Multiple segment gas water heater and multiple segment gas water heater with water jacket
Patent
·
OSTI ID:7121516
This patent describes a gas water heater having (A) an annular water jacket surrounding a combustion chamber below and a vertically stacked, spaced multiple heat exchanger segments above, the multiple heat exchanger segments being spaced from the water jacket, (B) a conical top wall, in extension of the water jacket, having a central opening forming an exhaust gas passage, (C) a chimney being connected to the central opening of the top wall, (D) each heat exchanger segment having a perforated water inlet pipe and a perforated water outlet pipe within the heat exchanger segments, the inlet and outlet pipes being vertically connected to other heat exchanger segments through water pipe, (E) each heat exchanger segment having a central opening to receive a perforated exhaust flue pipe communicating to the combustion chamber and extending into the chimney. The perforations of the flue pipe are exposed between the heat exchanger segments in communication with space between heat exchanger segments and water jacket. The exhaust flue pipe has a constricted outlet within the chimney to form a venturi whereby additional exhaust gases can be induced into the chimney from the spaces between the heat exchanger segment and water jacket, (F) an incoming cold water supply tube being connected at the top portion of the water jacket for preheating, a hot water pressure relief pipe being connected to the uppermost heat exchanger segment, (G) a heated water outlet tube being connected to the perforated outlet water pipe of the uppermost exchanger segment, and (H) a connecting tube making connection between the perforated inlet pipe of the uppermost heat exchanger segment and top portion of the water jacket whereby incoming water being preheated and circulated from water jacket to the connecting tube and into the heat exchanger segments.
- Assignee:
- NOV; EDB-87-039893; NOV-87-041361
- Patent Number(s):
- US 4632066
- OSTI ID:
- 7121516
- Country of Publication:
- United States
- Language:
- English
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