METHOD OF DRAINING WATER IN HEAT COLLECTING PANEL WHEN FORCED CIRCULATION TYPE SOLAR HEAT ACCUMULATING APPARATUS IS NOT IN OPERATION IN CASE INSTALLATION OF HEAT ACCUMULATING TANK OF SAID APPARATUS AT LEVEL LOWER THAN LEVEL OF HEAT COLLECTING PANEL IS UNABLE

摘要

PURPOSE:To drain water in a reliable manner, by feeding water to a heat collecting panel from a cistern tank installed at a level lower than that of the heat collecting panel, and feeding hot water to an upper space of a heat accumulating tank having the level of water surface at a position higher than the lowermost part of the heat collecting panel. CONSTITUTION:A cistern tank 9 is installed at a level lower than the lowermost level 19 of a heat collecting panel 1. Water is supplied to the lower end portion of the heat collecting panel 1 by a pump 15, and hot water is supplied from the upper end portion of the heat collecting panel 1 via a pipe 17 to an upper space of a heat accumulating tank 3 having the level of water surface 8 at a higher position than the level 19. A lower portion of the heat accumulating tank 3 is communicated with the inside of the cistern tank 9 via a pipe 11 and a ball tap 12. With such an arrangement, water in the panel 1 is drained into the tank 9 via a pipe 16 and the pump 15.