| 摘要 |
On a transformer (1) is set a primar (2), and electric current of 220 volts flows therethrough. From the end of a coil of the primar (2) it is achieved that the transformer iron protrudes upward, so as to put a pot (4) into the bearing. By setting the pot (4) therein, magnetic field closes around the secondar (3) of Al ring and therein electric current of high density. Therefore, the ring (3) heats up, and a bottom of the pot (4) as well, that comes from a refractory glass. The pot (4) in its bottom, and at the same time in the centre, has a protruding (5), and it leans onto the main central transformer part.
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