A sterilizing and disinfecting ventilator

Abstract

The present invention discloses a sterilizing and disinfecting ventilator, belonging to the field of air disinfection equipment, which solves the technical problem that the existence time of hydroxyl radicals is relatively short and the bactericidal and disinfection effects cannot be fully exerted; it includes a main housing, a reaction chamber housing is arranged inside the main housing, the main housing is provided with a main air inlet, the air inlet of the reaction chamber housing is communicated with the main air inlet, an air inlet fan is installed on the main air inlet, the air outlet of the reaction chamber housing is connected to an air flow mixing mechanism, the main housing is also provided with a secondary air inlet, and a dual-band ultraviolet lamp tube is arranged inside the reaction chamber housing; the hydroxyl radicals initiate a chain reaction, and air is introduced again from the secondary air inlet, and the oxygen in the air participates in the subsequent chain transfer steps, causing the reaction path to change, and some reaction channels that might directly lead to the rapid consumption of hydroxyl radicals are inhibited, thereby enabling the hydroxyl radicals to exist in the system relatively more persistently. This allows the hydroxyl radicals to be effectively released to improve the bactericidal and disinfection effects.

Description

Technical Field

[0001] The present invention relates to the field of air disinfection equipment, and particularly to a sterilizing and disinfecting ventilator. Background Art

[0002] Hydroxyl radical (·OH), as a highly oxidizing reactive oxygen species, has an oxidation ability second only to fluorine and shows great application potential in the field of sterilization and disinfection. In many scenarios such as air purification and object surface disinfection, the use of hydroxyl radicals can effectively decompose the cell walls, cell membranes and internal biological macromolecules (such as nucleic acids, proteins, etc.) of microorganisms, thereby destroying the structural integrity of microorganisms and causing them to lose their activity, achieving the purpose of sterilization and disinfection. However, the chemical properties of hydroxyl radicals are extremely active, and it can react rapidly with almost any substance in the surrounding environment. In the atmospheric environment, it usually only exists for a microsecond level of time. This means that in actual sterilization and disinfection scenarios, once hydroxyl radicals are generated, they often have not had time to fully contact the target microorganisms and fully exert their oxidation effect before being consumed by other non-target substances (such as organic and inorganic substances in the environment), resulting in a significant reduction in the actual disinfection efficiency of microorganisms and being unable to achieve an efficient and thorough disinfection effect. In existing air purification equipment, the methods for realizing the mixing of two gases are mostly relatively simple and crude. For example, commonly, two gas sources are connected through a simple tee pipe, and the gases are allowed to naturally converge and mix in the pipe. However, due to differences in the gas source pressures, gas flow rates and the diffusion characteristics of the gases themselves, it is very difficult to ensure that the gases can reach a uniform mixing state before entering the purification area or being discharged from the equipment. Summary of the Invention

[0003] The present invention provides a sterilizing and disinfecting ventilator to solve the technical problem that the existence time of hydroxyl radicals is relatively short and they cannot fully exert their sterilizing and disinfecting effects.

[0004] The technical solution of the present invention is: a sterilizing and disinfecting ventilator, including a main housing. A reaction chamber housing is provided inside the main housing. A main air inlet is provided on the main housing. The air inlet of the reaction chamber housing is in communication with the main air inlet. An air inlet fan is installed on the main air inlet. The air outlet of the reaction chamber housing is connected to an air flow mixing mechanism. A secondary air inlet communicating with the air flow mixing mechanism is also provided on the main housing. A dual-band ultraviolet lamp tube is provided inside the reaction chamber housing. The air outlet end of the air flow mixing mechanism is connected to an air pump. The air flow mixing mechanism includes a mixing chamber provided inside the main housing. A first baffle and a second baffle are fixedly installed inside the mixing chamber. The air inlet end of the mixing chamber is in communication with both the air outlet of the reaction chamber housing and the secondary air inlet. A plurality of longitudinal holes are provided on the first baffle. A plurality of transverse holes are provided on the second baffle. Or, the air flow mixing mechanism includes an annular housing provided inside the main housing. An outer annular body is sleeved on the outer peripheral surface of the annular housing. An annular cavity is formed between the outer annular body and the annular housing. The air outlet of the reaction chamber housing is connected to the annular cavity. An induced draft fan is installed at the air inlet end of the annular housing. An air outlet is provided at the air outlet end of the annular housing. An exhaust pipe communicating with the annular cavity is provided on the inner wall of the annular housing. The exhaust pipe is located between the induced draft fan and the air outlet. A deflector is provided between the exhaust pipe and the air outlet. The deflector is spindle-shaped.

[0005] As a preferred technical solution, an adjusting mechanism for adjusting the size of the transverse holes is further provided on the second baffle. The adjusting mechanism includes a lifting plate movably installed up and down inside the mixing chamber. Through holes corresponding one by one to the transverse holes on the second baffle are provided on the lifting plate. The plate body of the lifting plate between adjacent through holes also serves as a blocking portion. The adjusting mechanism further includes a lifting driving mechanism for driving the lifting plate to move up and down.

[0006] As a preferred technical solution, the reaction chamber housing is cylindrical. The dual-band ultraviolet lamp tube is sleeved inside the reaction chamber housing. A plurality of flow guiding rings are provided between the dual-band ultraviolet lamp tube and the reaction chamber housing. The axis of the flow guiding ring coincides with the axis of the dual-band ultraviolet lamp tube. Flow guiding holes extending forward and backward are provided on the flow guiding ring.

[0007] As a preferred technical solution, a first flow guiding groove and a second flow guiding groove are provided on the inner wall of the reaction chamber housing between adjacent flow guiding rings. The depth of the first flow guiding groove gradually increases from back to front. The depth of the second flow guiding groove gradually decreases from back to front.

[0008] As a preferred technical solution, a flow guide member is further installed on the inner wall of the annular housing. The flow guide member extends along the diameter direction of the annular housing. The flow guide member is located between the exhaust pipe and the fluid guide. The flow guide member includes a columnar body. The columnar body is rotatably installed on the inner wall of the annular housing and the inner cavity of the columnar body communicates with the annular cavity. Baffles are fixedly installed on the left and right sides of the columnar body. A flow guide air outlet is formed on the front surface of the columnar body. A rotary drive mechanism for driving the columnar body to rotate is installed in the annular housing.

[0009] As a preferred technical solution, the baffle of one flow guide member among two adjacent flow guide members extends along the axis direction of the annular housing, and the baffle of the other flow guide member extends perpendicular to the axis direction of the annular housing.

[0010] As a preferred technical solution, an installation sleeve is fixedly installed on the rotating shaft of the induced draft fan. A rotating shaft is rotatably installed on the installation sleeve. The axis of the rotating shaft is perpendicular to the axis of the installation sleeve. The inner end of a swing rod is fixedly installed on the rotating shaft. A counterweight is fixedly installed at the outer end of the swing rod. An elastic membrane is provided between adjacent swing rods; a driving gear is coaxially and fixedly installed on the rotating shaft. A movable shaft is sleeved in the installation sleeve. The movable shaft and the installation sleeve are in clearance fit. A rack extending along the axis direction of the movable shaft is fixedly installed on the outer peripheral surface of the movable shaft. A strip-shaped hole is provided on the barrel wall of the installation sleeve. The driving gear is located in the strip-shaped hole and meshes with the rack. The front end of the movable shaft abuts against the rear end of the fluid guide. A fluid guide column is fixedly installed in the annular housing. A fluid guide hole for the fluid guide column to penetrate into is provided at the front end of the fluid guide. A support spring for pushing the fluid guide backward is provided between the fluid guide column and the fluid guide.

[0011] As a preferred technical solution, the air pump is detachably connected with an air outlet pipe, and a valve is installed at the end of the air outlet pipe.

[0012] Due to the adoption of the above technical solution, a sterilizing and disinfecting ventilator includes a main housing. A reaction chamber housing is provided inside the main housing. A main air inlet is provided on the main housing. The air inlet of the reaction chamber housing is in communication with the main air inlet. An air inlet fan is installed on the main air inlet. The air outlet of the reaction chamber housing is connected to an air flow mixing mechanism. A secondary air inlet communicating with the air flow mixing mechanism is also provided on the main housing. A dual-band ultraviolet lamp tube is provided inside the reaction chamber housing. The air outlet end of the air flow mixing mechanism is connected to an air pump. The dual-band ultraviolet lamp tube can generate UVD and UVC ultraviolet rays simultaneously. Oxygen in the air entering the reaction chamber housing from the main air inlet generates ozone under the action of UVD ultraviolet rays. UVC ultraviolet rays act on the ozone to catalyze the decomposition of the ozone. After the ozone absorbs the energy of photons, it decomposes, and the decomposed product has a stronger oxidation ability. The decomposed product of the ozone reacts with water molecules in the air to generate hydroxyl radicals. Air is introduced again from the secondary air inlet. Since hydroxyl radicals can initiate a chain reaction, oxygen in the air can participate in the subsequent chain transfer steps, changing the reaction path. Some reaction channels that might directly lead to the rapid consumption of hydroxyl radicals are inhibited, and instead, the reaction process is gradually advanced by synergistically acting with oxygen, enabling hydroxyl radicals to exist relatively more persistently in the system. This allows the hydroxyl radicals to be effectively released to improve the sterilization and disinfection effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural diagram of Embodiment 1 of the present invention;

[0014] Figure 2 is a schematic structural diagram of the first baffle in Embodiment 1 of the present invention;

[0015] Figure 3 is a schematic structural diagram of the second baffle in Embodiment 1 of the present invention;

[0016] Figure 4 is a schematic structural diagram of the lifting plate in Embodiment 1 of the present invention;

[0017] Figure 5 is a schematic diagram of the descending state of the lifting plate in Embodiment 1 of the present invention;

[0018] Figure 6 is a schematic structural diagram of Embodiment 2 of the present invention;

[0019] Figure 7 is a schematic structural diagram of the first diversion groove and the second diversion groove in Embodiment 2 of the present invention.

[0020] Figure 8 is a schematic structural diagram of Embodiment 3 of the present invention;

[0021] Figure 9It is a schematic structural diagram of the flow guide member in the third embodiment of the present invention;

[0022] Figure 10 It is a schematic structural diagram of the fourth embodiment of the present invention;

[0023] Figure 11 It is Figure 10 a partial enlarged view of I in

[0024] Figure 12 It is a schematic diagram of the tension state of the elastic membrane in the fourth embodiment of the present invention.

[0025] In the figure: 1, main housing; 2, reaction chamber housing; 3, main air inlet; 4, auxiliary air inlet; 5, dual-band ultraviolet lamp tube; 6, air pump; 7, mixing chamber; 8, first baffle; 9, second baffle; 10, longitudinal hole; 11, transverse hole; 12, lifting plate; 13, through hole; 14, annular housing; 15, outer annular body; 16, annular cavity; 17, induced draft fan; 18, air outlet; 19, exhaust pipe; 20, flow guide member; 21, flow guide body; 22, columnar body; 23, baffle; 24, flow guide air outlet; 25, driving bevel gear; 26, rotating shaft; 27, flow guide ring; 28, inner flow guide hole; 29, outer flow guide hole; 30, first flow guide groove; 31, second flow guide groove; 32, eccentric wheel; 33, air vent; 34, driven bevel gear; 35, mounting sleeve; 36, rotating shaft; 37, swing rod; 38, counterweight; 39, driving gear; 40, movable shaft; 41, rack; 42, strip-shaped hole; 43, flow guide body guide post; 44, elastic membrane; 45, horn-shaped housing. Specific embodiments Embodiment

[0026] As Figures 1 to 5As shown, a sterilizing ventilator includes a main housing 1. A reaction chamber housing 2 is provided inside the main housing 1. A main air inlet 3 is provided on the main housing 1. The air inlet of the reaction chamber housing 2 is in communication with the main air inlet 3. An air inlet fan is installed on the main air inlet 3. The air outlet of the reaction chamber housing 2 is connected to an air flow mixing mechanism. A secondary air inlet 4 communicating with the air flow mixing mechanism is also provided on the main housing 1. A dual-band ultraviolet lamp 5 is provided inside the reaction chamber housing 2. The air outlet end of the air flow mixing mechanism is connected to an air pump 6. Hydroxyl radicals can initiate a chain reaction. Air is introduced from the secondary air inlet 4, and oxygen in the air can participate in the subsequent chain transfer steps, causing the reaction path to change. Some reaction channels that might directly lead to the rapid consumption of hydroxyl radicals are inhibited, and instead, the reaction process is gradually promoted by cooperating with oxygen, enabling hydroxyl radicals to exist in the system relatively more persistently. This allows hydroxyl radicals to be effectively released to improve the sterilization and disinfection effects. The dual-band ultraviolet lamp 5 can simultaneously generate UVD and UVC ultraviolet rays. Oxygen in the air entering the reaction chamber housing 2 from the main air inlet 3 generates ozone under the action of UVD ultraviolet rays. Subsequently, UVC ultraviolet rays act on the ozone to catalyze the decomposition of the ozone. The ozone decomposes after absorbing the energy of photons, and the decomposed products have stronger oxidation ability. The decomposed products of the ozone react with water molecules in the air to generate hydroxyl radicals. The hydroxyl radicals are discharged by the air pump 6 and act on the air to decompose organic compounds harmful to the human body, as well as various known bacteria, viruses, etc.

[0027] As Figure 1 shown, the air flow mixing mechanism includes a mixing chamber 7 provided inside the main housing 1. A first baffle 8 and a second baffle 9 are fixedly installed inside the mixing chamber 7. The air inlet end of the mixing chamber 7 is in communication with the air outlet of the reaction chamber housing 2 and the secondary air inlet 4. A plurality of longitudinal holes 10 are provided on the first baffle 8, and a plurality of transverse holes 11 are provided on the second baffle 9. An air outlet hole 33 communicating with the air outlet end of the air flow mixing mechanism is also provided on the main housing 1. The air inlet end of the air pump 6 is also in communication with the end of the mixing chamber 7. A discharge pipe is detachably installed at the air outlet end of the air pump 6. The air flow discharged from the air outlet of the reaction chamber housing 2 and the air entering from the secondary air inlet 4 are fully mixed in the air flow mixing mechanism, enabling oxygen in the air to fully participate in the subsequent chain transfer steps, causing the reaction path to change. Some reaction channels that might directly lead to the rapid consumption of hydroxyl radicals are inhibited, and instead, the reaction process is gradually promoted by cooperating with oxygen. The gas in the mixing chamber 7 can be released from the air outlet end of the air pump 6 or directly through the air outlet hole 33.

[0028] As Figures 2 to 5As shown, an adjusting mechanism for adjusting the size of the transverse holes 11 is further provided on the second baffle 9. The adjusting mechanism includes a lifting plate 12 movably mounted up and down in the mixing chamber 7. Through holes 13 corresponding to the transverse holes 11 on the second baffle 9 are formed in the lifting plate 12. The plate body of the lifting plate 12 between adjacent through holes 13 also serves as a blocking portion. The adjusting mechanism further includes a lifting driving mechanism for driving the lifting plate 12 to move up and down. The size of the transverse holes 11 can be adjusted by the adjusting mechanism, so that the size of the mesh holes can be adjusted as needed. For example, increasing the size of the transverse holes 11 can allow the gas to enter the subsequent mixing space in a more dispersed state. If the size of the transverse holes 11 is reduced, the flow rate of the gas passing through the transverse holes will decrease, and the residence time of the gas molecules will be relatively prolonged, which provides more time conditions for the gas to make full contact and preliminary mixing near the transverse holes 11. The lifting driving mechanism includes a motor fixedly installed in the mixing chamber 7. An eccentric wheel 32 is fixedly installed on the output shaft of the motor. The eccentric wheel supports the lower end of the lifting plate 12. A return spring is provided between the lifting plate 12 and the chamber wall of the mixing chamber 7. The air pump 6 is detachably connected to an air outlet pipe, and a valve is installed at the end of the air outlet pipe. By controlling the opening degree of the valve, the air output of the air outlet pipe can be controlled. When the opening degree of the valve is small, the gas carrying hydroxyl radicals conveyed by the air pump 6 can act on the pipe wall of the air outlet pipe for a long time, so that the pipeline of the air outlet pipe can be sterilized and disinfected. A mask or the like can be installed at the end of the air outlet pipe. Embodiment

[0029] The structure of Embodiment 2 is basically the same as that of Embodiment 1, the difference being that:

[0030] As Figures 6 to 7 shown, the air flow mixing mechanism includes an annular housing 14 provided in the main housing 1. An outer annular body 15 is sleeved on the outer peripheral surface of the annular housing 14. An annular chamber 16 is formed between the outer annular body 15 and the annular housing 14. The air outlet of the reaction chamber housing 2 is connected to the annular chamber 16. An induced draft fan 17 is installed at the air inlet end of the annular housing 14. An air outlet 18 is provided at the air outlet end of the annular housing 14. An exhaust pipe 19 communicating with the annular chamber 16 is provided on the inner wall of the annular housing 14. The exhaust pipe 19 is located between the induced draft fan 17 and the air outlet 18. As Figure 6As shown, a fluid guide 21 is provided between the exhaust pipe 19 and the air outlet 18, and the fluid guide 21 is spindle-shaped. Preferably, the annular housing 14 includes a horn-shaped housing 45 at the front, and the air outlet 18 is provided at the small end of the horn-shaped housing 45. The flow field characteristics around the spindle-shaped fluid guide 21 cause complex vortexes, secondary flows, etc. to occur when the gas flows through it. These flow characteristics can accelerate the diffusion and mutual exchange between gas molecules. Compared with relying solely on the self-diffusion of the gas to mix without the fluid guide 21, a better mixing effect can be achieved in a shorter time, improving the mixing efficiency.

[0031] As Figure 6 and Figure 7 shown, the reaction chamber housing 2 is cylindrical, the dual-band ultraviolet lamp tube 5 is sleeved inside the reaction chamber housing 2, and a plurality of flow guide rings 27 are provided between the dual-band ultraviolet lamp tube 5 and the reaction chamber housing 2. The axis of the flow guide ring 27 coincides with the axis of the dual-band ultraviolet lamp tube 5. The flow guide ring 27 is provided with flow guide holes extending in the front and rear directions. The flow guide holes include a plurality of inner flow guide holes 28 and outer flow guide holes 29. The front end of the inner flow guide hole 28 is parallel to the dual-band ultraviolet lamp tube 5, the rear end of the inner flow guide hole 28 extends toward the inner wall of the reaction chamber housing 2, the front end of the outer flow guide hole 29 extends toward the inner wall of the reaction chamber housing 2, and the rear end of the outer flow guide hole 29 is parallel to the dual-band ultraviolet lamp tube 5. The front end of the inner flow guide hole 28 being parallel to the dual-band ultraviolet lamp tube 5 means that the axis of the front end of the inner flow guide hole 28 is parallel to the axis of the dual-band ultraviolet lamp tube 5, and the rear end of the outer flow guide hole 29 being parallel to the dual-band ultraviolet lamp tube 5 means that the axis of the rear end of the outer flow guide hole 29 is parallel to the axis of the dual-band ultraviolet lamp tube 5. As Figure 7 shown, the inner wall of the reaction chamber housing 2 is provided with a first flow guide groove 30 and a second flow guide groove 31 between adjacent flow guide rings 27. The depth of the first flow guide groove 30 gradually increases from the rear to the front, and the depth of the second flow guide groove 31 gradually decreases from the rear to the front. The above front and rear directions are relative to the air flow direction. The front is the downstream direction of the air flow direction, enabling the air flow to move along the first flow guide groove 30 and the second flow guide groove 31, and promoting the flow of the air flow between the first flow guide groove 30 and the second flow guide groove 31, making the reaction more sufficient and improving the efficiency of generating hydroxyl radicals.

[0032] Embodiment 3: Embodiment 3 is basically the same as Embodiment 2, the difference being that: As Figure 8 and Figure 9As shown, a flow guiding member 20 is further installed on the inner wall of the annular housing 14. The flow guiding member 20 extends along the diameter direction of the annular housing 14, and the flow guiding member 20 is located between the exhaust pipe 19 and the fluid guiding body 21.

[0033] The flow guiding member 20 includes a columnar body 22. The columnar body 22 is rotatably installed on the inner wall of the annular housing 14, and the inner cavity of the columnar body 22 communicates with the annular cavity 16. Baffles 23 are fixedly installed on the left and right sides of the columnar body 22. A flow guiding air outlet 24 is formed on the front surface of the columnar body 22. A rotary driving mechanism for driving the columnar body 22 to rotate is installed in the annular housing 14. The rotation of the columnar body can cause the flow guiding air outlet 24 to rotate, thereby changing the air outlet direction and further improving the mixing efficiency.

[0034] Among two adjacent flow guiding members 20, the baffle 23 of one flow guiding member extends along the axial direction of the annular housing 14, and the baffle 23 of the other flow guiding member extends perpendicular to the axial direction of the annular housing 14. The different directions of the baffles 23 of adjacent flow guiding members enable the air flows to fully collide and mix with each other, prompting more opportunities for contact between gas molecules, thereby accelerating the mixing process and improving the mixing efficiency.

[0035] As Figure 9 shown, the rotary driving mechanism includes a driven bevel gear 34 fixedly installed at the inner end of the columnar body 22, and a driving bevel gear 25 that is fixedly installed on the rotating shaft 26 of the induced draft fan 17 and meshes with the driven bevel gear 34. The rotating shaft of the induced draft fan 17 rotates, thereby driving the driving bevel gear 25 to rotate, and further driving the driven bevel gear 34 to rotate, so that the columnar body 22 rotates.

[0036] Embodiment 4: Embodiment 4 is basically the same as Embodiment 2, except that: As Figures 10 to 12 shown, an installation sleeve 35 is fixedly installed on the rotating shaft of the induced draft fan 17. A rotating shaft 36 is rotatably installed on the installation sleeve 35. The axis of the rotating shaft 36 is perpendicular to the axis of the installation sleeve 35. The inner end of a swing rod 37 is fixedly installed on the rotating shaft 36, and a counterweight 38 is fixedly installed at the outer end of the swing rod 37. An elastic film 44 is provided between adjacent swing rods 37.

[0037] A driving gear 39 is coaxially fixedly mounted on the rotating shaft 36, and the axis of the driving gear 39 coincides with the axis of the rotating shaft 36. A movable shaft 40 is sleeved in the mounting sleeve 35, and the movable shaft 40 and the mounting sleeve 35 are clearance-fitted. A rack 41 extending along the axial direction of the movable shaft 40 is fixedly mounted on the outer circumference of the movable shaft 40, and a strip hole 42 is provided on the cylindrical wall of the mounting sleeve 35. The driving gear 39 is located in the strip hole 42 and meshes with the rack 41. The front end of the movable shaft 40 is pressed against the rear end of the guide body 21, and a guide body guide column 43 is fixedly mounted in the annular housing 14. The front end of the guide body 21 is provided with a guide body guide hole for the guide body guide column to penetrate, and a support spring for pushing the guide body 21 backward is provided between the guide body guide column 43 and the guide body 21. The front-to-back direction is relative to the direction of airflow movement, and the direction downstream of the airflow movement direction is the front. When the induced fan rotates at a high speed, since the counterweight 38 is fixedly installed on the outer end of the swing arm 37, the swing arm 37 will swing outward under the action of centrifugal force, which will cause the elastic membrane 44 provided between the adjacent swing arms 37 to open, thereby guiding the airflow to move toward the inner wall of the annular shell 14, thereby accelerating the mixing of the airflow. In addition, the swinging of the swing arm 37 will also drive the driving gear 39 to rotate, thereby causing the rack 41 to move, thereby causing the movable shaft 40 to move, thereby causing the guide body 21 to move relative to the guide body guide column 43, thereby changing the position of the guide body 21, so that the guide body 21 can move toward the direction of the air outlet 18, thereby causing the airflow to form more complex and more intense vortexes and turbulence, making the mutual interweaving and blending between the two airflows more intense, which can effectively improve the uniformity of mixing and enable each part of the airflow to deeply participate in the mixing process.

[0038] The above shows and describes the basic principles, main features and advantages of the present invention. Without departing from the spirit and scope of the present invention, the present invention may also have various changes and improvements, which fall within the scope of the present invention.

Claims

1. A sterilizing and disinfecting ventilator, characterized in that: It includes a main housing (1), a reaction chamber housing (2) is provided inside the main housing (1), a main air inlet (3) is provided on the main housing (1), the air inlet of the reaction chamber housing (2) is in communication with the main air inlet (3), an air inlet fan is installed on the main air inlet (3), the air outlet of the reaction chamber housing (2) is connected to an air flow mixing mechanism, a secondary air inlet (4) in communication with the air flow mixing mechanism is further provided on the main housing (1), a dual-band ultraviolet lamp tube (5) is provided inside the reaction chamber housing (2), and an air pump (6) is connected to the air outlet end of the air flow mixing mechanism; the air flow mixing mechanism includes an annular housing (14) provided inside the main housing (1), an outer annular body (15) is sleeved on the outer peripheral surface of the annular housing (14), an annular cavity (16) is formed between the outer annular body (15) and the annular housing (14), the air outlet of the reaction chamber housing (2) is connected to the annular cavity (16), an induced draft fan (17) is installed at the air inlet end of the annular housing (14), an air outlet (18) is provided at the air outlet end of the annular housing (14), an exhaust pipe (19) in communication with the annular cavity (16) is provided on the inner wall of the annular housing (14), the exhaust pipe (19) is located between the induced draft fan (17) and the air outlet (18), and a fluid guide (21) is provided between the exhaust pipe (19) and the air outlet (18), and the fluid guide (21) is spindle-shaped; the reaction chamber housing (2) is cylindrical, the dual-band ultraviolet lamp tube (5) is sleeved inside the reaction chamber housing (2), a plurality of flow guide rings (27) are provided between the dual-band ultraviolet lamp tube (5) and the reaction chamber housing (2), the axis of the flow guide ring (27) coincides with the axis of the dual-band ultraviolet lamp tube (5), and flow guide holes extending forward and backward are provided on the flow guide ring (27); first flow guide grooves (30) and second flow guide grooves (31) located between adjacent flow guide rings (27) are provided on the inner wall of the reaction chamber housing (2), the depth of the first flow guide groove (30) gradually increases from back to front, and the depth of the second flow guide groove (31) gradually decreases from back to front; an installation sleeve (35) is fixedly installed on the rotating shaft of the induced draft fan (17), a rotating shaft (36) is rotatably installed on the installation sleeve (35), the axis of the rotating shaft (36) is perpendicular to the axis of the installation sleeve (35), the inner end of a swing rod (37) is fixedly installed on the rotating shaft (36), a counterweight (38) is fixedly installed at the outer end of the swing rod (37), and an elastic film is provided between adjacent swing rods (37);A driving gear (39) is coaxially and fixedly mounted on the rotating shaft (36). A movable shaft (40) is sleeved in the mounting sleeve (35). The movable shaft (40) and the mounting sleeve (35) are in clearance fit. A rack (41) extending along the axial direction of the movable shaft (40) is fixedly mounted on the outer peripheral surface of the movable shaft (40). A strip-shaped hole (42) is provided in the barrel wall of the mounting sleeve (35). The driving gear (39) is located in the strip-shaped hole (42) and meshes with the rack (41). The front end of the movable shaft (40) abuts against the rear end of the fluid guide (21). A fluid guide column (43) is fixedly mounted in the annular housing (14). A fluid guide hole for the fluid guide column (43) to penetrate into is provided at the front end of the fluid guide (21). A support spring for pushing the fluid guide (21) backward is provided between the fluid guide column (43) and the fluid guide (21). The annular housing (14) includes a horn-shaped housing (45) at the front part. The small end of the horn-shaped housing (45) is provided with the air outlet (18).; 2. The sterilizing and disinfecting ventilator according to claim 1, wherein: A flow guide member (20) is further installed on the inner wall of the annular housing (14). The flow guide member (20) extends along the diameter direction of the annular housing (14). The flow guide member (20) is located between the exhaust pipe (19) and the flow guide body (21). The flow guide member (20) includes a columnar body (22). The columnar body (22) is rotatably installed on the inner wall of the annular housing (14), and the inner cavity of the columnar body (22) is in communication with the annular cavity (16). Baffles (23) are fixedly installed on the left and right sides of the columnar body (22). A flow guide air outlet (24) is formed on the front surface of the columnar body (22). A rotary drive mechanism for driving the columnar body (22) to rotate is installed in the annular housing (14).

3. The sterilizing and disinfecting ventilator according to claim 2, wherein: Among two adjacent flow guide members (20), the baffle (23) of one flow guide member extends along the axial direction of the annular housing (14), and the baffle (23) of the other flow guide member extends perpendicular to the axial direction of the annular housing (14).

4. The sterilizing and disinfecting ventilator according to claim 1, characterized in that: The air pump (6) is detachably connected to an air outlet pipe, and a valve is installed at the end of the air outlet pipe.

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