| 摘要 |
An electric heater with thermal self-circulation of the room-air which is heated by means of electric resistors (7) placed in the core (6) of the heater. The heater is made of three or four casing elements (1) at the corners of which vertical gables (2) form frames for air slots (3) through which some of the room-air flows into the heater where a vertical separation wall (4) partly conducts air through air slots (5) between metal sheets (9A) and (9B) to the core (6) of the heater and partly to the channel (8) between casing element (1) and metal sheets (9A) and (9B) which is open at its upper and lower end to vertical air-flow on the outside around the core (6) when electric resistors (7) are activated for cooling the outer wall surfaces of the heater.
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