Full-automatic pipeline emptying and antifreezing system and control method

Abstract

The invention relates to a pipeline emptying and antifreezing system and a control method in the field of solar water heaters, and in particular to a full-automatic pipeline emptying and antifreezing system and a control method. The technical scheme is that the system comprises a water tank of a water heater, a water pipeline, a control instrument, an electric blowoff valve, an electric drain valve, an electric water filling valve, a sensor, a water faucet, a shower nozzle and the like, wherein the system is controlled through a singlechip program and is alternately switched on and off to be delayed for more than 3 seconds, and when water is used, the indoor electric drain valve is closed after being delayed for more than 10 seconds at least. The control method is that when the front end of the electric drain valve is bent to form a 'U' shape, air in the pipeline is smoothly discharged, so that the influence which is caused by the 'U'-shaped bending to the system is basically solved, the technical bottleneck which influences pipeline emptying and antifreezing all the time is broken through, automatic control is realized, and the purposes of convenience in use and high reliability are realized.

Description

Technical field

[0001] The invention relates to a pipeline emptying antifreeze device and control method in the field of solar water heaters, in particular to a fully automatic pipeline emptying antifreeze system and control method. Background technique

[0002] At present, the utilization rate of household solar water heaters on the market has become higher and higher. In some provinces and cities, the government has also forced the promotion in the form of documents, especially in coastal provinces and cities, and the penetration rate in rural cities and towns has reached a very high level. Nevertheless, this kind of clean and environmentally friendly energy-saving solar water heaters are mostly in the dilemma of being idle and unusable in winter. The winter antifreeze technology of domestic solar water heaters has become a technical bottleneck of the industry, which cannot be broken through for many years. The use of pipe heating with heating to prevent freezing is currently t...

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