Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23D—BURNERS
  • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
  • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
  • F23C3/00—Combustion apparatus characterised by the shape of the combustion chamber
  • F23C3/002—Combustion apparatus characterised by the shape of the combustion chamber the chamber having an elongated tubular form, e.g. for a radiant tube
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23D—BURNERS
  • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
  • F23D14/46—Details
  • F23D14/70—Baffles or like flow-disturbing devices
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23D—BURNERS
  • F23D2203/00—Gaseous fuel burners
  • F23D2203/10—Flame diffusing means
  • F23D2203/102—Flame diffusing means using perforated plates

Definitions

• Gas burners 1 for example tubular or cylindrical, of the type comprising:
• Condensate leakage can occur with certain air-gas mixture manifold configurations and also depends, for example, on the position of the flame detection sensor, as well as on the geometry of the burner support wall.
• the leakage of condensate can cause malfunctions or damage to the application (for example to the boiler) to which the burner is connected.
• the inlet opening 5 of the support wall 2 of the burner 1 defines, due to its wide circular geometry, a hydraulic head 11 (in other words: a hydraulic overflow level with respect to a lower point of the combustion chamber) undesirably low (in some burner examples, the overflow level, measured from a lower point of the diffuser wall 6, is less than 18.7 mm), which is why the condensate accumulated under abnormal operating conditions can easily overflow and escape from the burner 1 and from the combustion chamber through the inlet opening 5 in the opposite direction to the flow of the gas and air mixture.
• a hydraulic head 11 in other words: a hydraulic overflow level with respect to a lower point of the combustion chamber
• the overflow level measured from a lower point of the diffuser wall 6, is less than 18.7 mm
• the purpose of the present invention is therefore to make available a gas burner of the type described above or similar, having characteristics such as to prevent or reduce as much as possible the risk of condensate leakage observed in the prior art.
• a gas burner for a boiler and/or for industrial applications for example, a burner for a boiler with a nominal power in the range from 18 kW to 36 kW, for example from 18 kW to 28 kW, e.g. 24kW, with maximum power Qmax in the range from 18 kW to 28kW, for example 24.7 kW, for domestic water heating and with minimum power Qmin in the range from 4kW to 6kW, for example 4.9 kW, for the domestic heating circuit, includes:
• This geometric configuration allows the air and gas mixture to be fed into the burner (as is already the case in the prior art) and, at the same time, provides a higher barrier against the overflow of condensate from inside the burner - and from the combustion chamber - to the outside.
• a burner 1 comprises:
• This geometric configuration allows the air and gas mixture 12 to be fed into the interior 13 of the burner 1 (as already occurs in the prior art) and, at the same time, provides a higher barrier against the overflow of condensate from the inside of the burner - and from the combustion chamber - towards the outside.
• the inlet opening 5 in the main position of use, is delimited above and laterally by the upper edge 17, and below by the lower edge 16.
• the lower edge 16 is preferably straight and (always in the main position of use) horizontal so as to be parallel to a level of possible condensate accumulated in the burner 1.
• the upper edge 17 has an arched shape, preferably an arc of a circle, even more preferably an arc of a circle concentric with respect to the diffuser wall 6. This allows for a maximization of the passage area of the inlet opening 5 at the same height as the lower edge 16.
• the lower edge 16, and therefore the entire inlet opening 5 is formed above a lower third of the entire diffuser height 20 of the diffuser wall 6 at its first end 7 (in the sense that the support wall 2 is impermeable from the lower end 16" for/up to at least one third of the diffuser height 20), preferably above half of the entire diffuser height 20 of the diffuser wall 6 at its first end 7 (in the sense that the support wall 2 is impermeable from the lower end 16" for/up to at least half of the diffuser height 20), even more advantageously the lower edge 16, and therefore the entire inlet opening 5 (always in the main position of use), is formed above 55% of the diffuser height 20 ( Figures 5 . 4 , 6 . 4 ).
• the support wall 2 is made of sheet metal, e.g. steel, and preferably in the shape of a circular disk, possibly with one or more circular steps 21 that engage the diffuser wall 6 and/or the distributor wall 18.
• the support wall 2 forms one or more shape references 22, for example recesses, which facilitate a correct positioning and assembly of the burner 1 in the main use position and, preferably, prevent (due to space violation), an assembly of the burner 1 in unplanned and rotated positions with respect to the main use position around the longitudinal axis 15.
• the diffuser wall 6 is made of sheet metal, e.g. steel, and is preferably circular cylindrical.
• the perforation 10 comprises one or more equal or different perforation patterns, wherein each of the perforation patterns a repetitive hole pattern in the perimeter direction, preferably along at least 80% or 90% of the perimeter or along the entire perimeter of the diffuser wall 6.
• each of the perforation patterns forms a repetitive hole pattern also in the longitudinal direction of the diffuser wall 6.
• the diffuser wall 6 forms a proximal end portion 6' without perforation to which the support wall 2 is connected, as well as a distal end portion 6" without perforation to which the closing wall 9 is connected.
• the burner 1 may be without an additional distribution wall upstream (referring to the flow direction of the fuel gas 12) of the diffuser wall 6 ( Figure 6 . 2 , 6 . 3 ).
• the burner 1 may also comprise a tubular distributor wall 18, preferably cylindrical or circular cylindrical, arranged in the internal space 13 and connected with the support wall 2 in flow communication with the inlet opening 5 and closed on the opposite side of the support wall 2, for example by means of the same closing wall 9.
• a tubular distributor wall 18 preferably cylindrical or circular cylindrical, arranged in the internal space 13 and connected with the support wall 2 in flow communication with the inlet opening 5 and closed on the opposite side of the support wall 2, for example by means of the same closing wall 9.
• the distributor wall 18 forms a further perforation 19 for the distribution of the gas mixture 12 from an inner side of the distributor wall 18 towards the diffuser wall 6.
• the distributor wall 18 is made of sheet metal, e.g. steel, and is preferably circular cylindrical.

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Gas Burners (AREA)

Applications Claiming Priority (1)

Publications (1)

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ID=92926363

Family Applications (1)

Country Status (2)

Citations (4)

• 2025
  • 2025-07-08 EP EP25188008.4A patent/EP4678978A1/de active Pending
  • 2025-07-11 CN CN202510959414.5A patent/CN121322949A/zh active Pending

Patent Citations (4)

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