Control method of supercharging function of gas water heater

Abstract

The invention discloses a control method of a supercharging function of a gas water heater. The control method comprises the steps that when a supercharging water pump and a gas control valve of the gas water heater are in an open state, water inlet flow and water inlet temperature of a water inlet pipeline are collected in real time; according to the comparison relation between the current inletwater flow and the preset pump-off water flow and the difference between the current inlet water temperature and the set temperature and the preset pump-off temperature difference, the on-off state ofwater using equipment is determined, and a booster water pump is controlled to keep on or off according to the on-off state of the water using equipment. By controlling the booster function of the gas water heater, the problem that the water pressure is too low to achieve normal start can be solved. By monitoring the water inlet flow and the water inlet temperature of the water inlet pipeline andaccording to the comparison relation between the previous water inlet flow and the preset pump closing water flow and the difference between the current water inlet temperature and the preset temperature difference between the set temperature and the preset pump closing temperature difference, the turn-off time of the booster water pump can be quickly and accurately judged.

Description

technical field [0001] The invention belongs to the technical field of control of zero-cold water gas water heaters, and in particular relates to a method for controlling the pressurization function of gas water heaters. Background technique [0002] At present, the zero-cold water gas water heater has become the trend of the water heater industry because it can realize instant hot water. Controlled, usually when the user turns off the hot water tap, the stored water in the hot water pipe and the return pipe will circulate under the action of the water pump to continue heating the stored water. The water pump will be turned off during the preheating process. The preheating period is long (generally more than 4 minutes), which wastes gas and electricity. The inability to quickly turn off the water pump after turning off the water may cause misunderstandings for users. At the same time, continue to heat the stored water until the outlet water temperature reaches high temperatu...

AI Technical Summary

Problems solved by technology

[0002] At present, the zero-cold water gas water heater has become the trend of the water heater industry because it can realize instant hot water. Controlled, usually when the user turns off the hot water tap, the stored water in the hot water pipe and the return pipe will circulate under the action of the water pump to continue heating the stored water. The water pump will be turned off during the preheating process. The preheating period is long (generally more than 4 minutes), which wastes gas and electricity. The inability to quickly turn off the water pump after turning off the water may cause misunderstandings for users. At the same time, continue to heat the stored water until the outlet water temperature reaches high temperature protection. Temperature (about 75 ℃) to turn off the pump to stop heating. When the user turns on the hot water tap again, it is very easy to cause scald accidents. In addition, in order to avoid scald accidents, zero cold water gas water heaters on the market generally limit the preheating target temperature to less than 48 ℃~ 50°C, therefore, the existing zero cold water preheating function has certain limitations

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