JPH03195824A - Heater for cooking - Google Patents

Abstract

PURPOSE:To simplify the handling method and secure a highly reliable overheating- preventive function by a method wherein, when overheating-preventive control has been manually suspended and temporary high-temperature heating has been effected, an overheating-preventive means is automatically reset to be ready for effecting its overheating-preventive control. CONSTITUTION:When, after the start of cooking, the temperature (tx) of the bottom of a pan, detected by a thermistor 13, has risen to a high point exceeding a set point (ts), a buzzer 15 operates to give a signal, and unless a command to suspend the setting is manually given, the combustion at a burner 1 is automatically extinguished after an elapse of a set standby time T2. If, in acting against the operation of the buzzer 15, the user considers heating at high temperatures above the set point (ts) necessary and manually gives an command to suspend the setting before the set standby time T2 terminates, the buzzer 15 stops signaling and the combustion keeping up the high temperature heating is maintained. When the combustion is thus continued and if, after continuation of the combustion within a set time T1 to reset, the detected temperature (tx) is above the set point (ts) and hence the condition requires an automatic extinguishing means 5A to execute the automatic extinguishment, the buzzer 15 is actuated again and, unless a command to suspend the execution is manually given, the extinguishment of the combustion is executed.

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 uses the temperature of the object to be heated (temperature of the contents of the pot, temperature of the bottom of the pot, etc.) detected by a temperature detection means for the purpose of preventing tempura fires, burning, etc.
The overheat prevention means controls the heating means so that the temperature does not rise higher than the set temperature. Conventionally, this type of cooking heater has an overheat prevention function that prevents overheating when the temperature detected by the temperature detection means exceeds the set temperature. As a control, the heating operation of the heating means is automatically stopped unconditionally, and once the detected temperature rises to the set temperature, as overheat prevention control, the detected temperature is maintained at the set temperature after that (the heating means There was a model that automatically adjusted the amount of heating.

[Problem to be solved by the invention]

However, depending on the content of the 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 detected temperature may be higher than the set temperature. When the set temperature is exceeded, the heating operation of the heating means is automatically stopped, or the heating amount of the heating means is automatically adjusted and the cooking temperature (detected temperature)
The above-mentioned conventional types, in which the temperature is primarily maintained at a set temperature, are extremely inconvenient for cooking.

However, in consideration of such cooking that requires high-temperature heating, it is possible to create a configuration that simply cancels the overheat prevention control by the overheat prevention means, or simply changes the set temperature to a higher temperature side. If you just add the configuration to get −
After canceling the overheating prevention control when a temporary high temperature is required, or changing the set temperature to a high temperature side, it is easy to forget to reset the control, and as a result, it is difficult to prevent tempura from burning or burning during normal use. This results in a lack of reliability in achieving the intended purpose, such as, etc., and also causes problems in operability, such as having to perform the above-mentioned return operation every time the temporary high-temperature heating is completed.

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 simplifying the operation, and to be able to cope with cooking that requires high-temperature heating for a long time. The point is to make it.

[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.

[For production]

In other words, when the user gives an artificial release command to the command receiving means to request a heating state higher than the set temperature, the overheat prevention means performs overheat prevention control (when the detected temperature reaches the set temperature) during the set release time. Controls such as automatic stopping of heating operation when the temperature exceeds the set temperature and heating amount adjustment 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 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 a manual return operation, and extremely high reliability can be ensured in achieving the intended purpose of the overheating prevention function, such as preventing tempura from burning or burning.

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 it.

(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 if the overheating prevention means is not released by the time limit release means until a set standby time elapses after the overheating prevention means is in a state where overheating prevention control is required. Therefore, if this second characteristic configuration is adopted, 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 the recognition by this notification, , - If temporary high-temperature heating is required, the user can then temporarily cancel the schedule by giving a manual release command during the set waiting time until the overheating prevention means starts executing the overheating prevention control. It is possible to appropriately perform high-temperature heating.

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 overheat prevention control will be unexpectedly canceled for the user due to an unnecessary manual release command being given due to an erroneous operation etc. during cooking that requires the overheat prevention control. This effectively prevents unnecessary high-temperature heating.

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 cancellation command. An artificial cancellation command for temporary high-temperature cooking can be given by the operation of moving the object to be heated, such as moving a pot, which is often performed during cooking, and the command receiving means is configured as a normal operation type, such as a push button. The release operation can be made easier compared to the previous version.

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 is in the 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 using the return operation means to return the overheat prevention means to a state in which overheat prevention control can be executed.

〔Example〕

Next, an example will be explained.

Figure 1 shows the control configuration of a stove as an example of a cooking heater, where (1) is a burner, (2) is a trivet on which a pot (A) is placed, and (3) is a gas control system for burner (1). intermittent fuel supply;
and a device stopper for adjusting the amount of gas fuel supplied; (4) is an operating tool for the device stopper; 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, there is an operating tool for appliance plugs (4)
from the intermediate position (a), which is the extinguishing position, to the pushing position (
When the device is pressed down to b), the device plug (3) is opened by the force of the pressing operation, and the device plug switch (6), which is the energizing switch for the controller (5), is closed along with the pushing operation. At the same time, the ignition switch (7) is closed and the igniter (8) is turned on, causing the spark discharge of the spark plug (9) to start the burner (1).
ignites.

When the push-in operation is released, the device plug operating tool (4) moves beyond the intermediate position (a) and moves to the protruding position (c) due to the biasing force.
However, due to the excitation of the electromagnetic coil (11) by the electromotive force of the thermocouple (1O) heated by the burner ignition, the appliance stopper (3) resists the closing force even after the pushing operation is released. The valve is held open, thereby allowing combustion to continue.

Incidentally, if the ignition is ignited incorrectly, or if the ignition goes out or incomplete combustion occurs after ignition, the appliance stopper (3) will automatically close with a closing force due to insufficient electromotive force of the thermocouple (1O).

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

When the appliance spigot operating tool (4) in the protruding position (c) is pushed to the intermediate position (a), which is the extinguishing position, the appliance spigot (3) closes and the burner (1) extinguishes the fire. , the device plug switch (6) is configured to open. In the figure (
12) is a power source battery.

In the controller (5), the temperature at the bottom of the pan (t
x) automatic extinguishing means (5A) that automatically extinguishes the burner (1) based on the temperature becoming higher than the set temperature (ts);
And, the microcomputer (14) is used as a time limit release means (5B) that releases the automatic fire extinguishing control by the automatic fire extinguishing means (5A) for a set release time (Tt) (for example, 1 minute to 3 minutes) based on a manual release command. The automatic fire extinguishing means (5A) function reliably prevents tempura fires and burns during normal cooking, but when performing temporary high-temperature cooking, it is possible to issue a manual release command. By operating the time limit release means (5B), the set temperature (ts
), it is possible to temporarily obtain a heating state higher than that of the

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 temperature detected by the thermistor (13) (tx) is set to (ts)), a buzzer (15) is provided which notifies you by a command from the microcomputer (14), and an automatic fire extinguishing means (
5A) is the state in which it should perform automatic fire extinguishing control (tx
>ts), the set waiting time (Tz) (e.g. 1
The time limit release means (5B
) is configured to execute fire extinguishing control when there is no release.

That is, after the start of cooking, if the temperature of the bottom of the pot (tx) detected by the thermistor (13) becomes higher than the set temperature (ts) (see Figure 3), the buzzer (15) will activate the alarm. If the user does not issue a manual release command, 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 (Tt) due to the need for heating to a higher temperature than the set temperature (ts) for the alarm activation of the buzzer (15), the buzzer (15) At the same time, the 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 during the set release time (T1) (automatic extinguishing means (5A ) is in a state where automatic fire extinguishing control should be executed), the buzzer (15) will activate the alarm again, and in response to this alarm activation, the user will be able to activate the alarm during the set waiting time (T2) to extend the high temperature heating. Whether or not the combustion is to be continued further is determined depending on whether or not the manual release command is given again.

Automatic fire extinguishing by the automatic fire extinguishing means (5A) is achieved by installing a relay switch (17) interposed in the electric circuit (16) connecting the above-mentioned thermocouple (10) and the electromagnetic coil (II) for holding the appliance valve open. (5A) (command from the microcomputer (14)), the device plug (3) is closed by a closing 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 (
The upper and lower rods (19) are attached to the tips of the upper and lower rods (19) that come into pressure contact with the bottom of A) by upward biasing by a spring (18).

In addition, two types of designated receiving means are equipped to receive manual release commands for canceling the automatic fire extinguishing control.One type is a limit that is turned ON by the downward movement of the upper and lower rods (19) and OFF by the upward movement of the upper and lower rods (19). A switch (20) is provided, and when this limit switch (20) goes from an ON state to an OFF state and then returns to an ON state within a predetermined period of time, the microcomputer (14) issues a manual release command for its operation. It is configured to perform judgment processing. That is, when the user cancels the automatic extinguishing control and performs temporary high-temperature heating, the user can give a manual cancellation command by moving the pan (A) up and down.

Furthermore, the other type is a push-button release switch (2
1), and is configured to accept the push operation of this release switch (21) as a manual release command, and the user can perform the above-mentioned assembly up/down movement operation and the push operation of the release switch (21) depending on the work status. In either case, a manual release command can be given.

In the figure, (22) is a temperature setting device, and the temperature adjustment tool (22a
), 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 first compares the new set temperature ([S) with the detected temperature (tx). You may also return to .

[Another example]

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

(b) In the above embodiment, a type of overheating prevention control was adopted in which the burner (1) was automatically extinguished based on the detected temperature (tx) being higher than the set temperature (ts), but the overheating prevention control , After the detected temperature (tx) rises to -Wataru set temperature (ts), the heating amount (burner (1) combustion amount, etc.) is automatically adjusted to maintain the detected temperature (tx) at the set temperature (ts). It is also effective to apply the present invention when a type is adopted.

(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 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 those containers. It may be something that you do.

(d) The command receiving means for receiving the manual cancellation command is configured to detect the movement operation of the heating cooking container (vertical movement operation, horizontal movement operation, It may be of a type (fourth characteristic configuration of the present invention) that receives manual release commands (moving operations, etc.);
It is also possible to provide release operating tools (21) of various operating types, and to use a manual operation for the release operating tools (21) as a manual release command. It's okay.

In addition, when providing a release operation tool that gives a manual release command,
For example, the configuration may be such that the operating tools for various purposes, such as the operating tool for the appliance plug (4) and the temperature adjusting tool for changing the set temperature (22a) in the aforementioned embodiments, are also used as the release operating tool.

(E) The setting release time (T1) for setting the overheat prevention control to the release state by the time limit release means (5B) may be appropriately determined, and the setting release time (T1)
It may be possible to change or adjust it.

(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 ) When adopting the second characteristic configuration of the present invention, in which the overheating prevention control is executed when the overheating prevention control is not canceled by can be adopted.

Further, it is sufficient to appropriately decide how long the above-mentioned set standby time (T2) should be, and furthermore, the set standby time (T2)
It may be possible to change or adjust it.

(g) Instead of configuring the time limit release means (5B) to function as a release only in response to an artificial release command given during the above-mentioned set standby time (T2), the time limit release means (5B) may be activated at any time.
B) may be configured so that it can be canceled in advance before the overheating prevention means (5A) reaches a state in which overheating prevention control is required.

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

(S) A configuration additionally equipped 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+) when the time limit release means (58) is in the releasing function. In addition, when the return operation means is additionally provided, operating tools for other purposes may be used as the manual operation section of the return operation means.

(n) Overheating prevention means (5A) and time limit release means (5A)
Each of B) may be configured using a microcomputer (14) as in the above embodiment, or may be configured 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, in which FIG. 1 is a control block diagram of a stove, FIG. 2 is a circuit diagram, and FIG. 3 is a flow chart. (1)... Heating means, (5A)... Overheating prevention means, (5B)... Time limit release means, (1
3)...Temperature detection means, (15)...
Notifying means, (20)... Command receiving means, (tx
)...Detected temperature, (ts)...Set temperature, (T1)...Setting release time, (T2)...
...Setting standby time.

Claims (1)

[Claims] 1. Temperature detection means (13) for detecting the temperature of the heated object;
And the temperature detected by this temperature detection means (13) (tx
) Overheat prevention means (5A) that controls the heating means (1) to prevent the temperature from becoming higher than the set temperature (ts)
A cooking heater comprising: a time limit for canceling the overheating prevention control by the overheating prevention means (5A) for a set cancellation time (T_1) based on the command receiving means (20) receiving an artificial cancellation command; Release means (
A cooking heater equipped with 5B). 2. A notification means (15) is provided to notify that the overheating prevention means (5A) has reached a state where overheating prevention control is required, and the overheating prevention means (5A) is configured to notify when it has reached a state where overheating prevention control is required. The cooking heater according to claim 1, wherein the cooking heater is configured to execute overheating prevention control if the time limit release means (5B) does not release the time limit until a set standby time (T_2) elapses after the time limit has been released. . 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 (T_2). . 4. The cooking heater according to claim 1, 2 or 3, wherein the command receiving means (20) is configured to receive the moving operation of the object to be heated as a manual cancellation command. 5. A return operation means is provided for returning the overheat prevention means (5A) to a state in which overheat prevention control can be executed during the setting release time (T_1) when the time limit release means (5B) is in the release function. A cooking heater according to claim 1, 2, 3 or 4.