JPS6360654B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a heating device such as an electric range having a boiling detection means and an energization amount control means.

Conventional configurations and their problems Conventional heating devices such as electric ranges have a configuration in which the heat is kept at a temperature lower than the boiling temperature after boiling, and the drawback is that the heat retention temperature is too low.

OBJECTS OF THE INVENTION The object of the present invention is to energize the heating means at a preset amount of electricity after detection of boiling to continue to maintain a warm state or a cooking state.

Composition of the Invention The heating device of the present invention is provided with a heating means such as a heater for heating a container such as a pot, and the amount of electricity applied to the heating means is determined by a signal from an energization amount setting device set by the user using an energization amount determining means. Then, the energization amount control means is controlled by the signal from the energization amount determining means, and the set energization amount is applied to the heating means. When the energizing means operates, a constant amount of current is applied to the heating means regardless of the state of the energizing amount setting device, and the temperature of the water in the container is indirectly detected by a temperature sensor placed in contact with a container such as a pot. Then, using this temperature as an input signal, the boiling detection means calculates the temperature rise rate of the water, etc., and continues to supply electricity until the boiling state of the water is detected.When the boiling detection means detects the boiling state of the water in the container, the boiling state is restarted. The amount of current applied to the heating means is returned to the amount of current set by the amount of current setting means.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a circuit diagram of this embodiment, which is made up of a microcomputer 1 and peripheral circuits. The microcomputer 1 shown here is
Consists of CPU, ROM, RAM, input/output ports, etc. This is a so-called one-chip microcomputer.

The temperature detector 2 is connected to an input port of the microcomputer 1 via an A/D converter 3. As a result, the temperature signal from the temperature detector 2 is converted into a binary code and read into the microcomputer 1.

Similarly, energization amount setting data is read into the variable resistor 4 as energization amount setting means via the A/D converter 5.

The start switch 6 is input to the microcomputer 1 to determine whether it has been pressed.

A series circuit of a heating means 8 and a bidirectional thyristor 9 is connected to an AC power source 7, and a gate current flows through the bidirectional thyristor 9 from a DC power source 10 through a light receiving portion of a photocoupler 11.

The energization amount control signal from the output port of the microcomputer 1 is driven through the transistor 12, and current flows through the light emitting part of the photocoupler 11, thereby operating the light receiving part of the photocoupler 11, and gate current flows from the DC power supply 10 to both sides. The tropic thyristor 9 becomes conductive.

This energization amount control signal is such that when the microcomputer 1 determines that the water in the container is boiling based on the temperature data from the temperature detector 2, it outputs an "off" signal and stops driving the bidirectional thyristor 9. The heating means 8 is configured to stop energizing the heating means 8, and the microcomputer 1 outputs "on" and "off" signals at predetermined intervals based on the energization amount setting data from the variable resistor 4, thereby controlling the bidirectional thyristor. 9
The heating means 8 is driven to adjust the amount of current supplied to the heating means 8.

Next, the operation of the heating device configured as described above will be explained.

Figure 2 shows the contents of the microcomputer 1.
It shows a flowchart stored in ROM. The program operates according to the steps shown in this flowchart. First, it is determined (step) whether or not the start switch 6 has been pressed, and if it is determined that it has not been pressed, the set position of the variable resistor 4 is detected in step, and the heating means is set according to the set position detected in step. A loop is formed in which the amount of current applied to 8 is output and the process returns to step 8. If it is determined that the start switch 6 has been pressed in step 5, a certain amount of electricity is continuously supplied to the heating means 8 in step 5, and the container 1 is heated in step 5.
It continues to supply electricity until it determines that the water in 3 is boiling, and when it determines that it is boiling, it proceeds to step. Here, the determination that it is boiling is determined that the temperature change of the temperature detector 2 is becoming gradual. For example, the program is programmed to determine that the water is boiling when it takes more than 1 minute for the temperature to change by 1°C.

Effects of the Invention As explained above, according to the present invention, the energization amount is set in advance by the energization amount setting means before the boiling detection means detects that the water in the container such as a pot is boiling. If this is done, the heating means will continue to be controlled with the set amount of electricity after boiling is detected.
In this way, the water can continue to be kept warm after it has boiled. Also, when cooking stewed dishes, etc., it is possible to rapidly heat the food to the boiling point, and after boiling, continue to simmer at the set amount of electricity. Therefore, after boiling is detected, the heating means is energized with a preset amount of energization to keep it warm or cooking.
It's much easier to use.

[Brief explanation of drawings]

FIG. 1 is an electric circuit diagram of a heating device showing an embodiment of the present invention, and FIG. 2 is a flowchart showing an example of a program of the heating device. 1...Microcomputer, 2...Temperature detector, 4...Variable resistor, 6...Start switch, 11...Photocoupler, 9...Bidirectional thyristor.

Claims (1)

[Claims] 1. A heating means such as a heater, a temperature detector that comes into contact with a container such as a pot, and a boiling detection means that uses the temperature detected by the temperature detector as an input signal to detect the boiling state of water in the container; energization amount setting means for setting the amount of energization to the heating means; energization amount determining means for determining the energization amount based on a signal from the energization amount setting means; and heating by a control signal from the energization amount determining means. energization amount control means for controlling the amount of energization to the means; a switch for instructing the start of operation of the boiling detection means; When the water in the container boils and the boiling detection means outputs a boiling detection signal, the amount of energization to the heating means is returned to the amount of energization set by the energization amount setting means. Heating equipment equipped with energizing means.