Gas water heater and anti-wind-pressure control method thereof

Abstract

The invention relates to a gas water heater. The gas water heater comprises a body, wherein the body is internally provided with a controller, a fan communicating with a combustion chamber, a gas proportional valve arranged on a gas channel, and a fire sensing needle arranged close to a fire row, a wind pressure sensor is arranged at an air exhaust port of the body, and the controller is electrically connected with the fan, the gas proportional valve, the fire sensing needle and the wind pressure sensor. The invention further relates to an anti-wind-pressure control method of the gas water heater, and through comparison of real-time working current and standard working current of the fire sensing needle, the rotating speed of the fan is adjusted. According to the gas water heater and the method, the judgment of the combustion influence of external wind pressure on the gas water heater is more direct and more accurate, the combustion stability can be ensured, and meanwhile, the anti-wind-pressure control method of the gas water heater realizes the constant-temperature control of effluent water, realizes the constant-temperature performance of the effluent water, and improves the user experience.

Description

technical field [0001] The invention relates to the technical field of gas water heaters, in particular to a gas water heater, and also to a method for controlling wind pressure resistance of a gas water heater. Background technique [0002] Gas water heaters are widely used as a common household appliance. With the popularity of high-rise residential buildings, the high-rise wind pressure resistance of gas water heaters has become a challenge, especially in coastal areas, where the sea breeze is relatively strong, and there is a short period of typhoon weather in summer. Existing water heaters are dealing with high wind pressure resistance such as summer typhoon weather. In some cases, it is prone to flameout, failure to reach the set temperature, poor smoke and other phenomena, which will affect the use of customers and poor user experience. The existing technology either does not add wind pressure resistance function, or calculates the demand load to resist wind pressure...

AI Technical Summary

Problems solved by technology

With the popularity of high-rise residential buildings, the high-rise wind pressure resistance of gas water heaters has become a challenge, especially in coastal areas, where the sea breeze is relatively strong, and there is a short period of typhoon weather in summer. Existing water heaters are dealing with high wind pressure resistance such as summer typhoon weather. In some cases, it is prone to flameout, combustion cannot reach the set temperature, poor smoke and other phenomena, which will affect the use of customers and poor user experience

The existing technology either does not add wind pressure resistance function, or calculates the demand load to resist wind pressure. The load is estimated data, there are deviations, and there will be a phenomenon of poor constant temperature, which will affect customer use.

Application publication number is CN107525265D (application number is 201610472797.4) Chinese invention patent application "A Blast Type Gas Water Heater Using Flame Detection and Wind Speed ​​Compensation", the water heater disclosed in it judges whether the exhaust port is blocked by measuring the temperature of the combustion chamber Or whether the external wind pressure is too high, when the measured temperature of the combustion chamber reaches or exceeds a certain preset value, the exhaust air volume is increased by increasing the fan speed, but this solution abandons the constant temperature performance when realizing the anti-wind pressure function, lead to poor user experience

In addition, when the fan speed is increased, the amount of air entering the combustion chamber increases, and the air pressure in the combustion chamber increases. If the opening of the proportional valve remains unchanged, the air intake will decrease accordingly due to the influence of the air pressure in the combustion chamber. Flame out, fire transmission failure, combustion does not reach the set temperature, bad smoke, etc.

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