CN210441339U - Central air conditioning fan coil pipe wind gap filter equipment - Google Patents

Abstract

The utility model discloses a central air conditioning fan coil pipe wind gap filter equipment, including fixing the angle chase that is located the wind channel air outlet outside on the roof, with the filtration casing of angle chase joint, install filter and dismouting pole in filtering the casing, it has ventilation chamber and two function chambeies to filter the casing, air intake and air exit have been opened respectively to ventilation chamber top and bottom, the air current of wind channel air outlet is discharged by the air exit after the air intake gets into the filter, the function intracavity is equipped with the locating piece, first spring, articulated seat, first pawl, the inner skleeve, a fixed base, the unblock piece, locking mechanical system, unlocking mechanism, gasbag lever mechanism. The utility model discloses a filter equipment installs additional in wind channel air outlet department, can filter the air that fan coil blew off, blocks up when leading to the air not to circulate in the wind channel, and wind channel pressure increases, and the gasbag expands and makes baffle and slider position change, through observing slider or baffle position, can judge whether the wind channel blocks up to in time clear up the filter.

Description

Central air conditioning fan coil pipe wind gap filter equipment

Technical Field

The utility model relates to a central air conditioning accessory field, especially a central air conditioning fan coil wind gap filter equipment.

Background

With the development of urban construction and the improvement of the living standard of people, the use of air conditioners is more and more common, in some areas with intensive personnel, a central air conditioning system is generally adopted for unified cooling and heating, a refrigerant or a heating medium is introduced into a fan coil of each room by a central air conditioning unit, and cold air or hot air is blown out by the fan coil after heat exchange.

Because the long-term temperature environment is kept in the air channel, a large number of bacteria can easily survive, the existing fan coil does not have an air filtering function, the quality of the air discharged by the fan coil is poor, the smell is heavy, the health of people is not facilitated, the dirty air seriously influences the health of people in areas with dense personnel, particularly hospitals, dust is easily accumulated in the air channel, the air outlet is blocked, the air exhaust amount is reduced, and a worker can not directly observe the air channel to be blocked, so that the fan coil can not be cleaned in time.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem and designing a central air conditioning fan coil wind gap filter equipment.

The technical scheme of the utility model is that the central air conditioning fan coil pipe air port filtering device comprises an angle iron frame fixed on the roof and positioned at the outer side of the air outlet of the air duct, a filtering shell detachably connected with the angle iron frame and a filter arranged in the filtering shell, wherein the filtering shell is clamped between the angle iron frames, two clapboards are arranged in the filtering shell and divide the filtering shell into a ventilating cavity positioned at the middle part and function cavities at two sides, the filter is arranged in the ventilating cavity, the top and the bottom of the ventilating cavity are respectively provided with an air inlet and an air outlet, the air flow at the air outlet of the air duct enters the filter through the air inlet and then is discharged through the air outlet, the two side walls of the filtering shell are respectively provided with a first opening and a second opening from top to bottom, the end surface of the angle iron frame facing the side wall of the filtering shell is provided with a first clamping groove and a second clamping groove respectively corresponding to the first opening and the second opening, an outer sleeve communicated with the functional cavity is vertically fixed at the bottom of the filtering shell, a positioning block, a first spring, a hinged seat, a first pawl, an inner sleeve, a fixed seat, an unlocking block and a locking mechanism are arranged in the functional cavity, the positioning block and the hinged seat are fixedly installed on the inner wall of the top end of the functional cavity, the first pawl is hinged with the hinged seat through a hinged shaft, one end of the first pawl is connected with the inner wall of the top end of the functional cavity through the first spring, the first spring is used for pushing the other end of the first pawl out of the first opening, the inner sleeve is fixedly connected with the side wall of the filtering shell through a connecting block, the inner sleeve and the outer sleeve are coaxial in the axial direction, the fixed seat is fixed on one side surface of the inner sleeve facing the second opening, the locking mechanism is installed in the second opening and selectively locked with the angle iron frame, and an unlocking mechanism is further arranged in the functional cavity and used for drawing the unlocking block out from between the locking mechanism and the fixed seat.

Preferably, the locking mechanism comprises a lock block body, a lock tongue, a movable head, a push rod, a second spring, a third spring, a first end cover and a second end cover, the lock block body is fixed in the second opening, a first end cover is fixed at one end of the lock block body facing the movable head, an installation groove is arranged in the movable head, a limiting piece and a second spring are arranged in the installation groove, one end of the second spring is connected with the movable head, the other end is connected with the limiting piece, a second end cover used for limiting the limit piece to move out of the mounting groove is fixed on the movable head, a channel for the bolt to stretch and move is arranged in the lock block body, one end of the push rod is connected with the lock tongue, the other end of the push rod passes through the second end cover to be connected with the second spring, the third spring is sleeved on the lock tongue, one end of the third spring is connected with the spring bolt, the other end of the third spring is connected with the lock block body, and the third spring is used for pressing the spring bolt in the lock block body.

Preferably, the unlocking mechanism comprises two guide rails, two baffle plates, two spring seats, guide rods, pull ropes, pull rope fixing blocks, tension springs, sliding blocks, second pawls and fourth springs, the two guide rails are oppositely fixed on the inner walls of the two sides of the function cavity, the baffle plates are movably clamped between the two guide rails to move along the guide rail tracks, the spring seats are fixed at the bottom of the function cavity, the two ends of each tension spring are respectively connected with the spring seats and the baffle plates, the pull rope fixing blocks are fixed at the connecting ends of the baffle plates and the tension springs, through holes are formed in the spring seats, a plurality of guide rods for guiding the pull ropes are fixed in the function cavity, one ends of the pull ropes and the other ends of the unlocking blocks are sequentially wound around the guide rods, penetrate through holes and are fixedly connected with the sliding blocks and then fixedly connected with the sliding blocks, sliding grooves are axially formed in the inner walls of the outer sleeves, and the sliding, one end of the sliding block, which is far away from the pull rope, is provided with an opening groove, one end of the second pawl is hinged in the opening groove through a pin shaft, the other end of the second pawl is connected with the sliding block through a fourth spring, and the fourth spring is used for pushing one end of the second pawl out of the opening groove.

Preferably, the air bag lever mechanism comprises a bottom plate, a vertical plate, an upper plate, a movable plate, a stop plate, an adjusting screw, a nut, a spring cap, a fifth spring, an air bag and an air guide tube, wherein the bottom plate is horizontally fixed on the inner wall of the function cavity and positioned above the guide rail, the vertical plate is vertically fixed at one end of the bottom plate, the air bag is installed at the other end of the bottom plate, one end of the air guide tube is communicated with the air bag, the other end of the air guide tube extends upwards into the air inlet, the movable plate is hinged to the middle part of the vertical plate, the other end of the movable plate is lapped on the air bag, the upper plate is horizontally fixed at the upper end of the vertical plate, the nut is fixed on the upper plate, the adjusting screw is in threaded connection with the nut, the lower end of the adjusting screw penetrates through the upper plate and is fixedly connected with the spring cap, and a stop plate is fixed at the lower end of the movable plate, and the lower end of the stop plate selectively passes through the third opening to be clamped with the stirring block.

Preferably, the detachable rod is further included, two column heads capable of extending into the outer sleeve and the inner sleeve are symmetrically arranged at the top end of the detachable rod, and a limiting groove matched with the second pawl is formed in each column head.

Preferably, when the stop plate is clamped with the stirring block, the baffle is positioned right above the outer sleeve.

Preferably, the end face of the lock tongue, which faces away from the push rod, is an inclined plane.

Preferably, the end faces of the movable head and the fixed seat which face each other are arc faces, and two ends of the unlocking block are movably clamped between the arc faces of the movable head and the fixed seat.

Preferably, the filter is an activated carbon air filter.

The utility model has the advantages that:

1. the air outlet is additionally provided with the filter device, so that air blown out of the fan coil can be filtered, peculiar smell, dust and harmful gas in the air can be removed, and the breathing health of people can be ensured;

2. the device is convenient to disassemble and assemble, can be quickly assembled or disassembled through the disassembling and assembling rod, and is simple to operate;

3. when the wind channel blocks up and leads to the air not to circulate, wind channel pressure increases, and the air of bulging increases the back volume increase in the gasbag to make the check plate lift up, the outer sleeve is kept away from to the baffle under the extension spring pulling force effect, and the slider rises into in the outer sleeve, through observing slider or baffle position, whether the staff can judge the wind channel and block up, thereby in time dismantle and filter the casing, clear up the filter, prevent piling up of dust and breeding of bacterium.

Drawings

Fig. 1 is a schematic structural view of a central air-conditioning fan coil air port filtering device of the present invention;

FIG. 2 is a schematic side view of the central air conditioning fan coil tuyere stock filtration device of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 1 at A;

FIG. 4 is an enlarged view of a portion of FIG. 1 at B;

FIG. 5 is an enlarged view of a portion of FIG. 1 at C;

FIG. 6 is an enlarged view of a portion of FIG. 2 at D;

FIG. 7 is an enlarged view of a portion of FIG. 2 at E;

FIG. 8 is an enlarged view of a portion of FIG. 2 at F;

fig. 9 is a schematic structural view of the locking mechanism of the present invention when the unlocking block is installed;

fig. 10 is a partial schematic view of the locking mechanism of the present invention;

FIG. 11 is a schematic view of the connection structure of the outer sleeve and the sliding block of the present invention;

fig. 12 is a schematic structural view of the filter housing of the present invention when the unlocking block is installed;

FIG. 13 is a schematic view of the structure of the central air-conditioning fan coil tuyere filtering device of the present invention connected to a dismounting rod;

figure 14 is a front view of the utility model disassembly bar;

figure 15 is a side view of the utility model disassembly bar;

in the figure, 1, a roof; 2. an air outlet of the air duct; 3. a corner iron frame; 4. a filter housing; 5. a filter; 6. a partition plate; 7. a ventilation cavity; 8. a functional cavity; 9. an air inlet; 10. an air outlet; 11. a first opening; 12. a second opening; 13. a first card slot; 14. a second card slot; 15. an outer sleeve; 16. positioning blocks; 17. a first spring; 18. a hinged seat; 19. a first pawl; 20. an inner sleeve; 21. a fixed seat; 22. unlocking the block; 23. connecting blocks; 24. a lock block body; 25. a latch bolt; 26. moving the head; 27. a push rod; 28. a second spring; 29. a third spring; 30. a first end cap; 31. a second end cap; 32. mounting grooves; 33. a limiting sheet; 34. a guide rail; 35. a baffle plate; 36. a spring seat; 37. a guide bar; 38. pulling a rope; 39. a pull rope fixing block; 40. a tension spring; 41. a slider; 42. a second pawl; 43. a fourth spring; 44. a chute; 45. a notch groove; 46. a base plate; 47. a vertical plate; 48. an upper plate; 49. a movable plate; 50. a stopper plate; 51. adjusting the screw; 52. a nut; 53. a spring cap; 54. a fifth spring; 55. an air bag; 56. an air duct; 57. a third opening; 58. stirring blocks; 59. disassembling and assembling the rod; 60. a column cap; 61. a limiting groove.

Detailed Description

The invention is described in detail below with reference to the accompanying drawings, as shown in fig. 1-15: the angle iron frame 3 is fixedly installed on the roof 1 through bolts and is positioned outside the air duct air outlet 2, the filtering shell 4 is clamped between the angle iron frames 3, the filter 5 is installed in the filtering shell 4, two partition plates 6 are arranged in the filtering shell 4, the filtering shell 4 is divided into a ventilating cavity 7 positioned in the middle and function cavities 8 positioned at two sides by the two partition plates 6, the top of the filtering shell 4, namely the top plate of the function cavity 8 is a detachable top plate, the filtering shell 4 is installed in front of the angle iron frame 3 after the filter 5 is cleaned, the locking block body 24 is clamped between the movable head 26 and the fixed seat 21 again through the detaching the top plate, the filter 5 is installed in the ventilating cavity 7, the top and the bottom of the ventilating cavity 7 are respectively provided with an air inlet 9 and an air outlet 10, the air flow of the air duct air outlet 2 enters the filter 5 through the air inlet 9 and then is discharged through the air outlet 10, the first opening 11 and the second, the end face of the angle iron frame 3 facing the side wall of the filtering shell 4 is provided with a first clamping groove 13 and a second clamping groove 14 which are respectively corresponding to the first opening 11 and the second opening 12, the bottom of the filtering shell 4 is vertically fixed with an outer sleeve 15 communicated with the function cavity 8, the function cavity 8 is internally provided with a positioning block 16, a first spring 17, a hinge seat 18, a first pawl 19, an inner sleeve 20, a fixed seat 21, an unlocking block 22 and a locking mechanism, the positioning block 16 and the hinge seat 18 are fixedly arranged on the inner wall at the top end of the function cavity 8, the first pawl 19 is hinged with the hinge seat 18 through a hinge shaft, one end of the first pawl 19 is connected with the inner wall at the top end of the function cavity 8 through the first spring 17, the first spring 17 is used for pushing the other end of the first pawl 19 out of the first opening 11, the inner sleeve 20 is fixedly connected with the side wall of the filtering shell 4 through a connecting block 23, the inner sleeve 20 is axially coaxial, the locking mechanism is arranged in the second opening 12 and selectively locked with the angle iron frame 3, the unlocking block 22 is movably clamped between the locking mechanism and the fixed seat 21, and the unlocking mechanism is further arranged in the function cavity 8 and used for drawing the unlocking block 22 out of the space between the locking mechanism and the fixed seat 21.

The locking mechanism comprises a lock block body 24, a lock tongue 25, a movable head 26 and a push rod 27, second spring 28, third spring 29, first end cover 30 and second end cover 31, lock block body 24 is fixed in second opening 12, lock block body 24 is fixed with first end cover 30 towards the one end of loose head 26, be equipped with mounting groove 32 in the loose head 26, be equipped with spacing piece 33 and second spring 28 in the mounting groove 32, second spring 28 one end is connected the other end with loose head 26 and is connected with spacing piece 33, be fixed with the second end cover 31 that is used for restricting spacing piece 33 to move out mounting groove 32 on the loose head 26, the internal passageway that has the flexible activity of messenger's spring bolt 25 that has of lock block, push rod 27 one end is connected the other end with spring bolt 25 and is connected with second spring 28 through passing second end cover 31, third spring 29 overlaps on spring bolt 25, third spring 29 one end is connected the other end with spring bolt 25 and is connected with lock block body 24, third spring 29 is used for compressing tightly spring bolt 25 in lock block body 24.

The unlocking mechanism comprises guide rails 34, a baffle 35, two guide rails 36, guide rods 37, a pull rope 38, a pull rope fixing block 39, a tension spring 40, a slide block 41, a second pawl 42 and a fourth spring 43, the number of the guide rails 34 is two, the two guide rails 34 are oppositely fixed on the inner walls of the two sides of the function cavity 8, the baffle 35 is movably clamped between the two guide rails 34 and moves along the track of the guide rails 34, the spring seat 36 is fixed at the bottom of the function cavity 8, the two ends of the tension spring 40 are respectively connected with the spring seat 36 and the baffle 35, the pull rope fixing block 39 is fixed at the connecting end of the baffle 35 and the tension spring 40, a through hole is formed in the spring seat 36, a plurality of guide rods 37 for guiding the pull rope 38 are fixed in the function cavity 8, one end of the pull rope 38 is fixedly connected with the unlocking block 22, the other end of the pull rope sequentially bypasses the guide rods 37 and passes, the slide block 41 is movably clamped in the slide groove 44 and moves along the track of the slide groove 44, one end of the slide block 41, which is far away from the pull rope 38, is provided with a notch groove 45, one end of the second pawl 42 is hinged in the notch groove 45 through a pin shaft, the other end of the second pawl 42 is connected with the slide block 41 through a fourth spring 43, and the fourth spring 43 is used for pushing one end of the second pawl 42 out of the notch groove 45.

The air bag 55 lever mechanism comprises a bottom plate 46, a vertical plate 47, an upper plate 48, a movable plate 49, a stop plate 50, an adjusting screw 51, a nut 52, a spring cap 53, a fifth spring 54, an air bag 55 and an air duct 56, wherein the bottom plate 46 is horizontally fixed on the inner wall of the function cavity 8 and positioned above the guide rail 34, the vertical plate 47 is vertically fixed at one end of the bottom plate 46, the air bag 55 is installed at the other end of the bottom plate 46, one end of the air duct 56 is communicated with the air bag 55, the other end of the air duct extends upwards into the air inlet 9, the movable plate 49 is hinged at the middle part of the vertical plate 47, the other end of the movable plate 49 is lapped on the air bag 55, the upper plate 48 is horizontally fixed at the upper end of the vertical plate 47, the nut 52 is fixed on the upper plate 48, the adjusting screw 51 is in threaded connection with the nut 52, the lower end of the adjusting screw passes through the upper plate 48 and, the movable plate 49 has a stopper plate 50 fixed to a lower end thereof, and the stopper plate 50 selectively passes through the third opening 57 to be engaged with the stirring block 58.

The top end of the dismounting rod 59 is symmetrically provided with two column heads 60 which can extend into the outer sleeve 15 and the inner sleeve 20, and the column heads 60 are provided with limiting grooves 61 which are matched with the second pawls 42.

When the stop plate 50 is engaged with the stirring block 58, the baffle 35 is located right above the outer sleeve 15, and in this case, the baffle 35 blocks the passage between the outer sleeve 15 and the inner sleeve 20 in a normal installation and use state, so that the filter housing 4 cannot be detached through the detaching rod 59.

The end surface of the bolt 25 facing away from the push rod 27 is an inclined surface, so that the bolt can be pressed back into the lock block body 24 when contacting with the angle iron frame 3.

The opposite end surfaces of the movable head 26 and the fixed seat 21 are both arc surfaces, and the two ends of the unlocking block 22 are movably clamped between the movable head 26 and the arc surfaces of the fixed seat 21.

The filter 5 is an activated carbon air filter 5 for removing the peculiar smell and the harmful gas in the air.

The working principle of the embodiment is as follows: when the device is in an initial state, two ends of the unlocking block 22 are clamped between the movable head 26 and the cambered surface of the fixed seat 21, when the device is installed, the angle iron frame 3 is fixed on the outer side of the air duct air outlet 2 of the roof 1 through bolts, the fan coil is positioned in the air duct air outlet 2 and blows air downwards, then two column heads 60 of the dismounting rod 59 are respectively pushed into the two outer sleeves 15, the column heads 60 are contacted with the first pawl 19 after passing through the outer sleeves 15 and the inner sleeves 20, and the first pawl 19 is propped against the positioning block 16, at the moment, the first spring 17 is compressed under the force, the first pawl 19 is completely contained in the functional cavity 8, then the dismounting rod 59 is supported, the filtering shell 4 is pushed into the angle iron frame 3, the movable head 26 is contacted with the angle iron frame 3 and then is compressed under the force in the locking block body 24, the second spring 28 and the third spring 29 are compressed under the force, and when the top of the filtering shell 4 is contacted with the inner wall at the top end of the angle iron frame 3, the lock, thereby, the filter housing 4 is clamped with the hinge, the dismounting rod 59 is pulled out afterwards, after the dismounting rod 59 is separated from the first pawl 19, one end of the first pawl 19 extends from the first opening 11 to the first clamping groove 13 under the thrust action of the first spring 17, the filter housing 4 is clamped with the angle iron frame 3 as the function of the lock tongue 25, in the process of pulling out the dismounting rod 59, the column head 60 is contacted with the second pawl 42, the limiting groove 61 blocks the second pawl 42, the dismounting rod 59 pulls the slide block 41 to descend by pulling down the dismounting rod 59, the slide block 41 descends stably in the sliding groove 44, the slide block 41 drives the baffle 35 and the unlocking block 22 to move through the pull rope 38, the baffle 35 slides between the guide rails 34, the tension spring 40 is pulled by force, the guide rod 37 plays a guiding role for the pull rope 38, one end of the pull rope 38 and the other end of the unlocking block 22 sequentially bypass the guide rod 37, pass through the through hole of the spring seat 36, are fixedly connected with the pull rope fixing block, when the stirring block 58 moves to the side of the stop plate 50 facing the air bag 55, the lower end of the sliding block 41 is moved out of the outer sleeve 15, the unlocking block 22 is pulled by the tension rope 38 and is separated from the fixed seat 21 and the movable head 26, the baffle 35 is positioned above the outer sleeve 15, the baffle 35 separates passages of the outer sleeve 15 and the inner sleeve 20, then the dismounting and mounting rod 59 is horizontally moved out, the air bag 55 does not reach the height for tilting the movable plate 49, and the stop plate 50 automatically clamps the stirring block 58, so that the baffle 35 is kept fixed;

after the unlocking block 22 is separated from the fixed seat 21 and the movable head 26, the bolt 25 is pushed into the locking block body 24 under the action of the elastic force of the third spring 29, and the first pawl 19 realizes the clamping connection between the filter shell 4 and the angle iron frame 3; after the filter 5 is blocked, the pressure difference between the air outlet 2 of the air duct and the functional cavity 8 is increased, the air pressure at the air outlet 2 of the air duct is increased, and the air entering the air bag 55 through the air duct 56 is increased, so that the volume of the air bag 55 is slightly increased, the volume and the height of the air bag 55 are increased, and one end of the movable plate 49 is pushed to tilt, the fifth spring 54 is stressed and compressed, the movable plate 49 drives the stop plate 50 to lift up, so that the stop plate 50 is separated from the stirring block 58, under the pulling force of the tension spring 40, the baffle 35 is far away from the outer sleeve 15, the channel between the outer sleeve 15 and the inner sleeve 20 is not blocked, and meanwhile, the baffle 35 drives; by screwing the adjusting screw 51, the adjusting screw 51 is rotated in the nut 52 to ascend or descend, thereby adjusting the pressure of the fifth spring 54 on the movable plate 49;

the worker can judge whether the air duct is blocked or not by observing the position of the sliding block 41 or the baffle 35, and whether the filter 5 needs to be cleaned or not, so that the filter shell 4 is timely disassembled, the filter 5 is cleaned, the accumulation of dust and the breeding of bacteria are prevented, when the filter shell 4 is disassembled, the column cap 60 at the top of the disassembling and assembling rod 59 is enabled to support one end of the first pawl 19 on the positioning block 16, the filter shell 4 and the angle iron frame 3 are not clamped after the first pawl 19 is separated from the first clamping groove 13, the disassembling and assembling rod 59 is moved downwards, and the filter shell 4 is enabled to gradually separate from the angle iron frame 3 under the action of gravity; the roof of function chamber 8 is the detachable roof, and the roof passes through the screw installation on filtering shell 4 lateral wall, and after clearance filter 5, dismantles the roof, lifts portable board 49 on, makes baffle 35 reset, clamps lock block body 24 again between loose head 26 and fixing base 21 afterwards, installs the roof at last, alright install filtering shell 4 again between angle chase 3.

Above-mentioned technical scheme has only embodied the utility model discloses technical scheme's preferred technical scheme, some changes that this technical field's technical personnel probably made to some parts wherein have all embodied the utility model discloses a principle belongs to within the protection scope of the utility model.

Claims (9)

1. A central air conditioning fan coil pipe wind gap filter equipment, including fix on roof (1) lie in wind channel air outlet (2) outside angle chase (3), with angle chase (3) can dismantle the filter casing (4) of being connected and install filter (5) in filtering casing (4), characterized by that, filter casing (4) clamp in angle chase (3) within a definite time, be equipped with two baffles (6) in filtering casing (4), two baffle (6) will filter casing (4) and separate into the ventilation chamber (7) that lie in the middle part and function chamber (8) of both sides, filter (5) are installed in ventilation chamber (7), air intake (9) and air exit (10) have been opened respectively to ventilation chamber (7) top and bottom, the air current of wind channel air outlet (2) is discharged by air exit (10) after air intake (9) got into filter (5), the filter shell (4) two side walls are sequentially provided with a first opening (11) and a second opening (12) from top to bottom, the angle iron frame (3) is provided with a first clamping groove (13) and a second clamping groove (14) which respectively correspond to the first opening (11) and the second opening (12) towards the end surface of the filter shell (4) side wall, the bottom of the filter shell (4) is vertically fixed with an outer sleeve (15) communicated with the function cavity (8), a positioning block (16), a first spring (17), a hinged seat (18), a first pawl (19), an inner sleeve (20), a fixed seat (21), an unlocking block (22) and a locking mechanism are arranged in the function cavity (8), the positioning block (16) and the hinged seat (18) are fixedly arranged on the inner wall at the top end of the function cavity (8), the first pawl (19) is hinged with the hinged seat (18) through a hinged shaft, one end of the first pawl (19) is connected with the inner wall at the top end of the function cavity (8) through the first spring (17), first spring (17) are used for promoting first opening (11) with first pawl (19) other end, inner skleeve (20) pass through connecting block (23) and filter casing (4) lateral wall fixed connection, inner skleeve (20) and outer sleeve (15) axial are coaxial, inner skleeve (20) are fixed with fixing base (21) on the side of second opening (12) towards, locking mechanical system installs selectively with angle chase (3) closure in second opening (12), unlocking piece (22) activity card dress is between locking mechanical system and fixing base (21), still be equipped with unlocking mechanism in function chamber (8), unlocking mechanism is used for taking unlocking piece (22) from locking mechanical system and fixing base (21) within a definite time.

2. The air outlet filtering device of the coil pipe of the central air conditioning fan as claimed in claim 1, wherein the locking mechanism comprises a locking block body (24), a locking tongue (25), a movable head (26), a push rod (27), a second spring (28), a third spring (29), a first end cover (30) and a second end cover (31), the locking block body (24) is fixed in the second opening (12), the first end cover (30) is fixed at one end of the locking block body (24) facing the movable head (26), a mounting groove (32) is arranged in the movable head (26), a limiting piece (33) and the second spring (28) are arranged in the mounting groove (32), one end of the second spring (28) is connected with the movable head (26) and the other end is connected with the limiting piece (33), the second end cover (31) for limiting the limiting piece (33) to move out of the mounting groove (32) is fixed on the movable head (26), the lock is characterized in that a channel for enabling the lock bolt (25) to stretch and move is arranged in the lock block body (24), one end of the push rod (27) is connected with the lock bolt (25) and the other end of the push rod passes through the second end cover (31) to be connected with the second spring (28), the third spring (29) is sleeved on the lock bolt (25), one end of the third spring (29) is connected with the lock bolt (25) and the other end of the third spring is connected with the lock block body (24), and the third spring (29) is used for pressing the lock bolt (25) in the lock block body (24).

3. The central air-conditioning fan coil air port filtering device as claimed in claim 2, wherein the unlocking mechanism comprises two guide rails (34), two baffles (35), two spring seats (36), a guide rod (37), a pull rope (38), a pull rope fixing block (39), a tension spring (40), a slider (41), a second pawl (42) and a fourth spring (43), the two guide rails (34) are oppositely fixed on the inner walls of two sides of the functional cavity (8), the baffle (35) is movably clamped between the two guide rails (34) and moves along the track of the guide rails (34), the spring seats (36) are fixed at the bottom of the functional cavity (8), two ends of the tension spring (40) are respectively connected with the spring seats (36) and the baffles (35), the pull rope fixing block (39) is fixed at the connecting end of the baffles (35) and the tension spring (40), the spring seat (36) is provided with a through hole, a plurality of guide rods (37) for guiding the pull rope (38) are fixed in the function cavity (8), one end of the pull rope (38) is fixedly connected with the unlocking block (22), the other end of the pull rope sequentially bypasses the guide rod (37), passes through the through hole, is fixedly connected with the pull rope fixing block (39) and then is fixedly connected with the sliding block (41), the inner wall of the outer sleeve (15) is axially provided with a sliding groove (44), the sliding block (41) is movably clamped in the sliding groove (44) and moves along the track of the sliding groove (44), one end of the sliding block (41) far away from the pull rope (38) is provided with a notch groove (45), one end of the second pawl (42) is hinged in the notch groove (45) through a pin shaft, the other end of the second pawl (42) is connected with the sliding block (41) through a fourth spring (43), the fourth spring (43) is used for pushing one end of the second pawl (42) out of the notch groove (45).

4. The air outlet filtering device of the coil pipe of the central air-conditioning fan as claimed in claim 3, further comprising an air bag (55) lever mechanism, wherein the air bag (55) lever mechanism comprises a bottom plate (46), a vertical plate (47), an upper plate (48), a movable plate (49), a stop plate (50), an adjusting screw (51), a nut (52), a spring cap (53), a fifth spring (54), an air bag (55) and an air duct (56), the bottom plate (46) is horizontally fixed on the inner wall of the functional cavity (8) and located above the guide rail (34), the vertical plate (47) is vertically fixed at one end of the bottom plate (46), the air bag (55) is installed at the other end of the bottom plate (46), one end of the air duct (56) is communicated with the air bag (55), the other end of the air duct extends upwards into the air inlet (9), the movable plate (49) is hinged at the middle part of the vertical plate (47), and the, an upper plate (48) is horizontally fixed at the upper end of the vertical plate (47), a nut (52) is fixed on the upper plate (48), an adjusting screw (51) is in threaded connection with the nut (52), the lower end of the adjusting screw penetrates through the upper plate (48) and is fixedly connected with a spring cap (53), the two ends of a fifth spring (54) are respectively fixedly connected with the spring cap (53) and a movable plate (49), a third opening (57) is formed in the bottom plate (46), a stirring block (58) is fixed at the upper end of the connecting end of the baffle plate (35) and the tension spring (40), a stop plate (50) is fixed at the lower end of the movable plate (49), and the lower end of the stop plate (50) selectively penetrates through the third opening (57) and is clamped with the stirring block (58).

5. The air outlet filtering device of the coil pipe of the central air-conditioning fan as claimed in claim 4, further comprising a disassembling rod (59), wherein two column heads (60) capable of extending into the outer sleeve (15) and the inner sleeve (20) are symmetrically arranged at the top end of the disassembling rod (59), and a limiting groove (61) matched with the second pawl (42) is formed in each column head (60).

6. A filter device for coil openings of a central air-conditioning fan according to claim 5, characterized in that when the stop plate (50) is engaged with the stirring block (58), the baffle (35) is positioned right above the outer sleeve (15).

7. The central air-conditioning fan coil air port filter device as claimed in claim 2, wherein the end face of the latch (25) facing away from the push rod (27) is an inclined surface.

8. The central air-conditioning fan coil air port filtering device as claimed in claim 2, wherein the end faces of the movable head (26) and the fixed seat (21) which face each other are both arc faces, and the two ends of the unlocking block (22) are movably clamped between the arc faces of the movable head (26) and the fixed seat (21).

9. A central air-conditioning fan coil tuyere filtering device according to claim 1, characterized in that said filter (5) is an activated carbon air filter (5).

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