Tea leaf fixation method
By combining a hot air furnace with an air replenishment ring and air circulation, the problem of uneven heating during tea processing is solved, achieving uniform heating of the tea and effective utilization of heat, thereby improving tea quality and production efficiency.
Patent Information
- Application Number
- CN202511066881.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-31
- Publication Date
- 2025-11-04
AI Technical Summary
In existing tea processing equipment, the tea leaves are heated unevenly at the beginning and end, resulting in inconsistent tea quality and significant heat loss.
A hot air furnace is used for fixing the tea leaves. Combined with multiple air replenishing rings, air circulation, and temperature sensors, the rotation of the inner cylinder and the control of the air replenishing valve achieve uniform heating of the tea leaves. The heat storage body is used to recover residual heat and reduce heat loss.
This process ensures uniform heating of the tea leaves, improves the efficiency of fixing the leaves, reduces heat loss, and enhances the consistency of tea quality and production efficiency.
Smart Images
Figure CN120884019A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of tea processing, in particular to a tea fixation method. BACKGROUND
[0002] High-temperature hot air furnace is used in the fixation process of tea making, which can continuously provide high-temperature hot air to dehydrate and dry the tea; however, in the prior art, the high-temperature hot air provided by the high-temperature hot air furnace is about 300 DEG C, which is not because the high-temperature hot air furnace can only provide high-temperature hot air of 300 DEG C, but because the fixation machine used for tea fixation is mainly two kinds of roller type and straight-through type; the tea on the inner wall of the roller of the roller type fixation machine is heated and adhered to the inner wall, and the tea will be overheated and have a burnt taste, and the heat is easily lost; and in the straight-through type fixation machine, the airflow passes through the middle, but the airflow temperature decays, thereby causing uneven heating of the tea in the front and rear sections. Therefore, a tea fixation method capable of ensuring more uniform heating of the tea in the front and rear sections is needed. SUMMARY
[0003] The technical problem to be solved by the present application is to provide a tea fixation method capable of ensuring more uniform heating of the tea in the front and rear sections.
[0004] To solve the above technical problems, the technical scheme adopted by the present application is as follows:
[0005] A tea fixation method using a hot air furnace for fixation, wherein the hot air furnace comprises a heating furnace, a circulation assembly and a fixation assembly;
[0006] A heat conduction channel is arranged in the heating furnace; an air inlet valve is arranged at the inlet of the heat conduction channel;
[0007] The fixation assembly comprises an outer shell, an inner cylinder, a collecting device, a motor, a sensing column, a plurality of air supplementing rings, the inner cylinder is rotationally arranged in the outer shell, the motor drives the inner cylinder to rotate in the outer shell, the inner cylinder comprises a feeding end and a discharging end, and the inner diameter of the inner cylinder gradually decreases from the feeding end to the discharging end; the feeding end of the inner cylinder is provided with a feeding port, and the discharging end is provided with a discharging port; a plurality of air supplementing rings are coaxially arranged on the side wall of the inner cylinder, the air supplementing ring comprises a plurality of air supplementing ports, and a rotating sealing sleeve is arranged on the outer periphery of the air supplementing ring; an air supplementing valve is arranged on the air supplementing ring; a plurality of temperature sensors are arranged on the sensing column, and the sensing column is coaxially arranged with the inner cylinder;
[0008] The collecting device comprises a collecting port and an air outlet, and the collecting port is in communication with the discharging port;
[0009] The circulation assembly comprises an air inlet, a circulation fan and a blower; the air inlet valve is in communication with the blower, and the air supplementing valve is in communication with the air inlet through an air supplementing pipe;
[0010] The air outlet, the circulating fan, the heat conduction channel, the air inlet and the feeding port are sequentially communicated to form a gas circulation.
[0011] Preferably, the air supplementing port is obliquely arranged towards the discharging port.
[0012] Preferably, the sensing column comprises a connecting portion and a sensing portion, the connecting portion is connected in the collecting port, one end of the sensing portion is connected with the connecting portion, and the other end is arranged towards the feeding port, and the sensing portion is coaxially arranged with the inner cylinder.
[0013] One of the temperature sensors is arranged on the end of the sensing portion towards the feeding port.
[0014] Preferably, when the fixation is completed, the heating furnace and the air supplementing valve stop working, and the circulating fan and the air supplementing valve are all opened to blow the tea leaves in the inner cylinder into the collecting device to stop working.
[0015] Preferably, the circulating assembly further comprises a heat accumulator, and the heat accumulator is arranged between the air outlet and the circulating fan.
[0016] Preferably, a dust collector is arranged between the air outlet and the heat accumulator.
[0017] Preferably, the hot air furnace further comprises a drying box, the drying box is provided with a drying agent, a three-way valve is arranged between the dust collector and the heat accumulator, and the drying box is in communication with the three-way valve and the heat accumulator.
[0018] When the high-temperature hot air furnace works, the dust collector, the three-way valve, the drying box and the heat accumulator are sequentially communicated.
[0019] Preferably, the collecting device further comprises a collecting mesh bag arranged in the collecting device.
[0020] The collecting mesh bag has a bag opening, and the bag opening is sleeved on the collecting port.
[0021] The feeding port is in rotational sealing communication with the air inlet, and the outlet is in rotational sealing communication with the collecting port.
[0022] Preferably, the hot air furnace further comprises a gas flow sensor, and the gas flow sensor is arranged in the gas circulation.
[0023] When the gas flow sensor determines that the gas delivered by the gas circulation is insufficient, the air supplementing valve and the air blower are opened to supplement air, and the air supplementing valve and the air blower are in a closed state after the air supplementing is completed.
[0024] Preferably, the heat conduction channel heats the airflow passing through the heat conduction channel to a high-temperature airflow with a temperature of 450-550℃.
[0025] The beneficial effects of the present application are that: through the cooperation of multiple air supplementing rings with multiple rows of air supplementing rings, combined with air feeding circulation, the inner cylinder rotates under the power of the motor, so that the fresh tea leaves reach the highest point and then fall, and the heated gas fed by the air feeding circulation can exchange heat, realizing high-temperature fixation of the tea leaves, and through the setting of the sensing column, the temperature sensor can capture the change of the temperature, and once the temperature of a certain part is insufficient, the corresponding air supplementing valve can be controlled to open, so that hot air flow can be supplemented from the air supplementing port to realize heating of the area, realizing more uniform heating. And the inner diameter of the inner cylinder gradually decreases from the feeding end to the discharging end, and due to the effect of air feeding circulation, the tea leaves will be pushed towards the discharging port, and due to the need for sufficient fixation time of the tea leaves, through the setting of the slope, the tea leaves can be conveniently returned under the action of gravity, and once the fixation is completed, the air supplementing valve can be completely opened, and the tea leaves can be discharged together, improving the efficiency. BRIEF DESCRIPTION OF DRAWINGS
[0026] Figure 1 FIG. 1 is a structural schematic view of a hot blast furnace used in a tea leaf fixation method according to an embodiment of the present application;
[0027] Label explanation: 1, heating furnace; 11, heat conduction channel; 12, air feeding valve; 2, fixation assembly; 21, outer shell; 22, inner cylinder; 221, feeding end; 222, discharging end; 23, collecting device; 231, collecting port; 232, air outlet; 24, motor; 25, sensing column; 251, connecting part; 252, sensing part; 26, air supplementing ring; 3, circulation assembly; 31, air inlet; 32, circulation fan; 33, air blower; 34, heat accumulator; 35, dust collector; 36, drying box; 37, three-way valve; 38, air supplementing pipe. DETAILED DESCRIPTION
[0028] In order to explain the technical content, the purposes and effects of the present application in detail, the following will be described in combination with the embodiments and the accompanying drawings.
[0029] Please refer to Figure 1 A tea leaf fixation method, using a hot blast furnace for fixation, the hot blast furnace comprising a heating furnace 1, a circulation assembly 3 and a fixation assembly 2;
[0030] The heating furnace 1 is provided with a heat conduction channel 11; the heat conduction channel 11 is provided with an air feeding valve 12 at the inlet;
[0031] The fixation assembly 2 comprises an outer shell 21, an inner cylinder 22, a collection device 23, a motor 24, a sensing column 25, a plurality of air supplement rings 26, the inner cylinder 22 is rotationally arranged in the outer shell 21, the motor 24 drives the inner cylinder 22 to rotate in the outer shell 21, the inner cylinder 22 comprises a feeding end 221 and a discharging end 222, the inner diameter of the inner cylinder 22 gradually decreases from the feeding end 221 to the discharging end 222; the feeding end 221 of the inner cylinder 22 is provided with a feeding port, and the discharging end 222 is provided with a discharging port; a plurality of air supplement rings are coaxially arranged on the side wall of the inner cylinder 22, the air supplement ring comprises a plurality of air supplement ports, the air supplement ring 26 is rotationally and sealingly arranged on the outer periphery of the air supplement ring 26; the air supplement ring 26 is provided with an air supplement valve; a plurality of temperature sensors are arranged on the sensing column 25, and the sensing column 25 is coaxially arranged with the inner cylinder 22.
[0032] The collection device 23 comprises a collection port 231 and an air outlet 232, and the collection port 231 is communicated with the discharging port.
[0033] The circulation assembly 3 comprises an air inlet 31, a circulating fan 32 and a blower 33; the air supplement valve is communicated with the air inlet 31 through an air supplement pipe 38.
[0034] The air outlet 232, the circulating fan 32, the heat conduction channel 11, the air inlet 31 and the feeding port are sequentially communicated to form a gas circulation.
[0035] From the above description, through the cooperation of the plurality of air supplement rings 26 and the multiple rows of air supplement rings, combined with the gas circulation, the inner cylinder 22 rotates under the power of the motor 24, so that the fresh tea leaves reach the highest point and then fall, the heated gas circulated by the gas circulation can be exchanged, the high-temperature fixation of the tea leaves is realized, and through the arrangement of the sensing column 25, the temperature sensor can capture the change of the temperature, once the temperature of a part is insufficient, the corresponding air supplement valve can be controlled to open, so that the hot gas flow can be supplemented from the air supplement port to realize the heating of the region, and more uniform heating is realized. And through the gradually decreasing inner diameter of the inner cylinder 22 from the feeding end 221 to the discharging end 222, under the action of the gas circulation, the tea leaves will be pushed to the discharging port, and through the slope setting, the tea leaves can be conveniently returned under the action of gravity, and once the fixation is completed, the air supplement valve can be completely opened, the tea leaves can be sent out together, and the efficiency is improved.
[0036] Further, the air supplement port is inclinedly arranged towards the discharging port.
[0037] From the above description, through the inclined arrangement of the air supplement port, the interference between the air flows can be reduced.
[0038] Further, the sensing column 25 comprises a connecting part 251 and a sensing part 252, the connecting part 251 is connected in the collecting port 231, one end of the sensing part 252 is connected with the connecting part 251, and the other end is arranged towards the feeding port, and the sensing part 252 is coaxially arranged with the inner cylinder 22.
[0039] One of the temperature sensors is arranged on the end of the sensing part 252 towards the feeding port.
[0040] From the above description, it can be seen that by arranging one of the temperature sensors on the end of the sensing part 252 towards the feeding port, the temperature of the entering air flow can be monitored in real time to determine whether it meets the requirements, and the temperature of the heating furnace 1 can be adjusted in time.
[0041] Further, when the fixation is completed, the heating furnace 1 and the air feeding valve 12 stop working, and after the circulating fan 32 and the air supplementing valve are fully opened, the tea leaves in the inner cylinder 22 are blown into the collecting device 23 to stop working.
[0042] Further, the circulating assembly 3 further comprises a heat accumulator 34, which is arranged between the air outlet 232 and the circulating fan 32.
[0043] From the above description, it can be seen that the air flow is circulated in the air feeding circulation for multiple times, the residual heat can be recycled by the heat accumulator 34 each time, the heat loss is reduced, and energy saving is achieved.
[0044] Further, a dust collector 35 is arranged between the air outlet 232 and the heat accumulator 34.
[0045] From the above description, it can be seen that by arranging the dust collector 35, the excess tea dust can be collected, and the dust is prevented from entering the circulation or causing a dust explosion danger.
[0046] Further, the hot air furnace further comprises a drying box 36, the drying box 36 has a drying agent, a three-way valve 37 is arranged between the dust collector 35 and the heat accumulator 34, and the drying box 36 is in communication with the three-way valve 37 and the heat accumulator 34.
[0047] When the high-temperature hot air furnace works, the dust collector 35, the three-way valve 37, the drying box 36 and the heat accumulator 34 are sequentially communicated.
[0048] From the above description, it can be seen that by the drying box 36, the water content of the air flow in the circulation can be reduced, and the fixation effect is improved.
[0049] Further, the collecting device 23 further comprises a collecting net bag arranged in the collecting device 23.
[0050] The collecting net bag has a bag opening, and the bag opening is sleeved on the collecting port 231.
[0051] The feeding port is in rotational sealing communication with the air inlet 31, and the outlet is in rotational sealing communication with the collecting port 231.
[0052] From the above description, it can be seen that the tea leaves can be conveniently collected through the setting of the net bag.
[0053] Further, the hot blast stove further comprises a gas flow sensor, which is arranged in the gas supply circulation.
[0054] When the gas flow sensor determines that the gas supplied by the gas supply circulation is insufficient, the gas supply valve 12 and the air blower 33 are opened to supplement the gas, and after the gas supplement is completed, the gas supply valve 12 and the air blower 33 are in a closed state.
[0055] From the above description, it can be seen that the gas supply valve 12 and the air blower 33 are arranged to supply gas to the circulation, avoiding insufficient gas.
[0056] Further, the gas flow passing through the heat conduction channel 11 is heated to a high-temperature gas flow of 450-550°C.
[0057] Embodiment one
[0058] A tea leaf fixation method, using a hot blast stove for fixation, the hot blast stove comprising a heating furnace 1, a circulation assembly 3 and a fixation assembly 2.
[0059] The heating furnace 1 is provided with a heat conduction channel 11; the heat conduction channel 11 is provided with a gas supply valve 12 at the inlet thereof.
[0060] The fixation assembly 2 comprises an outer shell 21, an inner cylinder 22, a collecting device 23, a motor 24, a sensing column 25, a plurality of gas supplement rings 26, the inner cylinder 22 is rotationally arranged in the outer shell 21, the motor 24 drives the inner cylinder 22 to rotate in the outer shell 21, the inner cylinder 22 comprises a feeding end 221 and a discharging end 222, the inner diameter of the inner cylinder 22 gradually decreases from the feeding end 221 to the discharging end 222; the feeding end 221 of the inner cylinder 22 is provided with a feeding port, and the discharging end 222 is provided with a discharging port; a plurality of gas supplement rings coaxially arranged are arranged on the side wall of the inner cylinder 22, the gas supplement ring comprises a plurality of gas supplement ports, the gas supplement ring 26 is rotationally and sealingly arranged on the outer periphery of the gas supplement ring 26; the gas supplement ring 26 is provided with a gas supplement valve; a plurality of temperature sensors are arranged on the sensing column 25, and the sensing column 25 is coaxially arranged with the inner cylinder 22.
[0061] The collecting device 23 comprises a collecting port 231 and an air outlet 232, and the collecting port 231 is in communication with the discharging port.
[0062] The circulating assembly 3 comprises an air inlet channel 31, a circulating fan 32 and a blower 33; the air injection valve 12 is communicated with the blower 33, and the air supplement valve is communicated with the air inlet channel 31 through an air supplement pipe 38.
[0063] The air outlet 232, the circulating fan 32, the heat conduction channel 11, the air inlet channel 31 and the material inlet are sequentially communicated to form a gas circulation.
[0064] The air supplement port is obliquely arranged towards the material outlet.
[0065] The sensing column 25 comprises a connecting part 251 and a sensing part 252; the connecting part 251 is connected in the collecting port 231, one end of the sensing part 252 is connected with the connecting part 251, and the other end is arranged towards the material inlet; and the sensing part 252 is coaxially arranged with the inner cylinder 22.
[0066] One of the temperature sensors is arranged on the end of the sensing part 252 towards the material inlet.
[0067] After the fixation is completed, the heating furnace 1 and the air injection valve 12 stop working, and the circulating fan 32 and the air supplement valve are all opened to blow the tea leaves in the inner cylinder 22 into the collecting device 23 to stop working.
[0068] The circulating assembly 3 further comprises a heat accumulator 34, which is arranged between the air outlet 232 and the circulating fan 32.
[0069] A dust collector 35 is arranged between the air outlet 232 and the heat accumulator 34.
[0070] The hot blast stove further comprises a drying box 36, which contains a drying agent; a three-way valve 37 is arranged between the dust collector 35 and the heat accumulator 34; and the drying box 36 is communicated with the three-way valve 37 and the heat accumulator 34 respectively.
[0071] When the high-temperature hot blast stove works, the dust collector 35, the three-way valve 37, the drying box 36 and the heat accumulator 34 are sequentially communicated.
[0072] The collecting device 23 further comprises a collecting net bag arranged in the collecting device 23.
[0073] The collecting net bag has a bag opening, which is sleeved on the collecting port 231.
[0074] The material inlet is in rotational sealing communication with the air inlet channel 31, and the outlet is in rotational sealing communication with the collecting port 231.
[0075] The hot blast stove further comprises a gas flow sensor, which is arranged in the gas circulation.
[0076] When the gas flow sensor determines that the gas circulating conveying is insufficient, the gas filling valve 12 and the air blower 33 are opened to supplement the gas, and after the gas supplement is completed, the gas filling valve 12 and the air blower 33 are in a closed state.
[0077] The heat-conducting channel 11 heats the gas flow passing through it to a high-temperature gas flow of 450-550°C.
[0078] Embodiment two
[0079] A tea leaf fixation method, using a hot blast furnace for fixation, the hot blast furnace comprising a heating furnace 1, a circulating assembly 3 and a fixation assembly 2;
[0080] The heating furnace 1 is provided with a heat-conducting channel 11; the heat-conducting channel 11 is provided with a gas filling valve 12 at the inlet thereof;
[0081] The fixation assembly 2 comprises an outer shell 21, an inner cylinder 22, a collecting device 23, a motor 24, a sensing column 25, a plurality of gas supplement rings 26, the inner cylinder 22 is rotationally arranged in the outer shell 21, the motor 24 drives the inner cylinder 22 to rotate in the outer shell 21, the inner cylinder 22 comprises a feeding end 221 and a discharging end 222, the inner diameter of the inner cylinder 22 gradually decreases from the feeding end 221 to the discharging end 222; the feeding end 221 of the inner cylinder 22 is provided with a feeding port, and the discharging end 222 is provided with a discharging port; the side wall of the inner cylinder 22 is provided with a plurality of coaxially arranged gas supplement rings, the gas supplement ring comprises a plurality of gas supplement ports, the gas supplement ring 26 is rotationally and sealingly arranged on the outer periphery of the gas supplement ring 26; the gas supplement ring 26 is provided with a gas supplement valve; a plurality of temperature sensors are arranged on the sensing column 25, and the sensing column 25 is coaxially arranged with the inner cylinder 22;
[0082] The collecting device 23 comprises a collecting port 231 and an air outlet 232, and the collecting port 231 is in communication with the discharging port;
[0083] The circulating assembly 3 comprises an air inlet channel 31, a circulating fan 32 and an air blower 33; the gas filling valve 12 is in communication with the air blower 33, and the gas supplement valve is in communication with the air inlet channel 31 through a gas supplement pipe 38;
[0084] The air outlet 232, the circulating fan 32, the heat-conducting channel 11, the air inlet channel 31 and the feeding port are sequentially communicated to form a gas circulating system.
[0085] The gas supplement ports are obliquely arranged towards the discharging port.
[0086] The sensing column 25 comprises a connecting part 251 and a sensing part 252, the connecting part 251 is connected in the collecting port 231, one end of the sensing part 252 is connected with the connecting part 251, and the other end is arranged towards the feeding port, and the sensing part 252 is coaxially arranged with the inner cylinder 22;
[0087] One of the temperature sensors is arranged on an end of the sensing part 252 facing the feeding port.
[0088] When the fixation is completed, the heating furnace 1 and the gas feeding valve 12 stop working, and the circulating fan 32 and the air supplement valve are all opened to blow the tea in the inner cylinder 22 into the collecting device 23 and stop working.
[0089] The collecting device 23 further comprises a collecting mesh bag arranged in the collecting device 23.
[0090] The collecting mesh bag has a bag opening which is sleeved on the collecting port 231.
[0091] The feeding port is in rotational sealing communication with the air inlet 31, and the outlet is in rotational sealing communication with the collecting port 231.
[0092] The hot air furnace further comprises a gas flow sensor which is arranged in the gas circulating system.
[0093] When the gas flow sensor judges that the gas delivered by the gas circulating system is insufficient, the gas feeding valve 12 and the air blower 33 are opened to supplement the gas, and after the gas supplement is completed, the gas feeding valve 12 and the air blower 33 are in a closed state.
[0094] The gas flow passing through the heat conduction channel 11 is heated to a high-temperature gas flow with a temperature of 450-550℃.
[0095] The above is only an embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent transformation or direct or indirect application in the related technical field by using the content of the specification and drawings of the present application is also included in the patent protection scope of the present application.
Claims
1. A method for fixing tea leaves, characterized in that, A hot air furnace is used for blanching, the hot air furnace including a heating furnace, a blanching assembly and a circulation assembly; The heating furnace is equipped with a heat conduction channel; a gas filling valve is installed at the inlet of the heat conduction channel. The blanching assembly includes an outer shell, an inner cylinder, a collecting device, a motor, a sensing column, and multiple air-injecting rings. The inner cylinder is rotatably mounted inside the outer shell, and the motor drives the inner cylinder to rotate within the outer shell. The inner cylinder includes a feed end and a discharge end, with the inner diameter gradually decreasing from the feed end to the discharge end. The feed end of the inner cylinder has a feed inlet, and the discharge end has a discharge outlet. Multiple rows of coaxially arranged air-injecting rings are arranged on the side wall of the inner cylinder, each air-injecting ring including multiple air-injection ports. Air-injecting rings are rotatably and sealingly fitted onto the outer circumference of the air-injecting rings. Air-injecting valves are provided on the air-injecting rings. Multiple temperature sensors are mounted on the sensing column, which is coaxially arranged with the inner cylinder. The collecting device includes a collecting port and an air outlet, and the collecting port is connected to the discharging port. The circulation assembly includes an air intake duct, a circulation fan, and a blower; the gas filling valve is connected to the blower, and the gas replenishment valve is connected to the air intake duct through a gas replenishment pipe; The air outlet, circulating fan, heat conduction channel, air inlet, and feed inlet are connected in sequence to form an air supply circulation.
2. The method for fixing tea leaves according to claim 1, characterized in that, The air inlet is inclined toward the discharge outlet.
3. The method for fixing tea leaves according to claim 1, characterized in that, The sensing column includes a connecting part and a sensing part. The connecting part is connected to the collection port. One end of the sensing part is connected to the connecting part, and the other end is set towards the feed port. The sensing part is coaxially arranged with the inner cylinder. One of the temperature sensors is located on the end of the sensing unit facing the feed inlet.
4. The method for fixing tea leaves according to claim 1, characterized in that, Once the tea leaves are processed, the heating furnace and gas valve stop working, and the circulating fan and gas replenishment valve are fully opened to blow the tea leaves in the inner cylinder into the collection device, at which point the process stops.
5. The method for fixing tea leaves according to claim 1, characterized in that, The circulation assembly also includes a heat storage body, which is disposed between the air outlet and the circulating fan.
6. The method for fixing tea leaves according to claim 5, characterized in that, A dust collector is installed between the air outlet and the heat storage body.
7. The method for fixing tea leaves according to claim 6, characterized in that, The hot air furnace also includes a drying box containing a desiccant. A three-way valve is provided between the dust collector and the heat storage body. The drying box is connected to the three-way valve and the heat storage body respectively. When the high-temperature hot air furnace is in operation, the dust collector, three-way valve, drying box, and heat storage body are connected in sequence.
8. The method for fixing tea leaves according to claim 1, characterized in that, The collection device also includes a collection net bag disposed within the collection device; The collecting net bag has an opening, which is fitted onto the collecting opening; The feed inlet is rotary sealed to the air inlet, and the outlet is rotary sealed to the collection port.
9. The method for fixing tea leaves according to claim 1, characterized in that, The hot air furnace also includes a gas flow sensor, which is installed within the gas supply circulation. When the gas flow sensor determines that the gas being delivered in the gas circulation is insufficient, the gas filling valve and blower are opened to replenish the gas. After the gas replenishment is completed, the gas filling valve and blower are closed.
10. The method for fixing tea leaves according to claim 1, characterized in that, The heat-conducting channel heats the passing airflow to a high temperature of 450℃-550℃.