JPS5854561Y2 - Stove - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a new type of cooking stove that uses a battery-powered temperature detector to detect and notify the temperature of food to be cooked.

Conventional stoves only have the function of burning, making them inconvenient for actual cooking.

For example, when heating red light milk, you need to take the pot off the heat and check the temperature several times.

Tempura oil and other oils will oxidize if the temperature is raised too high, rendering them useless.

Even when boiling potatoes, I often boil them and crush the pot.

Cooking is difficult, and the current situation is that housewives manage it with their years of experience and careful attention.

Therefore, the temperature at the bottom of the pot (usually equal to the temperature of the food being cooked)
It can be imagined that it would be very convenient if a function to detect the above was added, and some devices have this function, but all of them use commercial power.

This is inconvenient because it cannot be used unless there is an outlet nearby, and the power cord can be corroded by oil, acid, and other substances generated from cooking, and depending on the wiring, it can melt due to the heat of combustion, which can lead to electrical leakage. There was a risk of fire, and there were problems with installation conditions and safety.

The present invention solves all of the above problems by adding a temperature detection function using a dry battery power source and a configuration that reduces battery consumption, making it possible to provide an easy-to-use and convenient stove. This will be explained with the attached drawings.

In FIG. 1, 1 is the stove body, 2 is a burner, and 3 is a trivet. When a pot is placed on the trivet 3, a temperature sensor 4 comes into contact with the bottom of the pot to detect the temperature.

5 is a gas cock and igniter, which ignites the burner 2 by turning it to the left.

6 is a temperature setting dial, 7 is a notification buzzer, 8
is a button for checking the temperature.

Its control function will be explained according to FIG.

9 is a dry battery power source, and when the cock 5 is opened, the power switch 10 is closed in conjunction with this.

Reference numeral 11 is a dry battery voltage comparator, which compares it with the circuit operation performance guaranteed voltage 12, and if the dry battery voltage is high, the timer 1
3 is activated, the buzzer 7 is sounded for a certain period of time (for example, 0.5 seconds) via the OR circuit 14, and the user is informed that the power has been turned on normally and that the dry cell battery is not exhausted.

When using a commercial power source, it is normal to use a power lamp to indicate when the power is turned on.However, since dry battery power does not have a long lifespan, an alarm similar to a power lamp can be used by making an alarm for a certain period of time when the cock is turned. We take care to ensure that confirmation is possible.

If the switch 10 is malfunctioning and there is no power, or if the battery is exhausted and the voltage has dropped below the guaranteed performance voltage, the buzzer 7 will not sound, but the user will be alerted to the problem of the switch or the need to replace the battery. By being aware of this, you can also recognize that the temperature detection performance may have some degree of error, and you can prevent cooking failures.

Reference numeral 15 denotes a temperature signal comparison circuit, which compares the temperature sensor signal 16 and the temperature setting value 17, activates the timer 18 the moment the pot bottom temperature becomes higher than the temperature setting, and activates the buzzer 7 for a certain period of time via the OR circuit 14. A sound is emitted (for example, for 5 seconds) to notify the user that the food has reached the set temperature.

In either case, the buzzer 7 only sounds for a certain period of time to prevent unnecessary battery consumption.

Reference numeral 8 denotes a temperature confirmation button switch. After the buzzer 7 detects that the set temperature has been reached, the user can press this switch 8 to check the temperature of the food again.

If the temperature of the food to be cooked is higher than the set temperature, the buzzer 7 will sound only while this switch 8 is pressed, and if it is lower, it will not sound.

Therefore, while pressing this switch 8, you can slowly turn the temperature setting dial 6 and listen for the sound of the buzzer 7 starting to sound, and you can check the temperature of the food at that point, which is very convenient. At the same time, it is possible to recognize the degree of necessity for adjusting firepower according to temperature differences.

Furthermore, since the buzzer 7 sounds only when the switch 8 is pressed, battery consumption can be kept to a minimum.

FIG. 3 shows an embodiment of this control circuit.

9 is a battery, 10 is a power switch, 7 is a buzzer with a built-in oscillation circuit, 8 is a button switch for temperature confirmation, 19 is a temperature dial, a volume linked with 6, and 4 is a temperature sensor (in this example, a thermocouple) .

20, 21° 22.23 C, t-7' collector comparator, 24 H operational amplifier.

First, when the switch 10 is turned on in conjunction with the cock 5, if the battery voltage is appropriate, the comparator 21 does not invert, and the buzzer 7 detects the voltage at the capacitor 27 until the voltage determined by the resistors 25 and 26 is reached by the comparator 20. It sounds only while the is rising (for example, 0.5 seconds).

If the battery voltage is depleted below the value required for circuit operation, the comparator 21 is inverted because the voltage determined by the resistor 28 and 29 is lower than the reference voltage at the negative terminal, and the voltage at the negative terminal of the comparator 20 is is grounded and does not reverse, so the buzzer 7 does not sound even when the switch 10 is turned on.

Here, the reference voltage of the comparator 21 is determined by 30 Zener diodes and is shared with an accurate temperature detection bridge to be described later, so the number of components can be reduced.

Therefore, it is very convenient because the notification of energization and the appropriate value of the battery voltage can be notified simultaneously and accurately.

Next, explaining the temperature signal comparison circuit, the electromotive force of the sensor 4 is inverted and amplified by the operational amplifier 24.

The reference voltage of the operational amplifier is determined by a Zener diode 30 and resistors 31, 32, and 33.

A thermistor 34 compensates for the cold junction of the sensor 4 and compensates for circuit temperature characteristics.

The electromotive voltage amplified by the operational amplifier is compared with the voltage set by resistors 35, 36 and volume 19 by comparator 23.

In other words, while the temperature of the sensor 4 is low, the comparator 23
is not reversed, but is reversed when the temperature reaches the set value.

Next, when the comparator 23 is inverted, the positive terminal voltage of the comparator 22 becomes lower than the minus terminal voltage determined by the resistors 28 and 29, so the comparator 22 is inverted and the buzzer 7 starts sounding.

However, since the capacitor 37 is charged through the resistor 38 and becomes higher than the negative terminal voltage of the comparator 22 after about 5 seconds, the inversion of the comparator 22 is stopped and the buzzer 7 stops sounding.

Therefore, unnecessary battery consumption is prevented. After the comparator 22 operates, the capacitor 37 is charged and the buzzer 7 does not sound, but by pressing the confirmation button switch 8,
If the temperature is higher than the set value, the comparator 23 is inverted, so the buzzer can sound regardless of the operation of the comparator 22.

As mentioned above, the present invention greatly improves cooking functionality by having a function that automatically notifies you when the food reaches the set temperature, and a function that allows you to check the temperature using the button switch for temperature confirmation even after the notification has been made. Moreover, since it adopts a method that prevents unnecessary power consumption and can be controlled using dry battery power, the stove can be installed anywhere, and safety can be greatly improved without worrying about electrical leakage or fire.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a stove showing an embodiment of the present invention, FIG. 2 is a control block diagram, and FIG. 3 is a circuit diagram. 1...Stove body, 4...Temperature sensor, 7...Notification means (buzzer), 8...
Confirmation switch (button switch for temperature confirmation), 9...
····battery.

Claims (1)

[Scope of utility model registration request] A temperature sensor that detects the temperature of the cooking container installed in the stove body, a battery for driving the control circuit, and when the power switch is turned on,
means for notifying for a certain period of time that the power is turned on and that the battery voltage is at an appropriate value; a means for notifying for a certain period of time when the temperature detected by the sensor reaches a set value; and the temperature detected by the sensor during cooking is set. A stove consisting of a control circuit that has a confirmation switch that can determine whether the value is higher or lower than the value.