EP0863243A2 - Überlauf- oder Leckerkennungsvorrichtung für Waschmaschinen - Google Patents

Überlauf- oder Leckerkennungsvorrichtung für Waschmaschinen Download PDF

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Publication number
EP0863243A2
EP0863243A2 EP97420199A EP97420199A EP0863243A2 EP 0863243 A2 EP0863243 A2 EP 0863243A2 EP 97420199 A EP97420199 A EP 97420199A EP 97420199 A EP97420199 A EP 97420199A EP 0863243 A2 EP0863243 A2 EP 0863243A2
Authority
EP
European Patent Office
Prior art keywords
leak
housing
gas
liquid
detection device
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Withdrawn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
EP97420199A
Other languages
English (en)
French (fr)
Inventor
Jean-Claude Buffet
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.)
BorgWarner Transmission Systems Monaco SAM
Original Assignee
Eaton SAM
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 Eaton SAM filed Critical Eaton SAM
Publication of EP0863243A2 publication Critical patent/EP0863243A2/de
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/081—Safety arrangements for preventing water damage

Definitions

  • the present invention relates to a device for leak or overflow or other detection liquid, for a washing machine or washing up.
  • This leak or leak detection device overflow is itself part of a security system, whose role is to limit the damage caused by leaks or overflows of water, when closing the water supply to the machine concerned, in the event of detection of a leak or overflow.
  • the proposed device can be integrated in a security system capable of intervening also good in case of fault on the water supply pipe of the washing machine, only in the event of a leak or overflow inside this washing machine.
  • this known safety device 1 is placed at the hydraulic connection 2 of the hose 3 supplying water to the washing machine 4.
  • the flexible 3 includes inner pipe 5 normally traversed by the water brought to the machine 4, and a sheath waterproof exterior 6.
  • the safety device 1 comprises a mechanical sensor, which reacts to the pressure of everything liquid reaching the annular space 7 located between the pipe 5 and the sheath 6, such a presence of liquid being considered an undesirable leak. When he is actuated, the mechanical sensor controls an internal valve to safety device 1, which interrupts the flow water to hose 3, and therefore to the washing machine 4.
  • the safety device 1 has a passage 8, which connects the annular space 7, located between the pipe 5 and the sheath 6, to an annular chamber 9 in which is mounted, axially movable, an annular piston 10.
  • the pressure resulting from water leakage from hose 5 is also transmitted in room 9, and causes a displacement axial of the annular piston 10, against which this pressure.
  • the movement of the piston 10 releases a pin 11 which, moved by a spring 12, releases itself a rod movable axial 13, which carries a shutter 14 pushed by a other spring 15. This action closes the valve internal to safety device 1, located upstream of the hose 3 and washing machine 4.
  • the safety device here mentioned has the disadvantage or insufficiency of being effective only in the event of a hose leak 3, but not to react to leaks or overflows producing inside the washing machine 4.
  • the present invention aims to eliminate this disadvantage, by providing a device for detecting leak or overflow, which can be used efficiently anywhere and especially for detect a leak or an overflow of water inside of the washing machine, the proposed device can be associated with the previously known security device mentioned, or be used independently of it.
  • the subject of the invention is a leak or overflow detection device for washing machine, which consists essentially of a case provided with at least one opening allowing the entry of a liquid following a leak or overflow, and containing at least one body or one substance which, in contact with the liquid to be detected penetrating in the housing through the aforementioned opening, is suitable for produce a gas, the housing still having an orifice for the escape of gas to a means of detecting this gas.
  • the invention provides a device for simple, light leak or overflow detection and compact, and which is independent of any source of energy, any spring and any other system of mechanical trigger, which may be dangerous or ineffective, if blocked or corroded over time, whether used or not.
  • the device object of the invention can be installed in any location where leaks or overflows of water or other liquid may occur, or be collected. So this detection device can be especially placed towards the bottom of a washing machine.
  • the principle of gas evolution, specific to the the invention also makes it possible to detect this gas by any appropriate means, directly associated with the housing or, contrary, located at a distance from the box to which it can be connected by any suitable conduit.
  • Gas detection significant of a leak or an overflow, can itself trigger an alarm and / or activate a means of setting in safety, in particular by closing a valve which cuts the water supply to the washing machine.
  • suitable chemicals are chosen to react to the presence of water, while remaining insensitive to ambient humidity.
  • the detection device includes a form box cylindrical or prismatic, the side wall of which includes the opening for the entry of the liquid to be detected, the bottom of which is provided with means for positioning at least one pellet of a substance capable of producing a gas in contact with the liquid to be detected, and the face of which or the cover has the opening exhaust gas.
  • This hole is presented advantageously as a fitting or a chimney, on which can be connected the conduit leading by means of gas detection, located at a distance from the housing.
  • the case is designed to contain a single tablet, of a substance able, by itself, to react to the liquid to be detected, releasing a gas.
  • the housing is provided to contain two lozenges, in substances different, such as an acid and a base, capable of react and produce a gas only if both are simultaneously immersed in the liquid to be detected.
  • substances different such as an acid and a base
  • the housing is provided to contain two lozenges, in substances different, such as an acid and a base, capable of react and produce a gas only if both are simultaneously immersed in the liquid to be detected.
  • the means of positioning the patch single, or both, as the case may be, are formed by parts such as legs making protrusion on the bottom of the case, inside this latest ; in particular, for a shaped tablet general circular, two opposite legs with profile curved are appropriate.
  • the device is preferably designed in such a way that the lateral inlet opening of the liquid to be detected either automatically closed, quickly enough, after initiation of the gas producing reaction.
  • the case still contains a lever, subjected to the action of a spring and mounted so as to pivot so that part of this lever is able to close the inlet opening of the liquid to be detected, the lever comprising a spout capable of being initially retained by hanging in a notch formed at the periphery of the single tablet or one of the tablets, so that keep the shutter part of this lever away from the aforementioned opening, the reduction in size and / or solidity of the tablet in contact with the liquid to be detected causing the release of the lever spout, and, under the effect of the spring, the application of the obturating part of this lever on the aforementioned opening.
  • Such a mechanism requires the use of a configuration pad particular, and the correct orientation of this patch inside the case; for this purpose, the tablet concerned still has, at its periphery, at least one notch cooperating with a complementary boss formed on a positioning part or tab projecting from the bottom of the case.
  • the detection device object of the invention is combined with the known security device, previously described and illustrated in Figures 1 and 2, which allows you to do the economy of a special detection means for gas, and to realize a global security system.
  • the gas exhaust port belonging to the housing of the device object of the invention, is connected by a leads to the annular space between the pipe inner and outer sheath of the hose. So a gas evolution in the box created in this space annular pressure similar to that resulting from a water entering the same annular space, and causing also the triggering of the safety device.
  • a non-return valve is inserted on the conduit connecting the housing to the hose.
  • FIG. 3 shows a washing machine 4, supplied with water by a hose 3 from which is placed a known safety device 1, as shown in detail in Figure 2 commented above.
  • the device leak detection or overflow object of the invention designated as a whole by the reference 17, completes safety device 1, and combines with this one, to detect leaks and overflows to inside the washing machine 4.
  • This leak or leak detection device overflow 17 mainly comprises a housing 18, placed in the lower part of the washing machine 4, on the bottom 19 thereof.
  • the case 18, and its elements internal, are shown in detail in Figures 4 and 5.
  • the housing 18 has a bottom 20, a side wall 21 of relatively low height, and a removable cover 22.
  • the wall side 21 is formed an opening 23, allowing entry of water or other liquid to be detected.
  • the housing 18 is designed to receive two pads 24 and 25, of generally circular shape, positioned on its bottom 20, at a distance from each other, these two lozenges being in different substances chosen to cause a chemical reaction with gas release, only when submerged simultaneously in water.
  • the first tablet 24 is in a basic substance
  • the second tablet 25 is in an acidic substance, more examples specific given below.
  • the bottom 20 of the housing 18 has two tabs 26 and 27 projecting, opposite to each other and each having a curved profile.
  • the first patch 24 has, at its periphery, a hooking notch 28 and a notch 29, diametrically opposites.
  • the bottom 20 of the housing 18 has a projecting part rounded 30, internally provided with a boss 31 complementary to the notch 29.
  • the patch 24 is thus angularly positioned, so that its notch 28 is not covered by part 30.
  • lever 33 Inside the housing 18 is pivotally mounted, around an axis 32 perpendicular to the bottom 20, a lever 33, one end of which has a sealing pallet 34, located next to the entrance opening 23.
  • the other end of lever 33 is subjected to the action of a spring 35, pressing against the side wall 21 of the housing 18, and biasing the lever 33 in the direction of the application of the pallet 34 against the edge of opening 23.
  • the lever 33 At its end provided with the shutter pallet 34, the lever 33 also has a spout 36, directed towards the location of the first patch 24, when this tablet 24 is in place, spout 36 is hooked in the notch 28 of said pad 24, as shown on the Figure 5; the lever 33 is thus retained in a position such that the shutter blade 34 remains at a distance from opening 23, the spring 35 being compressed at maximum.
  • the cover 22 of the housing 18 is provided in its center of a gas exhaust port 37, made under the shape of a fitting or chimney on which is connected the outlet of a conduit 38, leading to a means of remote gas detection.
  • the duct 38 is directed towards the outside, and it is connected to hose 3, more particularly to the annular space 7 located between the inner pipe 5 and the outer sheath 6 of this hose 3 (see also the Figure 2, left).
  • a non-return valve 39 is interposed on the conduit 38, at any point located between the housing 18 and the connection to the hose 3.
  • the gas released therefore escapes from the housing 18 to through the hole 37 of the cover 22, and it traverses the conduit 38 to reach the annular space 7 of the flexible 3, by crossing the valve 39. Arriving in space 7, the gas there creates an increasing pressure which move the annular piston 10 (see figure 2) and trigger safety device 1, causing the cut off the water flow to the washing machine 4, and possibly also activating a signaling visual, in the same way as if pressurized water had entered space 7 following a leak at hose level 3.
  • the tablet 24 must in particular be correctly oriented by means of its notch 29.
  • the lever 33 must also be reset, by inserting its beak 36 in the notch 28 of the patch 24, so as to release opening 23.
  • the first tablet 24 is for example made up of 0.7 g of sodium bicarbonate or other bicarbonate
  • the second tablet 25 is made up of 3 g of sodium pyrophosphate (or sodium dihydrogen phosphate); this produces approximately 300 cm 3 of carbon dioxide (CO 2 ).
  • the first tablet 24 consists of 1 g of ammonium dihydrogen phosphate
  • the second tablet 25 consists of 2 g of sodium metasilicate pentahydrate in the form of crystals (Na 2 SiO 3 5H 2 O), which produces about 300 cm 3 of gaseous ammonia.
  • None of the pastilles of these compositions can, alone, generate gas in the presence of humidity, and only a mixture, resulting from a flow of a pellet 24 to the other tablet 25 in the presence of water, can produce a gas, which prevents any untimely triggering of the security system.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Examining Or Testing Airtightness (AREA)
  • Sealing Devices (AREA)
EP97420199A 1997-02-13 1997-10-28 Überlauf- oder Leckerkennungsvorrichtung für Waschmaschinen Withdrawn EP0863243A2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9701910 1997-02-13
FR9701910A FR2759390A1 (fr) 1997-02-13 1997-02-13 Dispositif de detection de fuite ou de debordement pour machine a laver

Publications (1)

Publication Number Publication Date
EP0863243A2 true EP0863243A2 (de) 1998-09-09

Family

ID=9503879

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97420199A Withdrawn EP0863243A2 (de) 1997-02-13 1997-10-28 Überlauf- oder Leckerkennungsvorrichtung für Waschmaschinen

Country Status (2)

Country Link
EP (1) EP0863243A2 (de)
FR (1) FR2759390A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114623986A (zh) * 2022-02-22 2022-06-14 南京航空航天大学 一种基于气密性的滚筒洗衣机泄露检测装置及方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006047952A1 (de) * 2006-10-10 2008-04-17 BSH Bosch und Siemens Hausgeräte GmbH Hausgerät mit einer Sammelvorrichtung für Leckwasser
CN112240835A (zh) * 2019-07-19 2021-01-19 青岛海尔滚筒洗衣机有限公司 一种洗衣机的气检装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114623986A (zh) * 2022-02-22 2022-06-14 南京航空航天大学 一种基于气密性的滚筒洗衣机泄露检测装置及方法
CN114623986B (zh) * 2022-02-22 2022-12-16 南京航空航天大学 一种基于气密性的滚筒洗衣机泄露检测装置及方法

Also Published As

Publication number Publication date
FR2759390A1 (fr) 1998-08-14

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