Liquid fuel burner

Claim 2

A liquid fuel burner comprising a burner casing consisting of an inner casing defining therein a gasification chamber communicating with flame holes and an outer casing surrounding said inner casing and defining an airflow passage between it and said inner casing, a Silocco fan disposed in the central portion of said gasification chamber to suck the air in said airflow passage at the center thereof and disperse the same radially outwardly, a fuel atomizer provided in the central portion of said Silocco fan for rotation therewith and adapted to atomize the liquid fuel under the influence of centrifugal force, means for preheating the air passing through said air flow passage and said gasification chamber, and means for supplying the fuel to said atomizer.

Claim 3

A liquid fuel burner as defined in claim 1, wherein means is provided to rotate said Silocco fan at the initiation of combustion at a rate lower than that in the normal combustion operation.

Claim 4

A liquid fuel burner as defined in claim 1, wherein said airflow passage formed between the inner and outer casings is located adjacent a combustion region and a heater is provided around that portion of the outer peripheral surface of said inner casing which extends into said airflow passage, said heater being energized only at the initiation of combustion.

Claim 5

A liquid fuel burner as defined in claim 3, wherein the air-sucking opening of said aIrflow passage is shielded from the combustion region by a shielding member and air is sucked into said airflow passage from the side remote from the combustion region with respect to said shielding member.

Claim 6

A liquid fuel burner as defined in claim 1, wherein said atomizer is a cup-shaped depression formed at the center of an upper plate of said Silocco fan and having a number of atomizing holes perforated in the peripheral wall thereof and said fuel supply means is a fuel supply pipe extending upwardly and exteriorly of said Silocco fan with the discharge end thereof being spaced above the upper plate of said Silocco fan and extending downwardly toward said atomizer.

Claim 7

A liquid fuel burner as defined in claim 5, wherein fuel-receiving plates are mounted on the fuel supply pipe within the gasification chamber for receiving the fuel flowing down on the outer wall of said pipe.

Claim 8

A liquid fuel burner as defined in claim 1, wherein a mixing ring, a combustion ring and a headplate for closing the open top end of said gasification chamber are provided on the open top edge of said inner casing one on another in the order mentioned with circumferentially spaced spacers interposed between each other, the resultant slit-shaped gaps being utilized as flame openings, and the inner edge of said mixing ring is projected into the gasification chamber.

Claim 9

A liquid fuel burner as defined in claim 1, which further comprises a fuel supply device comprising a main tank provided with a level adjusting mechanism and having an inlet for fuel from a fuel tank, an auxiliary tank smaller in capacity than said main tank communicating with said main tank at a level above a set level of fuel in the main tank and having an outlet for fuel at a level lower than said communicating level, and a pump for pumping the fuel from said main tank into said auxiliary tank, the pump having a pumping capacity greater than the flow rate of fuel discharged through said outlet; and a fuel supply pipe for supplying the fuel to said atomizer is communicated to said outlet through a solenoid valve.

Claim 10

A liquid fuel burner comprising an inner casing defining a gasification chamber therein and having an air passage hole formed in the bottom wall thereof; said inner casing further having a mixing ring smaller in inner diameter than said inner casing, a combustion ring and a closure headplate mounted on the open top edge thereof with circumferentially spaced spacers interposed between each other so as to form slit-shaped flame openings; an outer casing surrounding said inner casing; an airflow passage formed between said inner and outer casings with a portion thereof located adjacent the flames formed at said flame openings and with an air-sucking end thereof being covered by the flexed edges of said inner and outer casings from above and the radially outside thereof; a heater wound around the outer peripheral surface of said inner casing within said airflow passage; a Silocco fan disposed in the center of said gasification chamber to suck the air in said airflow passage through said air passage hole in the bottom wall of said inner casing at the center thereof and disperse the same radially outwardly by the blades thereof; an atomizer rotating integrally with said Silocco fan to disperse the liquid fuel supplied thereto radially outwardly under the influence of centrifugal force; a mounting frame provided beneath said outer casing with a space therebetween; a motor mounted on said mounting frame with the drive shaft thereof extending upwardly and connected directly to said Silocco fan; and a fan fixedly mounted on the drive shaft of said motor for rotation therewith to cool said motor and form a layer of airflow in the space between said outer casing and said mounting frame.

Claim 11

A liquid fuel burner comprising an inner casing defining a gasification chamber therein and having an air passage hole formed in the bottom wall thereof; said inner casing further having a mixing ring smaller in inner diameter than said inner casing, a combustion ring and a closure headplate mounted on the open top edge thereof with circumferentially spaced spacers interposed between each other so as to form slit-shaped flame openings; an outer casing surrounding said inner casing; an airflow passage formed between said inner and outer casings with a portion thereof located adjacent the flames formed at said flame openings and with an air-sucking end thereof being covered by the flexed edges of said inner and outer casings from above and the radially outside thereof; a heater wound around the outer peripheral surface of said inner casing within said airflow passage; a Silocco fan disposed in the center of said gasification chamber to suck the air in said airflow passage through said air passage hole in the bottom wall of said inner casing at the center thereof and disperse the same radially outwardly by the blades thereof; an atomizer rotating integrally with said Silocco fan to disperse the liquid fuel supplied thereto radially outwardly under the influence of centrifugal force; a mounting frame provided beneath said outer casing with a space therebetween; a motor mounted on said mounting frame with the drive shaft thereof extending upwardly and connected directly to said Silocco fan; and a fan fixedly mounted on the drive shaft of said motor for rotation therewith to cool said motor and form a layer of airflow in the space between said outer casing and said mounting frame.