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A gas burner apparatus with pre-mixing

A technology of gas burner and mixing device, which is applied in the directions of gas fuel burner, burner, combustion method, etc., can solve problems such as cost increase

Inactive Publication Date: 2011-10-05
СІТ С П А
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this leads to increased costs as it requires the production and control of additional burner components

Method used

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  • A gas burner apparatus with pre-mixing
  • A gas burner apparatus with pre-mixing
  • A gas burner apparatus with pre-mixing

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Experimental program
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Embodiment Construction

[0013] Referring to the drawings shown, a gas combustion device of the premixed type constructed in accordance with the present invention is generally designated by the reference numeral 1 .

[0014] The burner comprises a combustion head 2, preferably of cap-like configuration, the base of which is advantageously fixed to a cover 3 constituting the closure of a combustion chamber (not shown) associated with the burner.

[0015] The fan unit 4 , whose centrifugal type impeller 5 is coaxial with the combustion head, is also rotatably supported on the cover. The axis of rotation of the impeller actuated by the electric motor 6 is marked with the reference X.

[0016] Behind the combustion head 2 and on the inside with respect to the combustion head 2 there is a distribution piece which is designated with the reference number 7 and which is also generally cap-shaped and provided with through-holes for distributing the air / gas mixture to the combustion head .

[0017] Formed in ...

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PUM

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Abstract

A gas burner apparatus with pre-mixing comprises mixing means for mixing an air / gas mixture which is intended to be conveyed to the intake section of a fan unit (4), whose delivery is conveyed to a combustion head (2) of the burner, the mixing means comprising a plurality of ducts (12), each of which has a region in the form of a Venturi duct with contiguous portions (16a, 16b) which are convergent / divergent, with respect to the direction of flow, and with a restricted duct cross-section (16c) defined between the convergent portion and the divergent portion, there being conveyed in each convergent portion (16a) an air flow which is intended to be mixed with a gas flow which is introduced into the duct at the restricted cross-section (16c), the air / gas mixture being conveyed through the divergent portion (16b) of the duct to the intake section (10) of the fan unit (4).; Each duct (12) of the plurality is defined by the engagement of at least a first and a second mutually separate burner region (A,B), along a mutual engagement profile, there being carried on each of the burner regions (A,B) corresponding, separate portions of each of the ducts (12), at least a first fluid-tight sealing element (20) being provided between the burner regions (A,B) along the engagement profile in order to prevent gas and / or air from being drawn in with respect to the ducts (12). The at least first sealing element (20) is interposed between the burner regions (A,B) at the restricted cross-section (16c) of each of the Venturi ducts of the plurality of ducts (12); the at least first sealing element (20) has through-holes (21) which define the restricted cross-section of the corresponding Venturi duct in at least some of the plurality of ducts (12), as a result of the engagement of the burner regions (A,B) along the engagement profile and is interchangeable with at least a second sealing element (20', 20'') which has corresponding through-holes (21', 21'').

Description

technical field [0001] The invention relates to a gas burner arrangement of the premix type having the features set forth in the preamble of claim 1 . technical background [0002] In a particular technical field, it is known to construct gas burners of the premixed type, for example, for condensing boilers, the combustion head of which is adapted to be received in a combustion chamber to which an air / gas mixture is supplied by delivery of a fan unit. An example of such a burner arrangement is known from Italian patent application PD2007A000413, in which a burner is described which is connected to the cover of the combustion chamber or another similar closure and is coaxial inside the burner Installed with fan unit and cap-shaped combustion head. In this application, the air / gas mixture combusted at the surface of the combustion head of the burner is in the form of a plurality of mixing tubes which open towards the outside of the burner to draw in air and which, once mixed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23D14/62F23D14/36
CPCF23D14/36F23D14/62
Inventor L·巴度卡S·卡罗瑞D·普扎托
Owner СІТ С П А