With the continuous improvement of people's living environment requirements, water heaters have been widely used in 

homes, apartments, hotels and other occasions. The water output of most ordinary water heaters depends on manual 

manual adjustments, and it is often the case that winter water is not hot and summer water is overheated. When switching 

between winter and summer seasons, it is necessary to manually switch the water volume switch. Even if some water 

heaters can control the amount of water discharged, this also depends on high-cost and complex electronic control 

technology to achieve, thus greatly increasing the design and production costs of water heaters. This product provides a flow

 control device that can automatically adjust the water flow rate of the water heater as the weather cools and warms, and 

the production cost is low.