Central air conditioning air pipe disinfection device and disinfection method

Abstract

The application discloses a central air conditioner air pipe disinfection device and disinfection method, and belongs to the technical field of central air conditioner air pipe disinfection, which comprises: sequentially connected air inlet pipeline, disinfection buffer pipeline and air outlet pipeline; a filter adsorption unit is detachably arranged at the air inlet of the air inlet pipeline; a disinfection unit and an air flow buffer unit are sequentially arranged in the disinfection buffer pipeline along the flow direction of air; a rotating plate is arranged at the air outlet of the air outlet pipeline; and the rotating plate is in damping rotary connection with the inner wall of the air outlet pipeline, so as to adjust the air outlet size at the air outlet of the air outlet pipeline. The central air conditioner air pipe disinfection device and disinfection method are convenient to use, can treat the particulate pollutants and toxic air pollutants in air, and can purify and disinfect the air.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of central air conditioning air pipe disinfection, and particularly relates to a central air conditioning air pipe disinfection device and a disinfection method. BACKGROUND

[0002] A central air conditioning system is composed of one or more cold and heat source systems and multiple air conditioning systems, and is different from a traditional refrigerant type air conditioner in that air is centrally processed to meet comfort requirements. The principle of liquid gasification refrigeration is used to provide the required cold quantity for the air conditioning system to offset the cold load of the indoor environment; the heating system provides the required heat for the air conditioning system to offset the heat load of the indoor environment, and the central air conditioning system is composed of many parts.

[0003] At present, the central air conditioning and its pipeline only have air supply function, and the air pipe of the existing central air conditioning can only simply filter dust, and cannot disinfect air, so that toxic substances can enter the indoor environment along the air pipe during use of the central air conditioning, thereby endangering human health. SUMMARY

[0004] In order to solve the above problems, the application provides a central air conditioning air pipe disinfection device and a disinfection method, which adopts the following technical scheme:

[0005] A central air conditioning air pipe disinfection device and a disinfection method, comprising: an air inlet pipeline, a disinfection buffer pipeline and an air outlet pipeline connected in sequence;

[0006] A filter adsorption unit is detachably arranged at the air inlet of the air inlet pipeline;

[0007] A disinfection unit and an air flow buffer unit are arranged in sequence in the disinfection buffer pipeline along the flow direction of air;

[0008] A rotating plate is arranged at the air outlet of the air outlet pipeline; the rotating plate is in damping rotary connection with the inner wall of the air outlet pipeline to adjust the air outlet size at the air outlet of the air outlet pipeline.

[0009] Further, the filter adsorption unit comprises a filter layer and an adsorption layer; the adsorption layer is arranged at one end away from the air inlet and is detachably connected with the pipe wall of the air inlet pipeline; the filter layer is arranged at one end close to the air inlet and is detachably connected with the pipe wall of the air inlet pipeline.

[0010] Further, an air guide fan is arranged between the adsorption layer and the disinfection buffer pipeline.

[0011] Further, a plurality of first baffles and a plurality of second baffles are arranged on the disinfection buffer pipe near one end of the air inlet pipe; the plurality of first baffles and the plurality of second baffles are arranged alternately to form a disinfection buffer channel; a light transmission hole is arranged on the disinfection buffer pipe between two adjacent first baffles and second baffles.

[0012] Further, the disinfection unit comprises a disinfection shell; the disinfection shell is sleeved on the disinfection buffer pipe near one end of the air inlet pipe and communicates with the light transmission hole; a plurality of first ultraviolet lamps are detachably connected in the disinfection shell to disinfect the air in the disinfection buffer pipe.

[0013] Further, the disinfection unit further comprises two groups of photocatalytic disinfection pipe groups; the two groups of photocatalytic disinfection pipe groups are respectively set as a first photocatalytic disinfection pipe group and a second photocatalytic disinfection pipe group; the first photocatalytic disinfection pipe group is arranged near one end of the air inlet pipe; the second photocatalytic disinfection pipe group is arranged away from one end of the air inlet pipe; a second ultraviolet lamp is arranged between the first photocatalytic disinfection pipe group and the second photocatalytic disinfection pipe group; the second ultraviolet lamp is arranged radially in the disinfection buffer pipe.

[0014] The photocatalytic disinfection pipe group comprises a plurality of photocatalytic disinfection pipes; a layer of photo-semiconductor material is applied to the inner wall of the photocatalytic disinfection pipe; the photocatalytic disinfection pipe has a regular hexagonal structure; the plurality of photocatalytic disinfection pipes are connected to form a honeycomb-shaped photocatalytic disinfection pipe group.

[0015] Further, the airflow buffer unit comprises an airflow buffer plate; the airflow buffer plate has a conical structure; the airflow buffer plate is arranged axially in the disinfection buffer pipe; the large opening end of the airflow buffer plate is detachably connected to one end of the disinfection buffer pipe near the air inlet pipe; a plurality of airflow holes are arranged on the sidewall of the airflow buffer plate.

[0016] Further, a filter screen is detachably arranged on the inner wall of the airflow buffer plate.

[0017] Further, a spiral baffle is detachably arranged in the air outlet pipe; the spiral baffle is arranged above the rotating plate.

[0018] Further, a disinfection method of a central air conditioning air pipe, which is a disinfection method of the central air conditioning air pipe disinfection device of any one of the above, comprises the following steps:

[0019] Step one, air enters from the air inlet pipe, passes through the filter layer and the adsorption layer in sequence to filter and adsorb the air, and the air inlet fan in the air inlet pipe accelerates the speed of air entering the air inlet pipe;

[0020] Step two, air enters the disinfection pipeline, and is sterilized by the irradiation of the first ultraviolet lamp. Meanwhile, the first baffle and the second baffle prolong the residence time of the air in the irradiation area of the first ultraviolet lamp, so that the air is fully sterilized.

[0021] Step three, the air after the first sterilization flows into the honeycomb-shaped photocatalytic disinfection tube group, and is sterilized for the second time under the irradiation of the second ultraviolet lamp. The photocatalytic reaction is generated in the inner wall of the photocatalytic disinfection tube under the action of the second ultraviolet lamp, so that the air is sterilized for the second time.

[0022] Step four, the sterilized air enters the air flow buffer plate, flows out from the air flow holes on the air flow buffer plate, buffers the air to be discharged into the air outlet pipeline, filters the particulate pollutants in the air, adsorbs the harmful gases in the air, and filters the sterilized air again through the filter screen on the air flow buffer plate.

[0023] Step five, the air enters the air outlet pipeline, and flows out from the air outlet after entering the spiral baffle. Meanwhile, the air outlet of the air outlet pipeline is provided with a rotating plate. When the air flows out, the rotating plate is rotated under the action of the air. The rotating rotating plate adjusts the air outlet angle and the air outlet size. When the air flow rate is fast, the rotating plate rotates fast. When the air flow rate is slow, the rotating plate rotates slowly.

[0024] Advantages:

[0025] (1) The central air conditioner air pipe disinfection device and disinfection method provided by the device can filter and disinfect the air entering the central air conditioner air pipe. The filter layer and the adsorption layer at the air inlet filter the particulate pollutants in the air and adsorb the harmful gases in the air. The air is disinfected twice in the disinfection buffer unit, and the residence time of the air in the ultraviolet irradiation disinfection area is prolonged by the first baffle and the second baffle. The contact area between the air and the photo semiconductor material is increased by the honeycomb-shaped photocatalytic disinfection tube group, which enhances the disinfection effect and improves the disinfection efficiency.

[0026] (2) The width of the spiral baffle plate is less than the radius. The straight-line flow of part of the air is changed into spiral flow by the spiral baffle. The flow rate of this part of the air is accelerated, and the other part of the air passes through the center of the air outlet pipeline to prevent dust from accumulating or adhering to the inner wall of the air outlet pipeline.

[0027] (3) The rotating plate changes the air outlet angle of the air outlet. When the air flow rate is fast, the rotating plate rotates fast. When the air flow rate is slow, the rotating plate rotates slowly. BRIEF DESCRIPTION OF DRAWINGS

[0028] Fig. 1 It is the overall structure schematic view of the central air conditioning air pipe disinfection device of the present application;

[0029] Fig. 2 It is the sectional view of the rotating plate of the central air conditioning air pipe disinfection device of the present application;

[0030] Fig. 3 It is the overall structure schematic view of the photocatalytic disinfection group of the central air conditioning air pipe disinfection device of the present application;

[0031] Among them, 1, the air inlet pipe; 2, disinfection buffer pipe; 3, air outlet pipe; 4, rotating plate; 5, filter layer; 6, adsorption layer; 7, air blower; 8, first baffle; 9, second baffle; 10, disinfection shell; 11, first ultraviolet lamp; 12, air flow buffer plate; 13, air flow hole; 14, spiral baffle; 15, first photocatalytic disinfection pipe group; 16, second photocatalytic disinfection pipe group; 17, second ultraviolet lamp; 18, light transmission hole. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0033] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "top", "bottom", "in", "out" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the present application.

[0034] Example 1

[0035] Reference Figs. 1 to 3 A central air conditioning air pipe disinfection device, comprising: air inlet pipe 1, disinfection buffer pipe 2 and air outlet pipe 3 connected in sequence;

[0036] The air inlet of the air inlet pipe 1 is detachably provided with a filter and adsorption unit;

[0037] The disinfection buffer pipe 2 is provided with a disinfection unit and an air flow buffer unit in sequence along the flow direction of the air;

[0038] The air outlet of the air outlet pipeline 3 is provided with a rotating plate 4; the rotating plate 4 is in damping rotation connection with the air outlet pipeline 3, so as to adjust the air outlet size at the air outlet of the air outlet pipeline 3.

[0039] Through the above technical solution, without the action of the motor, the rotating plate 4 can rotate by 360 degrees, the rotating plate 4 changes the air outlet angle and the air outlet size of the air outlet, when the air outflow speed is fast, the rotating speed of the rotating plate 4 is fast; when the air outflow speed is slow, the rotating speed of the rotating plate 4 is slow; the disinfection buffer pipeline 2 is in an assembled structure of multiple pipelines, which facilitates the disassembly of the disinfection buffer pipeline 2 and the assembly and disassembly of the internal components.

[0040] In the present example, the filter adsorption unit includes a filter layer 5 and an adsorption layer 6; the adsorption layer 6 is arranged at one end away from the air inlet, and is in detachable connection with the pipe wall of the air inlet pipeline 1; the filter layer 5 is arranged at one end close to the air inlet, and is in detachable connection with the pipe wall of the air inlet pipeline 1.

[0041] Among them, the filter layer 5 is provided with synthetic glass fiber, nylon net and metal mesh and other filter materials, which physically intercepts the air and filters the particulate pollutants in the air, removing particulate matter above 0.3 μm; the adsorption layer 6 is provided with granular activated carbon and activated carbon fiber and other materials with highly developed pore structure, which adsorbs suspended particulate matter, bacteria, VOCs, TVOC and other air pollutants in the air, and purifies the air.

[0042] Through the above technical solution, the filter layer 5 and the adsorption layer 6 filter and adsorb particulate pollutants and air pollutants in the air.

[0043] In the present example, an air guide fan 7 is arranged between the adsorption layer 6 and the disinfection buffer pipeline 2.

[0044] Through the above technical solution, the air guide fan 7 accelerates the inflow speed of the air at the air inlet.

[0045] In the present example, a plurality of first baffles 8 and a plurality of second baffles 9 are arranged on one end of the disinfection buffer pipeline 2 close to the air inlet pipeline 1; the plurality of first baffles and the plurality of second baffles are arranged in turn and staggered, forming a disinfection buffer channel; a light transmission hole 18 is arranged on the disinfection buffer pipeline 2 between the two adjacent first baffles 8 and second baffles 9.

[0046] Among them, one end of the first baffle 8 is connected with the inner wall of the disinfection buffer pipeline 2, and a first opening is arranged between the other end of the first baffle 8 and the inner wall of the disinfection buffer pipeline 2; the second baffle 9 is connected with the inner wall of the disinfection buffer pipeline 2, and a second opening is arranged between the second baffle 9 and the inner wall of the disinfection buffer pipeline 2, and the first opening and the second opening are arranged in staggered manner.

[0047] The first baffle plate 8 and the second baffle plate 9 are arranged to fold and buffer the air in the disinfection buffer pipeline 2, thereby prolonging the residence time of the air in the disinfection unit and improving the sterilization rate. The disinfection buffer pipeline 2 between the two adjacent first baffle plate 8 and the second baffle plate 9 is provided with a light transmission hole 18. The ultraviolet light irradiated by the first ultraviolet lamp 11 enters the disinfection buffer pipeline 2 through the light transmission hole 18 and irradiates the flowing air between the first baffle plate and the second baffle plate 9, thereby performing the first disinfection on the air.

[0048] In the present example, the disinfection unit comprises a disinfection shell 10. The disinfection shell 10 is sleeved on the disinfection buffer pipeline 2 near one end of the air inlet pipeline 1 and is in communication with the light transmission hole 18. A plurality of first ultraviolet lamps 11 are detachably connected in the disinfection shell 10 to disinfect the air in the disinfection buffer pipeline 2.

[0049] Through the above technical solution, the first baffle plate 8 and the second baffle plate 9 prolong the residence time of the air in the ultraviolet irradiation disinfection area. The UVC (short-wave ultraviolet light) with a wavelength of 200-280 nm has a certain penetration and extremely strong killing power, which can kill pathogenic microorganisms in the air, thereby achieving the first disinfection of the air.

[0050] In the present example, the disinfection unit further comprises two groups of photocatalytic disinfection pipe groups. The two groups of photocatalytic disinfection pipe groups are respectively set as a first photocatalytic disinfection pipe group 15 and a second photocatalytic disinfection pipe group 16. The first photocatalytic disinfection pipe group 15 is arranged near one end of the air inlet pipeline 1. The second photocatalytic disinfection pipe group 16 is arranged away from the other end of the air inlet pipeline 1. A second ultraviolet lamp 17 is arranged between the first photocatalytic disinfection pipe group 15 and the second photocatalytic disinfection pipe group 16. The second ultraviolet lamp 17 is radially arranged in the disinfection buffer pipeline 2.

[0051] The photocatalytic disinfection pipe group comprises a plurality of photocatalytic disinfection pipes. The inner wall of the photocatalytic disinfection pipe is coated with a layer of photo-semiconductor material. The photocatalytic disinfection pipe has a regular hexagonal structure. The plurality of photocatalytic disinfection pipes are connected to form a honeycomb-shaped photocatalytic disinfection pipe group.

[0052] The photo-semiconductor material is preferably titanium dioxide. The titanium dioxide is nanoscale titanium dioxide. The nanoscale titanium dioxide is a general term for photo-semiconductor materials with photocatalytic (UVC) function.

[0053] The nanoscale titanium dioxide is coated on the inner wall surface of the photocatalytic disinfection pipe. Under the action of ultraviolet light, the nanoscale titanium dioxide will produce a photocatalytic reaction similar to photosynthesis.

[0054] Through the technical scheme, the wavelength of the second ultraviolet lamp is 200-280 nm, preferably 245 nm ultraviolet light; air flows from the first photocatalytic disinfection pipe group 15, passes through the second ultraviolet lamp 17, flows to the second photocatalytic disinfection pipe group 16, and after flowing out of the second photocatalytic disinfection pipe group 16, the second disinfection of the air is completed; the photocatalytic disinfection pipe group is in a honeycomb shape; the honeycomb pipe has small wind resistance and the air can directly penetrate through the honeycomb pipe without affecting the irradiation of the ultraviolet lamp; the photocatalytic disinfection pipe is in a regular hexagonal structure; the inner wall of the photocatalytic disinfection pipe has a large area, which can effectively increase the contact area of the air and the light semiconductor material, so that more bacteria on the light semiconductor material are killed, and the air disinfection efficiency is improved.

[0055] In the present example, the air flow buffering unit comprises an air flow buffering plate 12; the air flow buffering plate 12 is in a conical structure; the air flow buffering plate 12 is arranged axially in the disinfection buffering pipe 2; the large opening end of the air flow buffering plate 12 is detachably connected to one end of the disinfection buffering pipe 2 close to the air inlet pipe 1; and a plurality of air flow holes 13 are formed in the side wall of the air flow buffering plate 12.

[0056] In the present example, the small opening end of the air flow buffering plate 12 is closed.

[0057] Through the technical scheme, the air enters the large opening end of the air flow buffering plate 12 and flows out of the air flow holes 13 of the air flow buffering plate, so that the air is buffered.

[0058] In the present example, the inner wall of the air flow buffering plate 12 is detachably provided with a filter screen.

[0059] Through the technical scheme, the air flow buffering plate 12 buffers the air, and the filter screen (not shown in the figure) arranged in the air flow buffering plate 12 filters the air again to filter the residual particulate pollutants in the air.

[0060] In the present example, a spiral baffle 14 is detachably arranged in the air outlet pipe 3; and the spiral baffle 14 is arranged above the rotating plate 4.

[0061] Through the technical scheme, the plate surface width of the spiral baffle 14 is less than the radius; the straight-line flow of part of the air is changed into spiral flow by the spiral baffle 14, the flow rate of this part of the air is accelerated, the accumulation of the air at the connection between the disinfection buffering pipe 2 and the air outlet pipe 3 after passing through the air flow buffering plate 12 is prevented, and the air flow at the connection corner is accelerated; the other part of the air passes through the center of the air outlet pipe 3, and the accumulation or adhesion of dust on the inner wall of the air outlet pipe 3 is prevented.

[0062] Embodiment 2

[0063] A disinfection method of a central air conditioning air pipe, which is a disinfection method of the central air conditioning air pipe disinfection device provided in Embodiment 1, the method comprising the following steps:

[0064] Step one, air enters from the air inlet pipe 1, in turn through the filter layer 5 and the adsorption layer 6, filter and adsorb air, filter the particulate pollutants in the air, and adsorb the harmful gases in the air, while the air inlet pipe fan 7 speeds up the air entering the air inlet pipe;

[0065] Step two, air enters the disinfection pipe, is irradiated by the first ultraviolet lamp 11, and is disinfected, and under the action of the first baffle plate 8 and the second baffle plate 9, the residence time of air in the irradiation area of the first ultraviolet lamp 11 is prolonged, and the air is disinfected sufficiently;

[0066] Step three, the air after the first disinfection flows into the honeycomb-shaped photocatalytic disinfection pipe group, under the irradiation of the second ultraviolet lamp 17, from the first photocatalytic disinfection pipe group 15 to the second photocatalytic disinfection pipe group 16, the photo-semiconductor material on the inner wall of the photocatalytic disinfection pipe generates photocatalytic reaction under the action of the second ultraviolet lamp, and the air is disinfected for the second time;

[0067] Step four, the disinfected air enters the air flow buffer plate 12, flows out from the air flow hole 13 on the air flow buffer plate 12, buffers the air entering the air outlet pipe 3, and filters the disinfected air again through the filter screen on the air flow buffer plate 12;

[0068] Step five, air enters the air outlet pipe 3, enters the spiral baffle plate 14, and flows out from the air outlet of the air outlet pipe 3, and the air outlet of the air outlet pipe 3 is provided with a rotating plate 4, the rotating plate 4 rotates under the action of the air when the air flows out, and the rotating rotating plate 4 adjusts the air outlet angle and the air outlet size; when the air flows out fast, the rotating plate 4 rotates fast; when the air flows out slowly, the rotating plate 4 rotates slowly.

[0069] The central air conditioning air pipe disinfection device and disinfection method provided by the application are convenient to use, can treat the particulate pollutants and toxic air pollutants in the air, purify and disinfect the air, preliminarily filter and purify the air entering the pipe through the adsorption layer and the filter layer, disinfect the air twice through the first ultraviolet lamp and the second ultraviolet lamp, improve the disinfection and sterilization rate, buffer the air flow in the pipe through the air flow buffer plate, filter the disinfected air again through the filter screen on the inner wall of the air flow buffer plate, and accelerate the air flow at the outlet through the spiral baffle plate, and adjust the air outlet angle and the air outlet size at the air outlet through the rotating plate at the air outlet.

[0070] The above is only the preferred embodiment of the present application, and does not limit the technical scope of the present application. Any slight modification, equivalent change and modification made according to the technical essence of the present application to the above embodiment still belongs to the technical scope of the present application.

Claims

1. A central air conditioner air pipe disinfection device, characterized in that, The application relates to a central air conditioner air pipe disinfection device. The air inlet of the air inlet pipe is detachably provided with a filter adsorption unit. The disinfection buffer pipe is sequentially provided with a disinfection unit and an air flow buffer unit along the flow direction of air. The air outlet of the air outlet pipe is provided with a rotating plate; the rotating plate is in damping rotary connection with the inner wall of the air outlet pipe to adjust the air outlet size of the air outlet of the air outlet pipe. The disinfection buffer pipe is provided with a plurality of first baffles and a plurality of second baffles near one end of the air inlet pipe; the plurality of first baffles and the plurality of second baffles are sequentially staggered to form a disinfection buffer channel; the disinfection buffer pipe between the adjacent first baffle and the second baffle is provided with a light transmission hole. The disinfection unit comprises a disinfection shell; the disinfection shell is sleeved on one end of the disinfection buffer pipe near the air inlet pipe and communicates with the light transmission hole; a plurality of first ultraviolet lamps are detachably connected in the disinfection shell to disinfect the air in the disinfection buffer pipe. The disinfection unit further comprises two groups of photocatalytic disinfection pipe groups; the two groups of photocatalytic disinfection pipe groups are respectively set as a first photocatalytic disinfection pipe group and a second photocatalytic disinfection pipe group; the first photocatalytic disinfection pipe group is arranged at one end near the air inlet pipe; the second photocatalytic disinfection pipe group is arranged at one end away from the air inlet pipe; a second ultraviolet lamp is arranged between the first photocatalytic disinfection pipe group and the second photocatalytic disinfection pipe group; the second ultraviolet lamp is radially arranged in the disinfection buffer pipe. The photocatalytic disinfection pipe group comprises a plurality of photocatalytic disinfection pipes; the inner wall of the photocatalytic disinfection pipe is coated with a layer of photo semiconductor material; the photocatalytic disinfection pipe has a regular hexagonal structure; the plurality of photocatalytic disinfection pipes are connected to form a honeycomb-shaped photocatalytic disinfection pipe group. The air flow buffer unit comprises an air flow buffer plate; the air flow buffer plate has a conical structure; the air flow buffer plate is axially arranged in the disinfection buffer pipe; the large opening end of the air flow buffer plate is detachably connected with one end of the disinfection buffer pipe near the air inlet pipe; a plurality of air flow holes are formed in the sidewall of the air flow buffer plate. The inner wall of the air flow buffer plate is detachably provided with a filter screen. The air outlet pipe is detachably provided with a spiral baffle above the rotating plate. The filter adsorption unit comprises a filter layer and an adsorption layer; the adsorption layer is arranged at one end away from the air inlet; the filter layer is detachably connected with the pipe wall of the air inlet pipe; the filter layer is arranged at one end near the air inlet and is detachably connected with the pipe wall of the air inlet pipe.

2. The central air conditioner air pipe sterilization device according to claim 1, characterized in that, An air guide fan is arranged between the adsorption layer and the disinfection buffer pipe.

3. The central air conditioner air pipe sterilization device according to claim 2, characterized in that, The disinfection method of the central air conditioner air pipe disinfection device according to any one of claims 1 to 3 comprises the following steps:

4. A method of sterilizing a duct of a central air conditioner, characterized by, ​ Step one, air enters from the air inlet pipe, in turn through the filter layer and the adsorption layer, filter and adsorb air, filter the particulate pollutants in the air, and adsorb the harmful gases in the air, while the air inlet pipe fan speeds up the air into the air inlet pipe; Step two, the air enters the disinfection pipe, is irradiated by the first ultraviolet lamp, and is disinfected, and under the action of the first baffle and the second baffle, the residence time of the air in the irradiation area of the first ultraviolet lamp is prolonged, and the air is disinfected for the first time; Step three, the air after the first disinfection flows into the honeycomb-shaped photocatalytic disinfection pipe group, is irradiated by the second ultraviolet lamp, flows from the first photocatalytic disinfection pipe group to the second photocatalytic disinfection pipe group, and the photo-semiconductor material on the inner wall of the photocatalytic disinfection pipe generates photocatalytic reaction under the action of the second ultraviolet lamp, and the air is disinfected for the second time; Step four, the disinfected air enters the air flow buffer plate, flows out from the air flow holes on the air flow buffer plate, buffers the air about to enter the air outlet pipe, and filters the disinfected air again through the filter screen on the air flow buffer plate; Step five, the air enters the air outlet pipe, enters the spiral baffle, and flows out from the air outlet of the air outlet pipe, and the air outlet of the air outlet pipe is provided with a rotating plate, the rotating plate rotates under the action of the air when the air flows out, and the rotating rotating plate adjusts the air outlet angle and the air outlet size; when the air flows out fast, the rotating plate rotates fast; when the air flows out slowly, the rotating plate rotates slowly.

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