Upper air inlet burner and gas stove

Abstract

The application relates to the technical field of gas stoves, and discloses an upper air inlet burner and a gas stove. The upper air inlet burner is installed on a panel and comprises a plurality of fire covers and an ejector. The fire covers define a gas mixing chamber. The plurality of fire covers comprises: an inner fire cover which defines a first gas mixing chamber and is provided with a first fire hole in communication with the first gas mixing chamber; a middle fire cover which is sleeved on the outer side of the inner fire cover, defines a second gas mixing chamber, and is provided with a second fire hole and a third fire hole in communication with the second gas mixing chamber, the second fire hole being located on the inner side of the third fire hole; and an outer fire cover which is sleeved on the outer side of the middle fire cover, defines a third gas mixing chamber, and is provided with a fourth fire hole and a fifth fire hole in communication with the third gas mixing chamber, the fourth fire hole being located on the inner side of the fifth fire hole. The ejector is adapted to be arranged above the panel, and the outlet of the ejector is in communication with the gas mixing chamber and used for providing gas to the gas mixing chamber. The upper air inlet burner can further increase the fire outlet area, thereby increasing the fire uniformity.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas stoves, for example to an upper air inlet burner and a gas stove. BACKGROUND

[0002] At present, the existing upper air inlet burners on the market have problems such as low load and uneven fire.

[0003] In the related art, an upper air inlet burner is disclosed, which includes a panel, an ejector, a gas distribution disc and a fire cover. The ejector is arranged above the panel. The ejector includes a first ejector, a second ejector and a third ejector. The second ejector includes a second straight pipe and a second spiral pipe. The third ejector includes a third straight pipe and a third spiral pipe. The gas distribution disc includes an inner ring cavity, a middle ring cavity and an outer ring cavity. The second spiral pipe is connected to the bottom of the middle ring cavity from the second straight pipe. The third spiral pipe is connected to the bottom of the outer ring cavity from the third straight pipe. The first ejector is connected to the bottom of the inner ring cavity.

[0004] The fire cover includes an inner ring fire cover, a middle ring fire cover and an outer ring fire cover. The inner ring fire cover is arranged in the inner ring cavity. The middle ring fire cover is arranged on the middle ring cavity. The outer ring fire cover is arranged on the outer ring cavity. The inner ring fire cover is an infrared fire cover. The inner ring fire cover, the middle ring fire cover and the outer ring fire cover jointly form a three-ring fire.

[0005] In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

[0006] The upper air inlet burner in the related art is in the form of a three-ring fire. The flame area of the three-ring fire is limited, and the problem of uneven fire still exists. SUMMARY

[0007] In order to have a basic understanding of some aspects of the disclosed embodiments, the following is a simple summary. The summary is not a general review, nor is it intended to determine the key / important components or delineate the protection scope of these embodiments, but as a prelude to the detailed description below.

[0008] The embodiments of the present disclosure provide an upper air inlet burner and a gas stove to further improve the fire uniformity of the upper air inlet burner.

[0009] According to a first aspect of the embodiments of the present application, an upper air inlet burner is provided, which is installed on a panel, and comprises a plurality of fire covers and an ejector, the fire covers define a mixing chamber, and the plurality of fire covers comprises: an inner fire cover, which defines a first mixing chamber and is provided with a first fire hole in communication with the first mixing chamber; a middle fire cover, which is sleeved outside the inner fire cover, defines a second mixing chamber, and is provided with a second fire hole and a third fire hole in communication with the second mixing chamber, the second fire hole is located inside the third fire hole; and an outer fire cover, which is sleeved outside the middle fire cover, defines a third mixing chamber, and is provided with a fourth fire hole and a fifth fire hole in communication with the third mixing chamber, the fourth fire hole is located inside the fifth fire hole; wherein the ejector is adapted to be arranged above the panel, and an outlet of the ejector is in communication with the mixing chamber, for providing gas to the mixing chamber.

[0010] According to a second aspect of the embodiments of the present application, a gas stove is provided, which comprises the above-mentioned upper air inlet burner.

[0011] The upper air inlet burner and the gas stove provided by the embodiments of the present application can achieve the following technical effects:

[0012] When the burner is working, the first fire hole of the inner fire cover forms an inner ring fire. The gas in the second mixing chamber flows to the second fire hole and the third fire hole respectively, the second fire hole forms a second ring fire, and the third fire hole forms a third ring fire. The gas in the third mixing chamber flows to the fourth fire hole and the fifth fire hole respectively, the fourth fire hole forms a fourth ring fire, and the fifth fire hole forms a fifth ring fire. The upper air inlet burner provided by the embodiments of the present application forms a five-ring fire through the inner fire cover, the middle fire cover and the outer fire cover, which can further increase the fire area of the burner, and thus increase the fire uniformity and improve the heating uniformity of the pot.

[0013] The general description above and the following description below are exemplary and explanatory only and are not intended to be limiting. BRIEF DESCRIPTION OF DRAWINGS

[0014] One or more embodiments are illustrated by way of example in the figures that are not intended to be limiting of the application. Identical reference numbers in different figures identify identical, functionally similar, and / or structurally similar elements. Dimensions of elements in the figures can be exaggerated relative to other elements for clarity of explanation. Figures are not drawn to scale unless otherwise indicated. And, in some instances, detailed discussion of technologies incorporated by reference goes unfinished for the sake of brevity.

[0015] Figure 1 is a structural schematic diagram of an upper air inlet burner provided by the embodiments of the present application;

[0016] Figure 2 is a structural schematic diagram of one perspective of an outer fire cover provided by the embodiments of the present application;

[0017] Figure 3is a structural schematic view of another perspective of the outer fire cover provided by an embodiment of the present disclosure;

[0018] Figure 4 is Figure 3 is an enlarged structural schematic view of part A in the middle;

[0019] Figure 5 is a structural schematic view of one perspective of the middle fire cover provided by an embodiment of the present disclosure;

[0020] Figure 6 is a structural schematic view of another perspective of the middle fire cover provided by an embodiment of the present disclosure;

[0021] Figure 7 is Figure 6 is an enlarged structural schematic view of part B in the middle;

[0022] Figure 8 is a structural schematic view of one perspective of the gas distribution cover provided by an embodiment of the present disclosure;

[0023] Figure 9 is a structural schematic view of another perspective of the gas distribution cover provided by an embodiment of the present disclosure;

[0024] Figure 10 is a structural schematic view of one perspective of the gas distribution seat provided by an embodiment of the present disclosure;

[0025] Figure 11 is a structural schematic view of another perspective of the gas distribution seat provided by an embodiment of the present disclosure;

[0026] Figure 12 is a structural schematic view of the base provided by an embodiment of the present disclosure;

[0027] Figure 13 is a structural schematic view of the cooperation between the base and the liquid receiving tray provided by an embodiment of the present disclosure;

[0028] Figure 14 is a structural schematic view of another perspective of the upper air inlet burner provided by an embodiment of the present disclosure;

[0029] Figure 15 is an exploded structural schematic view of the upper air inlet burner provided by an embodiment of the present disclosure;

[0030] Figure 16 is a cross-sectional structural schematic view of the cooperation between the fire cover and the gas distribution cover provided by an embodiment of the present disclosure;

[0031] Figure 17 is a cross-sectional structural schematic view of the upper air inlet burner provided by an embodiment of the present disclosure.

[0032] Reference signs:

[0033] 10, outer fire cover; 101, third mixing chamber; 102, fourth fire hole; 1021, first fire hole group; 103, fifth fire hole; 1031, first flame stabilizing groove; 104, first recess of outer fire cover; 1041, outer annular outer mixing chamber; 1042, outer annular inner mixing chamber; 105, first sealing protrusion; 1051, through groove; 106, first fire transmission groove; 107, drill hole; 108, first outer side wall; 20, middle fire cover; 201, second mixing chamber; 202, second fire hole; 2021, second fire hole group; 203, third fire hole; 2031, second flame stabilizing groove; 204, first recess of middle fire cover; 2041, middle annular outer mixing chamber; 2042, middle annular inner mixing chamber; 205, second sealing protrusion; 206, second fire transmission groove; 2061, fire transmission hole; 2062, gathering groove; 2063, first groove-shaped passage; 2064, straight-through hole; 207, second outer side wall; 30, inner fire cover; 301, first fire hole; 40, gas distribution cover; 401, first gas distribution passage; 4011, first gas distribution plate; 4012, outer annular outer gas distribution passage; 4013, outer annular inner gas distribution passage; 402, second gas distribution passage; 4021, second gas distribution plate; 4022, middle annular outer gas distribution passage; 4023, middle annular inner gas distribution passage; 403, skirt; 4031, first limiting protrusion; 4032, second limiting protrusion; 4033, second arc-shaped surface; 404, first screw hole; 4041, partitioning matching part; 405, third gas distribution passage; 406, first protrusion; 4061, first protrusion of first gas distribution passage; 4062, first protrusion of second gas distribution passage; 407, gas outlet grid; 4071, first gas outlet grid; 4072, second gas outlet grid; 4073, first grid segment; 4074, second grid segment; 4075, third gas outlet grid; 4076, fourth gas outlet grid; 4077, third grid segment; 4078, fourth grid segment; 4079, stepped structure; 408, grid hole; 4081, bottom wall of gas distribution passage; 4082, second inclined surface; 409, bottom wall; 4091, inner annular wall; 4092, outer annular wall; 4093, first upper ejection passage; 4094, second upper ejection passage; 4095, third upper ejection passage; 4096, second groove-shaped passage; 50, gas distribution seat; 501, outer annular gas outlet passage; 5011, first gas outlet passage; 5012, second gas outlet passage; 502, middle annular gas outlet passage; 5021, third gas outlet passage; 5022, fourth gas outlet passage; 503, ejector; 5031, first ejector; 5032, first lower ejection passage; 5033, second ejector; 5034, second lower ejection passage; 5035, third ejector; 5036, third lower ejection passage; 504, partition plate; 5041, secondary air flow channel; 505, reinforcing rib; 506, partitioning part; 5061, first partitioning part; 5062, second partitioning part; 507, bottom wall of gas outlet passage; 5071, first inclined surface;508, first body; 5081, second body; 509, limiting hole; 5091, second screw hole; 5092, support column; 6, base; 601, air outlet; 602, first through hole; 6024, nozzle; 603, limiting fitting part; 6031, side vertical surface; 6032, first arc surface; 6033, limiting column; 604, support surface; 605, second connecting hole; 606, base body; 70, liquid receiving disc; 702, plug cap; 80, fire cover; 801, outer side wall; 8011, outer side fire hole; 8012, third wall segment; 8013, fourth wall segment; 802, inner side wall; 8021, inner side fire hole; 8022, first wall segment; 8023, second wall segment; 803, top wall; 804, gas mixing chamber; 8041, inner side gas mixing chamber; 8042, outer side gas mixing chamber; 805, transfer slot; 806, first main fire hole; 8061, first flame stabilizing hole; 8062, second main fire hole; 8063, second flame stabilizing hole; 8071, first step part; 8072, second step part. DETAILED DESCRIPTION

[0034] In order to enable a more detailed understanding of the features and technical content of the embodiments of the present disclosure, the implementation of the embodiments of the present disclosure is described in detail below, and the attached drawings are used for reference only and do not limit the embodiments of the present disclosure. In the following technical description, in order to facilitate explanation, through multiple details, a sufficient understanding of the disclosed embodiments is provided. However, one or more embodiments can still be implemented without these details. In other cases, in order to simplify the drawings, well-known structures and devices can be simplified.

[0035] The terms "first", "second", and the like in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present disclosure described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0036] In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "back" and the like indicate the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the embodiments of the present disclosure and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, in addition to indicating the orientation or positional relationship, the above-mentioned terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to the specific circumstances.

[0037] In addition, the terms "set", "connected", "fixed" should be broadly understood. For example, "connected" can be fixedly connected, detachably connected, or integrally configured; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to the specific circumstances.

[0038] Unless otherwise specified, the term "a plurality of" means two or more.

[0039] The term "and / or" is a description of the association relationship of the object, which means that there can be three relationships. For example, A and / or B means: A or B, or, A and B, three relationships.

[0040] It should be noted that the embodiments in the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0041] In combination Figures 1 to 17As shown, the upper air inlet burner is mounted on the panel, and the upper air inlet burner (hereinafter referred to as the burner) comprises a fire cover and an ejector 503 located above the panel. The primary air and the secondary air of the upper air inlet burner are both from above the panel. The fire cover 80 defines a gas mixing chamber 804 with a fire hole. The number of fire covers 80 is multiple, and the multiple fire covers 80 comprise an inner fire cover 30, a middle fire cover 20 and an outer fire cover 10 which are sequentially sleeved from inside to outside. The inner fire cover 30 defines a first gas mixing chamber, and the inner fire cover 30 is provided with a first fire hole 301 which is in communication with the first gas mixing chamber. The middle fire cover 20 defines a second gas mixing chamber 201, and the middle fire cover 20 is provided with a second fire hole 202 and a third fire hole 203 which are in communication with the second gas mixing chamber 201, and the second fire hole 202 is located on the inner side of the third fire hole 203. The outer fire cover 10 defines a third gas mixing chamber 101, and is provided with a fourth fire hole 102 and a fifth fire hole 103 which are in communication with the third gas mixing chamber 101, and the fourth fire hole 102 is located on the inner side of the fifth fire hole 103. The fire cover is located above the ejector 503, the outlet of the ejector 503 is in communication with the gas mixing chamber 804 of each fire cover, and the ejector 503 is used for providing fuel gas to the fire cover. The gas mixing chamber 804 comprises the first gas mixing chamber, the second gas mixing chamber 201 and the third gas mixing chamber 101. The fire hole comprises the first fire hole 301, the second fire hole 202, the third fire hole 203, the fourth fire hole 102 and the fifth fire hole 103.

[0042] In the embodiment, the burner can form a five-ring fire through the three fire covers, i.e., the inner fire cover 30, the middle fire cover 20 and the outer fire cover 10, so as to improve the flame area of the fire cover of the burner, and further improve the flame uniformity of the fire cover, thereby ensuring the uniformity of the burner in heating the pot.

[0043] Optionally, the number of the ejectors 503 is multiple, and the number of the ejectors 503 is the same as the number of the fire covers.

[0044] In the embodiment, each fire cover is in communication with the ejector 503, so as to ensure the fuel gas supply amount of each fire cover, and make the fuel gas supply of each fire cover independent, so as to realize multiple forms of fire and improve the use flexibility of the burner. Figure 9 As shown, the number of the ejectors 503 is three, and the three ejectors 503 comprise a first ejector 5031, a second ejector 5033 and a third ejector 5035.

[0045] Optionally, as shown, Figure 12 As shown, the upper air inlet burner further comprises a base 60 located below the ejector 503. The base 60 defines an air guide channel in communication with the inlet of the ejector 503. The number of the air guide channels is the same as and corresponds to the number of the ejectors 503.

[0046] In this embodiment, the base 60 supports the ejector 503 and the flame cap 80, positioning the ejector 503 above the panel and allowing a gap between the ejector 503 and the panel to facilitate the supply of primary and secondary air. The base 60 defines an air intake passage to facilitate the transfer of municipal gas or gas from a gas tank to the ejector 503.

[0047] For example, when there are three ejectors 503, there are three air intake channels, including a first air intake channel, a second air intake channel, and a third air intake channel. The outlet of the first air intake channel is connected to the inlet of the first ejector 5031, the outlet of the second air intake channel is connected to the inlet of the second ejector 5033, and the outlet of the third air intake channel is connected to the inlet of the third ejector 5035.

[0048] Optionally, each air intake channel includes a first through hole 602, a second through hole, and a first channel connecting the first through hole 602 and the second through hole. The first through hole 602 is located below the second through hole. The first channel extends vertically, with the first through hole 602 facing outwards and the second through hole facing inwards. The second through hole communicates with the inlet of the ejector 503; that is, the second through hole is the outlet of the air intake channel, and the first through hole 602 is the inlet of the air intake channel. The burner also includes nozzles 6024, which are located at the second through holes. The number of second through holes is the same as the number of air intake channels, and they correspond one-to-one. The number of nozzles 6024 is the same as the number of second through holes, and they correspond one-to-one.

[0049] Optionally, such as Figure 10 As shown, when the ejector 503 is linear, the axis of the nozzle 6024 is coaxial with the axis of the ejector 503 along the axial direction of the nozzle 6024. This ensures the stability of the combustion system, the effectiveness of primary air ejection, reduces flue gas emissions, and guarantees the combustion efficiency of the burner.

[0050] Optionally, the nozzle 6024 may be connected to the inlet of the ejector 503 or there may be a gap between them. When the nozzle 6024 is separated from the inlet of the ejector 503, that is, the nozzle 6024 does not contact the ejector 503. This coaxial arrangement ensures the ejection capability of the ejector 503 and increases the amount of primary air ejected.

[0051] Optionally, the nozzle 6024 is threadedly connected to the second through hole. The outer wall of the first through hole 602 is provided with external threads to facilitate connection with an external gas pipeline.

[0052] To facilitate processing, a third through hole can be provided at the bottom of the base 60. After the first channel is set through the third through hole, a sealing element is then set at the third through hole to seal the third through hole.

[0053] Optionally, the burner further comprises a valve body, the valve body is in communication with the inlets of the plurality of air guide channels, and is used for adjusting the air intake of each air guide channel.

[0054] In this embodiment, the valve body is internally provided with a plurality of channels, the channels are the same in number as the air guide channels and correspond one by one. The valve body is further provided with a switch, the switch can control the opening and closing of each channel, thereby controlling the on-off of the air guide channels and the ejector 503.

[0055] For example, the valve body is a three-way valve body, the switch of the valve body is linked with a button, the button is arranged outside the burner, and a user can adjust the opening and closing of each channel in the valve body by operating the button. For example, in actual application, when the knob is rotated to 90°, the burner is in an ignition state, and the three channels are fully open. When the knob is rotated to the last angle (for example, 180°, 230°, 270°), only one channel is open. When the knob is rotated to an angle between 90° and the last angle, two channels are open. When the knob is rotated to 0°-90°, the three channels are fully open, but the flow is small.

[0056] Through the forms of the three ejectors 503, the valve body and the three fire caps, the updraft burner can not only realize the shape of three fire caps and five ring fires, but also adjust the gas flow of each ejector 503, thereby adjusting the flame size of the five fire holes of the three fire caps, and further adjusting the out-fire flexibility of the burner.

[0057] Optionally, as shown in Figures 8 to 11 and Figure 15 The burner further comprises a gas distribution assembly, the gas distribution assembly comprises a gas distribution cover 40 and a gas distribution seat 50. The gas distribution cover 40 and the gas distribution seat 50 jointly define a gas channel and the ejector 503. The gas channel is configured with a gas inlet, the gas inlet is in communication with the outlet of the ejector 503 and the gas channel. The upper end of the gas distribution cover 40 defines a gas distribution channel and a gas outlet, and the gas in the gas channel can flow into the gas distribution channel through the gas outlet. The fire cap is arranged above the gas distribution channel. The number of the gas distribution channels is the same as and corresponds to the number of the fire caps. It can be understood that the gas distribution channel is in communication with the outlet of the ejector 503 and the mixing chamber 804 through the gas channel, that is, the gas or the mixed gas of air and gas (hereinafter collectively referred to as gas) flows through the air guide channel, the ejector 503, the gas inlet, the gas channel, the gas outlet, the gas distribution channel and the mixing chamber 804 in sequence, and then flows out through the fire hole of the fire cap.

[0058] In this embodiment, the gas distribution cover 40 and the gas distribution seat 50 jointly enclose the gas channel and the ejector 503, so as to provide gas to the fire cap, and the size of the burner can be saved. The gas distribution channel divides the gas flowing out of the gas channel, and then transmits the divided gas to the fire cap, thereby realizing the communication between the ejector 503 and the fire cap.

[0059] The mixing chamber 804 is located above the gas distribution channel. The mixing chamber 804 is connected to the gas distribution channel and together they form a mixing cavity. The mixing cavity ensures that the gas in the gas distribution channel does not leak out, so that it flows normally into the mixing chamber 804, and then flows out through the burner holes of the burner cap to facilitate combustion of the burner cap.

[0060] In the case of three burner caps, the gas distribution channels include a first gas distribution channel 401, a second gas distribution channel 402, and a third gas distribution channel 405, arranged sequentially from the inside out. A third mixing chamber 101 is connected to and located above the third gas distribution channel 405, and the third mixing chamber 101 and the third gas distribution channel 405 together form an outer ring mixing chamber. A second mixing chamber 201 is connected to and located above the second gas distribution channel 402, and the second mixing chamber 201 and the second gas distribution channel 402 together form a middle ring mixing chamber. A first mixing chamber is connected to and located above the first gas distribution channel 401, and the first mixing chamber and the first gas distribution channel 401 together form an inner ring mixing chamber.

[0061] Optionally, such as Figure 17 As shown, the inner wall of the air distribution cover 40 is provided with a limiting part, and the outer wall of the base 60 is provided with a limiting mating part 603. When the limiting part and the limiting mating part 603 are engaged, the air distribution cover 40 and the base 60 are restricted from rotating.

[0062] In this embodiment, the rotation between the gas distribution cover 40 and the base 60 is restricted, which can prevent the gas distribution assembly from rotating, thereby ensuring the coaxiality of the ejector 503 and the nozzle 6024.

[0063] Optionally, such as Figure 14 As shown, the vent cover 40 includes a vent cover body and a skirt 403. The vent cover body covers the vent seat 50, and the skirt 403 is located on the outer side of the vent cover body and extends circumferentially along the vent cover body. The skirt 403 is at least partially inclined downwards in the direction from the inside out. In this embodiment, the skirt 403 can prevent cooking liquids from flowing below the vent seat 50 and can guide the liquids to a supporting device, such as a drip tray 70.

[0064] Optionally, such as Figure 12 As shown, the base 60 includes a base body 606 and an air outlet 601. The air outlet 601 is located above the base body 606 and on one side of the inlet of the ejector tube 503. The nozzle 6024 is provided in the air outlet 601. The skirt 403 extends downward and is fitted onto the outer side of part of the base 60. The inner wall of the skirt 403 is provided with a limiting part, and the outer wall of the air outlet 601 is provided with a limiting fitting part 603.

[0065] In the embodiment, the lower end surface of the gas distribution cover 40 is connected with the upper end surface of the gas distribution seat 50 to form a gas passage and an ejector 503. The skirt 403 can extend downward to the base 60, and the gas outlet portion 601 is located at the upper end of the base 60 and at one side of the ejector 503, thereby facilitating the arrangement of the limiting portion and the limiting matching portion 603 to limit the rotation between the gas distribution cover 40 and the base 60.

[0066] Optionally, as shown in Figure 9 and Figure 17 , the limiting portion includes a first limiting protrusion 4031 protruding from the inner wall surface of the gas distribution cover 40, and the limiting matching portion 603 includes a side vertical surface 6031 located at at least one end of the outer wall surface of the gas outlet portion 601 along the circumferential direction thereof; when the limiting portion and the limiting matching portion 603 are matched, the first limiting protrusion 4031 and the side vertical surface 6031 are sequentially arranged along the circumferential direction of the gas outlet portion 601, and the first limiting protrusion 4031 is in abutment with the side vertical surface 6031.

[0067] In the embodiment, the first limiting protrusion 4031 is in abutment with the side vertical surface 6031 of the gas outlet portion 601, which can limit the rotation of the gas distribution cover 40 relative to the base 60 along the circumferential direction, thereby eliminating the freedom of rotation of the gas distribution assembly along the circumferential direction.

[0068] Optionally, the limiting portion further includes a second limiting protrusion 4032 protruding from the inner wall surface of the gas distribution cover 40 and sequentially and spaced apart from the first limiting protrusion 4031 along the circumferential direction of the gas distribution cover 40, and the length of the second limiting protrusion 4032 is less than the length of the first limiting protrusion 4031; when the limiting portion and the limiting matching portion 603 are matched, the second limiting protrusion 4032 is located above the gas outlet portion 601 and abuts against the upper wall surface of the gas outlet portion 601, and the limiting matching portion 603 includes the upper wall surface of the gas outlet portion 601.

[0069] In the embodiment, the second limiting protrusion 4032 cooperates with the first limiting protrusion 4031 to limit the rotation of the gas distribution cover 40 relative to the base 60, and also serves as a positioning function to facilitate the installation of the gas distribution assembly and the base 60.

[0070] Optionally, the limiting portion further includes a first arc surface 6032 located at the inner wall surface of the gas distribution cover 40, and the limiting matching portion 603 further includes a second arc surface 4033 located at the outer wall surface of the gas outlet portion 601 facing the gas distribution cover 40; when the limiting portion and the limiting matching portion 603 are matched, the first arc surface 6032 is in abutment with the second arc surface 4033.

[0071] In the embodiment, the first arc surface 6032 and the second arc surface 4033 are in contact, so that the gas distribution assembly cannot move radially relative to the base 60, thereby making the gas distribution assembly have no freedom in the front, back, left and right directions.

[0072] As shown in Figure 9 , the first limiting protrusion 4031, the second limiting protrusion 4032 and the second arc surface 4033 are all arranged on the inner wall surface of the skirt 403.

[0073] Optionally, as shown in Figure 12 , the upper surface of the base body 606 is provided with a supporting surface 604, and the lower surface of the gas distribution seat 50 is provided with a supporting column 5092. When the gas distribution assembly is arranged above the base 60, the supporting surface 604 abuts against the supporting column 5092 to realize positioning and cooperation of the gas distribution assembly and the base 60. In the embodiment, the cooperation of the supporting surface 604 and the supporting column 5092 facilitates the installation and positioning of the base 60 and the gas distribution seat 50, thereby facilitating the installation of the gas distribution assembly on the base 60.

[0074] Optionally, the number of the supporting surface 604 is multiple, and the number of the supporting column 5092 is the same as and corresponds to the number of the supporting surface 604. Figure 12

[0075] Optionally, the gas distribution seat 50 is provided with a limiting hole 509 penetrating in the thickness direction thereof, and the upper surface of the base body 606 is provided with a limiting column 6033. When the gas distribution assembly is arranged above the base 60, the limiting column 6033 is located in the limiting hole 509. In the embodiment, by penetrating the limiting hole 509, the limiting column 6033 can be limited to rotate in the limiting hole 509, thereby limiting the rotation of the gas distribution seat 50 relative to the base 60.

[0076] Optionally, the size of the inner diameter of the limiting hole 509 is 0.3-0.5 mm larger than the size of the outer diameter of the limiting column 6033. In this way, the limiting column 6033 can be inserted into the limiting hole 509, and the limiting hole 509 can also limit the rotation of the limiting column 6033. Specifically, the size of the inner diameter of the limiting hole 509 can be 0.3 mm, 0.4 mm, 0.5 mm, etc. larger than the size of the outer diameter of the limiting column 6033.

[0077] Optionally, the number of the limiting column 6033 is multiple, and the number of the limiting hole 509 is the same as and corresponds to the number of the limiting column 6033.

[0078] ​Optionally, the burner further comprises a thermocouple and an ignition needle, and the at least two limiting columns 6033 are provided with through holes, and the thermocouple and / or the ignition needle pass through the through holes of the limiting columns 6033 and then pass through the limiting holes 509, so as to cooperate with the fire cap to extinguish and / or ignite the fire.

[0079] Optionally, the gas distribution cover 40 and the gas distribution seat 50 are detachably connected or fixedly connected. The detachable connection facilitates the installation, disassembly and cleaning of the gas distribution cover 40 and the gas distribution seat 50. The fixed connection facilitates the taking of the gas distribution cover 40 and the gas distribution seat 50 and increases the structural stability.

[0080] When the gas distribution cover 40 and the gas distribution disc are detachably connected, the outer peripheral wall of the gas distribution cover 40 body is provided with a first screw hole 404, the outer peripheral wall of the gas distribution seat 50 is provided with a second screw hole 5091, the first screw hole 404 and the second screw hole 5091 correspond to each other, and a first fastener penetrates the first screw hole 404 and the second screw hole 5091 to connect the gas distribution cover 40 and the gas distribution seat 50; wherein the upper end of the skirt 403 is located above the first screw hole 404, and the lower end of the skirt 403 extends to the outside of the first screw hole 404, or the lower end of the skirt 403 extends to the outside of the second screw hole 5091.

[0081] In this embodiment, the gas distribution seat 50 and the gas distribution cover 40 are connected by screws, which facilitates the installation, disassembly and cleaning of the gas distribution seat 50 and the gas distribution cover 40. The skirt 403 can shield the screw hole to increase the aesthetics of the burner and avoid the soup flowing to the screw hole to affect the use of the screw hole.

[0082] Optionally, the number of the first screw holes 404 is multiple, and the multiple first screw holes 404 are sequentially and spacedly arranged along the circumference of the gas distribution cover 40. The number of the second screw holes 5091 is the same as and corresponds to the number of the first screw holes 404, so as to increase the connection strength of the gas distribution cover 40 and the gas distribution disc.

[0083] Optionally, as shown in Figure 13 The burner further comprises a liquid receiving disc 70, the liquid receiving disc 70 is located between the gas distribution seat 50 and the base 60, and a gap exists between the gas distribution seat 50 and the liquid receiving disc 70 to facilitate the air flow; wherein the liquid receiving disc 70 is provided with a relief hole (hereinafter referred to as a first relief hole for convenience), and the upper end of the air guide channel penetrates the first relief hole and is in communication with the ejector 503.

[0084] In this embodiment, the gas enters the air guide channel of the base 60 from below the panel through the pipeline, and the base 60 supports the ejector 503 at a certain distance from the panel. The liquid receiving disc 70 is used to receive the soup of the pot, and the relief hole of the liquid receiving disc 70 can facilitate the outlet of the air guide channel to correspond to and communicate with the inlet of the ejector 503.

[0085] Optionally, the liquid cup 70 is further provided with a first connecting hole, the base 60 is provided with a second connecting hole 605, and a second fastener penetrates through the first connecting hole and the second connecting hole 605 to realize the connection of the liquid cup 70 and the base 60; optionally, the liquid cup 70 is attached to the base 60, and there is a gap between the liquid cup 70 and the lower surface of the gas distribution seat 50, so as to facilitate the flow of air into the burner.

[0086] Optionally, as shown in Figure 13 the burner further comprises a plug cap 702 which is matched with the first connecting hole, and when the liquid cup 70 is separated from the base 60, the plug cap 702 can be arranged above the first connecting hole.

[0087] In this embodiment, the first connecting hole of the liquid cup 70 is provided with a plug cap 702 after the gas distribution assembly and the fire cap combination are taken away, which can prevent oil stains from reaching the screw position and being difficult to clean.

[0088] The liquid cup 70 is further provided with a second avoiding hole, and the supporting surface 604 of the base 60 extends above the liquid cup 70 through the second avoiding hole and abuts against the supporting column 5092. As shown in Figure 13 , the number of first connecting holes is three, and the number of plug caps 702 is also three. After the gas distribution assembly and the fire cap are taken down, the upper surface of the liquid cup 70 only has 5 protrusions (three plug caps 702 and two supporting surfaces 604), an ignition needle and a thermocouple, and an air outlet part 601, which is easy to clean.

[0089] Optionally, the burner further comprises a gas distribution plate which is located in the mixing chamber and extends along the circumference of the mixing chamber to separate the mixing chamber into an inner mixing chamber and an outer mixing chamber. The inner mixing chamber is in communication with the inner fire hole 8021 of the fire cap, and the outer mixing chamber is in communication with the outer fire hole 8011 of the fire cap.

[0090] In this embodiment, the gas distribution plate separates the mixing chamber into two inner and outer mixing chambers, which can avoid the inner fire hole 8021 and the outer fire hole 8011 of the fire cap competing for gas to ensure the normal combustion of the inner fire hole 8021 and the outer fire hole 8011. Specifically, the gas distribution plate can separate an air distribution channel into an inner air distribution channel and an outer air distribution channel, and separate a mixing chamber 804 of a fire cap into an inner mixing chamber 8041 and an outer mixing chamber 8042.

[0091] Optionally, each fire cover is annular, and the fire cover 80 comprises a top wall 803, an outer sidewall 801 and an inner sidewall 802 when the fire cover is the outer fire cover 10 and / or the middle fire cover 20, the top wall 803 is annular. The outer sidewall 801 is located below the top wall 803 and is annular, and the outer sidewall 801 is provided with an outer side fire hole 8011. The inner sidewall 802 is located below the top wall 803 and is located inside the outer sidewall 801, and the inner sidewall 802 is annular, and the inner sidewall 802 is provided with an inner side fire hole 8021. The inner sidewall 802, the outer sidewall 801 and the top wall 803 jointly define a gas mixing chamber 804. When the fire cover is the inner fire cover 30, the inner fire cover 30 comprises an outer side plate and a top plate, the outer side plate is annular and is located below the top plate, and the outer side plate is provided with a first fire hole 301.

[0092] In some optional embodiments, the fire hole of the fire cover comprises a main fire hole and a flame stabilizing hole, wherein the fire cover is provided with a main fire hole (corresponding to the first fire hole 301, the second fire hole 202, the third fire hole 203, the fourth fire hole 102 and / or the fifth fire hole 103 described above) and a flame stabilizing hole, wherein the number of the main fire hole and the flame stabilizing hole is multiple, the multiple main fire holes are sequentially and spaced apart along the circumference of the fire cover, and the multiple flame stabilizing holes are also sequentially and spaced apart along the circumference of the fire cover, and the outer wall surface of the sidewall of the fire cover is further provided with a flame stabilizing groove, the flame stabilizing groove extends along the circumference of the fire cover, the inlet end of the flame stabilizing hole is in communication with the gas mixing chamber 804, and the outlet end of the flame stabilizing hole is in communication with the flame stabilizing groove.

[0093] In some optional embodiments, as shown in Figure 6 The main fire hole comprises a first main fire hole 806, and the flame stabilizing hole comprises a first flame stabilizing hole 8061, and at least two first flame stabilizing holes 8061 are arranged between every two adjacent first main fire holes 806. In this embodiment, the distance between the two first main fire holes 806 is large, and at least two first flame stabilizing holes 8061 are arranged between the two adjacent first main fire holes 806, so as to ensure that the gas flow at the flame stabilizing groove is sufficient and prevent misfire.

[0094] Optionally, the flame stabilizing groove is located below the first main fire hole 806, and the height of the center of the first flame stabilizing hole 8061 is less than the height of the center of the first main fire hole 806.

[0095] In this embodiment, the height of the center of the first flame stabilizing hole 8061 is less than the height of the center of the first main fire hole 806, and the first flame stabilizing hole 8061 can stabilize the middle and lower parts of the first main fire hole 806.

[0096] Optionally, the number of the first main fire holes 806 is 18-22. If the number of the first main fire holes 806 is too much, the density of the first main fire holes 806 is too large, and adjacent first main fire holes 806 are prone to compete for air, resulting in smoke. If the number of the first main fire holes 806 is too small, the distance between adjacent first main fire holes 806 is too large, and it is not easy to form a ring-shaped fire, which is not conducive to heating of the burner. For example, the number of the first main fire holes 806 is 18, 20, or 22.

[0097] Optionally, the number of the at least two first flame stabilizing holes 8061 is 2-5. For example, the number of the first flame stabilizing holes 8061 between two adjacent first main fire holes 806 is 2, 3, 4, or 5. If the number of the first flame stabilizing holes 8061 is too much, adjacent first flame stabilizing holes 8061 compete for air, which is prone to produce smoke. For example, as shown in the figure, three first flame stabilizing holes 8061 are arranged between two adjacent first main fire holes 806. Figure 6

[0098] In one specific embodiment, the outer side wall 801 of the fire cap is provided with the first main fire hole 806, the first flame stabilizing hole 8061, and the flame stabilizing groove. The inner side wall 802 of the fire cap is provided with a fire hole group in communication with the gas mixing chamber 804, the fire hole group comprising one second main fire hole 8062 and at least two second flame stabilizing holes 8063, the second flame stabilizing holes 8063 being in communication with the gas mixing chamber 804 and the outside, and two of the at least two second flame stabilizing holes 8063 being respectively located on the two sides of the second main fire hole 8062.

[0099] In this embodiment, the two sides of one second main fire hole 8062 are respectively provided with the second flame stabilizing hole 8063, the second flame stabilizing hole 8063 stabilizing the flame from two directions, which can enhance the flame stabilizing effect of the second main fire hole 8062.

[0100] Optionally, the number of the fire hole group is multiple, and the multiple fire hole groups are sequentially and spaced apart along the circumference of the fire cap. The multiple fire hole groups are spaced apart, which can avoid competition for air between the multiple fire hole groups, reduce the smoke value, and facilitate processing of the fire cap.

[0101] In one specific embodiment, when the fire cap 80 is a middle fire cap 20, the inner side wall 802 of the middle fire cap 20 is provided with a second fire hole group 2021, and the number of the second fire hole group 2021 is 8-12.

[0102] If the number of the second fire hole group 2021 is more than 12, adjacent second fire hole groups 2021 compete for air, which is prone to produce smoke. If the number of the second fire hole group 2021 is less than 8, the distance between adjacent fire hole groups is too large, resulting in uneven flame of the fire cap on the ring line thereof.

[0103] ​Optionally, the number of the fourth main flame holes (first flame holes 301) of the inner flame cap 30 is the same as the number of the second flame hole group 2021 of the middle flame cap 20, wherein the fourth main flame holes of the inner flame cap 30 and the flame hole group of the middle flame cap 20 are staggered. This avoids the intersection of the first and second ring flames and reduces the generated smoke.

[0104] For example, the number of the second flame hole group 2021 can be 8, 10, or 12. Correspondingly, the number of the fourth main flame holes of the inner flame cover 30 can also be 8, 10, or 12.

[0105] Optionally, the number of the first main flame hole 806 (third flame hole 203) on the outer side wall 801 of the middle flame cover 20 is the same as the number of the third main flame hole (fourth flame hole 102) on the inner side wall 802 of the outer flame cover 10. The first main flame hole 806 and the third main flame hole are staggered to avoid competition for air between them and reduce smoke generation.

[0106] For example, such as Figure 1 As shown, when the burner includes three burner caps, the outer wall 801 of the outer burner cap 10 is provided with a fifth main burner hole (fifth burner hole 103) and a first flame stabilizing groove 1031, the inner wall 802 of the outer burner cap 10 is provided with a first burner hole group 1021, the outer wall 801 of the middle burner cap 20 is provided with a first main burner hole 806 and a second flame stabilizing groove 2031, the inner wall 802 of the middle burner cap 20 is provided with a second burner hole group 2021, and the outer wall 801 of the inner burner cap 30 is provided with a fourth main burner hole.

[0107] Optionally, such as Figure 16 and Figure 17 As shown, the upper end of the gas distribution plate is connected to the lower wall of the flame cover 80 by radial sealing and end face sealing, and / or, the lower end of the gas distribution plate is connected to the upper wall of the gas distribution cover 40 by radial sealing and end face sealing.

[0108] In this embodiment, the gas distribution plate and the flame cover 80 or the gas distribution cover 40 are sealed together by a combination of radial sealing and end face sealing. This enhances the airtightness and independence of the outer and inner mixing chambers, thereby preventing cross-contamination between the inner and outer mixing chambers.

[0109] In one specific embodiment, when the upper end of the gas distribution plate and the lower wall of the flame cap 80 are connected in a radial and end-face sealing manner, one of the upper end of the gas distribution plate and the lower wall of the flame cap 80 is provided with a first groove, and the other of the upper end of the gas distribution plate and the lower wall of the flame cap 80 is provided with a first protrusion 406 that matches the first groove. When the first protrusion 406 is located in the first groove, the upper end of the gas distribution plate and the lower wall of the flame cap can achieve a radial and end-face sealing connection.

[0110] In the embodiment, the first protrusion 406 and the first groove structure are simple and easy to process, realize two cavities of the single fire cover, and further realize two ring fires of the single fire cover, and the adjacent two mixed gas cavities do not leak. Moreover, the structure of the first protrusion 406 and the first groove can realize two radial seals and one end face seal, thereby improving the sealing effect.

[0111] In another specific embodiment, in the case that the lower end of the gas distribution plate is connected to the upper wall of the gas distribution cover 40 by radial seal and end face seal, one of the lower end of the gas distribution plate and the upper wall of the gas distribution cover 40 is provided with a second groove, and the other of the upper end of the gas distribution plate and the upper wall of the gas distribution cover 40 is provided with a second protrusion matched with the second groove. When the second protrusion is located in the second groove, the lower end of the gas distribution plate and the upper wall of the gas distribution cover 40 can be connected by radial seal and end face seal. Similarly, the second protrusion and the second groove structure are simple and easy to process, and have good sealing effect. It can also realize the setting of two cavities of the single fire cover, and further realize two ring fires of the single fire cover, and the adjacent two mixed gas cavities do not leak. The structure of the second protrusion and the second groove can realize two radial seals and one end face seal, thereby improving the sealing effect.

[0112] As shown in Figure 8 and Figure 16 , the gas distribution cover 40 includes a bottom wall 409, an outer ring wall 4092 and an inner ring wall 4091. The bottom wall 409 is annular. The outer ring wall 4092 is located above the bottom wall 409 and is annular. The inner ring wall 4091 is located above the bottom wall 409 and is located inside the outer ring wall 4092 and is annular. The bottom wall 409, the outer ring wall 4092 and the inner ring wall 4091 together enclose a gas distribution passage. The lower end of the outer side wall 801 is provided with a first step portion 8071, and the upper end of the outer ring wall 4092 is matched with the first step portion 8071. The lower end of the inner side wall 802 is provided with a second step portion 8072, and the upper end of the inner ring wall 4091 is matched with the second step portion 8072.

[0113] In the embodiment, the first step portion 8071 and the second step portion 8072 are provided, so that the fire cover and the gas distribution cover 40 can also realize end face seal and one side radial seal, thereby ensuring the sealing effect of the inner and outer sides of the fire cover and the gas distribution cover 40, and avoiding gas leakage.

[0114] Each of the second gas distribution passage 402 and the third gas distribution passage 405 is provided with the above-mentioned bottom wall 409, outer ring wall 4092 and inner ring wall 4091, so that the middle fire cover 20 and the outer fire cover 10 can be matched with the corresponding gas distribution passage to form a mixed gas cavity.

[0115] Optionally, when the fire cover 80 is the outer fire cover 10 and / or the middle fire cover 20, the inner side wall 802 of each fire cover comprises a first wall segment 8022 and a second wall segment 8023 connected to each other, the first wall segment 8022 is provided with an inner side fire hole 8021; the second wall segment 8023 is arranged below the first wall segment 8022; when the lower end of the inner side wall 802 is configured with a second step portion 8072, the second wall segment 8023 is configured with the second step portion 8072, wherein the first wall segment 8022 is inclined downward in the direction from outside to inside. In this embodiment, the first wall segment 8022 is inclined downward in the direction from outside to inside, that is, the upper surface of the first wall segment 8022 is upward, so that the fire outlet angle of the inner side fire hole 8021 of the first wall segment 8022 is upward. Thus, the fire outlet of the inner side fire hole 8021 is facilitated, so that the flame at the inner side fire hole 8021 heats the pot.

[0116] Optionally, when the fire cover is the outer fire cover 10 and / or the middle fire cover 20, the outer side wall 801 comprises a third wall segment 8012 and a fourth wall segment 8013, the third wall segment 8012 is provided with an outer side fire hole 8011; the fourth wall segment 8013 is arranged below the third wall segment 8012; when the lower end of the outer side wall 801 is configured with a first step portion 8071, the fourth wall segment 8013 is configured with the first step portion 8071, wherein when the first step portion 8071 is matched with the outer ring wall 4092, the outer wall surface of the third wall segment 8012 is flush with the outer wall surface of the outer ring wall 4092. In this embodiment, when the first step portion 8071 is matched with the outer ring wall 4092, the first step portion 8071 is located inside the outer ring wall 4092, and the outer wall surface of the third wall segment 8012 is flush with the outer wall surface of the outer ring wall 4092, which not only realizes the sealing connection of the fire cover with the outer side of the gas distribution cover 40, but also increases the connection beauty and smoothness of the fire cover and the gas distribution disc.

[0117] Optionally, when the second step portion 8072 is matched with the inner ring wall 4091, the second step portion 8072 is located inside the inner ring wall 4091. When the first step portion 8071 is matched with the outer ring wall 4092, the first step portion 8071 is located inside the outer ring wall 4092.

[0118] Optionally, when the lower end of the gas distribution plate is connected with the upper wall surface of the gas distribution cover 40, the gas distribution plate is connected with the bottom wall 409 and located between the outer ring wall 4092 and the inner ring wall 4091. Wherein, the gas distribution plate protrudes from the outer ring wall 4092 and the inner ring wall 4091. In this example, the gas distribution plate protrudes from the outer ring wall 4092 and the inner ring wall 4091, which facilitates the abutment or connection of the gas distribution plate with the lower wall surface of the fire cover, while realizing the separation effect of the gas distribution plate.

[0119] Optionally, the number of gas distribution plates is multiple, and the multiple gas distribution plates include a first gas distribution plate 4011 located in the outer annular mixing chamber and extending along the circumference of the outer annular mixing chamber to separate the outer annular mixing chamber into a first mixing chamber and a second mixing chamber, the first mixing chamber being located outside the second mixing chamber, the first mixing chamber being in communication with the fifth fire hole 103, and the second mixing chamber being in communication with the fourth fire hole 102. The outer side mixing chamber includes the first mixing chamber, the inner side mixing chamber includes the second mixing chamber, the outer side fire hole 8011 includes the fifth fire hole 103, and the inner side fire hole 8021 includes the fourth fire hole 102. The arrangement of the first gas distribution plate 4011 divides the outer fire cover 10 into two independent cavities, thereby avoiding competition for gas by the fourth fire hole 102 and the fifth fire hole 103.

[0120] The first gas distribution plate 4011 separates the third mixing chamber 101 into an outer annular outer mixing chamber 1041 and an outer annular inner mixing chamber 1042 which are sequentially arranged from the outside to the inside, and separates the third gas distribution passage 405 into an outer annular outer gas distribution passage 4012 and an outer annular inner gas distribution passage 4013 which are sequentially arranged from the outside to the inside.

[0121] Optionally, as shown in Figure 16 The multiple gas distribution plates further include a second gas distribution plate 4021 located in the middle annular mixing chamber and extending along the circumference of the middle annular mixing chamber to separate the middle annular mixing chamber into a third mixing chamber and a fourth mixing chamber, the third mixing chamber being located outside the fourth mixing chamber, the third fire hole 203 being in communication with the third mixing chamber, and the second fire hole 202 being in communication with the fourth mixing chamber. The outer side mixing chamber includes the third mixing chamber, the inner side mixing chamber includes the fourth mixing chamber, the outer side fire hole 8011 includes the third fire hole 203, and the inner side fire hole 8021 includes the second fire hole 202. The arrangement of the first gas distribution plate 4011 divides the middle fire cover 20 into two independent cavities, thereby avoiding competition for gas by the second fire hole 202 and the third fire hole 203.

[0122] The second gas distribution plate 4021 separates the second mixing chamber 201 into a middle annular outer mixing chamber 2041 and a middle annular inner mixing chamber 2042 which are sequentially arranged from the outside to the inside, and separates the second gas distribution passage 402 into a middle annular outer gas distribution passage 4022 and a middle annular inner gas distribution passage 4023 which are sequentially arranged from the outside to the inside.

[0123] Optionally, the outlet of the first ejector 5031 is in communication with the first mixing chamber, and the outlet of the second ejector 5033 is in communication with the second mixing chamber. The outlet of the first ejector 5031 is in communication with the third mixing chamber, and the outlet of the second ejector 5033 is in communication with the fourth mixing chamber. The outlet of the third ejector 5035 is in communication with the inner annular mixing chamber.

[0124] It can be understood that the first injector 5031 provides fuel gas for the first mixing chamber and the third mixing chamber, and the second injector 5033 provides fuel gas for the second mixing chamber and the fourth mixing chamber. In this way, one injector 503 provides fuel gas for two mixing chambers of two fire covers at the same time, which facilitates the adjustment of the gas supply of the two mixing chambers at the same time, and facilitates the arrangement of the three injectors 503, the three fire covers and the gas distribution assembly, and facilitates the formation of the five-ring fire shape of the burner.

[0125] Optionally, the fire cover is also provided with a fire transfer groove 805, which penetrates the inner side wall 802, the top wall 803 and the outer side wall 801 in sequence, and the fire transfer groove 805 is upwardly open and communicates with the mixing chamber 804.

[0126] In this embodiment, the fire cover can be an outer fire cover 10 or a middle fire cover 20. When the fire cover is the middle fire cover 20, the middle fire cover 20 is provided with a first fire transfer groove 106 for transferring fire between the two-ring fire and the three-ring fire. When the fire cover is the outer fire cover 10, the outer fire cover 10 is provided with a second fire transfer groove 206 for transferring fire between the four-ring fire and the five-ring fire.

[0127] Optionally, as shown in Figures 2 to 6 When the fire cover is provided with a first recess and the gas distribution cover 40 is provided with a first protrusion 406, the fire cover further comprises a sealing protrusion, which is arranged at at least one groove wall of the first recess corresponding to the fire transfer groove 805, and the sealing protrusion extends downward. When the fire cover is arranged on the gas distribution cover 40, the sealing protrusion can be in close contact with the first protrusion 406 to realize the radial sealing of the fire cover and the gas distribution cover 40 at the fire transfer groove 805.

[0128] In this embodiment, the sealing protrusion can increase the sealing effect of the inner side mixing chamber and the outer side mixing chamber, and avoid air leakage of the inner side mixing chamber and the outer side mixing chamber at the fire transfer groove 805.

[0129] Optionally, the fire transfer groove 805 penetrates the groove wall of the first recess, and the upper end of the sealing protrusion is provided with a through groove 1051, which communicates with the fire transfer groove 805. In this way, the first recess and the sealing protrusion can avoid blocking the fire transfer channel of the fire transfer groove 805, so as to ensure the stability of the fire transfer of the fire transfer groove 805.

[0130] Optionally, as shown in Figure 16 The opposite two side walls of the fire transfer groove 805 are both provided with a drill hole 107, one end of the drill hole 107 communicates with the first outer side mixing chamber 8042, and the other end of the drill hole 107 is closed. The outer side mixing chamber 8042 comprises an outer ring outer mixing chamber 1041. In the direction from inside to outside, the drill hole 107 is inclined upward.

[0131] In the embodiment, the drilling hole 107 makes the gas in the outer ring outer gas mixing chamber 1041 have a tendency to flow outward, and can increase the ignition performance of the ignition groove 805. If there is no drilling hole 107, the gas mainly flows vertically upward through the flame stabilizing groove, and the outward flow intersects, affecting the ignition performance of the ignition groove 805.

[0132] Optionally, when the fire cover is the outer fire cover 10, the outer side wall 801 comprises a first outer side wall 108, the first outer side wall 108 is further provided with a first flame hole 8061 and a first flame stabilizing groove 1031, the inlet end of the first flame hole 8061 is in communication with the outer ring outer gas mixing chamber 1041, the outlet of the first flame hole 8061 is in communication with the first flame stabilizing groove 1031, and the first flame stabilizing groove 1031 is in communication with the outside. Wherein, the drilling hole 107 is located above the first flame hole 8061.

[0133] The inner end of the drilling hole 107 is located above the first flame hole 8061 and below the ignition groove 805, which can increase the depth of the drilling hole 107, thereby increasing the gas guiding capacity of the drilling hole 107.

[0134] Optionally, in the direction from inside to outside, the first flame hole 8061 is inclined upward, wherein the inclination angle of the first flame hole 8061 is greater than the inclination angle of the drilling hole 107.

[0135] In the embodiment, the inclination angle of the drilling hole 107 is smaller than the inclination angle of the flame hole, so that the gas guided through the drilling hole 107 can flow out from the outer end of the ignition groove 805, and the flame at the outer end of the ignition groove 805 is avoided to deviate, thereby ensuring that the flame of the ignition groove 805 can be stably transmitted to the main flame hole and the flame stabilizing groove.

[0136] Optionally, the first outer side wall 108 is further provided with a fifth flame hole 103, the diameter of the drilling hole 107 is smaller than the diameter of the fifth flame hole 103, and greater than the diameter of the first flame hole 8061. In this way, the gas inlet amount of the drilling hole 107 can be ensured, thereby ensuring the guiding amount of the drilling hole 107 to the gas, and the fifth flame hole 103 adjacent to the drilling hole 107 can also be prevented from competing for the gas, so as to ensure the flame burning of the fifth flame hole 103 adjacent to the drilling hole 107.

[0137] Optionally, when the fire cover is the middle fire cover 20, the outer side wall 801 comprises a second outer side wall 207, the second outer side wall 207 is provided with a second sealing protrusion 205, the second sealing protrusion 205 and the second outer side wall 207 are in an integrated structure, the second outer side wall 207 is provided with a second flame stabilizing groove 2031, the bottom of the second sealing protrusion 205 is provided with a second flame hole 8063, the inlet end of the second flame hole 8063 is in communication with the middle ring outer gas mixing chamber 2041, the outlet end of the second flame hole 8063 is in communication with the second flame stabilizing groove 2031, and the outer side gas mixing chamber 8042 comprises the middle ring outer gas mixing chamber 2041.

[0138] In the embodiment, the second sealing protrusion 205 is provided with a second flame stabilizing hole 8063, which can ensure that the second flame stabilizing groove 2031 corresponding to the second sealing protrusion 205 can be in communication with the outer mixing gas chamber 2041 of the middle ring, so as to improve the uniformity of the flame outlet of the flame cover.

[0139] Optionally, the two connection positions of the inner wall surface of the second sealing protrusion 205 and the second outer side wall 207 are provided with third fire holes 203. The connection position of the inner wall surface of the second sealing protrusion 205 and the second outer side wall 207 is provided with the third fire hole 203, so that the second sealing protrusion 205 can also be provided with a fire hole, thereby ensuring the uniformity of the flame outlet of the flame cover.

[0140] Optionally, the number of the second flame stabilizing holes 8063 at the second sealing protrusion 205 is multiple, and the multiple second flame stabilizing holes 8063 are located between the two third fire holes 203. Because the spacing between the two third fire holes 203 is large, the multiple second flame stabilizing holes 8063 can ensure that the flow of the second flame stabilizing groove 2031 is sufficient, and prevent poor fire transmission.

[0141] Optionally, as shown in Figure 6 and Figure 7 , the inner side wall 802 of the flame cover is also provided with a fire transmission hole 2061 in communication with the mixing gas chamber 804, the fire transmission hole 2061 corresponds to the fire transmission groove 805, and the inner wall surface of the mixing gas chamber 804 corresponding to the fire transmission hole 2061 is recessed to form an accumulation groove 2062.

[0142] In the embodiment, the fire transmission hole 2061 is used to transmit the flame between the inner side wall 802 and the outer side wall 801 of the flame cover. The accumulation groove 2062 is provided, so that the fuel gas can be accumulated in the accumulation groove 2062, thereby ensuring the fuel gas supply amount at the fire transmission hole 2061. In turn, the fire transmission efficiency of the fire transmission hole 2061 is ensured.

[0143] The accumulation groove 2062 is in communication with the fire transmission groove 805, so as to facilitate the communication between the fire transmission hole 2061 and the fire transmission groove 805.

[0144] Optionally, the inner wall surface of the top wall 803 of the flame cover and / or the inner wall surface of the inner side wall 802 is recessed to form the accumulation groove 2062.

[0145] Optionally, the flame cover is provided with a first recess, and the first recess is in communication with the fire transmission groove 805 in the case that the gas distribution cover 40 is provided with a first protrusion 406. The inner groove wall of the first recess is provided with a first groove-shaped passage 2063, and the first groove-shaped passage 2063 is in communication with the fire transmission hole 2061 and the first recess.

[0146] In the embodiment, when the fire transfer groove 805 transfers fire, part of the gas flows upward along the fire transfer groove 805, and the other part of the gas can flow through the first slot-shaped passage 2063. In this way, the stability of the fire transfer of the fire transfer groove 805 can be ensured, and the fire transfer to the fire hole and the stable flame groove can be ensured.

[0147] Alternatively, when the sealing protrusion is in an integrated structure with the inner wall surface of the outer side wall 801 of the fire cap, the fire cap is further provided with a straight-through hole 2064, the straight-through hole 2064 penetrates the sealing protrusion and the outer side wall 801 in sequence, the straight-through hole 2064 communicates the first groove with the outside, and the straight-through hole 2064 corresponds to and communicates with the first slot-shaped passage 2063.

[0148] In the embodiment, after the gas flowing out through the first slot-shaped passage 2063 flows to the straight-through hole 2064, the flame flowing out of the straight-through hole 2064 is the main flame, which can not only ignite the stable flame groove where the fire cap is located, but also transfer the flame to the fire hole of another fire cap adjacent to the fire cap, so as to realize the fire transfer between the fire caps.

[0149] Alternatively, the straight-through hole 2064 is located at the upper portion of the second sealing protrusion 205, and the outer end of the straight-through hole 2064 is located above the stable flame groove and between the two adjacent fire holes. In this way, the straight-through hole 2064 can transfer the flame to the stable flame groove, and then the stable flame groove transfers the flame to the fire hole.

[0150] Alternatively, the upper end of the straight-through hole 2064 communicates with the lower end of the fire transfer groove 805. In this way, part of the gas of the straight-through hole 2064 flows upward through the fire transfer groove 805 and flows out of the stable flame groove, and the other part flows to the fire hole of the adjacent fire cap.

[0151] Alternatively, the straight-through hole 2064 is inclined upward in the direction from inside to outside. The upward inclination of the straight-through hole 2064 makes the gas have a tendency to flow outward, and accelerates the flow speed of the gas flow.

[0152] Alternatively, the angle range of the straight-through hole 2064 with the horizontal direction is 0°-10°. When the angle of the straight-through hole 2064 with the horizontal direction is large, the distance between the stable flame groove below the straight-through hole 2064 is too far, which is not convenient for transferring fire to the fire transfer groove 805. Specifically, the angle of the straight-through hole 2064 with the horizontal direction can be 2°, 5°, 8°, etc.

[0153] Alternatively, the upper end of the first protrusion 406 is provided with a second slot-shaped passage 4096, the second slot-shaped passage 4096 corresponds to and communicates with the first slot-shaped passage 2063, so as to communicate the fire transfer hole 2061 and the straight-through hole 2064.

[0154] In this embodiment, the second slot-shaped channel 4096 and the first slot-shaped channel 2063 jointly form a slot-shaped channel, so that the gas at the ignition hole 2061 can flow to the straight-through hole 2064, thereby improving the ignition performance of the ignition slot 805. The slot-shaped channel cooperates with the accumulation slot 2062, and the gas in the accumulation slot 2062 can more easily reach the straight-through hole 2064 through the slot-shaped channel.

[0155] When the fire cover is three, the outer fire cover 10 is provided with a first sealing protrusion 105, and the middle fire cover 20 is provided with a second sealing protrusion 205. The first sealing protrusion 105 is arranged on the inner groove wall of the first groove 104 of the outer fire cover. The second sealing protrusion 205 is arranged on the outer groove wall of the first groove 204 of the middle fire cover and is integrated with the inner wall surface of the outer side wall 801 of the middle fire cover 20. Optionally, the middle fire cover 20 is provided with a slot-shaped channel and a straight-through hole 2064, and the thickness of the second sealing protrusion 205 is greater than that of the first sealing protrusion 105, so as to realize the radial sealing of the fire cover and the gas distribution cover 40 and improve the sealing performance.

[0156] The outer side wall 801 of the middle fire cover 20 is provided with a straight-through hole 2064 corresponding to the fourth fire hole 102 of the inner side wall 802 of the outer fire cover 10. The straight-through hole 2064 can transmit the flame to the fourth fire hole 102, thereby igniting the four-ring fire.

[0157] As shown in Figure 1 When the burner is ignited, the ignition needle at the inner fire cover 30 ignites, the one-ring fire ignites the two-ring fire, the two-ring fire ignites through the corresponding ignition hole 2061, and part of the gas in the middle ring inner mixing chamber 2042 flows upward along the second ignition slot 206. Part of the gas flows along the ignition hole 2061, the accumulation slot 2062, the slot-shaped channel, and the straight-through hole 2064. The flame at the straight-through hole 2064 is the main flame, wherein part of the gas at the straight-through hole 2064 flows upward from the second flame stabilizing slot 2031 of the middle fire cover 20, the second flame stabilizing slot 2031 transmits the flame to the third fire hole 203, forming the three-ring fire. At the same time, the flame at the outlet of the straight-through hole 2064 ignites the fourth fire hole 102 of the outer fire cover 10, thereby igniting the four-ring fire. The four-ring fire transmits the flame to the fifth fire hole 103 through the first ignition slot 106, thereby igniting the five-ring fire.

[0158] Optionally, as shown in Figure 8As shown, the gas distribution cover 40 is further provided with a gas outlet grid 407, which is located in the gas distribution channel and covers the gas outlet. The gas outlet grid 407 is arc-shaped and extends along the circumference of the gas distribution channel, and the gas outlet is matched with the gas distribution channel. The gas outlet grid 407 is used to guide the gas flowing out of the gas outlet to form a circumferential flow in the corresponding gas mixing chamber before reaching the corresponding gas cap gas mixing chamber, so that the gas flow in the gas mixing chamber is more uniform, and the gas outlet of the corresponding gas cap gas hole is also more uniform.

[0159] Optionally, as shown in Figure 8 and Figure 9 , the circumferential lengths of the gas outlet grids 407 corresponding to the two sides of the gas outlet are different.

[0160] In this embodiment, since the gas distribution channel is annular, the gas needs to flow circumferentially in the gas distribution channel. Due to the structure of the burner, the power of the gas flowing to both sides of the gas outlet is different, so the circumferential lengths of the gas outlet grids 407 corresponding to the two sides of the gas outlet are different, which can improve the uniformity of the circumferential flow of the gas in the gas distribution channel.

[0161] Optionally, the gas outlet grid 407 is provided with a plurality of grid holes 408, which are sequentially and spaced apart along the circumference of the gas outlet grid 407, which can provide the gas outlet uniformity of the gas outlet grid 407. Optionally, the plurality of grid holes 408 are uniformly arranged, which can further improve the gas outlet uniformity of the gas outlet grid 407.

[0162] In the case of three gas caps, the number of injectors 503 is three, wherein each injector 503 extends linearly along the radial direction of the gas distribution assembly; the first injector 5031 and the second injector 5033 are respectively located on both sides of the third injector 5035, and the straight line where the third injector 5035 is located passes through the center of the gas distribution assembly.

[0163] In this embodiment, the third injector 5035 passes through the center of the gas distribution assembly, and the first injector 5031 and the second injector 5033 are respectively located on both sides of the third injector 5035, so that the structure of the injector 503 is compact, and the gas supply to the three gas caps and five gas mixing chambers is facilitated.

[0164] In one specific embodiment, the gas passage comprises an outer ring gas passage, the outer ring gas passage is arc-shaped, the outer ring gas passage is located at one end of the first ejector 5031 and / or the second ejector 5033, and the outer ring gas passage is in communication with the first ejector 5031 and / or the second ejector 5033. The third sub-gas passage 405 is in communication with the outer ring gas passage, the third sub-gas passage 405 is annular, and the gas outlet grid 407 is located in the third sub-gas passage 405. The gas outlet grid 407 comprises a first grid segment 4073 and a second grid segment 4074. One end of the first grid segment 4073 extends away from the side of the center of the gas distribution assembly towards the first ejector 5031 and / or the second ejector 5033, and the other end of the first grid segment 4073 is located at the corresponding gas outlet of the first ejector 5031 and / or the second ejector 5033. One end of the second grid segment 4074 is connected to the other end of the first grid segment 4073, and the other end of the second grid segment 4074 extends towards the side of the center of the gas distribution assembly close to the first ejector 5031 and / or the second ejector 5033. The circumferential length of the second grid segment 4074 is greater than the circumferential length of the first grid segment 4073.

[0165] In this embodiment, the second grid segment 4074 is located on one side of the first ejector 5031 and / or the second ejector 5033, so the second grid segment 4074 is farther away from the corresponding gas outlet, and the circumferential length of the second grid segment 4074 is greater than the circumferential length of the first grid segment, so that the second grid segment 4074 can make the gas flowing out of the gas outlet flow in a circular manner along the circumference of the gas distribution passage.

[0166] Optionally, the number of gas outlet grids 407 is multiple, and the multiple gas outlet grids 407 comprise a first gas outlet grid 4071 and a second gas outlet grid 4072. The first gas outlet grid 4071 is located in the outer ring outer sub-gas passage 4012, and the second gas outlet grid 4072 is located in the outer ring inner sub-gas passage 4013. The first gas outlet grid 4071 is arranged correspondingly to the first ejector 5031, and the second gas outlet grid 4072 is arranged correspondingly to the second ejector 5033.

[0167] In this embodiment, the first sub-gas passage 401 is divided into an inner sub-gas passage and an outer sub-gas passage, and the two gas outlet grids 407 can guide the gas in the two sub-gas passages to flow in a circular manner, thereby improving the uniformity of the gas outlet of the fire cover.

[0168] For example, the first gas outlet grid 4071 and the second gas outlet grid 4072 are both provided with a first grid segment 4073 and a second grid segment 4074, so as to further improve the uniformity of the gas outlet of the first mixing chamber.

[0169] Optionally, the gas passage further comprises a middle ring gas passage, the middle ring gas passage is annular, the third ejector 5035 passes through the middle ring gas passage, wherein the inlet end of the third ejector 5035 is located at the outer side of the middle ring gas passage, the outlet end of the third ejector 5035 is located at the inner side of the middle ring gas passage, the middle ring gas passage is located at the side of the first ejector 5031 and / or the second ejector 5033 facing the third ejector 5035, and the middle ring gas passage intersects and communicates with the first ejector 5031 and / or the second ejector 5033. The center of the second gas distribution passage 402 coincides with the center of the gas distribution assembly, and the second gas distribution passage 402 communicates with the middle ring gas passage.

[0170] In another specific embodiment, the gas outlet grid 407 is located in the second gas distribution passage 402, the gas outlet grid 407 comprises a third grid segment 4077 and a fourth grid segment 4078, the third grid segment 4077 is located at the side of the first ejector 5031 and / or the second ejector 5033 away from the inlet thereof and extends in an arc shape along the circumference of the second gas distribution passage 402; the fourth grid segment 4078 is located at the side of the first ejector 5031 and / or the second ejector 5033 facing the inlet thereof and extends in an arc shape along the circumference of the second gas distribution passage 402; wherein the circumferential length of the third grid segment 4077 is greater than the circumferential length of the fourth grid segment 4078.

[0171] In this embodiment, the extension of the fourth gas outlet grid 4076 in the second gas distribution passage 402 is blocked by the third ejector 5035, and the fourth gas outlet grid 4076 cannot guide the circumferential flow of the gas in the second gas distribution passage 402. The third gas outlet grid 4075 can extend to the third ejector 5035, and the length of the third gas outlet grid 4075 is relatively long, which can ensure that the gas in the second gas distribution passage 402 can realize circumferential flow, thereby ensuring the uniformity of the gas outlet of the valve cover.

[0172] Optionally, the number of gas outlet grids 407 is multiple, and the multiple gas outlet grids 407 comprise a third gas outlet grid 4075 and a fourth gas outlet grid 4076, the third gas outlet grid 4075 is located in the middle ring outer gas distribution passage 4022, and the fourth gas outlet grid 4076 is located in the middle ring inner gas distribution passage 4023; wherein the two ends of the third gas outlet grid 4075 are provided with stepped structures 4079 to avoid the second ejector 5033 and / or the third ejector 5035.

[0173] In this embodiment, the ejector 503 has a certain height, and the stepped structures 4079 at the two ends of the third gas outlet grid 4075 can lift the gas outlet grid 407 to avoid the second ejector 5033 and / or the third ejector 5035, thereby improving the smoothness of the gas flow.

[0174] Optionally, as Figure 9As shown, along the flow direction of the fuel gas in the second gas distribution passage 402, the aperture of the grid holes 408 at the end of the third grid segment 4077 is larger than the aperture of the grid holes 408 at the start and middle ends of the third grid segment 4077, and / or, the aperture of the grid holes 408 at the end of the fourth grid segment 4078 is larger than the aperture of the grid holes 408 at the start and middle ends of the fourth grid segment 4078. In this embodiment, since the gas flow force at the end of the grid segment is small, and the stepped structure 4079 is provided, the aperture of the grid segment at the end is increased, which can further improve the smoothness of the gas flow.

[0175] Optionally, the lower end of the gas distribution cover 40 is provided with a partition matching portion 4041, and the upper end of the gas distribution seat 50 is provided with a partition portion 506 matched with the partition matching portion 4041, and the partition portion 506 is matched with the partition matching portion to separate a gas passage into an inner gas passage and an outer gas passage. Specifically, the inner gas passage is communicated with the inner gas distribution passage corresponding to the gas passage, and the outer gas passage is communicated with the outer gas distribution passage corresponding to the gas passage.

[0176] Specifically, the outer ring gas passage is separated into an outer ring outer gas passage and an outer ring inner gas passage, the outer ring outer gas passage is located outside the outer ring inner gas passage, the outer ring outer gas passage is communicated with the outer ring outer gas distribution passage 4012, and the outer ring inner gas passage is communicated with the outer ring inner gas distribution passage 4013. The middle ring gas passage is separated into a middle ring outer gas passage and a middle ring inner gas passage, the middle ring outer gas passage is located outside the middle ring inner gas passage. The middle ring outer gas passage is communicated with the middle ring outer gas distribution passage 4022, and the middle ring inner gas passage is communicated with the middle ring inner gas distribution passage 4023.

[0177] Optionally, as shown, Figure 9 The middle ring outer gas passage and the middle ring inner gas passage are both located between the first ejector 5031 and the second ejector 5033, and the middle ring outer gas passage intersects with the first ejector 5031, and the middle ring inner gas passage intersects with the second ejector 5033. The upper pipe wall of the first ejector 5031 and / or the second ejector 5033 is provided with a gas outlet hole, so that the fuel gas in the first ejector 5031 flows into the middle ring outer gas distribution passage 4022 through the gas outlet hole, and / or the fuel gas in the second ejector 5033 flows into the middle ring inner gas distribution passage 4023 through the gas outlet hole.

[0178] In the embodiment, the middle ring gas passage intersects with the first and second ejectors 5031 and 5033. In order to ensure that the gas in the ejector pipe can flow smoothly into the second gas distribution passage 402, the upper pipe wall of the first and / or second ejector 5031 and 5033 is provided with a gas outlet hole, so as to facilitate the gas flowing into the second gas distribution passage 402 from the ejector 503. Optionally, the diameter of the gas outlet hole is consistent with the diameter of the grid hole 408 of the grid segment where the gas outlet hole is located, so as to facilitate the uniformity and smoothness of the gas outlet.

[0179] Optionally, the expansion section of the first ejector 5031 intersects with and communicates with the middle ring outer gas distribution passage 4022, and / or the expansion section of the second ejector 5033 intersects with and communicates with the middle ring inner gas distribution passage 4023. The gas outlet hole is arranged in the expansion section of the first ejector 5031, and / or the gas outlet hole is arranged in the expansion section of the second ejector 5033.

[0180] Optionally, the upper surface of the gas distribution seat 50 defines a gas outlet passage, and the lower surface of the gas distribution cover 40 defines a gas outlet matching passage. When the gas distribution cover 40 is arranged above the gas distribution seat 50, the gas outlet passage and the gas outlet matching passage jointly enclose the gas passage.

[0181] Optionally, the gas outlet passage is arc-shaped and extends along the circumference of the gas distribution seat 50. In the flow direction of the gas flow in the gas outlet passage, the bottom wall 507 of the gas outlet passage is at least partially inclined upward.

[0182] In the embodiment, the gas flow in the gas outlet passage needs to flow upward into the gas distribution passage of the gas distribution cover 40. The bottom wall 507 of the gas outlet passage is at least partially inclined upward, which can improve the smoothness of the gas flow.

[0183] Optionally, the number of gas outlet passages is multiple. The multiple gas outlet passages are sequentially sleeved in the direction from the outside to the inside, so as to realize the multi-ring fire outlet form.

[0184] Optionally, as shown in Figure 10 the circumferential length of the gas outlet grid 407 is less than the circumferential length of the gas outlet. In the flow direction of the gas flow in the gas outlet passage, the bottom wall 507 of the gas outlet passage is inclined upward from the end of the gas outlet grid 407.

[0185] In the embodiment, the bottom wall 507 of the gas outlet passage at the end of the gas outlet grid 407 is inclined upward, which can reduce the distance of the gas flow from the end of the gas outlet grid 407 to the fire cover, thereby further improving the smoothness of the gas flow.

[0186] Optionally, along the flow direction of the gas in the gas distribution channel, the bottom wall 4081 of the gas distribution channel includes a second inclined surface 4082, which slopes upwards along the flow direction of the gas in the gas distribution channel; wherein, the starting end of the second inclined surface 4082 corresponds to the ending end of the first inclined surface 5071. In this embodiment, after the gas flows out through the first inclined surface 5071, the second inclined surface 4082 corresponding to the first inclined surface 5071 slopes upwards, which can continue to guide the airflow into the gas distribution channel, thereby further improving the smoothness of the airflow in the gas distribution channel.

[0187] Optionally, the bottom wall 4081 of the gas distribution channel includes a first bottom wall section, which is arc-shaped and extends circumferentially along the gas outlet grille 407; there are two second inclined surfaces 4082, which are respectively connected to the two ends of the first bottom wall section, and the gas outlet is located between the two second inclined surfaces 4082.

[0188] In this embodiment, a gas outlet is defined between the two second inclined surfaces 4082. That is, two second inclined surfaces 4082 are provided at both ends of the gas outlet, and two first inclined surfaces 5071 are provided at the two inclined surfaces respectively. This can improve the smoothness of gas flow and improve the circumferential flow of gas.

[0189] The gas distribution plate can divide a gas distribution channel into an inner gas distribution channel and an outer gas distribution channel. Both the inner and outer gas distribution channels are equipped with gas outlet grilles 407 to ensure that the gas in the inner and outer gas distribution channels of each gas distribution channel can flow circumferentially, so as to ensure the uniformity of gas supply at the burner holes at the inner and outer sides of each burner cap.

[0190] In one specific embodiment, the air outlet channels corresponding to the first air outlet grille 4071 and the second air outlet grille 4072 are both provided with a first inclined surface 5071, and the first air outlet grille 4071 and the second air outlet grille 4072 are also provided with a second inclined surface 4082.

[0191] In this embodiment, when the third gas distribution channel 405 is divided into inner and outer gas distribution channels, each gas distribution channel is provided with an exhaust grille 407, which can improve the smoothness of the gas flow in the outer ring.

[0192] For example, the bottom wall 409 of the outer ring outer gas distribution channel 4012 and the bottom wall 409 of the outer ring inner gas distribution channel 4013 include a second inclined surface 4082. This facilitates the reduction of gas flow resistance corresponding to four-ring and five-ring flames, and improves the smoothness of gas flow.

[0193] Optionally, the partition portion 506 of the air distribution seat 50 is located inside the air outlet channel, dividing the air outlet channel into an inner air outlet channel and an outer air outlet channel. The inner air outlet channel is connected to the inner air distribution channel, and the outer air outlet channel is connected to the outer air distribution channel.

[0194] In the embodiment, the cooperation of each gas outlet channel, gas distribution channel and gas outlet grid 407 can ensure the smoothness of the flow of the gas of each ring flame.

[0195] Alternatively, the gas distribution seat 50 defines a lower ejector channel, and the gas distribution cover 40 defines an upper ejector channel, when the gas distribution cover 40 is covered on the gas distribution seat 50, the lower ejector channel and the upper ejector channel jointly form an ejector 503. In the embodiment, the gas distribution cover 40 and the gas distribution seat 50 are both provided with the ejector channel, so that when the gas distribution cover 40 is covered on the gas distribution seat 50, the upper ejector channel and the lower ejector channel can jointly form the ejector 503.

[0196] Alternatively, the gas distribution seat 50 further comprises a first body 508 and a second body 5081, the first body 508 defines a first lower ejector channel 5032, a second lower ejector channel 5034 and a third lower ejector channel 5036 arranged side by side, the first lower ejector channel 5032 and the second lower ejector channel 5034 are respectively located on both sides of the third lower ejector channel 5036, the second body 5081 is located on one side of the first body 508, and the second body 5081 defines an outer ring gas outlet channel 501, the outlet of the outer ring gas outlet channel 501 is communicated with the inlet of the outer ring mixing chamber, the outer ring gas outlet channel 501 is arc-shaped and extends along the circumference of the gas distribution seat 50. Among them, the gas outlet channel comprises the outer ring gas outlet channel 501. The first body 508 further defines a middle ring gas outlet channel 502, the outlet of the middle ring gas outlet channel 502 is communicated with the middle ring mixing chamber, the middle ring gas outlet channel 502 is arc-shaped, and the middle ring gas outlet channel 502 is located on the inner side of the outer ring gas outlet channel 501.

[0197] In the embodiment, the arc-shaped outer ring gas outlet channel 501 and the middle ring gas outlet channel 502 can be matched with the annular gas distribution cover 40 and the flame cover, so that the gas can flow more uniformly along the circumference.

[0198] The first lower ejector channel 5032, the second lower ejector channel 5034 and the third lower ejector channel 5036 all extend along the radial direction of the gas distribution seat 50 and are linear, which can reduce the flow path of the gas in the ejector 503 and improve the ejecting effect of the gas.

[0199] Alternatively, the gas distribution seat 50 further comprises a first partition 5061, the first partition 5061 is located in the outer ring gas outlet channel 501 and separates the outer ring gas outlet channel 501 into a first gas outlet channel 5011 and a second gas outlet channel 5012, the first gas outlet channel 5011 is located on the outer side of the second gas outlet channel 5012, the first gas outlet channel 5011 is communicated between the first lower ejector channel 5032 and the first mixing chamber, and the second gas outlet channel 5012 is communicated between the second lower ejector channel 5034 and the second mixing chamber.

[0200] In the embodiment, the first partition part 5061 divides the outer ring gas outlet passage 501 into two gas outlet passages, and the two gas outlet passages can provide gas for two gas mixing chambers of the outer ring gas mixing chamber, thereby ensuring the independence, flexibility and reliability of the gas inlet of the first gas mixing chamber and the second gas mixing chamber. Moreover, the two lower injection passages can provide gas for the two gas outlet passages, thereby improving the compactness of the burner structure and increasing the flexibility of the firepower adjustment of the burner.

[0201] Optionally, the gas distribution seat 50 further comprises a second partition part 5062 located in the middle ring gas outlet passage 502 and dividing the middle ring gas outlet passage 502 into a third gas outlet passage 5021 and a fourth gas outlet passage 5022, the third gas outlet passage 5021 is located outside the fourth gas outlet passage 5022, the third gas outlet passage 5021 is connected between the first lower injection passage 5032 and the third gas mixing chamber, and the fourth gas outlet passage 5022 is connected between the second lower injection passage 5034 and the fourth gas mixing chamber.

[0202] In the embodiment, the second partition part 5062 divides the middle ring gas outlet passage 502 into two gas outlet passages, and the two gas outlet passages can provide gas for two gas mixing chambers of the middle ring gas mixing chamber, thereby ensuring the independence, flexibility and reliability of the gas inlet of the first gas mixing chamber and the second gas mixing chamber. Moreover, the two lower injection passages can provide gas for the two gas outlet passages, thereby improving the compactness of the burner structure and increasing the flexibility of the firepower adjustment of the burner.

[0203] Optionally, when the gas distribution cover 40 is arranged above the gas distribution seat 50, the first partition part 5061 abuts against the lower surface of the gas distribution cover 40, so as to avoid the first gas outlet passage 5011 and the second gas outlet passage 5012 from being in gas communication with each other. Similarly, when the gas distribution cover 40 is arranged above the gas distribution seat 50, the second partition part 5062 abuts against the lower surface of the gas distribution cover 40, so as to avoid the third gas outlet passage 5021 and the fourth gas outlet passage 5022 from being in gas communication with each other.

[0204] Optionally, the gas distribution seat 50 comprises a partition plate 504 connected between the inlets of two adjacent lower injection passages, the partition plate 504 and the two adjacent lower injection passages jointly define a secondary air flow channel 5041, and the secondary air flow channel 5041 is in communication with the middle fire cover 20 and the outer fire cover 10.

[0205] In the embodiment, the gas flow rate at the inlet of the lower injection passage is fast, and the surrounding primary air can be injected, which can affect the flow of the surrounding secondary air, resulting in poor secondary air supplement between the outer fire cover 10 and the middle fire cover 20, and high flue gas. Through the arrangement of the partition plate 504, the influence of the primary air on the flow of the secondary air can be reduced, the supply amount of the secondary air can be ensured, and the flue gas can be reduced.

[0206] Optionally, the second body 5081 is arranged outside the first lower injection channel 5032 and the second lower injection channel 5034 and extends in an arc shape along the circumference of the gas distribution seat 50, and the line connecting the two ends of the second body 5081 intersects with the first lower injection channel 5032 and the second lower injection channel 5034; the gas distribution seat 50 comprises a reinforcing rib 505, which is connected between at least one end of the second body 5081 and the inlet of the first lower injection channel 5032 and / or the inlet of the second lower injection channel 5034.

[0207] In the embodiment, the second body 5081 matches the outer ring gas outlet channel 501, which can be understood as that the shape and size of the second body 5081 are the same as or similar to those of the outer ring gas outlet channel 501. In this way, the manufacturing cost of the gas distribution seat 50 can be reduced, and the weight of the burner can be reduced. The arrangement of the reinforcing rib 505 can fix the two ends of the second body 5081 and increase the structural strength of the gas distribution seat 50 as a whole, so as to ensure the stable use of the burner.

[0208] When the number of fire covers is three, the lower end surface of the gas distribution seat 50 defines the first upper injection channel 4093, the second upper injection channel 4094 and the third upper injection channel 4095, wherein the first upper injection channel 4093 and the first lower injection channel 5032 jointly enclose the first ejector 5031; the second upper injection channel 4094 and the second lower injection channel 5034 jointly enclose the second ejector 5033; and the third upper injection channel 4095 and the third lower injection channel 5036 jointly enclose the third ejector 5035.

[0209] Optionally, the inner fire cover 30 is further provided with an upper flame stabilizing groove and a lower flame stabilizing groove, the upper flame stabilizing groove is located above the first fire hole 301, and the lower flame stabilizing groove is located above the first fire hole 301. The upper flame stabilizing groove and the lower flame stabilizing groove are arranged alternately, and the projections of the upper flame stabilizing groove and the lower flame stabilizing groove in the height direction can partially overlap and form a circumference, so that the gas outlet of the upper flame stabilizing groove and the lower flame stabilizing groove can cover the entire circumference of the first fire hole 301, preventing the flame from being separated from the flame.

[0210] Optionally, the distance between the upper flame stabilizing groove and the first fire hole 301 is 1mm-2mm. The distance between the lower flame stabilizing groove and the first fire hole 301 is 1mm-2mm.

[0211] The embodiments of the present disclosure also provide a gas stove, which comprises the upper air inlet burner of any one of the above.

[0212] The gas stove provided by the embodiments of the present disclosure has the beneficial effects of the upper air inlet burner of any one of the above, and details are not repeated here.

[0213] The above description and drawings suffice to fully enable one skilled in the art to practice the embodiments of the present disclosure. Other embodiments can include structural and other changes. The embodiments are merely representative of possible variations. Individual components and functions are optional unless explicitly required, and the order of operations can be varied. Portions and features of some embodiments can be included in, or substituted for, portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the drawings, and can be varied in a variety of ways. The scope of the present disclosure is limited only by the claims that follow.

Claims

1. A top air fired burner mounted to a panel, characterized by, The upper air inlet burner comprises a plurality of fire covers and an ejector, the fire covers define a mixing chamber, and the plurality of fire covers comprise: an inner fire cover defining a first mixing chamber and having a first fire hole communicating with the first mixing chamber; a middle fire cover sleeved outside the inner fire cover, defining a second mixing chamber, and having a second fire hole and a third fire hole communicating with the second mixing chamber, the second fire hole being located inside the third fire hole; an outer fire cover sleeved outside the middle fire cover, defining a third mixing chamber, and having a fourth fire hole and a fifth fire hole communicating with the third mixing chamber, the fourth fire hole being located inside the fifth fire hole; wherein the ejector is adapted to be arranged above the panel, and the outlet of the ejector communicates with the mixing chamber for providing fuel gas to the mixing chamber; further comprising a gas distribution seat and a gas distribution cover, the gas distribution seat defines a lower ejector passage, and the gas distribution cover defines an upper ejector passage, when the gas distribution cover is arranged above the gas distribution seat, the lower ejector passage and the upper ejector passage jointly form the ejector; the third mixing chamber and a third gas distribution passage communicate with each other and jointly form an outer ring mixing chamber, the outer ring mixing chamber comprises a first mixing chamber and a second mixing chamber; the gas distribution seat comprises: a first body defining a first lower ejector passage, a second lower ejector passage and a third lower ejector passage arranged side by side; a second body located on one side of the first body, the second body defining an outer ring gas outlet passage, the outlet of the outer ring gas outlet passage communicating with the inlet of the outer ring mixing chamber; a first partitioning portion located in the outer ring gas outlet passage, separating the outer ring gas outlet passage into a first gas outlet passage and a second gas outlet passage, the first gas outlet passage communicating between the first lower ejector passage and the first mixing chamber, and the second gas outlet passage communicating between the second lower ejector passage and the second mixing chamber.

2. The upper air inlet burner according to claim 1, wherein: the number of the ejectors is the same as the number of the fire covers.

3. The upper air inlet burner according to claim 2, wherein: the gas distribution cover defines a gas distribution passage, the fire covers are arranged above the gas distribution passage, the number of the gas distribution passages is the same as and corresponds to the number of the fire covers; the gas distribution seat is located below the gas distribution cover, and the gas distribution seat and the gas distribution cover jointly enclose the ejector; wherein the gas distribution passages communicate between the mixing chamber and the outlet of the ejector.

4. The upper air inlet burner according to claim 3, wherein: the gas distribution passages comprise a first gas distribution passage, a second gas distribution passage and the third gas distribution passage arranged in sequence from inside to outside; the upper air inlet burner further comprises: a first gas distribution plate located in the outer ring mixing chamber, extending along the circumference of the outer ring mixing chamber, and separating the outer ring mixing chamber into the first mixing chamber and the second mixing chamber, the first mixing chamber being located outside the second mixing chamber, the first mixing chamber communicating with the fifth fire hole, and the second mixing chamber communicating with the fourth fire hole; The multiple ejectors include a first ejector and a second ejector, an outlet of the first ejector is communicated with the first gas mixing cavity, and an outlet of the second ejector is communicated with the second gas mixing cavity.

5. The updraft burner according to claim 4, wherein, the second gas mixing chamber is communicated with the second gas distribution channel and forms a middle ring gas mixing cavity together with the second gas distribution channel; the updraft burner further comprises: a second gas distribution plate located in the middle ring gas mixing cavity, extending along the circumference of the middle ring gas mixing cavity, and separating the middle ring gas mixing cavity into a third gas mixing cavity and a fourth gas mixing cavity, the third gas mixing cavity being located outside the fourth gas mixing cavity, the third fire hole being communicated with the third gas mixing cavity, and the second fire hole being communicated with the fourth gas mixing cavity; wherein the outlet of the first ejector is communicated with the third gas mixing cavity, and the outlet of the second ejector is communicated with the fourth gas mixing cavity.

6. The updraft burner according to claim 5, wherein, the first lower ejecting channel, the second lower ejecting channel and the third lower ejecting channel all extend linearly along the radial direction of the gas distribution seat, wherein the first lower ejecting channel and the second lower ejecting channel are respectively located on the two sides of the third lower ejecting channel; and the outer ring gas outlet channel is arc-shaped and extends along the circumference of the gas distribution seat; the first gas outlet channel is located outside the second gas outlet channel.

7. The updraft burner according to claim 6, wherein, the first body further defines a middle ring gas outlet channel, an outlet of the middle ring gas outlet channel is communicated with an inlet of the middle ring gas mixing cavity, and the middle ring gas outlet channel is located inside the outer ring gas outlet channel; the gas distribution seat further comprises: a second partitioning portion located in the middle ring gas outlet channel, separating the middle ring gas outlet channel into a third gas outlet channel and a fourth gas outlet channel, the third gas outlet channel being located outside the fourth gas outlet channel, the third gas outlet channel being communicated between the first lower ejecting channel and the third gas mixing cavity, and the fourth gas outlet channel being communicated between the second lower ejecting channel and the fourth gas mixing cavity.

8. The updraft burner according to claim 6, wherein, the gas distribution seat further comprises: a partition plate connected between the inlets of two adjacent lower ejecting channels, the partition plate and the two adjacent lower ejecting channels together enclosing a secondary air flow channel, the secondary air flow channel being used to provide secondary air to the middle fire cover and the outer fire cover.

9. The updraft burner according to claim 6, wherein, the second body is arranged outside the first lower ejecting channel and the second lower ejecting channel and extends arcuately along the circumference of the gas distribution seat, and the line connecting the two ends of the second body intersects with the first lower ejecting channel and the second lower ejecting channel; the gas distribution seat comprises: a reinforcing rib connected between at least one end of the second body and the inlet of the first lower ejecting channel and / or the inlet of the second lower ejecting channel.

10. The top air inlet burner according to claim 3, characterized in that, the air distribution cover and the air distribution seat are detachably connected or fixedly connected.

11. The updraft burner according to any one of claims 3 to 10, characterized in that Further comprising: a base located below the ejector, the base defining air bleed channels, the air bleed channels being in communication with the inlets of the ejectors, the number of the air bleed channels being the same as and corresponding to the number of the ejectors; a valve body in communication with the inlets of the air bleed channels for adjusting the air intake of each air bleed channel.

12. The updraft burner according to claim 11, characterized in that Further comprising: a liquid receiving tray between the air distribution seat and the base, a gap being present between the air distribution seat and the liquid receiving tray to facilitate air flow; wherein the liquid receiving tray is provided with a clearance hole, and the upper ends of the air bleed channels are in communication with the ejectors through the clearance hole.

13. A gas hob, characterized in that The top air inlet burner according to any one of claims 1 to 12.

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