CN107178293A - A kind of resistance sound deadening capacity adjustable ventilation blinds - Google Patents

A kind of resistance sound deadening capacity adjustable ventilation blinds Download PDF

Info

Publication number
CN107178293A
CN107178293A CN201710441499.3A CN201710441499A CN107178293A CN 107178293 A CN107178293 A CN 107178293A CN 201710441499 A CN201710441499 A CN 201710441499A CN 107178293 A CN107178293 A CN 107178293A
Authority
CN
China
Prior art keywords
noise elimination
frame
sound deadening
blade
deadening capacity
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710441499.3A
Other languages
Chinese (zh)
Inventor
王少云
严加真
高宏俊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHENZHEN KEDE ACOUSTIC TECHNOLOGY Co Ltd
Original Assignee
SHENZHEN KEDE ACOUSTIC TECHNOLOGY Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SHENZHEN KEDE ACOUSTIC TECHNOLOGY Co Ltd filed Critical SHENZHEN KEDE ACOUSTIC TECHNOLOGY Co Ltd
Priority to CN201710441499.3A priority Critical patent/CN107178293A/en
Publication of CN107178293A publication Critical patent/CN107178293A/en
Pending legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06BFIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B7/00Special arrangements or measures in connection with doors or windows
    • E06B7/02Special arrangements or measures in connection with doors or windows for providing ventilation, e.g. through double windows; Arrangement of ventilation roses
    • E06B7/08Louvre doors, windows or grilles
    • E06B7/084Louvre doors, windows or grilles with rotatable lamellae
    • E06B7/086Louvre doors, windows or grilles with rotatable lamellae interconnected for concurrent movement
    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06BFIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B5/00Doors, windows, or like closures for special purposes; Border constructions therefor
    • E06B5/20Doors, windows, or like closures for special purposes; Border constructions therefor for insulation against noise
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/10Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
    • F24F13/14Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
    • F24F13/1426Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre characterised by actuating means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/10Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
    • F24F13/14Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
    • F24F13/15Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre with parallel simultaneously tiltable lamellae
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/24Means for preventing or suppressing noise
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/10Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
    • F24F13/14Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
    • F24F13/1426Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre characterised by actuating means
    • F24F2013/1433Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre characterised by actuating means with electric motors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/24Means for preventing or suppressing noise
    • F24F2013/247Active noise-suppression

Abstract

The invention discloses a kind of resistance sound deadening capacity adjustable ventilation blinds, it includes louver frame, noise elimination blade, the ventilating blind also includes sensor, control terminal, the sensor is arranged at the side of louver frame, with the change of detection temperature and/or wind-force, and the sensor is electrically connected to control terminal, the control terminal is electrically connected with noise elimination blade.The present invention disclosure satisfy that the air intake crushing and acoustic attenuation performance of equipment, and low-carbon, environmental protection, the effect of energy-conservation are reached while having.

Description

A kind of resistance sound deadening capacity adjustable ventilation blinds
Technical field
The invention belongs to silencer technical field, more particularly to a kind of ventilating blind with silencer.
Background technology
With the raising of the living standard and quality of people, there are higher requirement, noise pollution to living environment quality Become emphasis of concern.In many ventilating systems, equipment sends intense noise while air-flow is produced, if It is that should allow air circulation to count teacher and engineer's problems faced, while preventing noise to outdoor propagation again.So relatively low Pressure drop and effective noise reduction requirement be very important evaluation criterion.Simultaneously it is contemplated that architect ask that it is economical, Attractive in appearance, practicality.
The general sound deadening capacity of noise elimination blinds is 5~15dB (A), and acoustic characteristicses are in medium-high frequency, the noise elimination of shutter style silencer Performance depends mainly on the factors such as the form of monolithic blinds, blinds spacing, setting angle and effective noise elimination length.In many factories With shopping centre, the place higher to noise requirements is required for designing the ventilating blind for meeting noise requirements, in order to meet noise Standard, it is ensured that this resistance sound deadening capacity adjustable ventilation blinds that equipment is normally run and invented.
As patent application 201520962717.4 discloses a kind of noise reduction shutter.It is relative in outer framework including outer framework Left frame and left frame between set up be provided between multiple noise elimination flow deflectors, two neighboring noise elimination flow deflector formed supply stream The passage of circulation;The cross sectional shape of noise elimination flow deflector is oval aerofoil profile, the folder between its major axis and the length direction of place frame Angle is 45 ° -65 °;Noise elimination flow deflector includes externally-located housing, has sound-absorption glass cotton in the lumen loading of housing.But should In patent application, noise elimination flow deflector is fixed, can not be adjusted, and this can undoubtedly increase noise elimination blinds under normal circumstances Power consumption, is especially focusing on the modern society of environmental protection and energy saving, it is impossible to meet the demand of people.
The content of the invention
Based on this, therefore the present invention primary mesh be to provide a kind of resistance sound deadening capacity adjustable ventilation blinds, the ventilation Blinds so as to change the ventilation ratio of blinds, and then reaches the adjustable mesh of resistance sound deadening capacity by adjusting the opening angle of blade 's.
It is to provide a kind of resistance sound deadening capacity adjustable ventilation blinds, the ventilating blind can be with another mesh of the present invention According to the different noises produced under the different capacity and frequency of equipment, and under varying environment background, it is adjusted, is set with meeting Standby air intake crushing and acoustic attenuation performance, reach low-carbon, the effect of environmental protection and energy saving.
To achieve the above object, the technical scheme is that:
A kind of resistance sound deadening capacity adjustable ventilation blinds, it includes louver frame, noise elimination blade, it is characterised in that this leads to Wind blinds also includes sensor, control terminal, and the sensor is arranged at the side of louver frame, with detection temperature and/or The change of wind-force, and the sensor is electrically connected to control terminal, the control terminal is electrically connected with noise elimination blade, to control to disappear The angle change of sound blade, reaches that the effect of power consumption is eliminated the noise and reduced in regulation.
Further, the noise elimination blade is connected with adjusting rod, and the adjusting rod is connected to controlled motor, and control terminal is electrically connected It is connected in controlled motor, the change of adjusting rod is adjusted by controlled motor, so that noise elimination blade carries out angular adjustment.
The louver frame is made up of side frame, top margin frame, boundary frame area, plays the fixation to noise elimination blade.
Further, the cross section of the top margin frame isShape structure or cap-shaped structure, so that noise elimination blade can be contained in The lower section of top margin frame, meanwhile, the cross section of the boundary frame area is triangle or chevron structure, so that noise elimination blade can be drawn in In louver frame.
The noise elimination blade is connected on the top margin frame and boundary frame area of louver frame with hinge joint mode, is thus constituted a kind of fair Perhaps air-flow passes through, and eliminates the window structure of noise.
The noise elimination blade is attached using articulated form with louver frame, is hinged in the middle of blade, and two ends are hanging, can be with Rotate, different angles are showed, to realize different ventilation ratios.
The sensor, includes temperature, air quantity, wind pressure sensor thrin or arbitrary combination, with as needed Environment is accurately detected, is easy to control terminal that control is adjusted.
It has been investigated that:At different frequencies, it is necessary to different air intake or exhaust air rate, especially equipment just started when Wait, institute's required airflow is larger.After a certain time of operation, frequency tends towards stability equipment, and this is accomplished by silencing equipment and it is matched somebody with somebody Close.Therefore, the different noises that present invention design can be produced under the different capacity and frequency according to equipment, are adjusted, and control Its ratio of divulging information, to meet the air intake crushing and acoustic attenuation performance of equipment, reaches low-carbon, environmental protection, the purpose of energy-conservation.
The beneficial effects of the invention are as follows:
1st, ventilation ratio can automatically adjust according to air quantity, blast, temperature.The pressure loss is small, soundproof effect is good, effectively The big noise of equipment of noise is solved the problems, such as, treatment cost is reduced.
2nd, silencer and two-in-one, the different noises that can be produced under the different capacity and frequency according to equipment of divulging information, from Dynamic regulation blade, to meet the air intake crushing and acoustic attenuation performance of equipment, meets the different frequency stage needs of frequency conversion equipment system Different air quantity and eliminate the noise requirement.
3rd, the problem of solving high-drag during high air quantity, energy-conservation, low-carbon environment-friendly.
4th, it is simple in construction, it is easy for installation.
Brief description of the drawings
Fig. 1 is the ventilating blind structural representation that the present invention is implemented.
Fig. 2 is the structural representation that the present invention implements louver frame.
Fig. 3 is the structural representation that the present invention implements noise elimination blade.
Fig. 4 is the structural representation of the invention implemented when ventilating blind is opened.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and It is not used in the restriction present invention.
As shown in figure 1, being implemented resistance sound deadening capacity adjustable ventilation blinds by the present invention, it includes louver frame 1, disappeared Sound blade 2, adjusting rod 3, controlled motor 4, sensor 6, computer control terminal 5 (abbreviation computer terminal).Wherein, noise elimination blade 2 In louver frame 1, and adjusting rod 3 is connected with, the adjusting rod 3 is connected to controlled motor 4, and controlled motor 4 is electrically connected to Computer terminal 5, the change of adjusting rod 3 is adjusted by controlled motor 4, so that noise elimination blade carries out angular adjustment.
The sensor 6 is arranged at the side of louver frame 1, with the change of detection temperature and/or wind-force, and the sensing Device 6 is electrically connected to computer terminal 5, and computer terminal 5 is electrically connected with noise elimination blade, to control the angle change of noise elimination blade 2, is reached The effect of power consumption is eliminated the noise and reduced in regulation.
With reference to shown in Fig. 2, louver frame 1 is made up of top margin frame 11 and boundary frame area 13, and two side frames 12, is played and is offseted The fixation of sound blade.
The cross section of top margin frame 11 isShape structure, so that noise elimination blade can be contained in the lower section of top margin frame, meanwhile, bottom The cross section of frame 13 is chevron structure, so that noise elimination blade can be drawn in louver frame.Louver frame 1 is by metallic plate structure Into such as galvanized steel plain sheet, aluminium sheet, copper coin.Louver frame is molded by steel plate bending, and steel plate materialses can select galvanized steel plain sheet, aluminium sheet Or other metallic plates, couple the modes such as optional self-tapping screw, riveting, welding and fix.
Noise elimination blade 2 is as shown in figure 3, be airflow design, it is possible to reduce windage, the effect with lower resistance large noise elimination quantity Really.Under normal circumstances, two noise elimination blades 2 link together, and hinged by intermediate point 21, and the intermediate point 21 is used to It is articulated with adjusting rod 3.The shell of noise elimination blade 2 is made using metallic plate in material, is partly metallic plate, bottom on blade Divide the metallic plate using perforation, punching rate is between 1%~25%, and blade interior can use and be filled or unfilled with sound absorption or resonance wood Material, blade design can be circular, ellipse or diamond structure, and blade is attached using articulated form with louver frame 1, The centre position 21 of i.e. two noise elimination blades 2 is hinged and is connected on adjusting rod 3, and the two ends in two outsides of noise elimination blade 2 are hanging, It can rotate, show different angles, to realize different ventilation ratios, the pressure loss can change therewith.Draught area expands After big, wind speed can also decrease.Under identical wind speed, the pressure loss will be reduced.
In Fig. 2,22 be the top plate of noise elimination blade, belongs to metallic plate, such as galvanized steel plain sheet, aluminium sheet;23 be noise elimination blade Lower plywood, belong to perforated plate, punching rate 1-25%, aperture 0.1-10mm materials are aluminium alloy, steel etc.;Inside 23 is noise elimination leaf The sound-absorbing filler material of piece, such as rock wool, mineral wool, polyester form.
Computer terminal 5, the regulatable control system being made up of PC or single-chip microcomputer etc..
Sensor 6, is a kind of detection means, can experience measured information, and can be by the information experienced, by certain Rule is for conversion into the information output of electric signal or other required forms, to meet the transmission of information, processing, storage, display, remember Record and control etc. are required.Sensor 6 receives signal feedback to the computer terminal 5, can there is the types such as temperature, blast, air quantity.Sensing Device 6 includes temperature, air quantity, wind pressure sensor, and its data Real-time Feedback to computer terminal 5 is controlled by computer terminal 5, The parameters such as temperature, air quantity, blast are included on terminal display screen, as needed, the ventilation ratio to noise elimination blade 2 is adjusted Section (angle of regulation blade), and then larger ventilation ratio is obtained, reduce crushing.
Thus, it is possible to according to the different noises produced under the different capacity and frequency of equipment, and under varying environment background, It is adjusted, to meet the air intake crushing and acoustic attenuation performance of equipment, reaches low-carbon, the effect of environmental protection and energy saving.
It is now relative to noise requirements in the case that device frequency tends towards stability when equipment is static or during normal operation Higher, so resistance adjustable ventilating blind ventilation ratio is smaller, sound deadening capacity is big.As shown in Figure 1;When equipment has just started or frequency When rate increases suddenly, now required ventilation ratio is larger, and sound deadening capacity is smaller.The control noise elimination of computer terminal 3 blade 2 opens, with Increase ventilation ratio, as shown in Figure 4.
The present invention detects outer signals by sensor 6, then signal analysis is carried out through computer terminal 5, according to ring around The situation in border sends corresponding instruction, so as to change the stretching degree of noise elimination blade 2, and then meets equipment in different frequencies It is lower, it is necessary to different air intakes or exhaust air rate air intake crushing and acoustic attenuation performance, and then reach low-carbon, the effect of environmental protection and energy saving.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention Any modifications, equivalent substitutions and improvements made within refreshing and principle etc., should be included in the scope of the protection.

Claims (7)

1. a kind of resistance sound deadening capacity adjustable ventilation blinds, it includes louver frame, noise elimination blade, it is characterised in that the ventilation Blinds also includes sensor, control terminal, and the sensor is arranged at the side of louver frame, with detection temperature and/or wind The change of power, and the sensor is electrically connected to control terminal, the control terminal is electrically connected with noise elimination blade.
2. resistance sound deadening capacity adjustable ventilation blinds as claimed in claim 1, it is characterised in that the noise elimination blade is connected with Adjusting rod, the adjusting rod is connected to controlled motor, and control terminal is electrically connected in controlled motor, is adjusted and adjusted by controlled motor The change of pole, so that noise elimination blade carries out angular adjustment.
3. resistance sound deadening capacity adjustable ventilation blinds as claimed in claim 1, it is characterised in that the louver frame is by side Frame, top margin frame, boundary frame area are constituted.
4. resistance sound deadening capacity adjustable ventilation blinds as claimed in claim 3, it is characterised in that the cross section of the top margin frame ForShape structure or cap-shaped structure, so that noise elimination blade can be contained in the lower section of top margin frame, meanwhile, the horizontal stroke of the boundary frame area Section is triangle or chevron structure, so that noise elimination blade can be drawn in louver frame.
5. resistance sound deadening capacity adjustable ventilation blinds as claimed in claim 3, it is characterised in that the noise elimination blade hinge joint Mode is connected to the side frame of louver frame, top margin frame, on boundary frame area, thus constitute it is a kind of allow air-flow to pass through, eliminate noise Window structure.
6. resistance sound deadening capacity adjustable ventilation blinds as claimed in claim 5, it is characterised in that the noise elimination blade is using hinge Connect form to be attached with louver frame, be hinged in the middle of blade, two ends are hanging, can rotate, different angles be showed, with reality Existing different ventilation ratio.
7. resistance sound deadening capacity adjustable ventilation blinds as claimed in claim 1, it is characterised in that the sensor, includes temperature Degree, air quantity, wind pressure sensor thrin or arbitrary combination.
CN201710441499.3A 2017-06-12 2017-06-12 A kind of resistance sound deadening capacity adjustable ventilation blinds Pending CN107178293A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710441499.3A CN107178293A (en) 2017-06-12 2017-06-12 A kind of resistance sound deadening capacity adjustable ventilation blinds

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710441499.3A CN107178293A (en) 2017-06-12 2017-06-12 A kind of resistance sound deadening capacity adjustable ventilation blinds

Publications (1)

Publication Number Publication Date
CN107178293A true CN107178293A (en) 2017-09-19

Family

ID=59836659

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710441499.3A Pending CN107178293A (en) 2017-06-12 2017-06-12 A kind of resistance sound deadening capacity adjustable ventilation blinds

Country Status (1)

Country Link
CN (1) CN107178293A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112484114A (en) * 2020-11-16 2021-03-12 宁波方太厨具有限公司 Noise reduction device, range hood applying noise reduction device and control method of range hood
CN113027824A (en) * 2021-04-16 2021-06-25 曹路勇 Impeller type intelligent ventilation and noise reduction device and use method thereof
CN113279682A (en) * 2021-06-10 2021-08-20 中车资阳机车有限公司 Movable louver window with sound absorption function
CN113384125A (en) * 2021-07-08 2021-09-14 漳州美丽佳智能科技有限公司 Prevent wind type and intelligent security curtain that intensity is high

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2723653Y (en) * 2004-05-17 2005-09-07 必凯威(北京)建筑材料有限公司 Glass aluminium alloy structure louver window system
CN202325174U (en) * 2011-11-14 2012-07-11 苏文静 Novel multifunctional intelligent window
KR20130018103A (en) * 2012-04-17 2013-02-20 씨티케이 주식회사 Snow melting louver including heating cable
CN204728954U (en) * 2015-06-27 2015-10-28 深圳市尚德尔科技有限公司 A kind of noise reduction shutter
CN106401438A (en) * 2016-08-31 2017-02-15 余姚市江腾塑业有限公司 Intelligent inner window and outer window integrated control platform

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2723653Y (en) * 2004-05-17 2005-09-07 必凯威(北京)建筑材料有限公司 Glass aluminium alloy structure louver window system
CN202325174U (en) * 2011-11-14 2012-07-11 苏文静 Novel multifunctional intelligent window
KR20130018103A (en) * 2012-04-17 2013-02-20 씨티케이 주식회사 Snow melting louver including heating cable
CN204728954U (en) * 2015-06-27 2015-10-28 深圳市尚德尔科技有限公司 A kind of noise reduction shutter
CN106401438A (en) * 2016-08-31 2017-02-15 余姚市江腾塑业有限公司 Intelligent inner window and outer window integrated control platform

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112484114A (en) * 2020-11-16 2021-03-12 宁波方太厨具有限公司 Noise reduction device, range hood applying noise reduction device and control method of range hood
CN112484114B (en) * 2020-11-16 2022-02-18 宁波方太厨具有限公司 Noise reduction device, range hood applying noise reduction device and control method of range hood
CN113027824A (en) * 2021-04-16 2021-06-25 曹路勇 Impeller type intelligent ventilation and noise reduction device and use method thereof
CN113279682A (en) * 2021-06-10 2021-08-20 中车资阳机车有限公司 Movable louver window with sound absorption function
CN113384125A (en) * 2021-07-08 2021-09-14 漳州美丽佳智能科技有限公司 Prevent wind type and intelligent security curtain that intensity is high
CN113384125B (en) * 2021-07-08 2023-01-17 陈艳 Prevent wind type and intelligent security curtain that intensity is high

Similar Documents

Publication Publication Date Title
CN107178293A (en) A kind of resistance sound deadening capacity adjustable ventilation blinds
CN203274204U (en) Noise reduction structure of air conditioner indoor cabinet, air conditioner indoor cabinet and air conditioner
CN107202501A (en) Centralized cooling tower ventilation noise reduction system
CN105823140A (en) Air purifying device
CN201326358Y (en) Multifunctional mechanical ventilating sound insulation window
CN201121423Y (en) Comprehensive treatment soundproofing and denoising house
CN205713879U (en) A kind of noise elimination shutter system and louvre blade therein
CN211500420U (en) Noise-reduction ventilation convex window
CN208702788U (en) Equilateral wedge shape composite muffler
CN209229985U (en) A kind of air-conditioning noise elimination air channel structure of anechoic room
CN207230743U (en) A kind of central air-conditioning air exhausting structure of low noise
CN215446719U (en) Building heating ventilation air conditioning equipment
CN203394890U (en) Composite chimney muffler
CN206386040U (en) A kind of modified sound-deadening louver
CN203701886U (en) Micro-through-hole double-cavity silencing louvers
CN113027824B (en) Impeller type intelligent ventilation and noise reduction device and use method thereof
CN201866878U (en) Labyrinth type broadband sound insulation and elimination ventilator
CN209195237U (en) A kind of sound proof window that ventilation effect is good
CN210485969U (en) Sound insulation building ventilation device
CN209719885U (en) Conducive to the ship Ventilator device of noise reduction
CN207348738U (en) Dog-ear arc top noise elimination blinds
CN207849596U (en) A kind of outer denoising device of fan house
CN208186635U (en) Air-conditioner outdoor unit and air conditioner
CN209042608U (en) A kind of noise elimination blinds of boundless frame structure
CN209691383U (en) Polydirectional formula silencer

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20170919

RJ01 Rejection of invention patent application after publication