CN112113300B - Campus fresh air installation method - Google Patents

Abstract

A campus fresh air installation method comprises the following steps of determining the installation position of a fresh air fan; holes are formed in the outer wall body, and protective measures are taken during hole forming so as to avoid pollution to the wall surface caused by hole forming; fixedly mounting a new air fan bracket on a wall surface, and then fixedly mounting a new air fan on the new air fan bracket, so that the new air fan is fixedly mounted on an outer wall body; customizing a fresh air pipeline, and determining the length of the fresh air pipeline according to the environment of a construction site, wherein the air outlet of the fresh air pipeline is not less than 1.8 m; fixedly connecting a fresh air pipeline with a fresh air fan, and fixedly installing a connected fresh air pipe on a wall surface through a pipe clamp; connecting a fresh air fan circuit, fixedly installing a control panel on the inner wall, and controlling the relative height of the control panel between 1.5m and 1.6m when the control panel is installed; the method can improve the installation efficiency of the fresh air fan, unify the installation positions of each classroom, reduce the occupancy rate of indoor space and improve the attractiveness of the classrooms.

Description

Campus fresh air installation method

Technical Field

The invention belongs to the field of fresh air systems, and particularly relates to a campus fresh air installation method.

Background

The fresh air system is a set of independent air processing system consisting of an air supply system and an air exhaust system, and is divided into a pipeline type fresh air system and a pipeline-free fresh air system, wherein the pipeline type fresh air system consists of a fresh air fan and pipeline accessories, outdoor air is purified by the fresh air fan and is led into a room, and the indoor air is exhausted by a pipeline; the ductless fresh air system consists of a fresh air fan, and the fresh air fan is used for purifying outdoor air and guiding the outdoor air into a room; pipeline formula new trend system is more suitable for the industry because the engineering volume is big, large tracts of land office area or classroom are used, and new trend system when office area or classroom use, need reduce the noise as far as possible, the noise that prevents new trend system during operation to produce is to indoor personnel's work, study cause the influence, and, the installation method of new trend system on the market goes on according to installer's custom completely at present, different installers have different installation habits, the position that causes the new trend system in every classroom easily has the deviation, influence indoor aesthetic property.

Disclosure of Invention

In view of the above disadvantages, the technical problem to be solved by the present invention is to provide a campus fresh air installation method, which can effectively unify the installation positions of each classroom, reduce the occupation of indoor space, improve the attractiveness of the classrooms, and reduce the wind noise at the air outlet of the campus fresh air system by adjusting the position relationship between the components.

In order to solve the technical problems, the invention adopts the technical scheme that,

a campus fresh air installation method comprises the following steps,

(1) determining the installation position of a fresh air fan;

(2) forming a hole in the wall body of the outer wall;

(3) fixedly mounting a fresh air fan on an outer wall body;

(4) customizing a fresh air pipeline;

(5) fixedly connecting a fresh air pipeline with a fresh air fan;

(6) connect new trend fan circuit, with control panel fixed mounting on interior wall body.

Further, in the step (1), the installation positions of the fresh air fans are determined at the corners of the wall body or at the two sides of the vertical beam of the wall body.

Further, the trompil slope sets up, and the trompil has outside-in tilt up setting.

Furthermore, the aperture of the opening is 180mm, and the inclination angle of the opening is 2-5 degrees.

Further, after the fresh air fan is installed in the step (3), a maintenance space is reserved above the fresh air fan, and the maintenance space is larger than 600 mm.

Furthermore, the fresh air pipeline in the step (4) comprises a silencing pipe, a main pipeline and a silencing pipeline assembly, wherein the silencing pipeline assembly and the silencing pipe are fixedly arranged on the main pipeline, and the silencing pipe is arranged at the front end of the silencing pipeline assembly.

Further, the hush pipe includes amortization joint, amortization tube shell and amortization piece, and amortization piece fixed mounting is in the amortization tube shell, and amortization joint fixed mounting is at the both ends of amortization tube shell to in being connected to the hush pipe on the main pipeline.

Furthermore, the main pipeline comprises a first bending pipe, a second bending pipe and a bending joint, the first bending pipe and the second bending pipe are connected through the bending joint, and the silencing pipe assembly are fixedly arranged on the second bending pipe.

Further, silence pipe assembly includes pipeline end cover and air outlet, includes two air outlets in the silence pipe assembly at least, and adjacent air outlet interconnect forms the silence pipeline, and pipeline end cover fixed connection is at a side end of silence pipeline, and the main line is connected with the silence pipeline.

Further, the step (5) comprises the following steps,

inserting the connecting pipe into the opening;

(II) connecting the connecting pipe with a fresh air pipeline and a fresh air fan through an elbow;

and (III) opening holes in the air pipe and the wall for gluing and sealing.

The method has the advantages that (1) the method can improve the installation efficiency of the fresh air fan, unify the installation positions of each classroom, reduce the occupancy rate of indoor space and improve the attractiveness of the classrooms.

(2) And be equipped with silence pipeline assembly, hush pipe on the new trend pipeline, can effectively reduce the whole wind on the main line and make an uproar, reduce the noise that new trend system produced to cause the influence to indoor staff, student when reducing new trend system and send wind.

Drawings

Fig. 1 is a sectional view of the installation of the ventilation system.

Fig. 2 is a schematic structural diagram of the indoor air conditioner after the fresh air system is installed.

Fig. 3 is a schematic structural view of the outdoor air conditioner after the fresh air system is installed.

Fig. 4 is a schematic structural view of a fresh air duct.

Fig. 5 is a sectional view of the silencer duct.

Fig. 6 is a sectional view of a mute line.

Fig. 7 is a sectional view of the air outlets connected by a connecting pipe to form a pipeline.

Fig. 8 is a cross-sectional view of the outlet.

Fig. 9 is a schematic view of the present duct.

Reference numerals: hush pipe A, main line B, hush pipe assembly C, new trend fan D, new trend pipeline E, the vertical roof beam F of wall body, trompil G, hush pipe 1, air outlet 2, pipeline end cover 3, first air outlet 4, second air outlet 5, connecting pipe 6, wind gap cover 7, wind gap plug 8, air regulation piece 9, spacing piece 10, sealing ring 11, glue 12, amortization joint 1a, amortization tube shell 2a, amortization piece 3a, first amortization column ring 4a, second amortization column ring 5a, first amortization post 6a, second amortization post 7a, first pipe 1B of buckling, second pipe 2B of buckling, joint 3B buckles.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

A campus fresh air installation method comprises the following steps,

(1) determining the installation position of a fresh air fan;

(2) holes are formed in the outer wall body, and protective measures are taken during hole forming so as to avoid pollution to the wall surface caused by hole forming;

(3) fixedly mounting a new air fan bracket on a wall surface, and then fixedly mounting a new air fan on the new air fan bracket, so that the new air fan is fixedly mounted on an outer wall body;

(4) customizing a fresh air pipeline, and determining the length of the fresh air pipeline according to the environment of a construction site, wherein the air outlet of the fresh air pipeline is not less than 1.8 m;

(5) fixedly connecting a fresh air pipeline with a fresh air fan, and fixedly installing a connected fresh air pipe on a wall surface through a pipe clamp;

(6) and connecting a fresh air fan circuit, fixedly installing a control panel on the inner wall, and controlling the relative height of the control panel between 1.5m and 1.6m during installation.

The method can improve the installation efficiency of the fresh air fan, unify the installation positions of all classrooms, reduce the occupancy rate of indoor space and improve the attractiveness of the classrooms.

In the step (1), the installation position of the fresh air fan is determined at the corner of the wall body, or at two sides of the vertical beam of the wall body, under the general condition, the vertical beam of the wall body is protruded in a classroom, the installation position of the fresh air fan is positioned at the corner or the corner formed by the vertical beam of the wall body, the fresh air pipeline can be conveniently installed subsequently, the indoor corner space can be effectively utilized, the space occupancy rate of the fresh air pipeline is reduced, and the phenomenon that students collide at the corner can be effectively reduced by installing the fresh air pipeline at the corner.

In some preferred modes, the fresh air pipelines are symmetrically arranged at the corners of two sides of the classroom, or the fresh air pipelines are symmetrically arranged at two sides of the vertical beam of the wall body.

The trompil slope sets up, and the trompil has the outside-in upwards slope to set up, and the trompil aperture is 180mm, and the inclination of trompil is 2-5, and the purpose of slope setting is, prevents that the rainwater from flowing into indoor along the fresh air pipeline.

And (4) after the fresh air fan is installed in the step (3), reserving a maintenance space above the fresh air fan, wherein the maintenance space is larger than 600mm, and facilitating subsequent maintenance of the outdoor fresh air fan.

In some preferred modes, the suction fan is arranged below the window board, so that a worker can directly maintain and repair the fan from a window, and further, the position of an air intake of the fresh air fan cannot interfere with the direction of air flow exhausted by an air conditioner external unit, so that the mutual interference between an air conditioning system and a fresh air system can be reduced, the wind noise generated by air convection can be reduced, the requirements on the positions of all the fresh air fans on the whole outer wall facade are further met, the air intake is horizontal and vertical, the positions of the fresh air fans on each floor are consistent, and the whole effect is attractive.

Further, the step (5) comprises the following steps,

inserting the connecting pipe into the open hole, namely, firstly installing the first bent pipe 1b into the open hole;

(II) connecting the connecting pipe with a fresh air pipeline and a fresh air fan through an elbow;

and (III) opening holes in the air pipe and the wall for gluing and sealing, and sealing and waterproofing to prevent water from entering the classroom.

The step (6) comprises the following steps,

(6.1) fixedly mounting the fan bracket on a wall;

(6.2) fixedly mounting the fresh air fan on the fan bracket;

(6.3) a filter screen is arranged in the fresh air fan.

When the fresh air pipeline in the step (4) is manufactured, the cutting opening of the PVC pipe is smooth and has no burrs, the joint of the pipe and the pipe fitting is firmly riveted or bonded, and no residual glue is left on the pipe or the pipe fitting; the pipeline is installed horizontally and vertically, and the inner wall of the pipeline is clean and free of impurities; PVC pipes are fixed at certain intervals, the inner wall of a pipe clamp is tightly attached to the outer wall of the pipe, the pipe clamp and the pipeline are fixed firmly without looseness, the interval between the pipe clamp and each new fan pipeline is consistent, the interval is 1.5 meters, and the pipe clamp is horizontally flat and vertical for two equipment pipelines in each classroom; after the construction of the through-wall pipeline is finished, the gap is filled and repaired, the opening of the wall surface and the pipeline are treated by waterproof sealant, and the coating of the glue requires reliable sealing, attractive appearance and smoothness. The wall surface area can not be polluted; adhesion of tube material and tube: before bonding, trial assembly is carried out, the outer surface of the pipe end of the insertion pipe is about 50mm, the pipe joint is cleaned, the pipe is completely inserted into the joint, the pipe is automatically fixed after standing for 3 minutes, and glue liquid extruded from the joint is timely wiped off to keep the pipe clean. At the moment, the forced rotation direction is forbidden, otherwise, leakage can be caused, and after the pipe and the pipe are bonded, the connecting piece is aligned to be positioned on the same bearing line. The three-way connection must ensure that the side outlets are on the same plane.

The new trend pipeline in step (4) includes hush pipe A, main line B and hush pipe assembly C, hush pipe A all fixed mounting is on main line B, hush pipe A installs the front end at hush pipe assembly C, hush pipe A is used for alleviateing the wind noise of main line B corner, hush pipe assembly C is used for alleviateing the wind noise on the air outlet position, through hush pipe assembly C, hush pipe A's setting, can effectively reduce the whole wind noise on main line B, reduce the noise that new trend system produced, thereby to indoor staff, the student causes the influence when reducing new trend system and sending wind.

Silencing pipe A includes amortization joint 1a, amortization tube 2a and amortization piece 3a, amortization piece 3a fixed mounting is in amortization tube 2a, amortization joint 1a fixed mounting is at the both ends of amortization tube 2a, so that be connected to the main pipeline with the amortization pipe, setting through amortization piece 3a, be convenient for adsorb the noise that forms in the amortization pipe A, reduce the wind noise at this amortization nest of tubes air intake position, and the setting of amortization piece 3, make the area of pipeline inner wall increase, the velocity of flow is lower on the position that is close to the pipe wall for the fluid, thereby reduce the velocity of flow of air in the pipeline, thereby reduce wind noise.

The inner wall of the silencing piece 3a is uniformly connected with a first silencing column ring 4a and a second silencing column ring 5a, the first silencing column ring 4a and the second silencing column ring 5a are arranged in a staggered manner, namely, the second silencing column ring 5a is arranged between the adjacent first silencing column rings 4a, the first silencing column ring 4a is arranged between the adjacent second silencing column rings 5a, the first silencing column ring 4a comprises uniformly distributed first silencing columns 6a, the second silencing column ring 5a comprises uniformly distributed second silencing columns 7a, the first silencing columns 6a and the second silencing columns 7a are also arranged in a staggered manner, namely, the second silencing columns 7a are positioned on the vertical plane between the two first silencing columns 6a, preferably, the silencing piece 3a adopts silencing cotton material, the inner wall area of the piece 3a is increased through the first silencing column rings 4a and the second column rings 5a which are arranged in a staggered manner, so as to reduce the flow speed of silencing air flow, the wind noise is reduced, and due to the staggered arrangement, turbulence can be generated, so that the flow velocity of the airflow is further reduced, and the wind noise is reduced.

In some preferred modes, the diameter of the silencing tube shell 2a is larger than that of the main pipeline B, so that a silencing column on the inner wall of the silencing piece 3a can be prevented from protruding out of the inner wall of the main pipeline B, the end part of the silencing column and the inner wall of the main pipeline B are in the same plane, and air noise of air flow on the silencing column is prevented.

The main pipeline B comprises a first bent pipe 1B, a second bent pipe 2B and a bent joint 3B, the first bent pipe 1B is connected with the second bent pipe 2B through the bent joint 3B, the silencing pipe A and the silencing pipeline component C are fixedly mounted on the second bent pipe 2B, and preferably, the silencing pipe A is close to the bent joint 3B and is arranged, so that wind noise at the bent part of the main pipeline B can be eliminated by the silencing pipe A conveniently.

Silence pipe assembly C includes pipeline end cover 3 and air outlet 2, include two air outlets 2 in the silence pipe assembly C at least, 2 interconnect of adjacent air outlet, form silence pipeline 1, 3 fixed connection of pipeline end cover is at a side end of silence pipeline 1, main line B is connected with silence pipeline 1, wind makes an uproar and produces the reflection when meetting pipeline end cover 3, wind makes an uproar and produces the decay in reflection process, thereby reduce wind and make an uproar, through set up a plurality of air outlets 2 on main line 1, when the air current in main line 1 flows through air outlet 2, form the vortex, wind makes an uproar when through air outlet 2, form the decay, thereby reduce the wind of air outlet 2 department and make an uproar, reduce the noise that new trend system produced.

The air output of the air outlet 2 at the farthest end of the pipeline end cover 3 is less than the air output of other air outlets 2, and through reducing the air output of the air outlet 2 at the farthest end, the air noise can be attenuated when passing through the three-way pipe, and the air flow forms turbulent flow at the air outlet 2 at the farthest end, so that the air noise at other air outlets 2 is reduced.

In this embodiment, two air outlets 2 are fixedly mounted on the main pipe 1, which are respectively the first air outlet 4 and the second air outlet 5, the distance between the first air outlet 4 and the pipe end cover 3 is greater than the distance between the second air outlet 5 and the pipe end cover 3, the air output of the first air outlet 4 is less than the air output of the second air outlet 5, and by reducing the air output of the first air outlet 4, the airflow in the main pipe 1 forms turbulent flow at the position of the first air outlet 4, so as to reduce the wind noise at the second air outlet 2.

Further, for user control, the first air outlet 4 is in a normally closed state, no air is discharged from the first air outlet 4, and when the airflow passes through the first air outlet 4, the airflow speed is reduced, and the wind noise is attenuated, so that the wind noise at the second air outlet 5 is reduced.

First air outlet 4 and second air outlet 5 are through glue 12 fixed connection between, glue 12 adopts the special glue of PVC material, directly is connected first air outlet 4 and second air outlet 5.

Or, the first air outlet 4 and the second air outlet 5 are fixedly connected through a connecting pipe 6, and the distance between the air outlet opening of the first air outlet 4 and the air outlet opening of the second air outlet 5 can be adjusted through the connecting pipe 6.

The air-out orientation of adjacent air outlet 2 is unanimous, promptly, and the port of adjacent air outlet 2 is located the coplanar, prevents that the air current from forming the vortex in main line 1, leads to the vortex effect of farthest end air outlet 2 to weaken, further influences the performance of making an uproar of falling of other air outlets 2.

Air outlet 2 installs wind mask 7, and wind gap cover 7 includes wind gap plug 8, air regulation piece 9, and air regulation piece 9 rotates to be installed in wind gap plug 8, adjusts the air output of wind gap cover 7 through rotating air regulation piece 9, and wind gap plug 8 is removable to be installed at air outlet 2, adjusts the air output of air outlet 2 through sealing plug 8.

Be equipped with spacing piece 10 on the lateral wall of wind gap bayonet joint 8, cover 7 joints in air outlet 2 with the wind gap through spacing piece 10, preferably, spacing piece 10 is flexible rubber material, and the end connection of wind gap bayonet joint 8 has sealing ring 11, through the setting of sealing ring 11, is convenient for improve the sealing performance of wind gap bayonet joint 8 and air outlet 2.

The air outlet 2 is a three-way connecting pipe which can change the cross-sectional area of an airflow flow path, thereby reducing the flow rate of gas and attenuating wind noise.

This silence pipeline structure's the principle of making an uproar is, wind makes an uproar and removes to 3 departments of pipeline end cover through the gas that flows, wind makes an uproar and produces the rebound, wind makes an uproar and can produce the partial decay at the rebound in-process, thereby reduce wind and make an uproar, it is same, the air outlet that will be close to pipeline end cover 3 is closed, can make an uproar equally to wind and carry out the rebound, thereby further reduce wind and make an uproar, the air outlet is three way connection pipe, wind makes an uproar behind three way connection pipe, wind makes an uproar and forms the decay, the setting of the decay is made an uproar through the wind of many places, can be more effectual the wind of reduction air outlet department make an uproar.

When the air conditioner is installed, the distance between the silencing pipe A and the silencing pipeline component C is 0-50cm, the distance between adjacent air outlets in the silencing pipeline component C is 0-10cm, and the distance between the air outlet closest to the pipeline end cover and the pipeline end cover is 8-9 cm.

Example one

During the installation, with hush pipe A and silence pipeline subassembly C lug connection, hush pipe A, silence pipeline subassembly C's connection interval is 0cm promptly, adjacent air outlet lug connection in the sound pipeline subassembly C, and the interval between the air outlet of the top and the pipeline end cover is 8cm to with the air outlet closure of lower extreme, open new trend system after the installation is accomplished, measure the wind noise of air outlet department through the decibel appearance.

Example two

During the installation, the interval between hush pipe A, the silence pipe assembly C is 50cm, adjacent air outlet lug connection in the sound pipe assembly C, and the interval between the air outlet of the top and the pipeline end cover is 8cm to close the air outlet of the bottom, open new trend system after the installation is accomplished, measure the wind noise of air outlet department through the decibel appearance.

EXAMPLE III

During the installation, the interval between muffler pipe A, the silence pipe assembly C is 50cm, and the interval between the adjacent air outlet is 10cm in the sound pipe assembly C, and the interval between the air outlet of the top and the pipeline end cover is 8cm to with the lower extreme air outlet closure, open new trend system after the installation is accomplished, measure the wind noise of air outlet department through the decibel appearance.

Example four

During installation, the interval between muffler pipe A, the silence pipe assembly C is 50cm, and the interval between the adjacent air outlet is 10cm in the sound pipe assembly C, and the interval between the air outlet of the top and the pipeline end cover is 9cm to with the lower extreme air outlet closed, open new trend system after the installation is accomplished, measure the wind noise of air outlet department through the decibel appearance.

Comparative example 1

The fresh air fan blows air indoors directly through the PVC pipe.

Comparative example No. two

During the installation, with hush pipe A and silence pipeline module C lug connection, hush pipe A, silence pipeline module C's connection interval is 0cm promptly, adjacent air outlet lug connection in the sound pipeline module C, and the interval between the top air outlet and the pipeline end cover is 8cm to open the air outlet below completely, open the new trend system after the installation is accomplished, measure the wind noise of air outlet department through the decibel appearance.

Comparative example No. three

During the installation, with hush pipe A and silence pipeline module C lug connection, hush pipe A, silence pipeline module C's connection interval is 100cm promptly, adjacent air outlet lug connection in the sound pipeline module C, and the interval between the top air outlet and the pipeline end cover is 8cm to close the air outlet of lower extreme, open the new trend system after the installation is accomplished, measure the wind noise of air outlet department through the decibel appearance.

Comparative example No. four

During the installation, with hush pipe A and silence pipeline module C lug connection, hush pipe A, silence pipeline module C's connection interval is 0cm promptly, and the interval between the adjacent air outlet is 50cm in the sound pipeline module C, and the interval between the air outlet of the top and the pipeline end cover is 8cm to with the lower extreme air outlet closure, open new trend system after the installation is accomplished, measure the wind noise of air outlet department through the decibel appearance.

Comparative example five

During the installation, with hush pipe A and silence pipeline module C lug connection, hush pipe A, silence pipeline module C's connection interval is 0cm promptly, adjacent air outlet lug connection in the sound pipeline module C, and the interval between the air outlet of the top and the pipeline end cover is 50cm to close the air outlet of bottom, open the new trend system after the installation is accomplished, measure the wind noise of air outlet department through the decibel appearance.

The results of the decibel meter measurements for each of the examples are shown in Table 1-1.

TABLE 1-1

As can be seen from the above table, (1) the wind noise can be effectively reduced by reducing the distance between the silencing pipe a, the silencing pipeline assembly C and the pipeline end cover; (2) the wind noise can be reduced by reducing the distance between the adjacent air outlets in the mute pipeline assembly C; (3) closing the air outlet close to the pipeline end cover can also reduce wind noise.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention; thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Although the terms corresponding to the reference numerals in the figures are used more herein, the possibility of using other terms is not excluded; these terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.

Claims (8)

1. A campus fresh air installation method is characterized by comprising the following steps,

(1) determining the installation position of a fresh air fan;

(2) forming a hole in the wall body of the outer wall;

(3) fixedly mounting a fresh air fan on an outer wall body;

(4) customizing a fresh air pipeline;

(5) fixedly connecting a fresh air pipeline with a fresh air fan;

(6) connecting a fresh air fan circuit, and fixedly installing a control panel on the inner wall;

the fresh air pipeline in the step (4) comprises a silencing pipe (A), a main pipeline (B) and a silencing pipeline assembly (C), wherein the silencing pipeline assembly (C) and the silencing pipe (A) are fixedly arranged on the main pipeline (B), and the silencing pipe (A) is arranged at the front end of the silencing pipeline assembly (C);

the mute pipeline assembly (C) comprises a pipeline end cover and air outlets, the mute pipeline assembly (C) comprises two air outlets which are respectively a first air outlet (4) and a second air outlet (5), the adjacent first air outlet (4) and the second air outlet (5) are connected with each other to form a mute pipeline, the pipeline end cover is fixedly connected to one side end part of the mute pipeline, and the main pipeline (B) is connected with the mute pipeline;

when the device is installed, the distance between the silencing pipe (A) and the silencing pipeline component (C) is 0-50cm, the distance between adjacent air outlets in the silencing pipeline component (C) is 0-10cm, and the distance between the air outlet closest to the pipeline end cover and the pipeline end cover is 8-9 cm;

the first air outlet (4) is in a normally closed state, no air is discharged from the first air outlet (4), and the flow velocity of the air flow is reduced when the air flow passes through the first air outlet (4);

the first air outlet (4) and the second air outlet (5) are fixedly connected through glue (12), or the first air outlet (4) and the second air outlet (5) are fixedly connected through a connecting pipe (6).

2. The campus fresh air installation method of claim 1, wherein in the step (1), the installation positions of the fresh air fans are determined at corners of the wall body or at two sides of the vertical beams of the wall body.

3. The campus fresh air installation method of claim 1, wherein the openings are arranged obliquely, and the openings are arranged obliquely outward and inward and upward.

4. The campus fresh air installation method according to claim 3, wherein the aperture of the opening is 180mm, and the inclination angle of the opening is 2 ° to 5 °.

5. The campus fresh air installation method according to claim 1, wherein after the installation of the fresh air blower in the step (3) is completed, a maintenance space is reserved above the fresh air blower, and the maintenance space is larger than 600 mm.

6. The campus fresh air installation method according to claim 1, wherein the silencing pipe (a) comprises a silencing joint (1 a), a silencing pipe shell (2 a) and a silencing piece (3 a), the silencing piece (3 a) is fixedly installed in the silencing pipe shell (2 a), and the silencing joint (1 a) is fixedly installed at two ends of the silencing pipe shell (2 a) so as to connect the silencing pipe (a) to the main pipeline (B).

7. The campus fresh air installation method according to claim 1, wherein the main pipeline (B) comprises a first bent pipe (1B), a second bent pipe (2B) and a bent joint (3B), the first bent pipe (1B) and the second bent pipe (2B) are connected through the bent joint (3B), and the silencing pipe (A) and the silencing pipe assembly (C) are both fixedly installed on the second bent pipe (2B).

8. The campus fresh air installation method of claim 1, wherein step (5) comprises the steps of,

inserting the connecting pipe into the opening;

(II) connecting the connecting pipe with a fresh air pipeline and a fresh air fan through an elbow;

and (III) opening holes in the air pipe and the wall for gluing and sealing.

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