EP3460326B1 - Brenner und gaswasserheizer damit - Google Patents

Brenner und gaswasserheizer damit Download PDF

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Publication number
EP3460326B1
EP3460326B1 EP17874506.3A EP17874506A EP3460326B1 EP 3460326 B1 EP3460326 B1 EP 3460326B1 EP 17874506 A EP17874506 A EP 17874506A EP 3460326 B1 EP3460326 B1 EP 3460326B1
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EP
European Patent Office
Prior art keywords
burning
rich
lean
casing portion
rich burning
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Application number
EP17874506.3A
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English (en)
French (fr)
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EP3460326A1 (de
EP3460326A4 (de
Inventor
Chengzhi XUE
Xianfeng Dai
Guorong LIANG
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Midea Group Co Ltd
Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Original Assignee
Midea Group Co Ltd
Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
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Publication date
Priority claimed from CN201611059207.1A external-priority patent/CN108006630B/zh
Application filed by Midea Group Co Ltd, Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd filed Critical Midea Group Co Ltd
Publication of EP3460326A1 publication Critical patent/EP3460326A1/de
Publication of EP3460326A4 publication Critical patent/EP3460326A4/de
Application granted granted Critical
Publication of EP3460326B1 publication Critical patent/EP3460326B1/de
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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
    • F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
    • F23D14/045—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with a plurality of burner bars assembled together, e.g. in a grid-like arrangement
    • 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, e.g. noise reduction means
    • F23D14/48—Nozzles
    • F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
    • F23D14/583—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration of elongated shape, e.g. slits
    • F23D14/586—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration of elongated shape, e.g. slits formed by a set of sheets, strips, ribbons or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/10—Flame diffusing means
    • F23D2203/108—Flame diffusing means with stacked sheets or strips forming the outlets

Definitions

  • the present disclosure relates to a field of house appliance, and more particularly to a burner and a gas water heater with the same.
  • JP 2013 205000 A concerns a thick-and-thin-fuel-combustion burner.
  • JP 2014 126217 A concerns a combustion apparatus provided with a concentration burner including a flame rod which aims to stop combustion when oxygen is lacking.
  • the present invention seeks to solve at least one of the problems existing in the related art to at least some extent.
  • a burner is provided by the present invention, the burner may reduce emission of nitrogen oxides in fume and reduce environment pollution.
  • the present invention further provides a gas water heater with the burner.
  • the first rich burning flame port and the second rich burning flame port of the burning unit are located at two sides of the plurality of lean burning flame ports respectively, so as to form the stable flame structure having the lean burning flame in the middle and the rich burning flames at both sides, thereby reducing the flame temperature and controlling emission of the nitrogen oxides in the fume after the burning.
  • H1 The height difference between the top surface of the outer side wall of the first blind passage and the top surface of the flow-adjustment device and the height difference between the top surface of the outer side wall of the second blind passage and the top surface of the flow-adjustment device are denoted by H1, and the height difference between the top surface of the outer side wall of the first rich burning flame port and the top surface of the flow-adjustment device and the height difference between the top surface of the outer side wall of the second rich burning flame port and the top surface of the flow-adjustment device are denoted by H2, in which H2 ⁇ H1, thereby controlling stability of flow at the rich burning flame ports and the lean burning flame port, further improving the stability of the burning flame and further reducing emission of nitrogen oxides in fume.
  • the burner according to embodiments of the present invention further includes the following additional technical features.
  • a maximum width of the first blind passage and a maximum width of the second blind passage are equal and denoted by W2, and a maximum width of the first rich burning flame port and a maximum width of the second rich burning flame port are equal and denoted by W1, and W2 ⁇ W1.
  • a ratio of the amount of air to that of fuel gas in theory for complete burning of fuel gas is denoted by ⁇ S
  • ⁇ R a mixture ratio of the amount of air to that of fuel gas at the rich burning injection inlet
  • a ratio of the amount of air to that of fuel gas in theory for complete burning of fuel gas is denoted by ⁇ S
  • ⁇ L a mixture ratio of the amount of air to that of fuel gas at the lean burning injection inlet
  • the burner casing further includes a lean burning injector, connected to the first lean burning casing portion and the second lean burning casing portion, in which the lean burning injection inlet is arranged on the lean burning injector; and a rich burning injector, connected to the first rich burning casing portion and the second rich burning casing portion and in communication with the first rich burning cavity and the second rich burning cavity, in which the rich burning injector is located above the lean burning injector and the rich burning injection inlet is arranged on the rich burning injector.
  • a lean burning injector connected to the first lean burning casing portion and the second lean burning casing portion, in which the lean burning injection inlet is arranged on the lean burning injector
  • a rich burning injector connected to the first rich burning casing portion and the second rich burning casing portion and in communication with the first rich burning cavity and the second rich burning cavity, in which the rich burning injector is located above the lean burning injector and the rich burning injection inlet is arranged on the rich burning injector.
  • the burning unit further includes a rich burning nozzle configured to provide the rich burning injection inlet with the fuel gas and corresponding to the rich burning injector port; and a lean burning nozzle configured to provide the lean burning injection inlet with the fuel gas and corresponding to the lean burning injector port.
  • the burner further includes a primary air adjusting plate arranged in front of the rich burning injector port and the lean burning injector port so as to adjust an amount of injection air.
  • the burner further includes a secondary air adjusting plate arranged below the burning unit, in which the primary air adjusting plate extends downwardly and defines a pressure balancing chamber between the primary air adjusting plate and the secondary air adjusting plate.
  • a plurality of burning units are provided and arranged along a width direction of the burning unit.
  • the gas water heater having the burner of the above embodiments is provided.
  • the gas water heater according to embodiments of the present invention also has the above technical effects. That is to say, the gas water heater according to embodiments of the present invention is provided with the burner according to the above embodiments, thereby the stability of flame structure may be improved, the temperature of the flame may be reduced and the emission of nitrogen oxides in fume of the gas water heater may be reduced.
  • first and second are used herein for purposes of description and are not intended to indicate or imply relative importance or significance or to imply the number of indicated technical features.
  • the feature defined with “first” and “second” may comprise one or more of this feature.
  • the term “a plurality of' means two or more than two, unless specified otherwise.
  • the terms “mounted,” “connected,” “coupled,” “fixed” and the like are used broadly, and may be, for example, fixed connections, detachable connections, or integral connections; may also be mechanical or electrical connections; may also be direct connections or indirect connections via intervening structures; may also be inner communications of two elements, which can be understood by those skilled in the art according to specific situations.
  • the burner according to the invention includes at least one burning unit 1, each burning unit 1 includes a burner casing 11 and a flow-adjustment device 14.
  • the burner casing 11 defines a first rich burning cavity 1111, a second rich burning cavity 1121 and a lean burning cavity 1141 therein.
  • the burner casing 11 is provided with a rich burning injection inlet 131 in communication with the first rich burning cavity 1111 and the second rich burning cavity 1121, a lean burning injection inlet 121 in communication with the lean burning cavity 1141, a first rich burning flame port 118 in communication with the first rich burning cavity 1111, a second rich burning flame port 119 in communication with the second rich burning cavity 1121 and a lean burning opening 115 in communication with the lean burning cavity 1141 thereon.
  • the flow-adjustment device 14 is arranged in the lean burning opening 115 and the flow-adjustment device 14 is provided with a plurality of lean burning flame ports 141 in communication with the lean burning cavity 1141, the first rich burning flame port 118 and the second rich burning flame port 119 are located at two sides of the plurality of lean burning flame ports 141 respectively.
  • a first blind passage 116 and a second blind passage 117 may be defined between the flow-adjustment device 14 and two side walls of the lean burning opening 115 respectively, the first blind passage 116 is located between the first rich burning flame port 118 and the plurality of lean burning flame ports 141, and the second blind passage 117 is located between the second rich burning flame port 119 and the plurality of lean burning flame ports 141.
  • the burner may include one or more burning units 1, for example, the burner may include a plurality of burning units 1, the plurality of burning units 1 are arranged side by side and are arrayed along a width direction of the burning unit 1.
  • the width direction refers to a left-right direction shown in Fig. 5 and Fig. 7 .
  • Each burning unit 1 includes the burner casing 11 and the flow-adjustment device 14, the flow-adjustment device 14 is arranged in the burner casing 11.
  • the burner casing 11 defines the first rich burning cavity 1111 therein, the second rich burning cavity 1121 and the lean burning cavity 1141 therein.
  • the burner casing 11 is provided with the rich burning injection inlet 131, the lean burning injection inlet 121, the first rich burning flame port 118, the second rich burning flame port 119 and the lean burning opening 115 thereon.
  • the rich burning injection inlet 131 is configured to introduce air for the rich burning and the lean burning injection inlet 121 is configured to introduce air for the lean burning. Referring to Fig. 1-Fig. 3 and Fig. 6 , the rich burning injection inlet 131 is located above the lean burning injection inlet 121.
  • the rich burning injection inlet 131 is in communication with the first rich burning cavity 1111 and the second rich burning cavity 1121, the first rich burning cavity 1111 is in communication with the first rich burning flame port 118, the second rich burning cavity 1121 is in communication with the second rich burning flame port 119, the lean burning injection inlet 121 is in communication with the lean burning cavity 1141, as well the lean burning cavity 1141 is in communication with the lean burning opening 115.
  • the air is introduced in from the rich burning injection inlet 131 and is mixed with fuel gas to form rich burning gas, the rich burning gas after being mixed may enter the first rich burning cavity 1111 and the second rich burning cavity 1121, then be led to the first rich burning flame port 118 and the second rich burning flame port 119 respectively.
  • the air introduced in by the lean burning injection inlet 121 is mixed with the fuel gas to form lean burning gas which flows to the lean burning cavity 1141 then.
  • the flow-adjustment device 14 is arranged in the lean burning opening 115, the flow-adjustment device 14 is provided with the plurality of lean burning flame ports 141, the lean burning cavity 1141 is in communication with the plurality of lean burning flame ports 141, and the lean burning gas may be led to the plurality of lean burning flame ports 141.
  • the first rich burning flame port 118 and the second lean burning flame port 141 are arranged at two sides of the lean burning opening 115 respectively, the plurality of lean burning flame ports 141 are located between the first rich burning flame port 118 and the second rich burning flame port 119. In this way, a structure having a middle configured to be the lean burning flame ports 141 and two sides configured to be the rich burning ports may be formed at the top of each burning unit 1.
  • the burning unit 1 may allow a flame structure having a lean flame in the middle and rich flames at the two sides during the burning, so that stability of the flame may be improved, and temperature of the burning flame may be reduced, controlling emission of nitrogen oxides in fume.
  • the flow-adjustment device 14 is arranged in the lean burning opening 115 and is connected to the two side walls of the lean burning opening 115.
  • the flow-adjustment device 14 defines the first blind passage 116 and the second blind passage 117 with the two side walls of the lean burning opening 115 respectively, nether the first blind passage 116 nor the second blind passage 117 is in communication with the lean burning cavity 1141.
  • the first rich burning flame port 118 may be spaced apart from the plurality of lean burning flame ports 141 by means of the first blind passage 116, and the second rich burning flame port 119 may be spaced apart from the plurality of lean burning flame ports 141 by means of the second blind passage 117, thereby the flame structure being more stable, the emission of nitrogen oxides in fume being effectively controlled.
  • a top surface of an outer side wall of the first blind passage 116 is flush with a top surface of an outer side wall of the second blind passage 117 and is higher than a top surface of the flow-adjustment device 14.
  • a top surface of an outer side wall of the first rich burning flame port 118 is flush with that of the second rich burning flame port 119 and is higher than the top surface of the outer side wall of the first blind passage 116 and the top surface of the outer side wall of the second blind passage 117.
  • a height difference between the top surface of the outer side wall of the first blind passage 116 and the top surface of the flow-adjustment device 14 and a height difference between the top surface of the outer side wall of the second blind passage 117 and the top surface of the flow-adjustment device 14 are denoted by H1, and a height difference between the top surface of the outer side wall of the first rich burning flame port 118 and the top surface of the flow-adjustment device 14 and a height difference between the top surface of the outer side wall of the second rich burning flame port 119 and the top surface of the flow-adjustment device 14 are denoted by H2, in which H2 ⁇ H1, thereby controlling stability of the flow at the rich burning flame ports and the lean burning flame port 141, further improving the stability of the burning flame and further reducing emission of nitrogen oxides in fume.
  • the first rich burning flame port 118 and the second rich burning flame port 119 of the burning unit 1 are located at two sides of the plurality of lean burning flame ports 141 respectively, so as to form the stable flame structure having the lean burning flame in the middle and the rich burning flames at two sides, thereby reducing the flame temperature and controlling emission of the nitrogen oxides in the fume after the burning.
  • a height difference between the top surface of the outer side wall of the first blind passage 116 and the top surface of the flow-adjustment device 14 and a height difference between the top surface of the outer side wall of the second blind passage 117 and the top surface of the flow-adjustment device 14 are denoted by H1, and a height difference between the top surface of the outer side wall of the first rich burning flame port 118 and the top surface of the flow-adjustment device 14 and a height difference between the top surface of the outer side wall of the second rich burning flame port 119 and the top surface of the flow-adjustment device 14 are denoted by H2, in which H2 ⁇ H1, thereby controlling stability of the flow at the rich burning flame ports and the lean burning flame port 141, further improving the stability of the burning flame and further reducing emission of nitrogen oxides in fume.
  • the maximum width of the first blind passage 116 and the maximum width of the second blind passage 117 may be equal and denoted by W2, the maximum width of the first rich burning flame port 118 and the maximum width of the second rich burning flame port 119 are equal and denoted by W1, in which W2 ⁇ W1, thereby further ensuring the structural stability of the burning flames.
  • the maximum width of the first rich burning flame port 118 refers to the maximum width of a narrow side of the first rich burning flame port 118 along a left-right direction
  • the maximum width of the second rich burning flame port 119 refers to the maximum width of a narrow side of the second rich burning flame port 119 along the left-right direction.
  • the maximum width of the first blind passage 116 and the maximum width of the second blind passage 117 refer to the maximum widths of narrow sides of the first blind passage 116 and the second blind passage 117 along the left-right direction respectively.
  • the maximum widths of narrow sides of the first blind passage 116 and the second blind passage 117 are equal and configured to be W2
  • the maximum widths of narrow sides of the first rich burning flame port 118 and the second rich burning flame port 119 are equal and configured to be W1
  • the maximum widths W2 of narrow sides of the first blind passage 116 and the second blind passage 117 are larger than or equal to the maximum widths W1 of narrow sides of the first rich burning flame port 118 and the second rich burning flame port 119.
  • the rectifying device 14 may include a plurality of rectifying plates.
  • the plurality of rectifying plates define a plurality of finedraw-type passages therebetween.
  • the plurality of lean burning flame ports 141 are formed at a top of each finedraw-type passage.
  • the maximum width W3 of the lean burning flame port 141 refers to the maximum width of a narrow side of a top opening of each finedraw-type passage along the left-right direction
  • a ratio of the amount of air to that of the fuel gas in theory for complete burning of fuel gas may be denoted by ⁇ S
  • ⁇ R / ⁇ S refers to a primary air ratio of the rich burning.
  • the ratio of the amount of air to that of the fuel gas in theory for complete burning of fuel gas may be denoted by ⁇ S
  • ⁇ R / ⁇ S refers to a primary air ratio of the lean burning.
  • the burner casing 11 includes a first lean burning casing portion 113, a second lean burning casing portion 114, a first rich burning casing portion 111 and a second rich burning casing portion 112.
  • the first lean burning casing portion 113 and the second lean burning casing portion 114 are connected together and define the lean burning cavity 1141 and the lean burning opening 115.
  • the flow-adjustment device 14 is arranged between the first lean burning casing portion 113 and the second lean burning casing portion 114 and located at the lean burning opening 115.
  • the first rich burning casing portion 111 is connected to the first lean burning casing portion 113 and is located outside of the first lean burning casing portion 113.
  • the first rich burning casing portion 111 and the first lean burning casing portion 113 define the first rich burning cavity 1111 and the first rich burning flame port 118 together.
  • the second rich burning casing portion 112 is connected to the second lean burning casing portion 114 and located outside of the second lean burning casing portion 114.
  • the second rich burning casing portion 112 and the second lean burning casing portion 114 define the second rich burning cavity 1121 and the second rich burning flame port 119 together.
  • the first rich burning flame port 118 and the second rich burning flame port 119 are located at two sides of the lean burning opening 115 respectively.
  • the flow-adjustment device 14 is arranged at the lean burning opening 115 and is provided with the plurality of lean burning flame ports 141.
  • the plurality of lean burning flame ports 141 are arranged at the top of the flow-adjustment device 14.
  • the first rich burning flame port 118 and the second rich burning flame port 119 are located at two sides of the plurality of lean burning flame ports 141 respectively, thereby facilitating formation of the stable flame structure having the lean burning flame in the middle and the rich burning flames at two sides, so as improving the stability of the flames, reducing the temperature of flames and reducing the emission of nitrogen oxides.
  • the burner casing 11 further includes a plurality of connecting slats 17. Two ends of each connecting slat 17 are connected to the first rich burning casing portion 111 and the second rich burning casing portion 112 respectively.
  • the plurality of connecting slats 17 divide each of the first rich burning flame port 118, the second rich burning flame port 119 and the lean burning flame port 141 into a plurality of segments.
  • the lean burning flame and the rich burning flame may be divided into a plurality of segments, thereby increasing a heat dissipation area of the flame and reducing the flame temperature.
  • the burner casing 11 may further include a lean burning injector 12 and a rich burning injector 13.
  • the lean burning injector 12 is connected to the first lean burning casing portion 113 and the second lean burning casing portion 114.
  • the lean burning injection inlet 121 is arranged on the lean burner.
  • the rich burning injector 13 is connected to the first rich burning casing portion 111 and the second rich burning casing portion 112 and is in communication with the first rich burning cavity 1111 and the second rich burning cavity 1121.
  • the rich burning injector 13 is located above the lean burning injector 12, and the rich burning injection inlet 131 is arranged on the rich burning injector 13.
  • the fuel gas and the introduced air may be led to the first rich burning cavity 1111 and the second rich burning cavity 1121 through the rich burning injector 13, the fuel gas and the air are mixed in the first rich burning cavity 1111 and the second rich burning cavity 1121, and the mixed gas is led to the first rich burning flame port 118 and the second rich burning flame port 119.
  • the fuel gas and the introduced air may be led to the lean burning cavity 1141 through the lean burning injector 12, the fuel gas and the air may be mixed in the lean burning cavity 1141 and the mixed gas and air may be led to the lean burning flame port 141.
  • the burning unit 1 may further include a rich burning nozzle 15 and a lean burning nozzle 16.
  • the rich burning nozzle 15 may be configured to provide the rich burning injection inlet 131 with the fuel gas and the lean burning nozzle 16 may be configured to provide the lean burning injection inlet 121 with the fuel gas.
  • the rich burning nozzle 15 is in communication with the rich burning injector 13 port and the lean burning nozzle 16 is in communication with the lean burning injection inlet 121.
  • the fuel gas may be injected into the rich burning injection inlet 131 through the rich burning nozzle 15.
  • the fuel gas is mixed with the air introduced by the rich burning injector 13 and is led to the first rich burning cavity 1111 and the second rich burning cavity 1121.
  • the fuel gas may be injected into the lean burning injection inlet 121 through the lean burning nozzle 16.
  • the fuel gas is mixed with the air introduced by the lean burning injector 12 and is led to the lean burning cavity 1141.
  • the ratio of the sectional area of the gas jet port of the rich burning nozzle 15 to that of the lean burning nozzle 16 may be controlled, so that the amount of air introduced by the lean burning injection inlet 121 and the amount of fuel gas injected by the lean burning nozzle 16, as well as the amount of air introduced by the rich burning injection inlet 131 and the amount of fuel gas injected by the rich burning nozzle 15 could have a good ratio, thereby the rich burning and the lean burning being more sufficient, and the emission of nitrogen oxides being reduced.
  • the burner may further include a primary air adjusting plate, the primary air adjusting plate is arranged in front of the rich burning injection inlet 131 and the lean burning injection inlet 121 so as to adjust an amount of injection air.
  • the amount of air introduced in the rich burning injection inlet 131 and the lean burning injection inlet 121 may be adjusted through the primary air adjusting plate, thereby a proportion of the amount of air to the fuel gas at the rich burning injection inlet 131 and the proportion of the amount of air to the fuel gas at the lean burning injection inlet 121 being further controlled.
  • the burner may further include a secondary air adjusting plate, the secondary air adjusting plate is arranged below the burning unit 1, and the primary air adjusting plate extends downwardly and defines a pressure balancing chamber between the primary air adjusting plate and the secondary air adjusting plate.
  • the primary air adjusting plate is arranged in front of the rich burning injection inlet 131 and the lean burning injection inlet 121 to adjust the amount of injection air
  • the secondary air adjusting plate is arranged below the burning unit 1 to adjust the air amount in a burning chamber
  • a lower end of the primary air adjusting plate extends downwardly and defines the pressure balancing chamber between the primary air adjusting plate and the secondary air adjusting plate.
  • air flow produced by an air blower of the burner flows to the rich burning injection inlet 131 and the lean burning injection inlet 121 through the pressure balancing chamber 21, so that primary air entering the rich burning injection inlet 131 and the lean burning injection inlet 121 is more evenly, so as to improve the burning effect.
  • the burner according to embodiments of the present invention may include the plurality of burning units 1, the primary air adjusting plate and the secondary air adjusting plate, in which the plurality of burning units 1 are arranged side by side along the width direction of the burning unit 1.
  • each burning unit 1 includes the burner casing 11, the flow-adjustment device 14, the rich burning injector 13, the lean burning injector 12, the rich burning nozzle 15 and the lean burning nozzle 16.
  • the burner casing 11 includes the first lean burning casing portion 113, the second lean burning casing portion 114, the first rich burning casing portion 111 and the second rich burning casing portion 112.
  • the first lean burning casing portion 113 and the second lean burning casing portion 114 are connected together and define the lean burning cavity 1141 and the lean burning opening 115.
  • the flow-adjustment device 14 is arranged between the first lean burning casing portion 113 and the second lean burning casing portion 114 and located at the lean burning opening 115.
  • the first rich burning casing portion 111 is connected to the first lean burning casing portion 113 and is located outside of the first lean burning casing portion 113.
  • the first rich burning casing portion 111 and the first lean burning casing portion 113 define the first rich burning cavity 1111 and the first rich burning flame port 118 together.
  • the second rich burning casing portion 112 is connected to the second lean burning casing portion 114 and located outside of the second lean burning casing portion 114.
  • the second rich burning casing portion 112 and the second lean burning casing portion 114 define the second rich burning cavity 1121 and the second rich burning flame port 119 together.
  • the first rich burning flame port 118 and the second rich burning flame port 119 are located at two sides of the lean burning opening 115 respectively.
  • the flow-adjustment device 14 is arranged at the lean burning opening 115 and is provided with the plurality of lean burning flame ports 141.
  • the plurality of lean burning flame ports 141 are arranged at the top of the flow-adjustment device 14.
  • the first rich burning flame port 118 and the second rich burning flame port 119 are located at two sides of the plurality of lean burning flame ports 141 respectively, thereby facilitating formation of the stable flame structure having the lean burning flame in the middle and the rich burning flames at two sides, so as improving the stability of the flames, reducing the temperature of flames and reducing the emission of nitrogen oxides.
  • the lean burning injector 12 is connected to the first lean burning casing portion 113 and the second lean burning casing portion 114.
  • the lean burning injection inlet 121 is arranged on the lean burner.
  • the rich burning injector 13 is connected to the first rich burning casing portion 111 and the second rich burning casing portion 112 and is in communication with the first rich burning cavity 1111 and the second rich burning cavity 1121.
  • the rich burning injector 13 is located above the lean burning injector 12, and the rich burning injection inlet 131 is arranged on the rich burning injector 13.
  • the fuel gas and the introduced air may be led to the first rich burning cavity 1111 and the second rich burning cavity 1121 through the rich burning injector 13, the fuel gas and the air are mixed and led to the first rich burning flame port 118 and the second rich burning flame port 119.
  • the fuel gas and the introduced air may be led to the lean burning cavity 1141 through the lean burning injector 12, the fuel gas and the air may be mixed led to the lean burning flame port 141.
  • the rich burning nozzle 15 may be configured to provide the rich burning injection inlet 131 with the fuel gas and the lean burning nozzle 16 may be configured to provide the lean burning injection inlet 121 with the fuel gas.
  • the rich burning nozzle 15 is in communication with the rich burning injector 13 port.
  • the lean burning nozzle 16 is in communication with the lean burning injection inlet 121.
  • the fuel gas may be injected into the rich burning injection inlet 131 through the rich burning nozzle 15.
  • the fuel gas is mixed with the air introduced by the rich burning injector 13 and is led to the first rich burning cavity 1111 and the second rich burning cavity 1121.
  • the fuel gas may be injected into the lean burning injection inlet 121 through the lean burning nozzle 16.
  • the fuel gas is mixed with the air introduced by the lean burning injector 12 and is led to the lean burning cavity 1141.
  • the ratio of the amount of air to that of fuel gas at the rich burning injection inlet 131 and the ratio of the amount of air to that of fuel gas at the lean burning injection inlet 121 may be controlled, and then the primary air ratio of the rich burning and the primary air ratio of the lean burning may be further controlled.
  • the ratio of the amount of air to that of fuel gas in theory for a complete burning of fuel gas may be denoted by ⁇ S
  • the mixture ratio of the amount of air to that of fuel gas at the rich burning injection inlet 131 may be denoted by ⁇ R
  • the mixture ratio of the amount of air to that of fuel gas at the lean burning injection inlet 121 may be denoted by ⁇ L
  • the primary air ratio of the rich burning and the lean burning can be controlled, so that the fuel gas and the air are mixed fully and have a good burning proportion, so as forming the stable flame structure and reducing the emission of nitrogen oxides in fume.
  • the first blind passage 116 and the second blind passage 117 may be defined between the flow-adjustment device 14 and two side walls of the lean burning opening 115 respectively, the first blind passage 116 is located between the first rich burning flame port 118 and the plurality of lean burning flame ports 141, and the second blind passage 117 is located between the second rich burning flame port 119 and the plurality of lean burning flame ports 141.
  • the top surface of the outer side wall of the first blind passage 116 is flush with the top surface of the outer side wall of the second blind passage 117 and is higher than the top surface of the flow-adjustment device 14.
  • the top surface of the outer side wall of the first rich burning flame port 118 is flush with the top surface of the outer side wall of the second rich burning flame port 119 and is higher than the top surface of the outer side wall of the first blind passage 116 and the top surface of the outer side wall of the second blind passage 117.
  • the height difference between the top surface of the outer side wall of the first blind passage 116 and the top surface of the flow-adjustment device 14 and the height difference between the top surface of the outer side wall of the second blind passage 117 and the top surface of the flow-adjustment device 14 are denoted by H1
  • the height difference between the top surface of the outer side wall of the first rich burning flame port 118 and the top surface of the flow-adjustment device 14 and the height difference between the top surface of the outer side wall of the second rich burning flame port 119 and the top surface of the flow-adjustment device 14 are denoted by H2
  • the maximum width of the first blind passage 116 and the maximum width of the second blind passage 117 are equal and may be denoted by W2
  • the maximum width of the first rich burning flame port 118 and the maximum width of the second rich burning flame port 119 are equal and may be denoted by W1, in which H2 ⁇ H1, W2 ⁇ W1, thereby facilitating control of stability of the flow at the rich burning flame ports
  • the primary air adjusting plate may be arranged in front of the rich burning injection inlet 131 and the lean burning injection inlet 121 of each burning unit 1, so as to adjust the amount of injection air.
  • the amount of air introduced from the rich burning injection inlet 131 and the lean burning injection inlet 121 of each the burning unit 1 may be adjusted through the primary air adjusting plate, thereby the proportion of the amount of air to that of fuel gas at the rich burning injection inlet 131 and the proportion of the amount of air to that of fuel gas at the lean burning injection inlet 121 being further controlled.
  • the secondary air adjusting plate is arranged below the burning unit 1 to adjust the amount of air in the burning chamber, the primary air adjusting plate extends downwardly and defines a pressure balancing chamber between the primary air adjusting plate and the secondary air adjusting plate.
  • the air flow produced by the air blower of the gas water heater flows to the rich burning injection inlet 131 and the lean burning injection inlet 121 through the pressure balancing chamber, so that primary air entering the rich burning injection inlet 131 and the lean burning injection inlet 121 is more evenly, so as to improve the burning effect.
  • the first rich burning flame port 118 and the second rich burning flame port 119 of the burning unit 1 are located at two sides of the plurality of lean burning flames 141, so as to form the stable flame structure having the lean burning flame in the middle and the rich burning flame at the two sides, reducing the flame temperature and controlling emission of the nitrogen oxides in the fume after the burning.
  • the structure of the burner casing 11 and the primary air ratio of the rich burning and the lean burning are defined, thereby achieving a good proportion of the air introduced by the rich burning injection inlet 131 and the lean burning injection inlet 121 to the fuel gas, and further controlling the structural stability of the burning flame and reducing the emission of nitrogen oxides.
  • the gas water heater according to embodiments of the present invention also has the above technical effects. That is to say, the gas water heater according to embodiments of the present invention is provided with the burner according to the above embodiments, the temperature of the flame may be reduced and the emission of nitrogen oxides in fume of the gas water heater may be reduced.
  • a structure in which a first feature is "on" or “below” a second feature may include an embodiment in which the first feature is in direct contact with the second feature, and may also include an embodiment in which the first feature and the second feature are not in direct contact with each other, but are contacted via an additional feature formed therebetween.
  • a first feature "on,” “above,” or “on top of' a second feature may include an embodiment in which the first feature is right or obliquely “on,” “above,” or “on top of' the second feature, or just means that the first feature is at a height higher than that of the second feature; while a first feature "below,” “under,” or “on bottom of' a second feature may include an embodiment in which the first feature is right or obliquely “below,” “under,” or “on bottom of' the second feature, or just means that the first feature is at a height lower than that of the second feature.

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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)

Claims (12)

  1. Brenner, umfassend mindestens eine Verbrennungseinheit (1), wobei die Verbrennungseinheit (1) Folgendes umfasst:
    ein Brennergehäuse (11), das einen ersten Fettverbrennungs-Hohlraum (1111), einen zweiten Fettverbrennung-Hohlraum (1121) und einen Magerverbrennungs-Hohlraum (1141) darin definiert, wobei das Brennergehäuse (11) eine Vielzahl von Verbindungsleisten (17) umfasst und mit Folgendem daran versehen ist: einem Fettverbrennungs-Einspritzeinlass (13) in Verbindung mit dem ersten Fettverbrennungs-Hohlraum (1111) und dem zweiten Fettverbrennungs-Hohlraum (1121), einem Magerverbrennungs-Einspritzeinlass (121) in Verbindung mit dem Magerverbrennungs-Hohlraum (1141), einem ersten Fettverbrennungs-Flammenkanal (118) in Verbindung mit dem ersten Fettverbrennungs-Hohlraum (1111), einem zweiten Fettverbrennungs-Flammenkanal (119) in Verbindung mit dem zweiten Fettverbrennungs-Hohlraum (1121) und einer Magerverbrennungsöffnung (115) in Verbindung mit dem Magerverbrennungs-Hohlraum (1141), und wobei das Brennergehäuse ferner einen ersten Magerverbrennungs-Gehäuseabschnitt (113) und einen zweiten Magerverbrennungs-Gehäuseabschnitt (114) umfasst, wobei der erste Magerverbrennungs-Gehäuseabschnitt (113) und der zweite Magerverbrennungs-Gehäuseabschnitt (114) miteinander verbunden sind und den Magerverbrennungs-Hohlraum (1141) und die Magerverbrennungsöffnung (115) definieren,
    einen ersten Fettverbrennungs-Gehäuseabschnitt (111) und einen zweiten Fettverbrennungs-Gehäuseabschnitt (112), wobei der erste Fettverbrennungs-Gehäuseabschnitt (111) mit dem ersten Magerverbrennungs-Gehäuseabschnitt (113) verbunden ist und sich außerhalb des ersten Magerverbrennungs-Gehäuseabschnitts (113) befindet, wobei der erste Fettverbrennungs-Gehäuseabschnitt (111) und der erste Magerverbrennungs-Gehäuseabschnitt (113) zusammen den ersten Fettverbrennungs-Hohlraum (1111) und den ersten Fettverbrennungs-Flammenkanal (118) definieren, wobei der zweite Fettverbrennungs-Gehäuseabschnitt (112) mit dem zweiten Magerverbrennungs-Gehäuseabschnitt (114) verbunden ist und sich außerhalb des zweiten Magerverbrennungs-Gehäuseabschnitts (114) befindet, wobei der zweite Fettverbrennungs-Gehäuseabschnitt (112) und der zweite Magerverbrennungs-Gehäuseabschnitt (114) zusammen den zweiten Fettverbrennungs-Hohlraum (1121) und den zweiten Fettverbrennungs-Flammenkanal (119) definieren;
    wobei die Brennereinheit (1) ferner eine Strömungseinstellvorrichtung (14) umfasst, die zwischen dem ersten Magerverbrennungs-Gehäuseabschnitt (113) und dem zweiten Magerverbrennungs-Gehäuseabschnitt (114) angeordnet ist und sich an der Magerverbrennungsöffnung (115) befindet und mit einer Vielzahl von Magerverbrennungs-Flammenkanälen (141) in Verbindung mit dem Magerverbrennungs-Hohlraum (1141) versehen ist, wobei sich der erste Fettverbrennungs-Flammenkanal (118) und der zweite Fettverbrennungs-Flammenkanal (119) jeweils auf einer von zwei Seiten der Vielzahl von Magerverbrennungs-Flammenkanälen (141) befinden, wobei ein erster Blinddurchgang (116) und ein zweiter Blinddurchgang (117) zwischen der Strömungseinstellvorrichtung (14) und jeweils einer von zwei Seitenwänden der Magerverbrennungsöffnung (141) definiert sind, wobei sich der erste Blinddurchgang (116) zwischen dem ersten Fettverbrennungs-Flammenkanal (118) und der Vielzahl von Magerverbrennungs-Flammenkanälen (141) befindet und sich der zweite Blinddurchgang (117) zwischen dem zweiten Fettverbrennungs-Flammenkanal (119) und der Vielzahl von Magerverbrennungs-Flammenkanälen (141) befindet;
    wobei eine obere Oberfläche einer äußeren Seitenwand des ersten Blinddurchgangs (116) mit einer oberen Oberfläche einer äußeren Seitenwand des zweiten Blinddurchgangs (117) bündig ist und höher als eine obere Oberfläche der Strömungseinstellvorrichtung (14) ist, wobei eine obere Oberfläche einer äußeren Seitenwand des ersten Fettverbrennungs-Flammenkanals (118) mit derjenigen des zweiten Fettverbrennungs-Flammenkanals (119) bündig ist und höher als die obere Oberfläche der äußeren Seitenwand des ersten Blinddurchgangs (116) und der oberen Oberfläche der äußeren Seitenwand des zweiten Blinddurchgangs (117) ist, wobei ein Höhenunterschied zwischen der oberen Oberfläche der äußeren Seitenwand des ersten Blinddurchgangs (116) und der oberen Oberfläche der Strömungseinstellvorrichtung (14) und ein Höhenunterschied zwischen der oberen Oberfläche der äußeren Seitenwand des zweiten Blinddurchgangs (117) und der oberen Oberfläche der Strömungseinstellvorrichtung (14) mit H1 bezeichnet sind und ein Höhenunterschied zwischen der oberen Oberfläche der äußeren Seitenwand des ersten Fettverbrennungs-Flammenkanals (118) und der oberen Oberfläche der Strömungseinstellvorrichtung (14) und ein Höhenunterschied zwischen der oberen Oberfläche der äußeren Seitenwand des zweiten Fettverbrennungs-Flammenkanals (119) und der oberen Oberfläche der Strömungseinstellvorrichtung (14) mit H2 bezeichnet sind, wobei H2 ≥ H1,
    dadurch gekennzeichnet, dass zwei Enden jeder Verbindungsleiste (17) mit dem ersten Fettverbrennungs-Gehäuseabschnitt (111) bzw. dem zweiten Fettverbrennungs-Gehäuseabschnitt (112) verbunden sind und die Vielzahl von Verbindungsleisten (17) den ersten Fettverbrennungs-Flammenkanal (118), den zweiten Fettverbrennungs-Flammenkanal (119) und den Magerverbrennungs-Flammenkanal (141) jeweils in eine Vielzahl von Segmenten teilen.
  2. Brenner nach Anspruch 1, wobei eine maximale Breite des ersten Blinddurchgangs und eine maximale Breite des zweiten Blinddurchgangs gleich sind und mit W2 bezeichnet sind, und wobei eine maximale Breite des ersten Fettverbrennungs-Flammenkanals und eine maximale Breite des zweiten Fettverbrennungs-Flammenkanals gleich sind und mit W1 bezeichnet sind, wobei W2 ≥ W1.
  3. Brenner nach Anspruch 1, wobei ein Abstand zwischen zwei äußeren Seitenwänden der Strömungseinstellvorrichtung mit W3 bezeichnet ist und eine Höhe der Strömungseinstellvorrichtung mit H bezeichnet ist, wobei W3/H = 0,03 ∼ 0,30.
  4. Brenner nach Anspruch 1, wobei ein theoretisches Verhältnis der Menge an Luft zu derjenigen an Brenngas zur vollständigen Verbrennung von Brenngas mit ΦS bezeichnet ist und ein Mischungsverhältnis der Menge an Luft zu derjenigen an Brenngas an dem Fettverbrennungs-Einspritzeinlass mit ΦR bezeichnet ist, wobei ΦR/ΦS = 0,5 ∼ 0,8.
  5. Brenner nach Anspruch 1, wobei ein theoretisches Verhältnis der Menge an Luft zu derjenigen an Brenngas zur vollständigen Verbrennung von Brenngas mit ΦS bezeichnet ist und ein Mischungsverhältnis der Menge an Luft zu derjenigen von Brenngas an dem Magerverbrennungs-Einspritzeinlass mit ΦL bezeichnet ist, wobei ΦL/ΦS = 1,5 ∼ 2,0.
  6. Brenner nach einem der vorangehenden Ansprüche, wobei das Brennergehäuse (11) ferner Folgendes umfasst:
    ein Magerverbrennungs-Einspritzventil (12), das mit dem ersten Magerverbrennungs-Gehäuseabschnitt (113) und dem zweiten Magerverbrennungs-Gehäuseabschnitt (114) verbunden ist, wobei der Magerverbrennungs-Einspritzeinlass (121) an dem Magerverbrennungs-Einspritzventil (12) angeordnet ist; und
    ein Fettverbrennungs-Einspritzventil (13), das mit dem ersten Fettverbrennungs-Gehäuseabschnitt (111) und dem zweiten Fettverbrennungs-Gehäuseabschnitt (113) verbunden ist und mit dem ersten Fettverbrennungs-Hohlraum (1111) und dem zweiten Fettverbrennungs-Hohlraum (1121) in Verbindung steht, wobei sich das Fettverbrennungs-Einspritzventil (13) über dem Magerverbrennungs-Einspritzventil (12) befindet und der Fettverbrennungs-Einspritzeinlass (131) an dem Fettverbrennungs-Einspritzventil (13) angeordnet ist.
  7. Brenner nach einem der Ansprüche 1-5, wobei die Verbrennungseinheit ferner Folgendes umfasst:
    eine Fettverbrennungsdüse (15), die dazu konfiguriert ist, dem Fettverbrennungs-Einspritzeinlass (131) das Brenngas bereitzustellen, und dem Fettverbrennungs-Einspritzventilkanal entspricht; und
    eine Magerverbrennungsdüse (16), die dazu konfiguriert ist, dem Magerverbrennungs-Einspritzeinlass (121) das Brenngas bereitzustellen, und dem Magerverbrennungs-Einspritzventilkanal entspricht.
  8. Brenner nach Anspruch 7, wobei eine Querschnittsfläche S3 eines Gasstrahlkanals der Fettverbrennungsdüse und eine Querschnittsfläche S4 eines Gasstrahlkanals der Magerverbrennungsdüse Folgendem genügen: S3/S4=0,25∼0,65.
  9. Brenner nach Anspruch 7, ferner umfassend eine Primärluft-Einstellplatte, die vor dem Fettverbrennungs-Einspritzventilkanal und dem Magerverbrennungs-Einspritzventilkanal angeordnet ist, um eine Menge an Einspritzluft einzustellen.
  10. Brenner nach Anspruch 9, ferner umfassend eine Sekundärluft-Einstellplatte, die unter der Verbrennungseinheit angeordnet ist, wobei sich die Primärluft-Einstellplatte nach unten erstreckt und eine Druckausgleichskammer zwischen der Primärluft-Einstellplatte und der Sekundärluft-Einstellplatte definiert.
  11. Brenner nach einem der Ansprüche 1-5, wobei eine Vielzahl von Verbrennungseinheiten bereitgestellt ist und entlang einer Breitenrichtung der Verbrennungseinheit angeordnet ist.
  12. Gaswassererhitzer, der den Brenner nach einem der Ansprüche 1-11 umfasst.
EP17874506.3A 2016-11-25 2017-03-31 Brenner und gaswasserheizer damit Active EP3460326B1 (de)

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PCT/CN2017/079169 WO2018094943A1 (zh) 2016-11-25 2017-03-31 燃烧器和具有其的燃气热水器

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