EP2416694A1 - Appareil ménager à circulation d'eau, en particulier machine à laver la vaisselle - Google Patents

Appareil ménager à circulation d'eau, en particulier machine à laver la vaisselle

Info

Publication number
EP2416694A1
EP2416694A1 EP10709497A EP10709497A EP2416694A1 EP 2416694 A1 EP2416694 A1 EP 2416694A1 EP 10709497 A EP10709497 A EP 10709497A EP 10709497 A EP10709497 A EP 10709497A EP 2416694 A1 EP2416694 A1 EP 2416694A1
Authority
EP
European Patent Office
Prior art keywords
pump
during
water
mode
operating mode
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
EP10709497A
Other languages
German (de)
English (en)
Other versions
EP2416694B1 (fr
Inventor
Bernd KRÄNZLE
Stephan Lutz
Michael Rosenbauer
Markus Wecker
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
Original Assignee
BSH Bosch und Siemens Hausgeraete 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 BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Priority to PL10709497T priority Critical patent/PL2416694T3/pl
Publication of EP2416694A1 publication Critical patent/EP2416694A1/fr
Application granted granted Critical
Publication of EP2416694B1 publication Critical patent/EP2416694B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4225—Arrangements or adaption of recirculation or discharge 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
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/004—Priming of not self-priming pumps
    • F04D9/006—Priming of not self-priming pumps by venting gas or using gas valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/02—Self-priming pumps

Definitions

  • the invention relates to a water-conducting household appliance, in particular a dishwasher, according to the preamble of claim 1.
  • a dishwasher has a drain pump, which is connected to the suction side with a sump.
  • a pump chamber in which an impeller is running, is in fluid communication with the pump pot in the upper area via a vent opening.
  • the gas collecting above a residual liquid column can escape via the vent opening into the pump pot.
  • the impeller dives deeper into the residual fluid.
  • the drain pump achieved with a low-noise performance in a short period of time their maximum capacity.
  • a disadvantage of some of the already in the sump filtered rinsing fluid is passed through the vent again back into the sump during pump operation, whereby the flow rate of the drain pump is impaired.
  • the object of the invention is to provide a water-conducting domestic appliance, in particular a dishwasher with a pump, which has an improved delivery rate.
  • the solution is based on a water-conducting household appliance, in particular a dishwasher, at least comprising a pump, with which in at least one normal operating mode liquid is conveyed.
  • the pump can be vented by a vent operating mode which can be carried out before the normal operating mode, during which a gas bubble can be conveyed against the conveying direction during the normal operating mode at least partially from a pump chamber of the pump to a liquid pump inlet of the pump.
  • a vent operating mode which can be carried out before the normal operating mode, during which a gas bubble can be conveyed against the conveying direction during the normal operating mode at least partially from a pump chamber of the pump to a liquid pump inlet of the pump.
  • the bleed mode of operation may be to one in the prior art usual vent in the pump chamber can be omitted.
  • the delivery rate of the pump is improved by the vent operating mode according to the invention.
  • the pump may be operated intermittently during the bleed mode of operation and may temporarily have a lower flow rate than during normal operation of the pump.
  • the gas bubble is at least partially displaced in a development during the vent mode by a generated by the pump ring flow in the pump.
  • the gas bubble can be displaced in the direction of the axis of rotation of the impeller, from where it finally reaches the liquid pump inlet.
  • the speed characteristic during the Entlliesungs vulgarsmodus has a larger speed fluctuation width than during the normal operating mode. That is, the speed of the pump fluctuates between a lower and upper speed limiting the speed fluctuation width during the normal operation mode and during the purge operation mode. This speed fluctuation width is greater during the bleed operation mode than during the normal operation mode.
  • the pump can be operated discontinuously during the venting operating mode. Accordingly, there is no continuous flow. In contrast, the pump is operated continuously in the normal operating mode, so that during operation sets a continuous flow.
  • the pump has a lower delivery rate during the vent operating mode than during the normal operating mode of the pump.
  • the liquid pump inlet is connected to a pump pot of a pump designed as a drain pump.
  • the suds pump serves to dispense liquid, e.g. contaminated rinse liquor from the water-conducting household appliance to promote a home-based sanitation system.
  • a pump wheel of the pump performs at least a jerky rotational movement at least temporarily during the venting operating mode.
  • the bleeding mode of operation is effected by a corresponding control of the liquid pump by a control device.
  • the gas bubble remaining after a stop of the pump wheel above a residual liquid column can be at least partially displaced to a liquid pump feed or discharge. This can take place in that the impeller is driven to execute at least one jerky rotational movement. This causes the residual liquid column in the pump chamber to move, which displaces the gas bubble.
  • the residual liquid column can displace the gas bubble in the direction of an axis of rotation of the impeller under a short-term structure of a ring flow.
  • the gas bubble can therefore escape at least partially via an inlet or outlet nozzle of the liquid pump.
  • the inlet or outlet connection can preferably be aligned axially or coaxially aligned with the impeller rotation axis.
  • the impeller is moved by a rotation angle which is smaller than 360 °, in particular smaller than 240 ° or 120 °.
  • the energy consumption is minimal.
  • the time period required for carrying out the jerky rotary movement which is in the order of a fraction of a second, is also minimal.
  • the control device can control the liquid pump with a venting signal.
  • the vent signal may preferably be located directly upstream of the actual start signal, so that after the venting, the actual start of operation of the liquid pump begins, in which the pump is continuously raised to the maximum flow rate.
  • a DC motor can be used, in particular a brushless DC motor with electronic commutation, d. H. a BLDC motor.
  • the DC motor can be multi-phase, about two- or three-phase, executed.
  • the jerky rotational movement of the pump impeller can be particularly easily generated with exactly predetermined rotation angles, only one, or in the case of a three-phase DC motor, only two phases are switched.
  • a sequence of, in particular up to three jerky rotational movements of the pump impeller can be performed.
  • the rotational movements can be repeated in short time intervals, with an interruption time period of the order of about 0.3 s.
  • the implementation of the jerky rotational movement of the pump impeller itself extends over a short period of time on the order of 0.1 s. In such a constellation, therefore, the entire venting process is less than 1.5 s.
  • the liquid pump can be used as a drain pump in a dishwasher.
  • the drain pump is connected with its pump inlet to a sump of the dishwasher, in which the gas bubble can escape after jerky movement of the pump impeller.
  • the pump inlet can preferably be arranged coaxially with the axis of rotation of the pump impeller.
  • the jerky rotational movement of the impeller can be done without building up a fluid pressure with which a pressure-side check valve element is opened.
  • the pressure-side check valve element separates the hydraulic circuit of the dishwasher from the sewage network.
  • FIG. 1 shows a schematic block diagram of a dishwasher
  • FIG. 2 is an enlarged sectional view of the sump of the dishwasher with associated suds pump
  • FIG. 3 and 4 are enlarged views of the sectional view shown in FIG. 2 when the pump impeller is stopped and when a jerky movement of the pump impeller is carried out.
  • a dishwasher with a washing container 1 is shown roughly schematically as an exemplary embodiment of a water-conducting domestic appliance, in which dishes that are not shown can be arranged in dish racks 3, 5.
  • Rinsing containers 1 are arranged by way of example as spraying means two spray arms 7, 9 provided in different spray levels, with which rinse liquid to be rinsed is applied to the items to be cleaned.
  • a pump pot 11 is provided with associated circulating pump 13, which is fluidly connected via fluid lines 14, 15, 16 with the spray arms 7, 9.
  • the sump 11 is also connected to a, connected to the water supply network fresh water supply line 17 and a drain line 18 in connection, in which a drain pump 19 is connected to pump out contaminated rinsing liquid from the washing compartment 1.
  • the drain pump 19 is followed by a check valve 27. Downstream of the check valve 27, a siphon section 29 follows in the sewer line with mutually opposite vertical line sections, so that a liquid column of predetermined height in the reverse direction against the check valve 27 builds up a liquid pressure.
  • a filter system for cleaning the circulating in the hydraulic circuit rinsing liquid is provided.
  • the filter system has a flat, funnel-shaped fine filter 21, which sits on the top of the pump pot 11, and a centrally located in the pump pot 11 hollow cylindrical, cup-shaped large filter 22.
  • a rinse may include partial program steps with or without liquid feed, such as pre-rinsing, cleaning, intermediate rinsing, rinsing and drying.
  • a rinsing liquid change takes place.
  • the no longer required, contaminated rinsing liquid is derived by putting the drain pump 19 from the washing tank 1 into the waste water supply network.
  • fresh water is introduced via the fresh water supply into the pump pot 11.
  • FIG. 2 shows, in an enlarged sectional illustration, the sump 11 with associated sump pump 19.
  • the hollow cylindrical coarse filter 22 indicated in dashed line.
  • the sump 11 is connected via an intake 31 with the drain pump 19 in connection.
  • the intake manifold 31 is formed in a pump cover 33 of the drain pump 19, which limits the front side of a pump chamber 35.
  • the drain pump 19 has an impeller 37, which is rotatably mounted in the pump chamber 35.
  • the pump chamber 35 opens into an outlet-side pressure port 39 on a radially outer side lying behind the plane of the drawing.
  • the check valve 27 designed as a check valve can be seen within the pressure port 39, which prevents backflow through the pressure port 39 into the pump chamber 35 during delivery.
  • the lye pump 19 is driven by way of example with a three-phase brushless DC motor 43 with electronic commutation.
  • the roughly indicated in Figures 2 to 4 DC motor 43 has a rotor permanent magnet 45 which is mounted on a rotor shaft 46 which in turn carries the impeller 37.
  • the rotor stator magnet 45 is surrounded by rotatably arranged stator packs 47 which generate a rotating magnetic field in pump operation with appropriate control by the control device 23, which carries the rotor permanent magnet 45.
  • Fig. 3 the drain pump 19 is shown out of service, so that the impeller 37 is stopped. In this state, a residual liquid column h builds up in the pump chamber 35, above which a gas bubble remains. According to FIG. 3, the gas bubble is trapped in the upper apex region of the pump chamber 35 and in the transition to the discharge nozzle 39. In addition, a impeller blade partially protrudes into the gas bubble.
  • the drain pump 19 is activated during the wash cycle for a liquid change, which takes place after execution of a partial program step, such as the pre-wash, and before the start of the subsequent part program step, such as cleaning.
  • the trapped in the pump chamber 3 gas bubble increases the time until the drain pump 19 runs at maximum capacity. It is therefore displaced in a vent operating mode, the gas bubble from the pump chamber 35.
  • the bleed mode of operation takes place immediately before the actual operation of the Lye pump 19 instead.
  • the drain pump 19 is controlled before the actual operation start signal S 6 with a vent signal S E , which starts the e-vent operating mode.
  • the bleeding mode two phases of the three-phase DC motor 43 are energized, whereby the pump 37 rotates jerkily by 270 °.
  • the jerky rotational movement I is illustrated in FIG. 4 with an arrow.
  • the bleeding mode of operation here has, for example, three consecutive jerky rotational movements I of the impeller 37, which are separated from each other only fractions of a second of about 0.3 s.
  • an annular flow running radially around the rotational axis of the pump wheel 37 builds up from the stationary residual liquid column h, as shown in FIG. 4.
  • the gas bubble is displaced in the direction of the axis of rotation of the impeller 37.
  • the 270 ° rotational movement of the pump impeller 37 abruptly aborted again.
  • the gas bubble displaced to the axis of rotation as shown in FIG. 4 is largely hurled formally out of the pump chamber 35 through the intake manifold 31 into the pump pot 11.
  • the DC motor 43 Only after expiration of the bleeding mode of operation, the DC motor 43 is driven with the operation start signal S 6 .
  • the speed of the impeller 37 is not abruptly raised during the subsequent start of operation, but continuously until reaching the maximum flow rate.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Textile Engineering (AREA)
  • Washing And Drying Of Tableware (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)

Abstract

L'invention concerne un appareil ménager à circulation d'eau, en particulier une machine à laver la vaisselle, comprenant au moins une pompe (19) grâce à laquelle un liquide peut être déplacé dans au moins un mode normal de fonctionnement. Selon l'invention, la pompe (19) peut être purgée dans un mode de fonctionnement de purge, pouvant être exécuté avant le mode normal de fonctionnement, dans lequel une bulle de gaz peut être transportée, à l'opposé de la direction de transport dans le mode normal de fonctionnement, au moins partiellement entre une chambre de pompe (35) de la pompe (19) et une entrée d'admission de liquide (31) de la pompe (19).
EP10709497.1A 2009-04-06 2010-03-16 Appareil menager a circulation d'eau, en particulier machine a laver la vaisselle Active EP2416694B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL10709497T PL2416694T3 (pl) 2009-04-06 2010-03-16 Sprzęt gospodarstwa domowego prowadzący wodę, w szczególności zmywarka do naczyń

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009002224A DE102009002224B4 (de) 2009-04-06 2009-04-06 Wasserführendes Haushaltsgerät, insbesondere Geschirrspülmaschine
PCT/EP2010/053374 WO2010115685A1 (fr) 2009-04-06 2010-03-16 Appareil ménager à circulation d'eau, en particulier machine à laver la vaisselle

Publications (2)

Publication Number Publication Date
EP2416694A1 true EP2416694A1 (fr) 2012-02-15
EP2416694B1 EP2416694B1 (fr) 2015-03-04

Family

ID=42289157

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10709497.1A Active EP2416694B1 (fr) 2009-04-06 2010-03-16 Appareil menager a circulation d'eau, en particulier machine a laver la vaisselle

Country Status (5)

Country Link
US (1) US8734136B2 (fr)
EP (1) EP2416694B1 (fr)
DE (1) DE102009002224B4 (fr)
PL (1) PL2416694T3 (fr)
WO (1) WO2010115685A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011087168A1 (de) 2011-11-28 2013-05-29 BSH Bosch und Siemens Hausgeräte GmbH Haushaltsgerät und Steuerungsverfahren für ein Haushaltsgerät
DE102014202570A1 (de) * 2014-02-12 2015-08-13 BSH Hausgeräte GmbH Elektrischer Antriebsmotor, Pumpe und Haushaltsgerät mit einer solchen Pumpe
DE102016201446B3 (de) * 2016-02-01 2017-02-09 BSH Hausgeräte GmbH Wäschepflegegerät mit einer Pumpenansteuerung
CN111513642B (zh) * 2020-04-23 2023-06-27 东莞优乐家智能家电有限公司 一种高温消毒洗碗机及其洗碗方法
JP2023003768A (ja) * 2021-06-24 2023-01-17 株式会社ミクニ オイルポンプ装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4106060C2 (de) * 1991-02-27 1995-11-30 Fresenius Ag Pumpe, insbesondere gekapselte medizinische Pumpe
DE4341215A1 (de) 1993-12-03 1995-06-08 Miele & Cie Kreiselpumpe, insbesondere zur Verwendung als Umwälzpumpe für Geschirrspülmaschinen und Waschmaschinen
DE9406463U1 (de) * 1994-04-19 1994-06-16 Bosch-Siemens Hausgeräte GmbH, 81669 München Entlüftungsvorrichtung für nicht selbstansaugende Entleerungspumpen bei Geschirrspülmaschinen
DE9415480U1 (de) 1994-09-24 1996-02-01 AEG Hausgeräte GmbH, 90429 Nürnberg Entlüftungseinrichtung für flüssigkeitsführende hohle Bauteile
US20060237035A1 (en) * 2005-04-25 2006-10-26 Viking Range Corporation Dishwasher with food particle disposal system
DE102007030065A1 (de) 2007-06-29 2009-01-02 BSH Bosch und Siemens Hausgeräte GmbH Geschirrspülmaschine mit einer Pumpe mit einem bürstenlosen Gleichstrommotor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2010115685A1 *

Also Published As

Publication number Publication date
WO2010115685A1 (fr) 2010-10-14
US20120009074A1 (en) 2012-01-12
US8734136B2 (en) 2014-05-27
EP2416694B1 (fr) 2015-03-04
PL2416694T3 (pl) 2015-08-31
DE102009002224A1 (de) 2010-10-07
DE102009002224B4 (de) 2012-09-06

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