| 摘要 |
PURPOSE:To eliminate the need for regulation of a set temperature of a valve according to a change in an outside air temperature, by a method wherein primary and secondary tanks, in which the sun heats heat medium at the inside, are connected through a valve which is operated by means of a temperature difference between a heat medium temperature and an open air temperature. CONSTITUTION:A secondary tank 6 is mounted below a primary tank 1 connected to a solar heat collecting part 2, and the two tanks 1 and 6 are connected through a difference temperature valve 7. A high-temperature side temperature sensor 8, which detects a heat medium temperature in the primary tank 1, and a low-temperature side temperature sensor 9, detecting an open air temperature, are mounted, detecting signals from the sensors 8 and 9 are inputted to a controller 10, and the difference temperature valve 7 opens when a difference between the heat medium temperature and the open air temperature reaches a set value. A whole device is housed in a casing 4, and a solar light transmitting substance 3 is placed. |
