GB2262977A

GB2262977A - Boiler

Info

Publication number: GB2262977A
Application number: GB9127545A
Authority: GB
Inventors: Stephen William John Grant
Original assignee: Alley Enterprises Ltd
Current assignee: Alley Enterprises Ltd
Priority date: 1991-12-31
Filing date: 1991-12-31
Publication date: 1993-07-07
Anticipated expiration: 2011-12-31
Also published as: GB2262977B; GB9127545D0

Abstract

An enclosed boiler 1 comprises a base, a top 3, a main rear tank 4, a pair of main side tanks 6, 7, an intermediate tank 15 and a front accessway covered by a removable door 8. The boiler is fired by a gas burner 12, which delivers flame and hot gases through a tortuous passageway defined by baffle and associated deflector tray assemblies 30 which are removable through the accessway for cleaning. Each tray assembly comprises a transverse baffle plate 31 having an inlet opening 32, a front deflector plate 35 and two spaced-apart intermediate deflector plates 36, 37. The boiler may be wall mounted. <IMAGE>

Description

"A Boiler" The invention relates to an enclosed boiler and in particular to a gas boiler which is adapted for mounting on a wall.

Numerous constructions of enclosed boilers are known. There is, however, a need for an improved construction of enclosed boiler which will be both thermally efficient and easy to clean and use.

This invention is directed towards providing such an improved construction of boiler.

According to the invention there is provided a boiler comprising a base, a top, sidewall means extending between the base and top, portion of the sidewall means defining water carrying tanks and another portion of the sidewall means defining an accessway having an access door which is movable or removable for cleaning, the base, top and sidewall means defining an enclosure through which flame and hot gasses are led from an inlet to a flue gas outlet, and at least two baffle and associated deflector tray assemblies which are removable through the accessway for cleaning, each baffle and associated deflector tray assembly having an inlet opening for hot gases and defining a tortuous flue gas passageway which extends transversely across the boiler.

In one embodiment of the invention each baffle and deflector tray assembly comprises a transversely extending baffle plate and a deflector means extending upwardly from the baffle plate.

Preferably deflector means comprises a front deflector plate and at least two spaced-apart intermediate deflector plates which are spaced-apart from the sidewall means and define, together with the front deflector plate a flue gas passageway which extends successively rearwardly and forwardly from the front deflector plate as the gas travels along the flue gas passageway.

In one arrangement the boiler includes an intermediate longitudinally extending intermediate tank and the intermediate deflector plates are spaced-apart from the intermediate tank and define therewith a transversely extending flue gas passageway having a first rearward leg, a first forward leg, a second rearward leg and a second forward leg.

Preferable the inlet opening is defined by the baffle plate.

In one arrangement the deflector plates are attached to the associated baffle plates.

There may be at least three or at least four and associated deflector tray assemblies.

In a preferred arrangement the lowermost baffle and deflector tray assembly is supported on mounting lugs provided on the boiler.

In one embodiment of the invention the boiler sidewall means is substantially rectangular in transverse cross-section and comprises a rear portion, a pair of side portions extending outwardly of the rear portion, and a front portion, the rear portion and side portions being at least partially defined by water-carrying tanks.

In one embodiment of the invention the boiler includes an intermediate longitudinally extending tank. In this case the baffle and deflector tray assembly includes a cut-out portion for accommodating the intermediate tank. In this arrangement the intermediate tank is connected to the rear tank and extends outwardly towards but spaced-apart from the front portion.

In one embodiment of the invention the base of the boiler is at least partially defined by the water-carrying bottom tank.

In a preferred arrangement the top of the boiler has an opening defining a flue gas outlet.

Typically, hot gases are delivered to the inlet from a burner such as an oil or gas burner.

In a particularly preferred embodiment of the invention, the boiler is adopted for wall mounting.

The invention will be more clearly understood from the following description thereof, given by way of example only with reference to the accompanying drawings, in which: Fig. 1 is a perspective view from the rear of a boiler according to the invention with portion of a rear tank of the boiler and the baffle arrangement removed, Fig. 2 is a perspective partially cut-away view from the front of the boiler, Figs. 3 to 5 are plan views in the direction of the arrows III, IV and V respectively in Fig. 2, Fig. 6 is a perspective view of a baffle arrangement of the boiler, and Fig. 7 is an exploded perspective view of the baffle arrangement.

Referring to the drawings, there is illustrated a boiler according to the invention indicated generally by the reference numeral 1. The boiler 1 comprises a base 2, a top 3 and a sidewall means, which in this case is defined by a main rear tank 4, a pair of main side tanks 6, 7 extending outwardly from the main rear tank 4 and a front accessway 5 which is covered by a movable or removable front access door 8. The base 2, top 3, main tanks 4, 6, 7 and front door 8 define an enclosure through which flame and hot gases are led from an inlet which is, in this case, supplied by a gas burner 12 to an outlet 15 in the top 3 of the boiler to an exhaust gas flue 16. The gas burner 12 is illustrated only diagrammatically in the drawings.

In this case the boiler 1 also includes an additional intermediate longitudinally extending tank 15 which is connected to the rear tank and extends outwardly towards but spaced-apart from the front accessway. The tanks 4, 5, 6, 15 are interconnected for water circulation through the boiler from a water inlet to water outlet (not shown) which are typically connected to a hot water central heating system.

The top 3 of the boiler, in this case, has an outlet formed therein for connection to an outlet flue 16 through which exhaust gases are led from the boiler.

The boiler is provided with at least two, and in this case, four baffle and associated deflector tray assemblies 30 which are removable through the accessway 5 for cleaning. Each baffle and associated deflector tray assembly 30 comprises a transversely extending baffle plate 31 which has an inlet opening 32 and is also provided with a central cut-out 33 to accomodate the additional intermediate tank 15 of the boiler.

The deflector means comprises a front deflector plate 35 and two spaced-apart intermediate deflector plates 36, 37 which are spaced-apart both from the side tanks of the boiler and also from the intermediate tank 15 and which define, together with the side tanks 6, 7, rear tank 4, intermediate tank 15 and front deflector plate 35 a flue gas passageway which extends successively rearwardly and forwardly from the front deflector plate 35 as the gas travels along the flue gas passageway.

In more detail, and referring particularly to Fig. 7, hot gases entering the passageway through the inlet opening 32 are first directed rearwardly between the intermediate deflector plate 36 and the adjacent side tank and are then turned through 90" by deflecting off the rear tank 4 and are then directed forwardly through a first forward leg defined between the intermediate deflector plate 36 and the adjacent additional tank 15. The gases are then turned through 1800 by impinging against the front deflector plate 35 and are turned into a second rearwardly extending leg defined between the intermediate tank 15 and the intermediate deflector plate 37.

Finally the gases are impinged on the rear tank 4 of the boiler and are again turned through 1800 and directed forwardly between the intermediate deflector plate 37 and the adjacent side tank. The gases are then delivered upwardly into the inlet opening 32 of the following baffle plate and tray assembly. It will be noted that the opening 40 of the following tray assembly is offset from the inlet opening 32.

The gases are then led through the second baffle tray and deflector assembly, in which they are first led rearwardly, then forwardly, then rearwardly again and then forwardly again for discharge through an opening 45 into the third baffle tray and deflector assembly. In this baffle tray and deflector assembly, the gases are led firstly rearwardly, then forwardly, then rearwardly again and finally forwardly for discharge through an opening 47 into a fourth and final baffle and deflector tray assembly in which the gases are led firstly rearwardly, then forwardly, then rearwardly and finally forwardly and upwardly into the flue gas outlet.

The lowermost baffle and deflector tray assembly is mounted on mounting lugs on the boiler. The following baffle tray and deflector assemblies may be either mounted to the lower tray assembly or on separate mounting lugs of the boiler.

For cleaning, the front door 8 of the boiler is removed to expose the accessway 5. The uppermost of the baffle and deflector tray assemblies is removed somewhat in the manner of removing a drawer from a desk. The third and following baffle and deflector tray assemblies are removed in a similar way and all the heat exchange surfaces of the boiler and baffle and deflector tray assemblies are thoroughly cleaned. When cleaning is complete the baffle and deflector tray assemblies are then reassembled and the access door fitted to the boiler.

The boiler may be adapted either for wall mounting or for floor mounting.

The boiler is not only highly thermally efficient by virtue of the tortuous passageway through which the hot gases and flames from the burner must pass, but also may be readily easily cleaned by simply removing the individual baffle and deflector tray assemblies.

Many variations on the specific embodiment of the invention described may be readily apparent. For example, while for cheapness of construction it is preferable that the boiler be of general rectangular shape in transverse cross-section, it may be of any suitable shape or configuration, such as, cylindrical, hexagonal or the like.

These and many other modifications will be readily apparent and accordingly, the invention is not limited to the embodiments hereinbefore described which may be varied in both construction and detail.

Claims

1. A boiler comprising a base, a top, sidewall means extending between the base and top, portion of the sidewall means defining water carrying tanks and another portion of the sidewall means defining an accessway having an access door which is movable or removable for cleaning, the base, top and sidewall means defining an enclosure through which flame and hot gasses are led from an inlet to a flue gas outlet, and at least two baffle and associated deflector tray assemblies which are removable through the accessway for cleaning, each baffle and associated deflector tray assembly having an inlet opening for hot gases and defining a tortuous flue gas passageway which extends transversely across the boiler.

2. A boiler as claimed in claim 1, wherein each baffle and deflector tray assembly comprises a transversely extending baffle plate and a deflector means extending upwardly from the baffle plate.

3. A boiler as claimed in claim 2, wherein the deflector means comprises a front deflector plate and at least two spaced-apart intermediate deflector plates which are spaced-apart from the sidewall means and define, together with the front deflector plate a flue gas passageway which extends successively rearwardly and forwardly from the front deflector plate as the gas travels along the flue gas passageway.

4. A boiler as claimed in claim 3, wherein the boiler includes an intermediate longitudinally extending intermediate tank and the intermediate deflector plates are spaced-apart from the intermediate tank and define therewith a transversely extending flue gas passageway having a first rearward leg, a first forward leg, a second rearward leg, and a second forward leg.

5. A boiler as claimed in any of claims 2 to 4 wherein the inlet opening is defined by the baffle plate.

6. A boiler as claimed in any of claims 2 to 5, wherein the deflector plates are attached to the associated baffle plates.

7. A boiler as claimed in any preceding claim, wherein there are at least three baffle and associated deflector tray assemblies.

8. A boiler as claimed in any preceding claim, wherein there are at least four baffle and associated deflector tray assemblies.

9. A boiler as claimed in any preceding claim, wherein at least a lowermost baffle and deflector tray assembly is supported on mounting lugs provided on the boiler.

10. A boiler as claimed in any preceding claim, wherein the boiler sidewall means is substantially rectangular in transverse cross-section and comprises a rear portion, a pair of side portions extending outwardly of the rear portion, and a front portion, the rear portion and side portions being at least partially defined by water carrying tanks.

11. A boiler as claimed in claim 10, wherein the boiler includes an intermediate longitudinally extending tank.

12. A boiler as claimed in claim 11, wherein the baffle and deflector tray assembly includes a cut-out portion for accommodating the intermediate tank.

13. A boiler as claimed in claim 11 or 12, wherein the intermediate tank is connected to the rear tank and extends outwardly towards but spaced-apart from the front portion.

14. A boiler as claimed in any preceding claim, wherein the base of the boiler is at least partially defined by the water-carrying bottom tank.

15. A boiler as claimed in any preceding claim, wherein the top of the boiler has an opening defining a flue gas outlet.

16. A boiler as claimed in any preceding claim, wherein hot gases are delivered to the. inlet from a burner.

17. A boiler as claimed in claim 16, wherein the burner is an oil burner.

18. A boiler as claimed in claim 16, wherein the burner is a gas burner.

19. A boiler as claimed in any preceding claim, which is adapted for wall mounting.

20. A boiler substantially as hereinbefore described with reference to the accompanying drawings.