CN212928291U - Fan air volume adjusting device - Google Patents

Abstract

The application relates to the technical field of air volume adjusting devices, and aims at the problem that an air pipe of a traditional air fan air volume adjusting device is easily corroded by rainwater, and provides the air fan air volume adjusting device which comprises an air pipe fixed on an air pipe provided with a fan, wherein one end of the air pipe, far away from the air pipe, is rotatably connected with a plurality of blades, when the plurality of blades are rotated to be perpendicular to the side wall of the air pipe, the plurality of blades are mutually abutted and form a vertical plane to cover an opening of the air pipe, the air pipe is also provided with a linkage piece for linking the plurality of blades to rotate simultaneously, the air pipe is also provided with a first driving piece for driving the linkage piece to link the plurality of blades to rotate simultaneously, one end, far away from the air pipe, of the bottom wall of the air pipe penetrates through a first through hole, one side, close to the ground, the first through hole is opposite to the second through hole. This application has the effect that makes the tuber pipe be difficult to by rainwater corruption.

Description

Fan air volume adjusting device

Technical Field

The application relates to the technical field of air volume adjusting devices, in particular to a fan air volume adjusting device.

Background

The fan is used for conveying gas media, widely used for ventilation, dust exhaust and cooling of factories, mines and buildings, and the air-conditioning fan is also widely used in various ventilation places and becomes a matched product of air-conditioning and purifying equipment. Traditional air conditioning fan generally installs in comparatively spacious places such as roof in order to make things convenient for gaseous transport.

Traditional fan generally installs on air pipe, during the use, make gaseous can be through air pipe transport to the destination through the rotation of fan flabellum, because the required gaseous demand of equipment is different, the traditional air volume size that often installs fan air volume adjusting device on the fan and adjust the fan, traditional air volume adjusting device includes the tuber pipe with the air pipe intercommunication that is equipped with the fan, rotate and connect a plurality of blades of keeping away from air pipe one end at the tuber pipe, a plurality of blades of linkage pivoted simultaneously and drive linkage a plurality of blades of linkage pivoted driving piece simultaneously of linkage, when the intake of fan is adjusted to needs, through driving piece drive linkage, make linkage drive blade rotate simultaneously, the size of intake is controlled through the turned angle who adjusts the blade.

To foretell correlation technique, because traditional fan air regulation system generally installs on the balcony and the orientation direction of tuber pipe is generally on a parallel with ground, when meetting extreme weather such as stormy rain, can make a plurality of blades form vertical face through rotating a plurality of blades and cover the air intake usually, reduce the rainwater and get into the tuber pipe, nevertheless because there is the clearance between blade and the tuber pipe, the rainwater gets into the tuber pipe through the clearance easily, long-term rainwater accumulates can harm the corruption tuber pipe on the tuber pipe, influence fan air regulation system's use, the inventor thinks that traditional fan air regulation system has the defect that can't in time get rid of the rainwater that gets into the tuber pipe.

SUMMERY OF THE UTILITY MODEL

In order to make the rainwater that gets into the tuber pipe can in time be discharged, this application provides a fan air regulation device.

The application provides a fan air volume adjusting device adopts following technical scheme:

the utility model provides a fan air volume adjusting device, is including being fixed in the tuber pipe on the air pipe of installing the fan, air pipe is kept away from to the tuber pipe one end rotation and is connected with a plurality of blades, and is a plurality of when the blade rotates to perpendicular with the tuber pipe lateral wall, it is a plurality of the mutual butt of blade just forms vertical plane and covers the tuber pipe opening, still be provided with a plurality of blades of linkage pivoted linkage simultaneously on the tuber pipe, still be provided with the first driving piece of a plurality of blades of drive linkage pivoted simultaneously on the tuber pipe, air pipe's one end is kept away from to the diapire of tuber pipe runs through there is first through-hole, one side that the tuber pipe is close to ground still sliding connection has the connecting plate, it has the second through-hole to run through on the connecting plate, works as when the connecting plate.

Through adopting above-mentioned technical scheme, when fan air volume adjusting device functions, through removing the connecting plate, make second through-hole stagger with first through-hole, thereby make first through-hole on the air pipe not communicate with the external world, make the wind that gets into the tuber pipe be difficult to the external world of outflow, when the intraductal rainwater of needs exhaust, position through removing the connecting plate, make second through-hole on the connecting plate just right with the first through-hole on the tuber pipe, make the rainwater that gets into the tuber pipe just outside the passageway discharge tuber pipe of formation through first through-hole and second through-hole, be favorable to reducing the rainwater that gets into in the tuber pipe and gather in the tuber pipe, be favorable to reducing the condition of rainwater corruption tuber pipe of gathering in the tuber pipe, be favorable to prolonging the life of fan air volume adjusting device, thereby be favorable to prolonging the life.

Preferably, a baffle is further arranged at one end of the bottom wall of the air pipe, which is close to the ventilation pipeline.

Through adopting above-mentioned technical scheme, when the rainwater that gets into in the tuber pipe is more and first through-hole can't in time discharge, through the setting of baffle, make the rainwater that gets into the tuber pipe can be blocked by the baffle, make first through-hole can't in time discharge rainwater be difficult to stretch to other places of tuber pipe, make the tuber pipe be difficult to ponding, be favorable to reducing the condition that the tuber pipe was corroded by the rainwater.

Preferably, the baffle is arranged from one end close to the bottom wall of the air pipe to one end far away from the bottom wall of the air pipe in an inclined and upward manner.

By adopting the technical scheme, when the air pipe supplies air, the air can better enter the ventilation pipeline through the inclined surface of the baffle plate, so that the air supply of the ventilation pipeline is more difficult to be influenced by the baffle plate; meanwhile, when the rainwater which cannot be timely discharged from the first through hole flows to the inclined surface of the baffle plate, the rainwater can flow to the first through hole through gravity, so that the rainwater is not easy to accumulate in the air pipe, the air pipe is not easy to corrode by the rainwater, and the service life of the air pipe is prolonged.

Preferably, one side of the air pipe close to the ground is provided with a base, the base is provided with a first groove, the connecting plate is connected to the first groove in a sliding mode, the air pipe is further provided with a second driving piece for driving the connecting plate to slide, and when the second driving piece moves to a limit state, the first through hole is right opposite to the second through hole.

Through adopting above-mentioned technical scheme, through the setting of connecting plate sliding connection in first recess, be favorable to more steadily adjusting the position of connecting plate, when the intraductal rainwater of air outlet needs to be arranged, through making the second driving piece move to the extreme state, make second through-hole on the connecting plate just right with first through-hole, be favorable to reducing the condition that leads to the intraductal rainwater of tuber pipe to be unable in time to discharge because first through-hole and second through-hole are unable just right when adjusting the position of connecting plate, make the regulation of connecting plate position more convenient, be favorable to making first through-hole and second through-hole just right more fast, be favorable to the intraductal rainwater of tuber pipe to in time discharge, be favorable to reducing the rainwater and gather the condition of corroding the tuber pipe in the.

Preferably, a plurality of third through holes penetrate through the base, and the third through holes are communicated with the first groove.

Through adopting above-mentioned technical scheme, when the rainwater flows from the passageway that first through-hole and second through-hole formed, part rainwater flows in first recess and gathers in first recess through the connecting plate easily, through the setting of third through-hole, make the rainwater of gathering in first recess discharge through the third through-hole, be favorable to reducing the condition of gathering the rainwater corruption base in first recess, be favorable to prolonging the life of base, thereby be favorable to prolonging fan air volume adjusting device's life.

Preferably, the air pipe is also detachably connected with a water absorbing piece, and when the water absorbing piece is fixed in the air pipe, the water absorbing piece is abutted against the bottom wall of the air pipe.

Through adopting above-mentioned technical scheme, through the setting of the piece that absorbs water, can absorb the rainwater through the piece that absorbs water for keep dry more easily in the tuber pipe, make the rainwater be difficult to gather in the tuber pipe, be favorable to reducing the condition of rainwater corruption tuber pipe, be favorable to prolonging the life of tuber pipe.

Preferably, one side of the air pipe far away from the ground is provided with a first opening, the air pipe is connected with a supporting frame in a sliding mode, one side of the supporting frame, which is close to the ground, is fixedly connected with a water absorbing piece, and when the water absorbing piece is abutted to the bottom wall of the air pipe, one side of the supporting frame, which is far away from the ground, covers the first opening.

Through adopting above-mentioned technical scheme, when the diapire butt of piece and tuber pipe absorbs water, the one side that ground was kept away from to the carriage covers first open-ended setting for the tuber pipe is when the ventilation, and wind is difficult to flow outside through first opening, is favorable to increasing the gas tightness of tuber pipe. When the water absorbing part is damaged or is full of water, the supporting frame is moved out of the air pipe and replaced by a new supporting frame, so that rainwater can be absorbed by the water absorbing part on the supporting frame in time, the water absorbing part can be replaced more conveniently, and the condition that rainwater is accumulated in the air pipe to corrode the air pipe due to the fact that the water absorbing part cannot absorb the rainwater in time is reduced.

Preferably, the edge of the air pipe close to the first opening is provided with a sealing ring, and when the opening is closed by the supporting frame, the side wall of the supporting frame is abutted to the sealing ring.

Through adopting above-mentioned technical scheme, when the carriage seals first opening for the wind that gets into the tuber pipe is more difficult to discharge the external world through the clearance of tuber pipe and carriage, makes fan air regulation device can supply air better.

Preferably, one side of one end of the air pipe, which is far away from the ventilation pipeline, which is far away from the ground is provided with a rain baffle.

Through adopting above-mentioned technical scheme, through the setting of weather shield for in the rainwater is difficult to get into the tuber pipe, be favorable to reducing the condition that the rainwater gathers in the tuber pipe, be favorable to reducing the condition that the rainwater corrodes the tuber pipe, be favorable to prolonging the life of tuber pipe.

Preferably, the first through hole and the second through hole are provided with a plurality of holes.

By adopting the technical scheme, rainwater entering the air pipe can be discharged through the plurality of first through holes and the plurality of second through holes respectively and just opposite to the formed channel in time, so that the rainwater entering the air pipe is not easy to accumulate in the air pipe, and the service life of the air pipe is prolonged.

In summary, the present application includes at least one of the following beneficial technical effects:

1. through the arrangement of the first through hole, the connecting plate and the second through hole, when the rainwater needs to be discharged, the first through hole is opposite to the second through hole through the movable connecting plate, so that the rainwater can be discharged through a channel formed by the first through hole and the second through hole, the rainwater is not easy to accumulate in the air pipe, and the rainwater corrosion to the air pipe is reduced;

2. due to the arrangement of the baffle, rainwater which cannot be timely discharged can be blocked by the baffle, so that the rainwater is not easy to spread to other places of the air pipe, the service life of the air pipe is prolonged, and the service life of the fan air quantity adjusting device is prolonged;

3. one end of the baffle close to the bottom wall of the air pipe is arranged to incline upwards towards the end far away from the bottom wall of the air pipe, so that air can better flow into the ventilation pipeline through the inclined surface of the baffle when the air pipe supplies air; when simultaneously making rainwater flow to the inclined plane of baffle, can discharge from first through-hole department through gravity flow direction first through-hole to the rainwater that makes to get into the tuber pipe can in time be discharged, is favorable to reducing the condition that the rainwater gathers in the tuber pipe.

Drawings

Fig. 1 is a schematic overall structure diagram of a fan air volume adjusting device according to an embodiment of the present application;

FIG. 2 is a schematic diagram of an internal structure of a blower air volume adjusting device according to an embodiment of the present application;

FIG. 3 is an enlarged schematic view of section A of FIG. 2;

FIG. 4 is an enlarged schematic view of section B of FIG. 2;

FIG. 5 is an enlarged schematic view of section C of FIG. 2;

fig. 6 is an overall structural schematic diagram of the blower air volume adjusting device according to the embodiment of the present application, in a state where the first through hole and the second through hole are facing each other.

Description of reference numerals: 1. a wall body; 11. a ventilation duct; 12. a fan; 2. an air duct; 21. a first driving member; 22. a blade; 221. a first rotating shaft; 23. a linkage member; 231. a fixed seat; 232. a second rotating shaft; 233. a linkage rod; 24. a first through hole; 25. a rain shield; 26. a first opening; 3. a support frame; 30. a fixing member; 301. a second groove; 302. an elastic member; 303. a propping block; 304. a second opening; 305. a connecting rod; 31. a first beam rail; 32. a vertical rod; 33. a second beam rod; 34. a water absorbing member; 35. a handle; 4. a connecting plate; 41. a second through hole; 42. a base; 421. a first groove; 4211. a third through hole; 5. a baffle plate; 6. a second driving member; 7. and (5) sealing rings.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The embodiment of the application discloses fan amount of wind adjusting device. Referring to fig. 1 and 2, the air duct 2 includes an air duct 2 fixedly connected to one end of a ventilation duct 11 penetrating through a wall 1 and having an inner wall provided with a fan 12, one end of the air duct 2 far away from the ventilation duct 11 is rotatably connected with a plurality of blades 22, and the air duct 2 is provided with a linkage member 23 for linking the plurality of blades 22 and rotating simultaneously and a first driving member 21 for driving the linkage member 23 to link the plurality of blades 22 and rotating simultaneously. Referring to fig. 2 and 4, a plurality of first through holes 24 penetrate through the air duct 2, a connecting plate 4 is slidably connected to one side of the air duct 2 close to the ground, and a plurality of second through holes 41 penetrate through the connecting plate 4.

Referring to fig. 2 and 3, in the present embodiment, the number of the blades 22 is seven, the blades 22 are in a rectangular plate shape, two ends of each blade 22 along the length direction are fixedly connected with a first rotating shaft 221, and a fifth through hole (not shown) penetrates through each of the top wall and the bottom wall of the air duct 2, in the present embodiment, 14 fifth through holes are formed corresponding to the first rotating shafts 221, when the blades 22 are installed on the air duct 2, the first rotating shafts 221 and the fifth through holes are rotatably connected, when the seven blades 22 are rotated to be perpendicular to the side wall of the air duct 2, the seven blades 22 abut against each other and form a vertical plane to cover the opening of the air duct 2, the linkage member 23 includes a fixing seat 231 fixedly connected with each of the seven blades 22, a fourth through hole (not shown) penetrates through the fixing seat 231, a second rotating shaft 232 is fixedly connected in the fourth through hole, and a linkage rod 233 is rotatably connected to the, in this embodiment, the second rotating shafts 232 of the seven blades 22 are all rotatably connected to the linkage rods 233, in this embodiment, the first driving member 21 is a speed reducing motor, and an output shaft of the speed reducing motor is fixedly connected to the first rotating shaft 221 located at the middle position of the air duct 2.

Referring to fig. 2 and 4, in this embodiment, the air duct 2 is a rectangular tube, the first through holes 24 are arranged to be twenty, twenty first through holes 24 are uniformly distributed on the bottom wall of the air duct 2, one side of the air duct 2 close to the ground is provided with bases 42 along both sides of the width direction, the bases 42 are in a rectangular plate shape, the two bases 42 are opposite to each other, one sides of the two bases 42 opposite to each other are recessed with first grooves 421, the connecting plate 4 is in a rectangular plate shape, the connecting plate 4 is respectively connected with the two first grooves 421 in a sliding manner along both sides of the width direction, third through holes 4211 are further penetrated through one side of the two bases 42 close to the ground, in this embodiment, the third through holes 4211 on the two bases 42 are respectively provided with four, the four third through holes 4211 are uniformly distributed along the length direction of the bases 42, and the third through holes 4211 are communicated with the first.

Referring to fig. 2 and 6, in this embodiment, the second through holes 41 on the connecting plate 4 are twenty, twenty second through holes 41 are uniformly distributed on the connecting plate 4, the outer side wall of the side of the air duct 2 close to the ground is further fixedly connected with a second driving member 6 for driving the connecting plate 4 to slide, in this embodiment, the second driving member 6 is a cylinder, the cylinder is communicated with an air source (not shown in the figure), one end of a piston rod of the cylinder, which is far away from the cylinder, is fixedly connected with the side of the connecting plate 4 close to the ground, and when the piston rod is completely extended, the twenty second through holes 41 are respectively aligned to the twenty first through holes 24 on the bottom wall of the air duct.

Referring to fig. 2 and 4, a baffle 5 is further fixedly connected to the bottom wall of the air duct 2, in this embodiment, the baffle 5 is in a rectangular plate shape, two ends of the baffle 5 along the length direction are respectively fixedly connected to two side walls of the air duct 2 along the width direction, and one side of the baffle 5 close to the bottom wall of the air duct 2 is inclined and upwardly disposed towards one side far away from the bottom wall of the air duct 2.

Referring to fig. 2 and 4, a first opening 26 is formed on one side of the air duct 2 away from the ground, a support frame 3 is further slidably connected in the air duct 2, the support frame 3 includes a first cross beam rod 31 and vertical rods 32 fixedly connected to two ends of the first cross beam rod 31 in the length direction, one end of the vertical rod 32 away from the first cross beam rod 31 is further fixedly connected with a second cross beam rod 33, two ends of the second cross beam rod 33 in the length direction are respectively fixedly connected with one end of the vertical rod 32 away from the first cross beam rod 31, in this embodiment, the first cross beam rod 31, the second cross beam rod 33 and the vertical rod 32 are all rectangular rod-shaped, a water absorbing member 34 is fixedly connected to one side of the second cross beam rod 33 close to the ground, in this embodiment, the water absorbing member 34 is a sponge, in this embodiment, the water absorbing member 34 is rectangular plate-shaped, two ends of the water absorbing member 34 in the length direction are respectively abutted against two side walls of the air duct 2 in the width direction, when the side of the water absorbing member 34 close to the ground abuts against the bottom wall of the air duct 2, the first beam member 31 closes the first opening 26. The edge of the air duct 2 close to the first opening 26 is fixedly connected with a sealing ring 7, and when the water absorbing member 34 abuts against the bottom wall of the air duct 2, the side wall of the first beam rod 31 abuts against the sealing ring 7.

Referring to fig. 2 and 5, a handle 35 is further fixedly connected to an intermediate position of one side of the first cross beam rod 31, which is far away from the ground, the first cross beam rod 31 is further provided with a fixing member 30 for fixing the position of the support frame 3, the fixing member 30 includes two second grooves 301 recessed in one end of the first cross beam rod 31 in the length direction, and fixing holes (not shown in the drawings) recessed in both sides of the air duct 2 in the width direction, in this embodiment, the two second grooves 301 are provided as two, the two second grooves 301 are respectively located at both ends of the first cross beam rod 31 in the length direction, the two second grooves 301 are both movably connected with abutting blocks 303, an elastic member 302 is further fixedly connected to a bottom wall of the second groove 301, the elastic member 302 drives the abutting blocks 303 to extend out of the second grooves 301, in this embodiment, the elastic member 302 is a spring, and one end of the elastic member 302, which is far away from the bottom wall of the second groove 301. First crossbeam pole 31 keeps away from one side on ground and has all opened second opening 304 along length direction's both ends, two second openings 304 respectively with two second recess 301 intercommunications, two last equal fixedly connected with connecting rod 305 of piece 303 that support, and connecting rod 305 stretches out outside second opening 304. When the first beam member 31 closes the first opening 26, the two abutment blocks 303 are inserted into and abut against the fixing holes.

Referring to fig. 2 and 4, a rain shield 25 is further fixedly connected to a side of the end of the air duct 2 away from the ventilation duct 11 away from the ground.

The implementation principle of the fan air volume adjusting device in the embodiment of the application is as follows: when meeting with the stormy weather, start second driving piece 6, thereby it slides to drive connecting plate 4, when second driving piece 6 moves to the limit state, second through-hole 41 on connecting plate 4 is just right with first through-hole 24 on tuber pipe 2 respectively, make the rainwater that gets into in the tuber pipe 2 can flow out through first through-hole 24 and second through-hole 41, make the rainwater in the tuber pipe 2 be difficult to gather in tuber pipe 2, be favorable to reducing the condition that the rainwater that gathers in tuber pipe 2 corrodes tuber pipe 2, be favorable to prolonging the life of tuber pipe 2, thereby be favorable to prolonging fan amount of wind adjusting device's life.

Through the setting of baffle 5 for the rainwater that can not come too late to discharge through first through-hole 24 in getting into tuber pipe 2 can be blocked by baffle 5, is favorable to reducing the rainwater and stretches to other places of tuber pipe 2, makes tuber pipe 2 be difficult to by the rainwater corruption, is favorable to prolonging tuber pipe 2's life.

The baffle 5 is obliquely and upwards arranged from one side close to the bottom wall of the air pipe 2 to one side far away from the bottom wall of the air pipe 2, so that when the air pipe 2 supplies air, the air can better enter the ventilation pipeline 11 through the inclined surface of the baffle 5; simultaneously, make the rainwater utilize gravity flow direction first through-hole 24 through the inclined plane of baffle 5 for the rainwater that flows into in tuber pipe 2 is difficult to gather in tuber pipe 2, is favorable to reducing the condition that the rainwater corrodes tuber pipe 2, is favorable to prolonging the life of tuber pipe 2.

Through the setting of sealing washer 7 for after carriage 3 installed in tuber pipe 2, the wind is difficult to run out from the clearance between carriage 3 and the tuber pipe 2 when tuber pipe 2 ventilates, makes fan air regulation device be difficult for leaking out when ventilating, makes fan air regulation device's air output be difficult to receive the influence.

Through the setting of piece 34 that absorbs water for the piece that absorbs water can absorb the rainwater in the tuber pipe 2, is favorable to keeping dry in the tuber pipe 2 better, makes to be difficult to in the tuber pipe 2 and gathers the rainwater, is favorable to reducing the condition that the rainwater corrodes tuber pipe 2, is favorable to prolonging the life of tuber pipe 2.

Through the setting of mounting 30 for carriage 3 can be installed in tuber pipe 2 more firmly, thereby makes the piece 34 that absorbs water can more firmly with 2 diapire butts of tuber pipe, makes the piece 34 that absorbs water can in time absorb the rainwater in the tuber pipe 2, makes the rainwater be difficult to gather in tuber pipe 2, is favorable to reducing the condition that rainwater corrodes tuber pipe 2.

Through the setting of handle 35 for need change the piece 34 that absorbs water, can pull out carriage 3 through handle 35, make the change and the dismantlement of the piece 34 that absorbs water more convenient.

Through the setting of weather shield 25, be favorable to reducing the rainwater and get into tuber pipe 2 to be favorable to reducing the condition that the rainwater is gathered in tuber pipe 2, be favorable to reducing the condition that the rainwater corrodes tuber pipe 2, be favorable to prolonging the life of tuber pipe 2.

Through the setting of third through-hole 4211 for the rainwater of gathering in first recess 421 can be discharged through third through-hole 4211, makes the rainwater be difficult to gather in first recess 421, makes the rainwater be difficult to corrode base 42, is favorable to prolonging base 42's life, is favorable to prolonging fan air regulation unit's life.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (10)

1. The utility model provides a fan air volume adjusting device, is including being fixed in tuber pipe (2) on air pipe (11) of installing fan (12), the one end that air pipe (2) kept away from air pipe (11) is rotated and is connected with a plurality of blades (22), and is a plurality of when blade (22) rotate to perpendicular with tuber pipe (2) lateral wall blade (22) butt each other and form vertical plane cover tuber pipe (2) opening, still be provided with linkage a plurality of blades (22) pivoted linkage piece (23) simultaneously on tuber pipe (2), still be provided with drive linkage piece (23) on tuber pipe (2) and link a plurality of blades (22) pivoted first driving piece (21) simultaneously, its characterized in that: air pipe (11) is kept away from to the diapire of tuber pipe (2) one end runs through and has first through-hole (24), there is connecting plate (4) one side that tuber pipe (2) are close to ground still sliding connection, it has second through-hole (41) to run through on connecting plate (4), works as connecting plate (4) slide to first through-hole (24) under during, first through-hole (24) are just right with second through-hole (41).

2. The fan air volume adjusting device according to claim 1, characterized in that: and a baffle (5) is also arranged at one end of the bottom wall of the air pipe (2) close to the ventilation pipeline (11).

3. The fan air volume adjusting device according to claim 2, characterized in that: baffle (5) are upwards set up by the one end slope of keeping away from tuber pipe (2) diapire towards the one end of keeping away from tuber pipe (2) diapire by the one end that is close to tuber pipe (2).

4. A fan air volume adjusting device according to claim 3, characterized in that: one side that tuber pipe (2) is close to ground is provided with base (42), be provided with first recess (421) on base (42), connecting plate (4) sliding connection is in first recess (421), still be provided with gliding second driving piece (6) of drive connecting plate (4) on tuber pipe (2), work as when second driving piece (6) move to the extreme state, first through-hole (24) are just right with second through-hole (41).

5. The blower air volume adjusting device according to claim 4, characterized in that: a plurality of third through holes (4211) penetrate through the base (42), and the third through holes (4211) are communicated with the first groove (421).

6. The fan air volume adjusting device according to claim 2, characterized in that: the air pipe (2) is also detachably connected with a water absorbing piece (34), and when the water absorbing piece (34) is fixed in the air pipe (2), the water absorbing piece (34) is abutted against the bottom wall of the air pipe (2).

7. The blower air volume adjusting device of claim 6, characterized in that: one side that ground was kept away from in tuber pipe (2) is opened there is first opening (26), sliding connection has carriage (3) in tuber pipe (2), carriage (3) are close to one side fixedly connected with water absorption piece (34) on ground, work as when water absorption piece (34) and the diapire butt of tuber pipe (2), one side that ground was kept away from in carriage (3) covers first opening (26).

8. The blower air volume adjusting device of claim 7, characterized in that: the edge that tuber pipe (2) are close to first opening (26) is provided with sealing washer (7), works as when first opening (26) are sealed in carriage (3), the lateral wall and the sealing washer (7) butt of carriage (3).

9. The fan air volume adjusting device according to claim 1, characterized in that: and a rain baffle (25) is arranged on one side, away from the ground, of one end, away from the ventilation pipeline (11), of the air pipe (2).

10. The fan air volume adjusting device according to claim 1, characterized in that: the first through hole (24) and the second through hole (41) are provided with a plurality of holes.

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