Method and system for positive evacuation of solar collector

Abstract

A method and system for positive evacuation of water from a solar collector using a bypass line which diverts a portion of water from the feed line of the solar collector to an inlet of a water pump. When the solar water heating circuit is turned off, suction created by the filtration pump rapidly evacuates all or substantially all water present in the solar collector. The system should include a water level switch on the feed line to the solar collector, a drain valve that allows pool water to evacuate from the solar collector and associated piping when water is present, a control mechanism that relays information from the water level switch to the drain valve, a small drain line that connects the solar pool heater feed and return lines to a water pump inlet, and a check valve to prevent by-pass.

Description

[0001]This invention relates to a method and system for positive evacuation of water from a solar collector. More particularly, the invention relates to a method to ensure positive water removal from the solar collector using a bypass line which diverts a portion of water from the feed line of the solar collector to an inlet of a water pump.BACKGROUND OF THE INVENTION[0002]Solar pool heating collectors are gaining wide acceptance in both residential and commercial applications due to their ability to heat pool water to a comfortable temperature and their low installation and operational costs. These solar heating collectors typically comprise an intake and exhaust manifold connected to one or more solar collector panels which transfer solar energy to water contained in conduits in the panels. U.S. Pat. Nos. 6,787,116 and 7,112,297, the disclosures of which are each incorporated by reference herein in their entirety, disclose an improved solar collector.[0003]Solar pool heating syste...

AI Technical Summary

Benefits of technology

The present invention relates to a method and system for evacuating water from a solar collector in a swimming pool. The technical effects are improved efficiency in removing water from the solar collector and reduced energy waste during operation, as well as improved safety and convenience for the user.

Problems solved by technology

Moreover, freezing temperatures can damage the solar collector and its associated plumbing.

However, terminating the solar heating operation can trap and immobilize pool water in the solar collectors and in associated feed and return piping.

Unless this stationary pool water is removed, the solar heating collectors and associated piping can be damaged by freezing temperatures.

), which can cause scalding when the swimming pool heater cycles on again, and the water is permitted to return directly into the swimming pool.

This solution is unsatisfactory because new make-up water would continually be required, which is expensive, wasteful and would require additional heating.

However, the gravity drain line would present a safety hazard.

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