EP0201002A2 - Elément interrupteur à commande thermique, en particulier thermostat ou limiteur de température - Google Patents

Elément interrupteur à commande thermique, en particulier thermostat ou limiteur de température Download PDF

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Publication number
EP0201002A2
EP0201002A2 EP86105697A EP86105697A EP0201002A2 EP 0201002 A2 EP0201002 A2 EP 0201002A2 EP 86105697 A EP86105697 A EP 86105697A EP 86105697 A EP86105697 A EP 86105697A EP 0201002 A2 EP0201002 A2 EP 0201002A2
Authority
EP
European Patent Office
Prior art keywords
switching element
element according
steel
switch
spring washer
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
EP86105697A
Other languages
German (de)
English (en)
Other versions
EP0201002B1 (fr
EP0201002A3 (en
Inventor
Walter Hollweck
Karlheinz Eberl
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.)
INTER CONTROL Hermann Koehler Electrik GmbH and Co KG
Original Assignee
INTER CONTROL Hermann Koehler Electrik GmbH and Co KG
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
Priority claimed from DE19853516041 external-priority patent/DE3516041C1/de
Priority claimed from DE19853525093 external-priority patent/DE3525093A1/de
Application filed by INTER CONTROL Hermann Koehler Electrik GmbH and Co KG filed Critical INTER CONTROL Hermann Koehler Electrik GmbH and Co KG
Priority to AT86105697T priority Critical patent/ATE66090T1/de
Publication of EP0201002A2 publication Critical patent/EP0201002A2/fr
Publication of EP0201002A3 publication Critical patent/EP0201002A3/de
Application granted granted Critical
Publication of EP0201002B1 publication Critical patent/EP0201002B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01H37/002—Thermally-actuated switches combined with protective means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/60—Means for producing snap action
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/64—Contacts
    • H01H37/70—Resetting means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H89/00—Combinations of two or more different basic types of electric switches, relays, selectors and emergency protective devices, not covered by any single one of the other main groups of this subclass
    • H01H89/04—Combination of a thermally actuated switch with a manually operated switch

Definitions

  • the invention relates to a thermally controlled electrical switching element, in particular a temperature controller or a temperature limiter with the features of the preamble of claim 1.
  • Switching elements of this type are always used when, in a relatively simple manner, a temperature is to be regulated either around a control point which cannot be influenced by the customer and is therefore preset in the factory or a temperature limitation is to be carried out.
  • Typical areas of application for such thermally controlled electrical switching elements are household appliances, for example electric cooking pots, deep fryers, hairdryers, irons (simple design without the possibility of temperature adjustment by the operator) and the like.
  • the essential elements of such switching elements are a bimetallic spring washer and a switching contact that can be switched into the current path of a heating element, which are arranged together in or on a base.
  • the bimetallic spring washer is mounted in its edge area in such a way that it can bulge centrally above a crack temperature in a first direction A and below a second crack temperature in a second direction B.
  • the moving part of the switching contact is coupled to the jumping movement of the center of the bimetallic spring washer via an actuator (for example an axially displaceable pin) such that the contact is open in one of the directions (for example A) when the bimetallic spring washer bulges.
  • an actuator for example an axially displaceable pin
  • the bimetallic spring washer there is also a steel washer which, when the bimetallic spring washer is curved in the first direction, can also be passed through or arched through in the first direction.
  • the actuator acts on them in the middle and - depending on the position of the spring washer - opens the switch contact.
  • a temperature limiter with the features of the preamble of claim 1 is known, in which the switch contacts can be closed again manually by pressing an axially extending pin after thermal triggering of the switching element. If the device provided with the switching element is to be switched off manually, an additional external switch in the current path must be switched on.
  • the invention has for its object to develop a thermally controlled electrical switching element with the features of the preamble of claim 1 such that manual opening and closing of the pair of switching contacts present in the switching element is made possible in a simple manner.
  • This object is achieved by the characterizing features of claim 1, advantageous developments of the invention result from the subclaims.
  • the invention advantageously uses the snap properties of the steel disc to manually move the switch contact either into a permanently open or permanently closed position, the switch contact opening suddenly.
  • the transmission of the movement of a switch-off button on the steel disk has a particularly advantageous effect out.
  • An adjusting arm is fastened in the edge area of the pane, which, in the manner of a two-armed lever supported by the edge-side pane bearing, pushes the steel pane from one arch position to the other arch position.
  • a central action on the steel disc (or the bimetallic disc) by any centrally acting restoring means can be completely omitted, so that the jumping behavior of the disc is not adversely affected.
  • the switch-off rapid-force movement is carried out by the disc center, which ensures a sudden tearing of the contact both with thermal tripping and with manual tripping.
  • the edge area of the disk which is influenced by the return arm, is arched in the opposite direction until the center of the disk follows abruptly and the contact opens.
  • Claims 2 and 3 relate to the special design of the switching element either as a temperature limiter, in which case the steel disk is designed as a bistable spring washer (claim 2) or as a temperature controller, the steel disk then being designed as a monostable spring washer that can be bulged out on both sides (claim 3).
  • the switching element can be manufactured and operated in one or the other compact, simple, robust and very reliable manner.
  • Claims 18-20 describe a particularly advantageous embodiment of a double regulator which is to be used on household appliances in which two different temperatures are to be regulated as an alternative.
  • Claims 25 and 26 claim in a more general form the steel disc that can be bulged on both sides for controlling the movement contact of a thermally controlled electrical switch with an actuating arm attached in the edge zone.
  • a housing 10 in which an iw circular bimetallic spring washer 12 and a bistable bulging steel washer 14 are arranged in parallel, the bimetallic spring washer 12 being mounted in its edge region 16 in such a way that it is centrally above a jump temperature 5 in a first direction (direction A according to FIG. 5) and in an opposite second direction (direction B) below a return temperature.
  • edge-mounted steel disk 14 is also put through in this direction when the spring washer is curved in the first direction A and in doing so presses an actuator 18 in direction A which, with its end 20 facing away from the disks, raises the movement contact of a switching contact 22, which between the Housing 10 protruding terminal tabs 24 is turned on. More precisely, the actuator penetrates a recess 28 of the movement contact with a taper 26, the taper 26 protruding from the top of the housing and serving as a switch. A central pressure in the second direction (B) can be manually exerted on the center of the steel disk 14 by the taper 26, whereby the contact 22 closes and the steel disk 14 springs back into the switch-on position shown in FIG. 5.
  • the lower part 30 of the housing 10 is enclosed by a pot-like metallic housing part 32, which is used for heat transfer to the spring washer 12 lying on the inside of the housing part 32.
  • a return arm 36 is provided in the edge zone 34 of the steel disk 14, the rest 38 of which is rigidly connected to the edge region 34 of the disk 14 and the actuating end 40 of which is connected to a switch-off button or is designed as such.
  • the force required to open the contact 22 on the actuating end 40 of the return arm 36 is in the direction of arrow "C" according to FIG. 5.
  • the position end 38 of the reset arm is fastened flatly on the edge zone 34 of the disk 14 and projects into the disk surface approximately over half the radius “r / 2”.
  • the return arm 36 projects radially from the disk edge 42, its protruding length "1" from the disk edge 42 corresponding approximately to the disk radius "r”.
  • the actuating end 40 of the reset arm 36 is operated by a reset element 44 which can be displaced in the housing 10 (cf. embodiment according to FIGS. 7 and 8). But it is also possible to reset arm 36 i. w. to run perpendicular to the surface of the disc 14, as shown in Fig. 1. There the actuating end 40 of a Z-shaped return arm 36 protrudes from the metallic housing part 32 enclosing the bimetal and steel disk in a pot-like manner.
  • the second or middle Z-leg 46 runs approximately parallel to the cylindrical section of the metallic housing part 32, the first or lower Z-leg is attached flat to the edge zone 34 of the steel disk 14, to open the contact the upper or third Z-leg (actuating end 40) must be actuated in the direction of arrow "D" according to FIG. 1.
  • the return arm 36 is made of spring steel in order to cushion excessive hand forces when the actuating end 40 is operated manually and not to transmit it to the sensitive spring washers.
  • the temperature limiter according to the second exemplary embodiment according to FIGS. 7 and 8 has an approximately flat right angular housing 50, in which the disks 12, 14 are mounted off-center such that the center of the disks lies approximately at point "Z" in FIG. 7.
  • the actuator 18 also runs through the point "Z” and acts - as already mentioned above - on the center of the disk 14.
  • the edge of the disks 12 and 14 is indicated by dashed lines in FIG. 7.
  • the return arm 36 protrudes radially from the disk 14, as shown in FIGS. 3-6, and is arranged in the housing in such a way that the actuating end 40 comes to rest under the point “X” according to FIG. 7. At this point there is the reset element, which is arranged in the housing 50 so as to be longitudinally displaceable parallel to the actuator 18.
  • buttons On button 54, off button 56 are provided which interact with the actuators 18 and 44. It is important that the pressure direction for operating both buttons 54 and 56 is in the same direction in direction 58.
  • the terminal contact tabs 60, the switch contact 22 and the switch 54 are in a first housing groove 62, the switch 56 for a second housing groove 64. All elements are connected to the groove bottoms by rivets.
  • the switch 54 designed as a spring tongue the movement contact of the switch contact 22 and the connection contact tab 60 on the right in the drawing are held by a common rivet 66 on the groove base.
  • the switch 54 designed as a spring tongue there is an approximate parallel position between the switch 54 designed as a spring tongue and the movement contact of the switch contact 22, so that it is possible to apply the switch contact 22 in the contact closing direction by actuating the switch 54 in direction 58.
  • the contact is closed and, via the actuator 18, the steel disk 14 is brought into the position shown in FIG. 5, provided that the bimetal disk 12 is below its return temperature.
  • the ON button 54 and the OFF button 56 are of identical design and are located parallel to one another in their respective housing grooves 62, 64. Both buttons 54, 56 act with their central region on the actuator 18, 44 assigned to them in the direction of the disks 12, 14. Both buttons 54, 56 stand with their free ends out of the housing grooves 62, 64 and can deflect with the upward bent free ends into the groove without fear of destruction or bending of the switching elements.
  • a temperature controller 101 is shown schematically, which has a controller base 102, a bimetallic spring washer 103, a switch contact 104 which can be switched into the current path of a heating element, not shown, and a monostable steel disk 105.
  • the bimetallic spring washer 103 is supported in its edge region 106 on a base plate 107 in such a way that its center 108 is above a first jump temperature in a first direction A and below a second jump temperature in an opposite direction B. can arch.
  • the bimetal spring washer is shown in position B.
  • the moving part 109 of the switching contact 104 is connected to the center 108 of the bimetal spring washer via an actuator 110 in such a way that the switching contact 104 is pressed open in the direction A when the bimetal spring washer bulges.
  • This steel washer is a so-called monostable bulging steel washer, i. H. a steel disc, which can be put through from a first direction of curvature to a second direction of curvature by manual action, but automatically springs back to its original direction of curvature when the manual action decreases.
  • an actuating arm 112 is arranged in the edge zone 111, the adjusting end 113 of which is connected to the edge region of the steel disk 105 in a flexurally rigid manner and the actuating end 114 is acted upon by a switch-off device 115.
  • the switch-off device 115 is designed as a push button with a self-holding function, which acts on the actuating end 114 with its inner end 116. If the switch-off device 115 is pressed in in the direction of the arrow 117, the steel disk 105 jumps in the direction A, moves the actuator 110 in the direction of the arrow 118 and suddenly opens the switch contact 104. The bimetallic snap disk 103 remains unaffected in the curved position B during this manual switch-off.
  • FIG 11 shows particularly clearly how the bimetal spring washer 103 and the steel washer 105 - both in the rest state (position B) - lie against one another in a parallel position. If the bimetallic spring washer 103 jumps over to the bulge position A as a result of a temperature rise above the first jump temperature, it also takes the monostable steel washer into the A position. In other words, the steel plate performs a forced movement together with the bimetal spring plate.
  • the adjusting arm 112 can be arranged with its adjusting end 113 flat on the edge zone 111 of the steel disk 105, for example welded or soldered on. Its protruding length 1 beyond the disc edge 119 corresponds approximately to the radius r of the steel disc 105, and the actuating arm also projects into the disc surface approximately over half the radius r / 2. In Fig. 10 it is indicated that the actuating arm can also be formed in one piece with the steel disc.
  • FIGS. 13 and 13a There is shown a controller in which the bimetallic spring washer and the steel washer are arranged in a pot-shaped metallic housing part 130.
  • Bimetal spring washer 103 and steel washer 105 lie in parallel position (as in the other embodiments) on the bottom 131 of the housing part s 130, the actuator 132 is perpendicular to the middle plane of the bimetal spring washer and the steel washer and is guided in an iw circular base part 133, which is completely enclosed by the housing part 130.
  • the switching contact (not shown in more detail) is arranged, which (as in the other exemplary embodiments also) is opened or closed by the actuator 132 as a result of the arching movements of the bimetallic spring washer and / or the steel washer.
  • the terminal lug 135 is connected to the switch contact.
  • the actuating arm i. w. Bent in a Z-shape, the first Z-leg 140 being arranged flat on the edge region of the steel disk 105 or merging into it, the second Z-leg 141 runs approximately parallel to the cylindrical section 135 of the housing part 130 and the third Z-leg 142 as the actuating end protrudes from the housing part 130.
  • two regulators 101, 101 ′ are arranged side by side in a parallel position on a common heat-transferring base plate 150.
  • the switch-off device 151, 151 ' is again designed and suitable as an axially displaceable pin which protrudes laterally from the controller bases 102, 102' Actuating arms 112, 112 'jointly or alternatively.
  • Common application means that the current paths are interrupted by both regulators and the heating element downstream of the two regulators is thus completely switched off. If only one controller is switched off by the associated switch-off device 151 or 151 ', control is carried out in the target temperature range associated with the switched-on controller. If both controllers are switched on, the regulation takes place due to the parallel connection of the two controllers by the higher control setpoint.
  • the actuating arms 112, 112' protrude from an opening 152, 152 'arranged between the base plate 107, 150 and the controller base 102, 102', which at the same time provides a certain guidance for the actuating arms 112, 112 'against rotation together with the steel discs.
  • the common base plate 150 projects laterally beyond the bases 102, 102 'of the controllers 101, 101' and the standoff length Z, Z 'of the actuating arms 112, 112' is smaller than the standover length Ü, Ü of the base plate 150.

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Thermally Actuated Switches (AREA)
  • Control Of Temperature (AREA)
EP86105697A 1985-05-04 1986-04-24 Elément interrupteur à commande thermique, en particulier thermostat ou limiteur de température Expired - Lifetime EP0201002B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86105697T ATE66090T1 (de) 1985-05-04 1986-04-24 Thermisch gesteuertes elektrisches schaltelement, insbesondere temperaturregler oder temperaturbegrenzer.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19853516041 DE3516041C1 (de) 1985-05-04 1985-05-04 Temperaturbegrenzer
DE3516041 1985-05-04
DE19853525093 DE3525093A1 (de) 1985-07-13 1985-07-13 Temperaturregler
DE3525093 1985-07-13

Publications (3)

Publication Number Publication Date
EP0201002A2 true EP0201002A2 (fr) 1986-11-12
EP0201002A3 EP0201002A3 (en) 1989-06-14
EP0201002B1 EP0201002B1 (fr) 1991-08-07

Family

ID=25831967

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86105697A Expired - Lifetime EP0201002B1 (fr) 1985-05-04 1986-04-24 Elément interrupteur à commande thermique, en particulier thermostat ou limiteur de température

Country Status (4)

Country Link
US (1) US4703301A (fr)
EP (1) EP0201002B1 (fr)
CA (1) CA1257895A (fr)
DE (1) DE3680702D1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3843950C1 (en) * 1988-12-24 1990-03-29 Inter Control Hermann Koehler Elektrik Gmbh & Co Kg, 8500 Nuernberg, De Thermally controllable switching device
DE4104212A1 (de) * 1991-02-12 1992-08-13 Braun Ag Haarpflegegeraet mit temperaturbereitschaftsanzeige
EP0678891A1 (fr) * 1994-04-23 1995-10-25 Thermik Gerätebau GmbH Interrupteur dépendant du courant

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7021963B2 (en) * 2002-08-15 2006-04-04 3M Innovative Properties Company Electrical contact
US7060938B1 (en) 2005-02-22 2006-06-13 Casco Products Corporation Double-disk assembly for a cigar or cigarette lighter
US7479868B2 (en) * 2005-06-08 2009-01-20 Therm-O-Disc, Incorporated Trip-free manual reset thermostat
CN104882330B (zh) * 2015-05-27 2017-04-26 徐冠忠 带双重控制的温控器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2361162A (en) * 1942-08-26 1944-10-24 Westinghouse Electric & Mfg Co Circuit interrupter
FR1150119A (fr) * 1956-04-28 1958-01-08 Electro Mecaniques Soc Et Interrupteur-disjoncteur
US3087033A (en) * 1959-05-04 1963-04-23 Dales George Franklin Snap thermostat
GB956775A (en) * 1960-05-18 1964-04-29 Texas Instruments Inc Thermally actuated electric switch
DE2544201A1 (de) * 1975-10-03 1977-04-07 Inter Control Koehler Hermann Rueckstellbarer temperaturbegrenzer

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3885222A (en) * 1972-06-06 1975-05-20 Robertshaw Controls Co Thermostat construction

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2361162A (en) * 1942-08-26 1944-10-24 Westinghouse Electric & Mfg Co Circuit interrupter
FR1150119A (fr) * 1956-04-28 1958-01-08 Electro Mecaniques Soc Et Interrupteur-disjoncteur
US3087033A (en) * 1959-05-04 1963-04-23 Dales George Franklin Snap thermostat
GB956775A (en) * 1960-05-18 1964-04-29 Texas Instruments Inc Thermally actuated electric switch
DE2544201A1 (de) * 1975-10-03 1977-04-07 Inter Control Koehler Hermann Rueckstellbarer temperaturbegrenzer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3843950C1 (en) * 1988-12-24 1990-03-29 Inter Control Hermann Koehler Elektrik Gmbh & Co Kg, 8500 Nuernberg, De Thermally controllable switching device
DE4104212A1 (de) * 1991-02-12 1992-08-13 Braun Ag Haarpflegegeraet mit temperaturbereitschaftsanzeige
EP0678891A1 (fr) * 1994-04-23 1995-10-25 Thermik Gerätebau GmbH Interrupteur dépendant du courant

Also Published As

Publication number Publication date
EP0201002B1 (fr) 1991-08-07
EP0201002A3 (en) 1989-06-14
DE3680702D1 (de) 1991-09-12
CA1257895A (fr) 1989-07-25
US4703301A (en) 1987-10-27

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