DE2653322A1 - LAUNDRY DRYER - Google Patents

LAUNDRY DRYER

Info

Publication number
DE2653322A1
DE2653322A1 DE19762653322 DE2653322A DE2653322A1 DE 2653322 A1 DE2653322 A1 DE 2653322A1 DE 19762653322 DE19762653322 DE 19762653322 DE 2653322 A DE2653322 A DE 2653322A DE 2653322 A1 DE2653322 A1 DE 2653322A1
Authority
DE
Germany
Prior art keywords
ptc
resistors
dryer
switched
ptc resistors
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
DE19762653322
Other languages
German (de)
Other versions
DE2653322C2 (en
Inventor
Walter Dipl Phys Heissmeier
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs 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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Priority to DE2653322A priority Critical patent/DE2653322C2/en
Priority to GB46814/77A priority patent/GB1553145A/en
Priority to NL7712547A priority patent/NL7712547A/en
Priority to CH1406977A priority patent/CH620723A5/en
Priority to IT29947/77A priority patent/IT1088287B/en
Publication of DE2653322A1 publication Critical patent/DE2653322A1/en
Application granted granted Critical
Publication of DE2653322C2 publication Critical patent/DE2653322C2/en
Expired legal-status Critical Current

Links

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
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/26—Heating arrangements, e.g. gas heating equipment
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
    • H05B3/12—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
    • H05B3/14—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material the material being non-metallic
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/52—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers related to electric heating means, e.g. temperature or voltage
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/28—Electric heating

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Drying Of Solid Materials (AREA)
  • Control Of Resistance Heating (AREA)
  • Control Of Temperature (AREA)

Description

Licentia
Patent-Verwaltungs-GmbH Frankfurt / MainLicentia
Patent-Verwaltungs-GmbH Frankfurt / Main

EBHZ-76/83 22.11.1976 EBHZ-76/83 November 22, 1976

Ul/gfUl / gf

WäschetrocknerClothes dryer

Die Erfindung betrifft einen Wäschetrockner mit einer Trocknersteuerung und einer PTC-Widerstandsheizung.The invention relates to a tumble dryer with a dryer control and a PTC resistance heater.

Ein derartiger Wäschetrockner ist durch die DT-OS 2 559 0 35 bekannt.Such a tumble dryer is known from DT-OS 2 559 0 35.

Weiterhin ist durch die DT-AS 1 286 242 eine elektrisch beheizte Wärmeplatte mit mehreren parallel zueinander liegenden und durch eine Glimmerschicht isolierten stabförmigen Kaltleitern bekannt, wobei die Kaltleiter gegen die Wärmeplatte gepreßt sind, so daß sich die Temperatur der Platte auf diejenige Temperatur einstellt, bei der der KaltleiterFurthermore, the DT-AS 1 286 242 provides an electrically heated heating plate with several parallel to each other and rod-shaped PTC thermistors insulated by a mica layer are known, the PTC thermistors against the heating plate are pressed so that the temperature of the plate adjusts to the temperature at which the PTC thermistor

809822/0OS3809822 / 0OS3

EBHZ-76/83 22.11.1976 EBHZ-76/83 November 22, 1976

Ul/gfUl / gf

den ihn durchfließenden Strom drosselt.throttles the current flowing through it.

Aufgrund des niedrigen Kaltwiderstandes des Kaltleiters (PTC-Widerstands) treten bei Elektrogroßgeräten wie Wäschetrockner derart hohe Einschaltströme auf, daß zusätzliche Überlastungsschutzeinrichtungen oder eine Zusatzheizung zum Vorheizen des Kaltleiters notwendig sind. Die Verwendung von PTC Heizwiderständen beschränkte sich deshalb auf relativ kleine Heizleistungen, wie z.B. bei Brotröstern (DT-AS 2 040 177)Due to the low cold resistance of the PTC resistor, large electrical appliances such as tumble dryers occur such high inrush currents that additional Overload protection devices or additional heating to preheat the PTC thermistor are necessary. The usage of PTC heating resistors are therefore limited to relatively small heating outputs, such as for bread toasters (DT-AS 2 040 177)

Der Erfindung liegt die Aufgabe zugrunde, einen Wäschetrockner der eingangs genannten Art so auszubilden, daß der Einsatz von PTC-Widerständen (Kaltleitern) in vorteilhafter Weise und ohne die aufwendigen Zusatzvorrichtungen auch bei Leistungen um 3 KW möglich ist.The invention is based on the object of designing a tumble dryer of the type mentioned in such a way that the insert of PTC resistors (PTC thermistors) in an advantageous manner and without the complex additional devices, even for power by 3 KW is possible.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Heizung aus mehreren in einer den Einschaltstrom begrenzenden Schaltung angeordneten PTC-Widerständen (Kaltleitern) besteht und durch die Trocknersteuerung schaltbar ist.According to the invention, this object is achieved in that the heater consists of several in one which limits the inrush current Circuit arranged PTC resistors (PTC thermistors) and can be switched by the dryer control.

Bei einem Wäschetrockner mit einer durch ein Programmschaltwerk oder einen Zeitschalter betätigten Trocknersteuerung werden nach einer ersten Ausführungsform nur so viele PTC-Widerstände an Spannung gelegt, daß deren Einschaltstromspitze einen bestimmten Wert nicht überschreitet. Die weiteren PTC-Widerstände sind dann um eine Zeitkonstante versetzt durch das Programmschaltwerk oder den Zeitschalter zuschaltbar, derart, daß die zulässige Stromspitze wiederum nicht überschritten wird. Die Zeitkonstante, um die versetzt weitere PTC-Wider-In the case of a tumble dryer with a program switch or a timer-operated dryer control, according to a first embodiment, there are only so many PTC resistors connected to voltage so that the peak inrush current does not exceed a certain value. The other PTC resistors can then be switched on by the program switch or the timer, offset by a time constant, in such a way that that the permissible current peak is again not exceeded. The time constant by which additional PTC resistors

809822/00^3809822/00 ^ 3

EBHZ-76/83 22.11.1976EBHZ-76/83 November 22, 1976

Ul/gfUl / gf

stände in den Heizstromkreis eingeschaltet werden, ergibt sich aus der Zeitdauer bis der PTC-Widerstand eine entsprechend hohe Temperatur erreicht.states are switched on in the heating circuit, results from the time it takes for the PTC resistor to reach a correspondingly high temperature.

Eine Verkürzung der Einschaltdauer aller Heizwiderstände ohne Überschreiten der zulässigen Einschaltstromstärke ist möglich, wenn die zu Beginn des Trockenprogrammes noch nicht eingeschalteten PTC-Widerstände vom erwärmten Trockenluftstrom beaufschlagt und dadurch vorgewärmt werden. Ein Vorwärmen der zuzuschaltenden Widerstände ist auch dadurch möglich, daß diese Widerstände in Wärmekontakt mit den beheizten Widerständen stehen.A reduction in the switch-on time of all heating resistors without exceeding the permissible inrush current strength is possible if the PTC resistors, which are not yet switched on at the beginning of the drying program, are affected by the heated drying air flow applied and thereby preheated. The resistors to be switched on can also be preheated by that these resistors are in thermal contact with the heated resistors.

Bei Wäschetrocknernmit elektronischer Trocknersteuerung wird den später einzuschaltenden PTC-Widerständen vorzugsweise ein Thermofühler oder Bimetall zugeordnet, welche nach Erreichen einer vorgegebenen Temperatur diese Heizelemente an Spannung legen. Dabei ist es ebenfalls möglich, die nachzuschaltenden Heizelemente über den Trockenluftstrom oder durch die wirksamen Heizelemente vorzuheizen.For tumble dryers with electronic dryer control a thermal sensor or bimetal is preferably assigned to the PTC resistors to be switched on later, which after reaching a specified temperature, apply voltage to these heating elements. It is also possible to use the to preheat downstream heating elements via the dry air flow or the effective heating elements.

In vorteilhafter Ausführung sind die PTC-Widerstände in Serie geschaltet und durch die Trocknersteuerung nach Beginn des Trockenprogramms zeit- oder temperaturabhängig in eine Parallel- oder Teilparallelschaltung umschaltbar.In an advantageous embodiment, the PTC resistors are connected in series and controlled by the dryer after the start of the drying program can be switched to a parallel or partially parallel circuit depending on the time or temperature.

809822/0063809822/0063

Claims (4)

^653322 EBHZ-76/83 22.11.1976 Ul/gf Patentansprüche^ 653322 EBHZ-76/83 11/22/1976 Ul / gf patent claims 1. Wäschetrockner mit einer Trocknersteuerung1. Tumble dryer with a dryer control und einer PTC-Widerstandsheizung, dadurch gekennzeichnet, daß die Heizung aus mehreren in einer den Einschaltstrom begrenzenden Schaltung angeordneten PTC-Widerständen (Kaltleitern) be-» steht und durch die Trocknersteuerung schaltbar ist.and a PTC resistance heater, characterized in that the heater consists of several in one limiting the inrush current Circuit arranged PTC resistors (PTC thermistors). and can be switched by the dryer control. 2. Wäschetrockner nach Anspruch 1, dadurch gekennzeichnet, daß bei Beginn des Trockenprogramms die PTC-Widerstände in Serie geschaltet und nach Erreichen einer entsprechend hohen Temperatur oder einer dem Erreichen dieser Temperatur entsprechenden Zeitkonstante in eine Parallel oder Teilparallelschaltung umschaltbar sind.2. Tumble dryer according to claim 1, characterized in that that at the beginning of the drying program the PTC resistors are connected in series and after reaching one accordingly high temperature or a time constant corresponding to the reaching of this temperature into a parallel or Partial parallel connection are switchable. 3. Wäschetrockner nach Anspruch 1, dadurch gekennzeichnet, daß den während des Trockenprogramms zuschaltbaren PTC-Widerständen ein Zeitglied, Thermofühler, Bimetall oder dgl. der Trocknersteuerung zugeordnet ist und die Widerstände zeit- bzw. temperaturgesteuert in den Heizstromkreis einschaltbar sind.3. Clothes dryer according to claim 1, characterized in that the switchable during the drying program PTC resistors, a timing element, thermal sensor, bimetal or the like. The dryer control is assigned and the resistors can be switched on in the heating circuit in a time or temperature-controlled manner. 4. Wäschetrockner nach Anspruch 1 bis 3, dadurch gekennzeichnet, daß die während des Trockenprogramms zuschaltbaren PTC-Widerstände in Wärmekontakt mit den bereits beheizten PTC-Widerständen stehen oder durch den Trockenluftstrom vorheizbar sind.4. Tumble dryer according to claim 1 to 3, characterized in that the switchable during the drying program PTC resistors are in thermal contact with the already heated PTC resistors or due to the dry air flow are preheatable. 809822/0063809822/0063
DE2653322A 1976-11-24 1976-11-24 Clothes dryer Expired DE2653322C2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE2653322A DE2653322C2 (en) 1976-11-24 1976-11-24 Clothes dryer
GB46814/77A GB1553145A (en) 1976-11-24 1977-11-10 Laundry drier
NL7712547A NL7712547A (en) 1976-11-24 1977-11-15 WASHER DRYER.
CH1406977A CH620723A5 (en) 1976-11-24 1977-11-17 Laundry drier
IT29947/77A IT1088287B (en) 1976-11-24 1977-11-23 DRYER WITH RESISTANCE DRYING AND HEATING WITH POSITIVE TEMPERATURE COEFFICIENT

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2653322A DE2653322C2 (en) 1976-11-24 1976-11-24 Clothes dryer

Publications (2)

Publication Number Publication Date
DE2653322A1 true DE2653322A1 (en) 1978-06-01
DE2653322C2 DE2653322C2 (en) 1982-04-22

Family

ID=5993843

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2653322A Expired DE2653322C2 (en) 1976-11-24 1976-11-24 Clothes dryer

Country Status (5)

Country Link
CH (1) CH620723A5 (en)
DE (1) DE2653322C2 (en)
GB (1) GB1553145A (en)
IT (1) IT1088287B (en)
NL (1) NL7712547A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2597222A1 (en) * 1986-04-11 1987-10-16 Ciapem Apparatus equipped with an electrical heating resistance

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10022613C2 (en) * 2000-05-09 2002-04-25 Whirlpool Co Condensation dryer with heat pump and additional resistance heating
DE10022608C1 (en) * 2000-05-09 2001-10-25 Whirlpool Co Laundry dryer has positive temperature coefficient heating element in thermal contact with negative temperature coefficient heating element

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2559035A1 (en) * 1975-03-24 1976-10-07 Hitachi Ltd LAUNDRY DRYERS

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2559035A1 (en) * 1975-03-24 1976-10-07 Hitachi Ltd LAUNDRY DRYERS

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2597222A1 (en) * 1986-04-11 1987-10-16 Ciapem Apparatus equipped with an electrical heating resistance

Also Published As

Publication number Publication date
IT1088287B (en) 1985-06-10
NL7712547A (en) 1978-05-26
GB1553145A (en) 1979-09-19
DE2653322C2 (en) 1982-04-22
CH620723A5 (en) 1980-12-15

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Legal Events

Date Code Title Description
OD Request for examination
8120 Willingness to grant licences paragraph 23
D2 Grant after examination
8363 Opposition against the patent
8339 Ceased/non-payment of the annual fee