CN213955566U

CN213955566U - Photocatalyst air purification device and air treatment system

Info

Publication number: CN213955566U
Application number: CN202021594784.2U
Authority: CN
Inventors: 周绮丽; 陈宏�
Original assignee: Shenzhen Xingchendahai Environmental Protection Technology Co ltd
Current assignee: Shenzhen Xingchendahai Environmental Protection Technology Co ltd
Priority date: 2020-08-04
Filing date: 2020-08-04
Publication date: 2021-08-13
Anticipated expiration: 2030-08-04

Abstract

The utility model discloses a photocatalyst air purification device and an air treatment system, wherein the photocatalyst air purification device comprises a shell, the shell is provided with an inner cavity, and a pre-purification module, a first photocatalyst net, a first ultraviolet lamp, a second photocatalyst net and a fan module are sequentially arranged in the inner cavity along the air flowing direction; the first photocatalyst net, the first ultraviolet lamp and the second photocatalyst net are arranged in a laminated structure and are a first photocatalyst purification module of a modular structure; the first photocatalyst purification module is detachably arranged in the inner cavity. This technique has realized will first photocatalyst net, first ultraviolet lamp and second photocatalyst net design are the modularization technique, directly when the assembly with whole first photocatalyst purify the module realize with the casing peg graft can, realize fast-assembling and quick detach. The air inlet side of the air treatment system is provided with the photocatalyst air purification device, so that the air entering the air treatment system can be sterilized in advance.

Description

Photocatalyst air purification device and air treatment system

Technical Field

The utility model belongs to the technical field of the air purification technique and specifically relates to a photocatalyst air purification device and air treatment system.

Background

The photocatalyst material is a generic name of a semiconductor represented by TiO2 and having a photocatalytic function, and can excite electrons under a light irradiation condition, react the formed electrons and holes with oxygen and water molecules in the air to form hydroxyl radicals with extremely strong oxidizing power, decompose biomass (such as bacteria and viruses) in the air contacting with the photocatalyst, degrade organic matters and partial inorganic matters, and achieve the purpose of purifying the air.

Along with the development of technology, a lot of air purification devices based on photocatalyst and ultraviolet lamp have appeared, and these air purification devices generally include photocatalyst net and ultraviolet lamp, and in order to improve air purification efficiency, often are provided with two-layer photocatalyst net, then set up ultraviolet lamp between two-layer photocatalyst net. Through the mode, compared with the traditional single-layer photocatalyst net, the purification efficiency can be effectively improved. However, there are some technical problems, for example, since these ultraviolet lamps and photocatalyst nets are separately installed in the housing of the purification apparatus, which causes inconvenience in assembly, maintenance, etc.

Therefore, the above technical problem needs to be solved.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a photocatalyst air purification device, aim at realizes making things convenient for dismouting and maintenance with photocatalyst net and ultraviolet lamp modular structure.

In order to solve the technical problem, the utility model provides a basic technical scheme does:

a photocatalyst air purification device comprises a shell, wherein the shell is provided with an inner cavity, and a pre-purification module, a first photocatalyst net, a first ultraviolet lamp, a second photocatalyst net and a fan module are sequentially arranged in the inner cavity along the air flowing direction;

the first photocatalyst net, the first ultraviolet lamp and the second photocatalyst net are arranged in a laminated structure and are a first photocatalyst purification module of a modular structure; the first photocatalyst purification module is detachably arranged in the inner cavity.

Further, along the air flow direction, the inner chamber has a plurality of interval arrangements the screens, first photocatalyst purifies the module and can dismantle with a screens and peg graft.

Furthermore, the first photocatalyst purification module is provided with a fixing frame, the fixing frame is provided with through holes penetrating through two sides, and two sides of the fixing frame are respectively provided with assembling groove positions which are arranged in a concave mode towards the middle;

the first photocatalyst net and the second photocatalyst net are respectively arranged in the assembling groove positions on two sides, and the first ultraviolet lamp is arranged at the through hole.

Furthermore, the outer side surface of the first photocatalyst net and the outer side surface of the second photocatalyst net are respectively flush with the corresponding side surfaces of the fixing frame;

the fixing frame is provided with a notch part which is sunk inwards at the joint part of the first photocatalyst net and the fixing frame and the joint part of the second photocatalyst net and the fixing frame.

Furthermore, the device also comprises a second photocatalyst purification module, wherein the second photocatalyst purification module is detachably inserted with the clamping position;

wherein, the second photocatalyst purification module is provided with a third photocatalyst net and a second ultraviolet lamp and a third ultraviolet lamp which are respectively arranged at the two sides of the third photocatalyst net.

Further, the device comprises a plurality of groups of first photocatalyst purification modules and a plurality of groups of second photocatalyst purification modules; the first photocatalyst purification modules and the second photocatalyst purification modules are alternately arranged.

Further, the first ultraviolet lamp, the second ultraviolet lamp and the third ultraviolet lamp are net-shaped LED ultraviolet lamps or UV lamp tubes.

Furthermore, the pre-purification module and the fan module are of modular structures detachably connected with the inner cavity, and can be detachably assembled at the clamping position during assembly.

Further, the fan module comprises a plurality of fans which are transversely arranged.

The utility model discloses still provide an air treatment system, it includes the air inlet side and goes out the wind side, air inlet side department can dismantle and set up foretell arbitrary a photocatalyst air purification device.

The utility model has the advantages that:

the technical scheme of the utility model provides a photocatalyst air purification device and air treatment system, photocatalyst air purification device includes the casing, and this casing has an inner chamber, has purification module, first photocatalyst net, first ultraviolet lamp, second photocatalyst net and fan module in proper order along the air flow direction in this inner chamber; the first photocatalyst net, the first ultraviolet lamp and the second photocatalyst net are arranged in a laminated structure and are a first photocatalyst purification module of a modular structure; the first photocatalyst purification module is detachably arranged in the inner cavity. This technique has realized will first photocatalyst net, first ultraviolet lamp and second photocatalyst net design are the modularization technique, directly when the assembly with whole first photocatalyst purify the module realize with the casing peg graft can, realize fast-assembling and quick detach. Wherein air handling system's air inlet side has photocatalyst air purification device, and this technique can realize disinfecting in advance to the air that gets into air handling system.

Drawings

Fig. 1 is a schematic structural view of a photocatalyst air purification device of the present invention;

FIG. 2 is a cross-sectional view of a first photocatalyst cleaning module;

FIG. 3 is a schematic view of a first photocatalyst cleaning module;

FIG. 4 is a cross-sectional view of the mount;

FIG. 5 is a schematic view of a first UV lamp spanning the through-hole;

FIG. 6 is a schematic view of a first UV lamp being a mesh LED UV lamp;

FIG. 7 is a schematic view of the card;

FIG. 8 is a schematic structural view of the inner chamber with a plurality of detents;

FIG. 9 is a schematic structural view of the housing in a structurally open state;

fig. 10 is a schematic layout of a first power supply interface;

FIG. 11 is a schematic structural diagram of a first photocatalyst cleaning module and a second photocatalyst cleaning module;

FIG. 12 is a schematic view of a second photocatalyst cleaning module;

FIG. 13 is a schematic structural diagram of a plurality of first photocatalyst purification modules and a plurality of second photocatalyst purification modules alternately arranged;

FIG. 14 is a schematic structural diagram of a fan module;

FIG. 15 is a schematic view of an air treatment system.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to fig. 1 to 15, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, in the embodiments of the present invention, the directions are shown in the attached drawings. If a particular gesture changes, the directional indication changes accordingly. Wherein the arrows in the figure refer to the air flow direction.

Referring to fig. 1 and 2, the photocatalyst air purification device of the present invention includes a housing 1, the housing 1 has an inner cavity 11, and the inner cavity 11 is sequentially provided with a pre-purification module 2, a first photocatalyst net 31, a first ultraviolet lamp 32, a second photocatalyst net 33 and a fan module 5 along an air flowing direction; the first photocatalyst net 31, the first ultraviolet lamp 32 and the second photocatalyst net 33 are the first photocatalyst purification module 3 which is arranged in a laminated structure and is in a modular structure; the first photocatalyst purification module 3 is detachably arranged in the inner cavity 11. The air flowing direction refers to the flowing direction of air from the air inlet to the air outlet. The photocatalyst air purification device may be configured as a vertical structure as shown in fig. 1, or may be configured as a bedroom structure as shown in fig. 1 after being rotated 90.

It is very important, in this technical scheme promptly, first photocatalyst net 31, first ultraviolet lamp 32 and second photocatalyst net 33 are integral modular structure, can wholly place when assembling in inner chamber 11, can wholly dismantle when dismantling, just so made things convenient for operations such as assembly and maintenance, change.

Referring to fig. 2 to 4, the first photocatalyst cleaning module 3 has a fixing frame 34, the fixing frame 34 has a through hole 341 penetrating through two sides, and two sides of the fixing frame 34 respectively have an assembling slot 342 recessed toward the middle; the first photocatalyst net 31 and the second photocatalyst net 33 are respectively disposed in the assembling slots 342 at two sides, and the first ultraviolet lamp 32 is disposed at the through hole 341. That is, the first photocatalyst net 31, the first ultraviolet lamp 32 and the second photocatalyst net 33 are arranged on the fixing frame 34 to form a modular structure. The fixing frame 34 is a one-piece structure, which can be formed by plastic in one step. During assembly, the first photocatalyst net 31 and the second photocatalyst net 33 are respectively clamped into the assembly groove 342 from two sides. Referring to fig. 4, it should be understood that, in the present embodiment, the size and shape of the assembling slot 342 are the same as those of the photocatalyst net, and when assembling, the first photocatalyst net 31 and the second photocatalyst net 33 can be assembled with the corresponding assembling slot 342 by interference fit, as shown in fig. 2. Of course, in order to realize the matching of the first photocatalyst net 31 and the second photocatalyst net 33 distributed on the fixing frame 34, screws may be used to screw the first photocatalyst net 31 and the second photocatalyst net 33 to the fixing frame 34.

Correspondingly, the first ultraviolet lamp 32 may be disposed around the side of the through hole 341, such that the ultraviolet rays emitted from the first ultraviolet lamp 32 may directly irradiate on the first photocatalyst net 31 and the second photocatalyst net 33. In addition, the first ultraviolet lamp 32 can be disposed at the through hole 341 in a crossing manner, which can ensure that the ultraviolet light emitted by the first ultraviolet lamp 32 can better irradiate the first photocatalyst net 31 and the second photocatalyst net 33, as shown in fig. 5. In other embodiments, the LED uv lamps are net-shaped and arranged transversely at the through holes 341, so that the emitted uv light is more uniformly irradiated on the first photocatalyst net 31 and the second photocatalyst net 33, as shown in fig. 6.

As shown in fig. 2 and 3, the outer side surfaces of the first photocatalyst mesh 31 and the second photocatalyst mesh 33 are flush with the corresponding side surfaces of the fixing frame 34, respectively; the fixing frame 34 has a notch 343 near the joint between the first photocatalyst net 31 and the fixing frame 34 and the joint between the second photocatalyst net 33 and the fixing frame 34. The side surfaces of the first photocatalyst net 31 and the second photocatalyst net 33 are partially exposed through the notch 343, so that when the first photocatalyst net 31 and the second photocatalyst net 33 need to be detached, a force is applied to the photocatalyst nets through the notch 343.

It should be understood that the first photocatalyst purification module 3 of the present solution has a compact structure, forms a square structure, and is directly placed in the inner cavity 11 during assembly. Specifically, a position lock 12 for supporting the first photocatalyst purification module 3 is disposed in the inner cavity 11, and the first photocatalyst purification module 3 is supported by the position lock 12. Wherein, with reference to fig. 7, each of said catches 12 comprises two catch portions 121, which two catch portions 121 are arranged diametrically opposite to the inner side of the housing 1. During assembly, the first photocatalyst cleaning module 3 is clamped in the clamping grooves 122 of the two clamping groove parts 121, so that the assembly is very convenient. Particularly, the width of each card slot 122 is consistent with the thickness of the first photocatalyst purification module 3, so that the first photocatalyst purification module 3 can be ensured not to be loosened after being inserted into the card slot 122. Wherein each slot portion 121 is detachably connected to the inner side of the housing 1, for example by screws. Of course, the structure of the block 12 can also be realized by the structure existing in the field.

In other embodiments, a plurality of first photocatalyst cleaning modules 3 may be disposed according to different air cleaning requirements, for example, two, three or more first photocatalyst cleaning modules 3 are stacked along the air flowing direction to enhance the air cleaning. Specifically, along the air flowing direction, the inner cavity 11 has a plurality of the detents 12 arranged at intervals, and one of the first photocatalyst purification modules 3 is detachably plugged with one of the detents 12, as shown in fig. 8. In addition, a supporting frame (not shown in the drawings) may be disposed in the inner cavity 11, a plurality of supporting slots are disposed in the supporting frame from top to bottom, the first photocatalyst module 3 may be inserted into the supporting slots, and the supporting frame may be implemented by using the existing technology, which is not described herein.

Referring to fig. 9, in order to realize the convenient assembly of the first photocatalyst cleaning module 3, one side portion 13 of the housing 1 is configured to be reversible, i.e. to form an integral structure when closed, and when opened, the inner cavity 11 is opened outwards to facilitate the insertion of the first photocatalyst cleaning module 3 into the position of the clamping position 12 or the removal of the first photocatalyst cleaning module 3. Preferably, when the side portion 13 is closed, it can seal the cavity 11 in the circumferential direction, preventing air from leaking from the cavity 11 to the circumferential side.

In addition, as shown in fig. 10, in a preferred embodiment, the power supply end of the air purification apparatus has a plurality of first power supply interfaces 14 arranged along the air flowing direction, and the first ultraviolet lamp 32 of the first photocatalyst purification module 3 is inserted into one first power supply interface 14 to be electrically connected, so as to realize power supply. During assembly, after the first photocatalyst purification module 3 is assembled in the inner cavity 11, the corresponding first power supply interface 14 is connected with the corresponding first ultraviolet lamp 32. Each first power supply interface 14 is a power supply controller connected to the air purification apparatus, and the power supply controller is implemented by using a known power supply apparatus, for example, several first power supply interfaces 14 are connected to a power supply terminal of the air purification controller, and the air purification controller performs unified power supply, which is, of course, a control device of an existing air purification apparatus. And, the first power supply interface 14 may adopt a wire interface known in the art. Specifically, the first power supply interface 14 may be a power line electrically connected to the power output end of the power supply device, and each first power supply interface 14 is electrically connected to the power line in parallel, so as to supply power. Correspondingly, the inner side of each clamping position 12 is correspondingly provided with one first power supply interface 14, and when the first photocatalyst purification module 3 is inserted into the clamping position 12, the electric connector of the first ultraviolet lamp 32 of the first photocatalyst purification module 3 is just plugged with the first power supply interface 14 to realize power supply. Specifically, the first power supply interface 14 may be a pin, and the electrical connection interface of the first external light 32 may be a socket, so that the first external light can be plugged together. It should be understood that each first photocatalyst cleaning module 3 includes a driver (not shown in the figure), the driver is assembled on the fixing frame 34, and the driver has an electrical connection port, and the electrical connection port is plugged with the first power supply interface 14. The first power supply interface 14 of each card 12 is opposite to the corresponding electrical connection port at the position of the card 12, so that the first power supply interface 14 and the electrical connection port can be plugged when the whole first photocatalyst purification module 3 is plugged. The first power supply interface 14 and the corresponding first uv lamp 32 may be implemented by any suitable electrical connector, so long as it is ensured that the position at the inner side of the clip 12 is arranged opposite to each other.

As shown in fig. 11 and 12, in other embodiments, the device further includes a second photocatalyst cleaning module 4, and the second photocatalyst cleaning module 4 is detachably connected to a card 12; wherein, the second photocatalyst cleaning module 4 has a third photocatalyst net 41 and a second ultraviolet lamp 42 and a third ultraviolet lamp 43 respectively disposed at two sides of the third photocatalyst net 41. The third photocatalyst net 41 is clamped by the second ultraviolet lamp 42 and the third ultraviolet lamp 43, so that two side surfaces of the photocatalyst net 41 can be irradiated, the photocatalyst effect is improved, and the air purification capacity is enhanced. And adopt the first photocatalyst to purify the combination setting of module 3 and second photocatalyst purification module 4, can utilize the ultraviolet ray light that the second photocatalyst purified module 4 to shine first photocatalyst net 31 or second photocatalyst net 33 of first photocatalyst purification module 3, strengthen first photocatalyst and purify the purification ability of module 3.

In detail, the second photocatalyst cleaning module 4 includes a frame 44, the third photocatalyst net 41 is disposed in the middle of the frame 44, the second ultraviolet lamp 42 and the third ultraviolet lamp 43 are respectively disposed at two sides of the frame 44, and the second ultraviolet lamp 42 and the third ultraviolet lamp 43 are respectively used for irradiating two side surfaces of the third photocatalyst net 41. Preferably, the second ultraviolet lamp 42 and the third ultraviolet lamp 43 are net-shaped LED ultraviolet lamps or UV lamps in order to improve irradiation efficiency. It should be understood that, in this technical solution, the thickness of the second photocatalyst purification module 4 is consistent with the thickness of the first photocatalyst module 3, so as to be conveniently inserted into the card 12. Wherein the first uv lamp 42 and the third uv lamp 43 are electrically connected together and connected to a second driver (not shown) which is connected to a second electrical connector which is detachably electrically plugged together with the corresponding first power supply interface 14 when assembled. The second electrical connector and the second driver are disposed in the same manner as the electrical connector and the driver of the first photocatalyst cleaning module 3, which is not described herein again.

In some embodiments, as shown in fig. 13, the device includes a plurality of first photocatalyst cleaning modules 3 and a plurality of second photocatalyst cleaning modules 4; the plurality of groups of first photocatalyst purification modules 3 and the plurality of groups of second photocatalyst purification modules 4 are alternately arranged. Namely, the irradiation effect of the ultraviolet lamp on the photocatalyst net is enhanced by the first photocatalyst purification modules 3 and the plurality of groups of second photocatalyst purification modules 4 which are alternately arranged. Especially, when the photocatalyst that sets up purifies the total number of module for being more than or equal to three odd numbers of group, along the air flow direction, the first group and the last photocatalyst of group purify the module and purify module 4 for the second photocatalyst, can realize effectively shining the photocatalyst net of inboard first photocatalyst purification module 3 like this, improve the air purification ability. Through the alternate combination of the first photocatalyst purification module 3 of multiunit and the second photocatalyst purification module 4 of multiunit promptly, can realize high-efficient purification.

In addition, in some embodiments, the first photocatalyst mesh 31, the second photocatalyst mesh 33, and the third photocatalyst mesh 41 include a sub-HEPA layer and a photocatalyst layer on the surface of the sub-HEPA layer. Wherein the photocatalyst layer is a nano titanium dioxide coating. Because the sub-HEPA layer has a large enough surface area, the surface area of the photocatalyst layer can be increased to achieve the purpose of enhancing the air purification capability.

Referring to fig. 1 and 10, in some embodiments, the pre-cleaning module 2 and the fan module 5 are modular structures that are removably coupled to the interior chamber 11. That is, the pre-purification module 2 and the fan module 5 can be detachably matched with the inner cavity 11 of the housing 1 as well as the first photocatalyst purification module 3. During assembly, the respective pre-cleaning module 2 and the fan module 5 are inserted directly into the interior 11. When replacement and maintenance are required, the pre-purification module 2 and the fan module 5 can be directly detached. The fan module 5 is inserted into the inner cavity 11, and the electric wire of the fan module 5 is connected to the second power supply interface 15. The second power supply interface 15 is connected to one of the power output pins of the power supply controller, and the second power supply interface 15 can provide a voltage for the fan module 5 to operate, such as 12V, 24V, or 36V. In some embodiments, referring to fig. 14, the fan module 5 comprises a plurality of fans 51 arranged laterally. I.e., a plurality of fans 51 are used to draw air. The adoption of the fan 51 can reduce noise on the basis of satisfying air draft. Specifically, the fan module 51 further includes a casing 52, the casing 52 has a through hole, a plurality of support frames 53 are disposed at the through hole, and each support frame 53 is disposed with one fan 51. During assembly, the support frame 53 can be directly inserted into the inner cavity 11 to complete the assembly of the whole fan module 5. It should be understood that in the present embodiment, four fans 51 may be provided, which are arranged in a square arrangement. Wherein, the four fans 51 are connected to the second power supply connection nozzle 15 through wires and connections to realize power supply.

In a word, through the technical scheme of the utility model, make things convenient for photocatalyst net, ultraviolet lamp's dismouting, solve traditional air purifier and tear open changeing, maintain inconvenient problem such as change. It should be noted that the photocatalyst air purification device of this technique can be used in different occasions, for example can regard as the air purification disinfection of indoor air purification equipment, air conditioning system's air inlet end or air-out end department to and as the air purification of occasions that there is the peculiar smell such as shoe cabinet, for example use when the shoe cabinet, arrange one in the shoe cabinet photocatalyst air purification device, carry out purification treatment through the device to the foul smell in the shoe cabinet. Very important, the technical scheme of the utility model through the built-in screens of casing and first power supply interface and second power supply interface, can realize the demountable assembly of all modules (including first photocatalyst module, second photocatalyst module, fan and purification module etc.), realize the modularized design.

In other embodiments, the front side of the housing 1 is further provided with a display screen (not shown), and the display screen is electrically connected with the power supply device. The display screen is internally provided with an internet of things network module, and the internet of things network module can be interconnected with an external network to realize the purpose of receiving data so as to meet the requirement of updating the playing content of the display screen. Of course, the internet of things network module is realized by adopting the prior art. The display screen can adopt the existing liquid crystal display screen. The size of the display screen is selected according to the size of the front side of the housing 1. As a more preferable embodiment, an air cooler (not shown) is disposed in the inner cavity of the housing 1 near the air outlet, the air cooler is electrically connected to the power supply device, and when the air cooler is used, the air cooler cools the purified air and discharges the cooled air.

Referring to fig. 15, another aspect of the present invention provides an air processing system, which includes an air inlet side 10 and an air outlet side 20, the air inlet side 10 can be detachably disposed with any one of the above photocatalyst air purification devices 30. It should be understood that as shown in fig. 15, the air entering the air intake side of the air treatment system firstly enters the inlet of the photocatalyst air purification device 30, and is outputted from the outlet after coming and sterilizing in the photocatalyst air purification device 30, and the air purified by the photocatalyst air purification device 30 enters the air treatment system body 40 for treatment. The air treatment system can be an air refrigeration system, a fresh air system, an air heating system and the like. In particular, the air handling system may be an air conditioner (e.g., a cabinet air conditioner, a wall-mounted air conditioner, a central air conditioner, etc.). Namely, the air is purified, disinfected and sterilized before entering the air conditioner, and the air with germs and the like is sterilized, so that the safety of indoor air is ensured.

Variations and modifications to the above-described embodiments may occur to those skilled in the art, in light of the above teachings and teachings. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should fall within the protection scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims

1. The utility model provides a photocatalyst air purification device, includes casing (1), and this casing (1) has an inner chamber (11), has in this inner chamber (11) along the air flow direction in proper order and purifies module (2), first photocatalyst net (31), first ultraviolet lamp (32), second photocatalyst net (33) and fan module (5), its characterized in that:

the first photocatalyst purification module (3) which is arranged in a laminated structure and is in a modular structure is formed by the first photocatalyst net (31), the first ultraviolet lamp (32) and the second photocatalyst net (33); the first photocatalyst purification module (3) is detachably arranged in the inner cavity (11).

2. The photocatalyst air purification device as claimed in claim 1, wherein:

along the air flow direction, inner chamber (11) have screens (12) of a plurality of interval arrangements, first photocatalyst purifies module (3) and can dismantle the grafting with a screens (12).

3. The photocatalyst air purification device as claimed in claim 1, wherein:

the first photocatalyst purification module (3) is provided with a fixed frame (34), the fixed frame (34) is provided with a through hole (341) penetrating through two sides, and two sides of the fixed frame (34) are respectively provided with an assembling slot position (342) which is arranged towards the middle in a concave manner;

the first photocatalyst net (31) and the second photocatalyst net (33) are respectively arranged in the assembling groove positions (342) on two sides, and the first ultraviolet lamp (32) is arranged at the through hole (341).

4. The photocatalyst air purification device as claimed in claim 3, wherein:

the outer side surface of the first photocatalyst net (31) and the outer side surface of the second photocatalyst net (33) are respectively flush with the corresponding side surfaces of the fixing frame (34);

the fixing frame (34) is provided with a notch part (343) which is sunk at the position close to the joint part of the first photocatalyst net (31) and the fixing frame (34) and the joint part of the second photocatalyst net (33) and the fixing frame (34).

5. The photocatalyst air purification device as claimed in any one of claims 2 to 4, wherein:

the device also comprises a second photocatalyst purification module (4), wherein the second photocatalyst purification module (4) is detachably inserted with the clamping position (12);

wherein, the second photocatalyst purification module (4) is provided with a third photocatalyst net (41) and a second ultraviolet lamp (42) and a third ultraviolet lamp (43) which are respectively arranged at the two sides of the third photocatalyst net (41).

6. The photocatalyst air purification device as claimed in claim 5, wherein:

comprises a plurality of groups of first photocatalyst purification modules (3) and a plurality of groups of second photocatalyst purification modules (4); the plurality of groups of first photocatalyst purification modules (3) and the plurality of groups of second photocatalyst purification modules (4) are alternately arranged.

7. The photocatalyst air purification device as claimed in claim 5, wherein:

the first ultraviolet lamp (32), the second ultraviolet lamp (42) and the third ultraviolet lamp (43) are net-shaped LED ultraviolet lamps or UV lamp tubes.

8. The photocatalyst air purification device as claimed in claim 5, wherein:

the pre-purification module (2) and the fan module (5) are of a modular structure detachably connected with the inner cavity (11), and are detachably assembled at the position of the clamping position (12) during assembly.

9. The photocatalyst air purification device as claimed in claim 8, wherein:

the fan module (5) comprises a plurality of fans (51) arranged transversely.

10. An air handling system, includes air inlet side (10) and air-out side (20), its characterized in that:

the air inlet side (10) is detachably provided with a photocatalyst air purification device as claimed in any one of claims 1 to 9.