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EP0088138A1 - Aérateur d'eau avec un niveau de bruit réduit - Google Patents

Aérateur d'eau avec un niveau de bruit réduit Download PDF

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Publication number
EP0088138A1
EP0088138A1 EP82101828A EP82101828A EP0088138A1 EP 0088138 A1 EP0088138 A1 EP 0088138A1 EP 82101828 A EP82101828 A EP 82101828A EP 82101828 A EP82101828 A EP 82101828A EP 0088138 A1 EP0088138 A1 EP 0088138A1
Authority
EP
European Patent Office
Prior art keywords
chamber
cross
chambers
section
aerator
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.)
Granted
Application number
EP82101828A
Other languages
German (de)
English (en)
Other versions
EP0088138B1 (fr
Inventor
Elie P. Aghnides
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to EP19820101828 priority Critical patent/EP0088138B1/fr
Priority to DE8282101828T priority patent/DE3271977D1/de
Publication of EP0088138A1 publication Critical patent/EP0088138A1/fr
Application granted granted Critical
Publication of EP0088138B1 publication Critical patent/EP0088138B1/fr
Expired legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
    • E03C1/02—Plumbing installations for fresh water
    • E03C1/08—Jet regulators or jet guides, e.g. anti-splash devices
    • E03C1/084—Jet regulators with aerating means

Definitions

  • the object of the present invention is to make a low noise and simple in construction aerator that satisfies the low noise requirements.
  • an aerator is constructed along the lines of my Patent 2,998,929, referred to above, except that the number of chambers is considerably increased, their cross-sections are substantially decreased, and the entranceways to the chambers have an aggregate cross-section at least as large as the cross-section of the chamber. The combination of these factors considerably reduces the noise produced by the water flowing through the aerator.
  • a number of typical examples setting forth the number and size of the chambers as well as the size of the entrance openings is set forth.
  • the thickness of the upstream disc may be 1.75 mm, which means that each chamber will have that height; (b) the chambers form three concentric rows -- the inner row has 10 chambers -- the middle row has 18 chambers -- and the outer row has 22 chambers, making a total of 50 chambers; (c) each such chamber has a square cross-section with each side 0.6 mm long thus providing a cross-section for the chamber of 0.36 mm2; (d) each chamber has two entrance openings at its upstream end, and each entrance opening has dimensions of 0.45 mm x 0.50 mm, in other words, a cross-section of 0.225 mm2; and (e) since there are two such entrance openings for the chamber, the aggregate cross-section of the entrance openings is 0.45 mm 2 which is larger than the 0.36 mm 2 cross-section of the chamber.
  • the chamber is full of water; nevertheless, the water is turbulated in the chamber by the mixing action created by the opposing entrance openings, and therefore, the water discharged from each chamber has impaired coherence so that it will pick up air on its way to the aerating screen, and create a better mixing action at the aerating screen.
  • aerating screen only one or two aerating screens are required.
  • Such an aerator has the reduced noise requirements required to meet existing requirements in Germany, and considerably lower noise than the aerators on the market in the United States.
  • the noise produced by aerators in Germany must be below certain levels, for example, 15 db, when measured according to the procedures outlined in certain documents entitled:
  • Figure 2 of this application is taken from page 2 of Part 1 of said document and shows briefly the test procedure for testing the noise created by an aerator.
  • water from a supply system enters pipe 30 which has a straight portion 31 attached to the test wall 32 of a test room 33, and it then passes via pipe 35 to the faucet (with aerator) 36.
  • the noise created by the aerator is transmitted via the water and/or the pipe to the test wall 32.
  • the vibrations of the test wall due to noise produced by the aerator creates noise in the room 33 which is measured by suitable instruments.
  • the details of the test procedure are described in the documents identified in the immediately preceding paragraph of this specification. These documents are incorporated in this application by reference, and a copy of each is in the file wrapper of this application as part of the Prior Art Statement filed on even date with this application.
  • the noise produced by a typical commercial prior art aerator is 18 db, whereas the regulations call for a noise level not greater than 15 db.
  • the noise level may be reduced to as low as 11 or 12 db.
  • the present invention differs from my prior patents in respect to the number of chambers, their size, and the size of the entrance openings, to reduce the noise created by the aerator.
  • the upstream disc 11 is supported by the metal casing 10.
  • the disc 11 has a depending skirt 11a, a central projection 11b for holding the screen in place, a ledge 11c for supporting the screen, and air slots 11d for allowing air to enter the mixing space.
  • Projections 11e are integral with the disc 11.
  • the disc 11 has three concentric rows of chambers 12, 13 and 14, the inner row of chambers 12 having 10 chambers, the middle row of chambers 13 having 18 chambers, and the outer row of chambers 14 having 22 chambers.
  • each chamber 12, 13 and 14 has two entrance openings at its upstream end, for example, chamber 13 has two entrance openings 15 and 16;
  • each of the entrance openings 15 and 16 has a rectangular cross-section, one pair of parallel sides being 0.45 mm long and the other pair of parallel sides being 0.5 mm long, so that the aggregate cross-section of the entrance openings for each chamber is 0.45 mm2; and
  • the disc 11 has a thickness A of 1.75 mm.
  • FIG 3 is a side cross-sectional view of one of the chambers together with its entrance openings.
  • the molded disc 11 includes a bridge 40 as an integral part of the disc 11.
  • the bridges 40 are supported by annular ribs in-between said bridges 40, leaving the entrance openings 15 and 16 in communication with the chamber 12 and defining an entrance opening height H', H indicating the height of the rib 41.
  • Similar bridges and in-between annular ribs are associated with the rows of chambers 13 and 14. Hence, all chambers and their associated entrance openings are substantially identical.
  • the disc 11 together with its several parts 11a, 11b, 11c, 11d, 11e and 40 are molded in one piece of a suitable plastic.
  • a washer 17 with entrance holes 18 makes a pressed type fit on projections 11e of the disc 11 and may limit the flow of water into the aerator, if desired.
  • the casing 10 may be attached to the faucet in any conventional manner, for example, by outside threads 20 which when screwed tightly into the inner threads of the faucet presses washer 17 against a ledge in the faucet to make the aerator water-tight, except that water passing through the faucet may flow through the holes 18, thence through the numerous entrance openings 15 and 16 to the chambers 12, 13 and 14, flooding those chambers, and discharging water from then in the form of streamlets having impaired coherence. These streamlets strike the screens 12 where final aeration takes place, and an aerated stream is discharged from the downstream end of the aerator.
  • the generic distinction of the present invention is that in an aerator of the type disclosed having a disc 11 whose thickness A is preferably 1.0 mm or more but at least 0.75 mm the disc 11 has at least 36 chambers such as 12, 13 and 14 of a cross-section less than 0.8 mm2, each chamber being topped by a pair of entrance openings, with the aggregate size of the entrance openings being about equal or preferably greater than the cross-section of the chamber, to produce an aerator having less than 15 decibels at 3 atmospheres water pressure measured according to the procedure set forth in said documents. Discs built with chambers two to three mm long gave satisfactory results.
  • a disc 11 with a dimension A of 1.75 mm has 78 chambers 12, 13 and 14 and a plurality of concentric rows, each chamber having a square cross-section of 0.5 mm on each side to give a cross-sectional area of 0.25 mm .
  • Each of the two entrance openings was also square and had dimensions of 0.4 x 0.4 mm, thus giving an cross-section for the two entrance openings combined of 0.32 mm2.
  • the noise produced by this aerator was 11.4 decibels and the rate of flow 16.3 liters per minute at a water pressure of three atmospheres. At 5 atmospheres the decibel level was 13.4 and the rate of flow 20.1 liters per minute.
  • An aerator whose disc 11 has a thickness A of 1.75 mm, had 86 chambers 12, 13 and 14 in concentric rows. Each chamber had a square cross-section of 0.5 mm on each side producing a cross-sectional area of 0.25 mm2. There were two entrance openings to each chamber. Each of these entrance openings was 0.35 mm on each side giving a total cross-sectional area for each entrance opening of 0.1225 mm2 or a total cross-sectional area for both the entrance openings of 0.245 mm2.
  • This aerator gave 15.8 liters per minute and had a noise level of 12 decibels at a water pressure of three atmospheres, measured according to the procedures set forth above.
  • the same disc, built with only 78 chambers had a noise level, at 3 atmospheres of 14.6 decibels.
  • a disc 11 having a thickness A of 1.75 mm had 40 chambers of square cross-section. Each chamber was 0.7 mm on each side for a cross-sectional area of the chamber of 0.49 mm2. Each chamber had two entrance openings, each of which was square and was 0.5 mm on each side so that each entrance opening had a cross-sectional area of 0.25 mm2, and both entrance openings combined had a cross-sectional area of 0.5 mm2.
  • This aerator gave 14.5 liters per minute and produced 15.6 decibels when the water pressure was 3 atmospheres and the measurements were taken as set forth above. At 5 atmospheres the decibel level rose to 24 and the rate of flow to 17.5 liters per minute.
  • Figure 5 shows an alternate form of chambers that may be used. Their height is at least 1.0 mm and their cross-section is square of about 0.7 x 0.7 mm, giving a cross-sectional area of about 0.49 mm2.
  • the chamber has only one entrance opening so that the water enters only through one side wall of the chamber to direct the water at another side wall of the chamber to thereby create turbulence in the chamber. Nevertheless, since the entrance opening has a cross-sectional area about as large or larger than the cross-section of the chamber, the chamber is flooded. The water discharged has impaired coherence.
  • the entrance opening may be square and at least 0.7 mm on each side, giving a cross-sectional area of 0.49 mm . There should be at least 40 of these chambers in the disc which is otherwise the same size as the disc described previously.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Details Of Valves (AREA)
  • Sanitary Device For Flush Toilet (AREA)
EP19820101828 1982-03-08 1982-03-08 Aérateur d'eau avec un niveau de bruit réduit Expired EP0088138B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19820101828 EP0088138B1 (fr) 1982-03-08 1982-03-08 Aérateur d'eau avec un niveau de bruit réduit
DE8282101828T DE3271977D1 (en) 1982-03-08 1982-03-08 Aerator with reduced noise

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19820101828 EP0088138B1 (fr) 1982-03-08 1982-03-08 Aérateur d'eau avec un niveau de bruit réduit

Publications (2)

Publication Number Publication Date
EP0088138A1 true EP0088138A1 (fr) 1983-09-14
EP0088138B1 EP0088138B1 (fr) 1986-07-16

Family

ID=8188907

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820101828 Expired EP0088138B1 (fr) 1982-03-08 1982-03-08 Aérateur d'eau avec un niveau de bruit réduit

Country Status (2)

Country Link
EP (1) EP0088138B1 (fr)
DE (1) DE3271977D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3711058A1 (de) * 1987-04-02 1988-10-13 Wildfang Dieter Kg Strahlregler
DE102013004076A1 (de) * 2013-03-11 2014-09-11 Neoperl Gmbh Strahlregler mit Prallfläche und Ringwandung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2998929A (en) * 1957-02-18 1961-09-05 Elie P Aghnides Water aerators
US3229916A (en) * 1961-05-09 1966-01-18 Elie P Aghnides Aerators having enlarged stream outlets
US3712548A (en) * 1970-08-20 1973-01-23 E Aghnides Water aerator
US4313564A (en) * 1979-01-17 1982-02-02 Shames Sidney J Self-cleaning aerator with noise reduction

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2998929A (en) * 1957-02-18 1961-09-05 Elie P Aghnides Water aerators
US3229916A (en) * 1961-05-09 1966-01-18 Elie P Aghnides Aerators having enlarged stream outlets
US3712548A (en) * 1970-08-20 1973-01-23 E Aghnides Water aerator
US4313564A (en) * 1979-01-17 1982-02-02 Shames Sidney J Self-cleaning aerator with noise reduction

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3711058A1 (de) * 1987-04-02 1988-10-13 Wildfang Dieter Kg Strahlregler
DE102013004076A1 (de) * 2013-03-11 2014-09-11 Neoperl Gmbh Strahlregler mit Prallfläche und Ringwandung
DE102013004076B4 (de) 2013-03-11 2022-06-23 Neoperl Gmbh Strahlregler mit Prallfläche und Ringwandung

Also Published As

Publication number Publication date
EP0088138B1 (fr) 1986-07-16
DE3271977D1 (en) 1986-08-21

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