EP0249766A2 - Boîtier isolant pour interrupteur thermique - Google Patents

Boîtier isolant pour interrupteur thermique Download PDF

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Publication number
EP0249766A2
EP0249766A2 EP87107470A EP87107470A EP0249766A2 EP 0249766 A2 EP0249766 A2 EP 0249766A2 EP 87107470 A EP87107470 A EP 87107470A EP 87107470 A EP87107470 A EP 87107470A EP 0249766 A2 EP0249766 A2 EP 0249766A2
Authority
EP
European Patent Office
Prior art keywords
switch
housing
parts
thermal switch
housing according
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
EP87107470A
Other languages
German (de)
English (en)
Other versions
EP0249766B1 (fr
EP0249766A3 (en
Inventor
Peter Hofsäss
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.)
HOFSASS P
Original Assignee
HOFSASS P
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 HOFSASS P filed Critical HOFSASS P
Priority to AT87107470T priority Critical patent/ATE70142T1/de
Publication of EP0249766A2 publication Critical patent/EP0249766A2/fr
Publication of EP0249766A3 publication Critical patent/EP0249766A3/de
Application granted granted Critical
Publication of EP0249766B1 publication Critical patent/EP0249766B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/32—Thermally-sensitive members
    • H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
    • H01H37/54—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting
    • H01H37/5427—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting encapsulated in sealed miniaturised housing

Definitions

  • the invention relates to an insulating housing for thermal switches, with a plastic casing.
  • Insulations for thermal switches are known in various configurations.
  • DE-GM 73 33 932 it is known from DE-GM 73 33 932 to provide such a switch with insulation from a thermoformed plastic cap which can be pushed onto the switch itself and which fully encloses this up to the connection end face, the connection side of the switch being embedded by means of casting resin.
  • DE-OS 27 28 487 it was known from DE-OS 27 28 487 that at least at least the free part of the switch, in particular in the case of switches with a fully enclosing insulating material cap Area of the connection elements to be encapsulated under pressure.
  • a casing have a housing pot consisting of a thermoplastic, into which the component, in particular a switch, is inserted, and a housing cover connected to it by means of an ultrasonic weld seam (DE-GM 80 28 913).
  • insulating housings all fill the important task of good heat conduction from the outside to the thermal switch, so that it responds quickly and reliably to changes in temperature.
  • the known insulating housings have very thin plastic walls, so that they cannot meet the protection requirements of higher protection classes. In order to meet these protection requirements, much thicker walls of the insulating housing would be required, but this would reduce the quality of the entire insulated thermal switch, in particular with regard to its response speed, and would therefore make such a switch unusable.
  • the invention is therefore based on the object of providing an insulating housing for thermal switches which nevertheless ensures good and rapid heat transfer from the outside to the switch arranged in the housing with high insulating capability.
  • an insulating housing of the type mentioned at the outset which is characterized in that an at least one ceramic part is arranged at least on one side of the thermal switch between the latter and the casing.
  • a preferred embodiment of the insulating housing according to the invention provides that the oxide ceramic parts are arranged on the side facing away from the connection contacts of the switch.
  • the plastic sheathing is a pre-sprayed sheathing which has an insertion side with a guide into which the Oxide ceramic parts are inserted, and in addition guide grooves are formed between a bottom of the plastic casing formed on the side thereof facing away from the connections of the switch, into which the oxide ceramic parts are inserted.
  • the insertion opening of the pre-molded insulating housing is closed after the introduction of switches and oxide ceramic plates, for example in the manner known per se, by casting or pressure spraying.
  • switches and oxide ceramic plates for example in the manner known per se, by casting or pressure spraying.
  • the sheathing can consist of any plastics, the use of doroplasts being preferred to thermoplastics at higher temperatures.
  • MgO or aluminum oxide ceramics which have good heat conduction and high insulation behavior can preferably be used as oxide ceramics. This should be due in particular to the flat heat transfer path created by the oxide ceramic parts. Basically, the replacement of an oxide ceramic part is possible, but preferably two platelets are used.
  • the housing consists of a lower part and an upper part, which can be inserted into one another in a form-fitting manner, leaving only passages for connecting lines free.
  • This initially enables simple assembly of the overall switch.
  • a part carries two webs with a relative spacing, between which, in addition to the cavity for the switch and the ceramic parts, a further air chamber is formed, webs being tight rest on the connecting cables.
  • the upper part has at least one attachment, by which at assembled housing, the ceramic parts are pressed against the bottom of the lower part.
  • the insulating housing 1 initially has a pre-injected plastic sheathing 2, which has a cavity 3 for receiving the thermal switch 4.
  • the thermal switch 4 has on one side 6 two connection contacts 7, to which connection lines 8 are fastened, in particular soldered, which are led out of the housing 1 through an insertion opening 9.
  • the thermal switch 4 has a metal housing which is in contact with one of the contacts 7 and one of the connecting lines 8 and is therefore a live part. While the parts of the casing 2 on the side of the contacts 7 and connecting lines 8 and in the region of the end face 11 of the casing 2 have a sufficient thickness, in particular of more than 2 mm, to meet specified insulation requirements, the side of the casing facing away from the contacts 7 is extremely thin trained so that it essentially only meets mechanical and stability requirements.
  • the ceramic parts 14 ', 14' are highly insulating, so that it fulfills the required dielectric strength tests with high requirements with even a small thickness and overall there is sufficient insulation on the bottom of the switch 2, but still the high response speed of the thermal switch 2 is ensured on temperature increases, since the additional ceramic parts 14 ', 14', in addition to their high insulating ability as such and also with the small thickness in which they can be used, enable good heat conduction. Basically, only one ceramic part or several parts can be used one above the other, in all cases the thickness of the entire ceramic layer can be kept limited by a correspondingly small plate thickness.
  • the same features are designated with the same reference symbols as in the embodiment of FIGS. 1 and 2.
  • the configuration of FIG. 3 consists of a two-part preformed housing 1 'with a bottom part 21 and top part 22 which are matched to one another in such a way that they initially leave the cavity 3 free for the oxide ceramic parts 14, 14 'and the actual thermal switch can be positively and firmly inserted into one another.
  • the upper part 22 has in the lower part 21 protruding lugs 24 which do not extend to the bottom 12 of the lower part 21, but just leave such a space that the ceramic plates 14, 14 'to be used are firmly against the bottom 12 by the lugs 24 of the lower part 21 pressed and the shape by the sentences 24 are held.
  • the lower part 2 has webs 26, 27 which extend perpendicularly to its bottom surface 12 and which are at a distance from one another, through which an air chamber 28 is formed in addition to the cavity 3.
  • the formation of the webs and their spacing create a sufficient creepage and air gap, the dimensions of which can be designed according to requirements.
  • the upper and lower parts fit tightly together. If necessary, they can also be welded to one another in the area of their contact seam, for example by ultrasound.

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Cookers (AREA)
  • Thermally Actuated Switches (AREA)
EP87107470A 1986-06-14 1987-05-22 Boîtier isolant pour interrupteur thermique Expired - Lifetime EP0249766B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87107470T ATE70142T1 (de) 1986-06-14 1987-05-22 Isoliergehaeuse fuer thermoschalter.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8616132U 1986-06-14
DE8616132 1986-06-14

Publications (3)

Publication Number Publication Date
EP0249766A2 true EP0249766A2 (fr) 1987-12-23
EP0249766A3 EP0249766A3 (en) 1989-04-12
EP0249766B1 EP0249766B1 (fr) 1991-12-04

Family

ID=6795580

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87107470A Expired - Lifetime EP0249766B1 (fr) 1986-06-14 1987-05-22 Boîtier isolant pour interrupteur thermique

Country Status (3)

Country Link
US (1) US4887063A (fr)
EP (1) EP0249766B1 (fr)
AT (1) ATE70142T1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0762454A2 (fr) * 1995-09-06 1997-03-12 Thermik Gerätebau GmbH Support pour un dispositif de commutation dépendant de la température

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6693507B1 (en) 2002-08-07 2004-02-17 Ruud Lighting, Inc. Thermal protector mounting bracket and improved thermally-protected ballast
US7920044B2 (en) * 2007-05-16 2011-04-05 Group Dekko, Inc. Appliance assembly with thermal fuse and temperature sensing device assembly
DE102009030353B3 (de) * 2009-06-22 2010-12-02 Hofsaess, Marcel P. Kappe für einen temperaturabhängigen Schalter sowie Verfahren zur Fertigung eines temperaturabhängigen Schalters
DE102009039948A1 (de) * 2009-08-27 2011-03-03 Hofsaess, Marcel P. Temperaturabhängiger Schalter

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2244390A7 (fr) * 1973-09-19 1975-04-11 Thermik Geratebau Gmbh
DE3227941A1 (de) * 1981-09-23 1983-04-14 VEB Waschgerätewerk Schwarzenberg, DDR 9430 Schwarzenberg Einrichtung zum thermischen schutz von heizelementen
DE3317100A1 (de) * 1983-05-10 1984-11-15 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Signaleinrichtung fuer kochplatten, insbesondere glaskeramik-kochplatten
US4641121A (en) * 1985-11-04 1987-02-03 Texas Instruments Incorporated Sealed electrical switch and mounting therefor

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3710193A (en) * 1971-03-04 1973-01-09 Lambda Electronics Corp Hybrid regulated power supply having individual heat sinks for heat generative and heat sensitive components
US3721865A (en) * 1971-10-29 1973-03-20 Gen Electric Plastic case power supply
US3801874A (en) * 1972-10-30 1974-04-02 Gen Electric Isolation mounting for semiconductor device
US3964009A (en) * 1975-11-03 1976-06-15 Bel Fuse Inc. Ac radiation choke insulator
DE3028178C2 (de) * 1980-07-25 1985-05-09 Brown, Boveri & Cie Ag, 6800 Mannheim Leistungshalbleiter-Modul
DE3153785C2 (de) * 1981-05-13 2002-12-05 Wickmann Werke Gmbh Kleinstsicherung
JPS58111166A (ja) * 1981-12-24 1983-07-02 Canon Inc Ｒｏｍパツク
US4519015A (en) * 1983-08-23 1985-05-21 Lin Jiing S Plug-in type of power supply

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2244390A7 (fr) * 1973-09-19 1975-04-11 Thermik Geratebau Gmbh
DE3227941A1 (de) * 1981-09-23 1983-04-14 VEB Waschgerätewerk Schwarzenberg, DDR 9430 Schwarzenberg Einrichtung zum thermischen schutz von heizelementen
DE3317100A1 (de) * 1983-05-10 1984-11-15 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Signaleinrichtung fuer kochplatten, insbesondere glaskeramik-kochplatten
US4641121A (en) * 1985-11-04 1987-02-03 Texas Instruments Incorporated Sealed electrical switch and mounting therefor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0762454A2 (fr) * 1995-09-06 1997-03-12 Thermik Gerätebau GmbH Support pour un dispositif de commutation dépendant de la température
EP0762454A3 (fr) * 1995-09-06 2000-02-02 Thermik Gerätebau GmbH Support pour un dispositif de commutation dépendant de la température

Also Published As

Publication number Publication date
EP0249766B1 (fr) 1991-12-04
ATE70142T1 (de) 1991-12-15
EP0249766A3 (en) 1989-04-12
US4887063A (en) 1989-12-12

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