JPH0332689B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a gas stove with a timer that automatically stops combustion when an arbitrarily set time has elapsed.

Conventional configuration and its problems Conventionally, there are few gas stoves with a timer function on the market, and a gas stove with a timer as shown in FIG. 1 can be considered.

FIG. 1 shows a conventional gas table stove 1 provided with a spring-driven timer 2, and its configuration is as shown in FIG. 2.

In FIG. 2, gas is supplied from an inlet 3, passes through a gas tank 4, a safety valve 5, and reaches a burner 6 where it is combusted. The safety valve 5 is opened in conjunction with the main knob 4', and the thermoelectromotive force of the thermocouple 7 heated by the burner 6 energizes the coil 5', so that the electromagnetic force keeps the valve open. Here, the timer is operated by the driving force of the mainspring, and when set to any position using knob 2', the timer contact 8
It is configured to close. The thermoelectromotive force of the thermocouple 7 is short-circuited by the contact 8, and no current flows through the coil 5', so the safety valve 5 is activated by a spring (not shown).
The structure is such that it closes with the force of , stopping the gas.

Generally, a spring timer or a motor timer has a structure in which a gear is rotated by the power of a spring or a motor, so it is quite possible that the timer will not operate due to dust clogging, broken springs, motor failure, etc. Furthermore, recent digital timers and the like may run out of control or be damaged due to external noise or static electricity. If a failure like this occurs while using a gas table stove, burner 2
The fire will not be extinguished and may cause burning or damage to the pot.
There was a problem in that if tempura oil or the like was heated for a long time, it would reach a high temperature, creating a very dangerous situation such as a fire caused by the oil igniting.

OBJECTS OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems and provide a gas table stove with a timer that is fail-safe even if a timer failure occurs.

Structure of the Invention In order to achieve this object, the gas table stove with a timer of the present invention measures time from the start of combustion of the burner with a control valve provided in the gas passage leading to the burner, and measures the time set by the timer setting section. A timer that outputs a signal to close the control valve when the signal matches, a display that displays this, and a safety timer that operates simultaneously with this timer and outputs the time to close the control valve at a predetermined time. did.

With this configuration, even if either of the two timers fails, the other timer will back up and combustion will not continue indefinitely.

DESCRIPTION OF EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS. 3 and 4. The embodiments in this specification will be explained using a digital timer that uses a microcomputer as a timer as an example. , , the present invention is effective even when using a spring timer or a motor timer.

FIG. 3 is a diagram illustrating the configuration of the gas table stove with timer of the present invention.

The gas passes through an inlet 3, a gas tank 4, a control valve 9, and is burned in a burner 6. The Kotoku 4 has an opening/closing contact 4'' that operates in conjunction with this, and sends an opening/closing signal of the Kotoku to the controller 10.The controller 10 is operated by a DC power source (for example, a dry battery) 11, and has an internal timer 12, a safety timer 13, and a clock counter. 14. The controller 10 sends the value of the timer 12 to the display section 15. Here, a digital display section using a liquid crystal or the like is used, but a bar graph or an analog display is used. Reference numeral 16 denotes a timer time setting section, which is configured to be set using pushbuttons 16a and 16b.The controller 10 also outputs an output from a buzzer 17 and an on/off signal for the control valve 9 as necessary. It is structured as follows.

FIG. 4 shows a circuit diagram of the main parts of the controller 10. The timer 12 is operated by the opening/closing contact 4'' of the switch 4. The timer 12 is composed of a microcomputer or a dedicated LSZ, and measures the time by counting the frequency of the crystal oscillator 18, and outputs it to the display section 15. Also, the setting section 16 inputs a setting signal from , and if this and the value of timer 12 match, it outputs a signal to close control valve 9. In the figure, port O is set to low. At this time, an alarm output is output to buzzer 17 as necessary. .

The safety timer 13 is preset to the maximum time that can be set by the timer 12, and is operated by the switching contact 4''.The safety timer is configured to count a CR oscillator using a capacitor 19 and a resistor 20.
When the time set by the safety timer 13 elapses, the output T becomes a high output. This causes the transistor 21 to conduct and closes the control valve 9 regardless of the movement of the timer 12. The timer 12 and the safety timer 13 are initialized by opening the opening/closing contact 4'' and wait for the next operation.

With the above configuration, even if the timer 12 is damaged for some reason and port O no longer becomes low, combustion will not stop unless the safety timer 13 breaks down. On the other hand, even if the safety timer 13 is damaged, there is no danger because the timer 12 is operating normally.

The present invention is effective even if the timer 12 is a motor timer or a spring timer.

Effects of the Invention The gas stove with a timer of the present invention has a timer function that extinguishes the burner when a set time is reached, and also has a safety timer that operates in a separate system from this timer, so that one of the timers will not malfunction or break down. This is a configuration in which the burner is backed up by the other timer, which prevents the burn from continuing indefinitely and prevents the cooking from burning, damage to the pot, or ignition due to heat caused by an abnormality in the frying oil. Has useful effects.

[Brief explanation of drawings]

Fig. 1 is an external perspective view of a conventional gas table stove with a timer, Fig. 2 is its configuration diagram, Fig. 3 is a configuration diagram of a gas table stove with a timer according to an embodiment of the present invention, and Fig. 4 is Fig. 3 FIG. 2 is a circuit diagram of the main parts of the controller. 6...burner, 9...control valve, 12...timer,
13...Safety timer, 15...Display section, 16...Timer setting section.

Claims (1)

[Claims] 1. A burner that burns gas to heat and cook the food, a control valve provided in the gas passage leading to the burner, and a time measurement that starts from the start of combustion of the burner and matches the time set by the timer setting section. a timer that outputs a signal to close the control valve when the control valve is closed, a display unit that displays the operation of the timer, and a timer that operates simultaneously with the timer and measures time using a signal different from the timer, A gas stove with a timer configured to include a safety timer that outputs a signal to close the control valve.