Control system of gas-fired water heating device

Abstract

The invention discloses a control system of a gas-fired water heating device. The gas-fired water heating device is provided with a speed-variable fan and a proportional valve. An air flow channel is formed from the air inlet to the smoke outlet of the gas-fired water heating device. The control system comprises a first detector, a second detector and a controller at least having first control logic and second control logic. The first control logic controls the speed-variable fan and / or the proportional valve according to the detection information of the first detector, and the second control logic controls the speed-variable fan and / or the proportional valve according to the detection information of the second detector. When the first control logic is in service and the information detected by the first detector goes beyond the preset range, the first control logic will be switched to the second control logic for service. The control system of the gas-fired water heating device can lower the failure rate of the gas-fired water heating device, improve the reliability of the gas-fired water heating device and improve the user experience.

Description

technical field [0001] The invention relates to the field of gas appliances, in particular to a control system for a gas water heater. Background technique [0002] A gas water heating device usually uses gas as fuel, and transfers energy to cold water flowing through a heat exchanger through combustion heating to achieve the purpose of preparing hot water. Its specific forms include wall-hung boilers, gas water heaters, etc. A general gas water heating device mainly includes: a burner, a heat exchanger, a proportional valve, a fan, and a detection element for detecting the operation of the fan, etc. [0003] At present, when most gas-fired water heaters are in use, the operation of the fan is detected by the air pressure switch. The wind pressure switch is a switch device with a wind pressure ON / OFF value. When the wind pressure value reaches the ON value, it indicates that the fan can work normally. When the air pressure drops to the OFF value due to the blockage of the...

AI Technical Summary

Problems solved by technology

However, the air flow sensor installed at the air outlet of the fan is prone to failure in the flue gas environment where the above-mentioned air flow sensor is at a relatively high temperature for a long time

When the air flow sensor fails, the entire wall-hung boiler can only be in a shutdown state and cannot continue to work

On the whole, the above-mentioned wall-hung boilers have a high failure rate, poor reliability, and poor user experience.

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