Combustor with ejector mixing system and gas stove

Abstract

The application provides a burner with an injection mixing system and a gas stove, and relates to the technical field of gas stoves. The burner with the injection mixing system comprises a burner head and an outer ring fire cover. The burner head comprises at least an outer ring and a middle ring, and a burner head surrounding partition is arranged between the outer ring and the middle ring. The burner head surrounding partition is provided with a partition first outer ring gas outlet and a partition second outer ring gas outlet. A middle ring injection pipe is provided with a first middle ring gas outlet. The outer ring fire cover comprises an outer ring mixing cavity and a middle ring mixing cavity, and the outer ring fire cover is buckled on the burner head, so that the outer ring mixing cavity is communicated with the outer ring premixing cavity and the middle ring mixing cavity is communicated with the middle ring premixing cavity. The gas stove comprises the burner with the injection mixing system. The technical problem that the gas pressure of the outer ring and the middle ring fire hole of the existing technology is not uniform, which easily leads to flame separation and backfire is solved, the gas flow pressure field in the distribution gas channel is consistent, the gas flow of each fire hole of the outer ring fire cover is uniform, and the technical effect of avoiding flame separation and backfire is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas stoves, in particular to a burner with an injection mixing system and a gas stove. BACKGROUND

[0002] At present, the existing stoves on the market are mostly embedded large-air-type burners, and many three-ring fire burners are applied to household gas stoves. Among them, the three-ring fire burner refers to supplying the inner ring fire by the inner ring nozzle, supplying the middle ring fire by the middle ring nozzle, and supplying the outer ring fire by the outer ring nozzle.

[0003] In order to ensure sufficient injection capacity, generally, the burner is provided with at least two injection pipes to improve the heat load. In the outer ring injection, in order to ensure sufficient heat load, the same fire cover is generally provided with outward and inward two parts of fire holes, but due to the inconsistent area of the outer ring and the middle ring fire holes, but they are all in the outer ring injection mixing cavity, so it is easy to cause unstable flame burning, and the phenomena of flame separation and backfire occur. SUMMARY

[0004] The purpose of the present application is to provide a burner with an injection mixing system and a gas stove to alleviate the technical problems of uneven gas pressure of the outer and middle ring fire holes of the same fire cover in the prior art, which easily leads to flame separation and backfire.

[0005] In a first aspect, the present application provides a burner with an injection mixing system, comprising: a burner head and an outer ring fire cover;

[0006] The burner head comprises at least an outer ring and a middle ring, and a burner head enclosure partition plate is arranged between the outer ring and the middle ring, which separates the space between the outer ring and the middle ring into an outer ring premixing cavity and a middle ring premixing cavity, wherein the outer ring injection pipe is arranged at the gas inlet end of the outer ring premixing cavity, and the middle ring injection pipe is arranged at the gas inlet end of the middle ring premixing cavity;

[0007] The burner head enclosure partition plate is provided with a partition plate first outer ring gas outlet communicating the outer ring premixing cavity with the outer ring injection pipe and a partition plate second outer ring gas outlet communicating the outer ring premixing cavity with the middle ring injection pipe; the middle ring injection pipe is provided with a first middle ring gas outlet communicating the middle ring premixing cavity;

[0008] The outer ring fire cover comprises an outer ring mixing cavity and a middle ring mixing cavity arranged separately, and the outer ring fire cover is buckled on the burner head, so that the outer ring mixing cavity communicates with the outer ring premixing cavity, and the middle ring mixing cavity communicates with the middle ring premixing cavity.

[0009] Further, the outer ring injection pipe is arranged in the horizontal direction, and the outer ring injection inlet is located at the bottom of the outer ring;

[0010] The middle ring ejection pipe is arranged in a horizontal direction, and the middle ring ejection inlet is located at the bottom of the middle ring.

[0011] Further, the outer ring ejection outlet of the outer ring ejection pipe is tangent to the bottom surface of the furnace head enclosure partition plate.

[0012] And / or, the middle ring ejection outlet of the middle ring ejection pipe is parallel to the bottom surface of the furnace head enclosure partition plate.

[0013] Further, the second outer ring gas outlet of the partition plate is arranged on the tangent surface of the furnace head enclosure partition plate and the middle ring ejection outlet, and is arranged as a circular outlet.

[0014] Further, the outer ring ejection pipe is provided with a second middle ring gas outlet communicating with the middle ring premixing cavity.

[0015] The sum of the areas of the first middle ring gas outlet and the second middle ring gas outlet and the sum of the areas of the first outer ring gas outlet of the partition plate and the second outer ring gas outlet of the partition plate are set according to the power ratio of the outer ring and the middle ring.

[0016] Further, the outer ring ejection pipe and the middle ring ejection pipe are arranged in parallel and opposite directions or in parallel and same directions.

[0017] Further, the inner part of the outer ring fire cover is provided with a fire cover enclosure partition plate, which separates the inner part of the outer ring fire cover into the outer ring mixing cavity and the middle ring mixing cavity.

[0018] The opposite surfaces of the fire cover enclosure partition plate and the furnace head enclosure partition plate are sealingly connected in the assembled state.

[0019] Further, it further comprises an inner ring fire cover.

[0020] The furnace head further comprises an inner ring located on the inner circumferential side of the middle ring.

[0021] The inner ring fire cover is buckled to the inner ring.

[0022] Further, the outer ring ejection pipe and the middle ring ejection pipe are arranged on both sides of the inner ring, and a gap is left between them for forming an air passage.

[0023] Advantages:

[0024] The burner with the ejection mixing system provided by the application comprises a burner head, a burner head surrounding ring, a burner head surrounding ring partition plate, an outer ring ejection pipe, an outer ring premixing cavity, an outer ring mixing cavity, an outer ring fire cover, a middle ring ejection pipe, a middle ring premixing cavity, a middle ring mixing cavity, a middle ring fire cover, an outer ring ejection pipe first outer ring gas outlet, an outer ring ejection pipe second outer ring gas outlet, an outer ring ejection pipe first outer ring gas outlet, an outer ring ejection pipe second outer ring gas outlet, and a middle ring ejection pipe first middle ring gas outlet.

[0025] It can be seen that the burner with the ejection mixing system can distribute all the gas supplied by the outer ring ejection pipe to the outer ring mixing cavity for forming the outer ring fire, and can distribute the gas supplied by the middle ring ejection pipe to the middle ring premixing cavity and the middle ring mixing cavity through the first middle ring gas outlet for forming the middle ring fire, and can distribute the other part of the gas supplied by the middle ring ejection pipe to the outer ring premixing cavity and the outer ring mixing cavity through the second outer ring gas outlet for forming the outer ring fire. By controlling the gas flow of the outer ring and the middle ring, the consistency of the gas flow pressure field in the distribution cavity can be ensured, the gas flow of each fire hole (mainly the outer ring fire hole and the middle ring fire hole) on the outer ring fire cover can be uniform, the uniform and stable combustion condition can be realized, and the off-flame and backfire can be avoided.

[0026] In the second aspect, the application provides a gas stove, which comprises the burner with the ejection mixing system.

[0027] Advantages:

[0028] The gas stove provided by the application comprises the burner with the ejection mixing system, and 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 burner with the ejection mixing system, which will not be described herein again. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the specific embodiments of the application or the technical solutions in the prior art, the drawings needed in the following description of the specific embodiments or the prior art will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0030] Figure 1 This is a schematic diagram of the structure of a burner with an ejector mixing system provided in Embodiment 1 of the present invention;

[0031] Figure 2 This is a top view of a burner with an ejector mixing system provided in Embodiment 1 of the present invention;

[0032] Figure 3 This is a cross-sectional view of a burner with an ejector mixing system provided in Embodiment 1 of the present invention;

[0033] Figure 4 for Figure 3 A sectional view along line AA.

[0034] Figure 5 for Figure 3 Sectional view along the BB line;

[0035] Figure 6 This is a partial structural schematic diagram of a burner with an ejector mixing system provided in Embodiment 1 of the present invention;

[0036] Figure 7 This is a longitudinal sectional view of a burner with an ejector mixing system provided in Embodiment 2 of the present invention;

[0037] Figure 8 This is a partial structural schematic diagram of a burner with an ejector mixing system provided in Embodiment 3 of the present invention.

[0038] icon:

[0039] 100-Furnace head; 110-Outer ring; 120-Middle ring; 130-Furnace head surrounding baffle; 140-Outer ring premixing chamber; 150-Middle ring premixing chamber; 160-Outer ring ejector tube; 170-Middle ring ejector tube; 180-Inner ring;

[0040] 131 - First outer ring air outlet of the partition; 132 - Second outer ring air outlet of the partition; 161 - Outer ring injection inlet; 162 - Second middle ring air outlet; 171 - First middle ring air outlet; 172 - Middle ring injection inlet;

[0041] 200 - Outer ring flame cap; 210 - Flame cap surrounding partition; 220 - Outer ring mixing chamber; 230 - Middle ring mixing chamber;

[0042] 300-Inner ring flame cap. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0044] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0045] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0046] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0047] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but can be slightly tilted.

[0048] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0049] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0050] Example 1

[0051] Reference Figures 1 to 5 This embodiment provides a burner with an ejector mixing system. The burner includes a burner head 100 and an outer ring burner cap 200. The burner head 100 includes at least an outer ring 110 and a middle ring 120. A burner head shroud partition 130 is provided between the outer ring 110 and the middle ring 120. The burner head shroud partition 130 divides the space between the outer ring 110 and the middle ring 120 into an outer ring premixing chamber 140 and a middle ring premixing chamber 150. The air inlet end of the outer ring premixing chamber 140 is provided with an outer ring ejector tube 160, and the air inlet end of the middle ring premixing chamber 150 is provided with a middle ring ejector tube 170. The burner head shroud partition 160... The 30 is provided with a first outer ring gas outlet 131 connecting the outer ring premixing chamber 140 and the outer ring ejector tube 160, and a second outer ring gas outlet 132 connecting the outer ring premixing chamber 140 and the middle ring ejector tube 170; the middle ring ejector tube 170 is provided with a first middle ring gas outlet 171 connecting the middle ring premixing chamber 150; the outer ring burner cover 200 includes an outer ring mixing chamber 220 and a middle ring mixing chamber 230 separated from each other, and the outer ring burner cover 200 is fastened to the burner head 100 so that the outer ring mixing chamber 220 is connected to the outer ring premixing chamber 140 and the middle ring mixing chamber 230 is connected to the middle ring premixing chamber 150.

[0052] The burner with an ejector mixing system provided in this embodiment has a first outer ring outlet 131 on the burner head circumferential partition 130, which connects the outer ring premixing chamber 140 and the outer ring ejector tube 160. This allows the gas to enter the outer ring premixing chamber 140 from the outer ring ejector tube 160 through the first outer ring outlet 131 for premixing. Furthermore, the burner head circumferential partition 130 has a second outer ring outlet 132, which connects the outer ring premixing chamber 140 and the middle ring ejector tube 170. This allows the gas to enter the outer ring premixing chamber 140 from the middle ring ejector tube 170 through the second outer ring outlet 132 for premixing. At the same time, the middle ring ejector tube 170 has a first middle ring outlet 171, which connects the middle ring premixing chamber 150. This allows the gas to enter the middle ring premixing chamber 150 from the middle ring ejector tube 170 through the first middle ring outlet 171 for premixing. Since the outer ring mixing chamber 220 and the middle ring mixing chamber 230 of the outer ring burner cap 200 are separated, and the outer ring burner cap 200 is fastened to the burner head 100, the outer ring mixing chamber 220 can be connected to the outer ring premixing chamber 140, and the middle ring mixing chamber 230 can be connected to the middle ring premixing chamber 150. Therefore, the premixed gas in the outer ring premixing chamber 140 can enter the outer ring mixing chamber 220 for thorough mixing, and at the same time, the premixed gas in the middle ring premixing chamber 150 can enter the middle ring mixing chamber 230 for thorough mixing.

[0053] As can be seen, in this burner with an ejector mixing system, the gas supplied by the outer ring ejector tube 160 can be completely distributed to the outer ring mixing chamber 220 to form the outer ring 110 flame. The gas supplied by the middle ring ejector tube 170 is partially distributed through the first middle ring outlet 171 into the middle ring premixing chamber 150 and the middle ring mixing chamber 230 to form the middle ring 120 flame, and the other part is distributed through the second outer ring outlet 132 of the partition into the outer ring premixing chamber 140 and the outer ring mixing chamber 220 to form the outer ring 110 flame. With this configuration, by controlling the gas flow rate of the outer and middle rings 120, the consistency of the airflow pressure field in the distribution chamber can be ensured, so that the airflow of each flame outlet on the outer ring burner cap 200 (mainly the outer ring 110 flame outlet and the middle ring 120 flame outlet) is uniform, achieving a uniform and stable combustion condition and avoiding flame lift-off and flashback.

[0054] Reference Figures 2 to 5 The outer ring ejector tube 160 extends horizontally, with the outer ring ejector inlet 161 located at the bottom of the outer ring 110; the middle ring ejector tube 170 extends horizontally, with the middle ring ejector inlet 172 located at the bottom of the middle ring 120. This arrangement relatively increases the extension length of the outer ring ejector tube 160 and the middle ring ejector tube 170, which can reduce the flow velocity of the gas-air mixture, promote full mixing of gas and air, thereby improving ejection capacity and achieving complete combustion.

[0055] In simple terms, the primary air for the gas injection enters the outer ring injection tube 160 through the outer ring injection inlet 161. After initial mixing in the outer ring injection tube 160, it enters the outer ring premixing chamber 140 through the first outer ring outlet 131 of the partition, and then flows into the outer ring mixing chamber 220 of the outer ring burner cap 200.

[0056] The gas ejector primary air enters the middle ring ejector tube 170 through the middle ring ejector inlet 172. After preliminary mixing in the middle ring ejector tube 170, most of the mixed gas flows into the middle ring premixing chamber 150 through the first middle ring outlet 171, and a portion of the mixed gas flows into the outer ring premixing chamber 140 through the second outer ring outlet 132 of the partition.

[0057] Specifically, refer to Figures 2 to 5 The outer ring ejector outlet of the outer ring ejector tube 160 is tangent to the bottom surface of the furnace head surrounding partition 130; the middle ring ejector outlet of the middle ring ejector tube 170 is parallel to the bottom surface of the furnace head surrounding partition 130.

[0058] Reference Figure 5 The second outer ring gas outlet 132 of the baffle is located on the cross surface of the furnace head surrounding baffle 130 and the middle ring ejector outlet, and is configured as a circular outlet.

[0059] Reference Figure 4 or Figure 5The outer ring burner cap 200 has a burner cap surrounding partition 210 inside, which divides the interior of the outer ring burner cap 200 into an outer ring mixing chamber 220 and a middle ring mixing chamber 230. The burner cap surrounding partition 210 and the burner head surrounding partition 130 are sealed together in the assembled state to prevent gas from leaking out.

[0060] Reference Figure 1 and Figure 3 The burner with the ejector mixing system also includes an inner ring burner cap 300; the burner head 100 also includes an inner ring 180, which is located on the inner circumference of the middle ring 120; the inner ring burner cap 300 is fastened to the inner ring 180, wherein the gas supply of the inner ring 180 can be provided by the inner ring ejector tube, which will not be described in detail here.

[0061] Reference Figure 2 and Figure 3 The outer ring ejector tube 160 and the middle ring ejector tube 170 are arranged on both sides of the inner ring 180, and a gap is left between them to form an air passage. Air can flow from the bottom of the burner head 100 through the air passage to the outer ring burner cap 200 and around the copper core, providing secondary air for the combustion of gas on the outer ring burner cap 200.

[0062] Among them, reference Figure 3 The outer ring ejector 160 and the middle ring ejector 170 are arranged in parallel and opposite directions, that is, the gas in the two has opposite flow paths and does not affect the gas supply of each other.

[0063] Example 2

[0064] This second embodiment also provides a burner with an ejector mixing system, which differs from the first embodiment in that: (Refer to...) Figure 6 and Figure 7 The outer ring ejector tube 160 is provided with a second middle ring outlet 162 that connects to the middle ring premixing chamber 150; wherein, the total area of ​​the first middle ring outlet 171 and the second middle ring outlet 162 and the total area of ​​the first outer ring outlet 131 and the second outer ring outlet 132 of the partition are set according to the power ratio of the outer ring 110 and the middle ring 120.

[0065] For example, when the internal / external power ratio is 1 / 3, the corresponding ratio of the middle ring air outlet area to the outer ring air outlet area is 1 / 3.

[0066] In this scheme, for the outer ring ejector tube 160, most of the gas supplied by the outer ring ejector tube 160 enters the outer ring premixing chamber 140 through the first outer ring gas outlet 131 of the partition, and a small part enters the middle ring premixing chamber 150 through the second middle ring gas outlet 162; for the middle ring ejector tube 170, refer to the aforementioned embodiment one, and will not be repeated here.

[0067] Compared to Example 1, Example 2 allocates more gas to the central ring premixed chamber 150, thus meeting the requirements of a larger central ring ignition and ensuring a sufficient supply of gas to the central ring.

[0068] Example 3

[0069] Reference Figure 8 This embodiment three also provides a burner with an ejector mixing system, which differs from embodiment one or embodiment two in that the outer ring ejector tube 160 and the middle ring ejector tube 170 are arranged in parallel and in the same direction, that is, the gas in both has the same flow path.

[0070] It should be noted that, for parallel and opposing or parallel and unidirectional arrangements, the corresponding hole positions (i.e., the holes through which the gas passes) on the burner ring baffle 210 need to be adjusted accordingly so that the gas can enter the corresponding cavity.

[0071] Example 4

[0072] This fourth embodiment provides a gas stove that includes the burner with an ejector mixing system from the previous embodiments. Since the gas stove provided in this embodiment includes a burner with an ejector mixing system, the technical advantages and effects achieved by this gas stove also include those achieved by a burner with an ejector mixing system, which will not be repeated here.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions 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. A burner with an ejector mixing system, characterized in that, include: Burner head (100) and outer ring burner cap (200); The burner head (100) includes at least an outer ring (110) and a middle ring (120). A burner head circumferential partition (130) is provided between the outer ring (110) and the middle ring (120). The burner head circumferential partition (130) divides the space between the outer ring (110) and the middle ring (120) into an outer ring premixing chamber (140) and a middle ring premixing chamber (150). The air inlet end of the outer ring premixing chamber (140) is provided with an outer ring ejector tube (160), and the air inlet end of the middle ring premixing chamber (150) is provided with a middle ring ejector tube (170). The furnace head surrounding partition (130) is provided with a first outer ring gas outlet (131) connecting the outer ring premixing chamber (140) and the outer ring ejector (160), and a second outer ring gas outlet (132) connecting the outer ring premixing chamber (140) and the middle ring ejector (170); the middle ring ejector (170) is provided with a first middle ring gas outlet (171) connecting the middle ring premixing chamber (150); The outer ring burner cap (200) includes an outer ring mixing chamber (220) and a middle ring mixing chamber (230) that are separated from each other. The outer ring burner cap (200) is fastened to the burner head (100) so that the outer ring mixing chamber (220) is connected to the outer ring premixing chamber (140) and the middle ring mixing chamber (230) is connected to the middle ring premixing chamber (150).

2. The burner with an ejector mixing system according to claim 1, characterized in that, The outer ring ejector tube (160) extends horizontally, and the outer ring ejector inlet (161) is located at the bottom of the outer ring (110); The central ring ejector tube (170) extends horizontally, and the central ring ejector inlet (172) is located at the bottom of the central ring (120).

3. The burner with an ejector mixing system according to claim 2, characterized in that, The outer ring ejector outlet of the outer ring ejector tube (160) is tangential to the bottom surface of the furnace head surrounding partition plate (130); And / or, the central ring ejector outlet of the central ring ejector tube (170) is arranged parallel to the bottom surface of the furnace head surrounding partition (130).

4. The burner with an ejector mixing system according to claim 3, characterized in that, The second outer ring gas outlet (132) of the baffle is located on the cross-section of the furnace head surrounding baffle (130) and the middle ring ejector outlet, and is configured as a circular outlet.

5. The burner with an ejector mixing system according to claim 1, characterized in that, The outer ring ejector tube (160) is provided with a second middle ring air outlet (162) that connects to the middle ring premixing chamber (150); The sum of the areas of the first middle ring air outlet (171) and the second middle ring air outlet (162) and the sum of the areas of the first outer ring air outlet (131) and the second outer ring air outlet (132) of the partition are set according to the power ratio of the outer ring (110) and the middle ring (120).

6. The burner with an ejector mixing system according to claim 1, characterized in that, The outer ring ejector tube (160) is arranged parallel to and opposite to the middle ring ejector tube (170) or parallel to and in the same direction.

7. The burner with an ejector mixing system according to claim 1, characterized in that, The outer ring flame cap (200) is provided with a flame cap surrounding partition (210) inside, which divides the interior of the outer ring flame cap (200) into the outer ring mixing chamber (220) and the middle ring mixing chamber (230); The surfaces of the fire cover baffle (210) and the furnace head baffle (130) are sealed together in the assembled state.

8. The burner with an ejector mixing system according to any one of claims 1-7, characterized in that, It also includes the inner ring fire cap (300); The burner head (100) also includes an inner ring (180), which is located on the inner circumferential side of the middle ring (120); The inner ring fire cap (300) is fastened to the inner ring (180).

9. The burner with an ejector mixing system according to claim 8, characterized in that, The outer ring ejector tube (160) and the middle ring ejector tube (170) are arranged on both sides of the inner ring (180), and a gap is left between them to form an air channel.

10. A gas stove, characterized in that, include: The burner with an ejector mixing system according to any one of claims 1-9.

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