FR2487114A1 - Safety switch for domestic appliances - is sensitive to water pressure - Google Patents
Safety switch for domestic appliances - is sensitive to water pressure Download PDFInfo
- Publication number
- FR2487114A1 FR2487114A1 FR8113431A FR8113431A FR2487114A1 FR 2487114 A1 FR2487114 A1 FR 2487114A1 FR 8113431 A FR8113431 A FR 8113431A FR 8113431 A FR8113431 A FR 8113431A FR 2487114 A1 FR2487114 A1 FR 2487114A1
- Authority
- FR
- France
- Prior art keywords
- water
- membrane
- pressure
- pressure switch
- gas contact
- 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
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H35/00—Switches operated by change of a physical condition
- H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
- H01H35/34—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by diaphragm
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H35/00—Switches operated by change of a physical condition
- H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
- H01H35/247—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow the switch being of the reed switch type
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Switches Operated By Changes In Physical Conditions (AREA)
Abstract
Description
Interrupteur manométrique de sécurité contre le manque d'eau dans des appareils ménagers.Safety pressure switch against lack of water in household appliances.
La présente invention concerne un interrupteur manométrique de sécurité contre le manque d'eau-dans des appareils ménagers, notamment des lave-vaisselle ou des séchoirs, muni d'une membrane qui est placée dans un carter alimenté en eau et agit au moins indirectement sur un interrupteur en étant soumise d'un côté à la pression de l'eau, de l'autre côté à la force d'un ressort de compression. The present invention relates to a safety pressure switch against lack of water in household appliances, in particular dishwashers or dryers, provided with a membrane which is placed in a casing supplied with water and acts at least indirectly on a switch being subjected on one side to the pressure of water, on the other side to the force of a compression spring.
Dans un interrupteur manométrique connu de même genre, la membrane agit sur le poussoir d'un interrupteur à touche. Cette membrane est soumise non seulement à la force du ressort de compression, mais aussi aux forces changeant par bonds des ressorts d'enclenchement de l'interrupteur. Cet interrupteur manométrique connu ne fonctionne donc que sous des pressions hydrauliques relativement élevées et est difficilement ajustable à des valeurs de commutation précises. In a known pressure switch of the same kind, the membrane acts on the push-button of a key switch. This membrane is subjected not only to the force of the compression spring, but also to the forces changing by leaps and turns of the switching springs of the switch. This known pressure switch therefore only works under relatively high hydraulic pressures and is difficult to adjust to precise switching values.
L'invention a pour objet un interrupteur manométrique de sécurité contre le manque d'eau qui ait une structure particulièrement simple et réagisse à de faibles pressions. The subject of the invention is a pressure gauge safety switch against lack of water which has a particularly simple structure and reacts to low pressures.
Cet interrupteur manométrique est caractérisé par le fait que sur la membrane repose au moins indirectement un aimant avec lequel coopère un contact à gaz protecteur fixé extérieurement au carter, réalisé sous forme fermée du côté du ressort. This pressure switch is characterized in that on the membrane rests at least indirectly a magnet with which a protective gas contact cooperates externally fixed to the casing, produced in closed form on the side of the spring.
I1 en résulte cet avantage que les valeurs de commutation du contact sont déterminées à peu près uniquement par le ressort de compression, lequel est réalisable avec de faibles tolérances. La structure fermée du carter du côté du ressort de compression empêche en outre toute sortie d'eau de l'interruptex manométrique en cas de défaut d'étanchéité de la membrane. I1 results in this advantage that the switching values of the contact are determined almost solely by the compression spring, which is achievable with low tolerances. The closed structure of the casing on the side of the compression spring also prevents any water leaving the manometric interruptex in the event of a leak in the diaphragm.
L'invention sera mieux comprise à l'aide de la description détaillée d'un mode de réalisation pris comme exemple non limitatif et illustré schématiquement par la figure unique du dessin annexé. The invention will be better understood with the aid of the detailed description of an embodiment taken as a nonlimiting example and illustrated diagrammatically by the single figure of the appended drawing.
L'interrupteur manométrique, de référence 1, présente un carter 2 en matière plastique composé d'une partie supérieure 3 avec une tubulure 4 pour tuyau souple et d'une partie inférieur 5 en forme de boîte cylindrique. Une membrane 6 est encastrée par ses bords sous étanchéité aux liquides entre ces deux parties de carter 3 et 5, fixées l'une à l'autre par des vis. The pressure switch, reference 1, has a plastic casing 2 composed of an upper part 3 with a tube 4 for flexible hose and a lower part 5 in the form of a cylindrical box. A membrane 6 is embedded by its edges under liquid tightness between these two housing parts 3 and 5, fixed to each other by screws.
Cette membrane 6 est soumise à la pression hydraulique du côté de la tubulure, tandis que, de l'autre côté, elle est attaquée à travers un poussoir 8 par un ressort de compression 7 placé dans la partie inférieure 5 du carter. Ce poussoir 8 porte un aimant permanent 9 avec lequel coopère un contact à gaz protecteur 10 fixé extérieurement sur ladite partie inférieure de carter 5, de structure fermée. Le contact à gaz protecteur 10 est placé dans un support qui est maintenu sur la partie inférieure de carter 5 par des moyens d'enclenchement.This membrane 6 is subjected to hydraulic pressure on the side of the tubing, while, on the other side, it is attacked through a pusher 8 by a compression spring 7 placed in the lower part 5 of the casing. This pusher 8 carries a permanent magnet 9 with which a protective gas contact 10 cooperates externally attached to said lower housing part 5, of closed structure. The protective gas contact 10 is placed in a support which is held on the lower part of the casing 5 by latching means.
Cet interrupteur manométrique fonctionne de la façon cidessous décrite. This pressure switch operates as described below.
La tubulure 4 de l'interrupteur manométrique 1 est reliée par une canalisation non représentée au tuyau souple d'arrivée à l'appareil ménager, alimenté en eau fraîche à partir d'un réseau de distribution. Si le robinet fixe d'arrêt du réseau de distribution d'eau, en amont du tuyau souple d'arrivée d'eau, est ouvert, la membrane 6 est soumise à la pression hydraulique du côté de la tubulure. Lorsque cette pression atteint un niveau suffisant pour le fonctionnement dudit appareil, la membrane 6 abandonne, en comprimant le ressort 7, sa position de repos représentée sur la figure. I1 se produit en même temps aussi, par le poussoir 8, un déplacement de l'aimant 9 par rapport au contact à gaz protecteur 10 qui lui est associé. Le champ de l'aimant 9 ne parvient alors plus à maintenir le contact à gaz protecteur 10 dans sa position de fermeture, si bien que ce dernier s'ouvre. La commande de l'appareil ménager reçoit de ce fait le signal suivant lequel le robinet d'arrêt du réseau de distribution d'eau est ouvert et l'on dispose d'eau fraîche sous une pression suffisante. The pipe 4 of the pressure switch 1 is connected by a pipe, not shown, to the flexible pipe arriving at the household appliance, supplied with fresh water from a distribution network. If the fixed stop valve of the water distribution network, upstream of the flexible water inlet pipe, is open, the membrane 6 is subjected to hydraulic pressure on the side of the tubing. When this pressure reaches a level sufficient for the operation of said device, the membrane 6 leaves, by compressing the spring 7, its rest position shown in the figure. I1 also occurs at the same time, by the pusher 8, a displacement of the magnet 9 relative to the protective gas contact 10 which is associated with it. The field of the magnet 9 then no longer manages to maintain the protective gas contact 10 in its closed position, so that the latter opens. The control of the household appliance therefore receives the signal that the shut-off valve of the water distribution network is open and fresh water is available under sufficient pressure.
Une trop forte baisse ou une absence de pression hydraulique amène ou maintient, par l'action du ressort de compression 7, la membrane 6 à sa position de repos représentée sur la figure. En ce cas, le champ de l'aimant 9 garde le contact à gaz protecteur 10 fermé. Dans cette position du contact 10, alors que l'appareil ménager est en circuit, la commande de ce dernier voit le signe d'une perturbation de l'amenée d'eau. An excessive drop or absence of hydraulic pressure brings or maintains, by the action of the compression spring 7, the membrane 6 in its rest position shown in the figure. In this case, the field of the magnet 9 keeps the protective gas contact 10 closed. In this position of the contact 10, while the household appliance is on, the latter's control sees the sign of a disturbance in the water supply.
Claims (3)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19808018968U DE8018968U1 (en) | 1980-07-15 | 1980-07-15 | PRESSURE SWITCH FOR SECURING WATER DEFICIENCY IN HOUSEHOLD APPLIANCES |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2487114A1 true FR2487114A1 (en) | 1982-01-22 |
FR2487114B1 FR2487114B1 (en) | 1985-06-14 |
Family
ID=6717214
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8113431A Expired FR2487114B1 (en) | 1980-07-15 | 1981-07-08 | SAFETY MANOMETRIC SWITCH AGAINST LACK OF WATER IN HOUSEHOLD APPLIANCES |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE8018968U1 (en) |
FR (1) | FR2487114B1 (en) |
IT (1) | IT1167470B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4739208A (en) * | 1986-11-13 | 1988-04-19 | General Electric Company | Brush assembly including brush wear detector |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3227837A (en) * | 1963-09-05 | 1966-01-04 | Commercial Factors Ltd | Electro-magnetic controlled flow switch |
FR1588592A (en) * | 1968-09-19 | 1970-04-17 | ||
US3989911A (en) * | 1975-09-05 | 1976-11-02 | Perry Joseph A | Magnetic differential pressure switch |
-
1980
- 1980-07-15 DE DE19808018968U patent/DE8018968U1/en not_active Expired
-
1981
- 1981-07-08 FR FR8113431A patent/FR2487114B1/en not_active Expired
- 1981-07-13 IT IT22900/81A patent/IT1167470B/en active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3227837A (en) * | 1963-09-05 | 1966-01-04 | Commercial Factors Ltd | Electro-magnetic controlled flow switch |
FR1588592A (en) * | 1968-09-19 | 1970-04-17 | ||
US3989911A (en) * | 1975-09-05 | 1976-11-02 | Perry Joseph A | Magnetic differential pressure switch |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4739208A (en) * | 1986-11-13 | 1988-04-19 | General Electric Company | Brush assembly including brush wear detector |
Also Published As
Publication number | Publication date |
---|---|
IT1167470B (en) | 1987-05-13 |
IT8122900A0 (en) | 1981-07-13 |
DE8018968U1 (en) | 1980-10-23 |
FR2487114B1 (en) | 1985-06-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |