Inner fire cover and combustor

Abstract

The invention provides an inner fire cover and a combustor, and relates to the technical field of gas cooks.The inner fire cover mainly comprises a cover body, and the cover body is provided with multiple sets of fire outlet holes with different heights; the cover body is provided with an air supply channel extending in the height direction, and an air outlet of the air supply channel is located between the highest fire outlet hole and the second highest fire outlet hole. According to the embodiment provided by the invention, air outside the lower end of the inner fire cover main body is continuously supplemented to the highest fire outlet hole and the second-height fire outlet hole through the air supply channel, so that flame combustion of the highest fire outlet hole and the second-height fire outlet hole is more sufficient and thorough due to directional supplementation of secondary air, waste gas generated by combustion is greatly reduced, and the service life of the inner fire cover main body is prolonged. Meanwhile, multiple circles of flames are formed, so that the combustion load is increased, the heat efficiency is improved, cooking is more convenient, and the user experience feeling is improved.

Description

Technical Field

[0001] The invention relates to the technical field of gas cookers, and in particular to an inner fire cover and a burner. Background Art

[0002] At present, the burners of most household gas stoves are atmospheric burners, also known as partial premixed burners. Its working principle is: the gas flows out from the nozzle at a certain pressure and a certain flow rate, enters the ejector tube, and relies on the ejection effect of the gas's own energy to attract a certain amount of surrounding air, which is called "primary air". The primary air and gas are mixed in the ejector tube and the burner mixing chamber, and then flow out through the fire hole for combustion. During the combustion process, air is attracted from around the flame to assist combustion, and this part of air is called "secondary air". The burner is provided with a fire cover for direct fire and contact with the pot. The fire cover is provided with a fire hole, and the gas will be ejected outward from the fire hole. The gas is ignited and burns to form a flame. In the prior art, the traditional inner fire cover is generally annular, and its structural form is that the side wall of the inner fire cover is provided with a number of circular fire holes, and the fire hole and the fire cover are integrated.

[0003] This type of inner fire cover has the following problems: the root of the flame is on the side wall of the fire cover, and the pot body is usually directly above the inner ring fire cover. The flame comes out from the side wall of the fire cover and contacts the pot body to form a conical "fire wall". The fire wall blocks the entry of external air, and the secondary air is not fully replenished, the combustion worsens, and the flame temperature is low, resulting in a low temperature in the center, making the food in the center of the pot difficult to cook, resulting in uneven food cooking and reduced user experience. Summary of the invention

[0004] In view of the shortcomings of the existing methods, the present application provides an inner fire cover and a burner to solve the technical problems in the prior art such as insufficient secondary air supply to the inner fire cover resulting in deteriorated combustion, low flame temperature, low temperature in the center, making it difficult to cook food in the center of the pot, resulting in uneven cooking of food and reduced user experience.

[0005] In the first aspect, an embodiment of the present application provides an internal fire cover, which mainly includes a cover body, which is provided with multiple groups of fire holes with different heights; the cover body has an air supply channel extending along the height direction, and the air outlet of the air supply channel is located between the highest fire hole and the second highest fire hole.

[0006] As an optional embodiment, the cover body includes a first layer body and a second layer body which are cylindrically arranged in sequence from high to low along the height direction; the highest fire outlet hole is opened in the side wall of the first layer body along the circumferential direction, and the remaining fire outlet holes are opened in the side wall of the second layer body; in the height direction, the projection of the second layer body covers the projection of the first layer body, and the air outlet of the air supply channel is opened at the top of the second layer body and surrounds the outside of the first layer body.

[0007] As an optional embodiment, the inner fire cover also includes a guide groove, which is recessed downward and formed on the top of the second layer body. The guide groove surrounds the outside of the first layer body, and the air outlet of the air supply channel is connected to the guide groove.

[0008] As an optional embodiment, the fire holes include a first fire hole, a second fire hole and a third fire hole with decreasing heights; the first fire hole is opened in the first layer, and the second fire hole and the third fire hole are both opened circumferentially on the side wall of the second layer; the aperture of the first fire hole is smaller than the aperture of the second fire hole, and the aperture of the second fire hole is smaller than or equal to the aperture of the third fire hole.

[0009] As an optional implementation, the second fire outlet hole and the third fire outlet hole are staggered with each other in the height direction.

[0010] As an optional implementation, the inner fire cover further includes a flame stabilizing groove and a flame stabilizing hole opened in the flame stabilizing groove; in the height direction, the flame stabilizing groove is opened between the second fire outlet hole and the third fire outlet hole.

[0011] As an optional implementation, the cross-section of the guide groove in the height direction is narrow at the bottom and wide at the top.

[0012] As an optional implementation, the cross-section of the guide groove in the height direction is V-shaped.

[0013] As an optional embodiment, the inner fire cover also includes an annular groove; the opening of the annular groove faces outward; in the height direction, the annular groove is lower than the lowest fire outlet, and the air inlet of the air supply channel is opened in the annular groove; the transverse cross-sectional area of ​​the air supply channel is smaller than the longitudinal cross-sectional area of ​​the annular groove, and is also smaller than the longitudinal cross-sectional area of ​​the guide groove.

[0014] In a second aspect, an embodiment of the present application provides a burner comprising the inner fire cover described in any one of the aforementioned embodiments.

[0015] The present application provides an inner fire cover and a burner. The technical solution provided by the embodiments of the present application brings at least the following beneficial effects:

[0016] Through the air supply channel, the air outside the lower end of the inner fire cover body is continuously replenished to the highest fire hole and the second highest fire hole. The directional replenishment of secondary air makes the flames of the highest fire hole and the second highest fire hole burn more fully and thoroughly, greatly reduces the exhaust gas generated by combustion, reduces pollution, and forms multiple circles of flames to increase the combustion load, improve thermal efficiency, make cooking more convenient, and enhance user experience.

[0017] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0019] Figure 1 A schematic diagram of the structure of an inner fire cover provided in an embodiment of the present application;

[0020] Figure 2 A schematic structural diagram of a longitudinal section of an inner fire cover provided in an embodiment of the present application;

[0021] Figure 3 A schematic structural diagram of a longitudinal section of an inner fire cover provided in another embodiment of the present application;

[0022] Figure 4 A schematic diagram of the distribution of gas combustion flames in an inner fire cover provided in an embodiment of the present application.

[0023] Reference numerals and corresponding descriptions:

[0024] 1: cover body; 11: first layer body; 12: second layer body;

[0025] 2: Fire hole; 21: The first fire hole; 22: The second fire hole; 23: The third fire hole;

[0026] 3: Air supply channel;

[0027] 4: diversion trough;

[0028] 5: Flame stabilizing tank;

[0029] 6: Flame stabilizing hole;

[0030] 7: Annular groove. DETAILED DESCRIPTION

[0031] The present application is described in detail below, and examples of embodiments of the present application are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar components or components with the same or similar functions. In addition, if the detailed description of the known technology is unnecessary for the features of the present application shown, it will be omitted. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be interpreted as limiting the present application.

[0032] Those skilled in the art will appreciate that, unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present application refers to the presence of the features, elements and / or components, but does not exclude the presence or addition of one or more other features, elements, components and / or groups thereof. The term "and / or" used herein includes all or any unit and all combinations of one or more associated listed items.

[0033] like Figure 1-4 As shown, an embodiment of the present application provides an internal fire cover, which mainly includes a cover body 1, and the cover body 1 is provided with multiple groups of fire holes 2 with different heights; the cover body 1 has an air supply channel 3 extending along the height direction, and the air outlet of the air supply channel 3 is located between the highest fire hole 2 and the second highest fire hole 2.

[0034] In this embodiment, the cover body 1 is arranged on a horizontal plane, and the height direction of the cover body 1 is the vertical direction. The cover body 1 is hollow inside, the bottom of the cover body 1 is open, and the top is closed to form a receiving cavity. Each group of fire outlet holes 2 includes a plurality of hole structures, and the plurality of hole structures of each group of fire outlet holes 2 are located at the same height.

[0035] The air supply channel 3 is opened on the cover wall of the cover body 1, and the air supply channel 3 extends vertically. The air inlet of the air supply channel 3 is located at the bottom end of the air supply channel 3, and the air outlet of the air supply channel 3 is located at the top end of the air supply channel 3. The air supply channel 3 is used to provide air to the fire outlet hole 2 at the highest point.

[0036] The inner fire cover provided in the embodiment of the present application continuously replenishes the air from the outside of the lower end of the inner fire cover body to the highest fire hole 2 and the second highest fire hole 2 through the air supply channel 3. The directional replenishment of secondary air makes the flames of the highest fire hole 2 and the second highest fire hole 2 burn more fully and thoroughly, greatly reduces the exhaust gas generated by combustion, reduces pollution, and simultaneously forms multiple circles of flames, increases the combustion load, improves thermal efficiency, makes cooking more convenient, and enhances user experience.

[0037] As an optional embodiment, the cover body 1 includes a cylindrical first layer body 11 and a second layer body 12 which are arranged in sequence from high to low along the height direction; the highest fire hole 2 is opened in the side wall of the first layer body 11 along the circumferential direction, and the remaining fire holes 2 are opened in the side wall of the second layer body 12; in the height direction, the projection of the second layer body 12 covers the projection of the first layer body 11, and the air outlet of the air supply channel 3 is opened at the top of the second layer body 12 and surrounds the outside of the first layer body 11.

[0038] Based on the above embodiments, in this embodiment, the first layer 11 and the second layer 12 are integrally formed. The inner diameter of the first layer 11 is smaller than the inner diameter of the second layer 12. The air outlet of the air supply channel 3 is opened at the top of the second layer 12 and surrounds the outer side of the first layer 11. The air outlet of the air supply channel 3 is close to the highest fire outlet 2 and is aligned with the root of the flame ejected from the highest fire outlet 2.

[0039] As an optional embodiment, the inner fire cover also includes a guide groove 4, which is recessed downward and formed on the top of the second layer 12. The guide groove 4 surrounds the outside of the first layer 11, and the air outlet of the air supply channel 3 is connected to the guide groove 4.

[0040] Based on the above-mentioned embodiment, in this embodiment, the inner fire cover includes four air supply channels 3, which are evenly distributed along the circumference. The air outlets of the air supply channels 3 are opened in the guide grooves 4, and the air flowing out of the air outlets of the air supply channels 3 flows along the guide grooves 4 to replenish air to all the highest fire outlets 2.

[0041] As an optional embodiment, the fire hole 2 includes a first fire hole 21, a second fire hole 22 and a third fire hole 23 with decreasing heights; the first fire hole 21 is opened in the first layer 11, and the second fire hole 22 and the third fire hole 23 are both opened circumferentially on the side wall of the second layer 12; the aperture of the first fire hole 21 is smaller than the aperture of the second fire hole 22, and the aperture of the second fire hole 22 is smaller than or equal to the aperture of the third fire hole 23.

[0042] Based on the above embodiments, in this embodiment, the gas flows into the accommodating cavity from the bottom of the inner pot cover and flows from bottom to top, and the combustion pressure is gradually reduced. Combined with the aperture relationship of the first fire outlet 21, the second fire outlet 22 and the third fire outlet 23, the flame height formed by the first fire outlet 21 is less than the flame height formed by the second fire outlet 22, and the flame height formed by the second fire outlet 22 is less than or equal to the flame height formed by the third fire outlet 23. Three-dimensional flame layers of different heights are presented on the bottom of the pot, avoiding the appearance of a fire wall.

[0043] As an optional implementation, the second ignition hole 22 and the third ignition hole 23 are staggered with each other in the height direction.

[0044] By adopting the above scheme, the uniformity of the flame around the inner fire cover can be improved.

[0045] As an optional embodiment, the inner fire cover further includes a flame stabilizing groove 5 and a flame stabilizing hole 6 opened in the flame stabilizing groove 5 ; in the height direction, the flame stabilizing groove 5 is opened between the second fire outlet hole 22 and the third fire outlet hole 23 .

[0046] Based on the aforementioned embodiments, in this embodiment, a gas supplementary channel is opened in the flame stabilizing groove 5 to connect the inner and outer sides of the inner fire cover. The gas in the inner fire cover flows from the gas supplementary channel to the flame stabilizing groove 5, thereby supplementing the gas to the vicinity of the nearby fire holes to prevent the flame from separating.

[0047] As an optional implementation, the cross section of the guide groove 4 in the height direction is narrow at the bottom and wide at the top.

[0048] By adopting the above scheme, air diffusion can be achieved and the air supply effect can be improved.

[0049] In some embodiments, the cross-section of the guide groove 4 in the height direction is trapezoidal, irregular, etc.

[0050] As an optional implementation, the cross section of the guide groove 4 in the height direction is V-shaped.

[0051] The above solution is adopted to facilitate the processing of the guide groove 4. The air outlet of the air supply channel 3 is opened at the bottom of the V shape.

[0052] As an optional embodiment, the inner fire cover also includes an annular groove 7; the opening of the annular groove 7 faces outward; in the height direction, the annular groove 7 is lower than the lowest fire hole 2, and the air inlet of the air supply channel 3 is opened in the annular groove 7; the transverse cross-sectional area of ​​the air supply channel 3 is smaller than the longitudinal cross-sectional area of ​​the annular groove 7, and is also smaller than the longitudinal cross-sectional area of ​​the guide groove 4.

[0053] Based on the above embodiments, in this embodiment, the transverse cross section of the air supply channel 3 is circular, and the longitudinal cross section of the annular groove 7 is rectangular or trapezoidal. If it is a trapezoid, the large end of the trapezoid is outside and the small end is inside. The longitudinal cross section of the guide groove 4 is V-shaped. Through the above cross-sectional area size relationship, a throttling expansion effect is generated to further improve the combustion effect.

[0054] Based on the same inventive concept, an embodiment of the present application provides a burner, comprising the inner fire cover of any one of the aforementioned embodiments.

[0055] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0056] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0057] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0058] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0059] The above description is only a partial implementation method of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. An inner fire cover, characterized in that: include: The cover body (1) is provided with a plurality of groups of fire outlet holes (2) at different heights; The cover body (1) has an air supply channel (3) extending in the height direction, and an air outlet of the air supply channel (3) is located between the highest fire outlet hole (2) and the second highest fire outlet hole (2).

2. The inner fire cover according to claim 1, characterized in that: The cover body (1) comprises a first layer body (11) and a second layer body (12) which are cylindrical and arranged in sequence from high to low along the height direction; The highest fire outlet hole (2) is opened on the side wall of the first layer (11) along the circumferential direction, and the remaining fire outlet holes (2) are opened on the side wall of the second layer (12); in the height direction, the projection of the second layer (12) covers the projection of the first layer (11), and the air outlet of the air supply channel (3) is opened on the top of the second layer (12) and surrounds the outside of the first layer (11).

3. The inner fire cover according to claim 2, characterized in that: Also includes: A guide groove (4) is formed on the top of the second layer (12) and is concave downwards. The guide groove (4) surrounds the outside of the first layer (11). The air outlet of the air supply channel (3) is connected to the guide groove (4).

4. The inner fire cover according to claim 2, characterized in that: The fire outlet holes (2) include a first fire outlet hole (21), a second fire outlet hole (22) and a third fire outlet hole (23) whose heights are successively reduced; the first fire outlet hole (21) is opened on the first layer (11), and the second fire outlet hole (22) and the third fire outlet hole (23) are both opened on the side wall of the second layer (12) along the circumferential direction; The aperture of the first fire outlet hole (21) is smaller than the aperture of the second fire outlet hole (22), and the aperture of the second fire outlet hole (22) is smaller than or equal to the aperture of the third fire outlet hole (23).

5. The inner fire cover according to claim 4, characterized in that: The second fire outlet hole (22) and the third fire outlet hole (23) are staggered with each other in the height direction.

6. The inner fire cover according to claim 5, characterized in that: It also includes a flame stabilizing groove (5) and a flame stabilizing hole (6) opened in the flame stabilizing groove (5); In the height direction, the flame stabilizing groove (5) is arranged between the second fire outlet hole (22) and the third fire outlet hole (23).

7. The inner fire cover according to claim 3, characterized in that: The cross section of the guide groove (4) in the height direction is narrow at the bottom and wide at the top.

8. The inner fire cover according to claim 7, characterized in that: The cross section of the guide groove (4) in the height direction is V-shaped.

9. The inner fire cover according to claim 3, characterized in that: Also includes an annular groove (7); The opening of the annular groove (7) faces outward; in the height direction, the annular groove (7) is lower than the lowest fire outlet hole (2), and the air inlet of the air supply channel (3) is opened in the annular groove (7); The transverse cross-sectional area of ​​the air supply channel (3) is smaller than the longitudinal cross-sectional area of ​​the annular groove (7), and is also smaller than the longitudinal cross-sectional area of ​​the guide groove (4).

10. A burner, characterized in that: include: The inner fire cover as claimed in any one of claims 1 to 9.

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