Burner for stove and gas stove

Abstract

The present invention provides a burner for stoves that has a simple structure and is easy to process. A burner for stoves includes a burner body, wherein the burner body is provided with a gas mixing cavity, a fire hole, and a trapped vortex cavity. One end of the fire hole is connected to the outside of the burner body, and the trapped vortex cavity is connected to the other end of the fire hole and the gas mixing cavity. The chamber volume of the trapped vortex cavity is smaller than the chamber volume of the gas mixing cavity, and the chamber volume of the trapped vortex cavity is larger than the chamber volume of the fire hole. By providing a trapped vortex cavity, the present invention forms a vortex at the location of the trapped vortex cavity when the gas-air mixture introduced into the gas mixing cavity flows through the fire hole, thereby slowing down the speed of the gas-air mixture flowing through the fire hole and improving flame stability. The burner for stoves does not require a low flame to stabilize the flame, thereby avoiding a short and flat flame that affects the flame utilization rate and the thermal efficiency of the burner.

Description

Technical Field

[0001] The present invention relates to a burner, in particular to a burner for a stove, and belongs to the technical field of burners. Background Art

[0002] The flame stability of a stove burner is one of its important indicators. To improve the flame stability of a stove burner, the existing technology usually adopts the method of setting a flame stabilization groove or a small hole flame stabilization method. This flame stabilization method easily causes the burner flame to be short and flat, affecting the heating effect on the bottom of the pot and reducing thermal efficiency. Summary of the Invention

[0003] Based on the above background, the object of the present invention is to provide a burner for a stove with a simple structure and easy processing, which adopts the trapped vortex flame stabilization combustion technology to improve the flame stability and enhance the thermal efficiency of the burner.

[0004] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0005] A burner for a stove includes a burner body, wherein the burner body is provided with an air mixing cavity, a fire hole, and a trapped vortex cavity. One end of the fire hole is connected to the outside of the burner body, and the trapped vortex cavity is connected to the other end of the fire hole and the air mixing cavity. The chamber volume of the trapped vortex cavity is smaller than the chamber volume of the air mixing cavity, and the chamber volume of the trapped vortex cavity is larger than the chamber volume of the fire hole.

[0006] By setting up a trapped vortex cavity, when the gas-air mixture introduced into the gas mixing cavity flows through the fire hole, a vortex is formed at the location of the trapped vortex cavity, which slows down the speed of the gas-air mixture flowing through the fire hole, thereby improving the stability of the flame formed by the combustion of the gas-air mixture at the connection part between the fire hole and the outside of the burner body.

[0007] Preferably, the trapped vortex cavity extends along the circumference of the burner body; in the longitudinal cross-section of the stove burner, the minimum dimension of the trapped vortex cavity in the height direction is greater than the minimum dimension of the fire hole in the height direction.

[0008] Preferably, the burner body is provided with an air distribution plate and a fire cover, the air distribution plate is provided with at least two annular walls protruding from the surface of the air distribution plate, the fire cover is provided above the air distribution plate, the bottom of the fire cover or the portion of the fire cover adjacent to the bottom is in contact with the top of the annular wall, the space enclosed by the fire cover and the air distribution plate is configured as the air mixing cavity, the fire hole is provided in the fire cover, and the trapped vortex cavity is formed in the fire cover.

[0009] Preferably, the fire cover includes a first layer and a second layer, the bottom of the first layer or the portion of the first layer adjacent to the bottom abuts against the outer annular wall of the gas distribution plate, and the bottom of the second layer or the portion of the second layer adjacent to the bottom abuts against the inner annular wall of the gas distribution plate; at least one of the first layer and the second layer is provided with an annular groove extending circumferentially along the burner body, the top wall of the annular groove is connected to the hole wall of the fire hole, and the cavity corresponding to the annular groove is configured as the trapped vortex cavity.

[0010] Preferably, the junction between the top wall of the annular groove and the hole wall of the fire hole is configured as the outer contour corresponding to the inlet of the fire hole; the inlet of the trapped vortex chamber is directly connected to the mixing cavity, and the inlet of the trapped vortex chamber and the inlet of the fire hole are at least partially staggered.

[0011] Preferably, the first layer and the second layer are both provided with the annular groove, the annular groove provided on the first layer is defined as the first annular groove, and the annular groove provided on the second layer is defined as the second annular groove, at least part of the first annular groove and at least part of the second annular groove are distributed left and right and arranged opposite to each other, one of the first annular groove and the second annular groove is an annular groove without a bottom wall, and the other annular groove is an annular groove with a bottom wall; the trapped vortex cavity includes a first inlet, and there is a spacing between the free end of the bottom wall corresponding to the annular groove with a bottom wall and the side wall of the annular groove without a bottom wall, and the space formed by the spacing between the free end of the bottom wall corresponding to the annular groove with a bottom wall and the side wall of the annular groove without a bottom wall is configured as the first inlet of the trapped vortex cavity; the first inlet of the trapped vortex cavity is at least partially arranged opposite to the top wall of the annular groove without a bottom wall.

[0012] Preferably, the first layer and the second layer are both provided with the annular groove, the annular groove provided in the first layer is defined as the first annular groove, and the annular groove provided in the second layer is defined as the second annular groove, at least part of the first annular groove and at least part of the second annular groove are distributed left and right and arranged opposite to each other, and both the first annular groove and the second annular groove are annular grooves with bottom walls; the trapped vortex cavity includes a first inlet, and there is a spacing between the free end of the bottom wall corresponding to the first annular groove and the free end of the bottom wall corresponding to the second annular groove, and the space formed by the spacing between the free end of the bottom wall corresponding to the first annular groove and the free end of the bottom wall corresponding to the second annular groove is configured as the first inlet of the trapped vortex cavity.

[0013] Preferably, the fire cover includes a through hole, a first opening of the through hole is formed on the bottom wall corresponding to the annular groove having a bottom wall; the first opening of the through hole is configured as the second inlet of the trapped vortex cavity.

[0014] Preferably, at least one of the first layer and the second layer is provided with a protrusion; the first layer and the second layer are in contact with each other via the protrusion.

[0015] Preferably, the fire hole is in the shape of a circular hole, a long slot or a ring; when the fire hole is in the shape of a circular hole or a long slot, the fire holes are evenly spaced along the circumference of the fire cover with the central axis of the fire cover as the center, and the trapped vortex cavity extends along the circumference of the fire cover.

[0016] Preferably, the number of the fire holes is at least two groups, the number of the gas mixing cavities is at least two, at least one gas mixing cavity surrounds the outside of at least another gas mixing cavity, each group of fire holes connects a gas mixing cavity and the outside of the burner body, the number of the trapped vortex cavity is at least one, and at least one group of fire holes connects the trapped vortex cavity.

[0017] A gas cooker comprises any one of the above-mentioned burners for the cooker.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] A burner for a stove of the present invention is provided with a trapped vortex cavity. When the gas-air mixture introduced into the gas mixing cavity flows through the fire hole, a vortex is formed at the location of the trapped vortex cavity, thereby slowing down the speed of the gas-air mixture flowing through the fire hole and improving the flame stability. The burner for the stove does not need to be kept at a low flame to stabilize the flame, thereby avoiding a short and flat flame that affects the flame utilization rate and the thermal efficiency of the burner. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the burner for the stove of the present invention;

[0022] Figure 2 This is a schematic diagram of the internal structure of a first embodiment of a burner for a stove according to the present invention;

[0023] Figure 3 This is a schematic diagram of the interior of a structure of an outer ring trapped vortex cavity in the present invention;

[0024] Figure 4 1 is an internal schematic diagram of another structure of the outer ring trapped vortex cavity in the present invention;

[0025] Figure 5 This is a schematic diagram of the interior of another structure of the outer ring trapped vortex cavity in the present invention;

[0026] Figure 6 This is a schematic diagram of the three-dimensional structure of the first layer of the outer ring in the present invention;

[0027] Figure 7 This is a schematic diagram of the three-dimensional structure of the second layer of the outer ring in the present invention;

[0028] Figure 8 2 is a schematic diagram of the three-dimensional structure of a second embodiment of a burner for a stove according to the present invention;

[0029] Figure 9 1 is a schematic diagram of the internal structure of a second embodiment of a burner for a stove according to the present invention;

[0030] Figure 10 2 is a schematic structural diagram of an outer ring trapped vortex cavity in a second embodiment of a cooker burner according to the present invention;

[0031] Figure 11 2 is a schematic diagram of the three-dimensional structure of the inner ring fire cover of the third embodiment of the burner for a stove of the present invention;

[0032] Figure 12 2. It is a schematic diagram of the three-dimensional structure of the first layer of the inner ring of the third embodiment of the burner for a cooker of the present invention;

[0033] Figure 13 2. It is a schematic diagram of the internal structure of the inner ring fire cover in the third embodiment of the burner for a stove of the present invention;

[0034] Figure 14 1 is a schematic structural diagram of the inner ring trapped vortex cavity in the third embodiment of the stove burner of the present invention.

[0035] In the figure: 1. burner body; 2. inner ring mixing cavity; 3. outer ring mixing cavity; 4. inner ring fire hole; 5. outer ring fire hole; 6. inner ring trapped vortex cavity; 7. outer ring trapped vortex cavity; 8. gas distributor; 9. inner ring fire cover; 10. outer ring fire cover; 801. first ring wall; 802. second ring wall; 803. third ring wall; 804. fourth ring wall; 901. inner ring first layer; 902. inner ring second layer; 903. second protrusion; 904. first surrounding part; 905. second surrounding part; 906. first spacing; 907. second spacing; 1001. outer ring first layer; 1002. outer ring second layer; 1003. outer ring first annular groove; 1004. outer ring second annular groove; 1005. first inlet; 1006. through hole; 1007. second inlet; 1008. first protrusion. DETAILED DESCRIPTION

[0036] The technical solution of the present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings. It should be understood that the implementation of the present invention is not limited to the following embodiments, and any form of modification and / or change made to the present invention will fall within the scope of protection of the present invention.

[0037] In the present invention, unless otherwise specified, all parts and percentages are by weight. The equipment and raw materials used are commercially available or commonly used in the art. The methods in the following embodiments, unless otherwise specified, are conventional methods in the art. The components or equipment in the following embodiments, unless otherwise specified, are all universal standard parts or components known to those skilled in the art. Their structures and principles are known to those skilled in the art through technical manuals or routine experimental methods.

[0038] The flame stability of a stove burner is one of its important indicators. To improve the flame stability of a stove burner, the existing technology usually adopts the method of setting a flame stabilization groove or a small hole flame stabilization to stabilize the flame, making the burner flame short and flat, affecting the heating effect on the bottom of the pot and reducing thermal efficiency.

[0039] To address this issue, an embodiment of the present invention discloses a burner for a stove, comprising a burner body 1, wherein the burner body 1 is provided with a gas mixing cavity, a fire hole, and a trapped vortex cavity. One end of the fire hole is connected to the outside of the burner body 1, and the trapped vortex cavity is connected to the other end of the fire hole and the gas mixing cavity. The chamber volume of the trapped vortex cavity is smaller than the chamber volume of the gas mixing cavity, and the chamber volume of the trapped vortex cavity is larger than the chamber volume of the fire hole. By providing the trapped vortex cavity, when the gas-air mixture introduced into the gas mixing cavity flows through the fire hole, a vortex is formed at the location of the trapped vortex cavity, slowing the speed of the gas-air mixture flowing through the fire hole, thereby improving the stability of the flame formed by the gas-air mixture burning at the portion connected to the fire hole and the outside of the burner body 1.

[0040] This technical solution can be implemented in various burners with single or multi-ring fire structures. The following uses a double-ring fire burner with inner and outer fire rings as an example, and describes an embodiment of the present invention in detail with reference to the accompanying drawings. For ease of explanation, numerous specific details are set forth in the following detailed description to provide a comprehensive understanding of the embodiments of the present invention.

[0041] like Figure 1 and Figure 2As shown, the present invention discloses a first embodiment of a burner for a stove, which includes a burner body 1, which is provided with two gas mixing cavities, two groups of fire holes and a group of trapped vortex cavities. The two gas mixing cavities are an inner ring gas mixing cavity 2 and an outer ring gas mixing cavity 3, and the outer ring gas mixing cavity 3 surrounds the outside of the inner ring gas mixing cavity 2. The two groups of fire holes are an outer ring fire hole 5 and an inner ring fire hole 4, respectively. The outer ring fire hole 5 connects the outer ring gas mixing cavity 3 and the outside of the burner body 1, and the inner ring fire hole 4 connects the inner ring gas mixing cavity 2 and the outside of the burner body 1. The outer ring fire hole 5 is provided with a group of trapped vortex cavities, named outer ring trapped vortex cavity 7. Of course, in a burner with a single-ring fire structure, the number of gas mixing cavities and fire holes is reduced accordingly, and in a burner with a three-ring fire structure or more ring fire structures, the number of gas mixing cavities and fire holes is increased accordingly.

[0042] Specifically, the burner body 1 is provided with a gas distribution plate 8 and two fire covers, namely an outer ring fire cover 10 and an inner ring fire cover 9. The gas distribution plate 8 is provided with four annular walls protruding from the surface of the gas distribution plate 8. The four annular walls surround the gas distribution plate 8 in sequence from the center to the outer periphery of the gas distribution plate 8, and from the inside to the outside are the first annular wall 801, the second annular wall 802, the third annular wall 803, and the fourth annular wall 804. The bottom of the outer ring fire cover 10 is connected to the top of the third annular wall 803 and the fourth annular wall 804 on the surface of the gas distribution plate 8. The space enclosed by the outer ring fire cover 10 and the third annular wall 803 and the fourth annular wall 804 on the surface of the gas distribution plate 8 is configured as the outer annular gas mixing cavity 3. The bottom of the inner ring fire cover 9 is connected to the top of the first annular wall 801 and the second annular wall 802. The space enclosed by the inner ring fire cover 9 and the first annular wall 801 and the second annular wall 802 on the surface of the gas distribution plate 8 is configured as the inner annular gas mixing cavity 2. It should be noted that in a burner with a single-ring fire structure, the gas distribution plate 8 only needs to be provided with at least two ring walls. In this case, the gas distribution plate 8 and the fire cover together form a gas mixing cavity with a single-ring structure.

[0043] The inner ring fire holes 4 are circumferentially arranged on the inner ring fire cover 9, and the outer ring fire holes 5 are circumferentially arranged on the outer ring fire cover 10. Specifically, the cross-sectional shape of the outer ring fire hole 5 in both the axial and radial directions is square, that is, a single outer ring fire hole 5 is in the shape of an elongated slot, and multiple outer ring fire holes 5 are evenly spaced around the circumference of the outer ring fire cover 10, centered around the central axis of the outer ring fire cover 10. Of course, a single outer ring fire hole 5 can also be circular. The outer ring trapped vortex cavity 7 is formed in the outer ring fire cover 10, extending circumferentially along the burner body 1, and is connected to each outer ring fire hole 5 at a position adjacent to the center of the outer ring fire hole 5. In the longitudinal cross-section of the stove burner, the minimum dimension of the outer ring trapped vortex cavity 7 in the height direction is greater than the minimum dimension of the outer ring fire hole 5 in the height direction, thereby making the chamber volume of the outer ring trapped vortex cavity 7 larger than the chamber volume of the outer ring fire hole 5. To facilitate the opening of the outer ring fire hole 5 and the outer ring trapped vortex cavity 7, the outer ring fire cover 10 has a split structure.

[0044] Specifically, the outer ring fire cover 10 includes a first layer and a second layer, which are designated as the outer ring first layer 1001 and the outer ring second layer 1002 for ease of distinction. The bottom of the outer ring first layer 1001 abuts against the fourth annular wall 804 of the gas distribution plate 8, while the bottom of the outer ring second layer 1002 abuts against the third annular wall 803 of the gas distribution plate 8. Alternatively, the portion of the outer ring first layer 1001 adjacent to the bottom abuts against the fourth annular wall 804 of the gas distribution plate 8, while the portion of the outer ring second layer 1002 adjacent to the bottom abuts against the third annular wall 803 of the gas distribution plate 8.

[0045] Both the outer ring first layer 1001 and the outer ring second layer 1002 are provided with an annular groove extending along the circumference of the burner body 1. The notches of the two annular grooves are arranged opposite each other, and the top wall of each annular groove is connected to the hole wall of the outer ring fire hole 5. The cavity corresponding to the annular groove is configured as the outer ring trapped vortex cavity 7. Of course, it is also possible that only the outer ring first layer 1001 or only the outer ring second layer 1002 is provided with an annular groove.

[0046] The two annular grooves may adopt the same or similar structures, or may adopt different structures, which will be described below respectively.

[0047] like Figure 3 As shown, the annular groove provided in the outer ring first layer 1001 is defined as the outer ring first annular groove 1003, and the annular groove provided in the outer ring second layer 1002 is defined as the outer ring second annular groove 1004. A portion of the outer ring first annular groove 1003 and a portion of the outer ring second annular groove 1004 are arranged on the left and right sides and are opposite each other. The outer ring first annular groove 1003 and the outer ring second annular groove 1004 are both annular grooves with bottom walls. The annular groove with a bottom wall here means that in the longitudinal cross-section of the burner for the stove, the annular groove has two opposing side groove walls, that is, the entire annular groove is recessed into the surface of the fire hole wall. The outer ring trapped vortex cavity 7 includes a first inlet 1005, and there is a distance between the free end of the bottom wall corresponding to the outer ring first annular groove 1003 and the free end of the bottom wall corresponding to the outer ring second annular groove 1004. The space formed by the distance between the free end of the bottom wall corresponding to the outer ring first annular groove 1003 and the free end of the bottom wall corresponding to the outer ring second annular groove 1004 is configured as the first inlet 1005 of the outer ring trapped vortex cavity 7.

[0048] like Figure 4As shown, the annular groove provided in the outer ring first layer 1001 is defined as the outer ring first annular groove 1003, and the annular groove provided in the outer ring second layer 1002 is defined as the outer ring second annular groove 1004. A portion of the outer ring first annular groove 1003 and a portion of the outer ring second annular groove 1004 are distributed on the left and right and are arranged opposite each other. The outer ring first annular groove 1003 is an annular groove with a bottom wall, and the outer ring second annular groove 1004 is an annular groove without a bottom wall. The annular groove without a bottom wall is defined here relative to the annular groove with a bottom wall. Specifically, in the longitudinal cross-section of the burner for the stove, the annular groove has only one side groove wall, and the portion of the annular groove opposite the side groove wall is an open structure, that is, one side of the annular groove is roughly flush with a portion of the surface of the fire hole wall. The outer ring trapped vortex cavity 7 includes a first inlet 1005, and there is a distance between the free end of the bottom wall corresponding to the outer ring first annular groove 1003 and the side wall of the outer ring second annular groove 1004. The space formed by the distance between the free end of the bottom wall corresponding to the outer ring first annular groove 1003 and the side wall of the outer ring second annular groove 1004 is configured as the first inlet 1005 of the outer ring trapped vortex cavity 7. The first inlet 1005 of the outer ring trapped vortex cavity 7 and the top wall of the outer ring second annular groove 1004 are at least partially arranged opposite to each other.

[0049] like Figure 5 As shown, the structure of the outer ring first annular groove 1003 and the outer ring second annular groove 1004 can be Figure 4 The structure shown is interchanged, that is, the first annular groove 1003 of the outer ring is an annular groove without a bottom wall, and the second annular groove 1004 of the outer ring is an annular groove with a bottom wall.

[0050] like Figure 6 As shown, and reference Figure 3 The outer ring fire cover 10 is further provided with a through hole 1006. The first opening of the through hole 1006 is formed in the bottom wall corresponding to the annular groove with a bottom wall. The first opening of the through hole 1006 is configured as the second inlet 1007 of the outer ring trapped vortex cavity 7. The aperture of the second inlet 1007 is smaller than that of the first inlet 1005. When the gas-air mixture in the outer ring mixing cavity 3 enters the outer ring trapped vortex cavity 7, due to the aforementioned aperture difference, the gas flow rate flowing through the second inlet 1007 is higher than the gas flow rate flowing through the first inlet 1005. The two gases with different flow rates mix in the outer ring main cavity, further improving the mixing of the gas and air in the outer ring trapped vortex cavity 7.

[0051] like Figure 7As shown, the outer ring second layer 1002 is provided with a plurality of first protrusions 1008 at the location where it meets the outer ring first layer 1001. These first protrusions 1008 are evenly spaced along the circumference of the outer ring second layer 1002, forming a raised portion. The outer ring first layer 1001 and the outer ring second layer 1002 abut against each other via the raised portion. Adjacent first protrusions 1008 form a portion of the wall of a single outer ring fire hole 5. Of course, the raised portion can also be provided on the outer ring first layer 1001.

[0052] like Figures 8-10 As shown, the present invention also discloses a second embodiment of a burner for a stove. Different from the first embodiment, the outer ring fire hole 5 of the burner for a stove is annular and extends continuously along the circumference of the outer ring fire cover 10 with the central axis of the outer ring fire cover 10 as the center. The outer ring trapped vortex cavity 7 is formed in the outer ring fire cover 10 and also extends continuously along the circumference of the outer ring fire cover 10 with the central axis of the outer ring fire cover 10 as the center, and is connected to the annular outer ring fire hole 5. It should be noted that when the outer ring fire hole 5 is annular, the outer ring trapped vortex cavity 7 is not limited to Figure 9 and Figure 10 The structure shown can also be Figure 3-Figure 5 The structure of the outer ring trapped vortex cavity 7 is shown.

[0053] The present invention also discloses a third embodiment of a stove burner. Different from the first embodiment, the outer ring fire hole 5 of the stove burner is not provided with a vortex cavity, but the inner ring fire hole 4 is provided with a group of vortex cavities, which are named inner ring vortex cavities 6. Figure 11-14 As shown, the inner ring trapped vortex cavity 6 is formed in the inner ring fire cover 9, extends circumferentially along the burner body 1, and is connected to the inner ring fire hole 4. The inner ring fire cover 9 includes a first layer and a second layer, which are respectively designated as the inner ring first layer 901 and the inner ring second layer 902 for ease of distinction. The inner ring first layer 901 is disposed above the inner ring second layer 902, with the bottom of the inner ring first layer 901 abutting the top of the inner ring second layer 902. Specifically, a plurality of second protrusions 903 are provided at the portion where the bottom of the inner ring first layer 901 and the top of the inner ring second layer 902 are connected. The plurality of second protrusions 903 are evenly spaced along the circumference of the inner ring first layer 901 to form a raised portion. The bottom of each second protrusion 903 abuts the top of the inner ring second layer 902. The space between adjacent second protrusions 903 forms the inlet part of the inner ring trapped vortex cavity 6. The inlet part of the inner ring trapped vortex cavity 6 is evenly spaced along the circumference of the inner ring fire cover 9 with the central axis of the inner ring fire cover 9 as the center.

[0054] The inner ring first layer 901 is provided with a first surrounding portion 904 protruding from the bottom of the inner ring first layer 901. A second protrusion 903 is formed at the bottom of the first surrounding portion 904 and extends toward the inner ring second layer 902. The inner ring second layer 902 is provided with a second surrounding portion 905 protruding from the top of the inner ring second layer 902. The second surrounding portion 905 surrounds the outside of the first surrounding portion 904. A first spacing 906 is defined between the inner sidewall of the second surrounding portion 905 and the outer sidewall of the first surrounding portion 904. This first spacing 906 forms the main portion of the inner ring trapped vortex cavity 6, which extends continuously along the circumference of the inner ring fire cover 9. There is a second distance 907 between the top wall of the second surrounding portion 905 and the bottom wall of the inner ring first layer 901. The second distance 907 forms the inner ring fire hole 4. The part of the second distance 907 adjacent to the outer wall of the first surrounding portion 904 forms the connecting portion between the inner ring trapped vortex cavity 6 and the inner ring fire hole 4. The inner ring trapped vortex cavity 6 is connected to the inner ring fire hole 4 at a position adjacent to the top.

[0055] It should be noted that the inner ring trapped vortex cavity 6 is not limited to the above structure, and can also refer to Figure 3-Figure 7 The structure of the outer ring trapped vortex cavity 7 is shown. Similarly, the above structure of the inner ring trapped vortex cavity 6 can also be applied to the outer ring trapped vortex cavity 7.

[0056] The present invention also discloses a fourth embodiment of a burner for a stove. Different from the first embodiment, the outer ring fire hole 5 and the inner ring fire hole 4 of the burner for the stove are respectively provided with a group of trapped vortex cavities, which are respectively named as the outer ring trapped vortex cavity 7 and the inner ring trapped vortex cavity 6. Among them, the structure of the outer ring trapped vortex cavity 7 can refer to the first embodiment, and the structure of the inner ring trapped vortex cavity 6 can refer to the second embodiment, which will not be repeated here.

[0057] It should be noted that those skilled in the art can adaptively adjust the setting mode and structure of the trapped vortex cavity in the above-mentioned various embodiments according to actual application needs without any creative work, so that it is suitable for a burner with a single-ring fire structure, a burner with a three-ring fire structure or a burner with more ring fire structures.

[0058] The burner for a stove disclosed in the present invention does not have a flame stabilizing groove or a flame stabilizing hole, but instead adopts a trapped vortex cavity based on the trapped vortex flame stabilizing combustion technology. The trapped vortex cavity causes turbulence in the air flow of the gas-air mixture, so that a vortex is formed in the trapped vortex cavity, which not only slows down the flow speed of the gas-air mixture, but also makes the mixing of the gas and air more complete, thereby avoiding the influence of the short and flat flame caused by the flame stabilizing groove or the flame stabilizing hole, improving the flame stability and enhancing the thermal efficiency of the burner.

[0059] The present invention also discloses a gas cooker, which comprises any one of the above-mentioned burners for cookers.

[0060] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A burner for a stove, characterized in that: The burner for a stove comprises a burner body (1), the burner body (1) being provided with an air mixing cavity, a fire hole and a vortex cavity, one end of the fire hole being connected to the outside of the burner body (1), the vortex cavity being connected to the other end of the fire hole and the air mixing cavity, the cavity volume of the vortex cavity being smaller than the cavity volume of the air mixing cavity, the vortex cavity being capable of causing the air flow to form a vortex, the cavity volume of the vortex cavity being larger than the cavity volume of the fire hole; the burner body (1) being provided with an air distribution plate (8) and a fire cover, the fire cover comprising a first layer and a second layer, at least one of the first layer and the second layer being provided with an annular groove extending along the circumference of the burner body (1), the top wall of the annular groove being connected to the hole wall of the fire hole, the cavity corresponding to the annular groove being configured as the vortex cavity, the junction between the top wall of the annular groove and the hole wall of the fire hole being configured as the outer contour corresponding to the inlet of the fire hole; the inlet of the vortex cavity being directly connected to the air mixing cavity; The first layer and the second layer are both provided with the annular groove, the annular groove provided in the first layer is defined as a first annular groove, and the annular groove provided in the second layer is defined as a second annular groove, at least a portion of the first annular groove and at least a portion of the second annular groove are distributed left and right and are arranged opposite to each other, and both the first annular groove and the second annular groove are annular grooves with bottom walls; the trapped vortex cavity includes a first inlet (1005), a free end portion of the bottom wall corresponding to the first annular groove and a free end portion of the bottom wall corresponding to the second annular groove have a spacing, and a space formed by the spacing between the free end portion of the bottom wall corresponding to the first annular groove and the free end portion of the bottom wall corresponding to the second annular groove is configured as the first inlet (1005) of the trapped vortex cavity; Alternatively, at least a portion of the first annular groove and at least a portion of the second annular groove are distributed left and right and are arranged opposite to each other, one of the first annular groove and the second annular groove is an annular groove without a bottom wall, and the other annular groove is an annular groove with a bottom wall; the trapped vortex cavity includes a first inlet (1005), a free end portion of the bottom wall corresponding to the annular groove with a bottom wall and a side wall of the annular groove without a bottom wall have a spacing, and a space formed by the spacing between the free end portion of the bottom wall corresponding to the annular groove with a bottom wall and the side wall of the annular groove without a bottom wall is configured as the first inlet (1005) of the trapped vortex cavity; the first inlet (1005) of the trapped vortex cavity is arranged opposite to at least a portion of the top wall of the annular groove without a bottom wall; The fire cover comprises a through hole (1006), a first opening of the through hole (1006) being formed on a bottom wall corresponding to an annular groove having a bottom wall; the first opening of the through hole (1006) is configured as a second inlet (1007) of the trapped vortex cavity; The aperture of the second inlet is smaller than the aperture of the first inlet.

2. The burner for a stove according to claim 1, characterized in that: The trapped vortex cavity extends along the circumference of the burner body (1); and in the longitudinal cross-section of the stove burner, the minimum dimension of the trapped vortex cavity in the height direction is greater than the minimum dimension of the fire hole in the height direction.

3. A burner for a stove according to claim 1 or 2, characterized in that: The gas distribution plate (8) is provided with at least two annular walls protruding from the surface of the gas distribution plate (8); the fire cover is provided above the gas distribution plate (8); the bottom of the fire cover or the portion of the fire cover adjacent to the bottom abuts against the top of the annular walls; the space enclosed by the fire cover and the gas distribution plate (8) is configured as the gas mixing cavity; the fire hole is provided on the fire cover; and the trapped vortex cavity is formed on the fire cover.

4. The burner for a stove according to claim 3, characterized in that: The bottom of the first layer or the portion of the first layer adjacent to the bottom abuts against the outer annular wall of the gas distribution plate (8), and the bottom of the second layer or the portion of the second layer adjacent to the bottom abuts against the inner annular wall of the gas distribution plate (8).

5. The burner for a stove according to claim 4, characterized in that: The inlet of the trapped vortex cavity and the inlet of the fire hole are at least partially staggered.

6. The burner for a stove according to claim 3, characterized in that: At least one of the first layer and the second layer is provided with a convex portion; the first layer and the second layer are in contact with each other via the convex portion.

7. The burner for a stove according to claim 1, characterized in that: The fire hole is in the shape of a circular hole, a long slot or a ring; when the fire hole is in the shape of a circular hole or a long slot, the fire holes are evenly spaced along the circumference of the fire cover with the central axis of the fire cover as the center, and the trapped vortex cavity extends along the circumference of the fire cover.

8. The burner for a stove according to claim 1, characterized in that: The number of the fire holes is at least two groups, the number of the gas mixing cavities is at least two, at least one gas mixing cavity surrounds the outside of at least another gas mixing cavity, each group of fire holes communicates with one gas mixing cavity and the outside of the burner body (1), the number of the trapped vortex cavity is at least one, and at least one group of fire holes communicates with the trapped vortex cavity.

9. A gas cooker, characterized in that: The gas cooker comprises the cooker burner according to any one of claims 1 to 8.

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