EP0907196A1 - Thermostat mit hoher Betriebssicherheit zur Einstellung der Temperatur in elektrischen Geräten - Google Patents

Thermostat mit hoher Betriebssicherheit zur Einstellung der Temperatur in elektrischen Geräten Download PDF

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Publication number
EP0907196A1
EP0907196A1 EP98118378A EP98118378A EP0907196A1 EP 0907196 A1 EP0907196 A1 EP 0907196A1 EP 98118378 A EP98118378 A EP 98118378A EP 98118378 A EP98118378 A EP 98118378A EP 0907196 A1 EP0907196 A1 EP 0907196A1
Authority
EP
European Patent Office
Prior art keywords
thermostat
electric apparatus
temperature
adjusting temperature
membrane
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Withdrawn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
EP98118378A
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English (en)
French (fr)
Inventor
Antonio Pollina
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.)
PRODIGY ITALIANA Srl
Original Assignee
PRODIGY ITALIANA Srl
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 PRODIGY ITALIANA Srl filed Critical PRODIGY ITALIANA Srl
Publication of EP0907196A1 publication Critical patent/EP0907196A1/de
Withdrawn legal-status Critical Current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
    • H01H37/36—Thermally-sensitive members actuated due to expansion or contraction of a fluid with or without vaporisation

Definitions

  • the present invention relates to a thermostat for adjusting temperature in electric apparatus or appliances.
  • Thermostat for adjusting temperature in apparatus in general and, in particular, in electric apparatus or appliances, provided with a temperature measurement probe for adjusting or controlling the thermostat elements are already known.
  • said probe holds a liquid therein, which changes its volume depending on the temperature being measured.
  • a capillary element is in turn coupled to a membrane, usually arranged inside the thermostat and affecting, through suitable volume variation transmitting means, the thermostat electric contacts.
  • the aim of the present invention is to provide a thermostat for adjusting temperature in electric apparatus and appliances which is very reliable in operation and has a very small size.
  • a main object of the present invention is to provide such a thermostat assuring a perfect insulation of the mechanical parts and electrical parts thereof.
  • Another object of the present invention is to provide such a thermostat which can be adjusted on a desired operating temperature in a very easy and accurate manner.
  • Yet another object of the present invention is to provide such a thermostat comprising reduced cost thermostat components.
  • a thermostat for controlling temperature in electric apparatus of the type including, inside a box-like body, a membrane, coupled to a liquid holding probe which changes the volume thereof as the temperature changes, characterized in that said thermostat comprises moreover a rocking element supporting transmitting means for transmitting the volume variation of said membrane to a metal blade element, thereby resiliently driving, depending on said temperature depending volume variation, said blade element from a first position, in which an input terminal and an output terminal are electrically connected to one another, to a second position, in which said blade element is not electrically coupled to said first terminal.
  • said blade element in said second position, provides an electrical connection between said input terminal and a second output terminal.
  • the means for transmitting the volume variation of the membrane to said metal blade comprise a non electrically conductive material pad, rigid with said rocking element, said rocking element being directly pivoted to said box-like body.
  • the thermostat comprises an insulating diaphragm separating, inside said box-like body, the electric parts from the mechanical part thereof, and being provided with a hole for allowing said non conductive material pad to pass therethrough, said rocking element including moreover a resilient fork element, the legs of which bear on said diaphragm, in order to cause it to be resiliently recovered.
  • the thermostat further comprises a small driving shaft, to which said membrane is pivoted, and which can be operated in order to adjust the thermostat operating temperature, by changing the position of said membrane with respect to said rocking element.
  • the thermostat according to the present invention can be made both as a simple thermostat, i.e. a thermostat designed for switching on and off an electric connection to an electric apparatus, as the temperature being monitored exceeds a threshold temperature value, and as a switching or commutating element, adapted to actuate an alternative device.
  • the thermostat according to the invention generally indicated by the reference number 1 comprises a box-like body, including a box element 4 and a base element 7, coupled to one another by coupling screws or other like coupling means, and holding in its inside a membrane 6.
  • said membrane 6 is provided with a capillary transmitting tube 17, and being moreover coupled to a temperature sensing or detecting probe 3, said probe holding therein a liquid the volume of which changes depending on the temperature.
  • the membrane 6 contacts a rocking element 8, which can perform a rocking movement, since it is pivoted to the body of the box element 4 at one of the end portions thereof, without any additional pivot pin.
  • the rocking element 8 comprises two side wings, operating as fulcrum elements, and which are engaged, with a plug-in type of connection, in corresponding contoured slots formed in the body of the box element 4.
  • This solution allows to omit a pivot pin, thereby allowing a remarkable material saving as well as an easier assembling.
  • the rocking element 8 supports a pad 12, made of a non conductive material, which is provided for contacting a resilient metal blade element 14, allowing the input terminal 26 to be connected to at least one of the output terminals 27, 28.
  • said blade element 14 is provided, at one end portion thereof, with a double contact 45; two output electric contacts, rigid with said terminals 27 and 28 being moreover provided.
  • said fork comprising two metal elements, having resilient properties, contacting a diaphragm 47, departing the box-like element 4 and base 7 holding the electric parts.
  • the diaphragm 47 is moreover provided with a hole 48 allowing the pad 12 to pass therethrough, in order to allow it to contact said blade element 14.
  • the thermostat according to the present invention operates as follows.
  • the blade element 14 will contact the second output terminal 28, thereby operating a second device, such as a fan or the like.
  • the pad 12 will be disengaged from the blade element 14 which, because of a curved portion 20 thereof operating as a resilient spring, will snap recover to its position on the output terminal 26, thereby actuating the previously switched off electric apparatus and possibly switching off, in the case of a commutator operation, the second output terminal and the apparatus connected to the latter.
  • said blade element 14 is provided, at a middle portion thereof, with the mentioned curved portion 20, the concavity thereof faces the terminals 26, 27 and 28, and being rigidly connected to the input terminal 26 by one of its end portions, thereby allowing said blade element to resiliently return to its starting position.
  • the thermostat according to the invention is moreover provided with a driving small shaft 5 to which said membrane 6 is pivoted, and which will allow to manually adjust the spacing of the membrane 6 from the rocking element 8.
  • the input terminal 26 and support of the blade element 14 are made as a single-piece.
  • the disclosed thermostat owing to its small size and constructional simplicity, can be made with a very high constructional precision, thereby providing a very reliable operation.

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Thermally Actuated Switches (AREA)
  • Thermistors And Varistors (AREA)
EP98118378A 1997-10-01 1998-09-29 Thermostat mit hoher Betriebssicherheit zur Einstellung der Temperatur in elektrischen Geräten Withdrawn EP0907196A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI970702 IT237943Y1 (it) 1997-10-01 1997-10-01 Termostato,ad elevata affidabilita',per la regolazione dellatemperatura in apparecchiature elettriche
ITMI970702U 1997-10-01

Publications (1)

Publication Number Publication Date
EP0907196A1 true EP0907196A1 (de) 1999-04-07

Family

ID=11376627

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98118378A Withdrawn EP0907196A1 (de) 1997-10-01 1998-09-29 Thermostat mit hoher Betriebssicherheit zur Einstellung der Temperatur in elektrischen Geräten

Country Status (2)

Country Link
EP (1) EP0907196A1 (de)
IT (1) IT237943Y1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103441035A (zh) * 2013-08-25 2013-12-11 何兆来 无源可调温度控制开关

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3729605A (en) * 1971-01-12 1973-04-24 Danfoss As Pressure-responsive electric switch
US4163129A (en) * 1977-05-09 1979-07-31 Ranco Incorporated Condition responsive control switch units
GB2034522A (en) * 1978-11-07 1980-06-04 Ranco Inc Manually resettable thermal switch unit
FR2490003A1 (fr) * 1980-09-05 1982-03-12 Thomson Brandt Interrupteur electrique thermostatique
US4565989A (en) * 1982-10-21 1986-01-21 E.G.O. Elektro-Gerate Blanc U. Fischer Temperature control apparatus
EP0274459A2 (de) * 1987-01-09 1988-07-13 Prodigy Italiana S.R.L. Thermostat zur Überwachung des Betriebs eines Geräts im allgemeinen
US5029303A (en) * 1988-12-31 1991-07-02 E.G.O. Elektro-Gerate Blanc U. Fischer Switching device
EP0822567A2 (de) * 1996-07-30 1998-02-04 Firt S.r.l. Steuerthermostat für ein in Temperaturzyklen arbeitendes Gerät

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3729605A (en) * 1971-01-12 1973-04-24 Danfoss As Pressure-responsive electric switch
US4163129A (en) * 1977-05-09 1979-07-31 Ranco Incorporated Condition responsive control switch units
GB2034522A (en) * 1978-11-07 1980-06-04 Ranco Inc Manually resettable thermal switch unit
FR2490003A1 (fr) * 1980-09-05 1982-03-12 Thomson Brandt Interrupteur electrique thermostatique
US4565989A (en) * 1982-10-21 1986-01-21 E.G.O. Elektro-Gerate Blanc U. Fischer Temperature control apparatus
EP0274459A2 (de) * 1987-01-09 1988-07-13 Prodigy Italiana S.R.L. Thermostat zur Überwachung des Betriebs eines Geräts im allgemeinen
US5029303A (en) * 1988-12-31 1991-07-02 E.G.O. Elektro-Gerate Blanc U. Fischer Switching device
EP0822567A2 (de) * 1996-07-30 1998-02-04 Firt S.r.l. Steuerthermostat für ein in Temperaturzyklen arbeitendes Gerät

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103441035A (zh) * 2013-08-25 2013-12-11 何兆来 无源可调温度控制开关

Also Published As

Publication number Publication date
ITMI970702U1 (it) 1999-04-01
IT237943Y1 (it) 2000-09-29

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