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U.S. Department of Energy
Office of Scientific and Technical Information

Check valve and spring to prevent forward and reverse thermosiphoning in solar collector systems

Patent ·
OSTI ID:5950052
A freeze protection system allows the working fluid contained in the communicating tubes of the solar collector to drain from both the input and output tubes of the collector when a first predetermined temperature of the working fluid is detected and to fill the collector via both the input and output tubes when a second predetermined temperature is detected.
Assignee:
Sunspool Corporation
Patent Number(s):
US 4541412
OSTI ID:
5950052
Country of Publication:
United States
Language:
English