WO2016066485A1

WO2016066485A1 - Laundry-care appliance having a detergent-solution pump

Info

Publication number: WO2016066485A1
Application number: PCT/EP2015/074330
Authority: WO
Inventors: Torsten Böttger; Kevin Hahn; Raymond Römer
Original assignee: BSH Hausgeräte GmbH
Priority date: 2014-10-29
Filing date: 2015-10-21
Publication date: 2016-05-06
Also published as: RU2017117602A; RU2675461C2; EP3212835A1; DE102014222050B3; PL3212835T3; CN107110177A; EP3212835B1; RU2017117602A3

Abstract

The present invention relates to a laundry-care appliance (100) with a recirculation system (105), the recirculation system (105) comprising a tub (109) with an inlet opening (111) and an outlet opening (113), comprising a line (115), which connects the inlet opening (111) and outlet opening (113), and comprising a detergent-solution pump (117), intended for pumping detergent solution through the recirculation system (105) and having a suction connector (131), having a pressure chamber (127), which has a recirculation connector (133) and a drainage connector (135), and having an impeller (129). The detergent-solution pump (117) is designed to pump the detergent solution, in a timed, preferred direction of rotation (145) of the impeller (129), through the recirculation connector (133) to the tub (109) and to drain the detergent solution, in a drainage direction of rotation (147) of the impeller (129), through the drainage connector (135), wherein the drainage connector (135) and the recirculation connector (133) adjoin the pressure chamber (127) tangentially.

Description

Laundry care device with a drain pump

The present invention relates to a laundry care device with a drain pump. To be able to carry out an effective laundry care process, nowadays large-volume laundry care appliances have a pumped-circulation system, by means of which the wash liquor can be pumped out of the tub and subsequently fed again to the tub. In order to remove wash liquor from the laundry care appliance after the laundry care process, laundry care appliances today also have an evacuation system. Pumps are required for the pumping system and the pumping system in order to ensure effective pumping or pumping out of the wash liquor.

In DE 32 09 542 C1 a clockwise and counterclockwise driven radial centrifugal pump is described as a circulating pump in a dishwasher.

It is the object underlying the invention to provide a laundry care device which is designed to perform an effective laundry care process. This object is achieved by articles having the features according to the independent claim. 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 apparatus having a pumping system, wherein the pumping system comprises a tub having an inlet opening and a drain opening, a conduit connecting the inlet opening and the drain opening, and a drain pump for pumping wash liquor through the pumping system , with a suction nozzle, with a pressure chamber, which has a pumping neck and a pumping nozzle, and with an impeller, wherein the drain pump is adapted to pump the wash liquor in a preferred direction of rotation of the impeller through the pumped connection to the tub, and the wash liquor in a pumping direction of the Pump impeller through the pumping nozzle, with the pumping and the pumping neck tangentially connect to the pressure chamber.

As a result, the technical advantage is achieved that is pumped out of the Umpumpsystem through the Umpumpstutzen through the line again to the tub by the temporal preferred direction of rotation of the impeller, or pumped out by the Abpumpdrehrichtung the impeller, the wash liquor through the pumping out of the laundry care becomes. Thus, the drain pump combines depending on the selected direction of rotation of the impeller a Umpumpfunktion and a pumping function in a component.

Conventional laundry care apparatuses with a pumping system normally use lye pumps which are controlled in a single phase and at a mains frequency and have no preferential direction of rotation, and therefore do not have a directionally dependent pumping function.

During a pumping operation of a laundry care device of the present invention, the impeller of the drain pump moves, in a preferred direction of rotation, the preferred time direction of rotation to aspirate wash liquor from the pumping system through the suction nozzle. The aspirated wash liquor is discharged with increased pressure to the pressure chamber of the drain pump. The wash liquor is moved in a circular movement in the pressure chamber, and can be pumped out of the pressure chamber by the pumping neck, which adjoins tangentially to the pressure chamber. It is crucial that the Umpumpstutzen joins tangentially to the pressure chamber to ensure that the circular movement of the wash liquor in the pressure chamber continues tangentially in the Umpumpstutzen to pump the wash liquor from the pressure chamber. Due to the precise tangential arrangement of the Umpumpstutzens with respect to the caused by the temporal preferred direction of rotation of the impeller flow direction of the wash liquor in the pressure chamber, an effective pumping out of the wash liquors is achieved by the pumped neck, without that wash liquor is pumped through the pumping neck.

During a Abpumpvorgangs the impeller of the drain pump moves in a Abpumpdrehrichtung, which is opposite to the preferred time direction of rotation. Characterized the sucked wash liquor is moved in the pressure chamber in a rotational movement, which is opposite to the rotational movement of the wash liquor in the pressure chamber in the preferred time direction of rotation of the impeller. By the washing liquor can be pumped out of the pressure chamber in the Abpumpdrehrichtung through the pumping nozzle, which also connects tangentially to the pressure chamber. Due to the precise tangential arrangement of the Abpumpstutzens with regard to the Abpumpdrehrichtung, an effective pumping out of the wash liquors is achieved by the pumping neck, without the wash liquor is pumped through the Umpumpstutzen. Thus, a rotational direction-dependent pumping or pumping function of the drain pump is realized.

For this reason, the use of the drain pump with a pumping and draining function allows a simplification and cost reduction when used in laundry care equipment, since only a motor with a hydraulic arrangement is used. In addition, the lye pump can replace existing lye pumps, without changing mechanical interfaces, as well as other elements of the pumped circulation system, such as an inlet or outlet hose.

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 washer-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 appliance, the pressure chamber has a pumped circulation area with the pumped-over connection and an exhausting area with the pumped-down connection, wherein a partition wall is preferably arranged between the pumping area and the pumping area.

As a result, the technical advantage is achieved that an effective separation of Abpumpwege at the different directions of rotation of the impeller is ensured by the separation of the Umpumpbereichs of the Abpumpbereich. The separation of the pumped circulation area and the pumping off area can preferably be improved by the use of a dividing wall between the pumped circulation area and the pumping off area become. The partition wall establishes a physical separation between the pumped circulation area and the pumpdown area, so that in the case of opposite rotational movements of the wash liquor in the pressure chamber, a blockage of the wash liquor movement in the pressure chamber after the pumped circulation area or after the pumpdown area is achieved. This reduces the possibility that the wash liquor can not be pumped out of the pumped circulation area, but rather through the pumping down connection during a pumping process, or that the wash liquor is not pumped out of the pumping area during a pumping operation, but rather through the pumped connection.

In a further advantageous embodiment of the laundry care appliance, the dividing wall has a web for separating the pumping area and the pumping area.

As a result, the technical advantage is achieved that a particularly effective separation of Abpumpbereich and Umpumpbereich is achieved by the use of the web of the partition.

In a further advantageous embodiment of the laundry care device, the pumping neck or the pumping neck is inclined relative to the vertical axis of the drain pump at a first angle, in particular at an angle of less than 30 °, or the suction nozzle is at a second angle relative to the vertical axis of the drain pump , in particular at an angle of less than 90 °, inclined.

As a result, the technical advantage is achieved that can be effectively removed through the Abpumpstutzen or Umpumpstutzen through the different slopes of Abpumpstutzen, Umpumpstutzen or suction with respect to the vertical axis of the drain pump, the air of the resulting suction of wash through the suction nozzle wash-air mixture. The vertical axis of the drain pump is arranged perpendicular to the horizontal axis of the drain pump and runs centrally between pumping and Umpumpstutzen the drain pump. The horizontal axis of the drain pump runs approximately parallel to the suction nozzle. Due to the advantageous arrangement of Abpumpstutzen, Umpumpstutzen or suction against the vertical axis of the drain pump, a potentially resulting two-phase mixture of wash and air effectively either through the Abpumpstutzen or be pumped through the pumping neck, whereby an effective Abpump-, or recirculation pumping achieved can be ensured.

In a further advantageous embodiment of the laundry care device, the pumping neck has a first diameter, and the pumping neck has a second diameter, wherein the first diameter is greater than the second diameter.

As a result, the technical advantage is achieved that a larger amount of wash liquor can be pumped through the pumping port through the larger diameter of Abpumpstutzens over the Umpumpstutzen at a constant pumping capacity of the drain pump in a certain time interval, as by the pumping neck. As a result, the pumping-off process can be designed to be advantageous in terms of time, so that rapid pumping out of the wash liquor from the pump-around system is made possible. In a further advantageous embodiment of the laundry care appliance, the impeller has a plurality of impeller blades, wherein the impeller blades are curved.

As a result, the technical advantage is achieved that a fine design of the impeller blade geometry is made possible by the curvature of the impeller blades to ensure a particularly advantageous flow movement of the wash liquor in the pressure chamber, in particular to different flow rates of wash liquors depending on the direction of rotation of the impeller either through the Umpumpstutzen or pump through the pumping nozzle. The curved impeller blades may for example be designed such that it conveys the wash liquor in the preferred time direction of rotation of the impeller preferably to the pumping neck of the pressure chamber to allow an effective pumping of the wash liquor in the pumping system. The curved impeller blades may, for example, be designed such that it conveys the wash liquor in the Abpumpdrehrichtung the impeller preferably to the Abpumpstutzen the pressure chamber to ensure an effective pumping out of the wash liquor from the pumping system. In a further advantageous embodiment of the laundry care appliance, the laundry care appliance comprises a power detection element for detecting an electric power value of the drain pump, eg the torque-forming current, and the laundry care device comprises a controller, wherein the control is designed, a flow rate of wash liquor in the line in dependence to determine the detected electric power value of the drain pump, and wherein the controller is adapted to control the rotational speed of the impeller depending on the determined flow rate of wash liquor.

As a result, the technical advantage is achieved that a simple and reliable control of the pumping capacity of the drain pump depending on the flow rate is made possible by the pump performance-dependent determination of the flow rate, without an additional component for detecting the flow velocity must be introduced into the pumping system of the laundry care device. The power detection element can determine a reduction of the flow velocity on the basis of a falling detected electrical power value of the drain pump, whereby the control can control the speed of the impeller of the drain pump accordingly.

In a further advantageous embodiment of the laundry care device, the power detection element comprises a current sensor for detecting a supply current of the drain pump.

Thereby, the technical advantage is achieved that can be effectively controlled by the use of the current sensor, the suds pump, without having to install another sensor element in the laundry care device. The current sensor comprises a switching resistor which detects the supply current of the drain pump during a time interval. The supply current of the drain pump is dependent on the amount of wash liquor pumped through the drain pump. If the amount of fluid delivered by the pump decreases, the supply current of the pump will be reduced.

In a further advantageous embodiment of the laundry care appliance, the laundry care appliance comprises a flow sensor for detecting a A flow rate of wash liquor in the pumping system and a controller, wherein the controller is configured to compare the flow rate detected by the flow rate sensor with the flow rate determined by the detected electric power value of the tub pump to obtain a comparison value, and wherein the controller is configured To control the speed of the impeller in dependence on the comparative value obtained.

As a result, the technical advantage is achieved that a precise determination of the flow rate of the wash liquor in the pump-around system can be carried out by comparing the flow rate determined by the flow sensor with the flow velocity detected on the basis of the electrical power value of the drain pump. As a result, an effective flow rate-dependent control of the rotational speed of the impeller of the drain pump can be realized. In a further advantageous embodiment of the laundry care appliance, the laundry care appliance has a storage container for storing washing liquor, wherein the pumping out nozzle is connected to a storage container via a pumping line.

As a result, the technical advantage is achieved that is not removed from the laundry care device and discarded by the use of the reservoir, which is connected to the pumping nozzle via the pumping line, pumped out during the Abpumpvorgangs pumping through the Abpumpstutzen and is stored in the reservoir. The wash liquor stored in the reservoir can be reused during a subsequent wash cycle, and re-supplied from the reservoir to the pumping system. By reusing the stored wash liquor, the water and detergent consumption of the laundry care appliance can be effectively reduced.

In a further advantageous embodiment of the laundry care appliance, the drain pump has a first diaphragm or a first nozzle on the pumping nozzle, or a second diaphragm or a second nozzle on the pumping connection. As a result, the technical advantage is achieved that a pressure reduction of the pumped through the respective nozzle wash liquor is achieved by the use of orifices or nozzles on the pumping nozzle or on the pumping neck. Since there is an additional pressure loss at the diaphragm, the drain pump can preferably be formed by the pressure reduction at the pumping nozzle, or on the pumped neck, pumping liquor from the pressure chamber depending on the direction of rotation of the impeller of the drain pump either through the pumping port or through the pumped neck ,

In a further advantageous embodiment of the laundry care appliance, the first orifice or the first nozzle has a third diameter on the pumping out nozzle, and the second orifice or the second nozzle has a fourth diameter on the pumping up, the third diameter being larger than the fourth diameter ,

As a result, the technical advantage is achieved that the first orifice or the first nozzle on the pumping neck has a larger diameter than the second orifice or the second nozzle on the pumping-up neck. As a result, can be pumped through the Abpumpstutzen a larger amount of wash liquor at an identical pumping capacity of the drain pump in a certain time interval, as by the pumped neck. This allows an effective and fast pumping out of the wash liquor from the pumping system through the pumping nozzle.

In a further advantageous embodiment of the laundry care appliance, the pumped-down connection piece is connected via a pumping line to a pumping-down device of the laundry care device, wherein the pumping-off opening is arranged on an outer side of the laundry-care device at a first height, and wherein the first height is greater than a second height of the tub in the laundry-care device is.

Thereby, the technical advantage is achieved that by the arrangement of Abpumpöffnung on the outside of the laundry care device in the first height, which is above the second height of the tub, that is above the highest point of the pumping system, the pressure that are expended by the drain pump in order to pump the wash liquor out through the pump-out nozzle and the pump-down opening from the laundry care appliance, the pressure required by the drain pump must be greater must apply to pump off the wash through the pumping neck. Due to the pressure difference between Abpump- and Umpumpvorgang an effective direction of rotation-dependent selection of Abpumpstutzen and Umpumpstutzen can be achieved in terms of a pumping or Umpumpvorgangs to be performed. In a further advantageous embodiment of the laundry care device, the drain pump during a Abpumpvorgangs a Abpumpdruckhöhe and overcome a Umpumpdruckhöhe during Umpumpvorganges, wherein the drain pump is designed to pump at a Umpumpdruckhöhe to be overcome, the wash in a preferred time direction of rotation of the impeller through the Umpumpstutzen, and wherein the drain pump is designed to pump the wash liquor in a Abpumpdrehrichtung of the impeller through the pumping out at a Abpumpdruckhöhe to be overcome.

As a result, the technical advantage is achieved that pumping out of the wash liquor during Abpumpvorgangs, or pumping out the wash liquor during pumping is ensured by the hydraulic design of the drain pump. Since the pressure level to be overcome by the drain pump differs between the pumping and pumping process, the drain pump is specifically designed in response to a different pumping pressure level, either to move the impeller in a pumping down direction to perform a pump down operation or in a temporal To move preferential direction of rotation to perform a recirculation process.

In a further advantageous embodiment of the laundry care appliance, the laundry care appliance comprises a washing drum for receiving laundry and a load detection device for detecting a weight of laundry in the washing drum, wherein the drain pump is formed, the speed of the impeller depending on the detected weight of the laundry in the washing drum to control. As a result, the technical advantage is achieved that the weight of the laundry can be determined by the load detection means, such as a device for determining the weight of the laundry in the washing drum. Depending on the specific weight of the laundry, the speed of the impeller at a large amount of laundry through the drain pump can be increased to achieve an effective pumping over of the wash liquor and an effective wetting of the laundry, whereby an effective heating of the wash liquor can be ensured in the pumping system.

In a further advantageous embodiment of the laundry care appliance, the drain pump has a heating element, which is designed to heat the wash liquor in the drain pump.

Thereby, the technical advantage is achieved that a particularly effective transfer of heat from the heating element to the wash liquor is achieved by heating the wash liquor in the drain pump through the heating element by the high flow rate of wash liquor in the drain pump.

Embodiments of the invention are illustrated in the drawings and will be described in more detail below.

Show it:

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

Figure 2 is a schematic view of a pumping system with a tub and with a control.

Fig. 3 is a side view of a drain pump; and

Fig. 4 is a side view of a drain pump.

Fig. 1 shows a schematic view of a general laundry care device 100, such as a washing machine. The laundry care appliance 100 comprises a storage container 101, which is also referred to as an induction bowl, and 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. 2 shows a view of a pumping system 105 in a laundry care appliance 100 with a washing drum 107 for receiving laundry, with a washing tub 109 for receiving washing liquor, which comprises an inlet opening 11 and an outlet opening 13. The inlet opening 1 1 1 is connected to the discharge port 1 13 through a line 1 15. The line 1 15 includes a drain pump 1 17, which can pump the wash liquor during a pumping operation either through the drain opening 1 13 from the tub 109 and through the inlet port 1 1 1 again in the tub 109, or during a pumping down the wash through the pumping line 1 19 can pump out of the pumping 105. During Umumpumpvorgangs a large part of the wash liquor in the pumping 105 is circulated through the line 1 15, so that only a part of the present in the pumping 105 wash liquor is present in the tub 109. During the pumping process, the wash liquor in the tub 109 to a pumped level 121.

Before Abpumpvorgang the wash liquor is no longer pumped through the line 1 15, but is collected in the tub 109 to stand for pumping available, the wash liquor in the tub 109 has a Abpumpfüllstand 123. Since the entire wash liquor is in the tub 109 prior to the pump-down process, the pumpdown level 123 is greater than the pumped-circulation level 121.

In Fig. 3, the schematic representation of a drain pump is shown in a side view. The drain pump 1 17 comprises a suction chamber 125 can be sucked into the wash liquor from the line 1 15 and a pressure chamber 127 from which the sucked wash liquor can be discharged at an elevated pressure to the pumping 105 again. In the drain pump 1 17, an impeller 129 is arranged, which may be formed for example as a propeller and may have one or more impeller blades, and the wash liquor from the suction chamber 125 with an increased pressure in the pressure chamber 127 can convey. In Fig. 3, the impeller 129 can not be displayed, since it is located inside the drain pump 1 17. The drain pump 1 17 further comprises a suction nozzle 131 which is arranged on the suction chamber 125 and which is connected to the line 1 15 of the pumping system 105 to suck in wash liquor. The pressure chamber 127 includes a pumping neck 133 through which the lye pump 1 17, the wash liquor can pass under increased pressure to the line 1 15 of the pumping 105 and the tub 109. The pressure chamber 127 further comprises a pumping-out nozzle 135 which can be connected to a pumping line 1 19 of the laundry-care appliance 100 in order to pump the wash-liquor out of the pump-around system 105 and out of the laundry-care appliance 100.

In Fig. 4, the schematic representation of a drain pump is shown in a side view. The viewing direction in Fig. 4 is directed to the pressure chamber 127, wherein the cover of the pressure chamber 127 is removed to represent the interior of the pressure chamber 127. In the drain pump 1 17, an impeller 129 is arranged, which is not visible in the selected representation, and which is formed, wash liquor from the suction chamber 125, which is located in the plane behind the pressure chamber 127 and is not shown in Fig. 4 to convey to the pressure chamber 127 at an increased pressure. The drain pump 1 17 is designed to move the impeller 129 in a preferred time direction of rotation 145 or in a pumping direction 147. The temporal preferred direction of rotation 145 may, for example, be counterclockwise. The Abpumpdrehrichtung 147 can be done for example in a clockwise direction.

A suction port 131 is disposed on the suction chamber 125 to suck washing liquor from the circulating pump 105. The suction nozzle is inclined by about 5 ° relative to the horizontal axis 151 of the drain pump 1 17. The pressure chamber 127 includes a pumping neck 133 through which the lye pump 1 17, the wash liquor can pass under increased pressure to the line 1 15 of the pumping 105 and the tub 109. The pressure chamber 127 further comprises a pumping-out nozzle 135 which can be connected to a pumping line 1 19 of the laundry-care appliance 100 in order to pump the wash-liquor out of the pump-around system 105 and out of the laundry-care appliance 100. The pumping neck 135 and Umpumpstutzen 133 is inclined by about 30 ° relative to the vertical axis 149 of the drain pump 1 17.

The pressure chamber 127 further comprises a partition wall 137 with a web 139, which is arranged in the pressure chamber 127 so as to a Umpumpbereich 141 of Pressure chamber 127 to be separated from a Abpumpbereich 143 of the pressure chamber 127. The pumping portion 141 of the pressure chamber 127 is in contact with the pumping-up port 133, while the impeller 129 moves in the preferred time direction of rotation 145, to convey washing liquor from the suction chamber 125 into the pressure chamber 127. The sucked washing liquor is moved in a circular movement in the preferred time direction of rotation 145 in the pressure chamber 127, then transported into the pumping 141 and can be pumped out of the pressure chamber 127 by the Umpumpstutzen 133, which adjoins the pressure chamber 127 tangentially. In this case, the partition wall 137 with the web 139 effective separation between the Umpumpbereich 141 and the Abpumpbereich 143 to prevent the sucked wash liquor in the preferred timing direction of rotation 145 of the impeller 129 are also partially pumped through the Abpumpbereich 143 and the Abpumpstutzen 135 can.

Since during operation of the laundry care device 100, the lye pump 1 17 pumps mainly the wash in the pumping 105 and only after the end of the laundry care program, the wash pump out of the pumping 105, the drain pump 1 17 is formed such that the preferred time direction of rotation 145 relative to the Abpumpdrehrichtung 147 is preferred. When the impeller 129 moves in the pumping rotational direction 147, wash liquor is also conveyed from the suction chamber 125 into the pressure chamber 127. Due to the different Abpumpdrehrichtungen 147 of the impeller 129, however, the sucked wash liquor is moved in a circular movement in the Abpumpdrehrichtung 147 in the pressure chamber 127, wherein the Abpumpdrehrichtung 147 of the preferred time direction of rotation 145 is opposite. The wash liquor is thereby conveyed into the pump-down region 143 and can be pumped out of the circular pressure chamber 127 through the pump-down neck 135, which adjoins the pressure chamber 127 tangentially. Here, the partition wall 137 with the web 139 effective separation between the Umpumpbereich 141 and Abpumpbereich 143 to prevent the sucked wash liquor can be pumped in a Abpumpdrehrichtung 147 of the impeller 129 in part via the Umpumpbereich 141 and the Umpumpstutzen 133 , The function of the drain pump 1 17 is based on different levels of the wash liquor in the pumping 105 with respect to a pumping operation, or a pumping. Since the wash liquor is no longer bound to the laundry in the washing drum 107 before the pumping process, but is in the tub 109, or in the pumping 105, the level in the pumping system 105 before the pumping is higher, for example 80 cm, than during the Umpumpvorgangs, during which a large part of the wash liquor is bound to the laundry. Due to the different levels of the wash liquor in the pumping system 105, a higher pressure is applied to the drain pump 1 17 during a pumping operation, as during a pumping operation. The pressure difference between Abpump- and Umpumpvorgang can be compensated in the design of the drain pump 1 17 and the line 1 15 of the hydraulic currents through the optimized design of cross sections and nozzles of the drain pump 1 17, without the function of temporal and hydraulic separation of the two pumping operations disturb. The fine dimensioning for the different flow rates during the pumpdown or pumping operation can be achieved by an optimized use of curved impeller vanes of the impeller 129 having an advantageous geometry, or by the use of pressure reducing elements such as orifices and nozzles on the pumping neck 133 or on the Abpumpstutzen 135, or realized by a targeted speed variation of the impeller 129 as a function of the flow conditions or the flow rates of the wash liquor in the pumping 105. For example, the height of the positioning of the drain opening of the laundry care device 100 can be used in order to realize a pressure difference between the pumping process and the pumping process.

Prerequisite for the realization is the use of a direction of rotation-dependent pump motor to move the impeller 129 of the drain pump 1 17 in a preferred time direction of rotation 145 or in a pumping direction 147. Thus, an effective separation of Abpumpvorgangs and Umpumpvorgangs depending on different directions of rotation 145, 147 of the impeller 129 of the pump is achieved by the inventive drain pump. It only has a common motor for a pumping and pumping system 105 of the laundry care device 100 are used, thereby eliminating costs, eg by dispensing with a further cable set. Due to the Umpumpvorgangs can also be dispensed with a sump closure of the tub 109, as a Waschmittelverschleppung is bypassed by this function. A remoistening, or a faulty separation of the flow paths through a blockage, can be detected and thus prevented by a motor current monitoring based on the electrical power of the applied to the drain pump 1 17 electrical power. Thus, through the use of the drain pump 1 17, the entire pumping system 105 can be simplified, whereby a space-saving Umpumplösung is achieved. The drain pump 1 17 can also be used in laundry care apparatuses 100 with conventional pumping systems 105 without having to change mechanical interfaces, or the conventionally used inlet hose of the pumping system 105 or the pumping hose of the pumping system can be used. Through the use of the pumping neck 133 and the Abpumpstutzens 135 Umpump, or pumping, without a specific control of the drain pump 1 17 can be realized. All of the 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 specification or shown in the figures. LIST OF REFERENCE NUMBERS

100 laundry care device

101 storage tank

103 door

105 pumping system

107 washing drum

109 tubs

1 1 1 inlet opening

1 13 drain opening

1 15 line

1 17 drain pump

1 19 pumping line

121 pumped level

123 exhaust level

125 suction chamber

127 pressure chamber

129 impeller

131 suction nozzle

133 Umpumpstutzen

135 pumping nozzles

137 Partition

139 footbridge

141 pumping area

143 pumping area

145 Preferred time direction

147 Secondary direction of rotation

149 Vertical axis

151 Horizontal axis

Claims

1 . A laundry care apparatus (100) having a pumping system (105), wherein the pumping system (105) comprises a tub (109) having an inlet opening (11) and a discharge opening (13), a conduit (15) communicating with the inlet opening (1 1 1) and the drain opening (1 13) connects, and a drain pump (1 17) for pumping wash liquor through the pumping system (105), with a suction nozzle (131), with a pressure chamber (127) which a Umpumpstutzen (133) and an exhaust pump (135), and with an impeller (129), characterized in that

the drain pump (1 17) is adapted to pump the wash liquor in a preferred direction of rotation (145) of the impeller (129) through the pumped neck (133) to the tub (109), and the wash liquor in a Abpumpdrehrichtung (147) of the impeller (147) 129) through the pumping neck (135),

wherein the pumping neck (135) and the pumping neck (133) connect tangentially to the pressure chamber (127).

2. laundry care device (100) according to claim 1, characterized in that the pressure chamber (127) has a Umpumpbereich (141) with the pumping neck (133) and an Abpumpbereich (143) with the pumping neck (135), and that between the Umpumpbereich ( 141) and the Abpumpbereich (143) preferably a partition wall (137) is arranged.

3. laundry care device (100) according to claim 2, characterized in that the partition wall (137) has a web (139) for the separation of Abpumpbereich (143) and Umpumpbereich (141).

4. laundry care device (100) according to any one of the preceding claims, characterized in that the pumping neck (135) or the pumping neck (133) relative to the vertical axis (149) of the drain pump (1 17) at a first angle, in particular at an angle of less than 30 ° inclined, or that the suction nozzle (131) relative to the vertical axis (149) of the drain pump (1 17) at a second angle, in particular at an angle of less than 90 °, is inclined.

The laundry care device (100) according to any one of the preceding claims, characterized in that the pumping neck (135) has a first diameter, and that the pumping neck (133) has a second diameter, wherein the first diameter is greater than the second diameter.

A laundry care appliance (100) according to any one of the preceding claims, characterized in that the impeller (129) comprises a plurality of impeller vanes, the impeller vanes being curved.

The laundry care device (100) according to any one of the preceding claims, characterized in that the laundry care device (100) comprises a power detection element for detecting an electric power value of the drain pump (1 17)

the laundry care device (100) comprises a controller, wherein the controller is designed to determine a flow rate of wash liquor in the line (1 15) in dependence on the detected electric power value of the drain pump (1 17), and

the controller is designed to control the speed of the impeller (129) as a function of the determined flow rate of wash liquor.

Laundry care appliance (100) according to claim 7, characterized in that the power detection element comprises a current sensor for detecting a supply current of the drain pump (1 17).

Laundry care device (100) according to any one of the preceding claims, characterized in that the laundry care device (100) has a reservoir for storing wash liquor, wherein the pumping neck (135) via a pumping line (1 19) is connected to a reservoir. Laundry care appliance (100) according to any one of the preceding claims, characterized in that the drain pump (1 17) has a first aperture or a first nozzle on the pumping neck (135), or a second aperture or a second nozzle on the pumping neck (133).

Laundry care appliance (100) according to claim 10, characterized in that the first aperture or the first nozzle on the pumping neck (135) has a third diameter, that the second aperture or the second nozzle on the pumping neck (133) has a fourth diameter, wherein the third diameter is larger than the fourth diameter.

The laundry care appliance (100) according to one of the preceding claims, characterized in that the pumped-down connection (135) is connected via a pumping line (1 19) to a pump-down opening of the laundry care device (100), wherein the pump-down opening is connected to an outside of the laundry care device (100) in one first height, and wherein the first height is greater than a second height of the tub (109) in the laundry care device (100).

Laundry care appliance (100) according to one of the preceding claims, characterized in that the drain pump (1 17) has to overcome a pumping pressure during a Abpumpvorgangs and during Umumpumping a Umpumpdruckhöhe, and that the drain pump (1 17) is formed, wherein the drain pump ( 1 17) is formed, at a Umpumpdruckhöhe to be overcome pump out the wash liquor in a preferred direction of rotation (145) of the impeller (129) through the Umpumpstutzen (133), and wherein the drain pump (1 17) is formed at a Abpumpdruckhöhe to be overcome In a pumping direction (147) of the impeller (129), wash the suds through the pumping out port (135).

Laundry care appliance (100) according to one of the preceding claims, characterized in that the laundry care appliance (100) comprises a washing drum (107) for receiving laundry and a load detection device for detecting a weight of laundry in the washing drum (107), and in that the drain pump ( 1 17) is formed, the speed of the impeller (129) in To control dependence on the detected weight of the laundry in the washing drum (107).

Laundry care appliance (100) according to one of the preceding claims, characterized in that the drain pump (1 17) has a heating element which is adapted to heat the wash liquor in the drain pump (1 17).