GB2356023A - Noise suppression of an air pump - Google Patents

Noise suppression of an air pump Download PDF

Info

Publication number
GB2356023A
GB2356023A GB9925965A GB9925965A GB2356023A GB 2356023 A GB2356023 A GB 2356023A GB 9925965 A GB9925965 A GB 9925965A GB 9925965 A GB9925965 A GB 9925965A GB 2356023 A GB2356023 A GB 2356023A
Authority
GB
United Kingdom
Prior art keywords
air
noise suppression
chamber
hole
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.)
Withdrawn
Application number
GB9925965A
Other versions
GB9925965D0 (en
Inventor
Chiao-Ming Wang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Meiko Pet Corp
Original Assignee
Meiko Pet Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Meiko Pet Corp filed Critical Meiko Pet Corp
Priority to GB9925965A priority Critical patent/GB2356023A/en
Priority to DE29919931U priority patent/DE29919931U1/en
Publication of GB9925965D0 publication Critical patent/GB9925965D0/en
Publication of GB2356023A publication Critical patent/GB2356023A/en
Application status is Withdrawn legal-status Critical

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B45/00Pumps or pumping installations having flexible working members and specially adapted for elastic fluids
    • F04B45/04Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having plate-like flexible members, e.g. diaphragms
    • F04B45/047Pumps having electric drive
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00Component parts, details, or accessories, of pumps or pumping systems, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0027Pulsation and noise damping means
    • F04B39/0055Pulsation and noise damping means with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes

Abstract

An air pump 20, such as for an aquarium, comprises a body 21 having an inlet chamber 211 and an outlet chamber 212 leading, via one-way valves 24, to a compression chamber 253,254 of a compressing cup 22, or diaphragm, which is reciprocated by an electromagnetically driven vibrating crank 23. A noise suppression device 31,32 is attached to the pump body 21, and comprises an additional air inlet chamber 325 and an additional air outlet chamber 326 which lead to and from the inlet and outlet chambers 211,212, respectively, in the body. Within each additional chamber 325,326 are baffles in the form of air separation plates 323 forming air gaps 324, which define an air flow path through the chambers 325,326. The noise suppression device 31,32 effectively increases the travel path of suction air and delivery air to and from the pump 20 so as to decrease the velocity, and hence the noise created, by air flowing through the pump. An air drain pipe 35 leads from the additional outlet chamber 326 in the noise suppression device.

Description

2356023 1 MOISE SUPPRESSION STRUCTURE FOR AIR PUW

2 BACKGROUND OF THE EX=10

3 FIELD OF ME INVENTI

4 The present invention relates to a noise suppression structure, and more particularly to a noise suppression structure for an air pump that is used in an 6 aquarium.

7 DESCRIPTION OF THE RELAIED PRIOR ART

8 A conventional air pump 10 for an aquarium shown in Fig. I comprises a 9 body I I including an air inlet chamber.111 having an air inlet hole 113 forming a receiving recess 115, an air outlet chamber 112 having an air outlet hole 114 forming 11 a receiving recess 115, an air suction hole 116 defined in the body 11, an air drain 12 pipe 117 attached to the body 11, a bottom cap 15 attached to the body 11, a 13 compressing cup 12 mounted on the body 11, a vibrating crank 13 mounted on the 14 compressing cup 12, a magnet 131 mounted on one end of the vibrating crank 13, two anti-reverse structures 14 each received in the receiving recess 115 and each 16 including an anti-reverse diaphragm 142 releasably encompassing the air inlet hole 17 113 and the air outlet hole 114, and a press block 141 pressing the anti-reverse is diaphragm 142.

19 In operation, when the air pump 10 is energized, the magnet 131 is attracted or repelled by means of an electromagnetic device (not shown), thereby forcing the 21 vibrating crank 13 to vibrate so that the compressing cup 12 can be pressed to move 22 toward the body 11, and can be expanded to move opposite to the body 11. When the 23 compressing cup 12 is expanded. to move opposite to the body 11, the surrounding air 24 Js drawn into the air inlet chamber III through the air suction hole 116 and the air inlet hole 113. The anti-reverse diaphragm 142 is used to prevent the air from flowing 6 back. When the compressing cup 12 is pressed to move toward the body 11, the air is :17 forced to flow through the air outlet hole 114 into the air outlet chamber 112, and is 28 finally carried to surroundings through the air drain pipe 117. However, the travel 1 path of the flowing air is very short, and the flowing air has a great velocity so that 2 the flowing air easily create noise in the air pump 10.

3 SUMMARY OF THE OWN-TI

4 The primary objective of the present invention is to provide a noise suppression structure for an air pump comprising a body including an air inlet space 6 having a first air inlet hole, and an air outlet space having a first air outlet hole, a base 7 attached to the body and including a second air inlet hole connecting to the air inlet 8 space and forming a first receiving recess, and a second air outlet hole connecting to 9 the air outlet space and forming a second receiving recess, a compressing cup mounted on the base, a vibrating crank mounted on the compressing cup, a magnet 11 mounted on one end of the vibrating crank, two anti-reverse structures each received 12 in the first receiving recess and the second receiving recess, and each including an 13 anti-reverse diaphragm releasably encompassing the second air inlet hole and the 14 second air outlet hole, and a press block pressing the anti-reverse diaphragm.

The improvement is in that the noise suppression structure further 16 comprises a noise suppression device attached to the body, wherein the noise 17 suppression device comprises at least one air inlet chamber defining an air suction 18 hole, and a third air inlet hole connecting to the first air inlet hole, at least one air 19 guiding chamber defining a third air outlet hole connecting to the first air outlet hole, and at least one air drain pipe connecting to the air guiding chamber.

21 Further objectives and advantages of the present invention will become 22 apparent after a complete reading of the detailed description with reference to the

23 accompanying drawings.

24 BREEE DESCRIPTION OF THE DRAWINGS

Fig. I is an exploded view of a conventional air pump according to the ).6 prior art;

27 Fig. 2 is an exploded view of a noise suppression structure for an air pump 23 according to the present invention; 2 1 Fig. 3 is a perspective assembly view of the noise suppression structure as 2 shown in Fig. 2; 3 Fig. 4 is a front plan cross-sectional view of the noise suppression structure 4 as shown in Fig. 3; Fig. 5 is a bottom plan cross-sectional view of the noise suppression 6 structure as shown in Fig. 3; 7 Fig. 6 is a perspective view of a noise suppression structure for an air pump 8 according to another embodiment of the present invention; 9 Fig. 7 is a top plan view of the noise suppression structure as shown in Fig.

io 6; 11 Fig. 8 is a front plan cross-sectional view of the noise suppression structure 12 as shown in Fig. 6; and 13 Fig. 9 is a bottom plan cross-sectional view of the noise suppression 14 structure as shown in Fig. 6.

DETAMED DESCRIPTION OF THE PREMRM EMBODDRINTS

16 With reference to Figs. 2-5, a noise suppression structure according to the 17 pres&nt invention is used for an air pump 20 comprising a body 21 including an air 18 inlet space 211 having a first air inlet hole 213, and an air outlet space 212 having a 19 first air outlet hole 214, a base 25 attached to the body 21 and including a second air inlet hole 251 connecting to the air inlet space 211 and forming a first receiving 21 recess 253, and a second air outlet hole 252 connecting to the -air outlet space 212 and 22 forming a second receiving recess 254, a washer 215 mounted between the body 21 23 and the base 25, a compressing cup 22 mounted on the base 25, a vibrating crank 23 24 mounted on the compressing cup 22, a magnet 231 mounted on one end of the vibrating crank 23, two anti-reverse structures 24 each received in the first receiving -4c, recess 253 and the second receiving recess 254, and each including an anti-reverse 27 diaphragm 242 releasably encompassing the second air inlet hole 251 and the second 28 air outlet hole 252, and a press block 241 pressing the anti-reverse diaphragm 242.

3 I The noise suppression structure ftirther comprises a noise suppression 2 device 30 attached to the body 21. The noise suppression device 30 comprises an end 3 cap 31 attached to the body 21 and having a concave surface 311 defining an air 4 suction hole 316, a third air inlet hole 317 connecting to the first air inlet hole 213, and a third air outlet hole 318 connecting to the first air outlet hole 214, and a cas' g 6 32 mounted on the end cap 31 and defining a receiving depression 321 for receiving 7 the end cap 3 1. The noise suppression device 30 also comprises a locking bolt 328 8 extending through a through hole 319 defined in the end cap 3 1, and screwed into a 9 positioning base 327 of the casing 32, thereby securing the end cap 31 to the casing io 32.

11 A first connecting pipe 33 has a first end connecting to the first air inlet 12 hole 213, and a second end connecting to the third air inlet hole 317. A second 13 connecting pipe 34 has a first end connecting to the first air outlet hole 214, and a 14 second end connecting to the third air outlet hole 318. 15 A first baffle 312 is secured in the end cap 3 1,.thereby defining a first room 16 313 connecting to the air suction hole 316 and the third air inlet hole 317, and a 17 second room 314 connecting to the third air outlet hole 318. An air drain pipe 35 is 18 attached to a distal end of the end cap 31 and connects to the second zoom 314. Each 19 of the first zoom 313 and the second zoom 314 includes a first separating plate 315 20 mounted therein. 21 A second baffle 322 is secured in the casing 32, thereby defining an air Wet 22 chamber 325 connecting to the first room 313, and an air guiding chamber 326 23 connecting to the second room 314. Each of the air inlet chamber 325 and the air 24 guiding chamber 326 includes a second separating plate 323 mounted therein and 25. defining an air guiding gap 324 for guiding the air flowing through the air inlet 2:5 chamber 325 and the air guiding chamber 326.

27 In operation, when the air pump 20 is energized, the magnet 231 is attracted 28 or repelled by means of an electromagnetic device (not shown), thereby forcing the 4 I vibrating crank 23 to vibrate so that the compressing cup 22 can be pressed to move 2 toward the base 25, and can be expanded to move opposite to the base 25.

3 When the compressing cup 22 is expanded to move opposite to the base 5, 4 the surrounding air is drawn into the air inlet chamber 325 through the air suction hole 316, and is then circulated in the air inlet chamber 325. The air is then guided 6 through the third air inlet hole 317, the first connecting pipe 33, the first air inlet hole 7 213, the air inlet space 211, and is then carried into the first receiving recess 253 8 through the second air inlet hole 251. The anti-reverse diaphragm 242 is used to 9 prevent the air from flowing back.

When the compressing cup 22 is pressed to move toward the base 25, the ii air is forced to flow through the second receiving recess 254, the second air outlet 12 hole 252, the air outlet space 212, the first air outlet hole 214, the second connecting 13 pipe 34, the third air outlet hole 318, and is then drawn into the air guiding chamber 14 326. The air is then circulated in the air guiding chamber 326, and is finally carried to surroundings through the air drain pipe 35.

16 In such a manner, the air Wet chamber 325 and the air guiding chamber 17 326 of the noise suppression device 30 can be used to increase the travel path of the 18 flowing air so as to decrease the velocity of the flowing air, thereby efficiently 19 reducing noise created by the flowing air passing through the air pump 20.

With now reference to Figs. 6-9, according to another embodiment of the, 21 present invention, the noise suppression device of an air pump 40 comprises an end 22 cap 41, a casing 42, two air inlet chambers, and two mating air guiding chambers, 23 and the noise suppression structure comprises two mating vibrating cranks 43, and 24 two mating compressing cups 44.

Although the present invention has been described with a certain degree of particularity, it is to be understood that the present disclose has been made by way of 77 example only and that many other possible modifications and variations can be made 28 without departing from the scope of the present invention.

I WHAT IS CLABMD IS:

2 1. A noise suppression structure for an air pump comprising:

3 a body (2 1) including an air inlet space (211) having a first air inlet hole 4 (213), and an air outlet space (212) having a first air outlet hole (214); a base (25) attached to said body (21) and including a second air inlet 6 hole (25 1) connecting to said air inlet space (211) and forming a first receiving recess 7 (253), and a second air outlet hole (252) connecting to said air outlet space (212) and 8 forming a second receiving recess (254); 9 a compressing cup (22) mounted on said base (25); a vibrating crank (23) mounted on said compressing cup (22); 11 a magnet (23 1) mounted on one end of said vibrating crank (23); 12 two anti-reverse structures (24) each received in said first receiving 13 recess (253) and said second receiving recess (254), and each including an anti 14 reverse diaphragin (242) releasably encompassing said second air inlet hole (25 1) and said second air outlet hole (252), and a press block (241) pressing said anti-reverse 16 diaphragm (242); 17 the improvement comprising:

18 said noise suppression structure ftirther comprising a noise suppression 19 device (30) attached to said body (21), wherein said noise suppression device (30) cornprises:, 21 at least one air inlet chamber (325) defining an air suction hole. (316), 22 and a third air inlet hole (317), said third air inlet hole (317) connecting to said first 23 air inlet hole (213); 24 at least one air guiding chamber (326) defining a third air outlet hole (318) connecting to said first air outlet hole (214); and at least one air drain pipe (35) connecting to said air guiding chamber 27 (326).

28 2. Ihe noise suppression structure as claimed in claim 1, wherein said noise 29suppression device (30) comprises:

6 1 an end cap (3 1) attached to said body (2 1) and defining said air suction 2 hole (316), said third air inlet hole (317), and said third air outlet hole (318), a first 3 baffle (312) secured in said end cap (31), thereby defining a first room (313) 4 connecting to said air suction hole (316) and said third air inlet hole (317), and a second room (314) connecting to said third air outlet hole (318); and 6. a casing (32) mounted on said end cap (3 1), a second baffle (322) 7 secured in said casing (32), thereby defining said air inlet chamber (325) connecting 8 to said first room (313), and defining said air guiding chamber (326) connecting to 9 said second room (314).

3. The noise suppression structure as claimed in claim 1, fin-ther comprising I I a connecting pipe (33) having a first end connecting to said first air inlet hole (213), 12 and a second end connecting to said third air inlet hole (317).

13 4. The noise suppression structure as claimed in claim 1, fin-ther comprising 14 a connecting pipe (34) having a first end connecting to said first air outlet hole (214),, and a second end connecting to said third air outlet hole (318).

16 5. The noise suppression structure as claimed in claim 1, finther comprising 17 a washer (215) mounted between said body (21) and said base (25).

18 6. The noise suppression structure as claimed in claim 2, wherein said noise 19 suppression device comprises two air inlet chambers, and two mating air guiding chambers,- and said noise suppression structure comprises two mating vibrating 21 cranks, and two mating compressing cups.

7

GB9925965A 1999-11-03 1999-11-03 Noise suppression of an air pump Withdrawn GB2356023A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB9925965A GB2356023A (en) 1999-11-03 1999-11-03 Noise suppression of an air pump
DE29919931U DE29919931U1 (en) 1999-11-03 1999-11-13 Schalldämmstruktur for an air pump

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9925965A GB2356023A (en) 1999-11-03 1999-11-03 Noise suppression of an air pump
DE29919931U DE29919931U1 (en) 1999-11-03 1999-11-13 Schalldämmstruktur for an air pump

Publications (2)

Publication Number Publication Date
GB9925965D0 GB9925965D0 (en) 1999-12-29
GB2356023A true GB2356023A (en) 2001-05-09

Family

ID=26062877

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9925965A Withdrawn GB2356023A (en) 1999-11-03 1999-11-03 Noise suppression of an air pump

Country Status (2)

Country Link
DE (1) DE29919931U1 (en)
GB (1) GB2356023A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2373029A (en) * 2001-02-20 2002-09-11 Meiko Pet Corp Air pump with noise suppression unit
FR2839535A1 (en) * 2002-05-10 2003-11-14 Rena Sa Air pump for aquarium comprises base on which cover is mounted, pump has air inlet and exhaust valves and flexible membrane activated by arm with permanent magnet, arm displaced by electrical coil associated with magnetic circuit

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6340069B1 (en) * 2000-07-19 2002-01-22 Meiko Pet Corporation Sound elimination structure for air pump
CN103939318A (en) * 2013-01-17 2014-07-23 常州雷利电机科技有限公司 Direct-current air pump used for automobile seat

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1150780A (en) * 1966-11-23 1969-04-30 Danfoss As A Combined Cylinder Head/Silencer Arrangement
GB1198138A (en) * 1966-11-18 1970-07-08 Danfoss As Sound-Absorbing apparatus for Hermetically Encapsulated Compressor
US4583922A (en) * 1983-12-29 1986-04-22 Diesel Kiki Co., Ltd. Swash plate type compressor improved with elongated and tortuous input and output passage systems
US5137432A (en) * 1991-05-28 1992-08-11 Tsai Hsien Tang Noise-preventative aquarium pump
US6007307A (en) * 1996-11-26 1999-12-28 Fujikin Incorporated Air pump with noise reduction partitions in the housing

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1198138A (en) * 1966-11-18 1970-07-08 Danfoss As Sound-Absorbing apparatus for Hermetically Encapsulated Compressor
GB1150780A (en) * 1966-11-23 1969-04-30 Danfoss As A Combined Cylinder Head/Silencer Arrangement
US4583922A (en) * 1983-12-29 1986-04-22 Diesel Kiki Co., Ltd. Swash plate type compressor improved with elongated and tortuous input and output passage systems
US5137432A (en) * 1991-05-28 1992-08-11 Tsai Hsien Tang Noise-preventative aquarium pump
US6007307A (en) * 1996-11-26 1999-12-28 Fujikin Incorporated Air pump with noise reduction partitions in the housing

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2373029A (en) * 2001-02-20 2002-09-11 Meiko Pet Corp Air pump with noise suppression unit
GB2373029B (en) * 2001-02-20 2003-01-22 Meiko Pet Corp Air pump with noise silence arrangement
FR2839535A1 (en) * 2002-05-10 2003-11-14 Rena Sa Air pump for aquarium comprises base on which cover is mounted, pump has air inlet and exhaust valves and flexible membrane activated by arm with permanent magnet, arm displaced by electrical coil associated with magnetic circuit

Also Published As

Publication number Publication date
GB9925965D0 (en) 1999-12-29
DE29919931U1 (en) 2000-02-03

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