CN112728751A - Noise elimination equipment with gradable processing of loudness monitoring - Google Patents

Noise elimination equipment with gradable processing of loudness monitoring Download PDF

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Publication number
CN112728751A
CN112728751A CN202110060658.1A CN202110060658A CN112728751A CN 112728751 A CN112728751 A CN 112728751A CN 202110060658 A CN202110060658 A CN 202110060658A CN 112728751 A CN112728751 A CN 112728751A
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CN
China
Prior art keywords
sound absorption
fixedly connected
half shell
block
square
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
CN202110060658.1A
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Chinese (zh)
Inventor
韩庆伟
韩庆春
张向东
王玉州
马晓飞
王贺年
王玉文
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.)
Ningxia Chongli Machinery Manufacturing Co ltd
Original Assignee
Ningxia Chongli Machinery Manufacturing 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 Ningxia Chongli Machinery Manufacturing Co ltd filed Critical Ningxia Chongli Machinery Manufacturing Co ltd
Priority to CN202110060658.1A priority Critical patent/CN112728751A/en
Publication of CN112728751A publication Critical patent/CN112728751A/en
Pending legal-status Critical Current

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    • 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
    • F24F13/24Means for preventing or suppressing noise
    • F24F2013/242Sound-absorbing material

Abstract

The invention discloses a noise elimination device with loudness monitoring and grading treatment functions, which comprises a first half shell and a second half shell, wherein the inner walls of the first half shell and the second half shell are fixedly connected with fixing rods, a noise elimination barrel is fixedly connected between the two fixing rods, and the inner wall of the noise elimination barrel is fixedly connected with a first sound absorption partition plate, a second sound absorption partition plate, a noise elimination pore plate and a sponge sound absorption plate from top to bottom respectively. The sound absorption device comprises a sound absorption partition plate, a sound absorption hole plate, a sponge sound absorption plate and a sound absorption cotton ball, wherein the sound absorption hole plate is arranged on the sound absorption partition plate, the sponge sound absorption plate is arranged on the sound absorption hole plate, the sound absorption cotton ball is arranged on the sound absorption hole plate, the sound absorption hole plate is arranged on the sound absorption hole plate, the sponge sound absorption plate is arranged on the sound absorption cotton ball, the sound absorption hole plate is arranged on the sound absorption hole plate, the sound absorption hole plate is arranged on the sound absorption hole.

Description

Noise elimination equipment with gradable processing of loudness monitoring
Technical Field
The invention relates to the technical field of noise elimination equipment, in particular to noise elimination equipment with loudness monitoring and step-by-step processing.
Background
Silencing is to adopt proper measures to reduce or eliminate the noise of an air conditioning ventilation system, and noise control has two aspects, namely noise control of a heating ventilation air conditioning system service object; secondly, noise control of an equipment room of the heating, ventilation and air conditioning system is realized, the heating, ventilation and air conditioning system controls the heat and humidity environment and the air quality in the building and simultaneously has different influences on the sound environment of the building, when air flow passes through components such as a straight air pipe, an elbow, a tee joint, a reducer pipe, a valve, an air inlet and an air return port at a certain speed, the components are impacted by the air flow to be turbulent or generate deflection and vortex due to the air flow, so that the air flow regeneration noise is generated, and corresponding noise elimination equipment is required to be matched for use.
However, the existing muffling apparatus also has the following disadvantages:
1. the existing silencing equipment is difficult to monitor the loudness during use, so that the specific loudness value of the sound cannot be known, and the integral silencing effect is general, so that the sound is difficult to be better eliminated, and the equipment is low in efficiency;
2. the existing silencing equipment is integrally designed, corresponding disassembly and maintenance are difficult to carry out when a later part fails, and in addition, parts of damaged parts are difficult to replace, the material waste is caused by integral discarding, and the existing silencing equipment is not environment-friendly;
3. the existing silencing equipment lacks corresponding protection, and the protection part is difficult to be rapidly assembled and disassembled, so that the whole volume and the weight are overlarge, and the later-stage carrying and storage are inconvenient.
Disclosure of Invention
The invention aims to provide a noise elimination device with loudness monitoring and gradable processing, which aims to solve the problems that the conventional noise elimination device is difficult to monitor the loudness during use, so that the specific loudness value of sound cannot be known, the integral noise elimination effect is general, the integral noise elimination device is mainly designed in an integrated manner, corresponding disassembly and maintenance and corresponding protection are difficult to perform when a later part fails, and a protection part is difficult to perform quick assembly and disassembly.
In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides a noise elimination equipment with loudness monitoring gradable is handled, includes half first casing and half second casing, the equal fixedly connected with dead lever of the inner wall of half first casing and half second casing, two fixedly connected with noise elimination barrel between the dead lever, the inner wall of noise elimination barrel from top to bottom respectively fixedly connected with first sound baffle, second sound baffle, noise elimination orifice plate and sponge acoustic baffle, two place between the sponge acoustic baffle and inhale the sound cotton ball, the equal fixed mounting of the inner wall of half first casing and half second casing has sound detector, the equal fixed mounting of the surface of half first casing and half second casing has the display screen, the equal fixed connection of the surface of half first casing and half second casing has the installation slat, the surface of installation slat is provided with the buckle slat, spacing spout and screw hole have been seted up respectively to the surface of installation slat, the inner wall of the buckle slat is fixedly connected with a limiting slide bar block, and the surface of the buckle slat is in threaded connection with a fixing screw.
Further, the lower extreme surface of half first casing and half second casing is the first installation ring piece of fixedly connected with all, the periphery of noise elimination barrel is provided with the wire net, the upper end fixedly connected with second installation ring piece of wire net, the lower extreme fixedly connected with annular steel sheet of wire net, the first connecting block of surface fixedly connected with of second installation ring piece, the surface fixedly connected with second connecting block of first installation ring piece, square through hole has been seted up on the surface of second connecting block, the square inserted block of upper end surface fixedly connected with of first connecting block, spacing jack has been seted up on the surface of square inserted block, one side fixed surface of second connecting block is connected with fretwork piece.
Furthermore, the inside of fretwork piece is inserted and is equipped with spacing inserted bar, the fixed surface of spacing inserted bar is connected with spacing ring piece, the surface cover of spacing inserted bar is equipped with the spring, the one end fixedly connected with pulling block of spacing inserted bar, the fixed surface of annular steel sheet is connected with the installation piece.
Furthermore, one end of the spring is fixedly connected with the surface of the limiting ring piece, and the other end of the spring is fixedly connected with the inner wall of the hollow block.
Furthermore, one end of the limiting insertion rod is inserted into the inner wall of the limiting insertion hole, and the opening inner diameter of the limiting insertion hole is matched with the design outer diameter of one end of the limiting insertion rod.
Furthermore, the square insertion block is inserted into the inner wall of the square through hole, the size of the square through hole is matched with the design size of the square insertion block, and the first installation ring piece and the second installation ring piece are fixedly connected through the square through hole and the square insertion block.
Further, installation slat and buckle slat pass through screw hole and fixed screw fixed connection, the inner wall threaded connection of one end and the screw hole of fixed screw, and the threaded hole set up the mutual adaptation of outer diameter of inner diameter and fixed screw tip design.
Furthermore, the limiting sliding strip block is connected with the inner wall of the limiting sliding groove in a sliding mode, and the size of the limiting sliding groove is matched with the design size of the limiting sliding strip block.
Compared with the prior art, the invention has the following beneficial effects:
(1) the sound absorption device comprises a sound absorption partition plate, a sound absorption hole plate, a sponge sound absorption plate and a sound absorption cotton ball, wherein the sound absorption hole plate is arranged on the sound absorption partition plate, the sponge sound absorption plate is arranged on the sound absorption hole plate, the sound absorption cotton ball is arranged on the sound absorption hole plate, the sound absorption hole plate is arranged on the sound absorption hole plate, the sponge sound absorption plate is arranged on the sound absorption cotton ball, the sound absorption hole plate is arranged on the sound absorption hole plate, the sound absorption hole plate is arranged on the sound absorption hole.
(2) According to the invention, the first half shell and the second half shell can be detached more quickly by installing the lath, the buckle lath, the limiting sliding chute and the limiting sliding strip block, so that later-stage maintenance and replacement are facilitated, steps required for detaching are avoided, and loss caused by excessive detaching of parts is avoided.
(3) According to the invention, equipment is protected correspondingly through the steel wire mesh, and the steel wire mesh can be connected with the equipment more quickly through the first connecting block, the second connecting block, the square inserting block and the square through hole, so that the equipment can be disassembled and assembled more quickly, the later-stage disassembly is convenient, and the difficulty in carrying and storing caused by the overweight weight or overlarge volume of the whole equipment is avoided.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a schematic structural view of the present invention;
FIG. 4 is a schematic structural view of the present invention;
FIG. 5 is a schematic structural view of the present invention;
fig. 6 is a schematic structural diagram of the present invention.
In the figure: 1. a first housing half; 2. a second half-shell; 3. fixing the rod; 4. a silencing cylinder; 5. a first sound absorbing barrier; 6. a second sound-absorbing partition plate; 7. a silencing orifice plate; 8. a sponge sound absorbing panel; 9. a sound absorbing cotton ball; 10. a sound detector; 11. a display screen; 12. installing a batten; 13. buckling the batten; 14. a limiting chute; 15. a threaded hole; 16. a limiting sliding strip block; 17. fixing screws; 18. a first mounting ring segment; 19. a second mounting ring segment; 20. steel wire mesh; 21. an annular steel sheet; 22. a first connection block; 23. a second connecting block; 24. a square through hole; 25. a square insert block; 26. limiting the jacks; 27. hollowing out the block; 28. a limiting inserted rod; 29. a limit ring sheet; 30. a spring; 31. pulling the block; 32. and (7) installing the block.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-6, the present invention provides the following technical solutions: a noise elimination device with loudness monitoring and grading treatment comprises a first half shell 1 and a second half shell 2, wherein fixing rods 3 are fixedly connected to the inner walls of the first half shell 1 and the second half shell 2, a noise elimination cylinder 4 is fixedly connected between the two fixing rods 3, a first sound absorption partition plate 5, a second sound absorption partition plate 6, a noise elimination pore plate 7 and a sponge sound absorption plate 8 are respectively and fixedly connected to the inner wall of the noise elimination cylinder 4 from top to bottom, sound absorption cotton balls 9 are placed between the two sponge sound absorption plates 8, sound detectors 10 are fixedly installed on the inner walls of the first half shell 1 and the second half shell 2, display screens 11 are fixedly installed on the outer surfaces of the first half shell 1 and the second half shell 2, installation strip plates 12 are fixedly connected to the outer surfaces of the first half shell 1 and the second half shell 2, buckles 13 are arranged on the outer surfaces of the installation strip plates 12, and limiting chutes 14 and threaded holes 15 are respectively formed in the surfaces of the, the inner wall of the buckle slat 13 is fixedly connected with a limiting slide block 16, and the surface of the buckle slat 13 is in threaded connection with a fixing screw 17.
Through the arrangement of the sound detector 10 and the display screen 11, the equipment can better monitor sound, and then the sound can be better processed in three steps after entering the equipment by a method of hierarchical processing, so that the equipment achieves a better noise elimination processing effect, and the use efficiency of the equipment is improved.
Specifically, first installation ring piece 18 of the equal fixedly connected with in lower extreme surface of half casing 1 of first casing 1 and half casing 2 of second, the periphery of noise elimination barrel 4 is provided with wire net 20, wire net 20's upper end fixedly connected with second installation ring piece 19, wire net 20's lower extreme fixedly connected with annular steel sheet 21, the first connecting block 22 of the outer fixed surface of second installation ring piece 19 is connected with, the outer fixed surface of first installation ring piece 18 is connected with second connecting block 23, square through hole 24 has been seted up on the surface of second connecting block 23, the upper end fixed surface of first connecting block 22 is connected with square inserted block 25, spacing jack 26 has been seted up on the surface of square inserted block 25, one side fixed surface of second connecting block 23 is connected with fretwork piece 27.
Through setting up corresponding wire net 20 for equipment when using, can be better protect noise elimination barrel 4, avoid noise elimination barrel 4 to receive the damage that the foreign object striking caused, thereby let the use of equipment safer.
Specifically, a limiting insertion rod 28 is inserted into the hollow block 27, a limiting ring piece 29 is fixedly connected to the outer surface of the limiting insertion rod 28, a spring 30 is sleeved on the outer surface of the limiting insertion rod 28, a pulling block 31 is fixedly connected to one end of the limiting insertion rod 28, and an installation block 32 is fixedly connected to the outer surface of the annular steel sheet 21.
Through setting up spacing ring piece 29 and spring 30 for loosen the an instant that pulls piece 31, spring 30's bounce-back can promote spacing ring piece 29, and spacing ring piece 29 and spacing inserted bar 28 fixed connection, thereby let spacing ring piece 29 drive spacing inserted bar 28 and produce the removal, let the automatic re-setting that the one end of spacing inserted bar 28 can be better, thereby insert the inner wall of spacing jack 26, reach corresponding fixed effect.
Specifically, one end of the spring 30 is fixedly connected with the surface of the limit ring sheet 29, and the other end of the spring 30 is fixedly connected with the inner wall of the hollow block 27.
Through the both ends with spring 30 respectively with the surperficial of spacing ring piece 29 and the inner wall fixed connection of fretwork piece 27 for spring 30 provides the buffer capacity in later stage when possessing the connectivity.
Specifically, one end of the limit inserting rod 28 is inserted into the inner wall of the limit inserting hole 26, and the opened inner diameter of the limit inserting hole 26 is matched with the designed outer diameter of one end of the limit inserting rod 28.
Through the design of seting up the internal diameter with spacing jack 26 and spacing inserted bar 28 one end external diameter looks adaptation for can be more stable after the inner wall of establishing into spacing jack 26 is inserted to the one end of spacing inserted bar 28.
Specifically, the square insertion block 25 is inserted into the inner wall of the square through hole 24, the opening size of the square through hole 24 is matched with the design size of the square insertion block 25, and the first installation ring piece 18 and the second installation ring piece 19 are fixedly connected with the square insertion block 25 through the square through hole 24.
Through the size design of seting up square through-hole 24 and the big or small looks adaptation of square inserted block 25 for square inserted block 25 is more suitable after inserting and establishing the inner wall of square through-hole 24.
Specifically, the mounting strip plate 12 and the buckle strip plate 13 are fixedly connected through the threaded hole 15 and the fixing screw 17, one end of the fixing screw 17 is in threaded connection with the inner wall of the threaded hole 15, and the opened inner diameter of the threaded hole 15 is matched with the designed outer diameter of the end part of the fixing screw 17.
Through the design of seting up the internal diameter with screw hole 15 and fixed screw 17 tip external diameter looks adaptation for the one end of fixed screw 17 is connected more stably with the inner wall of screw hole 15.
Specifically, the limiting sliding bar block 16 is connected to the inner wall of the limiting sliding groove 14 in a sliding manner, and the opening size of the limiting sliding groove 14 is matched with the design size of the limiting sliding bar block 16.
The size of the limiting sliding chute 14 is matched with the size of the limiting sliding strip block 16, so that the limiting sliding strip block 16 can better slide on the inner wall of the limiting sliding chute 14.
The working principle of the invention is as follows: when the whole noise elimination equipment with loudness monitoring and gradable processing is used, firstly, the sound passing through the equipment can be monitored through the sound detector 10 and the display screen 11, so that the noise pollution degree can be better known, the sound entering the equipment is firstly guided and transmitted through the first sound absorption partition plate 5 and the second sound absorption partition plate 6, the first sound absorption partition plate 5 and the second sound absorption partition plate 6 are in a staggered design, the circulation path of the sound is enlarged, the first sound absorption partition plate 5 and the second sound absorption partition plate 6 can carry out better noise elimination processing, the sound after the first step of processing can be circulated again, then, the second step of noise elimination processing is carried out through the noise elimination pore plate 7, and finally, the sound is transmitted to the sponge sound absorption plate 8, and then, the third part of noise elimination processing is carried out under the matching of the sponge sound absorption plate 8 and the sound absorption cotton ball 9, so that the better gradable processing is achieved, let equipment can carry out better amortization processing work, moreover be exactly equipment when needs split, at first the wrench movement fixed screw 17, make the one end of fixed screw 17 break away from screw hole 15, thereby it is no longer limited to let buckle slat 13, afterwards alright carry out the roll-off with buckle slat 13 through spacing spout 14 and spacing slide bar piece 16, let two installation slats 12 no longer at first limit, thereby let first half casing 1 and the half casing 2 of second carry out quick separation, reach final purpose of separating, it needs corresponding protection to be exactly equipment in addition, thereby assemble wire net 20, concrete step is as follows: firstly carry out the lock through first installation ring piece 18 and second installation ring piece 19 with wire net 20, before this, need through pulling the spacing inserted bar 28 of 31 pulling of piece, then give way shape inserted block 25 and pass square through hole 24, after square inserted block 25 passed square through hole 24, loosen and pull piece 31 for spacing inserted bar 28 produces the resilience under the cooperation of spacing ring piece 29 and spring 30, thereby let the inside of spacing jack 26 is inserted to the one end of spacing inserted bar 28, reach final fixed effect.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. A muffling apparatus with gradable processing of loudness monitoring, characterized by: the sound absorption device comprises a first half shell (1) and a second half shell (2), wherein the inner walls of the first half shell (1) and the second half shell (2) are fixedly connected with fixing rods (3) and a sound absorption barrel (4) between the two fixing rods (3), the inner wall of the sound absorption barrel (4) is fixedly connected with a first sound absorption partition plate (5), a second sound absorption partition plate (6), a sound absorption pore plate (7) and a sponge sound absorption plate (8) from top to bottom respectively, a sound absorption cotton ball (9) is placed between the sponge sound absorption plates (8), sound detectors (10) are fixedly mounted on the inner walls of the first half shell (1) and the second half shell (2), display screens (11) are fixedly mounted on the outer surfaces of the first half shell (1) and the second half shell (2), and mounting strips (12) are fixedly connected with the outer surfaces of the first half shell (1) and the second half shell (2), the surface of installation slat (12) is provided with buckle slat (13), spacing spout (14) and screw hole (15) have been seted up respectively to the surface of installation slat (12), the spacing draw runner piece of inner wall fixedly connected with (16) of buckle slat (13), the surperficial threaded connection of buckle slat (13) has set screw (17).
2. The muffling apparatus with gradable loudness monitoring process of claim 1, wherein: the lower end surfaces of the first half shell (1) and the second half shell (2) are fixedly connected with a first mounting ring piece (18), a steel wire mesh (20) is arranged on the periphery of the silencing barrel body (4), the upper end of the steel wire mesh (20) is fixedly connected with a second mounting ring piece (19), the lower end of the steel wire mesh (20) is fixedly connected with an annular steel sheet (21), the outer surface of the second mounting annular sheet (19) is fixedly connected with a first connecting block (22), the outer surface of the first mounting ring piece (18) is fixedly connected with a second connecting block (23), the surface of the second connecting block (23) is provided with a square through hole (24), the upper end surface of the first connecting block (22) is fixedly connected with a square inserting block (25), the surface of the square insertion block (25) is provided with a limiting insertion hole (26), and the surface of one side of the second connection block (23) is fixedly connected with a hollow block (27).
3. The muffling apparatus with gradable loudness monitoring process of claim 2, wherein: the utility model discloses a spacing inserted bar, including fretwork piece (27), the inside of fretwork piece (27) is inserted and is equipped with spacing inserted bar (28), the fixed surface of spacing inserted bar (28) is connected with spacing ring piece (29), the surface cover of spacing inserted bar (28) is equipped with spring (30), the one end fixedly connected with of spacing inserted bar (28) pulls piece (31), the fixed surface of annular steel sheet (21) is connected with installation piece (32).
4. The muffling apparatus with gradable loudness monitoring process of claim 3, wherein: one end of the spring (30) is fixedly connected with the surface of the limit ring piece (29), and the other end of the spring (30) is fixedly connected with the inner wall of the hollow block (27).
5. The muffling apparatus with gradable loudness monitoring process of claim 3, wherein: one end of the limiting insertion rod (28) is inserted into the inner wall of the limiting insertion hole (26), and the opening inner diameter of the limiting insertion hole (26) is matched with the design outer diameter of one end of the limiting insertion rod (28).
6. The muffling apparatus with gradable loudness monitoring process of claim 2, wherein: the square insertion block (25) is inserted into the inner wall of the square through hole (24), the opening size of the square through hole (24) is matched with the design size of the square insertion block (25), and the first installation ring piece (18) and the second installation ring piece (19) are fixedly connected with the square insertion block (25) through the square through hole (24).
7. The muffling apparatus with gradable loudness monitoring process of claim 1, wherein: installation slat (12) and buckle slat (13) are through screw hole (15) and fixed screw (17) fixed connection, the inner wall threaded connection of the one end of fixed screw (17) and screw hole (15), and the outer diameter mutual adaptation of seting up inner diameter and fixed screw (17) tip design of screw hole (15).
8. The muffling apparatus with gradable loudness monitoring process of claim 1, wherein: the limiting sliding strip block (16) is connected with the inner wall of the limiting sliding groove (14) in a sliding mode, and the opening size of the limiting sliding groove (14) is matched with the design size of the limiting sliding strip block (16).
CN202110060658.1A 2021-01-18 2021-01-18 Noise elimination equipment with gradable processing of loudness monitoring Pending CN112728751A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110060658.1A CN112728751A (en) 2021-01-18 2021-01-18 Noise elimination equipment with gradable processing of loudness monitoring

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110060658.1A CN112728751A (en) 2021-01-18 2021-01-18 Noise elimination equipment with gradable processing of loudness monitoring

Publications (1)

Publication Number Publication Date
CN112728751A true CN112728751A (en) 2021-04-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110060658.1A Pending CN112728751A (en) 2021-01-18 2021-01-18 Noise elimination equipment with gradable processing of loudness monitoring

Country Status (1)

Country Link
CN (1) CN112728751A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113432291A (en) * 2021-05-27 2021-09-24 刘鹏 Gas water heater

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113432291A (en) * 2021-05-27 2021-09-24 刘鹏 Gas water heater

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