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US 8,567,352 B2Granted
Low maintenance fluid heater and method of firing same
OwnerPatrick A. Kauppinventor
Life of this patent
Estimating the term…
Abstract
A fluid heater constructed of rectangular tubing through which fluid to be heated is circulated in a circuitous path. The floor and walls of a combustion chamber of the heater are constructed of the rectangular tubing. A tubular coil stack is positioned over the combustion chamber and surrounded by coil stack chamber walls constructed of the rectangular tubing. Consequently, all surfaces of the fluid heater exposed directly to flame are constantly cooled by the fluid to be heated. A combustion unit of the fluid heater is removable to facilitate maintenance.
Claims20
A fluid heater, comprising:
- metal tubing edge-welded together to construct a combustion chamber floor, a combustion chamber wall mounted to the combustion chamber floor that forms three sides of a combustion chamber with a fourth side formed by a combustion unit, and a coil stack chamber wall that forms four sides of the coil stack chamber above the combustion chamber;
- and
- a coil stack supported within the coil stack chamber through which flue gas is exhausted from the combustion chamber;
- whereby, the edge-welded metal tubing of the combustion chamber floor, the combustion chamber wall and the coil stack chamber and the coil stack provide an uninterrupted flow path between an inlet and an outlet for the fluid to be heated.
1 more element
A fluid heater, comprising:
- a combustion chamber floor constructed of rectangular steel tubing edge-welded together to form an uninterrupted, circuitous flow path through which fluid to be heated is pumped;
- combustion chamber walls mounted to the combustion chamber floor and forming three sides of a combustion chamber constructed of rectangular steel tubing edge-welded together to form an uninterrupted, circuitous flow path in fluid communication with the uninterrupted, circuitous flow path through the combustion chamber floor;
- a removable combustion unit that forms a fourth side of the combustion chamber;
- a coil stack support beam mounted to a top of the combustion chamber walls and in fluid communication with the uninterrupted, circuitous flow path through the combustion chamber walls;
- a coil stack chamber mounted to a top of the coil stack support beam and constructed of rectangular steel tubing edge-welded together to form an uninterrupted circuitous flow path in fluid communication with the flow path through the coil stack support beam;
- a coil stack supported by the coil stack support beam within the coil stack chamber, the coil stack being constructed of steel pipes interconnected by U-shaped elbows, one end of the coil stack being in fluid communication with the uninterrupted, circuitous flow path through the coil stack chamber;
- an inlet for the fluid to be heated connected to the combustion chamber floor;
- and
- an outlet for the fluid to be heated connected to the other end of the coil stack.
6 more elements
A fluid heater, comprising:
- a combustion chamber floor constructed of rectangular steel tubing edge-welded together to form an uninterrupted flow path through which fluid to be heated is circulated;
- three combustion chamber walls welded to the combustion chamber floor to form an uninterrupted flow path in fluid communication with the uninterrupted flow path through the combustion chamber floor;
- a removable combustion unit that forms a fourth side of a combustion chamber defined by the combustion chamber floor, the combustion chamber walls and the removable combustion unit;
- a coil stack support beam mounted to a top of the combustion chamber walls in fluid communication with a top of one of the combustion chamber walls;
- a coil stack chamber mounted to a top of the coil stack support beam in fluid communication with a flow path through the coil stack support beam;
- a coil stack supported by the coil stack support beam within the coil stack chamber having one end in fluid communication with a top of the coil stack chamber;
- an inlet for the fluid to be heated connected to one side of the combustion chamber floor;
- and
- an outlet for the fluid to be heated connected to the other end of the coil stack.
6 more elements
Dependencies are inferred from the claim text.