ELECTRIC SUSPENDED RADIANT DISK HEATER APPARATUS

Abstract

There is provided an electric suspended radiant disk heater apparatus comprising: a central and vertical ceiling mount pole for hanging from a ceiling at an upper end thereof in use; a radiant heater disk element fastened at a lower end thereof, the radiant heater disk element being substantially co-axial with the ceiling mount pole, being substantially perpendicular to the ceiling mount pole and extending radially from the lower end of the pole; and an electric heater element thermally coupled to the radiant heater disk element to heat the radiant heater disk to radiate heat from a radiant heat emitting undersurface thereof.

Claims

1. An electric suspended radiant disk heater apparatus comprising: a central and vertical ceiling mount pole for hanging from a ceiling at an upper end thereof in use; a radiant heater disk element fastened at a lower end thereof, the radiant heater disk element being substantially co-axial with the ceiling mount pole, being substantially perpendicular to the ceiling mount pole and extending radially from the lower end of the pole; and an electric heater element thermally coupled to the radiant heater disk element to heat the radiant heater disk to radiate heat from a radiant heat emitting undersurface thereof.

2. A radiant disk heater apparatus as claimed in claim 1, wherein the electric element is configured to heat the radiant heater disk elements to approximately 380° C.

3. A radiant disk heater apparatus as claimed in claim 2, wherein the radiant heater disk element comprises an alloy comprising a glass temperature of approximately 430° C.

4. A radiant disk heater apparatus as claimed in claim 1, wherein radiant heater disk element comprises a radiant underplate and a backing plate thereby defining a void therebetween and wherein the electric element is located within the void and thermally coupled to a rear surface of the radiant underplate.

5. A radiant disk heater apparatus as claimed in claim 4, further comprising ceramic insulation within the void.

6. A radiant disk heater apparatus as claimed in claim 4, wherein the radiant underplate is die cast.

7. A radiant disk heater apparatus as claimed in claim 4, wherein the rear surface of the radiant underplate comprises at least one raceway for receipt of the electric element therein.

8. A radiant disk heater apparatus as claimed in claim 7, wherein the at least one raceway comprises cooperative opposite heating element flanges configured for crimping together to substantially enclose the heating element therebetween.

9. A radiant disk heater apparatus as claimed in claim 8, wherein at least one raceway is a plurality of raceways having a circular shape and co-axial with respect to the radiant heater disk element.

10. A radiant disk heater apparatus as claimed in claim 4, wherein the radiant underplate has a radial convex curvature.

11. A radiant disk heater apparatus as claimed in claim 10, wherein the radiant underplate comprises an outer substantially cylindrical portion transitioning to a substantially convex portion.

12. A radiant disk heater apparatus as claimed in claim 11, wherein the cylindrical portion defines an upper recess for receipt of a seal therein to seal the radiant underplate and the backing plate.

13. A radiant disk heater apparatus as claimed in claim 4, wherein the radiant underplate comprises concentric heat dissipation fins.

14. A radiant disk heater apparatus as claimed in claim 4, further comprising a heat shield offset rearwardly from the back plate thereby defining an air gap between the heat shield and the back plate.

15. A radiant disk heater apparatus as claimed in claim 10, wherein the heat shield juts radially beyond the back plate to define a convected air collection port to direct convected air into the air gap.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Notwithstanding any other forms which may fall within the scope of the present invention, preferred embodiments of the disclosure will now be described, by way of example only, with reference to the accompanying drawings in which:

[0022] FIG. 1 shows a side elevation view of an electric suspended radiant disk heater apparatus;

[0023] FIG. 2 shows a bottom perspective view of the apparatus;

[0024] FIG. 3 shows a top perspective view of the apparatus;

[0025] FIG. 4 shows a further bottom perspective view of the apparatus illustrating the heat dissipation fins located on a radiant heat emitting undersurface of the apparatus;

[0026] FIG. 5 shows a bottom plan view of the apparatus illustrating the configuration of the heat dissipation fins;

[0027] FIG. 6-8 show various configurations of heat dissipation fins;

[0028] FIGS. 9-10 show cross-sectional views of heater element raceways and the manner for the entrapment of an elongate electric heater element therein;

[0029] FIG. 11 shows heater element raceways located on a rear surface of a radiant underplate of the radiant heater disk element;

[0030] FIG. 12 shows a cross-sectional elevation view of the radiant heater disk element showing the interface between a backing plate and a radiant underplate;

[0031] FIG. 13 shows a further cross-sectional elevation view further illustrating a configuration of a rearward heat shield defining an airgap between the heat shield and the backing plate; and

[0032] FIG. 14 shows a cross-sectional elevation view of the radiant heater disk element.

DESCRIPTION OF EMBODIMENTS

[0033] FIG. 1 shows a side elevation view of an electric suspended radiant disk heater apparatus 1.

[0034] The apparatus 1 comprises a central vertical ceiling mount pole 3 for hanging from a ceiling 4 in use and a radiant disk heater element 2 fastened at a lower end of the ceiling mount pole 3.

[0035] The radiant heater disk element 2 is substantially coaxial with the ceiling mount pole 3, is substantially perpendicular to the ceiling mount pole 3 and furthermore extends radially from the lower end of the pole 3.

[0036] As is shown in at least FIG. 2, the radiant disk heater element 2 comprises a circular cross-section.

[0037] The apparatus 1 further comprises an electric heater element thermally coupled to the radiant heater disk element 2 to heat the radiant disk heater element 2 to radiate heat from a radiant heat emitting undersurface 5 thereof. Electric supply wiring may travel through the mounting pole 3.

[0038] An escutcheon plate 6 may be provided at the interface of the ceiling 4 and the mounting pole 3 and a flanged bracket 7 between the mounting pole 3 and the radiant heater disk element 2.

[0039] The electric heater element may be configured to heat the radiant heater disk element 2 to approximately 380° C.

[0040] As is shown in FIG. 12, the radiant disk heater element 2 may comprise a radiant underplate 8 and a backing plate 9 thereby defining a void 10 therebetween. The electric element may be located within the void and thermally coupled to a rear surface of the radiant underplate 8.

[0041] The radiant underplate may be made from an aluminium alloy.

[0042] A circular seal 11 may locate within a recess 12 of the radiant underplate 8 so as to seal the backing plate 9 against the radiant underplate 8.

[0043] FIG. 13 shows a further cross-sectional view of the radiant heater disk element 2 illustrating the juncture between the backing plate 9 and the radiant underplate 8.

[0044] The void 10 between the radiant underplate 8 and the backing plate 9 may be filled with a ceramic insulator.

[0045] FIG. 13 further illustrates the location of the electric element 12 thermally coupled to a rear surface of the radiant underplate 8.

[0046] In this regard, as a substantially shown in FIG. 11, the rear surface of the radiant underplate 8 may comprise circular raceways 13 for receipt of the electric element 12 therein and for enhancing thermal conductivity between the electric element 12 and the radiant underplate 8.

[0047] FIG. 9-10 shows the manner for the securement of the linear electric heater elements 12 within the raceways 13 wherein, in the cross-sectional illustration shown, each raceway 13 comprises lateral flanges 14 that are crimped to at least partially surround the electric heater element 12 therebetween.

[0048] FIG. 14 shows the radiant underplate 8 comprising a radial convex curvature. The radiant underplate 8 may be conical and/or stepped as opposed to being curved. As alluded to above, the shape of the radiant underplate 8 may control the heating footprint there underneath wherein the convex curvature may be utilised to broaden the heating footprint. In this regard, in embodiments, the radiant underplate 8 may be concave if it were wished to focus the radiant heat on a particular point.

[0049] Furthermore, the radiant heat emitting undersurface 5 may comprise heat dissipation fins 15. FIG. 6-8 show various cross-sectional profiles of the heat dissipation fins 15.

[0050] FIG. 13 further shows the radiant heater disk element 2 comprising a rearward heat shield 16 offset rearwardly from the back plate 9 so as to define an airgap 17 between the heat shield 16 and the back plate 9. The heat shield 16 may be supported away from the back plate 9 by appropriately spaced spacers 18.

[0051] As is also shown in FIG. 13, the heat shield 16 may jut radially beyond the edge of the back plate 9 so as to define a peripheral entrance 19 for collecting convected air rising from the periphery of the radiant underplate 8.

[0052] Embodiments of the heater apparatus may provide 2000 W at 240 V and 8.3 A wherein the electric heater element 12 comprises a resistance of 28.8 ohms. Alternatively, at 120 V, the heater apparatus 1 may comprise a power output of 1800 W at 15 A and wherein the electric heater element 12 comprises a resistance of 8 ohms.

[0053] For a building space surrounded by four walls, a heater apparatus 1 may effectively cover a floor area of approximately 4.5 m.sup.2 wherein the effective heat footprint of the apparatus has a radius of 1.2 m. For building spaces surrounded by two walls, the heater apparatus 1 may cover a floor area of approximately 3.6 m.sup.2 (having a heat footprint radius of approximately 1.1 m) and for substantially open spaces the heater apparatus 1 may cover a floor area of approximately 3 m.sup.2 (having a heat footprint radius of approximately 1 m).

[0054] In one embodiment, the diameter of the radiant heater disk element 2 may be approximately 0.5 m and wherein the radiant heat emitting undersurface may comprise an area of 0.707107 m.sup.2.

[0055] In embodiments, the heater apparatus 1 may comprise three concentric electric heater elements 12 having respective diameters of 150 cm, 210 cm and 350 cm. Alternatively, the heater apparatus 1 may comprise two concentric heater elements 12 having respective diameters of approximately 238.78 cm and 378.8 cm. In alternative embodiments, the heater elements 12 may be spiralled so as to provide adequate coverage and thermal contact for the underplate 8.

[0056] The heater elements 12 are ideally evenly spaced so as to provide uniform heating of the underplate 8 reducing or eliminating hot and cold spots.

[0057] The foregoing description, for purposes of explanation, used specific nomenclature to provide a thorough understanding of the invention. However, it will be apparent to one skilled in the art that specific details are not required in order to practice the invention. Thus, the foregoing descriptions of specific embodiments of the invention are presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the invention to the precise forms disclosed; obviously, many modifications and variations are possible in view of the above teachings. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, they thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. It is intended that the following claims and their equivalents define the scope of the invention.