Upward air inlet burner and gas stove

Abstract

The present invention provides an upper air inlet burner and a gas stove, which relate to the technical field of gas stoves. The upper air inlet burner includes a burner body and an outer fire cover. The burner body includes an outer ring and a middle ring, a burner baffle is provided between the outer ring and the middle ring, and a channel for connecting the outer premixed gas chamber and the middle premixed gas chamber is provided between the outer ring and the middle premixed gas chamber. The burner baffle is provided with a first outer ring outlet and a second outer ring outlet, the first outer ring outlet connects the outer premixed gas chamber with the outer ring fire ejector tube, and the second outer ring outlet connects the outer premixed gas chamber with the middle ring fire ejector tube. The outer fire cover includes an outer mixed gas chamber and a middle mixed gas chamber that are separated and buckled onto the burner body. The gas stove includes an upper air inlet burner. This alleviates the technical problem in the prior art that the outlet pressure of the outer and middle ring fire holes of the same outer fire cover is uneven, which easily leads to flame separation and flashback. The technical effect of achieving a consistent airflow pressure field in the distribution cavity and uniform airflow flow at each fire hole of the outer fire cover, thus avoiding flame separation and flashback, is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of gas stoves, and in particular to a top air inlet burner and a gas stove. Background Art

[0002] Most stoves on the market use built-in atmospheric burners, which offer advantages such as high heat load and powerful firepower. However, due to limited cabinet space, insufficient primary air supply in built-in atmospheric burners can lead to incomplete combustion and yellow flames. Currently, there is increasing focus on top-inlet burners to optimize primary air supply.

[0003] In order to ensure sufficient heat load, two fire holes, an outer ring and a middle ring, are generally set on the same outer fire cover. However, since the required outlet pressures of the outer ring and the middle ring are inconsistent, but in fact the cavity pressures of the two are the same, it is easy to cause unstable flame combustion, resulting in flame separation, backfire and other phenomena. Summary of the Invention

[0004] The object of the present invention is to provide a top air inlet burner and a gas stove to alleviate the technical problem in the prior art that the outlet pressure of the outer and middle ring fire holes of the same outer fire cover is uneven, which easily leads to flame separation and flashback.

[0005] In a first aspect, the present invention provides a top-inlet burner, comprising: a burner body and an outer fire cover;

[0006] The burner body comprises at least an outer ring and a middle ring, a burner baffle is provided between the outer ring and the middle ring, the burner baffle divides the area between the outer ring and the middle ring into an outer premixed gas cavity and a middle premixed gas cavity, a passage is provided between the outer premixed gas cavity and the middle premixed gas cavity for connecting the two, wherein the space of the outer premixed gas cavity is larger than the space of the middle premixed gas cavity;

[0007] The burner baffle is provided with a first outer ring outlet and a second outer ring outlet, the first outer ring outlet is connected to the outer premixed gas cavity and the outer ring fire ejector pipe, and the second outer ring outlet is connected to the outer premixed gas cavity and the middle ring fire ejector pipe;

[0008] The outer fire cover includes an outer gas mixing chamber and a middle gas mixing chamber that are separated from each other. The outer fire cover is buckled on the burner body so that the outer gas mixing chamber is connected to the outer premixed gas chamber, and the middle gas mixing chamber is connected to the middle premixed gas chamber.

[0009] Furthermore, a fire cover partition is provided inside the outer fire cover, and the fire cover partition divides the inner space of the outer fire cover into the outer mixing chamber and the middle mixing chamber;

[0010] The channel is a vertical gap provided between the burner partition and the fire cover partition.

[0011] Furthermore, the channels are arranged in multiple groups, and the multiple groups of channels are arranged at intervals along the circumference of the furnace head partition.

[0012] Furthermore, a concave platform is provided at the top of the furnace head partition, and a convex platform is formed between two adjacent groups of the concave platforms;

[0013] The bottom surface of the fire cover partition is in close contact with the top surface of the convex platform, and the vertical gap is formed between the bottom surface of the fire cover partition and the concave platform.

[0014] Furthermore, the channel is opened on the furnace head partition.

[0015] Furthermore, the area of the channel is set according to the power of the central ring.

[0016] Furthermore, the outer ring fire ejector tube and the middle ring fire ejector tube are both extended in the horizontal direction.

[0017] Furthermore, the outer ring fire ejector tube and the middle ring fire ejector tube are arranged opposite to or in the same direction.

[0018] Furthermore, the upper air inlet burner further includes an inner fire cover; the burner head further includes an inner ring, the inner ring is located on the inner circumference of the middle ring, and the inner fire cover is buckled on the inner ring;

[0019] The outer ring fire ejector pipe and the middle ring fire ejector pipe are arranged on both sides of the inner circle, and an air passage is formed between the two.

[0020] Beneficial effects:

[0021] The upper air inlet burner provided by the present invention has, on the one hand, a first outer ring outlet connecting the outer premixing air chamber and the outer ring fire ejector pipe, so that the gas of the outer ring fire ejector pipe can enter the outer premixing air chamber from the outer ring fire ejector pipe through the first outer ring outlet for premixing; on the other hand, a second outer ring outlet connecting the outer premixing air chamber and the middle ring fire ejector pipe, so that the gas of the middle ring fire ejector pipe can enter the outer premixing air chamber from the middle ring fire ejector pipe through the second outer ring outlet for premixing; furthermore, since a passage for connecting the outer premixing air chamber and the middle premixing air chamber is provided between the outer premixing air chamber and the middle premixing air chamber, part of the gas in the outer premixing air chamber can enter the middle premixing air chamber. At the same time, since the outer mixing chamber is connected to the outer premixing air chamber and the middle mixing chamber is connected to the middle premixing air chamber, the premixed gas in the outer premixing air chamber can enter the outer mixing chamber for full mixing, and at the same time, the premixed gas in the middle premixing air chamber can enter the middle mixing chamber for full mixing.

[0022] It can be seen that the gases from the outer ring fire ejector tube and the middle ring fire ejector tube first enter the outer premixed gas chamber for mixing. Since the space of the outer premixed gas chamber is larger than that of the middle premixed gas chamber, it can ensure that the gas is premixed evenly and the pressure is stable. A small amount of premixed gas then enters the middle premixed gas chamber through the channel. A small amount of premixed gas can ensure the gas supply and pressure stability of the middle ring, thereby achieving the pressure required by the middle premixed gas chamber and the outer premixed gas chamber respectively, and achieving the stability of the combustion of the middle ring fire and the outer ring fire, thereby avoiding the occurrence of flame separation or backfire.

[0023] In a second aspect, the present invention provides a gas stove comprising: the upper air inlet burner as described in any one of the aforementioned embodiments.

[0024] Beneficial effects:

[0025] The gas stove provided by the present invention includes an upper air inlet burner. Therefore, the technical advantages and effects that can be achieved by the gas stove also include the technical advantages and effects that can be achieved by the upper air inlet burner, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 A schematic structural diagram of an upper air inlet burner provided in an embodiment of the present invention;

[0028] Figure 2 A top view of an upper air inlet burner provided in an embodiment of the present invention;

[0029] Figure 3 A transverse cross-sectional view of an upper air inlet burner provided in an embodiment of the present invention;

[0030] Figure 4 A schematic diagram of a portion of the structure of an upper air inlet burner provided in an embodiment of the present invention;

[0031] Figure 5 for Figure 3 Sectional view along line AA;

[0032] Figure 6 for Figure 3 Cross-sectional view along line BB;

[0033] Figure 7 This is a partial structural diagram of the furnace head.

[0034] icon:

[0035] 100-burner body; 110-outer ring; 120-middle ring; 130-burner baffle; 140-outer premixed gas chamber; 150-middle premixed gas chamber; 160-channel; 170-outer ring fire ejector; 180-middle ring fire ejector; 190-inner ring;

[0036] 131 - first outer ring outlet; 132 - second outer ring outlet; 133 - concave platform; 134 - convex platform;

[0037] 200-external fire cover; 210-external gas mixing chamber; 220-intermediate gas mixing chamber; 230-fire cover partition;

[0038] 300-Inner fire cover;

[0039] 400-Air channel. DETAILED DESCRIPTION

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0042] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0043] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like indicate positions or locations based on the positions shown in the accompanying drawings, or the positions or locations in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0044] In addition, terms such as "horizontal" and "vertical" do not mean that the components must be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", not that the structure must be completely horizontal, but can be slightly tilted.

[0045] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0046] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0047] Reference Figures 1 to 7 The present embodiment provides an upper air inlet burner, which includes a burner body 100 and an outer fire cover 200; the burner body 100 includes at least an outer ring 110 and a middle ring 120, a burner baffle 130 is provided between the outer ring 110 and the middle ring 120, and the burner baffle 130 divides the area between the outer ring 110 and the middle ring 120 into an outer premixed gas chamber 140 and a middle premixed gas chamber 150, and a channel 160 is provided between the outer premixed gas chamber 140 and the middle premixed gas chamber 150 for connecting the two, wherein the space of the outer premixed gas chamber 140 is large. In the space of the middle premixed gas chamber 150; the burner partition 130 is provided with a first outer ring outlet 131 and a second outer ring outlet 132, the first outer ring outlet 131 connects the outer premixed gas chamber 140 with the outer ring fire ejector pipe 170, and the second outer ring outlet 132 connects the outer premixed gas chamber 140 with the middle ring fire ejector pipe 180; the outer fire cover 200 includes an outer mixed gas chamber 210 and a middle mixed gas chamber 220 which are separated from each other, and the outer fire cover 200 is buckled on the burner body 100 to connect the outer mixed gas chamber 210 with the outer premixed gas chamber 140, and the middle mixed gas chamber 220 with the middle premixed gas chamber 150.

[0048] The upper air inlet burner provided in this embodiment, on the one hand, the first outer ring outlet 131 connects the outer premixed air chamber 140 with the outer ring fire ejector pipe 170, so that the gas in the outer ring fire ejector pipe 170 can pass from the outer ring fire ejector pipe 170 through the first outer ring outlet 131 and enter the outer premixed air chamber 140 for premixing; on the other hand, the second outer ring outlet 132 connects the outer premixed air chamber 140 with the middle ring fire ejector pipe 180, so that the gas in the middle ring fire ejector pipe 180 can pass from the middle ring fire ejector pipe 180 through the second outer ring outlet 132 and enter the outer premixed air chamber 140 for premixing; furthermore, since a channel 160 for connecting the outer premixed air chamber 140 and the middle premixed air chamber 150 is provided between the outer premixed air chamber 140 and the middle premixed air chamber 150, part of the gas in the outer premixed air chamber 140 can enter the middle premixed air chamber 150. At the same time, since the outer mixing chamber 210 is connected to the outer premixing chamber 140 and the middle mixing chamber 220 is connected to the middle premixing chamber 150, the premixed gas in the outer premixing chamber 140 can enter the outer mixing chamber 210 for full mixing, and at the same time, the premixed gas in the middle premixing chamber 150 can enter the middle mixing chamber 220 for full mixing.

[0049] It can be seen that the gases from the outer ring fire ejector tube 170 and the middle ring fire ejector tube 180 first enter the outer premixing gas chamber 140 for mixing. Since the space of the outer premixing gas chamber 140 is larger than the space of the middle premixing gas chamber 150, it can ensure that the gas is premixed evenly and the pressure is stable. A small amount of premixed gas then enters the middle premixing gas chamber 150 through the channel 160. A small amount of premixed gas can ensure the gas supply and pressure stability of the middle ring, thereby achieving the pressures required by the outer premixing gas chamber 140 and the middle premixing gas chamber 150 respectively, and achieving the stability of the combustion of the middle ring fire and the outer ring fire, thereby avoiding the phenomenon of flame separation or backfire.

[0050] In one embodiment of the present application, referring to Figure 6 A fire cover partition 230 is provided inside the outer fire cover 200, and the fire cover partition 230 divides the internal space of the outer fire cover 200 into an outer mixing gas chamber 210 and a middle mixing gas chamber 220; wherein, the channel 160 is a vertical gap provided between the burner baffle 130 and the fire cover baffle 230. With such a setting, it is only necessary to appropriately adjust the vertical gap between the burner baffle 130 and the fire cover baffle 230 to realize the flow of gas from the outer premixed gas chamber 140 to the middle premixed gas chamber 150; in addition, the channel 160 of this structure does not require any major changes to the structure of the burner body 100 and the outer fire cover 200.

[0051] Furthermore, the channels 160 are arranged in multiple groups, and the multiple groups of channels 160 are arranged at circumferential intervals along the burner partition 130, so as to ensure that the gas flows from multiple directions to the middle premixed gas cavity 150 to meet the gas supply of the middle premixed gas cavity 150, while shortening the time to supply the required amount of gas.

[0052] In this embodiment, the channels 160 can be arranged into four groups, and the four groups of channels 160 are evenly arranged. Of course, the number of channels 160 can be appropriately increased or decreased according to the area of the channels 160.

[0053] Reference Figure 7 A concave platform 133 is provided at the top of the burner partition 130, and a convex platform 134 is formed between two adjacent groups of concave platforms 133; the bottom surface of the fire cover partition 230 is tightly abutted against the top surface of the convex platform 134, and a vertical gap, namely a channel 160, is formed between the bottom surface of the fire cover partition 230 and the concave platform 133.

[0054] In another embodiment of the present application, the channel 160 may be directly opened in the furnace top partition 130 (not shown in the drawings).

[0055] Based on the above embodiment, the area of the channel 160 is set according to the size of the middle ring power. Simply put, when the required middle ring power is large, the area of the channel 160 is appropriately increased, that is, the depth of the concave platform 133 can be appropriately reduced; if the required middle ring power is large, the area of the channel 160 is appropriately reduced, that is, the depth of the concave platform 133 can be appropriately increased.

[0056] In this embodiment, refer to Figure 2 and Figure 3 The outer ring fire ejector tube 170 extends horizontally at the entrance of the outer premixed gas chamber 140, while the middle ring fire ejector tube 180 extends horizontally at the entrance of the middle premixed gas chamber 150. This arrangement increases the extension lengths of the outer ring fire ejector tubes 170 and the middle ring fire ejector tubes 180, reducing the flow rate of the gas-air mixture and promoting sufficient mixing of the gas and air, thereby improving ejection capacity and achieving complete combustion.

[0057] The outer ring fire ejector pipe 170 and the middle ring fire ejector pipe 180 are arranged opposite to each other, that is, the gases in the two pipes flow in opposite directions.

[0058] Alternatively, the outer ring fire ejector pipe 170 and the middle ring fire ejector pipe 180 are arranged in the same direction, that is, the gases in the two pipes flow in the same direction.

[0059] Reference Figure 1 The upper air inlet burner also includes an inner fire cover 300; the burner head also includes an inner ring 190, the inner ring 190 is located on the inner circumference of the middle ring 120, and the inner fire cover 300 is buckled onto the inner ring 190; the outer ring fire ejector pipe 170 and the middle ring fire ejector pipe 180 are arranged on both sides of the inner ring 190, and an air channel 400 is formed between the two.

[0060] Specifically, air can flow from the bottom of the burner body 100 through the air channel 400 to the outer fire cover 200 and around the copper core, providing secondary air for the combustion of gas on the outer fire cover 200.

[0061] This embodiment further provides a gas stove, comprising the upper air intake burner of the aforementioned embodiment. The gas stove comprises the upper air intake burner of the aforementioned embodiment. The gas stove provided in this embodiment includes the upper air intake burner. Therefore, the technical advantages and effects achieved by this gas stove also include those achieved by the upper air intake burner, and will not be further elaborated here.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An upward air inlet burner, characterized in that: include: Burner body (100) and outer fire cover (200); The burner body (100) comprises at least an outer ring (110) and a middle ring (120); a burner baffle (130) is provided between the outer ring (110) and the middle ring (120); the burner baffle (130) divides the area between the outer ring (110) and the middle ring (120) into an outer premixed gas cavity (140) and a middle premixed gas cavity (150); a passage (160) is provided between the outer premixed gas cavity (140) and the middle premixed gas cavity (150) for connecting the two; wherein the space of the outer premixed gas cavity (140) is larger than the space of the middle premixed gas cavity (150); The burner baffle (130) is provided with a first outer ring outlet (131) and a second outer ring outlet (132), wherein the first outer ring outlet (131) is connected to the outer premixed gas cavity (140) and the outer ring fire ejector pipe (170), and the second outer ring outlet (132) is connected to the outer premixed gas cavity (140) and the middle ring fire ejector pipe (180); The outer fire cover (200) comprises an outer gas mixing chamber (210) and a middle gas mixing chamber (220) which are separated from each other, and the outer fire cover (200) is buckled onto the burner body (100) so that the outer gas mixing chamber (210) is in communication with the outer premixing chamber (140), and the middle gas mixing chamber (220) is in communication with the middle premixing chamber (150); The channel (160) is opened on the furnace head partition (130); A fire cover partition (230) is provided inside the outer fire cover (200), and the fire cover partition (230) divides the inner space of the outer fire cover (200) into the outer mixing chamber (210) and the middle mixing chamber (220); The channel (160) is a vertical gap provided between the burner baffle (130) and the fire cover baffle (230).

2. The upward air inlet burner according to claim 1, characterized in that: The channels (160) are arranged in multiple groups, and the multiple groups of channels (160) are arranged at intervals along the circumference of the furnace head partition (130).

3. The upward air inlet burner according to claim 2, characterized in that: A concave platform (133) is provided at the top end of the furnace head partition (130), and a convex platform (134) is formed between two adjacent groups of the concave platforms (133); The bottom surface of the fire cover partition (230) is in close contact with the top surface of the convex platform (134), and a vertical gap is formed between the bottom surface of the fire cover partition (230) and the concave platform (133).

4. The upward air inlet burner according to any one of claims 1 to 3, characterized in that: The area of the channel (160) is set according to the power of the middle ring.

5. The upward air inlet burner according to any one of claims 1 to 3, characterized in that: The outer ring fire ejector tube (170) and the middle ring fire ejector tube (180) are both extended in the horizontal direction.

6. The upward air inlet burner according to claim 5, characterized in that: The outer ring fire ejector tube (170) and the middle ring fire ejector tube (180) are arranged in opposite directions or in the same direction.

7. The upward air inlet burner according to claim 6, characterized in that: The upper air inlet burner further includes an inner fire cover (300); The burner head further comprises an inner ring (190), the inner ring (190) being located on the inner circumference of the middle ring (120), and the inner fire cover (300) being buckled onto the inner ring (190); The outer ring fire ejector tube (170) and the middle ring fire ejector tube (180) are arranged on both sides of the inner ring (190), and an air passage (400) is formed between the two.

8. A gas stove, characterized in that: include: The upward air inlet burner according to any one of claims 1 to 7.

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