| 摘要 |
<p>The plate is of plastic or artificial stone with good heat conductivity and for heating water, particularly that in a swimming pool. Under the surface are provided chambers through which water flows and which are connected to the heater circuit. The chambers can be in the form of pipe coils (2, 3, 4) or of box-section, and the plates can be connected in series. There can be an insulating layer on the underside. The design allows solar energy to be used.</p> |
