EP0187232A2 - Thermostat - Google Patents

Thermostat Download PDF

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Publication number
EP0187232A2
EP0187232A2 EP85114597A EP85114597A EP0187232A2 EP 0187232 A2 EP0187232 A2 EP 0187232A2 EP 85114597 A EP85114597 A EP 85114597A EP 85114597 A EP85114597 A EP 85114597A EP 0187232 A2 EP0187232 A2 EP 0187232A2
Authority
EP
European Patent Office
Prior art keywords
bimetallic
temperature switch
piston
switch according
following
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.)
Withdrawn
Application number
EP85114597A
Other languages
German (de)
English (en)
Other versions
EP0187232A3 (fr
Inventor
Hugo Tippmann
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.)
Mannesmann VDO AG
Original Assignee
Mannesmann VDO AG
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 Mannesmann VDO AG filed Critical Mannesmann VDO AG
Publication of EP0187232A2 publication Critical patent/EP0187232A2/fr
Publication of EP0187232A3 publication Critical patent/EP0187232A3/fr
Withdrawn legal-status Critical Current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
    • 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
    • H01H37/521—Thermally-sensitive members actuated due to deflection of bimetallic element comprising a plurality of bimetals acting in the same direction

Definitions

  • the invention relates to a temperature switch with an expansion part, which is supported against a pivotable contact arm of a switching device.
  • a temperature switch is described for example in DE-PS 24 44 931.
  • a gas, a liquid or wax is provided in the expansion part.
  • the expansion of this material by heat leads to a pushing of a plunger against a rocker switch of a switching device and thus to a switching of the temperature switch.
  • the expansion part is sealed off from the piston and the switch housing by a membrane. This makes the temperature switch complicated in construction and therefore relatively expensive to manufacture.
  • Temperature switches with a simpler design have differently shaped bimetal strips as expansion parts. These strips are simple to manufacture, but have the disadvantage that they are very sensitive to vibrations. This makes them unsuitable for the harsh operating conditions prevailing in a motor vehicle.
  • the invention has for its object to design a temperature switch of the type mentioned in such a way that it is as simple as possible in construction, but nevertheless switches precisely and reliably even when vibrations occur.
  • the expansion part is formed by a plurality of bimetal disks lying one on top of the other in the manner of a plate spring.
  • the temperature switch according to the invention has a significantly lower hysteresis than switches with wax, gas or liquid. Due to the fact that several disc springs form the expansion part in pairs one on top of the other, large actuating forces are generated, so that the temperature switch can be designed without great structural effort so that vibrations have no influence on its function.
  • the disks do not necessarily have to be round. It is crucial that they are arched and lie on top of each other in pairs. However, the temperature switch is particularly simple if the bimetal disks are plate-shaped.
  • Another, advantageous embodiment of the invention consists in that a spacer ring is arranged between the bimetallic disks enclosing a convex space, against which the two disks rest with their edge region.
  • the temperature switch according to the invention can be designed as a conventional temperature switch with respect to the switching device if the bimetallic washers in a cylindrical switch housing are supported on the one hand against the bottom of the switch housing and on the other hand against an axially displaceable piston which rests with a plunger against the contact arm.
  • a compression spring is arranged which prestresses the piston against the bimetallic disks. This compression spring exerts a counterforce on the bimetallic discs so that they cannot move in the switching direction due to inertia forces.
  • the temperature switch becomes particularly insensitive to vibration if the compression spring has a spring force that is a multiple of the weight of the piston, the bimetal washers and spacer rings.
  • the adjustment of the temperature switch is particularly simple if the bimetallic disc on the bottom rests with its convex side against the bottom of the switch housing and the bottom has a central indentation for adjusting the switching point. Tolerances can easily be compensated by indentations of different strengths.
  • the temperature switch shown in the figures which has been positioned in FIG. 1, has a switching device 2 in the upper area of a switch housing 1 and an expansion part 3 in the lower area.
  • the switching device 2 has a fixed contact 4 and a movable contact 5 on a contact arm 6 on.
  • the fixed contact 4 is provided on a contact lug 7 which is led out of the switch housing 1.
  • a contact lug 8 which is led further out of the switch housing 1 carries one end of the contact arm 6 in the interior of the temperature switch.
  • the design of the expansion part 3 is important for the invention.
  • This consists of a total of seven bimetal disks 9 - 15 and three spacer rings 16, 17, 18.
  • the bimetal disks 9 - 15 are in the manner of a plate spring alternately with their curvature upwards or arranged below. Between the bimetallic disks 10, 11; 12, 13; 14, 15 one of the spacer rings 16, 17, 18 is provided.
  • the bottom bimetallic disc 15 lies with its downward curvature against an indentation 19 in the base 20 of the switch housing 1.
  • a compression spring 23 is supported against the piston 21 from the side of the switching device 2 and, on the other hand, bears against a disk 24 fixed to the housing.
  • the piston 21 penetrates this disc 24 and can pivot the contact arm 6 with a plunger 25.
  • the bimetallic washers As shown in FIG. 1, are flat and the plunger 25 is at a distance from the contact arm 6. The temperature switch is thereby in the open position.
  • the bimetallic disks 9 - 15 heat up, they bulge and take the form of spring plates, which can be seen in FIG. 2.
  • the piston 21 is raised against the force of the compression spring 23, so that the plunger 25 can come against the contact arm 6 and the temperature switch thereby closes.

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Thermally Actuated Switches (AREA)
EP85114597A 1985-01-09 1985-11-16 Thermostat Withdrawn EP0187232A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3500480 1985-01-09
DE19853500480 DE3500480A1 (de) 1985-01-09 1985-01-09 Temperaturschalter

Publications (2)

Publication Number Publication Date
EP0187232A2 true EP0187232A2 (fr) 1986-07-16
EP0187232A3 EP0187232A3 (fr) 1988-07-27

Family

ID=6259478

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85114597A Withdrawn EP0187232A3 (fr) 1985-01-09 1985-11-16 Thermostat

Country Status (2)

Country Link
EP (1) EP0187232A3 (fr)
DE (1) DE3500480A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7663467B2 (en) * 2005-11-07 2010-02-16 Chia-Yi Hsu Manually resettable thermostat
WO2012004197A1 (fr) * 2010-07-05 2012-01-12 Stego-Holding Gmbh Régulateur bilame
EP1849032B1 (fr) * 2005-02-14 2012-12-19 SAGEM Défense Sécurité Dispositif d'actionnement a rondelles bilames
EP2650898A1 (fr) * 2012-04-10 2013-10-16 Elektronik Werkstätte Ing. Wurmb Ges.m.b.H. Procédé de fabrication d'un commutateur électrique thermosensible doté d'un boîtier formant une unité mobile avec un guidage de tige et un commutateur électrique thermosensible

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103515146A (zh) * 2013-09-29 2014-01-15 扬州宝珠电器有限公司 纽扣式温度电流触发器

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2230770A (en) * 1939-12-09 1941-02-04 Cons Car Heating Co Inc Circuit controller
FR2246050A1 (en) * 1973-09-28 1975-04-25 Jaeger Thermostatic switch with cambering diaphragms - uses temp responsive diaphragm motions for switch actuation
FR2266278A1 (fr) * 1974-03-29 1975-10-24 Behr Thomson Dehnstoffregler
US4325047A (en) * 1980-04-09 1982-04-13 Aisin Seiki Kabushiki Kaisha Temperature responsive switch
EP0055060A1 (fr) * 1980-12-15 1982-06-30 Deere & Company Dispositif d'actionnement thermique à éléments multiples
US4350967A (en) * 1979-11-01 1982-09-21 Texas Instruments Incorporated Two-temperature thermally responsive fast idle control switch
US4445105A (en) * 1982-06-28 1984-04-24 Portage Electric Products, Inc. Thermostat

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2230770A (en) * 1939-12-09 1941-02-04 Cons Car Heating Co Inc Circuit controller
FR2246050A1 (en) * 1973-09-28 1975-04-25 Jaeger Thermostatic switch with cambering diaphragms - uses temp responsive diaphragm motions for switch actuation
FR2266278A1 (fr) * 1974-03-29 1975-10-24 Behr Thomson Dehnstoffregler
US4350967A (en) * 1979-11-01 1982-09-21 Texas Instruments Incorporated Two-temperature thermally responsive fast idle control switch
US4325047A (en) * 1980-04-09 1982-04-13 Aisin Seiki Kabushiki Kaisha Temperature responsive switch
EP0055060A1 (fr) * 1980-12-15 1982-06-30 Deere & Company Dispositif d'actionnement thermique à éléments multiples
US4445105A (en) * 1982-06-28 1984-04-24 Portage Electric Products, Inc. Thermostat

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1849032B1 (fr) * 2005-02-14 2012-12-19 SAGEM Défense Sécurité Dispositif d'actionnement a rondelles bilames
US7663467B2 (en) * 2005-11-07 2010-02-16 Chia-Yi Hsu Manually resettable thermostat
WO2012004197A1 (fr) * 2010-07-05 2012-01-12 Stego-Holding Gmbh Régulateur bilame
CN102959671A (zh) * 2010-07-05 2013-03-06 斯特格控股有限公司 双金属控制器
CN102959671B (zh) * 2010-07-05 2016-03-30 斯特格控股有限公司 双金属控制器
EA023533B1 (ru) * 2010-07-05 2016-06-30 Штего-Холдинг Гмбх Биметаллический переключатель
US10332706B2 (en) 2010-07-05 2019-06-25 Stego-Holding Gmbh Bimetal controller
EP2650898A1 (fr) * 2012-04-10 2013-10-16 Elektronik Werkstätte Ing. Wurmb Ges.m.b.H. Procédé de fabrication d'un commutateur électrique thermosensible doté d'un boîtier formant une unité mobile avec un guidage de tige et un commutateur électrique thermosensible

Also Published As

Publication number Publication date
DE3500480A1 (de) 1986-07-10
EP0187232A3 (fr) 1988-07-27

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Inventor name: TIPPMANN, HUGO