EP0226663A1 - Thermostat - Google Patents

Thermostat Download PDF

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Publication number
EP0226663A1
EP0226663A1 EP85201824A EP85201824A EP0226663A1 EP 0226663 A1 EP0226663 A1 EP 0226663A1 EP 85201824 A EP85201824 A EP 85201824A EP 85201824 A EP85201824 A EP 85201824A EP 0226663 A1 EP0226663 A1 EP 0226663A1
Authority
EP
European Patent Office
Prior art keywords
thermostat
temperature
pins
contact
switch
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Withdrawn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
EP85201824A
Other languages
English (en)
French (fr)
Inventor
Philip Maurits Gerson
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.)
Texas Instruments Holland BV
Original Assignee
Texas Instruments Holland BV
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 Texas Instruments Holland BV filed Critical Texas Instruments Holland BV
Priority to EP85201824A priority Critical patent/EP0226663A1/de
Priority to JP26541186A priority patent/JPS62165824A/ja
Publication of EP0226663A1 publication Critical patent/EP0226663A1/de
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H61/00—Electrothermal relays
    • H01H61/02—Electrothermal relays wherein the thermally-sensitive member is heated indirectly, e.g. resistively, inductively
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/12—Means for adjustment of "on" or "off" operating temperature
    • H01H37/14—Means for adjustment of "on" or "off" operating temperature by anticipatory electric heater
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • H01H1/504—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by thermal means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H81/00—Protective switches in which contacts are normally closed but are repeatedly opened and reclosed as long as a condition causing excess current persists, e.g. for current limiting
    • H01H81/02—Protective switches in which contacts are normally closed but are repeatedly opened and reclosed as long as a condition causing excess current persists, e.g. for current limiting electrothermally operated

Definitions

  • the present invention relates to a thermostat comprising a bimetal switch element reacting upon temperatures, which on one of its ends is fastened on a frame and on the other end is provided with an electric contact adapted to engage a fixed contact provided on the frame, said frame comprising two mutually parallel sheet-like metallic contact carriers forming a base unit, through which two parallel pins are extending for connection of both contact carriers and on which pins the contact carriers, with a tight fit, are slidable to and fro one another and permanent mutually parallel during mounting, which thermostat may be provided with an external heating means, an internal heating means, a heat capacity, as well as various embodiments of connecting terminals for the contact carriers.
  • thermostats A number of embodiments of said thermostat are shown, influencing the current sensibility and/or the times of switching it on and off, and/or connection and mounting possibilities.
  • an external heating element that is fed by the current to be switched, possibly arranged in or on a heat capacity
  • contact carriers one of which or both being made in a resistance material, possibly combined with a special confi­guration of said carriers and/or an additional heat capacity.
  • a drawback of this structure is that an additional compo­nent (requiring additional space) and contact-making means have to be added, whilst special care should be bestowed on stability, for instance in the event of vibrations. It is a further drawback that in the automatic reset function, that is without an additional heat source connected in parallel, the switch-back times highly depend upon the ambient temperature, and the range of switch-back times is restricted i.e. by the difference between the switch-back temperature and the ambient temperature.
  • the invention tends to abolish the above indicated drawbacks and for that purpose it is characterized in that at least one of the pins is made of PTC-material, from which pins, when energized, electri­cally generated heat can be transferred by conduction, convection and radiation to the temperature sensitive switching element of the thermostat.
  • One, or both, pins can be made of a PTC-material with a predetermined Curie-temperature with which a simple, solid structure is obtained. Heat generated in this or these PTC pins is transferred by radiation, conduction and convection to the switching member of the thermostat. Because of the close construction of the device the Curie-temperature of the PTC pin, when energized, determines mainly the temperature of the switching member. At lower ambient temperatures it creates an artificial direct ambient tempe­rature. When the Curie-temperature of the PTC pin is chosen in such a way that this artificial direct ambient temperature lies between the switch-off and switch-on temperature of the thermostat, the latter cannot switch back again when the ambient temperature falls.
  • one of said pins is made of PTC-material, security is given in case, upon short-circuiting of the pin, the latterwouldburn.
  • the other pin made of an insulating material, maintains the function of the thermostat and the mechanical structure of the whole.
  • the base unit 1 comprises two mutually parallel, sheet-like contact carriers 2 and 3 which, with a tight fit, are fastened on two parallel pins 4 and 5, one pin or both pins thereof being made of PTC-material.
  • the pins extend through two deep-drawn holes in the contact carriers.
  • the contact carriers are slidable on the pins to and fro one another and mutually parallel during the composition and adjustment of the thermostat.
  • Each contact carrier comprises connecting terminals 6, 6 which are provided on opposite ends of the base unit and are capitad to one another and extend in longitu­dinal direction of the base unit.
  • the switch element consists of a bimetal and comprises a setting which enables independent switching with a snap action at a determined switch-on temperature and switches back at a lower temperature.
  • the setting is circular in the shown embodiment, however, it may have another shape too.
  • the switch element comprises on its movable end a contact 10 adapted to engage a fixed contact 11 fastened on the inner side of the other contact carrier.
  • the contact carriers may have any configuration. For instance they can have an aperture 12 as illustrated in fig. 1 for laterally exposing almost the entire switch element 7. Furthermore each contact carrier can be made of a resistance material by which the current sensibility is increased.
  • the contact carriers can be made of the same material or of two different materials.
  • a contact can consist of three layers, for instance of Ni, Cu, Ag(Cdo). It is also possible that the switch element has not been provided with a setting.
  • the connection termi­nals can be also have various configurations and positions, and a heat well can be used as well as the external or an internal heating means.

Landscapes

  • Thermally Actuated Switches (AREA)
EP85201824A 1985-11-08 1985-11-08 Thermostat Withdrawn EP0226663A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP85201824A EP0226663A1 (de) 1985-11-08 1985-11-08 Thermostat
JP26541186A JPS62165824A (ja) 1985-11-08 1986-11-07 サ−モスタツト

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP85201824A EP0226663A1 (de) 1985-11-08 1985-11-08 Thermostat

Publications (1)

Publication Number Publication Date
EP0226663A1 true EP0226663A1 (de) 1987-07-01

Family

ID=8194078

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85201824A Withdrawn EP0226663A1 (de) 1985-11-08 1985-11-08 Thermostat

Country Status (2)

Country Link
EP (1) EP0226663A1 (de)
JP (1) JPS62165824A (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0756302A2 (de) * 1995-07-26 1997-01-29 Thermik Gerätebau GmbH Nach dem Baukastenprinzip aufgebauter Temperaturwächter
EP0779043A1 (de) * 1995-12-14 1997-06-18 Magic Dreams Cosmetica Infantil, S.L. Gerät zum Aufwärmen von Enthaarungswachs
EP0250601B2 (de) † 1985-12-26 2003-07-02 Mitsui Chemicals, Inc. Katalysator für die polymerisation von alpha-olefinen
WO2005073996A1 (en) * 2004-01-30 2005-08-11 Danfoss Compressors Gmbh A bimetal protector
CN106952779A (zh) * 2017-05-12 2017-07-14 佛山市高明欧电子制造有限公司 一种带ptc断电复位的温控装置
CN109449047A (zh) * 2018-10-26 2019-03-08 佛山市欧电器制造厂有限公司 一种稳固性能好的带ptc断电复位温控装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2585148B2 (ja) * 1991-04-05 1997-02-26 ウチヤ・サーモスタット株式会社 フィルム状発熱体内蔵型サーモスタット
JP2585164B2 (ja) * 1992-07-07 1997-02-26 ウチヤ・サーモスタット株式会社 サーモプロテクタ

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2113388A1 (de) * 1970-03-26 1971-10-14 Texas Instruments Inc Thermostat
EP0114071A2 (de) * 1983-01-15 1984-07-25 Fritz Eichenauer GmbH & Co. KG Temperaturwächter
EP0128978A1 (de) * 1983-06-20 1984-12-27 Texas Instruments Holland B.V. Thermostat

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2113388A1 (de) * 1970-03-26 1971-10-14 Texas Instruments Inc Thermostat
EP0114071A2 (de) * 1983-01-15 1984-07-25 Fritz Eichenauer GmbH & Co. KG Temperaturwächter
EP0128978A1 (de) * 1983-06-20 1984-12-27 Texas Instruments Holland B.V. Thermostat

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0250601B2 (de) † 1985-12-26 2003-07-02 Mitsui Chemicals, Inc. Katalysator für die polymerisation von alpha-olefinen
EP0756302A2 (de) * 1995-07-26 1997-01-29 Thermik Gerätebau GmbH Nach dem Baukastenprinzip aufgebauter Temperaturwächter
EP0756302A3 (de) * 1995-07-26 1998-06-03 Thermik Gerätebau GmbH Nach dem Baukastenprinzip aufgebauter Temperaturwächter
EP0779043A1 (de) * 1995-12-14 1997-06-18 Magic Dreams Cosmetica Infantil, S.L. Gerät zum Aufwärmen von Enthaarungswachs
WO2005073996A1 (en) * 2004-01-30 2005-08-11 Danfoss Compressors Gmbh A bimetal protector
CN106952779A (zh) * 2017-05-12 2017-07-14 佛山市高明欧电子制造有限公司 一种带ptc断电复位的温控装置
CN109449047A (zh) * 2018-10-26 2019-03-08 佛山市欧电器制造厂有限公司 一种稳固性能好的带ptc断电复位温控装置
CN109449047B (zh) * 2018-10-26 2020-02-18 佛山市欧一电器制造厂有限公司 一种稳固性能好的带ptc断电复位温控装置

Also Published As

Publication number Publication date
JPS62165824A (ja) 1987-07-22

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19861205

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

17Q First examination report despatched

Effective date: 19871117

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19890124

RIN1 Information on inventor provided before grant (corrected)

Inventor name: GERSON, PHILIP MAURITS