| 摘要 |
A solar collector for heating water consisting of an insulated housing having a darkened interior and a light transmitting top which preferably filters out solar rays in the UV range. The housing has ventilation apertures in opposing walls. A soft, flexible, non-opaque plastic bladder is contained within the housing. At least the upper portion of the bladder is translucent so as to partially scatter solar rays. The bladder contains water inlet and outlet means and preferably has a valve in the upper portion which allows the venting of trapped air within the bladder and prevents outside air from entering the bladder and water from overflowing the bladder. When the bladder is filled, it blocks the ventilation aperture. Solar radiation is transmitted through the housing top and scattered or diffused by the translucent bladder. Some solar rays are absorbed by the water in the bladder and converted to heat. Rays not absorbed by the water are absorbed by the darkened interior of the housing and also converted to heat. When the bladder is empty, the ventilation apertures are uncovered and outside air circulates through the housing, preventing buildup of excessive heat in the housing.
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