Patent ID: 8342168
Filing Date: 2013-01-01
Classification: F24S,Y02B,Y02E,Y10T

Abstract:
1. A system for heating liquid by solar radiation, comprising: a plurality of solar panels, at least one liquid reservoir for heated liquid and circulation pipes for circulating liquid between a solar panel of the plurality of solar panels and the at least one liquid reservoir, the liquid circulating by thermosiphonic circulation; wherein the circulation pipes form part of an open flow circuit to the liquid reservoir, the open flow circuit connected to flow channels in each of the plurality of solar panels and the circulation pipes convey liquid from an upper end of the solar panel to the upper end of the liquid reservoir and back from a lower end of the liquid reservoir to a lower end of the solar panel; a non-return valve for controlling a flow of the heated liquid from each one of the plurality of solar panels located in a portion of the circulation pipe between the upper end of the solar panel and the at least one liquid reservoir, said non-return valve being adapted to open and close at a predetermined pressure in the liquid flow from the solar panel, said valve comprising a valve seat with a fluid opening, a float body being oriented substantially horizontal and having a fully flat underside at a central portion thereof and an element of greater thickness at a periphery of the central portion of the float body, for opening and closing the fluid opening, and being adapted to collects bubbles under the fully flat underside of the float body lifting the float body, and a spindle for controlling movement of the float body.