Burner and hob

Abstract

The utility model provides a kind of burner and stove, it is related to stove technical field.Burner includes outer ring gas mixing chamber and outer ring injection pipe, outer ring gas mixing chamber is equipped with outer ring gas mixing cavity, outer ring injection pipe includes outer ring gas outlet section, and outer ring gas outlet section is connected in outer ring gas mixing chamber and is communicated with outer ring gas mixing cavity.Outer ring gas outlet section includes multiple gas outlet subsections, multiple gas outlet subsections are interval arranged along the circumferential direction of burner, and gap is equipped between the side of adjacent gas outlet subsections, to increase the contact area of outer ring gas outlet section wall surface and cold air, reduce the wall surface of outer ring gas outlet section and gas temperature therein, improve primary air injection effect.Outer ring gas mixing chamber includes multiple interval parts, multiple interval parts are interval arranged along the circumferential direction of burner, and secondary air inlet passage is formed between adjacent interval parts, and cold air heat dissipation cavity is equipped below secondary air inlet passage, to reduce the temperature of secondary air inlet passage, improve secondary air supplement.

Description

Technical Field

[0001] This utility model relates to the field of stove technology, and in particular to a burner and stove. Background Technology

[0002] In existing technology, the inner ring channel of a stove burner is surrounded by an outer ring channel. The gas path of the outer ring channel is formed by the gas outlet of the outer ring injector tube circumferentially around the burner before being injected upwards. When the stove is working normally, the temperature of the burner structure itself and the gas passage cavity is relatively high, resulting in a lower gas density, smaller mass flow rate, and lower momentum after exiting the nozzle. This weakens the injection capability, which is not conducive to primary air injection, leading to incomplete combustion and low thermal efficiency.

[0003] The burner's mixing chamber is equipped with a secondary air passage to replenish the inner ring of secondary air, with a solid base below the secondary air passage. The high temperature of the secondary air passage results in a small temperature difference between the secondary air inlet and the inner side, leading to low thermal pressure and a weak thermal pressure head. This is detrimental to the entrainment of secondary air in the inner ring, resulting in incomplete combustion and low thermal efficiency. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defects of existing stove burners, such as high temperature, poor ejection effect and low thermal efficiency, and to provide a burner and stove.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] This utility model provides a burner, which includes an outer ring mixing chamber and an outer ring ejector tube. The outer ring mixing chamber is provided with an outer ring mixing cavity. The outer ring ejector tube includes an outer ring gas outlet section, which is connected to the outer ring mixing chamber and communicates with the outer ring mixing cavity.

[0007] The outer ring gas outlet section includes multiple gas outlet segments, which are spaced apart along the circumferential direction of the burner, and gaps are provided between the sides of adjacent gas outlet segments;

[0008] The outer ring mixing chamber includes multiple intervals, which are spaced apart along the circumferential direction of the burner. Each interval corresponds to and is connected to a multiple air outlet section. A secondary air intake channel is formed between adjacent intervals, and a cold air heat dissipation cavity is provided below the secondary air intake channel.

[0009] In this design, the combustion gas flows into the outer ring mixing chamber from the outer ring outlet section of the outer ring ejector. By dividing the outer ring outlet section into multiple outlet segments spaced apart along the circumferential direction of the burner, with gaps between the sides of adjacent outlet segments, the contact area between the outer ring outlet section wall and the cold air is increased, thus reducing the temperature of the outer ring outlet section wall and the combustion gas within it. According to the ideal gas law, the lower the temperature of the combustion gas, the greater its density. At the same volumetric flow rate, the denser the combustion gas, the greater its mass flow rate; the greater the mass flow rate of the combustion gas jet, the greater its momentum. The ejection effect essentially relies on the momentum of the combustion gas jet to entrain surrounding air. Therefore, reducing the temperature of the outer ring outlet section wall and the combustion gas within it can improve the primary air entrainment capability, thereby ensuring more complete primary air replenishment, more complete combustion, and improved thermal efficiency. The primary air injection process occurs inside the outer ring injector. If the temperature inside the outer ring injector is low, while the temperature of the flame and flue gas produced by combustion is high, a significant temperature gradient will form in the flame stabilization region downstream and above the injector outlet. This temperature gradient generates a natural upward suction force, also known as the thermal pressure head effect. This upward suction force helps to further pull the initially injected air towards the flame. The greater the temperature difference, the stronger the thermal pressure head effect, and the stronger the primary air injection capability, thus improving thermal efficiency. By configuring the outer ring mixing chamber with multiple intervals spaced along the circumferential direction of the burner, each interval corresponds to and connects with multiple exhaust sections. The combustion gas in each exhaust section flows into the corresponding interval, forming a secondary air intake channel between adjacent intervals. By setting a cold air heat dissipation cavity below the secondary air intake channel, the temperature of the secondary air intake channel can be reduced, increasing the temperature difference between the inside and outside of the secondary air intake channel, enhancing the thermal pressure head effect, improving secondary air replenishment, resulting in more complete combustion and improved energy efficiency.

[0010] Preferably, the outer ring ejector tube further includes an outer ring air inlet section, and the air outlet section is divided into three parts: a first section, a second section, and a third section. The first section is connected to the outer ring air inlet section, and the second section and the third section are connected to the first section. The second section and the third section are not directly connected to each other.

[0011] In this design, the first section is connected to the outer ring intake section, and the second and third sections are connected to the first section. Gas flows from the outer ring intake section into the first section first, and then into the second and third sections respectively. The three-section design simplifies the structure and allows for sufficient gaps between the sides of each section. The second and third sections are not directly connected, allowing their sidewalls more space to contact the cold air, further improving the cooling effect and combustion efficiency.

[0012] Preferably, the first segment and the second segment are connected by a first connecting port, and the first segment and the third segment are connected by a second connecting port, with the first connecting port and the second connecting port located close to the radial center of the burner.

[0013] In this design, by placing the first and second connecting ports close to the radial center of the burner, the contact area between the outlet section wall and the cold air can be increased, thereby further improving the cooling effect and combustion efficiency.

[0014] Preferably, the inner cavity volume of the first segment is greater than the inner cavity volume of the second segment, and the inner cavity volume of the first segment is greater than the inner cavity volume of the third segment.

[0015] In this scheme, by setting the inner cavity volume of the first segment to be greater than that of the second segment, and simultaneously setting the inner cavity volume of the first segment to be greater than that of the third segment, sufficient gas can flow into the second and third segments from the first segment, ensuring gas flow and improving combustion stability.

[0016] Preferably, the inner cavity volume of the second segment is equal to the inner cavity volume of the third segment.

[0017] In this scheme, by setting the inner cavity volume of the second segment and the inner cavity volume of the third segment to be equal, the flow rate and heat dissipation effect of the second segment and the third segment are more uniform, the overall heat dissipation effect of the burner is more balanced, and the combustion is more stable.

[0018] Preferably, the plurality of the gas outlet sections extend along the radial direction of the burner.

[0019] In this design, by extending multiple exhaust sections along the radial direction of the burner, a larger gap is created between the exhaust sections for heat dissipation, thereby further improving efficiency.

[0020] Preferably, in the direction from the radially inner side to the radially outer side of the burner, the width of at least one of the gas outlet sections gradually increases in the horizontal direction.

[0021] In this design, by gradually increasing the width of at least one outlet segment in the horizontal direction along the radial inner side to the radial outer side of the burner, it is easier for the gas to flow into the outer ring mixing chamber, ensuring the gas replenishment of the outer ring mixing chamber and improving combustion efficiency.

[0022] Preferably, the burner further includes a base, and the outer annular mixing chamber and the outer annular ejector tube are connected to the base;

[0023] The outer ring mixing chamber includes a bottom plate, the base includes a support plate, and the cold air heat dissipation cavity is formed between the bottom plate and the support plate.

[0024] In this design, a cold air cooling cavity is formed by utilizing the space between the base plate and the support plate, thereby improving the overall stability of the burner while increasing the heat dissipation effect.

[0025] Preferably, the cold air heat dissipation cavity includes a heat dissipation vent, which is located on the circumferential outer side of the burner.

[0026] In this design, by placing the heat dissipation vent on the outer periphery of the burner, it is easier for cold air from the outer periphery of the burner to flow into the cold air heat dissipation cavity, thereby improving the cooling effect and further enhancing efficiency.

[0027] This utility model also provides a stove, which includes the burner described above.

[0028] The positive and progressive effects of this utility model are as follows:

[0029] By configuring the outer annular air outlet section into multiple outlet segments spaced apart along the circumferential direction of the burner, with gaps between the sides of adjacent outlet segments, the contact area between the outer annular air outlet section wall and the cold air is increased, reducing the temperature of the outer annular air outlet section wall and the combustion gas within it. This results in more complete primary air supply, more complete combustion, a stronger thermal pressure head effect, and improved thermal efficiency. Furthermore, by configuring the outer annular mixing chamber into multiple spaced intervals spaced along the circumferential direction of the burner, each spaced interval corresponds to and connects with one of the outlet segments. Combustion from each outlet segment flows into its corresponding spacer, forming a secondary air intake channel between adjacent spacers. By providing a cold air cooling cavity below the secondary air intake channel, the temperature of the secondary air intake channel is reduced, increasing the temperature difference between the inside and outside of the secondary air intake channel. This enhances the thermal pressure head effect, improves secondary air supply, and results in more complete combustion and improved energy efficiency. Attached Figure Description

[0030] Figure 1 This is a three-dimensional structural diagram of a burner according to an embodiment of the present invention.

[0031] Figure 2 This is another three-dimensional structural schematic diagram of a burner according to an embodiment of the present invention.

[0032] Figure 3 This is a partial cross-sectional perspective view of a burner according to an embodiment of the present invention.

[0033] Figure 4This is a schematic diagram of the internal three-dimensional structure of the outer ring air outlet section according to an embodiment of the present invention.

[0034] Explanation of reference numerals in the attached figures:

[0035] Burner 100

[0036] 200 outer ring mixing chamber

[0037] 210 outer ring mixing chamber

[0038] Spacer 220

[0039] Base plate 230

[0040] 300 outer ring ejector tube

[0041] Outer ring exhaust section 310

[0042] 320mm exhaust segment

[0043] First segment 321

[0044] Second segment 322

[0045] Third segment 323

[0046] First connecting port 324

[0047] Second connecting port 325

[0048] 330 outer ring intake section

[0049] Gap 340

[0050] Secondary air intake channel 400

[0051] Cold air heat dissipation cavity 500

[0052] 510 heat dissipation vent

[0053] Base 600

[0054] Support plate 610

[0055] High-temperature zone of flame 710

[0056] Downstream low temperature zone 720 Detailed Implementation

[0057] The present invention will be further described below by way of embodiments, but the present invention is not limited to the scope of the following embodiments.

[0058] This embodiment provides a stove, which includes a burner 100.

[0059] like Figures 1-4As shown, this embodiment provides a burner 100, which includes an outer annular mixing chamber 200 and an outer annular ejector tube 300. The outer annular mixing chamber 200 contains an outer annular mixing cavity 210. The outer annular ejector tube 300 includes an outer annular outlet section 310, which is connected to and communicates with the outer annular mixing chamber 210. The outer annular outlet section 310 includes multiple outlet segments 320, which are spaced apart along the circumferential direction of the burner 100. A gap 340 is provided between the sides of adjacent outlet segments 320. The outer ring mixing chamber 200 includes multiple intervals 220, which are spaced apart along the circumferential direction of the burner 100. Each interval 220 corresponds to and is connected to a multiple air outlet section 320. A secondary air intake channel 400 is formed between adjacent intervals 220. A cold air heat dissipation cavity 500 is provided below the secondary air intake channel 400.

[0060] Combustion flows from the outer ring outlet section 310 of the outer ring injector 300 into the outer ring mixing chamber 210. By configuring the outer ring outlet section 310 into multiple outlet segments 320, which are spaced apart along the circumferential direction of the burner 100, and with gaps 340 between the sides of adjacent outlet segments 320, the contact area between the wall of the outer ring outlet section 310 and the cold air can be increased, thereby reducing the temperature of the wall and the combustion gas within the outer ring outlet section 310. According to the ideal gas law, the lower the temperature of the combustion gas, the greater its density. Under the same volume flow rate, the denser the combustion gas, the greater its mass flow rate. The greater the mass flow rate of the combustion gas jet, the greater its momentum. The entrainment effect essentially relies on the momentum of the combustion gas jet to entrain the surrounding air. Therefore, reducing the temperature of the wall and the combustion gas within the outer ring outlet section 310 can improve the entrainment capability of the primary air, thereby making the primary air replenishment more complete, the combustion more complete, and improving thermal efficiency.

[0061] One air ejection process occurs inside the outer ring ejector tube 300. If the temperature inside the outer ring ejector tube 300 is low, while the temperature of the flame and flue gas produced by combustion is high, then a significant temperature gradient will form in the flame stabilization region downstream and above the ejector tube outlet. Figure 3 The diagram shows a high-temperature flame zone 710 and a downstream low-temperature zone 720. A temperature gradient forms between these two zones, generating a natural upward suction force, known as the thermal head effect. This upward suction force helps to further pull the initially injected air towards the flame, assisting in primary air injection. The greater the temperature difference, the stronger the thermal head effect, resulting in stronger primary air injection and improved thermal efficiency. Furthermore, lower gas temperatures lead to lower gas viscosity. Lower viscosity fluids experience less internal friction and flow more smoothly, also positively impacting injection efficiency.

[0062] By configuring the outer annular mixing chamber 200 to include multiple intervals 220, which are spaced apart along the circumferential direction of the burner 100, and each interval 220 corresponds to and is connected to a multiple outlet section 320, the combustion gas in each outlet section 320 flows into the corresponding interval 220, and a secondary air intake channel 400 is formed between adjacent intervals 220. Along the radially outer to radially inner direction of the burner 100, the temperature of the secondary air intake channel 400 gradually increases, creating a temperature difference between the inside and outside. By providing a cold air heat dissipation cavity 500 below the secondary air intake channel 400, the temperature of the secondary air intake channel 400 can be reduced, increasing the temperature difference between the inside and outside of the secondary air intake channel 400, enhancing the effect of the thermal pressure head, improving the secondary air supply to the inner ring, resulting in more complete combustion and improved energy efficiency.

[0063] The outer ring ejector 300 also includes an outer ring inlet section 330, and an outlet section 320 divided into three parts: a first section 321, a second section 322, and a third section 323. The first section 321 is connected to the outer ring inlet section 330, and the second and third sections 322 and 323 are connected to the first section 321. The second and third sections 322 and 323 are not directly connected. By connecting the first section 321 to the outer ring inlet section 330 and the second and third sections 322 and 323 to the first section 321, gas first flows from the outer ring inlet section 330 into the first section 321, and then flows into the second and third sections 322 and 323 respectively. The structure is simplified by setting three segments, while allowing sufficient gaps 340 between the sides of each segment. The second segment 322 and the third segment 323 are not directly connected, so that the side walls of both have more space to come into contact with cold air, which further improves the cooling effect and combustion efficiency.

[0064] In this embodiment, the number of air outlet segments 320 is three. In other embodiments, other numbers of air outlet segments 320 that are deemed appropriate by those skilled in the art may also be selected.

[0065] The first segment 321 and the second segment 322 are connected by a first connecting port 324, and the first segment 321 and the third segment 323 are connected by a second connecting port 325. The first connecting port 324 and the second connecting port 325 are positioned close to the radial center of the burner 100. By positioning the first connecting port 324 and the second connecting port 325 close to the radial center of the burner 100, the contact area between the wall of the exhaust segment 320 and the cold air is increased, further improving the cooling effect and combustion efficiency. Simultaneously, the path of the gas flow is shortened, thereby reducing momentum loss and improving primary air injection, which is beneficial for improving energy efficiency.

[0066] The internal volume of the first segment 321 is greater than that of the second segment 322, and the internal volume of the first segment 321 is greater than that of the third segment 323. By setting the internal volume of the first segment 321 to be greater than that of the second segment 322, and simultaneously setting the internal volume of the first segment 321 to be greater than that of the third segment 323, sufficient gas can flow into the second segment 322 and the third segment 323 from the first segment 321, ensuring gas flow and improving combustion stability.

[0067] The internal volume of the second segment 322 is equal to that of the third segment 323. By setting the internal volumes of the second segment 322 and the third segment 323 to be equal, the flow rate and heat dissipation of the second segment 322 and the third segment 323 are more uniform, the overall heat dissipation of the burner 100 is more balanced, and the combustion is more stable.

[0068] Multiple exhaust sections 320 extend radially along the burner 100. By extending multiple exhaust sections 320 radially along the burner 100, a larger gap is created between the multiple exhaust sections 320 for heat dissipation, further improving efficiency.

[0069] Along the radially inner to radially outer direction of the burner 100, the width of at least one outlet section 320 gradually increases in the horizontal direction. By gradually increasing the width of at least one outlet section 320 in the horizontal direction along the radially inner to radially outer direction of the burner 100, it is easier for the gas to flow into the outer annular mixing chamber 200, ensuring the gas replenishment of the outer annular mixing chamber 200 and improving combustion efficiency.

[0070] The burner 100 also includes a base 600, an outer annular mixing chamber 200, and an outer annular ejector tube 300 connected to the base 600. The outer annular mixing chamber 200 includes a base plate 230, and the base 600 includes a support plate 610, forming a cold air heat dissipation cavity 500 between the base plate 230 and the support plate 610. By utilizing the space between the base plate 230 and the support plate 610 to form the cold air heat dissipation cavity 500, the overall stability of the burner 100 can be improved while increasing the heat dissipation effect.

[0071] The cold air cooling cavity 500 includes a cooling vent 510, which is located on the outer periphery of the burner 100. By placing the cooling vent 510 on the outer periphery of the burner 100, it is easier for cold air from the outer periphery of the burner 100 to flow into the cold air cooling cavity 500, thereby improving the cooling effect and further enhancing efficiency.

[0072] The burner 100 in this embodiment can be used in ordinary stoves or smart stoves. The smart stove has a smart voice control module, which includes a controller, a voice receiving module, and a voice parsing module. The voice receiving module receives user commands, and the voice parsing module parses the commands. Based on the parsed commands, the controller controls the burner 100 to perform corresponding operations, thereby realizing the intelligent control of the burner 100 and improving the user experience of using the smart appliance.

[0073] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship of the device or component during normal use. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation at any time, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model in this respect.

[0074] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A burner, characterized in that, The burner includes an outer ring mixing chamber and an outer ring ejector tube. The outer ring mixing chamber is provided with an outer ring mixing cavity. The outer ring ejector tube includes an outer ring gas outlet section. The outer ring gas outlet section is connected to the outer ring mixing chamber and communicates with the outer ring mixing cavity. The outer ring gas outlet section includes multiple gas outlet segments, which are spaced apart along the circumferential direction of the burner, and gaps are provided between the sides of adjacent gas outlet segments; The outer ring mixing chamber includes multiple intervals, which are spaced apart along the circumferential direction of the burner. Each interval corresponds to and is connected to a multiple air outlet section. A secondary air intake channel is formed between adjacent intervals, and a cold air heat dissipation cavity is provided below the secondary air intake channel.

2. The burner as claimed in claim 1, characterized in that, The outer ring ejector tube also includes an outer ring air inlet section. The air outlet section is divided into three parts: a first section, a second section, and a third section. The first section is connected to the outer ring air inlet section, and the second section and the third section are connected to the first section. The second section and the third section are not directly connected to each other.

3. The burner as described in claim 2, characterized in that, The first segment and the second segment are connected by a first connecting port, and the first segment and the third segment are connected by a second connecting port. The first connecting port and the second connecting port are located close to the radial center of the burner.

4. The burner as described in claim 2, characterized in that, The inner cavity volume of the first segment is greater than that of the second segment, and the inner cavity volume of the first segment is greater than that of the third segment.

5. The burner as described in claim 4, characterized in that, The internal volume of the second segment is equal to the internal volume of the third segment.

6. The burner as claimed in claim 1, characterized in that, The plurality of the gas outlet sections extend along the radial direction of the burner.

7. The burner as claimed in claim 6, characterized in that, Along the radially inner side to the radially outer side of the burner, the width of at least one of the outlet sections gradually increases in the horizontal direction.

8. The burner as claimed in claim 1, characterized in that, The burner also includes a base, and the outer annular mixing chamber and the outer annular ejector are connected to the base; The outer ring mixing chamber includes a bottom plate, the base includes a support plate, and the cold air heat dissipation cavity is formed between the bottom plate and the support plate.

9. The burner as claimed in claim 8, characterized in that, The cold air heat dissipation cavity includes a heat dissipation vent, which is located on the circumferential outer side of the burner.

10. A stove, characterized in that, The stove includes a burner as described in any one of claims 1-9.

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