CN213901359U

CN213901359U - Energy-saving building ventilation equipment

Info

Publication number: CN213901359U
Application number: CN202023122026.3U
Authority: CN
Inventors: 詹剑波; 陈功宝; 赵志浩
Original assignee: Guangdong Fifths Constructional Engineering Co ltd
Current assignee: Guangdong Fifths Constructional Engineering Co ltd
Priority date: 2020-12-22
Filing date: 2020-12-22
Publication date: 2021-08-06
Anticipated expiration: 2030-12-22

Abstract

The application relates to an energy-conserving building ventilation equipment, it includes: air pipe, flabellum and air filter, air pipe's air-out end is provided with air guide box, one side that air guide box kept away from air pipe sets up the level and is provided with the first tuber pipe that length direction and air pipe length direction are unanimous, air guide box bottom is provided with length direction and air pipe length direction looks vertically second tuber pipe, first tuber pipe and air guide box junction and second tuber pipe all are provided with the subassembly of opening and close that is used for opening and close first tuber pipe and second tuber pipe and air guide box junction, first tuber pipe is provided with the first adjusting part who is used for adjusting first tuber pipe air output, be provided with the second adjusting part who is used for adjusting second tuber pipe air-out height on the second tuber pipe. This application has the effect that can adjust air pipe's air-out direction and air output.

Description

Energy-saving building ventilation equipment

Technical Field

The application relates to the technical field of building ventilation, in particular to energy-saving building ventilation equipment.

Background

The lighting and ventilation area of many small and medium-sized residences is relatively small, the natural ventilation capability is relatively poor, especially some independent rooms without windows cannot realize natural ventilation, and people work and live in a closed space for a long time and are easy to cause respiratory system diseases, so that ventilation equipment is generally needed to conveniently supply air and exhaust air indoors.

At present, a wall is generally provided with a vent hole in a penetrating mode, a vent pipe is installed in the vent hole, and in order to increase the ventilation speed, the air outlet of fan blades is generally towards indoor fan blades. When natural wind passes through the ventilation opening, the wind enters the ventilation pipe to drive the fan blades to rotate, so that outdoor natural air can be conveyed to the interior of the building, the flowing speed of indoor air is increased, and the freshness of the air is kept.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: the air in the ventilation pipeline is directly led to the indoor, the fresh air is diffused towards all directions, the air cannot be supplied to the position where the specific air supply is needed, in addition, the air inlet volume cannot be adjusted according to the needs, the ventilation effect is not ideal, and the air is further improved.

SUMMERY OF THE UTILITY MODEL

In order to adjust air pipe's air-out direction and air output to satisfy different ventilation needs, this application provides an energy-conserving building ventilation equipment.

The application provides an energy-conserving building ventilation equipment adopts following technical scheme:

an energy efficient building ventilation device comprising: the ventilating duct is horizontally arranged on the wall; the fan blades are arranged in the ventilating duct; and an air filter element arranged in the air duct, which is characterized in that an air guide box is arranged at the air outlet end of the air duct, one side of the air guide box far away from the air duct is horizontally provided with a first air pipe with the length direction consistent with the length direction of the air duct, the bottom of the air guide box is provided with a second air pipe with the length direction vertical to the length direction of the air duct, the joint of the first air pipe and the air guide box and the joint of the second air pipe and the air guide box are both provided with an opening and closing component for opening and closing the first air pipe and the second air pipe, the first air pipe is provided with a first adjusting component for adjusting the air outlet quantity of the first air pipe, the second air pipe is provided with a second adjusting component for adjusting the air outlet height of the second air pipe, wherein the side wall of the first air pipe is provided with a plurality of first air outlet holes in a penetrating way, and a plurality of second air outlet holes are formed in the side wall of the second air pipe in a penetrating manner.

Adopt above-mentioned technical scheme, through setting up air guide box, first tuber pipe and second tuber pipe, can lead to level and two vertical directions with the indoor wind that gets into, the direction that the limited air flows, open and close the subassembly through the setting, can ventilate the needs as required, the convenient first tuber pipe or the second tuber pipe of opening and close, through first adjusting part, the air output and the air-out angle that can adjust first tuber pipe as required, in addition, through setting up the second adjusting part, can be according to the ventilation demand, pointed regulation air-out height. Through this scheme, can conveniently adjust air pipe's air-out direction, air output, air-out height and air-out angle, can satisfy different ventilation demands.

Preferably, the opening and closing assembly includes: the sliding opening penetrates through the top wall of the air guide box and is arranged at one side close to the first air pipe; the sliding plate is connected in the sliding opening in a sliding manner and is matched with the sliding opening; and the limiting part is arranged on the top wall of the air guide box and used for limiting the displacement of the sliding plate.

By adopting the technical scheme, through setting the sliding opening and the sliding plate, the air inlet of the first air pipe can be conveniently opened or closed, so that natural air can enter the first air pipe, or enter the second air pipe or simultaneously enter the first air pipe and the second air pipe, the ventilation requirement is ensured, and after the position of the sliding plate is determined, the limiting part can lock the sliding plate on the air guide box, so that the stability of the sliding plate is ensured.

Preferably, the stopper includes: the limiting holes are formed in the side wall of the sliding plate; the limiting groove is formed in the top of the air guide box, and the length direction of the limiting groove is perpendicular to the sliding direction of the sliding plate; the limiting block is connected in the limiting groove in a sliding manner; and the limiting rod is arranged at the top of the limiting block and has a size matched with that of the limiting hole.

Adopt above-mentioned technical scheme, through setting up spacing hole, spacing groove, stopper and gag lever post, after the position determination of slide plate, promote the gag lever post and remove to the slide plate direction, make the gag lever post tip get into the spacing downthehole of slide plate lateral wall, under the mutually supporting of stopper and stopper, the gag lever post can not separate with the wind-guiding case, reduces the gag lever post and drops or the possibility of losing to guarantee the limiting displacement of locating part to slide plate.

Preferably, the first adjustment assembly comprises: the mounting ring is arranged on the side wall of the wall body and sleeved outside the first air pipe; the adjusting groove penetrates through the side wall of the mounting ring, and the length direction of the adjusting groove is consistent with the extending direction of the side wall of the mounting ring; the adjusting plate is arranged between the mounting ring and the first air pipe in a sliding mode; and a locking member disposed between the adjustment plate and the mounting ring.

Adopt above-mentioned technical scheme, through setting up the collar, the adjustment tank, regulating plate and locking piece, when the air output or the air-out angle of first tuber pipe need be adjusted, through the locking effect of unblock locking piece to the regulating plate, can be convenient rotate the regulating plate between collar and first tuber pipe to change quantity and the position that the regulating plate covers first exhaust vent, thereby can reach the effect of adjusting air output and air-out direction.

Preferably, the locking member includes: the locking rod is arranged on one side, away from the first air pipe, of the adjusting plate and is matched with the adjusting groove in size; and a locking nut disposed at an end of the locking rod.

By adopting the technical scheme, after the position of the adjusting plate is determined, the locking nut is screwed at the end part of the locking rod, so that the position of the locking rod can be fixed, the position of the adjusting plate can be fixed, and the stability of the adjusting plate in the working process can be ensured.

Preferably, the second adjustment assembly comprises: the sliding rails are arranged on two sides of the second air pipe, are perpendicular to two side walls of the wall body and have the length direction consistent with the length direction of the second air pipe; the two wind shields are connected in the sliding rail in a sliding manner and are matched with the second air pipe in size; and limiting pieces arranged on the side walls of the wind deflector and used for limiting the wind deflector to slide.

Adopt above-mentioned technical scheme, through setting up slide rail, deep bead and restriction piece, when the air-out height was adjusted in order to satisfy different ventilation demands to needs, through the restriction effect of unblock restriction piece to the deep bead, the deep bead that can slide on the length direction of slide rail makes the deep bead cover the second exhaust vent that does not need, makes the natural wind of second tuber pipe flow in can following the second exhaust vent of predetermined height.

Preferably, the restricting member includes: the plurality of threaded holes are formed in the bottom of the sliding rail; the mounting blocks are arranged on two sides of the wind shield; and the threaded rod is in threaded connection with the side wall of the mounting block and is matched with the threaded hole.

By adopting the technical scheme, the threaded holes, the mounting blocks and the threaded rods are arranged, the threaded rods are loosened by screwing, so that the threaded rods are separated from the threaded holes in the sliding rail, the sliding wind shield can be convenient, the threaded rods are in threaded connection with the mounting blocks, the sliding of the wind shield is not influenced, and the possibility of losing the threaded rods can be reduced.

Preferably, the first air pipe is far away from one end of the ventilation pipeline is provided with a telescopic air pipe, and the end part of the telescopic air pipe is in threaded connection with a pipe cover.

Adopt above-mentioned technical scheme, through setting up flexible tuber pipe and tube cap, when certain position needs quick ventilation to reach the purpose of drying or removing the flavor, through the flexible tuber pipe of pulling, open the tube cap, can conveniently carry out the quick ventilation and handle.

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

the air guide box, the first air pipe and the second air pipe are arranged, so that air entering a room can be guided to the horizontal direction and the vertical direction, and the air flowing direction is limited; through the arrangement of the sliding opening, the sliding plate and the limiting piece, the first air pipe or the second air pipe can be opened and closed conveniently according to the ventilation requirement;

by arranging the mounting ring, the adjusting groove, the adjusting plate and the locking piece, when the air output or the air output angle of the first air pipe needs to be adjusted, the adjusting plate can be conveniently rotated between the mounting ring and the first air pipe by unlocking the locking piece, so that the number and the position of the first air outlet holes covered by the adjusting plate are changed, and the effect of adjusting the air output and the air output direction can be achieved;

through setting up slide rail, deep bead and restriction piece, when the air-out height is adjusted in order to satisfy different ventilation demands as required, through the restriction effect of unblock restriction piece to the deep bead, can slide the deep bead on the length direction of slide rail, can be according to the ventilation demand, pointed regulation air-out height.

Drawings

FIG. 1 is a schematic overall structure of the present application;

FIG. 2 is a top view of a schematic of the overall structure of the present application;

FIG. 3 is a cross-sectional view taken at A-A in FIG. 2;

FIG. 4 is a front view of a schematic of the overall structure of the present application;

FIG. 5 is a cross-sectional view taken at B-B of FIG. 4;

FIG. 6 is an enlarged view at B in FIG. 5;

fig. 7 is an enlarged view at a in fig. 1.

Description of reference numerals: 1. a ventilation duct; 10. a wall body; 11. a fan blade; 12. an air filter element; 2. a wind guide box; 21. a first air duct; 210. a first air outlet; 22. a telescopic air duct; 221. a tube cover; 23. a second air duct; 230. a second air outlet hole; 241. a slide plate; 25. a guide block; 251. a guide groove; 26. a limiting hole; 261. a limiting groove; 262. a limiting block; 263. a limiting rod; 264. a connecting spring; 3. a mounting ring; 31. an adjustment groove; 32. an adjusting plate; 33. a locking lever; 34. a locking nut; 4. a slide rail; 41. a wind deflector; 42. a threaded hole; 43. mounting blocks; 44. a threaded rod.

Detailed Description

The present application is described in further detail below with reference to figures 1-7.

The embodiment of the application discloses energy-saving building ventilation equipment. Referring to fig. 1 and 2, the energy saving building ventilation apparatus is installed on a wall 10.

Referring to fig. 2 and 3, the energy-saving building ventilation equipment includes a ventilation duct 1, fan blades 11 and an air filter element 12, in this embodiment, a ventilation opening (not shown in the figure) matched with the ventilation duct 1 is horizontally formed in a side wall of a wall 10 in a penetrating manner, the ventilation duct 1 is horizontally installed in the ventilation opening on the wall 10, the fan blades 11 are installed at one end of the ventilation duct 1 close to an air inlet, outdoor natural wind can be rapidly guided into the ventilation duct 1, the air filter element 12 is installed in the ventilation duct 1, air passing through the ventilation duct 1 can be filtered, and indoor air quality is improved.

In this embodiment, look back at fig. 1, air guide box 2 is fixed with at air outlet end of air pipe 1, wherein, air guide box 2 is the rectangle case, one side intercommunication of keeping away from air pipe 1 at air guide box 2 has first tuber pipe 21, wherein, first tuber pipe 21 is the circular pipe and fixed with air guide box 2 threaded connection, make things convenient for the dismouting, and the length direction of first tuber pipe 21 is unanimous with air pipe 1's length direction, can carry out the horizontal direction with air pipe 1 exhaust new trend, run through at first tuber pipe 21 lateral wall and seted up a plurality of first exhaust vents 210, a plurality of first exhaust vents 210 become the array at first tuber pipe 21 lateral wall and arrange, guarantee that first tuber pipe 21 can even air-out.

The end of the first air duct 21 far away from the ventilation duct 1 is communicated with a telescopic air duct 22, and the end of the telescopic air duct 22 far away from the first air duct 21 is in threaded connection with a duct cover 221 matched with the telescopic air duct 22. When a certain indoor point is wet and needs quick ventilation and drying, the telescopic air pipe 22 is pulled to the target point, the pipe cover 221 is opened, the certain point can be conveniently and quickly ventilated, mechanical air supply is not needed, and the device is safe, convenient and environment-friendly.

There is second tuber pipe 23 in 2 diapire intercommunications of wind-guiding case, wherein, second tuber pipe 23 is the rectangular pipe and with wind-guiding case 2 welded fastening, the length direction of second tuber pipe 23 is mutually perpendicular with air pipe 1's length direction, can carry out the direction of vertical direction with air pipe 1 exhaust new trend, in addition, second tuber pipe 23 is close to air pipe 1's outer wall and is laminated mutually with wall body 10, all the other sides of second tuber pipe 23 are all run through and have been seted up a plurality of second exhaust vents 230, a plurality of second exhaust vents 230 are arranged at second tuber pipe 23 lateral wall one-tenth array, it is even to make the air-out of second tuber pipe 23.

The opening and closing assembly is arranged at the joint of the first air pipe 21 and the air guide box 2, the first air pipe 21 can be conveniently opened or closed by opening the opening and closing assembly so as to control the air quantity of the air guide box 2 entering the first air pipe 21, in addition, the opening and closing assembly is also arranged at the joint of the second air pipe 23 and the air guide box 2, the second air pipe 23 can be opened and closed, and the air inlet quantity of the second air pipe 23 is controlled. The two sets of opening and closing components have the same structure and principle, and are only installed at different positions on the air guide box 2, and in this embodiment, only the opening and closing component between the first air duct 21 and the air guide box 2 is taken as an example for description.

Referring to fig. 4 and 5, the opening and closing assembly in the present embodiment includes: the opening that slides (not shown in the figure), shifting board 241 and locating part, wherein, the opening that slides runs through and sets up in the one side that the top wall of air guide box 2 is close to first tuber pipe 21, shifting board 241 slides in the opening that slides of air guide box 2, the size of the opening that slides and the size looks adaptation of shifting board 241, and shifting board 241's size is greater than the orificial size of first tuber pipe 21, shifting board 241 can be at the intraoral vertical slip that slides, thereby can adjust the amount of wind that air guide box 2 got into in first tuber pipe 21, can open or close first tuber pipe 21.

In addition, referring to fig. 5 and 6, the guide blocks 25 are fixed at the bottoms of both sides of the sliding plate 241, the inner wall of the air guide box 2 is provided with the guide groove 251, the size of the guide groove 251 is matched with the size of the guide block 25, the length direction of the guide groove 251 is consistent with the displacement direction of the sliding plate 241, and the guide block 25 slides in the guide groove 251, so that the stability of the sliding plate 241 in the moving process can be improved.

The stopper is provided on the bottom wall of the air guide box 2, and can restrict the displacement of the slide plate 241. The limiting member in this embodiment includes: a limit hole 26, a limit groove 261, a limit block 262 and a limit rod 263.

The plurality of limiting holes 26 are formed in the side wall of the sliding plate 241, and the plurality of limiting holes 26 are uniformly arranged at intervals along the length direction of the side wall of the sliding plate 241. Spacing groove 261 is seted up at air guide box 2 roof, and the length direction of spacing groove 261 is mutually perpendicular with the displacement direction of board 241 that slides, and the size of stopper 262 and the size looks adaptation of spacing groove 261, stopper 262 slide connect the spacing groove 261 in, stopper 262 can be in spacing groove 261 horizontal slip promptly.

Spacing pole 263 fixes at stopper 262 top, and the length direction of spacing pole 263 is unanimous with the length direction of spacing groove 261, and the size of spacing pole 263 and spacing hole 26's size looks adaptation, and after the position determination of board 241 slides, spacing pole 263 can alternate in the spacing hole 26 of board 241 lateral wall slides to can follow the horizontal direction with the locking of the board 241 that slides that vertically slides, guarantee the stability of first tuber pipe 21 air inlet.

In this embodiment, a connection spring 264 is horizontally disposed between one side of the limiting block 262 far from the sliding plate 241 and the side wall of the limiting groove 261, and under the action of the elastic force, the limiting rod 263 can be tightly abutted to the limiting hole 26 on the sliding plate 241, so that the stability of the sliding plate 241 can be further increased.

Referring to fig. 1 and 7, a first adjusting assembly is disposed on the first air duct 21, and the air output position of the first air duct 21 can be adjusted as required by opening the first adjusting assembly. The first adjustment assembly in this embodiment includes: the mounting ring 3 is sleeved outside the first air pipe 21, and the mounting ring 3 is fixed on the side wall of the wall body 10, so that the stability of the first air pipe 21 on the wall body 10 can be ensured; the adjusting groove 31 penetrates through the side wall of the mounting ring 3, wherein the length direction of the adjusting groove 31 is consistent with the extending direction of the side wall of the mounting ring 3. The adjusting plate 32 in this embodiment is an arc-shaped plate, the adjusting plate 32 slides between the mounting ring 3 and the first air duct 21, one side of the adjusting plate 32 close to the first air duct 21 is attached to the outer wall of the first air duct 21, and the size of the adjusting plate 32 is enough to cover the first air outlet 210.

By rotating the adjusting plate 32, the number of the first air outlets 210 and the position of the first air outlets can be adjusted, so that the air outlet angle and the air outlet angle of the first air pipe 21 can be adjusted.

The locking member is provided between the adjustment plate 32 and the mounting ring 3, and can fix the position of the adjustment plate 32 to the mounting ring 3. The locking piece in this embodiment includes: a locking rod 33 and a locking nut 34, wherein the locking rod 33 is fixed on one side of the adjusting plate 32 far away from the first air duct 21, the length direction of the locking rod 33 is consistent with the length direction of the adjusting plate 32, the size of the locking rod 33 is matched with the size of the adjusting groove 31, and the locking rod 33 penetrates through the mounting ring 3 by passing through the adjusting groove 31.

When adjusting plate 32 rotated between collar 3 and first tuber pipe 21, can drive locking lever 33 and slide in adjustment tank 31, adjustment tank 31 and locking lever 33 can restrict the scope that adjusting plate 32 removed, improve adjusting plate 32's stability, after adjusting plate 32's position was confirmed, with lock nut 34 threaded connection at locking lever 33 tip, can fix adjusting plate 32 on collar 3, guarantee adjusting plate 32's stability.

In addition, referring to fig. 1 and 5, a second adjusting assembly is disposed on the second air duct 23, and the air output height of the second air duct 23 can be adjusted according to the ventilation requirement by opening the second adjusting assembly. The second adjustment assembly in this embodiment includes: a slide rail 4, two wind deflectors 41 and a limiting piece.

The slide rails 4 are fixed on two side walls of the second air duct 23 perpendicular to the wall 10, and the length direction of the slide rails 4 is consistent with the length direction of the second air duct 23. The size of the baffle is matched with the size of the second air duct 23, the second air outlet holes 230 on three sides of the second air duct 23 can be covered, the cross section of the baffle is n-shaped, the two air baffles 41 are connected to the sliding rail 4 in a sliding manner, when the two air baffles 41 are mutually attached, the second air outlet holes 230 on the second air duct 23 can be completely covered, so that the second air duct 23 is closed, and when the two air baffles 41 are mutually far away to the farthest distance, the second air outlet holes 230 on the second air duct 23 cannot be covered.

The restricting member is provided between the side wall of the wind deflector 41 and the slide rail 4, and restricts the movement of the wind deflector 41. The restriction member in this embodiment includes: the wind deflector comprises a threaded hole 42, a mounting block 43 and a threaded rod 44, wherein the threaded hole 42 is formed in one side of the slide rail 4 far away from the wall 10 and is multiple, the threaded holes 42 are uniformly arranged along the length direction of the slide rail 4 at intervals, the mounting block 43 is fixed on the side wall of the wind deflector 41 perpendicular to the box body, and a through hole (not shown in the figure) is horizontally formed in the side wall of the mounting block 43 in a penetrating manner.

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

1. An energy efficient building ventilation device comprising: a ventilation pipeline (1) horizontally arranged on a wall body (10); fan blades (11) arranged in the ventilation pipeline (1); and set up in air filter (12) in air pipe (1), its characterized in that, the air-out end of air pipe (1) is provided with leads bellows (2), lead bellows (2) to keep away from one side of air pipe (1) sets up the level and is provided with length direction with air pipe (1) length direction unanimous first tuber pipe (21), lead bellows (2) bottom be provided with length direction with air pipe (1) length direction looks vertically second tuber pipe (23), first tuber pipe (21) with lead bellows (2) junction and second tuber pipe (23) with lead bellows (2) junction all is provided with and is used for opening and close first tuber pipe (21) with the subassembly of opening and close of second tuber pipe (23), first tuber pipe (21) are provided with and are used for adjusting the first adjusting part of first tuber pipe (21) air output, the second air pipe (23) is provided with a second adjusting component for adjusting the air outlet height of the second air pipe (23), wherein the side wall of the first air pipe (21) is penetrated and provided with a plurality of first air outlet holes (210), and the side wall of the second air pipe (23) is penetrated and provided with a plurality of second air outlet holes (230).

2. The energy saving building ventilation apparatus of claim 1, wherein the opening and closing assembly comprises: a sliding opening which penetrates through the top wall of the air guide box (2) and is arranged at one side close to the first air pipe (21); the sliding plate (241) is connected in the sliding opening in a sliding manner and is matched with the sliding opening; and the limiting piece is arranged on the top wall of the air guide box (2) and used for limiting the displacement of the sliding plate (241).

3. The energy saving building ventilation apparatus of claim 2, wherein the limiting member comprises: a plurality of limiting holes (26) arranged on the side wall of the sliding plate (241); a limiting groove (261) which is arranged at the top of the air guide box (2) and the length direction of which is vertical to the sliding direction of the sliding plate (241); a limiting block (262) connected in the limiting groove (261) in a sliding manner; and the limiting rod (263) is arranged at the top of the limiting block (262) and has the size matched with that of the limiting hole (26).

4. The energy saving building ventilation apparatus of claim 1, wherein the first adjustment assembly comprises: the mounting ring (3) is arranged on the side wall of the wall body (10) and sleeved outside the first air pipe (21); the adjusting groove (31) penetrates through the side wall of the mounting ring (3) and the length direction of the adjusting groove is consistent with the extending direction of the side wall of the mounting ring (3); an adjusting plate (32) slidably disposed between the mounting ring (3) and the first air duct (21); and a locking member disposed between the adjustment plate (32) and the mounting ring (3).

5. The energy saving building ventilation apparatus of claim 4, wherein the locking member comprises: the locking rod (33) is arranged on one side, away from the first air pipe (21), of the adjusting plate (32) and matched with the adjusting groove (31) in size; and a lock nut (34) provided at an end of the lock lever (33).

6. The energy saving building ventilation apparatus of claim 1, wherein the second adjustment assembly comprises: the sliding rails (4) are arranged on two sides of the second air pipe (23) and are vertical to two side walls of the wall body (10), and the length direction of the sliding rails is consistent with the length direction of the second air pipe (23); two wind shields (41) which are connected in the sliding rail (4) in a sliding manner and are matched with the second air pipe (23) in size; and a limiting piece which is arranged on the side wall of the wind deflector (41) and is used for limiting the sliding of the wind deflector (41).

7. The energy saving building ventilator of claim 6 wherein the restriction member comprises: a plurality of threaded holes (42) arranged at the bottom of the slide rail (4); mounting blocks (43) arranged on two sides of the wind deflector (41); and a threaded rod (44) which is in threaded connection with the side wall of the mounting block (43) and is matched with the threaded hole (42).

8. The energy-saving building ventilation equipment according to claim 1, wherein a telescopic air pipe (22) is arranged at one end of the first air pipe (21) far away from the ventilation pipeline (1), and a pipe cover (221) is connected to the end of the telescopic air pipe (22) in a threaded manner.