Combustor and stove comprising same

Abstract

The combustor comprises a gas mixing chamber, an upper air inlet inner ring injection channel and an inner ring nozzle arranged towards the inner ring injection channel, the gas mixing chamber comprises an inner ring part and an outer ring part, a middle shell extends between the inner ring part and the outer ring part, and the middle shell is provided with a gas inlet and a gas outlet. The two ends of the middle shell are in butt joint with and communicate with the inner ring part and the outer ring part correspondingly, an inner cavity of the middle shell forms a part of an inner ring injection channel, an outlet of the middle shell communicates with an inner ring cavity, an inlet of the middle shell communicates with an opening space located in the outer ring part, and the radial outward side of the opening space is open. And the inner ring nozzle is arranged towards the opening space or the inlet of the middle shell. Under the condition that the size of the burner is not increased, it is guaranteed that the inner ring injection channel has enough distance to inject air, the injection effect is improved, and therefore it is guaranteed that the index of smoke does not exceed the standard. And compared with air inflow from the position between the inner ring part and the outer ring part, a better air source is achieved, and the air injection effect is improved.

Description

Technical Field

[0001] This utility model relates to a burner and a stove including the burner. Background Technology

[0002] Existing conventional bottom-intake gas stoves suffer from flame instability when the cabinet door is closed or opened, leading to poor combustion or even flameout. Therefore, some solutions employ an inner-ring top-intake design to address these shortcomings. For example, Chinese Patent Publication CN114060804A discloses a burner in which both the inner-ring nozzle and inner-ring ejector channel are top-intake (located above the mounting plate). This ensures that the air entering the inner-ring ejector channel originates from above the cabinet and is unaffected by the opening or closing of the cabinet door.

[0003] However, the inner ring ejector channel in this design is not as long as the inner ring ejector channel extending upwards from below, resulting in poor air ejection capacity and a tendency for incomplete combustion, leading to excessive flue gas emissions. To ensure compliance with flue gas emissions standards, the burner diameter needs to be increased, but increasing the burner diameter will reduce energy efficiency. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defects of the existing technology, such as poor ejection capacity of the inner ring ejector channel with top air intake and easy excessive flue gas.

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

[0006] A burner includes a mixing chamber, an upper-inlet inner ring ejector channel, and an inner ring nozzle disposed toward the inner ring ejector channel. The mixing chamber includes an inner ring portion and an outer ring portion. The inner ring ejector channel communicates with an inner ring cavity within the inner ring portion. An intermediate housing extends between the inner ring portion and the outer ring portion. Both ends of the intermediate housing are respectively connected to and communicate with the inner ring portion and the outer ring portion. The inner cavity of the intermediate housing is formed as part of the inner ring ejector channel. The outlet of the intermediate housing communicates with the inner ring cavity. The inlet of the intermediate housing communicates with an opening space located in the outer ring portion. The opening space is radially outward. The inner ring nozzle is disposed toward the opening space or the inlet of the intermediate housing.

[0007] In this design, the continuously extending intermediate shell fully utilizes the distance between the inner and outer rings as an extension of the inner ring ejector channel's length. Simultaneously, the opening space between the inner ring nozzle and the inner ring ejector channel can also be utilized as part of the inner ring ejector channel. This ensures sufficient distance for the inner ring ejector channel to eject air without increasing the burner size, improving the ejection effect and ensuring that flue gas parameters do not exceed standards. Furthermore, this inner ring ejector channel directly draws air radially outward from the outer ring, providing a better air source compared to air intake between the inner and outer rings, thus enhancing the air ejection effect.

[0008] Preferably, the burner further includes an inner channel housing extending within the inner annular cavity, the inner channel housing being connected to the inner annular portion, and the inner channel housing forming part of the inner annular ejector channel. The inner channel housing further increases the extension distance of the inner annular ejector channel, which is beneficial for further improving the ejection effect. It also increases the tortuosity of the mixed gas flow in the inner annular portion, reducing the gas velocity and thus stabilizing the inner annular flame.

[0009] Preferably, the inner ring nozzle is disposed outside the opening space, which becomes part of the inner ring ejection channel. This further increases the distance of the inner ring ejection channel by utilizing the radial distance of the opening space, i.e., the radial distance of the outer ring portion.

[0010] Preferably, the burner includes an inner annular gas passage, and the nozzle is connected to the outlet of the inner annular gas passage. A portion of the inner annular gas passage extends along an axis parallel to the inner annular ejector passage, and another portion extends along a vertical direction relative to the burner. This ensures that the gas from below can pass through the upper passage.

[0011] Preferably, the opening space extends radially, and the inner ring nozzle is located within the opening space. Thus, the inner ring nozzle is blocked vertically by the opening space, making it less likely for liquids or solids, such as spills, to come into contact with the inner ring nozzle, thereby ensuring its continuous unobstructed flow and a stable and continuous supply of internal combustion gas.

[0012] Preferably, the radially inward side of the opening space has an open secondary air inlet, which leads to an annular cavity located between the inner and outer ring portions. The secondary air inlet is located on one or both sides of the inlet of the intermediate housing. This allows the opening space to be used as a channel for secondary air intake, ensuring secondary air intake between the inner and outer ring portions while also allowing for a reasonable arrangement within the limited space of the burner.

[0013] Preferably, the intermediate housing includes side portions located on one or both sides of the inlet of the intermediate housing, which obstruct the inlet of the intermediate housing and the secondary air inlet in the circumferential direction of the burner. The inlet of the intermediate housing has a high airflow velocity, which can effectively entrain surrounding air. Air inside the side portions is entrained into the inlet of the intermediate housing, while secondary air is also entrained and enters through the outer secondary air inlet of the side portions. This achieves entrainment of the inner ring entrainment channel while also improving the entrainment effect of the secondary air inlet.

[0014] Preferably, the distance between the two side portions of the inlet of the intermediate housing gradually increases in the radially outward direction. The shape that gradually narrows towards the inlet of the intermediate housing is beneficial for air accumulation and entrainment.

[0015] Preferably, the upper end of the intermediate housing aligns with the upper end of the opening space, and the lower end of the intermediate housing aligns with the lower end of the opening space. The upper and lower sides of the side portion extend to the upper and lower ends of the intermediate housing, respectively. The upper end, lower end, and side portion of the intermediate housing surround the inlet of the intermediate housing. Thus, the intermediate housing and the side portion together form a portion of the inner annular ejection channel, which not only increases the ejection distance but also ensures a seal in front of the inlet of the intermediate housing, preventing leakage at the junction of the intermediate housing and the outer annular portion.

[0016] A stove, the stove including the burner.

[0017] The significant advantages of this invention are: without increasing the burner size, it ensures sufficient distance in the inner ring ejector channel to eject air, improving the ejection effect and thus ensuring that flue gas parameters do not exceed standards. Furthermore, compared to air intake between the inner and outer rings, it provides a better air source, further enhancing the air ejection effect. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the mixing chamber of a preferred embodiment of the present invention.

[0019] Figure 2 This is a top view of the mixing chamber of a preferred embodiment of the present invention.

[0020] Figure 3 This is a partial cross-sectional view of the mixing chamber of a preferred embodiment of the present invention.

[0021] Figure 4 This is a schematic diagram of the opening space of the mixing chamber in a preferred embodiment of the present invention.

[0022] Figure 5This is a partially enlarged structural diagram of the opening space in a preferred embodiment of the present invention.

[0023] Figure 6 This is a horizontal cross-sectional view of the mixing chamber of a preferred embodiment of the present invention.

[0024] Figure 7 This is a three-dimensional structural diagram of the burner according to a preferred embodiment of the present invention.

[0025] Figure 8 This is a front view structural diagram of the burner according to a preferred embodiment of the present invention.

[0026] Figure 9 This is a top view of the mixing chamber of a preferred embodiment of the present invention.

[0027] Figure 10 This is a partial cross-sectional view of the burner according to a preferred embodiment of the present invention.

[0028] Explanation of reference numerals in the attached figures

[0029] Mixing chamber 100

[0030] Inner Ring Road 110

[0031] Inner ring cavity 111

[0032] Outer Ring Road 120

[0033] Intermediate shell 130

[0034] Imported 131

[0035] Exports 132

[0036] Inner cavity 133

[0037] Inner channel housing 134

[0038] Opening space 140

[0039] Secondary air inlet 141

[0040] Inner ring nozzle 150

[0041] Inner ring gas passage 160

[0042] Side 170

[0043] Inner ring ejection channel C Detailed Implementation

[0044] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0045] like Figures 1-10As shown, a preferred embodiment of this utility model discloses a burner, including a mixing chamber 100. As... Figures 1-3 As shown, the burner in this embodiment also includes an inner ring ejector channel C with an upper air inlet and an inner ring nozzle 150 disposed toward the inner ring ejector channel C. The mixing chamber 100 includes an inner ring portion 110 and an outer ring portion 120. The inner ring ejector channel C communicates with the inner ring cavity 111 in the inner ring portion 110. An intermediate shell 130 extends between the inner ring portion 110 and the outer ring portion 120. The two ends of the intermediate shell 130 are respectively connected to and communicate with the inner ring portion 110 and the outer ring portion 120. The inner cavity 133 of the intermediate shell 130 is formed as part of the inner ring ejector channel C. The outlet 132 of the intermediate shell 130 communicates with the inner ring cavity 111. The inlet 131 of the intermediate shell 130 communicates with the opening space 140 located in the outer ring portion 120. The opening space 140 is open on the radially outward side. The inner ring nozzle 150 is disposed toward the opening space 140 or the inlet 131 of the intermediate shell 130.

[0046] In this embodiment, the inner ring nozzle 150 can be directly disposed within the opening space 140, directly outputting gas towards the inlet 131 of the intermediate housing 130. Alternatively, it can be disposed outside the opening space 140, outputting gas indirectly towards the inlet 131 of the intermediate housing 130 by approaching the opening space 140. The intermediate housing 130 can be an integral structure formed with the inner ring portion 110 and the outer ring portion 120, or it can be connected to the inner ring portion 110 and the outer ring portion 120 by various known methods such as welding. The opening space 140 can be a blind hole or a non-blind hole opened on the outer ring portion 120, or in some embodiments, it can utilize the original secondary air intake channel on the outer ring portion 120. In this embodiment, top air intake refers to the situation where, after the burner is installed in the stove, the inlet of the inner ring ejector channel C is located on the mounting plate or base plate of the stove, that is, air intake from the external open environment.

[0047] In this embodiment, the continuously extending intermediate shell 130 fully utilizes the distance between the inner ring portion 110 and the outer ring portion 120 as an extension of the length of the inner ring ejector channel C. Simultaneously, the opening space 140 between the inner ring nozzle 150 and the inner ring ejector channel C can also be utilized as part of the inner ring ejector channel C. This ensures that the inner ring ejector channel C has sufficient distance to eject air without increasing the burner size, improving the ejection effect and ensuring that the flue gas parameters do not exceed the limits. Furthermore, the inner ring ejector channel C thus configured directly intakes air radially outward from the outer ring portion 120, providing a better air source compared to intake between the inner ring portion 110 and the outer ring portion 120, thereby improving the air ejection effect.

[0048] like Figures 1-3As shown, the burner in this embodiment preferably also includes an inner channel housing 134 extending within the inner annular cavity 111. The inner channel housing 134 is connected to the inner annular portion 110 and forms part of the inner annular ejector channel C. The inner channel housing 134 further increases the extension distance of the inner annular ejector channel C, which is beneficial to further improve the ejection effect. It also increases the tortuosity of the flow of the mixed gas in the inner annular portion 110, reduces the gas flow rate, and is beneficial to stabilizing the inner annular flame. Of course, in other embodiments, the inner channel housing 134 may have a more tortuous extension shape, such as an S-shape, to further reduce the gas flow rate. In some other embodiments, the additional inner channel housing 134 may not be provided, and the outlet 132 of the intermediate housing 130 directly connects to the inner annular cavity 111.

[0049] In some embodiments, the inner ring nozzle 150 may be disposed outside the opening space 140, which becomes part of the inner ring ejector channel C. This further increases the distance of the inner ring ejector channel C by utilizing the radial distance of the opening space 140, i.e., the radial distance of the outer ring portion 120. The opening space 140 may be a blind orifice to ensure that all gas entering the opening space 140 enters the inlet 131 of the intermediate housing 130.

[0050] like Figures 1-3 As shown, the burner in this embodiment preferably includes an inner annular gas passage 160, with a nozzle connected to the outlet 132 of the inner annular gas passage 160. A portion of the inner annular gas passage 160 extends along an axis parallel to the inner annular ejector passage C, and another portion extends along a vertical direction relative to the burner. This ensures that the gas below can pass through the upper passage.

[0051] like Figures 1-3 As shown, in this embodiment, the opening space 140 extends in the radial direction, and the inner ring nozzle 150 is located within the opening space 140. Thus, the inner ring nozzle 150 is blocked in the vertical direction by the opening space 140, making it difficult for liquids or solids, such as spills, to come into contact with the inner ring nozzle 150, thereby ensuring the continuous unobstructed flow of the inner ring nozzle 150 and guaranteeing a stable and continuous supply of the inner ring gas.

[0052] like Figures 4-6 As shown, in a preferred embodiment, the radially inward side of the opening space 140 has an open secondary air inlet 141. The secondary air inlet 141 leads to the annular cavity located between the inner ring portion 110 and the outer ring portion 120. The secondary air inlet 141 is located on one or both sides of the inlet 131 of the intermediate housing 130. Thus, the opening space 140 can be used as a channel for secondary air intake, ensuring secondary air intake between the inner ring portion 110 and the outer ring portion 120 while also being rationally arranged within the limited space of the burner.

[0053] like Figures 4-6 As shown, in a further preferred embodiment, the intermediate housing 130 includes side portions 170 located on one or both sides of the inlet 131 of the intermediate housing 130. The side portions 170 obstruct the inlet 131 and the secondary air inlet 141 of the intermediate housing 130 in the circumferential direction of the burner. The inlet 131 of the intermediate housing 130 has a high airflow velocity, which can effectively entrain surrounding air. Air inside the side portions 170 is entrained into the inlet 131 of the intermediate housing 130, while secondary air is also entrained and enters through the secondary air inlet 141 on the outer side of the side portions 170. This improves the entrainment effect of the secondary air while simultaneously achieving entrainment through the inner ring entrainment channel C. Specifically, according to Bernoulli's principle, under the high-speed gas injection effect of the inner ring nozzle 150, the air pressure in the vicinity is lower than the surrounding air pressure, which facilitates the external air to supplement the inner ring with secondary air through the secondary air inlet 141 and other conventional secondary air inlets that may exist in other locations. This results in more complete combustion in the inner ring, reduced flue gas, and improved energy efficiency.

[0054] like Figures 4-6 As shown, in a further preferred embodiment, the distance between the side portions 170 on both sides of the inlet 131 of the intermediate housing 130 gradually increases in the radially outward direction. The shape that gradually narrows towards the inlet 131 of the intermediate housing 130 is beneficial for air gathering and ejection effects.

[0055] like Figures 1-6 As shown, in a preferred embodiment, the upper end of the intermediate housing 130 is aligned with the upper end of the opening space 140, and the lower end of the intermediate housing 130 is aligned with the lower end of the opening space 140. The upper and lower sides of the side portion 170 extend to the upper and lower ends of the intermediate housing 130, respectively. The upper end, lower end, and side portion 170 of the intermediate housing 130 surround the inlet 131 of the intermediate housing 130. Thus, the intermediate housing 130 and the side portion 170 together form a portion of the inner ring ejection channel C, which not only increases the ejection distance but also ensures the seal in front of the inlet 131 of the intermediate housing 130, preventing leakage at the junction of the intermediate housing 130 and the outer ring portion 120.

[0056] like Figures 7-10The diagram shows the overall structure of the burner in this embodiment. An inner ring cover 200 is installed above the inner ring portion 110, and an outer ring cover 300 is installed above the outer ring portion 120. The mixing chamber 100 is fixed relative to the base 400. The base 400 is fixed relative to the mounting plate of the cooktop, and the inner ring nozzle 150 is located above the base 400, thus achieving upward air intake. The burner of this embodiment can be used in cooktops because its main structural improvement lies in the internal structure of the mixing chamber, without causing significant changes in overall dimensions, and can be applied to various known cooktops.

[0057] This invention ensures sufficient distance for air to be drawn into the inner ring ejector channel C without increasing the burner size, thereby improving the ejection effect and ensuring that the flue gas indicators do not exceed the standards. Furthermore, compared to air intake between the inner ring section 110 and the outer ring section 120, it provides a better air source and enhances the air ejection effect.

[0058] 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 comprising a mixing chamber, an upper-inlet inner annular ejector channel, and an inner annular nozzle disposed toward the inner annular ejector channel, wherein the mixing chamber comprises an inner annular portion and an outer annular portion, and the inner annular ejector channel communicates with an inner annular cavity within the inner annular portion, characterized in that, An intermediate housing extends between the inner ring portion and the outer ring portion. The two ends of the intermediate housing are respectively connected to and communicate with the inner ring portion and the outer ring portion. The inner cavity of the intermediate housing forms part of the inner ring ejection channel. The outlet of the intermediate housing communicates with the inner ring cavity. The inlet of the intermediate housing communicates with the opening space located in the outer ring portion. The opening space is open radially outward. The inner ring nozzle is positioned facing the opening space or the inlet of the intermediate housing.

2. The burner as claimed in claim 1, characterized in that, The burner also includes an inner channel housing extending within the inner annular cavity, the inner channel housing being connected to the inner annular portion, and the inner channel housing forming part of the inner annular ejector channel.

3. The burner as described in claim 1, characterized in that, The inner ring nozzle is disposed outside the opening space, and the opening space becomes part of the inner ring ejection channel.

4. The burner as claimed in claim 1, characterized in that, The burner includes an inner annular gas passage, the nozzle is connected to the outlet of the inner annular gas passage, a portion of the inner annular gas passage extends along an axis parallel to the inner annular ejector passage, and another portion extends along a vertical direction relative to the burner.

5. The burner as claimed in claim 1, characterized in that, The opening space extends in the radial direction, and the inner ring nozzle is located within the opening space.

6. The burner according to any one of claims 1-5, characterized in that, The radially inner side of the opening space has an open secondary air inlet, which leads to an annular cavity located between the inner ring and the outer ring. The secondary air inlet is located on one or both sides of the inlet of the intermediate shell.

7. The burner as claimed in claim 6, characterized in that, The intermediate housing includes side portions located on one or both sides of the inlet of the intermediate housing, which block the inlet of the intermediate housing and the secondary air inlet in the circumferential direction of the burner.

8. The burner as claimed in claim 7, characterized in that, The distance between the two sides of the inlet of the intermediate shell gradually increases in the radially outward direction.

9. The burner as claimed in claim 7, characterized in that, The upper end of the intermediate shell is connected to the upper end of the opening space, and the lower end of the intermediate shell is connected to the lower end of the opening space. The upper and lower sides of the side portion extend to the upper and lower ends of the intermediate shell, respectively. The upper end, the lower end of the intermediate shell, and the side portion surround the inlet of the intermediate shell.

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

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