EP0822567A2 - Thermostat de commande pour un appareil fonctionnant en cycles thermiques - Google Patents

Thermostat de commande pour un appareil fonctionnant en cycles thermiques Download PDF

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Publication number
EP0822567A2
EP0822567A2 EP96830586A EP96830586A EP0822567A2 EP 0822567 A2 EP0822567 A2 EP 0822567A2 EP 96830586 A EP96830586 A EP 96830586A EP 96830586 A EP96830586 A EP 96830586A EP 0822567 A2 EP0822567 A2 EP 0822567A2
Authority
EP
European Patent Office
Prior art keywords
thermostat
electric contact
plenum chamber
resilient blade
coupled
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Withdrawn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
EP96830586A
Other languages
German (de)
English (en)
Other versions
EP0822567A3 (fr
Inventor
Giancarlo c/o First S.r.l. Camerlenghi
Pietro c/o Firt S.r.l. Maronati
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.)
Firt Srl
Original Assignee
Firt 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 Firt Srl filed Critical Firt Srl
Publication of EP0822567A2 publication Critical patent/EP0822567A2/fr
Publication of EP0822567A3 publication Critical patent/EP0822567A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
    • H01H35/26—Details
    • 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 control thermostat for apparatus operating by/on thermal cycles.
  • thermostatic elements for controlling the operation of said apparatus, the thermostatic element comprising, as a sensing element therefor, an expansible plenum chamber coupled to a liquid holding probe, the volume of the probe liquid changing as the temperature changes.
  • thermostatic elements have a large size, thereby these thermostatic elements can be arranged with difficulties in the apparatus to be controlled thereby.
  • the aim of the present invention is to overcome the above mentioned drawbacks, by providing a control thermostat, for apparatus operating by/on thermal cycles in general, the construction of which is very simple and which, moreover, is very reliable in operation.
  • a main object of the present invention is to provide a very accurately operating thermostat.
  • Another object of the present invention is to provide such a thermostat which can be made at a comparatively low and competitive cost.
  • Yet another object of the present invention is to provide such a thermostat which is very safe and reliable in operation.
  • a control thermostat for apparatus operating by thermal cycles, characterized in that said control thermostat comprises a box-like casing housing therein an expansible plenum chamber coupled, through a capillary element, to an expanding liquid holding probe, said plenum chamber being arranged between an adjustment abutment element and a swinging lever operating a resilient blade, made of an electrically conductive material, coupled to a first electric terminal and provided with a movable electric contact designed to be driven by the movement of said resilient blade as caused by said swinging lever, so as to close and/or open an electric circuit.
  • control thermostat which has been generally indicated by the reference number 1, comprises a box-like casing 2 housing therein an expansible plenum chamber 3, which is coupled, through a capillary element or tube 4, to a probe 5, holding therein, in a vacuum condition, a liquid material, which can change its volume as the temperature changes.
  • the box-like casing 2 is closed at the top thereof by a closing cover 6, made of a synthetic material, which is snap-coupled to the body of the box-like casing.
  • the cover 6 is provided, at the bottom thereof, with fins or tabs 7 provided with a small tooth element, engaging, owing to the resilient flexibility of said fins 7, with abutment elements 8 provided near the top edge of the body of the box-like casing 2.
  • the expansible plenum chamber 3 is arranged between an adjustment abutment element 9 and a swinging lever 10.
  • the adjustment abutment element 9 can be driven, in a per se known manner, in parallel to the expanding direction of the expansible plenum chamber 3, by turning a shaft 11 thereon is supported an adjusting or control knob, which has not been shown for simplicity.
  • the lever 10 is pivoted, at a middle portion thereof, to said casing 2, and one end thereof faces the expansible plenum chamber 3, whereas the other end thereof is provided with an electrically insulating material head 12, preferably made of steatite, affecting a resilient blade 13.
  • the lever 10 is provided, at a middle region thereof, with a bend 14 the concave face of which bears on a tip 15 rigid with the casing 2, and defining the pivot pin for the lever 10.
  • the expansible plenum chamber 3 can be simply directed towards one end of the lever 10 or, as is shown in figure 2, it can be restrained or fixedly coupled to said lever 10, as the plenum chamber 3 must be operated under a pulling force, instead of a pushing force, as provided in the embodiment shown in figure 1.
  • a plate 16 is provided, said plate being held in its set position by a resilient blade 17 coupled to the casing 2.
  • the resilient blade 13 is preferably made of a berillium-copper alloy and is coupled, in a per se known manner, to an electric power supply terminal 18.
  • the resilient blade 13 in particular, is connected, at one end thereof, to said electric terminal 18 and is provided, at the other opposite end thereof, with a fixed electric contact 20 coupled to an electric terminal 21, as well as another fixed electric contact coupled to a further electric terminal 22.
  • the movable electric contact 19 abuts against the fixed electric contact 20, thereby normally closing a related electric circuit, and being disengaged from the electric contact coupled to the electric terminal 22, thereby holding a corresponding electric circuit in an open condition.
  • the control thermostat according to the present invention operates as follows.
  • the movable electric contact 19 bears on the fixed contact 20 thereby providing an electric connection between the terminal 18 and the terminal 21.
  • the resilient blade 13, as it is deflected, will cause the movable electric contact 19 to move away from the electric contact 20 and, simultaneously will bring the movable electric contact 19 to abut against the electric contact coupled to the terminal 22 thereby the latter will be electrically coupled to the electric terminal 18, alternately to the electric terminal 21.
  • the control thermostat according to the present invention is moreover characterized in that all the electric portion thereof can be preliminarily assembled on a steatite supporting socket having a very reduced size.
  • This socket in turn, will be affixed inside the box-like casing in a very simple manner, by means of a single affixing screw.
  • the used materials can be any, depending on requirements.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Thermal Sciences (AREA)
  • Thermally Actuated Switches (AREA)
  • Control Of Heat Treatment Processes (AREA)
  • Control Of Temperature (AREA)
EP96830586A 1996-07-30 1996-11-18 Thermostat de commande pour un appareil fonctionnant en cycles thermiques Withdrawn EP0822567A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT96MI000549 IT240823Y1 (it) 1996-07-30 1996-07-30 Termostato di controllo per apparecchiature a funzionamento,basatosu cicli termici
ITMI960549U 1996-07-30

Publications (2)

Publication Number Publication Date
EP0822567A2 true EP0822567A2 (fr) 1998-02-04
EP0822567A3 EP0822567A3 (fr) 1998-10-14

Family

ID=11373713

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96830586A Withdrawn EP0822567A3 (fr) 1996-07-30 1996-11-18 Thermostat de commande pour un appareil fonctionnant en cycles thermiques

Country Status (2)

Country Link
EP (1) EP0822567A3 (fr)
IT (1) IT240823Y1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0907196A1 (fr) * 1997-10-01 1999-04-07 PRODIGY ITALIANA S.r.l. Thermostat à haute fiabilité de fonctionnenement pour l'ajustement de la température des appareils électriques
CN113028192A (zh) * 2021-01-29 2021-06-25 金华送变电工程有限公司 一种用于变压器油色谱回油管路的集气装置
CN114300305A (zh) * 2021-04-13 2022-04-08 慈溪市凯达温控器有限公司 一种新型液胀式温控器及其保护装置

Citations (12)

* 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
DE2300332A1 (de) * 1973-01-04 1974-07-18 Centra Buerkle Kg Albert Schaltvorrichtung
GB1498828A (en) * 1974-03-29 1978-01-25 Behr Thomson Dehnstoffregler Electrical switch devices
GB1506681A (en) * 1975-02-07 1978-04-12 Dba Sa Fluid-pressure responsive switch
FR2369674A1 (fr) * 1977-12-13 1978-05-26 Snipeliski Jacques Perfectionnements aux dispositifs d'interrupteurs thermostatiques
EP0017572A1 (fr) * 1979-04-06 1980-10-15 Societe Electromecanique Du Nivernais - Selni Interrupteur électrique opérant en fonction de la température
DE3202512A1 (de) * 1982-01-27 1983-08-04 Willi 7120 Bietigheim-Bissingen Quitoschinger "druckgesteuerter elektrischer schalter"
FR2587540A1 (fr) * 1985-09-17 1987-03-20 Souza Sa Comercio Ind Admi Thermostat
US4698612A (en) * 1986-11-13 1987-10-06 Eaton Corporation Temperature limiting control
EP0274459A2 (fr) * 1987-01-09 1988-07-13 Prodigy Italiana S.R.L. Thermostat de contrôle de l'opération d'appareils en général
EP0381939A2 (fr) * 1989-02-10 1990-08-16 Imo Industries Gmbh Dispositif de commutation électrique
US5173679A (en) * 1992-02-25 1992-12-22 Sensors & Switches, Inc. Thermostatically controlled switch

Patent Citations (12)

* 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
DE2300332A1 (de) * 1973-01-04 1974-07-18 Centra Buerkle Kg Albert Schaltvorrichtung
GB1498828A (en) * 1974-03-29 1978-01-25 Behr Thomson Dehnstoffregler Electrical switch devices
GB1506681A (en) * 1975-02-07 1978-04-12 Dba Sa Fluid-pressure responsive switch
FR2369674A1 (fr) * 1977-12-13 1978-05-26 Snipeliski Jacques Perfectionnements aux dispositifs d'interrupteurs thermostatiques
EP0017572A1 (fr) * 1979-04-06 1980-10-15 Societe Electromecanique Du Nivernais - Selni Interrupteur électrique opérant en fonction de la température
DE3202512A1 (de) * 1982-01-27 1983-08-04 Willi 7120 Bietigheim-Bissingen Quitoschinger "druckgesteuerter elektrischer schalter"
FR2587540A1 (fr) * 1985-09-17 1987-03-20 Souza Sa Comercio Ind Admi Thermostat
US4698612A (en) * 1986-11-13 1987-10-06 Eaton Corporation Temperature limiting control
EP0274459A2 (fr) * 1987-01-09 1988-07-13 Prodigy Italiana S.R.L. Thermostat de contrôle de l'opération d'appareils en général
EP0381939A2 (fr) * 1989-02-10 1990-08-16 Imo Industries Gmbh Dispositif de commutation électrique
US5173679A (en) * 1992-02-25 1992-12-22 Sensors & Switches, Inc. Thermostatically controlled switch

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0907196A1 (fr) * 1997-10-01 1999-04-07 PRODIGY ITALIANA S.r.l. Thermostat à haute fiabilité de fonctionnenement pour l'ajustement de la température des appareils électriques
CN113028192A (zh) * 2021-01-29 2021-06-25 金华送变电工程有限公司 一种用于变压器油色谱回油管路的集气装置
CN114300305A (zh) * 2021-04-13 2022-04-08 慈溪市凯达温控器有限公司 一种新型液胀式温控器及其保护装置
CN114300305B (zh) * 2021-04-13 2024-01-19 慈溪市凯达温控器有限公司 一种液胀式温控器

Also Published As

Publication number Publication date
EP0822567A3 (fr) 1998-10-14
ITMI960549V0 (fr) 1996-07-30
ITMI960549U1 (it) 1998-01-30
IT240823Y1 (it) 2001-04-11

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