Distributor, stove burner and gas stove

Abstract

The distributor comprises an inner ring part, an outer ring part, a gas flow channel and a secondary air flow channel, the inner ring part and the outer ring part are arranged in a spaced mode, the gas flow channel and the secondary air flow channel which are independent of each other are formed between the inner ring part and the outer ring part, the gas flow channel extends in the radial direction and communicates with the outer ring part, and the secondary air flow channel extends in the radial direction and communicates with the outer ring part; the width-to-height ratio W / H of the fuel gas flow channel is 0.7-0.9, and the occupied area of the fuel gas flow channel in the circumferential direction is 0.3-0.4 times of the area of the gap between the inner ring part and the outer ring part in the circumferential direction. Therefore, compared with the prior art, the width of the fuel gas flow channel is reduced, the depth of the fuel gas flow channel is increased, the space occupation of the fuel gas flow channel in the circumferential direction can be reduced on the premise that sufficient fuel gas flow is ensured, more space is provided for the secondary air flow channel, the flowing area of secondary air can be increased, and the combustion efficiency is improved. Therefore, the supplementary amount of secondary air is increased, the secondary air can be sufficiently supplemented, complete combustion of fuel gas is promoted, and the heat efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen appliances, and in particular, to a flame divider, a stove burner, and a gas stove. Background Art

[0002] Gas stoves are essential kitchen cooking appliances for daily household use. The structure of the stove burner directly affects the performance of the gas stove.

[0003] Most of the flame dividers of the existing stove burners on the market are double-ring flame dividers. In order to make the combustion more complete, secondary air needs to be supplemented to the double-ring stove burner. In the prior art, a secondary air flow channel for supplementing air is usually provided between the double rings. A gas flow channel is also provided between the double rings of the flame divider. The setting of the gas flow channel occupies a relatively large space, reducing the space of the secondary air flow channel and the amount of supplemented secondary air, resulting in incomplete combustion of the gas and a reduction in the thermal efficiency of the stove. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. For this purpose, an object of the present invention is to provide a flame divider, which increases the depth of the gas flow channel and reduces its width, increases the flow area of the secondary air, and can increase the amount of supplemented secondary air to promote complete combustion of the gas.

[0005] A second aspect of the present invention provides a stove burner using the above flame divider.

[0006] A third aspect of the present invention provides a gas stove using the above stove burner.

[0007] The flame divider according to an embodiment of the present invention includes: an inner ring portion, an outer ring portion, a gas flow channel, and a secondary air flow channel. The inner ring portion and the outer ring portion are spaced apart, and an independent gas flow channel and secondary air flow channel are formed therebetween. The gas flow channel extends radially and communicates with the outer ring portion. The aspect ratio W / H of the gas flow channel is between 0.7 and 0.9. The occupied area of the gas flow channel in the circumferential direction is 0.3 to 0.4 times the area of the gap between the inner ring portion and the outer ring portion in the circumferential direction.

[0008] The burner head according to the embodiment of the present invention has a simple structure and is convenient to set. A gas flow channel and a secondary air flow channel are provided between the inner ring part and the outer ring part of the present application. Compared with the prior art, the width of the gas flow channel in the present application is reduced, and the depth of the gas flow channel is increased, making it narrower in width compared with the gas flow channel in the prior art, and making its depth deeper compared with the depth of the gas flow channel in the prior art. It can reduce the space occupied by the gas flow channel in the circumferential direction on the premise of ensuring sufficient gas flow, thereby providing more space for the secondary air flow channel, increasing the flow area of the secondary air, further increasing the supplement amount of the secondary air, being able to sufficiently supplement the secondary air, promoting the complete combustion of the gas, and improving the thermal efficiency.

[0009] In some embodiments, the gas flow channel has a guiding surface arranged obliquely, and the guiding surface extends upward and towards the outer wall of the outer ring part to be connected to the bottom end of the outer wall of the outer ring part. In this way, by setting the guiding surface, the flow direction of the gas in the gas flow channel can be changed, playing a guiding role, and being able to buffer the gas, reducing the impact force of the gas flowing onto the outer wall of the outer ring part.

[0010] In some embodiments, the bottom surface of the gas flow channel is lower than the bottom end of the outer wall of the outer ring part, and both ends of the bottom surface are respectively connected to the outer wall of the inner ring part and the guiding surface. Such a setting facilitates increasing the depth of the gas flow channel.

[0011] In some embodiments, the depth difference between the bottom surface and the bottom end of the outer wall of the outer ring part is H, and 1mm ≤ H ≤ 7mm. Setting the depth difference between the two within this range can ensure reasonable space occupation, avoid interfering with other components, and can keep the gas flow area and gas flow velocity approximately constant, so as to keep the gas flow rate constant and ensure smooth gas flow.

[0012] In some embodiments, the extension line of the guiding surface and the bottom surface form an included angle α, and 5° ≤ α ≤ 30°. In this way, it can ensure that the inclination of the guiding surface is appropriate, ensure that the guiding surface can quickly change the flow direction of the gas in the gas flow channel, and can also buffer the gas, reducing the impact force of the gas on the outer wall of the outer ring part, thereby reducing the loss of impact kinetic energy and making the gas flow more smoothly.

[0013] In some embodiments, at least one surface of the gas flow channel is configured as an inclined surface, and the cross-sectional area of the end of the gas flow channel far from the outer ring part is larger than the cross-sectional area of the end of the gas flow channel close to the outer ring part. With such a setting, the cross-sectional area of the gas flow channel gradually decreases in the gas flow direction, making the gas flow velocity increase and the gas flow area decrease, ensuring that the gas flow rate is approximately constant, making the gas flow more smoothly, and being able to reduce the space occupied by the gas flow channel in the circumferential direction, and being able to provide more space for the secondary air flow channel.

[0014] In some embodiments, the roughness of the inner surface of the gas flow channel is less than that of the inner surface of the outer ring. In this way, by reducing the roughness of the inner surface of the gas flow channel, the flow resistance of the gas in the gas flow channel can be reduced, and the gas flow velocity can be increased.

[0015] In some embodiments, the connection between the gas flow channel and the outer ring part has a circular arc transition. Such a setting can guide the gas flow, facilitate the turning of the gas, enable the gas to flow from the gas flow channel to the two side channels at the connection between the gas flow channel and the outer ring part, and reduce the flow resistance.

[0016] The cooking burner according to an embodiment of the present invention includes: a burner head and the flame divider described in any one of the above embodiments. The flame divider is arranged above the burner head. The inner ring gas outlet of the burner head is communicated with the inner ring part, the outer ring gas outlet of the burner head is communicated with the gas flow channel, the burner head has a plurality of ejector tubes and a plurality of gas mixing chambers, each ejector tube corresponds to one gas mixing chamber, and the gas mixing chamber is communicated with the flame divider. In this way, the gas first enters the burner head for mixing and combustion in the burner head, and then enters the flame divider, which can further burn the gas, ensure complete combustion of the gas, and improve the thermal efficiency of the cooking burner.

[0017] The gas stove according to an embodiment of the present invention includes: a housing and the cooking burner described in any one of the above embodiments. This gas stove can effectively reduce flue gas and improve thermal efficiency.

[0018] The additional aspects and advantages of the present invention will be partly given in the following description, partly will become obvious from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0020] Figure 1 is a schematic structural diagram of a cooking burner according to an embodiment of the present invention;

[0021] Figure 2 is an exploded schematic diagram of a cooking burner according to an embodiment of the present invention;

[0022] Figure 3 is a cross-sectional view of a cooking burner according to an embodiment of the present invention;

[0023] Figure 4 is a cross-sectional view of a flame divider according to an embodiment of the present invention;

[0024] Figure 5 is a side view of a flame divider according to an embodiment of the present invention;

[0025] Figure 6 It is the other side view of the flame divider according to an embodiment of the present invention.

[0026] Reference numerals:

[0027] Cooker burner 1000,

[0028] Flame divider 100, burner head 200, outer ring fire cap 300, inner ring fire cap 400,

[0029] Inner ring part 10, outer ring part 20, outer wall 21,

[0030] Gas flow channel 30, guiding surface 31, bottom surface 32,

[0031] Secondary air flow channel 40,

[0032] Inner ring air outlet 210, outer ring air outlet 220,

[0033] Outer ring of burner head 230, outer ring ejector pipe 2301, outer ring mixing chamber 2302,

[0034] Inner ring of burner head 240, inner ring ejector pipe 2401, inner ring mixing chamber 2402. Detailed implementation manners

[0035] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0036] Reference is made below to Figures 1-6 Describe the flame divider 100, cooker burner and gas stove according to an embodiment of the present invention.

[0037] As Figures 2-6 shown, the flame divider 100 according to an embodiment of the present invention includes: an inner ring part 10, an outer ring part 20, a gas flow channel 30 and a secondary air flow channel 40. The inner ring part 10 and the outer ring part 20 are arranged at intervals, and an independent gas flow channel 30 and a secondary air flow channel 40 are formed therebetween. The gas flow channel 30 extends radially and communicates with the outer ring part 20. The aspect ratio W / H of the gas flow channel 30 is between 0.7 and 0.9. The occupied area of the gas flow channel 30 in the circumferential direction is 0.3 times to 0.4 times of the area of the gap between the inner ring part 10 and the outer ring part 20 in the circumferential direction.

[0038] Specifically, the inner ring part 10 and the outer ring part 20 are configured as hollow annular structures, both of which have channels, and the inner ring part 10 and the outer ring part 20 are concentrically arranged. The inner ring part 10 is located at the center of the burner 100, and the outer ring part 20 is located at the edge of the burner 100. A gap is formed between the inner ring part 10 and the outer ring part 20. At least one gas flow channel 30 and at least one secondary air flow channel 40 are formed in the gap. If a plurality of gas flow channels 30 are formed in the gap, the plurality of gas flow channels 30 are arranged at intervals, and a secondary air flow channel 40 that is open up and down is formed between adjacent gas flow channels 30. Exemplarily, if three gas flow channels 30 are formed in the gap, three secondary air flow channels 40 are formed in the gap; if four gas flow channels 30 are formed in the gap, four secondary air flow channels 40 are formed in the gap. The gas flow channel 30 is a radially extending channel, which is connected to the outer ring part 20 and communicates with the channel of the outer ring part 20. Except for the gas flow channel 30, the other areas between the inner ring part 10 and the outer ring part 20 are secondary air flow channels 40 for air circulation.

[0039] It should be noted that the gas flow rate is proportional to the gas flow velocity and the gas flow area, and the secondary air flow rate is proportional to the air flow velocity and the air flow area. On the premise of keeping the gas flow rate constant, increasing the secondary air flow rate can ensure sufficient supply of secondary air to promote the complete combustion of the gas. In the present invention, the flow area of the secondary air is increased to increase the secondary air flow rate.

[0040] The present invention increases the depth of the gas flow channel 30 and sets its depth to be greater than the depth of the outer ring part 20. Since the gas flow velocity remains constant, if the gas flow area is kept unchanged, the occupied area of the gas flow channel 30 in the axial direction (circumferential direction of the burner 100) can be reduced, that is, the width of the gas flow channel 30 is reduced. Since only the gas flow channel 30 and the secondary air flow channel 40 are provided in the gap between the inner ring part 10 and the outer ring part 20, reducing the width of the gas flow channel 30 can reduce the occupation of the secondary air flow channel 40 by the gas flow channel 30 in the circumferential direction, thereby increasing the flow area of the secondary air.

[0041] On the premise that the gas flow rate in the gas flow channel 30 is approximately constant, the width of the gas flow channel 30 is inversely proportional to its height. When reducing the width of the gas flow channel 30, to ensure sufficient gas flow rate, it is necessary to increase the depth of the gas flow channel 30, that is, the height of the gas flow channel 30. A plurality of independent gas flow channels 30 and a plurality of secondary air flow channels 40 are formed in the gap between the inner ring part 10 and the outer ring part 20. The occupied area of the plurality of gas flow channels 30 in the circumferential direction is 0.3 to 0.4 times the area of the gap between the two in the circumferential direction, and the width-to-height ratio W / H of the gas flow channel 30 is between 0.7 and 0.9. Setting the width-to-height ratio of the gas flow channel 30 and the occupied area of the plurality of gas flow channels 30 in the circumferential direction within the above two ranges can provide as much space as possible for the secondary air flow channel 40 on the premise of ensuring sufficient gas flow rate, so as to maximize the flow rate of the secondary air, thereby supplementing more secondary air.

[0042] The burner 100 according to the embodiment of the present invention has a simple structure and is convenient to set. The gas flow channel 30 and the secondary air flow channel 40 are arranged between the inner ring part 10 and the outer ring part 20 of the present application. Compared with the prior art, the width of the gas flow channel 30 in the present application is reduced, and the depth of the gas flow channel 30 is increased, making it narrower than the width of the gas flow channel in the prior art and deeper than the depth of the gas flow channel in the prior art. It can reduce the space occupied by the gas flow channel 30 in the circumferential direction on the premise of ensuring sufficient gas flow rate, thereby providing more space for the secondary air flow channel 40, increasing the flow area of the secondary air, and then increasing the supplement amount of the secondary air, being able to sufficiently supplement the secondary air, promoting the complete combustion of the gas, and improving the thermal efficiency.

[0043] In some embodiments, the gas flow channel 30 has a diversion surface 31 arranged obliquely, and the diversion surface 31 extends upward and toward the outer wall 21 of the outer ring part 20 to connect with the bottom end of the outer wall 21 of the outer ring part 20. The bottom surface 32 of the gas flow channel 30 is lower than the bottom end of the outer wall 21 of the outer ring part 20, and the two ends of the bottom surface 32 are respectively connected to the outer wall 21 of the inner ring part 10 and the diversion surface 31.

[0044] Specifically, a flow guiding surface 31 is connected between the bottom surface 32 of the gas flow channel 30 and the bottom end of the outer wall 21 of the outer ring portion 20. One end of the flow guiding surface 31 close to the inner ring portion 10 is connected to the bottom surface 32 of the gas flow channel 30, and the other end of the flow guiding surface 31 far from the inner ring portion 10 extends upward and outward to be connected to the bottom end of the outer wall 21 of the outer ring portion 20. The bottom surface 32 of the gas flow channel 30 is lower than the bottom end of the outer wall 21 of the outer ring portion 20. Compared with the prior art, the depth of the gas flow channel 30 is increased. Since the gas flow velocity remains constant, if the gas flow area is kept unchanged, the size of the projection profile of the gas flow channel 30 in the circumferential direction can be reduced, that is, the width of the gas flow channel 30 is reduced. Since only the gas flow channel 30 and the secondary air flow channel 40 are arranged in the gap between the inner ring portion 10 and the outer ring portion 20, reducing the width of the gas flow channel 30 can reduce the occupation of the secondary air flow channel 40 by the gas flow channel 30 in the circumferential direction, thereby increasing the flow area of the secondary air.

[0045] With such a setting, the bottom surface 32 of the gas flow channel 30 in the present invention is lower than the bottom end of the outer wall 21 of the outer ring portion 20. By arranging an inclined flow guiding surface 31 between the bottom surface 32 of the gas flow channel 30 and the bottom end of the outer wall 21 of the outer ring portion 20, the flow direction of the gas in the gas flow channel 30 can be changed, which plays a role in guiding the flow, and can buffer the gas, reducing the impact force of the gas flowing to the outer wall 21 of the outer ring portion 20. Compared with the prior art, the depth of the gas flow channel 30 in the present application is increased, the space occupation of the gas flow channel 30 in the circumferential direction is reduced, more space can be provided for the secondary air flow channel 40, thereby increasing the flow area of the secondary air and increasing the supplement amount of the secondary air.

[0046] As Figure 4 shown, specifically, the depth difference between the bottom surface 32 and the bottom end of the outer wall 21 of the outer ring portion 20 is H, and 1 mm ≤ H ≤ 7 mm.

[0047] Specifically, the bottom surface 32 of the gas flow channel 30 is lower than the bottom end of the outer wall 21 of the outer ring portion 20, and the depth difference therebetween is set within this range. Preferably, the depth difference is 3.5 mm, and the projected area of the gas flow channel 30 in the circumferential direction is reduced, and it is reduced to 85% - 95% of the area of the gas flow channel 30 in the prior art. Preferably, the projected area of the gas flow channel 30 in the circumferential direction is reduced by 10% relative to the area of the gas flow channel 30 in the prior art.

[0048] By setting it in this way, the depth of the gas flow channel 30 can be increased, thereby reducing its space occupation in the circumferential direction, and more space can be provided for the secondary air flow channel 40 to supplement the secondary air more sufficiently. Setting the depth difference between the gas flow channel 30 and the outer wall 21 of the outer ring part 20 and the width of the gas flow channel 30 within the above ranges can ensure reasonable space occupation, avoid interfering with other components, and can keep the gas flow area and gas flow velocity roughly constant, so as to keep the gas flow rate constant and ensure smooth gas flow.

[0049] As Figure 4 shown, further, the extension line of the guiding surface 31 and the bottom surface 32 form an included angle α, 5° ≤ α ≤ 30°.

[0050] It should be noted that setting the included angle between the extension line of the guiding surface 31 and the bottom surface 32 within this range can ensure that the inclination of the guiding surface 31 is moderate, ensure that the guiding surface 31 can quickly change the flow direction of the gas in the gas flow channel 30, and can also play a buffering role on the gas, reducing the impact force of the gas on the outer wall 21 of the outer ring part 20, thereby reducing the loss of impact kinetic energy and enabling the gas to flow more smoothly. The included angle between the extension line of the guiding surface 31 and the bottom surface 32 is preferably 18°, and the effect is the best.

[0051] If the included angle between the extension line of the guiding surface 31 and the bottom surface 32 is less than 5°, the inclination of the guiding surface 31 is small, and its buffering effect is limited, unable to effectively reduce the impact force of the gas on the outer wall 21 of the outer ring part 20, and unable to quickly and effectively change the flow direction of the gas. If the included angle between the extension line of the guiding surface 31 and the bottom surface 32 is greater than 30°, the inclination of the guiding surface 31 is large, and the loss of kinetic energy of the gas impact cannot be effectively reduced.

[0052] As Figure 5 shown, in some embodiments, at least one surface of the gas flow channel 30 is configured as an inclined surface, and the cross-sectional area of the end of the gas flow channel 30 far from the outer ring part 20 is larger than the cross-sectional area of the end of the gas flow channel 30 close to the outer ring part 20.

[0053] Specifically, the four surfaces of the gas flow channel 30 can be simultaneously configured as inclined surfaces, or only one surface, or two surfaces, or three surfaces can be configured as inclined surfaces. When the four surfaces are all configured as inclined surfaces, they respectively extend obliquely towards the opposite side, forming a tapered tube structure. The end of the gas flow channel 30 far from the outer ring part 20 is the inlet of the gas flow channel 30, and the end of the gas flow channel 30 close to the outer ring part 20 is the outlet of the gas flow channel 30. The cross-sectional area of the inlet is larger than the cross-sectional area of the outlet, and the gas flow channel 30 gradually shrinks from the inlet towards the outlet.

[0054] With such a setting, the cross-sectional area of the gas flow channel 30 gradually decreases in the gas flow direction, so that the gas flow velocity increases and the gas flow area decreases, ensuring that the gas flow rate is approximately constant, making the gas flow smoother, and being able to reduce the space occupied by the gas flow channel 30 in the circumferential direction, and being able to provide more space for the secondary air flow channel 40.

[0055] In addition, the angle between the side wall of the gas flow channel 30 constructed as an inclined plane and the radial direction is 1° to 10°, preferably 5°. Within this range, it can ensure that the gas flow rate is approximately constant.

[0056] Specifically, the connection between the gas flow channel 30 and the outer ring part 20 has a circular arc transition. Circular arcs are provided between the two side surfaces of the gas flow channel 30 and the inner wall of the outer ring part 20 to make the connection between the two smooth. With such a setting, it can guide the gas flow, facilitate the gas to turn, and make the gas flow from the gas flow channel 30 to the two side channels at the connection between the gas flow channel 30 and the outer ring part 20, reducing the flow resistance.

[0057] In some embodiments, the roughness of the inner surface of the gas flow channel 30 is less than the roughness of the inner surface of the outer ring 20.

[0058] Specifically, the roughness of the inner surface of the gas flow channel 30 is relatively low compared to the roughness of other surfaces of the burner 100. Specifically, the roughness of the inner surface of the gas flow channel 30 can be reduced by means such as precision machining, grinding and polishing, or coating or laminating on the inner surface of the gas flow channel 30. The roughness of the inner surface of the gas flow channel 30 is between Ra0.4 - Ra6.4, and the roughness is preferably Ra1.6. In addition, while reducing the roughness of the inner surface of the gas flow channel 30, the width of the gas flow channel 30 in the circumferential direction is reduced to 80% - 92% of its original area in the prior art, preferably reduced to 88% of the original area.

[0059] In this way, by reducing the roughness of the inner surface of the gas flow channel 30 and reducing its area, the flow resistance of the gas in the gas flow channel 30 can be reduced, so that the gas flow velocity increases and the gas flow area decreases. Setting the reduced width of the gas flow channel 30 in the circumferential direction within this range can ensure that the gas flow rate is approximately constant, and can reduce the occupation of the secondary air flow channel 40 by the gas flow channel 30 in the circumferential direction, increasing the flow area of the secondary air, thereby increasing the secondary air flow rate, realizing sufficient replenishment of the secondary air, and promoting complete combustion of the gas.

[0060] Such as Figures 1-3As shown, the cooking burner 1000 according to an embodiment of the present invention includes a burner head 200 and the sub-fire vent 100 in the above embodiment; the sub-fire vent 100 is disposed above the burner head 200. The inner-ring gas outlet 210 of the burner head 200 is communicated with the inner-ring part 10, and the outer-ring gas outlet 220 of the burner head 200 is communicated with the gas flow channel 30. The burner head 200 has a plurality of ejector tubes and a plurality of gas mixing chambers. Each ejector tube corresponds to a gas mixing chamber, and the gas mixing chamber is communicated with the sub-fire vent 100.

[0061] Specifically, the sub-fire vent 100 is installed on the top of the burner head 200. The burner head 200 has an inner-ring gas outlet 210 and an outer-ring gas outlet 220. The inner-ring gas outlet 210 is located at the center position of the burner head 200. The inner diameter of the outer-ring gas outlet 220 is larger than that of the inner-ring gas outlet 210. The inner-ring part 10 is correspondingly disposed above the inner-ring gas outlet 210 and is communicated with the inner-ring gas outlet 210. The outer-ring part 20 is correspondingly disposed above the outer-ring gas outlet 220 and is communicated with the outer-ring gas outlet 220. The burner head 200 has an equal number of ejector tubes and gas mixing chambers. Gas is injected into the ejector tube and burns fully in the gas mixing chamber corresponding to the ejector tube, and enters the sub-fire vent 100 through the inner-ring gas outlet 210 and the outer-ring gas outlet 220.

[0062] Since the cooking burner 1000 provided by the embodiment of the present invention includes the sub-fire vent 100 provided by the above embodiment and has the same technical effect as the sub-fire vent 100, connecting the burner head 200 and the sub-fire vent 100 enables the gas to first enter the burner head 200 for mixing and burning therein, and then enter the sub-fire vent 100, which can further burn the gas, ensure complete combustion of the gas, and improve the thermal efficiency of the cooking burner 1000.

[0063] As Figures 1-3 shown, the burner head 200 includes a burner head outer ring 230 and a burner head inner ring 240. The burner head outer ring 230 is provided with an outer-ring ejector tube 2301 and an outer-ring gas mixing chamber 2302. The burner head inner ring 240 is provided with an inner-ring ejector tube 2401 and an inner-ring gas mixing chamber 2402. The outer-ring ejector tube 2301 and the inner-ring ejector tube 2401 both have a primary air inlet for ejecting primary air. Gas is mixed with primary air in the outer-ring gas mixing chamber 2302 to enter the outer-ring part 20, and gas is mixed with primary air in the inner-ring gas mixing chamber 2402 to enter the inner-ring part 10.

[0064] It should be noted that the gas is sprayed into the outer ring ejector pipe 2301 of the outer ring 230 of the burner head through the outer ring nozzle, and the primary air is ejected through the primary air inlet on the outer ring ejector pipe 2301. The gas and air are mixed in the outer ring mixing chamber 2302, and enter the gas flow channel 30 through the outer ring air outlet 220, and then enter the outer ring part 20; the gas is sprayed into the inner ring ejector pipe 2401 of the inner ring 240 of the burner head through the inner ring nozzle, and the primary air is ejected through the primary air inlet on the inner ring ejector pipe 2401. The gas and air are mixed in the inner ring mixing chamber 2402, and enter the inner ring part 10 through the inner ring air outlet 210.

[0065] With this setting, the gas is first mixed and burned with the primary air in the inner ring mixing chamber 2402 and the outer ring mixing chamber 2302 respectively, and then enters the burner 100 to be mixed and burned with the secondary air. Its combustion efficiency is higher, the gas utilization rate is higher, and the flue gas can be reduced.

[0066] As Figures 1-3 shown, the cooking appliance burner 1000 further includes: an outer ring burner cap 300 and an inner ring burner cap 400. The outer ring burner cap 300 is arranged above the outer ring part 20 and is communicated with the outer ring part 20; the inner ring burner cap 400 is arranged above the inner ring part 10 and is communicated with the inner ring part 10.

[0067] Specifically, the gas flow channel 30 is communicated with the outer ring air outlet 220 and the outer ring part 20. The gas-air mixture from the outer ring air outlet 220 flows into the gas flow channel 30 and further flows into the outer ring part 20. The outer ring burner cap 300 covers the outer ring part 20, and it defines a closed outer ring channel with the outer ring part 20. A plurality of outer ring fire holes are arranged on the outer periphery of the outer ring burner cap 300. The gas in the closed outer ring channel is ejected from the outer ring fire holes and reacts fully with the secondary air flowing out of the secondary air flow channel 40 for combustion.

[0068] The gas-air mixture from the inner ring air outlet 210 flows into the inner ring part 10. The inner ring burner cap 400 covers the inner ring part 10, and it defines a closed inner ring channel with the inner ring part 10. A plurality of inner ring fire holes are arranged on the outer periphery of the inner ring burner cap 400. The gas in the closed inner ring channel is ejected from the inner ring fire holes and reacts fully with the secondary air flowing out of the secondary air flow channel 40 for combustion.

[0069] In this way, the secondary air can react fully with the gas ejected from the inner ring fire holes and the gas ejected from the outer ring fire holes respectively to promote the complete combustion of the gas and improve the thermal efficiency of the cooking appliance burner 1000.

[0070] According to the gas stove of the embodiment of the present invention, the gas stove includes a housing and the cooking burner 1000 of the above embodiment. The cooking burner 1000 is installed on the housing. Since the gas stove provided by the embodiment of the present invention includes the cooking burner 1000 provided by the above embodiment, it has the same technical effects as the cooking burner 1000. This gas stove can effectively reduce flue gas and improve thermal efficiency.

[0071] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention 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, it should not be construed as a limitation to the present invention.

[0072] In the description of the present invention, the "first feature" and "second feature" may include one or more of such features.

[0073] In the description of the present invention, the meaning of "a plurality" is two or more.

[0074] In the description of the present invention, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween.

[0075] In the description of the present invention, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature.

[0076] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0077] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A fire divider, characterized in that, Comprising: Inner ring part (10); Outer ring part (20), the inner ring part (10) and the outer ring part (20) are arranged at intervals, and an independent gas flow channel (30) and a secondary air flow channel (40) are formed therebetween. The gas flow channel (30) extends radially and communicates with the outer ring part (20). The aspect ratio W / H of the gas flow channel (30) is between 0.7 and 0.

9. The occupied area of the gas flow channel (30) in the circumferential direction is 0.3 to 0.4 times the area of the gap between the inner ring part (10) and the outer ring part (20) in the circumferential direction.

2. The fire divider according to claim 1, wherein, The gas flow channel (30) has an inclined guide surface (31), and the guide surface (31) extends upward and toward the outer wall (21) of the outer ring part (20) to connect with the bottom end of the outer wall (21) of the outer ring part (20).

3. The sub-firearm according to claim 2, wherein, The bottom surface (32) of the gas flow channel (30) is lower than the bottom end of the outer wall (21) of the outer ring part (20), and both ends of the bottom surface (32) are respectively connected to the outer wall of the inner ring part (10) and the guide surface (31).

4. The sub-firearm according to claim 3, characterized in that, The depth difference between the bottom surface (32) and the bottom end of the outer wall (21) of the outer ring part (20) is H, and 1mm ≤ H ≤ 7mm.

5. The sub-firearm according to claim 3, characterized in that, The included angle between the guide surface (31) and the extension line of the bottom surface (32) is α, and 5° ≤ α ≤ 30°.

6. The sub-firearm according to claim 1, wherein At least one surface of the gas flow channel (30) is configured as an inclined surface, and the cross-sectional area of the end of the gas flow channel (30) far from the outer ring part (20) is larger than the cross-sectional area of the end of the gas flow channel (30) close to the outer ring part (20).

7. The sub-firearm according to claim 1, characterized in that, The roughness of the inner surface of the gas flow channel (30) is less than the roughness of the inner surface of the outer ring part (20).

8. The fire divider according to claim 1, characterized in that, The connection between the gas flow channel (30) and the outer ring part (20) has a circular arc transition.

9. A cooking stove burner, characterized in that, Comprising: Burner head (200); The burner (100) according to any one of claims 1-8, the burner (100) is arranged above the burner head (200). The inner ring gas outlet (210) of the burner head (200) communicates with the inner ring part (10), the outer ring gas outlet (220) of the burner head (200) communicates with the gas flow channel (30), the burner head (200) has a plurality of ejector tubes and a plurality of mixing chambers, each ejector tube corresponds to one mixing chamber, and the mixing chamber communicates with the burner (100).

10. A gas stove, characterized in that, Comprising: A housing and the cooking burner (1000) according to claim 9.

Images