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
  • F23D14/46—Details
  • F23D14/62—Mixing devices; Mixing tubes
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
  • F23L13/00—Construction of valves or dampers for controlling air supply or draught
  • F23L13/02—Construction of valves or dampers for controlling air supply or draught pivoted about a single axis but having not other movement
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23D—BURNERS
  • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
  • F23D2900/14—Special features of gas burners
  • F23D2900/14021—Premixing burners with swirling or vortices creating means for fuel or air

Definitions

• the present invention relates to a modular gas-air mixer which is used to transfer gas and air to the combustion chamber upon mixing thereof.
• the combustion products (gas and air) are mixed by the fan and gas-air mixer and sent to the combustion chamber. Since the gas-air mixture formed in this way is supplied homogeneously, all or almost all of the gas burns.
• the pre-mixing fan used in gas burning devices air and gas are sucked and the gas-air mixture is blown into the burner.
• Electronically or pneumatically adjustable gas valves are used to adjust the mixing ratio.
• the gas valve provides gas flow with the effect of negative pressure and the gas is directly mixed into the sucked air.
• gas-air mixers are comprised of a chamber, an air passage channel for the passage of air through the chamber, a gas inlet opening into the chamber and a plurality of holes located on the air passage channel. While the air passes through the air channel, the gas enters the chamber. Gas mixes with air by passing through the holes on the air passage channel. Depending on the flow of the sucked air, the gas mixes at an appropriate rate and the air + gas mixture required for combustion is formed.
• the negative pressure (the vacuum effect) is obtained by means of a venturi arranged on the suction side of the fan, wherein a locally higher flow velocity and negative pressure are obtained by locally reducing the flow cross-section (Bernoulli-equation).
• the air passage channel is comprised of two conical cylindrical parts which are separate from each other and are joined afterwards, and the holes used for gas passage are located at the joints of the said two parts.
• different gas-air mixer configurations must be used in order to make modulations of boilers with different energy levels.
• the gas-air mixer that should be used for a 24 kW boiler and the gas-air mixer that should be used for a 45 kW boiler are different from each other. Therefore, it is required to use a different mixer for boilers with different capacities. This situation causes the production of gas-air mixers to be more complex. Since the gas-air mixers used in the current technique do not comprise common parts, they need molds different from each other.
• the objective of the present invention is to provide a gas-air mixer which is modular for gas burning devices with different energy levels in which they are to be used and whose capacity can be changed without changing its interior part.
• the objective of the present invention is to provide a gas-air mixer, which enables to increase the modulation rate of the product by keeping the minimum fan speed of the device at a range in which the fan of the device can operate safely, and in which the amount of the incoming air can be changed.
• the objective of the present invention is to provide a gas-air mixer which allows the air passage to be more turbulent and therefore to increase the amount of gas in the mixture without increasing the pressure loss of the product.
• the objective of the present invention is to provide a gas-air mixer which has low pressure loss.
• the objective of the invention is to increase the modulation level with a modular structure while keeping the minimum fan speed within the safe range in which the fan can operate without increasing the maximum fan speed, and thereby preventing the high noise level caused by the high maximum fan speed.
• Figure 1 is the front perspective view of the gas-air mixer of the present invention with turbulator.
• Figure 2 is the front cross-section view of the gas-air mixer of the present invention without valve system or turbulator.
• Figure 3 is the front cross-section view of the gas-air mixer of the present invention with turbulator.
• Figure 4 is the side cross-section view of the gas-air mixer of the present invention.
• Figure 5 is the front perspective view of the valve system in the gas-air mixer of the present invention.
• Figure 6 is the rear perspective view of the valve system in the gas-air mixer of the present invention.
• Figure 7 is the front perspective view of the turbulator in the gas-air mixer of the present invention.
• Figure 8 is the rear perspective view of the turbulator in the gas-air mixer of the present invention.
• a mixer (1) which is used to transfer gas and air into the combustion chamber in gas burning devices such as boilers upon mixing thereof, comprises at least one outer body (2) which has at least one gas inlet (21) for gas transfer to its inner part and has a volume inside, at least one inner body (3) which is placed inside the outer body (2), comprises an inlet for air passage and an outlet for air-gas mixture, and at least one opening (33) for gas passage therein from the outer body (2), at least one turbulator (4) and/or valve system (5); which is used for allowing to increase the modulation rate of the device and to increase the minimum fan speed of the device by increasing the maximum fan speed, at which the device can operate, by a minimum amount; and which is placed on the air inlet of the inner body (3) and used for making the air more turbulent or adjusting the air passage amount.
• the mixer (1) of the present invention is comprised of an outer body (2) into which gas is transferred through a gas inlet (21), an inner body (3) in the form of a cylinder which is placed inside the outer body (2) and comprises air inlet-outlet, openings (33) which are provided on the inner body (3), and the turbulator (4) or valve system (5) which is located on the air inlet of the inner body (3).
• the outer body (2) located in the mixer (1) is preferably in the form of a cylinder that is open at both ends and there is a gas inlet (21) in the form of a hole, preferably on the middle part of the outer body (2).
• the inner body (3) located in the mixer (1) comprises parts, the section of which narrows and expands, and it has an opening (33) in the form of a hole preferably where the section is narrow.
• the turbulator (4) and/or the valve system (5) makes the air which will enter into the inner body (3) more turbulent without changing the fan (which transfers the air to the inner body (3)) or by increasing its speed at a minimum level, and in this way, it enables to increase the amount of gas in the mixture without increasing the pressure loss of the product. Therefore, for gas burning devices having different energy levels (24 kW, 45 kW boiler, etc.), a single mixer (1) can be used without changing the inner body (3) and outer body (2), only by changing the valve system (5) and/or the turbulator (4). Thus, it is possible to provide the air-gas mixture of the boilers with different energy needs by changing only the turbulator (4) and/or the valve system (5) during production. In addition, this minimizes labor and mold costs, and also reduces mass production costs. Since different modulation rates can be provided easily with the modular structure, it also reduces inventory costs.
• the turbulator (4) and/or the valve system (5) are changed according to the boiler energy level after mounting of the outer body (2) and the inner body (3) in the production.
• the air first comes onto the turbulator (4) and/or the valve system (5) on the inner body (3), and the air moves in the inner body (3) upon becoming turbulent in the turbulator (4) and/or the valve system (5) and/or in a desired amount of passage.
• the gas is filled into the outer body (2) through the gas inlet (21) on the outer body (2) and the gas flows into the inner body (3) through the opening (33) according to the Bemoulli- equation (negative pressure state with high flow velocity due to narrowing section in the inner body (3)), and mixes with the air.
• the inner body (3) is comprised of air inlet channel (31) and outlet channel (32), which are a single piece, and openings (33) located at the junction of the air inlet channel (31) and the air outlet channel (32).
• the air inlet channel (31) is comprised of the flat mounting surface and the narrowing section, and the outlet channel (32) section has a conical structure with an expanding section.
• the turbulator (4) and/or the valve system (5) are placed on the flat mounting surface on the air inlet channel (31).
• the air before the air reaches the narrowing section structure, it is regulated by the turbulator (4) and/or the valve system (5), it becomes a turbulent flow and/or the amount of air passage is determined and the noise and poor quality combustion that may occur in different gases is prevented.
• the regulated flow prevents poor quality combustion caused by the gas quality.
• the air inlet channel (31) has a mounting surface (311) extending outward from the outer body (2) and when the inner body (3) is placed inside the outer body (2), the mounting surface (311) remains outside the outer body length. In this way, the turbulator (4) and/or the valve system (5) is fixed on the inner body (3) mounting surface (311) outside the outer body (2). In this way, the turbulator (4) and/or the valve system (5) can be easily detached from and attached to the inner body (3) and outer body (2).
• the minimum load and maximum load ratio which the mixer (Venturi) (1) can provide in gas burning devices is called the modulation ratio. Since the mixer (venturi) (1) provides the gas mixture, it enables the maximum possible gas ratio to be determined.
• the device has a modular venturi structure so that it can operate in different modulation ranges in different models. The said modulation range is adjusted with the turbulator (4) and/or the valve system (5).
• the turbulator (4) comprises: at least one first ring member (41) in order to be fixed to the air inlet part of the inner body (3), a center part (42) which is provided preferably on the middle part of the first ring member (41) and a plurality of fixed blades (43) which are positioned between the center part (42) and the first ring member (41).
• a turbulator (4) which is used by being fixed to a mixer (1) wherein gas and air are mixed in the combustion chamber in gas burning devices such as boilers and the like, and which is used to transfer the air with turbulence, is comprised of at least one first ring member (41) in order to be fixed to the air inlet part of a mixer (1), a center part (42) which is provided preferably on the middle part of the first ring member (41) and a plurality of fixed blades (43) which are positioned between the center part (42) and the first ring member (41).
• the said fixed blades (43) of the turbulator (4) are fixed at an angle according to the air intake direction.
• the turbulator (4) is fixed/positioned on the air inlet side of the inner body (3) via the first ring element (41), and the blades (43) are positioned in the air intake direction so that the air passage becomes more turbulent and thus the gas ratio in the mixture is enabled to be at the desired ideal amount without increasing the pressure loss of the product.
• the turbulator (4) comprises a first mounting elevation which is in the form of a circular protrusion for attaching the first ring member (41) to the mounting surface (311).
• the said first mounting elevation is positioned on the outer wall of the inner body (3) and thus enables the turbulator (4) to be fixed.
• first lug (45) or second lug (55) part which is in the form of a protrusion or ridge on the first mounting elevation or the second mounting elevation (54), and which comprises a hole thereon matching a connection protrusion (movable/push-on) located on the outer wall of the inner body (3).
• connection protrusion movable/push-on
• the turbulator enables the air intake amount to be determined by narrowing the air inlet in cross-section.
• the turbulator makes the intake air more turbulent.
• the valve system (5) comprises a second ring member (51) in order to be fixed to the air inlet part of the inner body (3), at least one rotary pin (52) which is fixed on the second ring member (51), at least one flap (53) which is fixed to the rotary pin (52) and is movable with the rotary pin (52).
• a valve system (5) which is used by being fixed to a mixer (1) wherein gas and air are mixed in the combustion chamber in gas burning devices such as boilers and the like, and which is used in order to increase the modulation rate (decreasing the minimum capacity) and to transfer the air with turbulence, comprises a second ring member (51) in order to be fixed to the air inlet part of a mixer (1), at least one rotary pin (52) which is fixed on the second ring member (51), at least one flap (53) which is fixed to the rotary pin (52) and is movable with the rotary pin (52).
• a valve structure is formed with the pin (52) and the flap (53) provided in the valve system (5) and the opening ratio of the flap (53) enables the modulation rate (capacity) of the mixer (1) to be determined.
• there is at least one head which is used for rotating the pin (52) and is located in the part of the pin (52) outside the inner body (3).
• the pin (52) is fixed in a rotatable manner by fitting into the opposite holes on the inner body (3).
• the amount of turbulence in the air inlet is increased and it is enabled to increase the minimum fan speed of the device by increasing the maximum fan speed, at which the device can operate, by a minimum level.
• the turbulator (4) and/or the valve system (5) (the turbulator part) allows the modulation rate of the device which is 1:4 to be 1:6 or 1:8.
• the sealing member (6) which prevents the gas entering the inner part of the outer body (2) from leaking (exiting) between the inner wall of the outer body (2) and the upper surface of the inner body (3).
• the sealing member (6) is a gasket or an O-ring.
• a fixing assembly used in fixing the inner body (3) on the outer body (2) comprises at least one lock pin in the form of a protrusion which is provided on the outer surface of the inner body (3), at least one lock channel (22) which is provided at the end part of the outer body (2) in the form of an inclined channel recess on the outer body (2) and is adapted for the lock pin to be inserted therein.
• the fixing assembly is used to fix the inner body (3) on the outer body (2) and comprises a pin-channel structure (bayonet).
• a pin-channel structure bayonet
• the sealing members (6) provide sealing between the bodies.
• a mixer (1) which is used to transfer gas and air into the combustion chamber in gas burning devices such as boilers upon mixing thereof, comprises at least one outer body (2) which has at least one gas inlet (21) for gas transfer to its inner part and has a volume inside, at least one inner body (3) which is placed inside the outer body (2), comprises an inlet for air passage and an outlet for air-gas mixture, and at least one opening (33) for gas passage therein from the outer body (2), at least one turbulator (4) which is used for making the air more turbulent and which is comprised of

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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 (2)

Publications (2)

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ID=75362655

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• 2021
  • 2021-01-21 TR TR2021/00913A patent/TR202100913A2/tr unknown
  • 2021-02-19 WO PCT/TR2021/050155 patent/WO2022159051A1/en not_active Ceased
  • 2021-02-19 EP EP21716244.5A patent/EP4100680B1/de active Active

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