EP3387178B1 - Verfahren zum betreiben eines haushaltsgeräts und haushaltsgerät - Google Patents

Verfahren zum betreiben eines haushaltsgeräts und haushaltsgerät Download PDF

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Publication number
EP3387178B1
EP3387178B1 EP16782062.0A EP16782062A EP3387178B1 EP 3387178 B1 EP3387178 B1 EP 3387178B1 EP 16782062 A EP16782062 A EP 16782062A EP 3387178 B1 EP3387178 B1 EP 3387178B1
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EP
European Patent Office
Prior art keywords
pump
operated
during
household appliance
drain line
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.)
Active
Application number
EP16782062.0A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3387178A1 (de
Inventor
Antonio BARRADO FRANCO
Andreas Bischof
Hans Eglmeier
Hartmut Schaub
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.)
BSH Hausgeraete GmbH
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BSH Hausgeraete GmbH
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Publication date
Application filed by BSH Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Priority to PL16782062T priority Critical patent/PL3387178T3/pl
Publication of EP3387178A1 publication Critical patent/EP3387178A1/de
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Publication of EP3387178B1 publication Critical patent/EP3387178B1/de
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    • 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
    • D06F39/086—Arrangements for avoiding detergent wastage in the discharge conduit
    • 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
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/42—Safety arrangements, e.g. for stopping rotation of the receptacle upon opening of the casing door
    • 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

Definitions

  • the invention relates to a method for operating a household appliance for the care of laundry, in which, in particular during a washing phase of an operating program, liquid, in particular water, is introduced into a tub of the household appliance and during a subsequent pumping the liquid and / or a wash liquor from the Lye container is pumped through a drain line, wherein for pumping the liquid and / or the wash liquor, a pump is operated in a main direction and in the pumping down a check valve is moved by a pump suction from a closed position to an open position. While in the closed position, the drain line is sealed against the tub, the drain line is fluidly coupled in the open position of the check valve with the tub.
  • the invention also relates to a domestic appliance for the care of laundry items, which is designed for carrying out such a method.
  • Such household appliances usually include a tub in which a laundry drum is rotatably mounted, in which the laundry items can be introduced via a drum opening.
  • a large number of different washing programs are available. All washing programs has in common that initially a washing phase of the respective program is initiated, in which water is introduced into the tub and this detergent is flushed during a program section. From the water and the detergent, a wash liquor is formed with which the laundry items are cleaned. To clean the laundry, the laundry drum is rotated back and forth.
  • Such a washing phase is then followed by a pumping phase in which the water and / or the wash liquor is pumped out of the tub.
  • This pumping phase can already initiated in a rinse or during a spin operation.
  • the pump is then usually operated a little longer and only a certain period of time after reaching the standstill of the laundry drum at the end of the program off.
  • the wash liquor is pumped out of the tub via a drain line, which can be fluidly coupled via a check valve with the tub.
  • the drain line is connected to a bottom of the tub.
  • the check valve may be provided in the form of a flap or a ball, which is pressed by the residual water in the drain line to the closed position, namely due to a forming in the drain line water column and acting in the closing direction buoyancy of the check valve.
  • the check valve should ensure that washing agent soaked in at the beginning of the washing phase remains in the tub and is not flushed directly into the drain line. So it should be prevented altogether a loss of the detergent at the beginning of the washing process, so at a time when the detergent has not yet dissolved in the water and thus could be flushed relatively quickly through the drain line.
  • a nonreturn valve has the advantage over a solenoid valve, for example, that it has a less complicated construction and is also less expensive
  • the use of a non-return valve also has certain disadvantages: mechanical forces act on the bottom of the suds container and consequently also on the non-return valve itself during operation of the washing machine.
  • jerky pressure forces or pressure waves during the first filling of the tub with water and pressure surges by the movement of the laundry items within the laundry drum can cause the check valve is briefly moved from the closed position to the open position and thus to a loss of detergent by the Check valve comes.
  • On the other side can also get contaminated with germs water from the drain line back into the tub and thus on the laundry.
  • An inventive method is used to operate a household appliance for the care of laundry items, in particular a washing machine or a washer-dryer.
  • the household appliance liquid is preferably filled in the form of water in a tub. Such filling of water may occur at different times during the operating program.
  • the liquid and / or a wash liquor is pumped out of the tub via a drain line.
  • a pump For pumping off the wash liquor, a pump is operated in a main direction, and during pumping, a check valve moves from a closed position, in which the drain line is sealed against the tub, moved to an open position, in which the drain line is fluidically coupled to the tub.
  • a force acting on the check valve water column is moved away from the check valve and pumped, whereby the caused by the water column and acting on the check valve closing forces are reduced or eliminated, this effect is hereinafter referred to as pump suction.
  • pump suction the opening of the check valve can be effected by the pump suction.
  • the pump is operated in a direction opposite to the main direction and thereby a pump pressure is built up on the check valve, by means of which the check valve is pressed to the closed position. That the closing force acting on the return valve is advantageously increased by the force generated by the pump pressure.
  • the method can also be applied to the other operating phases of the operating program, for example during a rinsing phase.
  • the drain pump In order to keep the check valve during the operating phase, especially during the washing phase, safe in its closed position, the drain pump is controlled so that it builds towards the tub or to the check valve out towards a pressure that supports the sealing effect of the check valve by the Check valve is pressed firmly into the sealing seat. If, despite the additional pump pressure, the check valve briefly opens under relatively high loads, the increased pump pressure in the drain line ensures that no detergent or wash liquor can escape and the check valve is brought back to its closed position much faster than without the additional pump pressure the case would be. In this way, the overall loss of detergent can be significantly reduced over the prior art, which in turn improves the washing performance.
  • the check valve may have a sealing body, which is formed for example in the form of a movable flap or a ball.
  • the check valve can optionally have a spring which exerts a restoring force to the closed position, or it may be a spring-free valve, which is held only in the closed position due to a formed in the drain line water column.
  • the pump is operated in the opposite direction at least during a predetermined time interval during the operating phase, in particular during the washing phase.
  • This time interval may include at least one flushing process, in which a detergent is flushed into the tub at the beginning of the washing phase.
  • This phase has proven to be relatively critical in terms of detergent loss, because at this time the detergent is not yet dissolved in the water and could escape relatively quickly from the tub at an open check valve.
  • the additional pump pressure at the check valve can thus be prevented during the flushing of the detergent that this enters the drain line.
  • act at the beginning of the washing phase - when the detergent is flushed - relatively high forces on the tub, which are caused by the introduction of water into the tub. These pressure waves could lead to a short-term opening of the check valve.
  • the pump is operated in the opposite direction at least for a period of time which is greater than one minute, in particular greater than three minutes.
  • the pump may be operated in the opposite direction for at least five minutes or six minutes or seven minutes or eight minutes, or nine minutes or ten minutes to securely hold the check valve in its closed position.
  • the dissolution process of the detergent in the water is usually already completed, so that the pump can optionally be switched off again, because then no significant loss of detergent can occur.
  • the pump during another phase of operation such as a rinsing phase or other filling phase of liquid in the opposite direction operate.
  • the pump is operated in the opposite direction at least during a predominant period of the operating phase.
  • this may also be such that the pump is operated in the opposite direction during the entire washing phase, i. until the transition to the Abpumpphase in which the pump is then operated again in the main direction.
  • the loss of detergent is reduced to a minimum.
  • At least one electrical and / or mechanical motor size of a drive motor driving the pump is detected, namely in particular a current power and / or a current torque and / or a current electric motor current and / or a current speed of the drive motor.
  • the current position of the check valve can be determined. So it can be made conclusions about the tightness of the check valve, so possibly the pump power can be increased or reduced. In this way, the pump can be operated as needed and appropriate to the situation.
  • the drive motor is controlled as a function of the current position of the check valve or of the at least one motor size. If, for example, a higher delivery rate and a lower pump pressure or a lower torque are detected at the pump, this is an indication that the check valve is not sufficiently tight or is not in the closed position. The performance of the pump can be increased in this case to improve the sealing effect. In turn, if it is detected that the check valve is sufficiently tight, the power of the pump may be reduced. Thus, electrical energy can be saved. It can also be provided that the at least one motor size of the drive motor is regulated to a predetermined desired value in order to securely hold the check valve in its closed position.
  • the at least one motor size is detected, then it can also be checked whether during operation of the pump in the opposite direction a leakage of the Check valve is detected for a predetermined period of time. If such a prolonged leak is detected, a warning signal can be output by means of an output device of the household appliance. Thus, the user of the household appliance is informed that the check valve is clogged for example by solid state and thus maintenance or repair of the household appliance is required.
  • a brushless DC motor (BLDC) or a synchronous machine may preferably be used.
  • BLDC brushless DC motor
  • Such a drive motor has a relatively low noise, so that the additional noise caused by the pump operation during the washing phase compared to other, during the washing phase occurring noise are negligible.
  • the energy consumption of a BLDC motor is relatively low, so that the pump can also be operated during the entire washing phase if necessary.
  • An inventive household appliance for the care of items of laundry in particular a washing machine or a washer-dryer, comprises a tub and a drain line, which is fluidically coupled via a check valve with the tub.
  • the domestic appliance also includes a pump integrated into the drain line, including a drive motor which can be operated in a main direction and a direction opposite thereto.
  • the household appliance additionally comprises a control device for controlling the drive motor, which is designed to carry out a method according to the invention.
  • FIG. 1 shown household appliance 1 is designed as a washing machine.
  • the household appliance 1 has a device housing 2, in which a tub 3 is arranged.
  • a laundry drum 4 is rotatably mounted about a rotation axis 5.
  • the axis of rotation 5 is a horizontal axis of rotation in the embodiment.
  • An inlet 7 of the tub 3 is fluidly coupled via a detergent box 8 and valves 9 with an external water connection 10 of the household appliance 1. In known manner, a detergent can be entered into the detergent box 8.
  • the tub 3 is fluidly connected to its bottom or a bottom with a drain line 11, which is formed for example as a hose.
  • a pump 12 is integrated, which is driven by an electric drive motor 13.
  • the drive motor 13 is controlled by means of an electronic control device 14.
  • the pump 12 is on the one hand fluidly connected to an external outlet 15 of the household appliance 1;
  • the pump 12 via a check valve 16 with an outlet 17 of the tub 3 can be coupled.
  • the check valve 16 has a movably mounted sealing body, for example a flap or a ball, and basically allows the flow only in the direction of the tub 3 into the drain line 11.
  • the check valve 16 and its sealing body is movable between an open position and a closed position. The check valve 16 is held in the normal state in the closed position due to a standing in the drain line 11 water column.
  • the pump 12 can be operated by the control device 14 in both directions.
  • the pump 12 may initially be operated in a main direction 18, in which by means of the pump 12, a pump suction 19 is generated in the drain line 11, so that the check valve 16 is moved to its open position and the wash liquor is pumped out of the tub 3.
  • the pump 12 can also be operated in an opposite direction 20, so that at the check valve 16, a pump pressure 21 is generated, which presses the check valve 16 toward the closed position.
  • the drive motor 13 is formed, for example, as a brushless DC motor, a so-called BLDC motor.
  • Fig. 2 a temporal diagram is shown which illustrates a time course of an operating program with several operating phases, such as. Phases 22, 23 and 24, and a washing program of the household appliance 1 schematically and in an abstract manner.
  • the time t is plotted on the x-axis.
  • the washing program is started and a washing phase 22 is initiated, which lasts until a time T1.
  • the laundry items 6 are washed.
  • the washing phase 22 begins with a dispensing operation 23, in which the detergent is rinsed from the detergent box 8 into the tub 3. At the same time while water is introduced into the tub 3.
  • the washing phase 22 may optionally also comprise a plurality of washes.
  • the washing phase 22 is followed by a pumping-down phase 24, during which the pump 12 is operated in the main direction 18.
  • the pumping out phase 24 can also be combined with a spin operation and / or with a rinse cycle.
  • the pump suction 19 is generated and the wash liquor is pumped out of the tub 3.
  • the pump 12 is operated in the opposite direction 20 for a predetermined time interval 25 in order to provide the pump pressure 21 at the check valve 16.
  • the time interval 25 thus begins with the Ein Cyprusvorgang 23 and lasts beyond the Ein Cyprusvorgang 23 addition, namely a predetermined time period 26 of at least one minute, in particular at least three minutes, for example, even ten minutes. This ensures that the check valve 16 is securely held in its closed position, while the detergent dissolves in the water after flushing 23. This dissolution process can take about ten minutes, according to experience.
  • the time interval 25 may also take until the time T1, so that during the entire washing phase 22, the pump 12 is operated in the opposite direction 20.
  • the control device 14 may detect at least one engine size of the drive motor 13, in particular the current engine power and / or the current torque and / or the current intensity of a motor current and / or the current engine speed. Depending on this at least one engine size, the control device 14 can then draw conclusions about the current position and thus the tightness of the check valve 16. The further control of the drive motor 13 then takes place in dependence on this information. For example, if it is detected that the check valve 16 is sufficiently dense, the power of the pump 12 can be reduced to save electrical energy. On the other hand, if a higher delivery rate and a lower torque or a lower pressure are detected at the pump 12, the check valve 16 is not sufficiently tight, and the performance of the pump 12 can be increased to improve the sealing effect.
  • a leakage of the check valve 16 over a longer period of time is detected by the control device 14, optionally a warning signal can be output to the user.
  • a warning signal can be output to the user.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Control Of Washing Machine And Dryer (AREA)
EP16782062.0A 2015-12-09 2016-10-17 Verfahren zum betreiben eines haushaltsgeräts und haushaltsgerät Active EP3387178B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL16782062T PL3387178T3 (pl) 2015-12-09 2016-10-17 Sposób użytkowania urządzenia gospodarstwa domowego i urządzenie gospodarstwa domowego

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015224657.4A DE102015224657A1 (de) 2015-12-09 2015-12-09 Verfahren zum Betreiben eines Haushaltsgeräts und Haushaltsgerät
PCT/EP2016/074839 WO2017097475A1 (de) 2015-12-09 2016-10-17 Verfahren zum betreiben eines haushaltsgeräts und haushaltsgerät

Publications (2)

Publication Number Publication Date
EP3387178A1 EP3387178A1 (de) 2018-10-17
EP3387178B1 true EP3387178B1 (de) 2019-10-09

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ID=57138071

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Application Number Title Priority Date Filing Date
EP16782062.0A Active EP3387178B1 (de) 2015-12-09 2016-10-17 Verfahren zum betreiben eines haushaltsgeräts und haushaltsgerät

Country Status (5)

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EP (1) EP3387178B1 (pl)
CN (1) CN108368664B (pl)
DE (1) DE102015224657A1 (pl)
PL (1) PL3387178T3 (pl)
WO (1) WO2017097475A1 (pl)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4394184A1 (en) 2022-12-26 2024-07-03 Copreci, S.Coop. Hydraulic system for a household appliance

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3691797A (en) * 1971-07-06 1972-09-19 Maytag Co Liquid control system for washing machine
DE4316598A1 (de) * 1993-05-18 1994-11-24 Licentia Gmbh Trommelwaschmaschine
JP4218572B2 (ja) * 2004-04-07 2009-02-04 パナソニック株式会社 食器洗い機のモータ駆動装置
DE102009046782A1 (de) * 2008-12-16 2010-06-17 BSH Bosch und Siemens Hausgeräte GmbH Wasserführendes Haushaltsgerät mit einer in zwei Betriebsarten steuerbaren Pumpe
CN102505425B (zh) * 2011-11-02 2016-06-01 海尔集团公司 一种带有止水结构的排水泵及装有该排水泵的洗衣机
DE102014201927A1 (de) * 2014-02-04 2015-08-06 BSH Hausgeräte GmbH Haushaltsgerät mit einem Wasserbehälter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP3387178A1 (de) 2018-10-17
CN108368664A (zh) 2018-08-03
CN108368664B (zh) 2020-08-04
PL3387178T3 (pl) 2020-05-18
DE102015224657A1 (de) 2017-06-14
WO2017097475A1 (de) 2017-06-15

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