CN109854487A - A kind of air compressor machine having decrease of noise functions - Google Patents
A kind of air compressor machine having decrease of noise functions Download PDFInfo
- Publication number
- CN109854487A CN109854487A CN201811484094.9A CN201811484094A CN109854487A CN 109854487 A CN109854487 A CN 109854487A CN 201811484094 A CN201811484094 A CN 201811484094A CN 109854487 A CN109854487 A CN 109854487A
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- Prior art keywords
- sweep
- noise reduction
- air accumulator
- blimp
- microphone
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- 238000010521 absorption reaction Methods 0.000 claims abstract description 9
- 230000035939 shock Effects 0.000 claims abstract description 9
- 230000007246 mechanism Effects 0.000 claims abstract description 8
- 230000009467 reduction Effects 0.000 claims description 55
- 238000009434 installation Methods 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 8
- 230000008054 signal transmission Effects 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 6
- 238000013016 damping Methods 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 description 10
- 238000007689 inspection Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000005662 electromechanics Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B3/00—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor
- B62B3/02—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving parts being adjustable, collapsible, attachable, detachable or convertible
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B5/00—Accessories or details specially adapted for hand carts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B5/00—Accessories or details specially adapted for hand carts
- B62B5/06—Hand moving equipment, e.g. handle bars
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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
-
- 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
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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
- F04B41/00—Pumping installations or systems specially adapted for elastic fluids
- F04B41/02—Pumping installations or systems specially adapted for elastic fluids having reservoirs
Abstract
What the present invention designed has the air compressor machine of decrease of noise functions, air accumulator is specifically located on the sweep of cart, cart includes sweep, the flexible vehicle frame of sweep side and the idler wheel of sweep bottom, sweep is hollow double-layer structure, flexible vehicle frame is by i.e. usable fork truck has looked into the direct mobile compressor of sweep afterwards on earth, the middle position on upper layer is fixedly connected with a semi-circular bracket, the semi-circular bracket adapts to the shape of air accumulator to place air accumulator, gap fork truck between sweep upper layer and lower layer can be inserted into, the lower surface of the sweep is equipped with four fixed columns that can be stretched downwards, the flexible of fixed column passes through motor driven, driving switch is located on sweep, the bottom surface of fixed column is equipped with cushion, the outer surface two sides of the air accumulator are connected with telescopic side stand by buckle, ground is extended substantially downward to after side stand elongation, the end of side stand is equipped with spring Damping, the bottom cushion of fixed column and the spring shock absorption mechanism of side stand end play the role of damping jointly.
Description
Technical field
The present invention relates to a kind of air compressor machines, and in particular to a kind of air compressor machine for having decrease of noise functions.
Background technique
Currently, many factories will use air compressor machine persistently to export stable compressed air in process of production, each equipment is given
Air pressure is provided, air compressor is the basic product of the modernization of industry, just has entirely pneumatic contain in the electrical and automation often said
Justice；And air compressor is just to provide gas source power, is the main body in the core equipment electromechanics bleed source device of pneumatic system, it
It is the device that the mechanical energy of former dynamic (usually motor) is converted into gas pressure energy, is that the air pressure of compressed air fills
It sets.
Summary of the invention
The present invention is intended to provide a kind of air compressor machine for having decrease of noise functions.
To realize the above-mentioned technical purpose, the present invention uses following technical scheme, a kind of air compressor machine having decrease of noise functions, institute
The air accumulator including being arranged on cart is stated, is equipped with blimp above air accumulator, the hinged air accumulator of blimp bottom end is another
Air accumulator is lockked by buckle in end, and blimp two sidewalls are equipped with cooling pipe, and cylinder is equipped in blimp and active noise reduction fills
It sets, the active noise reducing device includes that incoming device, central data processor and noise reduction unit, incoming device include Mike
Wind, microphone are arbitrarily installed at the one of blimp, and noise reduction unit includes at least two noise reduction boxes, and the noise reduction box is located at
The bottom of blimp, face air accumulator, equipped at least one noise reduction horn and there are the space of installation microphone in noise reduction box,
The microphone and noise reduction horn are connect with central data processor, and central data processor loads denoising device self-test mould
Block, selftest module receive and process the own system signal of device report to determine whether there is the increasing of microphone and noise reduction horn
Add, while being equipped with timing detection module in selftest module, the central data processor is mounted on a noise reduction of noise reduction unit
In box, while the inner sidewall of blimp is equipped with several cooling fins, and air accumulator is specifically located on the sweep of cart, cart packet
The idler wheel of sweep, the flexible vehicle frame of sweep side and sweep bottom is included, sweep is hollow double-layer structure, and the middle position on upper layer is solid
Surely a semi-circular bracket is connected, which adapts to the shape of air accumulator to place air accumulator, sweep upper layer and lower layer
Between gap fork truck can be inserted into, the lower surface of the sweep is equipped with four fixed columns that can stretch downwards, and fixed column is stretched
By motor driven, driving switch is located on sweep, and the bottom surface of fixed column is equipped with cushion, and the outer surface two sides of the air accumulator are logical
It crosses buckle and is connected with telescopic side stand, ground is extended substantially downward to after side stand elongation, the end of side stand is equipped with spring shock absorption
Mechanism, the vehicle frame of cart are connected with handle, and the handle is concertina type handle, and handle is fixed on vehicle frame by positioning pin, stretch
Vehicle frame is equipped with multiple position locations and installs for handle.
Preferably, there are four the idler wheel sets.
Preferably, being equipped with temperature detecting module at the cylinder.
Preferably, the temperature detecting module includes temperature sensor, wireless signal transmission and temperature display dress
It sets, temperature sensor connects wireless signal transmission, and the data that wireless signal transmission measures temperature sensor are sent
To temperature indicating device.
What the present invention designed has the air compressor machine of decrease of noise functions, and air accumulator is specifically located on the sweep of cart, cart packet
The idler wheel of sweep, the flexible vehicle frame of sweep side and sweep bottom is included, sweep is hollow double-layer structure, after the vehicle frame that stretches is pressed on earth
Fork truck can be used to look into the direct mobile compressor of sweep, the middle position on upper layer is fixedly connected with a semi-circular bracket, the semicircle
Shape bracket adapts to the shape of air accumulator to place air accumulator, and the gap fork truck between sweep upper layer and lower layer can be inserted into, described
The lower surface of sweep is equipped with four fixed columns that can be stretched downwards, and the flexible of fixed column passes through motor driven, and driving switch is located at
On sweep, the bottom surface of fixed column is equipped with cushion, and the outer surface two sides of the air accumulator are connected with telescopic side stand by buckle,
Ground is extended substantially downward to after side stand elongation, the end of side stand is equipped with spring shock absorption mechanism, the bottom cushion of fixed column and side
The spring shock absorption mechanism of stent ends plays the role of damping jointly, and the vehicle frame of cart is connected with handle, and the handle is concertina type
Handle, handle are fixed on vehicle frame by positioning pin, and the vehicle frame that stretches is equipped with multiple position locations and installs for handle, the present invention
The active noise reducing device used to the installation site of microphone also without particular/special requirement, microphone and loudspeaker flexible arrangement, and passes
The installation denoising device of system needs to be adapted to by many factors such as blimp model, pipe shapes, erroneous for installation, in contrast
The present invention does not limit to noise reduction horn and number of microphone and installation site, and equipment is easy for installation, and when maintenance also only need to individually be unloaded
Noise reduction box and microphone, plant maintenance is no longer cumbersome, reduces maintenance cost, and maintenance replacement is high-efficient, at low cost, and flexible
Microphone cloth position, can comprehensive acquisition noise, it is applied widely, nearly all blimp model is applicable to, in addition, of the invention
Central data processor load denoising device selftest module, selftest module receive and process device report own system signal
Determine whether there is the increase of microphone and noise reduction horn, after detecting that the number of microphone and noise reduction horn generates variation, from
Inspection module can calculate new control errors function i.e. controller parameter and be loaded into central data processor, while in selftest module
Equipped with timing detection module, microphone and noise reduction horn its own parameter that works long hours under the processing environment of factory can occur
Variation, timing detection module will be updated the evaluation condition and equation of device at regular intervals, that is, be directed to microphone and noise reduction loudspeaker
The variation of inherent parameters calculates new controller parameter and is loaded into central data processor, and the present invention only needs periodically to start inspection
Module is surveyed, because microphone and noise reduction horn generate after being lost, its own Parameters variation need to only do a test in again at this time
Data processing module is entreated to load a new controller parameter, because new controller parameter is according to newest microphone
Best parameter, reduces maintenance times, improves service life with the calculated noise reduction effect of noise reduction horn performance.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the schematic diagram of active noise reducing device.
In figure: 1, cart；2, air accumulator；3, blimp；4, cooling pipe；5, cylinder；6, cooling fin；7, sweep；8, it stretches
Contracting vehicle frame；9, idler wheel；10, semi-circular bracket；11, fixed column；12, cushion；13, side stand；14, spring shock absorption bracket；15,
Hand；16, microphone；17, noise reduction box；18, noise reduction horn；19, central data processor；20, selftest module；21, timing
Detection module.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and for explaining only the invention, and is not considered as limiting the invention.
In the description of the present invention, unless otherwise specified and limited, it should be noted that term " installation ", " connected ",
" connection " shall be understood in a broad sense, for example, it may be mechanical connection or electrical connection, the connection being also possible to inside two elements can
It, can also be indirectly connected through an intermediary to be to be connected directly.It for the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of above-mentioned term.
A kind of air compressor machine for having decrease of noise functions according to an embodiment of the present invention, the packet are described referring to Fig. 1 and Fig. 2
It includes the air accumulator 2 being arranged on cart 1, is equipped with blimp 3 above air accumulator 2, the hinged air accumulator 2 of 3 bottom end of blimp, separately
Air accumulator 2 is lockked by buckling in one end, and 3 two sidewalls of blimp are equipped with cooling pipe 4, is equipped with cylinder 5 and active in blimp 2
Denoising device, the active noise reducing device include incoming device, central data processor 19 and noise reduction unit, are passed to device packet
Microphone 16 is included, microphone 16 is arbitrarily installed at the one of blimp 3, and noise reduction unit includes at least two noise reduction boxes 17, institute
The bottom that noise reduction box 17 is located at blimp 3 is stated, face air accumulator 2, noise reduction box 17 is interior to be equipped at least one noise reduction horn 18
And there are the space of installation microphone 16, the microphone 16 and noise reduction horn 18 are connect with central data processor 19, institute
It states central data processor 19 to be mounted in a noise reduction box 17 of noise reduction unit, central data processor 19 loads noise reduction dress
Selftest module 20 is set, selftest module 20 receives and processes the own system signal of device report to determine whether there is 16 He of microphone
The increase of noise reduction horn 18, while timing detection module 21 is equipped in selftest module 20, the central data processor 19 is installed
In a noise reduction box 17 of noise reduction unit, while the inner sidewall of blimp 3 is equipped with several cooling fins 6, and air accumulator 2 is specific
It is arranged on the sweep 7 of cart 1, cart 1 includes the idler wheel 9 of 7 bottom of sweep 7, the flexible vehicle frame 8 of 7 side of sweep and sweep, vehicle
Plate 7 is hollow double-layer structure, and the middle position on upper layer is fixedly connected with a semi-circular bracket 10, which adapts to gas storage
The shape of tank 2 is to place air accumulator 2, and the gap fork truck between 7 upper layer of sweep and lower layer can be inserted into, the following table of the sweep 7
Face is equipped with four fixed columns 11 that can be stretched downwards, and the flexible of fixed column 11 passes through motor driven, and driving switch is located at sweep 7
On, the bottom surface of fixed column 11 is equipped with cushion 12, and the outer surface two sides of the air accumulator 2 are connected with telescopic side stand by buckle
13, ground is extended substantially downward to after the side stand 13 elongation, the end of side stand 13 is equipped with spring shock absorption mechanism 14, the vehicle frame 8 of cart 1
It is connected with handle 15, the handle 15 is concertina type handle, and handle 15 is fixed on carriage 8 by positioning pin, sets on flexible vehicle frame 8
There are multiple position locations to install for handle 15.
Preferably, there are four the idler wheel 9 sets.
Preferably, being equipped with temperature detecting module at the cylinder 5.
Preferably, the temperature detecting module includes temperature sensor, wireless signal transmission and temperature display dress
It sets, temperature sensor connects wireless signal transmission, and the data that wireless signal transmission measures temperature sensor are sent
To temperature indicating device.
What the present invention designed has the air compressor machine of decrease of noise functions, and air accumulator is specifically located on the sweep of cart, cart packet
The idler wheel of sweep, the flexible vehicle frame of sweep side and sweep bottom is included, sweep is hollow double-layer structure, after the vehicle frame that stretches is pressed on earth
Fork truck can be used to look into the direct mobile compressor of sweep, the middle position on upper layer is fixedly connected with a semi-circular bracket, the semicircle
Shape bracket adapts to the shape of air accumulator to place air accumulator, and the gap fork truck between sweep upper layer and lower layer can be inserted into, described
The lower surface of sweep is equipped with four fixed columns that can be stretched downwards, and the flexible of fixed column passes through motor driven, and driving switch is located at
On sweep, the bottom surface of fixed column is equipped with cushion, and the outer surface two sides of the air accumulator are connected with telescopic side stand by buckle,
Ground is extended substantially downward to after side stand elongation, the end of side stand is equipped with spring shock absorption mechanism, the bottom cushion of fixed column and side
The spring shock absorption mechanism of stent ends plays the role of damping jointly, and the vehicle frame of cart is connected with handle, and the handle is concertina type
Handle, handle are fixed on vehicle frame by positioning pin, and the vehicle frame that stretches is equipped with multiple position locations and installs for handle, the present invention
The active noise reducing device used to the installation site of microphone also without particular/special requirement, microphone and loudspeaker flexible arrangement, and passes
The installation denoising device of system needs to be adapted to by many factors such as blimp model, pipe shapes, erroneous for installation, in contrast
The present invention does not limit to noise reduction horn and number of microphone and installation site, and equipment is easy for installation, and when maintenance also only need to individually be unloaded
Noise reduction box and microphone, plant maintenance is no longer cumbersome, reduces maintenance cost, and maintenance replacement is high-efficient, at low cost, and flexible
Microphone cloth position, can comprehensive acquisition noise, it is applied widely, nearly all blimp model is applicable to, in addition, of the invention
Central data processor load denoising device selftest module, selftest module receive and process device report own system signal
Determine whether there is the increase of microphone and noise reduction horn, after detecting that the number of microphone and noise reduction horn generates variation, from
Inspection module can calculate new control errors function i.e. controller parameter and be loaded into central data processor, while in selftest module
Equipped with timing detection module, microphone and noise reduction horn its own parameter that works long hours under the processing environment of factory can occur
Variation, timing detection module will be updated the evaluation condition and equation of device at regular intervals, that is, be directed to microphone and noise reduction loudspeaker
The variation of inherent parameters calculates new controller parameter and is loaded into central data processor, and the present invention only needs periodically to start inspection
Module is surveyed, because microphone and noise reduction horn generate after being lost, its own Parameters variation need to only do a test in again at this time
Data processing module is entreated to load a new controller parameter, because new controller parameter is according to newest microphone
Best parameter, reduces maintenance times, improves service life with the calculated noise reduction effect of noise reduction horn performance.
In the description of this specification, the description meaning of reference term " one embodiment ", " example " or " some examples " etc.
Refer to that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one reality of the invention
It applies in example or example.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment or show
Example.Moreover, particular features, structures, materials, or characteristics described can be in any one or more of the embodiments or examples
It can be combined in any suitable manner.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: not
A variety of change, modification, replacement and modification can be carried out to these embodiments in the case where being detached from the principle of the present invention and objective, this
The range of invention is defined by the claims and their equivalents.
Claims (4)
1. a kind of air compressor machine for having decrease of noise functions, which is characterized in that the air accumulator including being arranged on cart, air accumulator
Top is equipped with blimp, the hinged air accumulator of blimp bottom end, and the other end locks air accumulator, blimp two sidewalls by buckle
Be equipped with cooling pipe, be equipped with cylinder and active noise reducing device in blimp, the active noise reducing device include incoming device,
Central data processor and noise reduction unit, incoming device include microphone, and microphone is arbitrarily installed at the one of blimp, noise reduction
Unit includes at least two noise reduction boxes, and the noise reduction box is located at the bottom of blimp, face air accumulator, is set in noise reduction box
There is at least one noise reduction horn and there are the space of installation microphone, the microphone and noise reduction horns to handle with central data
Device connection, the central data processor are mounted in a noise reduction box of noise reduction unit, central data processor load drop
It makes an uproar self-check of device module, selftest module receives and processes the own system signal of device report to determine whether there is microphone and drop
It makes an uproar the increases of loudspeaker, while being equipped with timing detection module in selftest module, the central data processor is mounted on noise reduction unit
A noise reduction box in, while the inner sidewall of blimp is equipped with several cooling fins, and air accumulator is specifically located at the vehicle of cart
On plate, cart includes the idler wheel of sweep, the flexible vehicle frame of sweep side and sweep bottom, and sweep is hollow double-layer structure, upper layer
Middle position be fixedly connected with a semi-circular bracket, the semi-circular bracket adapt to air accumulator shape to place air accumulator, vehicle
Gap fork truck between plate upper layer and lower layer can be inserted into, and the lower surface of the sweep is equipped with four fixed columns that can be stretched downwards,
The flexible of fixed column passes through motor driven, and driving switch is located on sweep, and the bottom surface of fixed column is equipped with cushion, the air accumulator
Outer surface two sides are connected with telescopic side stand by buckle, extend substantially downward to ground, the end of side stand after side stand elongation
Equipped with spring shock absorption mechanism, the vehicle frame of cart is connected with handle, and the handle is concertina type handle, and handle is fixed on by positioning pin
On vehicle frame, the vehicle frame that stretches is equipped with multiple position locations and installs for handle.
2. air compressor machine according to claim 1, which is characterized in that there are four the idler wheel is set.
3. air compressor machine according to claim 2, which is characterized in that be equipped with temperature detecting module at the cylinder.
4. air compressor machine according to claim 1, which is characterized in that the temperature detecting module includes temperature sensor, nothing
Line signal transmitting apparatus and temperature indicating device, temperature sensor connect wireless signal transmission, wireless signal transmission
The data that temperature sensor is measured are sent to temperature indicating device.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811484094.9A CN109854487A (en) | 2018-12-06 | 2018-12-06 | A kind of air compressor machine having decrease of noise functions |
| JP2021600012U JP3231328U (en) | 2018-12-06 | 2019-08-15 | Air compressor with noise reduction function |
| PCT/CN2019/100769 WO2020113993A1 (en) | 2018-12-06 | 2019-08-15 | Air compressor equipped with noise reduction function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811484094.9A CN109854487A (en) | 2018-12-06 | 2018-12-06 | A kind of air compressor machine having decrease of noise functions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109854487A true CN109854487A (en) | 2019-06-07 |
Family
ID=66890601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811484094.9A Pending CN109854487A (en) | 2018-12-06 | 2018-12-06 | A kind of air compressor machine having decrease of noise functions |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3231328U (en) |
| CN (1) | CN109854487A (en) |
| WO (1) | WO2020113993A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020107947A1 (en) * | 2018-11-28 | 2020-06-04 | 太仓市明龙机械有限公司 | Novel air compressor |
| WO2020107946A1 (en) * | 2018-11-28 | 2020-06-04 | 太仓仕茂传动机械有限公司 | Air compressor having damping function |
| WO2020113992A1 (en) * | 2018-12-06 | 2020-06-11 | 太仓市明龙机械有限公司 | Air-cooled air compressor having noise reduction function |
| WO2020113993A1 (en) * | 2018-12-06 | 2020-06-11 | 太仓凯盟精密模具有限公司 | Air compressor equipped with noise reduction function |
| CN112128087A (en) * | 2020-09-07 | 2020-12-25 | 台州沃乐农泵业有限公司 | High-efficient safe air compressor machine and filter equipment thereof |
| CN113153729A (en) * | 2021-04-12 | 2021-07-23 | 徐州新大隆化工泵业制造有限公司 | Noise reduction method and noise reduction device of plunger pump |
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| WO2020107947A1 (en) * | 2018-11-28 | 2020-06-04 | 太仓市明龙机械有限公司 | Novel air compressor |
| WO2020107946A1 (en) * | 2018-11-28 | 2020-06-04 | 太仓仕茂传动机械有限公司 | Air compressor having damping function |
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