EP0249766B1 - Boîtier isolant pour interrupteur thermique - Google Patents
Boîtier isolant pour interrupteur thermique Download PDFInfo
- Publication number
- EP0249766B1 EP0249766B1 EP87107470A EP87107470A EP0249766B1 EP 0249766 B1 EP0249766 B1 EP 0249766B1 EP 87107470 A EP87107470 A EP 87107470A EP 87107470 A EP87107470 A EP 87107470A EP 0249766 B1 EP0249766 B1 EP 0249766B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- insulating housing
- switch
- parts
- envelope
- 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.)
- Expired - Lifetime
Links
Images
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 designs. It is known from DE-U-73 33 932 to provide such a switch with an insulation made of a thermoformed plastic cap which can be pushed onto the switch itself and which fully encloses it up to the connection end face, the connection side of the switch being embedded by means of casting resin. Furthermore, it was known from DE-A-27 28 487 to inject at least the free part of the switch, in particular in the area of the connection elements, under pressure in the case of switches with a fully enclosing insulating material cap.
- a casing be a housing pot consisting of a thermoplastic, in which the component, in particular a switch, is inserted and has a housing cover connected to it by means of an ultrasonic weld (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. 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 even render 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 a high insulating capacity.
- an insulating housing of the type mentioned at the outset which is characterized in that at least one oxide ceramic part is arranged between the thermal switch on the temperature-sensitive side facing away from its connecting contacts and the casing.
- the plastic sheathing is a pre-injected 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 mode of the plastic casing formed on the side 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 never closed after the introduction of switches and oxide ceramic plates, for example in the manner known per se, by casting or pressure spraying.
- the response speed is even higher than without the part with the same covering thickness.
- sheathing can never be made of any kind of plastic, with the use of doroplasts being preferable 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 positively inserted into one another with the release of only passages for connecting lines.
- This initially enables simple assembly of the overall switch.
- insulation requirements can be met by such a design, in particular in a further preferred embodiment that a part carries two webs with a relative distance, between which a further air chamber is formed in addition to the cavity for the switch and the ceramic parts, webs being tight rest on the connection cables.
- the upper part has at least one attachment, by means of which when assembled Housing the Kezamikmaschine be pressed against the bottom of the bottom 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 connecting contacts 7, to which connecting 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.
- the side of the sheathing 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 meets the required dielectric strength tests with high requirements with even small thickness and overall on the side of the bottom of the switch 2 there is sufficient insulation, 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, allows 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 numerals as in the embodiment of FIGS. 1 and 2.
- the embodiment of Figure 3 consists of a two-part preformed housing 1 'with lower part 21 and upper part 22, which are adapted to one another such 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 projecting 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 by the lugs 24 firmly against the bottom 12th of the lower part 21 pressed and the shape by the approaches 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)
Claims (7)
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 EP0249766A2 (fr) | 1987-12-23 |
EP0249766A3 EP0249766A3 (en) | 1989-04-12 |
EP0249766B1 true 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) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19532867C2 (de) * | 1995-09-06 | 2001-11-08 | Thermik Geraetebau Gmbh | Halter für ein temperaturabhängiges Schaltwerk |
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 |
Family Cites Families (12)
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 |
DE7333932U (de) * | 1973-09-19 | 1974-03-07 | Thermik Geraetebau Gmbh | Bimetallschalter mit Kunststoff-Isolierung |
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 |
DD206726A3 (de) * | 1981-09-23 | 1984-02-01 | Waschgeraetewerk Veb | Einrichtung zum thermischen schutz von heizelementen |
JPS58111166A (ja) * | 1981-12-24 | 1983-07-02 | Canon Inc | Romパツク |
DE3317100C2 (de) * | 1983-05-10 | 1986-12-11 | Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart | Überwachungseinrichtung für Kochplatten, insb. Glaskeramik-Kochplatten |
US4519015A (en) * | 1983-08-23 | 1985-05-21 | Lin Jiing S | Plug-in type of power supply |
US4641121A (en) * | 1985-11-04 | 1987-02-03 | Texas Instruments Incorporated | Sealed electrical switch and mounting therefor |
-
1987
- 1987-05-22 EP EP87107470A patent/EP0249766B1/fr not_active Expired - Lifetime
- 1987-05-22 AT AT87107470T patent/ATE70142T1/de not_active IP Right Cessation
-
1988
- 1988-09-08 US US07/241,479 patent/US4887063A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
ATE70142T1 (de) | 1991-12-15 |
EP0249766A3 (en) | 1989-04-12 |
US4887063A (en) | 1989-12-12 |
EP0249766A2 (fr) | 1987-12-23 |
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