EP0677860A2 - Thermostat zur Steuerung der Schaltungsanordnung zur Stromversorgung des Heizelementes eines gerätes - Google Patents

Thermostat zur Steuerung der Schaltungsanordnung zur Stromversorgung des Heizelementes eines gerätes Download PDF

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Publication number
EP0677860A2
EP0677860A2 EP95400655A EP95400655A EP0677860A2 EP 0677860 A2 EP0677860 A2 EP 0677860A2 EP 95400655 A EP95400655 A EP 95400655A EP 95400655 A EP95400655 A EP 95400655A EP 0677860 A2 EP0677860 A2 EP 0677860A2
Authority
EP
European Patent Office
Prior art keywords
electrical
support
thermostat
blade
fixed
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
EP95400655A
Other languages
English (en)
French (fr)
Other versions
EP0677860B1 (de
EP0677860A3 (de
Inventor
Jean-Paul Ange André Bouleau
Gérard Louis Henri Guillot
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.)
Moulinex SA
Original Assignee
Moulinex SA
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 FR9404325A external-priority patent/FR2716570B1/fr
Application filed by Moulinex SA filed Critical Moulinex SA
Publication of EP0677860A2 publication Critical patent/EP0677860A2/de
Publication of EP0677860A3 publication Critical patent/EP0677860A3/de
Application granted granted Critical
Publication of EP0677860B1 publication Critical patent/EP0677860B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F75/00—Hand irons
    • D06F75/08—Hand irons internally heated by electricity
    • D06F75/26—Temperature control or indicating arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/08—Indicators; Distinguishing marks
    • 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
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/0066—Auxiliary contact devices

Definitions

  • the invention relates to an adjustable thermostat with quick opening by shifting from neutral to control an electrical supply circuit for a heating element of an appliance and comprising a support comprising a stack of partitions and receiving a thermostat arm, a blade forming a fixed contact, a bimetallic strip comprising a free end and an end fixed to said support and influenced by the heating temperature to be detected of the heating element, a movable blade fixed to the support and provided with a flexible tongue on which an ankle rests insulator controlled by a rotary screw making it possible to obtain a set temperature of the heating element and another movable blade fixed, on the one hand, to the support and, on the other hand, to the movable blade and whose free end carries a contact capable of touching the fixed contact as well as an insulating spacer secured to the end of the bimetallic strip and controlling the movable blades; the blade forming a fixed contact and the movable blades are respectively connected to a first and a second electrical terminal intended to be connected by at least two wires to the electrical
  • control devices use electronic devices for processing information from a quick-opening thermostat and controlling the triggering of the indicator lights.
  • Electronic devices are sensitive to variations in temperature and humidity.
  • the insertion of such electronic devices considerably increases the cost price of a household electrical appliance.
  • the object of the invention is to remedy the aforementioned drawbacks by implementing a device for controlling a "too hot" indicator light which is mechanical, simple and economical.
  • the thermostat comprises an elastic conductive strip which comprises a free end and an end fixed to said support, and which is connected to the supply network by an electric wire connected to the end fixed to the support and whose region of the free end can occupy at least two positions, ie a first position for which the region of the free end is in contact with the flexible tongue by a support means when the set temperature is greater than or equal to the temperature of heating and in which the light says "too hot” is off, a second position for which the region of the free end is not in contact with the flexible tab when the set temperature is lower than the heating temperature and in which the light says "too hot” is on.
  • thermostat according to the invention, electronic devices are eliminated by the use of a single mechanical device and a limitation is therefore obtained on the number of electrical components inside the household appliance, which reduces the cost of said appliance. .
  • the simplicity of said device increases the free space inside the household appliance improving the possibilities of arrangement of the numerous elements contained inside the household appliance.
  • an adjustable thermostat 1 with quick opening by passing through neutral for controlling a power supply circuit (not shown) of a heating element of an appliance, comprises a support comprising a stack of partitions 2, 3 and 4 and receiving a thermostat arm 5, a blade 6 forming a fixed contact, a bimetallic strip 7 comprising a free end 8 and an end 9 fixed to said support and influenced by the heating temperature of the heating element to be detected, a blade mobile 10 fixed to the support and provided with a flexible tongue 11 on which presses an insulating plug 12 controlled by a rotary screw 13 making it possible to obtain a set temperature of the heating element and another movable blade 14 fixed, on the one hand, to the support and, on the other hand, to the movable blade 10 and whose free end 15 carries a contact capable of touching the fixed contact 6 as well as an insulating spacer 16 secured to the end of the bimetallic strip 7 and controlling the movable blades 10 and 14.
  • the blade 6 forming fixed contact, the blades mobiles 10 and 14 are respectively connected to a first terminal 17 and to a second terminal 18, intended to be connected, by at least two electrical wires 34, 37 to the electrical supply circuit of at least one indicator light 38 for indication "too hot" state of the heating element.
  • the partitions 2, 3 and 4, and the plug 12 as well as the spacer 16 are made of an electrical insulating material.
  • the adjustable thermostat 1 comprises an elastic conductive strip 21 which includes a free end 22 and an end 23 fixed to said support, and which is connected to the supply circuit by an electric wire 24 connected to the fixed end 23 to the support and whose region of the free end 22 can occupy at least two positions, ie a first position for which the region of the free end 22 is in contact with the flexible tongue 11 by a support means 25 when the set temperature is greater than or equal to the heating temperature and in which the light 38 says "too hot” is off, a second position for which the region of the free end 22 is not in contact with the flexible tongue 11 when the set temperature is lower than the heating temperature and in which the light says "too hot” is on.
  • the elastic conductive strip 21 is, for example, a metal strip. Said metal blade has a hole 26 through which the insulating plug 12 passes.
  • the support means 25 is, for example, a lug produced by a cut in the blade 21.
  • the thermostat support comprises in order a lower insulating element 2, a middle element 3 and an upper element 4.
  • the various blades and insulating elements are held together by a tubular rivet R one end of which is intended to be fixed on the heating element.
  • the conductive strip 21 comprises an adjustment means 28 fixed on the free end 22 of said conductive strip 21 and capable of coming into contact with the upper end 16 'of the insulating spacer 16 when the set temperature is lower than the heating temperature of the heating element.
  • the adjusting means 28 is, for example, a finger 29 mounted adjustable in a sleeve 30 carried by the free end 22 of the blade 21.
  • This finger can be produced by a screw rotatably mounted in a threaded sleeve.
  • the heating element comprising an electrical resistance
  • the thermostat supply circuit comprises a male connector 32 intended to be connected to an electrical outlet and comprising a ground wire 33, a first electrical wire 34 connected at one end 35 of the electrical resistance 31, the other end 36 of which is connected to the second electrical terminal 18, and a second electrical wire 37 connected to the first electrical terminal 17, and the electrical supply network includes a resistor 42 mounted in series with said sight glass 38.
  • One end 41 of the resistor 42 is connected to the end 35 of the resistor 31 and the other end 43 of said resistor 42 is connected, on the one hand, to the wire 24, and on the other hand, to a tab 39 of the indicator lamp 38, the other tab 40 of which is connected to the first terminal 17.
  • the heating element comprises a part to be heated 44 thermally linked to the resistor 31 and to the bimetallic strip 7 of the thermostat by the tubular rivet R.
  • the set temperature corresponds to an ideal temperature necessary for ironing a particular type of clothing.
  • the soleplate of the iron heats up, the contact between the end of the blade 6 forming a fixed contact and the free end 15 of the movable blade 14 is closed.
  • the free end of the bimetallic strip 7 bends upwards and raises, by the end 16, the movable blades 10 and 14.
  • the movable blade 14 abruptly leaves the blade forming a fixed contact 16 to come into abutment against a fixed point of the movable blade 10 linked to the first electrical terminal 17 connected to the first supply wire 37.
  • the conductive strip 21 by its support means 25 is continuously in contact with the flexible tab 11 connected to the first electrical terminal 17 linked to the wire 37.
  • the resistor 42 of the "too hot” indicator has a high impedance of so as to create a large drop in voltage and to act as a permanent short circuit so that, in this position, the "too hot” light 38 is off.
  • the user When the user wishes a set temperature lower than the previous set temperature, the user turns, in the opposite direction to the first setting, the rotary screw 13 of the thermostat, the contact between the end of the blade 16 and the end free remaining open, the insulating plug 12 presses on the flexible tongue 11 and pushes it.
  • the free end 22 by its adjusting means 23 comes into contact with the end 16 'of the insulating spacer 16 while the flexible tongue 11 continues to descend.
  • the support means 25 is therefore no longer in contact with the flexible tongue 11, which triggers the lighting of the "too hot” light indicator 38. This light does not go out until the soleplate of the iron to be ironed has cooled down sufficiently, that is to say when the end of the bimetallic strip 7 has come down slightly and occupies a corresponding position at the last set temperature.
  • the adjustable thermostat 1 can be used in an electric oven. Said thermostat measures, for example, the heating temperature of the oven cavity in which a food is positioned and for which a certain temperature must not be exceeded in a particular use.
  • the thermostat according to the invention also applies to any type of device in which the indication of an excessively high temperature must be known to the user before a new use of this device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Resistance Heating (AREA)
  • Thermally Actuated Switches (AREA)
  • Control Of Temperature (AREA)
EP95400655A 1994-04-12 1995-03-24 Thermostat zur Steuerung der Schaltungsanordnung zur Stromversorgung des Heizelementes eines gerätes Expired - Lifetime EP0677860B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9404325A FR2716570B1 (fr) 1994-02-18 1994-04-12 Thermostat destiné à piloter un circuit d'alimentation d'un élément chauffant d'un appareil.
FR9404325 1994-04-12

Publications (3)

Publication Number Publication Date
EP0677860A2 true EP0677860A2 (de) 1995-10-18
EP0677860A3 EP0677860A3 (de) 1997-10-22
EP0677860B1 EP0677860B1 (de) 2001-12-12

Family

ID=9462011

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95400655A Expired - Lifetime EP0677860B1 (de) 1994-04-12 1995-03-24 Thermostat zur Steuerung der Schaltungsanordnung zur Stromversorgung des Heizelementes eines gerätes

Country Status (3)

Country Link
EP (1) EP0677860B1 (de)
AT (1) ATE210887T1 (de)
DE (1) DE69524466D1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0841428A1 (de) * 1996-11-08 1998-05-13 Seb S.A. Überhitzungsanzeiger für Elektro-Haushaltsgerät
EP0887825A3 (de) * 1997-05-26 1999-08-11 Oficina De Investigacion Agrupada, S.A. Thermischer Schnappschalter mit eingebautem Temperatursensor

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4968963A (en) * 1989-11-06 1990-11-06 Bimet Corporation Thermostat with pilot light switch

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0841428A1 (de) * 1996-11-08 1998-05-13 Seb S.A. Überhitzungsanzeiger für Elektro-Haushaltsgerät
FR2755762A1 (fr) * 1996-11-08 1998-05-15 Seb Sa Indicateur de surchauffe pour appareil electromenager
EP0887825A3 (de) * 1997-05-26 1999-08-11 Oficina De Investigacion Agrupada, S.A. Thermischer Schnappschalter mit eingebautem Temperatursensor

Also Published As

Publication number Publication date
EP0677860B1 (de) 2001-12-12
ATE210887T1 (de) 2001-12-15
EP0677860A3 (de) 1997-10-22
DE69524466D1 (de) 2002-01-24

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