| Compact Pressured Solar Water Heaters is to make use of the high sun had by vacuum tube to absorb a ratio and to launch ratio coating low , change the solar radiation admitting becoming a thermal energy, that the heat conduction is in charge of prompt biography by inserting the phase transition copper within the vacuum tube makes entire water box inner water temperature rise gradually till water box inner. The vacuum tube has the ability tracking naturally to the sun , the sun is subsidiary only when having stream into, the vacuum tube may work right away; Since the phase transition heat pipe has one-way heat passage characteristic property , even arctic-alpine area, all seasons is equal highly efficient operation.
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