JPS5955225A - Heating machinery - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to boiling detection means and energization 111', flill
*It relates to heating equipment such as electric ovens that have a t1-double reading of 41.

Conventional structure and its problems Traditionally, heating equipment such as electric ranges are 71
It has a structure that maintains heat at high and low temperatures. l
A disadvantage is that the temperature is too low./0Object of the Invention The present invention provides a method for controlling the flow of water to the heating means after boiling is detected.
The purpose of this is to keep the heating means in a warm state or a cooking state at a preset amount of electricity.

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 current applied to the heating means is determined by a signal from the energization 111'' setting device set by the user using the energization amount determining means. The energization amount control means is controlled by the signal from the energization amount determining means J2, and the set energization amount is applied to the heating means. , the boiling energizing means operates, and a constant amount of current is applied to the heating means regardless of the state of the energization 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 the 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, and when the boiling state of the water in the container is detected by the boiling detection means, The amount of energization to the heating means is returned to the amount of energization set by the energization amount 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 includes a CPU, ROM, and RAM.
It consists of input/output ports, etc. A zero temperature detector 2, which is a so-called one-chip microcomputer, 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, the variable resistor 4 as the energization amount setting means is also
The energization amount setting data is read in via the D converter 6.

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 zyristor 9 is connected to an AC power source 7, and a gate current flows through the bidirectional zyristor 9 from a DC power source 10 through a light receiving section of a photocoupler 11.

The photocoupler 11 is activated by driving the energization amount control signal from the output port of the microcomputer 1 through the transistor 12 and causing a current to flow through the light emitting part of the photocoupler 11.
The light-receiving section of is operated, a gate current flows from the DC power supply 1o, and the bidirectional Zyrister 9 becomes conductive.

This energization amount control signal outputs an "off" signal and stops driving the bidirectional thyristor 9 when the microcomputer 1 determines that the water in the container is boiling based on the temperature data from the temperature detector 2. The microcomputer 1 outputs "on" and "off" signals at predetermined intervals based on the energization amount setting data from the variable resistor 4, and 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.

FIG. 2 shows a flowchart stored in the ROM in the microcomputer 1. The program operates according to the steps shown in this flowchart. First, it is determined whether the start switch 6 has been pressed (step ■), 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 set position detected in step ■ is set in step ■. The corresponding amount of current to be applied to the heating means 8 is output, and the loop returns to step (2).

If it is determined in step (2) that the start switch 6 has been pressed, a certain amount of electricity is continuously applied to the heating element 198 in step (2), and the electricity is continued until it is determined that the water in the container 13 is boiling in step (2). If it is determined that the water is boiling, proceed to step ■. Here, the determination that the water is boiling is based on the fact that the temperature change of the temperature sensor 2 is gradual.

For example, according to the present invention, boiling detection means can be used to determine that a pot is boiling when it takes more than 1 minute for the temperature to change by 1°C. If the amount of energization is set in advance with the energization amount setting means before it is detected that the water in the container is boiling, the heating means will be controlled with the set energization amount after boiling is detected. I will continue.

In this way, water can be kept warm after boiling. Also, when boiling, it is possible to rapidly heat it to the boiling point and continue boiling with the set amount of electricity. Therefore, after boiling is detected, the heating means is energized with a preset amount of energization to maintain the heat-retaining state or the cooking state, making it very convenient to use.

[Brief explanation of the drawing]

FIG. 1 is an electric circuit diagram of a heating device showing an embodiment of the present invention;
FIG. 2 is a flowchart showing an example of a program for the heating device. 1...Microcomputer, 2...
Temperature detector, 4... Variable resistor, 6...
・Start switch, 11...Photocoupler,
9...Bidirectional thyristor. Name of agent: Patent attorney Toshio Nakao and 1 other person
〇-Taste Figure 2

Claims (1)

[Claims] a heating means such as a heater; a temperature detector that comes into contact with a container such as a pot; 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 energization 111 to the means; energization amount determining means for determining the energization amount based on a signal from the energization amount setting means; and energization to the heating means by a control signal from the energization amount determining means. an energization amount control means for controlling the amount of energization; a switch for instructing the start of the operation of the boiling detection means; and a signal for the energization 1?1 setting means to set the energization amount of the energization amount control means based on the signal of the switch. When the water in the container boils and the boiling detection means outputs a boiling detection signal, the heating means is energized and the amount of electricity is returned to the amount set by the energization amount setting means. Heating equipment equipped with energizing means.