| 摘要 |
FIELD: liquid heating devices. SUBSTANCE: liquid heating apparatus includes water tank where external double- walled drum is located; this drum is provided with gas distributing chamber formed in double wall. External drum contains internal drum provided with combustion chamber; formed between drums is separate water chamber with upper and lower connecting pipes located respectively in upper and lower portions of the chamber; upper connecting pipe runs through external drum and is communicated with cavity of water tank; lower connecting pipe is used to connect lower portion of separated water chamber with bottom portion of water tank; exhaust pipe located in upper portion of separated water chamber is used to connect combustion chamber with gas distributing chamber; exhaust pipe located in lower portion of external drum is open outside from the water tank. Bearing cylinder for burner runs through external drum and separated water chamber; bearing cylinder extends from side wall of inner drum outside water tank. EFFECT: enhanced efficiency. 9 cl, 8 dwgs
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