Wood pellet boiler
AssigneeWarmflow Engineering Company Limited
InventorsGerard Mackle, Jason Cassells
Life of this patent
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Abstract
The present application relates to improvements to granular fuel burning boilers such as wood pellet boilers and burners therefor. In particular, there is disclosed a wood pellet boiler having a combustion chamber, wherein an access door for said combustion chamber comprises a wood pellet burner assembly mounted on the interior side thereof. In this way, the wood pellet burner assembly is movable from and into the combustion chamber of the wood pellet boiler when the access door is opened and closed, respectively.
Claims10
An access door for a combustion chamber of a wood pellet boiler, the access door comprises a wood pellet burner assembly, characterised in that the wood pellet burner assembly comprises:
- a housing having a surface adapted to support a combustion pot of the wood pellet burner;
- a grate comprising a plurality of spaced apart bars;
- a cleaning mechanism to dislodge residual ash and clinker from the grate, the cleaning mechanism comprising one or more movable members adapted to move in upwards and downwards reciprocating motion between the bars of the grate,
- wherein each movable member comprises a substantially planar blade member having an upper in use end that projects above the upper surface of the wood pellet burner housing,
- wherein motion of each blade member is affected by a rotatable rod that extends through and engages in a cam-action with a lower in use end of each blade member,
- the rotatable rod being rotated in use by a motor provided within the access door;
- and
- wherein the access door comprises an aperture for air to be drawn by a circulation fan of the wood pellet boiler through the access door, the aperture being in fluid communication with the wood pellet burner assembly, whereby air circulated through the aperture provides combustion air for the combustion pot, cooling air for the housing of the wood pellet burner assembly, and cooling air for the cleaning mechanism and its motor.
A wood pellet boiler comprising an access door for a combustion chamber, the access door comprising:
- a wood pellet burner assembly, characterised in that the wood pellet burner assembly comprises:
- a housing having a surface adapted to support a combustion pot of the wood pellet burner;
- a grate comprising a plurality of spaced apart bars;
- a cleaning mechanism to dislodge residual ash and clinker from the grate, the cleaning mechanism comprising one or more movable members adapted to move in upwards and downwards reciprocating motion between the bars of the grate, wherein each movable member comprises a substantially planar blade member having an upper in use end that projects above the upper surface of the wood pellet burner housing, wherein motion of each blade member is affected by a rotatable rod that extends through and engages in a cam-action with a lower in use end of each blade member, the rotatable rod being rotated in use by a motor provided within the access door;
- and wherein the access door comprises an aperture for air to be drawn by a circulation fan of the wood pellet boiler through the access door, the aperture being in fluid communication with the wood pellet burner assembly, whereby air circulated through the aperture provides combustion air for the combustion pot, cooling air for the housing of the wood pellet burner assembly, and cooling air for the cleaning mechanism and its motor.
Dependencies are inferred from the claim text.