多射流燃气燃烧器 技术领域 Multi-jet gas burner
本发明一种家用燃气 用的燃烧器， 特别是一种多射流燃气燃烧器。 背景技术 The invention relates to a burner for domestic gas, in particular to a multi-jet gas burner. Background technique
现有的燃烧器的引射结构有立式引射结构与横式引射结构以及上进风燃烧器与下进风燃 烧器之分， 但不管是哪种类型的燃烧器， 其均是一个喷嘴对应一根文丘里管。 且目前大多数 的燃烧器是仅设置有一个喷嘴和对应的一根外文丘里管承担整个外环火的供气负荷、 一个喷 嘴和对应的一根内文丘里管承担内环火的供气负荷， 故其燃气量尤其是所需的一次空气量很 难有本质上的提高， 因而热负荷相对较低，较难满足中国家庭特别是中国家庭对爆炒的需要， 尤其是对于上进风燃烧器来说， 相较于下进风燃烧器其在这一点上的不足尤为明显。 再者， 由于不同气源具有各自不同的特性， 现有的燃烧器基本上均是针对某一类型的气源设计的， 如果用户更换气源， 比如将石油液化气更换为人工气时， 必须更换整个燃烧器， 虽然也有文 献报道声称， 通过釆用喷孔参数可调的喷嘴可以达到在更换气源时无需更换燃烧器的目的， 虽然理论上确实可行， 但事实上因存在两方面的问题而难以推广甚至于难以实现， 其一是调 节的幅度非常小， 非专业人员根本无法准确调试喷嘴， 因而对绝大多数用户而言， 很可能是 好事变坏事， 不仅起不到应有的效果， 反而可能因为调试不当而产生燃气浪费等不良后果， 其二是由于现有的燃烧器均仅设置有一个喷嘴和对应的一个文丘里管承担整个外环火的供气 负荷， 而对于每一特定的文丘里管而言， 其所能引射的空气量虽然可随喷嘴喷孔参数的变化 而有所变化， 但变化幅度有限， 因而很难保证所需空气量而难以做到多气通用， 更换气源时 容易出现燃烧器的热效率偏低的缺陷。 The existing ejector structure of the burner has a vertical ejector structure and a horizontal ejector structure, and an upper inlet blaster and a lower blast burner, but regardless of the type of burner, it is a nozzle Corresponds to a venturi tube. At present, most of the burners are provided with only one nozzle and a corresponding outer venturi to bear the gas supply load of the entire outer ring fire, a nozzle and a corresponding inner venturi to bear the gas supply of the inner ring fire. Load, so the amount of gas, especially the required primary air, is difficult to improve substantially, so the heat load is relatively low, it is difficult to meet the needs of Chinese families, especially Chinese families, especially for the upper wind. In terms of the device, its deficiency at this point is particularly noticeable compared to the lower inlet burner. Furthermore, since different gas sources have different characteristics, the existing burners are basically designed for a certain type of gas source. If the user replaces the gas source, such as replacing petroleum liquefied gas with artificial gas, it must Replacing the entire burner, although it has been reported in the literature that the nozzle with adjustable nozzle parameters can be used to replace the burner without changing the burner. Although it is theoretically feasible, there are two problems. It is difficult to promote or even difficult to achieve. First, the adjustment is very small. Non-professionals can't accurately debug the nozzle. Therefore, for most users, it is likely that good things will become bad things, and not only will not have the desired effect. On the contrary, it may cause adverse effects such as gas waste due to improper commissioning. The second reason is that the existing burners are only provided with one nozzle and a corresponding venturi to bear the gas supply load of the entire outer ring fire, and for each For a particular venturi, the amount of air it can ignite can vary with nozzle orifice parameters. Changes, but the change rate is limited, it is difficult to ensure the required amount of air is difficult to achieve multiple common gas, low thermal efficiency of the burner prone to defect replacement air.
近年还出现了一类多喷嘴多文丘里管燃烧器， 其大多采用立式文丘里管， 其中， 一个喷 嘴和对应的一根文丘里管承担内环火的供气负荷， 而外环火的供气负荷则由多个喷嘴和多根 文丘里管承担， 但文丘里管与喷嘴之间仍为一一对应关系， 也就是说， 一根文丘里管只对应 一个喷嘴，一个喷嘴也只对应一根文丘里管，还可以说是一根文丘里管内只有一股燃气射流。 该类型燃烧器在热负荷上有所提高， 但是在调节幅度以适应不同气源、 引射能力以及燃烧效 率等方面仍有不足。
发明内容 In recent years, there have also been a class of multi-nozzle multi-venturi burners, most of which use vertical venturi tubes, in which one nozzle and the corresponding venturi tube bear the air supply load of the inner ring fire, while the outer ring fire The gas supply load is carried by a plurality of nozzles and a plurality of venturi tubes, but there is still a one-to-one correspondence between the venturi tube and the nozzle, that is, one venturi tube corresponds to only one nozzle, and one nozzle only corresponds to one. A venturi can also be said to be a gas jet in a venturi. This type of burner has an increase in thermal load, but there are still deficiencies in adjusting the amplitude to accommodate different gas sources, ejector capabilities, and combustion efficiency. Summary of the invention
本发明所要解决的主要技术问题是在于针对现有技术现状而提供一种引射能力强、 热负 荷大且燃烧效率高的多射流燃气燃烧器。 The main technical problem to be solved by the present invention is to provide a multi-jet gas burner with strong ejector capability, large heat load and high combustion efficiency against the state of the art.
为解决上述技术问题， 本发明采用下述技术方案： In order to solve the above technical problems, the present invention adopts the following technical solutions:
本发明多射流燃气燃烧器， 其具有一根或一根以上的文丘里管及喷嘴， 其特征在于所述 文丘里管中至少有一根文丘里管配置有至少 2个喷嘴。 The multi-jet gas burner of the present invention has one or more venturi tubes and nozzles, characterized in that at least one venturi of the venturi is provided with at least two nozzles.
本发明多射流燃气燃烧器的一个优选方案是： 所述文丘里管的数目为一根， 文丘里管则 配置有 2~10个喷嘴， 优选为配置 5个喷嘴。 A preferred embodiment of the multi-jet gas burner of the present invention is: the number of venturi tubes is one, and the venturi tube is provided with 2 to 10 nozzles, preferably 5 nozzles.
本发明多射流燃气燃烧器的另一个优选方案是： 所述文丘里管的数目为两根， 其中对应 于内圈火的文丘里管配置有 1个喷嘴， 而对应于外环火的文丘里管则配置有 2〜5个喷嘴。 Another preferred embodiment of the multi-jet gas burner of the present invention is: the number of the venturi tubes is two, wherein the venturi corresponding to the inner ring fire is provided with one nozzle, and the venturi corresponding to the outer ring fire The tube is equipped with 2 to 5 nozzles.
本发明多射流燃气燃烧器的再一个优选方案是： 所述文丘里管的数目为两根， 其中对应 于内圈火的文丘里管和对应于外环火的文丘里管均配置有 2~5个喷嘴， 优选为均配置 2个喷 嘴。 A further preferred embodiment of the multi-jet gas burner of the present invention is: the number of the venturi tubes is two, wherein the venturi tube corresponding to the inner ring fire and the venturi tube corresponding to the outer ring fire are arranged 2~ It is preferable that five nozzles are provided with two nozzles.
本发明多射流燃气燃烧器中的文丘里管既可以采用立式文丘里管， 也可以采用卧式文丘 里管。 The venturi tube in the multi-jet gas burner of the present invention can be either a vertical venturi or a horizontal venturi.
对于采用立式文丘里管的情形， 还可将燃烧器设计成如下的完全上进风结构： 所述喷嘴安装在一朝上开口的碗形基座的底部， 该基座适配在所述文丘里管下部外周且 其底部一体成型有进气管， 进气管的出气口即安装有所述的喷嘴； 基座的上部外周还向外延 伸有用于将燃烧器安装至燃气灶上的搁板， 且该搁板上部空间中留有容一次空气进入基座内 的一次空气入口和便于二次空气进入和溢液流出的出入口。 更具体的结构是： 所述文丘里管 由燃烧器的内圈混气室的下方通往内圈混气室且与燃烧器的内圈混气室、 外环混气室为一体 件， 并且在内圈混气室与文丘里管交接处设有至少一个连通外环混气室的燃气通道； 内圈混 气室的下部外周向外延伸有溢流板， 溢流板的外侧与外环混气室的内侧壁的向下延伸部分连 为一体， 且该向下延伸部分处开设有所述的出入口； 所述基座的上沿与所述溢流板之间留有 所述的一次空气入口。 该结构的燃烧器， 其二次空气和溢液流出使用同一通道， 一次空气则 从另一通道进入， 从而实现燃烧所需的所有空气均由燃烧器头部上方进入， 釆用该燃烧器组 装的燃气灶底盘面板均无需开进风口， 可实现底盘内完全封闭。 烹调时溢液可自溢流板、 搁 板直接流入承液盘， 而不会流入燃气灶底盘内， 清洗时无需动用工具， 极其方便。 In the case of a vertical venturi, the burner can also be designed as a complete upper air intake structure: the nozzle is mounted at the bottom of an upwardly open bowl-shaped base, the base being fitted to the venturi The outer circumference of the lower tube is integrally formed with an intake pipe at the bottom thereof, and the nozzle of the intake pipe is mounted with the nozzle; the upper periphery of the upper portion of the base further extends a shelf for mounting the burner to the gas stove, and A primary air inlet for allowing primary air to enter the base and an inlet for facilitating secondary air ingress and outflow are left in the space on the shelf. More specific structure is: the venturi is connected from the lower side of the inner ring mixing chamber of the burner to the inner ring mixing chamber and integrated with the inner ring mixing chamber and the outer ring mixing chamber of the burner, and At least one gas passage connecting the outer ring mixing chamber is provided at the intersection of the inner ring mixing chamber and the venturi tube; the outer periphery of the inner ring mixing chamber has an overflow plate extending outwardly, and the outer and outer rings of the overflow plate a downwardly extending portion of the inner side wall of the mixing chamber is integrally connected, and the downwardly extending portion is provided with the inlet and outlet; the upper edge of the base and the overflow plate are left once Air inlet. In the burner of this structure, the secondary air and the overflow flow use the same passage, and the primary air enters from the other passage, so that all the air required for combustion is entered from above the burner head, and the burner is assembled by the burner. The gas stove chassis panel does not need to be opened into the air outlet, which can completely close the chassis. During cooking, the overflow can flow directly from the overflow plate and the shelf into the liquid receiving tray without flowing into the bottom of the gas stove. It is extremely convenient to use without cleaning tools.
1、 本发明燃烧器在一个文丘里管内配置 2个或 2个以上的喷嘴， 根据热负荷大小设定 2 个或 2个以上（2, 3， 4个…… n个）喷嘴， 大大缩短文丘里管的长度， 在同一个文丘里管内 有多股燃气射流与一次空气能更加充分的混合， 引射能力增强， 从而提高了燃烧效率。 假设 传统的单通道（单个引射管）燃烧器的液化气、天然气的引射管长度为 Ll， 人工气的引射管 长度为 L2， 则它们的长度差为 A L=L1-L2， 而本发明燃烧器有 2个或 2个以上喷嘴， 假设为 5个， 在相同的压力， 总负荷， 气源情况下， 喷嘴所射出的射流距离缩短， 相应所对应的引 射管缩短为液化气、 天然气 L1',人工气 L2'， 那么前后两者之间的长度差为 A L'=L1'-L2'= (Ll-L2)/5,从以上这个式子可以看出， 两者之间的差距缩短为原来的 1/5， 换而言之， 喷嘴孔 数达到无穷大时， 前后两者的差距缩短为零， 那么两者的引射效果也就相差无几。 现将以上 喷嘴聚集到同一引射管中， 引射能力大大增强， 多个喷嘴射出的气流互相交错， 一次空气和 燃气混合更趋充分。 The invention has the following beneficial effects: 1. The burner of the present invention has two or more nozzles arranged in one venturi tube, and two or more nozzles (2, 3, 4 ... n) are set according to the heat load, which greatly shortens the number of nozzles. The length of the inner tube, in the same venturi tube, multiple gas jets can be more fully mixed with the primary air, and the ejector ability is enhanced, thereby improving the combustion efficiency. Assuming that the length of the liquefied gas of a conventional single-channel (single ejector tube) burner and the length of the natural gas is L1, and the length of the ejector of the artificial gas is L2, the difference in length is AL=L1-L2, and Invented burners have two or more nozzles, assuming five, at the same pressure, total load, gas source, the jet distance emitted by the nozzle is shortened, and the corresponding ejector tube is shortened to liquefied gas, Natural gas L1', artificial gas L2', then the length difference between the two is A L'=L1'-L2'= (Ll-L2)/5, as can be seen from the above formula, between the two The gap is shortened to 1/5 of the original. In other words, when the number of nozzle holes reaches infinity, the difference between the front and the back is shortened to zero, so the ejector effect of the two is almost the same. Now the above nozzles are gathered into the same ejector tube, the ejector capability is greatly enhanced, the airflows from multiple nozzles are interlaced, and the air and gas mixture is more fully mixed.
2、 可实现更大的调节幅度， 以满足三气通用 （只需要更换喷嘴即可） 的要求。 2, can achieve a larger adjustment range, to meet the requirements of three gas universal (only need to replace the nozzle).
3、 热负荷大， 烟气低， 效率高 （气源更换后仍能保持设计效率)， 能满足中国家庭爆炒 需要。 3, large heat load, low smoke, high efficiency (still maintain design efficiency after gas source replacement), can meet the needs of Chinese family stir-fry.
4、 在结构上， 结构紧凑， 简易易实现。 附图说明 4. In structure, compact structure, easy to implement. DRAWINGS
图 1 为本发明实施例一的结构示意图； 1 is a schematic structural view of Embodiment 1 of the present invention;
图 2 为本发明实施例二的结构示意图； 2 is a schematic structural view of Embodiment 2 of the present invention;
图 3 为本发明实施例三的结构示意图。 具体实施方式 FIG. 3 is a schematic structural diagram of Embodiment 3 of the present invention. detailed description
以下结合附图实施例对本发明作进一步详细描述。 The invention will be further described in detail below with reference to the embodiments of the drawings.
如图 1所示意， 为本发明的一个较佳实施例。 如图 1所示， 本实施例多射流燃气燃烧器 具有内圈混气室 1及配套的内环火盖 2、外环混气室 3及配套的外环火盖 4、文丘里管 5及配 套的喷嘴 6等。 由图可见， 本实施例燃烧器采用单根立式文丘里管， 文丘里管 5的下方配置 有 5个喷嘴 6。 该文丘里管 5由燃烧器的内圈混气室 1的下方通往内圈混气室 1且与燃烧器 的内圈混气室 1、 外环混气室 3为一体件， 并且在内圈混气室 1与文丘里管 5交接处设有一 个连通外环混气室 3的燃气通道 7; 内圈混气室 1的下部外周向外延伸有溢流板 8, 溢流板 8
的外侧与外环混气室 3的内侧壁的向下延伸部分连为一体， 且该向下延伸部分处开设有便于 二次空气进入和溢液流出的出入口 9;燃烧器的下部为一朝上开口的碗形基座 10，基座 10适 配在文丘里管 5下部外周且其底部一体成型有进气管 11，进气管 11的出气口安装有所述的 5 个喷嘴 6; 基座 10的上沿与所述溢流板 8之间留有容一次空气进入基座 10内的一次空气入 口 12; 基座 10的上部外周还向外延伸有用于将燃烧器安装至燃气灶上的搁板 13。 安装燃烧 器时， 只需将燃烧器的搁板 13搁置在承液盘上，而承液盘则搁置在燃气灶面板上即可。烹调 时溢液可自溢流板 8、 搁板 13直接流入承液盘， 而不会流入燃气灶底盘内， 清洗时无需动用 工具， 极其方便。 同时， 燃烧所需的所有空气均由燃烧器头部上方的一次空气入口 12、 出入 口 9进入，故采用该燃烧器组装的燃气灶底盘面板均无需开进风口，可实现底盘内完全封闭。 实施例二 As illustrated in Figure 1, a preferred embodiment of the present invention. As shown in FIG. 1 , the multi-jet gas burner of the embodiment has an inner ring mixing chamber 1 and a matching inner ring fire cover 2 , an outer ring mixing chamber 3 and a supporting outer ring fire cover 4 , a venturi tube 5 and Matching nozzle 6 and so on. As can be seen from the figure, the burner of the present embodiment employs a single vertical venturi, and five nozzles 6 are disposed below the venturi 5. The venturi 5 is connected from the lower side of the inner ring mixing chamber 1 of the burner to the inner ring mixing chamber 1 and is integrated with the inner ring mixing chamber 1 and the outer ring mixing chamber 3 of the burner, and A gas passage 7 communicating with the outer ring mixing chamber 3 is provided at the intersection of the ring mixing chamber 1 and the venturi tube 5; an outer side of the lower portion of the inner ring mixing chamber 1 has an overflow plate 8 extending therefrom, and the overflow plate 8 The outer side is integrally connected with the downwardly extending portion of the inner side wall of the outer ring mixing chamber 3, and the downwardly extending portion is provided with an inlet and outlet 9 for facilitating secondary air inflow and overflow outflow; the lower portion of the burner is An upper open bowl-shaped base 10, the base 10 is fitted to the outer periphery of the lower portion of the venturi 5 and has an intake pipe 11 integrally formed at the bottom thereof, and the air outlet of the intake pipe 11 is mounted with the five nozzles 6; There is a primary air inlet 12 between the upper edge and the overflow plate 8 for allowing primary air to enter the base 10; the upper periphery of the base 10 further extends outwardly for mounting the burner to the gas stove Board 13. When installing the burner, it is only necessary to place the shelf 13 of the burner on the liquid tray, and the liquid tray is placed on the gas stove panel. During cooking, the overflow can flow directly from the overflow plate 8 and the shelf 13 into the liquid receiving tray without flowing into the gas stove bottom plate, and it is extremely convenient to use without cleaning tools. At the same time, all the air required for combustion enters from the primary air inlet 12 and the inlet and outlet 9 above the burner head. Therefore, the gas stove chassis panel assembled by the burner does not need to open the air inlet, so that the chassis can be completely closed. Embodiment 2
如图 2所示意，本实施例多射流燃气燃烧器具有内环火盖 2、外环火盖 4、外环混气室 3、 二次空气入口 14、文丘里管及喷嘴 6等。由图可见，本实施例燃烧器采用两根卧式文丘里管， 其中一根为供应内圈火燃气的内文丘里管 15， 其配置有 1个喷嘴 6， 另一根为供应外环火燃 气的外文丘里管 16， 其配置有 2个喷嘴 6。 实施例三 As shown in Fig. 2, the multi-jet gas burner of the present embodiment has an inner ring fire cover 2, an outer ring fire cover 4, an outer ring mixing chamber 3, a secondary air inlet 14, a venturi tube and a nozzle 6 and the like. As can be seen from the figure, the burner of the present embodiment uses two horizontal venturi tubes, one of which is an inner venturi 15 for supplying inner ring fire gas, which is provided with one nozzle 6, and the other is for supplying outer ring fire. The gas-external venturi 16 is provided with two nozzles 6. Embodiment 3
如图 3所示意，本实施例多射流燃气燃烧器具有内环火盖 2、外环火盖 4、外环混气室 3、 二次空气入口 14、文丘里管及喷嘴 6等。由图可见，本实施例燃烧器采用两根卧式文丘里管， 其中一根为供应内圈火燃气的内文丘里管 15， 其配置有 2个喷嘴 6， 另一根为供应外环火燃 气的外文丘里管 16， 其也配置有 2个喷嘴 6。
As shown in Fig. 3, the multi-jet gas burner of the present embodiment has an inner ring fire cover 2, an outer ring fire cover 4, an outer ring mixing chamber 3, a secondary air inlet 14, a venturi tube and a nozzle 6, and the like. As can be seen from the figure, the burner of the present embodiment uses two horizontal venturi tubes, one of which is an inner venturi 15 for supplying inner ring fire gas, which is provided with two nozzles 6, and the other is for supplying an outer ring fire. The gas-external venturi 16 is also provided with two nozzles 6.