| 摘要 |
PURPOSE:To prevent an operation from stopping by providing a check valve for closing a valve of a circulating pipe between an open tank and a water boiler at the time of heating the boiler and a check valve for stopping flow from the pipe to the tank in a connection pipe for connecting the pipe to the tank between the boiler and a heat radiator. CONSTITUTION:When supplied water is contained from an open tank 1 in circulating pipes 4, 4'..., 4'', a water boiler 2, a heat radiator 3 and a connecting pipe 6 and heated in the boiler 2 by a burner 7, a check valve 5 is closed by the pressure of vapor, hot water is fed from the pipe 4' to the radiator 3 to become cold water, and returned to the tank 1. When all the water in the boiler 2 is extruded, its pressure is lowered, the water in the tank 1 is fed to the boiler 2, and hot water is again fed to the radiator 3. When the internal pressure of the boiler 2 is reduced, a check valve 5' is opened, water of the tank 1 is supplied from a connecting pipe 6 into the pipe 4', and the pipe is completely filled with the water. The boiler 2 which becomes low temperature with the fed water becomes an extreme negative pressure, then the next hot water can be extruded without air lock to stably circulate hot water. |
