Background of the Invention
[0001] The present invention relates to an air-gas mixture burning appliance that comprises
an air-gas mixing unit with a plurality of air-gas mixers for mixing of air and gas
to form a combustible air-gas mixture, an air supply that is connected to the air-gas
mixing unit and comprises a common air way for supply of air to the plurality of air-gas
mixers, and a gas governor that is adapted to control supply of gas to the plurality
of air-gas mixers dependant on an air pressure signal that is indicative of a static
air pressure in the common air way. Furthermore, the present invention relates to
a Venturi plate that forms a manifold which interconnects inlet sides of a plurality
of Venturi-type mixing nozzles.
[0002] From the state of the art an air-gas mixture burning appliance with an air-gas mixing
unit, a burning unit, and a gas governor is known, wherein e.g. hydrogen may be used
as gas and mixed with air to form a combustible air-gas mixture. Such an air-gas mixture
burning appliance usually performs "just in time" mixing of air and gas directly before
the burning unit to minimise a respective volume of combustible air-gas mixture available
in the event of a flashback. Thus, a predefined point of mixing for the air and gas
may be located near an associated combustion space directly downstream of the burning
unit.
[0003] In such an air-gas mixture burning appliance, the gas governor may be used to accomplish
a suitable pneumatic air-gas ratio control by regulating gas supply pressure in relation
to an aspiration air pressure signal, i.e. by controlling supply of gas to the air-gas
mixing unit. In order to provide stable control of the gas supply pressure, the gas
governor must, nevertheless, be provided with a stable measurement of air pressure,
i.e. with a stable pressure signal, which indicates a respective unaccelerated static
pressure of the air in the air-gas mixing unit.
[0004] From the state of the art the measurement of air pressure is well-known for air-gas
mixture burning appliances having an air-gas mixing unit that is respectively only
provided with a single air-gas mixer. In this case, if a given single air-gas mixer
is e.g. embodied as a Venturi-type mixing nozzle, a stable measurement of a suitable
air pressure signal that indicates the unaccelerated static pressure of the air may
be performed by sampling this pressure via an annular slot of the Venturi-type mixing
nozzle that encircles an air inlet of the Venturi-type mixing nozzle and that faces
into a respective air flow.
[0005] Document
EP3268668A2 shows an air-gas mixture burning appliance with an air-gas mixing unit and a gas
governor controlling the fuel gas supply dependant on an air pressure signal indicative
of a static air pressure in a common air way. An air-gas mixer of the unit is at least
partially surrounded by a slot which encompasses the common airway and which is connected
to the gas governor via an air pressure signal port configured to provide the air
pressure signal from the slot to the gas governor. Documents
CN2434553Y and
CN107676981A show similar appliances.
[0006] Document
JP 2019 203657 A describes a hot water supply device that includes a burner unit, a gas supply passage
for supplying a fuel gas to a burner of the burner unit, a fan unit for supplying
combustion air to the burner, a mixing portion for mixing the fuel gas to the combustion
air at a downstream side of the fan unit to produce an air-fuel mixture, and a zero
governor disposed in the gas supply passage to adjust the fuel gas supplied under
a prescribed primary pressure to a secondary pressure according to a prescribed signal
pressure, to supply the fuel gas to the mixing portion. The mixing portion is composed
of a venturi in which the air flows by rotation of the fan unit, and which sucks the
fuel gas supplied from the zero governor by pressure reduction generated at that time,
and a signal pressure to the zero governor is taken out from a downstream side with
respect to the venturi.
Summary of the Invention
[0007] The present invention relates to an air-gas mixture burning appliance that comprises
an air-gas mixing unit with a plurality of air-gas mixers for mixing of air and gas
to form a combustible air-gas mixture, an air supply that is connected to the air-gas
mixing unit and comprises a common air way for supply of air to the plurality of air-gas
mixers, a gas supply to supply gas to the air-gas mixing unit, and a gas governor
that is adapted to control supply of gas to the plurality of air-gas mixers dependant
on an air pressure signal that is indicative of a static air pressure in the common
air way. The plurality of air-gas mixers is at least partially surrounded by a slot
which encompasses at least partially the common air way, and the slot is connected
to the gas governor via an air pressure signal port which is configured to provide
the air pressure signal from the slot to the gas governor.
[0008] The gas governor may be embodied to perform a pneumatic air-gas ratio control. The
gas used by the inventive air-gas mixture burning appliance may be hydrogen.
[0009] Advantageously, provision of the slot that surrounds at least partially the plurality
of air-gas mixers of the air-gas mixing unit in the inventive air-gas mixture burning
appliance allows stable and undisturbed measurement of static air pressure in the
air-gas mixing unit of the inventive air-gas mixture burning appliance. Thus, an improved
air pressure signal representing the mean static air pressure experienced by all air-gas
mixers of the plurality of air-gas mixers can be provided to the gas governor of the
inventive air-gas mixture burning appliance such that control of supply of gas to
the plurality of air-gas mixers by means of the gas governor may be improved significantly.
[0010] According to one aspect, the slot is connected to the air pressure signal port via
an associated plenum chamber.
[0011] Thus, the air pressure signal that is provided from the slot via the air pressure
signal port to the gas governor may further be stabilised.
[0012] Preferably, the plenum chamber is connected to the slot via a first plenum opening,
the plenum chamber is connected to the air pressure signal port via a second plenum
opening, and the second plenum opening is arranged closer to the common airway than
the first plenum opening.
[0013] This configuration is advantageous by providing an enhanced stability and accuracy
in reading of the air pressure signal, thus, allowing the air pressure signal to be
more representative of the true average static air pressure in the common air way,
i.e. of all air-gas mixers of the plurality of air-gas mixers.
[0014] Preferably, the slot faces into an air flow which is directed via the common air
way toward the plurality of air-gas mixers.
[0015] Thus, the air flow may directly enter the slot via the common air way.
[0016] The plurality of air-gas mixers is preferably arranged inside a housing, and the
slot is formed inside, and at least partly along the housing.
[0017] Accordingly, the slot may easily be formed and provided in the inventive air-gas
mixture burning appliance.
[0018] According to one aspect, each one of the plurality of air-gas mixers is connected
at a respective inlet side to a manifold, and the slot is formed in the manifold.
Each one of the plurality of air-gas mixers may be embodied as a Venturi-type mixing
nozzle.
[0019] Thus, the plurality of air-gas mixers may securely and reliably be interconnected
mechanically to form a single air-gas mixing unit in the inventive air-gas mixture
burning appliance.
[0020] According to one aspect, each one of the plurality of air-gas mixers is configured
to restrict a gas flow supplied from the gas governor upstream of an associated point
of mixing where the gas flow is combined with an air flow which is directed via the
common air way toward the plurality of air-gas mixers.
[0021] Accordingly, the mixing of air and gas to form the combustible air-gas mixture may
easily be improved.
[0022] According to one aspect, the slot extends relative to a flow direction of the combustible
air-gas mixture to such an extent that the air pressure signal port is located entirely
downstream of the associated point of mixing.
[0023] This configuration is also advantageous by providing an enhanced stability and accuracy
in reading of the air pressure signal, thus, allowing the air pressure signal to be
more representative of the true average static air pressure in the common air way,
i.e. of all air-gas mixers of the plurality of air-gas mixers.
[0024] Preferably, the slot has a width that ranges between 1mm and 9mm.
[0025] By providing the slot with a width that ranges between 1mm and 9mm, an adequate reading
of the air pressure signal may be guaranteed. In fact, if the slot width is greater
than 9mm, then the pressure reading is no longer representative of the true average
static air pressure due to the flow of air not being restricted sufficiently. However,
if the slot width is less than 1mm, then a respective response time in reading of
the air pressure signal will be too great and affect performance and efficiency of
the gas governor and, hence, performance and efficiency of the air-gas mixture burning
appliance as such, as the gas governor may lag changes in air flow rate.
Brief Description of the Drawings
[0026] Exemplary embodiments of the present invention are described in detail hereinafter
with reference to the attached drawings. In these attached drawings, identical or
identically functioning components and elements are labelled with identical reference
signs and they are generally only described once in the following description.
Fig. 1shows a schematic view of an air-gas mixture burning appliance with an air-gas
mixing unit according to the present invention,
Fig. 2shows a schematic cross-sectional view of the air-gas mixing unit of Fig. 1
according to a first embodiment,
Fig. 3shows a top view of the air-gas mixing unit of Fig. 2,
Fig. 4shows a functional representation of the air-gas mixture burning appliance of
Fig. 1 to Fig. 4,
Fig. 5shows a schematic cross-sectional view of the air-gas mixing unit of Fig. 1
according to a second embodiment, and
Fig. 6shows a schematic cross-sectional view of the air-gas mixing unit of Fig. 1
according to a third embodiment.
Detailed Description
[0027] Fig. 1 shows an exemplary air-gas mixture burning appliance 100 with an air-gas mixing
unit 110, an air supply 112, a gas supply 116, and a burning unit 120. By way of example,
the air-gas mixture burning appliance 100 may be used in a boiler or, more generally,
in a building heating system. Preferably, the gas used is hydrogen such that the air-gas
mixture burning appliance 100 forms an air-hydrogen mixture burning appliance.
[0028] The air-gas mixing unit 110 is adapted for mixing of air and gas to form a combustible
air-gas mixture 130. Preferentially, the combustible air-gas mixture 130 is a homogenous
mixture of the air and the gas.
[0029] The air is drawn into the air-gas mixing unit 110 via the air supply 112, which is
connected to the air-gas mixing unit 110, and the gas is supplied to the air-gas mixing
unit 110 via the gas supply 116. Illustratively, the air supply 112 includes a fan
114 that may be operated with an adaptable fan speed and/or within predetermined ranges
of fan speeds to draw air into the air-gas mixing unit 110.
[0030] According to the invention, the air supply 112 and the gas supply 116 are interconnected
via a plurality of air-gas mixers 118 of the air-gas mixing unit 110. Each one of
the plurality of air-gas mixers 118 forms an associated discrete point of mixing 119.
The combustible air-gas mixture 130 is formed at all such discrete points of mixing
119 from a respective air flow 140 supplied via the air supply 112 and a respective
gas flow 150 supplied via the gas supply 116. The combustible air-gas mixture 130
is then guided via the plurality of air-gas mixers 118 to the burning unit 120. Illustratively,
the burning unit 120 is provided with a burner surface 124 that is arranged downstream
of the air-gas mixing unit 110 such that the combustible air-gas mixture 130 that
is formed at the points of mixing 119 flows towards the burner surface 124. The combustible
air-gas mixture 130 is burned by the burning unit 120 and, more specifically, at the
burner surface 124. By way of example, the burner surface 124 is illustrated with
a comparatively small flame 122 which occurs e.g. at a low firing rate of the air-gas
mixing unit 110, i.e. at a comparatively low rate at which feed of the combustible
air-gas mixture 130 from the air-gas mixing unit 110 to the burning unit 120 occurs,
in terms of volume, heat units, or weight per unit time. Such a low firing rate may
e.g. be applied to the air-gas mixing unit 110 during an ignition phase of the air-gas
mixture burning appliance 100.
[0031] Fig. 2 shows the air-gas mixing unit 110 of Fig. 1 with the plurality of air-gas
mixers 118. The plurality of air-gas mixers 118 is provided for mixing of air supplied
by means of the air flow 140 and gas supplied by means of the gas flow 150 via the
gas supply 116 at respective points of mixing 119 in order to form the combustible
air-gas mixture 130.
[0032] Illustratively, the plurality of air-gas mixers 118 is arranged inside a housing
205. Preferably, each one of the plurality of air-gas mixers 118 is embodied as a
Venturi-type mixing nozzle.
[0033] For simplicity and clarity of the drawing, only a single air-gas mixer of the plurality
of air-gas mixers 118 is individually labelled in Fig. 2 with the reference sign 218.
This single air-gas mixer 218 is hereinafter described representative for all air-gas
mixers of the plurality of air-gas mixers 118, which are preferably embodied identically,
at least within predetermined manufacturing tolerances and with respect to an underlying
functioning. Thus, a detailed description of each one of the plurality of air-gas
mixers 118 may be omitted for brevity and conciseness.
[0034] The air-gas mixer 218 and, thus, each one of the plurality of air-gas mixers 118
has an air inlet 240 and a combustible air-gas mixture outlet 250. Furthermore, the
air-gas mixer 218 and, thus, each one of the plurality of air-gas mixers 118 is connected
to the gas supply 116 such that the gas flow 150 is guided from the gas supply 116
to the point of mixing 119 that is associated with the air-gas mixer 218. Preferably,
the air-gas mixer 218 and, thus, each one of the plurality of air-gas mixers 118 is
preferentially connected at its inlet side, illustratively at the air inlet 240, to
a manifold 202. If each one of the plurality of air-gas mixers 118 is embodied as
a Venturi-type mixing nozzle, then the manifold 202 may be embodied as a so-called
"Venturi-plate".
[0035] According to the invention, the plurality of air-gas mixers 118 is at least partially
surrounded by a slot 210. Preferably, the slot 210 is formed inside, and at least
partly along the housing 205, i.e. close to a respective housing wall. By way of example,
the slot 210 is formed in the manifold 202. Illustratively, the slot 210 faces the
air flow 140.
[0036] Preferably, the slot 210 is connected to an associated plenum chamber 220. The plenum
chamber 220 is preferably connected to an air pressure signal port 230.
[0037] However, it should be noted that provision of the plenum chamber 220 is not mandatory
and may also be omitted. A corresponding embodiment of the air-gas mixing unit 110
without the plenum chamber 220 is described below at Figure 6. Furthermore, it should
be noted that also a particular location of the plenum chamber 220 may vary, as e.g.
described below at Fig. 5.
[0038] Fig. 3 shows the air-gas mixing unit 110 of Fig. 1 with the plurality of air-gas
mixers 118. According to Fig. 2, the plurality of air-gas mixers 118 is arranged inside
the housing 205 and connected to the manifold 202.
[0039] In Fig. 3, the slot 210 of the air-gas mixing unit 110 is further illustrated. According
to one aspect, the slot 210 completely surrounds the plurality of air-gas mixers 118.
By way of example, the slot 210 is formed in the manifold 202 and arranged inside,
and at least partly along the housing 205.
[0040] Fig. 4 shows the air-gas mixture burning appliance 100 of Fig. 1 with the air-gas
mixing unit 110, the air supply 112, and the gas supply 116 for further illustrating
the functionality of the air-gas mixture burning appliance 100. However, for simplicity
and clarity of the drawing, illustration of the burning unit 120 is omitted.
[0041] The air-gas mixing unit 110 is embodied as described above at Fig. 2 and Fig. 3 and
comprises the plurality of air-gas mixers 118 that is arranged inside the housing
205 and connected to the manifold 202 having the slot 210. Illustratively, the housing
205 connects the air-gas mixing unit 110 to the air supply 112 and forms a common
air way 412 for the air flow 140 toward the manifold 202, for supply of air to the
plurality of air-gas mixers 118.
[0042] By means of the common air way 412, the air flow 140 is also supplied to the slot
210, which encompasses at least partially the common airway 412 More specifically,
the slot 210 faces into the air flow 140 which is directed via the common airway 412
toward the plurality of air-gas mixers 118.
[0043] According to the invention, the slot 210 is connected to a gas governor 410 via the
air pressure signal port 230 which is configured to provide an air pressure signal
430 from the slot 210 to the gas governor 410. The air pressure signal 430 is provided
from the slot 210 via the plenum chamber 220 to the gas governor 410. The plenum chamber
220 is preferably provided to allow stable and undisturbed measurement of static air
pressure in the air-gas mixing unit 110 such that the air pressure signal 430 represents
at least essentially the mean static air pressure experienced by all air-gas mixers
of the plurality of air-gas mixers 118.
[0044] According to the invention, the gas governor 410 is adapted to control supply of
gas to the plurality of air-gas mixers 118 dependant on the air pressure signal 430
that is indicative of the static air pressure in the common air way 412 and, thus,
in the air-gas mixing unit 110. The gas governor 410 controls an incoming gas flow
420 on the basis of the air pressure signal 430 to generate the gas flow 150.
[0045] In other words, the gas governor 410 is embodied to perform a pneumatic air-gas ratio
control. However, it should be noted that functioning of a gas governor to perform
a pneumatic air-gas ratio control as such is well-known to the person skilled in the
art. Thus, a more detailed description of the functioning of the gas governor 410
may be omitted for brevity and conciseness. Nevertheless, independent of a particular
realisation of the gas governor 410, each one of the plurality of air-gas mixers 118
is preferably configured to restrict the gas flow 150 supplied from the gas governor
410 upstream of the point of mixing 119 where the gas flow 150 is combined with the
air flow 140 which is directed via the common air way 412 toward the plurality of
air-gas mixers 118.
[0046] Fig. 5 shows the air-gas mixing unit 110 of Fig. 1 with the plurality of air-gas
mixers 118 that are provided for mixing of air supplied by means of the air flow 140
and gas supplied by means of the gas flow 150 via the gas supply 116 at respective
points of mixing 119 in order to form the combustible air-gas mixture 130. As described
above at Fig. 2 and Fig. 3, the plurality of air-gas mixers 118 is illustratively
arranged inside the housing 205 and connected to the manifold 202 having the slot
210 and the plenum chamber 220, which is connected to the air pressure signal port
230. The housing 205 forms the common air way 412 of Fig. 4 for the air flow 140 toward
the manifold 202 for supply of air to the plurality of air-gas mixers 118.
[0047] However, in contrast to Fig. 2 the plenum chamber 220 is now connected to the slot
210 via a first plenum opening 510 and to the air pressure signal port 230 via a second
plenum opening 520, wherein the second plenum opening 520 is arranged closer to the
common airway 412 than the first plenum opening 510. In other words, the second plenum
opening 520 is illustratively above the first plenum opening 510 in order to provide
an enhanced stability and accuracy in reading of the air pressure signal (430 in Fig.
4), thus, allowing the air pressure signal (430 in Fig. 4) to be more representative
of the true average static air pressure in the common air way 412, i.e. of all air-gas
mixers of the plurality of air-gas mixers 118.
[0048] Fig. 6 shows the air-gas mixing unit 110 of Fig. 1 with the plurality of air-gas
mixers 118 that are provided for mixing of air supplied by means of the air flow 140
and gas supplied by means of the gas flow 150 via the gas supply 116 at respective
points of mixing 119 in order to form the combustible air-gas mixture 130. As described
above at Fig. 2 and Fig. 3, the plurality of air-gas mixers 118 is arranged inside
the housing 205 and connected to the manifold 202 having the slot 210 and the air
pressure signal port 230.
[0049] However, in contrast to Fig. 2 the slot 210 is now directly connected to the air
pressure signal port 230. In other words, provision of the plenum chamber 220 is omitted.
Nevertheless, according to one aspect the slot 210 now extends relative to a flow
direction of the combustible air-gas mixture 130 to such an extent that the air pressure
signal port 230 is located entirely downstream of, i.e. illustratively below the respective
points of mixing 119.
[0050] Fig. 6 further illustrates an exemplary width 610 of the slot 210. According to one
aspect, the width 610 ranges between 1mm and 9mm. However, it should be noted that
although the width 610 is only shown in Fig. 6, it preferably applies to all embodiments
described above at Fig. 1 to Fig. 6.
1. An air-gas mixture burning appliance (100), comprising:
an air-gas mixing unit (110) with a plurality of air-gas mixers (118) for mixing of
air and gas to form a combustible air-gas mixture (130),
an air supply (112) that is connected to the air-gas mixing unit (110) and comprises
a common air way (412) for supply of air to the plurality of air-gas mixers (118),
a gas supply (116) to supply gas to the air-gas mixing unit (110), and
a gas governor (410) that is adapted to control supply of gas to the plurality of
air-gas mixers (118) dependant on an air pressure signal (430) that is indicative
of a static air pressure in the common air way (412),
wherein the plurality of air-gas mixers (118) is at least partially surrounded by
a slot (210) which encompasses at least partially the common air way (412), and
wherein the slot (210) is connected to the gas governor (410) via an air pressure
signal port (230) which is configured to provide the air pressure signal (430) from
the slot to the gas governor (410).
2. The air-gas mixture burning appliance of claim 1, wherein the slot (210) is connected
to the air pressure signal port (230) via an associated plenum chamber (220).
3. The air-gas mixture burning appliance of claim 2, wherein the plenum chamber (220)
is connected to the slot (210) via a first plenum opening (510), wherein the plenum
chamber (220) is connected to the air pressure signal port (230) via a second plenum
opening (520), and wherein the second plenum opening (520) is arranged closer to the
common airway (412) than the first plenum opening (510).
4. The air-gas mixture burning appliance of any one of the preceding claims, wherein
the slot (210) faces into an air flow (140) which is directed via the common air way
(412) toward the plurality of air-gas mixers (118).
5. The air-gas mixture burning appliance of any one of the preceding claims, wherein
the plurality of air-gas mixers (118) is arranged inside a housing (205), and wherein
the slot (210) is formed inside, and at least partly along the housing (205).
6. The air-gas mixture burning appliance of any one of the preceding claims, wherein
each one of the plurality of air-gas mixers (118) is connected at a respective inlet
side (240) to a manifold (202), and wherein the slot (210) is formed in the manifold
(202).
7. The air-gas mixture burning appliance of any one of the preceding claims, wherein
each one of the plurality of air-gas mixers (118) is configured to restrict a gas
flow (150) supplied from the gas governor (410) upstream of an associated point of
mixing (119) where the gas flow (150) is combined with an air flow (140) which is
directed via the common air way (412) toward the plurality of air-gas mixers (118).
8. The air-gas mixture burning appliance of claim 7, wherein the slot (210) extends relative
to a flow direction of the combustible air-gas mixture (130) to such an extent that
the air pressure signal port (230) is located entirely downstream of the associated
point of mixing (119).
9. The air-gas mixture burning appliance of any one of the preceding claims, wherein
the slot (210) has a width (610) that ranges between 1mm and 9mm.
1. Luft-Gas-Gemisch-Verbrennungsvorrichtung (100), die Folgendes umfasst:
eine Luft-Gas-Mischeinheit (110) mit einer Mehrzahl von Luft-Gas-Mischern (118) zum
Mischen von Luft und Gas, um ein brennbares Luft-Gas-Gemisch (130) zu bilden,
eine Luftversorgung (112), die mit der Luft-Gas-Mischeinheit (110) verbunden ist und
einen gemeinsamen Luftweg (412) zur Zufuhr von Luft zu der Mehrzahl von Luft-Gas-Mischern
(118) umfasst,
eine Gasversorgung (116) zur Zufuhr von Gas zur Luft-Gas-Mischeinheit (110), und
einen Gasregler (410), der angepasst ist zum Steuern der Zufuhr von Gas zu der Mehrzahl
von Luft-Gas-Mischern (118) in Abhängigkeit von einem Luftdrucksignal (430), das indikativ
für einen statischen Luftdruck im gemeinsamen Luftweg (412) ist,
wobei die Mehrzahl von Luft-Gas-Mischern (118) zumindest teilweise von einem Schlitz
(210) umgeben sind, der den gemeinsamen Luftweg (412) zumindest teilweise einschließt,
und
wobei der Schlitz (210) mit dem Gasregler (410) über einen Luftdruck-Signalanschluss
(230) verbunden ist, der ausgelegt ist zum Bereitstellen des Luftdrucksignal (430)
vom Schlitz zum Gasregler (410).
2. Luft-Gas-Gemisch-Verbrennungsvorrichtung nach Anspruch 1, wobei der Schlitz (210)
mit dem Luftdruck-Signalanschluss (230) über eine assoziierte Luftkammer (220) verbunden
ist.
3. Luft-Gas-Gemisch-Verbrennungsvorrichtung nach Anspruch 2, wobei die Luftkammer (220)
mit dem Schlitz (210) über eine erste Luftkammeröffnung (510) verbunden ist, wobei
die Luftkammer (220) mit dem Luftdruck-Signalanschluss (230) über eine zweite Luftkammeröffnung
(520) verbunden ist und wobei die zweite Luftkammeröffnung (520) näher am gemeinsamen
Luftweg (412) angeordnet ist als die erste Luftkammeröffnung (510) .
4. Luft-Gas-Gemisch-Verbrennungsvorrichtung nach einem der vorhergehenden Ansprüche,
wobei der Schlitz (210) in einen Luftstrom (140) zeigt, der über den gemeinsamen Luftweg
(412) in Richtung der Mehrzahl von Luft-Gas-Mischern (118) gerichtet ist.
5. Luft-Gas-Gemisch-Verbrennungsvorrichtung nach einem der vorhergehenden Ansprüche,
wobei die Mehrzahl von Luft-Gas-Mischern (118) innerhalb eines Gehäuses (205) angeordnet
sind und wobei der Schlitz (210) im Inneren und zumindest teilweise entlang des Gehäuses
(205) gebildet ist.
6. Luft-Gas-Gemisch-Verbrennungsvorrichtung nach einem der vorhergehenden Ansprüche,
wobei jeder der Mehrzahl von Luft-Gas-Mischers (118) an einer entsprechenden Einlassseite
(240) mit einem Verteiler (202) verbunden ist, und wobei der Schlitz (210) im Verteiler
(202) gebildet ist.
7. Luft-Gas-Gemisch-Verbrennungsvorrichtung nach einem der vorhergehenden Ansprüche,
wobei jeder der Mehrzahl von Luft-Gas-Mischern (118) ausgelegt ist zum Beschränken
eines Gasstroms (150), der vom Gasregler (410) stromaufwärts eines assoziierten Punkts
des Mischens (119) zugeführt wird, wo der Gasstrom (150) mit einem Luftstrom (140)
kombiniert wird, der über den gemeinsamen Luftweg (412) in Richtung der Mehrzahl von
Luft-Gas-Mischern (118) geleitet wird.
8. Luft-Gas-Gemisch-Verbrennungsvorrichtung nach Anspruch 7, wobei sich der Schlitz (210)
relativ zu einer Strömungsrichtung des brennbaren Luft-Gas-Gemischs (130) in einem
Ausmaß erstreckt, dass sich der Luftdruck-Signalanschluss (230) vollständig stromabwärts
des assoziierten Punkts des Mischens (119) befindet.
9. Luft-Gas-Gemisch-Verbrennungsvorrichtung mach einem der vorhergehenden Ansprüche,
wobei der Schlitz (210) eine Breite (610) aufweist, die im Bereich zwischen 1 mm und
9 mm liegt.
1. Appareil de combustion de mélange air-gaz (100), comprenant :
une unité de mélangeage gaz-air (110) avec une pluralité de mélangeurs gaz-air (118)
pour le mélangeage d'air et de gaz pour former un mélange air-gaz combustible (130),
une alimentation en air (112) qui est raccordée à l'unité de mélangeage gaz-air (110)
et comprend un passage d'air commun (412) pour l'alimentation en air à la pluralité
de mélangeurs gaz-air (118),
une alimentation en gaz (116) pour effectuer l'alimentation en gaz à l'unité de mélangeage
gaz-air (110), et
un régulateur de gaz (410) qui est adapté pour commander l'alimentation en gaz à la
pluralité de mélangeurs gaz-air (118) en fonction d'un signal de pression d'air (430)
qui est indicatif d'une pression d'air statique dans le passage d'air commun (412),
dans lequel la pluralité de mélangeurs gaz-air (118) est au moins partiellement entourée
par une fente (210) qui englobe au moins partiellement le passage d'air commun (412),
et
dans lequel la fente (210) est reliée au régulateur de gaz (410) par l'intermédiaire
d'un orifice de signal de pression d'air (230) qui est configuré pour fournir le signal
de pression d'air (430) depuis la fente au régulateur de gaz (410).
2. Appareil de combustion de mélange air-gaz selon la revendication 1, dans lequel la
fente (210) est reliée à l'orifice de signal de pression d'air (230) par l'intermédiaire
d'une chambre de distribution associée (220).
3. Appareil de combustion de mélange air-gaz selon la revendication 2, dans lequel la
chambre de distribution (220) est reliée à la fente (210) par l'intermédiaire d'une
première ouverture de distribution (510), dans lequel la chambre de distribution (220)
est reliée à l'orifice de signal de pression d'air (230) par l'intermédiaire d'une
seconde ouverture de distribution (520), et dans lequel la seconde ouverture de distribution
(520) est agencée plus près du passage d'air commun (412) que la première ouverture
de distribution (510).
4. Appareil de combustion de mélange air-gaz selon l'une quelconque des revendications
précédentes, dans lequel la fente (210) fait face à un écoulement d'air (140) qui
est dirigé par l'intermédiaire du passage d'air commun (412) vers la pluralité de
mélangeurs gaz-air (118).
5. Appareil de combustion de mélange air-gaz selon l'une quelconque des revendications
précédentes, dans lequel la pluralité de mélangeurs gaz-air (118) est agencée à l'intérieur
d'un logement (205), et dans lequel la fente (210) est formée à l'intérieur, et au
moins partiellement le long du logement (205).
6. Appareil de combustion de mélange air-gaz selon l'une quelconque des revendications
précédentes, dans lequel chacun de la pluralité de mélangeurs gaz-air (118) est relié,
sur un côté d'entrée respectif (240), à un collecteur (202), et dans lequel la fente
(210) est formée dans le collecteur (202).
7. Appareil de combustion de mélange air-gaz selon l'une quelconque des revendications
précédentes, dans lequel chacun de la pluralité de mélangeurs gaz-air (118) est configuré
pour limiter un écoulement de gaz (150) fourni depuis le régulateur de gaz (410) en
amont d'un point associé de mélangeage (119) où l'écoulement de gaz (150) est associé
à un écoulement d'air (140) qui est dirigé par l'intermédiaire du passage d'air commun
(412) vers la pluralité de mélangeurs gaz-air (118).
8. Appareil de combustion de mélange air-gaz selon la revendication 7, dans lequel la
fente (210) s'étend relativement à une direction d'écoulement du mélange air-gaz combustible
(130) de manière telle que l'orifice de signal de pression d'air (230) soit situé
entièrement en aval du point associé de mélangeage (119).
9. Appareil de combustion de mélange air-gaz selon l'une quelconque des revendications
précédentes, dans lequel la fente (210) a une largeur (610) qui varie entre 1 mm et
9 mm.