Heater
OwnerDavid Mervin Jonesinventor
Life of this patent
Estimating the term…
Abstract
A radiant heater includes a generally U-shaped radiative heating element having a first straight section, a second straight section, and an interconnecting U-shaped section. The non-connected end of the first straight section is arranged for communication with a burner and the non-connected end of the second straight section is arranged for communication with an extractor for extracting combustion gases from the tube. A redirecting element including opposed helical vanes, each executing a 180° turn about a central, common tube, is arranged within the first straight section so as to redirect, in use, at least a portion of the combusted gases flowing within the upper half of the tube towards the lower half, and gases flowing in the lower half towards the upper half.
Claims7
A radiant heater comprising:
- a radiant heating element in the form of a tube having first and second ends, wherein the tube consists of first and second substantially straight sections generally parallel to one another, connected by a U-shaped tube;
- a burner communicating with the first end of the tube for delivering combustion gases into the first straight section;
- and
- a redirecting element which is disposed in the first straight section so as to redirect, in use, at least a portion of the combustion gases flowing within the upper half of the first section of the tube towards the lower half of said section of the tube;
- wherein the radiant heater comprises an extractor communicating with the second end of the tube for extracting gases from the second straight section;
- and
- wherein said redirecting element comprises at least one pair of longitudinally extending helical vanes, each pair being arranged diametrically opposite one another, the first longitudinally extending vane with a surface that extends downwards from the upper half of the first section of the tube into the lower half of said section of the tube, and the second vane of the or each pair having a surface that extends upwards from the lower half of the first section of the tube into the upper half of said section of the tube, wherein the or each pair of vanes are supported on a longitudinal post that extends centrally within the tube;
- and
- wherein a fore end of the post has a cone arranged in use to urge gases being drawn towards the redirecting element outwards towards the vanes.
Dependencies are inferred from the claim text.