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Patent Searching and Data


Title:
A BURNER
Document Type and Number:
WIPO Patent Application WO/2007/063270
Kind Code:
A1
Abstract:
A burner comprising a mesh (3) at which combustion occurs and an ignition system comprising a piezo- electric spark generator (1) having a striker (2) , a first electrode (6) connected to the striker and terminating adjacent to the mesh and a second electrode (7) which is grounded and terminates adjacent to the mesh. When the striker is activated, a current travels from the first electrode to the mesh creating a first spark (10) and from the mesh to the second electrode creating a second spark (11) .

Inventors:
HAMMOND, Geoffrey, Robert (574 James Reckitt Avenue, Hull HU8 0LG, GB)
Application Number:
GB2006/004057
Publication Date:
June 07, 2007
Filing Date:
October 31, 2006
Export Citation:
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Assignee:
RECKITT BENCKISER (UK) LIMITED (103-105 Bath Road, Slough, Berkshire SL1 3UH, GB)
HAMMOND, Geoffrey, Robert (574 James Reckitt Avenue, Hull HU8 0LG, GB)
International Classes:
F23Q3/00
Foreign References:
US5960783A
JPH08200672A
Attorney, Agent or Firm:
BOWERS, Craig, M. et al. (Legal Department, Patents Group Reckitt Benckiser pl, Dansom Lane Hull HU8 7DS, GB)
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Claims:
CLAIMS : -

1.. A piezo-electric burner comprising an electrically conductive element at which combustion occurs and an ignition system comprising a piezo-electric spark generator having a^ striker, a first electrode connected to the striker and terminating adjacent to the electrically conductive element' and a second electrode which is grounded at the striker and terminates adjacent to, the electrically conductive element, ' whereby when the striker is activated, a current travels from the first electrode to the electrically conductive element creating a first spark and from the eleccrzcaxxy conductive element to the second electrode creating a second spark.

2.. A burner according to claim 1, wherein the electrically conductive element is a mesh.

Description:

A BURNER

The present invention relates to a burner. More particularly, the invention relates to an improvement in the ignition of a burner using a piezo-electric spark generator.

In a conventional piezo-electric ignition system for a burner,, an electrode is connected to the striker of a piezoelectric spark generator and the body of the burner is grounded. ' When activated, a spark is generated between the electrode and an electrically conductive part of the burner. However, the position of the. spark is difficult to control as it tends to follow the shortest path to ground and this is usually towar.ds the edge of the electri-cally conductive part .

According to the present invention, . there is provided a piezo-electric burner comprising an electrically conductive element at which combustion occurs and an ignition system comprising a piezo-electric spark generator having a striker, a first electrode connected to the striker and terminating 1 adjacent to the electrically conductive element and a second electrode which is grounded at the striker and . terminates adjacent to the electrically conductive, element, whereby when the striker. is activated, a current travels from the first . electrode to the electrically conductive element creating a first spark and from the ' electrically conductive element to the second electrode creating a second spark.

From the tip of the first electrode, the shortest path

through the second electrode . The spark therefore tends to travel directly to the electrically conductive element from the first electrode and directly, from the electrically conductive element to the second electrode. The position of the sparks can therefore readily .be controlled as they can be reliably positioned directly in the gas path. Further, the present invention generates two sparks which provide two ignition sites thereby further enhancing the reliability of the ignition.

In its simplest form, the electrically conductive element may be a wire. However, it may take any form. ' For example, for a catalytic heater it is preferably a mesh.

The principle of the present invention can be applied to any mesh burners, such as those used, for example ' , in camping stores, cigarette lighters, catalytic heaters, pest active emanators, fragrance emanation devices, bunsen burners, all types of gas burners using butane, propane, (or indeed all alkane gases) .

An example of a burner in accordance with the present invention will now be described with reference to the accompanying drawing which is a schematic diagram of the burner.

The invention uses a conventional piezo-electric spark generator 1 which is well-known in the art, for example, in cigarette lighters. The spark generator 1 comprises a striker 2 which is manually operable to generate a spark.

The burner comprises a mesh 3 which is preferably a catalytic mesh to which gas is supplied along gas supply duct 4 for ignition at the mesh. A wire.5 connects the striker 2 to a first electrode 6 which terminates close to the mesh 3 in the same way as in a conventional spark ignition system. However, in a conventional system, the burner itself is then ,grounded to provide the conductive path for spark generation. , In the present case, instead of the burner being -grounded, a second electrode 7 is provided. This is connected to ground 8 on the striker 2 via a wire 9. The second electrode terminates in close proximity to the mesh 3 while it is spaced a sufficient distance from the electrode 6 that the shortest path to the ground from the first electrode 6 to the second electrode 7 is via the mesh 3 rather than being directly from one electrode to the other.

When the striker 2 is depressed, a current is produced in wire 5 which travels along the electrode 6 directly down onto mesh 3 generating a first spark 10. It then travels through the "mesh 3 to a location beneath the second electrode .7 and directly to, the second electrode 7 generating a second spark 11.

It will therefore be appreciated that two sparks are generated directly in the path of the gas. flow.