Regenerative flameless infrared radiation combustion stove

Abstract

The utility model provides a kind of flameless infrared radiation combustion stove, and the combustion stove includes furnace body, grate tray and heat accumulator, furnace body is equipped with annular furnace cavity, built-in spiral flow guide passage, bottom is equipped with tangential air inlet, so that combustible gas rotates flow along spiral trajectory, realizes pressure balance by centrifugal force;Grate tray is located in the upper portion of furnace cavity, is equipped with grate hole, inserts straight cylinder shape gas outlet pipe, gas outlet pipe is placed combustion nozzle;Heat accumulator is placed above grate tray, is equipped with heat storage hole corresponding with grate hole, gas outlet pipe and combustion nozzle are inserted therein, and heat accumulator absorbs combustion heat energy and converts into infrared and radiates.The stove realizes pressure balance by the rotating flow of combustible gas in spiral flow guide passage, forms flameless combustion on the upper portion of combustion nozzle after entering gas outlet pipe through grate hole.The heat accumulator converts combustion heat energy into infrared radiation, and simultaneously combines heat conduction and heat convection, efficiently transfers heat energy to the object to be heated.

Description

Technical Field

[0001] This utility model belongs to the field of combustion heating technology, and in particular relates to a regenerative flameless infrared radiation combustion stove. Background Technology

[0002] When clean fuels such as natural gas and liquefied petroleum gas are fully premixed and burned in combustion equipment, fuel molecules and oxidants form a molecular-level mixture at the flame front. This concentrated energy release generates a high-temperature zone, and heat transfer is achieved through thermal conduction and convection, ultimately providing heat to the device requiring heating. Currently, combustion heating technology is widely used in various fields such as household and commercial catering stoves, industrial boilers, food processing (e.g., sauce preparation systems, preheating of frozen foods), and metallurgical manufacturing (steel refining, non-ferrous metal smelting).

[0003] However, existing combustion equipment still faces the following technical bottlenecks in practice:

[0004] First, the gas flow within the furnace cavity of existing combustion equipment exhibits a non-uniform gradient distribution with high pressure at the center and low pressure at the edges, requiring secondary pressure equalization through the addition of a perforated distribution plate. This design directly leads to increased equipment complexity, larger size, and significantly higher production costs.

[0005] Secondly, when the equipment is used in enclosed or confined spaces, the formation of a stable blue flame after the fuel and oxygen are fully mixed faces the risk of flame instability. This is because the confined space will compress the flame shape, which can easily lead to incomplete combustion, energy waste, or even an explosion. On the other hand, the heat transfer efficiency of heat conduction and heat convection is reduced in enclosed or confined spaces due to the obstruction of natural convection.

[0006] Furthermore, although the nitrogen oxide (NOx) emission concentrations of existing combustion equipment meet current standards, they cannot meet the requirements for ultra-low nitrogen emissions, which limits their application in high-end environmental protection scenarios.

[0007] In summary, existing combustion equipment still faces significant technical bottlenecks in areas such as furnace flow field uniformity, adaptability to enclosed spaces, and ultra-low nitrogen emission control. These issues not only limit further improvements in equipment performance but also restrict its widespread application in high-end environmental protection scenarios and under special spatial conditions. Therefore, it is crucial for those skilled in the art to overcome existing technological limitations and develop a new generation of efficient, clean, and safe combustion equipment, which has become a key path for promoting technological upgrades in the industry. Utility Model Content

[0008] In view of the shortcomings of the prior art, this utility model provides a regenerative flameless infrared radiation combustion stove to solve the problems in the background art.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] This utility model provides a regenerative flameless infrared radiation combustion stove, which generates heat energy and transfers it to the object to be heated. The combustion stove includes:

[0011] The furnace body includes an annular furnace cavity, the furnace cavity having a built-in spiral guide channel, and a tangential air inlet at the bottom of the guide channel;

[0012] A grate plate, located at the upper part of the furnace cavity, has several grate holes. A straight cylindrical gas outlet pipe is inserted into the grate holes, and a burner is inserted into the gas outlet pipe.

[0013] A heat storage body is placed above the grate plate. The heat storage body has heat storage holes corresponding to the grate holes. The gas outlet pipe and the burner are inserted into the corresponding heat storage holes.

[0014] The combustible gas enters the guide channel through the air inlet and flows axially along the spiral trajectory of the guide channel. During the flow, the combustible gas is driven by centrifugal force to migrate radially, so that the pressure of the combustible gas in the furnace cavity is balanced.

[0015] The combustible gas enters the gas outlet pipe through the grate and forms flameless combustion at the upper part of the burner.

[0016] The heat storage body absorbs combustion heat energy and converts it into infrared rays, which then radiate infrared rays.

[0017] The heat generated by the combustion stove is efficiently transferred to the object to be heated through three heat transfer methods: heat conduction, heat convection, and heat radiation.

[0018] In one possible implementation, the combustion stove further includes an air distribution assembly, which includes a global mixing valve group and a fan. The global mixing valve group is connected to the air inlet of the fan, and the air outlet of the fan is connected to the air inlet of the furnace body via a pipe. The combustible gas formed by the global mixing valve group is continuously transported to the furnace body by the fan.

[0019] In one possible implementation, the combustible gas is a mixture of fuel gas and combustion-supporting air.

[0020] In one possible implementation, the furnace body further includes a support platform located at the upper inner edge of the furnace cavity, and the support platform has an annular stepped structure, with the grate plate embedded on the support platform.

[0021] In one possible implementation, the furnace body further includes an upwardly protruding furnace platform located in the center of the furnace cavity, the flow channel surrounding the furnace platform, and an ignition needle installed on the top of the furnace platform.

[0022] In one possible implementation, the grate is further provided with clearance holes for avoiding the furnace platform. The clearance holes are fitted onto the furnace platform, and the grate holes are arranged radially in a circular pattern with the clearance holes as the center. The grate holes are provided with internal threads.

[0023] In one possible implementation, the lower part of the vent pipe is provided with an external thread, and the external thread of the vent pipe is screwed into the internal thread of the grate hole, so that the vent pipe is screwed to the grate plate.

[0024] In one possible implementation, the burner is made of ceramic material and has a rotating structure. The lower part of the burner is located inside the exhaust pipe, and the upper part is exposed above the exhaust pipe.

[0025] In one possible implementation, the heat storage body is a porous honeycomb columnar structure, and the heat storage body is made of refractory material.

[0026] In one possible implementation, the heat storage body converts the absorbed heat energy into infrared rays and transfers them to the object to be heated via thermal radiation. Beneficial effects

[0027] This invention provides a regenerative flameless infrared radiation combustion stove, comprising a furnace body, a grate, and a heat storage body. The furnace body has an annular furnace cavity with a built-in spiral guide channel and a tangential air inlet at the bottom, allowing the combustible gas to rotate and flow along a spiral trajectory. Pressure equalization is achieved through centrifugal force, thus eliminating the need for a distribution plate, simplifying the furnace structure, reducing the furnace volume, and lowering production costs. The grate is located at the upper part of the furnace cavity and has grate holes with a straight cylindrical air outlet pipe inserted inside, containing a burner nozzle. The heat storage body is placed above the grate and has heat storage holes corresponding to the grate holes, with the air outlet pipe and burner nozzle inserted within. This allows the combustible gas to form flameless combustion above the burner nozzle, eliminating the flame instability risks and explosion hazards that may arise from traditional blue flame combustion. Especially in enclosed or confined spaces, flameless combustion is safer and more efficient. Meanwhile, the heat storage body absorbs combustion heat energy and converts it into infrared radiation. Combined with the existing heat conduction and heat convection in the furnace cavity, a three-dimensional synergistic heat transfer system of "radiation-convection-conduction" is constructed. This not only improves thermal efficiency, but also reduces NOx generation under high temperature and oxygen-rich conditions due to flameless combustion, thus achieving ultra-low nitrogen emissions.

[0028] This invention provides a regenerative flameless infrared radiation combustion stove. The stove's air distribution assembly includes a global mixing valve group and a fan. The outlet of the global mixing valve group is sealed to the air inlet of the fan, and the fan outlet forms a loop air supply system with the furnace body's air inlet through a pipeline. The combustible gas, dynamically matched by the global mixing valve group, is mixed with combustion air and injected into the spiral guide channel of the furnace cavity under constant pressure by the fan. This provides a stable, uniform, and adjustable fuel supply for flameless combustion in a confined space, while also significantly improving combustion thermal efficiency. Attached Figure Description

[0029] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0030] Figure 1 This is an exploded view of the combustion stove structure in Example 1;

[0031] Figure 2 This is a schematic diagram of the combustion stove in Example 1;

[0032] Figure 3 The structural explosion of the furnace body in Example 1 Figure 1 ;

[0033] Figure 4 The structural explosion of the furnace body in Example 1 Figure 2 ;

[0034] 1-Furnace body; 11-Furnace cavity; 12-Guide channel; 13-Air inlet; 14-Support platform; 15-Furnace platform; 2-Grate plate; 21-Grate hole; 22-Allowing hole; 3-Air outlet pipe; 4-Burnhead; 5-Heat regenerator; 51-Heat regenerator hole. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. In addition, for the sake of convenience, the terms "upper," "lower," "left," and "right" are equivalent to the upper, lower, left, and right directions of the accompanying drawings themselves, and the terms "first," "second," etc., are used for descriptive purposes and have no other special meaning.

[0036] To address the shortcomings of existing combustion equipment, this utility model provides a regenerative flameless infrared radiation combustion stove. The stove generates heat energy and transfers it to the object being heated. The stove includes a furnace body, a grate, a heat storage medium, and an air distribution assembly, as detailed below:

[0037] 1-Furnace body

[0038] The furnace body includes a ring-shaped furnace cavity, and the combustion furnace cavity has a spiral guide channel inside, with a tangential air inlet at the bottom of the combustion furnace guide channel.

[0039] In specific application scenarios, this furnace body, through the coordinated operation of annular furnace chamber, spiral guide channel, and tangential air inlet, constructs an integrated flow field optimization system for forced swirling and pressure equalization, fundamentally solving the technical defect of uneven pressure distribution in traditional combustion equipment. When combustible gas enters the annular chamber through the air inlet, it forms a continuous rotating flow under the constraint of the spiral guide channel. Due to the centrifugal effect generated by the spiral motion of the fluid, the combustible gas undergoes radial migration during its axial ascent, thus forming a dynamic pressure compensation mechanism within the guide channel. This dynamic pressure compensation mechanism ensures a uniform circumferential distribution of the pressure field, ultimately achieving the same pressure value at all points across the chamber cross-section. Subsequently, the combustible gas enters the outlet pipe through the grate and forms flameless combustion above the burner nozzle. This replaces the traditional blue flame combustion method, improving combustion safety and efficiency.

[0040] It should be noted that the spiral flow channel of the furnace body is a composite flow channel similar to a Venturi-annular diffuser. When the combustible gas moves in a spiral motion, the pressure of the combustible gas at the outer edge increases due to the centrifugal effect, while the central region generates negative pressure due to the velocity circulation. This pressure gradient drives the fluid to generate a radial secondary flow similar to the De'an effect, thereby forming a self-regulating pressure equalization mechanism.

[0041] Furthermore, the furnace body of the combustion stove is integrally cast from cast iron. Cast iron furnace bodies possess advantages such as high temperature resistance, thermal shock resistance, corrosion resistance, oxidation resistance, and strong heat storage capacity. In addition, the furnace body can be manufactured not only by casting from cast iron but also using other manufacturing processes. While ensuring that the furnace body's working performance is not affected, those skilled in the art can select the manufacturing process and materials for the furnace body according to actual needs. Changes in the furnace body's manufacturing process and materials do not affect the scope of protection of this application.

[0042] Furthermore, the stove body is equipped with stove legs and a stove handle. The stove legs serve as a support structure, with at least three legs evenly distributed at the lower end of the stove body. The addition of stove legs significantly improves the stability of the stove body. The three support points can form a stable plane, ensuring that the stove body is not easily tipped over during placement and use. Especially during heating, stable support can prevent the stove body from moving unexpectedly due to uneven heating or external forces.

[0043] The stove has several handles, evenly distributed along the outer edge of the upper part of the stove body. These handles provide convenient grips, allowing users to apply force more easily when moving or adjusting the stove's position without directly contacting the hot parts of the stove, thus reducing operational difficulty and the risk of burns.

[0044] As can be seen from the above, the furnace legs and handle make the furnace body more ergonomic, allowing users to experience a more comfortable and convenient operating experience, thus improving user satisfaction.

[0045] In some examples, the stove body also includes a support platform located at the upper inner edge of the stove cavity, and the support platform has an annular stepped structure, with the stove grate embedded on the support platform.

[0046] In specific application scenarios, the support platform adopts a ring-shaped stepped structure. Its stepped surface mechanically engages with the edge of the grate and is installed using an embedded method. This surface contact support structure can evenly distribute the load and avoid localized stress concentration. This not only improves assembly efficiency but also enhances the sealing of the furnace cavity, effectively preventing the leakage of combustible gases.

[0047] In some examples, the stove body also includes an upwardly protruding stove platform located in the center of the stove cavity, with a flow channel surrounding the stove platform and an ignition needle installed on the top of the stove platform.

[0048] In specific application scenarios, the furnace platform, as a central protruding structure of the furnace cavity, works synergistically with the spiral guide channel. After the combustible gas enters the guide channel through the inlet, it rotates and flows along a spiral trajectory under the action of centrifugal force. The presence of the furnace platform enhances the radial migration of the gas, significantly reducing the pressure difference between the central high-pressure zone and the edge low-pressure zone, thereby eliminating the structural redundancy of traditional combustion equipment that requires the addition of a distribution plate due to uneven pressure gradients.

[0049] The ignition needle is installed on the top of the furnace platform, in the core area of ​​the airflow. This ensures that the ignition energy acts directly on the combustible gas, improving the ignition success rate. At the same time, the furnace platform structure provides physical protection for the ignition needle, reducing the risk of accidental flameout.

[0050] 2-Grate

[0051] The grate is located at the top of the furnace chamber of the combustion stove. It has several grate holes, and a straight cylindrical gas outlet pipe is inserted into the grate holes. A burner nozzle is inserted into the gas outlet pipe.

[0052] The grate of the stove is also provided with clearance holes, which are used to avoid the stove platform. The clearance holes are fitted onto the stove platform. The grate holes are arranged in a radial circular pattern with the clearance holes as the center. The grate holes are provided with internal threads.

[0053] In specific applications, the grate is embedded in the upper part of the furnace cavity, with its grate holes arranged in a radial circumferential array. This ensures that the combustible gas, after flowing out from the spiral guide channel, can be evenly distributed to each straight cylindrical gas outlet pipe. This effectively avoids the local accumulation of combustible gas in the furnace cavity, achieves uniform airflow distribution, and provides stable airflow conditions for flameless combustion of the burner.

[0054] Meanwhile, the grate not only supports the gas outlet pipe and burner, but also passes through the clearance holes on it to securely connect the grate to the stove platform. This not only enhances the overall stability of the stove, but also ensures the continuity and reliability of the combustion process.

[0055] In addition, the straight-shaped gas outlet pipe allows the combustible gas to form a stable airflow column when it flows out, and the burner is inserted into the gas outlet pipe, which further improves the combustion efficiency.

[0056] Furthermore, the grate of the combustion stove is integrally cast from cast iron. Cast iron grate trays possess advantages such as high temperature resistance, thermal shock resistance, corrosion resistance, oxidation resistance, and strong heat storage capacity. In addition, the grate tray can be manufactured not only by casting from cast iron but also using other manufacturing processes. While ensuring that the grate tray's working performance is not affected, those skilled in the art can select the manufacturing process and materials of the grate tray according to actual needs. Changes in the grate tray's manufacturing process and materials do not affect the scope of protection of this application.

[0057] Furthermore, the central axis of the stove clearance hole coincides with the central axis of the stove platform, and the diameter of the stove clearance hole is larger than the diameter of the stove grate.

[0058] In specific application scenarios, the alignment of the clearance hole with the central axis of the furnace platform ensures the symmetry of gas flow within the furnace cavity, enabling the combustible gas to rotate uniformly around the furnace platform axis under the drive of the spiral guide channel, forming a stable annular airflow field.

[0059] In some examples, the lower part of the gas outlet pipe of the combustion appliance has an external thread, which is screwed into the internal thread of the grate hole of the combustion appliance, so that the gas outlet pipe of the combustion appliance is screwed into the grate of the combustion appliance.

[0060] In specific application scenarios, the gas outlet pipe of the combustion stove is made of stainless steel, and the gas outlet pipe is screwed to the grate hole through external thread, which further enhances the airtightness of the combustion stove.

[0061] Furthermore, the central axis of the gas outlet pipe of the combustion stove coincides with the central axis of the corresponding grate hole of the combustion stove, so that the flow path of combustible gas from the grate hole into the gas outlet pipe is a straight trajectory, reducing airflow deflection or turbulence and reducing pressure loss.

[0062] In some examples, the burner nozzle of the stove is made of ceramic material and has a rotating structure. The lower part of the burner nozzle is located inside the stove's gas outlet pipe, while the upper part is exposed above the gas outlet pipe.

[0063] In specific applications, the burner nozzle is made of ceramic material, utilizing the ceramic material's high temperature resistance, low thermal conductivity, and thermal shock resistance. This allows the burner nozzle to withstand the high-temperature environment generated by flameless combustion, while reducing heat conduction to the exhaust pipe and minimizing heat loss.

[0064] Meanwhile, the burner nozzle has a rotating structure, which helps to ensure the uniform distribution and combustion of combustible gases. In addition, the lower part of the burner nozzle is located inside the gas outlet pipe, allowing the combustible gases to be fully mixed and preheated before combustion. Its upper part is exposed above the gas outlet pipe, providing conditions for stable flame combustion and effective heat transfer. This allows the combustion process to proceed smoothly on the surface of the burner nozzle, avoiding flame formation and thus reducing the generation of nitrogen oxides.

[0065] Furthermore, the upper part of the burner nozzle is located inside the corresponding heat storage hole of the burner, and the upper surface of the burner nozzle is lower than the upper surface of the heat storage body, so that the flame can better heat the heat storage body.

[0066] Furthermore, the central axis of the burner nozzle of the combustion stove coincides with the central axis of its corresponding gas outlet pipe, ensuring that the flow path of combustible gas from the gas outlet pipe to the burner nozzle is straight. This reduces turbulence and pressure loss during gas transmission, allowing combustible gas to enter the burner nozzle more smoothly and providing a basic condition for stable combustion.

[0067] 3-Heat storage body

[0068] The heat storage body is placed above the grate of the combustion stove. The heat storage body has a porous honeycomb columnar structure and is made of refractory material. The heat storage body has heat storage holes corresponding to the grate holes of the combustion stove. The gas outlet pipe and the burner nozzle of the combustion stove are inserted into the corresponding heat storage holes. The heat storage body converts the absorbed heat energy into infrared rays and transfers them to the object to be heated by heat radiation.

[0069] In specific applications, the heat storage body employs a porous honeycomb columnar structure, which significantly increases the surface area and improves heat absorption efficiency. The correspondence between the heat storage pores and the grate ensures that the high-temperature flue gas generated during combustion flows evenly through the heat storage body, achieving efficient heat capture. Furthermore, during flameless combustion, the heat storage body not only absorbs the heat energy generated by combustion but also converts it into infrared radiation, directly transferring it to the object being heated. This process replaces the direct radiative heating method of traditional blue flame combustion, reducing heat loss through the sensible heat of the flue gas and improving the overall thermal efficiency of the system.

[0070] The heat storage body is made of refractory material and possesses high emissivity and excellent thermal shock stability. After absorbing combustion heat energy, the heat storage body converts the heat energy into infrared radiation through lattice vibration, which is then directly transferred to the object to be heated in the form of radiation, reducing heat loss in intermediate heat transfer stages. Furthermore, the heat storage body can be made not only of refractory materials but also of other materials. Those skilled in the art can select the material of the heat storage body according to actual needs, provided that the working performance of the heat storage body is not affected. Changes in the material of the heat storage body do not affect the scope of protection of this application.

[0071] 4-Air distribution components

[0072] The combustion stove air distribution assembly includes a global mixing valve group and a fan. The global mixing valve group is connected to the air inlet of the combustion stove fan, and the air outlet of the combustion stove fan is connected to the air inlet of the combustion stove body through a pipe. The combustible gas formed by the global mixing valve group is continuously transported to the combustion stove body by the combustion stove fan.

[0073] In specific application scenarios, the global mixing valve group adopts a multi-channel proportional regulating valve structure to achieve dynamic mixing of fuel gas and combustion air. Through pressure-temperature dual-modal feedback control, the fuel gas / air ratio is corrected in real time, resulting in low fluctuation of mixed gas composition and providing stoichiometric conditions for flameless combustion.

[0074] The blower is a variable frequency blower, which is integrated with the whole-area mixing valve group to form a constant pressure gas supply system. The blower adopts stepless speed regulation technology, with stable output pressure and a large flow adjustment range, which can adapt to different load requirements and ensure that the mixed combustible gas is continuously delivered to the furnace cavity at a stable pressure.

[0075] In some examples, the combustible gas in the combustion stove is a mixture of gas and combustion air. The mixing of gas and combustion air is a necessary condition for the combustion reaction. By controlling the mixing ratio and the uniformity of the two, the stability and efficiency of the combustion process can be ensured.

[0076] The working principle of this combustion stove:

[0077] Combustible gas enters the combustion furnace's guide channel through the gas inlet and flows axially along the spiral trajectory of the guide channel. During the flow, the combustible gas is driven by centrifugal force to migrate radially, thus equalizing the pressure of the combustible gas within the combustion furnace cavity. The combustible gas enters the combustion furnace's gas outlet pipe through the grate and forms flameless combustion above the burner nozzle. The combustion furnace's heat storage body absorbs the combustion heat energy and converts it into infrared radiation. The heat energy generated by the combustion furnace is efficiently transferred to the object to be heated through three heat transfer methods: heat conduction, heat convection, and heat radiation. Example 1

[0078] Based on the above concept, such as Figure 1-4 As shown in the figure, this embodiment provides a specific application of a combustion stove, such as... Figure 1 As shown, this combustion stove generates heat energy and transfers it to the object being heated. The combustion stove includes:

[0079] like Figure 3 , Figure 4 As shown, the furnace body 1 includes an annular furnace cavity 11, and the combustion furnace cavity 11 is equipped with a spiral guide channel 12. The bottom of the combustion furnace guide channel 12 is provided with a tangential air inlet 13.

[0080] like Figure 1 As shown, the grate 2 is located on the upper part of the furnace chamber 11 of the combustion stove, and several grate holes 21 are opened on it. A straight cylindrical gas outlet pipe 3 is inserted into the grate hole 21 of the combustion stove, and a burner 4 is inserted into the gas outlet pipe 3 of the combustion stove.

[0081] like Figure 1 As shown, the heat storage body 5 is placed above the grate of the combustion stove 2. The heat storage body 5 has heat storage holes 51 corresponding to the grate holes 21 of the combustion stove. The gas outlet pipe 3 and the burner nozzle 4 of the combustion stove are inserted into the corresponding heat storage holes 51 of the combustion stove.

[0082] The combustible gas enters the combustion furnace guide channel 12 through the combustion furnace inlet 13 and continues to rotate and flow axially along the spiral trajectory of the combustion furnace guide channel 12. The combustible gas is driven by centrifugal force to migrate radially during the flow, so that the pressure of the combustible gas in the combustion furnace cavity 11 is balanced.

[0083] Combustible gas from the combustion stove enters the gas outlet pipe 3 of the combustion stove through the grate 21 and forms flameless combustion at the upper part of the combustion nozzle 4.

[0084] The heat storage body 5 of the combustion stove absorbs the heat energy of combustion and converts it into infrared rays, which are then emitted as infrared radiation.

[0085] The heat energy generated by the combustion stove is efficiently transferred to the object to be heated by the combustion stove through three heat transfer methods: heat conduction, heat convection and heat radiation.

[0086] In an example, such as Figure 3 As shown, the combustion stove body 1 also includes a support platform 14. The combustion stove support platform 14 is located at the upper inner edge of the combustion stove cavity 11 and has an annular stepped structure. The combustion stove grate 2 is embedded in the combustion stove support platform 14.

[0087] In an example, such as Figure 3 As shown, the furnace body 1 of the combustion stove also includes an upwardly protruding stove platform 15. The stove platform 15 is located in the middle of the combustion stove cavity 11. The combustion stove guide channel 12 surrounds the stove platform 15. An ignition needle is installed on the top of the stove platform 15.

[0088] In an example, such as Figure 1 As shown, the combustion stove grate 2 is also provided with a clearance hole 22. The combustion stove clearance hole 22 is used to avoid the combustion stove platform 15. The combustion stove clearance hole 22 is fitted onto the combustion stove platform 15. The combustion stove grate holes 21 are arranged radially in a circular pattern with the combustion stove clearance hole 22 as the center. The combustion stove grate holes 21 are provided with internal threads.

[0089] In the example, the lower part of the gas outlet pipe 3 of the combustion appliance is provided with an external thread, and the external thread of the gas outlet pipe 3 of the combustion appliance is screwed into the internal thread of the grate hole 21 of the combustion appliance, so that the gas outlet pipe 3 of the combustion appliance is screwed into the grate plate 2 of the combustion appliance.

[0090] In this example, the burner nozzle 4 of the combustion appliance is made of ceramic material and has a rotating structure. The lower part of the burner nozzle 4 is located inside the gas outlet pipe 3 of the combustion appliance, and the upper part is exposed above the gas outlet pipe 3 of the combustion appliance.

[0091] In the example, the combustion furnace heat storage body 5 has a porous honeycomb columnar structure and is made of refractory material.

[0092] In this example, the heat storage body 5 of the combustion stove converts the absorbed heat energy into infrared rays, which are then transferred to the object to be heated via thermal radiation. Example 2

[0093] Based on Example 1, the combustion stove also includes an air distribution assembly (not shown in the figure). The air distribution assembly includes a global mixing valve group and a fan. The global mixing valve group is connected to the air inlet of the combustion stove fan. The air outlet of the combustion stove fan is connected to the air inlet 13 of the combustion stove body 1 via a pipe. The combustible gas formed by the global mixing valve group is continuously transported to the combustion stove body 1 by the combustion stove fan.

[0094] In this example, the combustible gas in the stove is a mixture of fuel gas and combustion-supporting air.

[0095] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A regenerative flameless infrared radiation combustion stove, wherein the combustion stove generates heat energy and transfers the heat energy to the object to be heated, characterized in that, The combustion furnace includes: The furnace body (1) includes an annular furnace cavity (11), the furnace cavity (11) has a spiral guide channel (12) inside, and the bottom of the guide channel (12) is provided with a tangential air inlet (13). A grate plate (2) is located at the upper part of the furnace cavity (11), and several grate holes (21) are provided on it. A straight cylindrical gas outlet pipe (3) is inserted into the grate hole (21), and a burner (4) is inserted into the gas outlet pipe (3). A heat storage body (5) is placed above the grate (2). The heat storage body (5) has heat storage holes (51) corresponding to the grate holes (21). The gas outlet pipe (3) and the burner (4) are inserted into the corresponding heat storage holes (51). The combustible gas enters the guide channel (12) through the air inlet (13) and continues to rotate and flow axially along the spiral trajectory of the guide channel (12). The combustible gas is driven by centrifugal force to migrate radially during the flow, so that the pressure of the combustible gas in the furnace cavity (11) is balanced. The combustible gas enters the gas outlet pipe (3) through the grate (21) and forms flameless combustion at the upper part of the burner (4); The heat storage body (5) absorbs combustion heat energy and converts it into infrared rays, which then radiate infrared rays. The heat generated by the combustion stove is efficiently transferred to the object to be heated through three heat transfer methods: heat conduction, heat convection, and heat radiation.

2. The combustion stove according to claim 1, characterized in that, The combustion stove also includes an air distribution assembly, which includes a global mixing valve group and a fan. The global mixing valve group is connected to the air inlet of the fan, and the air outlet of the fan is connected to the air inlet (13) of the furnace body (1) via a pipe. The combustible gas formed by the global mixing valve group is continuously transported to the furnace body (1) by the fan.

3. The combustion stove according to claim 2, characterized in that, The combustible gas is a mixture of fuel gas and combustion-supporting air.

4. The combustion stove according to claim 1, characterized in that, The furnace body (1) also includes a support platform (14), which is located at the upper inner edge of the furnace cavity (11) and has an annular stepped structure. The grate (2) is embedded in the support platform (14).

5. The combustion stove according to claim 1, characterized in that, The furnace body (1) also includes an upwardly protruding furnace platform (15), which is located in the middle of the furnace cavity (11). The flow channel (12) surrounds the furnace platform (15), and an ignition needle is installed on the top of the furnace platform (15).

6. The combustion stove according to claim 5, characterized in that, The grate (2) is also provided with a clearance hole (22), which is used to avoid the furnace platform (15). The clearance hole (22) is fitted onto the furnace platform (15). The grate holes (21) are arranged radially around the clearance hole (22). The grate holes (21) are provided with internal threads.

7. The combustion stove according to claim 6, characterized in that, The lower part of the vent pipe (3) is provided with an external thread, and the external thread of the vent pipe (3) is screwed into the internal thread of the grate hole (21), so that the vent pipe (3) is screwed into the grate plate (2).

8. The combustion stove according to claim 1, characterized in that, The burner (4) is made of ceramic material and has a rotating structure. The lower part of the burner (4) is located inside the gas outlet pipe (3), and the upper part is exposed above the gas outlet pipe (3).

9. The combustion stove according to claim 1, characterized in that, The heat storage body (5) has a porous honeycomb columnar structure and is made of refractory material.

10. The combustion stove according to claim 9, characterized in that, The heat storage body (5) converts the absorbed heat energy into infrared rays and transfers them to the object to be heated through thermal radiation.

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