| 摘要 |
PURPOSE: A check valve is provided to maintain the constant supply of hot water by facilitating the opening/closing operation for the flow of hot water and to prevent noise. CONSTITUTION: A check valve for a hot water heating apparatus comprises a housing (110) and an opening/closing unit (120). The housing has an inlet (111) with a tube shape which is protruding from one side and which has a cross section that becomes inclined from the upper part to the lower part, and an outlet which is formed on the other side; and installed with an opening/closing combining hinge shaft (113). The opening/closing unit is connected through a hinge to the upper part of the inside of the housing, and composed of an inlet cover (121) and a hinge shaft connecting extension unit (122). |
