Fire cover assembly, combustor and stove

Abstract

The invention provides a fire cover assembly, a combustor and a stove. A fire cover cavity is defined by the fire cover assembly, an annular groove and a plurality of outer ring fire holes communicated with fluid of the fire cover cavity are formed in the top side of the fire cover assembly, the annular groove extends in the circumferential direction of the fire cover assembly in a closed mode, and the outer ring fire holes are formed in the circumferential direction of the fire cover assembly at intervals. An overflow channel and a flame stabilizing channel communicated with fluid of the fire cover cavity are arranged in the annular groove, so that liquid overflowing on the top side of the fire cover assembly is discharged through the overflow channel, and stable flame is formed at the position of the annular groove through fuel gas flowing out of the flame stabilizing channel. According to the burner cap assembly, the blow-off phenomenon can be avoided from the source, and the problem that due to the fact that liquid blocks the outer ring fire holes and the flame stabilizing channel, gas circulation is not smooth, and flame abnormity is further aggravated is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of kitchen appliances, in particular to a fire cover assembly, a burner comprising the fire cover assembly, and a cooking appliance comprising the fire cover assembly or the burner. BACKGROUND

[0002] As a core kitchen appliance in household and commercial cooking scenarios, the design of the combustion system of a gas stove directly determines the combustion efficiency, flame stability, and use safety. As a key component of the combustion system, the fire cover plays an important role in mixing gas and air, distributing gas flow, and supporting flame combustion.

[0003] The fire cover of the prior art gas stove usually adopts a single fire hole structure, and the top of the fire cover is usually flat or simply arc-shaped. In actual use, on the one hand, when the gas pressure fluctuates, the air intake is unstable, or the cooking environment airflow is disturbed, the flame is prone to drift, blowout, or even backfire, which not only reduces the heat utilization rate and affects the cooking efficiency, but also may cause incomplete combustion of gas due to unstable flame, generating harmful gases such as carbon monoxide, and there is a safety hazard. On the other hand, liquids such as soup and oil stains generated during cooking are easily spilled from the pot and fall onto the surface of the fire cover. Since the top of the fire cover has no flow guide structure, the spilled liquid is easy to block the fire hole, causing poor gas flow, further exacerbating the flame abnormality problem, and the liquid penetrating into the interior of the fire cover will also corrode the internal components, shortening the service life of the fire cover. SUMMARY

[0004] The present application aims to solve at least one of the above problems and / or other problems in the prior art.

[0005] To achieve the object of the present application, the present application adopts the following technical solutions: According to one aspect of the present application, a fire cover assembly is provided, which defines a fire cover cavity and has an annular groove and a plurality of outer annular fire holes in fluid communication with the fire cover cavity arranged on the top side thereof, the annular groove extends closed along the circumference of the fire cover assembly, and the plurality of outer annular fire holes are arranged spaced apart from each other along the circumference of the fire cover assembly, wherein the annular groove is arranged with an overflow channel and a flame stabilizing channel in fluid communication with the fire cover cavity, to discharge the liquid overflowing on the top side of the fire cover assembly through the overflow channel, and to form a stable flame at the annular groove by the gas flowing out of the flame stabilizing channel.

[0006] According to an embodiment of the present application, the fire cap assembly includes a fire cap body defining the fire cap cavity and an auxiliary member in the form of a ring, the auxiliary member being disposed at an outer periphery of the fire cap body to collectively define the annular groove and the overflow passage with the fire cap body, the plurality of outer ring fire holes and the pilot passage being disposed on the fire cap body.

[0007] According to an embodiment of the present application, the fire cap body includes an outer ring end wall, an intermediate ring end wall disposed radially inward of the outer ring end wall, and an outer ring top wall extending from the outer ring end wall to the intermediate ring end wall, the auxiliary member being disposed on the outer ring top wall to collectively define the annular groove with the outer ring top wall and the intermediate ring end wall.

[0008] According to an embodiment of the present application, the outer ring top wall is provided with a plurality of support portions arranged circumferentially at intervals from each other and protruding toward the auxiliary member, so as to define the overflow passage between two adjacent ones of the support portions via the outer ring top wall and the auxiliary member when the auxiliary member is connected to the plurality of support portions.

[0009] According to an embodiment of the present application, the outer ring end wall is disposed at a lower side of the intermediate ring end wall in a direction of gravity, and the outer ring top wall extends obliquely from a bottom side of the intermediate ring end wall to a top side of the outer ring end wall, so that an inlet of the overflow passage is located at a top side of an outlet thereof.

[0010] According to an embodiment of the present application, the intermediate ring end wall is provided with a recess inward in a radial direction, and the pilot passage includes a pilot hole disposed in the recess and in fluid communication with the fire cap cavity.

[0011] According to an embodiment of the present application, the recess extends closedly along a circumferential direction of the intermediate ring end wall, and the pilot passage includes a plurality of pilot holes arranged at intervals from each other along the circumferential direction of the recess.

[0012] According to an embodiment of the present application, the auxiliary member is provided with at least one protrusion embeddable into the recess, the protrusion being shaped to match a shape of the recess.

[0013] According to an embodiment of the present application, the fire cap body further includes an inner ring wall disposed radially inward of the intermediate ring end wall, and an inner ring top wall extending from the inner ring wall to the intermediate ring end wall, the plurality of outer ring fire holes being disposed on the inner ring top wall.

[0014] According to an embodiment of the present application, the inner ring top wall extends obliquely from a top end of the inner ring wall toward the outer ring end wall.

[0015] According to another aspect of the present application, a burner is provided. The burner includes a pilot burner defining a central cavity and an outer annular cavity, an inner cap disposed at a top opening of the central cavity, and a cap assembly as described above disposed at a top opening of the outer annular cavity.

[0016] According to another aspect of the present application, a cooktop is provided. The cooktop includes a cap assembly or a burner as described above.

[0017] One embodiment of the present application has the following advantages or benefits: The cap assembly of the present application, by arranging the overflow channel and the flame-holding channel in the annular groove, on one hand, when a portion of the gas is ejected from the outer annular burner hole to form a flame, another portion of the gas forms a flame-holding at the annular groove via the flame-holding channel, which will form a low-pressure backflow area in the groove due to the change of the gas flow direction. The root of the flame will be "absorbed" by this low-pressure area and will not be separated from the outer annular burner hole due to external disturbances such as the wind power of the range hood, the air flow of the open window, etc., thereby fundamentally avoiding the flame-out phenomenon. On the other hand, the liquid that overflows and drips on the top of the cap assembly can enter the annular groove and be discharged out of the cap assembly via the overflow channel, thereby preventing the liquid from blocking the outer annular burner hole and the flame-holding channel to further aggravate the flame abnormality problem. BRIEF DESCRIPTION OF DRAWINGS

[0018] The above and other features and advantages of the present application will become more apparent by describing in detail example embodiments thereof with reference to the attached drawings in which:

[0019] Figure 1 A perspective view of a cap assembly of an embodiment of the present application is shown.

[0020] Figure 2 A perspective view of a burner of an embodiment of the present application is shown. Figure 1 An exploded view of the cap assembly shown.

[0021] Figure 3 A perspective view of a burner of an embodiment of the present application is shown. Figure 1 A schematic view of the cap assembly shown at the overflow channel and the flame-holding channel.

[0022] Figure 4 A schematic view of the cap assembly shown at the convex portion and the concave portion cooperating with each other. Figure 1 A schematic view of the cap assembly shown at the convex portion and the concave portion cooperating with each other.

[0023] Figure 5 A perspective view of a burner of an embodiment of the present application is shown.

[0024] Figure 6 A perspective view of a burner of an embodiment of the present application is shown. Figure 5 An internal schematic view of the burner shown.

[0025] Wherein, the reference signs are explained as follows: 100. Flame cap assembly; 200. Flame distributor; 201. Central cavity; 202. Outer ring cavity; 300. Inner flame cap; 1. Flame cap cavity; 2. Annular groove; 3. Outer ring flame hole; 4. Overflow channel; 5. Flame stabilizing channel; 51. Flame stabilizing hole; 6. Flame cap body; 61. Outer ring end wall; 62. Middle ring end wall; 63. Outer ring top wall; 64. Support part; 65. Recess; 66. Inner ring wall; 67. Inner ring top wall; 7. Auxiliary component; 71. Protrusion. Detailed Implementation

[0026] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that the invention will be thorough and complete, and the concept of the exemplary embodiments will be fully conveyed to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0027] The terms “a,” “one,” “the,” and “the” are used to indicate the existence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended meaning of inclusion and that other elements / components / etc. may exist in addition to the listed elements / components / etc.

[0028] As described in the background section, existing gas stove burner caps mostly employ a single flame outlet structure, with the top typically featuring a flat or simple curved design. This structure makes the flame prone to drifting, detachment, or even backfire when there are fluctuations in gas pressure, unstable airflow, or turbulent airflow in the cooking environment. Furthermore, liquids such as broth and oil produced during cooking easily overflow from the cookware and drip onto the burner cap surface. Since there is no flow guiding structure on the top of the burner cap, the overflowing liquid easily clogs the flame outlet, causing poor gas flow and further exacerbating flame abnormalities.

[0029] Figures 1 to 4 A flame cap assembly 100 according to an embodiment of the present invention is shown. For example... Figure 1As shown, the burner assembly 100 defines a burner cavity 1, and an annular groove 2 and a plurality of outer annular flame holes 3 are arranged on the top side of the burner assembly 100. The axial end of the bottom side of the burner cavity 1 has an opening. The annular groove 2 extends circumferentially closed along the burner assembly 100. The plurality of outer annular flame holes 3 are arranged at intervals along the circumference of the burner assembly 100 and are in fluid communication with the top side of the burner cavity 1, respectively. These outer annular flame holes 3 are arranged radially inside the annular groove 2. The top of the burner assembly 100 is inclined radially outward toward the direction of gravity, and the annular groove 2 is located radially outside the plurality of outer annular flame holes 3. An overflow channel 4 and a flame stabilizing channel 5 are provided in the annular groove 2. The flame stabilizing channel 5 is in fluid communication with the burner cavity 1 above the burner cavity 1, thereby allowing the combustion gas from the flame stabilizing channel to form a stable flame at the annular groove 2. The overflow channel 4 is located radially outside the outer annular flame holes 3, relative to the flame stabilizing channel 5. Therefore, the liquid overflowing at the top of the burner assembly 100 can be discharged from the burner assembly 100 through the overflow channel 4.

[0030] In other embodiments, when the top side of the flame cap assembly 100 is inclined in a radially inward direction, the annular groove 2 may also be arranged radially inside the plurality of outer annular flame holes 2, the flame stabilizing channel 5 is arranged in the annular groove 2 close to the outer annular flame holes 2, and the overflow channel 4 is arranged on the side of the flame stabilizing channel 5 away from the outer annular flame holes 2.

[0031] Compared to existing technologies, the burner cap assembly 100 of this embodiment, by arranging an overflow channel 4 and a flame stabilizing channel 5 within the annular groove 2, achieves several advantages. Firstly, when a portion of the gas is ejected from the outer ring burner hole 3 to form a flame, another portion of the gas forms a stable flame at the annular groove 2 via the flame stabilizing channel 5. This changes the airflow direction, creating a low-pressure backflow zone within the groove. The root of the flame is "absorbed" by this low-pressure zone, preventing it from detaching from the outer ring burner hole 3 due to external disturbances such as the range hood's airflow or open window airflow, thus preventing flame detachment at its source. Secondly, liquid overflowing and dripping onto the top of the burner cap assembly 100 can enter the annular groove 2 and be discharged outside the burner cap assembly 100 via the overflow channel 4, preventing liquid from clogging the outer ring burner hole 3 and the flame stabilizing channel 5, thus avoiding poor gas flow and further exacerbating flame abnormalities.

[0032] refer to Figures 1 to 3As shown, the flame cap assembly 100 according to this embodiment may include a flame cap body 6 and an auxiliary member 7. The flame cap body 6 defines a flame cap cavity 1, and the auxiliary member 7 is generally annular and disposed on the radially outer periphery of the top of the flame cap body 6, so as to define an annular groove 2 and an overflow channel 4 together with the flame cap body 6. A plurality of outer annular flame holes 3 and a flame stabilizing channel 5 are disposed on the flame cap body 6. Thus, the plurality of outer annular flame holes 3 and the flame stabilizing channel 5 can be in fluid communication with the flame cap cavity 1 on the flame cap body 6, and the overflow channel 4 is disposed outside the plurality of outer annular flame holes 3 and the flame stabilizing channel 5, so as to facilitate the drainage of overflow liquid to the radially outer side of the flame cap body 6 and discharge it out of the flame cap assembly 100.

[0033] Specifically, refer to Figure 3 As shown, the flame cap body 6 may include an outer ring end wall 61, an intermediate ring end wall 62, and an outer ring top wall 63. The outer ring end wall 61 and the intermediate ring end wall 62 are respectively arranged in two circumferential directions with different radii of the flame cap body 6, and the outer ring end wall 61 is radially outside the intermediate ring end wall 62. The outer ring top wall 63 extends radially outward from the intermediate ring end wall 62 along the flame cap body 6 to the outer ring end wall 61, so that an auxiliary member 7 can be disposed on the outer ring top wall 63, and there is a gap between the radially inner end of the auxiliary member 7 and the intermediate ring end wall. Thus, the annular groove 2 can be defined by the auxiliary member 7, the outer ring top wall 63, and the intermediate ring end wall 62.

[0034] Combination Figure 2 and Figure 3 As shown, a plurality of support portions 64 are provided on the outer ring top wall 63, arranged at intervals along its circumference. Each support portion 64 protrudes along the axial direction of the flame cap body 6 and toward the side where the auxiliary member 7 is located, such that the auxiliary member 7 abuts against the plurality of support portions 64 when connected to the flame cap body 6. In this way, an overflow channel 4 can be defined between two adjacent support portions 64 via the auxiliary member 7 and the outer ring top wall 63. The outlet of the overflow channel 4 is provided at the outer ring end wall 61 of the flame cap body 6.

[0035] refer to Figure 3 As shown, the outer ring end wall 63 is disposed below the middle ring end wall 62 along the gravity direction X, and the top end of the outer ring end wall 61 can have a gap with the bottom end of the middle ring end wall 62 in the axial direction of the flame cap body 6, thereby allowing the outer ring top wall 63 to extend obliquely from the bottom end of the middle ring end wall 62 to the top end of the outer ring end wall 61 along the gravity direction X. Thus, the inlet of the overflow channel 4 is located at the radially inner end of the auxiliary member 7, and the outlet is located at the radially outer end of the auxiliary member 7. Overflow liquid enters the overflow channel 4 from the annular groove 2 through the inlet and flows out of the flame cap assembly 100 through the outlet.

[0036] refer to Figure 2 and Figure 3As shown, the intermediate annular end wall 62 is provided with a recess 65. The recess 65 is recessed radially inward from the intermediate annular end wall 62 along the burner cap body 6. The flame stabilizing channel 5 may include a flame stabilizing hole 51, which is disposed within the recess 65 and is in fluid communication with the burner cap cavity 1. This allows the combustion gas to flow out through the flame stabilizing hole 51 and burn at the annular groove 2 to form a stable flame. Furthermore, under the protection of the intermediate annular end wall 62 of the burner cap body 6, the overflow liquid at the top of the burner cap body 6 will not drip directly into the flame stabilizing hole 51.

[0037] For ease of processing, the recess 65 can extend circumferentially and closedly along the intermediate ring end wall 62 to form an annular recess surrounding the intermediate ring end wall 62, such as... Figure 2 and Figure 4 As shown. The flame stabilization channel 5 may include a plurality of flame stabilization holes 51, which are arranged at intervals along the circumference of the intermediate ring end wall 62.

[0038] refer to Figure 2 and Figure 4 The auxiliary member 7 is provided with at least one protrusion 71. The shape of the protrusion 71 is adapted to the shape of the recess 65 so that when the auxiliary member 7 is installed on the flame cap body 6, the protrusion 71 can be embedded in the recess 65. By rotating the auxiliary member 7, the auxiliary member 7 can rotate with the flame cap body 6, and the protrusion 71 can clean dirt and other contaminants from the recess 65, preventing these contaminants from clogging the flame stabilizing hole 51. On the other hand, the protrusion 71 embedded in the recess 65 can prevent the auxiliary member 7 from falling off the flame cap body 6. In this embodiment, four protrusions 71 are provided. That is, the number of protrusions 71 can be selectively set according to actual needs.

[0039] Optionally, the flame cap body 6 is also provided with a notch (not shown) on the top side of the recess 65. The number and shape of the notch are adapted to the number and circumferential shape of the protrusions 71 on the auxiliary member 7, so that when the auxiliary member 7 can be installed from above the flame cap body 6, the protrusions 71 can pass through the corresponding notch and be embedded in the recess 65.

[0040] refer to Figure 3 and Figure 4 As shown, the flame cap body 6 according to this embodiment may further include an inner annular wall 66 and an inner annular top wall 67. The inner annular wall 66 is disposed radially inside the intermediate annular end wall 62 and may include a first annular segment and a second annular segment, wherein the first annular segment extends axially along the flame cap body 6, and the second annular segment extends radially outward from the top of the first annular segment and obliquely in a direction away from the first annular segment. The inner annular top wall 67 extends from the top of the inner annular wall 66 (that is, the top of the second annular segment) to the top of the intermediate annular end wall 62. A plurality of outer annular flame holes 3 are arranged at intervals in the circumferential direction of the inner annular top wall 67.

[0041] Optionally, the inner ring top wall 67 extends obliquely from the top of the inner ring wall 66 toward the outer ring end wall 61, preferably in the same direction as the outer ring top wall 63, thereby guiding more of the overflow from the top side of the flame cap assembly 100 into the annular groove 2.

[0042] According to one embodiment of the present invention, a burner is also provided, such as Figure 5 and Figure 6 As shown. The burner may include a flame spreader 200, an inner flame cap 300, and the aforementioned flame cap assembly 100. The flame spreader 200 defines a central cavity 201 and an outer annular cavity 202. The central cavity 201 is located radially at the center of the outer annular cavity 202 and is arranged radially spaced apart from each other in the outer annular cavity 202. The top of the central cavity 201 and the outer annular cavity 202 each have an opening. The inner flame cap 300 is located at the top opening of the central cavity 201, and the bottom opening of the flame cap assembly 100 is aligned with the top opening of the outer annular cavity (202).

[0043] According to one embodiment of the present invention, a stove is also provided, which may include the aforementioned burner assembly 100 or burner.

[0044] In this embodiment of the invention, the term "multiple" refers to two or more, unless otherwise explicitly defined. The terms "install," "connect," and "fix" should be interpreted broadly. For example, "connect" can mean a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention based on the specific circumstances.

[0045] In the description of the embodiments of the present invention, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0046] In the description of this specification, the terms "an embodiment," "a preferred embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0047] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. For those skilled in the art, the embodiments of the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of the present invention should be included within the protection scope of the embodiments of the present invention.

Claims

1. A flame cap assembly, characterized in that, The flame cap assembly (100) defines a flame cap cavity (1) and has an annular groove (2) and a plurality of outer annular flame holes (3) in fluid communication with the flame cap cavity (1) arranged on its top side. The annular groove (2) extends in a closed manner along the circumference of the flame cap assembly (100), and the plurality of outer annular flame holes (3) are arranged at intervals from each other along the circumference of the flame cap assembly (100). The annular groove (2) is provided with an overflow channel (4) and a flame stabilizing channel (5) that is in fluid communication with the burner chamber (1) so that the liquid overflowing on the top side of the burner assembly (100) can be discharged through the overflow channel (4) and a flame stabilizing channel can be formed in the annular groove (2) by the gas flowing out from the flame stabilizing channel (5).

2. The flame cap assembly according to claim 1, characterized in that, The flame cap assembly (100) includes a flame cap body (6) defining the flame cap cavity (1) and an annular auxiliary member (7). The auxiliary member (7) is disposed at the outer periphery of the flame cap body (6) to define the annular groove (2) and the overflow channel (4) together with the flame cap body (6). The plurality of outer annular flame holes (3) and the flame stabilizing channel (5) are disposed on the flame cap body (6).

3. The flame cap assembly according to claim 2, characterized in that, The flame cap body (6) includes an outer ring end wall (61), a middle ring end wall (62) and an outer ring top wall (63). The middle ring end wall (62) is disposed on the radial inner side of the outer ring end wall (61). The outer ring top wall (63) extends from the outer ring end wall (61) to the middle ring end wall (62). The auxiliary member (7) is disposed on the outer ring top wall (63) to define the annular groove (2) together with the outer ring top wall (63) and the middle ring end wall (62).

4. The flame cap assembly according to claim 3, characterized in that, The outer ring top wall (63) is provided with a plurality of support portions (64) arranged circumferentially at intervals and protruding toward the auxiliary member (7) to define the overflow channel (4) between two adjacent support portions (64) via the outer ring top wall and the auxiliary member (7) when the auxiliary member (7) is connected to the plurality of support portions (64).

5. The flame cap assembly according to claim 4, characterized in that, The outer ring end wall (61) is disposed on the lower side of the middle ring end wall (62) along the direction of gravity, and the outer ring top wall (63) extends obliquely from the bottom side of the middle ring end wall (62) to the top side of the outer ring end wall (61) so that the inlet of the overflow channel (4) is located on the top side of its outlet.

6. The flame cap assembly according to claim 3, characterized in that, The intermediate ring end wall (62) is provided with a radially inward recess (65), and the flame stabilizing channel (5) includes a flame stabilizing hole (51) disposed in the recess (65) and in fluid communication with the flame cap cavity (1).

7. The flame cap assembly according to claim 6, characterized in that, The recess (65) extends circumferentially closed along the intermediate ring end wall (62), and the flame stabilizing channel (5) includes a plurality of flame stabilizing holes (51) arranged at intervals along the circumferential direction of the recess (65).

8. The flame cap assembly according to claim 7, characterized in that, The auxiliary member (7) is provided with at least one protrusion (71) that can be embedded in the recess (65), the shape of the protrusion (71) being adapted to the shape of the recess (65).

9. The flame cap assembly according to any one of claims 3 to 8, characterized in that, The main body of the flame cap also includes an inner ring wall (66) and an inner ring top wall (67). The inner ring wall (66) is located on the radial inner side of the middle ring end wall (62). The inner ring top wall (67) extends from the inner ring wall (66) to the middle ring end wall (62). The outer ring flame hole (3) is located on the inner ring top wall (67).

10. The flame cap assembly according to claim 9, characterized in that, The inner ring top wall (67) extends obliquely from the top of the inner ring wall (66) toward the outer ring end wall (61).

11. A burner, characterized in that, The burner includes a flame spreader (200), an inner flame cap (300), and a flame cap assembly (100) according to any one of claims 1 to 10, the flame spreader (200) defining a central cavity (201) and an outer annular cavity (202), the inner flame cap (300) being disposed at the top opening of the central cavity (201), and the flame cap assembly (100) being disposed at the top opening of the outer annular cavity (202).

12. A stove, characterized in that, The stove includes: The burner assembly (100) according to any one of claims 1 to 10 or the burner according to claim 11.

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