EP2516719A2 - Method for controlling a drying cycle in a clothes dryer, and machine implementing said method - Google Patents
Method for controlling a drying cycle in a clothes dryer, and machine implementing said methodInfo
- Publication number
- EP2516719A2 EP2516719A2 EP10819682A EP10819682A EP2516719A2 EP 2516719 A2 EP2516719 A2 EP 2516719A2 EP 10819682 A EP10819682 A EP 10819682A EP 10819682 A EP10819682 A EP 10819682A EP 2516719 A2 EP2516719 A2 EP 2516719A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- temperature
- laundry
- humidity
- air
- degree
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000001035 drying Methods 0.000 title claims abstract description 24
- 238000010438 heat treatment Methods 0.000 claims description 9
- 230000007423 decrease Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 239000003990 capacitor Substances 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 230000008901 benefit Effects 0.000 description 6
- 238000005265 energy consumption Methods 0.000 description 6
- 238000001816 cooling Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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
- D06F58/32—Control of operations performed in domestic laundry dryers
- D06F58/34—Control of operations performed in domestic laundry dryers characterised by the purpose or target of the control
- D06F58/36—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry
- D06F58/38—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry of drying, e.g. to achieve the target humidity
-
- 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
- D06F2103/02—Characteristics of laundry or load
- D06F2103/08—Humidity
-
- 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
- D06F2103/02—Characteristics of laundry or load
- D06F2103/08—Humidity
- D06F2103/10—Humidity expressed as capacitance or resistance
-
- 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
- D06F2103/28—Air properties
- D06F2103/32—Temperature
-
- 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
Definitions
- Clothes dryers are typically machines expressly dedicated to that purpose, or else they may be machines carrying out both washing and drying processes, in which case they are usually called “washing/drying machines”.
- ventilation means are turned on during said cooling step in order to promote forced convection to cool the laundry, further increasing energy consumption.
- the present invention aims at solving these and other problems through a method in accordance with the appended claim 1.
- this is accomplished by controlling the air heating device as a function of a parameter indicating the residual humidity of the laundry being treated. In this manner it is possible to change the air temperature so that the drying action is effective throughout the cycle, thus preventing the above-described problems from arising.
- Fig. 1 shows a diagram of the present method as a function of time, temperature and resistivity.
- said method provides for controlling the quantity of heat supplied to the laundry in the drum by setting operating parameters of an air heating device.
- the target temperature is established in a manner such that it changes as a function of the degree of humidity of the laundry in the drum.
- the detection of the degree of humidity of the laundry may occur in many different ways, all known in the art.
- the conductivity sensor can be schematised in this example as a capacitor with its terminals in contact with the laundry: the capacitor's discharge time is inversely proportional to the degree of humidity of the laundry; by knowing the capacitor's discharge time, one can easily deduce the resistivity (which is inverse thereto), shown by line 2 in Fig. 1.
- the electric resistor control causes the detected temperature 1 to follow the trend of the target temperature 3.
- T ob Tj-K* (cond att -condj)
- T ob is the target temperature value
- Tj is the initialisation temperature value (which will be discussed hereafter),
- K is a constant which takes into account the conversions of the units of measure
- cond att is the conductivity value measured in each step of the algorithm (inverse to resistivity in the same conditions)
- condi is the conductivity value measured at the start of the drying cycle (inverse to resistivity in the same conditions).
- Tj (initialisation temperature) is chosen so as to correspond to the value of the temperature detected at the beginning of the drying cycle.
- the algorithm is used several times during the laundry drying cycle, e.g. every time the resistivity is measured, so as to have a continuous trend.
- the heating elements are controlled as a function of the difference between the target temperature and the measured temperature of the circulating air, so that the quantity of heat supplied to the circulating air is such that the temperature of the latter will tend towards the value of the target temperature.
- the machine implementing the method discussed so far it will comprise at least one drum in which laundry can be placed to be subjected to a drying treatment, at least one humidity sensor for detecting the degree of humidity of the laundry, at least one temperature sensor for detecting the temperature of the air circulating within the drum, at least one control unit connected to the humidity and temperature sensors and adapted to control one or more heaters in a manner such as to cause the circulating air temperature to tend towards a target temperature value calculated by the control unit as a function of the degree of humidity detected by the humidity sensor.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Control Of Washing Machine And Dryer (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT001035A ITTO20091035A1 (en) | 2009-12-23 | 2009-12-23 | METHOD FOR THE CONTROL OF A DRYING CYCLE IN A CLOTHING AND MACHINE DRYING MACHINE THAT MAKES THIS METHOD |
PCT/IB2010/056015 WO2011077391A2 (en) | 2009-12-23 | 2010-12-22 | Method for controlling a drying cycle in a clothes dryer, and machine implementing said method |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2516719A2 true EP2516719A2 (en) | 2012-10-31 |
EP2516719B1 EP2516719B1 (en) | 2013-11-20 |
Family
ID=42555587
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10819682.5A Active EP2516719B1 (en) | 2009-12-23 | 2010-12-22 | Method for controlling a drying cycle in a clothes dryer, and machine implementing said method |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP2516719B1 (en) |
CN (1) | CN102656310B (en) |
ES (1) | ES2446723T3 (en) |
IT (1) | ITTO20091035A1 (en) |
PT (1) | PT2516719E (en) |
WO (1) | WO2011077391A2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9371609B2 (en) | 2014-06-24 | 2016-06-21 | General Electric Company | Dryer appliances and methods for operating same |
US10184208B2 (en) | 2014-07-25 | 2019-01-22 | Electrolux Appliances Aktiebolag | Laundry drying apparatus with heater unit having adjustable temperature thresholds |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2653602B1 (en) * | 2012-04-19 | 2016-12-28 | Whirpool Corporation | Method for detecting the cycle termination of a household tumble dryer |
CN104200125B (en) * | 2014-09-23 | 2017-03-08 | 珠海格力电器股份有限公司 | Method, device and system for acquiring clothes drying prediction time |
WO2016098008A1 (en) | 2014-12-19 | 2016-06-23 | Indesit Company S.P.A. | Method for controlling a washing/drying machine for executing a fast cycle, and washing/drying machine configured to carry out said method |
WO2016098019A1 (en) | 2014-12-19 | 2016-06-23 | Indesit Company S.P.A. | Method for controlling a machine adapted to perform at least a drying cycle, and machine configured to carry out said method |
DE102015217667A1 (en) * | 2015-09-15 | 2017-03-16 | E.G.O. Elektro-Gerätebau GmbH | Method for operating a tumble dryer |
US10260194B2 (en) | 2016-07-15 | 2019-04-16 | Whirlpool Corporation | Laundry treating appliance with a sensor |
CN107675459B (en) * | 2017-09-12 | 2019-10-25 | 美的集团武汉制冷设备有限公司 | Airhandling equipment control method, equipment and readable storage medium storing program for executing |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60174194A (en) | 1984-02-20 | 1985-09-07 | 三洋電機株式会社 | Controller of clothing dryer |
US7005618B2 (en) * | 2003-06-27 | 2006-02-28 | General Electric Company | Clothes dryer apparatus and method |
KR101063701B1 (en) * | 2003-11-03 | 2011-09-07 | 엘지전자 주식회사 | Dryer Load Control Method |
US9249539B2 (en) * | 2006-09-25 | 2016-02-02 | Ecolab Inc. | Determination of dryness of textiles in a dryer |
-
2009
- 2009-12-23 IT IT001035A patent/ITTO20091035A1/en unknown
-
2010
- 2010-12-22 WO PCT/IB2010/056015 patent/WO2011077391A2/en active Application Filing
- 2010-12-22 CN CN201080058805.1A patent/CN102656310B/en not_active Expired - Fee Related
- 2010-12-22 EP EP10819682.5A patent/EP2516719B1/en active Active
- 2010-12-22 PT PT108196825T patent/PT2516719E/en unknown
- 2010-12-22 ES ES10819682.5T patent/ES2446723T3/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2011077391A2 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9371609B2 (en) | 2014-06-24 | 2016-06-21 | General Electric Company | Dryer appliances and methods for operating same |
US10184208B2 (en) | 2014-07-25 | 2019-01-22 | Electrolux Appliances Aktiebolag | Laundry drying apparatus with heater unit having adjustable temperature thresholds |
Also Published As
Publication number | Publication date |
---|---|
ES2446723T3 (en) | 2014-03-10 |
WO2011077391A2 (en) | 2011-06-30 |
PT2516719E (en) | 2014-02-17 |
WO2011077391A3 (en) | 2011-11-10 |
CN102656310B (en) | 2015-04-29 |
CN102656310A (en) | 2012-09-05 |
EP2516719B1 (en) | 2013-11-20 |
ITTO20091035A1 (en) | 2011-06-24 |
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