| 摘要 |
PURPOSE:To lessen the rise of pressure in the secondary side flow path of a check valve on the hot water supply side by the thermal expansion of water by a method in which the capacity of the secondary side flow path of the check valve is increased by the rise of pressure in the secondary side flow path. CONSTITUTION:In a hot water supplier in which the inflow side of the hot water supplier A is connected through a check valve 3' to a water supply source 4 and also the outflow side of the supplier A is connected to a hot water valve 1 by pipes, the capacity of the secondary flow path 8b of the check valve 3' is increased by the rise of pressure in the secondary flow path 8b. In short, when the valve 1 and a water valve 2 are closed after being used, water in the supplier A and the flow path of the water supply tube D2 of the valve 3' is heated by preheating of the supplier A, and the pressure of the water is raised by thermal expansion. The valve seat 10 of the valve 3' contracts a spring 14 with the valve body 11 as the pressure rises and moves to the primary side 8a of the valve cylinder 9 to increase the capacity of the secondary side flow path 8b. Since the pressure rise between the supplier A and the check valve 3' is reduced, damage to apparatus can be prevented. |
