EP0647956B1 - Dispositif de commutation à commande thermique avec système à balayage - Google Patents
Dispositif de commutation à commande thermique avec système à balayage Download PDFInfo
- Publication number
- EP0647956B1 EP0647956B1 EP19930810715 EP93810715A EP0647956B1 EP 0647956 B1 EP0647956 B1 EP 0647956B1 EP 19930810715 EP19930810715 EP 19930810715 EP 93810715 A EP93810715 A EP 93810715A EP 0647956 B1 EP0647956 B1 EP 0647956B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- temperature
- switching device
- contact portion
- rocker
- knife
- 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
- 239000002184 metal Substances 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 12
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims 2
- 238000005520 cutting process Methods 0.000 description 39
- 239000000463 material Substances 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000008901 benefit Effects 0.000 description 2
- 238000004049 embossing Methods 0.000 description 2
- 230000000284 resting effect Effects 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
-
- 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
- H01H35/26—Details
- H01H35/2671—Means to detect leaks in the pressure sensitive element
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/02—Contacts characterised by the material thereof
- H01H1/021—Composite material
- H01H1/025—Composite material having copper as the basic material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
- H01H11/0006—Apparatus or processes specially adapted for the manufacture of electric switches for converting electric switches
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/04—Bases; Housings; Mountings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/64—Contacts
- H01H37/70—Resetting means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
- H01H5/04—Energy stored by deformation of elastic members
- H01H5/18—Energy stored by deformation of elastic members by flexing of blade springs
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/50—Manual reset mechanisms which may be also used for manual release
- H01H71/62—Manual reset mechanisms which may be also used for manual release with means for preventing resetting while abnormal condition persists, e.g. loose handle arrangement
Definitions
- a temperature sensor which is filled with an expansion material and is connected to a drive element in such a way that each temperature change is converted into a linear movement of the drive element, can serve to drive the switching device. While a temperature monitor (TW) automatically switches on again after it has been switched off when the temperature has dropped sufficiently low, a temperature limiter (TB) remains blocked until it is switched on again by hand. An additional reset button is usually used for this.
- Safety temperature monitors (STW) and safety temperature limiters (STB) are partly with extended safety functions such as an actuation safety device or breakage safety device. The actuation safety device ensures that the system, which is protected against excess temperature with an STB, cannot be put into operation as long as the reset button is pressed in. The fracture safety device switches off the heating system if the expansion material is lost due to a leak in the temperature sensor. This property is also known as intrinsic safety.
- a temperature-controlled switching device with a tilting system is known in the version as STB under the designation RAK series 08 from the data sheet 1146 D from Landis & Gyr from June 1991.
- This tilting system consists of a rigid support and a rocker switch with a rocker contact piece that is clamped in the support.
- the tilt system is therefore not very easy to assemble. In this tilting system, the reset is made from the side opposite the drive.
- the invention has for its object to provide a temperature-controlled switching device with a tilting system, which can be installed without adjustment in the switching device, which is characterized by cost-effective production and can be formed into various temperature-controlled switching devices with a minimum of different components and a minimum of assembly-side settings .
- Fig. 1 shows a bistable tilting system 1, which consists of a U-shaped carrier 2 and a rocker switch 3, in its first stable position.
- the carrier 2 has a first cutting edge bearing 4, a second parallel cutting edge bearing 5, a drive surface 6 for the tilting system 1 and bores 7 for fastening the tilting system 1.
- the carrier 2 is designed with spring struts 8 in such a way that the second cutting edge bearing 5 can be moved on a circular arc around the first cutting edge bearing 4, which approximately corresponds to the movement along a y-axis 9 for the necessary deflections.
- the rocker switch 3 is designed in the form of a leaf spring 10 with a punched-out tongue 11, with a recess 12 and with a riveted rocker contact piece 13.
- FIG. 2 shows the same tilting system 1 in its second stable position.
- the drive point 6 is shifted from its rest position 6 'in the direction of the y-axis 9, so that the second cutting edge bearing 5 has moved through the plane of the leaf spring 10 and the tilting process from the first stable position (Fig. 1) into the second stable position has taken place.
- the leaf spring 10 is therefore between the drive surface 6 and the second cutting edge bearing 5, the position of the rocker switch 3 being similarly describable by a value y 2.
- the position y 1 is different from the position y 2 and the positive direction on the y axis 9 is determined such that the value y 1 is greater than the value y 2.
- the carrier 2 is designed in the form of a trapezoidal frame 14 such that the carrier 2 is approximately rigid in the plane of the frame 14.
- the bores 7 are threaded and arranged on a first side of the frame 14 in the vicinity of the first cutting edge bearing 4.
- the drive surface 6 is arranged on one of the first opposite second side of the frame 14 in the vicinity of the second cutting edge bearing 5.
- the legs of the trapezoid, which correspond to the third and fourth sides of the frame 14, are the spring struts 8, which enable the movement of the second cutting edge bearing 5 along the y-axis 9 against a predetermined spring force.
- the drive surface 6 has a hole 15, which makes the tilting system 1 (FIG. 1) usable in a temperature-controlled switching device with break resistance. Furthermore, the drive surface 6 can have an embossing.
- FIG. 5 schematically shows a temperature-controlled switching device in the operational ON position, which is designed as an STB.
- a metal strip 16 and the carrier 2 are fastened together on an insulating base plate 17.
- the size of the metal strip 16 is dimensioned and designed with an embossing point 16a in such a way that the second cutting edge bearing 5 of the carrier 2 is prestressed and can only be deflected in the direction of the positive y-axis 9 with respect to the first cutting edge bearing 4.
- the y position of the second cutting edge bearing 5 can consequently only assume values which are greater than a value denoted by y a .
- the first cutting edge bearing 4, the second cutting edge bearing 5 and the rocker contact piece 13 must lie approximately on a fictitious straight line in the switching point y s1 . This condition is automatically fulfilled, since the drive element 18 moves the second cutting edge bearing 5 against this notional straight line, which is defined by the first cutting edge bearing 4 and the rocker contact piece 13 resting on the first contact piece 19.
- the relative position of the contact pieces 19 and 20 to the fixed cutting edge bearing 4 of the tilting system 1, and the limitation of the possibility of movement of the second cutting edge bearing 5 by the metal strip 16 determine the sequence of the points y a and y s2 on the y axis 9 and thus the behavior the switching device.
- the switching device works as a temperature limiter if the distance a of the first contact piece 19 from the base plate 17 and the distance b of the second contact piece 20 from the first contact piece 19 are dimensioned such that the condition y s1 > y a > y s2 is fulfilled.
- the switching point y s2 lies outside the range of motion of the second cutting edge bearing 5, so that automatic switching on is not possible.
- the stability of the OFF position is ensured by an additional special feature in the structure and design of the temperature-limiting switching device.
- the distance b is namely set so large and the tongue 11 is designed such that the switching rocker 3 resting on the second contact piece 20 after tilting presses the tongue 11 with a force against the second cutting edge bearing 5, the component of which along the y-axis 9 is larger is than the restoring force of the carrier 2 caused by the spring struts 8.
- the second cutting edge bearings 5 are therefore deflected further in the positive y direction 9 and the carrier 2 is detached from the drive element 18.
- the tilt system 1 is thus completely independent of the y position of the drive element 18 in the OFF position and can only be reset by hand.
- the base plate 17 can have a stop means 29 and the metal strip 21 can be resiliently attached to the base plate 17 in such a way that it presses against the stop means 29 with a predetermined minimum force, so that the first contact piece 19 is always in a well-defined position.
- the reset plunger 26 can be designed in two stages, so that when the reset plunger 26 is actuated, its first stage on the metal strip 21 and its second stage on the rocker switch 3 come to rest such that a distance remains between the rocker contact piece 13 and the first contact piece 19 and the electrical contact between them is safely broken as long as the reset plunger is actuated. The provision is therefore safe to operate.
- the stop means 29 can also be designed as an integral part of the base plate 17.
- the distance c between the break safety spring 24 and the tongue 11 of the rocker switch 3 can be adjusted so that the break safety spring 24 presses the drive element 18 against the temperature sensor 28 against the temperature sensor 28 in the event of a loss of the expansion material due to a leak in the temperature sensor 28 predetermined force on the tongue 11 of the rocker switch 3 comes to rest and triggers the tilting in the OFF position.
- the fracture safety spring 24 remains in its rest position and prevents the monitored system from being switched on again as long as the defect in the sensor system 28 has not been remedied.
- the tilting system 1 is ideally suited for the expansion of the temperature-controlled switching device with safety functions such as break resistance or actuation safety.
- the tilting system 1 consists of only two parts that can be preassembled.
- the optimal setting of the tilting system 1 results automatically when the temperature-controlled circuit is calibrated, which considerably simplifies the assembly.
- the tilting behavior and thus the mode of operation as TR, TW or TB can be set by means of a single parameter, namely the distance b of the second contact piece 20 from the first contact piece 19.
- the breakage safety function can be installed in a modular manner in the case of a safety temperature limiter or safety temperature monitor with a simple spring 24 and simple setting.
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Thermally Actuated Switches (AREA)
Claims (9)
- Dispositif de commutation commandé par la température, comprenant un système basculant (1) disposé sur une plaque de base (17) et qui comprend un support (2), qui est réalisé avec un premier support à couteau (4) et un second support à couteau parallèle (5), et une bascule de commutation (3) comportant un élément de contact (13), et dans lequel la bascule de commutation (3) est réalisée sous la forme d'un ressort à lame (10) comportant une ouverture (12) et une languette (11), est accrochée au moyen de l'ouverture (12) au premier support à couteau (4) du support (2) et prend appui, par l'extrémité libre de la languette (11) dans le second support à couteau (5), et dans lequel l'élément de contact (13) de la bascule forme, avec un premier élément de contact (19), un interrupteur électrique, et comportant un élément d'entraînement (18), qui est commandé par un capteur de température (28) rempli par un matériau de dilatation, caractérisé en ce que le second support à couteau (5) peut se déplacer par rapport au premier support à couteau (4), le long d'un axe y (9), que le système basculant (1) peut basculer depuis une position OUVERTURE dans une position FERMETURE, lors de l'action d'une force sur une surface d'entraînement (6) située sur le support (2) et que le mouvement de basculement depuis la position OUVERTURE dans la position FERMETURE s'effectue en sens opposé à la force (K) qui agit sur la surface d'entraînement (6).
- Dispositif de commutation commandé par la température selon la revendication 1, comportant un dispositif de sécurité en cas de rupture, caractérisé en ce que le dispositif de sécurité en cas de rupture est constitué par un ressort (24) et par une vis de réglage (25) et que la vis de réglage (25) s'applique sur l'élément d'entraînement (18) de telle sorte que dans le cas d'une perte du matériau de dilatation par un trou du capteur de température (28), le ressort (24) repousse la languette (11) avec une force prédéterminée de sorte que le système basculant (1) bascule dans la position FERMETURE.
- Dispositif de commutation commandé par la température selon la revendication 1 ou 2, caractérisé en ce que le support (2) est constitué par un alliage CuNi9Sn2.
- Dispositif de commutation commandé par la température selon l'une des revendications 1 à 3, caractérisé en ce que la bascule de commutation (3) est formée par l'alliage CuZn23Al3,5Co ou par l'alliage CuSn1Ni1CrTi.
- Dispositif de commutation commandé par la température selon l'une des revendications 1 à 4, caractérisé en ce que le dispositif de commutation commandé par la température est un limiteur de température, que les positions relatives du premier support à couteau (4), du premier élément de contact (19) ainsi que d'un second élément de contact (20), qui établit un contact électrique avec l'élément de contact (13) de la bascule dans la position FERMETURE, sont prédéterminés de telle sorte et la possibilité de déplacement du second support à couteau (5) par rapport au premier support à couteau (4) est limitée de telle sorte que, dans la position FERMETURE, le point de commutation FERMETURE → OUVERTURE (ys2) du sytème basculant (1) est situé à l'extérieur de la zone de déplacement du second support à couteau (5).
- Dispositif de commutation commandé par la température selon la revendication 5, caractérisé en ce que la distance (b) entre le second élément de contact (20) et le premier élément de contact (19) est dimensionnée d'une manière suffisante et la force de rappel du support (2) et la composante de force de la languette (11) de la bascule de commutation (3) dans la direction de l'axe y (9) sont dimensionnées, dans leur rapport, de telle sorte que, dans la position OUVERTURE, la surface d'entraînement (6) du support (2) est écartée de l'élément d'entraînement (18).
- Dispositif de commutation commandé par la température selon la revendication 5 ou 6, comportant un poussoir de rappel (26) et un moyen de butée (29), caractérisé en ce que le premier élément de contact (19) est disposé sur une bande métallique (21), qui est fixée élastiquement à la plaque de base (17) et s'appuie avec une force prédéterminée contre le moyen de butée (29), et que le poussoir de rappel (26) comporte deux parties étagées, de sorte que lors de l'actionnement, le poussoir de rappel (26) repousse la bande métallique (21) et la bascule de commutation (3) de telle sorte que le contact électrique entre l'élément de contact (13) de la bascule de commutation (3) et le premier élément de contact (19) est interrompu pendant le rappel.
- Dispositif de commutation commandé par la température selon l'une des revendications 1 à 4, caractérisé en ce que le dispositif de commutation commandé par la température est un régulateur de température ou un contrôleur de température et que les positions relatives du premier support à couteau (4), du premier élément de contact (19) ainsi que d'un second élément de contact (20), qui établit un contact électrique avec l'élément de contact (13) de la bascule, dans la position OUVERTURE, sont prédéterminés de telle sorte que, dans la position OUVERTURE, le point de commutation OUVERTURE → FERMETURE (ys2) du système basculant (1) est situé dans la zone de déplacement du second support à couteau (5).
- Dispositif de commutation commandé par la température selon l'une des revendications 1 à 8 comportant des couteaux de connexion électriques (16b;21b;22b;30b) et une partie supérieure (32) du boîtier, caractérisé en ce que les couteaux de connexion (16b;21b;22b;30b) sont agencés en tant que partie des bandes métalliques (16;21; 22;30) et sont disposés, côté connexion, sous la forme de contacts à enfichage sur la plaque de base isolante (17) sur le côté, qui est situé à l'opposé de l'élément d'entraînement (18), dans un renfoncement (31) de la partie supérieure (32) du boîtier et que le renfoncement (31) sert à loger une partie d'un boîtier à douille.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE59300314T DE59300314D1 (de) | 1993-10-12 | 1993-10-12 | Temperaturgesteuerte Schalteinrichtung mit einem Kippsystem. |
EP19930810715 EP0647956B1 (fr) | 1993-10-12 | 1993-10-12 | Dispositif de commutation à commande thermique avec système à balayage |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19930810715 EP0647956B1 (fr) | 1993-10-12 | 1993-10-12 | Dispositif de commutation à commande thermique avec système à balayage |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0647956A1 EP0647956A1 (fr) | 1995-04-12 |
EP0647956B1 true EP0647956B1 (fr) | 1995-06-28 |
Family
ID=8215044
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19930810715 Expired - Lifetime EP0647956B1 (fr) | 1993-10-12 | 1993-10-12 | Dispositif de commutation à commande thermique avec système à balayage |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0647956B1 (fr) |
DE (1) | DE59300314D1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108461351B (zh) * | 2018-05-02 | 2024-01-30 | 佛山市欧一电器制造厂有限公司 | 一种大功率可控温控器 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2262598A1 (de) * | 1972-12-21 | 1974-06-27 | Junkers & Co | Elektrischer schalter mit einem temperaturempfindlichen stellglied |
CH623146A5 (en) * | 1977-09-14 | 1981-05-15 | Landis & Gyr Ag | Intrinsically safe temperature limiter |
DE2815987C2 (de) * | 1978-04-13 | 1986-02-06 | E.G.O. Elektro-Geräte AG, Zug | Temperaturregler |
CH629623A5 (en) * | 1978-05-24 | 1982-04-30 | Landis & Gyr Ag | Intrinsically safe temperature limiter |
-
1993
- 1993-10-12 DE DE59300314T patent/DE59300314D1/de not_active Expired - Fee Related
- 1993-10-12 EP EP19930810715 patent/EP0647956B1/fr not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE59300314D1 (de) | 1995-08-03 |
EP0647956A1 (fr) | 1995-04-12 |
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