| 摘要 |
PURPOSE:To eliminate a complicated measuring work by composing part of an expansion tank of a member capable of visually recognizing heat medium liquid level and providing capacity indicating means on the member. CONSTITUTION:An open type expansion tank 13 which is provided in a solar heat storage tank A is, for example, formed of transparent resin, a heat medium supply port 13a with a detachable cover 13b and a communication port 13c are opened at one side, and the port 13c is connected to the suction port of a circulating pump 4. Capacity display label 5 is bonded as capacity indicating means on one side wall of the tank 13. In order to indicate heat medium capacity on the label 15 in the tank 13, scale of every liter is, for example, described. In this manner, the heat medium can be filled while observing the label 15 at the time of filling the medium. |
