COLLAPSIBLE SOLAR WATER HEATER Russian patent published in 2022 - IPC F24S20/55 F24S10/70 

FIELD: solar engineering.

SUBSTANCE: invention relates to solar engineering, in particular to solar heaters used in the heat supply of buildings and structures. The collapsible solar water heater contains prefabricated collectors with nozzles and fittings 4, necessary for the entry of the heated medium into the channels 5 of the solar receiver, and then for its discharge. To ensure the tightness of the connection of the fittings with the channels, flange rails 9 with sealing material are provided. The solar receiver 6 with the upper translucent cloth 15 contains heat-absorbing elements 21 on the lower elastic cloth 13. Artificial roughness is formed on thin metal sheets of heat-absorbing elements 21 and a light-absorbing coating is applied, as well as polymer 22 on the back side. The design of the lower elastic cloth 13 of the solar receiver 6 made of polymer of different densities with a foamed lower layer 20 and a dense upper layer 19 makes it possible, by means of thermal welding with heat-absorbing elements 21, to form closely placed channels 5 of smaller diameter, as well as to reduce heat loss due to the low thermal conductivity of the foamed layer 20. The collapsible solar water heater is transported to the installation site in separate units with a lower elastic cloth 13, rolled up in the form of a roll or a small bundle. This makes it possible to be made of various lengths in accordance with the dimensions of the roof sheathing 18 and optimally integrated into the roof of the building, reducing the cost of arrangement. The collapsible solar water heater is characterized by high efficiency, since along with the applied light-absorbing coating, artificial roughness is formed on the heat-absorbing elements 21, channels 5 have a smaller diameter, but closer placement in the solar receiver 6, and the foamed layer 20 of the lower cloth 13 performs the function of effective thermal insulation.

EFFECT: collapsible solar water heater is characterized by high efficiency.

1 cl, 3 dwg