WO2020119689A1 - 燃烧器及燃气热水器 - Google Patents

燃烧器及燃气热水器 Download PDF

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Publication number
WO2020119689A1
WO2020119689A1 PCT/CN2019/124387 CN2019124387W WO2020119689A1 WO 2020119689 A1 WO2020119689 A1 WO 2020119689A1 CN 2019124387 W CN2019124387 W CN 2019124387W WO 2020119689 A1 WO2020119689 A1 WO 2020119689A1
Authority
WO
WIPO (PCT)
Prior art keywords
injection
burner
fire
fire row
burner according
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.)
Ceased
Application number
PCT/CN2019/124387
Other languages
English (en)
French (fr)
Inventor
陈文风
孟宪超
梁国荣
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.)
Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Original Assignee
Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd filed Critical Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Priority to EP19895866.2A priority Critical patent/EP3896338B1/en
Priority to ES19895866T priority patent/ES3051909T3/es
Publication of WO2020119689A1 publication Critical patent/WO2020119689A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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
    • F23D14/02—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
    • F23D14/08—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 axial outlets at the burner head
    • F23D14/085—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 axial outlets at the burner head with injector axis inclined to the burner head axis
    • 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
    • F23D14/10—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 elongated tubular burner head
    • 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
    • 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
    • F23D14/64—Mixing devices; Mixing tubes with injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details
    • F23D14/70—Baffles or like flow-disturbing devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details
    • F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M11/00—Safety arrangements
    • F23M11/04—Means for supervising combustion, e.g. windows
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/10—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using thermocouples
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2231/00—Fail safe
    • F23N2231/06—Fail safe for flame failures

Definitions

  • This application relates to the technical field of gas appliances, in particular to a burner and a gas water heater.
  • the burner is a key component of a series of gas products such as gas water heaters and gas wall-hung boilers.
  • gas water heaters and gas wall-hung boilers in order to achieve low emissions of nitrogen oxides during combustion, the burner usually adopts a water-cooled structure and requires a large amount of primary air intake to form a light combustion, but this The design of the structure will lead to insufficient gas concentration and unreliable ignition, which will cause the burner to fail to ignite and deflagration.
  • the main purpose of the present application is to propose a burner, which aims to increase the gas concentration at the ignition needle by reducing the amount of air ejected from the fire exhaust at the ignition needle to achieve reliable ignition of the gas.
  • the burner proposed in this application includes:
  • the first fire row has a first firing channel, and a first fire-spraying portion and a first firing inlet located at both ends of the first firing channel respectively;
  • An ignition needle is provided adjacent to the first flame spraying part
  • a first windshield plate is located at the first injection inlet, the first windshield plate has a first vent hole corresponding to the first injection inlet, and a radial direction of the first vent hole The size is smaller than the radial size of the first injection inlet.
  • the number of the first injection inlet is plural, and at least one of the first injection inlet is provided with the first wind deflector.
  • the first fire row has a plurality of the first ejection channels, and the plurality of first ejection channels are all in communication with the first fire spraying part, and the first ejection inlet and the The first ejection channels are arranged in a one-to-one correspondence.
  • the first windshield includes a plate body and a connecting flange extending from the plate body toward one side, the connecting flange is fixed to the first fire row;
  • the plate body covers the first injection inlet, and the plate body is provided with the first vent hole at a position corresponding to the first injection inlet.
  • the first flame spraying part has a plurality of first flame spraying holes, and the first flame spraying part is provided with an induction baffle extending toward the ignition needle, the induction baffle at least partially surrounding At least one of the plurality of first flame spray holes is provided, and an end of the induction flap near the ignition needle is provided in a pointed shape.
  • the minimum distance between the end of the induction flap facing the ignition needle and the first fire hole is 6 mm to 7 mm.
  • the burner further includes:
  • a second fire row, the second fire row and the first fire row are arranged in parallel, the second fire row has a second ejection channel, and second jets respectively located at both ends of the second ejection channel Ministry of Fire and Second Ejection Entrance;
  • An induction needle which is arranged close to the second flame-throwing part
  • a second wind deflector located at the second injection inlet, the second wind deflector having a second vent hole corresponding to the second injection inlet, and a diameter of the second vent hole
  • the radial dimension is smaller than the radial dimension of the second injection inlet.
  • the second fire row is disposed adjacent to the first fire row.
  • the first windshield and the second windshield are integrally provided.
  • the present application also proposes a gas water heater including a burner.
  • the burner includes:
  • the first fire row has a first firing channel, and a first fire-spraying portion and a first firing inlet located at both ends of the first firing channel respectively;
  • An ignition needle is provided adjacent to the first flame spraying part
  • a first windshield plate is located at the first injection inlet, the first windshield plate has a first vent hole corresponding to the first injection inlet, and a radial direction of the first vent hole The size is smaller than the radial size of the injection inlet.
  • the technical solution of the present application reduces the air injection amount of the first fire row by setting a first wind deflector at an injection inlet of the first fire row, thereby reducing the proportion of air in the mixed gas, that is, the mixing is relatively increased
  • concentration of the gas in the gas so that when the ignition is performed on the mixed gas, it is easier to ignite the mixed gas, avoiding ignition and deflagration, flame extinction and other phenomena during the ignition process, and improving the reliability of ignition.
  • FIG. 1 is a schematic structural diagram of an embodiment of a burner of the present application
  • FIG. 2 is a partially enlarged view at A in FIG. 1;
  • Figure 3 is a top view of the burner of Figure 1;
  • FIG. 4 is a partially enlarged view at B in FIG. 3;
  • FIG. 5 is a bottom view of the burner in FIG. 1;
  • FIG. 6 is a partial enlarged view at C in FIG. 5;
  • FIG. 7 is a schematic structural view of the first fire row in the burner of FIG. 1;
  • FIG. 8 is a plan view of the first fire row in FIG. 7;
  • FIG. 9 is a schematic structural view of the first fire row in FIG. 7 from another perspective.
  • Second vent Connecting hems 110 First ejection channel 510 Second vent
  • first”, “second”, etc. are for descriptive purposes only, and cannot be understood as instructions or hints Its relative importance or implicitly indicates the number of technical features indicated.
  • the features defined with “first” and “second” may include at least one of the features either explicitly or implicitly.
  • the meaning of “and/or” appearing throughout the text is to include three parallel plans, taking “A and/or B” as an example, including plan A, or plan B, or plans that both A and B satisfy.
  • the present application proposes a burner, which is suitable for a gas-fired heating device such as a gas water heater, a gas wall-hung boiler, and the like.
  • a gas-fired heating device such as a gas water heater, a gas wall-hung boiler, and the like.
  • the following uses a gas water heater as an example to explain the burner in detail:
  • the burner 1 includes:
  • the first fire row 10 has a first firing channel 110, and a first firing part 130 and a first firing inlet 120 located at both ends of the first firing channel 110, respectively;
  • the ignition needle 30 is disposed adjacent to the first flame spraying part 130;
  • the first wind deflector 20 is located at the first injection inlet 120, and the first wind deflector 20 has a first vent hole 210 corresponding to the first injection inlet 120, the first The radial dimension of the vent hole 210 is smaller than the radial dimension of the first injection inlet 120.
  • the burner 1 includes a plurality of fire rows arranged in parallel, the fire row has an injection channel, a flame injection part and an injection inlet, wherein the flame injection part and the injection inlet are respectively located at both ends of the injection channel, Gas and air enter the injection channel from the injection inlet, and the gas and air are mixed in the injection channel, and the resulting mixed gas is sprayed and burned from the fire injection part.
  • the fire injection part is usually located at the upper end of the fire row, and the injection inlet is located at the lower end of the fire row.
  • the injection inlet may be located at the lower end surface of the fire row or at the side wall of the fire row, which is not specifically limited here.
  • the first fire row 10 is the one closest to the ignition needle 30 among the plurality of fire rows, that is, the ignition needle 30 is provided corresponding to the first fire injection part 130 of the first fire row 10.
  • the ignition needle 30 is disposed adjacent to the first flame injection part 130.
  • the first fire row 10 has a first firing channel 110, a first fire-spraying part 130 and a first firing inlet 120.
  • the ignition needle 30 may be implemented by means of electronic ignition (piezoelectric spark ignition) or pulse continuous ignition.
  • the ignition needle 30 may ignite the mixed gas from the first flame spraying part 130 to achieve ignition and combustion of the gas.
  • the purpose of providing the first wind deflector 20 is to reduce the air injection amount of the first fire exhaust 10, thereby reducing the proportion of air in the mixed gas, that is, relatively increasing the concentration of the gas in the mixed gas, so that when the ignition needle 30 is mixed When the gas is ignited, it is easier to ignite the mixed gas, which avoids the phenomenon of ignition and deflagration and flame extinction during the ignition process, and improves the reliability of ignition.
  • the radial size of the first vent hole 210 of the first windshield 20 is smaller than the radial size of the first injection inlet 120, thereby relatively weakening the first
  • the ejection effect of the ejection inlet 120 reduces the ejection amount of air into the first ejection inlet 120.
  • the number of first injection inlets 120 provided at the lower end of the first fire row 10 may be multiple, in this case, at least one first injection inlet
  • the first windshield 20 is provided at 120 places. It can be understood that when three first injection inlets 120 are provided, the first windshield 20 may be provided at the three first injection inlets 120 at the same time to reduce the three first injection inlets 120 at the same time. The amount of air injection; or, the first windshield 20 may be provided at any two of the three first injection inlets 120; or, the one may be one of the three first injection inlets 120 ⁇ 20 ⁇ The first windshield 20.
  • the air injection volume of the entire first fire row 10 is inevitably reduced, that is, the air ratio of the mixed gas in the entire first fire row 10 is reduced, so that the gas concentration in the mixed gas relatively increases Large, improve the reliability of ignition.
  • first firing inlets 120 of the first fire row 10 there are multiple first firing inlets 120 of the first fire row 10, and there may be one or more first firing channels 110 of the first fire row 10.
  • first firing channel 110 When the first fire row 10 has only one first firing channel 110, at this time, the lower end of the first firing channel 110 is provided with a plurality of first firing inlets 120 communicating with each other; when the first fire row 10 has When there are a plurality of first injection channels 110, the plurality of first injection channels 110 are independent of each other, so that the amount of mixed gas of the first fire exhaust 10 is increased, which is beneficial to enhance the combustion intensity.
  • the first fire row 10 preferably has a plurality of first ejection channels 110, and the plurality of ejection channels are all in communication with the first fire-spraying portion 130.
  • the injection entrance and the injection channel are arranged in one-to-one correspondence.
  • the first fire row 10 has three first firing channels 110 and three first firing inlets 120, and the three firing channels are arranged in parallel along the horizontal direction.
  • the temperature of the first fire row 10 is relatively high, and the first windshield 20 is preferably made of high temperature resistant material.
  • the first wind deflector 20 is preferably a sheet metal part, so that it can be fixed on the first fire row 10 by welding.
  • the first windshield 20 includes a plate body 220 and a connecting flange 230 extending from the plate body 220 to one side, the connecting flange 230 is fixed to the first fire row 10;
  • the board body 220 covers the first injection inlet 120, and the board body 220 is provided with a first vent hole 210 at a position corresponding to the first injection inlet 120.
  • connection flange 230 is fixed on the first fire row 10 by welding, so as to reliably fix the first windshield 20 on the first fire row 10.
  • the plate body 220 is located at the lower end of the first fire row 10, and the plate body 220 covers the first injection inlet 120, and the structure in which the first vent hole 210 is provided on the plate body 220 is equivalent to reducing the radial direction of the first injection inlet 120 Size, so that the injection effect at the first injection inlet 120 is weakened, that is, the amount of air entering the first introduction channel through the first injection inlet 120 is reduced, and the gas concentration of the mixed gas is relatively increased, which is more conducive to the gas Reliable ignition.
  • the connecting flange 230 is preferably formed by folding the edge of the plate body 220. In order to facilitate the bending and folding of the connecting flange 230, a gap may be formed on the connecting flange 230 near the plate body 220 to reduce the connection The connection area of the connection between the flange 230 and the board body 220.
  • an induction baffle 140 may also be provided on the first fire row 10, the induction baffle 140 is an electrical conductor, and the induction rib is provided with a tip corresponding to the ignition needle 30 The protrusion-like protrusion generates a tip discharge phenomenon between the pointed protrusion and the ignition needle 30, thereby improving the ignition effect.
  • the first flame spraying portion 130 has a plurality of first flame spraying holes 131, and the first flame spraying portion 130 is provided with an induction flap 140 extending toward the ignition needle 30
  • the induction baffle 140 is disposed at least partially around at least one of the plurality of first flame holes 131, and the end of the induction baffle 140 near the ignition needle 30 is provided in a sharp shape.
  • the end of the induction baffle 140 near the ignition needle 30 is provided in a sharp shape, so that a tip discharge phenomenon can be generated between the ignition pin 30; the induction baffle 140 is disposed around the first fire hole 131, so as to sense the rib The mixed gas ejected from the first flame injection hole 131 may be converged, so that the concentration of the mixed gas at the tip discharge is higher, which is more conducive to ignition and ignition of the mixed gas.
  • the minimum distance between the end of the induction flap 140 facing the ignition needle 30 and the first flame injection hole 131 is preferably 6 mm to 7 mm, so that the ignition position of the mixed gas is not too close to the first flame injection Hole 131, so as to avoid the flashback phenomenon caused by the combustion flame being too close to the first flame spray hole 131.
  • the plurality of fire rows further include a second fire row 40, which has a second injection channel and second fire jets respectively located at both ends of the second injection channel Department and the second ejection entrance.
  • the structure of the second fire row 40 and the structure of the first fire row 10 may be similar or the same, or may be completely different, which is not specifically limited here.
  • the structure of the second fire row 40 is preferably similar to the structure of the first fire row 10, with the difference that the second fire row 40 is not provided with an induction baffle 140 .
  • the above burner 1 further includes:
  • Induction needle 60 located near the second fire department
  • the second wind deflector 50 is located at the second ejection inlet.
  • the second wind deflector 50 has a second vent hole corresponding to the second ejection inlet.
  • the radial size of the second vent hole is smaller than the second vent Radial dimension of injection port.
  • the sensing needle 60 may use a thermocouple or a thermosensitive element as a temperature-sensing component, so as to realize the detection of the combustion temperature.
  • the working principle of the second wind deflector 50 is similar to that of the first wind deflector 20. By setting the second wind deflector 50, the gas concentration of the mixed gas in the second ejection channel can be increased, which is more conducive to the combustion of the gas at the induction needle 60. Therefore, the sensing needle 60 can better detect the combustion temperature.
  • the second fire row 40 is located adjacent to the first fire row 10
  • the induction needle 60 is located adjacent to the ignition needle 30.
  • the local gas concentration near the induction needle 60 and the ignition needle 30 is relatively high. Larger, more conducive to the ignition and combustion of the gas at the local position.
  • the positions of the first windshield 20 and the second windshield 50 are also close to each other.
  • the first windshield 20 and the second windshield 50 are integrated, that is, a first vent hole 210 corresponding to the first injection inlet 120 and a second vent hole corresponding to the second injection inlet can be opened on the same plate body 220 respectively.
  • the first windshield 20 and the second windshield 50 will only reduce the air injection at the first fire row 10 and the second fire row 40 Increase the gas concentration at the ignition and induction positions.
  • the air injection amount of the remaining fire rows will not change, that is, the first fire row 10 and the second fire row 40 have a limited impact on the entire burner 1, so that it will not be affected by the first fire.
  • the change of the air injection amount in the row 10 and the second fire row 40 causes a defect that the nitrogen oxides generated after the combustion of the burner 1 increase.
  • This application also proposes a gas water heater including a burner.
  • the specific structure of the burner refers to the above embodiments. Since the gas water heater uses all the technical solutions of all the above embodiments, it has at least the technology of the above embodiments. All technical effects brought by the solution will not be repeated here.

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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)

Abstract

一种燃烧器（1）及燃气热水器。该燃烧器（1）包括第一火排（10）、点火针（30）和第一挡风板（20）。第一火排（10）具有第一引射通道（110）、以及分别位于第一引射通道（110）两端的第一喷火部（130）和第一引射入口（120）。点火针（30）临近第一喷火部（130）设置。第一挡风板（20）位于第一引射入口（120）处，第一挡风板（20）具有与第一引射入口（120）相对应设置的第一通气孔（210），第一通气孔（210）的径向尺寸小于第一引射入口（120）的径向尺寸。

Description

燃烧器及燃气热水器
相关申请
本申请要求2018年12月10日申请的，申请号为201811508252.X，名称为“燃烧器及燃气热水器”的中国专利申请的优先权，在此将其全文引入作为参考。
技术领域
本申请涉及燃气具技术领域，特别涉及一种燃烧器及燃气热水器。
 背景技术
燃烧器是燃气热水器、燃气壁挂炉一列燃气产品的关键部件，其中，为了实现燃烧时氮氧化物的低排放，燃烧器通常采用水冷式结构，且要求一次空气进风量大形成淡燃烧，但这样的结构设计会导致燃气浓度不足，存在点火不可靠的问题，从而导致燃烧器点火不着、发生爆燃现象。
 技术解决方案
本申请的主要目的是提出一种燃烧器，旨在通过降低点火针处火排的空气引射量，从而提高了点火针处的燃气浓度，以实现燃气的可靠点火。
为实现上述目的，本申请提出的燃烧器，包括：
第一火排，具有第一引射通道、以及分别位于所述第一引射通道两端的第一喷火部和第一引射入口；
点火针，临近所述第一喷火部设置；
第一挡风板，位于所述第一引射入口处，所述第一挡风板具有与所述第一引射入口相对应设置的第一通气孔，所述第一通气孔的径向尺寸小于所述第一引射入口的径向尺寸。
优选地，所述第一引射入口的数量为多个，且至少一所述第一引射入口处设有所述第一挡风板。
优选地，所述第一火排具有多个所述第一引射通道，多个所述第一引射通道均与所述第一喷火部连通，所述第一引射入口与所述第一引射通道呈一一对应设置。
优选地，所述第一挡风板包括板本体和自所述板本体朝一侧延伸的连接折边，所述连接折边固定于所述第一火排；
所述板本体盖合所述第一引射入口，所述板本体上对应所述第一引射入口的位置开设有所述第一通气孔。
优选地，所述第一喷火部具有多个第一喷火孔，所述第一喷火部上设有朝靠近所述点火针方向延伸的感应挡片，所述感应挡片至少部分围绕多个所述第一喷火孔中的至少一个设置，所述感应挡片靠近所述点火针的一端呈尖状设置。
优选地，所述感应挡片面向所述点火针的端部与所述第一喷火孔的最小间距为6mm~7mm。
优选地，所述燃烧器还包括：
第二火排，所述第二火排与所述第一火排呈并行设置，所述第二火排具有第二引射通道、以及分别位于所述第二引射通道两端的第二喷火部和第二引射入口；
感应针，靠近所述第二喷火部设置；以及
第二挡风板，位于与所述第二引射入口处，所述第二挡风板具有与所述第二引射入口相对应设置的第二通气孔，所述第二通气孔的径向尺寸小于所述第二引射入口的径向尺寸。
优选地，所述第二火排临近所述第一火排设置。
优选地，所述第一挡风板和所述第二挡风板为一体设置。
本申请还提出一种燃气热水器，包括燃烧器，所述燃烧器包括：
第一火排，具有第一引射通道、以及分别位于所述第一引射通道两端的第一喷火部和第一引射入口；
点火针，临近所述第一喷火部设置；
第一挡风板，位于所述第一引射入口处，所述第一挡风板具有与所述第一引射入口相对应设置的第一通气孔，所述第一通气孔的径向尺寸小于所述引射入口的径向尺寸。
本申请技术方案通过在第一火排的一引射入口处设置第一挡风板，减少了第一火排的空气引射量，从而降低了混合燃气中空气的比例，即相对提高了混合燃气中燃气的浓度，从而当点火针对混合燃气进行点火时，更容易将混合燃气点燃，避免了点火过程中产生点火爆燃、火焰熄灭等现象，改善了点火的可靠性。
 附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图示出的结构获得其他的附图。
图1为本申请燃烧器一实施例的结构示意图；
图2为图1中A处的局部放大图；
图3为图1中燃烧器的俯视图；
图4为图3中B处的局部放大图；
图5为图1中燃烧器的仰视图；
图6为图5中C处的局部放大图；
图7为图1中燃烧器中第一火排的结构示意图；
图8为图7中第一火排的俯视图；
图9为图7中第一火排的另一视角的结构示意图。
附图标号说明：
标号 名称 标号 名称
1 燃烧器 120 第一引射入口
10 第一火排 130 第一喷火部
20 第一挡风板 131 第一喷火孔
30 点火针 140 感应挡片
40 第二火排 210 第一通气孔
50 第二挡风板 220 板本体
60 感应针 230 连接折边
110 第一引射通道 510 第二通气孔
本申请目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
 本发明的实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请的一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
需要说明，若本申请实施例中有涉及方向性指示（诸如上、下、左、右、前、后……），则该方向性指示仅用于解释在某一特定姿态（如附图所示）下各部件之间的相对位置关系、运动情况等，如果该特定姿态发生改变时，则该方向性指示也相应地随之改变。
另外，若本申请实施例中有涉及“第一”、“第二”等的描述，则该“第一”、“第二”等的描述仅用于描述目的，而不能理解为指示或暗示其相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。另外，全文中出现的“和/或”的含义为，包括三个并列的方案，以“A和/或B”为例，包括A方案、或B方案，或A和B同时满足的方案。另外，各个实施例之间的技术方案可以相互结合，但是必须是以本领域普通技术人员能够实现为基础，当技术方案的结合出现相互矛盾或无法实现时应当认为这种技术方案的结合不存在，也不在本申请要求的保护范围之内。
本申请提出一种燃烧器，适用于燃气热水器、燃气壁挂炉等一类的燃热装置。下面以燃气热水器为例，对燃烧器做以具体阐释：
在本申请一实施例中，参照图1至图6，并结合图7至9，该燃烧器1包括：
第一火排10，具有第一引射通道110、以及分别位于所述第一引射通道110两端的第一喷火部130和第一引射入口120；
点火针30，临近所述第一喷火部130设置；
第一挡风板20，位于所述第一引射入口120处，所述第一挡风板20具有与所述第一引射入口120相对应设置的第一通气孔210，所述第一通气孔210的径向尺寸小于所述第一引射入口120的径向尺寸。
不失一般性，燃烧器1包括多个呈并行排列的火排，火排具有引射通道、喷火部和引射入口，其中喷火部和引射入口分别位于引射通道的两端，燃气和空气自引射入口进入引射通道，燃气和空气在引射通道内混合，所形成的混合燃气从喷火部喷出燃烧。喷火部通常位于火排的上端，引射入口位于火排的下端，引射入口具体可以位于火排的下端面或者火排的侧壁处，此处不做具体限定。
第一火排10是上述多个火排中最靠近点火针30的一个，即点火针30对应第一火排10的第一喷火部130设置。其中，为了便于点火针30的点火，该点火针30临近第一喷火部130设置。对应地，该第一火排10具有第一引射通道110、第一喷火部130和第一引射入口120。
点火针30可采用电子点火（压电陶瓷电火花点火）或脉冲连续点火的方式实现，点火针30可将从第一喷火部130处的混合燃气点燃，从而实现燃气的点火燃烧。
设置第一挡风板20的目的在于：减少第一火排10的空气引射量，从而降低混合燃气中空气的比例，即相对提高了混合燃气中燃气的浓度，从而当点火针30对混合燃气进行点火时，更容易将混合燃气点燃，避免了点火过程中产生点火爆燃、火焰熄灭等现象，改善了点火的可靠性。其中，为了降低第一火排10的空气引射量，该第一挡风板20的第一通气孔210的径向尺寸小于第一引射入口120的径向尺寸，从而相对减弱了第一引射入口120的引射效果，使得空气进入第一引射入口120的引射量降低。
参照图7，并结合图3至图6，对于该第一火排10而言，其下端所设置的第一引射入口120的数量可以为多个，此时，至少一第一引射入口120处设有第一挡风板20。可以理解的是，当第一引射入口120设置有三个时，可以在三个第一引射入口120处同时设置有第一挡风板20，来同时减少三个第一引射入口120的空气引射量；或者，可以在是三个第一引射入口120中的任意两个处设置有第一挡风板20；或者，该可以在是三个第一引射入口120中的一个处设置第一挡风板20。由于第一挡风板20的存在，必然会减少整个第一火排10的空气引射量，即减少了整个第一火排10内的混合燃气的空气比例，使得混合燃气中燃气浓度相对增大，改善了点火的可靠性。
值得说明的是，第一火排10的第一引射入口120设置有多个，而第一火排10的第一引射通道110可以是一个或多个。当第一火排10仅具有一个第一引射通道110时，此时，第一引射通道110的下端设有多个与其分别连通的第一引射入口120；当第一火排10具有多个第一引射通道110时，多个第一引射通道110之间相互独立，使得第一火排10的混合燃气量增大，从而有利于增强燃烧强度。
本实施例中，参照图7，并结合图3至图6，该第一火排10优选具有多个第一引射通道110，并且多个引射通道均与第一喷火部130连通，引射入口与引射通道呈一一对应设置。在一具体实施方案中，该第一火排10具有三个第一引射通道110和三个第一引射入口120，三个引射通道沿水平方向呈并行排布。
在燃烧器1工作时，第一火排10的温度较高，该第一挡风板20优选为耐高温材料所制成。为了便于第一挡风板20的安装，该第一挡风板20优选为钣金件，从而可通过焊接方式固定于第一火排10上。
进一步地，第一挡风板20包括板本体220和自板本体220朝一侧延伸的连接折边230，连接折边230固定于所述第一火排10；
板本体220盖合于第一引射入口120，板本体220上对应第一引射入口120的位置开设有第一通气孔210。
其中，连接折边230采用焊接方式固定于第一火排10上，从而将第一挡风板20可靠地固定在第一火排10上。板本体220位于第一火排10的下端，并且板本体220盖合第一引射入口120，板本体220上设置第一通气孔210的结构相当于是缩小了第一引射入口120的径向尺寸，从而使得第一引射入口120处的引射效果减弱，即减少了经第一引射入口120进入第一引入通道内的空气量，相对提高了混合燃气的燃气浓度，更利于燃气的可靠点火。
连接折边230优选是通过板本体220的边缘翻折而成的，为了便于连接折边230的弯曲翻折，该连接折边230上靠近板本体220的位置可开设有缺口，从而以减少连接折边230与板本体220的连接处的连接面积。
为了进一步提高点火针30的点火效果，在本实施例中，还可以在第一火排10上设置感应挡片140，感应挡片140为导电体，感应挡边上对应点火针30设置有尖状突出物，通过尖状突出物与点火针30之间产生尖端放电现象，从而提高了点火效果。
具体的，对于第一火排10而言，其第一喷火部130具有多个第一喷火孔131，第一喷火部130上设有朝靠近点火针30方向延伸的感应挡片140，感应挡片140至少部分围绕多个第一喷火孔131中的至少一个设置，感应挡片140靠近点火针30的一端呈尖状设置。
可以理解的是，感应挡片140靠近点火针30的一端呈尖状设置，从而可与点火针30之间产生尖端放电现象；感应挡片140围绕第一喷火孔131设置，从而感应挡边可将第一喷火孔131喷出的混合气体进行汇聚，从而使得尖端放电处的混合气体浓度更高，更利于混合气体的点火引燃。
在一些具体实施方案中，该感应挡片140面向点火针30的端部与第一喷火孔131的最小间距优选为6mm~7mm，从而使得混合燃气的点火位置不至于太靠近第一喷火孔131，从而避免燃烧火焰过于靠近第一喷火孔131而导致的回火现象。
进一步地，在上述燃烧器1中，多个火排中还包括第二火排40，该第二火排40具有第二引射通道、以及分别位于第二引射通道两端的第二喷火部和第二引射入口。其中，该第二火排40的结构与第一火排10的结构可以是类似相同的，也可以是完全不同的，此处不作具体限定。
在本实施例中，对于上述燃烧器1而言，其第二火排40的结构优选与第一火排10的结构类似，其区别在于：第二火排40上未设置有感应挡片140。具体地，上述燃烧器1还包括：
感应针60，靠近第二喷火部设置；以及
第二挡风板50，位于与第二引射入口处，第二挡风板50具有与第二引射入口相对应设置的第二通气孔，第二通气孔的径向尺寸小于第二引射入口的径向尺寸。
具体的，上述感应针60可以采用热电偶或热敏元件作为感温部件，进而实现对燃烧温度的检测。第二挡风板50的工作原理与第一挡风板20类似，通过设置第二挡风板50可提高第二引射通道内混合燃气的燃气浓度，更利于感应针60处燃气的燃烧，以便于感应针60能够更好地对燃烧温度进行检测。
进一步地，在一优选实施例中，第二火排40临近第一火排10设置，此时感应针60临近点火针30设置，此时在感应针60和点火针30附近的局部燃气浓度较大，更利于该局部位置的燃气点火和燃烧。
由于第一火排10和第二火排40彼此相互靠近，此时第一挡风板20和第二挡风板50的位置也彼此靠近，为了简化燃烧器1的结构，第一挡风板20和第二挡风板50为一体设置，即可在同一板本体220上分别对应第一引射入口120开设第一通气孔210、对应第二引射入口开设第二通气孔。
值得说明的是，参照图3，对于本燃烧器1而言，该第一挡风板20和第二挡风板50仅会降低第一火排10和第二火排40处的空气引射量，使得点火和感应位置处的燃气浓度增大。而对于整个燃烧器1而言，其余火排的空气引射量不会发生变化，即第一火排10和第二火排40对整个燃烧器1的影响有限，从而不会因为第一火排10和第二火排40中空气引射量的变化而导致燃烧器1燃烧后产生的氮氧化物增多的缺陷发生。
本申请还提出一种燃气热水器，该燃气热水器包括燃烧器，该燃烧器的具体结构参照上述实施例，由于本燃气热水器采用了上述所有实施例的全部技术方案，因此至少具有上述实施例的技术方案所带来的所有技术效果，在此不再一一赘述。
以上所述仅为本申请的优选实施例，并非因此限制本申请的专利范围，凡是在本申请的申请构思下，利用本申请说明书及附图内容所作的等效结构变换，或直接/间接运用在其他相关的技术领域均包括在本申请的专利保护范围内。

Claims (19)

  1. 一种燃烧器，其中，包括：
    第一火排，具有第一引射通道、以及分别位于所述第一引射通道两端的第一喷火部和第一引射入口；
    点火针，临近所述第一喷火部设置；
    第一挡风板，位于所述第一引射入口处，所述第一挡风板具有与所述第一引射入口相对应设置的第一通气孔，所述第一通气孔的径向尺寸小于所述第一引射入口的径向尺寸。
  2. 如权利要求1所述的燃烧器，其中，所述第一引射入口位于所述第一火排的下端面或侧壁处。
  3. 如权利要求1所述的燃烧器，其中，所述点火针为电子点火针或脉冲连续点火针。
  4. 如权利要求1所述的燃烧器，其中，所述第一引射通道的数量为多个，多个所述第一引射通道之间相互独立。
  5. 如权利要求1所述的燃烧器，其中，所述第一引射通道的数量为3个，3个所述第一引射通道沿水平方向呈并行排布。
  6. 如权利要求1所述的燃烧器，其中，所述第一挡风板为耐高温材料所制成。
  7. 如权利要求1所述的燃烧器，其中，所述第一挡风板为钣金件，并焊接固定于所述第一火排。
  8. 如权利要求1所述的燃烧器，其中，所述第一引射入口的数量为多个，且至少一所述第一引射入口处设有所述第一挡风板。
  9. 如权利要求8所述的燃烧器，其中，所述第一火排具有多个所述第一引射通道，多个所述第一引射通道均与所述第一喷火部连通，所述引射入口与所述引射通道呈一一对应设置。
  10. 如权利要求1所述的燃烧器，其中，所述第一挡风板包括板本体和自所述板本体朝一侧延伸的连接折边，所述连接折边固定于所述第一火排；
    所述板本体盖合于所述第一引射入口，所述板本体上对应所述第一引射入口的位置开设有所述第一通气孔。
  11. 如权利要求10所述的燃烧器，其中，所述连接折边通过所述板本体的边缘翻折而成。
  12. 如权利要求11所述的的燃烧器，其中，所述连接折边上靠近所述板本体的位置开设有缺口。
  13. 如权利要求1所述的燃烧器，其中，所述第一喷火部具有多个第一喷火孔，所述第一喷火部上设有朝靠近所述点火针方向延伸的感应挡片，所述感应挡片至少部分围绕多个所述第一喷火孔中的至少一个设置，所述感应挡片靠近所述点火针的一端呈尖状设置。
  14. 如权利要求13所述的燃烧器，其中，所述感应挡片面向所述点火针的端部与所述第一喷火孔的最小间距为6mm~7mm。
  15. 如权利要求1所述的燃烧器，其中，所述燃烧器还包括：
    第二火排，所述第二火排与所述第一火排呈并行设置，所述第二火排具有第二引射通道、以及分别位于所述第二引射通道两端的第二喷火部和第二引射入口；
    感应针，靠近所述第二喷火部设置；以及
    第二挡风板，位于与所述第二引射入口处，所述第二挡风板具有与所述第二引射入口相对应设置的第二通气孔，所述第二通气孔的径向尺寸小于所述第二引射入口的径向尺寸。
  16. 如权利要求15所述的燃烧器，其中，所述感应针采用热电偶或热敏元件作为感温部件。
  17. 如权利要求15所述的燃烧器，其中，所述第二火排临近所述第一火排设置。
  18. 如权利要求15所述的燃烧器，其中，所述第一挡风板和所述第二挡风板为一体设置。
  19. 一种燃气热水器，其中，包括一种燃烧器，所述燃烧器包括：
    第一火排，具有第一引射通道、以及分别位于所述第一引射通道两端的第一喷火部和第一引射入口；
    点火针，临近所述第一喷火部设置；
    第一挡风板，位于所述第一引射入口处，所述第一挡风板具有与所述第一引射入口相对应设置的第一通气孔，所述第一通气孔的径向尺寸小于所述第一引射入口的径向尺寸。
PCT/CN2019/124387 2018-12-10 2019-12-10 燃烧器及燃气热水器 Ceased WO2020119689A1 (zh)

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CN111288445A (zh) 2020-06-16
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