A burner for a gas hob

Abstract

The invention relates to a burner for a gas stove, comprising a base, a connecting body arranged on the base, a transmission channel arranged on the connecting body, and a fire cover arranged on the connecting body, characterized in that at least one flow stabilizing member is arranged upstream of the air inlet end of each ejector pipe, the flow stabilizing member having a flow stabilizing part capable of stabilizing the air flow, and the outer ejector and / or the inner ejector extend into the respective flow stabilizing member. Compared with the prior art, the invention has the advantages that a flow stabilizing member is arranged upstream of the air inlet end of each ejector pipe, the flow stabilizing member has a flow stabilizing part capable of stabilizing the air flow, the flow stabilizing part is beneficial to the uniform air flow to the entire circumferential direction of the air inlet end of the ejector pipe, and is beneficial to the smooth air flow, and the ejector also extends into the respective flow stabilizing member, so that the energy loss caused by the sudden expansion of the cross-sectional area when the air flow flows into the air inlet end of the ejector pipe can be avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of household kitchen utensils, in particular to a burner for a gas stove. BACKGROUND

[0002] The existing gas appliance products include household gas stoves, heaters, barbecue grills, etc., and the infrared gas burner is usually biased to one side due to the effect of air flow during the combustion process, so that the heat of the infrared combustion disc is uneven, causing uneven heating of the pot body, affecting use. Therefore, a patent No. 201420547933.8 (authorized publication No. CN204285466U) of Chinese utility model patent "infrared burner with flow stabilizer" is provided, the burner is provided with a flow stabilizer in the double-ring combustion chamber, and the plate-shaped flow stabilizer can be provided with one or more layers as needed to ensure the stability of the air flow and avoid the problem of backfire; or the present applicant found that the structure itself is limited and is easily disturbed by the surrounding air flow when developing the updraft burner, which causes unstable flame, so a kind of updraft burner is applied for, the updraft burner is provided with a flow regulating assembly on the outer circumferential side of the inner ring nozzle, the flow regulating assembly has an air inlet channel, and the axis of the air outlet of the air inlet channel and the axis of the gas injection port of the inner ring nozzle do not intersect, so that when the inner ring nozzle injects gas, the external air first enters the flow stabilization area on the outer circumferential side of the inner ring nozzle through the air inlet channel of the flow regulating assembly, and the air flow does not directly hit the inner ring nozzle. When the air flow of the external air is chaotic, the disturbance of the external air flow to the air flow near the inner ring nozzle is reduced under the action of the flow regulating assembly, which not only ensures the normal injection of air, but also ensures the stability of the flame of the burner, avoids the backfire phenomenon, improves the user experience, and reduces the occurrence of safety problems. Although the flow regulating assembly reduces the disturbance of the external air flow to the air flow near the inner ring nozzle, the updraft burner with the transversely arranged injection pipe and nozzle on the market has the problem that when the cross-sectional area of the flow channel suddenly changes, the uniform flow is destroyed, causing changes in the size, direction or distribution of the flow velocity, and the energy loss caused thereby is called local loss, also known as local resistance. For example, the drawings in the specification show that when the fluid flows from the 1-1 cross section to the 2-2 cross section, part of the fluid collides with the wall of the 2-2 cross section to change direction, thereby generating vortex at the 2-2 cross section; and the drawings in the specification show that when the fluid flows from the 1-1 cross section to the 2-2 cross section, the vortex zone is formed outside the main flow, causing vortex loss. Figure 1 Figure 2

[0003] This vortex loss situation corresponds to the existing burner structure Figure 3 ​​As shown, the upper air inlet burner with the transversely arranged nozzle, when the air flows, there are cases of sudden increase in cross-sectional area and sudden decrease in cross-sectional area. There are eddies at the places where the cross-sectional area changes suddenly, which makes the velocity field of the air mixture unstable. The air mixing chamber assembly, the bottom cup and the base assembly form a closed pipe. The air enters the closed pipe under the entrainment of the gas. At section 1-1, the pipe cross-sectional area suddenly expands, generating eddy 1. At section 3-3, the pipe cross-sectional area suddenly decreases, generating eddy 3. The existence of eddy 1 and eddy 3 makes the velocity field in a disordered state, the combustion is unstable, the flame is long and short, and it is easy to cause incomplete combustion and excessive smoke emission. SUMMARY

[0004] The first technical problem to be solved by the present application is to provide a burner for gas stove which can avoid the eddy caused by the sudden change of cross-sectional area of the air flow passage.

[0005] The second technical problem to be solved by the present application is to provide a burner for gas stove which can avoid the mutual interference caused by the transverse arrangement of the nozzles.

[0006] The technical scheme adopted by the present application to solve the first technical problem is as follows: the burner for gas stove comprises

[0007] a base having a concave cavity with an opening facing upward;

[0008] a connecting body arranged above the base and comprising a plate body, the outer periphery of the plate body extending in the horizontal direction and covering the concave cavity;

[0009] at least two transmission channels arranged on the connecting body; and

[0010] a fire cap arranged above the connecting body and forming a central air mixing chamber in the center and a peripheral air mixing chamber in the periphery between the transmission channels;

[0011] characterized in that:

[0012] the concave cavity of the base surrounds a central draft tube communicating with the central air mixing chamber and a peripheral draft tube communicating with the peripheral air mixing chamber, the gas inlet end of the peripheral draft tube is provided with an outer injector, and the gas inlet end of the central draft tube is provided with an inner injector, and at least one flow stabilizing member is arranged upstream of the gas inlet end of each draft tube, the flow stabilizing member has a flow stabilizing part capable of stabilizing the airflow, and the outer injector and / or the inner injector extends into the respective flow stabilizing member.

[0013] In order to realize the independent fire discharge of the central gas mixing chamber and the peripheral gas mixing chamber, and to enable the user to independently control the outer ring fire and the inner ring fire, preferably, the central injection pipe and the peripheral injection pipe are formed by the shape-fitting upper pipe body and lower pipe body, the lower pipe body is formed by the partial concave bottom of the corresponding bottom of the surrounding cavity, and the upper pipe body is formed by the central concave from bottom to top of the connecting body, wherein the end of the lower pipe body of the peripheral injection pipe is an open end and communicates with the concave cavity, and the end of the lower pipe body of the central injection pipe is a closed end and does not communicate with the concave cavity, but communicates with the central gas mixing chamber through its own corresponding transmission channel, and along the flow direction of the gas flow, the base is provided with a limiting base platform for limiting the flow stabilizing piece upstream of the partial concave bottom, and the inner injector and the outer injector are arranged on the nozzle seat resting on the limiting base platform. Since the central injection pipe and the peripheral injection pipe are formed by the shape-fitting upper pipe body and lower pipe body, in order to set the flow stabilizing piece during processing, and also in order to rest the nozzle seat provided with the inner injector and the outer injector on the base, only the connecting body needs to be lifted upward.

[0014] In order to solve the second technical problem, preferably, the flow stabilizing piece further includes a partition sheet part located on the side of the flow stabilizing part, the partition sheet part is U-shaped and includes a first partition plate separating the inner injector and the outer injector, a second partition plate spaced apart from the first partition plate, and a connecting plate connecting the first partition plate and the second partition plate, the connecting plate is provided with a matching part capable of cooperating with the limiting base platform, and correspondingly, the flow stabilizing part is connected to the first partition plate. By the first partition plate and the second partition plate spaced apart in the partition sheet part of the flow stabilizing piece, the inner injector is in a relatively independent space, so as to separate the inner injector and the outer injector, thereby avoiding the influence of the gas flow between the inner injector and the outer injector.

[0015] In order to facilitate the one-time air supplement to the fire cover, preferably, the lower sealing plate for sealing the body of the fire cover is arranged between the fire cover and the connecting body, and the air passage communicating with the outside is formed between the lower sealing plate and the base, and the part of the base corresponding to the limiting base platform is an open part communicating with the air passage.

[0016] In order to avoid the primary air in the process of air supplementing in a disorderly state, combustion instability, flame long and short, easy to cause incomplete combustion, flue gas emission exceeds the standard, preferably, the flow stabilizing component comprises a first flow stabilizing plate into which the outer injector and / or the inner injector extends, the upper end of the first flow stabilizing plate extends along the intake port end of the corresponding ejector pipe to form an upper extension section, and the lower end of the first flow stabilizing plate also extends along the intake port end of the corresponding ejector pipe to form a lower extension section, the length of the lower extension section is shorter than that of the upper extension section, an angle α is formed between the upper extension section and the first flow stabilizing plate, and 120°≤α≤150°, an angle β is formed between the lower extension section and the first flow stabilizing plate, and 100°≤β≤110°. In this way, the upper extension section and the lower extension section use the "Venturi effect" to change the disorderly vortex into an orderly state, thereby facilitating smooth air flow. The "Venturi effect" referred to in the present application refers to the fact that when wind blows over an obstruction, the air pressure above the leeward side of the obstruction near the port is relatively low, thereby generating a negative pressure zone and causing air flow.

[0017] In order to utilize the "Venturi effect" to change the disorderly vortex into an orderly state, preferably, the first flow stabilizing plate is provided with an extension inlet into which the outer injector and / or the inner injector extends, and the first flow stabilizing plate, the upper extension section and the lower extension section together form a semi-closed first obstruction cavity with the first flow stabilizing plate. Due to the obstruction of the first flow stabilizing plate, the first air flow between the lower sealing plate and the upper extension section and the second air flow between the lower extension section and the nozzle seat can flow rapidly under the negative pressure generated by the fuel gas injected by the injector, so that the outer side of the upper extension section and the lower extension section can form a first negative pressure zone and a second negative pressure zone, respectively, thereby ultimately realizing the bending of the first air flow and the second air flow along the upper extension section to flow downward along the first flow stabilizing plate, and the second air flow flowing upward along the lower extension section to the intake port end of the corresponding ejector pipe to combine with the first air flow. Since the cross section of the ejector pipe includes a converging portion with a gradually decreasing opening diameter along the flow direction of the air flow, the external air flow will generate vortex when passing through the cross section change of the ejector pipe. In this way, the "Venturi effect" is cleverly utilized by the obstruction of the first flow stabilizing plate, the upper extension section and the lower extension section, so that the outer side of the upper extension section and the lower extension section can form a first negative pressure zone and a second negative pressure zone, respectively, thereby ultimately realizing the combination of the first air flow and the second air flow to the intake port end of the corresponding ejector pipe.

[0018] In addition to achieving flow stabilization on the first flow stabilizer plate, it is preferable to also achieve flow stabilization at the air inlet end adjacent to the ejector tube. To achieve a smoother flow of outside air into the air inlet end of the ejector tube, the flow stabilization component preferably includes a second flow stabilizer plate located downstream of the first flow stabilizer plate. The second flow stabilizer plate is connected to the first flow stabilizer plate by a connecting rib, which has a flow channel for airflow. The upper end of the second flow stabilizer plate also extends along the air inlet end away from the corresponding ejector tube with an upper extension parallel to the limiting base. The lower end of the second flow stabilizer plate also extends along the air inlet end away from the corresponding ejector tube with a lower extension. An angle γ is formed between the upper extension and the second flow stabilizer plate, and 80°≤γ≤90°. An angle δ is formed between the lower extension and the second flow stabilizer plate, and 140°≤δ≤150°. The upper extension of the second flow stabilizer plate is higher than the upper extension section of the first flow stabilizer plate, and the lower extension of the second flow stabilizer plate is higher than the lower extension section of the first flow stabilizer plate. This configuration allows it to better align with the airflow path.

[0019] Furthermore, the second flow stabilizer, the upper extension, and the lower extension together form a semi-enclosed second obstruction cavity with the second flow stabilizer. Due to the obstruction of the second flow stabilizer, under the negative pressure generated by the gas ejected from the injector, the third airflow located between the lower sealing plate and the upper extension and the fourth airflow located between the lower extension and the base can flow rapidly, so that the outer side of the lower extension can form a third negative pressure zone respectively. Thus, the third and fourth airflows bend along the upper extension and descend along the second flow stabilizer. The fourth airflow then descends along the lower extension to merge with the third airflow at the inlet end of the corresponding ejector tube. This cleverly utilizes the obstruction of the second flow stabilizer, the upper extension, and the lower extension to create a "Venturi effect," so that the outer side of the lower extension can form a third negative pressure zone respectively, thus ultimately achieving the merging of the third and fourth airflows at the inlet end of the corresponding ejector tube.

[0020] To facilitate cleaning of the flame cap, it is designed to be detachable. Preferably, the flame cap includes an annular body. A mixing chamber is formed between the annular top wall of the body and the inner and outer annular walls extending vertically or obliquely downward from the inner and outer edges of the annular top wall. The lower end face of the outer annular wall of the body has multiple main flame grooves radially formed around the circumference, and a partition is formed between adjacent main flame grooves. The partition has a flame-stabilizing groove that is concave from the inside out and from the bottom up. The flame-stabilizing groove has a flared section near the outer side. The flame-stabilizing groove formed by the partition can stabilize the main flame formed by the main flame groove, and the flared section on the outer side of the flame-stabilizing groove can better hold the flame outlet end of the main flame formed by the main flame groove.

[0021] To facilitate the supply of air to the inner and outer injectors, preferably, the nozzle seat is connected to an inner air supply channel for supplying air to the inner injector and an outer air supply channel for supplying air to the outer injector, wherein the inner and outer air supply channels are connected.

[0022] Compared with the prior art, the advantages of the present invention are: a burner with a flow stabilizer provided upstream of the air inlet end of each injector tube, the flow stabilizer having a flow stabilizing part that can stabilize the airflow, the arrangement of the flow stabilizing part is conducive to the uniform flow of airflow in the entire outer circumference of the air inlet end of the injector tube, which is conducive to stabilizing the airflow, and each injector extends into its respective flow stabilizer, which can avoid energy loss caused by the sudden expansion or contraction of the cross-sectional area when the airflow flows into the air inlet end of the injector tube. Attached Figure Description

[0023] Figure 1 The background art of this invention shows a fluid channel with a suddenly narrowed cross-section;

[0024] Figure 2 The background art of this invention shows a fluid channel with a suddenly increased cross-section;

[0025] Figure 3 The present invention relates to a burner structure with vortex flow in the background art.

[0026] Figure 4 This is a schematic diagram of the burner structure in an embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram showing the structure of the limiting base for the burner (nozzle seat omitted) in an embodiment of the present invention;

[0028] Figure 6 for Figure 5 A schematic diagram of the decomposed structure;

[0029] Figure 7 This is a schematic diagram of the current stabilizing element in an embodiment of the present invention;

[0030] Figure 8 This is a side sectional view of the current stabilizer in an embodiment of the present invention;

[0031] Figure 9 This is a schematic diagram of the flow stabilization achieved by the flow stabilizing device in an embodiment of the present invention;

[0032] Figure 10 for Figure 9 A schematic diagram of a partial structure;

[0033] Figure 11 This is a schematic diagram of the structure of the lower tube body shown in an embodiment of the present invention;

[0034] Figure 12This is a schematic diagram of the upper tube structure of the connector in an embodiment of the present invention;

[0035] Figure 13 This is a schematic diagram of the structure of the flame cap body in an embodiment of the present invention;

[0036] Figure 14 This is a schematic diagram of the nozzle seat in an embodiment of the present invention. Detailed Implementation

[0037] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0038] like Figures 4 to 14 The diagram shows the preferred embodiment of the present invention. The burner for a gas stove in this embodiment includes a base 1 with an upward-facing recessed cavity 11, and a connecting body 2 disposed on the base 1. The connecting body 2 includes a plate whose outer periphery extends horizontally and covers the recessed cavity 11 and at least two transmission channels 3 disposed on the connecting body. A burner cap is also disposed on the connecting body 2. A central mixing chamber 31 and an outer peripheral mixing chamber 32 are formed between the burner cap and the transmission channels 3. The recessed cavity 11 of the base 1 forms a connection with the central mixing chamber 31. The central ejector tube and the surrounding cavity 12 of the peripheral ejector tube connected to the peripheral mixing chamber 32 are provided. The air inlet end of the peripheral ejector tube is provided with an external ejector 4, and the air inlet end of the central ejector tube is provided with an internal ejector 5. It also includes at least one flow stabilizer 6 located upstream of the air inlet end of each ejector tube. The flow stabilizer 6 has a flow stabilizing part that can stabilize the airflow. The external ejector 4 and / or the internal ejector 5 extend into their respective flow stabilizers 6, which is conducive to the uniform flow of airflow in the entire outer circumference of the air inlet end of the ejector tube, and is conducive to stabilizing the airflow.

[0039] Specifically, in order to enable the central mixing chamber 31 and the peripheral mixing chamber 32 to ignite independently, and to allow the user to independently control the outer and inner ring flames, the central ejector tube and the peripheral ejector tube in this embodiment are formed by the matching upper tube body 13 and lower tube body 14. The lower tube body 14 is formed by a partial depression at the bottom corresponding to the surrounding cavity 12, and the upper tube body 13 is formed by a depression from bottom to top in the center of the connecting body 2. The end of the lower tube body 14 of the peripheral ejector tube is an open end that communicates with the concave cavity 11, while the end of the lower tube body 14 of the central ejector tube is a closed end that does not communicate with the concave cavity 11, but communicates with the central mixing chamber 31 through its corresponding transmission channel 3. Along the flow direction of the airflow, the base 1 is provided with a limiting base 15 upstream of the partial depression at the bottom for limiting the flow stabilizer 6. The inner injector 5 and the outer injector 4 are mounted on the nozzle seat 7 resting on the limiting base 15. Since the central ejector tube and the peripheral ejector tube are joined together by the upper tube body 13 and the lower tube body 14, in order to install the flow stabilizer 6 during the processing, and also to place the nozzle seat 7 with the inner injector 5 and the outer injector 4 on the base 1, it is only necessary to lift the connecting body 2 upwards. During the combustion process, the burner needs to replenish the air cap once. A lower sealing plate 8 is provided between the burner cap and the connecting body 2 to seal the burner cap body 91. An air passage 80 connecting the lower sealing plate 8 and the base 1 is formed to the outside. The part of the base 1 corresponding to the limiting base 15 is an open part 81 that communicates with the air passage 80.

[0040] Furthermore, a key feature of this embodiment is that the flow stabilizer 6 also includes a partition plate portion 62 located on the side of the flow stabilizer 61. The partition plate portion 62 is U-shaped and includes a first partition plate 621 separating the inner injector 5 and the outer injector 4, a second partition plate 622 spaced apart from the first partition plate 621, and a connecting plate 623 connecting the first partition plate 621 and the second partition plate 622. The connecting plate 623 is provided with a mating part that can be connected to the limiting base 15. Correspondingly, the flow stabilizer 61 is connected to the first partition plate 621. Through the first partition plate 621 and the second partition plate 622 spaced apart in the partition plate portion 62 of the flow stabilizer 6, the inner injector 5 can be placed in a relatively independent space to separate the inner injector 5 and the outer injector 4, thereby avoiding the influence of airflow between the inner injector 5 and the outer injector 4. Of course, to avoid the air being in a disordered state during the replenishment process, resulting in unstable combustion, fluctuating flame length, incomplete combustion, and excessive flue gas emissions, the flow stabilizing component 61 of the flow stabilizing component 6 can be correspondingly installed in the outer ejector tube and the central ejector tube. This embodiment is illustrated by taking the example of installing it only in the outer ejector tube:

[0041] The flow stabilizer 6 includes a first flow stabilizer plate 611 into which the external injector 4 and / or the internal injector 5 extend. The upper end of the first flow stabilizer plate 611 extends along the air inlet end away from the corresponding ejector tube, forming an upper extension section 612. The lower end of the first flow stabilizer plate 611 also extends along the air inlet end away from the corresponding ejector tube, forming a lower extension section 613. The length of the lower extension section 613 is shorter than that of the upper extension section 612. An angle α is formed between the upper extension section 612 and the first flow stabilizer plate 611, where α is selected as 13°. 0°, the lower extension 613 and the first flow stabilizer 611 form an angle β, and β is selected as 110°. In this way, the upper extension 612 and the lower extension 613 use the "Venturi effect" to turn the disordered vortex into an ordered state, which is conducive to stabilizing the air flow. The so-called "Venturi effect" in this application refers to the fact that when the wind blows over the obstruction, the air pressure is relatively low near the port on the leeward side of the obstruction, thereby creating a negative pressure zone, which in turn produces an adsorption effect and causes the air to flow. An inlet 610 for the external injector 4 to extend into is provided on the first flow stabilizer 611. The first flow stabilizer 611, the upper extension section 612, and the lower extension section 613 together form a semi-closed first blocking cavity 614 with the first flow stabilizer 611. Due to the blocking effect of the first flow stabilizer 611, under the negative pressure generated by the gas ejected from the injector, the first airflow A between the lower sealing plate 8 and the upper extension section 612 and the second airflow B between the lower extension section 613 and the nozzle seat 7 can flow rapidly, so that the outer sides of the upper extension section 612 and the lower extension section 613 can respectively form a first negative pressure zone E and a second negative pressure zone F. Thus, the first airflow A and the second airflow B bend along the upper extension section 612 and descend along the first flow stabilizer 611. The second airflow B then ascends along the lower extension section 613 to merge with the first airflow A at the air inlet end of the corresponding ejector tube.To utilize the Venturi effect to transform disordered vortices into an ordered state, the ejector tube's cross-section includes a constricted section with a gradually decreasing opening diameter along the airflow direction. This causes vortices to form as the external airflow passes through the cross-section of the ejector tube. This cleverly utilizes the obstruction of the first flow stabilizer 611, the upper extension 612, and the lower extension 613 to achieve the Venturi effect, creating a first negative pressure zone E and a second negative pressure zone F on the outer sides of the upper extension 612 and lower extension 613, respectively. This ultimately allows the first airflow A and the second airflow B to converge at the corresponding ejector tube inlet. The flow stabilizer 61 also includes components located on the first flow stabilizer plate. Downstream of 611, there is a second flow stabilizer 615. The second flow stabilizer 615 is connected to the first flow stabilizer 611 by a connecting rib 616. The connecting rib 616 is provided with a flow channel 617 for airflow. The upper end of the second flow stabilizer 615 also extends along the air inlet end away from the corresponding ejector tube and has an upper extension 618 that is parallel to the limiting base 15. The lower end of the second flow stabilizer 615 also extends along the air inlet end away from the corresponding ejector tube and has a lower extension 619. An angle γ is formed between the upper extension 618 and the second flow stabilizer 615, and γ is selected as 90°. An angle δ is formed between the lower extension 619 and the second flow stabilizer 615, and δ is selected as 140°. Figure 8 As shown, the upper extension 618 of the second flow stabilizer 615 is set higher than the upper extension 612 of the first flow stabilizer 611, and the lower extension 619 of the second flow stabilizer 615 is set higher than the lower extension 613 of the first flow stabilizer 611. The overall size of the second flow stabilizer 615 is smaller than that of the first flow stabilizer, so as to better conform to the flow path of the airflow. In this way, in addition to achieving flow stabilization on the first flow stabilizer 611, the airflow can also be stabilized at the position near the air inlet end of the ejector tube, so as to ultimately achieve a smoother flow of outside air into the air inlet end of the ejector tube. The second flow stabilizer 615, the upper extension 618, and the lower extension 619 together form a semi-enclosed second obstruction cavity 620 with the second flow stabilizer 615. Due to the obstruction of the second flow stabilizer, under the negative pressure generated by the gas ejected from the injector, the third airflow C located between the lower sealing plate 8 and the upper extension 618 and the fourth airflow D located between the lower extension 619 and the base 1 can flow rapidly, so that the outer side of the lower extension 619 can respectively form a third negative pressure zone G, thereby ultimately realizing that the third airflow C and the fourth airflow D bend along the upper extension 612 and descend along the second flow stabilizer 615. The fourth airflow D then descends along the lower extension 619 to merge with the third airflow C at the air inlet end of the corresponding ejector tube. This ingenious method also utilizes the obstruction of the second flow stabilizer 615, the upper extension 618, and the lower extension 619 to create the "Venturi effect," which allows the outer side of the lower extension 619 to form a third negative pressure zone G, thereby ultimately enabling the third airflow C and the fourth airflow D to merge at the inlet end of the corresponding ejector tube.

[0042] Finally, to facilitate cleaning of the flame cap, it is designed to be detachable. Preferably, the flame cap includes an annular body 91. A mixing chamber 95 is formed between the annular top wall 92 of the body 91 and the inner annular wall 93 and outer annular wall 94 extending vertically or obliquely downward from the inner and outer edges of the annular top wall 92. The lower end face of the outer annular wall 94 of the body 91 is radially formed with multiple main flame grooves 96 around the circumference. A partition block 97 is formed between adjacent main flame grooves 96. The partition block 97 is formed with a flame stabilizing groove 98 that is concave from the inside out and from the bottom up. The flame stabilizing groove 98 has a flared section 99 near the outer side. The flame stabilizing groove 98 formed by the partition block 97 can stabilize the main flame formed by the main flame groove 96, and the flared section 99 on the outer side of the flame stabilizing groove 98 can better hold the flame outlet end of the main flame formed by the main flame groove 96. The nozzle seat 7 is connected to an internal air supply channel 100 for supplying air to the internal injector 5 and an external air supply channel 200 for supplying air to the external injector 4. The internal air supply channel 100 and the external air supply channel 200 are connected to facilitate the supply of air to the internal injector 5 and the external injector 4.

[0043] In summary, the external primary air forms vortex 1 and vortex 3 as described in the background art due to the cross-sectional change from the base 1 to the air inlet end of the ejector tube. The flow stabilization principle of the burner of this gas stove is as follows: Figure 8 , 9 As shown in Figure 10, the details are as follows:

[0044] ① The outside air is divided into upper air above the first flow stabilizer 611 and lower air below the first flow stabilizer 611. When the upper air flows towards the air inlet end of the corresponding ejector tube, it can form a first negative pressure zone E through the upper extension section 612 of the first flow stabilizer 611 and the upper extension section 618 of the second flow stabilizer 615 and the outer side of the upper extension section 612. It is gradually divided into a first air flow A, a third air flow C and a fourth air flow D, while the lower air flow corresponds to the second air flow B.

[0045] ② According to the Venturi effect, when the second airflow B collides with the first flow stabilizer 611, a second negative pressure zone F can be formed on the outer side of the lower extension 613 of the first flow stabilizer 611, so that the second airflow B flows towards the second negative pressure zone F, thereby avoiding the formation of the first vortex.

[0046] ③ After the fourth airflow D encounters the second flow stabilizer 615, according to the Venturi effect, a third negative pressure zone G can be formed on the outer side of the lower extension 619 of the second flow stabilizer 615. Due to the formation of the third negative pressure zone G, the third airflow C can flow towards the third negative pressure zone G, thereby avoiding the generation of the third vortex. This allows the primary air from the outside to enter the inlet end of the ejector tube evenly and smoothly.

Claims

1. A burner for a gas stove, comprising: The base (1) has an upward-facing concave cavity (11); The connecting body (2) is disposed on the base (1) and includes a plate, the outer periphery of which extends in the horizontal direction and can cover the cavity (11); At least two transmission channels (3) are respectively disposed on the connector (2); and The flame cap is disposed on the connecting body (2) and forms a central mixing chamber (31) in the center and an outer mixing chamber (32) in the periphery between it and the transmission channel (3). Its features are: The cavity (11) of the base (1) encloses a cavity (12) for a central ejector tube communicating with the central mixing chamber (31) and a peripheral ejector tube communicating with the peripheral mixing chamber (32). An external ejector (4) is provided at the air inlet end of the peripheral ejector tube, and an internal ejector (5) is provided at the air inlet end of the central ejector tube. It also includes at least one flow stabilizer (6) located upstream of the air inlet end of each ejector tube. The flow stabilizer (6) has a flow stabilizing part that can stabilize the airflow. The external ejector (4) and / or the internal ejector (5) extend into their respective flow stabilizers (6). The flow stabilizer (6) also includes a partition plate portion (62) located on the side of the flow stabilizer (61). The partition plate portion (62) is U-shaped and includes a first partition plate (621) that separates the inner injector (5) and the outer injector (4), a second partition plate (622) that is spaced apart from the first partition plate (621), and a connecting plate (623) that connects the first partition plate (621) and the second partition plate (622). The connecting plate (623) is provided with a mating part that can be connected to the limiting base (15). Correspondingly, the flow stabilizer (61) is connected to the first partition plate (621). The flow stabilizing component (61) includes a first flow stabilizing plate (611) into which the external injector (4) and / or internal injector (5) extend. The upper end of the first flow stabilizing plate (611) extends along the air inlet end away from the corresponding ejector tube and has an upper extension section (612). The lower end of the first flow stabilizing plate (611) also extends along the air inlet end away from the corresponding ejector tube and has a lower extension section (613). The length of the lower extension section (613) is shorter than that of the upper extension section (612). An angle α is formed between the upper extension section (612) and the first flow stabilizing plate (611), and 120°≤α≤150°. An angle β is formed between the lower extension section (613) and the first flow stabilizing plate (611), and 100°≤β≤110°.

2. The burner for a gas stove according to claim 1, characterized in that: The central ejector tube and the peripheral ejector tube are formed by the fitting of an upper tube body (13) and a lower tube body (14). The lower tube body (14) is formed by a partial depression at the bottom corresponding to the cavity (12). The upper tube body (13) is formed by a depression from the center of the connecting body (2) from bottom to top. The end of the lower tube body (14) of the peripheral ejector tube is an open end and communicates with the cavity (11). The end of the lower tube body (14) of the central ejector tube is a closed end and does not communicate with the cavity (11). Instead, it communicates with the central mixing chamber (31) through its corresponding transmission channel (3). Along the flow direction of the airflow, the base (1) is provided with a limiting base (15) upstream of the partial depression at the bottom for limiting the flow stabilizer (6). The inner injector (5) and the outer injector (4) are mounted on the nozzle seat (7) placed on the limiting base (15).

3. The burner for a gas stove according to claim 2, characterized in that: A lower sealing plate (8) for sealing the flame cap body (91) is provided between the flame cap and the connecting body (2), and an air passage (80) connecting the lower sealing plate (8) and the base (1) is formed between them. The part of the base (1) corresponding to the limiting base (15) is an open part (81) that connects to the air passage (80).

4. The burner for a gas stove according to claim 3, characterized in that: The first flow stabilizer (611) has an inlet (610) for the external injector (4) and / or the internal injector (5) to extend into. The first flow stabilizer (611), the upper extension section (612), and the lower extension section (613) together form a semi-closed first blocking cavity (614) with the first flow stabilizer (611). Due to the obstruction of the first flow stabilizer (611), under the negative pressure generated by the gas ejected from the injector, the first airflow (A) located between the lower sealing plate (8) and the upper extension section (612) and the lower... The second airflow (B) between the extension section (613) and the nozzle seat (7) can flow rapidly, so that the outer sides of the upper extension section (612) and the lower extension section (613) can respectively form a first negative pressure zone (E) and a second negative pressure zone (F), thereby ultimately realizing that the first airflow (A) and the second airflow (B) bend along the upper extension section (612) and descend along the first flow stabilizer (611), and the second airflow (B) then ascends along the lower extension section (613) to merge with the first airflow (A) at the air inlet end of the corresponding ejector tube.

5. The burner for a gas stove according to claim 4, characterized in that: The flow stabilizing component (61) further includes a second flow stabilizing plate (615) located downstream of the first flow stabilizing plate (611). The second flow stabilizing plate (615) is connected to the first flow stabilizing plate (611) via a connecting rib (616). The connecting rib (616) is provided with a flow channel (617) for airflow. The upper end of the second flow stabilizing plate (615) also extends along the air inlet end away from the corresponding ejector tube and has an upper extension portion (618) arranged parallel to the limiting base (15). The lower end of the second flow stabilizing plate (615) also extends along the air inlet end away from the corresponding ejector tube. The upper extension (618) and the second flow stabilizer (615) form an angle γ, where 80°≤γ≤90°, and the lower extension (619) and the second flow stabilizer (615) form an angle δ, where 140°≤δ≤150°. The upper extension (618) of the second flow stabilizer (615) is higher than the upper extension (612) of the first flow stabilizer (611), and the lower extension (619) of the second flow stabilizer (615) is higher than the lower extension (613) of the first flow stabilizer (611).

6. The burner for a gas stove according to claim 5, characterized in that: The second flow stabilizer (615), the upper extension (618), and the lower extension (619) together form a semi-closed second blocking cavity (620) with the second flow stabilizer (615). Due to the blocking effect of the second flow stabilizer (615), under the negative pressure generated by the gas ejected from the injector, the third airflow (C) between the lower sealing plate (8) and the upper extension (618) and the fourth airflow (D) between the lower extension (619) and the base (1) can flow rapidly, so that the outer side of the lower extension (619) can form a third negative pressure zone (G) respectively. Thus, the third airflow (C) and the fourth airflow (D) bend along the upper extension (612) and go down along the second flow stabilizer (615). The fourth airflow (D) then goes down along the lower extension (619) to merge with the third airflow (C) at the air inlet end of the corresponding ejector tube.

7. The burner for a gas stove according to any one of claims 1 to 6, characterized in that: The flame cap includes an annular body (91). A gas mixing chamber (95) is formed between the annular top wall (92) of the body (91) and the inner annular wall (93) and outer annular wall (94) extending vertically or obliquely downward from the inner and outer edges of the annular top wall (92). The lower end face of the outer annular wall (94) of the body (91) is radially formed with a plurality of main flame grooves (96) around the circumference. A partition (97) is formed between adjacent main flame grooves (96). The partition (97) is formed with a flame stabilizing groove (98) that is concave from the inside to the outside and from the bottom to the top. The flame stabilizing groove (98) has a flared section (99) near the outside.

8. The burner for a gas stove according to claim 7, characterized in that: The nozzle seat (7) is connected to an internal air supply channel (100) for supplying air to the internal injector (5) and an external air supply channel (200) for supplying air to the external injector (4), wherein the internal air supply channel (100) and the external air supply channel (200) are connected to each other.

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