Burner and gas oven

Abstract

The utility model relates to the technical field of combustors, and particularly discloses a combustor and a gas oven, the combustor comprises a plurality of fire holes, a distribution flow channel and an ejection flow channel, the plurality of fire holes are distributed along a first direction; the distribution runner and the plurality of fire holes are distributed along a second direction; the ejection flow channel and the distribution flow channel are distributed in the first direction, the ejection flow channel comprises an incidence section, a throat part and an ejection section, the incidence section is arranged to be a gradually-shrinking flow channel extending to be connected with the throat part in the first direction, the ejection section is arranged to be a gradually-expanding flow channel with one end connected with the throat part and extending in the first direction, and the other end of the ejection section is communicated with the distribution flow channel; the size value L313 of the inlet end of the incidence section in the third direction is smaller than the size value L312 of the inlet end of the incidence section in the second direction, and the first direction, the second direction and the third direction are perpendicular to one another. According to the combustor, the occupied space of the combustor can be reduced, and miniaturization design of the combustor is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to a burner technical field, especially a kind of burner and gas oven. BACKGROUND

[0002] Burner is applied to gas stove, oven, water heater and other products, by mixing fuel and air and burning to release heat energy, with the development of technology and the rich product function, the miniaturization design of component has become the trend of development.Burner as the key component of heating, when designing, the space occupied by burner needs to be fully considered, the fire grate type burner in the related art, the air inlet of primary air of injection pipe is usually designed into circular, causing the space occupied by burner to be large. SUMMARY

[0003] The utility model aims at at least one of the technical problems in the related art is solved to some extent.For this purpose, one object of the utility model is to provide a kind of burner, can reduce the space occupied by burner, facilitate the miniaturization design of burner.

[0004] Another object of the utility model is to provide a kind of gas oven, including the burner described above.

[0005] According to the burner of the utility model embodiment, it includes: multiple fire holes, distribution channel and injection channel, the multiple fire holes are distributed along the first direction;The distribution channel and the multiple fire holes are distributed along the second direction;The injection channel and the distribution channel are distributed along the first direction, the injection channel includes incident section, throat and injection section, the incident section is designed as tapered flow passage extending to the throat along the first direction, the injection section is designed as tapered flow passage with one end connected with the throat and extending along the first direction, the other end of the injection section is communicated with the distribution channel, wherein, the size value L313 of the inlet end of the incident section along the third direction is less than the size value L312 along the second direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0006] According to the burner of the utility model embodiment, the space occupied by burner can be reduced, and the miniaturization design of burner is facilitated.

[0007] In addition, the burner according to the above embodiment of the utility model can also have the following additional technical features:

[0008] In some embodiments, at least one side of the inlet end of the incident section along the third direction is designed as a first flat part, and the distance between the middle part of the first flat part along the second direction and the axis of the injection channel is less than the distance between the end part and the axis of the injection channel.

[0009] In some embodiments, the first flat portion is provided as a straight section or an arc-shaped section extending along the second direction.

[0010] In some embodiments, the inlet end of the incidence section includes first, second, third and fourth side surfaces connected in sequence around the axis of the ejector section, the first and third side surfaces are oppositely arranged along the second direction, the second and fourth side surfaces are oppositely arranged along the third direction, and the first and / or third side surfaces are provided as arc surfaces with a middle portion convex outward along the second direction.

[0011] In some embodiments, the first and / or third side surfaces are provided as first arc surfaces centered on the axis of the ejector section,

[0012] wherein the second and / or fourth side surfaces are provided as planar surfaces; or, the second and / or fourth side surfaces are provided as second arc surfaces with a diameter greater than that of the first arc surfaces.

[0013] In some embodiments, the inlet end of the incidence section is provided as an ellipse with a major axis extending along the second direction and a minor axis extending along the third direction.

[0014] or, the inlet end of the incidence section is provided as a rectangle.

[0015] In some embodiments, the ratio of the size value L312 to the size value L313 satisfies 1

[0016] and / or, the size value L312 and the diameter size value D1 of the throat portion satisfy 3≤(L312 / D1) 2 ≤3.5.

[0017] In some embodiments, a gas collection cavity is provided between the ejector section and the distribution flow passage, the gas collection cavity communicates the ejector section and the distribution flow passage, and the gas collection cavity is provided with a second flat portion on at least one side along the third direction, which does not protrude the incidence section in projection along the first direction.

[0018] In some embodiments, the size value of the incidence section along the first direction is L311, the size value of the throat portion along the first direction is L321, the size value of the ejector section along the first direction is L331, and the diameter size value of the throat portion is D1,

[0019] wherein 4≤(L331+L321) / D1≤6; or, 1≤L311 / D1≤2.

[0020] In some embodiments, the combustor further comprises a communication groove extending along the first direction and communicating the plurality of fire holes.

[0021] In some embodiments, the distribution channel is provided with a protrusion protruding inward along a side wall of at least one side of the third direction, the distribution channel comprises a first channel, a second channel and a third channel in communication with each other, the first channel is opposite to the protrusion along the third direction, the first channel is arranged between the second channel and the communication groove, and the third channel is arranged on a side of the second channel away from the ejecting channel and is distributed with the communication groove along the second direction.

[0022] In some embodiments, the first channel has a dimension value L21 along the third direction, the second channel has a dimension value L22 along the third direction, the third channel has a dimension value L23 along the third direction, and the communication groove has a dimension value L50 along the third direction,

[0023] Wherein, L21 < L22; and / or, L21 < L23; and / or, L21 < L50; and / or, L50 < L22; and / or, L50 < L23.

[0024] In some embodiments, the combustor further comprises a gas collecting cavity arranged between the ejecting channel and the distribution channel and communicating the ejecting channel, the first channel, the second channel and the communication groove.

[0025] In some embodiments, the gas collecting cavity has a dimension value L40 along the third direction, the first channel has a dimension value L21 along the third direction, the second channel has a dimension value L22 along the third direction, and the communication groove has a dimension value L50 along the third direction,

[0026] Wherein, L21 < L40; and / or, L22 < L40; and / or, L50 < L40; and / or, L50 < L23; and / or, L50 < L22.

[0027] The gas oven according to the embodiments of the present application comprises: a machine body, a fan and the aforementioned combustor, the machine body is provided with a cooking cavity and a combustion chamber, the combustion chamber communicates with the cooking cavity; the fan is configured to drive flue gas to circulate between the cooking cavity and the combustion chamber; and the combustor is arranged in the combustion chamber.

[0028] Additional aspects and advantages of the present application will be given in part in the following description, and will become apparent from the following description, or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1is a schematic view of the burner of the embodiment of the utility model.

[0030] Figure 2 is a projection view along a first direction of the burner of the embodiment of the utility model.

[0031] Figure 3 is a sectional view of the burner of the embodiment of the utility model.

[0032] Figure 4 is a projection view along a third direction of the burner of the embodiment of the utility model.

[0033] Figure 5 is a sectional view along a first direction of the burner of the embodiment of the utility model.

[0034] Figure 6 is a sectional view along a first direction of the burner of the embodiment of the utility model.

[0035] Figure 7 is a sectional view along a first direction of the burner of the embodiment of the utility model.

[0036] Figure 8 is a schematic view of the gas oven of the embodiment of the utility model.

[0037] Figure 9 is a sectional view of the gas oven of the embodiment of the utility model.

[0038] Reference signs:

[0039] Gas oven 1000, burner 100, fire hole 10, distribution flow passage 20, first flow passage 21, second flow passage 22, third flow passage 23, boss 24, injection flow passage 30, incident section 31, inlet end 31a, first side surface 311, second side surface 312, third side surface 313, fourth side surface 314, first flat part 315, throat 32, injection section 33, gas collecting cavity 40, second flat part 41, communication groove 50, machine body 200, cooking cavity 210, combustion chamber 220, fan 300,

[0040] First direction X, second direction Z, third direction Y. DETAILED DESCRIPTION

[0041] The embodiments of the utility model are described in detail below, the examples of the embodiments are shown in the drawings, wherein the same or similar signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, and are intended to explain the utility model, and cannot be understood as the limitation of the utility model.

[0042] The first direction is an X direction shown in the drawing, the second direction is a Z direction shown in the drawing, and the third direction is a Y direction shown in the drawing.

[0043] In combination Figure 1 The burner 100 according to the embodiment of the present application comprises a plurality of fire holes 10, and the plurality of fire holes 10 are distributed along a first direction. A mixture of gas and primary air flows out of the plurality of fire holes 10 and forms a flame.

[0044] The burner 100 further comprises a distribution flow channel 20, and the distribution flow channel 20 and the plurality of fire holes 10 are distributed along a second direction. The gas is distributed to the plurality of fire holes 10 through the distribution flow channel 20. Exemplarily, the distribution flow channel 20 can be arranged below the plurality of fire holes 10, that is, the plurality of fire holes 10 can be distributed along an up-down direction with the distribution flow channel 20, so as to facilitate the distribution of the gas to the plurality of fire holes 10 through the distribution flow channel 20.

[0045] The burner 100 further comprises an injection flow channel 30, and the injection flow channel 30 is distributed along the first direction with the distribution flow channel 20. The injection flow channel 30 comprises an incident section 31, a throat section 32 and an injection section 33. The incident section 31 is arranged as a converging flow channel extending along the first direction to the throat section 32. The injection section 33 is arranged as a diverging flow channel with one end connected to the throat section 32 and extending along the first direction. The other end of the injection section 33 is connected to the distribution flow channel 20. Specifically, the injection flow channel 30 can inject the gas sprayed by the nozzle into the surrounding air, mix the gas with the primary air, and then enter the distribution flow channel 20. The incident section 31 is the initial part of the injection flow channel 30, and the gas and the primary air are sucked into the injection flow channel 30 from the incident section 31. The throat section 32 is the middle part of the injection flow channel 30, and the gas and the primary air are mixed in the throat section 32. The injection section 33 is the terminal part of the injection flow channel 30, and the mixed gas and the primary air are further mixed in the injection section 33, so as to fully mix the gas with the primary air, and then enter the distribution flow channel 20. The gas is distributed to the plurality of fire holes 10 through the distribution flow channel 20.

[0046] In combination Figure 2 The size value L313 of the inlet end 31a of the incident section 31 along the third direction is less than the size value L312 along the second direction, and the first direction, the second direction and the third direction are perpendicular to each other. Specifically, the inlet end 31a of the incident section 31 is also the air inlet of the primary air. Exemplarily, the second direction can be the height direction of the burner 100, and the third direction can be the thickness direction of the burner 100. That is, the size of the inlet end 31a of the incident section 31 in the thickness direction of the burner 100 is less than the size of the inlet end 31a of the incident section 31 along the height direction of the burner 100, so as to reduce the space occupied in the thickness direction of the burner 100, and facilitate the miniaturization design of the burner 100.

[0047] It should be noted that the primary air in the present application refers to the air that is premixed with the fuel and participates in the combustion.

[0048] Exemplarily, the burner 100 can be used in a cooking device, by reducing the size of the inlet end 31a of the injection flow channel 30 in the thickness direction of the burner 100, the structure of the burner 100 is compact, the installation of the burner 100 is facilitated, and the installation efficiency of the cooking device is improved.

[0049] According to the Venturi effect, when a fluid flows through a converging pipe, the flow rate increases and the pressure decreases, which helps to suck in the surrounding air and mix it with the gas. In order to obtain the best air suction effect of the primary air, in the related art, the primary air inlet is usually circular, but this easily leads to the size of the primary air inlet of the burner in the thickness direction of the burner protruding from other parts of the burner, resulting in the burner occupying too much space in the thickness direction. The burner 100 of the embodiment of the present application reduces the size value of the inlet end 31a of the incident section 31 in the third direction, which can be substantially consistent with the thickness of the burner 100, thereby reducing the space occupied by the burner 100 in the thickness direction, facilitating the installation of the burner 100.

[0050] The burner 100 according to the embodiment of the present application can reduce the space occupied by the burner 100 in the thickness direction, facilitate the miniaturization design of the burner 100, and facilitate the installation of the burner 100.

[0051] In the present application, the inlet end 31a of the incident section 31 can be configured in different shapes, exemplarily, the third direction of the inlet end 31a at least one side can be provided with a flat part, which can reduce the space occupied by the inlet end 31a in the third direction; or the inlet end 31a can be configured as an oval; or the inlet end 31a can be configured as a rectangle, etc. The present application provides some embodiments that the size value of the inlet end 31a of the incident section 31 in the third direction is smaller than the size value in the second direction, but this is not a limitation on the protection scope of the present application.

[0052] Exemplarily, the size of the inlet end 31a in the third direction can be reduced to the same degree as the width of other parts of the burner 100, thereby improving the installation of the burner 100.

[0053] In combination Figure 1 and Figure 2In some embodiments of the utility model, the first flat part 315 is arranged on at least one side of the entrance end 31a of the incident section 31 along the third direction, and the distance between the middle part of the first flat part 315 along the second direction and the axis of the ejector flow channel 30 is smaller than the distance between the end part of the first flat part 315 along the second direction and the axis of the ejector flow channel 30. Specifically, the first flat part 315 can be arranged on one side of the entrance end 31a of the incident section 31 along the third direction, or the first flat part 315 can be arranged on both sides of the entrance end 31a of the incident section 31 along the third direction. In combination with the accompanying drawings Figure 2 The distance between the middle part of the first flat part 315 along the second direction and the axis of the ejector flow channel 30 is D21, and the distance between the end part of the first flat part 315 along the second direction and the axis of the ejector flow channel 30 is D22, wherein D21 < D22, which can reduce the size of the entrance end 31a of the incident section 31 in the third direction, reduce the width of the entrance end 31a, facilitate the reduction of the thickness of the burner 100 as a whole, and facilitate the installation of the burner 100.

[0054] The first flat part 315 is arranged as a straight section extending along the second direction, which facilitates the processing and forming of the burner 100, facilitates the miniaturization design of the burner 100, and avoids the burner 100 occupying too much space in the third direction.

[0055] Optionally, the first flat part 315 is arranged as an arc-shaped section extending along the second direction.

[0056] In combination with the accompanying drawings Figure 1 In some embodiments of the utility model, the entrance end 31a of the incident section 31 comprises a first side surface 311, a second side surface 312, a third side surface 313 and a fourth side surface 314 connected in sequence around the axis of the ejector section 33, the first side surface 311 and the third side surface 313 are arranged opposite to each other along the second direction, and the second side surface 312 and the fourth side surface 314 are arranged opposite to each other along the third direction.

[0057] The first side surface 311 and / or the third side surface 313 are arranged as arc surfaces convex outward along the second direction. Specifically, the first side surface 311 and the third side surface 313 can be arranged opposite to each other along the height direction of the burner 100, and the burner 100 has sufficient space in the height direction, so the first side surface 311 and the third side surface 313 can be arranged as arc surfaces convex outward to expand the flow area of the entrance end 31a and facilitate the introduction of sufficient primary air through the entrance end 31a.

[0058] Further, the first side surface 311 and / or the third side surface 313 are arranged as first circular arc surfaces with the axis of the ejector section 33 as the center, which facilitates the uniform supply of primary air to the ejector section 33 through the entrance end 31a. Specifically, the nozzle of the burner 100 can be arranged opposite to the axis of the ejector section 33, which facilitates the uniform mixing of gas and primary air and improves the combustion stability of the burner 100.

[0059] One of the first side 311 and the third side 313 can be provided as a first circular arc surface centered on the axis of the injection section 33, or both the first side 311 and the third side 313 are provided as a first circular arc surface centered on the axis of the injection section 33. Preferably, both the first side 311 and the third side 313 are provided as a first circular arc surface centered on the axis of the injection section 33, which facilitates the injection section 33 to be uniformly provided with the primary air through the inlet end 31a, improves the mixing uniformity of the gas and the primary air, and improves the combustion stability of the combustor 100.

[0060] In combination Figure 1 And Figure 2 In some embodiments of the present application, the second side 312 and / or the fourth side 314 are provided as a plane, which facilitates the processing and forming of the combustor 100, and in addition, can reduce the space occupied by the inlet end 31a in the third direction, and maximally reduce the size of the combustor 100 in the thickness direction, facilitating the installation of the combustor 100.

[0061] One of the second side 312 and the fourth side 314 can be provided as a plane, or both the second side 312 and the fourth side 314 are provided as a plane. Preferably, both the second side 312 and the fourth side 314 are provided as a plane, and the second side 312 and the fourth side 314 are symmetrical in the third direction, which facilitates the processing and forming of the combustor 100, and facilitates the uniform introduction of the primary air through the inlet end 31a, and improves the mixing uniformity of the primary air and the gas.

[0062] In other embodiments of the present application, the second side 312 and / or the fourth side 314 are provided as a second circular arc surface, and the diameter of the second circular arc surface is greater than the diameter of the first circular arc surface, which can reduce the space occupied by the inlet end 31a in the third direction, reduce the size of the combustor 100 in the thickness direction, and facilitate the installation of the combustor 100.

[0063] One of the second side 312 and the fourth side 314 can be provided as a second circular arc surface, or both the second side 312 and the fourth side 314 are provided as a second circular arc surface. Preferably, both the second side 312 and the fourth side 314 are provided as a second circular arc surface, and the second side 312 and the fourth side 314 are symmetrical in the third direction, which facilitates the uniform introduction of the primary air through the inlet end 31a.

[0064] Optionally, the inlet end 31a of the injection section 31 is provided as an ellipse with a long axis extending in the second direction and a short axis extending in the third direction, which facilitates the reduction of the size of the inlet end 31a of the injection section 31 in the third direction, and in turn reduces the space occupied by the combustor 100 in the thickness direction, facilitating the installation of the combustor 100.

[0065] Optionally, the entrance end 31a of the incident section 31 is rectangular. The long side of the rectangle extends along the second direction, and the short side extends along the third direction, so as to reduce the size of the entrance end 31a of the incident section 31 along the third direction, thereby reducing the space occupied by the burner 100 in the thickness direction, and facilitating the installation of the burner 100.

[0066] In some embodiments of the present application, the ratio of the size value L312 to the size value L313 satisfies 1

[0067] In some embodiments of the present application, the size value L312 and the diameter size value D1 of the throat 32 satisfy 3 2 ≤3.5. Specifically, the incident section 31 is provided as a tapered pipe extending along the first direction to the throat 32. After the primary air and the fuel gas enter the ejection flow channel 30 from the entrance end 31a, the flow rate of the gas increases, and the pressure decreases, so that the primary air and the fuel gas are smoothly sucked in and mixed in the ejection flow channel 30. Specifically, (L312 / D1) 2 is greater than or equal to 3, so as to obtain the best primary air suction effect through the entrance end 31a; (L312 / D1) 2 is less than or equal to 3.5, so as to avoid affecting the efficiency of primary air suction.

[0068] In combination Figure 1 , in some embodiments of the present application, the ejection section 33 and the distribution flow channel 20 are provided with a gas collecting cavity 40, the gas collecting cavity 40 communicates the ejection section 33 and the distribution flow channel 20, the fuel gas mixed with the primary air can be further mixed uniformly in the gas collecting cavity 40 after passing through the ejection section 33, and is distributed to the fire hole 10 through the distribution flow channel 20 for combustion, thereby improving the combustion stability of the burner 100.

[0069] The second flat portion 41 is provided on at least one side of the gas collecting cavity 40 along the third direction, and the second flat portion 41 does not protrude into the incident section 31 in the projection along the first direction. Specifically, the second flat portion 41 can be provided on one side of the gas collecting cavity 40 along the third direction, or the second flat portion 41 can be provided on both sides of the gas collecting cavity 40 along the third direction. By providing the second flat portion 41, the size of the burner 100 along the third direction can be reduced, the space occupied by the burner 100 in the thickness direction can be reduced, and the processing and forming of the burner 100 are facilitated.

[0070] In combination Figure 9 For example, the burner 100 can be used in a cooking device. By reducing the space occupied by the burner 100 in the thickness direction, the installation of the burner 100 is facilitated, and the space utilization of the cooking device is improved.

[0071] In some embodiments of the present application, the inlet end of the incident section is provided with a first flat portion on both sides along the third direction, the first flat portion is a straight section along the second direction, and the gas collecting cavity is provided with a second flat portion on both sides along the third direction, and the second flat portion does not protrude into the first flat portion in the projection along the first direction. Preferably, in the projection along the first direction, the second flat portion coincides with the first flat portion, which facilitates the improvement of the injection performance of the burner, reduces the size of the burner along the third direction, makes the structure of the burner compact, and improves the space utilization. The thickness of the burner is small, which facilitates the installation of the burner in the gas oven and improves the installation efficiency of the burner.

[0072] In combination Figure 4 In the present application, the size of the incident section 31 along the first direction is L311, the size of the throat 32 along the first direction is L321, the size of the injection section 33 along the first direction is L331, and the diameter of the throat 32 is D1.

[0073] In some embodiments of the present application, 4≤(L331+L321) / D1≤6, which optimizes the injection channel 30 of the gas and the primary air and improves the injection effect of the burner 100. Wherein, (L331+L321) / D1 is greater than or equal to 4, the size of the throat 32 and the injection section 33 along the first direction is the injection length of the injection channel 30, by setting the injection length and the diameter of the throat 32 within a reasonable range, the injection effect of the burner 100 is improved, and the gas and the primary air are mixed uniformly; (L331+L321) / D1 is less than or equal to 6, which avoids that the injection length is too long and occupies too much space of the burner 100, and is not conducive to the injection of the gas.

[0074] In still some embodiments of the utility model, 1<=L311 / D1<=2, the ejecting effect of the burner 100 is improved by optimizing the ejecting flow channel 30. Wherein, L311 / D1 is greater than or equal to 1, the effect of the incident section 31 ejecting primary air can be optimized, and the burner 100 is provided with reasonable primary air. L311 / D1 is less than or equal to 2, the size of the incident section 31 is avoided to be too long, and the ejecting ability of the gas is reduced.

[0075] In combination Figure 3 In some embodiments of the utility model, the burner 100 further includes a communication groove 50, the communication groove 50 extends along the first direction and communicates with the plurality of fire holes 10. The communication groove 50 connects the plurality of fire holes 10 and the distribution flow channel 20, the gas flow distributed through the distribution flow channel 20 enters the communication groove 50 and then enters the fire hole 10, the communication groove 50 can play a steady flow effect, and the stability of the gas flow of the fire hole 10 is improved.

[0076] Specifically, the gas mixed with the primary air flows along the first direction and then enters the fire hole 10 along the second direction, the stability of the gas flow can be improved by setting the communication groove 50 between the distribution flow channel 20 and the fire hole 10, and the flame is more stable when igniting. In addition, the size of the flow channel in different regions of the distribution flow channel 20 can be different because the distribution flow channel 20 needs to distribute the gas flow along the first direction, and the size of the flow channel of the communication groove 50 can be a fixed size, that is, the size of the flow channel of the communication groove 50 is the same at each position in the first direction, and the stability of the gas flow between the communication groove 50 and the fire hole 10 can be improved, and the flame is more uniform when igniting.

[0077] In combination Figure 3 In some embodiments of the utility model, the side wall of the distribution flow channel 20 along at least one side of the third direction is provided with a boss 24 protruding inward. The boss 24 can play a flow limiting role. Specifically, the gas flow at the outlet of the ejecting flow channel 30 is relatively large, in order to improve the uniformity of the gas flow distribution along the first direction, the boss 24 is set to limit the flow, so that the mixed gas is more uniformly distributed along the first direction through the distribution flow channel 20, the uneven distribution of the firepower of the burner 100 is avoided, and the heating uniformity of the burner 100 is improved.

[0078] In combination Figure 4The distribution flow channel 20 includes a first flow channel 21, a second flow channel 22 and a third flow channel 23 which are communicated with each other, the first flow channel 21 is opposite to the boss 24 along the third direction, the first flow channel 21 is arranged between the second flow channel 22 and the communication groove 50, the third flow channel 23 is arranged on the side of the second flow channel 22 which is away from the ejecting flow channel 30 and is distributed with the communication groove 50 along the second direction.

[0079] In combination Figure 3 and Figure 4 In some embodiments of the utility model, the side wall of at least one side of the distribution flow channel 20 along the third direction is provided with a boss 24 which protrudes inward, the distribution flow channel 20 includes a first flow channel 21, a second flow channel 22 and a third flow channel 23 which are communicated with each other, the first flow channel 21 is opposite to the boss 24 along the third direction, the first flow channel 21 is arranged between the second flow channel 22 and the communication groove 50, the third flow channel 23 is arranged on the side of the second flow channel 22 which is away from the ejecting flow channel 30 and is distributed with the communication groove 50 along the second direction.

[0080] Specifically, the boss 24 can play a role of flow limiting, the first flow channel 21 is opposite to the boss 24 along the third direction, the gas flow of the outlet of the ejecting flow channel 30 is relatively large, the flow limiting of the gas flow is realized by arranging the boss 24, the flow passage area of the first flow channel 21 is small, the flow passage section of the second flow channel 22 is larger than that of the first flow channel 21, the mixed gas is more evenly distributed along the first direction through the distribution flow channel 20, the mixed gas is more evenly distributed along the first direction through the distribution flow channel 20, the uneven distribution of the firepower of the burner 100 is avoided, and the heating uniformity of the burner 100 is improved.

[0081] In combination Figure 5 and Figure 6 Further, the size value of the first flow channel 21 along the third direction is L21, the size value of the second flow channel 22 along the third direction is L22, the size value of the third flow channel 23 along the third direction is L23, and the size value of the communication groove 50 along the third direction is L50.

[0082] In some embodiments of the utility model, L21 < L22, the size of first flow channel 21 along third direction is less than the size of second flow channel 22 along third direction, in combination with the foregoing, first flow channel 21 is communicated with the outlet of injection flow channel 30, the size of first flow channel 21 along third direction is smaller, it is convenient to control the amount of airflow that enters fire hole 10 through first flow channel 21, thereby guaranteeing the uniformity of gas distribution and the stability of flame.

[0083] In combination with Figure 5 In some embodiments of the utility model, L21 < L23, the size of first flow channel 21 along third direction is less than the size of third flow channel 23 along third direction, it can be understood that third flow channel 23 is arranged on the side of second flow channel 22 away from injection flow channel 30, first flow channel 21 is closer to the outlet of injection flow channel 30 relative to third flow channel 23, during the flow of gas along first direction, there will be loss of kinetic energy, by setting the size of third flow channel 23 along third direction to be greater than the size of first flow channel 21 along third direction, it is convenient to guarantee the uniformity of gas distribution and the stability of flame.

[0084] In combination with Figure 5 In some embodiments of the utility model, L21 < L50, first flow channel 21 is communicated with the outlet of injection flow channel 30, the flow velocity of airflow of the outlet of injection flow channel 30 is higher, by reducing the size of first flow channel 21 along third direction, the airflow of first flow channel 21 is throttled, it is convenient to control the amount of airflow that enters fire hole 10 through first flow channel 21, thereby guaranteeing the uniformity of gas distribution and the stability of flame, in addition, it also plays the role of flow stabilization through communicating groove 50.

[0085] In combination with Figure 6 In some embodiments of the utility model, L50 < L22, second flow channel 22 can be used to distribute airflow to third flow channel 23, by setting the size of second flow channel 22 along third direction to be less than the size of communicating groove 50 along third direction, the distribution of gas is optimized, the flow of gas entering third flow channel 23 is controlled, it is convenient to distribute gas to multiple fire holes 10 evenly through distribution flow channel 20, the heating uniformity of burner 100 is improved.

[0086] In combination with Figure 6 In some embodiments of the utility model, L50 < L23, gas passes through third flow channel 23 and is supplied to fire hole 10 above it through communicating groove 50, because third flow channel 23 is far away from the outlet of injection flow channel 30, by setting the size of third flow channel 23 along third direction to be less than the size of communicating groove 50 along third direction, the distribution of gas is optimized, the flow of gas entering fire hole 10 is controlled, it is convenient to distribute gas to multiple fire holes 10 evenly through distribution flow channel 20, the heating uniformity of burner 100 is improved.

[0087] In combination withFigure 3 And Figure 4 In some embodiments of the utility model, the combustor 100 further includes a gas collecting cavity 40, which is arranged between the ejector flow channel 30 and the distribution flow channel 20 and communicates with the ejector flow channel 30, the first flow channel 21, the second flow channel 22 and the communication groove 50. The gas mixed with primary air can be further mixed uniformly in the gas collecting cavity 40 after passing through the ejector flow channel 30 and is distributed to the fire hole 10 through the distribution flow channel 20 for combustion, thereby improving the combustion stability of the combustor 100.

[0088] In combination Figure 7 Further, the size value of the gas collecting cavity 40 along the third direction is L40, the size value of the first flow channel 21 along the third direction is L21, the size value of the second flow channel 22 along the third direction is L22, and the size value of the communication groove 50 along the third direction is L50,

[0089] Wherein, L21 < L40, the size of the gas collecting cavity 40 along the third direction is larger, the flow cross-sectional area of the gas flow is larger, the uniform mixing of the gas from the ejector flow channel 30 with the primary air is facilitated, the size value of the first flow channel 21 along the third direction is smaller, the flow of the gas flow into the first flow channel 21 is limited, and the uniform distribution of the gas in the first direction is realized.

[0090] In some embodiments, L22 < L40, the size of the gas collecting cavity 40 along the third direction is larger, the flow cross-sectional area of the gas flow is larger, the uniform mixing of the gas with the primary air is facilitated, the size value of the second flow channel 22 along the third direction is smaller, the distribution of the gas flow is uniform, and the uniform distribution of the gas in the first direction is realized.

[0091] In some embodiments, L50 < L40, the size of the gas collecting cavity 40 along the third direction is larger, the flow cross-sectional area of the gas flow is larger, the uniform mixing of the gas with the primary air is facilitated, the size value of the communication groove 50 along the third direction is smaller relative to the size value of the gas collecting cavity 40 along the third direction, the gas in the gas collecting cavity 40 is uniformly distributed to the multiple fire holes 10 after being distributed through the distribution flow channel 20, the gas flow is arranged through the communication groove 50, and the stability of the flame is improved.

[0092] In combination Figure 6 In some embodiments, L50 < L23, the gas passes through the third flow channel 23 and is supplied to the fire hole 10 above it through the communication groove 50, the third flow channel 23 is far away from the outlet of the ejector flow channel 30, the size of the third flow channel 23 along the third direction is set to be smaller than the size of the communication groove 50 along the third direction, the distribution of the gas is optimized, the flow of the gas into the fire hole 10 is controlled, the gas is uniformly distributed to the multiple fire holes 10 through the distribution flow channel 20, and the heating uniformity of the combustor 100 is improved.

[0093] In combinationFigure 7 In some embodiments, L50 < L22, the second flow channel 22 can be used to distribute the gas flow to the third flow channel 23, by setting the size of the second flow channel 22 along the third direction to be greater than the size of the communication groove 50 along the third direction, optimizing the distribution of the gas, optimizing the flow of the gas into the third flow channel 23, facilitating the uniform distribution of the gas to the plurality of fire holes 10 through the distribution flow channel 20, and improving the heating uniformity of the burner 100.

[0094] In combination Figure 8 And Figure 9 According to the gas oven 1000 of the embodiment of the utility model, the body 200 is provided with a cooking cavity 210 and a combustion chamber 220, the combustion chamber 220 is communicated with the cooking cavity 210, the fan 300 is configured to drive the flue gas to circulate between the cooking cavity 210 and the combustion chamber 220, and the burner 100 is arranged in the combustion chamber 220. The cooking cavity 210 can be used to place food and heat the food, the burner 100 burns to generate high-temperature gas, the high-temperature gas can be sent from the combustion chamber 220 to the cooking cavity 210 through the fan 300, the backflow air in the cooking cavity 210 is mixed and circulated with the high-temperature flue gas in the combustion chamber 220, the food in the cooking cavity 210 can be heated through the flowing hot air, and the cooking efficiency and the heating uniformity of the gas oven 1000 are improved. Wherein, the fan 300 also generates negative pressure in the combustion chamber 220 during the working process, which facilitates the burner 100 to draw more primary air, the inlet end 31a of the incident section 31 serves as the inlet of the primary air, and under the action of the fan 300, the flow passage area thereof can be reduced without affecting the suction capacity of the injection flow channel 30. Specifically, the size of the inlet end 31a of the incident section 31 along the third direction can be reduced, the size of the burner 100 in the thickness direction can be reduced, and the suction capacity of the injection flow channel 30 for the primary air is not affected.

[0095] In addition, the burner 100 is arranged in the combustion chamber 220, by reducing the size of the burner 100 in the thickness direction, the burner 100 can avoid occupying too much space in the combustion chamber 220, and the installation of the burner 100 is facilitated.

[0096] The various embodiments / embodiments of the utility model can be combined with each other without contradiction.

[0097] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0098] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0099] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the communication or interaction relationship between two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0100] In the utility model, unless otherwise specifically defined and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0101] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like 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 application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples, without contradiction.

[0102] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.

Claims

1. A burner (100), characterized in that, include: Multiple fire holes (10) are distributed along a first direction; Distribution channel (20), the distribution channel (20) and the plurality of fire holes (10) are distributed along a second direction; An ejector channel (30) is provided, which is distributed along the first direction with the distribution channel (20). The ejector channel (30) includes an incident section (31), a throat (32), and an ejector section (33). The incident section (31) is a tapered channel extending along the first direction to connect with the throat (32). The ejector section (33) is a tapered channel with one end connected to the throat (32) and extending along the first direction. The other end of the ejector section (33) is connected to the distribution channel (20). Wherein, the size value L313 of the entrance end (31a) of the incident section (31) along the third direction is smaller than the size value L312 along the second direction, and the first direction, the second direction and the third direction are perpendicular to each other.

2. The burner (100) according to claim 1, characterized in that, The inlet end (31a) of the incident section (31) is provided as a first flat portion (315) on at least one side along the third direction. The distance between the middle part of the first flat portion (315) and the axis of the ejector channel (30) along the second direction is less than the distance between the end and the axis of the ejector channel (30).

3. The burner (100) according to claim 2, characterized in that, The first flat portion (315) is configured as a straight segment or an arc segment extending along the second direction.

4. The burner (100) according to claim 1 or 2, characterized in that, The entrance end (31a) of the incident section (31) includes a first side (311), a second side (312), a third side (313) and a fourth side (314) connected in sequence around the axis of the ejector section (33). The first side (311) and the third side (313) are arranged opposite to each other along the second direction, and the second side (312) and the fourth side (314) are arranged opposite to each other along the third direction. The first side (311) and / or the third side (313) are set as an arc surface that convexes outward in the middle along the second direction.

5. The burner (100) according to claim 4, characterized in that, The first side surface (311) and / or the third side surface (313) are configured as a first arc surface centered on the axis of the ejector segment (33). Wherein, the second side surface (312) and / or the fourth side surface (314) are provided as planes; or, the second side surface (312) and / or the fourth side surface (314) are provided as second arc surfaces, the diameter of the second arc surface being larger than the diameter of the first arc surface.

6. The burner (100) according to claim 1 or 2, characterized in that, The entrance end (31a) of the incident section (31) is configured as an ellipse with its major axis extending along the second direction and its minor axis extending along the third direction. Alternatively, the entrance end (31a) of the incident section (31) may be rectangular.

7. The burner (100) according to claim 1, characterized in that, The ratio of the dimension value L312 to the dimension value L313 satisfies 1 < L312 / L313 ≤ 1.38; And / or, the dimension value L312 and the diameter dimension value D1 of the throat (32) satisfy 3 ≤ (L312 / D1) 2 ≤3.

5.

8. The burner (100) according to claim 1, characterized in that, A gas collecting cavity (40) is provided between the ejector section (33) and the distribution channel (20). The gas collecting cavity (40) connects the ejector section (33) and the distribution channel (20). The gas collecting cavity (40) has a second flat portion (41) on at least one side along the third direction. In the projection along the first direction, the second flat portion (41) does not protrude from the incident section (31).

9. The burner (100) according to claim 1, characterized in that, The dimension of the incident section (31) along the first direction is L311, the dimension of the throat (32) along the first direction is L321, the dimension of the ejector section (33) along the first direction is L331, and the diameter of the throat (32) is D1. Where 4≤(L331+L321) / D1≤6; or 1≤L311 / D1≤2.

10. The burner (100) according to claim 1, characterized in that, The burner (100) further includes a connecting groove (50) that extends along the first direction and connects to the plurality of fire holes (10).

11. The burner (100) according to claim 10, characterized in that, The distribution channel (20) has an inwardly protruding boss (24) on at least one side wall along the third direction. The distribution channel (20) includes a first channel (21), a second channel (22), and a third channel (23) that are interconnected. The first channel (21) is opposite to the boss (24) along the third direction. The first channel (21) is located between the second channel (22) and the connecting groove (50). The third channel (23) is located on the side of the second channel (22) away from the ejector channel (30) and is distributed along the second direction with the connecting groove (50).

12. The burner (100) according to claim 11, characterized in that, The dimension of the first flow channel (21) along the third direction is L21, the dimension of the second flow channel (22) along the third direction is L22, the dimension of the third flow channel (23) along the third direction is L23, and the dimension of the connecting groove (50) along the third direction is L50. Wherein, L21 < L22; and / or, L21 < L23; and / or, L21 < L50; and / or, L50 < L22; and / or, L50 < L23.

13. The burner (100) according to claim 11, characterized in that, The burner (100) further includes a gas collecting chamber (40), which is located between the ejector channel (30) and the distribution channel (20) and connects the ejector channel (30), the first channel (21), the second channel (22) and the connecting groove (50).

14. The burner (100) according to claim 13, characterized in that, The gas collecting chamber (40) has a dimension of L40 along the third direction, the first flow channel (21) has a dimension of L21 along the third direction, the second flow channel (22) has a dimension of L22 along the third direction, and the connecting groove (50) has a dimension of L50 along the third direction. Where L21 < L40; and / or, L22 < L40; and / or, L50 < L40; and / or, L50 < L23; and / or, L50 < L22.

15. A gas-fired oven (1000), characterized in that, include: The body (200) is provided with a cooking chamber (210) and a combustion chamber (220), the combustion chamber (220) being connected to the cooking chamber (210); A fan (300) configured to drive flue gas to circulate between the cooking chamber (210) and the combustion chamber (220); The burner (100) according to any one of claims 1-14 is disposed in the combustion chamber (220).

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