| 摘要 |
<p>The heater comprises two vertical collector tubes (1) for feed and return, to which there are connected a plurality of flat heating tubes (3) arranged horizontally one above another. Each flat heating tube (3) is connected to the same collecting tube (1) by a single connection. The connecting point of the tubes (1, 3) is formed by in each case one circular bore (5), which bores have the same axis and the same shape. Each horizontal flat heating tube (3) has a bore (5) situated near the upper longitudinal edge of the flat heating tube (3) and one situated near the lower longitudinal edge of the flat heating tube (3). The heater of this type can be produced with a lower outlay on time and cost than is the case for the known heaters. <IMAGE></p> |
