GB2180333A

GB2180333A - Convection air heating in simulated solid fuel gas fires

Info

Publication number: GB2180333A
Application number: GB08521403A
Authority: GB
Inventors: Thomas Raymond Collier
Original assignee: Individual
Current assignee: Individual
Priority date: 1985-08-28
Filing date: 1985-08-28
Publication date: 1987-03-25
Also published as: GB8521403D0

Abstract

A gas fire utilizing a convector effect and which can be installed to operate with a fluepipe, comprises an outer liner member (2) to be inserted into a fire cavity in a wall and an inner convector box member (3) to be spaced by an air space from the outer liner (2), the inner convector box member (3) containing a gas combustion arrangement and having a vent (29) for products of combustion, the vent (29) bridging the air space between the inner convector box member (3) and the outer liner (2) and passing through the outer liner (2) to a flue pipe, the inner and outer members being so formed that when assembled together they need project from a wall, in a cavity in which they are mounted, by no more than 10 cm, preferably by no more than 5 cm. <IMAGE>

Description

SPECIFICATION Gas fires The invention relates to gas fires and particu larly to gas fires utilizing a convector effect.

Many modern houses were built without chimmneys and thus cannot have class 1 gas fires installed therein. Class 2 gas fires can be installed in houses with flue pipes, for example a 12.5 cm (5 inch) metal or concrete flue pipe.

Existing Class 2 gas fires are, however, generally inefficient, are unattractive in appear ance and project a considerable distance out from a fire back in a wall in which the flue pipe is mounted, that is to say they substan tially need to stand free on a hearth.

According to the invention a gas fire com prises an outer liner member to be inserted into a fire cavity in a wall and an inner con vector box member to be spaced by an air space from the outer liner, the inner convector box member containing a gas combustion ar rangement and having a vent for products of combustion, the vent bridging the air space between the inner convector box member and the outer liner and passing through the outer liner to a flue pipe.

Advantageously the inner and outer mem bers are so formed that when assembled to gether they need project from a wall, in a cavity in which they are mounted, by no more than 10 cm, preferably by no more than 5 cm.

Preferably the inner convector box member has a ceramic glass front, advantageously an openable door, and the gas combustion ar rangement is an arrangement of the kind set out in my co-pending application 8232446 published under number GB 2 131 158A.

The outer liner member may thus line a fire back and define, by its inner surface, the outer wall of the air space. The inner wall of the air space is formed by the outer surface of the inner convector box member and the air space forms a duct through which air is drawn to form convection currents to heat a room in which the fire is installed. The inner convector box member preferably has out wardly extending flanges at its front edge, the flanges extending for the height of the front edge of the inner member and bridging across the air space at each side. A bottom wall of the inner member is raised by spacers or legs, above a bottom wall of the outer member to form an entry duct for the air space, through which entry duct cold air can be drawn in.

The air, heated by the walls of the inner member as it flows through the air space, exhausts from the front of the fire above the inner member and below a top wall of the outer member.

The invention is diagrammatically illustrated by way of example with reference to the accompanying drawings, in which: Figure 1 is an exploded perspective view of inner and outer members of one embodiment of a gas fire according to the invention; Figure 2 is a side elevation corresponding to Fig. 1; Figure 3 is a front elevation corresponding to Fig. 1; and Figure 4 is a side elevation of the gas fire of Figs. 1 to 3 with the components assembled.

Referring to the drawings a gas fire comprises an outer liner member 1 and an inner convector box member 2.

The outer liner member 1 comprises a base plate 4, back plate 5, a sloping back plate 6, inwardly sloping side plates 7 and 8, a roof plate 9, a parallel surround formed by plates 10, 11 and 12 and a front flange formed by side plates 13 and 14 and a top plate 15.

The outer liner member 2 can preferably be installed in a cavity in a wall such that the flange formed by the plates 13, 14 and 15 extends forwardly from the wall by a distance d, Fig. 2 which need be no more than 10 cm and is preferably only 5 cm.

The inner convector box member 3 comprises a base plate 16 supported on support members 17, a back plate 18, a sloping back plate 19, inwardly sloping side walls 20 and 21, a roof plate 22, parallel side plates 23 and 24, a downwardly sloping roof plate 25 with a lip 26 at its front edge, laterally and rearwardly extending angle strips 27 and 28 at the front edges of the side plates 23 and 24 respectively and a tubular trunking 29 of rectangular section extending horizontally rearwardly at the upper edge of the sloping back plate 19. An aperture 30, Fig. 2, is provided in the sloping back plate 6 of the outer member 2 to enable the trunking 29 to pass therethrough as shown in Fig. 4.

Fig. 2 indicates that a glass front panei 31 may be provided to cover the open front of the inner member 3 below the lip 26 and that a simulated solid fuel fire 32, advantageously of the kind described in my co-pending application 8232446 published under number GB 2 131 158A, may be provided in the lower end of the inner convector box member 3.

Fig. 4 shows arrows 33 indicating combustion air entering the lower part of the inner member 3 to permit combustion of gas and passing as products of combustion upwardly through the inner member 3 to pass out through the vent 29 to a flue.

Arrows 34 indicate air drawn in between the base plates 4 and 16, passing upwardly between the rear plates 4 and 18 and 5 and 19, and also, although not shown, between the side plates 7, 20, 8, 21, 10, 23, 11, 24, to pass outwardly between the top plates 9, 22 and 12, 25 after being heated by heat exchange through the hot walls 18 to 25 of the inner member 3. Some heat radiation will occur from the glass plate 31 and the glowing simulated coals of the fire 32 will be visible through the glass plate 31.

The invention can thus provide a gas fire which can be attractive in appearance, particularly it need not look like a gas fire but can resemble a solid fuel burning fire, can be efficient, for example 65 to 70C efficient, and can be installed without the need for a full chimmney, that is to say can operate with a flue pipe. Particularly it need only project a small distance forward from a wall in a cavity in which it is mounted.

Claims

1. A gas fire comprising an outer liner member to be inserted into a fire cavity in a wall and an inner convector box member to be spaced by an air space from the outer liner, the inner convector box member containing a gas combustion arrangement and having a vent for products of combustion, the vent bridging the air space between the inner convector box member and the outer liner and passing through the outer liner to a flue pipe.

2. A gas fire according to claim 1, in which the inner and outer members are so formed that when assembled together they need project from a wall, in a cavity in which they are mounted, by no more than 10 cm.

3. A gas fire according to claim 1, in which the inner and outer members are so formed that when assembled together they need project from a wall, in a cavity in which they are mounted, by no more than 5 cm.

4. A gas fire according to any one of claims 1 to 3, in which the inner convector box member has a ceramic glass front.

5. A gas fire according to claim 4, in which the ceramic glass front is an openable door.

6. A gas fire according to any one of claims 1 to 5, in which the gas combustion arrangement is an arrangement of the kind set out in co-pending application 8232446 published under number GB 2 131 158A.

7. A gas fire according to any one of claims 1 to 6, in which the outer liner member iines a fire back and defines, by its inner surface, the outer wall of the air space, the inner wall of the air space is formed by the outer surface of the inner convector box member and the air space forms a duct through which air is drawn to form convection currents to heat a room in which the fire is installed.

8. A gas fire according to any one of claims 1 to 7, in which the inner convector box member has outwardly extending flanges at its front edge and the flanges extend for the height of the front edge of the inner member and bridge across the air space at each side.

9. A gas fire according to any one of claims 1 to 8, in which a bottom wall of the inner member is raised by spacers or legs, above a bottom wall of the outer member to form an entry duct for the air space, through which entry duct cold air can be drawn in.

10. A gas fire according to any one of claims 1 to 9, in which air, heated by the walls of the inner member as it flows through the air space, exhausts from the front of the fire above the inner member and below a top wall of the outer member.

11. A gas fire substantially as hereinbefore described and illustrated with reference to the accompanying drawings.