 is delayed.

This embodiment solves the above-mentioned problem, and relates to a heating cooker configured as described above, as shown in FIG.
The operation will be described with reference to FIG. FIG. 5 is an operation display layout of the cooking device in 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 performing a power-off / on operation and a power supply LED 21a for displaying a power-off / on state, and corresponds to the above-mentioned six "auto-cooking" modes.
Key 20b and “Raw / Shaped” LED 21b, “Fill / Dry” key 20c and “Fill / Dry” LED 21c, “Tsukeyaki” key 20d and “Tsukeyaki” LED 21d, “Tori meat” key 20e and “Tori meat” An LED 21e, a "burning" key 20f and a "burning" LED 21f, a "baking" key 20g and a "burning" LED 21g are provided, respectively.

The display means 21 corresponds to the above-mentioned three heating powers, and indicates “low” LED 21 h, “medium” LED 21 i,
A "strong" LED 21j is provided, and the input means 20 is used to select one of the three heating powers.
h.

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

Further, in the "auto-cooking" mode, the time until the cooking is completed is displayed, and in the "manual heating" mode, the time after the setting change is additionally displayed.
1 is the "time display" that displays the time with a number from 0 to 30
An LED 21k is provided.

As a method of using the device, first, a user of the device turns on the power switch 20a to make the device usable. 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, keeps the other LEDs 21b to 21k off, and sets the keys 20b to 2
0j can be accepted.

If, for example, the user of the appliance wants to cook the whole saury and cooks it, the saury is placed on the grill 5 in the cooking cabinet 1 and the door is closed, and the “raw / appearance” in FIG. When the “baking” key 20b is operated, the control means 24
The operation mode of the device is changed to the “raw / shaded grill” mode by inputting that the “shaded grill” key 20b has been operated, the “raw / shaded grill” LED 21b is turned on, and the catalyst heater control means 18 and the smoke removal By controlling the fan control means 19, the catalyst heater 12 and the smoke removing fan 13 are energized, and the upper and lower heater control means 17 are controlled to control the temperature control temperature = 23 shown in Table 1.
At 0 ° C., the upper heater 2 and the lower heater 3 are turned on / off to heat and cook the saury in the cooking cabinet 1.

Here, when the saury in the cooking cabinet 1 is ignited, the ignition detecting means 23 detects the temperature of the saury in the cooking cabinet 1 based on the temperature detected by the temperature sensor 16 at the ignition detecting temperature = 260 ° C. shown in Table 1. The ignition unit detects the ignition and outputs a signal. The control unit 24 controls the upper and lower heater control unit 17, the catalyst heater control unit 18 and the smoke removing fan control unit 19 based on the signal input from the ignition detection unit 23 to control the upper heater 2 and the lower heater 2. The power supply to the heater 3, the catalyst heater 12, and the smoke removing fan 13 is cut off and maintained thereafter, and the saury in the cooking cabinet 1 is extinguished to finish cooking.

For example, when it is desired to heat and cook chicken thigh, the "meat" key 20e shown in FIG. 5 is operated, and the control means 24 inputs that the "meat" key 20e is operated, and the control means 24 operates the appliance. 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 and lower heater control means 17 is controlled to turn on and off the upper and lower heaters 2 and 3 at the controlled temperature of 195 ° C. shown in Table 1 to heat and cook the chicken thighs in the cooking cabinet 1.

Here, when the chicken thigh in the cooking chamber 1 ignites, the ignition detecting means 23 detects the ignition detection temperature shown in (Table 1) = 225 ° C. based on the temperature detected by the temperature sensor 16.
The control means 24 controls the upper and lower heater control means 17, the catalyst heater control means 18 and the smoke removing fan control means 19 based on a signal input from the fire detection means 23. Then, the power supply to the upper heater 2, the lower heater 3, the catalyst heater 12, and the smoke removing fan 13 is cut off and maintained thereafter, and the chicken thigh in the cooking cabinet 1 is extinguished to finish cooking.

With the above configuration, the ignition detection means 23 changes the ignition detection temperature at which the ignition in the cooking cabinet 1 is detected in accordance with 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 in the cooking cabinet 1 and the cooking content.

It should be noted that the ignition detection temperature 23 is a temperature higher by the same margin (30 ° C.) than each temperature control temperature of the control means 24 as the fire detection temperature, but the ignition detection temperature has a different margin for each temperature control temperature. The same effect can be obtained as the detected 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, in addition to the ignition detecting means 23 detecting the ignition in the cooking chamber 1 when the temperature detected by the temperature sensor 16 ≧ 260 ° C., the temperature detected by the temperature sensor 16 increases by 2 ° C. The elapsed time is measured as ΔT, and if ΔT <1.0 second is repeated three times, it is detected that ignition has occurred in the cooking chamber 1.

In the first embodiment, for example, when the temperature detected by the temperature sensor 16 is around 200 ° C., the fat accumulated in the saucer 4 and the oil smoke filled in the cooking cabinet 1 are ignited and ignited. In spite of the fact that the temperature to be detected rises with a very steep temperature rise gradient, the ignition detection means 23 can detect ignition until the temperature detected by the temperature sensor 16 ≥ 260 ° C. The fire suppression operation by the control means 24 is delayed. Would.

Therefore, in order to prevent the above-described ignition state, water is poured into the saucer 4 to prevent the saucer 4 from igniting and the cooking chamber 1 from being filled with oily smoke. There is a problem that the water put in the saucer 4 therein becomes steam and fills the inside of the cooking chamber 1, leaving a fresh smell when the raw fish is baked, or the food becomes moist without being burnt quickly.

This embodiment solves the above-mentioned problem. The heating cooker constructed as described above is described with reference to FIG.
The operation will be described with reference to FIG. 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 below. 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 saucer 4 to increase the temperature of the fat and produce oily smoke. Cooker 1
To be charged within.

Then, even when the temperature detected by the temperature sensor 16 is relatively low, such as about 200 ° C., the grease dripping from the cooked food comes into contact with the lower heater 3 and ignites. The entire fat accumulated in the pan 4 is ignited,
Eventually, this may lead to the ignition of the oil smoke filling the cooking chamber 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 detecting means 23 determines that ΔT <
Upon detecting three consecutive 1.0 seconds, the upper and lower heater control means 17 is immediately controlled, the upper heater 2 and the lower heater 3 are de-energized, and the heating operation is stopped.
And the smoke removing fan control means 19 to control the catalyst heater 12
The power supply to the smoke removing fan 13 is stopped to stop the smoke removing operation, and the inside of the cooking cabinet 1 is extinguished.

The upper heater 2, the lower heater 3,
1 after power off of catalyst heater 12 and smoke removal fan 13
After a lapse of minutes, the control means 24 controls the display means 21 and the notifying means 22 to notify that the ignition has occurred in the cooking cabinet 1, and to the user of the appliance, the ignition occurs in the cooking cabinet 1. Display that heating has been stopped.

With the above-described configuration, the inside of the cooking chamber 1 is ignited with a sharp temperature rise gradient in a relatively low temperature state, such as the ignition of oil accumulated in the pan 4 and oil smoke filled in the cooking chamber 1. In the case of (1), the ignition detecting means 23 instantaneously detects the ignition, and the control means 24 quickly stops the heating of the cooking cabinet 1 and extinguishes the fire to suppress the rise in the temperature of the outer casing of the appliance and the like, and one minute later, the display means 21 In addition, it is possible to notify the fact that ignition has occurred in the cooking cabinet 1 by the notification means 22 and to urge the user to take care such as washing away the fat accumulated in the tray 4.

Although the ignition detecting means 23 measures the time elapsed until the temperature rises by the unit temperature and sets 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.

Further, once the cooking chamber 1
When the internal combustion is detected, even if the temperature detected by the temperature sensor 16 decreases thereafter, the control means 24 is configured to maintain the stoppage 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 configuration, after the heating is stopped and the inside of the cooking cabinet 1 is extinguished, the stop of the heating and the smoke removing operation is maintained, and the heating and the smoke removing operation are again performed in the cooking cabinet 1 by the reheating or the smoke removing operation. It is possible to prevent ignition from occurring.

When the control means 24 detects the ignition in the cooking chamber 1 based on the signal inputted from the ignition detection means 23, the control means 24 immediately controls the upper and lower heater control means 17, the catalyst heater control means 18 and the smoke removing fan control means 19. The upper heater 2, the lower heater 3, the catalyst heater 12, and the smoke removal fan 1 are controlled.
The power supply to the upper heater 2, the lower heater 3, the catalyst heater 12, and the smoke removing fan 13 is stopped one minute later 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 the energization is started.

With the above-described configuration, even if water is not put into the saucer 4, the control means 24 heats and cooks the cooked food while suppressing the ignition generated in the cooking chamber 1, and makes the saury and the like less odorous. It can be baked quickly.

(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 unit 23 holds the immediately previous stable ΔT as the previous temperature rise gradient data, and detects ΔT <the previous temperature rise gradient data × 0.5 three times in succession. Then, it is detected that ignition has occurred in the cooking cabinet 1.

In the third embodiment, for example, when the rice cake swelled in the process of baking the rice cake contacts the upper heater 2 and ignites, the temperature detected by the temperature sensor 16 is relatively low and ΔT =
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, but the ignition can be detected only at the temperature ≧ 260 ° C. detected by the temperature sensor 16, so that the ignition detection by the ignition detection unit 23 is delayed and the extinguishing operation of the control unit 24 is delayed.

Further, the ignition detection means 23 is changed so that ΔT> 3.0 seconds (1.0 second in the third embodiment) is continuously detected three times to detect the ignition so that the ignition can be detected even in the above phenomenon. Then, when the cooking chamber 1 is heated and cooked in an empty state, the temperature rises with a rising gradient of ΔT = about 2.0 seconds when the commercial power supply voltage is AC110V, and the ignition detection unit 23 erroneously detects ignition. There is a problem that.

This embodiment solves the above-mentioned problem, and relates to a heating cooker configured as described above with reference to FIG.
The operation will be described with reference to FIG. FIG. 7 is a diagram illustrating an ignition detection operation based on a change in the temperature rising gradient. FIG. 8 shows the ignition detecting means 2 according to the fourth embodiment.
3 is a flowchart showing an ignition detection operation based on a temperature rise gradient of No. 3; As shown in FIG.
Measures the time that elapses when the temperature θ detected by the temperature sensor 16 increases by 2 ° C. as ΔT, and uses θb as the reference temperature data for comparing whether or not the temperature has increased, and ΔT immediately before ΔT.
Is held as ΔTx, and temperature rise gradient data as a reference for ignition detection is held as ΔTb, and ΔTb>
A counter for counting ΔT three times is provided. Then, the ignition detecting means 23 initializes the counter to 0, θb = the current temperature θ detected by the temperature sensor 16 in step 2 when starting the operation.

Then, in step 3, when it is detected that the temperature θ detected by the temperature sensor 16 rises by 2 ° C. in comparison with θb, in step 4, θb is updated to θb = θb + 2.0, 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.

When the rice cake is placed on the grill 5 and placed in the cooking cabinet 1 to start heating and cooking, the temperature θ detected by the temperature sensor 16 is about ΔT = 5.0 seconds as shown in FIG. To rise. Here, as shown in FIG. 8, the ignition detecting 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 swells upward,
When the rice cake is ignited due to contact with the upper heater 2, the rising gradient of the temperature θ detected by the temperature sensor 16 becomes steep as shown in FIG. 7 and increases at ΔT = about 2.0 seconds. Here, as shown in FIG.
From step 5 to step 17, ΔTb (= 2.5 seconds)> ΔT
(= 2.0 seconds) is detected three times in succession, and when the ignition in the cooking cabinet 1 is detected, the process proceeds to the ignition detection process, and a signal indicating that the ignition has occurred in the cooking cabinet 1 is output to the control means 24. I do. Then, the control means 24 controls the upper and lower heater control means 17, the catalyst heater control means 18 and the smoke removing fan control means 19 based on the signal inputted from the ignition detection means 23 to stop the energization of the upper heater 2 and the lower heater 3, and Stop the heating operation,
The power supply to the catalyst heater 12 and the smoke removing fan 13 is stopped to stop the smoke removing operation.

When heating is started with the cooking chamber 1 empty, the temperature θ detected by the temperature sensor 16 becomes 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 in step 15 in FIG.
The process branches to 8 and the ignition is not detected by mistake.

With the above configuration, even if the cooking chamber 1 is emptied and heated, the ignition is not erroneously detected.
Even if the temperature detected by the temperature sensor 16 such that the rice cake swells 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
However, the control means 24 can accurately detect the ignition in the cooking cabinet 1 and perform the fire suppression operation.

It should be noted that the ignition detecting means 23 determines in step 10
And compare ΔTb and ΔT (n + 1) × 0.5,
If .gtoreq..DELTA.T (n + 1) .times.0.5, the flow branches to step 12 and .DELTA.Tb is not updated.

With the above configuration, the ignition detecting means 2
3 is the slowest temperature rise gradient data from the start of operation Δ
Tb is held as Tb, and the control means 24 can more promptly extinguish the inside of the cooking cabinet 1 by detecting the ignition occurring in the cooking cabinet 1 more sensitively.

Further, the ignition detecting means 23 determines in step 12
Then, ΔTb is compared with 4.0 seconds, and if ΔTb> 4.0 seconds, ΔTb is set to 4.0 seconds in step 13.

With the above configuration, the temperature sensor 16
It is possible to prevent ΔTb from becoming an extremely large value due to excessive fluctuations in the temperature θ detected by the detection of erroneous detection of ignition. In addition, this numerical value of 4.0 seconds is the cooking cabinet 1
It should be as small as possible based on the temperature rise gradient when the food placed in it ignites.

Further, the ignition detecting means 23 initializes ΔTb = 1.0 second in step 1 when starting the operation.

With the above-described configuration, even if ignition occurs in the cooking chamber 1 during the period from the start of heating to the time ΔTb is generated, a rapid temperature at which the fat accumulated in the pan 4 ignites. If the ignition is accompanied by a rise, the ignition detecting means 23 detects the ignition based on ΔTb = 1.0 second, and
4 can perform a fire suppression operation.

The ignition detecting means 23 performs the ignition detection by detecting a change in the time elapsed after the temperature rises by the unit temperature. A similar effect can be obtained by a configuration in which a change in the ignition is detected and ignition is detected.

(Embodiment 5) Hereinafter, a fifth embodiment of the present invention will be described with reference to FIG. The difference from the fourth embodiment is that the ignition detection unit 23 detects that the temperature θ detected by the temperature sensor 16 has decreased by 4 ° C. or more, updates the temperature data serving as a comparison reference for the temperature rise, and holds and updates the temperature data. Initialize the previous temperature rise gradient data and restart the ignition detection operation from the beginning.
For one minute, the updating of the previously held temperature rise gradient data is prohibited.

In the fourth embodiment, for example, the cooking cabinet 1 is preheated in an empty state, and after the inside of the cooking cabinet 1 has reached a high temperature state, the door is opened and the food is placed on the grill 5. Thereafter, when the door is closed and cooking is performed, as shown in FIG.
6, there is a problem that the ignition detecting means 23 generates ΔTb to a large value and erroneously detects the ignition by opening the door.

This embodiment solves the above-mentioned problem, and relates to a heating cooker configured as described above with reference to FIG.
The operation will be described using 0. FIG. 10 is a flowchart showing the ignition detection operation based on the temperature decrease detection and the temperature increase gradient of the ignition detection means 23 in the fifth embodiment. Components having the same functions as those of the fourth embodiment shown in FIG. 8 are denoted by the same reference numerals, and description thereof will be omitted. The characteristic configuration of the present embodiment is that the ignition detecting means 23 has a lowering flag as a flag indicating the lowering detection of the temperature θ detected by the temperature sensor 16 and sets the lowering flag = 0 at step 19 when the operation is started. Keep it. When it is detected in step 20 that the temperature θ detected by the temperature sensor 16 has decreased by 4 ° C., in step 21, the decrease flag is set to 1 and
The process proceeds to step 1 where ΔTb is initialized to 1.0 second and the ignition detection operation is restarted from the beginning.

With the above configuration, even if the door is opened and closed while the cooking cabinet 1 is being heated, the ignition detection means 23 detects the temperature drop and starts the ignition detection operation again from the beginning. It is possible to prevent ignition detection by mistake.

Further, it is detected at step 22 that one minute has elapsed after the temperature drop is determined, and then at step 23 a drop flag =
Since it is cleared to 0, for one minute after the temperature drop is determined, the process branches off at step 24 from the drop flag = 1 and goes to step 10
作成 Tb 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 the part where the rising gradient of the curve becomes extremely gentle, and to cause erroneous ignition detection.

(Embodiment 6) Hereinafter, a sixth embodiment of the present invention will be described with reference to FIG. As a characteristic configuration of the present embodiment, the ignition detection means 23 has a function of detecting ignition with an 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, As shown in the embodiment of the present invention, both the function of detecting the ignition with the rising gradient of the temperature θ such as the continuous detection of ΔT <1.0 seconds three times is provided. When the control unit 24 detects ignition at a rising gradient of the temperature θ based on a signal input from the ignition detection unit 23, the control unit 24 stops energizing the upper heater 2, the lower heater 3, the catalyst heater 12, and the smoke removing fan 13. One minute later, the power supply to the upper heater 2, the lower heater 3, the catalyst heater 12, and the smoke removing fan 13 is restarted. When the control unit 24 detects the ignition at the absolute value of the temperature θ based on the signal input from the ignition detection unit 23, the control unit 24 stops the energization of the upper heater 2, the lower heater 3, the catalyst heater 12, and the smoke removing fan 13. One minute later, the display means 21 and the notifying means 22 are controlled to notify that ignition has occurred in the cooking cabinet 1.

When the oil accumulated in the receiving pan 4 or the oil smoke filled in the cooking cabinet 1 ignites and ignites, it is necessary to immediately stop the heating and extinguish the inside of the cooking cabinet 1.
The food placed inside may not be fully baked. In this case, since the temperature θ detected by the temperature sensor 16 rises with a very steep temperature rising gradient, the ignition detecting means 23 detects the temperature θ such that ΔT <1.0 seconds is detected three times consecutively.
The ignition means is detected at the rising gradient of the ignition means, 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 after one minute, the control means 24 Power supply to the heater 2, the lower heater 3, the catalyst heater 12, and the smoke removing fan 13 is restarted.
The notification by the display means 21 and the notification means 22 is not performed.

With the above-described configuration, when the saury or the like is heated and cooked, and the oil accumulated in the saucer 4 or the oil smoke filled in the cooking cabinet 1 ignites and ignites, the ignition in the cooking cabinet 1 is detected. To stop the heating and smoke removing operation for one minute to extinguish the inside of the cooking cabinet 1, and to start the heating and smoke removing operation again without notification after one minute to give a sense of incongruity to a user of the appliance. Cooking can be resumed without the need. Therefore, even if the tray 4 is not filled with water, the cooked food can be heated and cooked while suppressing the ignition generated in the cooking cabinet 1, and the saury can be baked without smell.

If the food in the cooking cabinet 1 comes into contact with the upper heater 2 or the lower heater 3 and is heated too much and a part of the food is ignited, the food is burned too much. Need to end. In this case, the temperature sensor 1
6, the ignition detection means 23 detects ignition at an absolute value of the temperature θ such as θ ≧ 260 ° C., and the control means 24 inputs from the ignition detection means 23. The power supply to the upper heater 2, the lower heater 3, the catalyst heater 12, and the smoke removing fan 13 is stopped and maintained based on the signal. One minute later, "U11" is displayed on the "time display" LED 21k of the display means 21 shown in FIG. Then, the notifying unit 22 notifies that the ignition has occurred in the cooking cabinet 1.

According to the above-described configuration, when the food itself is ignited, the heating and smoke removing operations are stopped immediately after the ignition of the food in the cooking chamber 1 is detected to extinguish the fire in the cooking chamber 1. At the same time, when the fire in the cooking cabinet 1 after the elapse of one minute is ensured, it is possible to notify that the cook has ignited and the cooking has been completed.

In the sixth embodiment, the stop time of the heating and the smoke removing operation when the ignition is detected at the temperature rising gradient, and the heating and the smoke removing when the ignition is detected at the absolute value of the temperature and the notification. Are set to one minute, but the time required to extinguish 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 apparent that a part or all of the component of the ignition detecting means 23 or the control means 24 can be constituted by a microcomputer.

[0108]

As described above, according to the first aspect of the present invention, when an ignition occurs in the cooking chamber, the power supply to the heating means is cut off to extinguish the food in the cooking chamber and to the heating means. After that, the power is cut off and the cooking is terminated to prevent the food from being damaged any more, and the user of the appliance removes the cooked food, installs the new food in the cooking chamber, and re-installs the food. When the input means is operated to start heating, heating can be started again and cooking can be performed without separately repairing the device.

According to the second aspect of the present invention, when a plurality of cooking modes are provided and each of the cooking modes is provided with a controlled temperature, the temperature at which ignition is detected for each controlled temperature is determined. In addition, quick and detailed ignition detection corresponding to the cooking mode can be performed.

Further, according to the third aspect of the present invention, even if an ignition occurs in the cooking chamber when the temperature detected by the temperature sensor is lower than the regulated temperature, heating in the cooking chamber is stopped more quickly. And extinguish the fire.

Further, according to the fourth aspect of the present invention, it is possible to simplify the configuration of the ignition detecting means while realizing the effect of the third aspect.

Further, according to the fifth aspect of the present invention, the change in the temperature rise gradient detected by the temperature sensor is detected, and the ignition in the cooking chamber is detected and extinguished more quickly than the fourth aspect of the present invention. be able to.

Further, according to the invention of claim 6, it is possible to prevent the temperature detected by the temperature sensor from fluctuating due to the opening / closing of the door or a fluctuation in the voltage of the commercial power supply, thereby preventing erroneous ignition detection.

Further, according to the invention of claim 7, it is possible to detect the ignition and extinguish the inside of the cooking cabinet even if the ignition occurs in the cooking cabinet immediately after the start of cooking, while realizing the effect of claim 5. it can.

Further, according to the present invention, the ignition is detected based on the change in the temperature rising gradient with respect to the gentlest portion of the temperature rising gradient after the start of cooking, and the detection accuracy of the ignition detecting means is improved. it can.

Further, according to the ninth aspect of the present invention, it is possible to prevent erroneous ignition detection even when the door is opened and closed, and perform ignition detection according to the state of the cooking chamber after the door is closed. be able to.

Further, according to the tenth aspect of the present invention,
Immediately after the door is closed, it is possible to prevent erroneous ignition detection based on a portion where the rising gradient of the temperature detected by the temperature sensor becomes extremely gentle.

Further, according to the eleventh aspect of the present invention,
When the ignition in the cooking cabinet is detected, the flow of the air is suppressed and the inside of the cooking cabinet can be extinguished more quickly and reliably.

According to the twelfth aspect of the present invention,
By disposing the temperature sensor near the exhaust port in the cooking chamber, it is possible to detect ignition in the cooking chamber in a wider range.

According to the thirteenth aspect of the present invention,
Detecting the ignition in the cooking cabinet and suppressing the energization of the heating means or the smoke removing means to extinguish the inside of the cooking cabinet, and waiting for a predetermined time to ensure that the fire in the cooking cabinet is extinguished, and then in the cooking cabinet It is possible to notify that ignition has occurred.

Further, according to the fourteenth aspect of the present invention,
Once the ignition in the cooking chamber is detected and the heating means or the smoke removing means is turned off to extinguish the inside of the cooking chamber, the inside of the cooking chamber is heated again, or the flow of air is generated, leading to ignition Can be prevented.

Further, according to the fifteenth aspect,
If, during heating cooking, the oil accumulates in the saucer at the bottom of the cooking cabinet and the oil smoke filling the cooking cabinet ignites and ignites, after suppressing the heating for the predetermined time and extinguishing the cooking cabinet, Cooking can be resumed by performing high heat heating again. In addition, when the food in the cooking cabinet itself ignites, the heating can be stopped to extinguish the inside of the cooking cabinet, and the heating can be stopped to finish the cooking.

Further, according to the sixteenth aspect of the present invention,
When the ignition is detected at the temperature rising gradient, in addition to the suppression of the heating for the above-described predetermined time, the smoke removal is also suppressed, and after the inside of the cooking chamber is extinguished, the cooking is restarted by performing the high-heat heating and the large-volume smoke removal again. be able to. Further, when ignition is detected based on the absolute value of the temperature, smoke removal is stopped in addition to heating of the cooked food, so that the inside of the cooking cabinet is extinguished, and the heating and the smoke removal can be stopped to finish cooking.

Further, according to the seventeenth aspect,
When the ignition is detected at the temperature rising gradient, the power supply of the heating means or the smoke removing means is suppressed for a predetermined time without driving the notification means, and then the duty ratio of the heating means and the smoke removing means is increased again to use the equipment. It is possible to extinguish the inside of the cooking cabinet during the above-mentioned predetermined time without giving a feeling of strangeness to the cooking, and then resume cooking again. Further, when the ignition is detected at the absolute value of the temperature, the power supply to the heating means or the smoke removing means is cut off and maintained, and after a predetermined time elapses, the notifying means is driven and controlled, and the heating and the smoke removing of the food are stopped to stop the predetermined time. During the time, the inside of the cooking cabinet is extinguished, and after the lapse of the predetermined time, the notification means can notify the user of the appliance that cooking is completed.

[Brief description of the 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 cooking device according to the first embodiment of the present invention.

FIG. 3 is a view for explaining an ignition detection operation at an absolute value of temperature in the cooking device.

FIG. 4 is a block diagram of a cooking device according to a second embodiment of the present invention.

FIG. 5 is a diagram showing an operation display layout in the cooking device.

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

FIG. 7 is a diagram illustrating an ignition detection operation based on a change in a temperature rise gradient in a fourth embodiment of the present invention.

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

FIG. 9 is a diagram illustrating a temperature drop detection operation according to a fifth embodiment of the present invention.

FIG. 10 is a flowchart showing an ignition detection operation based on a change in the temperature decrease gradient and a 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]

 DESCRIPTION OF SYMBOLS 1 Cooking storage 2 Upper heater 3 Lower heater 11 Catalytic filter 12 Catalytic heater 13 Smoke removal fan 16 Temperature sensor 20 Input means 21 Display means 22 Notification means 23 Ignition detection means 24 Control means

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Masayo Hoshi 1006 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. F term (reference) 3L087 AA01 AA06 BB05 BC15 DA03 4B040 AA03 AA08 AB02 AC02 CA05 LA04 LA08 LA17 LA19 LA20 NA13

Claims (17)

[Claims] A heating means for heating the food in the cooking chamber; a temperature sensor for detecting a temperature in the cooking chamber; an input means for inputting a start of cooking; and a temperature detected by the temperature sensor. Ignition detection means for detecting that ignition has occurred in the cooking chamber by being higher than the set ignition detection temperature, a signal input from the temperature sensor and a temperature controlled temperature lower than the ignition detection temperature; The power supply to the heating means is controlled according to the relationship, and the power supply to the heating means is cut off based on a signal input from the ignition detection means, and thereafter maintained, and the heating means is supplied to the heating means based on a signal input from the input means. A heating cooker provided with control means for resuming energization of the heating cooker. 2. A control means comprising a plurality of said regulated temperatures,
2. The cooking device according to claim 1, wherein the ignition detection means includes the ignition detection temperature for each of the plurality of controlled temperatures. 3. A heating means for heating the food in the cooking chamber, a temperature sensor for detecting a temperature in the cooking chamber, and ignition in the cooking chamber based on a rising gradient of the temperature detected by the temperature sensor. A heating cooker comprising: ignition detection means for detecting occurrence; and control means for suppressing power supply to the heating means based on a signal input from the ignition detection means. 4. The heating cooker according to claim 3, wherein the ignition detecting means detects the ignition when a rising gradient of the temperature detected by the temperature sensor is steeper than a predetermined value. 5. The ignition detecting means holds a temperature rise gradient previously detected by the temperature sensor, and the temperature rise gradient detected by the temperature sensor at this time is steeper than a predetermined ratio with respect to the held temperature rise gradient. The heating cooker according to claim 3, wherein ignition is detected based on the result. 6. The cooking device according to claim 5, wherein the ignition detecting means does not make the held temperature rise gradient larger than a predetermined value. 7. The cooking device according to claim 5, wherein the ignition detecting means sets a predetermined value to the held temperature rising gradient at the start of energization to the heating means. 8. The ignition detecting means, when the temperature rise gradient detected by the current temperature sensor is a gentle value with respect to the held temperature rise gradient, sets the held temperature rise gradient to the current temperature rise gradient. 6. The heating cooker according to claim 5, wherein, when the temperature rise gradient detected by the temperature sensor at this time is a steep value relative to the held temperature rise gradient, the held temperature rise gradient is held as it is. . 9. The ignition detecting means is configured to, when detecting that the temperature detected by the temperature sensor decreases, initialize the temperature rise gradient to be re-created and re-create the gradient.
8. The cooking device according to any one of 8 above. 10. The ignition detecting means, when detecting that the temperature detected by the temperature sensor decreases, initializes and re-creates the held temperature rising gradient, and within a predetermined time after detecting the temperature decrease, The heating cooker according to claim 9, wherein updating of the maintained temperature rise gradient is prohibited. 11. A heating means for heating the food in the cooking cabinet, a temperature sensor for detecting a temperature in the cooking cabinet, and a smoke removing device for removing smoke and the like generated in the cooking cabinet to the outside of the cooking cabinet. Means, ignition detection means for detecting that ignition has occurred in the cooking chamber based on a signal input from the temperature sensor, energization control of the heating means and the smoke removing means, and the ignition detection means A heating cooker comprising a control means for suppressing power supply to the heating means and the smoke removing means based on a signal input from the heating cooker. 12. The cooking device according to claim 11, wherein a temperature sensor is disposed near an exhaust port in the cooking chamber. 13. An informing means for performing ignition notification, wherein when the control means detects that an ignition has occurred in the cooking chamber based on a signal inputted from the ignition detection means, the notification means is provided after a predetermined time has elapsed. The heating cooker according to any one of claims 1 to 12, wherein the heating cooker is configured to drive-control the cooking device. 14. The control means detects that an ignition has occurred in the cooking chamber based on a signal input from the ignition detection means, and thereafter controls the heating means regardless of the temperature detected by the temperature sensor. The heating cooker according to any one of claims 3 to 13, wherein the power supply to the smoke removing unit is suppressed. 15. A heating means for heating the food in the cooking chamber, a temperature sensor for detecting a temperature in the cooking chamber, and the cooking chamber based on both a rising gradient and an absolute value of the temperature detected by the temperature sensor. Ignition detection means for detecting that an ignition has occurred within, and a predetermined time when ignition is detected at a temperature rising gradient based on a signal input from the ignition detection means, and controlling the energization of the heating means. After suppressing the energization of the heating means, the energization rate of the heating means is increased again to continue cooking, and when the ignition is detected at the absolute value of the temperature based on the signal input from the ignition detection means, the energization of the heating means is performed. Cooking device provided with control means for suppressing and maintaining the temperature thereafter. 16. A smoke removing device for removing smoke and the like generated in the cooking cabinet to the outside of the cooking cabinet, wherein the control unit supplies electricity to the smoke removing device during cooking of the food in the cooking cabinet. When ignition is detected at the temperature rising gradient based on a signal input from the ignition detection means, the power supply to the smoke removal means is suppressed for a predetermined time, and then the duty ratio of the smoke removal means is increased again to continue cooking. 16. The cooking device according to claim 15, wherein when ignition is detected at the absolute value of the temperature based on a signal input from the ignition detection unit, the power supply to the smoke removing unit is suppressed and maintained thereafter. 17. An informing means for performing ignition notification, wherein the control means controls the drive of the notifying means after a lapse of a predetermined time when the ignition is detected at the absolute value of the temperature based on a signal inputted from the ignition detecting means. 2. The system according to claim 1, wherein when the ignition is detected at the temperature rising gradient based on a signal input from the ignition detecting means, the notifying means is not driven.
The heating cooker according to 5 or 16.