Combustor and gas hob

Abstract

The application provides a burner with simple structure and convenient processing. The burner comprises a burner body provided with a gas mixing channel, a first flame channel and a vortex cavity. The burner body is further provided with a flame cover. The first flame channel is arranged on the flame cover, and the vortex cavity is formed in the flame cover. The flame cover comprises a first layer body and a second layer body arranged below the first layer body. The first layer body is provided with a first protruding part protruding from the bottom of the body part of the first layer body. The second layer body is provided with a second protruding part protruding from the top of the body part of the second layer body. The second protruding part surrounds the outside of the first protruding part. The inner side wall of the second protruding part and the outer side wall of the first protruding part have a first interval. The top wall of the second protruding part and the bottom wall of the body part of the first layer body have a second interval. The vortex cavity extending along the circumference of the burner body improves the stability of the flame.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of burners, in particular to a burner. BACKGROUND

[0002] The flame stability of a burner is one of its important indicators. In order to improve the flame stability of a burner, the prior art usually adopts a stable flame groove or a small hole stable flame way to stabilize the flame. This stable flame way is easy to cause the flame of the burner to be short and flat, which affects the heating effect on the pot bottom and reduces the thermal efficiency. SUMMARY

[0003] Based on the above background, the purpose of the present application is to provide a burner which is simple in structure and convenient to process, adopts a trapped vortex stable flame combustion technology, improves the flame stability, and improves the thermal efficiency of the burner.

[0004] In order to achieve the above-mentioned purpose of the application, the present application provides the following technical scheme:

[0005] A burner comprises a burner body provided with a gas mixing channel, a first flame channel and a trapped vortex chamber. One end of the first flame channel is communicated with the outside of the burner body, and the other end of the first flame channel is communicated with the gas mixing channel through the trapped vortex chamber. The trapped vortex chamber extends along the circumference of the burner body. The chamber volume of the trapped vortex chamber is smaller than the chamber volume of the gas mixing channel, and the chamber volume of the trapped vortex chamber is larger than the chamber volume of the first flame channel. The burner body is further provided with a flame cover. The first flame channel is arranged in the flame cover, and the trapped vortex chamber is formed in the flame cover. The flame cover comprises a first layer body and a second layer body arranged below the first layer body. The first layer body is provided with a first protruding portion protruding from the bottom of the body portion of the first layer body. The second layer body is provided with a second protruding portion protruding from the top of the body portion of the second layer body. The second protruding portion surrounds the outside of the first protruding portion. There is a first spacing between the inner side wall of the second protruding portion and the outer side wall of the first protruding portion. There is a second spacing between the top wall of the second protruding portion and the bottom wall of the body portion of the first layer body. The space formed by the first spacing is configured as at least part of the first flame channel, and the space formed by the second spacing is configured as at least part of the trapped vortex chamber.

[0006] By arranging the trapped vortex chamber extending along the circumference of the burner body, when the gas-air mixture flowing through the first flame channel from the gas mixing channel, a vortex is formed at the position of the trapped vortex chamber, which slows down the speed of the gas-air mixture flowing through the first flame channel, thereby improving the stability of the flame formed by the combustion of the gas-air mixture in the first flame channel and the communication part between the burner body and the outside.

[0007] As a preferred, in the longitudinal section of the burner, the minimum size of the trapped vortex chamber in the height direction is greater than the minimum size of the first flame channel in the height direction.

[0008] As preferred, the inlet of the vortex cavity is directly communicated with the gas mixing channel, and the inlet of the vortex cavity is formed in at least one of the first protruding part and the second layer.

[0009] As preferred, the inlet of the vortex cavity is at least partially staggered with the inlet of the first fire channel.

[0010] As preferred, at least one of the bottom wall of the first protruding part and the top wall of the second layer is provided with a plurality of third protruding parts; the first layer and the second layer are abutted through the third protruding parts; the third protruding parts are distributed along the circumference of the first layer; the vortex cavity comprises a first vortex cavity and a second vortex cavity, the space formed by the first interval is configured as the first vortex cavity, and the space formed by the third interval between two adjacent third protruding parts is configured as the second vortex cavity.

[0011] As preferred, the first fire channel is in the shape of a circular hole or a long slot, and the first fire channel is uniformly and spacedly distributed along the circumference of the fire cover with the central axis of the fire cover as the center.

[0012] As preferred, the first fire channel is in the shape of a ring, and the first fire channel continuously extends along the circumference of the fire cover with the central axis of the fire cover as the center.

[0013] As preferred, the number of the first fire channels is at least two groups, the number of the gas mixing channels is at least two, at least one gas mixing channel is surrounded by at least another gas mixing channel, each group of the first fire channels is communicated with one gas mixing channel and the outside of the burner body, and the number of the vortex cavities is at least one, and at least one group of the first fire channels is communicated with the vortex cavities.

[0014] As preferred, the burner body further comprises a second fire channel, the second fire channel is in the shape of a circular hole, a long slot or a ring, the second fire channel is located below the first fire channel, and the second fire channel is communicated with the outside of the burner body and one gas mixing channel.

[0015] As preferred, the burner body is further provided with a gas distribution disc, the gas distribution disc is provided with at least two ring walls protruding from the surface of the gas distribution disc, the fire cover is arranged above the gas distribution disc, the bottom of the fire cover or the part adjacent to the bottom of the fire cover is abutted with the top of the ring wall, and the space enclosed by the fire cover and the gas distribution disc is configured as the gas mixing channel.

[0016] A gas stove comprises the burner as any one of the above.

[0017] Compared with the prior art, the present application has the following advantages:

[0018] The combustor of the present application is provided with a vortex cavity extending along the circumference of the combustor body, so that when the mixed gas and air mixture flowing through the first fire channel from the mixed gas cavity passes the vortex cavity, vortex is formed at the position of the vortex cavity, the speed of the mixed gas and air mixture flowing through the first fire channel is slowed down, and the flame stability is improved. The combustor does not need small fire stabilizing flame, so that the short and flat flame is avoided, and the flame utilization rate and the thermal efficiency of the combustor are improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings.

[0020] Figure 1 is a schematic diagram of the three-dimensional structure of the combustor of the present application;

[0021] Figure 2 is a schematic diagram of the three-dimensional structure of the inner ring fire cover in the first embodiment of the combustor of the present application;

[0022] Figure 3 is a schematic diagram of the three-dimensional structure of the inner ring first layer in the first embodiment of the combustor of the present application;

[0023] Figure 4 is a schematic diagram of the internal structure of the inner ring fire cover in the first embodiment of the combustor of the present application;

[0024] Figure 5 is a schematic diagram of the structure of the inner ring vortex cavity in the first embodiment of the combustor of the present application;

[0025] Figure 6 is a schematic diagram of the internal structure of the second embodiment of the combustor of the present application.

[0026] In the figure: 1, combustor body; 2, inner ring mixed gas cavity; 3, outer ring mixed gas cavity; 4, inner ring first fire channel; 5, outer ring first fire channel; 6, inner ring vortex cavity; 7, outer ring vortex cavity; 8, gas distribution disc; 9, inner ring fire cover; 10, outer ring fire cover; 11, inner ring second fire channel; 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, third protruding part; 904, first protruding part; 905, second protruding part; 906, first spacing; 907, second spacing. DETAILED DESCRIPTION

[0027] The technical solutions of the present application will be further described in detail below with specific examples and in conjunction with the drawings. It should be understood that the implementation of the present application is not limited to the following examples, and any form of modification and / or change made to the present application will fall within the scope of protection of the present application.

[0028] In the present application, all the parts and percentages are by weight, the equipment and raw materials used are commercially available or commonly used in the art. In the following examples, the methods are conventional methods in the art unless otherwise specified. In the following examples, the components or equipment are general standard components or components known to those skilled in the art unless otherwise specified, and their structure and principle are known to those skilled in the art through technical manuals or conventional experimental methods.

[0029] The flame stability of the burner is one of the important indicators. In order to improve the flame stability of the burner, the prior art usually adopts the way of setting a stable flame groove or a small hole stable flame to stabilize the flame, so that the flame of the burner is short and flat, which affects the heating effect on the pot bottom and reduces the thermal efficiency. In view of the above problems, the present application discloses a burner, which comprises a burner body 1, the burner body 1 is provided with a gas mixing cavity, a first fire channel and a vortex cavity, one end of the first fire channel is communicated with the outside of the burner body 1, and the other end of the first fire channel communicated with the gas mixing cavity is communicated with the vortex cavity. The vortex cavity extends along the circumference of the burner body 1, the chamber volume of the vortex cavity is smaller than the chamber volume of the gas mixing cavity, and the chamber volume of the vortex cavity is larger than the chamber volume of the first fire channel. The burner body 1 is also provided with a fire cover, the first fire channel is arranged in the fire cover, and the vortex cavity is formed in the fire cover. The fire cover comprises a first layer body and a second layer body arranged below the first layer body, the first layer body is provided with a first protruding portion 904 protruding from the bottom of the body portion of the first layer body, the second layer body is provided with a second protruding portion 905 protruding from the top of the body portion of the second layer body, the second protruding portion 905 surrounds the outside of the first protruding portion 904, there is a first spacing 906 between the inner side wall of the second protruding portion 905 and the outer side wall of the first protruding portion 904, and there is a second spacing 907 between the top wall of the second protruding portion 905 and the bottom wall of the body portion of the first layer body. The space formed by the first spacing 906 is configured as at least part of the first fire channel, and the space formed by the second spacing 907 is configured as at least part of the vortex cavity.

[0030] In the following, the embodiments of the present application will be described in detail with the example of a double-ring flame structure burner with inner ring flame and outer ring flame, and in conjunction with the drawings. In the following detailed description, many specific details are set forth in order to provide a thorough understanding of the embodiments of the present application.

[0031] As Figures 1-5As shown, the first embodiment of the burner is disclosed, which comprises a burner body 1, the burner body 1 is provided with two mixed gas channels, two groups of first fire channels and two groups of trapped vortex cavities. The two mixed gas channels are respectively an inner ring mixed gas channel 2 and an outer ring mixed gas channel 3, and the outer ring mixed gas channel 3 surrounds the outer part of the inner ring mixed gas channel 2. The two groups of first fire channels are respectively an outer ring first fire channel 5 and an inner ring first fire channel 4, the outer ring first fire channel 5 is connected with the outer part of the outer ring mixed gas channel 3 and the burner body 1, the inner ring first fire channel 4 is connected with the outer part of the inner ring mixed gas channel 2 and the burner body 1, and the inner ring first fire channel 4 is provided with a group of trapped vortex cavities, which is named as an inner ring trapped vortex cavity 6. Of course, in the burner with a single ring fire structure, the number of mixed gas channels and first fire channels is reduced accordingly, and in the burner with a three-ring fire structure or more, the number of mixed gas channels and first fire channels is increased accordingly.

[0032] Specifically, the burner body 1 is provided with a gas distribution disc 8 and two fire covers, which are respectively an outer ring fire cover 10 and an inner ring fire cover 9. The gas distribution disc 8 is provided with four ring walls protruding from the surface of the gas distribution disc 8, and the four ring walls are sequentially surrounded from the central part of the gas distribution disc 8 to the outer peripheral part of the gas distribution disc 8, and from the inside to the outside, they are respectively a first ring wall 801, a second ring wall 802, a third ring wall 803 and a fourth ring wall 804. The bottom of the outer ring fire cover 10 is connected with the top of the third ring wall 803 and the fourth ring wall 804, and the space surrounded by the outer ring fire cover 10 and the third ring wall 803 and the fourth ring wall 804 of the surface of the gas distribution disc 8 is configured as the outer ring mixed gas channel 3. The bottom of the inner ring fire cover 9 is connected with the top of the first ring wall 801 and the second ring wall 802, and the space surrounded by the inner ring fire cover 9 and the first ring wall 801 and the second ring wall 802 of the surface of the gas distribution disc 8 is configured as the inner ring mixed gas channel 2. It should be noted that in the burner with a single ring fire structure, the number of ring walls provided by the gas distribution disc 8 is at least two, at this time, the gas distribution disc 8 and the fire cover form a single ring structure mixed gas channel.

[0033] The inner ring first flame path 4 is arranged on the inner ring flame cover 9 in the circumferential direction, the inner ring trapped vortex cavity 6 is formed on the inner ring flame cover 9, extends along the circumference of the burner body 1, and is communicated with the inner ring first flame path 4. In the longitudinal section of the burner, the minimum size of the inner ring trapped vortex cavity 6 in the height direction is greater than the minimum size of the inner ring first flame path 4 in the height direction, so that the cavity volume of the inner ring trapped vortex cavity 6 is greater than the cavity volume of the inner ring first flame path 4. The inner ring flame cover 9 includes a first layer body and a second layer body, which are named as the inner ring first layer body 901 and the inner ring second layer body 902 respectively for easy identification, and the inner ring first layer body 901 is arranged above part of the inner ring second layer body 902. The inner ring first layer body 901 is provided with a first protruding portion 904 protruding from the bottom of the body portion of the inner ring first layer body 901, and the inner ring second layer body 902 is provided with a second protruding portion 905 protruding from the top of the body portion of the inner ring second layer body 902, and the second protruding portion 905 surrounds the outside of the first protruding portion 904. The inner side wall of the second protruding portion 905 and the outer side wall of the first protruding portion 904 have a first spacing 906 therebetween, which forms a main part of the inner ring trapped vortex cavity 6, i.e. a first trapped vortex cavity, and this part of the inner ring trapped vortex cavity 6 continuously extends along the circumference of the inner ring flame cover 9. The top wall of the second protruding portion 905 and the bottom wall of the body portion of the inner ring first layer body 901 have a second spacing 907 therebetween, which forms the inner ring first flame path 4, and the second spacing 907 forms a communication part of the inner ring trapped vortex cavity 6 and the inner ring first flame path 4 adjacent to the part of the outer side wall of the first protruding portion 904, and the inner ring trapped vortex cavity 6 is communicated with the inner ring first flame path 4 at the position adjacent to the top thereof.

[0034] The inlet of the inner ring trapped vortex cavity 6 is directly communicated with the inner ring mixing cavity 2, the inlet of the inner ring trapped vortex cavity 6 is formed on the first protruding portion 904, and the inlet of the inner ring trapped vortex cavity 6 is arranged staggered with the inlet of the inner ring first flame path 4. Specifically, the part where the bottom wall of the first protruding portion 904 and the top wall of the inner ring second layer body 902 meet is provided with a plurality of third protruding portions 903, which are uniformly and spacedly distributed along the circumference of the inner ring first layer body 901, each of the third protruding portions 903 abuts against the top wall of the inner ring second layer body 902, and the space between adjacent third protruding portions 903 forms the inlet of the inner ring trapped vortex cavity 6, i.e. a second trapped vortex cavity, and the inlets of the inner ring trapped vortex cavities 6 are uniformly and spacedly distributed along the circumference of the inner ring flame cover 9 with the center axis of the inner ring flame cover 9 as the center. Of course, in other embodiments, the third protruding portions 903 can also be arranged on the top wall of the inner ring second layer body 902, and in this case, the inlet of the inner ring trapped vortex cavity 6 is formed on the inner ring second layer body 902. Alternatively, the bottom wall of the first protruding portion 904 and the top wall of the inner ring second layer body 902 can also be provided with third protruding portions 903 protruding from the surfaces thereof, and in this case, the inlet of the inner ring trapped vortex cavity 6, i.e. the second trapped vortex cavity, is formed on the first protruding portion 904 and the inner ring second layer body 902.

[0035] The first inner ring fire channel 4 in the embodiment is annular, and the first inner ring fire channel 4 extends continuously along the circumference of the inner ring fire cover 9 with the central axis of the inner ring fire cover 9 as the center, that is, the annular first inner ring fire channel 4 is formed by the second spacing 907 between the top wall of the second protruding part 905 and the bottom wall of the first inner ring layer 901. Of course, in other embodiments, the first inner ring fire channel 4 can also be a circular hole or a long slot, and at this time, the first inner ring fire channel 4 is uniformly and evenly distributed along the circumference of the inner ring fire cover 9 with the central axis of the inner ring fire cover 9 as the center, and the circular hole or long slot-shaped first inner ring fire channel 4 can be formed by setting protruding parts uniformly and evenly distributed along the circumference on the top wall of the second protruding part 905 or the bottom wall of the first inner ring layer 901.

[0036] The burner body 1 in the embodiment further comprises a second inner ring fire channel 11 located below the first inner ring fire channel 4, the second inner ring fire channel 11 is arranged on the inner ring fire cover 9 in the circumferential direction and is uniformly and evenly distributed with the central axis of the burner body 1 as the center, the second inner ring fire channel 11 communicates the outside of the burner body 1 and the inner ring gas mixing channel 2, and the second inner ring fire channel 11 is in the form of a circular hole. Of course, in other embodiments, the second inner ring fire channel 11 can also be in the form of a long slot, or the second inner ring fire channel 11 can also be annular, and the annular first inner ring fire channel 4 extends continuously along the circumference of the inner ring fire cover 9 with the central axis of the inner ring fire cover 9 as the center.

[0037] As shown in Figure 6 The second embodiment of the burner is also disclosed, which is different from the first embodiment, and the first outer ring fire channel 5 and the first inner ring fire channel 4 of the burner are respectively provided with a group of vortex cavities, which are respectively named as the outer ring vortex cavity 7 and the inner ring vortex cavity 6, wherein the structure of the outer ring vortex cavity 7 can refer to the first embodiment, or can be adaptively adjusted on the basis of the specific structure of the outer ring fire cover 10.

[0038] It should be noted that those skilled in the art can adaptively adjust the setting mode and structure of the vortex cavity in the above various embodiments without creative labor, so as to adapt to the burner with a single ring fire structure, the burner with a three-ring fire structure or more ring fire structures.

[0039] The burner disclosed in the present application does not set a flame stabilizing groove or a flame stabilizing small hole, but uses a vortex cavity based on the vortex flame stabilizing combustion technology, the vortex cavity causes the airflow turbulence of the gas-air mixture, so that the vortex is formed at the vortex cavity part, not only the flow velocity of the gas-air mixture is slowed down, but also the mixing of the gas-air is more sufficient, thus avoiding the influence of the short and flat flame caused by the flame stabilizing groove or the flame stabilizing small hole, improving the flame stability and the thermal efficiency of the burner.

[0040] The present application further discloses a gas stove, which comprises the above-mentioned burner.

[0041] The principles and implementations of the present application are described in the specific examples herein, and the above examples are only used to help understand the method of the present application and its core idea. It should be pointed out that, for ordinary skilled in the art, without departing from the principles of the present application, the present application can be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A burner, characterized in that: The burner includes a burner body (1), which has a mixing chamber, a first flame channel, and a vortex chamber. One end of the first flame channel is connected to the outside of the burner body (1), and the vortex chamber is connected to the other end of the first flame channel and the mixing chamber. The vortex chamber extends circumferentially along the burner body (1), and the chamber volume of the vortex chamber is smaller than the chamber volume of the mixing chamber and larger than the chamber volume of the first flame channel. The burner body (1) also has a flame cap, the first flame channel is located on the flame cap, and the vortex chamber is formed on the flame cap. The flame cap includes a first layer and a second layer partially located below the first layer. The first layer has a phase... A first protrusion (904) is provided protruding from the bottom of the main body of the first layer, and a second protrusion (905) is provided protruding from the top of the main body of the second layer. The second protrusion (905) surrounds the outside of the first protrusion (904). There is a first gap (906) between the inner wall of the second protrusion (905) and the outer wall of the first protrusion (904), and a second gap (907) between the top wall of the second protrusion (905) and the bottom wall of the main body of the first layer. The space formed by the first gap (906) is configured as at least a partial vortex cavity, and the space formed by the second gap (907) is configured as at least a partial first fire channel.

2. A burner according to claim 1, characterized in that: In the longitudinal section of the burner, the minimum dimension of the vortex cavity in the height direction is greater than the minimum dimension of the first fire channel in the height direction.

3. A burner according to claim 1, characterized in that: The inlet of the vortex cavity is directly connected to the mixing chamber, and the inlet of the vortex cavity is formed in at least one of the first protrusion (904) and the second layer.

4. A burner according to claim 1, characterized in that: The inlet of the vortex cavity is at least partially offset from the inlet of the first fire channel.

5. A burner according to claim 1, characterized in that: At least one of the bottom wall of the first protrusion (904) and the top wall of the second layer is provided with a plurality of third protrusions (903); the first layer and the second layer abut against each other through the third protrusions (903); the third protrusions (903) are distributed along the circumference of the first layer; the vortex cavity includes a first vortex cavity and a second vortex cavity, the space formed by the first spacing (906) is configured as the first vortex cavity, there is a third spacing between two adjacent third protrusions (903), and the space formed by the third spacing is configured as the second vortex cavity.

6. A burner according to any one of claims 1 to 5, characterized in that: The first fire channel is in the shape of a round hole or a long groove, and the first fire channel is evenly distributed around the central axis of the fire cap.

7. A burner according to any one of claims 1 to 5, characterized in that: The first fire channel is circular and extends continuously around the central axis of the fire cap.

8. A burner according to any one of claims 1 to 5, characterized in that: The number of the first fire channels is at least two sets, the number of the mixing chambers is at least two, at least one mixing chamber surrounds the outside of at least another mixing chamber, each set of the first fire channels connects to a mixing chamber and the outside of the burner body (1), the number of the vortex chamber is at least one, and at least one set of the first fire channels connects to the vortex chamber.

9. A burner according to claim 6, 7, or 8, characterized in that: The burner body (1) further includes a second fire channel, which is in the shape of a round hole, a long groove, or an annular shape. The second fire channel is located below the first fire channel and connects the outside of the burner body (1) and a mixing chamber.

10. A burner according to claim 1, characterized in that: The burner body (1) is also provided with a gas distribution plate (8), the gas distribution plate (8) is provided with at least two annular walls protruding from the surface of the gas distribution plate (8), the burner cap is provided above the gas distribution plate (8), the bottom of the burner cap or the part of the burner cap near the bottom abuts against the top of the annular wall, and the space enclosed by the burner cap and the gas distribution plate (8) is configured as the gas mixing chamber.

11. A gas stove, characterized in that: The gas stove includes a burner as described in any one of claims 1-10.

Images