CN217503895U

CN217503895U - Ventilation unit is used in building automatic control

Info

Publication number: CN217503895U
Application number: CN202221601411.2U
Authority: CN
Inventors: 王亚哲; 郗锋
Original assignee: Xi'an Yachuan Electric Power Technology Co ltd
Current assignee: Xi'an Yachuan Electric Power Technology Co ltd
Priority date: 2022-06-24
Filing date: 2022-06-24
Publication date: 2022-09-27
Anticipated expiration: 2032-06-24

Abstract

The utility model discloses a ventilation device for building automatic control, which comprises an air duct, an installation structure, an air inlet unit, an air inlet extension unit, an air outlet unit and a sealing plate; communicate the building indoor and external environment through the wind channel, thereby carry out the indoor air outgoing of building, come the wind channel to hang to connect through mounting structure and install on the indoor top of building, carry out the intake of building room air through the air inlet unit, prolong the air inlet unit through air inlet extension unit, can carry out the focus to the indoor air zone of building that corresponds and inhale, carry out the discharge of building room air through the air-out unit, be used for blockking in the foreign matter gets into the wind channel simultaneously, carry out the closure of air-out unit when not discharging building room air through the closing plate, come into the air through the air intake in the wind channel, come the air in the air channel of discharging through the air outlet, make the inside air in wind channel circulate through the fan.

Description

Ventilation unit is used in building automatic control

Technical Field

The utility model relates to a building ventilation technology field specifically is a ventilation unit for building automatic control.

Background

The building ventilation device is installed on the wall of a building or hung at the indoor top of the building, and is used for extracting air in the building and discharging the air to an outdoor space, so that fresh air enters the building, and the indoor air environment meets the sanitary standard.

Through search, the publication number is CN 214791471U, the name is a patent of a building self-control ventilation device, the patent drives the rotation of the screw rod through the matching of the equipment motor, the screw rod, the limit block, the wind shield, the support, the mounting plate and the air inlet, the wind shield can slide on the screw rod through the limit of the limit block, when the wind shield slides to the left air inlet, the left air inlet can not finish air inlet, thereby the ventilation can not be realized, the left space can not be ventilated, the right air inlet can normally ventilate, the left air inlet can normally ventilate, the right ventilation opening can not work when the wind shield slides to the right air inlet, when the spaces on the left side and the right side need to be ventilated simultaneously, the wind shield slides to the middle part of the ventilation box through the screw rod, the air inlets on the left side and the right side can be ventilated, so that the equipment has higher practicability, and the requirement of controlling a single air inlet by people can be met.

For the hanging-mounted building ventilation device, the fan is usually mounted in the air duct, the air duct can be driven to vibrate in the operation process of the fan, and the common fixing device can loosen and fall off after the air duct vibrates for a long time, so that danger is caused. Meanwhile, the air draft device of the existing building ventilation device is fixedly installed, so that the serious indoor air pollution part cannot be seriously drawn, the indoor air circulation efficiency is low, and resources are wasted.

SUMMERY OF THE UTILITY MODEL

In view of the problems in the prior art, the utility model discloses a ventilation device for building automatic control, which adopts the technical proposal that the ventilation device comprises an air duct, an installation structure, an air inlet unit, an air inlet extension unit, an air outlet unit and a sealing plate; the air duct is of a hollow cuboid structure, an air inlet is formed in the lower surface of the rear end of the air duct, an air outlet is formed in the front side surface of the air duct, a fan is arranged in the air duct, and an output port of the fan faces the air outlet; the mounting structure is mounted in the middle of the air duct; the air inlet extension unit is arranged at the air inlet through the air inlet unit; the utility model discloses a building indoor air inlet, including building indoor air inlet, building indoor air outlet, air outlet unit, air inlet unit, air outlet unit, the closing plate passes through the air-out unit and installs in air outlet department, communicate building indoor and external environment through the wind channel, thereby carry out the indoor air escape of building, come the wind channel to hang to connect through mounting structure and install on the indoor top of building, carry out the intake of building indoor air through the air inlet unit, can carry out the focus to the indoor air region of building that corresponds and inhale, come to carry out the discharge of building indoor air through the air outlet unit, be used for blockking in the foreign matter gets into the wind channel simultaneously, carry out the closure of air outlet unit when not discharging building indoor air through the closing plate, come into the air in the wind channel through the air intake, come the inside air in the wind channel to circulate through the fan.

As the preferred technical scheme of the ventilation unit for building automatic control of the utility model, the mounting structure comprises two screw suspension posts, an upper fixed plate, a lower fixed plate, a sleeve, a hexagonal nut and a damping spring, the screw suspension posts are respectively and symmetrically positioned at the left side and the right side of an air duct, the sleeve is movably sleeved at the two ends of the upper fixed plate, the sleeve is movably sleeved at the two ends of the lower fixed plate, the hexagonal nut is fixedly sleeved on the outer end of the sleeve, the thread of the hexagonal nut is screwed on the screw suspension post, the upper fixed plate is clamped on the upper surface of the air duct, the lower fixed plate is clamped on the lower surface of the air duct, the damping spring is movably sleeved on the sleeve and positioned between the upper fixed plate and the hexagonal nut and between the lower fixed plate and the hexagonal nut and is arranged on the top of the building indoor through the screw suspension post, the fixed air duct is clamped through the upper fixing plate and the lower fixing plate, the upper fixing plate and the lower fixing plate are slidably mounted on the threaded suspension post through the sleeve, a certain moving space exists when the air duct vibrates, the sleeve is fixed on the threaded suspension post through the hexagonal nut, and the damping is performed through the damping spring when the air duct vibrates.

As a preferred technical scheme of the ventilation device for building automatic control of the utility model, the air inlet unit comprises an air inlet plate, a circular through hole, a clamping plate, a storage sleeve and a first mounting bolt, the air inlet plate is of a rectangular plate structure, four corners of the air inlet plate are fixedly mounted on the lower surface of the air duct through the first mounting bolt, the air inlet plate completely seals the air inlet, the clamping plate is of a rectangular plate structure, the clamping plate can be completely inserted into the air inlet, the centers of the air inlet plate and the clamping plate are provided with the circular through hole from top to bottom, the storage sleeve is of a cylindrical structure with a hollow upper part and a hollow lower part which are provided with openings, the lower end of the storage sleeve is fixedly mounted on the upper surface of the clamping plate and contains the circular through hole inside, the circular through hole, the clamping plate and the storage sleeve are fixed through the air inlet plate and the first mounting bolt, and the disassembly and maintenance are convenient, come into the air to the wind channel through circular through-hole, come closely to fix the inlet air board through the cardboard, install and accomodate air inlet extension unit through accomodating the sleeve.

As the utility model discloses a building is preferred technical scheme of ventilation unit for automatic control, air inlet extension unit contains flexible tuber pipe, accomodates ring and pull ring, the upper end fixed mounting of flexible tuber pipe is on accomodating telescopic inside upper end, and in flexible tuber pipe can accomodate into accomodating sleeve completely, accomodate ring fixed mounting on the lower extreme of flexible tuber pipe, accomodate in the ring can accomodate into circular through-hole completely, pull ring fixed mounting is on the lower surface of accomodating the ring, prolongs circular through-hole through flexible tuber pipe, comes flexible tuber pipe fixed accomodating in accomodating sleeve through accomodating the ring, conveniently stimulates through the pull ring and accomodates the ring.

As the utility model discloses a preferred technical scheme of ventilation unit for building automatic control, accomodate and inhale through magnetism between the inside wall of ring and circular through-hole and be connected, conveniently accomodate accomodating of ring through the mode of magnetism.

As the utility model discloses a building is preferred technical scheme of ventilation unit for automatic control, the air-out unit contains fixed frame, pivot, blocks strip and second construction bolt, the four corners of fixed frame passes through second construction bolt fixed mounting on the leading flank in wind channel, and wraps up the air outlet inside it completely, the pivot is from a left side to right fixed mounting on the inside upper end of fixed frame, it has a plurality of to block the strip, and a plurality of blocks the strip from a left side to right fixed mounting in the inside of fixed frame, and from last evenly distributed down, comes fixed mounting pivot and blocks the strip through fixed frame and second construction bolt, installs the closure plate through the pivot, prevents through blocking the strip that the foreign matter from getting into the wind channel in, is used for restricting the position that covers of closure plate simultaneously.

As the utility model discloses a building is preferred technical scheme of ventilation unit for automatic control, the closing plate contains apron and rotating sleeve, rotating sleeve fixed mounting is on the upper end of apron, the rotating sleeve activity cup joints in the pivot, the apron can seal the inside of fixed frame completely, and is located the front side that blocks the strip, makes the upper end of apron can rotate through rotating sleeve, through the self gravity of apron, can make the air outlet apron seal the inside of fixed frame when not going out the air.

The utility model has the advantages that: the utility model communicates the indoor and the external environment of the building through the air duct, thereby discharging the air in the building, hanging and connecting the air duct through the mounting structure and mounting the air duct on the indoor top of the building, sucking the air in the building through the air inlet unit, extending the air inlet unit through the air inlet extension unit, performing key suction on the corresponding indoor air region of the building, discharging the air in the building through the air outlet unit, simultaneously blocking foreign matters from entering the air duct, closing the air outlet unit when not discharging the air in the building through the closing plate, entering the air into the air duct through the air inlet, discharging the air in the air duct through the air outlet, circulating the air in the air duct through the fan, mounting on the indoor top of the building through the threaded suspension posts, clamping the fixed air duct through the upper fixing plate and the lower fixing plate, the upper fixing plate and the lower fixing plate are slidably arranged on the threaded lifting column through a sleeve, a certain moving space is reserved when the air duct vibrates, the sleeve is fixed on the threaded lifting column through a hexagonal nut, the air duct is damped through a damping spring when the air duct vibrates, the circular through hole, the clamping plate and the accommodating sleeve are fixed through the air inlet plate and the first mounting bolt, the air inlet plate and the air inlet extension unit are conveniently dismounted and maintained, air enters the air duct through the circular through hole, the air inlet plate is tightly fixed through the clamping plate, the air inlet extension unit is installed and accommodated through the accommodating sleeve, the circular through hole is extended through the telescopic air pipe, the telescopic air pipe is fixedly accommodated in the accommodating sleeve through the accommodating ring, the accommodating ring is conveniently pulled through a pull ring, the accommodating ring is conveniently accommodated through a magnetic attraction mode, and the rotating shaft and the stop strip are fixedly arranged through the fixing frame and the second mounting bolt, the sealing plate is installed through the rotating shaft, foreign matters are prevented from entering the air duct through the blocking strips, the covering position of the sealing plate is limited, the upper end of the cover plate can rotate through the rotating sleeve, and the cover plate can seal the inside of the fixed frame when the air outlet does not discharge air through the self gravity of the cover plate.

Drawings

FIG. 1 is a schematic view of the present invention;

FIG. 2 is a schematic view of the air duct structure of the present invention;

fig. 3 is a schematic structural view of a sectional view of the air duct of the present invention;

fig. 4 is a schematic view of the mounting structure of the present invention;

FIG. 5 is a schematic view of the structure of the air intake unit of the present invention;

FIG. 6 is a schematic view of the lower structure of the air intake unit of the present invention;

FIG. 7 is a schematic view of the structure of the intake air extension unit of the present invention;

fig. 8 is a schematic view of the structure of the air outlet unit of the present invention;

fig. 9 is a schematic structural view of the closing plate of the present invention.

In the figure: 1-air duct, 101-air inlet, 102-air outlet, 103-fan, 2-mounting structure, 21-threaded hanging column, 22-upper fixing plate, 23-lower fixing plate, 24-sleeve, 25-hexagonal nut, 26-damping spring, 3-air inlet unit, 31-air inlet plate, 32-circular through hole, 33-clamping plate, 34-storage sleeve, 35-first mounting bolt, 4-air inlet extension unit, 41-telescopic air pipe, 42-storage ring, 43-pull ring, 5-air outlet unit, 51-fixing frame, 52-rotating shaft, 53-blocking strip, 54-second mounting bolt, 6-sealing plate, 61-cover plate and 62-rotating sleeve.

Detailed Description

Example 1

As shown in fig. 1 to 9, the utility model discloses a ventilation device for building automatic control, which adopts the technical proposal that the ventilation device comprises an air duct 1, a mounting structure 2, an air inlet unit 3, an air inlet extension unit 4, an air outlet unit 5 and a sealing plate 6; the air duct 1 is of a hollow cuboid structure, an air inlet 101 is formed in the lower surface of the rear end of the air duct 1, an air outlet 102 is formed in the front side surface of the air duct 1, a fan 103 is arranged in the air duct 1, and an output port of the fan 103 faces the air outlet 102; the mounting structure 2 is mounted in the middle of the air duct 1; the air inlet extension unit 4 is arranged at the air inlet 101 through the air inlet unit 3; the sealing plate 6 is installed at the air outlet 102 through the air outlet unit 5, the air duct 1 is hung and installed on the top of the building room through the installation structure 2, the air in the building room is sucked through the air inlet unit 3, the air inlet unit 3 is extended through the air inlet extension unit 4, the corresponding air area in the building room can be sucked in a key mode, the air in the building room is discharged through the air outlet unit 5 and is used for preventing foreign matters from entering the air duct 1, the air outlet unit 5 is sealed when the air in the building room is not discharged through the sealing plate 6, the air enters the air duct 1 through the air inlet 101, the air in the air duct 1 is discharged through the air outlet 102, the air in the air duct 1 is circulated through the fan 103, and the fan 103 is started, air in the building room enters the air duct 1 from the air inlet 101 through the air inlet extension unit 4 and the air inlet unit 3, and then is exhausted from the air outlet 102 through the air outlet unit 5 and the closing plate 6.

As the preferred technical scheme of the ventilation unit for building automatic control of the utility model, the mounting structure 2 contains screw thread davit 21, an upper fixed plate 22, a lower fixed plate 23, two sleeves 24, a hexagonal nut 25 and a damping spring 26, the screw thread davit 21 has two, two screw thread davits 21 are respectively located symmetrically at the left and right sides of the air duct 1, the sleeves 24 are movably sleeved at the two ends of the upper fixed plate 22, the sleeves 24 are movably sleeved at the two ends of the lower fixed plate 23, the hexagonal nut 25 is fixedly sleeved on the outer end of the sleeves 24, the sleeves 24 are sleeved on the screw thread davit 21, the hexagonal nut 25 is screwed on the screw thread davit 21, the upper fixed plate 22 is clamped on the upper surface of the air duct 1, the lower fixed plate 23 is clamped on the lower surface of the air duct 1, the damping spring 26 is movably sleeved on the sleeves 24 and is located between the upper fixed plate 22 and the hexagonal nut 25, and between the lower fixing plate 23 and the hexagonal nut 25, install on the indoor roof of the building through the threaded davit 21, clamp the fixed wind channel 1 through the upper fixing plate 22 and the lower fixing plate 23, mount the upper fixing plate 22 and the lower fixing plate 23 on the threaded davit 21 through the sleeve 24 in a sliding manner, make the wind channel 1 have certain activity space when producing vibrations, fix the sleeve 24 on the threaded davit 21 through the hexagonal nut 25, damp through the damping spring 26 when the wind channel 1 produces vibrations, fix the upper ends of the two threaded davits 21 on the appropriate position of the indoor roof of the building through the expansion screw, screw the two hexagonal nuts 25 to the upper sleeve 24 to the threaded davit 21, movably sleeve the left and right ends of the upper fixing plate 22 on the sleeve 24 respectively, the upper fixing plate 22 contacts with the wind channel damping spring 26, then lift the outer wall 1, stretch the air outlet 102 out of the wall of the building, the proper position of the upper surface of the air duct 1 is contacted with the lower surface of the upper fixing plate 22, the left end and the right end of the lower fixing plate 23 are respectively movably sleeved on the sleeve 24, the lower fixing plate 23 is contacted with the damping spring 26, the two hexagonal nuts 25 are screwed upwards to the lower sleeve 24 to the threaded hanging column 21, the lower fixing plate 23 is contacted with the lower surface of the air duct 1, the air duct 1 is clamped by the upper fixing plate 22 and the lower fixing plate 23, and the air duct 1 is fixed.

As the utility model discloses a preferred technical scheme of ventilation unit for building automatic control, air inlet unit 3 contains air inlet plate 31, circular through-hole 32, cardboard 33, accomodates sleeve 34 and first construction bolt 35, air inlet plate 31 is the rectangle platelike structure, the four corners of air inlet plate 31 is through first construction bolt 35 fixed mounting on the lower surface in wind channel 1, and air inlet plate 31 seals air intake 101 completely, cardboard 33 is the rectangle platelike structure, cardboard 33 can fill in air intake 101 completely, circular through-hole 32 has been seted up from last to down in air inlet plate 31 and the center department of cardboard 33, accomodate sleeve 34 and be inside hollow upper and lower two open-ended cylindric structure, accomodate sleeve 34's lower extreme fixed mounting on cardboard 33's upper surface, and contain circular through-hole 32 inside, fix circular through-hole 32, through air inlet plate 31 and first construction bolt 35, Cardboard 33 and storage sleeve 34, the maintenance of conveniently dismantling simultaneously comes the air that gets into in to wind channel 1 through circular through-hole 32, comes closely to fix air inlet plate 31 through cardboard 33, installs and accomodate air inlet extension unit 4 through accomodating sleeve 34, and the indoor air of building gets into from air inlet extension unit 4 and accomodates in sleeve 34, follows afterwards and accomodates in sleeve 34 gets into wind channel 1.

As a preferred technical solution of the building self-control ventilation device of the present invention, the air intake extension unit 4 comprises a telescopic air duct 41, a receiving ring 42 and a pulling ring 43, the upper end of the telescopic air duct 41 is fixedly mounted on the upper end of the interior of the receiving sleeve 34, the telescopic air duct 41 can be completely received in the receiving sleeve 34, the receiving ring 42 is fixedly mounted on the lower end of the telescopic air duct 41, the receiving ring 42 can be completely received in the circular through hole 32, the pulling ring 43 is fixedly mounted on the lower surface of the receiving ring 42, the circular through hole 32 is extended by the telescopic air duct 41, the telescopic air duct 41 is fixedly received in the receiving sleeve 34 by the receiving ring 42, the receiving ring 42 is conveniently pulled by the pulling ring 43, the receiving ring 42 is connected with the inner side wall of the circular through hole 32 by magnetic attraction, the receiving ring 42 is conveniently received by the magnetic attraction, air in the building room enters from the lower part of the telescopic air pipe 41 through the containing ring 42 and then enters the air duct 1 from the upper end of the containing sleeve 34, when the air at the corresponding position needs to be extracted and exhausted, the pull ring 43 is grasped, the containing ring 42 is pulled out from the inside of the circular through hole 32, the telescopic air pipe 41 extends, and the lower end of the telescopic air pipe 41 extends to the position needing to be extracted and then is extracted.

As a preferred technical solution of the ventilation device for building automatic control of the present invention, the air outlet unit 5 comprises a fixing frame 51, a rotating shaft 52, a blocking strip 53 and a second mounting bolt 54, four corners of the fixing frame 51 are fixedly mounted on the front side of the air duct 1 through the second mounting bolt 54, and completely wrap the air outlet 102 inside the fixing frame, the rotating shaft 52 is fixedly mounted on the upper end of the inside of the fixing frame 51 from left to right, the blocking strip 53 has a plurality of blocking strips 53, the blocking strips 53 are fixedly mounted inside the fixing frame 51 from left to right and are uniformly distributed from top to bottom, the rotating shaft 52 and the blocking strips 53 are fixedly mounted through the fixing frame 51 and the second mounting bolt 54, the sealing plate 6 is mounted through the rotating shaft 52, foreign matters are prevented from entering the air duct 1 through the blocking strips 53, and are used for limiting the position where the sealing plate 6 covers, the sealing plate 6 comprises a cover plate 61 and a rotating sleeve 62, the rotating sleeve 62 is fixedly arranged on the upper end of the cover plate 61, the rotating sleeve 62 is movably sleeved on the rotating shaft 52, the cover plate 61, which is capable of completely closing the inside of the fixed frame 51, is located at the front side of the blocking strip 53, the upper end of the cover 61 can be rotated by the rotating sleeve 62, the cover 61 can close the inside of the fixed frame 51 when the air outlet 102 is not exhausted by the self-gravity of the cover 61, the fan 103 blows air to the air outlet 102, the rotating sleeve 62 rotates on the rotating shaft 52, the lower end of the cover 61 is lifted, the inside of the fixed frame 51 is opened, the air exhausted from the building is exhausted to the outside environment from the inside of the fixed frame 51, when ventilation in the building is not required, the cover plate 61 falls by its own weight, the inner surface of the cover plate 61 stops contacting the stopper 53, and the cover plate 61 closes the inner space of the fixing frame 51.

The utility model discloses a theory of operation: the upper ends of two threaded hanging columns 21 are fixedly arranged at proper positions of the indoor top of a building through expansion screws, two hexagonal nuts 25 are screwed downwards to an upper sleeve 24 to be screwed on the threaded hanging columns 21, the left end and the right end of an upper fixing plate 22 are respectively movably sleeved on the sleeve 24, the upper fixing plate 22 is contacted with a damping spring 26, then an air duct 1 is lifted, an air outlet 102 extends out of the outer wall of the building, the proper position of the upper surface of the air duct 1 is contacted with the lower surface of the upper fixing plate 22, the left end and the right end of a lower fixing plate 23 are respectively movably sleeved on the sleeve 24, the lower fixing plate 23 is contacted with the damping spring 26, two hexagonal nuts 25 are screwed upwards to the lower sleeve 24 to be screwed on the threaded hanging columns 21, the lower fixing plate 23 is contacted with the lower surface of the air duct 1, the air duct 1 is clamped by the upper fixing plate 22 and the lower fixing plate 23, a fan 103 is started, air in the building enters from the lower parts of telescopic air ducts 41 through a containing ring 42, then, the air enters the air duct 1 from the upper end of the storage sleeve 34, when the air at the corresponding position needs to be extracted and exhausted, the pull ring 43 is grasped, the storage ring 42 is pulled out from the inside of the circular through hole 32, the telescopic air pipe 41 is extended, the lower end of the telescopic air pipe 41 is extended to the position needing to be extracted and then extracted, the fan 103 blows air to the air outlet 102, the rotary sleeve 62 rotates on the rotary shaft 52, the lower end of the cover plate 61 is lifted, the inside of the fixed frame 51 is opened, the air exhausted from the building interior is exhausted to the external environment from the inside of the fixed frame 51, when the air ventilation in the building interior is not needed, the cover plate 61 falls down by the self gravity, the inner side surface of the cover plate 61 contacts the barrier strip 53 to stop, and the cover plate 61 seals the internal space of the fixed frame 51.

The utility model relates to a circuit connection is the conventional means that technical staff adopted in this field, and accessible limited number of tests obtains the technological inspiration, belongs to the widely used prior art.

Components not described in detail herein are prior art.

Although the present invention has been described in detail with reference to the specific embodiments, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge range of those skilled in the art, and modifications or variations without creative efforts are still within the scope of the present invention.

Claims

1. A ventilation device for building automatic control is characterized by comprising an air duct (1), a mounting structure (2), an air inlet unit (3), an air inlet extension unit (4), an air outlet unit (5) and a sealing plate (6); the air duct (1) is of a hollow cuboid structure, an air inlet (101) is formed in the lower surface of the rear end of the air duct (1), an air outlet (102) is formed in the front side surface of the air duct (1), a fan (103) is arranged in the air duct (1), and an output port of the fan (103) faces the air outlet (102); the mounting structure (2) is mounted in the middle of the air duct (1); the air inlet extension unit (4) is arranged at the air inlet (101) through the air inlet unit (3); the closing plate (6) is arranged at the air outlet (102) through the air outlet unit (5).

2. The building automatic control ventilation device as claimed in claim 1, wherein: the mounting structure (2) comprises two threaded hanging columns (21), an upper fixing plate (22), a lower fixing plate (23), sleeves (24), hexagonal nuts (25) and damping springs (26), the two threaded hanging columns (21) are respectively and symmetrically positioned on the left side and the right side of the air duct (1), the sleeves (24) are movably sleeved at the two ends of the upper fixing plate (22), the sleeves (24) are movably sleeved at the two ends of the lower fixing plate (23), the hexagonal nuts (25) are fixedly sleeved on the outer ends of the sleeves (24), the sleeves (24) are sleeved on the threaded hanging columns (21), the threads of the hexagonal nuts (25) are screwed on the threaded hanging columns (21), the upper fixing plate (22) is clamped on the upper surface of the air duct (1), the lower fixing plate (23) is clamped on the lower surface of the air duct (1), and the damping springs (26) are movably sleeved on the sleeves (24), and is positioned between the upper fixing plate (22) and the hexagonal nut (25), and between the lower fixing plate (23) and the hexagonal nut (25).

3. The building automatic control ventilation device as claimed in claim 2, wherein: the air inlet unit (3) comprises an air inlet plate (31), a circular through hole (32), a clamping plate (33), a receiving sleeve (34) and a first mounting bolt (35), the air inlet plate (31) is of a rectangular plate-shaped structure, four corners of the air inlet plate (31) are fixedly arranged on the lower surface of the air duct (1) through first mounting bolts (35), the air inlet (101) is completely sealed by the air inlet plate (31), the clamping plate (33) is of a rectangular plate-shaped structure, the clamping plate (33) can be completely plugged into the air inlet (101), the centers of the air inlet plate (31) and the clamping plate (33) are provided with circular through holes (32) from top to bottom, the storage sleeve (34) is a cylindrical structure with a hollow inner part and an upper opening and a lower opening, the lower end of the storage sleeve (34) is fixedly installed on the upper surface of the clamping plate (33), and the circular through hole (32) is contained in the storage sleeve.

4. A building ventilation device as claimed in claim 3, wherein: the air inlet extension unit (4) comprises a telescopic air pipe (41), a storage ring (42) and a pull ring (43), the upper end of the telescopic air pipe (41) is fixedly mounted at the upper end of the interior of the storage sleeve (34), the telescopic air pipe (41) can be completely stored in the storage sleeve (34), the storage ring (42) is fixedly mounted at the lower end of the telescopic air pipe (41), the storage ring (42) can be completely stored in the circular through hole (32), and the pull ring (43) is fixedly mounted on the lower surface of the storage ring (42).

5. The building automatic control ventilation device of claim 4, characterized in that: accomodate and connect through magnetism between ring (42) and the inside wall of circular through-hole (32).

6. The building automatic control ventilation device as claimed in claim 5, wherein: air-out unit (5) contain fixed frame (51), pivot (52), block strip (53) and second construction bolt (54), the four corners of fixed frame (51) passes through second construction bolt (54) fixed mounting on the leading flank in wind channel (1), and wraps up air outlet (102) inside it completely, pivot (52) are from a left side to right side fixed mounting on the inside upper end of fixed frame (51), it has a plurality of to block strip (53), and a plurality of blocks strip (53) from a left side to right side fixed mounting in the inside of fixed frame (51), and from last evenly distributed extremely down.

7. The building automatic control ventilation device as claimed in claim 6, wherein: the closing plate (6) contains apron (61) and rotation sleeve pipe (62), rotation sleeve pipe (62) fixed mounting is on the upper end of apron (61), rotation sleeve pipe (62) activity cup joints on pivot (52), apron (61) can be totally sealed the inside of fixed frame (51), and is located the front side that blocks strip (53).