CN107762802B - Oxygen generator sound absorption and noise reduction device and method and applied oxygen generator - Google Patents
Oxygen generator sound absorption and noise reduction device and method and applied oxygen generator Download PDFInfo
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- CN107762802B CN107762802B CN201711157645.6A CN201711157645A CN107762802B CN 107762802 B CN107762802 B CN 107762802B CN 201711157645 A CN201711157645 A CN 201711157645A CN 107762802 B CN107762802 B CN 107762802B
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- 238000010521 absorption reaction Methods 0.000 title claims abstract description 102
- 230000009467 reduction Effects 0.000 title claims abstract description 52
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 239000001301 oxygen Substances 0.000 title claims abstract description 45
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 17
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 47
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 47
- 239000006260 foam Substances 0.000 claims abstract description 47
- 229920005830 Polyurethane Foam Polymers 0.000 claims abstract description 32
- 239000011496 polyurethane foam Substances 0.000 claims abstract description 32
- 229920001971 elastomer Polymers 0.000 claims description 14
- 238000009413 insulation Methods 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 11
- 239000002808 molecular sieve Substances 0.000 claims description 9
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 9
- 230000000903 blocking effect Effects 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 238000004080 punching Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 28
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 27
- 229910052757 nitrogen Inorganic materials 0.000 description 13
- 238000009434 installation Methods 0.000 description 5
- 238000013016 damping Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 208000002381 Brain Hypoxia Diseases 0.000 description 1
- 206010008479 Chest Pain Diseases 0.000 description 1
- 206010035148 Plague Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 241000607479 Yersinia pestis Species 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 239000006098 acoustic absorber Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 210000004556 brain Anatomy 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 208000002173 dizziness Diseases 0.000 description 1
- 230000003340 mental effect Effects 0.000 description 1
- 238000002640 oxygen therapy Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 208000023504 respiratory system disease Diseases 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000003584 silencer Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/0027—Pulsation and noise damping means
- F04B39/0033—Pulsation and noise damping means with encapsulations
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
- C01B13/02—Preparation of oxygen
- C01B13/0229—Purification or separation processes
- C01B13/0248—Physical processing only
- C01B13/0259—Physical processing only by adsorption on solids
- C01B13/0262—Physical processing only by adsorption on solids characterised by the adsorbent
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
- F04B39/121—Casings
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The invention discloses a device and a method for absorbing sound and reducing noise of an oxygenerator and the oxygenerator applied to the device and the method, and belongs to the field of oxygenerators. The invention relates to an oxygen generator sound absorption and noise reduction device, which comprises a sound-proof cover, wherein sound absorption plates are arranged on the inner surfaces of a side wall and an upper cover of the sound-proof cover, the sound absorption plates are any one or two of an aluminum foam sound absorption plate and a polyurethane foam sound absorption plate, and a bottom plate of the sound-proof cover is made of the aluminum foam sound absorption plate; the sound-proof cover is also provided with a sound gate communicated with the cavity of the sound-proof cover, the sound gate is provided with a fan, and the inner side wall of the sound gate is provided with a sound-gate sound-absorbing plate; the cavity of the sound-proof housing is internally provided with a double-layer microperforated plate which is arranged below the acoustic brake and is obliquely arranged. According to the invention, the noise waves of each frequency section are consumed to the maximum extent by analyzing the difference of the noise source frequencies of the oxygenerator, and the standing wave effect of the sound waves is reduced by changing the internal structure shape of the noise absorbing and reducing device; meanwhile, the diffraction path of noise is effectively blocked and isolated by utilizing the acoustic gate design.
Description
Technical Field
The invention relates to a molecular sieve oxygenerator, in particular to an oxygenerator sound absorption and noise reduction device and method and an oxygenerator applied to the same.
Background
Modern people have fast life rhythm and high mental and physical consumption, the brain is in a highly stressed state for a long time, cerebral hypoxia is extremely easy to cause, various uncomfortable symptoms such as dizziness and chest distress appear, and the oxygen inhalation auxiliary treatment effect of pregnant women and respiratory disease patients is very important. Therefore, the oxygenerator also gradually enters the common families, has irreplaceable important roles and wide development prospects for oxygen therapy and oxygen health care, improves the life quality of people, and brings health to anoxic people.
The working principle of the household oxygenerator is to utilize molecular sieve physical adsorption and desorption technology. The molecular sieve is filled in the oxygenerator, nitrogen in the air can be adsorbed when the oxygenerator is pressurized, and the rest unabsorbed oxygen is collected and purified to obtain high-purity oxygen, so that the oxygen production effect is achieved. The noise of the existing oxygenerator in the market is usually about 50dB, and if people are exposed to the noise environment for a long time, people can be irritated and irritated, and the oxygenerator can be a cause of various diseases. The problem of loud noise of the oxygenerator is also one of the main factors influencing consumers to purchase the oxygenerator, so reducing the noise of the oxygenerator is an important content for improving the use comfort of the household oxygenerator.
The noise sources of the oxygenerator are mainly mechanical noise generated when the air compressor works, noise generated when the nitrogen exhaust valve exhausts, mechanical noise generated when the damping spring of the air compressor reciprocates, and the like. The noise reduction scheme of the current oxygenerator mainly reduces noise in a sealing mode, a noise reduction cotton mode, a sound insulation layer mode, a silencer mode and the like, but the noise reduction effect is very limited because the noise reduction scheme is not specific to noise with different frequencies. In order to reduce the influence of the noise of the oxygenerator on a patient, a plurality of oxygenerator manufacturers are provided with a longer oxygen supply pipeline for the oxygenerator, and the noise influence is reduced by placing the oxygenerator at a distance, but the energy loss of a compressor is great because of the complex pipeline structure and long distance, so that the working efficiency of the oxygenerator is reduced, and the noise problem of the oxygenerator cannot be fundamentally solved.
The problem of noise in oxygenerators has long been a problem that plagues technicians. In order to solve the noise problem of the oxygenerator, many researchers have proposed many oxygenerator improvements. For example, the Chinese patent number ZL201620346381.3, the date of the grant notice is 2016, 9 and 14, and the invention is named: the utility model provides a seal structure for oxygenerator compressor box, this application relates to a seal structure for oxygenerator compressor box, and its seal box adopts the inside isolated noise transmission of vacuum chamber of bilayer shell, utilizes the vibrations that shock mount decay compressor during operation produced to set up the sound cotton of inhaling at seal box surface and the expansion portion inner wall of giving vent to anger and reduce noise energy. The application can reduce the noise of the oxygenerator to a certain extent, but the double-layer vacuum shell has complex structure, high manufacturing difficulty and high cost; the sound absorbing cotton arranged on the surface of the sealing box body has poor sound absorbing effect on noise with different frequencies, so that the noise problem of the oxygenerator is still not well solved.
For example, chinese patent application number 201511014179.7, the application publication date is 2016, 6, 8, and the invention is named: an oxygenerator with noise reduction function and a noise reduction method are disclosed, wherein a noise detector is arranged at the top of a machine core of the oxygenerator, a loudspeaker is arranged on a shell of the oxygenerator, the generating direction of the loudspeaker is sound production to the machine core, the noise detector and the loudspeaker are respectively connected with a main control board with an inverting amplifier on the machine core, so that a machine core noise signal detected by the noise detector is transmitted to the main control board, and the main control board amplifies and inverts the signal and transmits the signal to the loudspeaker to produce sound to the direction of the machine core. The noise source signal is transmitted to the inverting amplifier of the main control board through the noise detector to be amplified and inverted, and the amplified inverted signal is used for the noise source to drive the loudspeaker to send out the noise with the opposite phase to the noise source, so that the noise is reduced. However, in this application, in order to reduce the movement noise, an inverse noise source is added, the complexity of the structure is increased, the circuit control design is complicated, and the cost of the oxygenerator is increased; and it can only offset the mechanical noise of core, and can't realize effectively making an uproar to other noise such as nitrogen emission pertinence.
Disclosure of Invention
1. Technical problem to be solved by the invention
The invention aims to overcome the defects of single noise reduction control method, poor noise reduction effect and the like in the existing noise reduction scheme of the oxygen generator, and provides a sound absorption and noise reduction device and method of the oxygen generator and an applied oxygen generator, and by adopting the technical scheme of the invention, the sound absorption and noise reduction are performed pertinently by analyzing the difference of the noise source frequencies of the oxygen generator, the noise sound wave of each frequency section is consumed maximally, and the sound wave standing wave effect is reduced and the noise consumption is effectively promoted by changing the internal structure shape of the sound absorption and noise reduction device; meanwhile, aiming at the noise emitted by the fan air inlet of the oxygenerator, the diffraction path of the noise is effectively blocked and isolated by utilizing the sound brake design; the device has the characteristics of scientific and reasonable structure, compact layout, outstanding sound absorption and noise reduction effects and the like, so that the noise problem of the oxygen generator is well controlled.
2. Technical proposal
In order to achieve the above purpose, the technical scheme provided by the invention is as follows:
The invention relates to an oxygen generator sound absorption and noise reduction device, which comprises a sound-proof cover internally provided with an air compressor, wherein sound absorption plates are arranged on the inner surfaces of a side wall and an upper cover of the sound-proof cover, the sound absorption plates are any one or two of an aluminum foam sound absorption plate and a polyurethane foam sound absorption plate, and a bottom plate of the sound-proof cover is made of the aluminum foam sound absorption plate; the sound-proof cover is also provided with a sound gate which is communicated with the cavity of the sound-proof cover, the sound gate is provided with a fan, and the inner side wall of the sound gate is provided with a sound-proof gate sound-absorbing plate; the cavity of the sound-proof housing is internally provided with a double-layer microperforated plate positioned below the acoustic gate, and the double-layer microperforated plate is obliquely arranged in the sound-proof housing.
Further, a plurality of exhaust channels which are obliquely arranged are arranged on the bottom plate.
Furthermore, the side wall of the sound-proof housing is surrounded by a side wall plate, and the side wall plate, the upper cover and the bottom plate are connected through fastening bolts and rubber gasket rings; the sound brake is connected with the sound-proof cover through a fastening bolt, and a rubber sealing ring is further arranged between the sound brake and the sound-proof cover.
Furthermore, the shape of the acoustic gate is trapezoid, the acoustic gate acoustic board is an aluminum foam acoustic board or a micro-perforation acoustic board, and the acoustic gate acoustic board is installed on the inner side wall of the acoustic gate in a spaced mode through a connecting column; the sound-absorbing boards arranged on one pair of opposite side walls of the sound-proof housing are polyurethane foam sound-absorbing boards, the sound-absorbing boards arranged on the other pair of opposite side walls are aluminum foam sound-absorbing boards, and the sound-absorbing boards arranged on the upper cover of the sound-proof housing are polyurethane foam sound-absorbing boards.
Furthermore, the sound absorption surface of the polyurethane foam sound absorption plate is pyramid-shaped or wavy or wedge-shaped, the polyurethane foam sound absorption plate is stuck in the sound insulation cover, and the thickness of the polyurethane foam sound absorption plate is less than or equal to 25mm; the aluminum foam sound absorbing plate is installed in the sound-proof housing in a spaced mode through the connecting columns, the thickness of the aluminum foam sound absorbing plate is smaller than or equal to 10mm, and the spaced thickness of the aluminum foam sound absorbing plate is smaller than or equal to 5mm.
Still further, the double-layer microperforated panel comprises a first microperforated panel and a second microperforated panel, and the first microperforated panel and the second microperforated panel are connected through a connecting column to form an air layer.
Further, the area of the double-layer microperforated panel is 40% of the area of the upper surface, and the inclination angle of the double-layer microperforated panel is less than or equal to 85 °.
Furthermore, the first micro-perforated plate and the second micro-perforated plate are made of metal plates with the thickness smaller than or equal to 1mm, the perforation aperture is smaller than or equal to 1mm, and the perforation area is 1% -5%; the thickness of the air layer between the first micro-perforated plate and the second micro-perforated plate is less than or equal to 5mm.
The invention relates to an oxygenerator applying the oxygenerator sound absorption and noise reduction device, wherein an air compressor of the oxygenerator is arranged on a bottom plate of a sound-proof housing, and an air inlet filter, a reversing valve and a molecular sieve which are matched with the air compressor are also arranged on the sound-proof housing.
According to the sound absorption and noise reduction method of the oxygen generator, according to the noise source frequency of the oxygen generator, the inner wall of the sound-proof housing of the oxygen generator is provided with the sound absorption plate for consuming middle-high frequency noise, the sound absorption plate adopts any one or two combination of an aluminum foam sound absorption plate and a polyurethane foam sound absorption plate, and the cavity of the sound-proof housing of the oxygen generator is obliquely provided with a double-layer microperforated plate for consuming middle-low frequency noise so as to change the inner structure of the sound-proof housing to reduce the standing wave phenomenon of sound energy; and an acoustic brake for consuming the acoustic energy diffracted by the air inlet is arranged at the air inlet of the fan of the oxygenerator so as to block and isolate the diffraction path of noise.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following remarkable effects:
(1) The invention relates to a sound absorption and noise reduction device and a method for an oxygen generator, which are characterized in that sound absorption plates are arranged on the inner surfaces of a side wall and an upper cover of a sound-proof housing, the sound absorption plates are any one or two of an aluminum foam sound absorption plate and a polyurethane foam sound absorption plate, and a bottom plate of the sound-proof housing is made of the aluminum foam sound absorption plate; the sound-proof cover is also provided with a sound gate communicated with the cavity of the sound-proof cover, the sound gate is provided with a fan, and the inner side wall of the sound gate is provided with a sound-gate sound-absorbing plate; a double-layer microperforated panel positioned below the acoustic gate is arranged in the cavity of the sound-proof housing, and the double-layer microperforated panel is obliquely arranged in the sound-proof housing; the noise source frequency of the oxygenerator is analyzed to pertinently absorb and reduce noise, noise waves of each frequency section are consumed maximally, and the shape of the internal structure of the noise absorbing and reducing device is changed, so that the standing wave effect of the sound waves is reduced, and the noise consumption is effectively promoted; meanwhile, aiming at the noise emitted by the fan air inlet of the oxygenerator, the diffraction path of the noise is effectively blocked and isolated by utilizing the sound brake design; the device has the characteristics of scientific and reasonable structure, compact layout, outstanding sound absorption and noise reduction effects and the like, so that the noise problem of the oxygen generator is well controlled;
(2) According to the sound absorption and noise reduction device for the oxygen generator, the plurality of exhaust channels which are obliquely arranged are arranged on the bottom plate, so that the sound absorption area is increased, the sound absorption effect is improved, and sound waves diffracted through the exhaust ports are effectively consumed; meanwhile, the bottom plate made of the aluminum foam sound absorbing plate is an excellent conductor for heat conduction, and can conduct a large amount of heat while exhausting waste gas such as nitrogen and the like so as to prevent the air compressor from reducing the actual power due to overhigh temperature;
(3) According to the sound absorption and noise reduction device of the oxygenerator, the side wall of the sound insulation cover is surrounded by the side wall plate, the upper cover and the bottom plate are connected through the fastening bolts and the rubber gasket, the sound gate is connected with the sound insulation cover through the fastening bolts, and the rubber gasket is arranged between the sound gate and the sound insulation cover; the rubber gasket and the rubber sealing ring are arranged at each connecting part of the sound-proof cover, so that the sealing effect can be achieved, gap sound leakage caused by sound wave diffraction can be prevented, and a sound bridge can be prevented from being formed through the damping effect;
(4) According to the sound absorption and noise reduction device for the oxygen generator, the shape of the sound gate is trapezoid, and the sound gate with a trapezoid structure effectively eliminates the sound wave standing wave effect caused by the parallel cover wall; the sound gate sound absorbing plate is an aluminum foam sound absorbing plate or a micro-perforation sound absorbing plate, and is installed on the inner side wall of the sound gate in a spaced mode through a connecting column, and the aluminum foam sound absorbing plate or the micro-perforation sound absorbing plate is utilized to consume sound energy and block a diffraction path of sound waves;
(5) The invention relates to an oxygen generator sound absorption and noise reduction device, wherein sound absorption plates arranged on a pair of opposite side walls of a sound-proof housing are polyurethane foam sound absorption plates, sound absorption plates arranged on the other pair of opposite side walls are aluminum foam sound absorption plates, and sound absorption plates arranged on an upper cover of the sound-proof housing are polyurethane foam sound absorption plates; the sound absorption surface of the polyurethane foam sound absorption board is pyramid-shaped or wavy or wedge-shaped, so that a sound absorption wedge is formed, and medium-high frequency noise can be effectively absorbed; the aluminum foam sound absorbing plate is provided with a large number of tiny gaps and holes which are internally and externally communicated, when sound waves are incident on the porous material, the sound waves can enter the material along the micropores to cause the vibration of air in the gaps, and a considerable part of sound energy is converted into heat energy to be lost due to viscous resistance of the air, friction and heat conduction effect of the air and the hole wall and the like;
(6) The invention relates to a sound absorption and noise reduction device of an oxygenerator, wherein a double-layer microperforated plate comprises a first microperforated plate and a second microperforated plate, the first microperforated plate and the second microperforated plate are connected through connecting columns to form an air layer, and an air inlet sound absorption channel is formed through the installation of the double-layer microperforated plate, so that the diffraction path of sound waves is absorbed and blocked; when sound waves pass through, the air column in the small hole reciprocates to cause friction to consume sound energy;
(7) According to the oxygenerator with the sound absorption and noise reduction device, noise generated by the oxygenerator is greatly reduced, so that the oxygenerator can run quietly, the use requirement of a patient is met, and the use comfort of the household oxygenerator is improved.
Drawings
FIG. 1 is a schematic diagram of a sound absorbing and reducing device for an oxygenerator;
FIG. 2 is a schematic view of the structure of an acoustic brake in an apparatus for absorbing and reducing noise of an oxygen generator according to the present invention;
FIG. 3 is a schematic view of a double-layer microperforated panel in an oxygenerator sound absorption and noise reduction device according to the present invention;
FIG. 4 is a schematic view of the structure of a first microperforated panel and a second microperforated panel in an oxygen generator sound absorbing and reducing device according to the present invention;
FIG. 5 is a schematic view of the structure of the bottom plate in the oxygenerator sound absorption and noise reduction device of the invention;
FIG. 6 is a schematic view showing the bottom view of the upper cover of the oxygenerator sound absorbing and reducing device according to the present invention;
FIG. 7 is a schematic side view of the upper cover of the oxygenerator sound absorbing and reducing device of the present invention;
FIG. 8 is a schematic view of the installation structure of a polyurethane foam acoustic panel in an oxygenerator acoustic absorber device of the present invention;
Fig. 9 is a schematic view of an installation structure of an aluminum foam sound absorbing plate in an oxygen generator sound absorbing and reducing device.
Reference numerals in the schematic drawings illustrate:
1. A soundproof cover; 2. a bottom plate; 2-1, an exhaust passage; 2-2, mounting holes; 3. an upper cover; 3-1, an air inlet of a fan; 3-2, an air inlet of an air inlet filter; 3-3, a reversing valve nitrogen exhaust port; 4. an acoustic brake; 5. an acoustic brake absorber; 6. a blower; 7. a double layer microperforated panel; 7-1, a first microperforated panel; 7-2, a second microperforated panel; 7-3, air layer; 7-4, a mounting seat; 8. an aluminum foam sound absorbing panel; 9. polyurethane foam acoustic panels; 10. an intake air filter; 11. an air compressor; 113. rubber sealing ring 2, fastening bolt; .
Detailed Description
For a further understanding of the present invention, the present invention will be described in detail with reference to the drawings and examples.
Example 1
Referring to fig. 1, the sound absorption and noise reduction device for an oxygenerator according to this embodiment includes a sound-proof housing 1 with an air compressor 11 installed therein, wherein a side wall and an upper cover 3 of the sound-proof housing 1 are made of metal plates such as galvanized plates and steel plates, and sound absorption plates are disposed on inner surfaces of the side wall and the upper cover 3 of the sound-proof housing 1, and the sound absorption plates can be any one or two of an aluminum foam sound absorption plate 8 and a polyurethane foam sound absorption plate 9, and are used for consuming middle-high frequency noise energy generated in the oxygenerator operation, and blocking and isolating diffraction of noise. The bottom plate 2 of the sound-proof housing 1 is made of an aluminum foam sound-absorbing plate, as shown in fig. 5, a plurality of exhaust channels 2-1 which are obliquely arranged and mounting holes 2-2 for mounting the air compressor 11 are formed in the bottom plate 2, the obliquely arranged exhaust channels 2-1 increase the sound-absorbing area, the sound-absorbing effect is improved, and sound waves diffracted through the exhaust ports are effectively consumed; meanwhile, the bottom plate 2 made of the aluminum foam sound absorbing plate is an excellent conductor for heat conduction, and can conduct a large amount of heat while exhausting waste gas such as nitrogen gas, so as to prevent the air compressor from reducing the actual power due to overhigh temperature. As shown in fig. 1 and 2, the sound-proof cover 1 is also provided with a sound gate 4 communicated with the cavity of the sound-proof cover 1, the sound gate 4 is provided with a fan 6, the fan 6 is preferably an axial flow fan, and the inner side wall of the sound gate 4 is provided with a sound gate sound-absorbing plate 5 for blocking and isolating diffraction paths of noise; in the embodiment, the shape of the acoustic gate 4 is trapezoid, and the acoustic gate 4 with a trapezoid structure effectively eliminates the acoustic standing wave effect caused by the parallel cover wall; the sound gate sound absorbing plate 5 is an aluminum foam sound absorbing plate or a micro-perforation sound absorbing plate, the sound gate sound absorbing plate 5 is installed on the inner side wall of the sound gate 4 in a spaced mode through a connecting column, an air layer is formed between the sound gate sound absorbing plate 5 and the inner side wall of the sound gate 4, the connecting column is preferably a copper column, the thickness of the air layer is smaller than or equal to 5mm, the thickness of the sound gate sound absorbing plate 5 is smaller than or equal to 10mm, the micro-perforation sound absorbing plate can be made by punching a metal plate, and the aluminum foam sound absorbing plate or the micro-perforation sound absorbing plate is used as a diffraction path for consuming sound energy and blocking sound waves by the sound gate sound absorbing plate 5. A double-layer micro-perforated plate 7 positioned below the acoustic gate 4 is arranged in the cavity of the sound-proof housing 1, and the double-layer micro-perforated plate 7 is obliquely arranged in the sound-proof housing 1 and is mainly used for consuming middle and low frequency noise; as shown in fig. 3, the double-layer microperforated panel 7 comprises a first microperforated panel 7-1 and a second microperforated panel 7-2, and an air layer 7-3 is formed by connecting the first microperforated panel 7-1 and the second microperforated panel 7-2 through connecting columns, wherein the connecting columns are copper columns, the inner structural shape of the sound absorption and noise reduction device is changed by the double-layer microperforated panel 7, the standing wave effect of sound waves is reduced, and the noise consumption is effectively promoted. In the embodiment, the area of the double-layer micro-perforated plate 7 is 40% of the area of the upper cover 3, the inclination angle of the double-layer micro-perforated plate 7 is less than or equal to 85 DEG, and the double-layer micro-perforated plate 7 is fixed in the sound insulation cover 1 through the mounting seat 7-4; moreover, as shown in FIG. 4, the first micro-perforated plate 7-1 and the second micro-perforated plate 7-2 are made of metal plates with the thickness less than or equal to 1mm, the perforation aperture is less than or equal to 1mm, and the perforation area is 1% -5%; the thickness of the air layer 7-3 between the first microperforated panel 7-1 and the second microperforated panel 7-2 is less than or equal to 5mm; an air inlet sound absorption channel is formed through the installation of the double-layer microperforated panel 7, the diffraction path of sound waves is absorbed and blocked, and when the sound waves pass through, the air column in the small hole reciprocates to cause friction and consume sound energy; and, double-deck microperforated panel 7 still forms the inlet channel with upper cover 3 and the side wall of sound proof housing 1, and the noise is through the outside diffraction of inlet channel to the reduction.
In this embodiment, as shown in fig. 1, the side wall of the sound-proof housing 1 is surrounded by a side wall plate, and the side wall plate, the upper cover 3 and the bottom plate 2 are connected by fastening bolts 12 and rubber gasket rings; the sound brake 4 is connected with the sound insulation cover 1 through a fastening bolt 12, and a rubber sealing ring 13 is further arranged between the sound brake 4 and the sound insulation cover 1. Each connecting part of the sound-proof cover 1 is provided with a rubber gasket and a rubber sealing ring 13, so that the sound-proof cover not only can play a sealing role and prevent sound leakage of gaps of sound wave diffraction, but also can prevent the formation of a sound bridge through a damping effect. In addition, in the present embodiment, the sound absorbing boards disposed on one pair of opposite side walls of the sound-proof housing 1 are polyurethane foam sound absorbing boards 9, the sound absorbing boards disposed on the other pair of opposite side walls are aluminum foam sound absorbing boards 8, and the sound absorbing boards disposed on the upper cover 3 of the sound-proof housing 1 are polyurethane foam sound absorbing boards 9; the sound absorption surface of the polyurethane foam sound absorption plate 9 is in a pyramid shape (shown in fig. 8) or a wave shape (shown in fig. 7) or a wedge shape, the polyurethane foam sound absorption plate 9 is stuck in the sound insulation cover 1, and the thickness of the polyurethane foam sound absorption plate 9 is less than or equal to 25mm, so that a sound absorption wedge can be formed, and medium-high frequency noise generated by an air compressor and a spring of the oxygenerator can be effectively absorbed; the aluminum foam sound absorbing plate 8 is installed in the sound-proof housing 1 in a spaced mode through the connecting columns (shown in fig. 9), the thickness of the aluminum foam sound absorbing plate 8 is smaller than or equal to 10mm, the spaced thickness of the aluminum foam sound absorbing plate 8 is smaller than or equal to 5mm, the connecting columns also adopt copper columns, the aluminum foam sound absorbing plate 8 is provided with a large number of tiny gaps and holes communicated with the inside and the outside, when sound waves are incident on the porous material, the sound waves can enter the inside of the material along the micropores, vibration of air in the gaps is caused, and a considerable part of sound energy is converted into heat energy to be lost due to viscous resistance of the air, friction and heat conduction effect of the air and the hole wall and the like.
According to the sound absorption and noise reduction device for the oxygen generator, the sound absorption and noise reduction are carried out in a targeted mode by analyzing the difference of the noise source frequencies of the oxygen generator, noise waves of all frequency bands are consumed to the maximum extent, and the sound-proof cover inner structure shape of the sound absorption and noise reduction device is changed, so that the sound wave standing wave effect is reduced, and the noise consumption is effectively promoted; meanwhile, aiming at the noise emitted by the fan air inlet of the oxygenerator, the diffraction path of the noise is effectively blocked and isolated by utilizing the sound brake design; the device has the characteristics of scientific and reasonable structure, compact layout, outstanding sound absorption and noise reduction effects and the like, so that the noise problem of the oxygen generator is well controlled.
Example 2
As shown in fig. 1, an oxygenerator according to the present embodiment is applied with the oxygenerator sound absorption and noise reduction device according to embodiment 1. In this embodiment, the air compressor 11 of the oxygenerator is mounted on the base plate 2 of the sound-proof housing 1, and four mounting holes 2-2 (as shown in fig. 5) for fixing spring legs of the air compressor 11 are provided on the base plate 2. The sound-proof housing 1 is also provided with an air inlet filter 10, a reversing valve and a molecular sieve which are matched with the air compressor 11, specifically, the air inlet filter 10, the reversing valve and the sound gate 4 are all arranged on an upper cover 3 of the sound-proof housing 1, as shown in figure 6, the upper cover 3 of the sound-proof housing 1 is provided with a fan air inlet 3-1, an air inlet 3-2 of the air inlet filter and a nitrogen air outlet 3-3 of the reversing valve, the sound gate 4 is fixed on the upper cover 3 through screws, a rubber sealing ring 13 is arranged between the sound gate 4 and the upper cover 3, the fan air inlet 3-1 is positioned in the sound gate 4, a fan 6 is arranged on the sound gate 4, and the air inlet direction of the fan 6 is staggered with the positions of the sound gate 4 and the fan air inlet 3-1 on the upper cover 3; the air inlet filter 10 and the reversing valve are respectively fixed on the upper cover 3, and the air pipelines of the air inlet filter 10 and the reversing valve respectively penetrate into the sound-proof housing 1 from the air inlet 3-2 of the air inlet filter and the nitrogen outlet 3-3 of the reversing valve. The connection relationship among the air compressor 11, the molecular sieve, the air inlet filter 10, the reversing valve and other components is the same as that of the prior art, and the oxygen generation principle is the same as that of the prior molecular sieve oxygen generator, so that the details are not repeated here.
In the oxygenerator of the embodiment, the exhaust ports of the air compressor 11, nitrogen and the like are all arranged in the sound-proof housing 1, and almost all noise sources are concentrated, so that the corresponding sound absorption and noise reduction methods are adopted for different noise frequencies, and the comprehensive control of the oxygenerator noise is realized. When the air compressor 11 works, air is sucked from the air inlet filter 10, compressed air adsorbs nitrogen in the air under the action of the molecular sieve, residual unadsorbed oxygen is collected and becomes high-purity oxygen after purification treatment, the nitrogen is released into the sound-proof housing 1, the fan 6 supplies air into the sound-proof housing 1, air convection is formed between the nitrogen and the air channel 2-1 on the bottom plate 2, and waste gas such as nitrogen and heat generated by the air compressor are taken away. In the working process, the middle and high frequency noise generated by the air compressor 11 and the supporting damping springs thereof is consumed by the sound absorbing boards on the side wall, the bottom plate 2 and the upper cover 3 of the sound-proof housing 1, and meanwhile, the inner structure of the sound-proof housing 1 is changed by utilizing the double-layer microperforated plate 7 in the sound-proof housing 1, so that the sound wave standing wave effect is avoided, and the consumption of noise is promoted. The periodic exhaust sound of the nitrogen exhaust valve is an aerodynamic noise source for generating middle-low frequency noise, an aluminum foam sound absorbing plate 8 is arranged in the sound-proof housing 1, the aluminum foam sound absorbing plate 8 is provided with a large number of tiny gaps and holes communicated with the inside and the outside, when sound waves are incident on a porous material, the sound waves can enter the inside of the material along micropores, and the air in the gaps is vibrated; a substantial portion of the acoustic energy is converted to heat energy and lost due to viscous drag of the air, friction and heat transfer of the air with the walls of the holes, and the like. At the same time, the vent of the blower 6 is a main channel for noise propagation, through the installation of the acoustic lock 4, and the sound absorption treatment is performed in the acoustic lock 4, so that the acoustic energy is consumed and the diffraction path of the acoustic wave is blocked. The oxygenerator has the characteristics of scientific and reasonable structure, compact layout, outstanding sound absorption and noise reduction effects and the like, so that the noise problem of the oxygenerator is well controlled, the use requirement of a patient is met, and the use comfort of the household oxygenerator is improved.
Example 3
The embodiment also discloses a sound absorption and noise reduction method of the oxygen generator, in the method, according to the noise source frequency of the oxygen generator, a sound absorption plate for consuming middle-high frequency noise is arranged on the inner wall of the sound-proof housing 1 of the oxygen generator, the sound absorption plate adopts any one or two combination of an aluminum foam sound absorption plate 8 and a polyurethane foam sound absorption plate 9, a double-layer microperforated plate 7 for consuming middle-low frequency noise is obliquely arranged in the cavity of the sound-proof housing 1 of the oxygen generator, the double-layer microperforated plate 7 consists of a first microperforated plate 7-1 and a second microperforated plate 7-2, and an air layer 7-3 is formed between the first microperforated plate 7-1 and the second microperforated plate 7-2 through connection columns so as to change the internal structure of the sound-proof housing 1 to reduce the standing wave phenomenon of sound energy; and an air inlet of a fan 6 of the oxygenerator is provided with an acoustic gate 4 for consuming the diffraction sound energy of the air inlet, an acoustic gate sound absorbing plate 5 is arranged on the inner side wall of the acoustic gate 4, and the acoustic gate sound absorbing plate 5 is an aluminum foam sound absorbing plate or a microperforated sound absorbing plate for blocking and isolating the diffraction path of noise.
According to the sound absorption and noise reduction method for the oxygenerator, the relative sound absorption and noise reduction technologies are adopted according to different noise sources of the oxygenerator, and the sound absorption and noise reduction technologies are organically combined together, so that the noise generated by the oxygenerator is greatly reduced, the oxygenerator can be operated quietly, the use requirement of a patient is met, and the use comfort of the household oxygenerator is improved.
The invention relates to an oxygen generator sound absorption and noise reduction device and method and an applied oxygen generator, wherein sound absorption plates are arranged on the inner surfaces of a side wall and an upper cover of a sound-proof housing, the sound absorption plates are any one or two of an aluminum foam sound absorption plate and a polyurethane foam sound absorption plate, and a bottom plate of the sound-proof housing is made of the aluminum foam sound absorption plate; the sound-proof cover is also provided with a sound gate communicated with the cavity of the sound-proof cover, the sound gate is provided with a fan, and the inner side wall of the sound gate is provided with a sound-gate sound-absorbing plate; a double-layer microperforated panel positioned below the acoustic gate is arranged in the cavity of the sound-proof housing, and the double-layer microperforated panel is obliquely arranged in the sound-proof housing; the noise source frequency of the oxygenerator is analyzed to pertinently absorb and reduce noise, noise waves of each frequency section are consumed maximally, and the shape of the internal structure of the noise absorbing and reducing device is changed, so that the standing wave effect of the sound waves is reduced, and the noise consumption is effectively promoted; meanwhile, aiming at the noise emitted by the fan air inlet of the oxygenerator, the diffraction path of the noise is effectively blocked and isolated by utilizing the sound brake design; the device has the characteristics of scientific and reasonable structure, compact layout, outstanding sound absorption and noise reduction effects and the like, so that the noise problem of the oxygen generator is well controlled.
The invention and its embodiments have been described above schematically, without limitation, and the actual construction is not limited to this, as it is shown in the drawings, which are only one of the embodiments of the invention. Therefore, if one of ordinary skill in the art is informed by this disclosure, a structural manner and an embodiment similar to the technical scheme are not creatively devised without departing from the gist of the present invention, and all the structural manners and the embodiments belong to the protection scope of the present invention.
Claims (8)
1. The utility model provides an oxygenerator sound absorption device of making an uproar, includes sound-proof housing (1) of internally mounted air compressor (11), the side wall of sound-proof housing (1) and the internal surface of upper cover (3) on all be equipped with the acoustic baffle, its characterized in that: the sound absorbing plate is any one or two of an aluminum foam sound absorbing plate (8) and a polyurethane foam sound absorbing plate (9), the bottom plate (2) of the sound insulating cover (1) is made of the aluminum foam sound absorbing plate, and a plurality of exhaust channels (2-1) which are obliquely arranged are arranged on the bottom plate (2); the sound-proof cover (1) is also provided with a sound gate (4) communicated with the cavity of the sound-proof cover (1), the sound gate (4) is provided with a fan (6), the inner side wall of the sound gate (4) is provided with a sound gate sound-absorbing plate (5), the sound gate (4) is trapezoid, the sound gate sound-absorbing plate (5) is an aluminum foam sound-absorbing plate or a micro-perforation sound-absorbing plate, and the sound gate sound-absorbing plate (5) is installed on the inner side wall of the sound gate (4) in a spaced mode through a connecting column; the sound-proof cover is characterized in that a double-layer microperforated plate (7) located below the sound gate (4) is arranged in a cavity of the sound-proof cover (1), the double-layer microperforated plate (7) is obliquely installed in the sound-proof cover (1), the double-layer microperforated plate (7) comprises a first microperforated plate (7-1) and a second microperforated plate (7-2), and the first microperforated plate (7-1) and the second microperforated plate (7-2) are connected through connecting columns to form an air layer (7-3).
2. The oxygenerator sound absorption and noise reduction device according to claim 1, wherein: the side wall of the sound-proof housing (1) is surrounded by a side wall plate, and the side wall plate, the upper cover (3) and the bottom plate (2) are connected with a rubber gasket ring through fastening bolts (12); the sound brake (4) is connected with the sound-proof housing (1) through a fastening bolt (12), and a rubber sealing ring (13) is arranged between the sound brake (4) and the sound-proof housing (1).
3. The oxygenerator sound absorption and noise reduction device according to claim 1, wherein: the sound-absorbing boards arranged on a pair of opposite side walls of the sound-proof housing (1) are polyurethane foam sound-absorbing boards (9), the sound-absorbing boards arranged on the other pair of opposite side walls are aluminum foam sound-absorbing boards (8), and the sound-absorbing boards arranged on the upper cover (3) of the sound-proof housing (1) are polyurethane foam sound-absorbing boards (9).
4. A sound absorbing and reducing device for an oxygen generator according to claim 3, wherein: the sound absorption surface of the polyurethane foam sound absorption plate (9) is in a pyramid shape or a wave shape or a wedge shape, the polyurethane foam sound absorption plate (9) is stuck in the sound insulation cover (1), and the thickness of the polyurethane foam sound absorption plate (9) is smaller than or equal to 25mm; the aluminum foam sound absorbing plate (8) is installed in the sound-proof housing (1) in a spaced mode through the connecting columns, the thickness of the aluminum foam sound absorbing plate (8) is smaller than or equal to 10mm, and the spaced thickness of the aluminum foam sound absorbing plate (8) is smaller than or equal to 5mm.
5. The oxygenerator sound absorption and noise reduction device according to claim 1, wherein: the area of the double-layer micro-perforated plate (7) is 40% of the area of the upper cover (3), and the inclination angle of the double-layer micro-perforated plate (7) is less than or equal to 85 degrees.
6. The oxygenerator sound absorption and noise reduction device according to claim 5, wherein: the first microperforated panel (7-1) and the second microperforated panel (7-2) are made of metal plates with the thickness smaller than or equal to 1mm by punching, the punching aperture is smaller than or equal to 1mm, and the punching area is 1% -5%; the thickness of the air layer (7-3) between the first microperforated panel (7-1) and the second microperforated panel (7-2) is less than or equal to 5mm.
7. An oxygenerator using the oxygenerator sound absorption and noise reduction device of any one of claims 1 to 6, wherein an air compressor (11) of the oxygenerator is arranged on a bottom plate (2) of a sound insulation cover (1), and an air inlet filter (10), a reversing valve and a molecular sieve which are matched with the air compressor (11) for use are further arranged on the sound insulation cover (1).
8. A sound absorption and noise reduction method for an oxygenerator is characterized in that: according to the noise source frequency of the oxygenerator, a sound absorbing plate for consuming medium-high frequency noise is arranged on the inner wall of the sound-proof housing (1) of the oxygenerator, the sound absorbing plate is any one or two of an aluminum foam sound absorbing plate (8) and a polyurethane foam sound absorbing plate (9), the sound absorbing surface of the polyurethane foam sound absorbing plate (9) is pyramid-shaped or wave-shaped or wedge-shaped, the polyurethane foam sound absorbing plate (9) is stuck in the sound-proof housing (1), the thickness of the polyurethane foam sound absorbing plate (9) is smaller than or equal to 25mm, the aluminum foam sound absorbing plate (8) is installed in the sound-proof housing (1) in a spaced mode through a connecting column, the thickness of the aluminum foam sound absorbing plate (8) is smaller than or equal to 10mm, and the spaced thickness of the aluminum foam sound absorbing plate (8) is smaller than or equal to 5mm; a double-layer microperforated plate (7) for consuming middle-low frequency noise is obliquely arranged in a cavity of a sound-proof cover (1) of the oxygen generator, the double-layer microperforated plate (7) consists of a first microperforated plate (7-1) and a second microperforated plate (7-2), and an air layer (7-3) is formed between the first microperforated plate (7-1) and the second microperforated plate (7-2) through connection columns for changing the internal structure of the sound-proof cover (1) so as to reduce the standing wave phenomenon of sound energy; and an air inlet of a fan (6) of the oxygenerator is provided with an acoustic gate (4) for consuming the diffraction acoustic energy of the air inlet, an acoustic gate acoustic board (5) is arranged on the inner side wall of the acoustic gate (4), and the acoustic gate acoustic board (5) is an aluminum foam acoustic board or a microperforated acoustic board for blocking and isolating the diffraction path of noise.
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| CN201711157645.6A CN107762802B (en) | 2017-11-20 | 2017-11-20 | Oxygen generator sound absorption and noise reduction device and method and applied oxygen generator |
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| CN207701319U (en) * | 2017-11-20 | 2018-08-07 | 刘峰 | A kind of oxygenerator sqouynd absorption lowering noise device and the oxygenerator of application |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CH551601A (en) * | 1972-05-12 | 1974-07-15 | Milster John | SOUND-ABSORBING EXHAUST AIR DUCT LOCATED ABOVE A WINDOW. |
| KR200335776Y1 (en) * | 2003-09-25 | 2003-12-11 | 주식회사 대우일렉트로닉스 | Oxygen generator reducible noise |
| KR200347871Y1 (en) * | 2004-01-10 | 2004-04-29 | 주식회사 옥서스 | Gaseous noise prevented apparatus for oxygen compressor |
| CN2761578Y (en) * | 2004-12-22 | 2006-03-01 | 姚廉卿 | Automatic aerator for automobile |
| DE102009007891A1 (en) * | 2009-02-07 | 2010-08-12 | Willsingh Wilson | Resonance sound absorber in multilayer design |
| RU2439253C1 (en) * | 2010-08-20 | 2012-01-10 | Олег Савельевич Кочетов | Acoustically comfortable room with noise protective equipment |
| WO2013038342A1 (en) * | 2011-09-13 | 2013-03-21 | Koninklijke Philips Electronics N.V. | Portable oxygen concentrator |
| CN205578276U (en) * | 2016-04-21 | 2016-09-14 | 天津市博思特生物科技有限公司 | A seal structure for oxygenerator compressor box |
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| CN207701319U (en) * | 2017-11-20 | 2018-08-07 | 刘峰 | A kind of oxygenerator sqouynd absorption lowering noise device and the oxygenerator of application |
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Effective date of registration: 20240428 Address after: No. 488, 4th Floor, West Annex Building, Yanshan Investment Building, Bengshan District, Bengbu City, Anhui Province, 233099 Applicant after: Heyi Medical Technology (Bengbu) Co.,Ltd. Country or region after: China Address before: Room 302, Unit 3, Building 1, No. 459 Gongnong Road, Bengshan District, Bengbu City, Anhui Province, 233000 Applicant before: Liu Feng Country or region before: China |
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