CN114658158A - Sound insulation structure of ceiling air conditioning unit and construction method - Google Patents

Sound insulation structure of ceiling air conditioning unit and construction method Download PDF

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Publication number
CN114658158A
CN114658158A CN202210328315.3A CN202210328315A CN114658158A CN 114658158 A CN114658158 A CN 114658158A CN 202210328315 A CN202210328315 A CN 202210328315A CN 114658158 A CN114658158 A CN 114658158A
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CN
China
Prior art keywords
sound insulation
sound
blanket
flexible
support frame
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CN202210328315.3A
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Chinese (zh)
Inventor
任波宇
刘孝晨
郑雨
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Henan Yuanhang Sound Insulation Material Technology Co ltd
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Henan Yuanhang Sound Insulation Material Technology Co ltd
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Priority to CN202210328315.3A priority Critical patent/CN114658158A/en
Publication of CN114658158A publication Critical patent/CN114658158A/en
Pending legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B9/00—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B9/00—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
    • E04B9/001—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation characterised by provisions for heat or sound insulation
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B9/00—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
    • E04B9/06—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation characterised by constructional features of the supporting construction, e.g. cross section or material of framework members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/24—Means for preventing or suppressing noise
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/24—Means for preventing or suppressing noise
    • F24F2013/242—Sound-absorbing material

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Building Environments (AREA)

Abstract

The invention discloses a sound insulation structure of a suspended ceiling air conditioning unit and a construction method, belongs to the technical field of sound insulation, and solves the technical problem of sound insulation treatment of the suspended ceiling air conditioning unit; sealing the air duct by using a composite sound-proof felt; thirdly, laying an inner layer flexible sound insulation blanket; step four, sealing the air duct by using a composite sound-proof felt, and step five, paving an outer-layer flexible sound-proof blanket; and step six, testing noise. The construction method can ensure that the structure of the support frame is firmly supported, the sealing of the sound-proof felt at the air duct is tight, and the wrapped flexible sound-proof blanket is firm; the sound insulation structure is convenient and fast to construct and good in sound insulation effect.

Description

Sound insulation structure of ceiling air conditioning unit and construction method
Technical Field
The invention belongs to the technical field of sound insulation, and relates to a sound insulation structure of a ceiling air conditioning unit and a construction method.
Background
The air duct and the unit of the air conditioning system are hung on the roof when being decorated, so that the air conditioning unit equipment generating noise is subjected to sound insulation, construction on an inherent structure needs to be considered, and the construction difficulty is increased.
Carry out syllable-dividing to air conditioning technology and handle, need design sound-insulating structure, in order to guarantee that the effect that gives sound insulation is optimum, the degree of difficulty of reunion construction, then need design out convenient quick construction mode to and the structure of easy installation.
The main factors influencing the sound absorption performance of the soundproof cotton are thickness, density, air flow resistance and the like; density is the weight per cubic meter of material; the air flow resistance is the ratio of air pressure and air flow rate at two sides of the material in unit thickness; the air flow resistance is the most important factor affecting the sound-insulating performance of the soundproof cotton. The flow resistance is too small, which indicates that the material is sparse, air vibration easily passes through, and the sound insulation performance is reduced; too large flow resistance means that the material is dense, air vibration is difficult to transmit, and the sound insulation performance is also reduced. For soundproof cotton, there is an optimum flow resistance for the soundproof property. In practical engineering, it is difficult to measure the air flow resistance, but it can be roughly estimated and controlled by thickness and volume weight, so air is needed.
1. As the thickness increases, the middle and low frequency sound damping coefficient increases significantly, but the high frequency variation is not large (high frequency absorption is always large).
2. The thickness is unchanged, the volume weight is increased, and the sound insulation coefficient of medium and low frequency is also increased; however, when the volume weight is increased to a certain degree, the material becomes dense, the flow resistance is greater than the optimum flow resistance, and the sound insulation coefficient is decreased.
The volume weight of the steel plate is 16Kg/m for the thickness of more than 5cm3The soundproof cotton has a low-frequency 125Hz sound insulation coefficient of about 0.2, and medium-high frequency (C and F)>500Hz) has been close to 1. When the thickness is increased from 5cm, the sound insulation coefficient of low frequency is gradually increased, and when the thickness is more than 1m, the sound absorption coefficient of low frequency 125Hz is close to 1.
When the thickness is unchanged and the volume weight is increased, the low-frequency sound insulation coefficient of the soundproof cotton is also continuously improved, and when the volume weight is close to 110kg/m3The time sound insulation performance reaches the maximum value, the thickness of the sound insulation board is 50mm, and the frequency of the sound insulation board at 125Hz is close to 0.6-0.7. The volume weight exceeds 120kg/m3When the weight exceeds 300kg/m, the sound insulation performance is rather deteriorated because the material becomes dense, and the middle-high frequency sound insulation performance is greatly affected3When this occurs, the sound insulation performance is much reduced. The thickness of the sound-absorbing cotton commonly used in building acoustics is 2.5cm and 5cm, and the volume weight is 16, 24, 32, 48, 80, 96 and 112kg/m3. A thickness of 5cm, 28-38kg/m, is generally used3The soundproof cotton of (1).
Disclosure of Invention
The invention aims to design a convenient and fast construction mode and an easy-to-install structure for a suspended ceiling air conditioning unit.
The technical scheme adopted by the invention is as follows:
the utility model provides a furred ceiling air conditioning unit sound-proof structure, includes and hangs the support frame of being connected with the furred ceiling, and support frame parcel formula sets up in air conditioning unit periphery, two-layer flexible sound-proof blanket on the support frame to and the compound deadening felt that sets up around air conditioning unit wind channel mouth.
Specifically, the support frame is a three-dimensional square steel structure, the front end face and the rear end face of the support frame are identical in face structure, and the middle part of the support frame is provided with a midline structure.
Specifically, the face structure is formed by welding two vertical steel pipes parallel to each other in a square frame structure of the end face, and welding two horizontal steel pipes arranged in parallel between the two vertical steel pipes.
Specifically, the midline structures are arranged around the circumference of the support frame, and the midline structures are located in the lateral plane.
Specifically, the flexible sound-proof blanket is of a three-layer composite structure coated by fireproof cloth, and the three-layer composite structure is formed by clamping a layer of sound-absorbing cotton by two layers of flexible sound-proof felts.
Preferably, the composite deadening felt is a four-layer composite deadening felt sealing structure.
A construction method of a sound insulation structure of a suspended ceiling air conditioning unit is used for forming the structure, and comprises the following steps:
step one, building a support frame
The top surface square frame structure of the support frame is formed through four galvanized square tubes, then the bottom surface square frame structure identical to the top surface square frame structure is formed through the four galvanized square tubes, the top surface square frame structure and the bottom surface square frame structure are connected at corresponding positions through six galvanized square tubes to form a three-dimensional square steel structure body, and the face structures of the front end surface and the rear end surface of the three-dimensional square steel structure body are perfected;
sealing the air duct with a composite sound-proof felt
The inner sides of the face structures of the front end face and the rear end face are respectively connected with sound-proof felts, and the sound-proof felts are connected around the air duct in a sealing manner;
thirdly, laying an inner layer flexible sound insulation blanket
Connecting flexible sound insulation blankets with proper shapes on the inner wall of the three-dimensional square steel structure body of the support frame, and tightly plugging and deforming the edges of the first flexible sound insulation blanket, the second flexible sound insulation blanket, the fourth flexible sound insulation blanket and the third flexible sound insulation blanket which are in mutual contact, so that no gap exists among the flexible sound insulation blankets;
fourthly, sealing the air duct by using a composite sound-proof felt
The outer sides of the face structures of the front end face and the rear end face are respectively connected with sound insulation felts, and the sound insulation felts are connected around the air duct in a sealing manner;
step five, paving an outer-layer flexible sound-insulation blanket
Connecting a flexible sound-insulating blanket with a proper shape on the inner wall of the three-dimensional square steel structure body of the support frame;
step six, testing noise
Around whole sound-proof structure, test with the decibel appearance at seam crossing for the noise reduces to 40 ~ 60 decibels, if noise reduction effect is not good, adjusts flexible sound-proof blanket layer level thickness or material unit weight, demolishs flexible sound-proof blanket and lays again.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the sound insulation structure can well wrap a noise source, namely an air conditioning unit structure, so that the noise is prevented from being transmitted, and a good sound insulation effect is achieved; the steel frame structure is additionally provided with the inner and outer layers of flexible sound insulation blankets, the sound insulation effect is better than that of a single-layer sound insulation structure, the inner layers of flexible sound insulation blankets are mutually extruded to seal gaps, and the sound insulation effect is further enhanced; and the sound-proof felt is adopted to seal the air channel, so that air flow and sound waves at the gap are prevented from being transmitted by air.
2. The face structure of the end face of the sound insulation structure can better meet the sealing treatment requirement of the sound insulation felt, and the sound insulation felt is well supported, so that the air duct structure of the air conditioning unit is prevented from rigidly colliding with a support frame or generating a gap in the vibration process when vibrating, and the sound insulation effect is further enhanced.
3. The midline structures of the present invention provide good support and reinforcement for large areas of flexible acoustical blankets, such as the first and second flexible acoustical blankets, which are precariously collapse resistant, resulting in imprecise wrapping.
4. The construction method can ensure that the structure of the support frame is firmly supported, the sealing of the sound-proof felt at the air duct is tight, and the wrapped flexible sound-proof blanket is firm; the detection mode of the last step can ensure the final construction effect, so that the decibel is reduced to the noise decibel level.
Drawings
FIG. 1 is a schematic diagram of the relationship of support frames in a ceiling, an air conditioning unit and a sound insulation structure according to the present invention;
FIG. 2 is a schematic view of the support frame of the sound insulation structure of the present invention;
FIG. 3 is a schematic top view of the view A-A in FIG. 2;
FIG. 4 is a schematic view of a support frame of the sound insulation structure of the present invention;
FIG. 5 is a schematic cross-sectional view of a support frame + flexible acoustical blanket of the acoustical structure of the present invention;
FIG. 6 is a schematic view of a support frame + flexible acoustical blanket + composite acoustical blanket of the acoustical structure of the present invention;
FIG. 7 is a schematic view of a first flexible acoustical blanket of the present invention;
FIG. 8 is a schematic view of a second flexible acoustical blanket of the present invention;
FIG. 9 is a schematic view of a third flexible acoustical blanket of the present invention;
FIG. 10 is a schematic view of a fourth flexible acoustical blanket of the present invention;
FIG. 11 is a schematic view of the internal construction of the flexible acoustical blanket of the present invention;
the labels in the figure are: 1-suspended ceiling, 2-air conditioning unit, 3-support frame, 30-three-dimensional square steel structure body, 31-face structure, 311-vertical steel pipe, 312-horizontal steel pipe, 32-center line structure, 4-hanging steel wire, 5-hanging steel bar, 6-outer layer flexible sound-insulating blanket, 61-first flexible sound-insulating blanket 61, 62-second flexible sound-insulating blanket, 63-third flexible sound-insulating blanket, 64-fourth flexible sound-insulating blanket, 7-inner layer flexible sound-insulating blanket, 8-composite sound-insulating blanket, 9-fireproof cloth, 10-sound-insulating blanket and 11-sound-absorbing cotton.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
The invention provides a sound insulation structure of a suspended ceiling air conditioning unit, which comprises a support frame 3 connected with a suspended ceiling 1 in a hanging manner, wherein the support frame 3 is arranged at the periphery of the air conditioning unit 2 in a wrapping manner, two layers of flexible sound insulation blankets are arranged on the support frame 3, and a composite sound insulation felt 8 is arranged around the air duct opening of the air conditioning unit 2.
The support frame 3 is a three-dimensional square steel structure 30, the front end surface and the rear end surface of which have the same face structure 31, and the middle part of which has a midline structure 32.
The face structure 31 is formed by welding two parallel vertical steel pipes 311 in a square frame structure of the end face, and welding two parallel horizontal steel pipes 312 between the two vertical steel pipes.
The midline structures 32 are disposed around the circumference of the brace, with the midline structures 32 lying in a lateral plane.
The flexible sound-proof blanket is a three-layer composite structure coated by fireproof cloth 9, and the three-layer composite structure is formed by clamping a layer of sound-absorbing cotton 11 by two layers of sound-proof felts 10.
The composite deadening felt 8 is a four-layer composite deadening felt sealing structure.
The invention discloses a construction method of a sound insulation structure of a ceiling air conditioning unit, which is used for forming the sound insulation structure and comprises the following steps:
step one, building a support frame
The four galvanized square tubes form a top surface square frame structure of the supporting frame, one galvanized square tube is additionally arranged on the central line of the supporting frame, and then four corners of the top surface square frame structure are connected through hanging steel bars and hung above the air conditioning unit.
Then, forming a bottom surface square frame structure which is the same as the top surface square frame structure through four galvanized square tubes, and adding a galvanized square tube at the central line position of the bottom surface square frame structure; the four corners and the two ends of the central line of the six galvanized square tubes corresponding to the bottom surface square frame structure are welded, then the corresponding positions of the top surface square frame structure are upwards welded by lifting the bottom surface square frame structure to form a three-dimensional square steel structure body 30 of the support frame 3, the three-dimensional square steel structure body 30 frames the air conditioning unit 2 therein, and the air duct of the air conditioning unit 2 is led out from the front end surface and the rear end surface of the air conditioning unit.
The face structure 31 of the front end face and the rear end face of the three-dimensional square steel structure body is completed, two parallel vertical steel pipes 311 are welded in the front end face, the vertical steel pipes 311 are located on two sides of the air duct, then two parallel transverse steel pipes 312 are welded between the two vertical steel pipes 311, the transverse steel pipes 312 are located on two sides of the air duct, two parallel vertical steel pipes 311 are arranged on the rear end face corresponding to the face structure of the front end face, and two parallel transverse steel pipes 312 are welded between the two vertical steel pipes 311.
Sealing the air duct with a composite sound-proof felt
The sound insulation felt is connected to the inner side of the face structure of the front end face, is connected around the air channel in a sealing mode and is supported through the vertical steel pipes 311 and the transverse steel pipes 312 which are arranged in a crossed mode, the sound insulation felt is connected to the inner side of the face structure of the rear end face in the same mode, is connected around the air channel in a sealing mode and is supported through the vertical steel pipes 311 and the transverse steel pipes 312 which are arranged in a crossed mode.
Two layers of deadening felt are preferably used for the sealing joint.
Thirdly, laying an inner layer flexible sound-proof blanket 7
Connecting flexible sound insulation blankets with proper shapes on the inner wall of a three-dimensional square steel structure body of the support frame, wherein the top surface and the bottom surface of the support frame are connected with a first flexible sound insulation blanket 61, the two side surfaces of the support frame are respectively connected with a second flexible sound insulation blanket 62, the front end surface and the rear end surface of the support frame have the same structure, namely, two fourth flexible sound insulation blankets 64 and two third flexible sound insulation blankets 63 are connected in the end surfaces, the strip-shaped fourth flexible sound insulation blankets 64 are respectively arranged along the upper edge and the lower edge of the end surfaces, and the short square third flexible sound insulation blankets 63 are respectively connected between the fourth flexible sound insulation blankets 64 along the two side edges;
the edges of the first, second, fourth and third flexible soundproof blankets 61, 62, 64 and 63, which are in contact with each other, are subjected to caulking deformation treatment so that there is no gap between the flexible soundproof blankets.
Fourthly, sealing the air duct by using a composite sound-proof felt
The outside of the face structure of the front end face is connected with the sound-proof felt, the sound-proof felt is connected around the air channel in a sealing mode and is supported through the vertical steel pipe 311 and the transverse steel pipe 312 which are arranged in a crossed mode, the outside of the face structure of the rear end face is connected with the sound-proof felt in a sealing mode, the sound-proof felt is connected around the air channel in a sealing mode and is supported through the vertical steel pipe 311 and the transverse steel pipe 312 which are arranged in a crossed mode.
Two layers of deadening felt are preferably used for the sealing joint.
Step five, paving an outer-layer flexible sound-insulating blanket 6
Connecting flexible sound insulation blankets with proper shapes on the inner wall of a three-dimensional square steel structure body of the support frame, wherein the top surface and the bottom surface of the support frame are connected with a first flexible sound insulation blanket 61, the two side surfaces of the support frame are respectively connected with a second flexible sound insulation blanket 62, the front end surface and the rear end surface of the support frame have the same structure, namely, two fourth flexible sound insulation blankets 64 and two third flexible sound insulation blankets 63 are connected in the end surfaces, the strip-shaped fourth flexible sound insulation blankets 64 are respectively arranged along the upper edge and the lower edge of the end surfaces, and the short square third flexible sound insulation blankets 63 are respectively connected between the fourth flexible sound insulation blankets 64 along the two side edges;
the first flexible soundproof blanket 61 and the second flexible soundproof blanket 62 have a large area and are used for directly covering the whole side wall, and the fourth flexible soundproof blanket 64 and the third flexible soundproof blanket 63 have a small area and are used for splicing and covering the end faces.
And the first flexible soundproof blanket 61, the second flexible soundproof blanket 62, the fourth flexible soundproof blanket 64 and the third flexible soundproof blanket 63 used for forming the inner layer flexible soundproof blanket 7 have the same structure as the first flexible soundproof blanket 61, the second flexible soundproof blanket 62, the fourth flexible soundproof blanket 64 and the third flexible soundproof blanket 63 used for forming the outer layer flexible soundproof blanket 6, so that the inner layer flexible soundproof blankets 7 are inevitably pressed against each other, gaps are eliminated, and soundproof effect is enhanced.
Step six, testing noise
Around whole sound-proof structure, test with the decibel appearance in seam crossing for the noise reduces to 40 ~ 60 decibels, if noise reduction effect is not good, adjusts flexible sound insulation blanket layer level thickness or material unit weight, lays after demolising flexible sound insulation blanket again.

Claims (7)

1. The utility model provides a furred ceiling air conditioning unit sound-proof structure, its characterized in that includes and hangs the support frame of being connected with the furred ceiling, and support frame parcel formula sets up in air conditioning unit periphery, two-layer flexible sound-proof blanket on the support frame to and the compound deadening felt that sets up around air conditioning unit wind channel mouth.
2. The sound insulation structure of the suspended ceiling air conditioning unit as claimed in claim 1, wherein the support frame is a three-dimensional square steel structure, the front end surface and the rear end surface of the support frame have the same face structure, and the middle part of the support frame has a center line structure.
3. The sound insulation structure for the ceiling air conditioning unit according to claim 2, wherein the face structure is formed by welding two vertical steel pipes parallel to each other in a square frame structure of the end face, and welding two horizontal steel pipes parallel to each other between the two vertical steel pipes.
4. A suspended ceiling air conditioning unit acoustic isolation structure as set forth in claim 3 wherein said centerline structure is disposed about a perimeter of said support frame, said centerline structure lying in a side plane.
5. The sound insulation structure of a suspended ceiling air conditioning unit as claimed in claim 1, wherein the flexible sound insulation blanket is a three-layer composite structure covered by fire-proof cloth, and the three-layer composite structure is formed by two layers of flexible sound insulation felt sandwiching a layer of sound absorption cotton.
6. The sound insulation structure of the ceiling air conditioning unit according to claim 1, wherein the composite deadening felt is a four-layer composite deadening felt sealing structure.
7. A construction method of a sound insulation structure of a ceiling air conditioning unit is characterized by comprising the following steps:
step one, a support frame is built,
forming a top surface square frame structure of the support frame through four galvanized square tubes, then forming a bottom surface square frame structure identical to the top surface square frame structure through the four galvanized square tubes, connecting the top surface square frame structure and the bottom surface square frame structure at corresponding positions through six galvanized square tubes to form a three-dimensional square steel structure body, and perfecting the face structures of the front end surface and the rear end surface of the three-dimensional square steel structure body;
step two, the air channel is sealed by a composite sound-proof felt,
the inner sides of the face structures of the front end face and the rear end face are respectively connected with sound insulation felts, and the sound insulation felts are connected around the air duct in a sealing manner;
thirdly, laying an inner layer flexible sound-insulating blanket,
connecting flexible sound insulation blankets with proper shapes on the inner wall of the three-dimensional square steel structure body of the support frame, and tightly plugging and deforming the edges of the first flexible sound insulation blanket, the second flexible sound insulation blanket, the fourth flexible sound insulation blanket and the third flexible sound insulation blanket which are in mutual contact, so that no gap exists among the flexible sound insulation blankets;
step four, sealing the air channel with a composite sound-proof felt,
the outer sides of the face structures of the front end face and the rear end face are respectively connected with sound insulation felts, and the sound insulation felts are connected around the air duct in a sealing manner;
step five, laying an outer layer flexible sound-insulating blanket,
connecting a flexible sound-insulating blanket with a proper shape on the inner wall of the three-dimensional square steel structure body of the support frame;
step six, testing the noise of the mobile phone,
around whole sound-proof structure, test with the decibel appearance at seam crossing for the noise reduces to 40 ~ 60 decibels, if the noise reduction effect is not good, adjusts flexible sound insulation blanket layer level thickness or material unit weight, demolishs flexible sound insulation blanket and lays again.
CN202210328315.3A 2022-03-30 2022-03-30 Sound insulation structure of ceiling air conditioning unit and construction method Pending CN114658158A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210328315.3A CN114658158A (en) 2022-03-30 2022-03-30 Sound insulation structure of ceiling air conditioning unit and construction method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210328315.3A CN114658158A (en) 2022-03-30 2022-03-30 Sound insulation structure of ceiling air conditioning unit and construction method

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Publication Number Publication Date
CN114658158A true CN114658158A (en) 2022-06-24

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002089887A (en) * 2000-07-11 2002-03-27 Nippon Tokushu Toryo Co Ltd Soundproof material for outdoor unit of air conditioner
US20100014282A1 (en) * 2008-07-15 2010-01-21 Michael Danesh Fire-resistant and noise attenuating recessed lighting assembly
CN105736478A (en) * 2016-03-30 2016-07-06 王刚 Sound insulation and noise reduction device of draught fan
CN207048095U (en) * 2017-05-05 2018-02-27 重庆高世环保工程有限公司 A kind of sound arrester for building
CN209909339U (en) * 2019-02-20 2020-01-07 刘寿乐 Rectangular heat-preservation ventilation hose

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002089887A (en) * 2000-07-11 2002-03-27 Nippon Tokushu Toryo Co Ltd Soundproof material for outdoor unit of air conditioner
US20100014282A1 (en) * 2008-07-15 2010-01-21 Michael Danesh Fire-resistant and noise attenuating recessed lighting assembly
CN105736478A (en) * 2016-03-30 2016-07-06 王刚 Sound insulation and noise reduction device of draught fan
CN207048095U (en) * 2017-05-05 2018-02-27 重庆高世环保工程有限公司 A kind of sound arrester for building
CN209909339U (en) * 2019-02-20 2020-01-07 刘寿乐 Rectangular heat-preservation ventilation hose

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