Abstract

A fluid heater comprises an enclosed combustion chamber, at least one burner operatively coupled to the enclosed combustion chamber and a heat transfer section. The heat transfer section has a first end operatively coupled to the enclosed combustion chamber, a second end, an outer wall defining a closed chamber therein, a fluid inlet port coupled to the outer wall in fluid communication with the chamber and a fluid outlet port coupled to the outer wall in fluid communication with the chamber. A plurality of tubes have an opened first end, an opposite opened second end and a chamber extending therebetween, wherein the plurality of tubes are mounted within the heat transfer section so that an outside wall of each of the plurality of tubes and an inside wall of the heat transfer section define the closed chamber. Each of the tube chambers are in fluid communication with the enclosed combustion chamber. A negative pressure source is operatively coupled to the heat transfer section second end and is in fluid communication with each of the plurality of tube chambers, where a continuous flow of hot fluid is produced at the heat transfer section fluid outlet port.

IPC Classes  ?

• F24H 1/12 - Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium

Abstract

A fluid heater comprises an enclosed combustion chamber, at least one burner operatively coupled to the enclosed combustion chamber and a heat transfer section. The heat transfer section has a first end operatively coupled to the enclosed combustion chamber, a second end, an outer wall defining a closed chamber therein, a fluid inlet port coupled to the outer wall in fluid communication with the chamber and a fluid outlet port coupled to the outer wall in fluid communication with the chamber. A plurality of tubes have an opened first end, an opposite opened second end and a chamber extending therebetween, wherein the plurality of tubes are mounted within the heat transfer section so that an outside wall of each of the plurality of tubes and an inside wall of the heat transfer section define the closed chamber. Each of the tube chambers are in fluid communication with the enclosed combustion chamber. A negative pressure source is operatively coupled to the heat transfer section second end and is in fluid communication with each of the plurality of tube chambers, where a continuous flow of hot fluid is produced at the heat transfer section fluid outlet port.

IPC Classes  ?

• F24H 9/20 - Arrangement or mounting of control or safety devices
• F24H 1/36 - Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water chamber arranged adjacent to the combustion chamber or chambers, e.g. above or at side the water chamber including one or more fire tubes
• F23L 7/00 - Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam
• F23N 1/08 - Regulating fuel supply conjointly with another medium, e.g. boiler water