KR960014766A - Output change compensation and control method according to hysteresis of proportional control gas valve - Google Patents

Abstract

The present invention relates to a control method of a gas valve used to adjust the amount of gas supplied from a proportional control gas boiler. More specifically, when the pressure of the gas supplied during operation in a conventional boiler increases or decreases, an appropriate amount of gas is corrected by correcting a difference in the current output value generated by a hysteresis phenomenon in which a gas pressure deviation with respect to the same current value exists. It relates to a method of proportionally controlling a gas valve to provide.

The control method of the present invention includes a first step of measuring data for determining the pressure of the amount of gas supplied according to a set temperature, and a method of inputting data such as gas pressure and applied current determined in the first step into a control microcomputer. Step 2, a third step of calculating a difference between the set temperature and the heating water temperature, calculating the required amount of heat according to the calculated value, and a fourth step of determining whether the temperature of the heating water is rising or falling. And a fifth step of reading the data corresponding to the determination of the fourth step and supplying a corresponding current value to the gas valve control unit to control the gas valve.

Description

Output change compensation and control method according to hysteresis of proportional control gas valve

As this is a public information case, the full text was not included.

1 is a graph illustrating the hysteresis characteristics of a gas valve used in a conventional gas boiler.

2 is a schematic circuit diagram for performing a control method according to the present invention.

3 is a flowchart showing a method according to the invention.

Claims (5)

A proportional control gas boiler comprising: a first step of measuring data for determining a pressure of an amount of gas supplied according to a set temperature; A second step of inputting data such as the gas pressure and the applied current determined in the first step into the control microcomputer (2); A third step of calculating a difference between the set temperature input by the user and the heating water temperature in the control microcomputer 2 and calculating a required amount of heat according to the calculated value; A fourth step of continuously receiving a temperature from the temperature measuring unit 4 to determine whether the temperature of the heating water is rising or falling; And a fifth step of reading data corresponding to the fourth step and supplying a corresponding current value to the gas valve control unit to control the gas valve. The gas valve control method according to claim 1, wherein the daata measured in the first step is divided into two stages when the temperature is rising and the temperature is falling. The gas valve control method according to claim 1, wherein the data measured in the first step is a proportional change current, a gas pressure, a gas calorific value, or the like. The gas valve control method according to claim 1, wherein a signal current method of transmitting a command from the control microcomputer (2) to the gas valve control unit (6) is a PWM method. The gas valve control method according to claim 1, wherein the fourth step determines whether the difference between the input temperature values is greater than zero and determining whether the temperature is rising or falling. ※ Note: The disclosure is based on the initial application.