Method and device for inputing waste hot water to prevent freezing and using hot for solar water heater in winter

Abstract

The method of feeding afterheat water to prevent freezing and using hot water from solar water heater includes the following steps: setting one device for feeding afterheat water to prevent freezing and using hot water in winter; placing the device at indoor afterheat source or connecting the afterheat inlet and outlet to afterheat source and the afterheat water inlet and outlet to tap water pipe and solar water heater separately; heating water inside the device with afterheat source and feeding heating water to solar water heater when water is used; and exhausting the solar water heater after using water. The solar water heater has exhaust valve outlet connected to the anti-freezing and hot water feeding device, water feeding pipe and water tank inlet; and hot water outlet connected to water tank outlet. Utilizing afterheat to heat water in the water heater can ensure hot water supply and no freezing of water tank and vacuum pipe.

Description

Technical field [0001] The new invention belongs to the category of solar water heaters, and particularly relates to an antifreeze device for solar water heaters. Background technique [0002] Solar water heater is a kind of water heater that uses solar energy to generate heat to heat water. Its main forms are flat plate type, dry type and vacuum collector tube type. In order to realize the anti-freezing and use of solar water heaters in winter, people adopt a variety of electromagnetic emptying valves at the inlet and outlet pipes of the solar water heaters, or an emptying system composed of multiple valves, and control the upper and lower water pipes after water is used. The emptying prevents the stagnant water from freezing in the pipeline. However, when an electromagnetic drain valve is used, it is often driven out of control due to the use of electric energy. The emptying system composed of multiple valves has complicated structure and is troublesome to operate. At the same ...

AI Technical Summary

Problems solved by technology

However, the vacuum tube type solar water heater with large diameter and super long length is used to increase the water temperature of solar hot water and enhance the anti-freezing ability in winter. The water capacity in the vacuum tube increases correspondingly, and the resulting water temperature can usually only be increased by about a few degrees. If encounter continuous rainy and snowy weather for many days, when there is no sunlight, the temperature will still drop to below tens of degrees below zero. At this time, the heat collecting tubes of large-scale solar water heaters will be shattered and cracked, and the water tank will be damaged by freezing.

At the same time, as soon as winter comes, when the temperature drops below 0°C, the solar water heaters installed in most parts of our country cannot produce hot water normally due to the impact of freezing, and become products that are used for half a year and half a year, thus affecting people's daily needs

Solar water heaters are supposed to use solar energy to generate hot water for the benefit of the people, but they are easily damaged by cold weather. They are used for half a year, idle for half a year, and all kinds of troubles and economic burdens encountered in maintenance and operation are really annoying.

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