GB1597221A

GB1597221A - Gas-fired burner

Info

Publication number: GB1597221A
Application number: GB328177A
Authority: GB
Original assignee: Parkinson Cowan Appliances Ltd
Current assignee: Parkinson Cowan Appliances Ltd
Priority date: 1978-04-21
Filing date: 1978-04-21
Publication date: 1981-09-03

Description

(54) GAS-FIRED BURNER (71) We, PARKINSON COWAN AP PLIANCES LIMITED, a British Company, of Stechford, Birmingham B33 9AD, do hereby declare the invention for which we pray that a Patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: This invention relates to a gas-fired burner which may be used in a gas-fired domestic appliance such as for example a gas cooker or gas heater, the object of the invention being to provide a gas-fired burner in an improved form.

In accordance with the invention there is provided a gas-fired burner which is of generally elongate configuration and which comprises a pair of body portions which are so shaped and connected together to form a hollow elongate body, there being also provided a divider plate which extends across the interior of said body so as to form, in conjunction with one of said body portions, a single venturi having a fuel inlet end which is disposed at one end of the body, and, in conjunction with the other of said body portions, a single mixing chamber which communicates with said venturi at that end thereof opposite to said inlet end, said mixing chamber being provided, along the length of said hollow body, with a plurality of laterally directed flame ports.

The aforesaid body portions may comprise a pair of separately formed plates but preferably they are formed from a single plate which is shaped as required and then folded about a longitudinally extending fold line to provide the two body portions which are thus integrally connected together.

A burner as above-defined may be used singly or it may be connected to another, similar, burner (which may be of the same or different length) to form a tandem assembly in which the longitudinal axes of the two burners are co-incident, the inlet ends of the two venturis either being disposed adjacent to each other at the adjacent or inner ends of the hollow bodies of the two burners or, alternatively, being disposed at the outer ends of said hollow bodies.

The invention will now be more particularly described with reference to the accompanying drawings wherein Figure I is a plan view of a single plate, before it is folded, forming two portions which are adapted, when the plate is folded, to provide a hollow body which forms part of one example of a gas-fired burner constructed in accordance with the invention, Figure 2 is a side view partly in section, of the gas-fired burner which comprises the hollow body formed from the plate shown in Figure 1, together with an internal divider plate, Figures 3 and 4 are respectively sectional views taken along the lines 3-3 and 4-4 of Figure 2, Figure 5 is a part-sectional side view showing another example of a gas-fired burner in accordance with the invention, and Figure 6 is a part-sectional side view showing a further example of a gas-fired burner constructed in accordance with the invention.

Referring now to the drawings, the gasfired burners shown therein are intended for use in gas-fired domestic appliances such as in the grill chamber or the oven of a gas-fired cooker or in a gas-fired domestic heater.

In the example shown in Figures 1-4 there is provided a single metal plate 10 which forms two body portions 11 and 12 which are integrally connected together along a fold line 13, said body portions being shaped by pressing before they are folded about said line 13 to form a hollow elongate body that is closed at one end, namely end 14, as seen in Figure 2. There is also provided a divider plate 15 also formed as a metal pressing and which is assembled with the aforementioned body portions 11 and 12 so as to extend across the interior of said hollow body. The divider plate 15 forms, in conjunction with said body portion 11, a single venturi 16 having a fuel inlet end 17 which is disposed at the end of said body opposite to end 14, the venturi preferably being of generally circular or D-shaped configuration in cross-section.Furthermore said divider plate 15 forms, in conjunction with the other of said body portions 12, a single mixing chamber 18 and an aperture 19 is formed in the divider plate at that end thereof remote from said venturi inlet so that the venturi 16 will be in communication with the mixing chamber 18 through said aperture 19.

The hollow body is also provided along one side with a plurality of laterally directed flame ports 20 which are spaced apart along the length of the body. Conveniently said flame ports are formed by providing a series of channels of U-shaped configuration in cross-section along one edge of the body portion 12, each of said channels being closed across the top of its U-shaped section by a part of the divider plate so as to form a laterally directed port which extends at its inner end from said mixing chamber 18.

Associated with a gas-fired burner as above described would be an injector (not shown) which is arranged to inject a stream of gas into the inlet end 17 of the venturi.

The gas flowing from the injector will entrain air to form a gas/air mixture which will enter the venturi in the known manner.

Said mixture then flows to the opposite end of the venturi and then passes through the aforesaid aperture 19 in the divider plate 15 and thence into the mixing chamber 18. The gas/air mixture can then flow from said mixing chamber through the aforesaid flame ports 20 where it can be ignited in any convenient fashion to form a series of flames which will each extend in a direction transverse to the longitudinal axis of the burner.

A burner as above described can be used in a situation in which its longitudinal axis extends in a generally horizontal direction in which case the aforesaid mixing chamber 18 can either be lowermost or uppermost. In the former case of course the aforesaid flames will issue from the lower portion of one side of the burner whereas in the latter case they will issue from the upper portion of one side of the burner.

Furthermore a burner as above described can either be used singly (as shown in Figures 1-4) or in tandem assembly (as shown in Figure 5 or in Figure 6) in which it is integrally connected with a similar burner which may be of the same or different length. With such a tandem arrangement the two burners thus provided will be arranged so that their longitudinal axes are co-incident and the inlet ends 17 of the two venturis 16 may be arranged so that they are adjacent to each other at the adjacent or inner ends of the burner, as is seen in Figure 6. A duplex form of gas control tap may then be provided for said injectors so that either one or both burners can be supplied with gas depending upon the heat output required.In an alternative tandem arrangement which is shown in Figure 5 the two burners are integrally connected together in a disposition in which the inlet ends 17 of the venturis 16 are remote from each other so as to be disposed at the outer ends of the burners, and each venturi would then have an associated injector.

In the above-described constructions, the two body portions of the or each burner are integrally connected together, being formed from a single metal plate. In an alternative arrangement (not shown), said two body portions are formed from two separate plates which are shaped as required and then connected together with a divider plate to form an assembly which is otherwise generally similar to the construction of the or each burner described above.

WHAT WE CLAIM IS: 1. A gas-fired burner which is of generally elongate configuration and which comprises a pair of body portions which are so shaped and connected together to form a hollow elongate body, there being also provided a divider plate which extends across the interior of said body so as to form, in conjunction with one of said body portions, a single venturi having a fuel inlet end which is disposed at one end of the body, and, in conjunction with the other of said body portions, a single mixing chamber which communicates with said venturi at that end thereof opposite to said inlet end, said mixing chamber being provided, along the length of said hollow body, with a plurality of laterally directed flame ports.

2. A gas-fired burner as claimed in Claim 1 wherein said pair of body portions are formed from a single plate which is shaped and then folded about a longitudinally extending fold line to provide the two body portions which are thus integrally connected together.

3. A gas-fired burner as claimed in Claim 1 wherein said pair of body portions comprise a pair of separately formed plates.

4. A gas-fired burner as claimed in any one of the preceding claims wherein the burner is connected to another, similar, burner to form a tandem assembly in which the longitudinal axes of the two burners are co-incident.

5. A gas-fired burner as claimed in Claim 4 wherein the fuel inlet ends of the

**WARNING** end of DESC field may overlap start of CLMS **.

Claims

**WARNING** start of CLMS field may overlap end of DESC **. divider plate 15 also formed as a metal pressing and which is assembled with the aforementioned body portions 11 and 12 so as to extend across the interior of said hollow body. The divider plate 15 forms, in conjunction with said body portion 11, a single venturi 16 having a fuel inlet end 17 which is disposed at the end of said body opposite to end 14, the venturi preferably being of generally circular or D-shaped configuration in cross-section. Furthermore said divider plate 15 forms, in conjunction with the other of said body portions 12, a single mixing chamber 18 and an aperture 19 is formed in the divider plate at that end thereof remote from said venturi inlet so that the venturi 16 will be in communication with the mixing chamber 18 through said aperture 19. The hollow body is also provided along one side with a plurality of laterally directed flame ports 20 which are spaced apart along the length of the body. Conveniently said flame ports are formed by providing a series of channels of U-shaped configuration in cross-section along one edge of the body portion 12, each of said channels being closed across the top of its U-shaped section by a part of the divider plate so as to form a laterally directed port which extends at its inner end from said mixing chamber 18. Associated with a gas-fired burner as above described would be an injector (not shown) which is arranged to inject a stream of gas into the inlet end 17 of the venturi. The gas flowing from the injector will entrain air to form a gas/air mixture which will enter the venturi in the known manner. Said mixture then flows to the opposite end of the venturi and then passes through the aforesaid aperture 19 in the divider plate 15 and thence into the mixing chamber 18. The gas/air mixture can then flow from said mixing chamber through the aforesaid flame ports 20 where it can be ignited in any convenient fashion to form a series of flames which will each extend in a direction transverse to the longitudinal axis of the burner. A burner as above described can be used in a situation in which its longitudinal axis extends in a generally horizontal direction in which case the aforesaid mixing chamber 18 can either be lowermost or uppermost. In the former case of course the aforesaid flames will issue from the lower portion of one side of the burner whereas in the latter case they will issue from the upper portion of one side of the burner. Furthermore a burner as above described can either be used singly (as shown in Figures 1-4) or in tandem assembly (as shown in Figure 5 or in Figure 6) in which it is integrally connected with a similar burner which may be of the same or different length. With such a tandem arrangement the two burners thus provided will be arranged so that their longitudinal axes are co-incident and the inlet ends 17 of the two venturis 16 may be arranged so that they are adjacent to each other at the adjacent or inner ends of the burner, as is seen in Figure 6. A duplex form of gas control tap may then be provided for said injectors so that either one or both burners can be supplied with gas depending upon the heat output required.In an alternative tandem arrangement which is shown in Figure 5 the two burners are integrally connected together in a disposition in which the inlet ends 17 of the venturis 16 are remote from each other so as to be disposed at the outer ends of the burners, and each venturi would then have an associated injector. In the above-described constructions, the two body portions of the or each burner are integrally connected together, being formed from a single metal plate. In an alternative arrangement (not shown), said two body portions are formed from two separate plates which are shaped as required and then connected together with a divider plate to form an assembly which is otherwise generally similar to the construction of the or each burner described above. WHAT WE CLAIM IS:

1. A gas-fired burner which is of generally elongate configuration and which comprises a pair of body portions which are so shaped and connected together to form a hollow elongate body, there being also provided a divider plate which extends across the interior of said body so as to form, in conjunction with one of said body portions, a single venturi having a fuel inlet end which is disposed at one end of the body, and, in conjunction with the other of said body portions, a single mixing chamber which communicates with said venturi at that end thereof opposite to said inlet end, said mixing chamber being provided, along the length of said hollow body, with a plurality of laterally directed flame ports.

5. A gas-fired burner as claimed in Claim 4 wherein the fuel inlet ends of the

venturis are disposed adjacent to each other at the adjacent ends of the hollow bodies of the two burners.

6. A gas-fired burner as claimed in Claim 4 wherein the fuel inlet ends of the venturis are disposed at the outer ends of the hollow bodies of the two burners.

7. A gas-fired burner substantially as hereinbefore described with reference to and as shown in Figures 1-4, or Figure 5, or Figure 6 of the accompanying drawings.