| 摘要 |
A multi-layer heating apparatus having a heating unit (1) provided on the bottom of a cooking device (5), and an accumulator (2) attached to the heating unit (1). The heating unit (1) is filled with a liquid that needed to be heated and set above of a heat source (7). The heating apparatus is characterized in that at least one air conduit tube (3) is provided on the top of the heating unit (1) for leading the exhaust gas out. The air conduit tube (3) and multi layers hot water pipes (121) provided in the heating unit (1) served as a heating means, which can heat up the liquid efficiently.
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