Combustor and gas stove

Abstract

The utility model relates to the technical field of combustors, in particular to a combustor and a gas stove, the combustor comprises a furnace end assembly, a fire cover assembly, an air duct shell and a blast piece, and the furnace end assembly comprises an injection pipe; the fire cover assembly is mounted at the top of the furnace end assembly; the air duct shell is arranged on the outer side of the furnace end assembly, an air preheating cavity is defined between the air duct shell and the furnace end assembly, so that the furnace end assembly preheats air entering the air preheating cavity, and the air preheated by the furnace end assembly enters the injection pipe from an air inlet of the injection pipe; the air blowing piece communicates with an inlet of the air preheating cavity and is used for blowing air into the air preheating cavity. According to the combustor provided by the embodiment of the utility model, the preheated primary air can be provided for the combustor, and the preheated primary air and the fuel gas enter the injection pipe together, so that the energy of the air entering the combustor can be improved, and the energy efficiency of the gas stove is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of burners, and particularly relates to a burner and a gas stove. Background Art

[0002] A burner mixes fuel with air and burns to generate heat energy. As the core component of a gas stove, its design affects the energy efficiency of the gas stove. In related technologies, the heat of a heat collecting disc is used to preheat primary air, which is diverted to the inlet of an ejector tube in an open environment. The preheating effect is not ideal, and the structure of the heat collecting disc is relatively complex. Summary of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems in related technologies to some extent. For this purpose, an object of the utility model is to provide a burner that can make full use of the heat of a burner head assembly to preheat primary air and improve the energy of the air participating in combustion entering the burner.

[0004] Another object of the utility model is to provide a gas stove including the aforementioned burner.

[0005] The burner according to an embodiment of the utility model includes: a burner head assembly, a burner cap assembly, an air duct housing, and a blower. The burner head assembly includes an ejector tube; the burner cap assembly is installed on the top of the burner head assembly; the air duct housing is disposed outside the burner head assembly and defines an air preheating chamber with the burner head assembly, so that the burner head assembly preheats the air entering the air preheating chamber, and the air preheated by the burner head assembly enters the ejector tube from the air inlet of the ejector tube; the blower is communicated with the inlet of the air preheating chamber for blowing air into the air preheating chamber.

[0006] The burner according to an embodiment of the utility model can easily preheat the air in the air preheating chamber by using the heat of the burner head assembly through setting the air duct housing to define the air preheating chamber with the burner head assembly, improve the preheating efficiency of the air, and can provide preheated primary air for the burner by setting the blower. The preheated primary air and gas enter the ejector tube together, which can improve the energy of the air participating in combustion, increase the combustion temperature, and can improve the combustion reaction speed, thereby improving the energy efficiency of the burner.

[0007] In addition, the burner according to the above embodiment of the utility model may further have the following additional technical features:

[0008] In some embodiments, in the extending direction of the ejector tube, the inlet is located at a position of the air duct housing away from the air inlet, and the extending direction of the inlet is arranged at an angle with the extending direction of the ejector tube.

[0009] In some embodiments, the air preheating chamber has an outlet, the outlet communicates with the air inlet of the ejector tube, and the inlet and the outlet are located on the same side of the ejector tube.

[0010] In some embodiments, the burner head assembly further includes a gas distribution seat, the gas distribution seat defines an annular channel, and the air outlet of the ejector tube communicates with the annular channel; wherein, the air preheating chamber includes a first chamber and a second chamber that communicate with each other, the first chamber surrounds the outer periphery of the gas distribution seat, and the second chamber is located below the first chamber and surrounds the outer periphery of the ejector tube.

[0011] In some embodiments, the air duct housing further defines an air passing chamber, the air inlet of the air passing chamber communicates with the air preheating chamber, and the air outlet of the air passing chamber is disposed opposite to and communicates with the air inlet of the ejector tube.

[0012] In some embodiments, the air duct housing includes: a first housing and a second housing, the first housing is disposed on the outer periphery of the burner head assembly and defines the air preheating chamber between the first housing and the burner head assembly; the second housing is disposed on one side of the burner head assembly and is disposed opposite to the air inlet of the ejector tube, and the second housing defines the air passing chamber.

[0013] In some embodiments, a nozzle is connected to the side of the second housing facing the burner head assembly, and the nozzle is disposed at the air inlet of the ejector tube to be disposed opposite to the air outlet.

[0014] In some embodiments, there is one air outlet and the air outlet extends along the circumferential direction of the nozzle; alternatively, the air outlet includes a plurality of air outlet holes and the plurality of air outlet holes are arranged in the circumferential direction of the nozzle.

[0015] In some embodiments, the second housing further defines an air inlet channel, the air inlet channel is spaced apart from the air passing chamber, and the air inlet channel communicates with the nozzle.

[0016] In some embodiments, the second housing includes: an outer shell and an air inlet pipe, both the air inlet and the air outlet are disposed on the outer shell; the air inlet pipe passes through the outer shell, the air inlet pipe defines the air inlet channel and one end of the air inlet pipe is connected to the nozzle, and the outer wall of the air inlet pipe and the inner wall of the outer shell define the air passing chamber.

[0017] In some embodiments, the number of the ejector tubes is at least two, and the nozzle is provided at the air inlet of each ejector tube. The number of the air outlets is at least two and includes a first air outlet and a second air outlet, and the first air outlet and the second air outlet are respectively arranged opposite to the air inlets of the two ejector tubes. Wherein, a wind shield is connected to one side of the second housing facing the burner assembly, and the wind shield is located between the first air outlet and the second air outlet to separate the first air outlet and the second air outlet.

[0018] In some embodiments, the wind shield includes: a first wind shield plate and a second wind shield plate. The first wind shield plate is arranged around the first air outlet and both ends thereof extend in a direction away from the first air outlet. The second wind shield plate is arranged around the second air outlet and both ends thereof extend in a direction away from the second air outlet. Wherein, air inlets communicating with the air inlets of the ejector tubes are defined between both ends of the first wind shield plate and between both ends of the second wind shield plate.

[0019] In some embodiments, the burner assembly defines an installation cavity with an open top, and an igniter and / or a thermocouple are / is installed on the bottom wall of the installation cavity.

[0020] In some embodiments, the installation cavity is located above the air preheating cavity, and ventilation holes are provided on the bottom wall of the installation cavity, and the ventilation holes communicate the air preheating cavity with the installation cavity.

[0021] The gas stove according to an embodiment of the present invention includes the aforesaid burner.

[0022] The gas stove according to an embodiment of the present invention can make full use of the heat of the burner assembly to preheat the air in the preheating cavity, improve the energy of the air participating in combustion entering the burner, increase the combustion temperature, and further improve the energy efficiency of the gas stove.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of the burner according to an embodiment of the present invention.

[0025] Figure 2 is an exploded schematic diagram of the burner according to an embodiment of the present invention.

[0026] Figure 3 is a sectional schematic diagram of the burner according to an embodiment of the present invention.

[0027] Figure 4It is a cross-sectional view of the burner according to an embodiment of the present invention in another direction.

[0028] Figure 5 It is a schematic view of the burner according to an embodiment of the present invention from another angle.

[0029] Figure 6 It is a schematic view of the burner according to an embodiment of the present invention from another angle, in which part of the air duct housing is hidden.

[0030] Figure 7 It is an exploded view of the burner according to an embodiment of the present invention, in which part of the air duct housing is hidden.

[0031] Figure 8 It is a schematic view of the second housing and the nozzle of the burner according to an embodiment of the present invention.

[0032] Figure 9 It is a cross-sectional view of the burner according to another embodiment of the present invention.

[0033] Reference numerals:

[0034] Burner 100, burner head assembly 10, ejector tube 11, air inlet 111, air outlet 112, gas distribution seat 12, annular channel 121, installation cavity 13, ventilation hole 131, fire cap assembly 20, inner fire cap 21, outer fire cap 22, air duct housing 30, air preheating chamber 31, inlet 31a, outlet 31b, first chamber 311, second chamber 312, air passing chamber 32, air inlet 321, air outlet 322, air outlet hole 3221, first air outlet 3222, second air outlet 3223, first housing 33, second housing 34, air intake passage 341, outer shell 342, air inlet pipe 343, wind blocking member 344, first wind blocking plate 3441, second wind blocking plate 3442, air induction port 345, blower member 40, nozzle 50. Detailed implementation manners

[0035] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0036] Combined with Figures 1 to 3, the burner 100 according to an embodiment of the present utility model includes: a burner head assembly 10, a burner cap assembly 20, and an air duct housing 30. The burner head assembly 10 includes an ejector tube 11, and the number of ejector tubes 11 may be one, two, or more. The burner cap assembly 20 is installed on the top of the burner head assembly 10, and the air duct housing 30 is disposed outside the burner head assembly 10 and defines an air preheating chamber 31 between the air duct housing 30 and the burner head assembly 10, so that the burner head assembly 10 preheats the air entering the air preheating chamber 31.

[0037] Specifically, the burner cap assembly 20 may be provided with flame outlets, and the ejector tube 11 can supply fuel gas to the flame outlets on the burner cap assembly 20. When the burner 100 is working, heat is radiated to the burner head assembly 10, and the air entering the air preheating chamber 31 can absorb the heat of the burner head assembly 10. Moreover, the air preheating chamber 31 defined by the air duct housing 30 can improve the preheating efficiency of the air in the air preheating chamber 31 compared with an open environment. The preheated air can enter the ejector tube 11 together with the fuel gas, which can increase the energy of the air participating in combustion entering the burner and improve the energy efficiency of the burner 100.

[0038] Combined Figure 4 , the burner 100 may further include a blower 40, and the blower 40 is communicated with the inlet 31a of the air preheating chamber 31 for blowing air into the air preheating chamber 31. Specifically, the blower 40 blows air into the air preheating chamber 31 through the inlet 31a, and conveys air flow into the air preheating chamber 31 by means of active air blowing. The air flow blown into the air preheating chamber 31 can provide primary air for the burner 100 to promote the full combustion of the fuel.

[0039] Wherein, the blower 40 is connected to the air duct housing 30, and the blower 40 can be connected to the side wall, bottom wall or top wall of the air duct housing 30.

[0040] For the burner 100 according to an embodiment of the present utility model, by providing the air duct housing 30 and the burner head assembly 10 to define the air preheating chamber 31, on the one hand, it is convenient to use the heat of the burner head assembly 10 to preheat the air in the air preheating chamber 31, improve the preheating efficiency of the air, and by providing the blower 40 for active air blowing, it can provide preheated primary air for the burner 100. The preheated primary air and the fuel gas enter the ejector tube 11 together, which can increase the energy of the air entering the burner and thus improve the energy efficiency of the burner 100. On the other hand, it can reduce the heat loss of the burner head assembly 10, realize the recovery and reuse of heat, and thus reduce energy consumption.

[0041] It should be noted that primary air refers to the air that is pre-mixed with the fuel. When the fuel burns, sufficient air is required to promote the full combustion of the fuel.

[0042] Among them, the burner head assembly 10 preheats the air entering the air preheating chamber 31. The preheated air can provide primary air for the burner 100 and can also provide secondary air for the burner 100. Exemplarily, ventilation holes can be provided above the burner head assembly 10, and the preheated air can flow out through the ventilation holes to the burner cap assembly 20 to provide secondary air for the burner cap assembly 20. The preheated secondary air helps to promote the full combustion of the fuel and improve the combustion stability. Among them, secondary air refers to the air additionally introduced during the combustion process in addition to the initial mixture of fuel and air.

[0043] Among them, the air preheating chamber 31 is communicated with the air inlet 111 of the ejector tube 11, and it can be that the air preheating chamber 31 is directly communicated with the air inlet 111 of the ejector tube 11. For example, the side wall of the air preheating chamber 31 is a closed structure except for the inlet 31a and the position of the nozzle 50. The ejector tube 11 is completely arranged in the air preheating chamber 31, and the air inlet 111 of the ejector tube 11 is arranged at an interval from the side wall of the air preheating chamber 31, so that the air inlet 111 of the ejector tube 11 is directly communicated with the air preheating chamber 31.

[0044] Of course, the air preheating chamber 31 and the air inlet 111 of the ejector tube 11 can also be indirectly communicated. Specifically, the air preheating chamber 31 has an outlet 31b, and the outlet 31b of the air preheating chamber 31 can be communicated with the air inlet 111 through a pipeline, so as to divert the air flow in the air preheating chamber 31 to the air inlet 111. It can also be to provide a wind passing chamber, and the air flow in the air preheating chamber 31 can first flow through the wind passing chamber and then flow out to the air inlet 111.

[0045] The burner 100 of the embodiment of the present invention can be applied to gas stoves, etc. By providing the air duct housing 30 and the burner head assembly 10 to define the air preheating chamber 31, and the air blowing member 40 blows air into the air preheating chamber 31 to provide preheated primary air for the burner 100, and the preheated primary air and the gas enter the ejector tube 11 together, which can improve the energy of the air participating in combustion and thus improve the energy efficiency of the gas stove.

[0046] Optionally, the air volume of the air blowing member 40 can be adjusted and can be adjusted according to actual usage requirements. For example, when high firepower is required, the air volume of the air blowing member 40 can be increased to improve the combustion efficiency. When in low fire, the air volume of the air blowing member 40 can be reduced to reduce the energy consumption of the gas equipment. Of course, the start and stop of the air blowing member 40 can also be controlled according to actual usage requirements. For example, when high firepower is required, the air blowing member 40 can be turned on to increase the air volume of the primary air and improve the combustion efficiency. When in low fire, the air blowing member 40 can be turned off to reduce the energy consumption of the gas equipment.

[0047] In some embodiments of the present utility model, in the extending direction of the ejector tube, the inlet 31a of the air preheating chamber 31 is located at a position of the air duct housing 30 away from the air inlet 111 of the ejector tube 11, so that the flow path of the air entering the air preheating chamber 31 is longer and the heat exchange with the burner head assembly 10 is sufficient.

[0048] In addition, the extending direction of the inlet 31a of the air preheating chamber 31 can be set at an angle with the extending direction of the ejector tube 11, that is to say, the air inlet direction of the air preheating chamber 31 is different from the gas inlet direction. Exemplarily, the extending direction of the inlet 31a of the air preheating chamber 31 can have an included angle with the extending direction of the ejector tube 11, and the included angle can be a right angle, an acute angle or an obtuse angle, etc. It can be understood that if the blowing member 40 has the same extending direction as the ejector tube 11, the air flow path is single after the air enters the preheating chamber, which will cause uneven air preheating in the preheating chamber. By setting a certain angle between the air inlet direction and the gas inlet direction, after the air flow enters the air preheating chamber 31, the dynamic pressure decays in the air inlet direction, and the dynamic pressure is converted into static pressure, so that the air flow can be fully preheated in the air preheating chamber 31, thereby improving the preheating efficiency of the air in the air preheating chamber 31.

[0049] Combined with Figure 4 , in some embodiments of the present utility model, the air preheating chamber 31 has an outlet 31b, and the outlet 31b is communicated with the air inlet 111 of the ejector tube 11, and the inlet 31a and the outlet 31b are located on the same side of the ejector tube 11. Exemplarily, the air preheating chamber 31 can be indirectly communicated with the air inlet 111 of the ejector tube 11. For example, it can be communicated through a pipeline or a through-air chamber is provided. By arranging the inlet 31a and the outlet 31b on the same side of the ejector tube 11, the air flow path is optimized, and the air flow enters from the inlet 31a and can flow out through the outlet 31b after being preheated by the burner head assembly 10.

[0050] Preferably, the extending direction of the inlet 31a of the air preheating chamber 31 is perpendicular to the extending direction of the ejector tube 11. Exemplarily, combined with the attached Figure 4 shown, the inlet 31a of the air preheating chamber 31 extends along the A-A direction, and the ejector tube 11 can extend along the B-B direction. Correspondingly, the air preheating chamber 31 admits air along the A-A direction, so that the air flow entering the air preheating chamber 31 can first pass through the burner head assembly 10 and absorb the heat of the burner head assembly 10, and the air preheating chamber 31 can provide primary air for preheating the gas entering the ejector tube 11, and the gas mixed with the primary air enters the ejector tube 11 along the B-B direction.

[0051] In the above technical solution, by arranging the extending direction of the inlet 31a of the air preheating chamber 31 perpendicular to the extending direction of the ejector tube 11, after the air enters the air preheating chamber 31, the air flow can experience rapid dynamic pressure attenuation in the air inlet direction, and most of the dynamic pressure is converted into static pressure, which is convenient for the burner assembly 10 to fully preheat the air flow, and is convenient for the air flow to be evenly mixed with the gas, improving the mixing uniformity of the primary air and the gas. In addition, the inlet 31a and the outlet 31b can be located on the same side of the ejector tube 11, optimizing the air flow path. The air flow enters from the inlet 31a, the air flow can experience rapid dynamic pressure attenuation in the air inlet direction, and after being preheated by the burner assembly 10, it can flow out through the outlet 31b.

[0052] Combined with Figure 3 and Figure 6 , in some embodiments of the present invention, the burner assembly 10 further includes an air distribution base 12. The air distribution base 12 defines an annular channel 121. The air outlet 112 of the ejector tube 11 is communicated with the annular channel 121. Specifically, the gas mixed with the primary air enters the ejector tube 11 from the air inlet 111 of the ejector tube 11, and then flows out from the air outlet 112 of the ejector tube 11 and enters the annular channel 121 of the air distribution base 12. Among them, the air preheating chamber 31 includes a first chamber 311 and a second chamber 312 that are communicated. The first chamber 311 surrounds the outer periphery of the air distribution base 12, and the second chamber 312 is located below the first chamber 311 and surrounds the outer periphery of the ejector tube 11.

[0053] Specifically, the air preheating chamber 31 can be a segmented structure, with a part surrounding the outer periphery of the air distribution base 12 (upper part) and a part surrounding the outer periphery of the ejector tube 11 (lower part). The burner assembly 10 can preheat the air in the first chamber 311, and the preheated air flows through the first chamber 312 and then flows out from the outlet 31b, which can provide preheated primary air for the gas entering the ejector tube 11. The preheated primary air and the gas enter the ejector tube 11 together, which can provide the energy of the air participating in combustion entering the combustion system, increase the combustion temperature, and improve the combustion reaction efficiency.

[0054] It can be understood that during the operation of the burner 100, heat will also be conducted to the ejector tube 11. Therefore, the ejector tube 11 of the burner assembly 10 will also heat the air in the second chamber 312, and the burner assembly 10 will also reheat the primary air and the gas entering from the ejector tube 11, thereby further increasing the combustion temperature and the combustion reaction efficiency.

[0055] In the above technical solution, by setting the air preheating chamber 31 to include a first chamber 311 and a second chamber 312, on the one hand, the contact area between the air entering the air preheating chamber 31 and the burner assembly 10 can be increased, and the contact time between the air and the burner assembly 10 can be extended, thereby significantly increasing the combustion temperature and improving the combustion reaction efficiency.

[0056] Combined with Figure 3 and Figure 4 , in some embodiments of the present invention, the air duct housing 30 further defines an air outlet chamber 32. The air inlet 321 of the air outlet chamber 32 is communicated with the air preheating chamber 31, and the air outlet 322 of the air outlet chamber 32 is oppositely arranged and communicated with the air inlet 111 of the ejector tube 11.

[0057] Specifically, the air preheating chamber 31 and the air outlet chamber 32 are defined in the air duct housing 30, and the air preheating chamber 31 is communicated with the air outlet chamber 32. Combined with Figure 3 and Figure 4 , where the arrow shows the flow direction of the air flow. The air flow enters the air preheating chamber 31 from the inlet 31a, flows through the surface of the burner head and absorbs the heat of the burner assembly 10, and then enters the air outlet chamber 32. In other words, the air flow preheated by the air preheating chamber 31 flows through the air outlet chamber 32 and then flows out from the air outlet 322 to supply primary air to the gas entering the ejector tube 11. By setting the air outlet chamber 32 and the air outlet 322 of the air outlet chamber 32 being oppositely arranged with the air inlet 111 of the ejector tube 11, it is convenient to divert the preheated air to the air inlet 111 to supply primary air to the gas entering the ejector tube 11, so that the primary air and the gas are fully mixed.

[0058] Combined with Figure 5 , in some embodiments of the present invention, the air duct housing 30 may include a first housing 33 and a second housing 34. The first housing 33 is arranged on the outer periphery of the burner assembly 10 and defines the air preheating chamber 31 between it and the burner assembly 10. The air flow entering the air preheating chamber 31 can be preheated by the burner assembly 10; the second housing 34 is arranged on one side of the burner assembly 10 and is oppositely arranged with the air inlet 111 of the ejector tube 11. The second housing 34 defines the air outlet chamber 32, and the air flow preheated by the air preheating chamber 31 first enters the air outlet chamber 32 and then flows out into the ejector tube 11 of the burner head.

[0059] By setting the first housing 33 and the second housing 34, and the first housing 33 and the second housing 34 defining two different chambers, it is convenient for the processing and forming of the air duct housing 30, and it is also convenient to divert the preheated air to the air inlet 111 of the ejector tube 11 to supply primary air to the gas entering the ejector tube 11, so that the primary air and the gas are fully mixed.

[0060] Exemplarily, the first housing 33 and the second housing 34 can be connected through a pipeline. For example, a pipeline can be provided on the first housing 33, and a through hole can be provided on the second housing 34, or a through hole can be provided on the first housing 33, and a pipeline can be provided on the second housing 34. The pipeline passes through the through hole to communicate the air preheating chamber 31 and the air passing chamber 32, and the connection structure of the first housing 33 and the second housing 34 is simple.

[0061] Combined with Figure 4 , further, a nozzle 50 is connected to the side of the second housing 34 facing the burner assembly 10. The nozzle 50 is disposed at the air inlet 111 of the ejector tube 11 and is oppositely arranged with the air outlet 322. The air outlet 322 can eject the primary air heated by the air preheating chamber 31. The nozzle 50 is oppositely arranged with the air outlet 322, which is convenient for the primary air to be mixed with the gas ejected from the nozzle 50 and then enter the ejector tube 11. On the one hand, it can forcibly supplement the primary air for the gas entering the ejector tube 11 to improve the combustion efficiency of the burner 100 and reduce the pollutant emissions caused by incomplete combustion. Moreover, the primary air is preheated air, which can improve the energy of the air participating in combustion entering the ejector tube 11 and increase the combustion temperature, thereby improving the energy efficiency of the gas stove.

[0062] In some embodiments of the present invention, the air outlet 322 is at least one and the air outlet 322 extends along the circumferential direction of the nozzle 50; specifically, the air outlet 322 can be one, or the air outlet 322 can be multiple. Exemplarily, the second housing 34 can be connected with one nozzle 50, the air outlet 322 is one and the air outlet 322 extends along the circumferential direction of the nozzle 50; the second housing 34 can also be connected with two nozzles 50. The air outlet 322 can be one, and the air outlet 322 can extend along the circumferential direction of one of the nozzles 50, or one air outlet 322 surrounds the two nozzles 50, that is to say, one air outlet 322 provides primary air for the gas ejected from the two nozzles 50 at the same time; Combined with Figure 8 , the second housing 34 can be connected with two nozzles 50, and the air outlet 322 can also be two, and each nozzle 50 is correspondingly provided with an air outlet 322. By extending the air outlet 322 along the circumferential direction of the nozzle 50, it is convenient for the airflow of the air outlet 322 to form a surround for the gas ejected from the nozzle 50, which helps the mixing of the gas and the air.

[0063] Wherein, the air outlet 322 extends along the circumferential direction of the nozzle 50, and the air outlet 322 can be configured as an arc shape, a circular ring shape, a square ring shape, etc.

[0064] Combined with Figure 9, in some embodiments of the present utility model, the air outlet 322 includes a plurality of air outlet holes 3221, and the plurality of air outlet holes 3221 are arranged circumferentially around the nozzle 50. Specifically, the air outlet 322 can be provided with a plurality of air outlet holes 3221, and the plurality of air outlet holes 3221 are arranged at intervals along the circumferential direction of the nozzle 50, surrounding the outer periphery of the nozzle 50, capable of forming an enclosure around the nozzle 50. The air flow flowing out of the air outlet holes 3221 and the gas ejected from the nozzle 50 enter the ejector tube 11 together, improving the mixing uniformity of the gas and air, promoting sufficient combustion, reducing pollutant emissions, and improving the energy efficiency level of the gas equipment.

[0065] Combined with Figure 8 and Figure 9 , in some embodiments of the present utility model, the second housing 34 further defines an air intake passage 341, the air intake passage 341 is spaced apart from the air passing cavity 32, and the air intake passage 341 communicates with the nozzle 50. Exemplarily, the air intake passage 341 can be connected to a gas tank, a natural gas pipeline, a fuel valve, etc. The gas flows through the air intake passage 341 to the nozzle 50 and is ejected from the nozzle 50 towards the ejector tube 11.

[0066] Among them, the air intake passage 341 is defined within the second housing 34. Exemplarily, the burner 100 can include an air pipe that penetrates through the second housing 34 to define the air intake passage 341 within the second housing 34; alternatively, there can be an air pipe provided within the second housing 34, in other words, the air pipe is part of the second housing 34. By defining the air intake passage 341 within the second housing 34 and separating the air intake passage 341 from the air passing cavity 32, the structure of the burner 100 is made compact, improving the space utilization rate of the burner 100.

[0067] Combined with Figure 8 , further, the second housing 34 includes an outer housing 342 and an air inlet pipe 343. The air inlet 321 and the air outlet 322 are both provided on the outer housing 342. The air inlet pipe 343 penetrates through the outer housing 342. The air inlet pipe 343 defines the air intake passage 341, and one end of the air inlet pipe 343 is connected to the nozzle 50. The outer wall of the air inlet pipe 343 and the inner wall of the outer housing 342 define the air passing cavity 32. Both ends of the air inlet pipe 343 can extend out of the outer housing 342 to facilitate the connection of one end of the air inlet pipe 343 to an external pipeline and the other end to the nozzle 50, improving the assembly efficiency of the second housing 34. Additionally, the extending direction of the air inlet pipe 343 can be the same as the air outlet direction of the primary air, facilitating the uniform mixing of the primary air and the gas ejected from the nozzle 50. The structure of the second housing 34 is compact and facilitates the mixing of the gas and the primary air.

[0068] Among them, the outer housing 342 and the air inlet pipe 343 can be integrally formed, which can improve the structural strength of the second housing 34. Of course, the air inlet pipe 343 can be assembled to the outer housing 342, facilitating the processing and forming of the second housing 34.

[0069] Combined with Figure 7 , exemplarily, the air duct housing 30 includes a first housing 33 and a second housing 34. Among them, the first housing 33 defines an air preheating chamber 31, and the second housing 34 defines an air passing chamber 32. The outlet 31b of the air preheating chamber 31 communicates with the air inlet 321 of the air passing chamber 32, and the air outlet 322 of the air passing chamber 32 communicates with the air inlet 111 of the ejector tube 11. Furthermore, the communication between the air preheating chamber 31 and the air inlet 111 of the ejector tube 11 is realized, so as to provide preheated primary air for the burner 100 through the air preheating chamber 31. Among them, the outlet 31b of the air preheating chamber 31 and the air inlet 111 of the ejector tube 11 can be located on the same side of the first housing 33, and the air inlet 321 and the air outlet 322 of the air passing chamber 32 can be located on the same side of the second housing 34. The primary air preheated by the air preheating chamber 31 can be drained through the air passing chamber 32 to the air inlet 111 of the ejector tube 11, making the overall structure of the burner 100 compact, improving the mixing uniformity of the primary air and the gas, and being able to increase the combustion temperature.

[0070] Combined with Figure 4 and Figure 8 , in some embodiments of the present utility model, the number of ejector tubes 11 is at least two. A nozzle 50 is provided at the air inlet 111 of each ejector tube 11. The number of air outlets 322 is at least two and includes a first air outlet 3222 and a second air outlet 3223. The first air outlet 3222 and the second air outlet 3223 are respectively arranged opposite to the air inlets 111 of two ejector tubes 11. Among them, a wind blocking member 344 is connected to the side of the second housing 34 facing the burner head assembly 10. The wind blocking member 344 is located between the first air outlet 3222 and the second air outlet 3223 to separate the first air outlet 3222 and the second air outlet 3223. By providing the wind blocking member 344, the mutual interference between the first air outlet 3222 and the second air outlet 3223 can be reduced, and the combustion stability can be improved.

[0071] Exemplarily, the ejector tube 11 may include an inner ring ejector tube and an outer ring ejector tube. The nozzle 50 may include an inner ring nozzle and an outer ring nozzle. The inner ring nozzle is configured to spray gas into the inner ring ejector tube, so as to supply gas to the inner fire holes of the burner cap assembly 20. The outer ring nozzle is configured to spray gas into the outer ring ejector tube, so as to supply gas to the outer fire holes of the burner cap assembly 20. The primary air output from the first air outlet 3222 can be mixed with the gas sprayed by the inner ring nozzle 50, and the primary air output from the second air outlet 3223 can be mixed with the gas sprayed by the outer ring nozzle 50. The gas mixed with the primary air enters the ejector tube 11. Among them, the inner ring nozzle 50 is closer to the air inlet 321 than the outer ring nozzle 50. By providing the wind blocking member 344 between the first air outlet 3222 and the second air outlet 3223, the mutual interference of the primary air supply between the inner and outer rings can be reduced.

[0072] Combined with Figure 8 , further, the wind shield 344 includes: a first wind shield 3441 and a second wind shield 3442. The first wind shield 3441 is arranged around the first air outlet 3222 and both ends extend in a direction away from the first air outlet 3222, which can effectively avoid the interference of the second air outlet 3223 on the first air outlet 3222; the second wind shield 3442 is arranged around the second air outlet 3223 and both ends extend in a direction away from the second air outlet 3223, which can effectively avoid the interference of the first air outlet 3222 on the second air outlet 3223.

[0073] Combined with Figure 6 , wherein, between both ends of the first wind shield 3441 and between both ends of the second wind shield 3442, an air induction port 345 communicating with the air inlet 111 of the induction pipe 11 is defined. The air induction port 345 can communicate with the outside to introduce un-preheated primary air.

[0074] Combined with the foregoing, the burner 100 may include a blower member 40, which can introduce primary air (preheated) for the burner 100, and an air induction port 345 is defined between both ends of the wind shield to provide natural wind (un-preheated) of primary air for the burner 100, so as to facilitate the natural induction of the burner 100. The first wind shield 3441 and the second wind shield 3442 cooperate. On the one hand, it can reduce the mutual interference of the airflows of the first air outlet 3222 and the second air outlet 3223. On the other hand, the air induction port 345 is defined to facilitate the passage of natural wind for the burner 100 to achieve natural induction.

[0075] Combined with Figure 9 , in some embodiments of the present utility model, the burner head assembly 10 defines an installation cavity 13 with a top opening. An ignition member and / or a thermocouple can be installed on the bottom wall of the installation cavity 13. Specifically, the ignition member can be installed on the bottom wall of the installation cavity 13 to improve the structural stability of the ignition member, or the thermocouple is installed on the bottom wall of the installation cavity 13 to improve the structural stability of the thermocouple. It can also be that both the ignition member and the thermocouple are installed on the bottom wall of the installation cavity 13.

[0076] Further, the installation cavity 13 is located above the air preheating cavity 31, and the bottom wall of the installation cavity 13 is provided with ventilation holes 131, and the ventilation holes 131 communicate the air preheating cavity 31 with the installation cavity 13. Among them, the burner cap assembly 20 is installed on the top of the burner head assembly 10, and the ventilation holes 131 can provide preheated secondary air for the burner cap assembly 20 to improve the stability of the flame.

[0077] Combined with Figure 9, Exemplarily, the burner cap assembly 20 may include an inner-ring burner cap and an outer-ring burner cap. Among them, inner-ring burner holes may be provided on the inner-ring burner cap, and outer-ring burner holes may be provided on the outer-ring burner cap. The ventilation hole 131 may be configured to supplement the air for secondary preheating to the inner-ring burner holes, improving the stability of the flame of the inner-ring burner holes. Among them, the arrow indicates the flow direction of the air flowing in from the inlet 31a.

[0078] The gas stove according to an embodiment of the present invention includes the aforementioned burner 100. The air duct housing 30 and the burner head assembly 10 define an air preheating chamber 31, realizing that the air participating in combustion is preheated by the high-temperature burner head before entering the burner 100, improving the energy efficiency of the gas stove.

[0079] The various embodiments / implementations of the present invention can be combined with each other without contradiction.

[0080] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention.

[0081] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0082] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0083] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0084] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0085] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.

Claims

1. A burner (100), characterized in that: include: A furnace head assembly (10), wherein the furnace head assembly (10) comprises an ejector tube (11); A fire cover assembly (20), the fire cover assembly (20) being mounted on the top of the burner head assembly (10); an air duct shell (30), the air duct shell (30) being arranged on the outside of the burner head assembly (10) and defining an air preheating chamber (31) between the air duct shell (30) and the burner head assembly (10), so that the burner head assembly (10) preheats the air entering the air preheating chamber (31), and the air preheated by the burner head assembly (10) enters the ejector tube (11) from the air inlet (111) of the ejector tube; A blowing member (40), the blowing member (40) is communicated with the inlet (31a) of the air preheating chamber (31), and is used for blowing air into the air preheating chamber (31).

2. The burner (100) according to claim 1, characterized in that: In the extension direction of the ejector tube (11), the inlet (31a) is located at a position of the air duct shell (30) away from the air inlet (111), and the extension direction of the inlet (31a) is arranged at an angle to the extension direction of the ejector tube (11); And / or, the air preheating chamber (31) has an outlet (31b), the outlet (31b) is connected to the air inlet (111) of the ejector tube (11), and the inlet (31a) and the outlet (31b) are located on the same side of the ejector tube (11).

3. The burner (100) according to claim 1, characterized in that: The furnace head assembly (10) further comprises a gas distribution seat (12), wherein the gas distribution seat (12) defines an annular channel (121), and the gas outlet (112) of the ejector tube (11) is in communication with the annular channel (121); The air preheating chamber (31) comprises a first chamber (311) and a second chamber (312) which are connected to each other, wherein the first chamber (311) surrounds the outer periphery of the air distribution seat (12), and the second chamber (312) is located below the first chamber (311) and surrounds the outer periphery of the ejector tube (11).

4. The burner (100) according to claim 1, characterized in that: The air duct shell (30) further defines an air passage cavity (32); an air inlet (321) of the air passage cavity (32) is in communication with the air preheating cavity (31); and an air outlet (322) of the air passage cavity (32) is arranged opposite to the air inlet (111) and is in communication with the air inlet (111).

5. The burner (100) according to claim 4, characterized in that: The air duct housing (30) comprises: a first shell (33), the first shell (33) being arranged on the outer periphery of the furnace head assembly (10) and defining the air preheating chamber (31) between the first shell (33) and the furnace head assembly (10); A second shell (34), the second shell (34) is arranged on one side of the furnace head assembly (10) and is arranged opposite to the air inlet (111), and the second shell (34) defines the air passage cavity (32).

6. The burner (100) according to claim 5, characterized in that: A nozzle (50) is connected to a side of the second shell (34) facing the furnace head assembly (10); the nozzle (50) is arranged at the air inlet (111) to be opposite to the air outlet (322).

7. The burner (100) according to claim 6, characterized in that: There is at least one air outlet (322) and the air outlet (322) extends along the circumference of the nozzle (50); or, the air outlet (322) includes a plurality of air outlet holes (3221) and the plurality of air outlet holes (3221) are arranged circumferentially of the nozzle (50).

8. The burner (100) according to claim 6, characterized in that: The second shell (34) further defines an air inlet channel (341), the air inlet channel (341) being separated from the air passage cavity (32), and the air inlet channel (341) being in communication with the nozzle (50).

9. The burner (100) according to claim 8, characterized in that: The second housing (34) comprises: A housing (342), wherein the air inlet (321) and the air outlet (322) are both arranged on the housing (342); An air intake pipe (343), the air intake pipe (343) is arranged through the outer shell (342), the air intake pipe (343) defines the air intake channel (341) and one end of the air intake pipe (343) is connected to the nozzle (50), and the outer wall of the air intake pipe (343) and the inner wall of the outer shell (342) define the air passage cavity (32).

10. The burner (100) according to claim 6, characterized in that: The number of the ejector pipes (11) is at least two, the nozzle (50) is provided at each of the air inlets (111), the number of the air outlets (322) is at least two and includes a first air outlet (3222) and a second air outlet (3223), and the first air outlet (3222) and the second air outlet (3223) are arranged opposite to the two air inlets (111), respectively; Wherein, a wind shield (344) is connected to the side of the second shell (34) facing the furnace head assembly (10), and the wind shield (344) is located between the first air outlet (3222) and the second air outlet (3223) to separate the first air outlet (3222) and the second air outlet (3223).

11. The burner (100) according to claim 10, characterized in that: The wind shield (344) comprises: a first wind shield (3441), the first wind shield (3441) being arranged around the first air outlet (3222) and having two ends extending in a direction away from the first air outlet (3222); a second wind shield (3442), the second wind shield (3442) being arranged around the second air outlet (3223) and having two ends extending in a direction away from the second air outlet (3223); Wherein, an air inlet (345) connected to the air inlet (111) is defined between the two ends of the first wind shield (3441) and between the two ends of the second wind shield (3442).

12. The burner (100) according to any one of claims 1 to 11, characterized in that: The burner head assembly (10) defines a mounting cavity (13) with a top opening, and an ignition element and / or a thermocouple is mounted on the bottom wall of the mounting cavity (13).

13. The burner (100) according to claim 12, characterized in that: The installation cavity (13) is located above the air preheating cavity (31), and a ventilation hole (131) is provided on the bottom wall of the installation cavity (13), wherein the ventilation hole (131) connects the air preheating cavity (31) and the installation cavity (13).

14. A gas stove, characterized in that: It comprises a burner (100) according to any one of claims 1-13.

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