A gas-fired hot air circulating disinfection device

Abstract

This invention relates to a gas-fired hot air circulating sterilization device, comprising a sterilization chamber and a combustion chamber disposed on the side of the sterilization chamber. The air outlet of the combustion chamber is connected to the inner cavity of the sterilization chamber through a high-temperature exhaust gas heat dissipation pipe, and the air inlet of the combustion chamber is connected to the sterilization chamber through an air inlet pipe filtered by a filter assembly. This invention relates to the field of gas-fired hot air circulating sterilization technology. This gas-fired hot air circulating sterilization device, through the cascade utilization of thermal energy and adsorption-regeneration dynamic switching technology, solves the pain points of traditional gas-fired hot air sterilization equipment such as high energy consumption, poor humidity control, and frequent maintenance. It is suitable for food processing, medical devices, laboratory sterilization, and other fields, promoting the greening and intelligent upgrading of high-temperature sterilization processes.

Description

Technical Field

[0001] This invention relates to the field of gas-fired hot air circulation disinfection technology, specifically a gas-fired hot air circulation disinfection device. Background Technology

[0002] Traditional gas-fired hot air circulating sterilization equipment is widely used in food processing, medical device sterilization, and other fields. Its core function is to kill microorganisms and remove moisture through high-temperature gas. However, existing technologies have the following prominent problems:

[0003] 1. Technical defects of traditional equipment

[0004] High energy consumption and waste of thermal energy

[0005] Low hot air circulation efficiency: Traditional equipment relies on the combustion chamber to continuously heat the air, but the hot and humid exhaust gas (containing a large amount of latent heat) is directly discharged, and the thermal energy utilization rate is less than 40%.

[0006] Frequent start-stop losses: Heat is rapidly lost when the equipment is opened for loading and unloading, and reheating energy consumption increases by more than 50%.

[0007] Humidity control and regeneration challenges

[0008] Uncontrollable humidity: Moisture accumulation during the disinfection process leads to fluctuations in ambient humidity (±20% RH), affecting the sterilization effect (e.g., bacteria grow in condensate).

[0009] Adsorption material regeneration is difficult: When using zeolite or silica gel to adsorb moisture, the machine needs to be shut down, disassembled, and manually baked at high temperature (200-300℃), resulting in a long regeneration cycle (2-4 hours) and low equipment utilization.

[0010] Structural design limitations

[0011] Static adsorption system: The airflow distribution in the fixed zeolite bed is uneven, and it is difficult to desorb from the deep pores, resulting in a regeneration efficiency of only 60% to 70%.

[0012] Poor sealing: High-temperature deformation leads to air leakage in the cavity (leakage rate > 5%), resulting in a decrease in adsorption efficiency.

[0013] Zeolite pulverization leakage: Particles break due to mechanical vibration, clogging pipes or contaminating the combustion chamber.

[0014] Security risks

[0015] Pressure runaway: Expansion of hot and humid gas can easily cause overpressure in the cavity. Traditional equipment lacks a rapid pressure relief mechanism, which poses a risk of explosion.

[0016] 2. Industry Improvement Attempts and Limitations

[0017] Dual-tower adsorption system: It uses two sets of zeolite towers to adsorb and regenerate alternately, but the switching cycle is long (30-60 minutes), and it still requires an external heat source, resulting in high energy consumption.

[0018] Waste heat recovery from heat exchangers: Sensible heat is recovered but latent heat (heat of water vapor condensation) is ignored, and the heat exchanger is easily corroded and has a short lifespan.

[0019] Composite adsorbent materials: mixing zeolite and activated alumina increases capacity, but conflicts in regeneration temperature lead to material performance degradation. Summary of the Invention

[0020] To address the shortcomings of existing technologies, this invention provides a gas-fired hot air circulation disinfection device, which solves the problems mentioned above.

[0021] To achieve the above objectives, the present invention is implemented through the following technical solution: a gas-fired hot air circulation disinfection device, comprising a disinfection chamber and a combustion chamber disposed on the side of the disinfection chamber, wherein the air outlet of the combustion chamber is connected to the inner cavity of the disinfection chamber through a high-temperature exhaust gas heat dissipation pipe, and the air inlet of the combustion chamber is connected to the disinfection chamber through an air inlet pipe filtered by a filter assembly, wherein the filter assembly includes a filter box fixed on the side of the disinfection chamber.

[0022] The filter box has a filter chamber and a regeneration chamber on both sides. The inner cavity of the regeneration chamber is connected to the combustion chamber of the combustion chamber through a regeneration pipe. The inner cavity of the filter box is rotatably connected to a rotating frame driven by a drive shaft. The rotating frame is symmetrically arranged on both sides of the filter chamber and the regeneration chamber. The inner cavity of the rotating frame is divided into two zeolite placement chambers by a partition plate. Zeolite particles are placed in the inner cavity of both zeolite placement chambers. Filter screen frames are arranged above and below the two zeolite placement chambers. The upper filter screen frame is fixed in the inner cavity of the zeolite placement chamber, and the lower filter screen frames are slidably connected in the inner cavity of the zeolite placement chamber through an elastic mechanism. The rotating frame located in the inner cavity of the filter chamber is slidably sealed to the inner cavity of the filter chamber. The height of the regeneration chamber is twice the height of the filter chamber.

[0023] As a further aspect of the present invention: the inner cavity of the disinfection chamber is provided with a hollow cavity, through which the absorbed moisture is stored, and the heat therein is used to form an insulation layer, which effectively keeps the inner cavity of the disinfection chamber warm. Even when the door is opened for loading and unloading, a certain temperature can be maintained, and reheating is faster.

[0024] As a further aspect of the present invention: the elastic mechanism includes a fixed frame fixed to the side of the partition plate, and a return spring fixedly connected to the bottom of the fixed frame. The bottom end of the return spring is fixedly connected to the surface of the filter screen frame. When the zeolite placement chamber is inside the filter chamber, the inner wall of the filter chamber is tightly attached to the upper and lower parts of the rotating frame, which squeezes the filter screen frame and compacts the zeolite inside. Then, the hot and humid gas recovered through the air intake pipe absorbs water from the zeolite particles inside the zeolite placement chamber and re-enters the combustion chamber for heating and recycling. When the zeolite particles inside one side of the zeolite placement chamber have adsorbed a certain amount of water, the rotating frame is driven to rotate by the drive shaft, switching the zeolite placement chamber in the filter chamber and the regeneration chamber. At this time, the filter screen frame located inside the zeolite placement chamber descends a certain distance under the push of the return spring. At this time, gaps appear in the middle of the zeolite inside. Then, high-heat gas is input into the regeneration chamber through the regeneration pipe of the combustion chamber to desorb the zeolite in the regeneration chamber at high temperature. At this time, the zeolite in the filter chamber is normally adsorbed. The desorbed hot and humid gas is input into the hollow cavity through the circulation pipe for normal heat utilization.

[0025] As a further aspect of the present invention: the top of the inner cavity of the regeneration chamber is connected to the inner cavity of the hollow cavity through a circulation pipe, and the water-containing high-heat gas desorbed by zeolite is introduced into the hollow cavity through the circulation pipe.

[0026] As a further aspect of the present invention: the top of the disinfection chamber is provided with a pressure relief channel communicating with the hollow cavity. When the internal air pressure of the hollow cavity is too high, the internal gas is discharged upward through the pressure relief channel to prevent the internal pressure from being too high.

[0027] As a further aspect of the present invention: an abutment rod is fixedly connected to the bottom of the inner cavity of the regeneration chamber, and the abutment rod supports the filter screen frame below to prevent it from falling excessively.

[0028] As a further aspect of the present invention: the lower outer ring of the filter screen frame is provided with a guide slope that gradually decreases from the center of the filter screen frame toward the periphery. With the setting of the guide slope, when the rotating frame rotates, the guide slope of the filter screen frame first contacts the inner wall of the filter cavity, squeezes the filter screen frame, and makes it move upward to squeeze the zeolite particles.

[0029] Compared with the prior art, the present invention has the following advantages:

[0030] Disinfection and humid heat gas circulation

[0031] The combustion chamber generates high-temperature gas, which enters the sterilization chamber through the high-temperature exhaust gas heat dissipation pipe to sterilize the instruments.

[0032] The hot, humid gas enters the filter chamber of the filter box through the intake pipe, where the moisture is adsorbed by the zeolite particles. The dried gas is then returned to the combustion chamber for recirculation and heating.

[0033] Zeolite Adsorption and Compaction

[0034] Inside the filter chamber, the zeolite placement chamber of the rotating frame is squeezed by the filter chamber wall through an elastic mechanism, resulting in a dense arrangement of zeolite particles and improved adsorption efficiency.

[0035] When hot, humid gas flows through zeolite, the moisture is selectively adsorbed, and the dried gas enters the combustion chamber for reuse.

[0036] Zeolite regeneration and heat recovery

[0037] Once the zeolite is saturated with adsorption, the drive shaft rotates 180° to switch the zeolite placement chamber to the regeneration chamber.

[0038] The regeneration chamber is twice the height of the filtration chamber. The reset spring releases the pressure, the filter screen moves down, and gaps are formed between the zeolite particles.

[0039] High-temperature gas is introduced into the regeneration chamber through the regeneration pipe to desorb the moisture in the zeolite. The generated high-temperature humid gas is then introduced into the hollow cavity through the circulation pipe to store heat.

[0040] Heat storage and pressure balance

[0041] The hollow cavity utilizes the residual heat from the desorbed moisture to form an insulation layer, reducing heat loss in the disinfection chamber.

[0042] When the air pressure is too high, the pressure relief channel will automatically release air to ensure equipment safety.

[0043] Periodic switching and continuous operation

[0044] The rotating frame rotates periodically, causing the zeolite in the two chambers to be adsorbed and regenerated alternately, thus achieving uninterrupted operation. Attached Figure Description

[0045] Figure 1 This is a partial structural cross-sectional view of the present invention;

[0046] Figure 2 This is a cross-sectional view of the filter box of the present invention;

[0047] Figure 3 For the present invention Figure 2 A magnified view of a section at point A in the middle;

[0048] Figure 4 This is a bottom view of the rotating frame structure of the present invention.

[0049] In the diagram: 1. Disinfection chamber; 2. Hollow cavity; 3. Combustion chamber; 4. High-temperature exhaust gas heat dissipation pipe; 5. Inlet pipe; 6. Filter box; 8. Pressure relief channel; 9. Filter chamber; 10. Regeneration chamber; 11. Drive shaft; 12. Rotating frame; 13. Regeneration pipe; 14. Circulation pipe; 15. Partition plate; 16. Fixing frame; 17. Return spring; 18. Zeolite particles; 19. Filter screen frame; 20. Abutment rod; 21. Guide slope. Detailed Implementation

[0050] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0051] Please see Figure 1-4 This invention provides a technical solution: a gas-fired hot air circulating disinfection device, comprising a disinfection chamber 1 and a combustion chamber 3 disposed on the side of the disinfection chamber 1. The outlet of the combustion chamber 3 is connected to the inner cavity of the disinfection chamber 1 through a high-temperature exhaust gas heat dissipation pipe 4. The inlet of the combustion chamber 3 is connected to the disinfection chamber 1 through an inlet pipe 5 filtered by a filter assembly. The filter assembly includes a filter box 6 fixed on the side of the disinfection chamber 1. The output end of the combustion chamber 3 is provided with a high-temperature exhaust gas heat dissipation pipe 4, which penetrates the disinfection chamber 1. A heat exchanger is fixedly installed inside the disinfection chamber 1. The air inside the combustion chamber 3 forms a heat source. The heat source passes through the heat exchanger in the disinfection chamber 1 and exchanges heat with the heat exchanger. The heat exchanger releases heat into the disinfection chamber 1, causing the temperature inside the disinfection chamber 1 to rise rapidly, thereby disinfecting the equipment at high temperature. By setting a circulating fan, a circulating hot airflow is formed in the disinfection chamber 1 to facilitate thorough disinfection. The gas after heat exchange is discharged through an exhaust fan.

[0052] The filter box 6 has a filter chamber 9 and a regeneration chamber 10 on its two sides respectively. The inner cavity of the regeneration chamber 10 is connected to the combustion chamber of the combustion chamber 3 through the regeneration pipe 13. The inner cavity of the filter box 6 is rotatably connected to a rotating frame 12 driven by a drive shaft 11. The rotating frame 12 is symmetrically arranged on both sides of the inner cavity of the filter chamber 9 and the regeneration chamber 10 respectively. The inner cavity of the rotating frame 12 is divided into two zeolite placement chambers by a partition plate 15. Zeolite particles 18 are placed in the inner cavity of both zeolite placement chambers. Filter screen frames 19 are arranged above and below the two zeolite placement chambers. The upper filter screen frame 19 is fixed in the inner cavity of the zeolite placement chamber. The lower filter screen frame 19 is slidably connected in the inner cavity of the zeolite placement chamber through an elastic mechanism. The rotating frame 12 located in the inner cavity of the filter chamber 9 is slidably sealed to the inner cavity of the filter chamber 9. The height of the regeneration chamber 10 is twice the height of the filter chamber 9.

[0053] The inner cavity of the disinfection chamber 1 is equipped with a hollow cavity 2, which stores the absorbed moisture and uses the heat inside to form an insulation layer, effectively keeping the inner cavity of the disinfection chamber 1 warm. Even when the door is opened for loading and unloading, a certain temperature can be maintained, and reheating is faster.

[0054] The elastic mechanism includes a fixing frame 16 fixed to the side of the partition plate 15. A return spring 17 is fixedly connected to the bottom of the fixing frame 16. The bottom end of the return spring 17 is fixedly connected to the surface of the filter screen frame 19. When the zeolite placement chamber is inside the filter chamber 9, the inner wall of the filter chamber 9 is tightly attached to the upper and lower parts of the rotating frame 12, squeezing the filter screen frame 19 and compacting the zeolite inside. Then, the humid and hot gas recovered through the intake pipe 5 passes through the zeolite particles 18 inside the zeolite placement chamber, absorbs water, and re-enters the combustion chamber 3 for heating and recycling. When the zeolite particles inside one side of the zeolite placement chamber absorb water... After a certain period of time, the rotating frame 12 is driven by the drive shaft 11 to rotate, switching the zeolite placement chamber in the filter chamber 9 and the regeneration chamber 10. At this time, the filter screen frame 19 located inside the zeolite placement chamber is pushed down a certain distance by the reset spring 17. At this time, gaps appear in the middle of the zeolite inside. Then, high-temperature gas is introduced into the regeneration chamber 10 through the regeneration pipe 13 of the combustion chamber 3 to desorb the zeolite in the regeneration chamber 10 at high temperature. At this time, the zeolite in the filter chamber 9 is normally adsorbed. The desorbed high-temperature hot steam is introduced into the hollow cavity 2 through the circulation pipe 14 for normal heat utilization.

[0055] The top of the inner cavity of the regeneration chamber 10 is connected to the inner cavity of the hollow cavity 2 through the circulation pipe 14, and the water-containing high-heat gas desorbed by zeolite is introduced into the hollow cavity 2 through the circulation pipe 14.

[0056] The top of the disinfection chamber 1 is equipped with a pressure relief channel 8 that communicates with the hollow cavity 2. When the internal air pressure of the hollow cavity 2 is too high, the internal gas is discharged upward through the pressure relief channel 8 to prevent the internal pressure from being too high.

[0057] A stop rod 20 is fixedly connected to the bottom of the inner cavity of the regeneration chamber 10. The stop rod 20 supports the filter screen frame 19 below and prevents it from falling excessively.

[0058] The lower outer ring of the filter screen frame 19 is provided with a guide slope 21 that gradually decreases from the center of the filter screen frame 19 toward the periphery. With the setting of the guide slope 21, when the rotating frame 12 rotates, the guide slope 21 of the filter screen frame 19 first contacts the inner wall of the filter chamber 9, and squeezes the filter screen frame 19, causing it to move upward and squeeze the zeolite particles 18.

[0059] In use, this invention achieves efficient disinfection and energy-saving operation through a dynamic adsorption-regeneration system, closed-loop utilization of thermal energy, and intelligent pressure control. The specific process is as follows:

[0060] 1. Hot air generation and disinfection cycle

[0061] Combustion chamber heating

[0062] The combustion chamber 3 generates high-temperature gas at 300-500°C, which is then introduced into the disinfection chamber 1 through the high-temperature exhaust gas heat dissipation pipe 4 to sterilize the materials at high temperature.

[0063] Moist heat gas recovery

[0064] The disinfected humid and hot gas, containing moisture and residual heat, enters the filter chamber 9 of the filter box 6 through the air inlet pipe 5.

[0065] 2. Zeolite adsorption and dynamic switching

[0066] Filter chamber adsorption

[0067] Zeolite compaction seal:

[0068] When the zeolite placement chamber of the rotating frame 12 enters the filter chamber 9, the inner wall of the chamber squeezes the filter screen frame 19, the return spring 17 is compressed, and the zeolite particles 18 are compacted to form a dense adsorption layer.

[0069] The function of guide ramp 21: When the rotating frame is switched, the ramp will first contact the cavity wall and gradually squeeze the filter screen frame to ensure sealing and prevent air leakage.

[0070] Moisture adsorption: When hot, humid gas flows through the zeolite layer, water molecules are selectively adsorbed, and the dry gas is returned to the combustion chamber for recirculation heating.

[0071] Desorption of regeneration chamber

[0072] Switching mechanism: When the zeolite adsorption on one side is saturated, the drive shaft 11 rotates 180° to move the zeolite placement chamber to the regeneration chamber 10.

[0073] Pore ​​formation:

[0074] The height of the regeneration chamber 10 is twice that of the filter chamber. The reset spring 17 releases the pressure, the filter screen 19 moves down, and gaps are formed between the zeolite particles.

[0075] Stop bar 20 limit: Prevents excessive sag of the filter frame and protects the elastic mechanism.

[0076] High-temperature desorption: High-temperature gas (250-350°C) is introduced into the regeneration chamber 10 through the regeneration pipe 13, penetrating the zeolite layer to desorb moisture. The generated high-temperature humid gas is introduced into the hollow cavity 2 through the circulation pipe 14.

[0077] 3. Heat recovery and pressure balance

[0078] Hollow cavity insulation

[0079] After desorption, the high-temperature humid gas enters the hollow cavity 2, and its heat forms an insulation layer, reducing heat loss in the disinfection chamber 1 by 40% to 60%.

[0080] Rapid heating: After the equipment door is opened, the hollow cavity 2 maintains a base temperature of 80-100℃, and the reheating time is shortened by 50%.

[0081] Pressure relief safety mechanism

[0082] The top of the hollow cavity 2 is equipped with a pressure relief channel 8. When the internal air pressure exceeds the threshold, the gas is automatically discharged to avoid the risk of overpressure.

[0083] 4. Periodic switching and continuous operation

[0084] Drive shaft 11 periodically switches the rotating frame 12 according to preset time or humidity sensor signals, realizing alternating adsorption and regeneration of zeolite in two chambers, so that the equipment can run continuously without stopping.

[0085] Summary of technical advantages

[0086] Energy-efficient

[0087] Closed-loop utilization of thermal energy reduces overall energy consumption by 40%, dynamic regeneration of zeolite reduces downtime, and equipment utilization increases by 30%.

[0088] Precise humidity control

[0089] Humidity fluctuations are controlled within ±5%RH to avoid condensate contamination, and the sterilization pass rate is increased to over 98%.

[0090] Safe and reliable

[0091] The pressure relief channel 8 and the abutment rod 20 are designed to ensure the safe operation of the equipment, and the zeolite anti-pulverization structure extends the service life to more than 3 years.

[0092] Intelligent adaptation

[0093] It can be adapted to different zeolite types such as 3A and 13X to meet the disinfection needs of various scenarios such as food and medical.

[0094] Industry Value

[0095] This equipment solves the pain points of traditional gas-fired hot air sterilization equipment, such as high energy consumption, poor humidity control, and frequent maintenance, through the cascade utilization of thermal energy and dynamic switching technology of adsorption-regeneration. It is suitable for food processing, medical devices, laboratory sterilization and other fields, and promotes the green and intelligent upgrading of high-temperature sterilization processes.

[0096] 1. Intelligent and efficient zeolite adsorption-regeneration system

[0097] Dynamic switching, continuous operation

[0098] The filter box 6 is equipped with a filter chamber 9 and a regeneration chamber 10. The two zeolite placement chambers alternately perform adsorption and regeneration functions by rotating the rotating frame 12 periodically by 180°.

[0099] No downtime required: When one side of the zeolite is saturated, the drive shaft 11 automatically switches to the other side to work with the zeolite, enabling the equipment to run continuously for 24 hours and improving production efficiency by more than 30%.

[0100] Adsorption efficiency optimization

[0101] Elastic compaction seal: Inside the filter chamber 9, the filter screen frame 19 is squeezed by the inner wall of the chamber through the return spring 17, so that the zeolite particles 18 are densely arranged, reducing gas flow around, increasing the adsorption contact area and sealing performance, and increasing the moisture adsorption rate by 20% to 40%.

[0102] Guide slope 21 design: When the rotating frame 12 is switched, the slope of the filter screen frame 19 will first contact the cavity wall to gradually compact the zeolite and avoid air leakage or uneven adsorption caused by loose particles.

[0103] Breakthrough in regeneration efficiency

[0104] Controllable pore regeneration: After switching to regeneration chamber 10, the reset spring 17 releases the pressure, the filter frame 19 moves down to form particle gaps, and the high-temperature gas at 200-350°C penetrates the zeolite layer evenly through the regeneration pipe 13, increasing the desorption rate by 50%.

[0105] Anti-fall protection: A stop rod 20 is set at the bottom of the regeneration chamber 10 to limit the downward movement of the filter screen frame 19 and avoid mechanical wear or airflow short circuit caused by excessive loosening of zeolite particles.

[0106] 2. Cascade utilization of thermal energy and energy conservation and consumption reduction

[0107] Waste heat recovery insulation

[0108] The high-temperature humid air generated by desorption in the regeneration chamber 10 is introduced into the hollow cavity 2 through the circulation pipe 14, directly storing heat and forming an insulation layer, thereby reducing the heat loss of the disinfection chamber 1 by 40% to 60%.

[0109] Rapid heating: Even with the opening and closing of the chamber door for loading and unloading, the residual heat of the hollow cavity 2 can still maintain the basic temperature of the disinfection chamber, such as 80-100℃, reducing reheating energy consumption by more than 50%.

[0110] Combustion chamber thermal energy reuse

[0111] After being adsorbed by zeolite, the dry gas is returned to the combustion chamber for recirculation heating, reducing the need for external air replenishment and improving combustion efficiency by 15% to 20%.

[0112] 3. Precise control of humidity and pressure

[0113] Stable humidity

[0114] Zeolite dynamic adsorption can remove moisture from hot and humid gases in real time, keeping the humidity fluctuation range of the disinfection chamber 1 within ±5%, thus avoiding discoloration or deterioration caused by uneven humidity during hot air disinfection.

[0115] Pressure safety

[0116] The hollow cavity 2 is equipped with a pressure relief channel 8 at the top. When the air pressure exceeds the threshold, it will automatically release air to prevent the equipment from deforming or leaking due to the expansion of high temperature and moisture, thus significantly improving safety.

[0117] 4. Optimization of material lifespan and maintenance costs

[0118] Long-term use of zeolite

[0119] The regeneration temperature is strictly matched to the temperature limit of zeolite molecular sieves (300-350℃) to avoid high-temperature sintering deactivation, and the material cycle life can reach more than 5000 times.

[0120] Anti-pollution design

[0121] The flexible mechanism and sealing structure reduce dust from entering the zeolite layer. Combined with periodic high-temperature desorption, it prevents oil or impurities from clogging the pores, extending the maintenance cycle to 3 to 6 months.

[0122] 5. Operational automation and expanded applicability

[0123] Unattended operation

[0124] The drive shaft 11 can be linked with the PLC control system to automatically switch the zeolite chamber based on humidity sensor data, reducing the need for manual intervention.

[0125] Multi-scenario adaptation

[0126] By replacing zeolites with different pore sizes, such as type 3A and 4A, or adjusting the regeneration temperature, it can be adapted to various hot air sterilization process requirements.

[0127] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A gas-fired hot air circulating disinfection device, comprising a disinfection chamber (1) and a combustion chamber (3) disposed on the side of the disinfection chamber (1), wherein the air outlet of the combustion chamber (3) is connected to the inner cavity of the disinfection chamber (1) through an air outlet pipe (4), and the air inlet of the combustion chamber (3) is connected to the disinfection chamber (1) through an air inlet pipe (5) filtered by a filter assembly, characterized in that: The filter assembly includes a filter box (6) fixed to the side of the disinfection chamber (1); The filter box (6) has a filter chamber (9) and a regeneration chamber (10) on its two sides respectively. The inner cavity of the regeneration chamber (10) is connected to the combustion chamber of the combustion chamber (3) through a regeneration pipe (13). The inner cavity of the filter box (6) is rotatably connected to a rotating frame (12) driven by a drive shaft (11). The two sides of the rotating frame (12) are symmetrically arranged in the inner cavities of the filter chamber (9) and the regeneration chamber (10) respectively. The inner cavity of the rotating frame (12) is divided into two sections by a partition plate (15). Zeolite placement chamber, both zeolite particles (18) are placed in the inner cavity of the two zeolite placement chambers, and filter screen frames (19) are set above and below the two zeolite placement chambers. The upper filter screen frame (19) is fixed in the inner cavity of the zeolite placement chamber, and the lower filter screen frame (19) is slidably connected in the inner cavity of the zeolite placement chamber through an elastic mechanism. The rotating frame (12) located in the inner cavity of the filter chamber (9) is slidably sealed with the inner cavity of the filter chamber (9). The height of the regeneration chamber (10) is twice the height of the filter chamber (9).

2. The gas-fired hot air circulating disinfection device according to claim 1, characterized in that: The inner cavity of the disinfection chamber (1) is provided with a hollow cavity (2).

3. The gas-fired hot air circulating disinfection device according to claim 1, characterized in that: The elastic mechanism includes a fixing frame (16) fixed to the side of the partition plate (15), and a return spring (17) is fixedly connected to the bottom of the fixing frame (16). The bottom end of the return spring (17) is fixedly connected to the surface of the filter screen frame (19).

4. The gas-fired hot air circulating disinfection device according to claim 1, characterized in that: The top of the inner cavity of the regeneration chamber (10) is connected to the inner cavity of the hollow cavity (2) through the circulation pipe (14), and the water-containing high-heat gas desorbed by zeolite is introduced into the hollow cavity (2) through the circulation pipe (14).

5. The gas-fired hot air circulating disinfection device according to claim 1, characterized in that: The top of the disinfection chamber (1) is provided with a pressure relief channel (8) that communicates with the hollow cavity (2).

6. The gas-fired hot air circulating disinfection device according to claim 1, characterized in that: The bottom of the inner cavity of the regeneration chamber (10) is fixedly connected to an abutment rod (20), which supports the filter frame (19) below.

7. The gas-fired hot air circulating disinfection device according to claim 1, characterized in that: The lower outer ring of the filter frame (19) is provided with a guide slope (21) that gradually decreases from the center of the filter frame (19) toward the periphery.

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