JPH0581804B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention includes a temperature detection means for detecting the temperature of an object to be heated, and a method for preventing the temperature detected by the temperature detection means from becoming higher than a set temperature. The present invention relates to a cooking heater equipped with an overheating prevention means for controlling the heating means.

[Conventional technology]

The above-mentioned cooking heater is designed so that the temperature of the object to be heated (the temperature of the contents of the pan, the temperature of the bottom of the pan, etc.) detected by the temperature detection means is lower than the set temperature for the purpose of preventing tempura fires and scorching, for example. Conventionally, in this type of cooking heater, when the temperature detected by the temperature detection means exceeds the set temperature, the heating means is controlled by the overheat prevention means to prevent the temperature from reaching a high temperature. The type that automatically stops the heating operation unconditionally, and the type that automatically stops the heating operation unconditionally, and once the detected temperature rises to the set temperature, the heating amount of the heating means is adjusted to maintain the detected temperature at the set temperature as an overheat prevention control. There is a model that automatically adjusts.

[Problem to be solved by the invention]

However, depending on the content of cooking, there may be cases where it is desired to temporarily obtain a heating state higher than the set temperature (for example, temporary high-heat cooking for stir-frying Chinese food), and in such cases, the detection When the temperature exceeds the set temperature, the heating operation of the heating means may be automatically stopped, or the heating amount of the heating means may be automatically adjusted so that the cooking temperature (detected temperature) is uniquely the set temperature. The above-mentioned conventional types, which are often maintained, are extremely inconvenient for cooking.

However, in consideration of such cooking that requires temporary high-temperature heating, it is possible to create a configuration in which the overheat prevention control by the overheat prevention means is simply canceled, or it is possible to simply change the set temperature to a higher temperature side. If such a configuration is simply added, it is easy to forget to reset the overheating prevention control after a temporary high temperature is required, or after changing the set temperature to a high temperature side. This results in a lack of reliability in achieving the intended purpose, such as preventing tempura from burning or burning during use, and it is cumbersome to perform the above reset operation every time temporary high-temperature heating ends. This also causes problems with operability.

The purpose of the present invention is to ensure high reliability in achieving the desired objectives such as preventing fires and non-stick cooking of tempura, while also simplifying the operation and making it possible to deal with cooking that requires temporary high-temperature heating. The point is to make it so.

[Means to solve the problem]

A first characteristic configuration of the cooking heater according to the present invention includes a temperature detection means for detecting the temperature of the object to be heated, and a temperature detection means for preventing the temperature detected by the temperature detection means from becoming higher than the set temperature. In the configuration including an overheat prevention means for controlling the heating means, a time limit release means is provided for canceling the overheat prevention control by the overheat prevention means for a set release time based on the command receiving means receiving an artificial release command. Its functions and effects are as follows.

[Effect]

In other words, when the user issues an artificial release command to the finger cooling receiving means to request a heating state higher than the set temperature, the overheat prevention means performs overheat prevention control (detected temperature Controls such as automatically stopping the heating operation when the temperature exceeds the set temperature, and adjusting the heating amount to maintain the detected temperature at the set temperature are canceled by the time release means, and during that time, cooking at a higher temperature than the set temperature is disabled. becomes possible.

Moreover, since the above-mentioned release by the time limit release means is limited in time, the overheat prevention means automatically returns to a state in which the overheat prevention control can be executed thereafter.

〔Effect of the invention〕

As a result of the above operations, according to the first characteristic configuration of the present invention, after the overheating prevention control is canceled and temporary high temperature heating is performed, the overheating prevention means automatically returns to the executable state of the overheating prevention control. The operation is simpler than those that require manual return operation, and it is said to be effective in preventing fires and burning of tempura.
Extremely high reliability can be ensured in achieving the intended purpose of the overheating prevention function.

In this way, while ensuring high reliability in achieving the intended purpose, it is possible to perform temporary high-temperature cooking at a higher temperature than the set temperature whenever necessary, greatly increasing the convenience of cooking. I was able to improve.

(Second to Fifth Characteristic Structures of the Present Invention and Their Effects) A second characteristic structure of the present invention is to provide a notification means for notifying that the overheat prevention means has reached a state in which overheat prevention control is required. , the overheating prevention means is configured to execute the overheating prevention control when the time limit release means does not release the overheating prevention means until a set standby time has elapsed after the overheating prevention means has reached a state in which overheating prevention control is required. By adopting this second characteristic configuration, the user can accurately recognize by the notification that the overheating prevention means has reached the state where overheating prevention control is required, and Based on this, if temporary high-temperature heating is required, the user shall then issue a manual release command during the set waiting time until the overheating prevention means starts executing the overheating prevention control. Temporal high temperature heating can be carried out appropriately.

A third characteristic configuration of the present invention resides in that the time limit release means is configured to perform a release function only in response to an artificial release command given during the set standby time, When implementing the characteristic configuration, if this third characteristic configuration is adopted, the user will be prevented from unexpectedly overheating due to an unnecessary manual release command being given due to an erroneous operation etc. during cooking that requires overheating prevention control. It is possible to effectively prevent the prevention control from being canceled and unnecessary high-temperature heating being performed.

A fourth characteristic configuration of the present invention resides in that the command receiving means is configured to receive the movement operation of the object to be heated as a manual release command. If this fourth characteristic configuration is adopted, cooking can generally be performed. It is possible to give an artificial cancellation command for temporary high-temperature cooking by simply moving the object to be heated, such as moving a pot, which is often performed during cooking. The release operation can be simplified compared to the configuration shown in FIG.

A fifth characteristic configuration of the present invention is that a return operation means is provided for returning the overheat prevention means to a state in which overheat prevention control can be performed during the setting release time when the time limit release means has a release function. If this fifth characteristic configuration is adopted, if there is still time remaining in the setting release time after the temporary high temperature cooking is completed by canceling the overheat prevention control, the high temperature will be increased by continuing to cancel the overheat prevention control. Unnecessary continuation of the heating state can be avoided by having the return operating means to return the overheating prevention means to a state in which overheating prevention control can be executed.

〔Example〕

Next, an example will be described.

FIG. 1 shows the control configuration of a stove as an example of a cooking heater, in which 1 is a burner, 2 is a trivet on which pot A is placed, 3 is an intermittent supply of gas fuel to burner 1,
and a device plug for adjusting the gas fuel supply amount; 4 is an operating tool for the device plug; and 5 is a controller.

Further, FIG. 2 shows the internal circuit configuration of the controller 5.

As for the operation configuration for ignition and extinguishing, when the appliance spigot operating tool 4 is pushed from the intermediate position a, which is the extinguishing position, to the push-in position b, the appliance spigot 3 is opened by the pushing operation force, and , With the push-in operation, the appliance tap switch 6, which is the energization switch for the controller 5, is closed, the ignition switch 7 is closed, and the igniter 8 is turned on.
As a result, the burner 1 is ignited by the spark discharge from the ignition plug 9.

When the pushing operation is released, the device plug operating tool 4
is projected beyond the intermediate position a to the protruding position c by the urging force, but the electromagnetic coil 11 is generated by the electromotive force of the thermocouple 10 heated by the burner ignition.
Due to the excitation of the device plug 3, even after the pushing operation is released,
resists the closing force and is held open, thereby continuing combustion.

In addition, if the ignition is a mistake, or if the ignition goes out or incomplete combustion occurs after ignition, the thermocouple 1
Due to the lack of electromotive force of 0, the appliance stopper 3 automatically closes due to the closing force.

When the instrument plug operating tool 4 is in the protruding position c, the instrument plug switch 6 is held in the closed state.
Further, by rotating the appliance plug operating tool 4 located at the protruding position c, the degree of opening of the appliance plug 3 can be adjusted to adjust the firepower.

When the appliance spigot operating tool 4 at the protruding position c is pushed to the intermediate position a, which is the extinguishing position, the appliance spigot 3 is closed, the burner 1 is extinguished, and the appliance spigot switch 6 is opened. be. 12 in the figure is a power source battery.

The controller 5 automatically extinguishes the burner 1 based on the temperature tx of the bottom of the pan detected by the thermistor 13 as a temperature detection means being higher than the set temperature ts, as an overheat prevention control to prevent tempura from catching fire or burning. Automatic fire extinguishing means 5
A, and automatic fire extinguishing means 5 based on manual release command
A time limit release means 5B is configured by using a microcomputer 14 to release the automatic fire extinguishing control by A for a setting release time T ₁ (for example, 1 minute to 3 minutes), and the function of the automatic fire extinguishing means 5A is disabled during normal cooking. While reliably preventing tempura fires and burning, when temporarily cooking at high temperatures, the time limit release means 5B can be activated by issuing a manual release command to prevent tempura from rising to a temperature higher than the set temperature ts. It is designed so that a heated state can be obtained temporarily.

In configuring the automatic fire extinguishing means 5A, when the automatic fire extinguishing means 5A reaches a state where automatic fire extinguishing control should be executed (specifically, the thermistor 13
When the detected temperature tx becomes higher than the set temperature ts), a buzzer 15 is provided which notifies you by a command from the microcomputer 14, and the automatic fire extinguishing means 5A executes automatic fire extinguishing control. After reaching the plow state (tx > ts), the extinguishing control is executed when the time limit release means 5B does not release the time limit until a set standby time T ₂ (for example, about 10 seconds) has elapsed. be.

That is, after the start of cooking, when the temperature tx of the bottom of the pot detected by the thermistor 13 becomes higher than the set temperature ts (see Fig. 3), the buzzer 15 activates the alarm.
On the other hand, if the user does not issue a manual release command, the automatic extinguishing control is executed and the burner 1 is automatically extinguished after the set standby time _T2 has elapsed.

On the other hand, if the user issues a manual cancellation command during the set standby time T ₂ due to the need for heating to a higher temperature than the set temperature ts, the alarm operation of the buzzer 15 will be stopped. With,
Automatic fire extinguishing control is canceled and combustion continues for high temperature heating.

In addition, when a manual release command is given and combustion is continued, the detected temperature tx is higher than the set temperature ts after the combustion continues for the set release time _T1 (the automatic fire extinguishing means 5A executes automatic fire extinguishing control). If the condition is 1), the buzzer 15 activates the alarm again, and it is determined whether or not the user issues a manual release command again to extend the high-temperature heating during the set standby time _T2 for this alarm activation. Depending on this, it is determined whether or not the combustion should be continued further.

Automatic fire extinguishing by the automatic fire extinguishing means 5A is performed by issuing a command from the automatic fire extinguishing means 5 (command from the microcomputer 4) to a relay switch 17 installed in the electric circuit 16 connecting the above-mentioned thermocouple 10 and the electromagnetic coil 11 for holding the appliance valve open. This is done by opening the device plug 3 with a biasing force.

On the other hand, the thermistor 13 as a temperature detection means for detecting the temperature tx of the bottom of the pot is connected to the pot A placed on the trivet 2.
The upper and lower rods 19 are attached to the tips of the upper and lower rods 19, which are pressed into contact with the bottom of the upper and lower rods 19 by the upward bias of the springs 18.

In addition, two types of designated receiving means are equipped to receive manual release commands for canceling automatic fire extinguishing control, and one type is turned on by lowering the upper and lower rods 19.
In addition, a limit switch 20 that is turned off by upward movement is provided, and this limit switch 20 is turned on.
The microcomputer 14 is configured to determine that when the switch is turned OFF and then turned ON again within a predetermined period of time, the microcomputer 14 determines that the operation is a manual release command. That is, when the user cancels the automatic extinguishing control and performs temporary high-temperature heating, the user can manually give a cancellation command by moving the pan A up and down.

Furthermore, the other type is equipped with a push-button release switch 21, and is configured to accept a push operation of the release switch 21 as a manual release command, allowing the user to perform the above-mentioned pan up and down movement operations, and , the manual release command can be given by pressing the release switch 21.

22 in the figure is a temperature setting device, and the temperature adjustment tool 22
By the operation a, the set temperature ts can be changed as appropriate.

Further, 23 is a voltage monitoring reset circuit whose purpose is to avoid control problems caused by a voltage drop in the battery 12.

In this embodiment, if the set temperature ts is changed during the set standby time _T2 , the control flow may temporarily return to comparing the new set temperature ts and the detected temperature tx. .

[Another example]

Next, other embodiments of the present invention will be listed.

(b) In the above embodiment, as overheating prevention control,
We adopted a model that automatically extinguishes burner 1 based on the detected temperature tx being higher than the set temperature ts, but as overheat prevention control, the detected temperature (tx)
The present invention applies when a type is adopted in which the amount of heating (combustion amount of burner 11, etc.) is automatically adjusted to maintain the detected temperature (tx) at the set temperature (ts) after the temperature has once risen to the set temperature (ts). It is also effective to apply.

(b) The present invention is applicable not only to stoves but also to various cooking heaters such as ovens and fish fryers, and the heating means is not limited to gas burners, but also types that use liquid fuel, solid fuel It is possible to adopt various heating types such as a type that uses , or an electric heating type.

(c) The temperature detection means for detecting the temperature of the object to be heated may be one that detects the temperature of a cooking container such as a pot, or may detect the temperature of the contents in such a container. It may be something you do.

(d) The command receiving means that receives the manual release command is configured to detect movement of the cooking container (vertical movement or horizontal movement), such as detecting movement of pot A using a trivet 2. etc.) as a manual release command (the fourth characteristic configuration of the present invention), or a type in which release operating tools 21 of various operation types are provided and manual operations for the release operating tools 21 are provided as manual release commands. Furthermore, one of these two types may be used alone or in combination.

In addition, when providing a release operation tool that gives a manual release command, for example, the tool 4 in the above embodiment
An operation tool for various purposes such as a temperature adjustment tool 22a for changing the set temperature may also be used as a release operation tool.

(e) The setting release time _T1 for setting the overheating prevention control to the released state by the time limit release means 5B may be determined as appropriate, and the setting release time _T1 may be changeable and adjustable. .

(f) When the overheating prevention means 5A reaches a state where overheating prevention control is required, the notification means is activated, and the time limit release means 5B does not release the alarm from that point until the set standby time _T2 has elapsed. When employing the second feature of the present invention, in which overheating prevention control is executed at certain times, various notification forms other than the buzzer 15, such as a lamp display or an audio notification, can be used as the notification means.

Further, it may be determined as appropriate whether to set the waiting time to the above setting waiting time T ₂ or the like, and furthermore, the setting waiting time T ₂ may be changeable and adjustable.

(G) Instead of configuring the time limit release means 5B to perform the release function only in response to an artificial release command given during the above-mentioned set standby time _T2 , it is possible to cause the time limit release means 5B to perform the release function at any time. As a possible configuration, it may be possible to cancel the overheating prevention means 5A before the overheating prevention control is required.

(H) A configuration may be adopted in which the above-mentioned notification means is omitted.

(li) A configuration may be additionally provided with a return operation means for returning the overheating prevention means 5A to a state in which overheating prevention control can be performed during the setting release time T ₁ during which the time limit release means 5B is performing the release function;
When the return operation means is additionally provided, operating tools for other purposes may also be used as the manual operation section of the return operation means.

(J) Overheating prevention means 5A and time limit release means 5B
Each of them may be constructed using the microcomputer 14 as in the above-mentioned embodiment, or may be constructed using a sequence circuit.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of drawings]

1 to 3 show embodiments of the present invention,
Figure 1 is a control configuration diagram of the stove, Figure 2 is a circuit diagram,
Figure 3 is a flowchart. 1...Heating means, 5A...Overheating prevention means, 5B
... Time limit release means, 13 ... Temperature detection means, 15
...Notification means, 20...Command receiving means, tx...Detected temperature, ts...Set temperature, _T1 ...Setting release time,
T ₂ ...Setting standby time.

Claims (1)

[Claims] 1. Temperature detection means 1 for detecting the temperature of a heated object
3, and the temperature detected by this temperature detection means 13
The cooking heater is equipped with an overheating prevention means 5A that controls the heating means 1 so as to prevent tx from becoming higher than the set temperature ts, and based on the command receiving means 20 receiving a manual release command, A cooking heater provided with a time limit release means 5B for releasing the overheat prevention control by the overheat prevention means 5A for a setting release time _T1 . 2. A notification means 15 is provided to notify that the overheating prevention means 5A has reached a state in which overheating prevention control is required, and after the overheating prevention means 5A reaches a state in which overheating prevention control is required, a set standby time T is set. _2. The cooking heater according to claim 1, wherein the overheat prevention control is executed when the time limit release means 5B does not release the time limit until 2 elapses. 3. The cooking heater according to claim 2, wherein the time limit release means 5B is configured to perform a release function only in response to an artificial release command given during the set standby time _T2 . 4. The cooking heater according to claim 1, wherein the command receiving means 20 is configured to receive the moving operation of the object to be heated as a manual release command. 5. Claims 1 and 2, further comprising a return operation means for returning the overheat prevention means 5A to a state in which overheat prevention control can be performed during the setting release time _T1 during which the time limit release means 5B is in the release function. The cooking heater according to 3 or 4.