| 摘要 |
<p>The convector heater with air inlet and outlet grids (7) top and bottom has a heating unit (8) near the bottom, extending from end- to-end. In the front panel (2) is an auxiliary grid (16) with openings (15) for discharge of hot air. Behind this is an auxiliary heater (14) fitted with a thermostat (17). Hot air is discharged from the auxiliary system by a fan such as an anvil fan (13), or a tangential or centrifugal fan. The lower heater (8) is connected with the auxiliary system by an opening (18) through the casing of the upper heater, controlled by the thermostat.</p> |
