Combustor and gas stove

Abstract

The invention discloses a combustor and a gas stove. The combustor comprises a furnace end, a fire cover, an ignition needle, an induction needle and a fluid machine, the furnace end is provided with a first containing cavity, a second containing cavity and a third containing cavity, the fire cover covers the furnace end and comprises an outer ring fire cover, an inner ring fire cover and a gas conveying channel, the outer ring fire cover is provided with outer ring fire holes communicated with the first containing cavity, the inner ring fire cover is provided with inner ring fire holes communicated with the third containing cavity, and the gas conveying channel is communicated with the second containing cavity. The outer ring fire cover surrounds the inner ring fire cover, a clamping cavity is formed between the outer ring fire cover and the inner ring fire cover, the gas conveying channel is communicated with the second containing cavity, the tip end of the ignition needle is arranged in the clamping cavity and is not higher than the gas outlet end of the gas conveying channel, the tip end of the induction needle is arranged in the clamping cavity and is not higher than the gas outlet end of the gas conveying channel, and the fluid machine is suitable for providing blast air for the second containing cavity. The blast air can flow out of the air conveying channel to be supplemented to the flame roots of the inner ring fire holes and / or the outer ring fire holes, and due to the fact that the air outlet end of the air conveying channel is higher, interference of the blast air exhausted from the air conveying channel to ignition and fire sensing is reduced.

Description

Technical Field

[0001] This application relates to the field of gas stove technology, and in particular to a burner and a gas stove. Background Technology

[0002] When a gas stove is working, the gas flows out of the nozzle through the gas valve, becoming high-speed, low-pressure gas that enters the burner. Simultaneously, it mixes with some air, known as primary air. This mixture is ejected from the burner holes and ignited by the ignition device to form a flame. During combustion, secondary air is supplied from the environment to ensure complete combustion. Currently, primary and secondary air participate in the reaction through the high-speed jet of the gas and buoyancy. Achieving complete combustion through the replenishment of primary and secondary air is very challenging, and thermal efficiency needs improvement. Summary of the Invention

[0003] This application aims to at least partially solve one of the technical problems in the related art. To this end, this application proposes a burner.

[0004] To achieve the above objectives, this application discloses a burner comprising:

[0005] A burner head, the burner head having a first cavity, a second cavity and a third cavity;

[0006] A flame cover is provided on the furnace head. The flame cover includes an outer ring flame cover, an inner ring flame cover, and a gas supply channel. The outer ring flame cover has an outer ring flame hole that communicates with the first cavity. The inner ring flame cover has an inner ring flame hole that communicates with the third cavity. The outer ring flame cover surrounds the inner ring flame cover, and a cavity is provided between the outer ring flame cover and the inner ring flame cover. The gas supply channel communicates with the second cavity.

[0007] Ignition needle, the tip of which is located in the clamp cavity and not higher than the outlet end of the gas delivery channel;

[0008] A sensing needle, the tip of which is located in the clamping cavity and not higher than the outlet end of the air supply channel; and

[0009] Fluid machinery, adapted to supply blown air into the second cavity.

[0010] In some embodiments of this application, there are multiple gas delivery channels, which are arranged alternately along a direction surrounding the center of the flame cap.

[0011] In some embodiments of this application, the gas supply channel includes interconnected gas supply holes and gas supply annular seams. There are multiple gas supply holes, which are arranged alternately along the direction surrounding the center of the flame cap and communicate with the second cavity. The gas supply annular seams extend along the direction surrounding the center of the flame cap to form the gas outlet end of the gas supply channel.

[0012] In some embodiments of this application, the fire cover further includes a baffle plate covering the second cavity. The baffle plate is provided with a first vent hole, the second cavity and the first vent hole are connected, and the first vent hole is connected to the gas supply channel.

[0013] In some embodiments of this application, the fire cap further includes a baffle covering the second cavity. The baffle is provided with a second vent hole. The second cavity and the second vent hole are connected. The second vent hole is connected to the clamping cavity. The sum of the flow areas of the second vent holes is less than the sum of the flow areas of the gas delivery channels.

[0014] In some embodiments of this application, one of the outer ring flame cap and the inner ring flame cap is fixed to the baffle, and the other of the outer ring flame cap and the inner ring flame cap is provided with the gas delivery channel.

[0015] In some embodiments of this application, the inner ring fire cover is further provided with an air passage, which connects the third cavity and the clamping cavity.

[0016] In some embodiments of this application, the airflow channel is inclined from bottom to top away from the center of the flame cap.

[0017] In some embodiments of this application, the inner ring flame cap includes a first inner cover body and a second inner cover body surrounding the first inner cover body. The first inner cover body is an infrared flame cap and is provided with the inner ring flame hole, and the second inner cover body is provided with the air passage.

[0018] In some embodiments of this application, the first inner cover is a porous ceramic plate; and / or the second inner cover is made of metal; and / or the outer ring cap is made of metal.

[0019] In some embodiments of this application, the outlet end of the gas supply channel is open away from the center of the flame cap.

[0020] In some embodiments of this application, the second inner cover is provided with the gas delivery channel, the second inner cover is adapted to cover the ignition needle and the sensing needle from top to bottom, and the outer ring cover is adapted to cover the ignition needle and the sensing needle from the outside to the inside.

[0021] In some embodiments of this application, the outer ring fire hole is inclined from bottom to top away from the center of the fire cap.

[0022] In some embodiments of this application, the outer ring fire hole is in the shape of an annular slit.

[0023] In some embodiments of this application, the fluid machinery and the furnace head are fixedly connected.

[0024] In some embodiments of this application, the first cavity is adapted to receive fuel gas and ejector air, and the third cavity is adapted to receive fuel gas and ejector air.

[0025] The second aspect of this application discloses a gas stove, which includes the aforementioned burner.

[0026] The technical solution of this application forms a blower channel by setting a second cavity on the burner head. Blower air can enter the second cavity and flow out from the gas supply channel. The replenishment of blower air is generated by fluid mechanical power, which can more actively replenish the flame root of the inner ring burner hole and / or outer ring burner hole, so that the combustion of gas is more complete, thereby improving thermal efficiency. Since the tip of the ignition needle and the tip of the sensing needle are not higher than the gas outlet end of the gas supply channel, the interference of the blower air discharged from the gas supply channel on the ignition of the ignition needle and the ignition of the sensing needle is reduced, thus minimizing the occurrence of ignition failure and flameout.

[0027] Other advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description or may be learned by practice of this application. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other designs can be obtained based on the structures shown in these drawings without creative effort.

[0029] Figure 1 Schematic diagram of the burner in some embodiments;

[0030] Figure 2 for Figure 1 Enlarged view marked A in the middle;

[0031] Figure 3 Schematic diagram of the burner in some embodiments (view and perspective) Figure 1 different);

[0032] Figure 4 Exploded views of the burner in some embodiments;

[0033] Figure 5 Cross-sectional views of the burner in some embodiments;

[0034] Figure 6 for Figure 5 Enlarged view marked B in the middle;

[0035] Figure 7 Cross-sectional views of the burner in some embodiments (section and...) Figure 5 different);

[0036] Figure 8 for Figure 7 Enlarged view marked C;

[0037] Figure 9 Cross-sectional views of the burner in some embodiments (section and...) Figure 5 , Figure 7 different);

[0038] Figure 10 for Figure 9 Enlarged view marked with D in the middle;

[0039] Figure 11 These are schematic diagrams of partial burner structures in some embodiments;

[0040] Figure 12 This is a schematic diagram of the inner ring flame cap in some embodiments;

[0041] Figure 13 Schematic diagram of the inner ring flame cover in some embodiments (view and angle) Figure 12 different);

[0042] Figure 14 This is a cross-sectional view of the inner ring fire cover in some embodiments;

[0043] Figure 15 for Figure 14 Enlarged view marked E in the middle.

[0044] Explanation of icon numbers:

[0045] Burner head 1000, first cavity 1100, second cavity 1200, third cavity 1300, burner cap 2000, outer ring burner cap 2100, outer ring fire hole 2110, inner ring burner cap 2200, first inner cover body 2210, inner ring fire hole 2211, second inner cover body 2220, gas supply channel 2230, gas supply hole 2231, gas supply ring seam 2232, gas outlet end 2233, air passage channel 2240, baffle 2300, first air passage hole 2310, second air passage hole 2320, clamping cavity 2400, fluid machinery 3000, ignition needle 4100, induction needle 4200, first ejector tube 5100, third ejector tube 5300.

[0046] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0047] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0048] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0049] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0050] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0051] The first aspect of this application discloses a burner, combined with Figures 1 to 10As shown, in some embodiments, the burner includes a burner head 1000, a flame cap 2000, an ignition needle 4100, an induction needle 4200, and a fluid mechanical component 3000. The burner head 1000 has a first cavity 1100, a second cavity 1200, and a third cavity 1300. The flame cap 2000 is mounted on the burner head 1000 and has a gas supply channel 2230, an outer ring flame cap 2100, and an inner ring flame cap 2200. The outer ring flame cap 2100 has an outer ring flame hole 2110 that communicates with the first cavity 1100. The inner ring flame cap 2200 has an inner ring flame hole 2211 that communicates with the third cavity 1300. The outer ring burner cap 2100 surrounds the inner ring burner cap 2200, and a cavity 2400 is formed between the outer ring burner cap 2100 and the inner ring burner cap 2200. The gas supply channel 2230 is connected to the second cavity 1200. The tip of the ignition needle 4100 is set in the cavity 2400, and the tip of the sensing needle 4200 is set in the cavity 2400. The tip of the ignition needle 4100 is not higher than the gas outlet 2233 of the gas supply channel 2230, and the tip of the sensing needle 4200 is not higher than the gas outlet 2233 of the gas supply channel 2230. The fluid machinery 3000 is used to generate blown air. The blown air is introduced into the second cavity 1200 and discharged from the gas supply channel 2230.

[0052] In this embodiment, a second cavity 1200 is provided on the burner head 1000 to form a blower channel. Blower air can enter the second cavity 1200 and flow out from the gas supply channel 2230. The replenishment of blower air is generated by the power generated by the fluid machinery 3000, which can more actively replenish the flame root of the inner ring flame hole 2211 and / or the outer ring flame hole 2110, so that the combustion of gas is more complete, thereby improving thermal efficiency. Since the tip of the ignition needle 4100 and the tip of the sensing needle 4200 are not higher than the gas outlet 2233 of the gas supply channel 2230, the interference of the blower air discharged from the gas supply channel 2230 on the ignition of the ignition needle 4100 and the ignition of the sensing needle 4200 is reduced, and the occurrence of ignition failure and flameout is minimized.

[0053] Specifically, the burner head 1000 can be a one-piece molded structure or formed by connecting separate parts. The burner head 1000 has a first cavity 1100, a second cavity 1200, and a third cavity 1300. Figure 4 As shown in the furnace head 1000, the first cavity 1100 surrounds the second cavity 1200, the second cavity 1200 surrounds the third cavity 1300, the first cavity 1100 and the second cavity 1200 are arranged with the same wall, and the second cavity 1200 and the third cavity 1300 are arranged with the same wall, which helps to reduce the structural complexity of the furnace head 1000.

[0054] The burner cap 2000 comprises an outer ring burner cap 2100 and an inner ring burner cap 2200. The outer ring burner cap 2100 surrounds the inner ring burner cap 2200. When the burner cap 2000 is placed on the furnace head 1000, the outer ring burner cap 2100 encloses the first cavity 1100, and the inner ring burner cap 2200 encloses the third cavity 1300. The outer ring burner cap 2100 is provided with an outer ring flame hole 2110, and the inner ring burner cap 2200 is provided with an inner ring flame hole 2211. The outer ring flame hole 2110 communicates with the first cavity 1100, and the inner ring flame hole 2211 communicates with the third cavity 1300. It can be understood that the outer ring flame hole 2110 and the inner ring flame hole 2211 here should be understood as structures for gas to flow out, and their shapes can be orifice-like, slit-like, etc. For example, in the attached drawing, the outer ring flame hole 2110 is annularly slit-like, and the inner ring flame hole 2211 is orifice-like. After the gas is introduced into the first chamber 1100, it is ejected from the outer ring flame hole 2110 and ignited to form a flame. Similarly, after the gas is introduced into the third chamber 1300, it is ejected from the inner ring flame hole 2211 and ignited to form a flame. In order to improve the combustion efficiency of the gas ejected from the burner cap 2000, forced air is supplied by the fluid machinery 3000.

[0055] The fluid machinery 3000 is a machine that uses a fluid as a working medium for energy conversion. For example, the fluid machinery 3000 can be a blower, which can force the supply of forced air. The forced air is introduced into the second cavity 1200. Since the clamping cavity 2400 is connected to the gas delivery channel 2230, the forced air will enter the gas delivery channel 2230 and then be discharged from the gas delivery channel 2230. After being discharged from the gas delivery channel 2230, the forced air can supplement the flame root of the outer ring flame hole 2110 and / or the flame root of the inner ring flame hole 2211, thereby improving the combustion efficiency of the gas ejected from the outer ring flame hole 2110 and / or the inner ring flame hole 2211, thus improving the thermal efficiency. The fluid machinery 3000 can be directly connected and fixed to the burner head 1000, which makes it easier to cooperate with the second cavity 1200 and directly supply forced air to the second cavity 1200.

[0056] The following example illustrates the process further: ejecting air and gas from the outer ring burner hole 2110 and ejecting air and gas from the inner ring burner hole 2211.

[0057] The ejected air and fuel gas enter the first cavity 1100, and then are ejected from the first cavity 1100 through the outer ring flame hole 2110, where they are ignited to form a flame. The fuel gas comes from bottled liquefied petroleum gas or pipeline natural gas. The fuel gas is ejected from the nozzle and enters the first cavity 1100. During the fuel gas injection process, air is simultaneously ejected. For air ejection, please refer to relevant technologies. Generally, it is based on the Venturi principle. For example, the burner is equipped with a first ejector tube 5100 connected to the first cavity 1100. The fuel gas is injected into the first ejector tube 5100. During the fuel gas injection process, a negative pressure is formed on the surrounding environment, so that the surrounding air is simultaneously ejected into the first ejector tube 5100 along with the fuel gas injection (this part of the air that enters through the ejection action is the ejected air, which is the primary air). The ejected air and fuel gas enter the first cavity 1100 along with the first ejector tube 5100, mix, and then are ejected from the outer ring flame hole 2110.

[0058] Similarly, the ejected air and combustion gas enter the third chamber 1300, and then are ejected from the third chamber 1300 through the inner ring flame hole 2211, where they are ignited to form a flame. The combustion gas comes from bottled liquefied petroleum gas or pipeline natural gas. The combustion gas is ejected from the nozzle and enters the third chamber 1300. During the combustion gas injection process, air is simultaneously ejected. For air ejection, please refer to relevant technologies. Generally, it is based on the Venturi principle. For example, the burner is equipped with a third ejector tube 5300 connected to the third chamber 1300. The combustion gas is injected into the third ejector tube 5300. During the combustion gas injection process, a negative pressure is formed on the surrounding environment, so that the surrounding air is simultaneously ejected into the third ejector tube 5300 along with the combustion gas injection (this part of the air that enters through the ejection action is the ejected air, which is the primary air). The ejected air and combustion gas enter the third chamber 1300 along with the third ejector tube 5300, mix, and then are ejected from the inner ring flame hole 2211.

[0059] When the ejected air from the outer ring burner 2110 is insufficient to support the combustion of the gas ejected from the outer ring burner 2110, secondary air needs to be replenished. In this embodiment, the second cavity 1200 is connected through the gas supply channel 2230, so that the blower air can be discharged from the gas supply channel 2230. The blower air can provide enough oxygen to replenish the flame root formed by the outer ring burner 2110 and assist the combustion of the gas ejected from the outer ring burner 2110. Compared with the secondary air replenished from the surrounding environment by buoyancy and entrainment, the forced-supply blower air more actively replenishes the flame root of the outer ring burner 2110. With this setting, it is more conducive to the complete combustion of the gas ejected from the outer ring burner 2110 (in this case, the secondary air in the surrounding environment can still participate in the combustion of the gas ejected from the outer ring burner 2110). Similarly, when the ejected air from the inner ring burner 2211 is insufficient to support the combustion of the gas ejected from the inner ring burner 2211, secondary air needs to be replenished. In this embodiment, the second cavity 1200 is connected through the gas supply channel 2230, so that the blower air can be discharged from the gas supply channel 2230. The blower air can provide enough oxygen to replenish the flame root of the inner ring burner 2211 and assist the combustion of the gas ejected from the inner ring burner 2211. Compared with the secondary air replenished from the surrounding environment by buoyancy and entrainment, the forced-supply blower air more actively replenishes the flame root of the inner ring burner 2211. With this setting, it is more conducive to the complete combustion of the gas ejected from the inner ring burner 2211 (in this case, the secondary air in the surrounding environment can still participate in the combustion of the gas ejected from the inner ring burner 2211). Furthermore, compared to the primary air supply (where the blast air and combustion gas are mixed and then ejected within the burner), the blast air supply in this embodiment is secondary air, which makes it less likely for the flame in the outer ring burner hole 2110 and / or the flame in the inner ring burner hole 2211 to experience flame lift-off.

[0060] It is understood that the ignition of the gas requires an ignition needle 4100. The tip of the ignition needle 4100 is positioned in the clamping cavity 2400, thereby igniting the gas within the clamping cavity 2400. Ignition of the ignition needle 4100 involves releasing an electric spark to ignite the gas. In this embodiment, the tip of the ignition needle 4100 is designed to be no higher than the gas outlet 2233 of the gas delivery channel 2230, meaning the highest point of the tip of the ignition needle 4100 is no higher than the highest point of the gas outlet 2233 of the gas delivery channel 2230. For example, the ignition needle 41... The highest point of the tip of the ignition needle 4100 is level with the highest point of the outlet end 2233 of the gas supply channel 2230, or the highest point of the tip of the ignition needle 4100 is lower than the highest point of the outlet end 2233 of the gas supply channel 2230, or the highest point of the tip of the ignition needle 4100 is lower than the lowest point of the outlet end 2233 of the gas supply channel 2230. By setting it in this way, the influence of the blower air discharged from the outlet end 2233 of the gas supply channel 2230 on the gas to be ignited by the ignition needle 4100 can be reduced, thereby improving the ignition efficiency. Similarly, maintaining the combustion state of the burner requires sensing the flame through the sensing needle 4200. Since the tip of the sensing needle 4200 is located in the clamping cavity 2400, it senses the flame within the clamping cavity 2400. In this embodiment, the tip of the sensing needle 4200 is designed not to be higher than the outlet end 2233 of the gas supply channel 2230, that is, the highest point of the tip of the sensing needle 4200 is not higher than the highest point of the outlet end 2233 of the gas supply channel 2230. For example, the highest point of the tip of the sensing needle 4200 and the gas supply channel... The highest point of the outlet end 2233 of the air supply channel 2230 is level with the highest point of the outlet end 2233 of the air supply channel 2230, or the highest point of the tip of the sensing needle 4200 is lower than the lowest point of the outlet end 2233 of the air supply channel 2230. This arrangement reduces the impact of the forced-air air discharged from the outlet end 2233 of the air supply channel 2230 on the flame sensed by the ignition needle 4100 (e.g., suppressing the flickering of the sensed flame), effectively preventing flameout. Furthermore, by placing the tips of the ignition needle 4100 and the sensing needle 4200 in the clamping cavity 2400, the outer ring burner cap 2100 and the inner ring burner cap 2200 also protect the ignition needle 4100 and the sensing needle 4200, reducing the probability of them being bumped or knocked by external objects.

[0061] In some embodiments, there are multiple gas supply channels 2230, which are arranged alternately along the direction surrounding the center of the burner cap 2000. In this way, in the direction surrounding the center of the burner cap 2000, the blower air can be discharged through the gas supply channels 2230, which increases the contact area with the gas ejected from the outer ring burner hole 2110 and / or the gas ejected from the inner ring burner hole 2211, which is more conducive to improving combustion efficiency.

[0062] Of course, the following approach can also be adopted, combined with... Figures 5 to 10 ,as well as Figures 12 to 15 As shown, in some embodiments, the gas supply channel 2230 includes a gas supply hole 2231 and a gas supply annular seam 2232. The gas supply hole 2231 and the gas supply annular seam 2232 are connected. There are multiple gas supply holes 2231, which means two or more. The multiple gas supply holes 2231 are arranged alternately along the direction surrounding the center of the flame cap 2000. The gas supply annular seam 2232 extends along the direction surrounding the center of the flame cap 2000. One end of the gas supply hole 2231 is connected to the second cavity 1200 and the other end is connected to the gas supply annular seam 2232 (the gas supply annular seam 2232 is located downstream of the gas supply hole 2231). The gas supply annular seam 2232 constitutes the gas supply channel. The outlet end 2233 of 2230 has an open structure for the gas supply ring slit 2232. The blown air entering the second cavity 1200 can flow through the gas supply hole 2231 and the gas supply ring slit 2232 in sequence after entering the gas supply channel 2230, and finally be discharged from the gas supply ring slit 2232. Since the gas supply ring slit 2232 extends along the direction surrounding the center of the burner cap 2000, the blown air can form a continuous airflow in the direction surrounding the center of the burner cap 2000. Compared with the previous scheme, this is more conducive to increasing the contact area with the gas ejected from the outer ring burner hole 2110 and / or the gas ejected from the inner ring burner hole 2211, thereby further improving the combustion efficiency.

[0063] Combination Figures 4 to 11 As shown, in some embodiments, the flame cap 2000 further includes a baffle 2300, which covers the second cavity 1200. The baffle 2300 is provided with a first vent hole 2310, which communicates with the second cavity 1200 and the first vent hole 2310, which is connected to the gas delivery channel 2230. The baffle 2300 effectively blocks the forced-air entering the second cavity 1200. Furthermore, the first vent hole 2310 on the baffle 2300 allows forced-air to exit through the first vent hole 2310 and enter the gas delivery channel 2230, where it is transported and discharged to replenish the flame root of the outer ring flame hole 2110 and / or the flame root of the inner ring flame hole 2211. For example, when the outer ring burner cap 2100 is assembled to the burner head 1000, it covers the first cavity 1100. By setting a baffle 2300, the baffle 2300 covers the second cavity 1200. When the inner ring burner cap 2200 is assembled, the inner ring burner cap 2200 covers the third cavity 1300. At the same time, the air inlet end of the gas supply channel 2230 abuts against the baffle 2300 and is aligned with the first air passage 2310. In this way, the blown air can pass from the second cavity 1200 through the first air passage 2310 and enter the gas supply channel 2230.

[0064] Combination Figures 5 to 11As shown, in some embodiments, the flame cap 2000 further includes a baffle 2300, which covers the second cavity 1200. The baffle 2300 is provided with a second vent 2320, which communicates with the second cavity 1200 and the clamping cavity 2400. By providing the second vent 2320, the forced air entering the second cavity 1200 can also pass through the second vent 2320 and enter the clamping cavity 2400. It can be understood that since the tips of the ignition needle 4100 and the sensing needle 4200 are located in the clamping cavity 2400, a flame is formed in the clamping cavity 2400, that is, there is combustion of gas in the clamping cavity 2400. By providing the second vent 2320, forced air enters the clamping cavity 2400 to supplement the root of the flame in the clamping cavity 2400, which is conducive to the complete combustion of gas in the clamping cavity 2400. It is worth noting that, in order to prevent the blown air from entering the clamping cavity 2400 through the second vent 2320 and affecting the gas / flame in the clamping cavity 2400, in this embodiment, the sum of the flow areas of the second vent 2320 is less than the sum of the flow areas of the gas supply channels 2230 (or in other words, the sum of the flow areas of the second vent 2320 is less than the sum of the flow areas of the first vent 2310). This ensures that most / high-flow-rate blown air is discharged through the gas supply channels 2230 and replenishes the flame root of the outer ring flame hole 2110 and / or the flame root of the inner ring flame hole 2211, while a small portion / low-flow-rate blown air enters the clamping cavity 2400 through the second vent 2320 and replenishes the flame root of the clamping cavity 2400. This is beneficial for flame generation in the clamping cavity 2400, as well as for ignition and flame sensing.

[0065] Combination Figure 4As shown, in some embodiments, one of the outer ring burner cap 2100 and the inner ring burner cap 2200 is fixed to the baffle 2300, and the other of the outer ring burner cap 2100 and the inner ring burner cap 2200 is provided with a gas supply channel 2230. This arrangement helps to reduce the number of parts during assembly and facilitates the cooperation between the baffle 2300 and the gas supply channel 2230. When the outer ring burner cap 2100 and the baffle 2300 are fixed, the baffle 2300 can cover the second cavity 1200 when the outer ring burner cap 2100 is placed on the burner head 1000. After the inner ring burner cap 2200 is assembled into the burner head 1000, the cooperation between the gas supply channel 2230 and the baffle 2300 can be achieved. When the inner ring burner cap 2200 and the baffle 2300 are fixed together, the baffle 2300 covering the second cavity 1200 is achieved when the inner ring burner cap 2200 is placed over the burner head 1000. After the outer ring burner cap 2100 is assembled into the burner head 1000, the gas supply channel 2230 and the baffle 2300 are properly matched. For example, the outer ring burner cap 2100 and the baffle 2300 are fixed together as one component, and the inner ring burner cap 2200 is also a component with a gas supply channel 2230. Removing or installing the burner cap 2000 only requires two operations. It is understood that the aforementioned fixing can be achieved through connection methods such as screws, or the two components can be integrally formed.

[0066] Combination Figures 7 to 10 as well as Figures 12 to 13 As shown, in some embodiments, the inner ring flame cap 2200 also has an air passage 2240, which connects the third cavity 1300 and the clamping cavity 2400. By setting the air passage 2240, the ignition of the ignition needle 4100 and the sensing of the ignition needle 4200 are realized.

[0067] Specifically, in this embodiment, the inner ring burner cap 2200 is provided with a flow channel 2240. The gas entering the third cavity 1300, in addition to being ejected from the inner ring burner hole 2211, also enters the clamping cavity 2400 along the flow channel 2240 (e.g., the mixture of ignited air and gas is ejected from both the inner ring burner hole 2211 and the flow channel 2240). Since the ignition needle 4100 is located in the clamping cavity 2400, when the gas enters the clamping cavity 2400 from the flow channel 2240, it is ignited by the ignition needle 4100 to form a flame. The flame is then transmitted to the outer ring burner hole 2110 and the inner ring burner hole 2211, thereby igniting the gas ejected from the outer ring burner hole 2110 and the inner ring burner hole 2211 to form a flame. Simultaneously, the flame formed in the clamping cavity 2400 is sensed by the sensing needle 4200, thus maintaining the combustion state. Understandably, the ignition needle 4100 is positioned on the exhaust path of the air passage 2240, which makes it easier to ignite the gas discharged from the air passage 2240 to form a flame. The sensing needle 4200 is also positioned on the exhaust path of the air passage 2240, which makes it easier to contact the flame and achieve ignition.

[0068] Furthermore, combined Figure 8 and Figure 10 As shown, the air passage 2240 is inclined from bottom to top away from the center of the burner cap 2000. It can be understood that after the gas enters the third cavity 1300, it flows from bottom to top. By inclining the air passage 2240 from bottom to top away from the center of the burner cap 2000, it is easier for the gas to be discharged from the air passage 2240 to the clamp cavity 2400.

[0069] Combination Figure 1 , Figure 2 , Figure 5 , Figure 6 as well as Figures 12 to 15As shown, in some embodiments, the inner ring flame cap 2200 includes a first inner cover 2210 and a second inner cover 2220. The second inner cover 2220 surrounds the first inner cover 2210. The first inner cover 2210 is provided with the aforementioned inner ring flame hole 2211 and is an infrared flame cap. The second inner cover 2220 is provided with the aforementioned air passage 2240 (when the gas supply passage 2230 is provided in the inner ring flame cap 2200, the gas supply passage 2230 can be provided in the second inner cover 2220). By surrounding the first inner cover 2210 with the second inner cover 2220, the second inner cover 2220 and the first inner cover 2210 can be combined together, and the second inner cover 2220 provides support for the first inner cover 2210. The first inner cover 2210 is an infrared flame cap, which can achieve infrared combustion (the whole body is red when in combustion). For example, the first inner cover 2210 is a porous ceramic plate to form an infrared flame cap. When the first inner cover 2210 is an infrared flame cap, its flame hole heat intensity is small, which can achieve fully premixed infrared combustion, which is conducive to improving combustion efficiency, reducing the demand for secondary air, and even eliminating the need to supplement secondary air. In this way, the blower air does not need to be supplemented to the flame root of the inner ring flame hole 2211.

[0070] Furthermore, in some embodiments, the second inner cover 2220 is made of metal, such as copper, stainless steel, or iron. This allows the combustion of the gas ejected from the air passage 2240 to be atmospheric combustion. Similarly, the outer ring flame cap 2100 can also be made of metal, such as copper, stainless steel, or iron. This allows the combustion of the gas ejected from the outer ring flame hole 2110 to be atmospheric combustion. Generally, when the first inner cover 2210 is an infrared flame cap, its combustion power is relatively lower than that of the metal outer ring flame cap 2100. By combining different materials, both the combustion power of the burner and the complete combustion of the gas can be ensured. Moreover, because the second inner cover 2220 is made of metal, the flame formed in the clamping cavity 2400 exhibits a certain degree of movement (such as drifting out of the clamping cavity 2400), making ignition easier.

[0071] Combination Figure 5 and Figure 6 As shown, in some embodiments, the outlet end 2233 of the gas supply channel 2230 is open away from the center of the flame cap 2000. Since the first inner cover 2210 is an infrared flame cap, fully premixed infrared combustion can be achieved without the need to replenish secondary air. By opening the outlet end 2233 of the gas supply channel 2230 away from the center of the flame cap 2000, the blown air can be more accurately replenished to the flame root of the outer ring flame hole 2110.

[0072] Furthermore, in some embodiments, the second inner cover 2220 is provided with the aforementioned gas delivery channel 2230. Along the radial direction of the burner cap 2000, the outer ring burner cap 2100 blocks the ignition needle 4100 and the sensing needle 4200 from the outside in. The so-called "from the outside in" means from the direction away from the center of the burner cap 2000 towards the center of the burner cap 2000 along the radial direction of the burner cap 2000. And along the axial direction of the burner cap 2000, the inner ring burner cap 2200 blocks the ignition needle 4100 and the sensing needle 4200 from top to bottom. Through this arrangement, the ignition needle 4100 and the sensing needle 4200 are hidden, which further improves the protection performance of the ignition needle 4100 and the sensing needle 4200, effectively preventing the tip of the ignition needle 4100 and the tip of the sensing needle 4200 from being contaminated, thereby ensuring the sensitivity of use. It is understood that in some embodiments, a single needle is used to achieve both the ignition and sensing functions. Such a single needle can be considered to include an ignition needle 4100 and a sensing needle 4200, such as an ion ignition sensing needle.

[0073] Combination Figures 5 to 8 As shown, in some embodiments, the outer ring flame hole 2110 is inclined from bottom to top away from the center of the flame cap 2000, which is beneficial for forming a large-area flame. Optionally, the outer ring flame hole 2110 is annular, for example, the outer ring flame hole 2110 is circular, so that gas is ejected along the circumference of the outer ring flame cap 2100. In this way, the flame formed in the clamping cavity 2400 can increase the contact area between the flame ejected from the annular flame hole 2110, which is beneficial for improving the success rate of ignition.

[0074] The second aspect of this application also discloses a gas stove, combined with Figures 1 to 15As shown, the gas stove includes the aforementioned burner, which includes a burner head 1000, a burner cap 2000, an ignition needle 4100, a sensing needle 4200, and a fluid mechanical component 3000. The burner head 1000 has a first cavity 1100, a second cavity 1200, and a third cavity 1300. The burner cap 2000 is mounted on the burner head 1000 and has an outer ring burner cap 2100 and an inner ring burner cap 2200. The outer ring burner cap 2100 is provided with an outer ring flame hole 2110, which communicates with the first cavity 1100. The inner ring burner cap 2200 is provided with an inner ring flame hole 2211, which communicates with the third cavity 1300. The outer ring burner cap 2100 surrounds the inner ring burner cap 2200, and a cavity 2400 is formed between the outer ring burner cap 2100 and the inner ring burner cap 2200. The gas supply channel 2230 is connected to the second cavity 1200. The tip of the ignition needle 4100 is set in the cavity 2400, and the tip of the sensing needle 4200 is set in the cavity 2400. The tip of the ignition needle 4100 is not higher than the gas outlet 2233 of the gas supply channel 2230, and the tip of the sensing needle 4200 is not higher than the gas outlet 2233 of the gas supply channel 2230. The fluid machinery 3000 is used to generate blown air, which is introduced into the second cavity 1200 and discharged from the gas supply channel 2230.

[0075] In this embodiment, a second cavity 1200 is provided on the burner head 1000 to form a blower channel. Blower air can enter the second cavity 1200 and flow out from the gas supply channel 2230. The supply of blower air is generated by the fluid machinery 3000, which can more actively supply the flame root of the inner ring burner hole 2211 and / or the outer ring burner hole 2110, making the combustion of gas more complete, thereby improving thermal efficiency. Since the tips of the ignition needle 4100 and the sensing needle 4200 are not higher than the gas outlet 2233 of the gas supply channel 2230, the interference of the blower air discharged from the gas supply channel 2230 on the ignition of the ignition needle 4100 and the ignition of the sensing needle 4200 is reduced, minimizing the occurrence of ignition failure and flameout. It is understood that the burner of the gas stove in this embodiment adopts the technical solution of the above embodiment, and therefore has at least the beneficial effects brought by the technical solution of the above embodiment, which will not be repeated here.

[0076] The above description is merely a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A burner, characterized in that, The burner includes: A burner head (1000) having a first cavity (1100), a second cavity (1200) and a third cavity (1300); A flame cover (2000) is installed on the burner head (1000). The flame cover (2000) includes an outer ring flame cover (2100), an inner ring flame cover (2200), and a gas supply channel (2230). The outer ring flame cover (2100) is provided with an outer ring flame hole (2110) communicating with the first cavity (1100). The inner ring flame cover (2200) is provided with an inner ring flame hole (2211) communicating with the third cavity (1300). The outer ring flame cover (2100) surrounds the inner ring flame cover (2200), and a clamping cavity (2400) is provided between the outer ring flame cover (2100) and the inner ring flame cover (2200). The gas supply channel (2230) communicates with the second cavity (1200). Ignition needle (4100), the tip of which is located in the clamp cavity (2400) and not higher than the outlet end (2233) of the gas delivery channel (2230); A sensing needle (4200), the tip of which is located in the clamping cavity (2400) and not higher than the outlet end (2233) of the air supply channel (2230); and Fluid machinery (3000) is adapted to supply blown air to the second cavity (1200).

2. The burner as claimed in claim 1, characterized in that, The number of gas delivery channels (2230) is multiple, and the multiple gas delivery channels (2230) are arranged alternately along the direction surrounding the center of the flame cap (2000).

3. The burner as described in claim 1, characterized in that, The gas supply channel (2230) includes interconnected gas supply holes (2231) and gas supply annular seams (2232). There are multiple gas supply holes (2231), which are arranged alternately along the direction surrounding the center of the flame cap (2000) and communicate with the second cavity (1200). The gas supply annular seams (2232) extend along the direction surrounding the center of the flame cap (2000) to form the gas outlet end (2233) of the gas supply channel (2230).

4. The burner as claimed in claim 1, characterized in that, The flame cap (2000) also includes a baffle (2300) that covers the second cavity (1200). The baffle (2300) is provided with a first vent hole (2310). The second cavity (1200) and the first vent hole (2310) are connected. The first vent hole (2310) is connected to the gas supply channel (2230).

5. The burner as claimed in claim 1, characterized in that, The flame cap (2000) also includes a baffle (2300) that covers the second cavity (1200). The baffle (2300) is provided with a second vent (2320). The second cavity (1200) and the second vent (2320) are connected. The second vent (2320) is connected to the clamping cavity (2400). The sum of the flow areas of the second vent (2320) is less than the sum of the flow areas of the gas supply channel (2230).

6. The burner as described in claim 4 or 5, characterized in that, One of the outer ring flame cap (2100) and the inner ring flame cap (2200) is fixed to the baffle (2300), and the other of the outer ring flame cap (2100) and the inner ring flame cap (2200) is provided with the gas delivery channel (2230).

7. The burner as claimed in claim 1, characterized in that, The inner ring fire cover (2200) is also provided with an air passage (2240), which connects the third cavity (1300) and the clamping cavity (2400).

8. The burner as claimed in claim 7, characterized in that, The air passage (2240) is inclined from bottom to top away from the center of the flame cap (2000).

9. The burner as claimed in claim 7, characterized in that, The inner ring flame cap (2200) includes a first inner cover body (2210) and a second inner cover body (2220) surrounding the first inner cover body (2210). The first inner cover body (2210) is an infrared flame cap (2000) and is provided with the inner ring flame hole (2211). The second inner cover body (2220) is provided with the air passage (2240).

10. The burner as claimed in claim 9, characterized in that, The first inner cover (2210) is a porous ceramic plate; and / or the second inner cover (2220) is made of metal; and / or the outer ring cap (2100) is made of metal.

11. The burner as claimed in claim 9, characterized in that, The outlet end (2233) of the gas supply channel (2230) is open away from the center of the flame cap (2000).

12. The burner as claimed in claim 11, characterized in that, The second inner cover (2220) is provided with the gas delivery channel (2230), and the second inner cover (2220) is adapted to cover the ignition needle (4100) and the sensing needle (4200) from top to bottom, and the outer ring cover (2100) is adapted to cover the ignition needle (4100) and the sensing needle (4200) from the outside to the inside.

13. The burner as claimed in claim 1, characterized in that, The outer ring fire hole (2110) is inclined from bottom to top away from the center of the fire cover (2000); And / or, the outer ring fire hole (2110) is in the shape of an annular slit.

14. The burner as claimed in claim 1, characterized in that, The fluid machinery (3000) and the furnace head (1000) are connected and fixed.

15. The burner as claimed in claim 1, characterized in that, The first cavity (1100) is adapted to receive fuel gas and ejector air, and the third cavity (1300) is adapted to receive fuel gas and ejector air.

16. A gas stove, characterized in that, Includes the burner according to any one of claims 1 to 15.

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