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WO2007077170A2 - A household appliance - Google Patents

A household appliance Download PDF

Info

Publication number
WO2007077170A2
WO2007077170A2 PCT/EP2006/070176 EP2006070176W WO2007077170A2 WO 2007077170 A2 WO2007077170 A2 WO 2007077170A2 EP 2006070176 W EP2006070176 W EP 2006070176W WO 2007077170 A2 WO2007077170 A2 WO 2007077170A2
Authority
WO
WIPO (PCT)
Prior art keywords
liquid
temperature
chamber
heater
household appliance
Prior art date
Application number
PCT/EP2006/070176
Other languages
French (fr)
Other versions
WO2007077170A3 (en
Inventor
Namik Yilmaz
Original Assignee
Arcelik Anonim Sirketi
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 Arcelik Anonim Sirketi filed Critical Arcelik Anonim Sirketi
Publication of WO2007077170A2 publication Critical patent/WO2007077170A2/en
Publication of WO2007077170A3 publication Critical patent/WO2007077170A3/en

Links

Classifications

    • 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
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0227—Applications
    • H05B1/0252—Domestic applications
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4287—Temperature measuring or regulating arrangements
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J36/00—Parts, details or accessories of cooking-vessels
    • A47J36/32—Time-controlled igniting mechanisms or alarm devices
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4285—Water-heater arrangements
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/12—Water temperature
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/06—Water heaters

Definitions

  • the present invention relates to a household appliance wherein the temperature of the heated water can be measured accurately.
  • an NTC sensor Negative Thermal Coefficient
  • a voltage divider circuit the resistance of which changes, decreasing with temperature and the resistance change can be detected by means of a voltage divider circuit.
  • the object of the present invention is to design a household appliance wherein the temperature of the liquids utilized during operation can be measured accurately and inexpensively without being in contact with the heated liquid.
  • the household appliance comprises a heater that heats the liquids within, a control card, connected to the heater and feeds the heater, having a measurement circuit with a resistor. Measurement the temperature of the water used in the household appliances is maintained by monitoring the current that passes over the heater that heats the water. The resistance of the heater changes with respect to the temperature of the water heated. Accordingly, the current drawn by the heater changes and the current drawn by the resistor in the circuit that feeds the heater also changes together with the heater. The temperature of the water can easily be determined by the control card that monitors this change. Consequently, the temperature of the water can be determined without putting in an extra sensor in the chamber containing the liquid.
  • Rgure 1 - is the schematic view of a household appliance.
  • Rgure 2 - is the schematic view of a measurement circuit.
  • the household appliance (1) comprises a chamber (5) wherein the liquid is contained, a heater (2) situated in the chamber (5) providing the heating of the liquid in the chamber (5), the resistance value of which changes with respect to the liquid it is situated in, and a control card (3) that regulates the operation thereof.
  • the control card (3) comprises a measurement circuit (4) situated outside the chamber (5), providing to determine the temperature of the heated liquid.
  • the measurement circuit (4) comprises a resistor (6) connected parallel to the line coming from the heater (2) that does not contact the liquid in the chamber (5).
  • the control card (3) constantly monitors the current on the resistor (6) with the help of the measurement circuit (4) for safety and control purposes, providing to correlate the current change with the temperature variation values predetermined by the producer with experimental data and to determine the liquid temperature by e.g. a micro controller (M).
  • M micro controller
  • the resistor (6) acts as a means for measuring the temperature of water.
  • a resistor (6) of high sensitivity with low value (10 mW,, 20 mW,, etc) is utilized.
  • the heater (2) is used in heating the water necessary for washing the laundry and the washing water temperature in all phases of washing is determined by monitoring the current change of the resistor (6) connected to the heater (2).
  • the control card (3) determines how much the heater (2) has to operate according to the determined temperature and the heater (2) is energized and/or de-energized at the required time for as long as required in the required washing phases. Consequently while heating is done by the heater (2) also the temperature of the washing water is measured sensitively and safely without using any extra sensors.

Landscapes

  • Cookers (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)

Abstract

The present invention relates to a household appliance (1) comprising a control card (3) that provides the temperature of the liquid used in washing or heating to be measured accurately without contacting the liquid.

Description

Description A HOUSEHOLD APPLIANCE
[0001] The present invention relates to a household appliance wherein the temperature of the heated water can be measured accurately.
[0002] In household appliances, in tea, coffee machines, washers or dishwashers and the like wherein the water has to be heated to a certain temperature; the water temperature has to be detected accurately for purposes of control and safety.
[0003] In conventional applications, an NTC sensor (Negative Thermal Coefficient) is used in the chamber wherein the water is heated, the resistance of which changes, decreasing with temperature and the resistance change can be detected by means of a voltage divider circuit. Even though the use of an NTC sensor is practical and inexpensive, alternative temperature detecting methods are needed due to reasons like assembly problems, causation of electric leakage, and the nonlinearity of the resistance value.
[0004] The object of the present invention is to design a household appliance wherein the temperature of the liquids utilized during operation can be measured accurately and inexpensively without being in contact with the heated liquid.
[0005] The household appliance designed to fulfill the object of the present invention is explicated in the first claim whereas its other features are explicated in the respective claims.
[0006] In the embodiment of the present invention, the household appliance comprises a heater that heats the liquids within, a control card, connected to the heater and feeds the heater, having a measurement circuit with a resistor. Measurement the temperature of the water used in the household appliances is maintained by monitoring the current that passes over the heater that heats the water. The resistance of the heater changes with respect to the temperature of the water heated. Accordingly, the current drawn by the heater changes and the current drawn by the resistor in the circuit that feeds the heater also changes together with the heater. The temperature of the water can easily be determined by the control card that monitors this change. Consequently, the temperature of the water can be determined without putting in an extra sensor in the chamber containing the liquid.
[0007] The household designed to fulfill the object of the present invention is illustrated in attached figures, where:
[0008] Rgure 1 - is the schematic view of a household appliance. [0009] Rgure 2 - is the schematic view of a measurement circuit.
[0010] The elements illustrated in the figures are numbered as follows:
1. Household appliance
2. Heater
3. Control card
4. Measurement circuit
5. Chamber
6. Resistor
[0011] The household appliance (1) comprises a chamber (5) wherein the liquid is contained, a heater (2) situated in the chamber (5) providing the heating of the liquid in the chamber (5), the resistance value of which changes with respect to the liquid it is situated in, and a control card (3) that regulates the operation thereof.
[0012] The control card (3) comprises a measurement circuit (4) situated outside the chamber (5), providing to determine the temperature of the heated liquid. The measurement circuit (4) comprises a resistor (6) connected parallel to the line coming from the heater (2) that does not contact the liquid in the chamber (5). In the embodiment of the present invention, the control card (3) constantly monitors the current on the resistor (6) with the help of the measurement circuit (4) for safety and control purposes, providing to correlate the current change with the temperature variation values predetermined by the producer with experimental data and to determine the liquid temperature by e.g. a micro controller (M). The resistor (6) acts as a means for measuring the temperature of water.
[0013] In the embodiment of the present invention, as the temperature of the heater (2) being in contact with liquid in the chamber (5) changes, the resistance of the heater (2) and thus the current it draws changes with respect to the temperature of the liquid it is situated in. In the meantime, the temperature and the current values also change on the resistor (6) connected to the heater (2) but not in contact with the heated liquid, and the current that flows therefrom decreases. At the same time, the current variation effect emerging on the heater (2) is monitored by the measurement unit (4) through the resistor (6) and the temperature values of the liquid that is tried to be heated are determined by the control card (3) with the normalized current variation values determined by the producer.
[0014] In an embodiment of the present invention, a resistor (6) of high sensitivity with low value (10 mW,, 20 mW,, etc) is utilized.
[0015] In the embodiment of the present invention wherein the household appliance (1) is a washer, the heater (2) is used in heating the water necessary for washing the laundry and the washing water temperature in all phases of washing is determined by monitoring the current change of the resistor (6) connected to the heater (2). The control card (3) determines how much the heater (2) has to operate according to the determined temperature and the heater (2) is energized and/or de-energized at the required time for as long as required in the required washing phases. Consequently while heating is done by the heater (2) also the temperature of the washing water is measured sensitively and safely without using any extra sensors. Hereby, with the embodiment of the present invention, in household appliances (1) wherein the liquids contained therein are heated, heat transfer is provided with the heater (2) that heats the liquids and also measures the temperature of the heated liquid without using extra sensors. Consequently, cost advantage, ease of assembly and maintenance are provided. Furthermore, since measurement is done directly from the heat source, sensitivity of measurement values is maintained and safe operation is provided since probable electric leaks are prevented.

Claims

Claims
[0001] A household appliance (1) comprising a chamber (5) wherein the liquid are contained, a heater (2) situated in the chamber (5) providing the heating of liquids in the chamber (5), the resistance value of which changes with respect to the liquid it is situated in, and a control card (3) that regulates the operation thereof, and characterized by a control card (3) having a measurement circuit (4) situated outside the chamber (5), for determining the temperature of the heated liquid, comprising a resistor (6) not in contact with the liquid in the chamber (5), connected parallel to the line coming from the heater (2), providing the constant monitoring of the current on the resistor (6) with the help of the measurement citcuit (4), to correlate the change of current with the temperature variation values predetermined by the producer with experimental data and to determine the liquid temperature.
[0002] A household appliance (1) as in Claim 1, characterized by a high sensitivity resistor (6).
[0003] A household appliance (1) as in Claim 1, characterized by a small Ohm value resistor (6).
PCT/EP2006/070176 2006-01-05 2006-12-22 A household appliance WO2007077170A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TRTR2006/00068 2006-01-05
TR200600068 2006-01-05

Publications (2)

Publication Number Publication Date
WO2007077170A2 true WO2007077170A2 (en) 2007-07-12
WO2007077170A3 WO2007077170A3 (en) 2007-09-07

Family

ID=38196587

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/070176 WO2007077170A2 (en) 2006-01-05 2006-12-22 A household appliance

Country Status (1)

Country Link
WO (1) WO2007077170A2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012089471A1 (en) 2010-12-29 2012-07-05 Arcelik Anonim Sirketi A washer comprising a conductivity and temperature sensor
CN111528298A (en) * 2020-05-12 2020-08-14 国网浙江省电力有限公司湖州供电公司 Electric tea frying system capable of recovering heating characteristic of manual tea frying

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4736091A (en) * 1986-09-10 1988-04-05 Watlow/Winona, Inc. Integral sensor controller for an electrical heater
EP0579947A1 (en) * 1992-07-23 1994-01-26 Zanussi Elettrodomestici S.p.A. Washing machine with arrangement for controlling the temperature of the electric water heating elements
DE4342143A1 (en) * 1993-12-10 1995-06-14 Fraunhofer Ges Forschung Temperature control device for cooking pots with integral base heating
DE102005029921A1 (en) * 2005-06-22 2007-01-04 BSH Bosch und Siemens Hausgeräte GmbH Heating device for fluids and household appliance

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4736091A (en) * 1986-09-10 1988-04-05 Watlow/Winona, Inc. Integral sensor controller for an electrical heater
EP0579947A1 (en) * 1992-07-23 1994-01-26 Zanussi Elettrodomestici S.p.A. Washing machine with arrangement for controlling the temperature of the electric water heating elements
DE4342143A1 (en) * 1993-12-10 1995-06-14 Fraunhofer Ges Forschung Temperature control device for cooking pots with integral base heating
DE102005029921A1 (en) * 2005-06-22 2007-01-04 BSH Bosch und Siemens Hausgeräte GmbH Heating device for fluids and household appliance

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012089471A1 (en) 2010-12-29 2012-07-05 Arcelik Anonim Sirketi A washer comprising a conductivity and temperature sensor
CN111528298A (en) * 2020-05-12 2020-08-14 国网浙江省电力有限公司湖州供电公司 Electric tea frying system capable of recovering heating characteristic of manual tea frying
CN111528298B (en) * 2020-05-12 2023-04-07 国网浙江省电力有限公司湖州供电公司 Electric tea frying system capable of recovering heating characteristic of manual tea frying

Also Published As

Publication number Publication date
WO2007077170A3 (en) 2007-09-07

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