| 摘要 |
PURPOSE:To shorten the time interval of stoppage of a pump to thereby increase the amount of heat collection by a method wherein thermosensers are provided above and below a backward pipe connecting port of a heat accumulation tank and the releasing of the stoppage of the heat collecting pump resulting from the prevention of boiling of water is effected when the thermosensers detect that a predetermined temperature is reached. CONSTITUTION:In the case of the solar heat collecting device in which the heat accumulation tank 1 and a heat collector are connected through a forward pipe 6 interposed with the heat collecting pump 5 and a backward pipe 10 connected with an air vent 9, to thereby form a circulation passage 11 for water as a heat medium, the thermosensers 19 and 24 are provided at the upper and the lower part of the backward pipe connecting port 8 of the heat accumulation tank 1, respectively, and the outputs of the thermosensers are inputted to a control device 16 together with the output of a heat collecting senser 18 provided at the lower part of the heat accumulation tank 1. Thus, when the temperature T1 detected by the senser 19 exceeds a certai value (for example, 95 deg.C), the heat collecting pump 5 is stopped until the temperature T2 detected by the senser 24 drops down below a certain value (for example, 90 deg.C). |
