Combustor and gas stove

Abstract

The utility model discloses a combustor and a gas stove, the combustor comprises a fire distributor and a plurality of groups of turbulent flow structures, an air supplementing channel is formed in the fire distributor and used for providing secondary air, and an air inlet communicating with the air supplementing channel is formed in the bottom of the fire distributor; the multiple groups of turbulent flow structures are distributed in the circumferential direction of the fire distributor at intervals and located on the periphery of the air inlet, each group of turbulent flow structures is arranged on the lower surface of the fire distributor, and the turbulent flow structures are used for disturbing secondary air passing through the bottom of the fire distributor so that at least part of the secondary air can form turbulent flow; therefore, the contact time of the secondary air and the surface of the fire distributor is prolonged, and the secondary air is fully preheated.

Description

Technical Field

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

[0002] As an important part of a cooking appliance, a burner usually includes a burner head. The burner head has an outer annular seat and an inner annular seat. An air inlet channel is directly formed between the outer wall of the inner annular seat and the inner wall of the outer annular seat to provide secondary air required during the combustion process for a central burner cap.

[0003] However, since the secondary air is provided by outside air, the temperature of the outside air, which is relatively low, is supplemented into the burner, resulting in a decrease in the temperature of the flame of the burner. Summary of the Utility Model

[0004] An embodiment of the present application provides a burner and a gas stove, which can extend the contact time between the secondary air and the burner head so that the burner head can fully preheat the secondary air.

[0005] In a first aspect, an embodiment of the present application provides a burner, which includes a burner head and multiple groups of flow disturbing structures. An air supplement channel is formed inside the burner head. The air supplement channel is used to provide secondary air, and an air inlet communicating with the air supplement channel is arranged at the bottom of the burner head; the multiple groups of flow disturbing structures are circumferentially spaced apart along the burner head and are located on the outer periphery of the air inlet. Each group of flow disturbing structures is arranged on the lower surface of the burner head, and the flow disturbing structures are used to disturb the secondary air passing through the bottom of the burner head so that at least part of the secondary air forms a turbulent flow.

[0006] Based on the burner of the embodiment of the present application, the gas is discharged from the upper surface of the burner head and burns above the burner head, creating a negative pressure above the burner head. When the outside air performs secondary air supplement to the burner, the outside air passes through the bottom of the burner head and the flow disturbing structures arranged at the bottom of the burner head. The flow disturbing structures disturb the air passing through the bottom of the burner head to make at least part of the air form a turbulent flow, so as to extend the contact time between the air and the bottom of the burner head, and further heat the air passing through the bottom of the burner head to a higher temperature by the burner head, ensuring the temperature of the flame of the burner; on the other hand, the flow disturbing structures increase the contact area between the burner and the air passing through the bottom of the burner head, that is, the flow disturbing structures can also heat the air passing through the bottom of the burner head, further ensuring the temperature of the flame of the burner.

[0007] In some embodiments of the present application, each group of flow disturbing structures includes a first flow disturbing piece and a second flow disturbing piece. Both the first flow disturbing piece and the second flow disturbing piece extend from the outer peripheral side to the inner peripheral side of the burner head, and the distance between the first flow disturbing piece and the second flow disturbing piece in the same group of flow disturbing structures gradually increases.

[0008] Based on the above embodiments, after the first spoiler and the second spoiler cause the air passing through the bottom of the fuel divider to generate turbulence, more small vortices will be formed in the turbulent air. To ensure the existence time of the small vortices, the distance between the first spoiler and the second spoiler gradually increases, so as to reduce the number of small vortices dissipated by colliding with the first spoiler and the second spoiler during the flow process, thereby ensuring the preheating effect of the burner on the air passing through the bottom of the fuel divider.

[0009] In some embodiments of the present application, the ratio of the maximum distance to the minimum distance between the first spoiler and the second spoiler is greater than or equal to 1.5 and less than or equal to 3.

[0010] Based on the above embodiments, within this range, it is possible to reduce the number of small vortices dissipated by colliding with the first spoiler and the second spoiler during the flow process, and at the same time ensure the air flow velocity between the first spoiler and the second spoiler in the same set of spoiler structures (according to the Venturi effect, which is manifested as the fluid velocity increasing when the restricted flow passes through a reduced cross-sectional area; conversely, the fluid velocity decreases when the restricted flow passes through an enlarged cross-sectional area).

[0011] In some embodiments of the present application, the first spoiler and the second spoiler are made of a material with a specific heat capacity less than or equal to 0.46×10^3 J / (kg·°C).

[0012] Based on the above embodiments, the smaller the specific heat capacity of an object, the faster the object heats up and cools down. The specific heat capacities of the first spoiler and the second spoiler are less than or equal to 0.46×10^3 J / (kg·°C), so as to ensure that the first spoiler and the second spoiler have a faster heating rate and can quickly transfer the temperature to the air passing through the bottom of the fuel divider when encountering colder air, so that the air passing through the bottom of the fuel divider can be quickly heated up.

[0013] In some embodiments of the present application, both the first spoiler and the second spoiler are configured as arc-shaped structures, and the first spoiler and the second spoiler protrude away from each other; or,

[0014] Both the first spoiler and the second spoiler are configured as arc-shaped structures, and the first spoiler and the second spoiler protrude towards each other.

[0015] Based on the above embodiments, when the first spoiler and the second spoiler have a spoiler effect, the first spoiler, the second spoiler and the air passing through the bottom of the fuel divider also have a larger contact area.

[0016] In some embodiments of the present application, the distance between the first spoiler and the second spoiler linearly increases from the outer peripheral side to the inner peripheral side of the distributor.

[0017] Based on the above embodiments, the structures of the first spoiler and the second spoiler are simple, and the air passing through the bottom of the distributor is less obstructed.

[0018] In some embodiments of the present application, an included angle is provided between the extending direction of the first spoiler and the extending direction of the second spoiler, the included angle is greater than or equal to 40° and less than or equal to 90°.

[0019] Based on the above embodiments, the included angle between the extending direction of the first spoiler and the extending direction of the second spoiler represents the changing trend of the distance between the first spoiler and the second spoiler, that is, the larger the included angle between the two, the faster the distance between the two will increase. Within this range, the distance between the first spoiler and the second spoiler can gradually increase to prevent the influence of the first spoiler and the second spoiler on small vortices in the air.

[0020] In some embodiments of the present application, the distributor includes:

[0021] A fire distribution inner ring, an inner gas channel is provided inside the fire distribution inner ring, and inner fire holes communicating with the inner gas channel are provided on the fire distribution inner ring;

[0022] A fire distribution outer ring, which is arranged around the fire distribution inner ring. An outer gas channel is provided inside the fire distribution outer ring. Outer fire holes communicating with the outer gas channel are provided on the fire distribution outer ring. The air supplement channel is located between the outer gas channel and the inner gas channel;

[0023] The first spoiler and the second spoiler are fixed to the lower surface of the fire distribution outer ring.

[0024] Based on the above embodiments, air passes through the fire distribution outer ring and multiple groups of spoiler structures provided at the bottom of the fire distribution outer ring. After being heated by the fire distribution outer ring and the spoiler structures, the air enters the air supplement channel between the fire distribution outer ring and the fire distribution inner ring through the air inlet to complete secondary air supplement for the burner.

[0025] In some embodiments of the present application, the distributor further includes:

[0026] Multiple heat exchange parts, the multiple heat exchange parts are located between the fire distribution inner ring and the fire distribution outer ring, and are respectively connected to the outer peripheral side of the fire distribution inner ring or the inner peripheral side of the fire distribution outer ring.

[0027] Based on the above embodiments, the multiple heat exchange parts can further heat the air entering the air supplement channel to further ensure the flame temperature of the burner.

[0028] In a second aspect, an embodiment of the present application provides a gas stove, which includes the burner described above.

[0029] Based on the gas stove in the embodiment of the present application, due to the above burner, the burner can preheat the air for secondary air supply to ensure the temperature of the burner flame.

[0030] Based on the burner and the gas stove of the embodiment of the present application, the gas is discharged from the upper surface of the burner and then burns above the burner, creating a negative pressure above the burner. When the outside air performs secondary air supply to the burner, the outside air passes through the bottom of the burner and the flow disturbing structure provided at the bottom of the burner. The flow disturbing structure disturbs the air passing through the bottom of the burner to make at least part of the air form a turbulent flow, so as to extend the contact time between the air and the bottom of the burner, and further heat the air passing through the bottom of the burner to a higher temperature by the burner, ensuring the temperature of the burner flame; on the other hand, the flow disturbing structure increases the contact area between the burner and the air passing through the bottom of the burner, that is, the flow disturbing structure can also heat the air passing through the bottom of the burner, further ensuring the temperature of the burner flame. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0032] Figure 1 is a schematic structural diagram of a burner in an embodiment of the present application;

[0033] Figure 2 is Figure 1 a top view of the burner shown;

[0034] Figure 3 is Figure 1 a bottom view of the burner shown;

[0035] Figure 4 is Figure 2 a schematic cross-sectional structural diagram of the burner shown along the A-A section.

[0036] Reference numerals: 10, burner; 11, air supply channel; 12, air inlet; 13, inner burner ring; 131, inner gas channel; 132, inner flame holes; 14, outer burner ring; 141, outer gas channel; 142, outer flame holes; 15, heat exchange part; 20, flow disturbing structure; 21, first flow disturbing fin; 22, second flow disturbing fin. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] In order to make the objectives, technical solutions and advantages of the present application more clear and understandable, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0038] As an important component of a cooking appliance, a burner generally includes a burner head. The burner head has an outer annular seat and an inner annular seat. A direct air inlet channel is formed between the outer wall of the inner annular seat and the inner wall of the outer annular seat to provide secondary air required during the combustion process for the central burner cap.

[0039] However, since the secondary air is provided by external air, the temperature of the external air with a lower temperature will cause the temperature of the flame of the burner to decrease after being supplemented into the burner.

[0040] To solve the above technical problem, please refer to Figures 1 to 3 As shown, a first aspect of the present application provides a burner, which can extend the contact time between the secondary air and the burner head 10, so that the burner head 10 can fully preheat the secondary air.

[0041] Please refer to Figures 1 to 3 As shown, the burner includes a burner head 10 and multiple groups of flow disturbing structures 20. An air supplement channel 11 is formed inside the burner head 10. The air supplement channel 11 is used to provide secondary air. An air inlet 12 communicating with the air supplement channel 11 is arranged at the bottom of the burner head 10; the multiple groups of flow disturbing structures 20 are circumferentially spaced along the burner head 10 and are located on the outer periphery of the air inlet 12. Each group of flow disturbing structures 20 is arranged on the lower surface of the burner head 10. The flow disturbing structures 20 are used to disturb the secondary air passing through the bottom of the burner head 10, so that at least part of the secondary air forms a turbulent flow.

[0042] Based on the burner of the embodiment of the present application, the fuel gas is discharged from the upper surface of the burner head 10 and burns above the burner head 10, creating a negative pressure above the burner head 10. When the external air performs secondary air supplement to the burner, the external air passes through the bottom of the burner head 10 and the flow disturbing structures 20 arranged at the bottom of the burner head 10. The flow disturbing structures 20 disturb the air passing through the bottom of the burner head 10 to make at least part of the air form a turbulent flow, so as to extend the contact time between the air and the bottom of the burner head 10. Furthermore, the air passing through the bottom of the burner head 10 is heated to a higher temperature by the burner head 10, ensuring the temperature of the flame of the burner; on the other hand, the flow disturbing structures 20 increase the contact area between the burner and the air passing through the bottom of the burner head 10, that is, the flow disturbing structures 20 can also heat the air passing through the bottom of the burner head 10, further ensuring the temperature of the flame of the burner.

[0043] Among them, turbulent flow, also known as turbulence, is a flow state of a fluid. When the fluid velocity is very small, the fluid flows in layers without mixing, which is called laminar flow; as the fluid velocity gradually increases, the streamlines of the fluid begin to show wavy oscillations, and the frequency and amplitude of the oscillations increase with the increase of the fluid velocity. This flow condition is called transitional flow; when the fluid velocity increases to a very large value, the streamlines are no longer clearly distinguishable, and there are many small vortices in the flow field, which is called turbulent flow, also known as chaotic flow, disturbing flow or turbulent flow.

[0044] Please refer to Figure 3 As shown, in some embodiments of the present application, each group of turbulence generating structures 20 includes a first turbulence generating fin 21 and a second turbulence generating fin 22. Both the first turbulence generating fin 21 and the second turbulence generating fin 22 are located from the outer peripheral side of the fuel distributor 10 to the inner peripheral side of the fuel distributor 10, and the distance between the first turbulence generating fin 21 and the second turbulence generating fin 22 in the same group of turbulence generating structures 20 gradually increases.

[0045] After the first turbulence generating fin 21 and the second turbulence generating fin 22 cause the air passing through the bottom of the fuel distributor 10 to generate turbulent flow, more small vortices will be formed in the turbulent air. To ensure the existence time of the small vortices, the distance between the first turbulence generating fin 21 and the second turbulence generating fin 22 gradually increases, so as to reduce the number of small vortices dissipated by colliding with the first turbulence generating fin 21 and the second turbulence generating fin 22 during the flow process, and thus ensure the preheating effect of the burner on the air passing through the bottom of the fuel distributor 10.

[0046] In some embodiments of the present application, the ratio of the maximum distance to the minimum distance between the first turbulence generating fin 21 and the second turbulence generating fin 22 is greater than or equal to 1.5 and less than or equal to 3. For example, 1.8, 2.0, 2.2, 2.4, 2.6 or 2.8, etc. Within this range, it is possible to reduce the number of small vortices dissipated by colliding with the first turbulence generating fin 21 and the second turbulence generating fin 22 during the flow process, and at the same time ensure the fluid velocity of the air between the first turbulence generating fin 21 and the second turbulence generating fin 22 in the same group of turbulence generating structures 20 (according to the Venturi effect, which is manifested as the fluid velocity increasing when the restricted flow passes through a reduced cross-section of the flow-through area; conversely, the fluid velocity decreases when the restricted flow passes through an enlarged cross-section of the flow-through area).

[0047] In some embodiments of the present application, the first turbulence generating fin 21 and the second turbulence generating fin 22 are made of a material with a specific heat capacity less than or equal to 0.46×10^3 J / (kg·℃), such as copper or cast iron. Among them, the specific heat capacity of copper is 0.39×10^3 J / (kg·℃), and copper has good high-temperature resistance; the specific heat capacity of cast iron is 0.46×10^3 J / (kg·℃), and cast iron is inexpensive.

[0048] Specific heat capacity is the heat capacity of a unit mass of a substance, that is, the amount of heat absorbed or released when a unit mass of an object changes its unit temperature. The smaller the specific heat capacity of an object, the faster the object heats up and cools down. The specific heat capacities of the first spoiler 21 and the second spoiler 22 are less than or equal to 0.46×10^3 J / (kg·℃), which ensures that the first spoiler 21 and the second spoiler 22 have a relatively fast heating rate, and can quickly transfer the temperature to the air passing through the bottom of the flame divider 10 when encountering air with a lower temperature, so that the air passing through the bottom of the flame divider 10 can be quickly heated up.

[0049] In some embodiments of the present application, both the first spoiler 21 and the second spoiler 22 are configured as arc-shaped structures, and the first spoiler 21 and the second spoiler 22 protrude away from each other; when the first spoiler 21 and the second spoiler 22 have a spoiler effect, the first spoiler 21 and the second spoiler 22 and the air passing through the bottom of the flame divider 10 also have a larger contact area.

[0050] In some other embodiments of the present application, both the first spoiler 21 and the second spoiler 22 are configured as arc-shaped structures, and the first spoiler 21 and the second spoiler 22 protrude relative to each other. Similarly, the first spoiler 21 and the second spoiler 22 and the air passing through the bottom of the flame divider 10 also have a larger contact area.

[0051] In some embodiments of the present application, the distance between the first spoiler 21 and the second spoiler 22 linearly increases from the outer peripheral side to the inner peripheral side of the flame divider 10. The structures of the first spoiler 21 and the second spoiler 22 are simple, and the air passing through the bottom of the flame divider is less obstructed.

[0052] In some embodiments of the present application, an angle is provided between the extending direction of the first spoiler 21 and the extending direction of the second spoiler 22, and the angle is greater than or equal to 40° and less than or equal to 90°, for example, 50°, 60°, 70° or 80°, etc.

[0053] The angle between the extending direction of the first spoiler 21 and the extending direction of the second spoiler 22 represents the change trend of the distance between the first spoiler 21 and the second spoiler 22, that is, the larger the angle between the two, the faster the distance between the two will increase. Within this range, the distance between the first spoiler 21 and the second spoiler 22 can gradually increase to prevent the influence of the first spoiler 21 and the second spoiler 22 on small vortices in the air.

[0054] The flame divider 10 is used to divide the flame of the burner into inner and outer flames. Please refer to Figure 3 and Figure 4As shown, in some embodiments of the present application, the flame distributor 10 includes an inner flame-distributing ring 13 and an outer flame-distributing ring 14. An inner gas channel 131 is provided inside the inner flame-distributing ring 13. The inner flame-distributing ring 13 is provided with inner flame holes 132 communicating with the inner gas channel 131. The outer flame-distributing ring 14 is arranged around the inner flame-distributing ring 13. An outer gas channel 141 is provided inside the outer flame-distributing ring 14. The outer flame-distributing ring 14 is provided with outer flame holes 142 communicating with the outer gas channel 141. The air supplement channel 11 is located between the outer gas channel 141 and the inner gas channel 131. The flow disturbance structure 20 is fixed to the lower surface of the outer flame-distributing ring 14.

[0055] The gas flows through the inner gas channel 131 and the inner flame holes 132 to the upper part of the inner flame-distributing ring 13 and burns. It can be understood that the number of the inner flame holes 132 is multiple, and the multiple inner flame holes 132 are evenly distributed along the circumferential direction of the inner flame-distributing ring 13 so that the inner flame-distributing ring 13 generates a uniform flame to enable the cookware to be heated evenly. Similarly, the gas flows through the inner gas channel 131 and the outer flame holes 142 to the upper part of the outer flame-distributing ring 14 and burns. It can be understood that the number of the outer flame holes 142 is multiple, and the multiple outer flame holes 142 are evenly distributed along the circumferential direction of the outer flame-distributing ring 14 so that the outer flame-distributing ring 14 generates a uniform flame to enable the cookware to be heated evenly.

[0056] In some embodiments of the present application, the flame distributor 10 further includes a plurality of heat exchange parts 15. The plurality of heat exchange parts 15 are located between the inner flame-distributing ring 13 and the outer flame-distributing ring 14 and are respectively connected to the outer peripheral side of the inner flame-distributing ring 13 and / or the inner peripheral side of the outer flame-distributing ring 14. The plurality of heat exchange parts 15 can further heat the air entering the air supplement channel 11 to further ensure the flame temperature of the burner.

[0057] In the embodiments of the present application, the shape of the heat exchange part 15 is not limited. The heat exchange part 15 can be a plurality of convex blocks protruding on the outer peripheral side of the inner flame-distributing ring 13 or the inner peripheral side of the outer flame-distributing ring 14, or can be other shapes. Please refer to Figure 3 and Figure 4 As shown, in some embodiments of the present application, the heat exchange part 15 can be connected to both the inner flame-distributing ring 13 and the outer flame-distributing ring 14 to fixedly connect the inner flame-distributing ring 13 and the outer flame-distributing ring 14. At this time, the heat exchange part 15 can not only heat the air passing through the air supplement channel 11, but also realize the fixed connection between the inner flame-distributing ring 13 and the outer flame-distributing ring 14.

[0058] In a second aspect, an embodiment of the present application provides a gas stove, and the gas stove includes the above burner.

[0059] Based on the gas stove in the embodiments of the present application, due to having the above burner, the burner can preheat the air for secondary air supplement to ensure the temperature of the burner flame.

[0060] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of the present application, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings. This is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the accompanying drawings are only for illustrative purposes and cannot be construed as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0061] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A burner, characterized in that: include: A fire distributor, wherein an air supply channel is formed inside the fire distributor, and the air supply channel is used to provide secondary air, and an air inlet communicating with the air supply channel is provided at the bottom of the fire distributor; as well as A plurality of groups of spoiler structures are spaced apart along the circumference of the igniter and are located at the periphery of the air inlet, each group of the spoiler structures is arranged on the lower surface of the igniter, and the spoiler structures are used to disturb the secondary air passing through the bottom of the igniter so that at least part of the secondary air forms turbulent flow.

2. The burner according to claim 1, characterized in that Each group of the spoiler structures includes a first spoiler and a second spoiler, and the first spoiler and the second spoiler both extend from the outer peripheral side of the fire divider to the inner peripheral side of the fire divider; and in the direction from the outer peripheral side to the inner peripheral side of the fire divider, the distance between the first spoiler and the second spoiler in the same group of the spoiler structures gradually increases.

3. The burner according to claim 2, characterized in that A ratio of a maximum distance to a minimum distance between the first spoiler and the second spoiler is greater than or equal to 1.5 and less than or equal to 3.

4. The burner according to claim 2, characterized in that The specific heat capacity of the first spoiler and the second spoiler is less than or equal to 0.46×10^3 J / (kg·℃).

5. The burner according to claim 2, characterized in that The first spoiler and the second spoiler are both configured as arc-shaped structures, and the first spoiler and the second spoiler are arranged to protrude in opposite directions; or, The first spoiler and the second spoiler are both configured as arc-shaped structures, and the first spoiler and the second spoiler are relatively protruding.

6. The burner according to claim 2, characterized in that The distance between the first spoiler and the second spoiler increases linearly from the outer peripheral side of the diffuser to the inner peripheral side of the diffuser.

7. The burner according to claim 6, characterized in that An extending direction of the first spoiler and an extending direction of the second spoiler form an angle therebetween, and the angle is greater than or equal to 40° and less than or equal to 90°.

8. The burner according to any one of claims 2 to 7, characterized in that: The fire distributor comprises: A fire dividing inner ring, wherein an internal gas channel is provided inside the fire dividing inner ring, and the fire dividing inner ring is provided with an internal fire hole communicating with the internal gas channel; A fire separation outer ring is arranged around the fire separation inner ring, an external gas channel is arranged inside the fire separation outer ring, the fire separation outer ring is provided with an external fire hole communicating with the external gas channel, and the gas supplement channel is located between the external gas channel and the internal gas channel; The first spoiler and the second spoiler are fixed to the lower surface of the ignition dividing outer ring.

9. The burner according to claim 8, characterized in that The fire distributor also includes: A plurality of heat exchange parts are located between the ignition dividing inner ring and the ignition dividing outer ring and are respectively connected to the outer peripheral side of the ignition dividing inner ring or the inner peripheral side of the ignition dividing outer ring.

10. A gas stove, characterized in that: include: A burner as claimed in any one of claims 1 to 9.

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