WO1998059174A1 - Electronic control method for drain pumps used in electrical home appliances - Google Patents

Electronic control method for drain pumps used in electrical home appliances Download PDF

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Publication number
WO1998059174A1
WO1998059174A1 PCT/TR1998/000011 TR9800011W WO9859174A1 WO 1998059174 A1 WO1998059174 A1 WO 1998059174A1 TR 9800011 W TR9800011 W TR 9800011W WO 9859174 A1 WO9859174 A1 WO 9859174A1
Authority
WO
WIPO (PCT)
Prior art keywords
γçó
drain pump
current
microprocessor
loaded
Prior art date
Application number
PCT/TR1998/000011
Other languages
French (fr)
Inventor
Semsettin Eksert
Ibrahim Ugurlu
Faruk Tan
Original Assignee
Arçelik A.S.
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 Arçelik A.S. filed Critical Arçelik A.S.
Priority to EP98932707A priority Critical patent/EP0920591B1/en
Priority to AU82525/98A priority patent/AU8252598A/en
Priority to AT98932707T priority patent/ATE242430T1/en
Priority to DE69815261T priority patent/DE69815261T2/en
Publication of WO1998059174A1 publication Critical patent/WO1998059174A1/en

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
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/083—Liquid discharge or recirculation arrangements
    • D06F39/085—Arrangements or adaptations of pumps
    • 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
    • D06F33/00—Control of operations performed in washing machines or washer-dryers 
    • D06F33/30—Control of washing machines characterised by the purpose or target of the control 
    • D06F33/47—Responding to irregular working conditions, e.g. malfunctioning of pumps 
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
    • F04D15/0218—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid the condition being a liquid level or a lack of liquid supply
    • F04D15/0236—Lack of liquid level being detected by analysing the parameters of the electric drive, e.g. current or power consumption
    • 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
    • D06F2103/44—Current or voltage
    • D06F2103/48—Current or voltage of the motor driving the pump
    • 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
    • D06F2105/58—Indications or alarms to the control system or to the user
    • 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
    • D06F33/00—Control of operations performed in washing machines or washer-dryers 
    • D06F33/50—Control of washer-dryers characterised by the purpose or target of the control
    • D06F33/72—Control of the energy or water consumption

Definitions

  • the invention is related to a method that provides electronic control of working periods of the synchronous or asynchronous drain pump motors used in electrical home appliances such as dish washing machines and washing machines.
  • the drain pump In the control systems of the existing dish washing and washing machines, the drain pump is in operated along a fixed operating time period at places required by the washing program. This fixed time period, is over the time needed to drain the water out by the drain pump under normal conditions. For example, a drain pump of 16 liters/minute, can empty the water content of 5 liters of water in a washing machine in a short time period but, it is operated for a fixed time period of 1 minute. Similarly, drain pumps are operated half or more of the operating periods in the existing control systems without need for it. This unnecessary operation, despite water is drained by the drain pump, continues without water, to complete the operation period.
  • the drain pump operating without water is forming the highest source of noise in the machine that is sucking air from it. Despite there is no water in the machine, the drain pump continues to operate and results in unnecessary energy consumption. For example, in "normal" program of dish washing machine, a drain pump of 34W power operating at an average of 5.5 minutes, uses 3.2 wH energy. The drain pump when operated without need for it at 50% of this period. 1.6 wH unnecessary energy consumption is faced with.
  • the drain pump draws different currents from the network while there is water in the machine (loaded) and while there is no water in it (unloaded). For example, a drain pump of 34W, if started to operate with a load over 3.5 liters, draws more or less 125 mA current but after the water in the machine is drained, the current drawn by the pump from the network is decreased to about 110 mA.
  • the objective of this invention is to provide a method by taking the difference of current drawn from the network by the drain pump while operating with and without load as the base, is to control the pump operating time, the values of the current drawn by the pump with electronic control and in parallel to this, to prevent the energy consumption arising out of unnecessary operation, to decrease the noise and to shorten the duration of the program.
  • Figure 1 is the electronic circuit diagram that controls the pump with microprocessor 1) and measures the currents drawn by the drain pump (2).
  • Figure 2 is the circuit diagram in which " current transformer” (6) is used instead of " Manganin based resistance” (3).
  • FIG. 3 is the circuit diagram in which a "Hall effect transistor” (7) is used instead of " Manganin based resistance” (3).
  • drain pump is controlled by a microprocessor 1).
  • laboratory experiments are carried out and the difference of the currents drawn by the pump while operating with and without load are recorded. These values are saved to the memory of a microprocessor (1).
  • a circuit formed by a "manganin based resistance” (3), a “ op-amp” (4) and a “ AC-DC converter” (5) is used ( Figure 1).
  • a " current transformer” (6) or a “Hall effect transistor” (7) can also be used.
  • a directly proportional voltage is formed on the manganin based resistance (3) which is connected to the line from the drain pump (2) over the microprocessor (1).
  • This voltage is transmitted to a op-amp (4) circuit such that the highest value is increased to 5V AC.
  • the voltage increasing at 0-5 V AC level in Op-amp (4) circuit is converted into direct voltage in the AC-DC converter (5) circuit and transmitted to the microprocessor(l). This information coming into the microprocessor 1) as analog is later converted into digital information. If the voltage transmitted to microprocessor (1) is constantly above 5V, it means that the drain pump (2) is blocked.
  • the current drawn is started to be measured.
  • This time period being dependent on take off time of the pump, may change between 5-10 seconds.
  • This measurement period changes depending on the microprocessor and software used. In the present method, the time required for this is 640 ⁇ s with PIC 16C74 microprocessor.
  • the values recorded during the first five seconds after starting the measurements are compared with each other and the largest value is saved in the memory as the operation loaded value (I' ⁇ oaded )• To compare the values with each other, a time period which is different from five seconds, may be preferred.

Abstract

The invention is related to a method that provides electronic control of working periods of the synchronous or asynchronous drain pump motors used in electrical home appliances such as dish washing machines and washing machines. During normal use of the home appliance, while the drain pump (2) is operating, the values of the current taken is audited by a microprocessor (1) and compared with the previous values of 'rates of current drawn while operating loaded (while there is water in the machine) and without load (while there is no water)' which are loaded into the memory of the microprocessor and when the desired balance is attained, the drain pump, by arriving at a decision that operation is done without water, stops. To measure the current drawn by the drain pump (2), a circuit formed by a 'resistance based on manganin' (3) an 'op-amp' (4) and an 'ac-dc converter' (5), is being used.

Description

ELECTRONIC CONTROL METHOD FOR DRAIN PUMPS USED IN
ELECTRICAL HOME APPLIANCES
The invention is related to a method that provides electronic control of working periods of the synchronous or asynchronous drain pump motors used in electrical home appliances such as dish washing machines and washing machines.
In the control systems of the existing dish washing and washing machines, the drain pump is in operated along a fixed operating time period at places required by the washing program. This fixed time period, is over the time needed to drain the water out by the drain pump under normal conditions. For example, a drain pump of 16 liters/minute, can empty the water content of 5 liters of water in a washing machine in a short time period but, it is operated for a fixed time period of 1 minute. Similarly, drain pumps are operated half or more of the operating periods in the existing control systems without need for it. This unnecessary operation, despite water is drained by the drain pump, continues without water, to complete the operation period.
The drain pump operating without water is forming the highest source of noise in the machine that is sucking air from it. Despite there is no water in the machine, the drain pump continues to operate and results in unnecessary energy consumption. For example, in "normal" program of dish washing machine, a drain pump of 34W power operating at an average of 5.5 minutes, uses 3.2 wH energy. The drain pump when operated without need for it at 50% of this period. 1.6 wH unnecessary energy consumption is faced with.
The drain pump, during its operation, draws different currents from the network while there is water in the machine (loaded) and while there is no water in it (unloaded). For example, a drain pump of 34W, if started to operate with a load over 3.5 liters, draws more or less 125 mA current but after the water in the machine is drained, the current drawn by the pump from the network is decreased to about 110 mA.
The objective of this invention, is to provide a method by taking the difference of current drawn from the network by the drain pump while operating with and without load as the base, is to control the pump operating time, the values of the current drawn by the pump with electronic control and in parallel to this, to prevent the energy consumption arising out of unnecessary operation, to decrease the noise and to shorten the duration of the program.
In order to reach to these objectives, the proposed method will be explained herebelow with reference to the attached drawings, wherein;
Figure 1 is the electronic circuit diagram that controls the pump with microprocessor 1) and measures the currents drawn by the drain pump (2).
Figure 2 is the circuit diagram in which " current transformer" (6) is used instead of " Manganin based resistance" (3).
Figure 3 is the circuit diagram in which a "Hall effect transistor" (7) is used instead of " Manganin based resistance" (3). In the method according to this invention, drain pump is controlled by a microprocessor 1). To realize this, laboratory experiments are carried out and the difference of the currents drawn by the pump while operating with and without load are recorded. These values are saved to the memory of a microprocessor (1).
After this phase, current ratios with and without load (I,0,lded / Iunloaded) re saved in a microprocessor along with the program to be used.
During operation, to measure the current drawn by the drain pump(2), a circuit formed by a "manganin based resistance" (3), a " op-amp" (4) and a " AC-DC converter" (5) is used (Figure 1). In this circuit, instead of "manganin based resistance" (3), a " current transformer" (6) or a "Hall effect transistor" (7) can also be used.
A directly proportional voltage is formed on the manganin based resistance (3) which is connected to the line from the drain pump (2) over the microprocessor (1). This voltage is transmitted to a op-amp (4) circuit such that the highest value is increased to 5V AC. The voltage increasing at 0-5 V AC level in Op-amp (4) circuit, is converted into direct voltage in the AC-DC converter (5) circuit and transmitted to the microprocessor(l).This information coming into the microprocessor 1) as analog is later converted into digital information. If the voltage transmitted to microprocessor (1) is constantly above 5V, it means that the drain pump (2) is blocked.
During normal use of the dish washing machine, after 7 seconds from the moment of entrance into operation of the drain pump(2), the current drawn is started to be measured. This time period, being dependent on take off time of the pump, may change between 5-10 seconds. This measurement period changes depending on the microprocessor and software used. In the present method, the time required for this is 640μs with PIC 16C74 microprocessor. The values recorded during the first five seconds after starting the measurements are compared with each other and the largest value is saved in the memory as the operation loaded value (I'ιoaded )• To compare the values with each other, a time period which is different from five seconds, may be preferred. Following the saving of the current for operation loaded ((I'ιoaded) with each measurement made the saved current for operation loaded is compared and the ratio determined (!' loaded / I easuied) is compared to the ratio of operation with and without load (Iioaded / ^unloaded) which was saved in the memory of the microprocessor during previous laboratory studies after being determined.
When the value I'loaded / Imea ured > (Iloaded / Iunloaded) equivalence is obtained, it is understood that the drain pump is operating without load and it is stopped. In case the measurements taken reaches at 5V continuously, decision is reached that the pump is blocked(2) and in this case, the user is informed with a warning method.

Claims

1. A control method for drain pumps used in electrical home appliances characterized by ;
ΓÇó determining the characteristic between the currents used by the drain pump while operating loaded and unloaded; ΓÇó Saving the obtained difference value in form of ratio like (I╬╣oaded Iu._ioaded> mt0 the microprocessor (1) along with the program to be used;
ΓÇó Starting to measure the drawn current during the use of the machine as of the take off period such as (5 to lOseconds) of the drain pump;
ΓÇó Saving the highest value which is obtained by comparison of the values obtained within the first five seconds or in a different time period as of the measurement, as loaded operating current (I'|oaded) into the memory
ΓÇó Comparing the loaded operating current (I'╬╣oaded) with each measured value and comparing the obtained ratio ((I'loaded / Imeasured ) with the values saved previously into the microprocessor as a result of the laboratory experiments; ΓÇó Stopping the machine when the I'loaded / Imeasured > (I,oaded / Iunloaded) equivalence is provided assuming that the drain pump is working unloaded.
2. A method according to claim 1 wherein in order to measure the current used by the said drain pump; ΓÇó a circuit comprising of an " op-amp" (4) and "AC-DC converter" (5) is used along with a " manganin based resistance" (3) or a " current transformer" (6) or a " Hall effect transistor" (7) serially connected to the electric line of the drain pump (2); ΓÇó the voltage formed on "manganin based resistance" (3) or "current transformer" (6) or " Hall effect transistor" (7) is raised so that the maximum value is 5 V on the " op-amp" (4);
ΓÇó The raised current 0 - 5 V AC on the Op-amp (4) circuit is converted to direct current (DC) and transmitted to the microprocessor (1);
ΓÇó This analog data is converted to digital data.
3. A method according to claim 2 characterized by that when the voltage supplied to the microprocessor 1) permanently exceeds 5V, it is decided that the drain pump (2) is blocked and the user is informed by any means of warning.
PCT/TR1998/000011 1997-06-20 1998-06-19 Electronic control method for drain pumps used in electrical home appliances WO1998059174A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP98932707A EP0920591B1 (en) 1997-06-20 1998-06-19 Electronic control method for drain pumps used in electrical home appliances
AU82525/98A AU8252598A (en) 1997-06-20 1998-06-19 Electronic control method for drain pumps used in electrical home appliances
AT98932707T ATE242430T1 (en) 1997-06-20 1998-06-19 ELECTRONIC CONTROL FOR DRAINAGE PUMPS IN HOUSEHOLD ELECTRICAL APPLIANCES
DE69815261T DE69815261T2 (en) 1997-06-20 1998-06-19 ELECTRONIC CONTROL FOR DRAINAGE PUMPS IN ELECTRICAL HOUSEHOLD APPLIANCES

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR97/00528A TR199700528A3 (en) 1997-06-20 1997-06-20 Electronic control method for drain pumps used in electrical appliances.
TR97/528 1997-06-20

Publications (1)

Publication Number Publication Date
WO1998059174A1 true WO1998059174A1 (en) 1998-12-30

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Application Number Title Priority Date Filing Date
PCT/TR1998/000011 WO1998059174A1 (en) 1997-06-20 1998-06-19 Electronic control method for drain pumps used in electrical home appliances

Country Status (7)

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EP (1) EP0920591B1 (en)
AT (1) ATE242430T1 (en)
AU (1) AU8252598A (en)
DE (1) DE69815261T2 (en)
ES (1) ES2201510T3 (en)
TR (1) TR199700528A3 (en)
WO (1) WO1998059174A1 (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001005349A3 (en) * 1999-07-15 2002-05-02 Hydroair A Unit Of Itt Ind Inc Spa pressure sensing system capable of entrapment detection
EP1638201A2 (en) * 2003-10-07 2006-03-22 Askoll Holding S.r.l. Method for controlling and driving a pump for household appliances
WO2008096103A1 (en) * 2007-02-07 2008-08-14 Dlp Limited Shower apparatus for preventing flooding of a shower floor area
US8793828B2 (en) 2010-04-13 2014-08-05 Whirlpool Corporation Laundry treating appliance with automatic pump shutoff
US9609997B2 (en) 2013-07-09 2017-04-04 Haier Us Appliance Solutions, Inc. Systems and methods for detecting appliance pump cavitation or dry state
US20170213451A1 (en) 2016-01-22 2017-07-27 Hayward Industries, Inc. Systems and Methods for Providing Network Connectivity and Remote Monitoring, Optimization, and Control of Pool/Spa Equipment
US10030647B2 (en) 2010-02-25 2018-07-24 Hayward Industries, Inc. Universal mount for a variable speed pump drive user interface
CN109267290A (en) * 2018-10-30 2019-01-25 青岛海尔洗衣机有限公司 A kind of control method for washing machine and washing machine
US10718337B2 (en) 2016-09-22 2020-07-21 Hayward Industries, Inc. Self-priming dedicated water feature pump
US20200319621A1 (en) 2016-01-22 2020-10-08 Hayward Industries, Inc. Systems and Methods for Providing Network Connectivity and Remote Monitoring, Optimization, and Control of Pool/Spa Equipment
US10976713B2 (en) 2013-03-15 2021-04-13 Hayward Industries, Inc. Modular pool/spa control system

Families Citing this family (1)

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US9840803B2 (en) 2015-10-20 2017-12-12 Haier Us Appliance Solutions, Inc. Pump assembly for appliance

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DE3440977A1 (en) * 1984-11-09 1986-05-22 Loewe Pumpenfabrik GmbH, 2120 Lüneburg System for automatically switching liquid pumps on and off

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Title
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Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001005349A3 (en) * 1999-07-15 2002-05-02 Hydroair A Unit Of Itt Ind Inc Spa pressure sensing system capable of entrapment detection
US6390781B1 (en) 1999-07-15 2002-05-21 Itt Manufacturing Enterprises, Inc. Spa pressure sensing system capable of entrapment detection
EP1638201A2 (en) * 2003-10-07 2006-03-22 Askoll Holding S.r.l. Method for controlling and driving a pump for household appliances
EP1638201A3 (en) * 2003-10-07 2006-05-31 Askoll Holding S.r.l. Method for controlling and driving a pump for household appliances
EP1524760B1 (en) * 2003-10-07 2011-12-07 Askoll Holding S.r.l. Electronic device for controlling a discharge pump driven by a synchronous electric motor with a permanent-magnet rotor
WO2008096103A1 (en) * 2007-02-07 2008-08-14 Dlp Limited Shower apparatus for preventing flooding of a shower floor area
US10030647B2 (en) 2010-02-25 2018-07-24 Hayward Industries, Inc. Universal mount for a variable speed pump drive user interface
US11572877B2 (en) 2010-02-25 2023-02-07 Hayward Industries, Inc. Universal mount for a variable speed pump drive user interface
US8793828B2 (en) 2010-04-13 2014-08-05 Whirlpool Corporation Laundry treating appliance with automatic pump shutoff
US11822300B2 (en) 2013-03-15 2023-11-21 Hayward Industries, Inc. Modular pool/spa control system
US10976713B2 (en) 2013-03-15 2021-04-13 Hayward Industries, Inc. Modular pool/spa control system
US9609997B2 (en) 2013-07-09 2017-04-04 Haier Us Appliance Solutions, Inc. Systems and methods for detecting appliance pump cavitation or dry state
US10272014B2 (en) 2016-01-22 2019-04-30 Hayward Industries, Inc. Systems and methods for providing network connectivity and remote monitoring, optimization, and control of pool/spa equipment
US10363197B2 (en) 2016-01-22 2019-07-30 Hayward Industries, Inc. Systems and methods for providing network connectivity and remote monitoring, optimization, and control of pool/spa equipment
US20200319621A1 (en) 2016-01-22 2020-10-08 Hayward Industries, Inc. Systems and Methods for Providing Network Connectivity and Remote Monitoring, Optimization, and Control of Pool/Spa Equipment
US10219975B2 (en) 2016-01-22 2019-03-05 Hayward Industries, Inc. Systems and methods for providing network connectivity and remote monitoring, optimization, and control of pool/spa equipment
US11000449B2 (en) 2016-01-22 2021-05-11 Hayward Industries, Inc. Systems and methods for providing network connectivity and remote monitoring, optimization, and control of pool/spa equipment
US11096862B2 (en) 2016-01-22 2021-08-24 Hayward Industries, Inc. Systems and methods for providing network connectivity and remote monitoring, optimization, and control of pool/spa equipment
US11122669B2 (en) 2016-01-22 2021-09-14 Hayward Industries, Inc. Systems and methods for providing network connectivity and remote monitoring, optimization, and control of pool/spa equipment
US11129256B2 (en) 2016-01-22 2021-09-21 Hayward Industries, Inc. Systems and methods for providing network connectivity and remote monitoring, optimization, and control of pool/spa equipment
US11720085B2 (en) 2016-01-22 2023-08-08 Hayward Industries, Inc. Systems and methods for providing network connectivity and remote monitoring, optimization, and control of pool/spa equipment
US20170213451A1 (en) 2016-01-22 2017-07-27 Hayward Industries, Inc. Systems and Methods for Providing Network Connectivity and Remote Monitoring, Optimization, and Control of Pool/Spa Equipment
US10718337B2 (en) 2016-09-22 2020-07-21 Hayward Industries, Inc. Self-priming dedicated water feature pump
CN109267290A (en) * 2018-10-30 2019-01-25 青岛海尔洗衣机有限公司 A kind of control method for washing machine and washing machine
CN109267290B (en) * 2018-10-30 2023-06-23 青岛海尔洗衣机有限公司 Washing machine control method and washing machine

Also Published As

Publication number Publication date
DE69815261D1 (en) 2003-07-10
DE69815261T2 (en) 2004-05-06
TR199700528A2 (en) 1999-10-21
AU8252598A (en) 1999-01-04
TR199700528A3 (en) 1999-10-21
EP0920591A1 (en) 1999-06-09
ES2201510T3 (en) 2004-03-16
EP0920591B1 (en) 2003-06-04
ATE242430T1 (en) 2003-06-15

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