Burners and gas stoves

Abstract

This invention discloses a burner and a gas stove. The burner includes a nozzle and an ejector assembly. The ejector assembly is arranged along the central axis of the nozzle and includes a first ejector tube and a second ejector tube, which are arranged sequentially along the central axis of the nozzle. The first ejector tube and the second ejector tube are fixedly connected. The first ejector tube forms a first ejection channel. A primary air channel is formed between the nozzle and the first ejection channel. The second ejector tube forms a second ejection channel. A secondary air channel is formed between the first and second ejection channels. An air inlet is provided on the second ejector tube, which is connected to the secondary air channel. In this way, the burner adopts multi-stage air introduction, which can enhance the ejection capacity of primary air, greatly enhance the mixing degree of gas and air, thereby improving combustion efficiency and heat load, and reducing the emission of harmful gases in flue gas.

Description

Technical Field

[0001] This invention relates to the field of gas stove technology, and more particularly to a burner and a gas stove. Background Technology

[0002] In related technologies, burners typically use one nozzle corresponding to one venturi tube. For cooktops, one nozzle corresponding to an outer ring venturi tube handles the gas supply load for the entire outer ring flame, while one nozzle corresponding to an inner ring venturi tube handles the gas supply load for the entire inner ring flame. However, it is difficult to substantially increase the primary air volume required by the entire burner, resulting in shortcomings in ejector capability, combustion efficiency, and flue gas emissions. Summary of the Invention

[0003] This invention provides a burner and a gas stove.

[0004] The burner of this invention is used in a gas stove, the burner comprising:

[0005] Nozzle; and

[0006] An ejector assembly is provided along the central axis of the nozzle. The ejector assembly includes a first ejector and a second ejector arranged sequentially along the central axis. The first ejector and the second ejector are fixedly connected. The first ejector forms a first ejection channel. The nozzle and the first ejection channel form a primary air channel at an interval. The second ejector forms a second ejection channel. The first ejection channel and the second ejection channel form a secondary air channel at an interval. An air inlet is provided on the second ejector, and the air inlet is connected to the secondary air channel.

[0007] In the burner of this invention, the combustion gas ejected from the nozzle is first mixed with air entering from the primary air passage in the first ejector passage, and then, after being ejected again by the first ejector tube, it is mixed with air entering from the air inlet on the second ejector tube into the secondary air passage in the second ejector tube. In this way, the burner employs multi-stage air introduction, which enhances the primary air ejection capability, greatly strengthens the mixing degree of combustion gas and air, thereby improving combustion efficiency and heat load, and reducing the emission of harmful gases in the flue gas.

[0008] In some embodiments, the first ejector tube is at least partially fitted inside the second ejector tube.

[0009] In some embodiments, the first ejector tube has a first mounting portion disposed on the outer peripheral wall of the first ejector channel, the second ejector tube includes a second mounting portion that cooperates with the first mounting portion, the first ejector tube is at least partially sleeved within the second mounting portion, and the second mounting portion has the air inlet formed therein.

[0010] In some embodiments, the second mounting portion includes a plurality of spaced-apart plates that cooperate with the first mounting portion, and the plurality of plates form the air inlets at intervals along the circumference of the second ejector tube.

[0011] In some embodiments, the second mounting portion is disposed at one end of the second ejection channel, and the first mounting portion is sleeved inside the second mounting portion.

[0012] In some embodiments, the first mounting portion protrudes from the outer peripheral wall of the first ejector channel toward the outside of the first ejector channel, and the second mounting portion extends from one end of the second ejector channel along the central axis toward the side where the first ejector tube is located.

[0013] In some embodiments, one of the first mounting portion and the second mounting portion has a protrusion and the other has a groove, the groove engaging with the protrusion to limit the relative position of the first ejector tube and the second ejector tube.

[0014] In some embodiments, the burner includes a sleeve fitted onto the second mounting portion, the first ejector tube being located inside the sleeve, and the sleeve being rotatable about the central axis to open or close the air inlet.

[0015] In some embodiments, the sleeve includes a first shield configured to open or close the air inlet when the sleeve rotates about the central axis.

[0016] In some embodiments, the burner includes a damper plate mounted on the first ejector tube, the nozzle mounted on the damper plate, the damper plate having a notch communicating with the primary air passage, and the sleeve being rotatable about the central axis to open or close the notch.

[0017] In some embodiments, the sleeve includes a second blocking portion configured to open or close the notch as the sleeve rotates about the central axis.

[0018] In some embodiments, the first ejector tube is horn-shaped.

[0019] In some embodiments, the first ejector channel includes a first ejector section and a second ejector section connected in sequence, wherein the first ejector section tapers from the side where the nozzle is located to the side where the second ejector section is located, and the diameter of the second ejector section is smaller than the diameter of the first ejector section.

[0020] In some embodiments, the second ejector channel includes a third ejector segment, a fourth ejector segment, and a fifth ejector segment connected in sequence, wherein the diameter of the third ejector segment is larger than the diameter of the fourth ejector segment, and the diameter of the fifth ejector segment is larger than the diameter of the fourth ejector segment.

[0021] The gas stove according to the embodiments of the present invention includes the burner described in any of the above embodiments.

[0022] In the gas stove of this invention, the gas ejected from the nozzle is first mixed with air entering from the primary air passage in the first ejector channel, and then, after being ejected again by the first ejector tube, it is mixed with air entering from the air inlet on the second ejector tube into the secondary air passage in the second ejector tube. In this way, the burner employs multi-stage air introduction, which enhances the primary air ejection capability, greatly strengthens the mixing degree of gas and air, thereby improving combustion efficiency and heat load, and reducing the emission of harmful gases in the flue gas.

[0023] Additional aspects and advantages of embodiments of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0025] Figure 1 This is a three-dimensional schematic diagram of the burner according to an embodiment of the present invention;

[0026] Figure 2 This is a three-dimensional exploded view of the burner according to an embodiment of the present invention;

[0027] Figure 3 This is a plan view of the burner according to an embodiment of the present invention;

[0028] Figure 4 yes Figure 3 A schematic cross-sectional view of the burner along line IV-IV;

[0029] Figure 5 This is another plan view of the burner according to an embodiment of the present invention;

[0030] Figure 6 yes Figure 5 A cross-sectional schematic diagram of the burner along line VI-VI;

[0031] Figure 7 This is yet another plan view of the burner according to an embodiment of the present invention;

[0032] Figure 8 This is another plan view of the burner according to an embodiment of the present invention;

[0033] Figure 9 This is a structural schematic diagram of a gas stove according to an embodiment of the present invention.

[0034] Explanation of key component symbols:

[0035] Gas stove 1000;

[0036] Burner 100, nozzle 10, central axis L, ejector assembly 20, first ejector 21, first ejector channel 211, first ejector section 2111, second ejector section 2112, primary air channel 212, first mounting part 213, second ejector 22, second ejector channel 221, third ejector section 2211, fourth ejector section 2212, fifth ejector section 2213, secondary air channel 222, second mounting part 223, air inlet 2231, sleeve 30, damper plate 40, conveying pipe 50, first conveying part 51, second conveying part 52, cover 60, furnace head 70;

[0037] Panel 200, knob 300. Detailed Implementation

[0038] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein 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 only used to explain the present invention, and should not be construed as limiting the present invention.

[0039] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0040] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0041] In the description of this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0042] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0043] Please see Figures 1 to 6 The burner 100 of this invention is used in a gas stove 1000 (see...) Figure 9The burner 100 includes a nozzle 10 and an ejector assembly 20. The ejector assembly 20 is arranged along the central axis L of the nozzle 10. The ejector assembly 20 includes a first ejector 21 and a second ejector 22, which are fixedly connected and arranged sequentially along the central axis L of the nozzle 10. The first ejector 21 forms a first ejector channel 211. The nozzle 10 and the first ejector channel 211 form a primary air channel 212 at intervals. The second ejector 22 forms a second ejector channel 221. The first ejector channel 211 and the second ejector channel 221 form a secondary air channel 222 at intervals. An air inlet 2231 is provided on the second ejector 22, which is connected to the secondary air channel 222.

[0044] In embodiments of the present invention, the gas stove 1000 includes, but is not limited to, gas stoves, gas ovens, and other household appliances that require the use of gas.

[0045] Understandably, in related technologies, burners typically use one nozzle per venturi tube. For cooktops, one nozzle per outer ring venturi tube supplies the gas load for the entire outer ring flame, while one nozzle per inner ring venturi tube supplies the gas load for the entire inner ring flame. However, it's difficult to substantially increase the primary air volume required by the entire burner, resulting in shortcomings in ejector capability, combustion efficiency, and flue gas emissions.

[0046] In the burner 100 of this embodiment, the combustion gas ejected from the nozzle 10 is first mixed with air entering from the primary air passage 212 in the first ejector passage 211, and then, after being ejected again by the first ejector tube 21, it is mixed with air entering from the air inlet 2231 on the second ejector tube 22 in the second ejector tube 22. Thus, the burner 100 employs multi-stage air introduction, which enhances the primary air ejection capability, greatly strengthens the mixing degree of combustion gas and air, thereby improving combustion efficiency and heat load, and reducing the emission of harmful gases in the flue gas.

[0047] Specifically, in an embodiment of the present invention, gas is injected through nozzle 10 into ejector assembly 20. A primary air channel 212 is formed between nozzle 10 and the first ejector channel 211. The gas flow rate is relatively fast, creating a negative pressure. Therefore, outside air is drawn into the primary air channel 212 under the action of the negative pressure (air flow path as follows). Figure 6 (As shown by the dashed arrow A in the diagram), thus allowing the gas and air to undergo preliminary mixing within the first ejector channel 211 of the first ejector tube 21.

[0048] Then, the pre-mixed gas continues to be ejected from the first ejector channel 211 into the second ejector channel 221. A secondary air channel 222 is formed between the second ejector channel 221 and the first ejector channel 211, and an air inlet 2231 is formed on the second ejector tube 22. When the gas pre-mixed in the first ejector tube 21 enters the second ejector channel 221, due to the negative pressure, outside air enters the second ejector channel 221 of the second ejector tube 22 through the air inlet 2231 and the secondary air channel 222 (the air flow path is as follows). Figure 6 (As shown by the dashed arrow B in the image), this allows the initially mixed gas and air to mix again, thereby strengthening the mixing intensity of the fuel and air, and improving combustion efficiency and heat load.

[0049] It should be noted that, in the embodiments of the present invention, "the first ejector tube 21 and the second ejector tube 22 are arranged sequentially along the central axis L of the nozzle 10" can be understood as the axes of the first ejector tube 21 and the second ejector tube 22 both coinciding with the central axis L of the nozzle 10, or the axes of the first ejector tube 21 and the second ejector tube 22 both having a certain eccentricity with the central axis L of the nozzle 10, but without affecting the entry of the gas ejected from the nozzle 10 into the first ejector tube 21 and without affecting the entry of the gas flowing out of the first ejector tube 21 into the second ejector tube 22.

[0050] Furthermore, it is understood that in some embodiments, the ejector assembly 20 may also include more ejector tubes, such as 3 or 4 or even more, with multiple ejector tubes arranged sequentially along the central axis L of the nozzle 10, and a secondary air passage 222 formed between each two adjacent ejector tubes, the specific number of which is not limited here.

[0051] In some embodiments, the first ejector tube 21 is at least partially fitted inside the second ejector tube 22.

[0052] In this way, the total length of the ejector assembly 20 in the direction of the central axis can be reduced, thereby reducing the volume of the burner 100 and making the structure of the burner 100 more compact due to the miniaturization of the burner 100.

[0053] Please see Figure 2 , Figure 4 as well as Figure 6 Furthermore, in some embodiments, the first ejector tube 21 has a first mounting portion 213, which is disposed on the outer peripheral wall of the first ejector channel 211. The second ejector tube 22 includes a second mounting portion 223, which is disposed at one end of the second ejector channel 221. The second mounting portion 223 cooperates with the first mounting portion 213, and the first ejector tube 21 is at least partially fitted inside the second mounting portion 223. The second mounting portion 223 has an air inlet 2231.

[0054] Thus, the cooperation between the first mounting portion 213 and the second mounting portion 223 allows the first ejector tube 21 and the second ejector tube 22 to be stably and fixedly connected together without shaking, which would cause inaccurate alignment of the first ejector tube 21 and the second ejector tube 22. In addition, the fact that the first ejector tube 21 is at least partially fitted inside the second mounting portion 223 makes the entire ejector tube assembly 20 more compact and occupies less space.

[0055] Please refer to the figure. Figure 2 and Figure 4 In some embodiments, the second mounting portion 223 includes a plurality of plate portions 2232 spaced apart, the plurality of plate portions 2232 cooperating with the first mounting portion 213, and the plurality of plate portions 2232 forming air inlets 2231 spaced apart along the circumference of the second ejector tube 22.

[0056] Thus, multiple plates 2232 spaced apart can form an air inlet 2231, resulting in a relatively simple structure.

[0057] It should be noted that, in the embodiments of the present invention, "multiple" can be understood as two or more. In the illustrated embodiment, the number of plate portions 2232 is two. It can be understood that in other embodiments, the number of plate portions 2232 may be more than two, and there is no specific limitation.

[0058] Please see 2 and Figure 4 In some embodiments, the first mounting portion 213 protrudes from the outer peripheral wall of the first ejection channel 211 toward the outside of the first ejection channel 211, and the second mounting portion 223 extends from one end of the second ejection channel 221 along the central axis L toward the side where the first ejection tube 21 is located.

[0059] Please see Figure 2 and Figure 4 In some embodiments, the first mounting portion 213 includes two protrusions 2131 spaced apart on the outer peripheral wall of the first ejector channel 211, the two protrusions 2131 being spaced apart circumferentially along the first ejector tube 21. The second mounting portion 223 includes two plate portions 2232 corresponding to the two protrusions 2131 respectively, the two plate portions 2232 engaging with the two protrusions 2131 respectively, and the two plate portions 2232 forming air inlets 2231 spaced apart circumferentially along the second ejector tube 22.

[0060] Thus, the protrusion 2131 and the plate portion 2232 cooperate to allow the first ejector tube 21 to be stably mounted on the second ejector tube 22. At the same time, the two plate portions 2232 can form an air inlet 2231 while spaced apart, resulting in a relatively simple structure.

[0061] Specifically, for ease of installation, mounting holes can be formed on both the protrusion 2131 and the plate portion 2232. The two can then be fixed together using screws or other fastening elements, thereby achieving a stable fit between the first mounting portion 213 and the second mounting portion 223. Of course, in some embodiments, the protrusion 2131 and the plate portion 2232 can also be connected in other ways, without limitation. It is understood that in some embodiments, the number of plate portions 2232 and protrusions 2131 can be greater than two, without limitation here.

[0062] Further, please refer to Figure 2 In some embodiments, the first mounting portion 213 is formed with a protrusion 2131, and the second mounting portion 223 is formed with a groove 2233. The groove 2233 cooperates with the protrusion 2131 to limit the relative position of the first ejector tube 21 and the second ejector tube 22.

[0063] Thus, during installation, the protrusion 2131 and the groove 2233 cooperate to prevent the first ejector tube 21 from rotating relative to the second ejector tube 22, thereby ensuring the relative position of the first mounting part 213 and the second mounting part 223 for easy installation.

[0064] Specifically, in the illustrated embodiment, the plate portion 2232 of the second mounting portion 223 has a groove 2233, and the first mounting portion 213 has a protrusion 2131. The groove 2233 and the protrusion 2131 cooperate to limit the relative position of the first ejector tube 21 and the second ejector tube 22. The number of protrusions 2131 corresponds to the number of plate portions 2232. It is understood that in other embodiments, the first mounting portion 213 may have a groove, and the second mounting portion 223 may have a protrusion; this is not a limitation here.

[0065] Please see Figures 1 to 6 In some embodiments, the burner 100 further includes a sleeve 30, which is fitted onto the second mounting portion 223. The first ejector tube 21 is located inside the sleeve 30. The sleeve 30 is rotatable about the central axis L to open or close the air inlet 2231.

[0066] Thus, the sleeve 30 can protect the first ejector tube 21 and the second mounting part 223, thereby enhancing the connection stability of the first ejector tube 21 and the second ejector tube 22. At the same time, the sleeve 30 can rotate to adjust the amount of air entering the secondary air passage 222 from the air inlet 2231, thereby adjusting the flame size of the burner 100.

[0067] Please see Figure 2 , Figure 5 as well as Figure 7In some embodiments, the sleeve 30 includes a first shield 31, which is configured to open or close the air inlet 2231 when the sleeve 30 rotates about the central axis L.

[0068] Specifically, in the illustrated embodiment, when it is necessary to adjust the amount of air entering the secondary air passage 222, it is only necessary to rotate the sleeve 30 so that the first blocking part 31 gradually blocks or opens the air inlet 2231, thereby changing the size of the opening of the air inlet 2231 to adjust the size of the flame of the burner 100.

[0069] Please see Figure 2 , Figure 4 and Figure 6 In some embodiments, the burner 100 includes a damper plate 40, which is mounted on the first ejector tube 21 and sleeved inside the sleeve 30. The nozzle 10 is mounted on the damper plate 40. The damper plate 30 has a notch 42 that connects to the primary air passage 212. The sleeve 30 is rotatable about the central axis L to open or close the notch 42.

[0070] Thus, during installation, the damper plate 40 can be installed on the first injector tube 21 first, and then the nozzle 10 can be installed on the damper plate 40. This makes the positions of the nozzle 10 and the first injector tube 21 relatively stable, thereby avoiding misalignment of the nozzle 10 and the first injector tube 21. At the same time, the sleeve 30 can be rotated to adjust the amount of air entering the primary air passage 212 from the notch 42, thereby adjusting the flame size of the burner 100.

[0071] Specifically, please refer to Figure 2 In the illustrated embodiment, a mounting post 214 is formed on the first ejector tube 21, and a mounting hole 41 is formed on the damper plate 40. During installation, installation can be achieved simply by aligning the mounting hole 41 of the damper plate 40 with the mounting post 214 on the first ejector tube 21. It is understood that in some embodiments, the first ejector tube 21 may have a mounting hole, and the damper plate 40 may have a mounting post; alternatively, the first ejector tube 21 may have both a mounting post and a mounting hole, and the damper plate 40 may also have both a mounting post and a mounting hole. The mounting post on the first ejector tube 21 aligns with the mounting hole on the damper plate 40, and vice versa. No specific limitation is made here.

[0072] Please see Figure 2 and Figure 7In some embodiments, the sleeve 30 includes a second blocking portion 32, which is configured to open or close the notch 42 when the sleeve 30 rotates about the central axis L. Specifically, in the illustrated embodiment, when it is necessary to adjust the amount of air entering the primary air passage 212, it is only necessary to rotate the sleeve 30 so that the second blocking portion 32 gradually blocks or opens the notch 42, thereby changing the size of the opening of the notch 42 to adjust the size of the flame of the burner 100.

[0073] I understand, please consider this. Figure 7 In this embodiment of the invention, to ensure that outside air can enter the primary air passage 212 between the nozzle 10 and the first ejector channel 211, the sleeve 30 has two second blocking portions 32, with a through hole 33 spaced between the two second blocking portions 32. When air needs to be introduced, the through hole 33 of the sleeve 30 is at least partially connected to the notch 42, allowing outside air to enter the primary air passage 212 through the through hole 33 and the notch 42 under the negative pressure of the combustion gas. When the amount of air entering needs to be adjusted, the sleeve 30 is simply rotated so that the second blocking portion 32 gradually blocks the notch 42, changing the overlap between the notch 42 and the through hole 33, thereby changing the amount of air entering the primary air passage 212. When air is not needed, the sleeve 30 is simply rotated so that the second blocking portion 32 completely closes the notch 42.

[0074] Furthermore, in this embodiment, the sleeve 30 can simultaneously open or close the air inlet 2231 and the notch 42, thereby simultaneously changing the amount of air entering the secondary air passage 222 and the primary air passage 212. That is to say, while the first blocking part 31 opens or closes the air inlet 2231, the second blocking part 32 simultaneously opens or closes the notch 42. It is understood that in other embodiments, the sleeve 30 may not simultaneously open or close the air inlet 2231 and the notch 42. For example, when the sleeve 30 completely closes the air inlet 2231, the notch 42 may not be completely closed. The specific arrangement is not limited here.

[0075] Please see Figure 2 In some embodiments, the notch 42 is arc-shaped and is formed by recessing from the outer wall of the damper plate 40 toward the inner side of the damper plate 40.

[0076] Please see Figures 2 to 5 In some embodiments, the first ejector tube 21 is funnel-shaped. In this way, the ejection capability of the first ejector tube 21 is better.

[0077] Please see Figure 4 and Figure 6In some embodiments, the first ejector channel 211 includes a first ejector section 2111 and a second ejector section 2112 connected in sequence. The first ejector section 2111 gradually narrows from the side where the nozzle 10 is located to the side where the second ejector section 2112 is located. The diameter of the second ejector section 2112 is smaller than the diameter of the first ejector section 2111.

[0078] Thus, as the gas and air mix and flow through the first ejector section 2111, the diameter of the first ejector section 2111 gradually decreases, thereby gradually increasing the gas flow rate. This allows the gas flowing out of the first ejector tube 21 to maintain a high pressure and a fast flow rate, which in turn allows the gas to be injected into the second ejector tube 22 at a faster flow rate and into the second ejector channel 221 of the second ejector tube 22 to form a larger negative pressure, allowing air to enter the second ejector tube 22 through the secondary air channel 222.

[0079] Specifically, the gas and air are mixed in the first ejector section 2111 and then ejected through the second ejector section 2112. The first ejector section 2111 gradually narrows towards the second ejector tube 22, resulting in a higher gas pressure and flow rate entering the second ejector section 2112. This ensures that the gas can be stably injected into the second ejector channel 221 of the second ejector tube 22 for re-ejection. On the other hand, the higher gas pressure and flow rate entering the second ejector tube 22 generate a larger negative pressure when flowing through the secondary air channel 222, allowing outside air to be drawn into the second ejector channel 221. This prevents outside air from being unable to be drawn into the second ejector channel 221 due to insufficient pressure and flow rate, thus ensuring the ejection effect of the ejector tube assembly 20.

[0080] Please see Figure 4 and Figure 6 In some embodiments, the second ejector channel 221 includes a third ejector segment 2211, a fourth ejector segment 2212 and a fifth ejector segment 2213 connected in sequence, wherein the diameter of the third ejector segment 2211 is larger than the diameter of the fourth ejector segment 2212 and the diameter of the fifth ejector segment 2213 is larger than the diameter of the fourth ejector segment 2212.

[0081] Thus, the airflow injected from the first ejector tube 21 into the second ejector channel 221 is further mixed with air within the second ejector channel 221. Since the diameter of the third ejector section 2211 is larger than that of the fourth ejector section 2212, both the air pressure and velocity increase when the airflow flows from the third ejector section 2211 into the fourth ejector section 2212, and then diffuses through the fifth ejector section 2213. In this way, by pressurizing and accelerating followed by depressurizing and diffusion, the pressure loss between the gas flowing into and out of the second ejector tube 22 is minimized, thereby improving the ejection capability of the ejector assembly 20.

[0082] Specifically, in such an embodiment, when the gas enters the fourth ejector section 2212 from the third ejector section 2211, its pressure and flow rate increase due to the smaller diameter. Then, when it enters the fifth ejector section 2213, it undergoes diffusion and depressurization. In this way, the gas diffuses after being pressurized, which can minimize other pressure losses when entering and exiting the second ejector channel 221.

[0083] Please see Figures 1 to 7 as well as Figure 9 In some embodiments, the burner 100 further includes a delivery pipe 50 connected to the ejector assembly 20 and a burner head 70 connected to the delivery pipe 50. The delivery pipe 50 is connected to the second ejector channel 221 and is used to deliver gas to the burner head 70.

[0084] In this way, the delivery pipe 50 can deliver the gas mixture, which has been fully mixed with air in the first ejector channel 211 and the second ejector channel 221, to the burner head 70 of the burner 100 so that the gas mixture can be burned at the burner head 70 to form a flame.

[0085] It is understood that in this embodiment, since the gas undergoes multi-stage injection through the first ejector channel 211 and the second ejector channel 221, the gas and air are mixed more thoroughly. This reduces the amount of secondary air required at the burner head 70 (i.e., the air required for the gas mixture to burn at the burner head 70). Furthermore, the more thorough the gas mixing, the more complete the combustion, thus improving combustion efficiency.

[0086] Further, please refer to Figures 1 to 3 as well as Figure 6 In some embodiments, there are two ejector tube assemblies 20, which are arranged side by side. The delivery tube 50 includes a first delivery section 51 and a second delivery section 52 disposed in the first delivery section 51. The first delivery section 51 is connected to the second ejection channel 221 of one of the ejector tube assemblies 20, and the second delivery section 52 is connected to the second ejection channel 221 of the other ejector tube assembly 20.

[0087] Thus, the first delivery pipe 50 and the second delivery pipe 50 can respectively deliver the mixed gas formed by mixing gas and air in the two different ejector assemblies 20 to the burner head 70 to form inner and outer ring flames at the burner head 70. In addition, the fact that the second delivery pipe 50 is set inside the first delivery pipe 50 can effectively reduce the overall volume of the burner 100, making the structure of the burner 100 more compact.

[0088] Specifically, in some embodiments, the burner head 70 of the burner 100 can typically form an inner ring flame and an outer ring flame, with a first supply pipe 50 supplying gas to the outer ring flame and a second supply pipe 50 supplying gas to the inner ring flame.

[0089] In addition, please see Figure 1 , Figure 2 as well as Figure 4 In this embodiment, two ejector tube assemblies 20 are arranged side by side, and the second delivery tube 50 assembly is arranged perpendicular to the second ejector tube 22. The first delivery tube 50 extends from the second ejector tube 22 connected to it to the side where the second delivery tube 50 is located and wraps around the second delivery tube 50, so that the second delivery tube 50 is arranged inside the first delivery tube 50 to reduce the space occupied by the burner 100.

[0090] In some embodiments, there may be one or more ejector assembly 20, and each ejector assembly 20 is connected to one or more delivery pipes 50, without any specific limitation.

[0091] Please see Figures 2 to 6 as well as Figure 8 In some embodiments, the burner 100 includes a cover 60 that closes the end of the second ejector channel 221 away from the first ejector channel 211.

[0092] In this way, the cover 60 can seal one end of the second ejection channel 221, so that the mixed gas in the second ejection channel 221 will not leak.

[0093] Specifically, by sealing one end of the second ejector channel 221 with the cover 60, the mixed gas in the second ejector channel 221 can only be delivered to the furnace head 70 through the delivery pipe 50, preventing gas leakage and potential safety accidents. Please refer to [link / reference]. Figure 6 and Figure 8 In the illustrated embodiment, there are two ejector tube assemblies 20, and the cover 60 simultaneously seals the second ejection channels 221 of both ejector tube assemblies 20. It is understood that in some embodiments, two different covers 60 may be used to seal the second ejection channels 221 of the two ejector tube assemblies 20 respectively, and the specific arrangement is not limited here.

[0094] Please see Figure 9 The gas stove 1000 of the present invention includes the burner 100 of any of the above embodiments.

[0095] In the gas stove 1000 of this embodiment, the gas ejected from the nozzle 10 is first mixed with air entering from the primary air passage 212 in the first ejector passage 211, and then, after being ejected again by the first ejector tube 21, it is mixed with air entering from the air inlet 2231 on the second ejector tube 22 in the second ejector tube 22. In this way, the burner 100 employs multi-stage air introduction, which enhances the primary air ejection capability, greatly strengthens the mixing degree of gas and air, thereby improving combustion efficiency and heat load, and reducing the emission of harmful gases in the flue gas.

[0096] Specifically, the gas stove 1000 of this invention includes, but is not limited to, gas stoves, gas ovens, and other appliances that require the use of gas. Figure 9 In the illustrated embodiment, the gas stove 1000 is a gas cooker. In this example, the gas stove 1000 may also include a panel 200 and a knob 300. Both the burner 100 and the knob 300 are mounted on the panel 200, and the burner head 70 of the burner 100 protrudes from the panel 200. The knob 300 is used to ignite the burner 100 so that the gas at the burner head 70 of the burner 100 is ignited to form a flame.

[0097] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with the said embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0098] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A burner for a gas stove, characterized in that, The burner includes: Nozzle; and An ejector assembly is provided along the central axis of the nozzle. The ejector assembly includes a first ejector and a second ejector arranged sequentially along the central axis. The first ejector and the second ejector are fixedly connected. The first ejector forms a first ejection channel. A primary air channel is formed between the nozzle and the first ejection channel. The second ejector forms a second ejection channel. A secondary air channel is formed between the first ejection channel and the second ejection channel. An air inlet is provided on the second ejector, and the air inlet is connected to the secondary air channel. The first ejector tube has a first mounting portion disposed on the outer peripheral wall of the first ejector channel. The second ejector tube includes a second mounting portion that cooperates with the first mounting portion. The first ejector tube is at least partially sleeved within the second mounting portion. The second mounting portion has the air inlet. The burner also includes a sleeve fitted onto the second mounting portion, with the first ejector tube located inside the sleeve. The sleeve is rotatable around the central axis to open or close the air inlet.

2. The burner according to claim 1, characterized in that, The first ejector tube is at least partially fitted inside the second ejector tube.

3. The burner according to claim 1, characterized in that, The second mounting portion includes a plurality of plates spaced apart, which cooperate with the first mounting portion, and the plurality of plates form the air inlets spaced apart along the circumference of the second ejector tube.

4. The burner according to claim 1, characterized in that, The second mounting part is disposed at one end of the second ejection channel, and the first mounting part is sleeved inside the second mounting part.

5. The burner according to claim 4, characterized in that, The first mounting part protrudes from the outer peripheral wall of the first ejector channel toward the outside of the first ejector channel, and the second mounting part extends from one end of the second ejector channel along the central axis toward the side where the first ejector tube is located.

6. The burner according to claim 1, characterized in that, One of the first mounting portion and the second mounting portion has a protrusion, and the other has a groove. The groove engages with the protrusion to limit the relative position of the first ejector tube and the second ejector tube.

7. The burner according to claim 1, characterized in that, The sleeve includes a first shielding portion configured to open or close the air inlet when the sleeve rotates about the central axis.

8. The burner according to claim 1, characterized in that, The burner includes a damper plate mounted on the first ejector tube, the nozzle mounted on the damper plate, the damper plate having a notch communicating with the primary air passage, and the sleeve being rotatable about the central axis to open or close the notch.

9. The burner according to claim 8, characterized in that, The sleeve includes a second blocking portion configured to open or close the notch when the sleeve rotates about the central axis.

10. The burner according to claim 1, characterized in that, The first ejector tube is trumpet-shaped.

11. The burner according to claim 1, characterized in that, The first ejector channel includes a first ejector section and a second ejector section connected in sequence. The first ejector section gradually narrows from the side where the nozzle is located to the side where the second ejector section is located, and the diameter of the second ejector section is smaller than the diameter of the first ejector section.

12. The burner according to claim 1, characterized in that, The second ejector channel includes a third ejector segment, a fourth ejector segment, and a fifth ejector segment connected in sequence. The diameter of the third ejector segment is larger than the diameter of the fourth ejector segment, and the diameter of the fifth ejector segment is larger than the diameter of the fourth ejector segment.

13. A gas stove, characterized in that, The gas stove includes the burner as described in any one of claims 1-12.

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