Infrared burner

Abstract

The invention relates to the technical field of combustors, and particularly discloses an infrared combustor which comprises a frame body, a combustion-supporting gas supply part, a gas supply part and an infrared combustion part. The frame body comprises a bearing part and a gas injection part arranged on the bearing part, and a plurality of premixed gas injection openings are formed in the gas injection part; combustion-supporting gas flow channels and fuel gas flow channels which are in one-to-one correspondence with the premixed gas injection openings are formed in the bearing part and the gas injection part; combustion-supporting gas in the corresponding combustion-supporting gas flow channels and fuel gas in the fuel gas flow channels are mixed at the premixed gas injection openings and then are injected out; the combustion-supporting gas supply part and the gas supply part are arranged on the bearing part; the infrared combustion part is arranged on the bearing part and surrounds the gas injection part, an arc-shaped combustion face is arranged on the infrared combustion part, and premixed gas is injected to the arc-shaped combustion face from the premixed gas injection opening at a preset angle. The infrared burner is high in heating efficiency and low in backfire risk, low-temperature combustion-supporting gas can exchange heat with the frame body, and the stability of the frame body is improved.

Description

Technical Field

[0001] The invention relates to the technical field of burners, and in particular to an infrared burner. Background Art

[0002] The basic structure of a traditional infrared burner is: a porous infrared combustion disk is arranged in the furnace (porous infrared ceramic radiation plates are generally used), the combustion zone is above the infrared combustion disk, and the mixing chamber is below the infrared combustion disk. Self-aspirated air enters the mixing chamber through the induced draft tube, and the gas entering from the gas inlet pipe is mixed with air in the mixing chamber, and then passes through the small holes on the infrared combustion disk and burns in the combustion zone.

[0003] However, the infrared burner with this structure needs to ensure that the premixed gas is distributed as evenly as possible inside the infrared combustion disk. Once uneven distribution occurs, it will cause insufficient combustion in the infrared combustion disk, which will lead to the appearance of a "dark area" with a temperature lower than other areas, making the infrared combustion disk prone to breakage under its own thermal stress. Therefore, before the premixed gas enters the infrared combustion disk, it needs to have a circulation channel with the same area as the infrared combustion disk. This oversized premixed gas circulation channel makes the flow rate of the premixed gas slower, resulting in a lower "convective heat transfer" capacity, affecting the heating efficiency of the burner. In addition, the distance from the mixing chamber to the combustion surface of the traditional burner is long, and there is a large amount of mixed gas in the mixing chamber. The risk of flashback is relatively high. Once flashback occurs, the mixing chamber will flash over.

[0004] In addition, after long-term use, the temperature of the infrared burner becomes higher and higher, and the high temperature is maintained for a long time, which will affect the stability of the metal frame of the infrared burner and endanger the health of the operator.

[0005] Therefore, it is urgent to propose an infrared burner to solve the above-mentioned technical problems. Summary of the invention

[0006] The present invention provides an infrared burner, wherein the premixed gas can be ejected at high speed for combustion, thereby improving the heating efficiency of the infrared burner; the combustion-supporting gas and the fuel gas are mixed at a premixed gas injection port and then used for combustion, without a large amount of mixed gas existing, and the risk of flashback is low; and the low-temperature combustion-supporting gas can exchange heat with a frame, thereby improving the stability of the frame and preheating the combustion-supporting gas.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] Infrared burner, comprising:

[0009] The frame includes a bearing portion and a gas injection portion arranged on the bearing portion, wherein the gas injection portion is provided with a plurality of premixed gas injection ports; the bearing portion and the gas injection portion are provided with combustion-supporting gas flow channels and fuel gas flow channels corresponding to the premixed gas injection ports, and the corresponding combustion-supporting gas flow channels and fuel gas in the fuel gas flow channels are mixed at the premixed gas injection ports and then injected;

[0010] An auxiliary gas supply unit is provided on the bearing unit and is used to transport low-temperature auxiliary gas into the plurality of auxiliary gas flow channels;

[0011] A gas supply unit, disposed on the bearing unit, and configured to deliver gas to the plurality of gas flow passages;

[0012] An infrared combustion element is arranged on the supporting portion and surrounded by the gas injection portion. An arc-shaped combustion surface is provided on the infrared combustion element. The arc-shaped combustion surface is located below the premixed gas injection port. The premixed gas is sprayed from the premixed gas injection port to the starting end of the arc-shaped combustion surface at a preset angle, and is guided by the arc-shaped combustion surface and thrown out from the tail end of the arc-shaped combustion surface.

[0013] Optionally, the bearing portion and the gas injection portion are in an inverted "T" shaped structure, the infrared combustion parts are provided on opposite sides of the gas injection portion, a part of the multiple premixed gas injection ports are first premixed gas injection ports, and the other part are second premixed gas injection ports, the first premixed gas injection ports and the second premixed gas injection ports are respectively located on opposite sides of the gas injection portion, and are used to respectively inject the premixed gas onto the corresponding infrared combustion parts.

[0014] Optionally, the supporting gas supply part comprises a first supporting gas supply part and a second supporting gas supply part arranged at both ends of the bearing part, the first supporting gas supply part and the bearing part enclose a first supporting gas confluence cavity, and the second supporting gas supply part and the bearing part enclose a second supporting gas confluence cavity;

[0015] A part of the plurality of combustion-supporting gas flow passages is a first combustion-supporting gas flow passage, and another part is a second combustion-supporting gas flow passage, the first combustion-supporting gas flow passage is arranged in the bearing portion on one side of the gas injection portion and in the gas injection portion, the inlet of the first combustion-supporting gas flow passage is communicated with the first combustion-supporting gas confluence chamber, the outlet of the first combustion-supporting gas is communicated with the first premixed gas injection port, the second combustion-supporting gas flow passage is arranged in the bearing portion on the other side of the gas injection portion and in the gas injection portion, the inlet of the second combustion-supporting gas flow passage is communicated with the second combustion-supporting gas confluence chamber, and the outlet of the second combustion-supporting gas flow passage is communicated with the second premixed gas injection port;

[0016] The gas supply part is arranged on the bearing part, and is arranged on two opposite sides of the bearing part with the gas injection part, and the gas supply part and the bearing part form a gas confluence cavity;

[0017] The gas flow passages are arranged in the bearing portion and the gas injection portion, the inlets of all the gas flow passages are connected to the gas confluence cavity, the outlets of some of the gas flow passages are connected to the first premixed gas injection port, and the outlets of another part of the gas flow passages are connected to the second premixed gas injection port.

[0018] Optionally, the first combustion-supporting gas flow channel includes a first outlet section connected to the first premixed gas injection port, and the second combustion-supporting gas flow channel includes a second outlet section connected to the second premixed gas injection port; the fuel gas flow channel includes a fuel gas outlet section, a portion of the fuel gas outlet section is connected to the first outlet section and is arranged at an angle, and another portion of the fuel gas outlet section is connected to the second outlet section and is arranged at an angle.

[0019] Optionally, the plurality of first combustion-supporting gas flow channels and the plurality of second combustion-supporting gas flow channels are arranged in parallel and at intervals along the length direction of the frame, and the first combustion-supporting gas flow channels and the second combustion-supporting gas flow channels are arranged alternately.

[0020] Optionally, the bearing portion and the gas injection portion are an integrated structure.

[0021] Optionally, the infrared combustion element is a porous structure, and the porosity of the infrared combustion element is less than or equal to 80%.

[0022] Optionally, the arc-shaped combustion surface includes a first plane, a second plane, and an arc surface smoothly connected to the first plane and the second plane, and the angle between the first plane and the second plane is 60°-120°.

[0023] Optionally, the arc-shaped combustion surface is provided with a plurality of arc-shaped grooves arranged at intervals, and the arc-shaped grooves extend along the bending direction of the arc-shaped combustion surface.

[0024] Optionally, the width of the arc groove is 3mm-15mm.

[0025] Optionally, the infrared burning member has a thickness of 5 mm to 20 mm at the position where the arc groove is provided.

[0026] Optionally, a guide arm is provided on the gas injection portion below the premixed gas injection port, and a guide member is also provided on the gas injection portion, the guide member includes a guide plate located above the premixed gas injection port, and the guide plate and the guide arm are used to guide the premixed gas to spray toward the arc-shaped combustion surface at the preset angle.

[0027] Optionally, the infrared burner further comprises:

[0028] There are multiple external heat insulation blocks, and the multiple external heat insulation blocks are detachably connected to the bearing part. The external heat insulation blocks are provided with fixing grooves. The multiple external heat insulation blocks are spliced ​​and arranged so that the multiple fixing grooves surround a combustion element installation space, and the combustion element installation space is used to fix the infrared combustion element;

[0029] The inner heat-insulating block is arranged between the gas injection part and the infrared combustion component. The inner heat-insulating block and a plurality of the outer heat-insulating blocks clamp and fix the infrared combustion component.

[0030] Optionally, a card slot is provided on the outer wall of the external insulation block, and a connecting plate is correspondingly arranged for each external insulation block. The first end of the connecting plate is bent to form a card segment, and the card segment is carded in the card slot. The connecting piece is passed through the second end of the connecting plate and is connected to the side wall of the bearing part.

[0031] The beneficial effects of the present invention are:

[0032] The present invention provides an infrared burner, comprising a frame, a combustion-supporting gas supply portion, a gas supply portion and an infrared combustion element. The frame comprises a bearing portion and a gas injection portion, and a plurality of premixed gas injection ports are provided on the gas injection portion, and the premixed gas injection ports can spray the premixed gas onto the arc-shaped combustion surface of the infrared combustion element at a preset angle, and throw it out under the guidance of the arc-shaped combustion surface. With such a configuration, on the one hand, the premixed gas can be brought into contact with the infrared combustion element as much as possible to achieve combustion on the infrared combustion element, thereby improving the infrared radiation performance of the infrared combustion element; on the other hand, the premixed gas can be sprayed from the premixed gas injection port onto the arc-shaped combustion surface at a relatively high speed, thereby achieving an impact effect on the premixed gas, forcing the premixed gas to be thrown out from the tail end of the arc-shaped combustion surface under the guidance of the arc-shaped combustion surface, thereby enhancing the convection heat exchange effect of the infrared burner.

[0033] In addition, the bearing part and the gas injection part are provided with a combustion-supporting gas flow channel and a fuel gas flow channel corresponding to the premixed gas injection port, and the combustion-supporting gas in the combustion-supporting gas flow channel and the fuel gas in the fuel gas flow channel are mixed at the premixed gas injection port and then ejected. With such a configuration, on the one hand, the low-temperature characteristics of the combustion-supporting gas can be used to cool the frame, which can not only improve the stability of the frame under high temperature conditions, but also improve the energy utilization efficiency; on the other hand, the combustion-supporting gas flow channel and the fuel gas flow channel are integrated inside the frame, which has a high heat exchange efficiency, a simple structure, and is easy to process, and does not increase the volume of the infrared burner; on the other hand, the combustion-supporting gas and the fuel gas are independent of each other inside the frame, which can effectively avoid the problem of backfire. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1A schematic diagram of the structure of an infrared burner provided in an embodiment of the present invention;

[0035] Figure 2 A front view of an infrared burner provided by an embodiment of the present invention;

[0036] Figure 3 A side view of an infrared burner provided by an embodiment of the present invention;

[0037] Figure 4 for Figure 3 A cross-sectional view at AA (showing the first combustion-supporting gas flow passage);

[0038] Figure 5 for Figure 3 A cross-sectional view at BB (showing the second combustion-supporting gas flow passage);

[0039] Figure 6 It is the main view of the frame;

[0040] Figure 7 for Figure 6 A partial view of the cross-sectional view at CC;

[0041] Figure 8 for Figure 6 A partial view of the cross-sectional view at DD;

[0042] Fig. 9 A schematic diagram of the structure of an infrared combustion element provided in an embodiment of the present invention;

[0043] Fig.10 A front view of an infrared combustion element provided by an embodiment of the present invention;

[0044] Fig.11 for Fig.10 A partial schematic diagram of a cross-sectional view at EE;

[0045] Fig.12 A partially exploded schematic diagram of an infrared burner provided in an embodiment of the present invention.

[0046] In the figure:

[0047] 100, frame; 101, first combustion-supporting gas flow channel; 1011, first outlet section; 102, second combustion-supporting gas flow channel; 1021, second outlet section; 103, combustion gas flow channel; 1031, combustion gas outlet section; 110, bearing portion; 120, gas injection portion; 121, first gas injection port; 122, second gas injection port; 123, flow guide arm; 130, bracket; 140, end plate;

[0048] 210, first combustion-supporting gas supply part; 211, first combustion-supporting gas confluence chamber; 220, second combustion-supporting gas supply part; 221, second combustion-supporting gas confluence chamber;

[0049] 300, gas supply unit; 310, gas confluence chamber;

[0050] 400, infrared combustion element; 410, arc-shaped combustion surface; 411, first plane; 412, second plane; 413, arc surface; 420, arc-shaped groove; 430, step structure;

[0051] 500, guide member; 510, guide plate;

[0052] 600, external heat insulation block; 610, fixing slot; 620, card slot;

[0053] 700, internal insulation block;

[0054] 800, connecting plate; 810, clamping section;

[0055] 900, connector;

[0056] 1000, ignition electrode;

[0057] 1100. Flame detection components. DETAILED DESCRIPTION

[0058] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0059] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0060] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0062] The present embodiment provides an infrared burner, whose premixed gas can be ejected at high speed for combustion, thereby improving the heating efficiency of the infrared burner; the combustion-supporting gas and the fuel gas are mixed at the premixed gas injection port and used for combustion, without a large amount of mixed gas existing and with a low risk of flashback; and the low-temperature combustion-supporting gas can exchange heat with the frame, thereby improving the stability of the frame and preheating the combustion-supporting gas.

[0063] Specifically, Figure 1-Figure 8 As shown, the infrared burner includes a frame 100 , a combustion-supporting gas supply portion, a gas supply portion 300 and an infrared combustion element 400 .

[0064] The frame 100 includes a bearing portion 110 and a gas injection portion 120 disposed on the bearing portion 110, and a plurality of premixed gas injection ports are disposed on the gas injection portion 120. The bearing portion 110 and the gas injection portion 120 are provided with a combustion-supporting gas flow channel and a fuel gas flow channel 103 corresponding to the premixed gas injection ports, and the combustion-supporting gas in the corresponding combustion-supporting gas flow channel and the fuel gas in the fuel gas flow channel 103 are mixed at the premixed gas injection port and then ejected. With such a configuration, on the one hand, the low temperature characteristics of the combustion-supporting gas can be utilized to cool the frame 100, which can not only improve the stability of the frame 100 under high temperature conditions, but also improve the energy utilization efficiency; on the other hand, the combustion-supporting gas flow channel and the fuel gas flow channel 103 are integrated inside the frame 100, the heat exchange efficiency is high, and the structure is simple, which is easy to process, and at the same time, the volume of the infrared burner will not be increased; on the other hand, the combustion-supporting gas and the fuel gas are independent of each other inside the frame 100, and there will not be a large amount of mixed gas, which can effectively avoid the problem of backfire.

[0065] The gas supply unit and the fuel gas supply unit 300 are both disposed on the carrier unit 110 . The gas supply unit is used to deliver low-temperature gas to the plurality of gas flow channels. The fuel gas supply unit 300 is used to deliver fuel gas to the plurality of fuel flow channels 103 .

[0066] The infrared combustion element 400 is arranged on the bearing part 110 and surrounded by the gas injection part 120. The infrared combustion element 400 is provided with an arc-shaped combustion surface 410, which is located below the premixed gas injection port. The premixed gas is sprayed from the premixed gas injection port to the beginning of the arc-shaped combustion surface 410 at a preset angle, and is thrown out from the tail end of the arc-shaped combustion surface 410 under the guidance of the arc-shaped combustion surface 410. With such a configuration, on the one hand, the premixed gas can be in contact with the infrared combustion element 400 as much as possible to achieve combustion on the infrared combustion element 400, thereby improving the infrared radiation performance of the infrared combustion element 400; on the other hand, the premixed gas can be sprayed from the premixed gas injection port to the arc-shaped combustion surface 410 at a high speed, thereby achieving an impact effect on the premixed gas, forcing the premixed gas to be thrown out from the tail end of the arc-shaped combustion surface 410 under the guidance of the arc-shaped combustion surface 410, thereby enhancing the convection heat exchange effect of the infrared burner.

[0067] It can be understood that this solution in which the premixed gas is thrown out at high speed and burned on the curved combustion surface 410 of the infrared combustion element 400 produces lower infrared radiation than the traditional solution of burning in a foam ceramic body, but the combustion temperature is higher, and is more suitable for scenarios that do not require too much infrared heating, such as heating some materials that are not sensitive to infrared.

[0068] Optionally, continue to see Figure 4-Figure 6 In this embodiment, the bearing part 110 and the gas injection part 120 are in an inverted "T" shape. Infrared burning parts 400 are provided on opposite sides of the gas injection part 120. Figure 4 and Figure 5 Taking the illustrated position as an example, infrared combustion components 400 are disposed on the supporting parts 110 on both sides of the gas injection part 120 .

[0069] A portion of the plurality of premixed gas injection ports is a first premixed gas injection port, and another portion is a second premixed gas injection port. The first premixed gas injection port and the second premixed gas injection port are located at opposite sides of the gas injection portion 120, respectively. Figure 4 and Figure 5 Taking the shown orientation as an example, the first premixed gas injection port is arranged on the left side of the gas injection portion 120, and is used to inject premixed gas onto the infrared combustion element 400 located on the left side of the gas injection portion 120. The second premixed gas injection port is arranged on the right side of the gas injection portion 120, and is used to inject premixed gas onto the infrared combustion element 400 located on the right side of the gas injection portion 120.

[0070] The supporting part 110 and the gas injection part 120 are arranged in an inverted "T" shape, which is convenient for arranging the infrared combustion element 400 on the supporting part 110. In addition, the infrared combustion element 400 can be designed to be a long strip similar to the shape of the supporting part 110, which is convenient for processing and installation.

[0071] Further, see Figure 4-Figure 8 The supporting gas supply unit includes a first supporting gas supply unit 210 and a second supporting gas supply unit 220 disposed at both ends of the supporting unit 110. Figure 4 and Figure 5 Taking the illustrated orientation as an example, the first supporting gas supply portion 210 is disposed at the left end of the carrying portion 110 , and the second supporting gas supply portion 220 is disposed at the right end of the carrying portion 110 .

[0072] Continue to see Figure 4 The first oxidizing gas supply part 210 and the bearing part 110 form a first oxidizing gas confluence chamber 211. A part of the plurality of oxidizing gas flow passages is the first oxidizing gas flow passage 101. The first oxidizing gas flow passage 101 is arranged in the bearing part 110 on one side of the gas injection part 120 and in the gas injection part 120. In this embodiment, the first oxidizing gas flow passage 101 is arranged in the bearing part 110 on the left side of the gas injection part 120 and in the gas injection part 120. Specifically, the inlet of the first oxidizing gas flow passage 101 is communicated with the first oxidizing gas confluence chamber 211, and the outlet of the first oxidizing gas flow passage 101 is communicated with the first premixed gas injection port.

[0073] Optionally, continue to see Figure 4 The first combustion-supporting gas flow channel 101 may include a first vertical section connected to the first combustion-supporting gas confluence chamber 211, a first horizontal section connected to the first vertical section and extending from the support portion 110 on the left side of the gas injection portion 120 to the gas injection portion 120, a second vertical section connected to the first horizontal section and extending in the gas injection portion 120, and a second horizontal section connected to the second vertical section, wherein the outlet of the second horizontal section is the first premixed gas injection port.

[0074] Continue to see Figure 5 , the second combustion-supporting gas supply part 220 and the bearing part 110 enclose a second combustion-supporting gas confluence chamber 221. Another part of the plurality of combustion-supporting gas flow passages is the second combustion-supporting gas flow passage 102, which is arranged in the bearing part 110 on the other side of the gas injection part 120 and in the gas injection part 120. In this embodiment, the second combustion-supporting gas flow passage 102 is arranged in the bearing part 110 on the right side of the gas injection part and in the gas injection part 120. Specifically, the inlet of the second combustion-supporting gas flow passage 102 is communicated with the second combustion-supporting gas confluence chamber 221, and the outlet of the second combustion-supporting gas is communicated with the second premixed gas injection port.

[0075] Optionally, continue to see Figure 5The second combustion-supporting gas flow channel 102 may include a third vertical section connected to the second combustion-supporting gas confluence chamber 221, a third horizontal section connected to the third vertical section and extending from the support portion 110 on the right side of the gas injection portion 120 to the gas injection portion 120, a fourth vertical section connected to the third horizontal section and extending along the gas injection portion 120, and a fourth horizontal section connected to the fourth vertical section, wherein the outlet of the fourth horizontal section is the second premixed gas injection port.

[0076] Continue to see Figure 4 and Figure 5 The gas supply part 300 is arranged on the bearing part 110, and the gas injection part 120 is arranged on two opposite sides of the bearing part 110. The gas supply part 300 and the bearing part 110 enclose a gas confluence cavity 310. The gas flow channel 103 is arranged in the bearing part 110 and the gas injection part 120. The inlet of all the gas flow channels 103 is connected to the gas confluence cavity 310, the outlet of a part of the gas flow channels 103 is connected to the first premixed gas injection port, and the outlet of another part of the gas flow channels 103 is connected to the second premixed gas injection port. Such an arrangement enables the gas flow channel 103 to be in a vertical straight line shape, which is convenient for processing and can shorten the length of the gas flow channel 103.

[0077] By respectively arranging the first combustion-supporting gas flow channel 101 and the second combustion-supporting gas flow channel 102 on the supporting part 110 on the left and right sides of the gas injection part 120, on the one hand, the contact area between the combustion-supporting gas flow channel and the supporting part 110 is increased, which is beneficial to improving the cooling effect of the combustion-supporting gas on the frame 100; on the other hand, the double-sided combustion-supporting gas supply method ensures that the flow channel length of the combustion-supporting gas on each side is not too long, which is beneficial to improving the supply efficiency of the combustion-supporting gas; on still another hand, it is convenient for processing on the frame 100.

[0078] It is worth mentioning that, continue to see Figure 4 Taking the first combustion-supporting gas flow channel 101 as an example, during the processing and forming process of the first combustion-supporting gas flow channel 101, the first combustion-supporting gas flow channel 101 is generally formed by drilling. Therefore, in order to facilitate processing, the first horizontal section of the first combustion-supporting gas flow channel 101 on the bearing portion 110 is generally drilled from the left side wall of the bearing portion 110 during processing, and then the opening on the left side wall of the bearing portion 110 is blocked with a plug after forming. Similarly, the processing method of the second vertical section of the first combustion-supporting gas flow channel 101 on the gas injection portion 120 is to start drilling on the top wall of the gas injection portion 120, and then the opening on the top wall of the gas injection portion 120 is blocked with a plug after forming. The processing method of the second combustion-supporting gas flow channel 102 is the same as that of the first combustion-supporting gas flow channel 101.

[0079] Optionally, the bearing portion 110 and the gas injection portion 120 may be an integrated structure for ease of processing.

[0080] Alternatively, if Figure 7 As shown, a plurality of first combustion-supporting gas flow channels 101 and a plurality of second combustion-supporting gas flow channels 102 are arranged in parallel and spaced apart along the length direction of the frame 100, and the first combustion-supporting gas flow channels 101 and the second combustion-supporting gas flow channels 102 are arranged alternately. Such arrangement, on the one hand, is convenient for processing; on the other hand, it makes the contact area between the combustion-supporting gas and the bearing part 110 larger, thereby improving the cooling effect of the combustion-supporting gas on the frame 100; on the other hand, it can make the flames on the opposite sides of the bearing part 110 more uniform.

[0081] Further, see Figure 8 The first combustion-supporting gas flow channel 101 includes a first outlet section 1011 connected to the first premixed gas injection port, and the second combustion-supporting gas flow channel 102 includes a second outlet section 1021 connected to the second premixed gas injection port. The fuel gas flow channel 103 includes a fuel gas outlet section 1031, a portion of the fuel gas outlet section 1031 is connected to the first outlet section 1011 and is arranged at an angle, and another portion of the fuel gas outlet section 1031 is connected to the second outlet section 1021 and is arranged at an angle. Such an arrangement is conducive to the full mixing of the fuel gas and the combustion-supporting gas, so as to reduce the risk of uneven combustion.

[0082] Furthermore, the infrared combustion element 400 is a porous structure, and the porosity of the infrared combustion element 400 is less than or equal to 80%. Compared with the porous ceramic plate with a porosity greater than 90% in the prior art, this arrangement reduces the infrared radiation performance to a certain extent, but increases the combustion temperature.

[0083] Optionally, the material of the infrared combustion element 400 may be one of silicon carbide (SiC), a combination of silicon nitride and silicon carbide (SiC+SiN4), alumina (Al2O3), ceramics and cordierite (Mg2Al4Si5O18).

[0084] The infrared temperature of the infrared combustion element 400 is usually determined by the air-fuel ratio (ratio of air and gas flow) and the power adjustment ratio of the infrared burner (ratio of the maximum power to the minimum power of a single infrared burner). According to test data, by adjusting the air-fuel ratio to 10-14 and the power adjustment ratio to be less than or equal to 12, the infrared temperature of the infrared combustion element 400 can be within the range of 800°C-1450°C.

[0085] Furthermore, if Figure 1 , Figure 2 , Fig. 9 and Fig.10As shown, in this embodiment, the arc-shaped combustion surface 410 includes a first plane 411, a second plane 412, and an arc surface 413 smoothly connected to the first plane 411 and the second plane 412, and the angle a between the first plane 411 and the second plane 412 is 60°-120°. Such a configuration can make the arc-shaped combustion surface 410 have less resistance to the premixed gas, which is conducive to the rapid flow of the premixed gas.

[0086] Furthermore, if Fig. 9 and Fig.11 As shown, the arc-shaped combustion surface 410 is provided with a plurality of arc-shaped grooves 420 arranged at intervals, and the arc-shaped grooves 420 extend along the bending direction of the arc-shaped combustion surface 410. By providing a plurality of arc-shaped grooves 420, the contact area between the arc-shaped combustion surface 410 and the premixed gas can be increased, thereby improving the infrared effect of the infrared combustion element 400. In addition, through the coordination of the arc-shaped combustion surface 410 and the arc-shaped grooves 420, the infrared combustion element 400 has a certain "binding property" on the combustion-supporting gas and the fuel gas, so that the combustion-supporting gas and the fuel gas stay on the infrared combustion element 400 for a certain period of time, and avoid the reduction of the infrared effect due to too short a stay time.

[0087] Optionally, continue to see Fig.11 The width b of the arc groove 420 may be 3 mm to 15 mm. For example, it may be 3 mm, 5 mm, 7 mm, 9 mm, 11 mm, 13 mm or 15 mm, etc., and may be set according to actual needs.

[0088] Optionally, continue to see Fig.11 The thickness c of the infrared burning member 400 at the position where the arc groove 420 is provided is 5 mm to 20 mm. For example, it can be 5 mm, 10 mm, 15 mm or 20 mm, etc., which can be set according to actual needs.

[0089] It is worth noting that b and c are positively correlated, that is, the larger b is, the larger c is.

[0090] Optionally, continue to see Fig.11 , the depth d of the arc groove 420 at the edge can be consistent with c.

[0091] Furthermore, if Figure 4 , Figure 5 and Fig.12As shown, on the gas injection part 120, a guide arm 123 is provided below the premixed gas injection port, and a guide member 500 is also provided on the gas injection part 120. The guide member 500 includes a guide plate 510 located above the premixed gas injection port, and the guide plate 510 and the guide arm 123 are used to guide the premixed gas to spray toward the arc-shaped combustion surface 410 at a preset angle. The guide plate 510 and the guide arm 123 jointly guide the injection direction of the premixed gas, and the guidance reliability is better. In addition, in addition to having the function of guiding the injection direction of the premixed gas, the guide arm 123 can also limit the landing point of the premixed gas on the arc-shaped combustion surface 410 to ensure that the premixed gas can fall at the beginning of the arc-shaped combustion surface 410 as required.

[0092] Alternatively, if Figure 6 As shown, in this embodiment, since the first premixed gas injection port and the second premixed gas injection port are respectively disposed on both sides of the gas injection portion 120 , flow guide arms 123 are disposed on both sides of the gas injection portion 120 .

[0093] Optionally, in this embodiment, the guide member 500 further comprises a connection portion, a groove is provided on the connection portion, the groove is connected to the top of the gas injection portion 120, and guide plates 510 are provided on both sides of the connection portion. The guide member 500 has a simple structure and is easy to install and remove.

[0094] Optionally, the flow guide 500 can be formed by bending.

[0095] Optionally, in this embodiment, end plates 140 are detachably provided at both ends of the gas injection portion 120 in the extension direction, and the end plates 140 are used to clamp and fix the guide member 500 .

[0096] Optionally, the end plate 140 and the gas injection portion 120 may be connected by bolts.

[0097] Furthermore, if Figure 1 , Figure 2 , Figure 4 , Figure 5 and Fig.12As shown, the infrared burner also includes an outer insulation block 600 and an inner insulation block 700. There are multiple outer insulation blocks 600, and the multiple outer insulation blocks 600 are detachably connected to the bearing part 110. The outer insulation block 600 is provided with a fixing groove 610. The multiple outer insulation blocks 600 are spliced ​​and arranged so that the multiple fixing grooves 610 surround the combustion component installation space, and the combustion component installation space is used to fix the infrared combustion component 400. The inner insulation block 700 is arranged between the gas injection part 120 and the infrared combustion component 400, and the inner insulation block 700 and the multiple outer insulation blocks 600 clamp and fix the infrared combustion component 400. By setting the outer insulation block 600 and the inner insulation block 700, the heat insulation between the infrared combustion component 400 and the frame 100 is achieved, and the problem of excessive temperature rise of the frame 100 due to the infrared combustion component 400 is reduced, thereby improving the stability of the frame 100. Furthermore, the outer heat insulation block 600 is detachably connected to the bearing portion 110, and the infrared combustion element 400 can be disassembled by disassembling the outer heat insulation block 600, thereby avoiding the need to destructively disassemble other components of the infrared burner when replacing the infrared combustion element 400, thereby reducing the maintenance cost of the infrared burner. In addition, multiple outer heat insulation blocks 600 are spliced ​​and arranged, so that the outer heat insulation blocks 600 can be easily disassembled when the infrared combustion element 400 needs to be replaced, thereby reducing the difficulty of disassembling the infrared combustion element 400.

[0098] Optionally, continue to see Fig. 9 , Fig.10 and Fig.12 In this embodiment, a step structure 430 is provided at the beginning of the infrared combustion element 400, and the inner insulation block 700 is in an inverted L shape. The inverted L-shaped inner insulation block 700 cooperates with the step structure 430 to better fix the infrared combustion element 400.

[0099] Optionally, the top of the inverted L-shaped inner heat insulation block 700 abuts against the guide arm 123 to achieve heat insulation between the guide arm 123 and the infrared combustion element 400.

[0100] Furthermore, if Figure 1 and Fig.12 As shown, a slot 620 is provided on the outer wall of the outer heat insulation block 600, and each outer heat insulation block 600 is provided with a connecting plate 800. The first end of the connecting plate 800 is bent to form a connecting section 810, and the connecting section 810 is connected to the slot 620. The connecting member 900 is passed through the second end of the connecting plate 800 and is connected to the side wall of the bearing part 110. The outer heat insulation block 600 is fixed to the bearing part 110 by connecting the connecting plate 800 with the outer heat insulation block 600, which has a simple structure and is convenient for installation and disassembly.

[0101] Optionally, the connecting member 900 may be a bolt, and a threaded hole is provided on the side wall of the bearing portion 110 , and the bolt is threadedly connected to the threaded hole.

[0102] Continue to see Figure 4 Taking the first combustion-supporting gas flow channel 101 as an example, in this embodiment, the connecting member 900 can be used as a plug of the first horizontal section of the first combustion-supporting gas flow channel 101 to block the opening of the first horizontal section located on the left wall of the bearing portion 110. In this way, the connecting member 900 has the function of connecting the connecting plate 800 and the bearing portion 110, and also has the function of blocking the processed opening of the first horizontal section, thus achieving "one object for two purposes" and simplifying the structure of the infrared burner.

[0103] Further, see Figure 1 The frame 100 further includes a bracket 130, on which an ignition electrode 1000 and a flame detection member 1100 are disposed. The end of the ignition electrode 1000 is spaced from the arc-shaped combustion surface 410 of the infrared combustion member 400 for ignition, and the flame detection member 1100 is used to detect combustion on the arc-shaped combustion surface 410.

[0104] In this embodiment, since two infrared combustion elements 400 are provided, two ignition electrodes 1000 and two flame detection elements 1100 are also provided.

[0105] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. Infrared burner, characterized in that, include: The frame (100) comprises a bearing portion (110) and a gas injection portion (120) arranged on the bearing portion (110), wherein the gas injection portion (120) is provided with a plurality of premixed gas injection ports; the bearing portion (110) and the gas injection portion (120) are provided with combustion-supporting gas flow channels and fuel gas flow channels (103) corresponding to the premixed gas injection ports one by one, and the corresponding combustion-supporting gas flow channels and fuel gas in the fuel gas flow channels (103) are mixed at the premixed gas injection ports and then injected; A combustion-supporting gas supply portion, arranged on the bearing portion (110), and used for conveying low-temperature combustion-supporting gas into the plurality of combustion-supporting gas flow passages; A gas supply unit (300) is arranged on the bearing unit (110) and is used to deliver gas to the plurality of gas flow channels (103); The infrared combustion element (400) is arranged on the supporting part (110) and surrounds the gas injection part (120). The infrared combustion element (400) is provided with an arc-shaped combustion surface (410). The arc-shaped combustion surface (410) is located below the premixed gas injection port. The premixed gas is sprayed from the premixed gas injection port to the starting end of the arc-shaped combustion surface (410) at a preset angle, and is guided by the arc-shaped combustion surface (410) and thrown out from the tail end of the arc-shaped combustion surface (410).

2. The infrared burner according to claim 1, characterized in that: The bearing portion (110) and the gas injection portion (120) are in an inverted "T" shaped structure. The infrared combustion elements (400) are provided on opposite sides of the gas injection portion (120). A portion of the plurality of premixed gas injection ports are first premixed gas injection ports, and another portion are second premixed gas injection ports. The first premixed gas injection ports and the second premixed gas injection ports are respectively located on opposite sides of the gas injection portion (120) and are used to respectively inject the premixed gas onto the corresponding infrared combustion elements (400).

3. The infrared burner according to claim 2, characterized in that: The supporting gas supply part comprises a first supporting gas supply part (210) and a second supporting gas supply part (220) arranged at two ends of the bearing part (110); the first supporting gas supply part (210) and the bearing part (110) enclose a first supporting gas confluence chamber (211); and the second supporting gas supply part (220) and the bearing part (110) enclose a second supporting gas confluence chamber (221); A part of the plurality of combustion-supporting gas flow channels is a first combustion-supporting gas flow channel (101), and another part is a second combustion-supporting gas flow channel (102); the first combustion-supporting gas flow channel (101) is arranged in the bearing portion (110) on one side of the gas injection portion (120) and in the gas injection portion (120); an inlet of the first combustion-supporting gas flow channel (101) is communicated with the first combustion-supporting gas confluence cavity (211), and an outlet of the first combustion-supporting gas is communicated with the first premixed gas injection port; the second combustion-supporting gas flow channel (102) is arranged in the bearing portion (110) on the other side of the gas injection portion (120) and in the gas injection portion (120); an inlet of the second combustion-supporting gas flow channel (102) is communicated with the second combustion-supporting gas confluence cavity (221), and an outlet of the second combustion-supporting gas flow channel (102) is communicated with the second premixed gas injection port; The gas supply part (300) is arranged on the bearing part (110), and is arranged on two opposite sides of the bearing part (110) together with the gas injection part (120); the gas supply part (300) and the bearing part (110) form a gas confluence cavity (310); The gas flow passage (103) is arranged in the bearing portion (110) and the gas injection portion (120); the inlets of all the gas flow passages (103) are connected to the gas confluence cavity (310); the outlets of a portion of the gas flow passages (103) are connected to the first premixed gas injection port; and the outlets of another portion of the gas flow passages (103) are connected to the second premixed gas injection port.

4. The infrared burner according to claim 3, characterized in that: The first combustion-supporting gas flow channel (101) comprises a first outlet section (1011) connected to the first premixed gas injection port, and the second combustion-supporting gas flow channel (102) comprises a second outlet section (1021) connected to the second premixed gas injection port; the fuel gas flow channel (103) comprises a fuel gas outlet section (1031), a portion of the fuel gas outlet section (1031) is connected to the first outlet section (1011) and is arranged at an angle, and another portion of the fuel gas outlet section (1031) is connected to the second outlet section (1021) and is arranged at an angle.

5. The infrared burner according to claim 3, characterized in that: A plurality of the first combustion-supporting gas flow channels (101) and a plurality of the second combustion-supporting gas flow channels (102) are arranged in parallel and at intervals along the length direction of the frame (100), and the first combustion-supporting gas flow channels (101) and the second combustion-supporting gas flow channels (102) are arranged alternately.

6. The infrared burner according to claim 1, characterized in that: The bearing portion (110) and the gas injection portion (120) are an integrated structure.

7. The infrared burner according to any one of claims 1 to 6, characterized in that: The infrared combustion element (400) is a porous structure, and the porosity of the infrared combustion element (400) is less than or equal to 80%.

8. The infrared burner according to any one of claims 1 to 6, characterized in that: The arc-shaped combustion surface (410) comprises a first plane (411), a second plane (412), and an arc surface (413) smoothly connected to the first plane (411) and the second plane (412), and the angle between the first plane (411) and the second plane (412) is 60°-120°.

9. The infrared burner according to any one of claims 1 to 6, characterized in that: The arc-shaped combustion surface (410) is provided with a plurality of arc-shaped grooves (420) arranged at intervals, and the arc-shaped grooves (420) extend along the bending direction of the arc-shaped combustion surface (410).

10. The infrared burner according to claim 9, characterized in that: The width of the arc-shaped groove (420) is 3 mm-15 mm.

11. The infrared burner according to claim 9, characterized in that: The infrared combustion element (400) has a thickness of 5 mm to 20 mm at the position where the arc groove (420) is provided.

12. The infrared burner according to any one of claims 1 to 6, characterized in that: A guide arm (123) is provided on the gas injection portion (120) below the premixed gas injection port. A guide member (500) is also provided on the gas injection portion (120). The guide member (500) includes a guide plate (510) located above the premixed gas injection port. The guide plate (510) and the guide arm (123) are used to guide the premixed gas to be sprayed toward the arc-shaped combustion surface (410) at the preset angle.

13. The infrared burner according to any one of claims 1 to 6, characterized in that: The infrared burner also includes: A plurality of external heat insulation blocks (600) are provided, and the plurality of external heat insulation blocks (600) are detachably connected to the bearing portion (110). A fixing groove (610) is provided on the external heat insulation block (600). The plurality of external heat insulation blocks (600) are spliced ​​and arranged so that the plurality of fixing grooves (610) surround a combustion element installation space, and the combustion element installation space is used to fix the infrared combustion element (400); The inner heat insulation block (700) is arranged between the gas injection part (120) and the infrared combustion component (400), and the inner heat insulation block (700) and the plurality of outer heat insulation blocks (600) clamp and fix the infrared combustion component (400).

14. The infrared burner according to claim 13, characterized in that A slot (620) is provided on the outer wall of the outer heat insulation block (600), and each outer heat insulation block (600) is provided with a corresponding connecting plate (800). The first end of the connecting plate (800) is bent to form a connecting section (810), and the connecting section (810) is connected to the slot (620). The connecting member (900) is passed through the second end of the connecting plate (800) and is connected to the side wall of the bearing portion (110).

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