EP0005191A1 - Régulateur de température avec un interrupteur à action brusque et un élément de dilatation - Google Patents

Régulateur de température avec un interrupteur à action brusque et un élément de dilatation Download PDF

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Publication number
EP0005191A1
EP0005191A1 EP79101100A EP79101100A EP0005191A1 EP 0005191 A1 EP0005191 A1 EP 0005191A1 EP 79101100 A EP79101100 A EP 79101100A EP 79101100 A EP79101100 A EP 79101100A EP 0005191 A1 EP0005191 A1 EP 0005191A1
Authority
EP
European Patent Office
Prior art keywords
temperature controller
controller according
snap spring
spring
snap
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
EP79101100A
Other languages
German (de)
English (en)
Other versions
EP0005191B1 (fr
Inventor
Robert Kicherer
Manfred Schwarze
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.)
Cessione ego Elektrogeraete AG
Original Assignee
EGO Regeltechnik 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 EGO Regeltechnik GmbH filed Critical EGO Regeltechnik GmbH
Publication of EP0005191A1 publication Critical patent/EP0005191A1/fr
Application granted granted Critical
Publication of EP0005191B1 publication Critical patent/EP0005191B1/fr
Expired 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
    • H01H37/04—Bases; Housings; Mountings

Definitions

  • the invention relates to a temperature controller according to the preamble of claim 1.
  • a temperature limiter of this type has become known from AT-PS 201 890, which has a pot-shaped insulating housing to which the fixed contacts are attached.
  • the snap switch is mounted together with the expansion socket on a sheet metal cover which is screwed onto the insulating housing. Since the snap spring is not involved in the current transmission, both the setting member and the expansion member can act on the snap switch without intermediate insulation.
  • the snap switch and in particular the snap spring can thus be optimized for their mechanical switching tasks, so that a construction with a minimal switching hysteresis is possible.
  • the possibility of storing the snap spring is only given in cutting edge bearings, which is otherwise the case at higher currents because of the power connection to the snap spring was not possible, however, this temperature limiter is complex to build and assemble.
  • the object of the invention is to further improve such a temperature controller with regard to an even simpler, more space-saving and robust construction.
  • the switch structure is not only particularly simple and, apart from the connection block and an insulating piece on the snap spring, can only consist of sheet metal parts, but also leads to a compact design that makes it possible to have a full-fledged temperature controller with a width and height of its switch body of less than 20 mm.
  • the temperature controller 11 shown in FIGS. 1 to 3 has a snap switch 12 with a snap spring 13 and is designed as a single-pole on / off switch. However, it is also possible to provide the temperature controller with a multi-pole switch or a changeover switch.
  • the snap spring 13 consists of a strip-shaped base spring part 14 made of thin spring material, from which a spring tongue 15 is cut out by a U-shaped incision. Their free end and one end of the base spring part are supported in cutting edge bearings 16, 17, which are provided on a lever 18 arranged essentially parallel to the snap spring.
  • the cutting edge bearings 17 at the end of the base spring part extend through a slot 19 in the latter, so that the cutting edges point in the opposite direction and thus hold the base spring part.
  • An actuation pressure point 20 in the form of an expression of the base spring part is provided between the two cutting edge bearings 16, 17.
  • an insulating piece 21 is riveted, which has on its underside a contact bridge 22 which is fixed by a T-shaped rivet 23 with a slight play on the insulating piece 21. It extends transversely to the extension of the snap spring and is insulated from it.
  • the contact bridge 22 works with two fixed contacts 25 arranged side by side in an insulating body 24 and bridges them only when the snap spring is in its (lower) switched-on position.
  • connection contact parts 26 are each formed from a sheet metal strip which projects through slots in the rectangular insulating body and forms a tab for electrical connection at its end projecting from the insulating body and the temperature controller .
  • the insulating body 24 is clamped between two side parts 27, 28 made of sheet metal parts by means of a screw 29.
  • the side part 27 has the shape of a substantially flat sheet metal strip which has bevels 30 in the edge region and on which the L-shaped fastening tab 31 is cut out and bent, which carries a fastening thread 32 in a grommet drawn from the sheet metal.
  • a thread 33 is arranged, into which an adjusting screw 34 is screwed, which is connected to the rivet 23 to determine the contact distance, i.e. the possibility of movement of the snap switch cooperates when switching.
  • an adjustment thread 35 is provided, into which an adjustment shaft 36, once designed in its lower region as a screw spindle, is screwed.
  • This hollow setting shaft has a flattened portion in the part protruding vertically from the temperature controller to prevent rotation of a setting button.
  • a stop part 37 is fixed, which interacts with a stop in the form of a bent-out sheet metal tab 38 on the side part 27.
  • the setting shaft 36 also has an internal thread into which an adjusting screw 39 is screwed for the temperature adjustment.
  • the end of the adjusting screw 39 which projects inward beyond the adjusting shaft 36, presses on the lever 18 in its free area, which supports the support bearings 16, 17.
  • This lever is clamped between the side part 27 and the insulating body 24 by means of the screw 29 and is resiliently elastic in its end adjoining the clamping, while in the rest of the region it is bent by an edge fold. is stiff.
  • the lever 18 is pressed in the manner of a leaf spring in the direction of the adjusting screw 39 and is pivoted by the latter during its movement and in particular during the movement of the adjusting shaft 36.
  • the position of the snap spring in the area of its support bearing and its loading Operating point 20 changed according to the temperature adjustment and setting.
  • the operating side of the temperature controller 11 is covered by the side part 27.
  • the opposite side is covered by the side part 28, which is also in the form of a sheet metal plate stiffened by edge folds, but which is bent at its end opposite the connecting or insulating body 24 in an L-shape and thus covers the end face opposite the connecting side.
  • This L-leg 40 is connected at its free end by twisted sheet metal tabs 41, which are inserted into the side part 27 through slots.
  • the side part 28 has an inward bowl-shaped shape 42 with a central bore through which a connecting part 43 of a hydraulic expansion box 44 projects and is fixed thereon by means of a spring tension ring 49 pushed over it.
  • the expansion box 44 consists, in a known manner, of two cup-shaped sheet metal shells, one inside the other and tightly welded together in the edge area, which cause expansion in the central area due to their elasticity supported by corrugations.
  • the connection part 43 is attached, which in turn is fixed on the side part 28, while on the opposite side a pressure piece 45 is fixed by means of spot welding.
  • a capillary tube 46 which connects the expansion socket with a sensor shown schematically, projects into the connecting piece 43 and is soldered there.
  • the capillary tube runs along the outside of the side part 28 and is on the L-leg 40 for strain relief by means of a molded sheet metal tab 47
  • the housing or frame carrying the individual parts of the temperature controller is small and compact and consists predominantly of simple sheet metal stampings. There are only two simply designed insulating parts made of a ceramic material such as steatite. The controller is reliable and easy to adjust.
  • the snap spring, on the actuating pressure point 20 of which the pressure piece 45 acts, is not endangered against overpressure because it is suspended in two cutting edge bearings.
  • the two long sides, which extend between the side parts 27 and 28, that is to say the sides lying in front of and behind the plane of the drawing in FIG. 1 but parallel to this, can be covered by plates 50 made of a thin insulating material, which are separated by the edge folds the side parts 27, 28 are held.
  • the lever 18 When switching on by turning the adjusting shaft 36 to the right, the lever 18 is pivoted slightly (clockwise) (raised.) And moves the snap spring 13 away from the pressure piece 45. As a result, the snap spring 13 snaps into the switch-on position shown in FIG. 1, in which the two contacts 25 are bridged by the contact bridge 22 and thus a conductive connection between the two connecting parts 26 is present.
  • the limited mobility of the contact bridge 22 ensures that both contacts 25 are securely contacted. If expansion fluid is now conveyed through the capillary tube 46 into the expansion socket 44 by heating the sensor (not shown), this expands and the pressure piece 45 is moved in the direction of the snap spring until the snap spring returns to its initially described "pressure". Is pivoted from "position. This is repeated as often as you like.
  • a preferably short and strong bimetal possibly in a bridge construction with two supported ends and a central power take-off, can be used if the controller is to be arranged directly in the area to be sensed.
  • a cam disc mounted on a side part could also be provided if, for example, a non-linear setting characteristic is desired.
  • the screw spindle makes it possible to place the middle pressure piece of the expansion socket, the actuation point and the point of application of the screw spindle practically on one axis, without translations being necessary. In the case of an adjustment curve, a translation could be carried out by arranging or extending the lever 18 accordingly.
  • An embodiment is particularly advantageous in which the insulating piece 21 carrying the contact bridge 22 is made of creep-current-resistant plastic with which the snap spring is molded at its end. It is light in weight, so that the snap spring is due to low inertial forces can switch faster.
  • the expansion box 44 has a pressure piece 45 'with a collar on which a fork-shaped arm 51 of a double-armed lever about an axis 54 of a switch-off device is supported under the force acting on the other arm 55 of the lever spring 56.
  • an engagement part 57 in the form of a leaf spring is attached, which can be spread out by means of an adjusting screw 58 from the arm 55 of the lever.
  • the insulating piece 21 'carrying the contact bridge 22 is made of creep-current-resistant plastic with which the snap spring 13 is extrusion-coated at its free end. It has a lower weight so that the snap spring can switch faster due to lower inertia forces.
  • the switch-off device 53 is arranged in such a way that the engagement part 57 engages on the insulating piece 21 'and, despite the snap spring loaded in the switching-on direction, can keep the contacts open if the expansion socket contracts extremely far as a result of a leak in the expansion system (hydraulic sensor, capillary tube or expansion socket), as in Fig.4 is shown. The switch is therefore protected against damage to the expansion system (intrinsically safe).
  • the switch-off device 53 represents a device which is independent of the snap spring and is actuated directly by the expansion socket and which forms a stop for keeping the contacts open.
  • the insulating piece 53 or the stop part attached to it is opposite a counter stop 60, but at such a large distance that the snap spring, when expanded by the expansion box 44 into its off position jumps, abuts against the counter stop 60 and cannot be brought back into its switched-on position by pulling the expansion box together.
  • the snap spring then jumped out of its snap area.
  • the counter-stop 60 is moved towards the snap spring for reclosing.
  • the counter-stop projecting through a hole in the snap spring support 18 and the side part 27 is mushroom-shaped and projects with its shaft out of the temperature controller.
  • a one-armed spring lever 61 fastened in the region of the insulating body 24 can press with its central region onto the shaft of the counterstop 60 when its free end, which grips around the adjusting shaft in a forked manner, is pressed down by the collar 62 of an adjusting button 63, which is pressed manually against the force of one Spring 64 is axially displaceable on the adjusting shaft.
  • the temperature controller according to Fig. 4 is therefore not only intrinsically safe, but also has a limiter function that prevents automatic restart. However, the limiter temperature is adjustable.
  • the intrinsic safety feature and the dial limiter function can also be used independently.
  • the spring lever 61 can also be omitted, the restart being carried out by pressing the shaft of the counter-stop 60. In this case, for example, the housing must then be opened, which may be desirable in order to ensure that an error is rectified which has led to the overtemperature displayed.

Landscapes

  • Thermally Actuated Switches (AREA)
  • Greenhouses (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
EP79101100A 1978-04-13 1979-04-10 Régulateur de température avec un interrupteur à action brusque et un élément de dilatation Expired EP0005191B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2815987 1978-04-13
DE2815987A DE2815987C2 (de) 1978-04-13 1978-04-13 Temperaturregler

Publications (2)

Publication Number Publication Date
EP0005191A1 true EP0005191A1 (fr) 1979-11-14
EP0005191B1 EP0005191B1 (fr) 1982-05-05

Family

ID=6036872

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79101100A Expired EP0005191B1 (fr) 1978-04-13 1979-04-10 Régulateur de température avec un interrupteur à action brusque et un élément de dilatation

Country Status (14)

Country Link
US (1) US4260977A (fr)
EP (1) EP0005191B1 (fr)
JP (1) JPS5510791A (fr)
AT (1) AT376060B (fr)
AU (1) AU523467B2 (fr)
BR (1) BR7902256A (fr)
DE (1) DE2815987C2 (fr)
ES (1) ES479494A1 (fr)
GR (1) GR64829B (fr)
HK (1) HK43184A (fr)
NO (1) NO153385C (fr)
PL (1) PL214783A1 (fr)
YU (1) YU42179B (fr)
ZA (1) ZA791579B (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0274459A2 (fr) * 1987-01-09 1988-07-13 Prodigy Italiana S.R.L. Thermostat de contrôle de l'opération d'appareils en général
EP0647956A1 (fr) * 1993-10-12 1995-04-12 ETHECO European Thermostat Company Dispositif de commutation à commande thermique avec système à balayage
EP0858089A2 (fr) * 1997-02-07 1998-08-12 Emerson Electric GmbH & Co. Dispositif de commutation
EP3503154A1 (fr) * 2017-12-19 2019-06-26 E.G.O. ELEKTRO-GERÄTEBAU GmbH Procédé de changement d'un fluide de travail dans un système d'expansion et système d'expansion
EP3534389A1 (fr) * 2018-03-01 2019-09-04 E.G.O. ELEKTRO-GERÄTEBAU GmbH Dispositif à température commandée permettant d'éteindre un dispositif chauffant
EP3534390A1 (fr) * 2018-03-01 2019-09-04 E.G.O. ELEKTRO-GERÄTEBAU GmbH Dispositif à température commandée permettant d'éteindre un dispositif chauffant

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE68916025T2 (de) * 1989-11-03 1994-09-29 Caem Srl Einstellbarer elektrischer Thermostat mit Temperaturkompensation.
JPH04194392A (ja) * 1990-11-27 1992-07-14 Mitsubishi Heavy Ind Ltd コントロールバルブの取付構造
DE19706248A1 (de) * 1997-02-18 1998-08-20 Ego Elektro Geraetebau Gmbh Elektrisches Leistungssteuergerät, insbesondere für Elektrowärmegeräte
DE19824871A1 (de) * 1998-06-04 1999-12-09 Ego Elektro Geraetebau Gmbh Temperaturschalter, insbesondere einstellbarer Temperaturregler
US7479868B2 (en) * 2005-06-08 2009-01-20 Therm-O-Disc, Incorporated Trip-free manual reset thermostat
DE102021200991B4 (de) 2021-02-03 2022-05-19 E.G.O. Elektro-Gerätebau GmbH Ausdehnungssystem mit einem Arbeitsfluid

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2180018A (en) * 1936-05-14 1939-11-14 Automatic Control Corp Diaphragm-actuated transmission means
GB595718A (en) * 1943-11-02 1947-12-15 Robertshaw Thermostat Co Automatic temperature or pressure control apparatus for operating electric switches
US2859312A (en) * 1956-03-15 1958-11-04 Wilcolator Co Electric switch mechanism
US3103567A (en) * 1961-01-10 1963-09-10 liebermann etal
DE1440985A1 (de) * 1963-08-16 1969-03-27 Otto Dold Temperatur Mess U Re Thermostatische Schaltvorrichtung
DE1523333A1 (de) * 1965-07-23 1969-10-02 Gen Electric Thermostat
US3891957A (en) * 1974-05-10 1975-06-24 White Westinghouse Corp Reference correctable temperature control
US3924142A (en) * 1974-04-11 1975-12-02 White Westinghouse Corp Fail-safe control

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2260014A (en) * 1941-10-21 Control device
DE933472C (de) * 1949-08-23 1955-09-29 Voigt & Haeffner Ag Elektrothermisch betaetigter Periodenschalter
US2611845A (en) * 1951-03-31 1952-09-23 Hotpoint Inc Temperature control device
US2855486A (en) * 1957-08-15 1958-10-07 Robertshaw Fulton Controls Co Thermostatic switches
US3096420A (en) * 1960-12-27 1963-07-02 Gen Electric Oven thermostat
US3214539A (en) * 1962-05-29 1965-10-26 Gen Electric Thermal cycling switch mechanism having bake and broil positions
FR1274224A (fr) * 1964-12-02 1961-10-20 Robertshaw Fulton Controls Co Perfectionnements aux dispositifs thermostatiques de commande
US3354281A (en) * 1966-12-21 1967-11-21 Gen Electric Temperature control device
DE1983602U (de) * 1968-02-03 1968-04-18 Marquardt J & J Kontaktbruecke fuer elektrische schalter.
US3656182A (en) * 1970-01-08 1972-04-11 Gen Electric Hydraulic thermostat with double throw switch mechanism
DE2312298A1 (de) * 1973-03-13 1974-09-19 Zettler Elektrotechn Alois Werkzeug zum umspritzen oder umpressen von metallteilen
DE7522046U (de) * 1975-07-11 1975-11-20 Thermostat Und Schaltgeraetebau Gmbh & Co Kg Temperaturwählbegrenzer
JPS573078Y2 (fr) * 1976-06-28 1982-01-20
DE2629053C2 (de) * 1976-06-29 1982-06-03 Siemens AG, 1000 Berlin und 8000 München Gehäuse zur Aufnahme von gedruckten Leiterplatten und Substraten
DE2739759C3 (de) * 1976-09-07 1982-07-08 E.G.O. Elektro-Geräte AG, 6301 Zug Temperaturregler für Elektrogeräte mit einer Ausdehnungsdose
US4160225A (en) * 1977-11-14 1979-07-03 General Electric Company Temperature responsive control device with improved hydraulic diaphragm

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2180018A (en) * 1936-05-14 1939-11-14 Automatic Control Corp Diaphragm-actuated transmission means
GB595718A (en) * 1943-11-02 1947-12-15 Robertshaw Thermostat Co Automatic temperature or pressure control apparatus for operating electric switches
US2859312A (en) * 1956-03-15 1958-11-04 Wilcolator Co Electric switch mechanism
US3103567A (en) * 1961-01-10 1963-09-10 liebermann etal
DE1440985A1 (de) * 1963-08-16 1969-03-27 Otto Dold Temperatur Mess U Re Thermostatische Schaltvorrichtung
DE1523333A1 (de) * 1965-07-23 1969-10-02 Gen Electric Thermostat
US3924142A (en) * 1974-04-11 1975-12-02 White Westinghouse Corp Fail-safe control
US3891957A (en) * 1974-05-10 1975-06-24 White Westinghouse Corp Reference correctable temperature control

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0274459A2 (fr) * 1987-01-09 1988-07-13 Prodigy Italiana S.R.L. Thermostat de contrôle de l'opération d'appareils en général
EP0274459A3 (fr) * 1987-01-09 1990-05-30 Prodigy Italiana S.R.L. Thermostat de contrôle de l'opération d'appareils en général
EP0647956A1 (fr) * 1993-10-12 1995-04-12 ETHECO European Thermostat Company Dispositif de commutation à commande thermique avec système à balayage
EP0858089A2 (fr) * 1997-02-07 1998-08-12 Emerson Electric GmbH & Co. Dispositif de commutation
EP0858089A3 (fr) * 1997-02-07 2001-01-03 Emerson Electric GmbH & Co. Dispositif de commutation
EP3503154A1 (fr) * 2017-12-19 2019-06-26 E.G.O. ELEKTRO-GERÄTEBAU GmbH Procédé de changement d'un fluide de travail dans un système d'expansion et système d'expansion
US11761822B2 (en) 2017-12-19 2023-09-19 E.G.O. Elektro-Geraetebau Gmbh Method for changing a working fluid in an expansion system, and expansion system
EP3534389A1 (fr) * 2018-03-01 2019-09-04 E.G.O. ELEKTRO-GERÄTEBAU GmbH Dispositif à température commandée permettant d'éteindre un dispositif chauffant
EP3534390A1 (fr) * 2018-03-01 2019-09-04 E.G.O. ELEKTRO-GERÄTEBAU GmbH Dispositif à température commandée permettant d'éteindre un dispositif chauffant
US10886085B2 (en) 2018-03-01 2021-01-05 E.G.O. Elektro-Geraetebau Gmbh Temperature-controlled device for switching off a heating installation

Also Published As

Publication number Publication date
DE2815987C2 (de) 1986-02-06
NO791231L (no) 1979-10-16
BR7902256A (pt) 1979-12-11
YU87179A (en) 1983-01-21
GR64829B (en) 1980-06-03
ES479494A1 (es) 1980-01-01
ATA239979A (de) 1984-02-15
US4260977A (en) 1981-04-07
HK43184A (en) 1984-05-25
NO153385C (no) 1986-03-05
EP0005191B1 (fr) 1982-05-05
AU523467B2 (en) 1982-07-29
AT376060B (de) 1984-10-10
NO153385B (no) 1985-11-25
PL214783A1 (fr) 1980-01-02
ZA791579B (en) 1980-04-30
JPS6245656B2 (fr) 1987-09-28
YU42179B (en) 1988-06-30
DE2815987A1 (de) 1979-10-18
AU4585179A (en) 1979-10-18
JPS5510791A (en) 1980-01-25

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