Combustor and gas stove

Abstract

The utility model relates to the technical field of household appliances, and discloses a burner and a gas stove, the burner comprises: a burner, which comprises an injection pipe having a throat and an injection air inlet; the pre-mixer is provided with a pre-mixing cavity, and a pre-mixed gas outlet of the pre-mixing cavity is communicated with the throat through a first nozzle; the air inlet mechanism and the fuel gas conveying mechanism are used for conveying fuel gas and air to the premixing cavity for primary premixing; the first nozzle can spray mixed gas obtained after primary premixing in the premixing cavity into the injection pipe and can drive external air to enter the injection pipe from the injection air inlet to achieve secondary premixing. The kinetic energy of primary premixed gas sprayed out of the first nozzle is large, the injected air also has certain kinetic energy, so that the mixing uniformity of fuel gas and air can be improved, combustion is more sufficient, the combustion efficiency is higher, secondary premixing is carried out in the injection pipe, the internal space of the injection pipe is relatively large, and the combustion efficiency is improved. And the mixing uniformity of the fuel gas and the air can be further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, in particular to a burner and a gas stove. Background Art

[0002] Most of the existing burners of gas stoves adopt premixed combustion. The premixed combustion method means that part of the air is premixed before the gas burns. After being ejected from the burner and ignited, it is mixed and burned with the air again. Although premixed combustion has a fast reaction speed, a high temperature, and a fast flame propagation speed, there are problems of uneven mixing of air and gas, resulting in incomplete combustion of some gas, high emissions of harmful gases, and low combustion efficiency. Summary of the Utility Model

[0003] In view of this, the utility model provides a burner and a gas stove to solve the problem of uneven mixing of gas and air in the existing premixed combustion burner, resulting in incomplete combustion.

[0004] In a first aspect, the utility model provides a burner, comprising:

[0005] A burner head, including an ejector tube, the ejector tube has a throat, and an ejector air inlet is provided on the outer periphery of the throat;

[0006] A premixer, having a premixing chamber, the premixing chamber is provided with a premixed gas outlet, and the premixed gas outlet is communicated with the throat through a first nozzle;

[0007] An air inlet mechanism and a gas delivery mechanism, which are respectively communicated with the premixing chamber, are used for delivering gas and air to the premixing chamber to perform a first premixing in the premixing chamber;

[0008] The first nozzle can spray the mixed gas after the first premixing in the premixing chamber into the ejector tube, and can drive external air to enter the ejector tube from the ejector air inlet to achieve a second premixing.

[0009] Beneficial effect: after the primary premixing of gas and air is achieved by setting an air inlet mechanism and a premixing chamber, the gas and air are sprayed into the ejector tube of the burner through the first nozzle. At the same time, the kinetic energy of the mixed gas formed by spraying gas and air from the first nozzle naturally drives the air around the ejection air inlet to enter the ejector tube from the ejection air inlet, so that the mixed gas of air and gas formed in the premixing chamber can be premixed with the air again in the ejector tube for a second time. Not only does the kinetic energy of the primary premixed gas sprayed by the first nozzle be large, but the injected air also has a certain kinetic energy, thereby improving the uniformity of the mixing of gas and air, making the combustion more complete and the combustion efficiency higher. The secondary premixing is carried out in the ejector tube, and the internal space of the ejector tube is relatively large. The sufficient space can also further improve the uniformity of the mixing of gas and air, effectively solving the problem of uneven premixing of air and gas in the prior art, resulting in incomplete combustion of some gas, high emission of harmful gases and low combustion efficiency.

[0010] In an optional embodiment, the premixer includes a premixing shell having a premixing chamber therein, and the premixing shell is provided with a first mounting port and a second mounting port;

[0011] The air inlet mechanism includes a fan installed at the first installation port, and the gas delivery mechanism includes a second nozzle installed at the second installation port;

[0012] The second nozzle has a gas inlet and a gas outlet. The gas outlet is located in the premixing chamber, and the direction of the gas outlet is consistent with the air outlet direction of the fan.

[0013] Beneficial effect: The gas delivery mechanism adopts the design of the above-mentioned second nozzle, which can make the gas injection into the premixing chamber, further improving the kinetic energy of the gas. The gas sprayed by the second nozzle and the air blown by the fan are premixed in the premixing chamber to form an air-gas mixture. By setting the gas port to be consistent with the flow direction of the air blown by the fan, not only can the phenomenon of the air blown by the fan being backflowed into the gas pipeline due to excessive pressure be avoided, but also the consistency of the gas injection direction with the wind outlet direction of the fan can reduce the impact when the two merge, with less kinetic energy loss, so that the gas and air are mixed more fully and evenly, thereby improving combustion efficiency.

[0014] In an optional embodiment, the first mounting opening is provided on the side wall of the premixing shell, and the second mounting opening is provided on the bottom wall of the premixing shell;

[0015] One end of the second nozzle provided with a gas outlet extends from the first installation opening into the premixing chamber and is located between the fan and the premixing gas outlet. The gas outlet is located on a side of the second nozzle away from the fan.

[0016] Beneficial effects: By setting the first mounting port on the side wall of the premixing housing and the second mounting port on the bottom wall of the premixing housing, the fan and the second nozzle are installed in different orientations of the premixing housing, one on the side and the other on the bottom, which makes the layout and wiring more convenient. And by setting the second nozzle between the fan and the premixed gas outlet, the air blown by the fan can flow through the second nozzle, enabling the gas and air to be fully mixed and burned without dead corners. And by setting the gas outlet on the side of the second nozzle away from the fan, the ejection direction of the gas is consistent with the blowing direction of the fan, avoiding the phenomenon that the air blown by the fan flows back into the gas pipeline due to excessive pressure, and reducing the impact when the two converge, with small kinetic energy loss, making the gas and air mix more fully and evenly and improving the combustion efficiency.

[0017] In an alternative embodiment, the second nozzle includes:

[0018] A nozzle body, including an extending section extending into the premixing chamber and a connecting section located outside the premixing chamber;

[0019] A mounting plate fixedly arranged on the outer wall of the nozzle body. The mounting plate is used to abut and limit against the premixing housing when the extending section extends into the premixing chamber, and is fixed to the premixing housing by screws.

[0020] Beneficial effects: The gas outlet is arranged at the extending section, and the connecting section is located outside the premixing chamber, which is convenient for connecting with components such as a gas ratio valve. Through the mounting plate arranged on the outer wall of the nozzle body, the mounting plate can abut and limit against the premixing housing when the extending section extends into the premixing chamber, thereby forming a positioning. And the mounting plate is provided with connecting holes, and the connecting holes and the premixing housing can be connected by screws to realize the connection and fixation of the second nozzle and the premixing housing, which is convenient for disassembly and assembly.

[0021] In an alternative embodiment, the inlet end of the first nozzle is threadedly connected to the premixed gas outlet, and the outlet end extends into the throat.

[0022] Beneficial effects: The inlet end of the first nozzle is threadedly connected to the premixed gas outlet, which is convenient for disassembly and assembly and has a reliable and stable connection.

[0023] In an alternative embodiment, the premixing chamber includes a main part and a confluence part;

[0024] Along the gas flow direction, the inner diameter of the confluence part gradually decreases from the main part to the direction of the premixed gas outlet.

[0025] Beneficial effects: The premixing chamber is designed with a converging portion whose inner diameter gradually decreases from the main body portion towards the premixing gas outlet. This design facilitates the convergence of the gas and air after the first premixing towards the premixing gas outlet, and can further increase the pressure of the gas at the premixing gas outlet, thereby increasing the impact kinetic energy of the gas ejected from the premixing gas outlet, and further improving the mixing efficiency of the air and gas in the second premixing, making the mixing of the air and gas in the second premixing more uniform and sufficient.

[0026] In an alternative embodiment, the throat and the entrained air inlet are provided on the end wall of the entrainment tube close to the premixer. The burner further includes an air flow regulating mechanism, and the air flow regulating mechanism includes:

[0027] An adjusting flap, rotatably sleeved outside the first nozzle, and an adjusting hole is provided on the adjusting flap;

[0028] An elastic member, disposed between the adjusting flap and the first nozzle or the premixer, and the elastic member is used to apply an elastic force to the adjusting flap to make it closely adhere to the end wall;

[0029] The adjusting flap is driven to rotate to adjust the overlapping area between the adjusting hole and the entrained air inlet, thereby adjusting the air flow rate of the entrained air.

[0030] Beneficial effects: The provided air flow regulating mechanism can adjust the amount of air naturally entrained into the entrainment tube as needed. The air flow regulating mechanism is designed with an adjusting flap, and the adjusting flap can be driven to rotate to adjust the overlapping area between the adjusting hole and the entrained air inlet. When a larger air intake is desired, the overlapping area between the adjusting hole and the entrained air inlet is made larger; conversely, when a smaller air intake is desired, the overlapping area between the adjusting hole and the entrained air inlet is made smaller. The adjustment is very convenient and fast. By using the elastic member, the adjusting flap closely adheres to the end wall of the entrainment tube, avoiding the problem of air leakage and affecting the air flow regulation effect due to the gap between the adjusting flap and the end wall of the entrainment tube.

[0031] In an alternative embodiment, the elastic member is a spring sleeved on the first nozzle;

[0032] An annular boss is provided on the outer periphery of the first nozzle, one end of the spring abuts against the annular boss, and the other end abuts against the adjusting flap.

[0033] Beneficial effects: The elastic member adopts the structural form of a spring sleeved on the first nozzle, with a simple structure and low cost. And through the annular boss provided on the outer periphery of the first nozzle, the spring is compressed and abuts between the annular boss and the adjusting flap, which can make the adjusting flap closely adhere to and be maintained on the end wall of the entrainment tube. The structure is relatively simple, easy to implement, and the disassembly and assembly are also relatively convenient and fast.

[0034] In an alternative embodiment, the premixer is fixedly connected to the burner head by screws and / or snap connection.

[0035] Advantageous effects: The premixer is fixedly connected to the burner head by screws and / or snap connection, which is convenient for disassembly and assembly.

[0036] In a second aspect, the present utility model further provides a gas stove, comprising the burner of any of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0038] Figure 1 Structural schematic diagram of the burner in the embodiment of the present utility model;

[0039] Figure 2 For Figure 1 Partial enlarged view of the burner in

[0040] Figure 3 Explosion diagram of the burner in the embodiment of the present utility model;

[0041] Figure 4 Structural schematic diagram of the air flow regulating mechanism in the embodiment of the present utility model;

[0042] Figure 5 Structural schematic diagram of the first nozzle in the embodiment of the present utility model;

[0043] Figure 6 Structural schematic diagram of the second nozzle in the embodiment of the present utility model;

[0044] Figure 7 Cross-sectional view of the burner in the embodiment of the present utility model;

[0045] Figure 8 For Figure 7 Partial enlarged view of the burner in

[0046] Figure 9 Schematic diagram of the gas flow direction of the burner in the embodiment of the present utility model;

[0047] Figure 10 Cross-sectional view of the premixing housing in the embodiment of the present utility model.

[0048] Explanation of the reference numerals:

[0049] 10. Burner head; 11. Ejector tube; 111. Throat; 112. Ejector air inlet; 12. Fitting connection part

[0050] 20. Premixer; 201. Premixing chamber; 2011. Main body part; 2012. Confluence part; 2010. Premixed gas outlet; 202. Premixed air passage; 21. Premixing housing; 211. First mounting opening; 212. Second mounting opening; 213. Screw connection part

[0051] 30. First nozzle; 31. Annular boss

[0052] 40. Air inlet mechanism

[0053] 50. Second nozzle; 501. Gas inlet; 502. Gas outlet; 51. Nozzle body; 511. Insertion section; 512. Connection section; 52. Mounting plate

[0054] 60. Airflow regulating mechanism; 61. Regulating flap; 610. Regulating hole; 611. Poking rod; 62. Elastic member

[0055] 70. Dividing fire device Detailed implementation manners

[0056] In order to make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0057] Most of the burners of existing gas stoves adopt premixed combustion. Specifically, the premixed combustion mode means that part of the air (i.e., primary air) is premixed with the gas before combustion, and after being ejected from the burner and ignited, it is mixed with air (i.e., secondary air) again for combustion. Although premixed combustion has a fast reaction speed, a high temperature and a fast flame propagation speed, there are problems such as uneven mixing of air and gas, resulting in incomplete combustion of some gas, high emission of harmful gases and low combustion efficiency. It has been found through research that insufficient kinetic energy and limited volume of air and gas during secondary premixing are the main reasons for uneven mixing of air and gas and incomplete combustion.

[0058] The following combines Figures 1 to 10 , to describe the embodiments of the present utility model.

[0059] According to an embodiment of the present utility model, on the one hand, the present utility model provides a burner, which includes a burner head 10, a premixer 20, an air inlet mechanism 40 and a gas delivery mechanism. The burner head 10 includes an ejector tube 11, the ejector tube 11 has a throat 111, and an ejector air inlet 112 is provided on the outer periphery of the throat 111; the premixer 20 has a premixing chamber 201, the premixing chamber 201 is provided with a premixed gas outlet 2010, and the premixed gas outlet 2010 is communicated with the throat 111 through a first nozzle 30; the air inlet mechanism 40 and the gas delivery mechanism are respectively communicated with the premixing chamber 201 for delivering gas and air to the premixing chamber 201 to perform a primary premixing therein; the first nozzle 30 can spray the mixed gas after the primary premixing in the premixing chamber 201 into the ejector tube 11, and can drive the external air to enter the ejector tube 11 from the ejector air inlet 112 to achieve a secondary premixing.

[0060] In the above embodiment, after the gas and air are primarily premixed by setting the air inlet mechanism 40 and the premixing chamber 201, they are sprayed into the ejector tube 11 of the burner head 10 through the first nozzle 30. At the same time, the kinetic energy of the mixed gas formed by spraying the gas and air by the first nozzle 30 naturally drives the air around the ejector air inlet 112 to enter the ejector tube 11 from the ejector air inlet 112, so that the mixed gas of air and gas formed in the premixing chamber 201 can be secondarily premixed with air again in the ejector tube 11. Not only is the kinetic energy of the primarily premixed gas ejected by the first nozzle 30 relatively large, but the entrained air also has a certain kinetic energy, thereby improving the uniformity of the gas and air mixing, making the combustion more complete, the combustion efficiency higher, and the secondary premixing is carried out in the ejector tube 11. The internal space of the ejector tube 11 is relatively large, and the sufficient space can further improve the uniformity of the gas and air mixing, effectively solving the problems in the prior art that the air and gas are premixed unevenly, resulting in incomplete combustion of some gas, high emissions of harmful gases, and low combustion efficiency.

[0061] Specifically, a throat 111 is provided on the side end wall of the ejector tube 11 close to the premixer 20, and the ejector air inlet 112 is arranged around the throat 111. Optionally, the ejector air inlet 112 is an arc-shaped or U-shaped or fan-shaped opening, and the opening area of the ejector air inlet 112 is relatively large, facilitating a large amount of air to be naturally entrained into the ejector tube 11. The first nozzle 30 has a gas passage for the air flow to pass through, and the cross-sectional areas of the throat 111 and the gas passage are much smaller than the cross-sectional area of the premixing chamber 201, so that the pressure of the mixed gas after the primary premixing can rise sharply when flowing through the first nozzle 30, so that the mixed gas can be ejected into the ejector tube 11 with a certain kinetic energy.

[0062] In some embodiments, the premixer 20 includes a premixing housing 21 with a premixing chamber 201 inside. The premixing housing 21 is provided with a first mounting port 211 and a second mounting port 212; the air inlet mechanism 40 includes a blower installed at the first mounting port 211, and the gas delivery mechanism includes a second nozzle 50 installed at the second mounting port 212; the second nozzle 50 has a gas inlet 501 and a gas outlet 502, the gas outlet 502 is located inside the premixing chamber 201, and the orientation of the gas outlet 502 is consistent with the air outlet direction of the blower.

[0063] In the above embodiments, by adopting the design of the second nozzle 50, the gas delivery mechanism can make the gas be injected into the premixing chamber 201, further improving the kinetic energy of the gas. The gas ejected by the second nozzle 50 and the air agitated by the blower are premixed in the premixing chamber 201 to form an air-gas mixture. And by setting the gas port to be consistent with the air flow direction blown by the blower, not only can it avoid the phenomenon that the air blown by the blower flows back into the gas pipeline due to excessive pressure, but also the gas ejection direction being consistent with the air outlet direction of the blower can reduce the impact when the two meet, with small kinetic energy loss, making the gas and air mix more fully and evenly, and improving the combustion efficiency.

[0064] Preferably, the blower is a centrifugal blower. The blower is detachably installed at the first mounting port 211, and the second nozzle 50 is detachably installed at the second mounting port 212, which is convenient for disassembly and assembly.

[0065] In some embodiments, the first mounting port 211 is provided on the side wall of the premixing housing 21, and the second mounting port 212 is provided on the bottom wall of the premixing housing 21; one end of the second nozzle 50 with the gas outlet 502 extends into the premixing chamber 201 from the first mounting port 211, and is located between the blower and the premixed gas outlet 2010, and the gas outlet 502 is on the side of the second nozzle 50 facing away from the blower.

[0066] In the above embodiments, by setting the first mounting port 211 on the side wall of the premixing housing 21 and the second mounting port 212 on the bottom wall of the premixing housing 21, the blower and the second nozzle 50 are installed at different positions on the premixing housing 21, one on the side and the other on the bottom, making the layout and wiring more convenient. And by setting the second nozzle 50 between the blower and the premixed gas outlet 2010, the air blown by the blower can flow through the second nozzle 50, enabling the gas and air to be fully mixed and burned without dead corners. And by setting the gas outlet 502 on the side of the second nozzle 50 facing away from the blower, the gas ejection direction is consistent with the blowing direction of the blower, avoiding the phenomenon that the air blown by the blower flows back into the gas pipeline due to excessive pressure, and reducing the impact when the two meet, with small kinetic energy loss, making the gas and air mix more fully and evenly, and improving the combustion efficiency.

[0067] Specifically, the premixing housing 21 includes a premixing housing main body and a diversion housing provided on the side of the premixing housing main body. The premixing housing main body and the diversion housing are integrally formed into an L-shaped housing structure. One end of the diversion housing is connected to the premixing housing main body, and the other end is open to form a first mounting port 211. A second mounting port 212 is opened on the bottom wall of the diversion housing. One end of the premixing housing main body is connected to the diversion housing, and the other end is provided with a premixed gas outlet 2010. The shape and size of the first mounting port 211 are consistent with those of the air outlet of the fan, and the air outlet of the fan is directly inserted and fixed in the first mounting port 211. A premixed air passage 202 is formed in the diversion housing. The first mounting port 211 constitutes the inlet of the premixed air passage 202, and the fan is installed at the inlet of the premixed air passage 202.

[0068] Optionally, the diversion housing is a rectangular rectangular housing structure with a rectangular cross-section, and the premixing housing main body is a hollow housing structure with a cylindrical main body portion 2011. The inner cavity of the premixing housing main body constitutes a premixing chamber 201. The air outlet direction of the fan is consistent with the length direction of the diversion housing. The gas outlet 502 is opened on the side wall of the second nozzle 50 facing away from the fan. Alternatively, in other alternative embodiments, the gas outlet 502 is located at one end of the second nozzle 50 extending into the premixing chamber 201, and the outlet end of the second nozzle 50 is bent in an L shape, and the outlet end of the second nozzle 50 is bent in a direction away from the fan so that the gas ejection direction is consistent with the air outlet direction of the fan.

[0069] In some embodiments, the second nozzle 50 includes a nozzle main body 51 and a mounting plate 52. The nozzle main body 51 includes an extending section 511 extending into the premixing chamber 201 and a connecting section 512 located outside the premixing chamber 201. The mounting plate 52 is fixedly provided on the outer wall of the nozzle main body 51. The mounting plate 52 is used to abut and limit against the premixing housing 21 when the extending section 511 extends into the premixing chamber 201, and is fixed to the premixing housing 21 by screws.

[0070] In the above embodiment, the gas outlet 502 is provided on the extending section 511. The connecting section 512 is located outside the premixing chamber 201 for convenient connection with components such as a gas proportioning valve. By providing the mounting plate 52 on the outer wall of the nozzle main body 51, the mounting plate 52 can abut and limit against the premixing housing 21 when the extending section 511 extends into the premixing chamber 201, thereby forming a positioning. And the mounting plate 52 is provided with connecting holes, and the connecting holes and the premixing housing 21 can be connected by screws to realize the connection and fixation of the second nozzle 50 and the premixing housing 21, which is convenient for disassembly and assembly.

[0071] Specifically, the nozzle body 51 of the second nozzle 50 is in a hollow columnar shape, and one end extending into the premixing chamber 201 is closed and the other end is open. The gas outlet 502 is provided on the side of the columnar nozzle body 51 facing away from the blower. The outer periphery of the connecting section 512 is provided with an external thread, which is convenient for threaded connection with components such as a gas proportional valve, and can ensure the reliability and tightness of the connection. The mounting plate 52 is a plate-like structure surrounding the outer peripheral wall of the nozzle body 51. The entire nozzle body 51 is separated into upper and lower sections by the mounting plate 52, namely, the extending section 511 and the connecting section 512. The mounting plate 52 is provided with connecting holes. Preferably, there are two connecting holes, and the two connecting holes are symmetrically arranged on both sides of the mounting plate 52. The mounting plate 52 and the premixing housing 21 are connected by two screws, with better balance and stability and more reliable and firm connection.

[0072] Optionally, in this embodiment, the second mounting opening 212 is a square hole, which is convenient for processing. A square platform is correspondingly provided on the nozzle body 51. The square platform is located on the side of the mounting plate 52 close to the extending section 511. When assembling the second nozzle 50, the square platform can be accurately positioned into the second mounting opening 212.

[0073] In some embodiments, the inlet end of the first nozzle 30 is threadedly connected to the premixed gas outlet 2010, and the outlet end extends into the throat 111.

[0074] In the above embodiment, the inlet end of the first nozzle 30 is threadedly connected to the premixed gas outlet 2010, which is convenient for disassembly and assembly, and the connection is reliable and stable.

[0075] Specifically, the first nozzle 30 has a cylindrical main body. The inlet end of the cylindrical main body is provided with an external thread, which is convenient for threaded connection with the premixed gas outlet 2010. Of course, in other alternative embodiments, the inlet end of the first nozzle 30 can also be directly inserted and fixed in the premixed gas outlet 2010.

[0076] Furthermore, a hollow gas injection channel is formed inside the cylindrical main body. Preferably, one side of the gas injection channel close to its outlet end is tapered, so as to further increase the pressure and kinetic energy when the gas is ejected, thereby being able to drive more air to enter from the entrained air inlet 112, making the mixing of the mixed gas and the newly entrained air more uniform.

[0077] In some embodiments, the premixing chamber 201 includes a main body portion 2011 and a confluence portion 2012; along the gas flow direction, the inner diameter of the confluence portion 2012 gradually decreases from the main body portion 2011 towards the premixed gas outlet 2010.

[0078] In the above embodiments, the premixing chamber 201 is designed with a converging portion 2012 whose inner diameter gradually decreases from the main body portion 2011 towards the premixed gas outlet 2010, which facilitates the convergence of the gas and air after the primary premixing towards the premixed gas outlet 2010, and can further increase the pressure of the gas at the premixed gas outlet 2010, thereby increasing the impact kinetic energy of the gas ejected from the premixed gas outlet 2010, and further improving the mixing efficiency of the air and gas in the secondary premixing, making the air and gas in the secondary premixing more uniformly and fully mixed.

[0079] Optionally, the main body portion 2011 of the premixing chamber 201 is frustum-shaped, and the converging portion 2012 is frustum-shaped.

[0080] In some embodiments, the throat 111 and the entrained air inlet 112 are provided on the side end wall of the entrainment tube 11 close to the premixer 20. The burner further includes an air flow regulating mechanism 60. The air flow regulating mechanism 60 includes a regulating flap 61 and an elastic member 62. The regulating flap 61 is rotatably sleeved outside the first nozzle 30, and a regulating hole 610 is provided on the regulating flap 61; the elastic member 62 is disposed between the regulating flap 61 and the first nozzle 30 or the premixer 20, and the elastic member 62 is used to apply an elastic force to the regulating flap 61 to make it closely adhere to the end wall; the regulating flap 61 is used to be driven to rotate to adjust the overlapping area between the regulating hole 610 and the entrained air inlet 112, thereby adjusting the air flow rate of the entrained air.

[0081] In the above embodiments, by providing the air flow regulating mechanism 60, the amount of air naturally entrained into the entrainment tube 11 can be adjusted as needed. The air flow regulating mechanism 60 is designed with a regulating flap 61. The regulating flap 61 can be driven to rotate to adjust the overlapping area between the regulating hole 610 and the entrained air inlet 112. When a larger air intake is desired, the overlapping area between the regulating hole 610 and the entrained air inlet 112 is made larger; conversely, when a smaller air intake is desired, the overlapping area between the regulating hole 610 and the entrained air inlet 112 is made smaller. The adjustment is very convenient and fast. By providing the elastic member 62, the regulating flap 61 is made to closely adhere to the end wall of the entrainment tube 11, avoiding gaps between the regulating flap 61 and the end wall of the entrainment tube 11, which may cause air leakage and affect the air flow regulation effect.

[0082] Specifically, in combination with Figures 1 to 4 and Figure 10 as shown, an opening is provided in the middle of the regulating flap 61 to facilitate sleeving on the first nozzle 30. The regulating hole 610 is opened on the regulating flap 61 located outside the opening. Optionally, the regulating hole 610 is a fan-shaped hole, and the number of the regulating holes 610 can be one or two or more spaced apart.

[0083] Preferably, a toggle rod 611 is fixedly provided on the side of the adjustment baffle 61, and the toggle rod 611 can be driven to rotate the adjustment baffle 61 to adjust the airflow size of the secondary air. The toggle rod 611 is set to facilitate manual or electric driving of the adjustment baffle 61 to rotate to adjust the amount of naturally induced air.

[0084] In some embodiments, the elastic member 62 is a spring sleeved on the first nozzle 30 ; an annular boss 31 is provided on the outer periphery of the first nozzle 30 , one end of the spring abuts against the annular boss 31 , and the other end abuts against the adjustment baffle 61 .

[0085] In the above embodiment, the elastic member 62 adopts a spring structure sleeved on the first nozzle 30, which has a simple structure and low cost. In addition, through the annular boss 31 arranged on the outer periphery of the first nozzle 30, the spring is compressed and abutted between the annular boss 31 and the adjusting baffle 61, so that the adjusting baffle 61 can be tightly attached to and maintained on the end wall of the ejector tube 11. The structure is relatively simple, easy to implement, and convenient and quick to disassemble and assemble.

[0086] Of course, in other alternative embodiments, the elastic member 62 may also be in the form of a spring sheet, an elastic rope, or the like.

[0087] In some embodiments, the premixer 20 is connected and fixed to the furnace head 10 by screws and / or clamping.

[0088] In the above embodiment, the premixer 20 and the furnace head 10 are connected and fixed by means of screws and / or clamping, which is convenient for assembly and disassembly.

[0089] Optionally, in this embodiment, the premixer 20 is fixed to the furnace head 10 by screw connection. Figures 1 to 3 As shown, a screw connection portion 213 is provided at one end of the premixing shell 21 close to the ejector tube 11, and a screw hole is provided on the screw connection portion 213. A matching connection portion 12 is provided on the outer peripheral wall of the end of the ejector tube 11 that is connected to the premixer 20, and a threaded hole is provided in the matching connection portion 12. The screw hole of the screw connection portion 213 and the threaded hole of the matching connection portion 12 are connected by screws to achieve the connection and fixation of the premixer 20 to the furnace head 10.

[0090] Preferably, there are two groups of screw connecting parts 213, which are symmetrically arranged on both sides of the premixing shell 21. The screw connecting parts 213 are connecting plates, and two groups of matching connecting parts 12 are correspondingly arranged on both sides of the ejector tube 11. The two groups of matching connecting parts 12 and the two groups of screw connecting parts 213 are connected by two screws, so that the fixation is more secure and stable.

[0091] In this embodiment, one end of the burner is connected to the premixer 20 , and the other end is connected to the flame distributor 70 .

[0092] The following will introduce the specific structure and working process of the burner in this embodiment in conjunction with Figures 1 to 10 , the specific structure and working process of the burner in this embodiment will be introduced.

[0093] Specifically, the premixer 20 has a premixing housing 21. The premixing housing 21 is provided with a first mounting port 211 and a second mounting port 212. A premixing chamber 201 is formed inside the premixing housing 21. The blast blower is installed at the first mounting port 211. The blast blower blows air into the premixing chamber 201 through the premixed air passage 202. The second nozzle 50 is a gas nozzle and is installed at the second mounting port 212. The gas nozzle has a gas inlet 501 and a gas outlet 502. The gas ejected by the gas nozzle and the air agitated by the blast blower are premixed in the premixing chamber 201 to form a mixed gas of blast air and gas. The gas outlet 502 is arranged to be in the same direction as the flow direction of the air agitated by the blast blower, so as to avoid the phenomenon of air backflow into the gas pipeline due to the excessive pressure of the air agitated by the blast blower.

[0094] Furthermore, the burner head 10 has an ejector tube 11. The ejector tube 11 is provided with a throat 111. The first nozzle 30 is arranged at the premixed gas outlet 2010 of the premixer 20 and the throat 111. The mixed gas of blast air and gas is sprayed into the ejector tube 11 through the first nozzle 30. At the same time, natural entrainment drives air to enter the ejector tube 11 from the entrained air inlet 112 through the gap between the premixer 20 and the burner head 10, so that the mixed gas of blast air and gas formed in the premixing chamber 201 is premixed with air again to form a double-premixed air-gas mixture for the gas stove to burn.

[0095] After the present application realizes the primary premixing of gas and air by setting a blast blower and a blast premixing chamber 201 body, it is sprayed into the ejector tube 11 through the first nozzle 30. At the same time, the kinetic energy of the gas sprayed by the first nozzle 30 is used to naturally drive air to realize the secondary premixing of air-fuel gas in the ejector tube 11. The double premixing is used to improve the uniformity of gas and air, and solve the problems in the prior art that the pre-mixing of air and gas is uneven, resulting in incomplete combustion of some gas, high emission of harmful gases, and low combustion efficiency.

[0096] According to an embodiment of the present invention, on the other hand, a gas stove is provided, including the burner according to any of the above embodiments.

[0097] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the protection scope of the embodiments of the present application.

Claims

1. A burner, characterized in that: include: The furnace head (10) comprises an ejector pipe (11), wherein the ejector pipe (11) has a throat (111), and an ejector air inlet (112) is arranged on the outer periphery of the throat (111); A premixer (20) having a premixing chamber (201), wherein the premixing chamber (201) is provided with a premixed gas outlet (2010), and the premixed gas outlet (2010) is connected to the throat (111) via a first nozzle (30); The air inlet mechanism (40) and the gas delivery mechanism are respectively connected to the premixing chamber (201) and are used to deliver gas and air to the premixing chamber (201) so as to perform a premixing operation in the premixing chamber (201); The first nozzle (30) is capable of spraying the mixed gas in the premixing chamber (201) after primary premixing into the ejector tube (11), and is capable of driving external air from the ejector air inlet (112) into the ejector tube (11) to achieve secondary premixing.

2. The burner according to claim 1, characterized in that The premixer (20) comprises a premixing housing (21) having the premixing chamber (201) therein, and the premixing housing (21) is provided with a first mounting opening (211) and a second mounting opening (212); The air inlet mechanism (40) comprises a fan installed at the first mounting port (211), and the gas delivery mechanism comprises a second nozzle (50) installed at the second mounting port (212); The second nozzle (50) has a gas inlet (501) and a gas outlet (502); the gas outlet (502) is located in the premixing chamber (201), and the direction of the gas outlet (502) is consistent with the air outlet direction of the fan.

3. The burner according to claim 2, characterized in that The first installation opening (211) is provided on a side wall of the premixing shell (21), and the second installation opening (212) is provided on a bottom wall of the premixing shell (21); One end of the second nozzle (50) provided with the gas outlet (502) extends from the first mounting opening (211) into the premixing chamber (201) and is located between the fan and the premixed gas outlet (2010); the gas outlet (502) is located on a side of the second nozzle (50) facing away from the fan.

4. The burner according to claim 2, characterized in that: The second nozzle (50) comprises: A nozzle body (51), comprising an extending section (511) extending into the premixing chamber (201) and a connecting section (512) located outside the premixing chamber (201); A mounting plate (52) is fixedly arranged on the outer wall of the nozzle body (51); the mounting plate (52) is used to abut against the premixing shell (21) for limiting position when the extending section (511) extends into the premixing chamber (201), and is fixed to the premixing shell (21) by screws.

5. The burner according to any one of claims 1 to 4, characterized in that: The inlet end of the first nozzle (30) is threadedly connected to the premixed gas outlet (2010), and the outlet end extends into the throat (111).

6. The burner according to any one of claims 1 to 4, characterized in that: The premixing chamber (201) comprises a main body portion (2011) and a confluence portion (2012); Along the gas flow direction, the inner diameter of the converging portion (2012) gradually decreases from the main body portion (2011) toward the premixed gas outlet (2010).

7. The burner according to any one of claims 1 to 4, characterized in that: The throat (111) and the ejection air inlet (112) are arranged on an end wall of the ejection pipe (11) close to the premixer (20); The burner further comprises an airflow adjustment mechanism (60), wherein the airflow adjustment mechanism (60) comprises: An adjusting baffle (61) is rotatably sleeved outside the first nozzle (30), and an adjusting hole (610) is provided on the adjusting baffle (61); an elastic member (62) disposed between the adjusting baffle (61) and the first nozzle (30) or the premixer (20), the elastic member (62) being used to apply an elastic force to the adjusting baffle (61) so that the adjusting baffle (61) is closely attached to the end wall; The adjustment baffle (61) is driven to rotate to adjust the overlapping area between the adjustment hole (610) and the induced air inlet (112), thereby adjusting the airflow size of the induced air.

8. The burner according to claim 7, characterized in that The elastic member (62) is a spring sleeved on the first nozzle (30); An annular boss (31) is provided on the outer periphery of the first nozzle (30); one end of the spring abuts against the annular boss (31), and the other end abuts against the adjustment baffle (61).

9. The burner according to any one of claims 1 to 4, characterized in that: The premixer (20) is connected and fixed to the furnace head (10) by means of screws and / or clamping.

10. A gas stove, characterized in that: A burner comprising any one of claims 1 to 9.

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