CN110469487A - A kind of silencing apparatus for admission line having both return valve function - Google Patents
A kind of silencing apparatus for admission line having both return valve function Download PDFInfo
- Publication number
- CN110469487A CN110469487A CN201910835844.0A CN201910835844A CN110469487A CN 110469487 A CN110469487 A CN 110469487A CN 201910835844 A CN201910835844 A CN 201910835844A CN 110469487 A CN110469487 A CN 110469487A
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- China
- Prior art keywords
- silencing apparatus
- noise elimination
- diameter
- piston
- main body
- 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
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- 230000030279 gene silencing Effects 0.000 title claims abstract description 68
- 230000008030 elimination Effects 0.000 claims abstract description 72
- 238000003379 elimination reaction Methods 0.000 claims abstract description 72
- 230000003014 reinforcing effect Effects 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 206010022000 influenza Diseases 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 6
- 230000009467 reduction Effects 0.000 description 6
- 238000009434 installation Methods 0.000 description 4
- 230000003139 buffering effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 206010041235 Snoring Diseases 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
Classifications
-
- 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
- F04B39/0083—Pulsation and noise damping means using blow off silencers
-
- 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
- F04B39/10—Adaptations or arrangements of distribution members
- F04B39/1013—Adaptations or arrangements of distribution members the members being of the poppet valve type
Abstract
The invention discloses a kind of silencing apparatus for admission line for having both return valve function, including silencing apparatus main body (1) and noise elimination piston (2)；Inlet channel (11) are equipped in silencing apparatus main body, noise elimination piston is horn-like structure, and the internal diameter of inlet channel is between the small-caliber end diameter and large diameter end diameter of noise elimination piston；Silencing apparatus main body is equipped with diversion port (13), diversion port internal diameter is greater than noise elimination piston large diameter end diameter, diversion port is equipped with limit and closes up (14), it limits closing in internal diameter and is less than noise elimination piston large diameter end diameter, make the large diameter end of noise elimination piston be placed in limit to close up between inlet channel, the small-caliber end of noise elimination piston is inserted in the intake channel；Deceleration air flue is formed between the outer wall and diversion port of noise elimination piston and the inner wall of inlet channel.The present invention can be directly installed on the air inlet of the pump housing, reach preferable shunting, decelerating effect, the noise of air inlet can be greatly reduced, and then reduce the noise of entire air pump device.
Description
Technical field
The present invention relates to a kind of silencing apparatus more particularly to a kind of noise eliminations for admission line for having both return valve function
Device.
Background technique
Currently, the pump housings such as Mini-type spiral air pump, diaphragm pump are widely used in many products on the market, as massage armchair,
Massaging device, sphygmomanometer, Easy pillow, snore relieving pad, air mattress etc..Wherein, the basic functional principle of micro air pump is by motor
Air pump crankshaft is driven inevitably to generate certain noise during inflating so that piston be driven to be inflated.Currently, existing skill
The air pump noise of art is generally higher than 55dB, its noise is very big for opposite indoor environment, the main source of micro air pump noise
Including motor noise itself, air pump crankshaft and motor shaft contact spot noise, air pump piston friction of motion and airborne noise；Diaphragm pump
Similarly in this way, the noise that pump housing operation generates greatly reduces the usage experience of product.
Currently, the noise reduction for the pump housing mainly has the modes such as vibration isolation, sound-absorbing, in gas outlet plus gas receiver etc., but effect is all
It is undesirable, a part of noise therein can only be solved, and the noise of air inlet is still very big.
Summary of the invention
The purpose of the present invention is to provide a kind of silencing apparatus for admission line for having both return valve function, can be directly
It is mounted on the air inlet of the pump housing, reaches preferable shunting, decelerating effect, the noise of air inlet can be greatly reduced, and then reduce whole
The noise of a air pump device.
The present invention is implemented as follows:
A kind of silencing apparatus for admission line having both return valve function, including silencing apparatus main body and work of eliminating the noise
Plug；The inlet channel axially through silencing apparatus main body is equipped in silencing apparatus main body, noise elimination piston is that one end diameter is small, another
The big horn-like structure of one end diameter, and the internal diameter of inlet channel is straight between the small-caliber end diameter and large diameter end of noise elimination piston
Between diameter；The end of silencing apparatus main body is equipped with diversion port, and the internal diameter of diversion port is greater than the large diameter end of noise elimination piston
Diameter, diversion port are equipped with limit and close up, and the internal diameter for limiting closing in is less than the large diameter end diameter of noise elimination piston, make to eliminate the noise and live
The large diameter end of plug is placed in limit and closes up between inlet channel, and the small-caliber end insertion of noise elimination piston is in the intake channel；Disappear
Deceleration air flue is formed between the outer wall and diversion port of sound piston and the inner wall of inlet channel.
The large diameter end of the noise elimination piston can be in the diversion port that limit is closed up between inlet channel with air-flow
It is moved forward and backward.
The inner wall that the outer wall of the noise elimination piston can close up with limit forms point-like contacts, if deceleration air flue is separated into
Dry item shunts air flue.
Baffle is equipped at the outer end edges of the silencing apparatus main body, silencing apparatus main body is inserted in air inlet pipe and leads to
The end for crossing baffle and air inlet pipe connects.
The outer diameter of the baffle is between the bore of air inlet pipe and the pipe outside diameter of air inlet pipe.
The outer wall of the silencing apparatus main body is equipped with a circle or several circles reinforce flange, and the outer diameter for reinforcing flange is bigger
In the bore of air inlet pipe.
There are gaps between reinforcing flange described in two adjacent rings.
The present invention also provides a kind of production methods of silencing apparatus for admission line for having both return valve function:
It provides silencing apparatus main body (1), is arranged in Yu Suoshu silencing apparatus main body (1) axially through silencing apparatus main body
(1) inlet channel (11)；
It provides noise elimination piston (2), noise elimination piston (2) is fabricated to the horn-like knot that one end diameter is small, other end diameter is big
Structure, and by the internal diameter of inlet channel (11) be fabricated between noise elimination piston (2) small-caliber end diameter and large diameter end diameter it
Between；
Diversion port (13) are set in the end of silencing apparatus main body (1), the internal diameter of diversion port (13) is fabricated to greatly
In the large diameter end diameter of noise elimination piston (2)；
It closes up (14) in setting limit on diversion port (13), the internal diameter of limit closing in (14) is made smaller than noise elimination and is lived
The large diameter end diameter for filling in (2), by the large diameter end of noise elimination piston (2) be placed in limit close up (14) and inlet channel (11) it
Between, and the small-caliber end of noise elimination piston (2) is inserted in inlet channel (11), thus in noise elimination piston (2) outer wall with point
Deceleration air flue is formed between flow port (13) and the inner wall of inlet channel (11).
The large diameter end of the noise elimination piston (2) is fabricated to close up (14) between inlet channel (11) in limit
Diversion port (13) in be moved forward and backward with air-flow.
The outer wall of the noise elimination piston (2) can form point-like contacts with the inner wall of limit closing in (14), by the air flue that slows down
It is separated into several shunting air flues (15).
Compared with prior art, the present invention having the following beneficial effects:
1, track and rate of the present invention by the change hollow flow of air of air inlet pipe, plays preferable buffering, shunting function,
Effectively it can inhibit and improve the noise of air pump at work, not influence the working efficiency of product, while check-valves can be also served as to make
With.
2, the present invention is small in size, occupies little space, convenient for disassembly and assembly, does not influence the use and beauty of product air inlet pipe.
3, the present invention has many advantages, such as that versatile, long service life, structure are simple, at low cost.
Detailed description of the invention
Fig. 1 is the cross-sectional view for the silencing apparatus for admission line that the present invention has both return valve function；
Fig. 2 is the side view for the silencing apparatus for admission line that the present invention has both return valve function；
Fig. 3 is the scheme of installation for the silencing apparatus for admission line that the present invention has both return valve function.
In figure, 1 silencing apparatus main body, 11 inlet channels, 13 diversion ports, 14 limit closing ins, 15 shunt air flues, 16 gears
Piece, 17 reinforce flange, 2 noise elimination pistons, 3 air inlet pipe.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings and specific examples.
Refer to attached drawing 1, a kind of silencing apparatus for admission line having both return valve function, including silencing apparatus master
Body 1 and noise elimination piston 2；It is equipped with the inlet channel 11 axially through silencing apparatus main body 1 in silencing apparatus main body 1, eliminates the noise and lives
Plug 2 is the horn-like structure of gradual change that one end diameter is small, other end diameter is big, and the internal diameter of inlet channel 11 is between noise elimination piston 2
Small-caliber end diameter and large diameter end diameter between；The end of silencing apparatus main body 1 is equipped with diversion port 13, and diversion port
13 internal diameter is slightly larger than the large diameter end diameter of noise elimination piston 2, and diversion port 13, which is equipped with, limits closing in 14, limit closing in 14
Internal diameter is less than the large diameter end diameter of noise elimination piston 2, and the large diameter end of noise elimination piston 2 is made to be placed in limit closing in 14 and inlet channel
Between 11, the small-caliber end of noise elimination piston 2 is inserted in inlet channel 11；The outer wall of noise elimination piston 2 and diversion port 13 and into
Deceleration air flue is formed between the inner wall in gas channel 11, air enters inlet channel 11 and enters pump housing etc. after the deceleration of deceleration air flue
Device.
The large diameter end of the noise elimination piston 2 can be in the diversion port 13 that limit is closed up between 14 and inlet channel 11
It is moved forward and backward with air-flow, when air-flow is big, deceleration airway open is big, and air-flow hour, deceleration airway open is small, can also be according to air inlet gas
Flow automatically adjusts air-flow bore, realizes best noise reduction effect, while in flow reversal, noise elimination piston 2 is pushed away by air-flow
It moves and is in close contact with the end of inlet channel 11, since the internal diameter of inlet channel 11 is straight between the small-caliber end of noise elimination piston 2
Between diameter and large diameter end diameter, the end of inlet channel 11 is blocked completely and is played the work of check-valves by noise elimination piston 2 at this time
With.
Attached drawing 2 is referred to, the outer wall of the noise elimination piston 2 can form point-like contacts with the inner wall of limit closing in 14, will
Deceleration air flue is separated into several shunting air flues 15, can play the role of further slowing down in air inlet, shunt, noise reduction.
Attached drawing 3 is referred to, baffle 16 is equipped at the outer end edges of the silencing apparatus main body 1, silencing apparatus main body 1 is inserted
Enter in air inlet pipe 3 and connect by baffle 16 with the end part seal of air inlet pipe 3, plug is convenient.
The outer diameter of the baffle 16 can prevent from disappearing between the bore of air inlet pipe 3 and the pipe outside diameter of air inlet pipe 3
1 entirety of acoustic device main body is caught in air inlet pipe 3 and can not take out, and does not influence installation and the good appearance of 3 end of air inlet pipe.
The outer wall of the silencing apparatus main body 1 is equipped with a circle or several circles reinforce flange 17, reinforces the outer of flange 17
Diameter is slightly larger than the bore of air inlet pipe 3, by reinforcing the contact squeeze of flange 17 and 3 inner wall of air inlet pipe, makes silencing apparatus main body 1
Stable is placed in air inlet pipe 3.
There are gaps between reinforcing flange 17 described in two adjacent rings, to reinforce the space that flange 17 reserves extrusion deformation.
Preferably, the silencing apparatus main body 1 is that rigid material (such as plastics, aluminium alloy) is made, and intensity is high, durable
Property is preferable.
Preferably, the noise elimination piston 2 is that elastic material (such as silica gel, rubber) is made, and friction noise is small, durability
Preferably, long service life.
The present invention is directly installed in the air inlet pipe 3 of the devices such as the pump housing, and the shape of silencing apparatus main body 1 can be with required installation
Air inlet pipe 3 structure it is similar, convenient for matching grafting.By changing the intake method of air inlet pipe 3, make track and the rate of air inlet
It changes, silencing apparatus main body 1 plays the role of buffering as intermediate air storage chamber, achievees the purpose that noise reduction.
When gas enters inlet channel 11, by noise elimination piston 2 to being pushed forward, make outer wall and the limit closing in 14 of its large diameter end
Inner wall point-like contacts and form a plurality of shunting air flue 15 so that air-flow generates turbulent flow and enters pump housing etc. by shunting air flue 15
In device, several tiny air-flows interfere and have offseted partial noise, and inlet noise is greatly lowered, and then reduce
The noise of entire air pump device, when use the noise of entire air pump device reduce at least 5dB.
It, can be by the large diameter end of noise elimination piston 2 and limit closing in 14 according to the pipe diameter size of the requirement of noise elimination and air inlet pipe 3
It is designed to different structures, it is made to form the point-like contacts position of different number, such as rectangular limit between limit closing in 14
Close up 14 and circular noise elimination piston 2 large diameter end and between can form 4 point-like contacts positions, thus formed 4 shunting
Air flue 15 supplies stream and passes through.
The present invention also provides a kind of production methods of silencing apparatus for admission line for having both return valve function:
Refer to attached drawing 1, a kind of production method for the silencing apparatus for admission line having both return valve function, including
Following steps: silencing apparatus main body 1 is provided, is arranged in Yu Suoshu silencing apparatus main body 1 axially through silencing apparatus main body 1
Inlet channel 11；
Noise elimination piston 2 is provided, noise elimination piston 2 is fabricated to the horn-like structure that one end diameter is small, other end diameter is big, and
The internal diameter of inlet channel 11 is fabricated between the small-caliber end diameter and large diameter end diameter of noise elimination piston 2；
Diversion port 13 is set in the end of silencing apparatus main body 1, the internal diameter of diversion port 13 is fabricated to be greater than and is eliminated the noise
The large diameter end diameter of piston 2；
In setting limit closing in 14 in diversion port 13, the internal diameter of limit closing in 14 is made smaller than noise elimination piston 2
The large diameter end of noise elimination piston 2 is placed in limit and closed up between 14 and inlet channel 11 by large diameter end diameter, and the piston that will eliminate the noise
2 small-caliber end is inserted in inlet channel 11, thus in the outer wall and diversion port 13 and inlet channel 11 of noise elimination piston 2
Deceleration air flue is formed between inner wall.
The large diameter end of the noise elimination piston 2 is fabricated to the shunting closed up between 14 and inlet channel 11 in limit
It is moved forward and backward in port 13 with air-flow.When air-flow is big, deceleration airway open is big, and air-flow hour, deceleration airway open is small, can also root
Air-flow bore is automatically adjusted according to charge air flow amount, realizes best noise reduction effect, while in flow reversal, noise elimination piston 2
It is pushed and be in close contact with the end of inlet channel 11 by air-flow, since the internal diameter of inlet channel 11 is between the small of noise elimination piston 2
Between bore end diameter and large diameter end diameter, the end of inlet channel 11 is blocked completely and is played only by noise elimination piston 2 at this time
Return the effect of valve.
Attached drawing 2 is referred to, the outer wall of the noise elimination piston 2 can form point-like contacts with the inner wall of limit closing in 14, will
Deceleration air flue is separated into several shunting air flues 15, can play the role of further slowing down in air inlet, shunt, noise reduction.
Attached drawing 3 is referred to, baffle 16 is set at the outer end edges of the silencing apparatus main body 1 of Yu Suoshu, by silencing apparatus master
Body 1 is inserted into air inlet pipe 3 and is connect by baffle 16 with the end part seal of air inlet pipe 3, and plug is convenient.
The outer diameter of the baffle 16 is fabricated between the bore of air inlet pipe 3 and the pipe outside diameter of air inlet pipe 3, both
Silencing apparatus main body 1 can be prevented integrally to be caught in air inlet pipe 3 and can not take out, and do not influence the installation of 3 end of air inlet pipe and outer
Shape is beautiful.
Flange 17 is reinforced in one circle of setting or several circles on the outer wall of the silencing apparatus main body 1, and flange will be reinforced
17 outer diameter is fabricated to the bore greater than air inlet pipe 3, by reinforcing the contact squeeze of flange 17 and 3 inner wall of air inlet pipe, makes to disappear
Acoustic device main body 1 is stable to be placed in air inlet pipe 3.
It when flange 17 is reinforced in production, is stayed between the reinforcing flange 17 described in two adjacent rings and sets gap, to reinforce flange 17
Reserve the space of extrusion deformation.
The above is merely preferred embodiments of the present invention, be not intended to limit the scope of the present invention, therefore, it is all
Any modification, equivalent replacement, improvement and so within the spirit and principles in the present invention should be included in protection model of the invention
Within enclosing.
Claims (10)
1. a kind of silencing apparatus for admission line for having both return valve function, it is characterized in that: including silencing apparatus main body (1)
With noise elimination piston (2)；It is equipped with the inlet channel (11) axially through silencing apparatus main body (1) in silencing apparatus main body (1), disappears
Sound piston (2) is the horn-like structure that one end diameter is small, other end diameter is big, and the internal diameter of inlet channel (11) is lived between eliminating the noise
Between the small-caliber end diameter and large diameter end diameter for filling in (2)；The end of silencing apparatus main body (1) is equipped with diversion port (13),
And the internal diameter of diversion port (13) is greater than the large diameter end diameter of noise elimination piston (2), diversion port (13) is equipped with limit and closes up
(14), the internal diameter of limit closing in (14) is less than the large diameter end diameter of noise elimination piston (2), makes the large diameter end of noise elimination piston (2)
It is placed in limit to close up (14) between inlet channel (11), the small-caliber end of noise elimination piston (2) is inserted in inlet channel (11)；
Deceleration air flue is formed between the outer wall and diversion port (13) and the inner wall of inlet channel (11) of noise elimination piston (2).
2. the silencing apparatus for admission line according to claim 1 for having both return valve function, it is characterized in that: described
Noise elimination piston (2) the diversion port (13) that can close up between (14) and inlet channel (11) in limit of large diameter end it is interior with gas
Stream is moved forward and backward.
3. the silencing apparatus for admission line according to claim 1 or 2 for having both return valve function, it is characterized in that:
The outer wall of the noise elimination piston (2) can form point-like contacts with the inner wall of limit closing in (14), if deceleration air flue is separated into
Dry item shunts air flue (15).
4. the silencing apparatus for admission line according to claim 1 for having both return valve function, it is characterized in that: described
Silencing apparatus main body (1) outer end edges at be equipped with baffle (16), silencing apparatus main body (1) is inserted in air inlet pipe (3) simultaneously
It is connect by baffle (16) with the end of air inlet pipe (3).
5. the silencing apparatus for admission line according to claim 4 for having both return valve function, it is characterized in that: described
Baffle (16) outer diameter between the bore of air inlet pipe (3) and the pipe outside diameter of air inlet pipe (3).
6. the silencing apparatus for admission line according to claim 1 for having both return valve function, it is characterized in that: described
Silencing apparatus main body (1) outer wall be equipped with one circle or several circles reinforce flange (17), reinforcing flange (17) outer diameter be greater than
The bore of air inlet pipe (3).
7. the silencing apparatus for admission line according to claim 6 for having both return valve function, it is characterized in that: adjacent
There are gaps between the two circles reinforcing flange (17).
8. a kind of production method for the silencing apparatus for admission line for having both return valve function, it is characterized in that:
It provides silencing apparatus main body (1), is arranged in Yu Suoshu silencing apparatus main body (1) axially through silencing apparatus main body (1)
Inlet channel (11)；
It provides noise elimination piston (2), noise elimination piston (2) is fabricated to the horn-like structure that one end diameter is small, other end diameter is big, and
The internal diameter of inlet channel (11) is fabricated between the small-caliber end diameter and large diameter end diameter of noise elimination piston (2)；
In silencing apparatus main body (1) end be arranged diversion port (13), by the internal diameter of diversion port (13) be fabricated to be greater than disappear
The large diameter end diameter of sound piston (2)；
It closes up (14) in setting limit on diversion port (13), the internal diameter of limit closing in (14) is made smaller than noise elimination piston
(2) large diameter end of noise elimination piston (2) is placed in limit and closed up (14) between inlet channel (11) by large diameter end diameter,
And the small-caliber end of noise elimination piston (2) is inserted in inlet channel (11), thus outer wall and shunting end in noise elimination piston (2)
Deceleration air flue is formed between mouth (13) and the inner wall of inlet channel (11).
9. the production method of the silencing apparatus for admission line according to claim 8 for having both return valve function,
It is characterized in: the large diameter end of the noise elimination piston (2) is fabricated to close up (14) between inlet channel (11) in limit
Diversion port (13) in be moved forward and backward with air-flow.
10. the production side of the silencing apparatus for admission line for having both return valve function according to claim 8 or claim 9
Method, it is characterized in that: the outer wall of the noise elimination piston (2) can close up with limit, the inner wall of (14) forms point-like contacts, will slow down
Air flue is separated into several shunting air flues (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910835844.0A CN110469487A (en) | 2019-09-05 | 2019-09-05 | A kind of silencing apparatus for admission line having both return valve function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910835844.0A CN110469487A (en) | 2019-09-05 | 2019-09-05 | A kind of silencing apparatus for admission line having both return valve function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110469487A true CN110469487A (en) | 2019-11-19 |
Family
ID=68514849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910835844.0A Pending CN110469487A (en) | 2019-09-05 | 2019-09-05 | A kind of silencing apparatus for admission line having both return valve function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110469487A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0354161A2 (en) * | 1988-08-02 | 1990-02-07 | Carrier Corporation | Muffler/check valve assembly for scroll compressor |
| KR20070054149A (en) * | 2007-04-03 | 2007-05-28 | 민병일 | Low noise cylinder type air compressor having control valve for discharging remaining pressure |
| CN201636011U (en) * | 2010-07-09 | 2010-11-17 | 厦门科际精密器材有限公司 | Air pump muffler with improved structure |
| CN205423966U (en) * | 2016-03-25 | 2016-08-03 | 四川长虹技佳精工有限公司 | A negative pressure air supplement unit for beverage equipment |
| CN210686223U (en) * | 2019-09-05 | 2020-06-05 | 安徽久工健业有限责任公司 | Tubular silencer |
-
2019
- 2019-09-05 CN CN201910835844.0A patent/CN110469487A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0354161A2 (en) * | 1988-08-02 | 1990-02-07 | Carrier Corporation | Muffler/check valve assembly for scroll compressor |
| KR20070054149A (en) * | 2007-04-03 | 2007-05-28 | 민병일 | Low noise cylinder type air compressor having control valve for discharging remaining pressure |
| CN201636011U (en) * | 2010-07-09 | 2010-11-17 | 厦门科际精密器材有限公司 | Air pump muffler with improved structure |
| CN205423966U (en) * | 2016-03-25 | 2016-08-03 | 四川长虹技佳精工有限公司 | A negative pressure air supplement unit for beverage equipment |
| CN210686223U (en) * | 2019-09-05 | 2020-06-05 | 安徽久工健业有限责任公司 | Tubular silencer |
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