Multi-gas source self-adaptive control method for gas apparatus and system thereof

Abstract

The invention provides a multi-gas source self-adaptive control method for a gas apparatus and a system thereof. The technical scheme is that the multi-gas source self-adaptive control method for thegas apparatus comprises the steps that the proportional coefficient values of the output thermal load required in time and the proportional coefficient values of the reference thermal load required atthe set temperature of a reference gas source in time are calculated through program operation by collecting the data of the inlet water temperature, the outlet water temperature, the water flow capacity, the fan current, the fan speed and the gas proportional valve current; the difference changing range of the proportional coefficient value of the output thermal load required in time compared with the proportional coefficient value of the reference thermal load is judged; the type of the gas source applied currently is automatically identified, the current value of a gas proportional valve and a matching fan current value are adjusted to achieve the optimum proportion between the opening degree of the gas proportional valve and the fan speed so that the gas apparatus can operate steadily, safely and reliably with less energy; the gas adaptability of the gas apparatus to gas is improved; comfortable and convenient domestic hot water is provided for users; the product utilizing fault rate is reduced; and the domestic and foreign flue gas emission standards are met.

Description

technical field [0001] The invention belongs to the technical field of gas appliance circuit control, and in particular relates to a multi-gas source self-adaptive control method and system for a gas appliance. Background technique [0002] In the prior art, when the gas water heater is burning normally, the current value of the gas proportional valve and the corresponding fan current value obtained by using the reference gas source preset in the program are used to optimize the opening of the gas proportional valve and the fan speed. Matching. When the composition of the same gas source changes in an appropriate amount, normal combustion can be guaranteed, but when the composition of the gas source changes greatly or substantially, various abnormal phenomena will appear in each combustion load section of the water heater, which cannot meet the technical requirements for normal combustion. Requirements, when serious, will affect the normal operation of the gas water heater,...

AI Technical Summary

Problems solved by technology

The air-fuel ratio adjustment control program of general gas water heaters is difficult to adapt to and meet the requirements of European CE standards, and more requirements for combustion performance indicators restrict the export of most domestic manufacturers.

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