GB2243905A

GB2243905A - A flue draught divertor

Info

Publication number: GB2243905A
Application number: GB9010564A
Authority: GB
Inventors: Alan Thurlow; Terry J Howell
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-05-11
Filing date: 1990-05-11
Publication date: 1991-11-13
Also published as: GB9010564D0

Abstract

A flue draft divertor 10 comprises an inlet 11 which is fitted to a flue outlet 11a of a gas fire 12, and a divertor means 13 having an air inlet 18 positioned towards the lower end of the divertor means 13. Air entering the divertor means 13 by the air inlet 18 oxidises the products of combustion 16 whilst they are travelling around the divertor means 13. Should the chimney 15 become blocked, the products of combustion 16 will be oxidised by the divertor 13 before they leak out of the gas fire 12 and into a room containing the fire. <IMAGE>

Description

A Flue Diverter This invention relates to a flue draft diverter for removing products of combustion from a fire or stove and into a chimney. The present invention relates particularly to a flue draft diverter suitable for use with a gas fire of the type described in the applicants co-pending British Patent application No 9004788.7, to which reference is directed. Such a gas fire is hereinafter referred to as "of the kind described".

A gas fire of the kind described will burn with large orange and red flames after an initial warm up period.

These flames give a very realistic effect to a solid fuel or log effect open gas fire. In order to produce the large orange and red flames, the gas must be burnt at a high rate. This means that the concentration of the products of combustion in the fire are relatively high. A problem with gas fires of the kind described, is that, should the flue become blocked, the products of combustion cannot escape, and high levels of carbon monoxide and carbon dioxide leak from the gas fire. It is an object of the present invention. to provide a flue draft diverter which will enable good combustion in a gas fire or stove and allow the fire or stove to be within British Standards limits, even when the flue is completely blocked.

According to the invention there is provided, a flue draft diverter for removing products of combustion from a stove or fire comprising an inlet joinable with an outlet of the stove or fire, for receiving the products of combustion from the stove or fire; an outlet through which the products of combustion may exit to enter a chimney; and diverter means positioned between the inlet and the outlet for diverting the products of combustion entering via the inlet before they pass through the outlet.

By providing diverter means, the products of combustion spend a relatively longer time in the flue, and during this time any noxious gases such as carbon monoxide and carbon dioxide may be substantially burnt off. Thus, in the event that the flue is blocked at the outlet the products of combustion will have been substantially converted into non-toxic products. Any fumes then leaking from the stove or fire into a room containing the stove or fire, will contain low levels of carbon dioxide and carbon monoxide.

Preferably the diverter means is substantially cuboid in shape and serves to sealably connect the inlet and the outlet. Advantageously, the diverter means has an air inlet towards a bottom end of the diverter, and is connected to the inlet and the outlet towards a top end of the diverter.

The air inlet draws the products of combustion down towards the bottom end of the diverter, before they return towards the top end of the diverter to exit via the outlet. While travelling around the diverter in this manner, the products of combustion are oxidised by the air, to form harmless chemical products.

The invention will now be described by way of example only with reference to the accompanying drawings in which: figure 1 is a schematic diagram of a gas fire incorporating a flue draft diverter according to the invention; figure 2 is a schematic representation of the flue draft diverter of figure 1 showing the diverter in more detail; figure 3 is a schematic representation of a rear view of the flue draft diverter of figure 1; figure 4 is schematic representation of the flue from the gas fire which is connectable to the first duct of the diverted; figure 5 is a schematic representation of a flue spiggot to connect the flue to the chimney; figure 6 to 8 are further schematic views of a fire including a flue draft diverter according to the invention;; figures 9 to 15 are schematic representations of further details of a flue draft diverter according to the invention.

Referring to figure 1, a flue draft diverter according to the invention is designated generally by the reference (10). The flue draft diverter (10) comprises an inlet (11) which is fitted to a flue outlet (gila) of a gas fire (12).

The first duct (11) is sealably connected to a diverter (13) which in turn is sealably connected to an outlet (14).

The flue draft diverter (10) is connected to a chimney (15) at the second duct (14). In use, as the gas fire burns, products of combustion (16) are produced which rise up from the fire tray (17) and enter the flue draft diverter (10) via (11), as shown in figure 1. The products of combustion travel around the diverter before passing into the outlet (14) and then out through the chimney (15). The diverter (13) has an air inlet (18) positioned towards a lower end of the diverter (13). The air entering the diverter (13) via the air inlet (18) oxidises the products of combustion (16) whilst they are travelling around the diverter (13).

Should the chimney (15) become blocked, resulting in the products of combustion not being able to exit via the outlet (14), the products of combustion (16) will have been oxidised in the diverter (13) before they leak out of the gas fire (12) and into a room containing the fire. This results in a safer gas fire.

Figure 2 shows in more detail, the flue draft diverter of figure 1 and figure 3 shows in more detail a rear view of the flue draft diverter of figure 1. Referring to figure 4, the inlet (11) is shown in more detail.

Cooperating with the inlet (11) is a flue deflector plate (19), which causes the products of combustion to pass round the plate (19) and into the diverter (13) and then out through the outlet (14) and into chimney (15) whilst drawing air with them. Figure 5 shows in more detail the end of the outlet (14), which comprises a flue spigot (20) which enables the flue draft diverter (10) to be fixed in position in the chimney (15).

Figure 6 to 8 show further views of the flue draft diverter (10) and the gas fire (12). Figures 9 to 15 show further details of the flue draft diverter (10).

Although the flue draft diverter of the present invention have been shown in use in conjunction with a gas fire of the type described, it is to be understood that the flue draft diverter could be used with most types of fire or stove

Claims

CLAIMS 1. A flue draft divertor for removing products of combustion from a stove or fire, the flue draft divertor comprising: an inlet joinable with an outlet of the stove or fire, for receiving the products of combustion from the stove or fire; an outlet through which the products of combustion may exit to enter a chimney; and divertor means positioned between the inlet and the outlet for diverting the products of combustion entering by the inlet before this passes through the outlet.
2. A flue draft divertor as claimed in claim 1 wherein the divertor means is substantially cuboid in shape and serves to sealably connect the inlet and the outlet.
3. A flue draft divertor as claimed in claim 1 or claim 2 wherein the divertor means has an air inlet towards a bottom end of the divertor, and is connected to the inlet and the outlet towards the top end of the divertor.
4. A flue draft divertor substantially as hereinbefore described with reference to the accompanying drawings.