EP0841428A1 - Überhitzungsanzeiger für Elektro-Haushaltsgerät - Google Patents

Überhitzungsanzeiger für Elektro-Haushaltsgerät Download PDF

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Publication number
EP0841428A1
EP0841428A1 EP97420202A EP97420202A EP0841428A1 EP 0841428 A1 EP0841428 A1 EP 0841428A1 EP 97420202 A EP97420202 A EP 97420202A EP 97420202 A EP97420202 A EP 97420202A EP 0841428 A1 EP0841428 A1 EP 0841428A1
Authority
EP
European Patent Office
Prior art keywords
indicator
thermostat
self
switch
circuit
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
EP97420202A
Other languages
English (en)
French (fr)
Other versions
EP0841428B1 (de
Inventor
Serge Cubizolles
Thierry Gailhard
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.)
SEB SA
Original Assignee
SEB 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
Application filed by SEB SA filed Critical SEB SA
Publication of EP0841428A1 publication Critical patent/EP0841428A1/de
Application granted granted Critical
Publication of EP0841428B1 publication Critical patent/EP0841428B1/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

Definitions

  • the present invention relates to the general technical field of household electrical heating appliances, and more particularly to appliances having different distinct heating powers depending on their use.
  • the invention applies for example to irons, cooking appliances or wax epilators.
  • the present invention relates more particularly to an apparatus provided with means indicating an overheating following a command or a start-up of said apparatus. It is thus already known to use two thermostats adjusted to different temperatures and associated with a wired logic allowing to indicate according to the state of said thermostats if the device is at a too low or too high temperature. Such a system has a major drawback insofar as the use of two thermostats leads to a non-negligible additional cost.
  • the object of the present invention is to remedy the aforementioned drawbacks and to provide a simplified overheating indicator for household electrical appliances, in a reliable and inexpensive manner, in terms of component and manufacturing costs.
  • Another object of the present invention aims to considerably reduce the complexity of the various elements or parts making up the device making it possible to produce an overheating indicator.
  • Another object of the present invention is to provide an apparatus, having an overheating indicator to avoid improper use of said apparatus.
  • a state indication device for household appliances comprising at least one heating element the electrical supply of which is controlled by a thermostat, a member for selecting a setpoint temperature and control means to indicate that the selected setpoint temperature has been exceeded, characterized in that the control means comprise an electrical or electronic circuit connected in parallel to the thermostat, said circuit comprising on the one hand an auto system -maintained controlling a visual or audible indicator, and on the other hand a means for initiating said self-maintained system as soon as the selection member is actuated, the assembly being deactivated by closing the thermostat.
  • FIG. 1 thus shows the power supply to the sector with the branches L, N respectively representing the phase and the neutral of the sector.
  • Figure 1 also shows a heating element 1 in series with a thermostat 2, the assembly being connected to the mains.
  • the thermostat 2 and produced in a known manner and in particular with a switch 2a making it possible to open or close the supply circuit of the heating element 1 as a function of the temperature, either of the heating element or of hot parts of the device on which it is mounted.
  • the thermostat 2 has a structure known per se, which allows, with the aid of a member for selecting a set temperature, to adequately control the heating element 1 and thus obtain an optimal operating temperature. of the device.
  • the latter also comprises, in accordance with the invention, control means for indicating that the selected setpoint temperature has been exceeded.
  • control means include an electronic circuit 8 connected in parallel to the thermostat 2. This circuit is connected, as shown for example in FIG. 1, at a connection point 7a located between the heating element 1 and the thermostat 2.
  • the electronic circuit 8 consists in particular of a self-maintained system 4 connected in series with a visual or audible indicator 3.
  • the self-maintained system 4 is for example made up of a thyristor 4a, which is fitted in series with the indicator 3.
  • the device according to the invention also comprises a means for starting the thyristor 4a following actuations of the selection member.
  • the thyristor 4a and the indicator 3 are connected to the connection point 7a through rectifying and filtering elements 6.
  • the latter thus make it possible to use electrical or electronic components adapted to the voltage coming from these rectifying means and filter 6.
  • the electronic circuit 8 is therefore supplied electrically through the rectifying and filtering elements 6.
  • the means for starting the thyristor 4a comprises a control switch 5 mechanically connected by any means to the selection member 16 and producing a fugitive microswitch whose closing is synchronized with a movement of said selection member 16.
  • FIG. 4 shows an exemplary embodiment and arrangement of such a fugitive microswitch relative to the selection member 16.
  • the latter thus comprises a linear slider 18, one end 18a of which makes a rack cooperating with an adjustment wheel 2b of the thermostat 2.
  • the adjustment wheel 2b advantageously has a serration engaging on the end 18a.
  • Such an arrangement makes it possible to transform a linear movement of the cursor 18 into rotary displacement.
  • the selection member 16 also consists of a support piece 16a making it possible to drive the cursor 18.
  • the support piece 16 has a relative movement relative to the cursor 18, and this against the restoring force of a spring 17. The latter allows the support piece 16a to be released from the control switch 5 when the user no longer exerts pressure on said support piece 16a.
  • the control switch 5 is indeed integral with the cursor 18 and the support piece 16a has a configuration allowing it actuate said control switch 5.
  • the control switch 5 When the user moves the cursor 18, he exerts a force in the direction F, on the support piece 16a, which actuates the control switch 5.
  • the spring 17 makes it possible to release the control switch 5 from the pressure exerted by the support piece 16a.
  • the closing of the control switch 5 takes place only during the movement of the cursor 18 in the direction F. Such an assembly consequently achieves a fleeting contact or microswitch.
  • the control switch 5 is connected to a branch of the circuit 8 using wires 5a, 5b connected respectively to the thyristor 4a in order to start the latter, as well as to a connection point 7b located between the indicator 3 and the rectifying and filtering elements 6.
  • a current is supplied to the thyristor 4a and makes it possible to start the latter.
  • the thyristor 4a conducts an electric current through the indicator 3 thus causing a sound or visual effect as long as the switch 2a is in the open position.
  • the control switch 5 preferably achieves a very short or instantaneous closure, but sufficient however to start the thyristor 4a.
  • the microswitch produced by the control switch 5 is advantageously mounted on elastic means or springs not shown in the figures, and driven by the displacement of the selection member 16, said springs possibly being able to fulfill the function of spring 17.
  • connection point 7b can be connected directly by a simple short circuit to the connection point 7a, eliminating the rectification means and filtering 6. In this case, it suffices to use components for the electronic circuit 8 adapted to the voltage supplied by the sector.
  • the circuit 8 in this case comprises a self-maintained system consisting of a relay 13, which is produced with a coil 13a driving two relay switches 14 and 15.
  • the indicator 3 is connected to the connection point 7b and to the neutral N through the first relay switch 14.
  • the coil 13a is connected on the one hand to the neutral N and on the other hand to the connection point 7b, via the second relay switch 15.
  • the control switch 5 is connected in parallel to the second relay switch 15.
  • the relay 13 only comprises the first relay switch 14 connected between the coil 13a and the indicator 3, said coil 13a being connected to the neutral N and said indicator 3 being connected to connection point 7b.
  • Rectifying and filtering elements 6, known per se, are arranged between the connection points 7a and 7b so as to supply direct current to the indicator 3 and to the coil 13a.
  • the control switch 5 is connected in parallel with the indicator 3 and the first relay switch 14. With a judicious choice of the characteristics of the relay 13 and of the indicator 3, the rectifying and filtering elements 6 can be eliminated and replaced by a short circuit.
  • the means for starting the thyristor 4a comprises the control switch 5 capable of connecting phase L to said thyristor 4a, via an interface 10 for limit the current of the priming signal.
  • the control switch 5 is connected in parallel with a circuit branch comprising a resistor 11 and a capacitor 12.
  • thermostat 2 switch 2a When the thermostat 2 switch 2a remains open, a power cut or an accidental disconnection of the device will not affect the status of the indicator 3.
  • the reappearance of an electrical potential on the phase L causes a charge of the capacitor 12 and consequently generates a starting current through an interface 10, which is connected to the thyristor 4a.
  • the interface 10 is chosen to optimize the boot signal.
  • the device according to the invention therefore comprises means capable of returning the indicator 3 to its initial operating state following a break in the electrical supply.
  • the initial state corresponds to the state of indicator 3 just before the power supply breaks. Using an appliance that is too hot can thus be avoided.
  • the thermostat 2 by means of the switch 2a proceeds to the thermal regulation of the said appliance.
  • the switch 2a opens and consequently interrupts the supply of the heating element 1.
  • This operating state corresponds to overheating compared to the set temperature.
  • the actuation of the selection member 16 has caused the thyristor 4a to start, and consequently the operation of the indicator 3, by at least instantaneous closure of the control switch 5 or of the microswitch.
  • the switch 2a closes the supply circuit of the heating element 1 and at the same time short-circuits the electronic circuit 8.
  • the closing of the switch 2a Indicator 3 is also interrupted or extinguished.
  • the device according to the present invention has an unexpected advantage insofar as it makes it possible to dispense with the use on the one hand of systems with non-standard thermostats and on the other hand of expensive processing electronics.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Resistance Heating (AREA)
  • Control Of Temperature (AREA)
EP19970420202 1996-11-08 1997-10-31 Überhitzungsanzeiger für Elektro-Haushaltsgerät Expired - Lifetime EP0841428B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9613995A FR2755762B1 (fr) 1996-11-08 1996-11-08 Indicateur de surchauffe pour appareil electromenager
FR9613995 1996-11-08

Publications (2)

Publication Number Publication Date
EP0841428A1 true EP0841428A1 (de) 1998-05-13
EP0841428B1 EP0841428B1 (de) 2001-11-28

Family

ID=9497689

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19970420202 Expired - Lifetime EP0841428B1 (de) 1996-11-08 1997-10-31 Überhitzungsanzeiger für Elektro-Haushaltsgerät

Country Status (4)

Country Link
EP (1) EP0841428B1 (de)
DE (1) DE69708579T2 (de)
ES (1) ES2166517T3 (de)
FR (1) FR2755762B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2411340A (en) * 2004-02-27 2005-08-31 Jai Indar Ragbir Heater for depilatory wax

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116759991B (zh) * 2023-08-21 2023-10-27 交口县光煜光伏发电有限责任公司 光伏汇流箱报警及跳闸保护功能装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0677860A2 (de) * 1994-04-12 1995-10-18 Moulinex S.A. Thermostat zur Steuerung der Schaltungsanordnung zur Stromversorgung des Heizelementes eines gerätes

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0677860A2 (de) * 1994-04-12 1995-10-18 Moulinex S.A. Thermostat zur Steuerung der Schaltungsanordnung zur Stromversorgung des Heizelementes eines gerätes

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2411340A (en) * 2004-02-27 2005-08-31 Jai Indar Ragbir Heater for depilatory wax
GB2411340B (en) * 2004-02-27 2009-03-04 Jai Indar Ragbir Improved wax heater

Also Published As

Publication number Publication date
EP0841428B1 (de) 2001-11-28
ES2166517T3 (es) 2002-04-16
FR2755762B1 (fr) 1998-12-24
DE69708579D1 (de) 2002-01-10
FR2755762A1 (fr) 1998-05-15
DE69708579T2 (de) 2002-07-04

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