DE29703009U1 - Liquid pump - Google Patents
Liquid pumpInfo
- Publication number
- DE29703009U1 DE29703009U1 DE29703009U DE29703009U DE29703009U1 DE 29703009 U1 DE29703009 U1 DE 29703009U1 DE 29703009 U DE29703009 U DE 29703009U DE 29703009 U DE29703009 U DE 29703009U DE 29703009 U1 DE29703009 U1 DE 29703009U1
- Authority
- DE
- Germany
- Prior art keywords
- liquid
- pump
- bypass valve
- valve body
- liquid pump
- 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.)
- Expired - Lifetime
Links
- 239000007788 liquid Substances 0.000 title claims description 18
- 238000007789 sealing Methods 0.000 claims description 5
- 239000007921 spray Substances 0.000 claims description 5
- 239000002324 mouth wash Substances 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 229940051866 mouthwash Drugs 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000035699 permeability Effects 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
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/02—Stopping, starting, unloading or idling control
- F04B49/03—Stopping, starting, unloading or idling control by means of valves
- F04B49/035—Bypassing
-
- 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
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
- F04B49/24—Bypassing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Jet Pumps And Other Pumps (AREA)
- Safety Valves (AREA)
Description
ROWENTA - WERKE GMBHROWENTA - WORKS GMBH
Waidstraße 232Waidstrasse 232
D-63071 Offenbach am MainD-63071 Offenbach am Main
Die Erfindung betrifft eine Flüssigkeitspumpe für Mundspülgeräte nach dem Oberbegriff des Anspruchs 1.The invention relates to a liquid pump for mouthwash devices according to the preamble of claim 1.
Mundspüigeräte sind mit einer Flüssigkeitspumpe ausgerüstet, die Wasser aus einem Flüssigkeitsbehälter in Form eines pulsierenden Flüssigkeitssiroms zu einer Spritzdüse fördert. Um zu verhindern, daß bei geschlossener Spritzdüse und laufender Pumpe in der Pumpenkammer ein Überdruck entsteht, sind die bekannten Flüssigkeitspumpen mit einem Überdruckschutz in Form einer Fiüssigkeitsrückführung über ein Bypassventil zwischen Pumpenkammer und Wassereinlaß versehen. Das Bypassventil besitzt einen federbelasteten Ventiikörper, wobei durch Einstellen der Federkraft der Druck in der Pumpenkammer reguliert werden kann.Mouthwashes are equipped with a liquid pump that pumps water from a liquid container to a spray nozzle in the form of a pulsating liquid stream. To prevent excess pressure from building up in the pump chamber when the spray nozzle is closed and the pump is running, the known liquid pumps are equipped with excess pressure protection in the form of a liquid return via a bypass valve between the pump chamber and the water inlet. The bypass valve has a spring-loaded valve body, whereby the pressure in the pump chamber can be regulated by adjusting the spring force.
Diese bekannten Flüssigkeitspumpen haben den Nachteil, daß der im Pumpenraum erzeugte Druck über das Bypassventil in den relativ drucklosen Pumpeneinlaß entlassen wird. Hierbei entstehen im Betrieb unerwünschte Geräusche. Diese Geräusche werden durch Schwingungen erzeugt, die dadurch entstehen, daß bei Ansprechen des Bypassventiis die Flüssigkeit zwischen Ventilkörper und Ventilsitz mit hoher Geschwindigkeit hindurchströmt.These known liquid pumps have the disadvantage that the pressure generated in the pump chamber is released via the bypass valve into the relatively pressure-free pump inlet. This creates undesirable noises during operation. These noises are generated by vibrations that arise when the liquid flows between the valve body and the valve seat at high speed when the bypass valve is activated.
Es ist die Aufgabe dieser Erfindung, eine Flüssigkeitspumpe für Mundspülgeräte zu schaffen, bei der bei Ansprechen des Bypassventiis keine unerwünschten Geräusche entstehen.It is the object of this invention to create a liquid pump for mouthwash devices in which no undesirable noises are generated when the bypass valve is activated.
Gelöst wird diese Aufgabe durch die kennzeichnenden Merkmale des Anspruchs 1.This problem is solved by the characterizing features of claim 1.
• ··
Hierdurch wird erreicht, daß bei Ansprechen des Bypassventils sich im Gegendruckraum ein mittleres Druckniveau einstellt, wodurch die Strömungsgeschwindigkeit im Ventilbereich so gedrosselt wird, daß keine unangenehmen Geräusche entstehen können. Darüber hinaus sind vorteilhaft die Elastizität und die Dimension des Dichtelementes so gewählt, daß zwar eine Abdichtung stattfindet, jedoch bei geringem Druck eine Durchlässigkeit erreicht wird, so daß der aufgebaute Druck in der Pumpenkammer langsam entweichen kann.This ensures that when the bypass valve is activated, a medium pressure level is established in the counterpressure chamber, whereby the flow speed in the valve area is throttled so that no unpleasant noises can occur. In addition, the elasticity and dimensions of the sealing element are advantageously selected so that sealing takes place, but at low pressure permeability is achieved so that the pressure built up in the pump chamber can slowly escape.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird nachfolgend näher beschrieben.An embodiment of the invention is shown in the drawing and is described in more detail below.
Die in der Zeichnung dargestellte Flüssigkeitspumpe 1 weist ein Bypassventil 2 auf, das zwischen Wassereinlaß 7 und Wasserausiaß 8 angeordnet ist. Das Bypassventi! 2 besteht aus Ventilkörper 3, Dichielement 5, Druckfeder 4 und einer Verstelleinrichtung 9. Die Pumpe 1 arbeitet wie folgt:The liquid pump 1 shown in the drawing has a bypass valve 2, which is arranged between the water inlet 7 and the water outlet 8. The bypass valve 2 consists of a valve body 3, sealing element 5, compression spring 4 and an adjustment device 9. The pump 1 works as follows:
Durch einen nicht dargestellten Motor wird über das Pleuel 13 der Faltenbalg 12 in Tätigkeit gesetzt und Wasser aus einem nicht dargestellten Flüssigkeitsbehälter über den Wassereinlaß 7 angesaugt und über das Rückschlagventil 10 in die Pumpenkammer 11 und von dort über den Wasserauslaß 8 als pulsierender Flüssigkeitsstrom zu einer nicht dargestellten Spritzdüse gefördert. Damit bei geschlossener Spritzdüse und laufendem Motor in der Pumpenkammer 11 kein Überdruck entstehen kann, ist das Bypassventil 2 vorgesehen, über das dann die Flüssigkeit über den Wassereinlaß in den Flüssigkeitsbehälter zurückgefördert wird. Durch Betätigen der Verstelleinrichtung 9 kann die Federkraft der Druckfeder 4 eingestellt und dadurch der Druck in der Pumpenkammer 11 reguliert werden. Beim Ansprechen des Bypassventils 2 stellt sich im erfindungsgemäßen Gegendruckraum 6 ein mittleres Druckniveau ein. Hierdurch wird die Strömungsgeschwindigkeit im Ventiibereich so gedrosselt, daß keine unangenehmen Geräusche entstehen können.A motor (not shown) activates the bellows 12 via the connecting rod 13 and water is sucked in from a liquid container (not shown) via the water inlet 7 and conveyed via the check valve 10 into the pump chamber 11 and from there via the water outlet 8 as a pulsating liquid flow to a spray nozzle (not shown). To ensure that no excess pressure can build up in the pump chamber 11 when the spray nozzle is closed and the motor is running, the bypass valve 2 is provided, via which the liquid is then conveyed back into the liquid container via the water inlet. By operating the adjusting device 9, the spring force of the compression spring 4 can be adjusted and the pressure in the pump chamber 11 can be regulated. When the bypass valve 2 responds, a medium pressure level is established in the counterpressure chamber 6 according to the invention. This reduces the flow rate in the valve area so that no unpleasant noises can occur.
Claims (1)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE29703009U DE29703009U1 (en) | 1997-02-20 | 1997-02-20 | Liquid pump |
| FR9802008A FR2762052B1 (en) | 1997-02-20 | 1998-02-19 | LIQUID PUMP |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE29703009U DE29703009U1 (en) | 1997-02-20 | 1997-02-20 | Liquid pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE29703009U1 true DE29703009U1 (en) | 1997-04-30 |
Family
ID=8036256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE29703009U Expired - Lifetime DE29703009U1 (en) | 1997-02-20 | 1997-02-20 | Liquid pump |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE29703009U1 (en) |
| FR (1) | FR2762052B1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008125267A1 (en) * | 2007-04-11 | 2008-10-23 | Alfred Kärcher Gmbh & Co.Kg | High-pressure cleaning device |
| US8439653B2 (en) | 2009-10-01 | 2013-05-14 | Alfred Kaercher Gmbh & Co. Kg | Pump for a high-pressure cleaning apparatus |
| US8568109B2 (en) | 2009-10-01 | 2013-10-29 | Alfred Kaercher Gmbh & Co. Kg | Pump for a high-pressure cleaning device |
| US8684699B2 (en) | 2009-10-01 | 2014-04-01 | Alfred Kaercher Gmbh & Co. Kg | Pump for a high-pressure cleaning appliance |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1498933A (en) * | 1966-11-09 | 1967-10-20 | Simplified safety and relief valve | |
| FR1582151A (en) * | 1968-06-27 | 1969-09-26 | ||
| ES445020A1 (en) * | 1976-02-10 | 1977-06-01 | Bendiberica Sa | Pressure limiting valve with movable piston - has spherical seal attached to piston with stops limiting linear movement |
| US4182354A (en) * | 1978-05-02 | 1980-01-08 | U.S. ParaPlate Corporation | Method and apparatus for flow diversion in a high pressure fluid delivery system |
-
1997
- 1997-02-20 DE DE29703009U patent/DE29703009U1/en not_active Expired - Lifetime
-
1998
- 1998-02-19 FR FR9802008A patent/FR2762052B1/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008125267A1 (en) * | 2007-04-11 | 2008-10-23 | Alfred Kärcher Gmbh & Co.Kg | High-pressure cleaning device |
| US8790092B2 (en) | 2007-04-11 | 2014-07-29 | Alfred Kaercher Gmbh & Co. Kg | High-pressure cleaning appliance |
| US8439653B2 (en) | 2009-10-01 | 2013-05-14 | Alfred Kaercher Gmbh & Co. Kg | Pump for a high-pressure cleaning apparatus |
| US8568109B2 (en) | 2009-10-01 | 2013-10-29 | Alfred Kaercher Gmbh & Co. Kg | Pump for a high-pressure cleaning device |
| US8684699B2 (en) | 2009-10-01 | 2014-04-01 | Alfred Kaercher Gmbh & Co. Kg | Pump for a high-pressure cleaning appliance |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2762052A1 (en) | 1998-10-16 |
| FR2762052B1 (en) | 2001-10-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R207 | Utility model specification |
Effective date: 19970612 |
|
| R150 | Utility model maintained after payment of first maintenance fee after three years |
Effective date: 20000328 |
|
| R151 | Utility model maintained after payment of second maintenance fee after six years |
Effective date: 20021211 |
|
| R152 | Utility model maintained after payment of third maintenance fee after eight years |
Effective date: 20050511 |
|
| R071 | Expiry of right |