Central gas water heater for automatically adjusting circulating interval time

Abstract

The invention discloses a central gas water heater for automatically adjusting circulating interval time. The central gas water heater comprises a shell, a heat exchanger and a main controller, wherein heat exchanger and the main controller are installed in the shell. The heat exchanger is connected with a water feeding pipe and a water discharging pipe, the water feeding pipe and the water discharging pipe form a circulating loop through a circulating pipe, and the circulating loop is provided with a water pump. The central gas water heater is characterized in that the water feeding pipe and the water discharging pipe are provided with a water-feeding end temperature sensor and a water-discharging end temperature sensor correspondingly, the bottom of the shell is provided with an environment temperature sensor, and the main controller is connected with the water feeding temperature sensor, the water discharging temperature sensor, a water pump and the environment temperature sensor through signals. The water pump circulating start interval time is set through the main controller, and judgment on preheating start conditions is performed after the water pump is started in a spaced manner, so that the problems that a gas water heater with a preheating function is serious in temperature overshoot, poor in temperature uniformity, and the like are solved easily; and zero-cold-water is achieved in a real sense during the whole process, and the pipe water temperature uniformity is greatly improved.

Description

technical field [0001] The invention relates to the technical field of gas water heaters, in particular to a central gas water heater which can automatically adjust cycle interval time. Background technique [0002] In recent years, various gas water heaters with preheating function have appeared in the market one after another, realizing the instant heating function of gas water heaters to a certain extent. However, these existing gas water heaters with preheating function have significant shortcomings such as serious temperature overshoot, low water temperature in the pipeline before the second preheating start, and poor temperature uniformity during actual use, and the closer the water heater outlet is to the water heater. , the above disadvantages are more obvious. Generally, gas water heaters with preheating function start and stop preheating by judging the temperature of the return water end (inlet water) or the water outlet end. There is a large difference between t...

AI Technical Summary

Problems solved by technology

Generally, gas water heaters with preheating function start and stop preheating by judging the temperature of the return water end (inlet water) or the water outlet end. There is a large difference between the temperature detected by the temperature sensor in the water heater and the temperature of the pipeline. Therefore, the program generally includes the water pump timing cycle function, which improves the uniformity of the water temperature in the entire pipeline to a certain extent. However, the time is generally fixed and cannot be adapted to various seasons. Changes in each installation environment

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