Solar water heater air pressure emptying freeze-proofing system

Abstract

The invention discloses a solar water heater air pressure emptying freeze-proofing system mainly comprising the members of a water storage inner barrel, a heat preservation shell, a water inlet and outlet pipe, an overflow air inflation pipe, an air inflation pipe, a one-way valve, a switch valve, a pressure pump and the like. When emptying is needed, a water nozzle at the bottom end of the water inlet and outlet pipe is opened firstly, then the pressure pump is opened, compressed air enters the water inlet and outlet pipe to squeeze out water, and after the water drains away, the pressure pump is closed. When hot water is used again, the switch valve and the overflow air inflation pipe are made to communicate firstly, then the pressure pump is opened, the compressed air enters the water storage inner barrel, the hot water is squeezed out of the water inlet and outlet pipe, and the pressure pump is closed. Due to the fact that all parts except a pipeline are arranged in the heat preservation shell or indoors, the parts are not frozen A mechanical valve is adopted instead of an electric valve, so that the defect that the electric valve and a controlling circuit of the electric valve break down frequently is effectively eliminated. In addition, an air pressure pump and a controlling circuit of the air pressure pump are arranged indoors, therefore maintenance is convenient, and normal operation of the air pressure emptying freeze-proofing system can be fully guaranteed.

Description

technical field [0001] The invention relates to an antifreeze system for air pressure evacuation of a solar water heater, which is used in ordinary families, hotels and bathing industries, and belongs to the field of daily necessities. Background technique [0002] At present, solar water heaters are widely used in places such as ordinary families, hotels and bathing industries, but their winter antifreeze and use problems have not been well resolved. That is to say, the freezing and cracking of the water tank pipes of solar water heaters in winter has always been a problem that plagues the utilization of solar energy in our country. Most users choose not to use solar water heaters in winter. Since the pipeline emptying technology began to be promoted at the end of the last century, because it solved the problem of pipeline freezing and blocking in winter and eliminated consumers' doubts, it once aroused enthusiastic responses in the market. The climate difference is large,...

AI Technical Summary

Problems solved by technology

Among them, the valve type mostly uses electric valves to empty the water outlet pipes, but its main defects are: 1. After installation, there is a gap between the water tank and the pipes in the gap. Ice, so the valve itself is very easy to freeze and damage

2. The reliability of the circuit control system and the electric valve is poor, and the failure rate is high after a certain period of use, and it is not easy to frequently go to the roof for maintenance

The siphon type and the top water type also have their own obvious defects, and the phenomenon of freezing blockage will still occur

Images