JPS6138322A - Safety device for automatically comtrolled heating cooker - Google Patents

Abstract

PURPOSE:To enhance safety in an automatically controlled heating cooker, by providing a safety timer, which starts counting of time from the time when a heating source starts heating to a material to be cooked, and feeds a signal to let the heating source stop heating after a predetermined time has passed, into a heat controlling means, in a controlling circuit. CONSTITUTION:A safety timer 12 is built in a control circuit 7. It starts counting from the time when it detects that a cock 2 is opened by a switch 2' which is interlocked with the cock 2. It automatically feeds a closing output signal into a safety valve 3 to actuate it to extinguish a burner 5, if the cock 2 is not closed after a predetermined time has passed. When the cock 2 is closed before the safety timer 12 has counted up the preset time, the safety timer is initialized, and it will start counting newly when the cock is opened again. Possibilities such as cooking failure, scorching and fire hazard caused by continuous heating, can be prevented by the titled safety device.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a safety device for automatic control of gas staple stoves, electric openers, and other cooking appliances.

Conventional configuration and its problems In recent years, cooking appliances with automatic control functions have been added to the market at a rate of 4.5% per month. I18 Sue flute 11zul+rza, -Skonrota 1[/r■
Indicates the song song. Figure 1 shows an example of an automatic temperature control device for a gas staple stove. Gas flowing in from gas station 1 is branched into a passage that runs from manual gas station 2 through safety valve 3 to pilot burner 4 and main burner 5. .

A control valve 6 is provided in a passage leading to the main burner 6t, and controls the main burner 5 on and off. Reference numeral 7 is a control circuit that detects that the p-gas stove is in use by a switch 2 interlocked with the gas cock 2, outputs an output to open the safety valve 3, and ignites the pilot burner 4 with an igniter (not shown). A temperature sensor 8 detects the temperature of the food 9 and compares it with the set temperature of the setting variable resistor 10, and outputs an on/off signal for the control valve 6. As a result, the main burner 5 is controlled on and off, but the pilot burner 4 continues to burn while the safety valve 3 is open. 11
The combustion detector detects when the pilot burner 4 misfires or fails to ignite, and the control circuit 7 outputs an output to close the safety valve 3.

Here, when the temperature of the sensor 8 is higher than the set temperature of the variable resistor 10, the main burner 5 is extinguished and only the pilot burner 4 is in a state of combustion. In order to improve cooking performance, it is desired that the pilot burner 4 burns as little as possible, making it difficult for humans to check the combustion of the pilot burner. Therefore, if the user mistakenly assumes that all burners are extinguishing the main burner 5 and removes the food 9, the pilot burner 4 will continue to burn at any time, depending on the state of the sensor 8. This is extremely dangerous as the main burner 5 may also open and cause a fire. The same thing would happen if you put the dough in a gas oven or electric stove.

OBJECT OF THE INVENTION The present invention solves the above-mentioned conventional problems.
The purpose of this invention is to provide a highly safe automatic control cooker that automatically stops all heat sources after a certain period of time even if the heat source is removed.

Structure of the Invention In order to achieve the above object, the present invention provides a heating source for heating food, a heating control means for controlling this heating, and a control circuit for controlling the heating source according to a predetermined control sequence. The control circuit is provided with a safety timer which starts measuring time from the time when the heating source starts heating the food, and outputs a signal to the heating control means to stop heating the heating source when a predetermined period of time has elapsed.

With this configuration, heating of the food is automatically stopped after a certain period of time has passed after the stove is used, thereby preventing any danger from occurring.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 2 and 3. FIG. 2 is a system diagram showing an example in which the present invention is applied to a gas stove. In Figure 2, parts that are the same as those in Figure 1 are marked with the same symbols. The control circuit 7 has a built-in safety timer 12, and the safety timer 12 is controlled by the switch 2 which is linked to the cock 2.
Counting starts from the time it is detected that the cock 2 is opened, and if the cock 2 is not closed even after a predetermined period of time has elapsed, a closing output is automatically sent to the safety valve 3 to extinguish the burner 5. Although the predetermined time of the safety timer 12 differs depending on the cooker, by selecting a time longer than the time used for normal cooking, the user may feel inconvenienced. It is thought that about 2 hours is preferable for stovetops, open doors, etc.

FIG. 3 shows this schematic flow diagram. Kosokunuisochi 2'
Immediately after turning on, the safety timer 12 starts, and the safety valve 3 and control valve 6 are opened. (Cooking start section ■) Normally, the temperature sensor 8 and the set temperature 10 are compared, and the roof flow passes through the control valve 6 and the temperature control section II which controls opening and closing. The loop ■ includes a burner extinguishing section IY that closes the safety valve 3 when the cock 2 is closed midway or when the burner 5 misfires, and a safety timer 12 is preset in this burner extinguishing section lv. The structure also has a function of closing the safety valve 3 when the time count is completed. When the cock 2 is closed before the safety timer 12 counts up the time, the safety timer is initialized, and when the cock is opened again, the safety timer is reset.

In the above embodiment, an example was explained in which the present invention was applied to a temperature controller for a gas stove, but it can also be applied to a cooking device that does not control a gas stove or an electric stove.

As described above in detail, the safety device of the automatically controlled heating cooker of the present invention is equipped with a safety timer that automatically stops heating when a certain period of time has passed after the start of cooking. It has the effect of preventing cooking failure, scorching, fire, etc. from continuing to heat up indefinitely even if you forget that you are cooking in a container and go to another place, and furthermore Since unnecessary fuel consumption at this time can be prevented, it has great effects in terms of both safety and economy, and can be applied to a wide range of heating cookers in general, so it is of great importance to the industrial world.

[Brief explanation of the drawing]

Fig. 1 is a system diagram showing a conventional example of a temperature-controlled gas staple stove, and Fig. 2 is an automatic Hi-Fi system diagram showing an embodiment of the present invention.
FIG. 3 is a control system diagram in which the safety device of a gas stove is applied to a gas staple stove. FIG. 3 is a schematic flow diagram showing the operation of the control g4 circuit. (heating source), 6... control valve (heating control means),
7...Control circuit, 12...Safety timer. Name of agent: Patent attorney Toshio Nakao (1st person)
Figure 2 Figure 93

Claims (1)

[Claims] It has a heating source that heats the food to be cooked, a heating control means that cuts the heating source on and off, and a control circuit that controls the heating source according to a predetermined control sequence, and the control circuit is configured to control the heat source when the heating source starts heating. A safety device for an automatically controlled heating cooker configured to include a safety timer that starts time measurement and outputs a signal to the heating control means to stop heating the heating source when a predetermined time has elapsed.