Water saving and comprehensive energy utilization system and method of solar water heater

Abstract

The invention relates to a water saving and comprehensive energy utilization system and method of a solar water heater. The water saving and comprehensive energy utilization system of the solar water heater comprises a water tank and a hot water pipe arranged on the lower side of the water tank. An electronic control valve, an impeller generator set and a sensor valve are sequentially installed on the hot water pipe. An electronic communicating valve communicating with the hot water pipe is installed on a cold water pipe. The work state of the whole system is controlled by a control system. Meanwhile, the impeller generator set is connected with a storage battery. The storage battery supplies power to the control system. The water saving and comprehensive energy utilization method of the system comprises (1) operation steps executed when a user opens a hot water valve, (2) operation steps executed when the user closes the hot water valve and (3) operation steps executed when water stored in the hot water pipe is used up. The solar water heater achieves water saving and comprehensive energy utilization through the new method, the water saving function is achieved without a water pump and other facilities, and it can be achieved that hot water can be obtained once the hot water valve is opened.

Description

technical field [0001] The invention belongs to the technical field of energy saving of solar water heaters, in particular to a system and method for water saving and comprehensive utilization of energy of solar water heaters. Background technique [0002] Solar water heater is a heating device that converts solar energy into heat energy to meet people's living needs. Considering the efficiency of its collectors to collect sunlight, water tanks and collectors are mostly installed on the roof of buildings. In the process of use, the user first releases the cold water in the pipeline. Taking the pipeline length of 15m as an example, the user needs to release the pipeline to store about 0.003m of water every time the user uses the solar water heater. 3 , taking the average daily use of 15 times as an example, the user needs to release about 16m of water a year 3 , wastes a lot of water resources, and at the same time, the water stored in the pipelines in northern my country is...

AI Technical Summary

Problems solved by technology

The user first releases the cold water in the pipeline during use. Taking the pipeline length of 15m as an example, the user needs to release about 0.003m of water stored in the pipeline every time the solar water heater is used. 3 , using 15 times a day as an example, the user needs to release about 16m of stored water a year 3 , wasting a lot of water resources, and at the same time, the water stored in the pipelines in northern my country is easy to freeze in winter, which is easy to cause the pipelines to freeze and crack, which brings great inconvenience to users.

[0003] At present, the method of installing a circulating pump is often used to solve this problem. After the water is used, the remaining water in the pipeline is pumped back to the water tank. However, this method saves water and wastes electric energy. The indoor installed circulating pump is noisy, and the outdoor installation and maintenance Inconvenience, poor equipment reliability

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