FIELD: domestic appliances. SUBSTANCE: electric convertor has tubular heating element which case is manufactured from two semi-cylinders with side bends forming ribs and outer ribbing forming set of wavy plates with rectangular corrugations arranged sidewise. Length of upper rib is greater than that of lower rib. Outer ribbing is characterized by certain relationship of geometrical parameters. EFFECT: enhanced efficiency of heating of rooms. 4 dwg
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Authors
Dates
1995-05-10—Published
1993-03-26—Filed