Fan-coil unit return air section photocatalytic purifier

Abstract

The application provides a fan coil return air section photocatalytic purifier, and relates to the technical field of photocatalytic purifiers.The fan coil return air section photocatalytic purifier comprises a case, the two sides of the case are provided with ports for ventilation, a filter component and a purification component are arranged in the case, the filter component is a plurality of activated carbon plates which are arranged equidistantly in the case in sequence, the purification component comprises a light purification mechanism and a buckle mechanism, a cleaning tank is further arranged on one side of the case and is communicated with the case, the light purification mechanism is arranged in the case, the buckle mechanism is arranged in the cleaning tank, and a cleaning component is further arranged on the side of the buckle mechanism.The ultraviolet lamp tube of the fan coil return air section photocatalytic purifier is arranged in a clamping groove fixing mode, so that the ultraviolet lamp tube can be taken out at any time for cleaning, and the corresponding ultraviolet lamp tube can be directly taken out from a maintenance door on the top of the cleaning tank for maintenance, thereby replacing the traditional bolt and clamp fixing mode and being convenient to use.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of photocatalytic purifier, in particular to a fan coil return air section photocatalytic purifier. BACKGROUND

[0002] The return air section of the fan coil is a key component of the air conditioning terminal system, responsible for circulating indoor air into the unit for heat exchange. In some environments, in order to ensure the air discharge quality of the fan, a photocatalytic purifier is installed at the port of the fan return air section, which converts harmful gases into carbon dioxide and water through the effect of ultraviolet light.

[0003] The publication number CN205717576U discloses a photocatalytic purifier, which comprises a purifier body composed of a gas tank, an ultraviolet lamp and a filter screen. The inner wall of the gas tank is coated with a photocatalyst. The gas tank is provided with an air inlet and an air outlet at its front and rear ends respectively. The left and right sides and the top surface of the gas tank are uniformly distributed with lamp mounting holes. The lamp mounting holes on the left side, the right side and the top surface of the gas tank are not on the same horizontal plane. The ultraviolet lamp is placed in the gas tank through the lamp mounting holes. The filter screen is arranged on the air inlet. Compared with the traditional air purifier, the photocatalytic purifier is safe and reliable, has fast photocatalytic reaction degradation efficiency, fully irradiates and purifies the air, has better effect and wider application range.

[0004] The above device sets the position of the ultraviolet lamp in a rectangular array. The long-term discharged gas contains many impurities. Contacting the high-temperature lampshade will cause the impurities to stay and form dirt clumps, which need to be cleaned regularly. Placing a cleaning device in the equipment will affect the use of the internal space of the casing and also affect and reduce the air purification efficiency. If a cleaning device is installed outside the equipment, the lampshade is cleaned by being removed as a whole. Due to the array distribution of the lampshade, the lampshade located in the middle is located in a cleaning dead angle, making it difficult to ensure that every lampshade can be cleaned in place. SUMMARY

[0005] The present application aims to overcome the shortcomings of the prior art and provides a fan coil return air section photocatalytic purifier, which solves the problem of placing a cleaning device in the equipment, which affects the use of the internal space of the casing and also affects and reduces the air purification efficiency. If a cleaning device is installed outside the equipment, the lampshade is cleaned by being removed as a whole. Due to the array distribution of the lampshade, the lampshade located in the middle is located in a cleaning dead angle, making it difficult to ensure that every lampshade can be cleaned in place.

[0006] The application provides the following technical scheme to solve the above technical problems: a photocatalytic purifier for a return air section of a fan-coil unit, comprising a cabinet, the two sides of the cabinet are provided with ports for ventilation, the inside of the cabinet is provided with a filtering component and a purifying component, the filtering component is a plurality of activated carbon plates, which are arranged equidistantly in the inside of the cabinet, the purifying component comprises a light purifying mechanism and a buckle mechanism, one side of the cabinet is further provided with a cleaning tank, the cleaning tank is communicated with the cabinet, the light purifying mechanism is arranged in the inside of the cabinet, the buckle mechanism is arranged in the inside of the cleaning tank, the side of the buckle mechanism is further provided with a cleaning component, the upper side of the buckle mechanism is further provided with a sponge pad mechanism, a lead screw transmission machine is further installed in the inside of the cleaning tank, which drives the buckle mechanism to move up and down reciprocatingly, the buckle mechanism is further provided with a driving mechanism.

[0007] The light purifying mechanism comprises a plurality of ultraviolet lamp tubes, each of the ultraviolet lamp tubes is arranged in a matrix in the inside of the cabinet, and each of the ultraviolet lamp tubes is movably installed in the inside of the cabinet, the buckle mechanism sequentially pulls each row of ultraviolet lamp tubes into the inside of the cleaning tank, the cleaning component performs high-pressure spray gun descaling on the ultraviolet lamp tubes, the lead screw transmission machine contacts the ultraviolet lamp tubes to the sponge pad mechanism, and the driving mechanism drives the ultraviolet lamp tubes to rotate and wipe off water stains on the bodies of the ultraviolet lamp tubes.

[0008] As a preferred, the sponge pad mechanism comprises a fixed support and a sponge pad body, one side of the fixed support is provided with a rotating sleeve, the rotating sleeve is rotatably sleeved on a lead screw of the lead screw transmission machine, the fixed support is provided with a groove, the sponge pad body is clamped on the groove and fixed by bolts.

[0009] As a preferred, the buckle mechanism comprises a plurality of linear modules, the number of the linear modules is equal to the number of one row of the ultraviolet lamp tubes, a guide block on the linear module is fixedly connected with a sliding block, the sliding block is provided with an electric motor, an output shaft of the electric motor is fixedly connected with a support rod, and an end of the support rod is fixedly connected with a buckle body.

[0010] As a preferred, both ends of each of the ultraviolet lamp tubes are fixedly connected with a first side plate and a second side plate, the first side plate is close to one end of the linear module, the first side plate is fixedly connected with an arc-shaped slide rail support, when a side wall of the sliding block is close to the arc-shaped slide rail support, the electric motor drives the support rod to rotate towards the arc-shaped slide rail support, so that the buckle body slides to the inside of the arc-shaped slide rail support, and the buckle body is clamped on the arc-shaped slide rail support.

[0011] As a preferred, the lead screw transmission machine further has a sliding rod, one side of the linear module is fixedly connected with a lead screw sleeve, the lead screw sleeve is provided with a screw hole and a sliding hole, the screw hole is engagedly connected with the lead screw, and the sliding hole is slidably connected with the sliding rod.

[0012] As preferred, connecting rods are fixedly connected between adjacent straight module groups;

[0013] The second side plate is provided with a transmission part, which is a rotating rod with two flywheels.

[0014] As preferred, the driving mechanism comprises a first gear, a first motor, a bottom plate and a second motor.

[0015] As preferred, a housing is fixedly connected to the rear side of the cabinet to accommodate the flywheel outside

[0016] As preferred, the cabinet side wall is further provided with an electric door, which is provided with a door plate.

[0017] As preferred, the cleaning tank is provided with a maintenance door at the upper part, and the side wall of the cleaning tank is provided with a ventilation hole.

[0018] Compared with the prior art, the light catalytic purifier for the return air section of the fan coil has the following beneficial effects:

[0019] I. The UV lamp is pulled into the cleaning tank by the straight module, the cleaning agent is high-pressure sprayed on the surface of the lampshade of the UV lamp, and the scale is removed.

[0020] II. After cleaning, the door plate is arranged on the passage between the cabinet and the cleaning box, realizing the separation between the cabinet and the cleaning box, and the first side plate is also blocked in the gap of the cabinet side wall. The ports at both ends of the cabinet are connected with the ventilation pipeline, so that the cabinet is in a closed state on both sides when the hot gas is purified, preventing the loss of hot gas. Meanwhile, the gap and the clamping groove respectively fix the two sides of the ultraviolet lamp tube. When the hot gas is contacted, the stability of the ultraviolet lamp tube is maintained, and the efficiency of the hot gas purification is maintained. During the cleaning process of the ultraviolet lamp tube, the door plate is retracted, the gap on one side of the ultraviolet lamp tube fixes the ultraviolet lamp tube, and the ultraviolet lamp tube is prevented from falling. The ultraviolet lamp tube is arranged in the clamping groove, which is convenient for taking out for cleaning at any time. The corresponding ultraviolet lamp tube can also be directly taken out from the maintenance door above the cleaning box for maintenance, instead of the traditional bolt clamp fixing mode, which is convenient to use.

[0021] III. When the ultraviolet lamp tube is subjected to high-pressure flushing, the first gear can be rotated by the second motor, so that the first gear and the second gear are engaged, thereby driving the transmission between the flywheel and the chain. As shown in the figure, the rotating rod of the flywheel penetrates the lampshade of the ultraviolet lamp tube, and the lampshade of the ultraviolet lamp tube is rotationally connected to the lamp holder. Therefore, when the rotating rod rotates, the lampshade of the ultraviolet lamp tube also rotates synchronously. Therefore, the second motor can drive the ultraviolet lamp tube lampshade fixed on the linear module to rotate synchronously, so that the lampshade of the ultraviolet lamp tube can rotate to contact the high-pressure water flow for cleaning without dead angle, ensuring the cleaning quality. After cleaning, the rotating ultraviolet lamp tube lampshade contacts the sponge pad body above to wipe off the water, and then returns to the original position, ensuring that the ultraviolet lamp tube lampshade is cleaned without dead angle, and at the same time, the ultraviolet lamp tube lampshade can be directly put into the hot gas photocatalytic process after cleaning, omitting the process of removing water from the lampshade, and improving the use efficiency of the equipment.

[0022] Other advantages, objects, and features of the application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the application;

[0024] Figure 2 It is a schematic diagram of the structure of the cleaning part of the application;

[0025] Figure 3 It is a schematic diagram of the structure of the lead screw conveyor of the application;

[0026] Figure 4 It is a schematic diagram of the structure of the lead screw conveyor of the application; Figure 3 It is an enlarged schematic diagram of the structure at A in the application;

[0027] Figure 5 For the invention Figure 3 structure enlarged view at B in the invention;

[0028] Figure 6 For the invention linear module structure schematic diagram;

[0029] Figure 7 For the invention Figure 6 structure enlarged view at C in the invention;

[0030] Figure 8 For the invention light purification mechanism structure schematic diagram;

[0031] Figure 9 For the invention drive mechanism structure schematic diagram;

[0032] Figure 10 For the invention machine case and shell structure schematic diagram;

[0033] Figure 11 For the invention electric door and door plate structure schematic diagram;

[0034] Figure 12 For the invention Figure 11 structure enlarged view at D in the invention.

[0035] In the figure: 1, the machine case; 101, port; 102, the shell; 103, the notch; 104, the electric door; 105, the door plate; 106, the clamping groove; 2, the cleaning box; 201, the maintenance door; 202, the ventilation hole; 3, the storage barrel; 4, the mounting plate; 401, the high-pressure spray head; 402, the joint; 5, the sponge pad mechanism; 501, the fixed support; 502, the sponge pad body; 503, the rotating sleeve; 6, the screw rod transmission machine; 601, the sliding rod; 602, the screw rod; 7, the buckle mechanism; 701, the linear module; 702, the screw rod sleeve; 703, the sliding block; 704, the arc-shaped sliding rail support; 705, the buckle body; 706, the connecting rod; 707, the support rod; 708, the electric motor; 8, the light purification mechanism; 801, the ultraviolet lamp; 802, the first side plate; 803, the connecting plate; 804, the transmission part; 805, the chain; 806, the second side plate; 807, the second gear; 9, the drive mechanism; 901, the first gear; 902, the first motor; 903, the curved rod; 904, the bottom plate; 905, the second motor. DETAILED DESCRIPTION

[0036] Clearly, the described embodiments are merely a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative effort shall fall within the protection scope of the present application.

[0037] Please refer to Figures 1-12 The present application provides the following embodiments: a fan coil return air section photocatalytic purifier, comprising a cabinet 1, the two sides of the cabinet 1 have ports 101 for ventilation, the inside of the cabinet 1 is provided with a filtering component and a purifying component, the filtering component is a plurality of activated carbon plates, which are arranged equidistantly in the inside of the cabinet 1, the purifying component comprises a light purifying mechanism 8 and a buckle mechanism 7, the cabinet 1 is further provided with a cleaning tank 2 on one side, the cleaning tank 2 is in communication with the cabinet 1, the light purifying mechanism 8 is arranged in the inside of the cabinet 1, the buckle mechanism 7 is arranged in the inside of the cleaning tank 2, the buckle mechanism 7 is further provided with a cleaning component on the side edge, a sponge pad mechanism 5 is further arranged above the buckle mechanism 7, a lead screw transmission machine 6 is further installed in the inside of the cleaning tank 2, which drives the buckle mechanism 7 to move up and down reciprocatingly, a driving mechanism 9 is further installed on the buckle mechanism 7.

[0038] The light purifying mechanism 8 comprises a plurality of ultraviolet lamp tubes 801, each of which is distributed in a matrix in the inside of the cabinet 1, and each of which is movably installed in the inside of the cabinet 1, the buckle mechanism 7 sequentially pulls each row of ultraviolet lamp tubes 801 into the inside of the cleaning tank 2, the cleaning component performs high-pressure spray cleaning on the ultraviolet lamp tubes 801, the lead screw transmission machine 6 contacts the ultraviolet lamp tubes 801 to the sponge pad mechanism 5, and the driving mechanism 9 drives the ultraviolet lamp tubes 801 to rotate and wipe off water stains on the tubes.

[0039] In the present embodiment, the sponge pad mechanism 5 comprises a fixed support 501 and a sponge pad body 502, one side of the fixed support 501 is provided with a rotating sleeve 503, the rotating sleeve 503 is rotatably sleeved on a lead screw 602 of the lead screw transmission machine 6, the fixed support 501 is provided with a groove, the sponge pad body 502 is clamped on the groove and fixed by bolts, the sponge pad body 502 is detachably arranged on the support 501, which facilitates the replacement of the sponge pad body 502 in the later period, and at the same time, the space inside the cabinet 1 is saved and utilized, one end of the fixed support 501 is fixed on the cabinet 1, and the other end is contacted to the lead screw 602, in order to ensure the stable rotation of the lead screw 602, the rotating sleeve 503 is arranged, which saves the space utilization and also has the effect of stabilizing the rotation of the lead screw 602.

[0040] In the embodiment, the buckle mechanism 7 comprises several linear modules 701, the number of the linear modules 701 is equal to the number of one row of the ultraviolet lamp tubes 801, the guide block on the linear module 701 is fixedly connected with the sliding block 703, the sliding block 703 is provided with the electric motor 708, the output shaft of the electric motor 708 is fixedly connected with the supporting rod 707, the end of the supporting rod 707 is fixedly connected with the buckle body 705, the two ends of each ultraviolet lamp tube 801 are fixedly connected with the first side plate 802 and the second side plate 806 respectively, the first side plate 802 is close to one end of the linear module 701, the first side plate 802 is fixedly connected with the arc-shaped slide rail support 704, when the side wall of the sliding block 703 is close to the arc-shaped slide rail support 704, the electric motor 708 drives the supporting rod 707 to rotate to the arc-shaped slide rail support 704 direction, the buckle body 705 slides to the inner side of the arc-shaped slide rail support 704, the buckle body 705 is clamped on the arc-shaped slide rail support 704, when the sliding block 703 is close to the arc-shaped slide rail support 704, the supporting rod 707 is rotated, the buckle body 705 is directly clamped on the arc-shaped slide rail support 704, if the sliding block 703 is pulled to slide, the ultraviolet lamp tube 801 can be directly moved, the ultraviolet lamp tube 801 is conveniently butt-jointed and fixed, the efficiency of the ultraviolet lamp tube 801 moving, taking out and fixing is improved, and the operation is convenient.

[0041] In the embodiment, the screw rod transmission mechanism 6 further has a sliding rod 601, one side of the linear module 701 is fixedly connected with the screw rod sleeve 702, the screw rod sleeve 702 is provided with a screw hole and a sliding hole, the screw hole is engagedly connected with the screw rod 602, and the sliding hole is slidably connected with the sliding rod 601. In the embodiment, the adjacent linear modules 701 are fixedly connected with the connecting rod 706; each second side plate 806 is provided with the transmission part 804, the transmission part 804 is a rotating rod with two flywheels, the chain 805 is drivingly connected between the two flywheels located on the same horizontal line and adjacent to each other, the cabinet 1 is further provided with a plurality of notches 103, each notch 103 is clamped with the corresponding second side plate 806, the adjacent first side plates 802 are fixedly provided with the connecting plate 803, the transmission mode of the flywheel and the chain 805 is that the air in the cabinet 1 is relatively humid, if the air stays in the cabinet 1 for a long time, the moisture in the air will condense on the transmission part 804, and the chain 805 is made of stainless steel alloy material, so that the humid environment in the cabinet 1 can be overcome, when the cabinet 1 is used normally, the second side plate 806 is clamped with the notch 103, and the chain is accommodated in the shell 102, so that the chain is protected from being in contact with hot air for a long time, and the service life of the chain is improved.

[0042] In the embodiment, the driving mechanism 9 comprises a first gear 901, a first motor 902, a bottom plate 904 and a second motor 905, the bottom plate 904 is fixed below the shell of the linear module 701, the second motor 905 is installed on the bottom plate 904, the output shaft of the second motor 905 is fixedly connected with a curved rod 903, the end of the curved rod 903 is fixedly connected with the first motor 902, the output shaft of the first motor 902 is fixedly connected with the first gear 901, the end of the rotating rod close to the first gear 901 is fixedly connected with a second gear 807, the first gear 901 and the second gear 807 are meshingly connected with each other.

[0043] In the embodiment, the rear side of the case 1 is fixedly connected with a shell 102, the flywheel outside is accommodated, the sidewall of the case 1 is further provided with an electric door 104, the electric door 104 is provided with a door plate 105, when the case 1 works, the door plate 105 is closed to separate the case 1 from the cleaning box 2, a plurality of clamping grooves 106 are formed in the inner wall of the door plate 105, the clamping grooves 106 are clamped with the arc-shaped slide rail bracket 704, the notches 103 and the clamping grooves 106 are respectively fixed on the two sides of the ultraviolet lamp tube 801, when the hot gas is contacted, the stability of the ultraviolet lamp tube 801 is maintained, the efficiency of the purification hot gas is maintained, during the cleaning of the ultraviolet lamp tube 801, the door plate 105 is retracted, the notch 103 on one side of the ultraviolet lamp tube 801 fixes the ultraviolet lamp tube 801, the ultraviolet lamp tube 801 is prevented from falling, the ultraviolet lamp tube 801 is arranged in the clamping groove fixed mode, which is convenient for taking out at any time for cleaning, the corresponding ultraviolet lamp tube 801 can be directly taken out from the maintenance door 201 on the top of the cleaning box 2 for maintenance, which replaces the traditional bolt clamping fixed mode and is convenient to use.

[0044] In the embodiment, the upper part of the cleaning box 2 is provided with a maintenance door 201, the sidewall of the cleaning box 2 is provided with a ventilation hole 202; the cleaning component comprises a plurality of storage barrels 3, a mounting plate 4 and a plurality of high-pressure nozzles 401, each storage barrel 3 respectively stores a cleaning liquid and is provided with a connector 402 at the end, each high-pressure nozzle 401 is communicated with a main pipeline, another connector 402 is communicated on the main pipeline, and the connectors 402 on the storage barrels 3 and the connectors on the main pipeline are communicated through a hose.

[0045] Working principle: the filtering component is a plurality of activated carbon plates, the hot gas discharged by the fan enters from the port 101, first passes through the activated carbon plates to filter the impurities contained in the hot gas, and then passes through the ultraviolet lamp tube 801 for photocatalysis.

[0046] When the lamp cover 801 needs to be cleaned, the electric door 104 retracts the door plate 105 to the inside, connecting the inside of the cabinet 1 and the cleaning box 2, at this time the buckle mechanism 7 from bottom to top clamps each row of ultraviolet lamp tubes 801, and through the linear module 701, the ultraviolet lamp tubes 801 are pulled into the cleaning box 2, the storage barrel 3 has cleaning agent, the high-pressure nozzle 401 sprays the cleaning agent on the surface of the lamp cover of the ultraviolet lamp tube 801, and the ultraviolet lamp tube 801 is pulled into the original position after cleaning, so that the first side plate 802 is clamped into the notch 103, and the lead screw transmission mechanism 6 changes the height of the linear module 701 to clean the next group of ultraviolet lamp tubes 801, until all the ultraviolet lamp tubes 801 are cleaned. Through the above cleaning method, each ultraviolet lamp tube 801 can be cleaned inside the cleaning box 2, solving the problem that the cleaning device is arranged in the device in the background art, which affects the use of the internal space of the cabinet and also affects and reduces the air purification efficiency. If the cleaning device is installed outside the device, the lamp cover is removed as a whole for cleaning, due to the array distribution of the lamp cover, the lamp cover in the middle is located in the cleaning dead angle, and it is difficult to ensure that each lamp cover can be cleaned in place.

[0047] After cleaning, the door plate 105 is arranged on the passage between the cabinet 1 and the cleaning box 2, realizing the separation between the cabinet 1 and the cleaning box 2, and the first side plate 802 is also blocked on the notch 103 of the side wall of the cabinet 1. The ports 101 at both ends of the cabinet 1 are connected with ventilation pipes, so that the cabinet 1 is in a closed state on both sides when purifying hot air, preventing the loss of hot air, and the notch 103 and the clamping groove 106 fix the two sides of the ultraviolet lamp tube 801 respectively, maintaining the stability of the ultraviolet lamp tube 801 when contacting hot air, maintaining the efficiency of purifying hot air. During the cleaning of the ultraviolet lamp tube 801, the door plate 105 is retracted, the notch 103 on one side of the ultraviolet lamp tube 801 fixes the ultraviolet lamp tube 801 to prevent it from falling off. The ultraviolet lamp tube 801 is arranged in the clamping groove in a fixed manner, which is convenient for taking out for cleaning at any time. The corresponding ultraviolet lamp tube 801 can also be directly taken out through the maintenance door 201 above the cleaning box 2 for maintenance, instead of the traditional bolt clamp fixing method, which is convenient to use.

[0048] When the high-pressure flushing is performed on the ultraviolet lamp 801, the first gear 901 can be rotated by the second motor 905, so that the first gear 901 and the second gear 807 are engaged, thereby driving the transmission between the flywheel and the chain 805. As can be seen, the rotating rod of the flywheel penetrates into the lampshade of the ultraviolet lamp 801, and the lampshade of the ultraviolet lamp 801 is rotationally connected to the lamp holder. Therefore, when the rotating rod rotates, the lampshade of the ultraviolet lamp 801 also rotates synchronously. Therefore, the second motor 905 can drive the lampshade of the ultraviolet lamp 801 fixed on the linear module 701 to rotate synchronously, so that the lampshade of the ultraviolet lamp 801 can be rotatably contacted with the high-pressure water flow for cleaning without dead angle, thereby ensuring the cleaning quality. After the cleaning is completed, the lead screw transmission mechanism 6 makes the rotating lampshade of the ultraviolet lamp 801 contact the sponge pad body 502 above to wipe off the water, and then returns to the original position. In this way, the lampshade of the ultraviolet lamp 801 can be cleaned without dead angle, and at the same time, the lampshade of the ultraviolet lamp 801 can be directly put into the light catalysis process after the cleaning is completed, so that the process of removing water from the lampshade is omitted, and the use efficiency of the equipment is improved.

[0049] It will be obvious to a person skilled in the art that, without departing from the spirit or essential characteristics of the application, the present application can be implemented in other specific forms. The present examples are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the description given above, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims

1. A photocatalytic air purifier for the return air section of a fan coil unit, comprising a chassis, wherein the chassis has ventilation ports on both sides, and a filter component and a purification component are disposed inside the chassis, characterized in that: The filtering component is a plurality of activated carbon plates arranged equidistantly in the machine box, the purifying component comprises a light purifying mechanism and a buckle mechanism, the machine box is further provided with a cleaning box, the cleaning box is communicated with the machine box, the light purifying mechanism is arranged in the machine box, the buckle mechanism is arranged in the cleaning box, the buckle mechanism is further provided with a cleaning component on the side, a sponge pad mechanism is further arranged above the buckle mechanism, a lead screw transmission machine is further arranged in the cleaning box, the lead screw transmission machine drives the buckle mechanism to move up and down reciprocatingly, and a driving mechanism is further arranged on the buckle mechanism. The light purifying mechanism comprises a plurality of ultraviolet lamp tubes, each of the ultraviolet lamp tubes is arranged in a matrix in the machine box, and each of the ultraviolet lamp tubes is movably arranged in the machine box, the buckle mechanism sequentially pulls each row of ultraviolet lamp tubes into the cleaning box, the cleaning component performs high-pressure spray cleaning on the ultraviolet lamp tubes, the lead screw transmission machine contacts the ultraviolet lamp tubes to the sponge pad mechanism, and the driving mechanism drives the ultraviolet lamp tubes to rotate to wipe off water stains on the ultraviolet lamp tubes. The buckle mechanism comprises a plurality of linear modules, the number of the linear modules is equal to the number of one row of ultraviolet lamp tubes, a guide block on the linear module is fixedly connected with a sliding block, the sliding block is provided with an electric motor, an output shaft of the electric motor is fixedly connected with a supporting rod, and the end of the supporting rod is fixedly connected with a buckle body. Two ends of each of the ultraviolet lamp tubes are fixedly connected with a first side plate and a second side plate, the first side plate is close to one end of the linear module, the first side plate is fixedly connected with an arc-shaped slide rail support, when the side wall of the sliding block is close to the arc-shaped slide rail support, the electric motor drives the supporting rod to rotate towards the arc-shaped slide rail support, the buckle body slides to the inner side of the arc-shaped slide rail support, and the buckle body is clamped on the arc-shaped slide rail support. The lead screw transmission machine further comprises a sliding rod, one side of the linear module is fixedly connected with a lead screw sleeve, the lead screw sleeve is provided with a screw hole and a sliding hole, the screw hole is engagedly connected with a lead screw, and the sliding hole is slidably connected with the sliding rod.

2. The photocatalytic purifier for return air section of fan-coil according to claim 1, characterized in that: The sponge pad mechanism comprises a fixed support and a sponge pad body, one side of the fixed support is provided with a rotating sleeve, the rotating sleeve is rotatably arranged on the lead screw of the lead screw transmission machine, the fixed support is provided with a groove, the sponge pad body is clamped on the groove and is fixedly screwed by bolts.

3. The photocatalytic purifier for return air section of fan-coil according to claim 2, characterized in that: Adjacent linear modules are fixedly connected with connecting rods. The second side plate is provided with a transmission part, the transmission part is a rotating rod with two flywheels, a chain is drivingly connected between two flywheels located on the same horizontal line and adjacent to each other, the machine box is further provided with a plurality of notches, each notch is matched with the corresponding second side plate to be clamped, and adjacent first side plates are fixedly provided with connecting plates.

4. The photocatalytic purifier for return air section of fan-coil according to claim 3, characterized in that: The driving mechanism comprises a first gear, a first motor, a bottom plate and a second motor, the bottom plate is fixed below the linear module shell, the second motor is installed on the bottom plate, the output shaft of the second motor is fixedly connected with a curved rod, the end of the curved rod is fixedly connected with the first motor, the output shaft of the first motor is fixedly connected with the first gear, the end of the rotating rod close to the first gear is fixedly connected with a second gear, and the first gear and the second gear are meshingly connected.

5. The photocatalytic purifier for return air section of fan-coil according to claim 4, characterized in that: The rear side of the cabinet is fixedly connected with a shell, and the flywheel outside is accommodated.

6. The photocatalytic purifier for return air section of fan-coil according to claim 5, characterized in that: The sidewall of the cabinet is also provided with an electric door, the electric door is provided with a door plate, when the cabinet works, the door plate is closed to separate the cabinet from the cleaning box, a plurality of clamping grooves are formed in the inner wall of the door plate, and the clamping grooves and the arc-shaped slide rail support are clamped.

7. The photocatalytic purifier for return air section of fan-coil according to claim 1, characterized in that: A maintenance door is arranged on the upper part of the cleaning box, and a ventilation hole is formed in the sidewall of the cleaning box; the cleaning part comprises a plurality of storage barrels, a mounting plate and a plurality of high-pressure nozzles, each storage barrel stores cleaning liquid and is provided with a connector at the end, each high-pressure nozzle is connected with a main pipeline, another connector is connected with the main pipeline, and the connector on the storage barrel and the connector on the main pipeline are connected through a hose.

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