JPS5849251B2 - automatic boiling pot - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an automatic boiling pot that has a function of detecting and notifying the heating state of food by detecting the temperature of steam generated from the food being heated in the automatic boiling pot. It is.

Conventionally, cooking using a pot involves placing food in a pot, heating it with a heat source such as a gas or electric stove, and then removing the lid at any time after an appropriate amount of time and checking the heating status of the food in the pot. We are taking the approach of recommending.

When using such heating cooking methods, the finished state of the food depends on the cooking experience and skill level.

In addition, it is often inconvenient that the lid of the food being heated must be removed frequently to check the doneness of the food, which often results in being tied up next to the pot while it is being heated.

One way to eliminate this inconvenience is to set a timer at the start of cooking, but it is also recommended to set an appropriate heating time on the timer, taking into account factors such as the amount of food, finished state, and heat capacity of the heat source. It's not easy to set up.

The present invention relates to a pot for simmering food based on the principle of detecting the temperature of water vapor generated when food is boiled to notify the heating state of the food.

According to the present invention, it is possible to notify when the heating state of the food reaches a constant state (boiling state) without depending on the amount of food, initial temperature, or heat amount of the heating source.

Therefore, the heating state of the food can be accurately known.

FIG. 1 shows the structure of a conventional pot for boiling food, where 1 is a lid, 2 is a pot container, and 3 is a handle.

FIG. 2 shows heating conditions using a pot constructed according to the principles of the present invention.

In FIGS. 1 and 2, a steam outlet such as 7' is made at the joint I between the container 2 and the handle 3.

When food 4 is placed in a container 3 and heated by a heat source 5, the steam pressure in the container increases rapidly when the food 4 boils, and high-temperature water vapor is vigorously discharged from an outlet 7'.

This state is shown in FIG. 3, where T is the temperature of the steam 6 and t is the heating time.

The temperature near t1 is near the boiling point of the food, and the temperature of the water vapor 6 at that time is T1 [° C.].

In the above state, as shown in Fig. 4, the discharge port 7'
If a temperature-sensitive sensor is installed nearby, the temperature of the water vapor 6 can be detected.

Figure 6 shows the temperature dependence when used as a temperature sensor? An example of temperature characteristics of antibodies is shown.

T is the ambient temperature, and R/R25 is the resistance ratio to the resistance value when the ambient temperature is 25 [° C.].

FIG. 7 shows an example of a temperature detection circuit in which a temperature-dependent resistor 8 is used as one side of a bridge.

In FIG. 7, a bridge circuit is constructed by a resistor 8, a resistor 10, and an IL12.

The ratio of resistors 11 and 12 is designed to correspond to temperature T1 in FIG.

If the resistance value of the resistor 11 is R1, and the resistance value of the resistor 12 is R12, then R2/R1+R2·oc T1 becomes the temperature threshold.

21 is a voltage comparison circuit; 14 is a notification buzzer; and a switching transistor for driving a light emitting diode; 9.1
3 is a current limiting resistor, and E is a DC power supply that drives the entire circuit.

The operation of the present invention will be explained in detail with reference to FIGS. 3, 4, 5, and 6.

Before the food being heated is boiled, T<T, and the voltage between the terminals of the temperature sensor 8 is below the threshold value, so the output voltage of the voltage comparison circuit 21 becomes a ``low level'' and the transistor 14 is cut off. state.

When the food is boiled and T≧T1, the voltage between the terminals of the temperature sensor 8 exceeds the threshold value, so the voltage comparison circuit 21
The output voltage of transistor 14 becomes ゜'high level''.
is conductive, so the buzzer 15 is energized and gives a notification.

At the same time, since the light emitting diode 20 is also energized, the light emitting diode lights up.

FIG. 7 shows an example in which the circuit portion shown in FIG. 5 is integrated into the handle 3 of a pot.

In FIG. 7, the handle 3 is made hollow so that the circuit section shown in FIG. 5 can be completely installed inside it.

17 is a printed circuit board made of parts 19 and 18
is a dry battery used as a DC power source E.

The sensor 8 is arranged so that it is directly exposed to the high temperature steam 6, and an exhaust port 16 for the steam flow 6 is provided.

The handle 3 is fixed to the steam outlet 7 of the pot by means of mounting screws 22, 22'.

If you use a pot based on the above principles and precepts.

(1) Can be used regardless of the type of heating source (gas, electricity, etc.).

(2) Since it can be integrated with the handle of a conventional pot, handling is no different from that of a conventional pot.

(3) Since automatic notification is provided, there is no need to constantly pay attention to the status of the pot during heating.

(4) Automatic notification is provided when the temperature of steam exceeds a certain value, so the degree of heating is not affected by experience or skill level.

[Brief explanation of the drawing]

Fig. 1 is a side view of a conventional boiling pot, Fig. 2 is a diagram showing the structure of a pot showing an embodiment of the present invention, Fig. 3 is a characteristic diagram showing temperature changes of heated steam, and Fig. 4 is a diagram of the present invention. FIG. 5 is an electronic circuit diagram of the present invention, FIG. 6 is a characteristic diagram of a temperature sensor of the same essential part, and FIG. 7 is a diagram of the principle of the internal structure of the handle. 2... Container, 3... Handle, 4...
...Food, 5...Rice source, 7...Joining part, 8...Temperature dependent resistance.

Claims (1)

[Claims] 1 a water vapor discharge section, a sensor means for detecting the temperature of the water vapor and converting it into an electrical signal, a circuit that compares the electrical signal value with a preset reference signal value,
An automatic boiling pot, comprising a notification means driven by an output signal of the comparison circuit, and the notification means is activated when the temperature of water vapor generated from the food reaches the reference signal value.