CN217423314U - Burner and gas appliance - Google Patents

Abstract

The application relates to the technical field of burners, and the embodiment of the application provides a combustor and a burner. Among the above-mentioned combustor, this combustor includes casing and regulating part at least, is formed with in the casing and holds the chamber, through holding the intracavity and set up the regulating part, can separate the chamber that holds for the reposition of redundant personnel chamber and the regulation chamber that are independent each other. So, to the different pressures that different air currents produced, the regulating part can correspond the action, realize the dynamic change between reposition of redundant personnel chamber and the regulation chamber, make the fire hole area grow or diminish with reposition of redundant personnel chamber intercommunication, and then can increase the heat load turndown ratio of combustor through adjusting the fire hole area, thereby increased the heat load control range of combustor, the use of combustor has been expanded, make the combustor can adapt to more in service behavior, thereby the user demand of combustor has been satisfied.

Description

Burner and gas appliance

Technical Field

The application relates to the technical field of burners, in particular to a burner and a burner.

Background

In the related art, when the load ratio of the combustor reaches a certain range, the load ratio cannot be further increased. It follows that the burner heat load adjustment range in the related art is small, resulting in limited use of the burner.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a burner and a combustion appliance, so as to increase the load ratio of the burner, increase the adjustable range of the thermal load of the burner, and expand the use of the burner to meet the use requirement of the burner.

According to an aspect of the present application, an embodiment of the present application provides a burner, including:

the fire-extinguishing device comprises a shell, a fire-extinguishing chamber and a fire-extinguishing chamber, wherein the shell is provided with a bottom wall and a side wall surrounding the bottom wall, a plurality of fire holes are formed in the side wall, and an accommodating cavity with a first opening at one end is formed by the bottom wall and the side wall in an enclosing manner; and

the adjusting piece is arranged in the accommodating cavity; the adjusting piece comprises an elastic piece and a partition piece, one end of the elastic piece is connected with the bottom wall, the other end of the elastic piece is connected with the partition piece, and the accommodating cavity is divided into a flow dividing cavity and an adjusting cavity by the partition piece, wherein the flow dividing cavity and the adjusting cavity are independent of each other;

the flow dividing cavity is communicated with the first opening, so that airflow can flow into the flow dividing cavity through the first opening and flow out through the fire holes communicated with the flow dividing cavity;

the partition member is movable toward or away from the bottom wall in response to the pressure of the airflow entering the flow dividing chamber and the elastic force provided by the elastic member to adjust to define the flow dividing chamber.

Among the above-mentioned combustor, this combustor includes casing and regulating part at least, is formed with in the casing and holds the chamber, through holding the intracavity and set up the regulating part, can separate the chamber that holds for the reposition of redundant personnel chamber and the regulation chamber that are independent each other. So, to the different pressures that different air currents produced, the regulating part can correspond the action, realize the reposition of redundant personnel chamber and adjust the dynamic change between the chamber, make the fire hole area grow or diminish with reposition of redundant personnel chamber intercommunication, and then can increase the heat load turndown ratio of combustor through adjusting fire hole area, thereby the heat load control range of combustor has been increased, the use of combustor has been expanded, make the combustor can adapt to more in service behavior, thereby the user demand of combustor has been satisfied.

In one embodiment, the burner further comprises a seal disposed at an outer edge of the partition;

the seal is located between the divider and the sidewall. By providing the sealing member, the sealing property between the partitioning member and the side wall is improved. In this way, the airflow in the diversion chamber can be further blocked from entering the regulation chamber.

In one embodiment, the divider has an abutment surface that abuts the sidewall;

at least part of the abutting surface is covered with the sealing element. By providing the contact surface and providing the surface with the sealing member in this manner, the sealing property between the separator and the sidewall can be further improved.

In one embodiment, the divider includes a first flange abutting the sidewall;

the first flanging faces the side wall, and the surface of the first flanging, which is in contact with the side wall, forms the abutting surface. In this way, by providing the first flange, a larger abutting surface can be formed, and the sealing property between the separator and the sidewall can be further improved.

In one embodiment, the first flange is bent and extended towards or away from the first opening. Thus, the first flange can be formed and obtained.

In one embodiment, the bottom wall is provided with a groove recessed away from the first opening;

one end of the elastic piece is at least partially arranged in the groove. Therefore, the elastic piece is convenient to fix and install.

In one embodiment, the housing comprises a body and an end cap fixedly connected with the body;

the body is internally provided with the accommodating cavity, the first opening and a second opening which is opposite to the first opening and communicated with the accommodating cavity, and the end cover is arranged at the second opening;

wherein the inner wall of the body forms the side wall, and a side surface of the end cap facing the first opening forms the bottom wall. So, through setting up and body fixed connection's end cover, not only can obtain required structure, can also be convenient for install the regulating part.

In one embodiment, the end cap includes a second flange abutting the side wall. Thus, the sealing performance between the end cover and the side wall can be further improved.

In one embodiment, the second flange is bent and extended towards or away from the first opening. Thus, the second flange can be formed and obtained.

According to another aspect of the present application, there is also provided a burner comprising a burner as described above. So, to the different pressures that different air currents produced, the regulating part can correspond the action, realize the dynamic change between reposition of redundant personnel chamber and the regulation chamber, make the fire hole area grow or diminish with reposition of redundant personnel chamber intercommunication, and then can increase the heat load turndown ratio of combustor through adjusting the fire hole area, thereby increased the heat load control range of combustor, the use of combustor has been expanded, make the combustor can adapt to more in service behavior, thereby the user demand of combustor has been satisfied.

Additional aspects and advantages of embodiments of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of embodiments of the present application.

Drawings

FIG. 1 is a schematic view of a combustor in a first state in one embodiment of an embodiment of the present application;

FIG. 2 is a schematic view of a combustor in a second state in one implementation of an embodiment of the present application;

FIG. 3 is an enlarged partial view of FIG. 1 at G according to an embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of the cooperation between the end cap, the adjusting member and the body in the embodiment of the present application.

Notation of elements for simplicity:

the fire hole comprises a shell 100, a bottom wall 101, a groove 1011, a side wall 102, a fire hole 103, a body 110, an end cover 120 and a second flanging 121;

an adjusting member 200, an elastic member 210, a spacer 220, a first flange 221;

a sealing member 300;

a first opening a1, a second opening a 2;

accommodating cavity c, flow dividing cavity c1 and adjusting cavity c 2.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, specific embodiments of the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth to provide a thorough understanding of embodiments of the present application. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. The embodiments of the present application can be implemented in many different ways than those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention, and therefore, the embodiments of the present application are not limited to the specific embodiments disclosed below.

It is to be understood that the terms "first," "second," and the like as used herein may be used herein to describe various terms of art, and are not to be construed as indicating or implying relative importance or implicit to a number of technical features indicated. These terms are not intended to be limiting unless specifically stated otherwise. These terms are only used to distinguish one term from another. For example, the first and second flanges may be different flanges without departing from the scope of the present application. In the description of the embodiments of the present application, "a plurality" or "a plurality" means at least two, e.g., two, three, etc., unless specifically defined otherwise.

In the description of the embodiments of the present application, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.

In the description of the embodiments of the present application, unless otherwise explicitly specified or limited, a first feature "on" or "under" a second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "above," and "over" a second feature may mean that the first feature is directly above or obliquely above the second feature, or that only the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely below the second feature, or may simply mean that the first feature is at a lesser level than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application in the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

The full premix combustion is combustion in which all air required for combustion is mixed with fuel gas. In the related art, when the load ratio (i.e., the heat load adjustment ratio) of the combustor reaches a certain range, it cannot be further increased. It can be seen that the burner heat load adjustment range in the related art is small, resulting in limited use of the burner.

The inventor of the present application has noticed that, due to the characteristics of the gas, when the thermal strength of the fire hole reaches a certain strength, the load ratio of the fully premixed burner cannot be further increased during operation. And fire hole heat intensity is relevant with the fire hole area, and on the certain basis of gas and air's mixed air flow volume and pressure, the fire hole area is big more, and fire hole heat intensity also can be bigger, and then can increase the heat load control range of combustor. The inventor of the present application has found that burners with excess load ratios can be accommodated using different sizes of burner port areas. However, in the process, the adjustment range of the thermal load is small, the applicability is poor, and the thermal load cannot be adjusted well.

Based on this, the inventors of the present application have conducted extensive studies to realize adjustment of the thermal load of the burner by adjusting the fire hole area.

The combustor provided by the embodiment of the application is described in connection with the related description of some embodiments.

FIG. 1 illustrates a schematic structural view of a combustor in a first state in one implementation of an embodiment of the present application; FIG. 2 illustrates a schematic structural view of a combustor in a second state in one implementation of an embodiment of the present application; for ease of illustration, only portions relevant to the embodiments of the present application are shown. It should be noted that the fluid pressure in the second state is higher than the fluid pressure in the first state, and fig. 1 and 2 respectively show the internal structure of the combustor in these two states.

In some embodiments, referring to fig. 1 and 2, embodiments of the present application provide a burner including a housing 100 and an adjustment member 200. The housing 100 has a bottom wall 101 and a side wall 102 surrounding the bottom wall 101, the side wall 102 is provided with a plurality of fire holes 103, and the bottom wall 101 and the side wall 102 enclose a receiving cavity c having a first opening a1 at one end. The adjusting member 200 is disposed in the receiving chamber c. The adjusting member 200 includes an elastic member 210 and a partition member 220. One end of the elastic member 210 is connected to the bottom wall 101, the other end of the elastic member 210 is connected to the partition member 220, and the accommodation chamber c is partitioned by the partition member 220 into a branch chamber c1 and an adjustment chamber c2, which are independent of each other. Wherein the branch chamber c1 is in communication with the first opening a1, so that the air flow can flow into the branch chamber c1 through the first opening a1 and flow out through the fire hole 103 in communication with the branch chamber c 1. The partition 220 is movable toward or away from the bottom wall 101 in response to the pressure of the air flow entering the branch chamber c1 and the elastic force provided by the elastic member 210 to adjust to define the branch chamber c 1.

It should be noted that, the diversion chamber c1 and the adjustment chamber c2 are independent from each other, which means that the two chambers are separated from each other and are two different chambers. The branch chamber c1 is defined by a side surface of the partition 220 facing the first opening a1 and the side wall 102, and the regulation chamber c2 is defined by a side surface of the partition 220 facing the bottom wall 101 and the side wall 102. In some embodiments, the first opening a1 may be directly connected to an output end of a blower (not shown in fig. 1 and 2) for outputting a mixed gas flow of gas and air into the distribution chamber c1 through the first opening a 1. It can be understood that the input amount and the pressure of the mixed air flow can be controlled according to the rotating speed of the fan. As shown in fig. 1, when the fan speed is low, the pressure of the mixed air flow entering the branch chamber c1 is low, and the volume of the branch chamber c1 is small under the elastic force of the elastic member 210. At this time, the area of the fire hole 103 communicating with the branch chamber c1 is also small. As shown in fig. 2, when the fan speed is high, the pressure of the mixed air flow entering the branch chamber c1 is high, the elastic member 210 is compressed, and the volume of the branch chamber c1 is large. At this time, the area of the fire hole 103 communicating with the branch chamber c1 is also large. Of course, in other embodiments, other devices may be used to inject the mixed gas flow of the fuel gas and the air, which is not specifically limited in this application.

From this, to the different pressures that different air currents produced, regulating part 200 can correspond the action, realize the dynamic change between reposition of redundant personnel chamber c1 and the regulation chamber c2, make the fire hole 103 area grow or diminish with reposition of redundant personnel chamber c1 intercommunication, and then can increase the heat load turndown ratio of combustor through adjusting fire hole 103 area, thereby the heat load adjustment range of combustor has been increased, the use of combustor has been expanded, make the combustor can adapt to more in service behavior, thereby the user demand of combustor has been satisfied.

FIG. 3 is a schematic diagram illustrating a partial enlarged structure at G in FIG. 1 according to an embodiment of the present application; for convenience of explanation, only portions related to the embodiments of the present application are shown.

In some embodiments, referring to fig. 3 in combination with fig. 1 and 2, the burner further includes a seal 300 disposed at an outer edge of the partition 220. The seal 300 is located between the divider 220 and the sidewall 102. By providing the sealing member 300, the sealability between the partition 220 and the sidewall 102 is improved. Alternatively, the seal 300 may be a sealing cotton. In this manner, the gas flow in the branch chamber c1 can be further blocked from entering the regulating chamber c 2.

To further enhance the sealing effect, please continue to refer to fig. 3, in some embodiments, the partition 220 has an abutting surface abutting the sidewall 102. At least a part of the abutment surface is covered with a sealing member 300. That is, the contact surface may be provided with the sealing material 300 entirely or partially, as long as sealing can be further achieved, and this is not particularly limited in the embodiment of the present application. By providing the abutting surface and providing the sealing member 300 on the surface in this manner, the sealing property between the separator 220 and the sidewall 102 can be further improved.

In particular, with continued reference to fig. 3, the divider 220 includes a first flange 221 that abuts the sidewall 102. The surface of the first flange 221 facing the sidewall 102 and in contact with the sidewall 102 forms the abutment surface. By providing the first flange 221 in this manner, a larger contact surface can be formed, and the sealing property between the separator 220 and the sidewall 102 can be further improved. Also, the burring structure does not excessively increase the weight of the partition 220. Of course, the abutting surface may be increased by increasing the thickness of the spacer 220, which may be selected according to the actual use situation, and this is not particularly limited in the embodiment of the present application. Optionally, the first flange 221 is bent to extend toward or away from the first opening a 1. In this manner, the first flange 221 can be formed. For example, fig. 3 illustrates the first flange 221 extending away from the first opening a 1.

With continued reference to fig. 1 and 2, to facilitate the fixing and mounting of the elastic element 210, in some embodiments, the bottom wall 101 is provided with a groove 1011 recessed away from the first opening a 1. One end of the elastic member 210 is at least partially disposed within the recess 1011. Alternatively, the elastic member 210 may be provided as a member having elasticity such as a spring. On the basis of facilitating the fixing and installation of the elastic member 210, the groove 1011 can also increase the structural strength of the bottom wall 101, which is beneficial to obtain a more stable structure.

FIG. 4 is a schematic diagram illustrating the structure of the cooperation between the end cap 120, the adjusting member 200 and the body 110 in the embodiment of the present application; for convenience of explanation, only portions related to the embodiments of the present application are shown.

In some embodiments, referring to fig. 4 in combination with fig. 1 and 2, the housing 100 includes a body 110 and an end cap 120 fixedly connected to the body 110. The body 110 is provided with a containing cavity c, a first opening a1 and a second opening a2 opposite to the first opening a1 and communicated with the containing cavity c, and the end cover 120 is covered at the second opening a 2. Wherein the inner wall of the body 110 forms the side wall 102, and a side surface of the end cap 120 facing the first opening a1 forms the bottom wall 101. Thus, the end cap 120 fixedly connected to the body 110 can not only obtain a desired structure, but also facilitate installation of the adjusting member 200.

In particular, with continued reference to fig. 4, the end cap 120 includes a second flange 121 that abuts the sidewall 102. In this way, the sealing between the end cap 120 and the sidewall 102 can be further improved. Optionally, the second flange 121 is bent to extend toward or away from the first opening a 1. In this manner, the second burring 121 can be formed. For example, fig. 4 illustrates the second flange 121 extending away from the first opening a 1. The method can be selected according to actual use conditions, and the embodiment of the application is not particularly limited in this respect.

In some embodiments, the material of the casing 100 and the adjusting member 200 of the burner may be stainless steel, or may also be a high temperature alloy material such as copper, chromium, or manganese, which may be selected according to the actual use situation, and this is not particularly limited in this embodiment of the present invention.

It should be noted that, in the burner provided in the embodiment of the present application, the burner may be horizontally placed for use, may also be vertically placed for use, and may also be obliquely placed at a certain angle, which is not specifically limited in the embodiment of the present application. Horizontal placement means that the end cover 120 and the first opening a1 of the combustor are located at the same vertical height, vertical placement means that the end cover 120 and the first opening a1 of the combustor are located at different vertical heights, and the first opening a1 is located directly above or below the end cover 120, and inclined placement means that the end cover 120 and the first opening a1 of the combustor are located at different vertical heights, and the first opening a1 is not located directly above or below the end cover 120. Taking the example illustrated in fig. 1 and 2, which illustrate a situation in which the burner is placed vertically, the first opening a1 is located above the second opening a2, and the end cover 120 is disposed at the second opening a2, that is, the end cover 120 is located below the first opening a 1. Since the partition member 220 has a certain weight, the elastic member 210 is prevented from fatigue failure due to a long-term tension state in this placement manner, and the service life of the elastic member 210 can be prolonged. Of course, the position of the burner may be arranged according to the actual use requirement, and the embodiment of the present application is not particularly limited in this regard.

The operation of the in-burner adjusting part 200 according to the embodiment of the present invention will be described with reference to fig. 1 and 2.

With continued reference to fig. 1, in the first state (i.e. the low load state), the fan operates at a lower speed, and the mixed gas flow of the gas and the air with a small volume enters the diversion chamber c1 through the first opening a 1. Due to the low speed of the fan, the pressure of the mixed air flow entering the branch chamber c1 is low, and the pressure acting on the partition 220 is also low. Under the elastic force of the elastic member 210, the partitioning member 220 moves in a direction away from the cap 120, so that the volume of the flow dividing chamber c1 becomes smaller. At this time, the area of the fire hole 103 communicating with the branch chamber c1 is also small. The mixed gas flows out through the fire holes 103 communicated with the branch flow cavity c1, and the ignition combustion process is realized. In this process, the combustion fire holes 103 are maintained in a high state of thermal strength, so that backfire can be prevented and stable combustion can be realized.

With continued reference to fig. 2, in the second state (i.e. the heavy load state), the fan operates at a higher speed, and the mixed gas flow of the large volume of gas and air enters the diversion chamber c1 through the first opening a 1. Due to the high speed of the fan, the pressure of the mixed air flow entering the branch chamber c1 is high, and the pressure acting on the partition 220 is also high. The elastic member 210 is compressed in a direction toward the cap 120, and the partition member 220 moves toward a direction close to the cap 120, so that the volume of the flow dividing chamber c1 becomes large. At this time, the area of the fire hole 103 communicating with the branch chamber c1 is also large. The mixed gas flows out through the fire holes 103 communicated with the branch flow cavity c1, and the ignition combustion process is realized. In the process, the heat intensity of the combustion fire holes 103 is maintained in a reasonable state, so that the overhigh flame can be prevented, and the application range of the combustor is widened.

Therefore, in the burner provided by the embodiment of the application, the area of the fire hole 103 of the burner can be adjusted according to the position movement of the partition 220. The thermal strength of the burner ports 103 can be maintained within a reasonable range regardless of a small load state or a large load state, so that the burner can stably operate within a larger thermal load adjustment range.

It should be noted that the elastic force of the elastic member 210 may be set according to the pressure generated by the mixed gas flow and the area of the fire hole 103 to obtain the desired position of the partition member 220. The fire holes 103 may or may not be uniformly distributed on the side wall 102 of the burner. For example, the number of the fire holes 103 on the side wall 102 near the end cap 120 may be set to be greater than the number of the fire holes 103 on the side wall 102 near the first opening a 1. Of course, the number of the fire holes 103 may also be set according to the use requirement, and this is not particularly limited in the embodiment of the present application.

Based on the same inventive concept, the embodiment of the application also provides a burner, which comprises the burner in the embodiment. So, to the different pressures that different air currents produced, the regulating part can correspond the action, realize the dynamic change between reposition of redundant personnel chamber and the regulation chamber, make the fire hole area grow or diminish with reposition of redundant personnel chamber intercommunication, and then can increase the heat load turndown ratio of combustor through adjusting the fire hole area, thereby increased the heat load control range of combustor, the use of combustor has been expanded, make the combustor can adapt to more in service behavior, thereby the user demand of combustor has been satisfied.

The gas burner may be a wall-mounted furnace, a water heater, or other gas burners that require combustion using gas. The embodiment of the present application is not particularly limited to this. During the use of the burner, the flow rate of the mixed gas flow can be adjusted by combining with an adjusting device such as a proportional valve, so as to match the adjustment range of the heat load of the burner.

To sum up, the combustor overall structure that this application embodiment provided is simple, not only can guarantee abundant burning, can also adjust fire hole 103 area according to the actual load size for fire hole 103 hot strength remains throughout in more reasonable scope, not only can make flame burning stable, can also increase the heat load control range of combustor, expands the use of combustor, makes the combustor can adapt to more in service behavior, thereby satisfies the user demand of combustor.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A burner, comprising:

the fire-fighting device comprises a shell (100), wherein the shell (100) is provided with a bottom wall (101) and a side wall (102) surrounding the bottom wall (101), a plurality of fire holes (103) are formed in the side wall (102), and an accommodating cavity (c) with a first opening (a1) at one end is formed by enclosing the bottom wall (101) and the side wall (102); and

the adjusting piece (200) is arranged in the accommodating cavity (c); the adjusting member (200) comprises an elastic member (210) and a partition member (220), one end of the elastic member (210) is connected with the bottom wall (101), the other end of the elastic member (210) is connected with the partition member (220), and the accommodating cavity (c) is divided into a flow dividing cavity (c1) and an adjusting cavity (c2) which are independent of each other by the partition member (220);

wherein the branch chamber (c1) is in communication with the first opening (a1) such that an air flow can flow into the branch chamber (c1) via the first opening (a1) and out via the fire holes (103) in communication with the branch chamber (c 1);

the partition member (220) is movable toward or away from the bottom wall (101) in response to the pressure of the air flow entering the distribution chamber (c1) and the elastic force provided by the elastic member (210) to adjust to define the distribution chamber (c 1).

2. The burner of claim 1, further comprising a seal (300) provided at an outer edge of the partition (220);

the seal (300) is located between the divider (220) and the sidewall (102).

3. A burner according to claim 2, wherein said partition (220) has an abutment surface against said side wall (102);

at least part of the contact surface is covered with the sealing member (300).

4. A burner according to claim 3, characterized in that said partition (220) comprises a first flanging (221) in abutment with said lateral wall (102);

the surface of the first flap (221) facing the sidewall (102) and in contact with the sidewall (102) forms the abutment surface.

5. A burner according to claim 4, characterized in that the first flap (221) extends folded towards or away from the first opening (a 1).

6. Burner according to claim 1, wherein said bottom wall (101) is provided with a recess (1011) recessed away from said first opening (a 1);

one end of the elastic piece (210) is at least partially arranged in the groove (1011).

7. A burner according to any one of claims 1 to 6, wherein the casing (100) comprises a body (110) and an end cover (120) fixedly connected to the body (110);

the body (110) is internally provided with the accommodating cavity (c), the first opening (a1) and a second opening (a2) which is opposite to the first opening (a1) and is communicated with the accommodating cavity (c), and the end cover (120) is arranged at the second opening (a 2);

wherein an inner wall of the body (110) forms the side wall (102), and a side surface of the end cap (120) facing the first opening (a1) forms the bottom wall (101).

8. A burner according to claim 7, characterized in that said end cover (120) comprises a second cuff (121) abutting said side wall (102).

9. Burner according to claim 8, wherein the second flap (121) extends bent towards or away from the first opening (a 1).

10. A burner comprising a burner as claimed in any one of claims 1 to 9.

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