| 摘要 |
<p>Heat transfer apparatus comprises nested plastic buckets (12, 14) defining an annular heat transfer zone in which liquid (48) heated by a tubular electric heater (16) entering through the wall (20) of the outer bucket (12) a zone between the two bottom walls (22, 42) of the buckets, effects heating of liquids contained within the inner bucket (14), either directly therein, or in containers placed therein. The abutting interaction of the buckets (12, 14) defines a protected zone for the heater (16) in which it cannot be damaged by impact with articles to be heated.</p> |
