EP0859391A2 - Commutateur dépendant de la température avec étrier de retenue - Google Patents

Commutateur dépendant de la température avec étrier de retenue Download PDF

Info

Publication number
EP0859391A2
EP0859391A2 EP97118321A EP97118321A EP0859391A2 EP 0859391 A2 EP0859391 A2 EP 0859391A2 EP 97118321 A EP97118321 A EP 97118321A EP 97118321 A EP97118321 A EP 97118321A EP 0859391 A2 EP0859391 A2 EP 0859391A2
Authority
EP
European Patent Office
Prior art keywords
housing
plastic part
bracket
pocket
connection
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
EP97118321A
Other languages
German (de)
English (en)
Other versions
EP0859391A3 (fr
EP0859391B1 (fr
Inventor
Michael Becher
Edwin Güttinger
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.)
Thermik Geraetebau GmbH
Original Assignee
Thermik Geraetebau GmbH
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 Thermik Geraetebau GmbH filed Critical Thermik Geraetebau GmbH
Publication of EP0859391A2 publication Critical patent/EP0859391A2/fr
Publication of EP0859391A3 publication Critical patent/EP0859391A3/fr
Application granted granted Critical
Publication of EP0859391B1 publication Critical patent/EP0859391B1/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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/12—Means for earthing parts of switch not normally conductively connected to the contacts

Definitions

  • the present invention relates to a device for protection of an electrical device from overtemperature, with a temperature-dependent switch with a housing at the bottom a first connection contact is provided, one on the housing provided second connection contact and a holder that the housing carries and one with the second connection contact connected external connection.
  • a device of the aforementioned type is known from the DE 38 17 080 C2 known.
  • the known device comprises a holder made of plastic, in which a temperature-dependent switch with two parts Metal housing is arranged.
  • the connection contacts of the temperature-dependent Switch are once through the metal cover and formed on the other by the metal lower part, wherein in Inside the switch, a bimetal switch mechanism known per se is arranged.
  • the known device is based on connecting lugs of an electric motor attached and has a connection lug itself, which is accessible from the outside.
  • connection lug of the holder is with a contact plate connected, when the device is attached to the electric motor rests directly on the field winding.
  • the metal housing On the contact plate the metal housing with its inside the holder Ground on so that a thermal contact to the electric motor and an electrical contact to the terminal lug of the holder consists.
  • connection spring presses on the metal cover Connection flag of the electric motor is connected, however, after the attachment of the device is no longer accessible from the outside is.
  • the second connecting lug of the electric motor and the Terminal lug of the holder serve as external connections of the the known device provided electric motor.
  • the arrangement described is temperature-dependent Switches in series with the electric motor between the two External connections arranged.
  • the temperature is now increasing the excitation winding beyond a predetermined value, so the bimetal switchgear opens the electrical contact between the metal cover and the metal base, so that one to the External connections applied electrical voltage to the electric motor can no longer supply. This prevents that the electric motor is in operation over a predetermined Temperature warms up, so it becomes overtemperature protected.
  • the known device is not for many applications suitable because the holder used there is much too is bulky to work on small electrical household appliances, such as. a coffee machine, an electric kettle or electric hotplates.
  • Another The disadvantage of the known device is that it do not follow rapid temperature changes without delay can heat because of the metal cover and the metal base is led to the connecting lugs.
  • this object is achieved solved that the holder against the bottom of the housing electrically isolated and designed to be installed in the device Condition the bottom of the case to one provided on the device To press the contact surface.
  • the inventors of the present application have recognized that that it is with a temperature-dependent switch, as in the known device is used, the electrical Connecting and connecting the thermal coupling, which is no problem, particularly with flat thick-film heating systems is possible. Benefit from the fact that good electrical contact always good thermal contact is so that by pressing the bottom of the housing good thermal coupling of the switch to the one to be protected Device results.
  • Another advantage is the great security of the new one Device, namely the holder can be screwed or be welded on while the bottom of the case is using thermal paste or the like can be glued to the contact surface can. But there are two mechanical breakpoints that are geometrically spaced from each other, so that a more secure Guaranteed hold of the new device on the device to be protected is.
  • the holder has a includes to be attached to the device bracket that a Plastic part on which the housing and the external connection are arranged.
  • the housing Plastic part is thermally insulated so that only the minor Mass of the housing itself and, if applicable, the one connected to it follow the external connection of the temperature of the device to be protected have to.
  • only a very small amount of heat is required for this, the very good because of the good thermal coupling can be transferred quickly, so that the new device overall very quickly to the temperature increases of the protective device can react.
  • the holding bracket is the plastic part comprises supporting carrier plate on which a, preferably Two narrow arms are provided, over which the holder attached to the device.
  • the advantage here is that the bracket is double, so to speak supplies mechanical hold, so that now together with the already mentioned glue joint a total of three breakpoints for attachment of the new device on the device to be protected are.
  • the inventors have found that through this triple Safety also includes mechanical shocks or thermal expansion e.g. with hotplates to be protected do not lead to the fact that the new device thermally or electrically from the device solves.
  • the plastic part has a pocket in which the housing with the bottom facing outward is plugged in, and the external connection is a connection lug that is extends through the plastic part to the housing.
  • the housing only has to be clamped in the pocket so that it e.g. after pre-assembly of the holder only in the pocket must be pressed in. Furthermore, since the housing is now completely - down to the bottom - is surrounded by the plastic part good thermal insulation so that the floor heat supplied by the device to be protected completely is used to heat the temperature-dependent switch. However, this means that the new device will withstand the temperature changes follows the housing very quickly and when exceeded the specified temperature switches immediately.
  • the connecting lug is on is attached to the housing and through one in the plastic part provided slot extends outwards.
  • the terminal lug on the Plastic part is attached and - preferably resiliently the housing inserted into the bag.
  • the holding bracket is made of metal is made and preferably has an earth connection.
  • the device to be protected is advantageous, the metal bracket can now be welded on while holding a bracket screwed or glued plastic, what takes significantly more time. In addition, guaranteed a metal bracket a better mechanical Hold as a plastic bracket.
  • the bracket then usually has an earth connection to meet the relevant safety regulations will.
  • the plastic part is on the bracket is molded.
  • the advantage here is that with a single operation, namely the molding of the plastic part, two more at the same time Manufacturing steps are done with, namely fastening of the plastic part on the bracket and fastening the connecting lug on the plastic part.
  • Fig. 1 denotes a new device, the Arrangement on an electrical device 11 to be protected schematically is indicated, the device 10 itself in one first embodiment in a sectional side view you can see.
  • the device 10 comprises a bracket 14 which is attached to its each end has a narrow boom 15, the Feet 16 at isolated holding points 17 of the device 11 e.g. by Welding are attached.
  • a wider one extends between the narrow arms 15 Carrier plate 18, which carries a molded plastic part 19.
  • the switch 22 has a housing 23 preferably made of metal and lies with its cover 24 in contact with an inner end 25 of a connecting lug 26, which extends zigzag through the plastic part 19 and is held firmly by it.
  • the terminal lug 26 forms an outer terminal 27 of both the device 10 and the Device 11.
  • the bracket 14 itself is made of metal, which is why Ground connection 31 in the form of a bent tab 32 is provided to ground the bracket 14 and thus the Safety regulations especially for electrical household appliances to comply.
  • At 34 is yet another external connection of the electrical device 11 shown.
  • the electrical device Hot plate with thick film heating is what is called a heating resistor 35 should be hinted at.
  • the tab 32 is punched out 37 of the carrier plate 18 lies, that is, in one piece with the carrier plate is made.
  • Another punched-out 38, the cutting limit is dashed at 39 is indicated, is in the area of the connecting lug 26 and to recognize the plastic part 19.
  • the bracket 14 are the outer contours as well the punched-out 37, 38 cut out, whereupon the Cantilevers 15 are bent with the feet 16 accordingly, as can be seen in Fig. 1.
  • connection flag 26 as angled as shown in FIG. 1 in a side view is recognizable.
  • plastic part 19 is molded on, whereby the terminal lug 26 is an integral part of the plastic part 14 becomes and with its inner free end 25 in the pocket 21 comes to rest.
  • FIG. 3 is a representation similar to FIG. 1 Another embodiment of a new device 10 'shown. 3 is initially clearer to recognize that the switch 22 is a two-part housing 23 Metal, with a first terminal 51 on the Bottom 28 is formed while a second connection contact 52 is formed on a metal cover 54 which in itself in a known manner with respect to a metal lower part 55 electrically is isolated. For the electrical connection between the Metal cover 54 and the metal lower part 55 ensures in a known manner With a schematically indicated bimetallic switching mechanism 56 Spring washer 57 and bimetallic washer 58.
  • the spring washer 57 provides electrical Connection between metal cover 54 and metal lower part 55, so that between terminal lug 26 and bottom 28 an electrical Connection exists.
  • the temperature of the item to be protected rises Device, so the thermal coupling to the ground 28 also increases the temperature of the switch 22. Reaches that If the temperature reaches a specified value, the bimetallic disc jumps 58 in their other configuration and presses the spring washer 57 away from the metal cover 54 so that the electrical connection between terminal lug 26 and base 28 is interrupted.
  • the connecting lug 26 is now not overmolded with the plastic part 19, but sits in a slot 59, which starts from the pocket 21 extends outside.
  • the device 10 is assembled in such a way that initially the bracket 14 punched with the support plate 18 and arms 15 and preformed, whereupon the plastic part 19 is injected.
  • FIG. 4 is a top view of the new device 10 'shown in FIG. 3.

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Thermally Actuated Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)
EP97118321A 1997-02-13 1997-10-22 Commutateur dépendant de la température avec étrier de retenue Expired - Lifetime EP0859391B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19705410 1997-02-13
DE19705410A DE19705410C2 (de) 1997-02-13 1997-02-13 Temperaturabhängiger Schalter mit Haltebügel

Publications (3)

Publication Number Publication Date
EP0859391A2 true EP0859391A2 (fr) 1998-08-19
EP0859391A3 EP0859391A3 (fr) 1999-04-21
EP0859391B1 EP0859391B1 (fr) 2007-02-21

Family

ID=7820065

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97118321A Expired - Lifetime EP0859391B1 (fr) 1997-02-13 1997-10-22 Commutateur dépendant de la température avec étrier de retenue

Country Status (4)

Country Link
US (1) US5864279A (fr)
EP (1) EP0859391B1 (fr)
AT (1) ATE354860T1 (fr)
DE (1) DE19705410C2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008006385A1 (fr) * 2006-07-11 2008-01-17 Thermik Geraetebau Gmbh Capuchon de connexion et commutateur à capuchon de connexion
EP2267745A1 (fr) * 2009-06-22 2010-12-29 Marcel P. Hofsaess Capuchon pour commutateur dépendant de la température

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19938638C2 (de) * 1999-08-14 2003-04-24 Thermik Geraetebau Gmbh Übertemperaturschutzvorrichtung
US6781504B2 (en) * 2001-08-14 2004-08-24 Honeywell International, Inc. Thermal switch adapter
DE102005001371B4 (de) * 2005-01-12 2012-03-15 Marcel P. HOFSAESS Verwendung eines Anschlussübertopfes sowie Schalter mit einem Anschlussübertopf
US7808363B1 (en) * 2008-01-22 2010-10-05 Cantalice John J Overheat protection for pump
DE102009039948A1 (de) * 2009-08-27 2011-03-03 Hofsaess, Marcel P. Temperaturabhängiger Schalter
DE102013108508A1 (de) * 2013-08-07 2015-02-12 Thermik Gerätebau GmbH Temperaturabhängiger Schalter
DE102023107383B3 (de) * 2023-03-23 2024-05-29 Marcel P. HOFSAESS Aufnahmevorrichtung für einen temperaturabhängigen Schalter sowie Anordnung mit einer solchen Aufnahmevorrichtung
DE102023107382B3 (de) * 2023-03-23 2024-05-29 Marcel P. HOFSAESS Aufnahmevorrichtung für einen temperaturabhängigen Schalter sowie Anordnung mit einer solchen Aufnahmevorrichtung

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB894142A (en) * 1959-07-25 1962-04-18 Graviner Manufacturing Co Improvements in or relating to temperature responsive switches
AT350302B (de) * 1975-10-31 1979-05-25 Electrovac Vorrichtung zur befestigung thermischer schalter
US4297668A (en) * 1980-02-13 1981-10-27 Therm-O-Disc, Incorporated Thermostat with bracket for attachment to a tubular member
DE3817080A1 (de) * 1987-06-06 1988-12-15 Hanning Elektro Werke Temperaturueberwachungseinrichtung fuer spaltpolmotoren
DE8708064U1 (de) * 1987-06-06 1987-10-15 Hanning Elektro-Werke GmbH & Co, 4811 Oerlinghausen Temperaturüberwachungseinrichtung für Spaltpolmotoren
US5011101A (en) * 1987-11-02 1991-04-30 Whirlpool Corporation Surface mounting spring clip
US4812624A (en) * 1987-12-28 1989-03-14 General Electric Company Temperature sensor assembly for an automatic surface unit
DE3904463C2 (de) * 1989-02-15 1996-10-31 Stiebel Eltron Gmbh & Co Kg Elektrischer Heißwasserbereiter
DE4142180C1 (fr) * 1991-12-20 1993-07-15 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt, De
DE4345350C2 (de) * 1993-10-30 1997-05-22 Hofsaes Geb Zeitz Ulrika Temperaturabhängiger Schalter sowie Verfahren für dessen Herstellung
ES2139963T3 (es) * 1995-03-03 2000-02-16 Marcel Hofsass Caja aislante.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008006385A1 (fr) * 2006-07-11 2008-01-17 Thermik Geraetebau Gmbh Capuchon de connexion et commutateur à capuchon de connexion
EP2267745A1 (fr) * 2009-06-22 2010-12-29 Marcel P. Hofsaess Capuchon pour commutateur dépendant de la température
US8284011B2 (en) 2009-06-22 2012-10-09 Hofsaess Marcel P Cap for a temperature-dependent switch

Also Published As

Publication number Publication date
EP0859391A3 (fr) 1999-04-21
DE19705410A1 (de) 1998-08-20
EP0859391B1 (fr) 2007-02-21
DE19705410C2 (de) 1999-02-11
US5864279A (en) 1999-01-26
ATE354860T1 (de) 2007-03-15

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