CN109489145A - A kind of bypass type central air-conditioning ventilating and purifying air system and method - Google Patents
A kind of bypass type central air-conditioning ventilating and purifying air system and method Download PDFInfo
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- CN109489145A CN109489145A CN201910005498.3A CN201910005498A CN109489145A CN 109489145 A CN109489145 A CN 109489145A CN 201910005498 A CN201910005498 A CN 201910005498A CN 109489145 A CN109489145 A CN 109489145A
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- air
- conditioning
- exhausting duct
- dust
- central air
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/16—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by purification, e.g. by filtering; by sterilisation; by ozonisation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/50—Air quality properties
- F24F2110/64—Airborne particle content
Abstract
The embodiment of the invention discloses a kind of bypass type central air-conditioning ventilating and purifying air system and method, the bypass type central air-conditioning ventilating and purifying air system includes: air-conditioner set system, high-pressure blast knife system, bypass filtration system, monitor control system and decontamination system；When monitor control system monitoring central air-conditioning exhausting duct needs dedusting, air-conditioner set is closed, bypass filtration system, high-pressure blast knife system and decontamination system are successively opened, high pressure gas is generated by the air compressor machine of high-pressure blast knife system, high pressure gas is blown to exhausting duct by multiple air blade devices, while decontamination system sprays disinfectant into exhausting duct；Dust and high pressure gas in exhausting duct carry out being mixed to get mixed gas, it is discharged after being filtered by by-pass line, so as to solve the problems, such as that the dedusting of central air-conditioning is not thorough not in time, clean-up effect is improved, it is therefore prevented that secondary pollution of the dust gaseous mixture to air-conditioner set.
Description
Technical field
The present invention relates to air-conditioning technical fields, and in particular to a kind of bypass type central air-conditioning ventilating and purifying air system and method.
Background technique
Existing central air conditioning, central air-conditioning air hose generally use personnel or robot cleans, this mode is not only
It will cause a large amount of cost of labor, can also seriously affect construction quality.Existing technology can not to ventilating system for central air-conditioner into
Row cleaning comprehensively, and can only be cleaned for partial region, and be unable to effective monitoring and handle in real time, it can not also accomplish ventilation duct
The purification of road adequate disinfection, this can threaten the health for being chronically at the personnel such as public place work, life, it is therefore necessary to develop
It is a set of completely new, suitable for existing environment and can be to the facility that air-conditioning duct is cleaned comprehensively.
Summary of the invention
For this purpose, the embodiment of the present invention provides a kind of bypass type central air-conditioning ventilating and purifying air system and method, it is existing to solve
Have the dust removal method cost of labor of central air-conditioning is big, inefficiency not in time with remove dust and be not thorough the problems such as unhygienic.
To achieve the goals above, the embodiment of the present invention provides a kind of bypass type central air-conditioning ventilating and purifying air system, described
Bypass type central air-conditioning ventilating and purifying air system includes: air-conditioner set, air inlet duct, exhausting duct, air compressor machine, by-pass line, bypass wind
Machine, filter, multiple air blade devices；
The air compressor machine is arranged in air-conditioner set, and the entrance of the air compressor machine and high-voltage tube connects, the high-voltage tube
Outlet is connect with multiple air blade devices；In the exhausting duct of multiple centrally disposed air-conditionings of the air blade device；The bypass
Pipeline is respectively communicated with the air inlet duct and exhausting duct, and the bypass blower and filter are successively set in the by-pass line；
When the central air-conditioning is in dedusting mode, the air compressor machine generates high pressure gas, and the high pressure gas passes through
High-voltage tube is delivered to multiple air blade devices；The high pressure gas is blown to the exhausting duct by multiple air blade devices；The row
Dust and the high pressure gas in air duct carry out being mixed to get mixed gas, pumping of the mixed gas in the bypass blower
Suction effect is lower into by-pass line and by being discharged after filter filtering.
Preferably, the bypass type central air-conditioning ventilating and purifying air system further includes monitor control system, the monitoring control
System includes dust monitor, signal transmission feedback system and controlling terminal, the dust monitor real-time detection exhausting duct powder
Dirt cumulant, and feedback system is transmitted by signal and feeds back to controlling terminal, when the dust monitor detects exhausting duct powder
When dirt cumulant is more than predetermined threshold, the controlling terminal controls the central air-conditioning and switches to dedusting mode by operating mode.
Preferably, the bypass type central air-conditioning ventilating and purifying air system further includes decontamination system, and the decontamination system includes
Dosing pump, administration pipeline and multiple disinfection nozzles, the disinfection nozzle are installed in the exhausting duct；
When the central air-conditioning is in dedusting mode, the dosing pump is supplied disinfectant to described by administration pipeline
Nozzle is sterilized, disinfection nozzle injection disinfectant is into the mixed gas.
Preferably, the disinfection arrangement of nozzles the air blade device opposite side and prolong exhausting duct extending direction and mutually hand over
Spray angle for interval setting, and the disinfection nozzle is -45 ° to 0 ° of the disinfection nozzle and air blade device line direction
Between.
Preferably, the multiple air blade device is spaced apart from each other the bottom that the exhausting duct is arranged in；
Multiple air outlets are provided on the exhausting duct, when the central air-conditioning is in dedusting mode, it is multiple it is described go out
Air port is in close state；When the central air-conditioning is in operating mode, multiple air outlets are in the open state.
Preferably, the air inlet of the air-conditioner set and exhaust outlet are separately installed with the first air-valve and the second air-valve, described
By-pass line includes the first interface and second interface positioned at pipe ends, and the first interface is connected to the air inlet duct, institute
Second interface is stated to be connected to the exhausting duct, the first interface, the first air-valve, air-conditioner set, the second air-valve, second interface according to
Secondary arrangement.
Preferably, after the central air-conditioning enters dedusting mode, when the dust monitor detects that exhausting duct dust is tired
When accumulated amount is lower than second threshold, the controlling terminal controls the central air-conditioning by dedusting pattern switching to operating mode.
Particularly, the second threshold is much smaller than the first threshold, to ensure that dust separation is completely thorough.
The embodiment of the present invention also proposed a kind of dust removal method of bypass type central air-conditioning ventilating and purifying air system, the dedusting
Method includes:
Air-conditioner set is closed, the air outlet of the first air-valve, the second air-valve and exhausting duct is closed, opens air compressor machine, dosing pump
With bypass blower；
The air compressor machine generates high pressure gas, and high pressure gas is delivered to multiple air blade devices by high-voltage tube；Multiple air knives
High pressure gas is blown to exhausting duct by device；Dust and high pressure gas in exhausting duct carry out being mixed to get mixed gas；
Dosing pump pumps disinfectant to disinfection nozzle and sprays, and the disinfectant is sufficiently mixed with the mixed gas, passes through
The accurate setting for sterilizing the position, spray angle and eject momentum of nozzle, fills the disinfectant with the mixed gas
Divide and be mixed to form colloid, takes the dust wrapped up in the exhausting duct so that the mixed gas be made sufficiently to roll up and disappear to pipeline
Poison purification；
The mixed gas is led to by-pass line by the bypass blower, by filter filter mixed gas, and by into
Air duct discharge.
The embodiment of the present invention at least has the advantages that
1, high pressure gas is generated by air compressor machine, high pressure gas is delivered to multiple air blade devices by high-voltage tube；Multiple wind
High pressure gas is blown to air piping by knife system；Dust and high pressure gas in air piping carry out being mixed to get mixed gas, pass through
Filter filters mixed gas；Filtered mixed gas is discharged by blower, removing for central air-conditioning can be efficiently solved
Dust collecting method cost of labor is big, inefficiency and removes the halfway problem of dust；
2, by dust monitor real-time inspection and control, dust can be made to be cleared up in time；
3, it is used cooperatively by disinfection nozzle and air blade device, improves the clean-up effect to the exhausting duct；
4, secondary pollution of the dust gaseous mixture to air-conditioner set is prevented by way of bypass filtering.
Detailed description of the invention
It, below will be to embodiment party in order to illustrate more clearly of embodiments of the present invention or technical solution in the prior art
Formula or attached drawing needed to be used in the description of the prior art are briefly described.It should be evident that the accompanying drawings in the following description is only
It is merely exemplary, it for those of ordinary skill in the art, without creative efforts, can also basis
The attached drawing of offer, which is extended, obtains other implementation attached drawings.
Structure depicted in this specification, ratio, size etc., only to cooperate the revealed content of specification, for
Those skilled in the art understands and reads, and is not intended to limit the invention enforceable qualifications, therefore does not have technical
Essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size are not influencing the function of the invention that can be generated
Under effect and the purpose that can reach, should all still it fall in the range of disclosed technology contents obtain and can cover.
Fig. 1 is a kind of bypass type central air-conditioning ventilating and purifying air system normal mode of operation signal provided in an embodiment of the present invention
Figure；
Fig. 2 is a kind of bypass type central air-conditioning ventilating and purifying air system dedusting pattern diagram provided in an embodiment of the present invention；
Fig. 3 is a kind of air blade device region office of bypass type central air-conditioning ventilating and purifying air system provided in an embodiment of the present invention
Portion's enlarged drawing；
Fig. 4 is a kind of process of the dust removal method of bypass type central air-conditioning ventilating and purifying air system provided in an embodiment of the present invention
Schematic diagram.
In figure:
1- air-conditioner set, 11- air inlet duct, 12- exhausting duct, the first air-valve of 13-, the second air-valve of 14-, 15- air outlet, by 2-
It threads a pipe, 21- bypass blower, 22- filter, 23- first interface, 24- second interface, 3- air compressor machine, 31- high-voltage tube, 32- wind
Knife system, 33- simulation jet-impingement region, 4- dosing pump, 41- administration pipeline, 42- sterilize nozzle, 5- dust monitor.
Specific embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book is understood other advantages and efficacy of the present invention easily, it is clear that described embodiment is the present invention one
Section Example, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present invention.
The term of cited such as "upper", "lower", "left", "right", " centre ", is merely convenient to describe in this specification
Be illustrated, rather than to limit the scope of the invention, relativeness is altered or modified, and is changing technology without essence
It inside holds, when being also considered as the enforceable scope of the present invention.
The present embodiment proposes that a kind of bypass type central air-conditioning ventilating and purifying air system includes:
Air-conditioner set system, high-pressure blast knife system, bypass filtration system, monitor control system and decontamination system；Air conditioner
Group system includes air-conditioner set 1, air inlet duct 11 and exhausting duct 12, there is multiple air outlets 15 on exhausting duct 12；High-pressure blast knife system
Including air compressor machine 3, high-voltage tube 31 and multiple air blade devices 32；Bypass filtration system includes the first air-valve 13, the second air-valve 14, side
Thread a pipe 2, bypass blower 21 and filter 22；Monitor control system includes dust monitor 5, signal transmission feedback system and control
Terminal (not shown) processed；Decontamination system includes dosing pump 4, administration pipeline 41 and multiple disinfection nozzles 42.
Air compressor machine 3 and dosing pump 4 are installed in air-conditioner set 1, air blade device 32, dust monitor 5 and disinfection nozzle 42
It is installed in exhausting duct 12, high-voltage tube 31 connects air compressor machine 3 and air blade device 32, and administration pipeline 41 connects dosing pump 4 and disinfection
Nozzle 42.
The air inlet and exhaust outlet of air-conditioner set are separately installed with the first air-valve 13 and the second air-valve 14, and by-pass line 2 wraps
Include the first interface 23 and second interface 24 positioned at pipe ends, first interface 23 is connected to air inlet duct 11, second interface 24 and
Exhausting duct 12 is connected to, and first interface 23, the first air-valve 13, air-conditioner set 1, the second air-valve 14, second interface 24 are successively arranged.
Bypass blower 21 and filter 22 are arranged in by-pass line 2, and filter 22 is installed on the air inlet of bypass blower 21
Mouth side can bypass blower 21 by the filtering of filter 22 with effective protection.
Dust monitor 5 is installed at second interface 24 and 12 dust cumulant of real-time detection exhausting duct, and passes through signal
Transmission feedback system feeds back to controlling terminal, and controlling terminal is judged according to testing result, controls central air conditioner system just
Switch between normal operating mode and dedusting mode.Dust monitor 5 can be but not limited to image sensor, particulate matter sensors or
Piezoelectric transducer；Signal transmission feedback system can be wire transmission or wireless transmission；Controlling terminal can be but not limited to supervise
Measured center, server or electronic control unit (ECU).
A kind of bypass type central air-conditioning ventilating and purifying air system normal mode of operation such as Fig. 1 institute provided in an embodiment of the present invention
Show, when central air-conditioning is in normal mode of operation, the first air-valve 13, the second air-valve 14, air outlet 15 are opened, and bypass blower
21, air compressor machine 3, dosing pump 4 are closed, and then air-conditioner set 1 starts, and air-conditioner set 1 absorbs outside air alternating temperature from air inlet duct 11
Interior of building is supplied to from the air outlet 15 of exhausting duct 12 after damping.
When dust monitor 5 detects that 12 dust cumulant of exhausting duct is more than first threshold, controlling terminal control center
Air-conditioning enters dedusting mode, as shown in Fig. 2, air-conditioner set 1 stops working, and successively closes the first air-valve 13, the second air-valve 14
With air outlet 15, bypass blower 21, air compressor machine 3 and dosing pump 4 are then successively opened.
Air compressor machine 3 generates high pressure gas, and high pressure gas is delivered to multiple air blade devices 32 by high-voltage tube 31；Multiple air knives
High pressure gas is blown to exhausting duct 12 by device 32；Dust and high pressure gas in exhausting duct 12 carry out being mixed to get mixed gas.
Meanwhile dosing pump 4 is supplied disinfectant to disinfection nozzle 42, the disinfection injection disinfection of nozzle 42 by administration pipeline 41
Into mixed gas, the accurate setting of position, spray angle and eject momentum by sterilizing nozzle 42 makes disinfectant for agent
It is thoroughly mixed to form colloid with mixed gas, so that mixed gas be made sufficiently to roll up the dust taken wrap up in exhausting duct 12 and to pipeline
Carry out disinfection purification.
Disinfection nozzle 42, which is arranged in the opposite side of air blade device 32 and prolongs 12 extending direction of exhausting duct and alternate interval, to be set
It sets, particularly, as shown in figure 3, when the spray angle β of disinfection nozzle 42 is disinfection nozzle 42 and 32 line direction of air blade device
- 45 ° to 0 ° between when, the blending of turbulent flow air mass 33 that disinfectant and air blade device 32 are formed is most abundant, to pass through disinfectant
Microlayer model sufficiently wraps up the dust granule in melt and dissolved mixed gas, homogeneous aerosol is formed, thus utmostly to exhausting duct
12 tube walls carry out disinfection purification.
It bypasses blower 21 and mixed gas is led to by-pass line 2, mixed gas is filtered by filter 22, and by air inlet duct
11 discharges.
And it as shown in figure 4, is controlled when dust monitor 5 detects that 12 dust cumulant of exhausting duct is less than second threshold
Terminal control central air-conditioning is normal mode of operation by dedusting pattern switching, i.e., successively closes dosing pump, air compressor machine, bypass wind
Then machine successively opens the first air-valve, the second air-valve, air outlet and air-conditioner set, so that effectively control dedusting carries out the time, keep away
Exempt from excessive dedusting work.Particularly, it presets second threshold and is much smaller than first threshold, so as to avoid unnecessary starting dedusting work
Make, and keeps single dedusting work clean thorough.It is emphasized that process shown in Fig. 4 is closed loop cycle control, single process
After return start to re-start judgement.
The dust removal method cost of labor that technical solution disclosed by the embodiments of the present invention can effectively solve central air-conditioning is big, effect
The problems such as rate is lowly and removing dust is not thorough not in time, and the clean-up effect to the exhausting duct is improved, while passing through side
Secondary pollution of the dust gaseous mixture to air-conditioner set is prevented by way of filter.
Although above having used general explanation and specific embodiment, the present invention is described in detail, at this
On the basis of invention, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Therefore,
These modifications or improvements without departing from theon the basis of the spirit of the present invention are fallen within the scope of the claimed invention.
Claims (9)
1. a kind of bypass type central air-conditioning ventilating and purifying air system, which is characterized in that the bypass type central air-conditioning dust removal by ventilation system
System includes: air-conditioner set, air inlet duct, exhausting duct, air compressor machine, by-pass line, bypass blower, filter, multiple air blade devices；
The air compressor machine is arranged in air-conditioner set, and the entrance of the air compressor machine and high-voltage tube connects, the outlet of the high-voltage tube
It is connect with multiple air blade devices；In the exhausting duct of multiple centrally disposed air-conditionings of the air blade device；The by-pass line
It is respectively communicated with the air inlet duct and exhausting duct, the bypass blower and filter are successively set in the by-pass line；
When the central air-conditioning is in dedusting mode, the air compressor machine generates high pressure gas, and the high pressure gas passes through high pressure
Pipe is delivered to multiple air blade devices；The high pressure gas is blown to the exhausting duct by multiple air blade devices；The exhausting duct
Interior dust and the high pressure gas carry out being mixed to get mixed gas, and the mixed gas is made in the suction of the bypass blower
Enter by-pass line and by being discharged after filter filtering with lower.
2. a kind of bypass type central air-conditioning ventilating and purifying air system as described in claim 1, which is characterized in that further include monitoring control
System processed, the monitor control system include dust monitor, signal transmission feedback system and controlling terminal, the dust detection
Device real-time detection exhausting duct dust cumulant, and feedback system is transmitted by signal and feeds back to controlling terminal, when the dust is examined
When survey device detects that exhausting duct dust cumulant is more than first threshold, the controlling terminal controls the central air-conditioning by Working mould
Formula switches to dedusting mode.
3. a kind of bypass type central air-conditioning ventilating and purifying air system as described in claim 1, which is characterized in that further include disinfection system
System, the decontamination system include that dosing pump, administration pipeline and multiple disinfection nozzles, the disinfection nozzle are installed on the exhausting duct
In；
When the central air-conditioning is in dedusting mode, the dosing pump is supplied disinfectant to the disinfection by administration pipeline
Nozzle, disinfection nozzle injection disinfectant is into the mixed gas.
4. a kind of bypass type central air-conditioning ventilating and purifying air system as claimed in claim 3, which is characterized in that the disinfection nozzle
It is arranged in the opposite side of the air blade device and alternates interval along exhausting duct extending direction and be arranged, and the disinfection nozzle
Spray angle is between the disinfection nozzle and -45 ° to 0 ° of air blade device line direction.
5. a kind of bypass type central air-conditioning ventilating and purifying air system as claimed in claim 2, which is characterized in that the multiple described
Air blade device is spaced apart from each other the bottom that the exhausting duct is arranged in；
Multiple air outlets are provided on the exhausting duct, when the central air-conditioning is in dedusting mode, multiple air outlets
It is in close state；When the central air-conditioning is in operating mode, multiple air outlets are in the open state.
6. a kind of bypass type central air-conditioning ventilating and purifying air system as described in any one in claim 1-5, which is characterized in that described
The air inlet and exhaust outlet of air-conditioner set are separately installed with the first air-valve and the second air-valve, and the by-pass line includes being located at pipeline
The first interface and second interface at both ends, the first interface are connected to the air inlet duct, the second interface and the air draft
Road connection, the first interface, the first air-valve, air-conditioner set, the second air-valve, second interface are successively arranged.
7. a kind of bypass type central air-conditioning ventilating and purifying air system as claimed in claim 2, which is characterized in that the central air-conditioning
Into after dedusting mode, when the dust monitor detects exhausting duct dust cumulant lower than second threshold, the control
Central air-conditioning described in terminal control is by dedusting pattern switching to operating mode.
8. a kind of bypass type central air-conditioning ventilating and purifying air system as claimed in claim 7, which is characterized in that the second threshold
Much smaller than the first threshold.
9. a kind of dust removal method of bypass type central air-conditioning ventilating and purifying air system as claimed in claim 6, which is characterized in that institute
Stating dust removal method includes:
Air-conditioner set is closed, the air outlet of the first air-valve, the second air-valve and exhausting duct is closed, opens air compressor machine, dosing pump and side
Ventilation blower；
The air compressor machine generates high pressure gas, and high pressure gas is delivered to multiple air blade devices by high-voltage tube；Multiple air blade devices
High pressure gas is blown to exhausting duct；Dust and high pressure gas in exhausting duct carry out being mixed to get mixed gas；
Dosing pump pumps disinfectant to disinfection nozzle and sprays, and the disinfectant is sufficiently mixed with the mixed gas, passes through disinfection
The accurate setting of the position, spray angle and eject momentum of nozzle keeps the disinfectant and the mixed gas sufficiently mixed
Conjunction forms colloid, takes the dust wrapped up in the exhausting duct so that the mixed gas be made sufficiently to roll up and carries out disinfection only to pipeline
Change；
The mixed gas is led to by-pass line by the bypass blower, filters mixed gas by filter, and by air inlet duct
Discharge.
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| CN201910005498.3A CN109489145A (en) | 2019-01-03 | 2019-01-03 | A kind of bypass type central air-conditioning ventilating and purifying air system and method |
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Cited By (5)
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| CN110447625A (en) * | 2019-08-14 | 2019-11-15 | 李翊玮 | The method of mechanical Pesticidal and sterilizing is carried out inside a kind of pair of dust removal by ventilation pipeline |
| CN113020191A (en) * | 2021-04-19 | 2021-06-25 | 李兴华 | Multi-stage driving type suction device for large-space ventilation and dust removal |
| CN113092726A (en) * | 2021-04-12 | 2021-07-09 | 河南卓越建设工程有限公司 | Automatic monitoring devices suitable for prevention and cure of geological disasters |
| CN113294881A (en) * | 2021-05-25 | 2021-08-24 | 中建三局集团(深圳)有限公司 | Air conditioner air duct dust accumulation amount monitoring system and method with early warning function |
| CN114576735A (en) * | 2022-04-07 | 2022-06-03 | 珠海格力节能环保制冷技术研究中心有限公司 | Cleaning assembly, air conditioner and dust removal control method |
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