| 摘要 |
PURPOSE:To decrease the flow rate to be flowed to a main flow passage by providing a ring of a large coeff. of thermal expansion which is so wound to a flexible pipe as to decrease its bore, and expanding the bore of the flexible pipe with an increase in the temp. of hot water thereby increasing the flow rate thereof. CONSTITUTION:Part of the hot water entering a panel 3 from a inflow pipe 4b is returned directly to a boiler 7 from a bypass 4c, and when the temp. of the hot water rises, the ring 1b wound to a flow rate control pipe 1 increases its diameter because it has a large coefft. of thermal expansion, thereby increasing the flow rate to the bypass 4c. Hence, the quantity of heat radiated from the surface of the panel 3 is maintained with less fluctuations than that radiated from the inflow pipe 4b when the temp. was low and the flow rate was large. Therefore, the control pipe 1 is provided with a ring of a large coefft. of thermal expansion wound on a flexible pipe in manner as to decrease its bore. With an increase in the temp. of the hot water, it expands the bore of the flexible pipe, and increases its flow rate, thereby making it possible to decrease the flow rate to be flowed to a main flow passage. |
