EP3449053A1

EP3449053A1 - Laundry-care appliance comprising a pump controller

Info

Publication number: EP3449053A1
Application number: EP17716914.1A
Authority: EP
Inventors: Torsten Böttger; Kevin Hahn; Jutta Klepzig; Raymond Römer
Original assignee: BSH Hausgeraete GmbH
Current assignee: BSH Hausgeraete GmbH
Priority date: 2016-04-29
Filing date: 2017-04-12
Publication date: 2019-03-06
Anticipated expiration: 2037-04-12
Also published as: CN109154123A; PL3449053T3; EP3449053B1; WO2017186500A1; DE102016207391A1; CN109154123B

Abstract

Laundry-care appliance (100) having a pump (105) for pumping washing liquid, wherein the pump (105) comprises an intake chamber (107) and a circulating pressure chamber (115), wherein the circulating pressure chamber (115) is connected fluidically to the intake chamber (107) by way of a circulating intake connection (129), wherein the pump (105) comprises a drain pressure chamber (111) which has a drain pressure stub (113) for connecting fluidically to a drain pressure line, wherein the drain pressure chamber (111) is connected to the intake chamber (107) by way of a drain intake connection (119), wherein the pump (105) has a first pump motor (135) for pumping the washing liquid out of the drain pressure chamber (111) and a second pump motor (139) for pumping the washing liquid out of the circulating pressure chamber (115), and a pump controller (133) for controlling the first and second pump motor (135, 139). The recirculating intake connection (129) and the drain intake connection (119) are coupled in flow terms in the intake chamber (107). The pump (105) comprises a filter element for filtering contaminations out of the washing liquid, wherein the filter element is arranged in the intake chamber (107). The pump controller (133) is configured to activate one of the two pump motors (135, 139) in an activation time period, in order to pump washing liquid out of the intake chamber (107) through the filter element and through one of the intake connections (119, 129) into one of the pressure chambers (111, 115), and the activated pump motor (135, 139) is configured to suck washing liquid out of the other intake connection (119, 129) during the activation time period, in order to pump contaminants which are deposited on the other intake connection (119, 129) through the filter element and through the one intake connection (119, 129) into the one pressure chamber (111, 115).

Description

Laundry care device with a pump control

The present invention relates to a laundry care device with a pump control. Conventional laundry care devices usually have a pumping system for large amounts of charge, through which washing liquid is pumped out of the tub and subsequently returned to the tub. To remove washing liquid from the laundry care device after the laundry care process, conventional laundry care devices also have an evacuation system. Pumps are required for the pump-around system and the pump-down system in order to ensure effective pumping over of the wash fluid in the laundry-care device, or to ensure effective pumping out of the wash fluid from the laundry-care device. Conventionally used centrifugal pumps have in a suction chamber on filter elements which are adapted to filter out in the washing liquid entrained impurities from the washing liquid, whereby the function of the pump can be ensured.

In DE 100 46 349 A1 a washing machine with a circulation pump and a drain pump is shown, wherein the circulation pump is preceded by a fine sieve on its suction side to filter out lint and small dirt particles from the washing liquid.

In DE 103 39 130 A1 a household appliance with a circulating pump and a drain pump is shown, which can be controlled by a central control unit.

It is the object underlying the invention to provide a laundry care device with a pump, which allows effective pumping of washing liquid in the laundry care device. This object is achieved by articles having the features according to the independent claims. Advantageous embodiments of the invention are the subject of the figures, the description and the dependent claims.

According to a first aspect of the invention, the object is achieved by a laundry care device having a pump for pumping washing liquid, wherein the pump comprises a suction chamber, which has a suction port for fluidly connecting to a suction line, the pump comprising a pumping pressure chamber, which a Umpumpdruckstutzen for fluidtechnischen Compressing with a Umpumpdruckleitung, wherein the Umpumpdruckkammer is fluidly connected to the suction chamber by a Umpumpsaugverbindung, the pump comprises a Abpumpdruckkammer having a Abpumpdruckstutzen for fluidly connecting to a Abpumpdruckleitung, wherein the Abpumpdruckkammer is connected to the suction chamber by a Abpumpsaugverbindung, wherein the pump comprises a first pump motor for pumping the washing liquid from the pumping pressure chamber and a second pump motor for pumping the washing liquid from the pumping pressure chamber, and a pump controller for Controlling the first and second pump motors, wherein the recirculation suction connection and the pump down suction connection are fluidically coupled in the suction chamber, the pump comprising a filter element for filtering impurities from the washing liquid, the filter element being arranged in the suction chamber, the pump control being designed activating one of the two pump motors in an activation period to pump wash liquid from the suction chamber through the filter element and through one of the suction connections to one of the pressure chambers, and wherein the activated pump motor is configured to draw wash liquid from the other suction connection during the activation period the other suction compound deposited impurities through the filter element and by a suction in the pumping a pressure chamber. As a result, the technical advantage is achieved that can be effectively pumped by the other of the two suction connections and thus removed by the fluidically coupled to each other Umpumpsaugverbindung and Abpumpsaugverbindung attached to one of the two suction connections contaminants. Thereby For example, the impurities entrained in the washing liquid, such as eg lint bales and / or foreign bodies, can be pumped out by means of the respective pump motor through the respective suction connection and through the respective pressure chamber.

In conventional laundry care apparatuses having a pumping system and an exhaust pumping system, the pumping pressure chamber and the pumping pressure chamber are each independently fluidly connected to the suction chamber so that the flow paths do not interfere with each other and a cleaning function of the flow paths in a filter element of the suction chamber is not enabled. Mostly a sieve-like filter element is used, which indeed filters out contaminants such as foreign bodies or lint deposits and thus enables pump protection, but often causes frequent maintenance intervals for cleaning the filter element.

The pump according to the invention has a filter element with a flow guide, wherein the flow paths mutually influence one another in time, whereby a mutual cleaning of the flow paths is made possible. In particular, the deposition of lint and the associated complete clogging of the flow paths and the resulting expensive cleaning of the filter element can be avoided. The filtering out of large foreign bodies to protect the pump impellers, or to prevent pump motor blockages must be further ensured. The filter element should in particular be designed in such a way that particularly narrow flow cross-sections of the recirculation suction connection and the recirculation pressure chamber are cleaned in the pumping operation of the pump. For this purpose, the flow cross-sections in the filter element are designed so that the suction of Umpumpsaugverbindung and the Abpumpsaugverbindung are arranged close to each other, and a suction-side obstruction of the Umpumpsaugverbindung can be eliminated by a timed pump down through the Abpumpsaugverbindung.

Another constructive way to use this cleaning function especially for the pumping system of the pump is to position the suction port of Umpumpsaugverbindung in a region of the suction chamber, in particular in the filter element at which a high flow rate when pumping through the Abpumpsaugverbindung occurs. If, for example, perpendicular from the pump down pressure connection through the recirculation suction connection during a Umpumpvorgangs is sucked, then the Umpumpsaugverbindung is cleaned in a subsequent Abpumpvorgang by Abpumpdruckverbindung again of impurities.

As a result, depending on the pumping situation or activated function of the pump, in particular the pumping down process or the pumping process, washing liquid can be conveyed either through the pumping pressure chamber into the pumping down pressure line or through the pumping pressure chamber into the pumping pressure line. However, with such a fluidic connection of the pumping pressure chamber and the pumping pressure chamber to the suction chamber, there is the risk that impurities may accumulate on the fluidic connection between the suction chamber and the pumping pressure chamber, in particular in the filter element, and block the fluidic connection. Due to a quasi-parallel suction-side flow guidance in the pump, contaminants accumulated at this connection can be removed during the pumping-down process by the pump-down pressure chamber into the pump-down pressure line. This novel cleaning concept of the pumped circulation system can be realized for the pumped circulation in that the flow cross sections of the pumpdown suction connection and the pumpdown pressure chamber are generally larger than the flow cross sections of the pumped pumping connection and the pumping pressure chamber. This cleaning effect can avoid service calls and allow washing machines with a pumping system to be similar in quality to washing machines equipped with a pump-down system.

In the pump according to the invention in the activation of the first or second pump motor washing liquid through the suction in the suction chamber, then in the filter element, in which divide the flow paths, then either actively pumped through the Abpumpsaugverbindung in Abpumpdruckkammer or Umpumpsaugverbindung in the Umpumpdruckkammer. By the fluidic coupling of Abpumpsaugverbindung with the Umpumpsaugverbindung is sucked from the suction chamber and associated inactive suction washing liquid. In this case, attached lint and hair are sucked together with the washing liquid at the associated inactive suction connection, whereby the associated, inactive suction connection of accumulated impurities, such as lint and hair, can be exempted. Thus, the pump of the present invention makes it possible to effectively remove the accumulated impurities from the pump, particularly at the suction side of the pumping circuit, whereby clogging of the suction side flow paths or blockage of impeller of the first or second pump motor with impurities can be prevented. This creates the possibility of an almost completely maintenance-free pump with a self-cleaning function. Thus, a lower likelihood of service calls in complete pump blockage is given by massive accumulation of foreign bodies or lint, especially since the user can fix blockages on the filter element itself.

A laundry care appliance is understood to mean a device which is used for laundry care, such as e.g. a washing machine or a tumble dryer. In particular, such a laundry care appliance is understood as a household laundry care appliance. So a laundry care device, which is used in the context of household management, and is treated with the laundry in normal household quantities.

In an advantageous embodiment of the laundry care device, the Umpumpsaugverbindung comprises Umpumpsaugrohr, the Umpumpsaugrohr on a side facing the suction chamber Umpumpsaugrohreingang, and the Abpumpsaugverbindung a Abpumpsaugrohr, the Abpumpsaugrohr on a side facing the suction chamber has a Abpumpsaugrohreingang, the Abpumpsaugrohreingang with the Umpumpsaugrohreingang is fluidly coupled, wherein the pump controller is configured to activate one of the two pump motors in the activation period to pump washing liquid from the suction chamber through the filter element and through one of the suction tube and one of the suction tubes in one of the pressure chambers, and wherein the activated pump motor is formed during the Aktivierungszeitabschnitts aspirate washing liquid from the other intake port entrance to the other intake port entrapped impurities by the Fil terelement and pump through the one suction tube inlet and a suction tube into the one pressure chamber.

As a result, the technical advantage is achieved that the Umpumpsaugrohr a particularly effective fluidic connection between the suction chamber and the Umpumpdruckkammer, and that a particularly effective fluidic connection between the suction chamber and the Abpumpdruckkammer is ensured by the Abpumpsaugrohr. The pump control can be used to ensure that impurities deposited on the exhaust pump inlet or pumped-circulation air inlet can be effectively removed or pumped. The Umpumpsaugrohreingang can either be designed as a transverse bore or flanged angle piece or Umpumpsaugrohr and Abpumpsaugrohr are arranged for example parallel to each other, the Abpumpsaugrohreingang and Umpumpsaugrohreingang are aligned with each other. Thus, the suction-side flow paths are fluidically coupled in the filter element such that a self-cleaning function of the non-activated intake track can be made possible. The dissolved impurities are conveyed either during Abpumpbetrieb by Abpumpdruckkammer from the device or are transported during the Umpumpbetrieb by Umpumpdruckkammer at least again in the washing drum. In an advantageous embodiment of the laundry care device, the Umpumpsaugrohr and the Abpumpsaugrohr are at least partially arranged in parallel, and / or wherein the Umpumpsaugrohreingang and Abpumpsaugrohreingang facing each other, and / or wherein the Umpumpsaugrohreingang is arranged laterally adjacent to the Abpumpsaugrohreingang in the suction chamber, and wherein the Umpumpsaugrohr and the Abpumpsaugrohr include in particular an angle.

Thereby, the technical advantage is achieved that by the at least partially parallel arrangement of the Umpumpsaugrohrs and Abpumpsaugrohrs, that the Umpumpsaugrohreingang and Abpumpsaugrohreingang facing each other, that by the lateral arrangement of Umpumpsaugrohreingangs next to the Abpumpsaugrohreingang, and / or that by the angled Arrangement of the two suction pipes to each other, the two Saugrohreingänge in spatial proximity to each other are arranged in a particularly advantageous fluidic manner within the pump. In this way, it is possible to ensure that impurities accumulated on the correspondingly inactive intake tube inlet can be removed particularly effectively during a pumping-down process or during a pump-over process. In an advantageous embodiment of the laundry care device, the Umpumpsaugrohreingang is fluidly coupled to the Abpumpsaugrohreingang to ensure a cleaning function of Umpumpsaugrohreingangs or Abpumpsaugrohreingangs. Thereby, the technical advantage is achieved that the suction-side connection of the flow paths allows a particularly effective fluidic coupling between the Umpumpsaugrohreingang and Abpumpsaugrohreingang to remove at the one of the two Saugrohreingänge accumulated impurities particularly effective.

In an advantageous embodiment of the laundry care device, the pumping suction on a Abpumpdruckkammer side facing a Abpumpsaugrohrausgang, the Abpumpsaugrohr between Abpumpsaugrohreingang and Abpumpdruckauseingang a Abpumpsaugrohröffnung, wherein the Abpumpsaugrohröffnung is fluidly connected to the Umpumpsaugrohreingang the Umpumpsaugrohr.

As a result, the technical advantage is achieved that a particularly effective fluidic coupling between the Umpumpsaugrohr and the Abpumpsaugrohr can be made by connected to the Umpumpsaugrohreingang the Umpumpsaugrohrs Abpumpsaugrohröffnung the Abpumpsaugrohres. Thus, the Umpumpsaugrohr is fluidly connected to the Abpumpsaugrohr, so that during a Umpumpvorgangs scrubbing liquid is pumped in sections through the Abpumpsaugrohr, and the pumped washing liquid is then pumped through the Abpumpsaugrohröffnung through the Umpumpsaugrohreingang in the Umpumpsaugrohr. Characterized in that the Umpumpsaugrohr between the Abpumpsaugrohreingang and the Abpumpdruckauseingang is connected to the Abpumpsaugrohr, impurities deposited during the pumping of liquid through the Abpumpsaugrohr at the Umpumpsaugrohreingang impurities can be removed particularly effectively.

In an advantageous embodiment of the laundry care device, the recirculation suction connection comprises a pumped-circulation chamber opening, which surrounds the suction chamber and fluidly connecting the pumped-around pressure chamber, the pumped-down suction connection comprising a pump down suction tube having a pumped suction tube inlet and a pumped suction tube exit, wherein a number of Abpumpsaugrohroffnungen are arranged between the Abpumpsaugrohreingang and the Abpumpsaugrohraususausgang, wherein the Abpumpsaugrohroffnungen with the Umpumpdruckkammeröffnung are fluidly coupled.

As a result, the technical advantage is achieved that at the Abpumpsaugrohroffnungen, in particular at the two Abpumpsaugrohroffnungen deposited impurities such. Fluff or hair, can be pumped out particularly effective through the Abpumpsaugrohr during a Abpumpvorgangs. During a pumping operation, washing liquid is supplied from the suction chamber into the common filter element through the exhaust pump inlet, through the exhaust pump, through the Abpumpsaugrohroffnungen and through the Umpumpdruckkammeröffnung the Umpumpdruckkammer. Here, impurities entrained in the washing liquid can accumulate on the Abpumpsaugrohroffnungen and clog the Abpumpsaugrohroffnungen. When pumping washing liquid from the suction chamber into the pumping pressure chamber through the Abpumpsaugrohr the accumulated at the Abpumpsaugrohroffnungen impurities are sucked in and promoted with the pumped washing liquid in the pumping pressure chamber and from the pump.

In an advantageous embodiment of the laundry care apparatus the Abpumpsaugrohroffnungen have a Abpumpsaugoffnungsdurchmess, and the Umpumpdruckkammeröffnung a Umpumpdruckkammeröffnungsdurchmesser, wherein the Abpumpsaugoffnungsdurchmesser is less than the Umpumpdruckkammeröffnungsdurchmesser.

This achieves the technical advantage that impurities are deposited on the pumping suction pipe outlets as a result of the pumping outflow pipe diameter being smaller than that of the pumping-around pressure chamber opening diameter, as a result of which the impurities can be pumped off particularly effectively during a subsequent pumping-down operation. In an advantageous embodiment of the laundry care device, the pump controller is configured to activate the first pump motor in the activation period to pump wash liquid from the suction chamber through the pump down suction into the pump down pressure chamber, the first pump motor being configured to draw wash liquid from the pump over suction connection during the activation period. in order to pump impurities accumulated at the Umpumpsaugverbindung through the Abpumpsaugverbindung in Abpumpdruckkammer and by the Abpumpdruckleitung from the laundry care device.

As a result, the technical advantage is achieved that effectively removed by the activation of the first pump motor by the pump control during the Abpumpvorgangs of washing liquid through the Abpumpsaugverbindung in Abpumpdruckkammer, deposited on the Umpumpsaugverbindung impurities and the Abpumpdruckkammer can be supplied to these then via the pumped-down pressure line from to transport the laundry care device.

In an advantageous embodiment of the laundry care apparatus, the pump controller is configured to activate the second pump motor in the activation period to pump washing liquid from the suction chamber through the recirculation suction connection to the recirculation pressure chamber, the second pump motor being configured to draw washing liquid from the exhaust suction connection during the activation period. in order to pump impurities deposited on the exhaust pumping connection through the recirculation suction connection into the pumping-over pressure chamber. Thereby, the technical advantage is achieved that effectively removed by the activation of the second pump motor by the pump control during the pumping of washing liquid through the Umpumpsaugverbindung in the Umpumpdruckkammer, deposited on the Abpumpsaugverbindung impurities and the Umpumpdruckkammer can be supplied.

In an advantageous embodiment of the laundry care device, the filter element has a Abpumpströmungsweg and a Umpumpströmungsweg, wherein the Abpumpströmungsweg fluidically with the suction nozzle and the Abpumpsaugverbindung is connected, wherein the Umpumpströmungsweg is fluidly connected to the suction nozzle and the Umpumpsaugverbindung, and wherein the respective pump motor is adapted to solve in the respective flow path recorded impurities during the activation period and to pump through the respective suction connection in the respective pressure chamber.

As a result, the technical advantage is achieved that a particularly effective filtering, or retention of impurities from the washing liquid is made possible by the different flow paths in the filter element, which is accommodated in the suction chamber. Thereby, the amount of the impurities, which are conveyed from the suction chamber into the pumping pressure chamber or pumping pressure chamber can be reduced. Non-pumpable or umpumpbare foreign bodies or fluff bales are retained on the filter element, low deposits are filtered out, and rinsed by the self-cleaning effect in the function switching between pumping and pumping and then pumped out of the pump.

In an advantageous embodiment of the laundry care device, the filter element comprises a foreign body trap for removing contaminants from the washing liquid, wherein the foreign body trap comprises a flow-extending plate, which in particular has a front edge in the flow direction, wherein the impurities are attachable to the front edge or the foreign body trap comprises in particular a receiving area for receiving the contaminants. Thereby, the technical advantage is achieved that a foreign body trap, in contrast to other filter elements, such as a sieve, is not clogged by the accumulated impurities, whereby a periodic cleaning of the foreign body trap over the device life of the laundry care device is not necessary because the foreign body trap is designed in that it retains foreign matter over the life of the device, but can not clog it with lint, as can happen with a sieve-like filter. Impurities removed from the washing liquid by the foreign body trap can be pumped out of the pump during a pumping-down process by the pumping-down pressure chamber and by the pumping-down pressure line. By an example Pumping directional plate with a leading edge in the pumping direction allows for effective attachment of contaminants. At the same time, the front edge has a low flow resistance, whereby the liquid flow of the pumped by the pump washing liquid is not significantly affected by the plate, but foreign bodies can be successfully deposited. This filter function can also be achieved by suction pipes, which allow suction from a collecting area for foreign bodies or other contaminants. In this case, a distinction is made between arrangements with a parallel suction pipe guide and suction pipes which are arranged at right angles to one another. Furthermore, the foreign body trap may comprise a receiving area, in which impurities may settle, in particular by a flow calming of the washing liquid, and may thereby be absorbed in the receiving area. Due to the concept, foreign bodies or lint-hair accumulations can be collected over a longer maintenance interval or over the entire life of the device in this receiving area.

In an advantageous embodiment of the laundry care appliance, the first pump motor or the second pump motor comprises an electric motor, in particular a brushless DC motor (BLDC motor), or a permanent-magnet, brushless synchronous motor, which in particular can be operated with variable speed.

As a result, the technical advantage is achieved that by the first pump motor and by the second pump motor an effective pumping of washing liquid from the Umpumpdruckkammer in the Umpumpdruckleitung or an effective pumping out of washing liquid from the pumping pressure chamber is made possible in the pumping pressure line. In addition, this drive concept can be increased by increasing the speed pump power for the pump motors to allow in the case of suction-side blockages on the filter element, a cleaning or rinsing through increased flow rates. According to a second aspect of the invention, the object is achieved by a method for pumping washing liquid in a laundry care apparatus, comprising a pump for pumping washing liquid, the pump comprising a suction chamber having a suction port for fluidly connecting to a suction line, wherein the pump comprises a pumping pressure chamber having a pumping pressure port for fluidly connecting to a pumping pressure line, the pumping pressure chamber being fluidly connected to the suction chamber by a pumping suction connection, the pump comprising a pumping pressure chamber having a pumping pressure port for fluidly connecting to a pumping pressure line; Abpumpdruckkammer is connected to the suction chamber by a Abpumpsaugverbindung, said pump having a first pump motor for pumping the washing liquid from the Abpumpdruckkammer and a second pump motor for pumping the washing liquid from the Umpumpdruckkammer, and a pump controller for controlling the first and second pump motor, wherein the Abpumpsaugverbindung is fluidly coupled to the Umpumpsaugverbindung in the suction chamber, wherein the pump comprises a filter element for filtering impurities from the wash liquor, wherein the Filtereleme nt is disposed in the suction chamber, the method comprising activating one of the two pump motors during an activation period to pump washing liquid from the suction chamber through the filter element and through one of the suction connections into one of the pressure chambers, wherein the activated pump motor is formed during the Activating time portion sucking washing liquid from the other suction connection to pump at the other suction connection deposited impurities through the filter element and by a suction connection in the one pressure chamber comprises.

As a result, the technical advantage is achieved that by the fluidic coupling of Umpumpsaugverbindung and the Abpumpsaugverbindung accumulated during the activation period at one of the suction impurities through the other of the suction in the associated pressure chamber and then pumped out of the laundry care device or can be pumped in the laundry care device, so that the accumulated impurities not on one of the two pump motors, eg on one of the impellers of the pump motors, can attach.

In an advantageous embodiment of the method, the method comprises activating the first pump motor during the activation period, to remove washing liquid from the suction chamber through the filter element and through the Pumping Abpumpsaugverbindung in the Abpumpdruckkammer, wherein the first pump motor is adapted to suck during the activation period washing liquid from the Umpumpsaugverbindung to pump at the Umpumpsaugverbindung deposited impurities through the filter element and the Abpumpsaugverbindung in Abpumpdruckkammer.

Thereby, the technical advantage is achieved that at the Umpumpsaugverbindung accumulated contaminants can be pumped through the Abpumpsaugverbindung effectively in the pumping pressure chamber. In an advantageous embodiment of the method, the method comprises activating the second pump motor during the activation period to pump wash liquid from the suction chamber through the filter element through the recirculation suction connection to the recycle pressure chamber, wherein the second pump motor is configured to aspirate wash liquid from the evacuation suction connection during the activation period to pump impurities deposited at the exhaust pumping connection through the filter element and through the recirculation suction connection into the recompression pressure chamber.

As a result, the technical advantage is achieved that at the Abpumpsaugverbindung accumulated impurities can be pumped by the Umpumpsaugverbindung effectively in the Umpumpdruckkammer.

Further embodiments will be explained with reference to the accompanying drawings. Show it:

Fig. 1 is a schematic view of a laundry care device;

FIG. 2 shows a schematic view of a pump of the laundry care device in a sectional view according to an embodiment; FIG.

3 is a schematic view of a pump of the Wäschepflegeräts in sectional view according to a further embodiment; and 4 shows a sequence of a method for pumping washing liquid in a laundry care appliance.

Fig. 1 shows a schematic view of a general laundry care device 100, such as e.g. a washing machine. The laundry care device 100 comprises an induction bowl 101, into which detergent or other liquid substances can be introduced. The laundry care appliance 100 comprises a door 103 for loading the laundry care appliance 100 with laundry.

Fig. 2 shows a schematic view of a pump of Wäschepflegeräts in a sectional view according to an embodiment. The laundry care device 100 comprises a pump 105 for pumping washing liquid. The pump 105 is fluidly connected to a suction line to draw washing liquid through the suction line. The pump 105 is connected to a pump-down pressure line of the laundry-care device 100 to pump washing liquid out of the laundry-care device 100 through the pump-down pressure line. The pump 105 is connected to a pumping-around pressure line of the laundry-care device 100 to pump washing liquid in the laundry-care device 100, that is, to pump the washing liquid from a tub of the laundry-care device 100 through the pumping-around pressure line, and to supply the pumped washing liquid to the tub again. The suction line, Abpumpdruckleitung and Umpumpdruckleitung are not shown in Fig. 2.

The pump 105 comprises a suction chamber 107, which has a suction nozzle 109, which in turn can be fluidly connected to the suction line. The pump 105 further includes a Abpumpdruckkammer 1 1 1 which has a Abpumpdruckstutzen 1 13, which in turn can be fluidly connected to the Abpumpdruckleitung. The pump 105 further comprises a pumping pressure chamber 1 15, which has a pumped-up pressure port 1 17, which in turn can be fluidly connected to a pumping pressure line Umpumpsystems a. In the suction chamber 107, a filter element for filtering washing liquid is arranged, wherein the filter element is not shown in Fig. 2.

The suction chamber 107 is connected to the Abpumpdruckkammer 1 1 1 by a Abpumpsaugverbindung 1 19, which in particular as a Abpumpsaugrohr 121 is formed. The Abpumpsaugrohr 121 has on one of the Abpumpdruckkammer 1 1 1 side facing a Abpumpsaugrohrausgang 123 and has on a suction chamber 107 side facing a Abpumpsaugrohreingang 125. Between the Abpumpsaugrohreingang 125 and the Abpumpsaugrohrausgang 123 a Abpumpsaugrohröffnung 127 is arranged. In particular, the Abpumpsaugrohröffnung 127 a number of Abpumpsaugrohröffnungen 127, in particular two or more Abpumpsaugrohröffnungen 127 include.

The suction chamber 107 is fluidly connected to the Umpumpdruckkammer 1 15 by a Umpumpsaugverbindung 129, wherein the Umpumpsaugverbindung 129 in particular a Umpumpdruckkammeröffnung 131 includes.

When a pump controller 133 of the laundry machine 100 activates the first pump motor 135 connected to the pumping pressure chamber 11, washing liquid is sucked into the suction chamber 107 through the suction port 109, and the sucked washing liquid is drawn through a filter element not shown in FIG Abpumpsaugrohreingang 125 pumped through the Abpumpsaugrohr 121 and through the Abpumpsaugrohrausgang 123 in a Abpumpflussrichtung 137 in the Abpumpdruckkammer 1 1 1. At the Umpumpsaugverbindung 129, in particular at Umpumpdruckkammeröffnung 131 arranged impurities such as lint or hair are sucked from the Umpumpsaugverbindung 129 during the Abpumpvorgangs to pump the impurities through the Abpumpsaugverbindung 1 19 in the pumping pressure chamber 1 1 1. When the pump controller 133 of the laundry machine 100 activates the second pump motor 139 connected to the pumping pressure chamber 15, washing liquid is sucked into the suction chamber 107 through the suction port 109 and the sucked washing liquid is sucked through the pumping suction joint 129 through a filter element not shown in FIG pumped in a Umpumpflussrichtung 141 in the Umpumpdruckkammer 1 15. In the Abpumpsaugverbindung 1 19, in particular in the Abpumpsaugrohr 121 arranged impurities such as lint or hair are sucked from the Abpumpsaugverbindung 1 19 to pump the impurities through the Umpumpsaugverbindung 129 in the Umpumpdruckkammer 15. In general, when pumping washing liquid through the Abpumpsaugverbindung 1 19 larger flow rates than when pumping of washing liquid through the Umpumpsaugverbindung 129 on. For this reason, the Abpumpsaugverbindung 1 19, in particular the Abpumpsaugrohr 121, a larger inner diameter than the Umpumpsaugverbindung 129, in particular a Umpumpsaugrohrs 143 on. Thus, for pumping through the Abpumpsaugverbindung 1 19 and for pumping through the Umpumpsaugverbindung 129 approximately similar flow rate of washing liquid can be achieved. Thus, in a targeted flow guidance of the washing liquid similar cleaning effects can be achieved.

Due to the lower flow rates when pumping over washing liquid may be 129 lower flow cross sections for the Umpumpsaugverbindung than for the Abpumpsaugverbindung 1 19 result. Therefore, the cleaning of Umpumpsaugverbindung 129 is of greater importance than the cleaning of Abpumpsaugverbindung 1 19, since the risk of clogging at smaller flow cross sections and comparable flow rates is higher.

In the embodiment shown in FIG. 2, the exhaust pump suction port 127 is structurally made smaller for retaining foreign substances and blocking accumulations of lint than the pumping pressure chamber port 131. The product of the number and size of the pump discharge port openings 127, the total flow area, is particularly the same Also, the Abpumpsaugrohreingang 125 of the Abpumpsaugrohrs 121 should be less than or equal to the diameter of Abpumpsaugrohrausgangs 123 to filter out blockages or contaminants in front of the Abpumpdruckkammer 1 1 1 and thus before the rotating pump impeller 131 large or smaller than the Umpumpdruckkammeröffnung. Furthermore, these flow cross-sections should be kept as large as possible in order to generate no additional, larger pressure losses in the filter element. The geometry of the Abpumpsaugrohrs 121, the number and the inner diameter of Abpumpsaugrohroffnungen 127 are particularly advantageously determined experimentally and can then be adapted to the conditions of the pump 105. Depending on the construction of the laundry care device 100, in particular in the geometric Design of the drum hole as well as the cuff gap, arise for the pump different requirements with respect to the risk of contamination, especially the hair and lint loading.

Thus, the pump 105 according to the invention enables effective protection against impeller blockages of the first or second pump motor 135, 139. Here, the flow paths within the pump 105 can be configured by operating the pump 105 in a pump-off function and by operating the pump 105 is achieved in a Umpumpfunktion cleaning of the filter element by rinsing filter contaminants, so that the pump 105 has a self-cleaning effect.

For the user of the laundry care device 100, this results in the following advantages. An almost maintenance-free pump 105 having a self-cleaning function is provided on the filter element so that pump maintenance intervals are less frequent in the case of a clogged filter element in the event of massive lint or foreign body infestation. There is less likelihood of customer service intervention in case of complete pump blockage due to foreign matter or massive lint infestation.

Fig. 3 shows a schematic view of a pump of Wäschepflegeräts in a sectional view according to another embodiment in which suction pipes of the pump 105 are arranged parallel to each other and facing openings of the suction pipes, or facing each other. The laundry care device 100 comprises a pump 105 for pumping washing liquid. The pump 105 comprises a suction chamber 107, which has a suction nozzle 109, which in turn can be fluidly connected to a suction line. The pump 105 further includes a Abpumpdruckkammer 1 1 1 which has a Abpumpdruckstutzen 1 13, which in turn can be fluidly connected to a Abpumpdruckungsleitung to pump washing liquid through the Abpumpdruckleitung from the laundry care device 100. The pump 105 further comprises a pumping pressure chamber 1 15, which has a pumping pressure port 1 17, which in turn can be fluidly connected to a pumping pressure line Umpumpsystems to pump wash liquid in the laundry care device 100. In the suction chamber 107 is arranged a filter element for filtering washing liquid, wherein the filter element in Fig. 3 is not shown.

The suction chamber 107 is connected to the Abpumpdruckkammer 1 1 1 by a Abpumpsaugverbindung 1 19, which is in particular designed as a Abpumpsaugrohr 121. The Abpumpsaugrohr 121 has on one of the Abpumpdruckkammer 1 1 1 side facing a Abpumpsaugrohrausgang 123 and has on a suction chamber 107 side facing a Abpumpsaugrohreingang 125.

The suction chamber 107 is connected to the Umpumpdruckkammer 1 15 by a Umpumpsaugverbindung 129, which in particular a Umpumpsaugrohr 143 includes. The Umpumpsaugrohr 143 has on a Umpumpdruckkammer 1 15 side facing a Umpumpsaugrohrausgang 145 and has on a suction chamber 107 side facing a Umpumpsaugrohreingang 147 on. Here, the Abpumpsaugrohreingang 125 of Abpumpsaugrohres 123 is fluidly coupled to the Umpumpsaugrohreingang 147 of Umpumpsaugrohres 143. The fluidic coupling between the Abpumpsaugrohreingang 125 and Umpumpsaugrohreingang 147 is achieved in that the Umpumpsaugrohr 143 and Abpumpsaugrohr 121 are at least partially arranged in parallel and the Abpumpsaugrohreingang 125 and Umpumpsaugrohreingang 147 are arranged side by side in the suction chamber 107, or the Abpumpsaugrohreingang 125 and the Umpumpsaugrohreingang 147 facing each other. When a pump controller 133 of the laundry care apparatus 100 activates the first pump motor 135 connected to the pumping pressure chamber 11, washing liquid is sucked into the suction chamber 107 through the suction port 109, and the sucked washing liquid is drawn through a filter element not shown in FIG Abpumpsaugrohreingang 125 pumped through the Abpumpsaugrohr 121 and through the Abpumpsaugrohrausgang 123 in a Abpumpflussrichtung 137 in the Abpumpdruckkammer 1 1 1 and then from the laundry care device 100. At the Umpumpsaugverbindung 129, in particular at the Umpumpsaugrohreingang 147 of Umpumpsaugrohrs 143 accumulated impurities such as lint or hair, are sucked by the fluidic coupling between the Umpumpsaugrohreingang 147 and the Abpumpsaugrohreingang 125 from the Umpumpsaugverbindung 129 to pump the impurities through the Abpumpsaugverbindung 1 19 in the Abpumpdruckkammer 1 1 1. When the pump controller 133 of the laundry care apparatus 100 activates the second pump motor 139, which is connected to the recirculation pressure chamber 15, washing liquid is sucked through the suction nozzle 109 into the suction chamber 107 and the sucked washing liquid passes through the recapitulation suction connection 129, in particular through the recirculation suction pipe inlet 147 the Umpumpsaugrohr 143 and pumped through Umpumpsaugrohrausgang 145 in a Umpumpflussrichtung 141 in the Umpumpdruckkammer 15. In the Abpumpsaugverbindung 1 19, in particular in the Abpumpsaugrohreingang 125 of Abpumpsaugrohrs 121 deposited impurities such as lint or hair are sucked from the Abpumpsaugverbindung 1 19 to pump the impurities through the Umpumpsaugverbindung 129 in the Umpumpdruckkammer 1 15 to them again the To supply washing drum.

4 shows a sequence of a method 200 for pumping washing liquid in a laundry care device 100 with a pump 105 which is described in accordance with FIGS. 2 and 3.

The method 200 comprises as a single method step the activation 201 of one of the two pump motors 135, 139 during an activation period in order to pump washing liquid from the suction chamber 107 through one of the suction connections 1 19, 129 into one of the pressure chambers. In this case, the activated pump motor 135, 139 is formed during the activation period washing liquid from the other suction connection 1 19, 129 sucked to the other suction connection 1 19, 129 accumulated impurities through a suction connection 1 19, 129 in a pressure chamber 1 1 1 To pump 1 15. As a result, an effective removal of impurities attached to the suction connection 19, 129 can be achieved.

All features explained and shown in connection with individual embodiments of the invention may be provided in different combinations in the article according to the invention, in order to simultaneously realize their advantageous effects. The scope of the present invention is given by the claims and is not limited by the features illustrated in the description or shown in the figures.

LIST OF REFERENCE NUMBERS

100 laundry care device

101 induction bowl

103 door

105 pump

107 suction chamber

109 suction nozzle

11 1 pumping pressure chamber

113 pumping discharge nozzle

115 pumping pressure chamber

117 Reciprocating pumping

119 Abpumpsaugverbindung

121 Abpumpsaugrohr

123 exhaust pump outlet

125 exhaust pump inlet

127 Abpumpsaugrohröffnung

129 Umpumpsaugverbindung

131 Umpumpdruckkammeroffnung

133 pump control

135 First pump motor

137 Pumping flow direction

139 Second pump motor

141 Umpumpflussrichtung

143 Transfer pump

145 Umpumpsaugrohrausgang

147 Umpumpsaugrohreingang

200 Method for pumping washing liquid in a laundry care appliance

201 Activate one of the two pump motors

Claims

A laundry care appliance (100) having a pump (105) for pumping washing liquid, said pump (105) including a suction chamber (107) having a suction port (109) for fluidly connecting to a suction line, said pump (105) comprising a pumping pressure chamber (1 15), which has a recirculation pressure connection (1 17) for fluidic connection to a recirculation pressure line, wherein the recirculation pressure chamber (1 15) is fluidly connected to the suction chamber (107) by an Umpumpsaugverbindung (129), wherein the pump (105) a Abpumpdruckkammer (1 1 1) comprising a Abpumpdruckstutzen (1 13) for fluidly connecting with a Abpumpdruckleitung, wherein the Abpumpdruckkammer (1 1 1) with the suction chamber (107) through a Abpumpsaugverbindung (1 19) is connected, wherein the Pump (105) has a first pump motor (135) for pumping the washing liquid from the Abpumpdruckkammer (1 1 1) and a second pump motor (139) for pumping the washing liquid from the pumping pressure chamber (15), and a pump controller (133) for controlling the first and second pump motors (135, 139), characterized in that

the Umpumpsaugverbindung (129) and the Abpumpsaugverbindung (1 19) in the suction chamber (107) are fluidly coupled, and that

the pump (105) comprises a filter element for filtering contaminants from the washing liquid, the filter element being arranged in the suction chamber (107), wherein

the pump control (133) is designed to activate one of the two pump motors (135, 139) in an activation period in order to move washing liquid out of the suction chamber (107) through the filter element and through one of the suction connections (1 19, 129) into one of the pressure chambers ( 1 1 1, 1 15) to pump, and wherein

the activated pump motor (135, 139) is designed to suck washing liquid from the other suction connection (1 19, 129) during the activation period in order to be attached to the other suction connection (1 19, 129) Impurities through the filter element and by a suction connection (1 19, 129) in a pressure chamber (1 1 1, 1 15) to pump.

Laundry care appliance (100) according to claim 1, characterized in that the Umpumpsaugverbindung (129) comprises a Umpumpsaugrohr (143), wherein the Umpumpsaugrohr (143) on a suction chamber (107) side facing a Umpumpsaugrohreingang (147), and that the Abpumpsaugverbindung (1 19) comprises a Abpumpsaugrohr (121), wherein the Abpumpsaugrohr (121) on a suction chamber (107) side facing a Abpumpsaugrohreingang (125), wherein the Abpumpsaugrohreingang (125) with the Umpumpsaugrohreingang (147) is fluidly coupled, wherein the pump controller (133) is adapted to activate one of the two pump motors (135, 139) in the activation period to deliver wash liquid from the suction chamber (107) through the filter element and through one of the suction tube inlets (125, 147) and one of the suction tubes (121 , 143) in one of the pressure chambers (1 1 1, 1 15) to pump, and wherein

the activated pump motor (135, 139) is adapted to aspirate scrubbing liquid from the other suction tube inlet (125, 147) during the activation period to cause contamination at the other suction tube inlet (125, 147) through the filter element and through the one suction tube inlet (125, 147) ) and to pump a suction pipe (121, 143) into the one pressure chamber (1 1 1, 1 15).

Laundry care appliance (100) according to claim 2, characterized in that the pumped-circulation suction pipe (143) and the pumped-off suction pipe (121) are arranged at least in sections in parallel, the pumped-suction tube inlet (147) and the pumping-down tube inlet (125) facing one another, or the pumped-circulation inlet ( 147) is arranged laterally next to the pumping suction tube inlet (125) in the suction chamber (107), and wherein the pumping suction tube (143) and the pumping suction tube (121) in particular enclose an angle.

Laundry care appliance (100) according to claim 2 or 3, characterized in that the Umpumpsaugrohreingang (147) with the Abpumpsaugrohreingang (125) is fluidly coupled to a cleaning function of Ensure pumped intake port (147) or exhaust pump intake (125).

5. laundry care device (100) according to one of claims 2 to 4, characterized in that the Abpumpsaugrohr (121) on one of Abpumpdruckkammer (1 1 1) side facing a Abpumpsaugrohrausgang (123), that the Abpumpsaugrohr (121) between the Abpumpsaugrohreingang (125) and the Abpumpsaugrohrausgang (123) has a Abpumpsaugrohroffnung (127), wherein the Abpumpsaugrohroffnung (127) with the Umpumpsaugrohreingang (147) of the Umpumpsaugrohrs (143) is fluidly connected.

6. laundry care device (100) according to claim 1, characterized in that the Umpumpsaugverbindung (129) comprises a Umpumpdruckkammeröffnung (131) which fluidly connects the suction chamber (107) and the Umpumpdruckkammer (1 15), wherein the Abpumpsaugverbindung (1 19) a An evacuation suction tube (121) having an evacuation suction tube inlet (125) and an evacuation suction tube exit (123), wherein a plurality of evacuation inlet tube openings (127) are disposed between the evacuation inlet tube entrance (125) and the evacuation inlet tube exit (123), the evacuation inlet tube openings (127) having the pumping pressure chamber opening (131) are fluidically coupled.

The laundry care apparatus (100) according to claim 6, characterized in that the pumping suction pipe openings (127) have a pumping suction port diameter, and in that the pumping pressure chamber opening (131) has a pumping pressure chamber opening diameter,

wherein the Abpumpsaugöffnung diameter is less than the Umpumpaugöffnungsdurchmesser.

8. laundry care device (100) according to any one of the preceding claims, characterized in that the pump control (133) is adapted to activate the first pump motor (135) in the activation period to wash liquid from the suction chamber (107) through the Abpumpsaugverbindung (1 19 ) Pump in the Abpumpdruckkammer (1 1 1), wherein the first pump motor (135) is adapted to suck during the activation period washing liquid from the Umpumpsaugverbindung (129) to the umpumpsaugverbindung (129) deposited impurities through the Abpumpsaugverbindung (1 19) in the pumping pressure chamber (1 1 1) and by the pumping pressure line from the laundry care device ( 100).

9. The laundry care device (100) according to any one of claims 1 to 7, characterized in that the pump control (133) is adapted to activate the second pump motor (139) in the activation period to wash liquid from the suction chamber (107) through the Umpumpsaugverbindung ( 129) into the Umpumpdruckkammer (1 15), wherein the second pump motor (139) is adapted to suck during the activation period washing liquid from the Abpumpsaugverbindung (1 19) to the Abpumpsaugverbindung (1 19) deposited impurities by Umpumpsaugverbindung (129 ) to pump into the Umpumpdruckkammer (1 15).

10. laundry care device (100) according to any one of the preceding claims, characterized in that the filter element has a Abpumpströmungsweg and a Umpumpströmungsweg, wherein the Abpumpströmungsweg fluidly connected to the suction nozzle (109) and the Abpumpsaugverbindung (1 19), wherein the Umpumpströmungsweg with fluidically the suction port (109) and the Umpumpsaugverbindung (129) is connected, and wherein the respective pump motor (135, 139) is adapted to solve in the respective flow path recorded impurities during the activation period and by the respective suction connection (1 19, 129) to pump the respective pressure chamber (1 1 1, 1 15).

1 1. A laundry care appliance (100) according to any one of the preceding claims, characterized in that the filter element comprises a foreign body trap for removing contaminants from the washing liquid, wherein the foreign body trap comprises a flow-extending plate, which in particular has a front edge in the flow direction, wherein the impurities are attachable to the front edge or wherein the foreign body trap comprises in particular a receiving area for receiving the contaminants. Laundry care appliance (100) according to one of the preceding claims, characterized in that the first pump motor (135) or the second pump motor (139) comprises an electric motor, in particular a brushless DC motor (BLDC motor), or a permanent-magnet, brushless synchronous motor, which in particular variable speed is operable.

A method (200) of pumping wash liquid in a laundry care appliance (100) having a pump (105) for pumping wash liquid, the pump (105) including a suction chamber (107) having a suction port (109) for fluidly connecting to a suction line wherein the pump (105) comprises a pumping pressure chamber (1 15), which has a pumping pressure connection (1 17) for fluidic connection with a pumping pressure line, wherein the pumping pressure chamber (1 15) with the suction chamber (107) by a Umpumpsaugverbindung (129) fluidically connected, wherein the pump (105) comprises a Abpumpdruckkammer (1 1 1) having a Abpumpdruckstutzen (1 13) for fluidly connecting with a Abpumpdruckleitung, wherein the Abpumpdruckkammer (1 1 1) with the suction chamber (107) by a Abpumpsaugverbindung (1 19) is connected, wherein the pump (105) has a first pump motor (135) for pumping the washing liquid from the Abpumpdruckkammer (1 1 1) and a a second pump motor (139) for pumping the washing liquid from the Umpumpdruckkammer (1 15), and a pump controller (133) for controlling the first and second pump motor (135, 139), wherein the Abpumpsaugverbindung (1 19) with the Umpumpsaugverbindung (129 ) is fluidically coupled in the suction chamber (109), wherein the pump (105) comprises a filter element for filtering impurities from the washing liquid, the filter element being arranged in the suction chamber, characterized in that the method (200)

activating (201) one of the two pump motors (135, 139) during an activation period in order to remove washing liquid from the suction chamber (107) through the filter element and through one of the suction connections (1 19, 129) into one of the pressure chambers (1 1 1, 1 15) to pump, wherein the activated pump motor (135, 139) is designed to aspirate washing liquid from the other suction connection (1 19, 129) during the activation period in order to remove contaminants deposited on the other suction connection (1 19, 129) by the filter element and by a suction connection (1 19, 129) into which a pressure chamber (1 1 1, 1 15) to pump comprises.

14. Method (200) according to claim 13, characterized in that the method (200)

activating (201) the first pump motor (135) during the activation period to pump washing liquid from the suction chamber (107) through the filter element and through the Abpumpsaugverbindung (1 19) in the Abpumpdruckkammer (1 1 1)

the first pump motor (135) is adapted to aspirate wash liquid from the recap suction connection (129) during the activation period to impurities attached to the recap suction connection (129) through the filter element and through the exhaust suction connection (1 19) to the expulsion pressure chamber (1 1 1) pumping.

15. Method (200) according to claim 13, characterized in that the method (200)

activating (201) the second pump motor (139) during the activation period to pump wash liquid from the suction chamber (107) through the filter element and through the recirculation suction connection (129) into the recompression pressure chamber (15)

the second pump motor (139) is adapted to aspirate washing liquid from the pumping suction connection (1 19) during the activation period to impurities attached to the pumping suction connection (1 19) through the filter element and through the pumping suction connection (129) into the pumping pressure chamber (15) pumping.