EP3411520B1 - Laundry treatment appliance comprising a pump drive system - Google Patents
Laundry treatment appliance comprising a pump drive system Download PDFInfo
- Publication number
- EP3411520B1 EP3411520B1 EP16822696.7A EP16822696A EP3411520B1 EP 3411520 B1 EP3411520 B1 EP 3411520B1 EP 16822696 A EP16822696 A EP 16822696A EP 3411520 B1 EP3411520 B1 EP 3411520B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- pressure
- washing liquid
- line
- pressure chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000005406 washing Methods 0.000 claims description 160
- 239000007788 liquid Substances 0.000 claims description 149
- 238000005086 pumping Methods 0.000 claims description 60
- 230000004913 activation Effects 0.000 claims description 43
- 238000000034 method Methods 0.000 claims description 17
- 238000001514 detection method Methods 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 230000008901 benefit Effects 0.000 description 16
- 230000006870 function Effects 0.000 description 9
- 239000012530 fluid Substances 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000003213 activating effect Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 239000003599 detergent Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000004851 dishwashing Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0072—Installation or systems with two or more pumps, wherein the flow path through the stages can be changed, e.g. series-parallel
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00
- D06F39/08—Liquid supply or discharge arrangements
- D06F39/083—Liquid discharge or recirculation arrangements
- D06F39/085—Arrangements or adaptations of pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0066—Control, e.g. regulation, of pumps, pumping installations or systems by changing the speed, e.g. of the driving engine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D9/00—Priming; Preventing vapour lock
- F04D9/001—Preventing vapour lock
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/44—Current or voltage
- D06F2103/48—Current or voltage of the motor driving the pump
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F33/00—Control of operations performed in washing machines or washer-dryers
- D06F33/30—Control of washing machines characterised by the purpose or target of the control
- D06F33/47—Responding to irregular working conditions, e.g. malfunctioning of pumps
Definitions
- the present invention relates to a laundry care device with a pump control for a pumping system.
- Conventional laundry care devices with a high loading capacity generally have a pumping system through which washing liquid can be pumped out of the tub and then fed back to the tub.
- conventional laundry care devices In order to remove washing liquid from the laundry care device after the laundry care process, conventional laundry care devices also have a pumping system. Pumps are required for the pumping over system and the pumping out system in order to ensure an effective pumping of the washing liquid in the laundry care device or an effective pumping out of the washing liquid from the laundry care device.
- a pump of a washing machine which is controlled as a function of a water level detected by a pressure switch.
- the object on which the invention is based is to specify a laundry care device with a pump which enables washing liquid to be effectively pumped in the laundry care device.
- the object according to the invention is provided by a laundry care device with a pump for pumping washing liquid, the pump having a suction chamber with a suction nozzle for fluid connection with a suction line, a first Pressure chamber with a first pressure port for fluid connection with a first pressure line, and a second pressure chamber with a second pressure connection for fluid connection with a second pressure line, the pump having a first pump motor for pumping the washing liquid from the first pressure chamber through the first pressure line with a having a first delivery flow and a second pump motor for pumping the washing liquid from the second pressure chamber through the second pressure line with a second delivery flow, and a pump control for controlling the first and second pump motors released, the pump control being designed to control one of the two pump motors in an activation time segment activate in order to pump washing liquid from the associated pressure chamber through the associated pressure line with the associated delivery flow, and the pump control is designed, in the activation time segment, the other of the two Pum Activate pen motors to pump washing liquid from the associated pressure chamber through
- washing liquid is pumped through one of the two pressure lines, the active pressure line, with a delivery flow, and through the other of the two pressure lines, the inactive pressure line, up to a maximum washing liquid level in the inactive pressure line or only a delivery pressure is built up, without a permanent flow rate being established and thus only the water column in the inactive pressure line being raised in order to prevent air being sucked in, which would interrupt or reduce the flow rate in the active pressure line.
- the inactive pressure line there is no delivery flow of washing liquid, but the washing liquid is only raised up to the maximum washing liquid level in the inactive pressure line.
- the maximum washing liquid level that is established is sufficient to prevent air being sucked in backwards through the inactive pressure line, while the pumping or pumping process is carried out at the same time through the active pressure chamber and the active pressure line is carried out.
- the pump according to the invention by activating both pump motors at the same time, it can be ensured that when pumping washing liquor through one of the two pressure lines, through the active pressure line, in particular the pump-off line or pump-around line, a constant flow of washing liquid can be built up in the pump-off line or pump-around line .
- the two pump motors are driven by the pump control at different speeds, so that in the other of the two pressure lines, the inactive pressure line, the washing liquid is only pumped up to the maximum washing liquid level and thus no flow is created in the inactive pressure line.
- the maximum washing liquid level in the inactive pressure line is sufficient to prevent air being sucked in through the inactive pressure line.
- a laundry care device is understood to mean a device that is used for laundry care, such as a washing machine or a tumble dryer.
- a laundry care device is understood to mean a household laundry care device. So a laundry care device, which is used in the context of housekeeping, and with which laundry is treated in household quantities.
- the laundry care device has a tub for receiving washing liquid, the washing liquid in the tub having a container level, the maximum washing liquid level in the associated pressure line having a height which is at least as great as the height of the washing liquid container level is in the tub.
- the height of the maximum washing liquid level in the inactive pressure line which is greater than the height of the container level of the washing liquid in the tub, ensures to a sufficient extent that no air passes through the washing liquid column in the pressure line is sucked in.
- the laundry care device has a tub for receiving washing liquid and a pressure sensor for detecting the pressure exerted by the washing liquid on the tub, the tub being fluidically connected to the suction line, and the pump control being designed, a To control the speed of the pump motors as a function of the detected pressure in order to prevent air being sucked in through the associated pressure line.
- the pump control is designed to reduce the speed of the pump motors when the detected pressure falls below a predetermined pressure threshold value.
- the pump control is designed to activate the first pump motor in the activation time segment in order to pump washing liquid out of the first pressure chamber through the first pressure line with the first delivery flow, and the pump control is designed to close the second pump motor in the activation time segment Activate to pump washing liquid from the second pressure chamber up to a maximum washing liquid level in the second pressure line.
- the first pressure chamber comprises a pump-out pressure chamber
- the first pressure nozzle comprises a pump-out pressure nozzle
- the first pressure line comprises a pump-out line
- the first pump motor being designed to discharge washing liquid in the activation time segment from the pump-out pressure chamber through the pump-out line with a pump-out delivery flow to pump out the laundry care device.
- the pump control is designed to activate the second pump motor in a further activation time segment in order to pump washing liquid out of the second pressure chamber through the second pressure line with the second delivery flow, and that the pump control is designed in the further activation time segment activate the first pump motor to pump washing liquid from the first pressure chamber up to a maximum washing liquid level in the first pressure line.
- the second pressure chamber comprises a pumping pressure chamber
- the second pressure port comprises a pumping pressure port
- the second pressure line comprises a pumping line
- the second pump motor being designed, washing liquid in the further activation period from the pumping pressure chamber through the pumping line with a pumping flow to pump in the laundry care device.
- the laundry care device has a tub, the suction line and the pumping line are each fluidly connected to the tub, the second pump motor being designed to pump washing liquid out of the tub through the suction line, and the pumped washing liquid through the pumping line to pump again into the tub with a pumping flow.
- the suction nozzle has a first nozzle diameter
- the first pressure nozzle has a second nozzle diameter
- the second pressure nozzle has a third nozzle diameter, the first nozzle diameter being greater than the second nozzle diameter and / or third nozzle diameter.
- the suction line has a first line diameter
- the first pressure line has a second line diameter
- the second pressure line has a third line diameter, the first line diameter being greater than the second line diameter and / or the third line diameter.
- the first and second pump motors each have a first and second impeller, the first pump motor being designed to drive the first impeller in one direction of rotation in order to pump washing liquid out of the first pressure chamber, and the second pump motor is designed to drive the second impeller in one direction of rotation in order to pump washing liquid from the second pressure chamber.
- the first or second pump motor comprises an electric motor, in particular a brushless direct current motor (BLDC motor) or a permanently excited, brushless synchronous drive.
- BLDC motor brushless direct current motor
- synchronous drive BLDC motor
- the laundry care device has a power detection element for detecting an electrical power value of the first or second pump motor
- the pump control is designed to determine a delivery pressure and / or delivery flow of the washing liquid in the first or second pressure line as a function of the detected power value
- the pump control is designed to change a speed of the first or second pump motor as a function of the specific delivery pressure and / or delivery flow.
- the speed of the first or second pump motor can be adapted to the delivery pressure of the washing liquid in the first or second pressure line.
- the delivery pressure of the washing liquid can depend, for example, on the positioning of the drain hose, in particular on the height of the outlet opening of the drain hose on the outside of the laundry care appliance.
- the user of the laundry care device can, for example, position the outlet opening of the drain hose on the floor of the room where the laundry care device is installed, which means that a low delivery pressure is required to pump out the washing liquid.
- the user of the laundry care device can alternatively position the outlet opening of the drain hose in an elevated position with respect to the laundry care device, as a result of which an increased delivery pressure occurs.
- the delivery pressure of the washing liquid can be determined and the speed of the first or second pump motor can be changed accordingly.
- the pump control can in particular have reference data (operating point data map) which were determined in advance during the device design phase at different delivery pressures of the laundry care device.
- an optimal speed of the pump motors can be set as a function of the specific delivery pressure, which prevents air from being sucked in through the inactive pressure connection or pressure line at different delivery pressures.
- the dependencies between the different operating points are summarized once in a characteristic map with the system design of the pumping system and then stored in the pump control.
- the object is achieved by a method for pumping washing liquid in a laundry care device with a pump for pumping washing liquid, the pump having a suction chamber with a suction nozzle for fluid connection with a suction line, a first pressure chamber with a first pressure nozzle for fluid connection with a first pressure line, and a second pressure chamber with a second pressure port for fluid connection with a second pressure line, and wherein the pump has a first pump motor for pumping the washing liquid from the first pressure chamber through the first pressure line with a first delivery flow and a having a second pump motor for pumping washing liquid out of the second pressure chamber through the second pressure line with a second delivery flow, and a pump control for controlling the first and second pump motors, solved, the method comprising activating one of the two pump motors in an activation time segment by the pump control, to pump washing liquid from the associated pressure chamber through the associated pressure line with the associated delivery flow, and the activation of the other of the two pump motors in the activation time segment by the
- FIG. 11 shows a schematic view of a general laundry care device 100, such as a washing machine.
- the laundry care device 100 comprises a rinsing bowl 101 into which washing care substance, such as detergent, can be filled.
- the laundry care device 100 comprises a door 103 for loading the laundry care device 100 with laundry.
- Fig. 2 shows a schematic view of a laundry care device with a pump.
- the laundry care device 100 comprises a tub 105 for receiving washing liquid, which comprises an inlet opening 107 and an outlet opening 109.
- the inlet opening 107 is fluidically connected to a suction line 111, which in turn is fluidically connected by a suction nozzle 113 to a pump 115, in particular to a suction chamber 117 of the pump 115.
- the pump 115 also has a first pressure chamber 119, in particular a pump-out pressure chamber, which is fluidically connected to a first pressure line 123, in particular a pump-out line, through a first pressure port 121, in particular a pump-out pressure port.
- the pump 115 also has a second pressure chamber 125, in particular pumping pressure chamber, which is fluidically connected to a second pressure line 129, in particular pumping line, by a second pressure port 127, in particular pumping pressure port.
- the pump 115 also has a first pump motor 131 for pumping washing liquid out of the first pressure chamber 119 into the first pressure line 123.
- the Pump 115 also has a second pump motor 133 for pumping washing liquid out of the second pressure chamber 125 into the second pressure line 129.
- the pump 115 also has a pump control 135 which is designed to control the first and second pump motors 131, 133.
- the pump control 135 activates the first pump motor 131 in order to pump washing liquid out of the first pressure chamber 119 through the first pressure line 123, in particular the drain line, with a first delivery stream 137 from the laundry care device 100.
- washing liquid can be pumped from the tub 105 through the drain opening 109 and through the suction line 111 into the suction chamber 117 of the pump 115, and the pumped washing liquid can be pumped from the suction chamber 117 through the first pressure chamber 119 and through the first pressure line 123 from the laundry care device 100 with the first delivery stream 137 are pumped out.
- the pump control 135 also activates the second pump motor 133 in order to pump or raise washing liquid from the second pressure chamber 125 through the second pressure line 129, in particular by pumping, up to a maximum washing liquid level 139 in the second pressure line 129.
- the pump control 135 controls the second pump motor 133 in particular in such a way that the maximum washing liquid level 139 is higher than the container level 141 of the washing liquid in the tub 105.
- the maximum washing liquid level 139 in the second pressure line 129 prevents air from being sucked in from the tub 105 through the second pressure line 129 during the pumping of washing liquid through the first pressure line 123 with the first delivery flow 137.
- FIG. 11 shows a schematic view of a laundry care device with a pump according to FIG Fig. 2 .
- the laundry care device 100 comprises a pump 115 with a suction chamber 117 and with a suction nozzle 113 which is fluidically connected by a suction line 111 to a drain opening 109 of a tub 105 of the laundry care device 100.
- the pump 115 also has a first pump motor 131 for pumping washing liquid out of a first pressure chamber 119 through a first pressure port 121 into a first pressure line 123.
- the pump 115 also has a second pump motor 133 for pumping washing liquid out of a second pressure chamber 125 through a second pressure port 127 into a second pressure line 129.
- the pump 115 also has a pump control 135 which is designed to control the first and second pump motors 131, 133.
- the pump control 135 activates the second pump motor 133 in order to pump washing liquid from the second pressure chamber 125 through the second pressure line 129, in particular a circulation line, with a second delivery flow 143 in the laundry care device 100.
- washing liquid is pumped from the tub 105 through the drain opening 109 and through the suction line 111 into the suction chamber 117 of the pump 115, and the pumped washing liquid is pumped from the suction chamber 117 through the second pressure chamber 125 and through the second pressure line 129 from the laundry care device 100 with the second delivery stream 143 is pumped out.
- the pump control 135 also activates the first pump motor 131 in order to pump or raise washing liquid from the first pressure chamber 119 up to a maximum washing liquid level 139 in the first pressure line 123, in particular the drain line.
- the pump control 135 controls the first pump motor 131 in such a way that the maximum washing liquid level 139 is higher than the container level 141 of the washing liquid in the tub 105, but there is still no permanent flow.
- the maximum washing liquid level 139 in the first pressure line 123 prevents air from being sucked in from outside the laundry care device 100 through the first pressure line 123 during the pumping of washing liquid through the second pressure line 129 with the second delivery flow 143.
- the suction pressure present in the respectively inactive pressure connection 121, 127 is balanced out in such a way that only a static water column with a maximum washing liquid level 139 is built up in the associated inactive pressure line 123, 129, with the maximum Adjusts the washing liquid level 139 to at least the same level as the tank level 141 in the tub 105.
- the pump speed of the first or second pump motor 131, 133 is set by the pump control 135 so coordinated that the water column in the inactive pressure line 123, 129 is raised, but there is no flow 137, 143 of washing liquid in the inactive pressure line 123, 129, but the washing liquid is only conveyed up to a pump speed-related maximum washing liquid level 139.
- a delivery pressure is therefore only built up when there is a low power requirement, but no permanent pump delivery flow is yet generated.
- a pressure sensor for detecting the pressure exerted on the tub 105 by the washing liquid can be arranged in the tub 105.
- the regulation of the speed of the pump motors 131, 133 by the pump control 135 can take place with the help of the pressure sensor depending on the detected pressure and the thus detected washing liquid level in the tub, so that the delivery flow 137, 143 of the washing liquid in the active pressure line 123, 129 at decreasing suction-side container level 141 in the tub 105 is lowered so that no air is sucked in from the inactive pressure line 123, 139.
- the flow cross-sections of the suction nozzle 113 and the suction line 111 should be dimensioned sufficiently large so that there are low flow velocities and thus low pressure losses on the suction side and thus a lower suction pressure, which makes it difficult to suck in the air due to the design .
- the regulation of the pump speed by the pump control 135 can additionally be implemented as a self-learning function in the software or can be specified by a pump characteristic map from the different operating points, which was worked out in the design phase.
- the speed specification for subsequent washing processes can be adapted using the pump gradients achieved using various previously carried out washing cycles. It is recorded when the boundary conditions have changed and when the conditions change, air is sucked in.
- programmed, preprogrammed changes can be made, for example to be able to react to effects caused by the service life, such as reducing the flow cross-sections over the service life through deposits, which generates higher pressure losses on the suction side and promotes the intake of air.
- the measures according to the invention ensure that when pumping out or pumping in the active pressure line 123, 129, a delivery stream 137, 143 of washing liquid is always built up without air being sucked in via the inactive pressure line 123, 129 and the delivery stream 137, 143 through the two-phase proportions of washing liquid and air is reduced.
- This enables short pump program steps that have a positive effect on the duration of certain wash care programs.
- pumping two-phase mixtures i.e. mixtures of washing liquid and air
- a demanding task arises for the pump speed control.
- increasing or reducing the speed of the pump 115 when pumping two-phase mixtures means an increased component load, which must be avoided.
- annoying operating noises arise from the delivery of a two-phase mixture when air is sucked in during delivery.
- the short period of alternating air intake can severely impair subjective noise perception.
- FIG. 4 shows a schematic representation of delivery flows of washing liquid occurring in a throttle curve test stand for recording characteristics.
- FIG. 13 shows a time representation of delivery flows in liters per minute, which are plotted along the ordinate axis 145 as a function of the time, which is specified along the abscissa axis 147 in seconds.
- the first curve 149 shows the course of the delivery flow 137 of washing liquid in the first pressure line 123, or pump-out line, when air is sucked in through the inactive pressure connection 127 and through the inactive second pressure line 129. If the pump 115 is operated, for example, when the tank level is low, so will at high Delivery flows that generate high flow velocities with small flow cross-sections, air is sucked in from the inactive second pressure line 129, the circulation line, so that the delivery flow 137 of the pump 115 briefly collapses and then occurs again. In the course of the curve of the first curve 149, the pulsating delivery flow 137 of the washing liquid becomes clear, the inertia of the washing liquid having a dampening effect.
- the second curve 151 shows the course of the delivery flow 137 of washing liquid in the first pressure line 123, or pump-out line within the meaning of the present invention, when no air is sucked in through the inactive pressure connection 127 and through the inactive second pressure line 129. Due to the maximum washing liquid level 139 in the inactive pressure line 129, the pump 115 can also be operated when the tank fill level is low, without air being sucked in from the inactive second pressure line 129, the circulation line. As in Fig. 4 is shown, no air is sucked in from the inactive, second pressure line 129 even with an increased delivery flow 137 of washing liquid in the first pressure line 123 or pump-off line. Thus, the delivery flow 137 of washing liquid does not collapse in the second pressure line 129, but remains constant.
- Fig. 5 shows a sequence of a method 200 for pumping washing liquid in a laundry care device 100, which according to FIG Fig. 2 and Fig. 3 is described.
- the method comprises the activation 201 of one of the two pump motors 131, 133 in an activation time segment by the pump control 135 in order to pump washing liquid from the associated pressure chamber 119, 125 through the associated pressure line 123, 129 with the associated delivery flow 137, 143.
- the method comprises activating 203 the other of the two pump motors 131, 133 in the activation time segment by the pump control 135 in order to pump washing liquid from the associated pressure chamber 119, 125 through the associated pressure line 123, 129 with the associated delivery flow 137, 143 in order to pump washing liquid from the associated pressure chamber 119, 125 through the associated pressure line 123, 129 up to a maximum washing liquid level 139 in the associated pressure line 123, 129 in order to prevent air being sucked in through the associated pressure line 123, 129.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Control Of Washing Machine And Dryer (AREA)
- Detail Structures Of Washing Machines And Dryers (AREA)
- Cleaning By Liquid Or Steam (AREA)
Description
Die vorliegende Erfindung betrifft ein Wäschepflegegerät mit einer Pumpenansteuerung für ein Umpumpsystem.The present invention relates to a laundry care device with a pump control for a pumping system.
Herkömmliche Wäschepflegegeräte mit hoher Beladungskapazität weisen in der Regel ein Umpumpsystem auf, durch welches Waschflüssigkeit aus dem Laugenbehälter abgepumpt und dem Laugenbehälter anschließend erneut zugeführt werden kann. Um Waschflüssigkeit nach dem Wäschepflegeprozess aus dem Wäschepflegegerät zu entfernen, verfügen herkömmliche Wäschepflegegeräte zudem über ein Abpumpsystem. Für das Umpumpsystem und das Abpumpsystem werden Pumpen benötigt, um ein wirksames Umpumpen der Waschflüssigkeit in dem Wäschepflegegerät, bzw. ein wirksames Abpumpen der Waschflüssigkeit aus dem Wäschepflegegerät zu gewährleisten.Conventional laundry care devices with a high loading capacity generally have a pumping system through which washing liquid can be pumped out of the tub and then fed back to the tub. In order to remove washing liquid from the laundry care device after the laundry care process, conventional laundry care devices also have a pumping system. Pumps are required for the pumping over system and the pumping out system in order to ensure an effective pumping of the washing liquid in the laundry care device or an effective pumping out of the washing liquid from the laundry care device.
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Es ist die der Erfindung zugrundeliegende Aufgabe, ein Wäschepflegegerät mit einer Pumpe anzugeben, welche ein wirksames Pumpen von Waschflüssigkeit in dem Wäschepflegegerät ermöglicht.The object on which the invention is based is to specify a laundry care device with a pump which enables washing liquid to be effectively pumped in the laundry care device.
Diese Aufgabe wird durch einen Gegenstand mit den Merkmalen nach den unabhängigen Ansprüchen gelöst. Vorteilhafte Ausführungsformen sind Gegenstand der abhängigen Ansprüche, der Beschreibung und der Zeichnungen.This object is achieved by an object having the features according to the independent claims. Advantageous embodiments are the subject matter of the dependent claims, the description and the drawings.
Gemäß einem Aspekt wird die erfindungsgemäße Aufgabe durch ein Wäschepflegegerät mit einer Pumpe zum Pumpen von Waschflüssigkeit, wobei die Pumpe eine Saugkammer mit einem Saugstutzen zum fluidtechnischen Verbinden mit einer Saugleitung, eine erste Druckkammer mit einem ersten Druckstutzen zum fluidtechnischen Verbinden mit einer ersten Druckleitung, und eine zweite Druckkammer mit einem zweiten Druckstutzen zum fluidtechnischen Verbinden mit einer zweiten Druckleitung aufweist, wobei die Pumpe einen ersten Pumpenmotor zum Pumpen der Waschflüssigkeit aus der ersten Druckkammer durch die erste Druckleitung mit einem ersten Förderstrom und einen zweiten Pumpenmotor zum Pumpen der Waschflüssigkeit aus der zweiten Druckkammer durch die zweite Druckleitung mit einem zweiten Förderstrom aufweist, und einer Pumpenansteuerung zum Steuern des ersten und zweiten Pumpenmotors gelöst, wobei die Pumpenansteuerung ausgebildet ist, in einem Aktivierungszeitabschnitt einen der beiden Pumpenmotoren zu aktivieren, um Waschflüssigkeit aus der zugehörigen Druckkammer durch die zugehörige Druckleitung mit dem zugehörigen Förderstrom zu pumpen, und wobei die Pumpenansteuerung ausgebildet ist, in dem Aktivierungszeitabschnitt den anderen der beiden Pumpenmotoren zu aktivieren, um Waschflüssigkeit aus der zugehörigen Druckkammer durch die zugehörige Druckleitung bis zu einem maximalen Waschflüssigkeitspegel in der zugehörigen Druckleitung zu pumpen, um ein Ansaugen von Luft durch die zugehörige Druckleitung zu verhindern.According to one aspect, the object according to the invention is provided by a laundry care device with a pump for pumping washing liquid, the pump having a suction chamber with a suction nozzle for fluid connection with a suction line, a first Pressure chamber with a first pressure port for fluid connection with a first pressure line, and a second pressure chamber with a second pressure connection for fluid connection with a second pressure line, the pump having a first pump motor for pumping the washing liquid from the first pressure chamber through the first pressure line with a having a first delivery flow and a second pump motor for pumping the washing liquid from the second pressure chamber through the second pressure line with a second delivery flow, and a pump control for controlling the first and second pump motors released, the pump control being designed to control one of the two pump motors in an activation time segment activate in order to pump washing liquid from the associated pressure chamber through the associated pressure line with the associated delivery flow, and the pump control is designed, in the activation time segment, the other of the two Pum Activate pen motors to pump washing liquid from the associated pressure chamber through the associated pressure line up to a maximum washing liquid level in the associated pressure line in order to prevent air from being sucked in through the associated pressure line.
Dadurch wird der technische Vorteil erreicht, dass durch das zeitgleiche Aktivieren der beiden Pumpenmotoren in dem Aktivierungszeitabschnitt durch die Pumpenansteuerung verhindert werden kann, dass durch die andere Druckleitung, die inaktive Druckleitung, Luft angesaugt werden kann. In dem Aktivierungszeitabschnitt wird Waschflüssigkeit durch eine der beiden Druckleitungen, der aktiven Druckleitung, mit einem Förderstrom gepumpt, und durch die andere der beiden Druckleitungen, der inaktiven Druckleitung, bis zu einem maximalen Waschflüssigkeitspegel in der inaktiven Druckleitung gepumpt bzw. nur ein Förderdruck aufgebaut wird, ohne dass sich ein dauerhafter Förderstrom einstellt und damit also nur die Wassersäule in der inaktiven Druckleitung angehoben wird, um ein Ansaugen von Luft zu verhindern, die den Förderstrom in der aktiven Druckleitung unterbrechen, bzw. reduzieren würde. Somit entsteht also in der anderen der beiden Druckleitungen, der inaktiven Druckleitung kein Förderstrom von Waschflüssigkeit, sondern die Waschflüssigkeit wird lediglich bis zu dem maximalen Waschflüssigkeitspegel in der inaktiven Druckleitung angehoben. Der maximale sich einstellende Waschflüssigkeitspegel ist ausreichend, um ein Ansaugen von Luft rückwärtsgewandt durch die inaktive Druckleitung zu verhindern, während zeitgleich durch die aktive Druckkammer und die aktive Druckleitung der Abpump- oder Umpumpprozess durchgeführt wird. Dies bedeutet konkret, dass stets beide Pumpemotoren angeschaltet sind, einer um den Pumpbetrieb (Ab- oder Umpumpen) zu gewährleisten und der andere, um ein Ansaugen von Luft über die inaktive Druckleitung zu verhindern.This has the technical advantage that the simultaneous activation of the two pump motors in the activation time segment by the pump control prevents air from being sucked in through the other pressure line, the inactive pressure line. In the activation period, washing liquid is pumped through one of the two pressure lines, the active pressure line, with a delivery flow, and through the other of the two pressure lines, the inactive pressure line, up to a maximum washing liquid level in the inactive pressure line or only a delivery pressure is built up, without a permanent flow rate being established and thus only the water column in the inactive pressure line being raised in order to prevent air being sucked in, which would interrupt or reduce the flow rate in the active pressure line. Thus, in the other of the two pressure lines, the inactive pressure line, there is no delivery flow of washing liquid, but the washing liquid is only raised up to the maximum washing liquid level in the inactive pressure line. The maximum washing liquid level that is established is sufficient to prevent air being sucked in backwards through the inactive pressure line, while the pumping or pumping process is carried out at the same time through the active pressure chamber and the active pressure line is carried out. In concrete terms, this means that both pump motors are always switched on, one to ensure pumping operation (pumping out or transferring) and the other to prevent air being sucked in via the inactive pressure line.
In herkömmlichen Wäschepflegegeräten mit einer Pumpe mit zwei Druckkammern, kann z.B. bei einem geringen Füllstand von Waschflüssigkeit in dem Laugenbehälter, bei großen Förderströmen, die große Strömungsgeschwindigkeiten bei geringen Strömungsquerschnitten generieren, Luft durch die inaktive Druckkammer angesaugt werden. Durch das Ansaugen von Luft durch die inaktive Druckkammer kann der Förderstrom der Pumpe kurzzeitig zusammenbrechen und sich dann wieder einstellen, wodurch sich ein pulsierender Förderstrom der Pumpe ergibt. Durch den pulsierenden Förderstrom der Pumpe ergibt sich eine zeitliche Förderstromreduzierung, also Performanceeinschränkung oder Performanceverlust, eine erhöhte Belastung der Pumpenbauteile, sowie eine höhere Belastung für den Nutzer durch den stark pulsierenden und lauten Geräuschpegel.In conventional laundry care devices with a pump with two pressure chambers, for example, with a low level of washing liquid in the tub, with large flow rates that generate high flow speeds with small flow cross-sections, air can be sucked in through the inactive pressure chamber. By sucking in air through the inactive pressure chamber, the delivery flow of the pump can briefly collapse and then adjust again, resulting in a pulsating delivery flow of the pump. The pulsating flow rate of the pump results in a reduction in flow rate over time, i.e. a performance restriction or loss of performance, an increased load on the pump components and a higher load for the user due to the strongly pulsating and loud noise level.
In der erfindungsgemäßen Pumpe hingegen kann durch das zeitgleiche Aktivieren beider Pumpenmotoren sichergestellt werden, dass beim Fördern von Waschlauge durch eine der beiden Druckleitungen, durch die aktive Druckleitung, insbesondere die Abpumpleitung oder Umpumpleitung, ein konstanter Förderstrom von Waschflüssigkeit in der Abpumpleitung oder Umpumpleitung aufgebaut werden kann. Hierbei werden die beiden Pumpenmotoren jedoch durch die Pumpenansteuerung mit unterschiedlichen Drehzahlen angetrieben, so dass in der anderen der beiden Druckleitungen, der inaktiven Druckleitung, die Waschflüssigkeit nur bis zu dem maximalen Waschflüssigkeitspegel gepumpt wird und somit kein Förderstrom in der inaktiven Druckleitung entsteht. Der maximale Waschflüssigkeitspegel in der inaktiven Druckleitung ist ausreichend, um ein Ansaugen von Luft durch die inaktive Druckleitung zu verhindern.In the pump according to the invention, on the other hand, by activating both pump motors at the same time, it can be ensured that when pumping washing liquor through one of the two pressure lines, through the active pressure line, in particular the pump-off line or pump-around line, a constant flow of washing liquid can be built up in the pump-off line or pump-around line . In this case, however, the two pump motors are driven by the pump control at different speeds, so that in the other of the two pressure lines, the inactive pressure line, the washing liquid is only pumped up to the maximum washing liquid level and thus no flow is created in the inactive pressure line. The maximum washing liquid level in the inactive pressure line is sufficient to prevent air being sucked in through the inactive pressure line.
Unter einem Wäschepflegegerät wird ein Gerät verstanden, welches zur Wäschepflege eingesetzt wird, wie z.B. eine Waschmaschine oder ein Wäschetrockner. Insbesondere wird unter solch einem Wäschepflegegerät ein Haushaltswäschepflegegerät verstanden. Also ein Wäschepflegegerät, welches im Rahmen der Haushaltsführung verwendet wird, und mit dem Wäsche in haushaltsüblichen Mengen behandelt wird.A laundry care device is understood to mean a device that is used for laundry care, such as a washing machine or a tumble dryer. In particular, such a laundry care device is understood to mean a household laundry care device. So a laundry care device, which is used in the context of housekeeping, and with which laundry is treated in household quantities.
In einer vorteilhaften Ausführungsform des Wäschepflegegeräts weist das Wäschepflegegerät einen Laugenbehälter zur Aufnahme von Waschflüssigkeit auf, wobei die Waschflüssigkeit in dem Laugenbehälter einen Behälterpegel aufweist, wobei der maximale Waschflüssigkeitspegel in der zugehörigen Druckleitung eine Höhe aufweist, welche mindestens so groß wie die Höhe des Behälterpegels der Waschflüssigkeit in dem Laugenbehälter ist.In an advantageous embodiment of the laundry care device, the laundry care device has a tub for receiving washing liquid, the washing liquid in the tub having a container level, the maximum washing liquid level in the associated pressure line having a height which is at least as great as the height of the washing liquid container level is in the tub.
Dadurch wird der technische Vorteil erreicht, dass durch die Höhe des maximalen Waschflüssigkeitspegels in der inaktiven Druckleitung, welche größer als die Höhe des Behälterpegels der Waschflüssigkeit in dem Laugenbehälter ist, in einem ausreichenden Maße sichergestellt wird, dass keine Luft durch die in der Druckleitung stehende Waschflüssigkeitssäule angesaugt wird.This achieves the technical advantage that the height of the maximum washing liquid level in the inactive pressure line, which is greater than the height of the container level of the washing liquid in the tub, ensures to a sufficient extent that no air passes through the washing liquid column in the pressure line is sucked in.
In einer weiteren vorteilhaften Ausführungsform des Wäschepflegegeräts weist das Wäschepflegegerät einen Laugenbehälter zur Aufnahme von Waschflüssigkeit und einen Drucksensor zum Erfassen des von der Waschflüssigkeit auf den Laugenbehälter ausgeübten Drucks auf, wobei der Laugenbehälter mit der Saugleitung fluidtechnisch verbunden ist, und wobei die Pumpenansteuerung ausgebildet ist, eine Drehzahl der Pumpenmotoren in Abhängigkeit des erfassten Drucks zu steuern, um ein Ansaugen von Luft durch die zugehörige Druckleitung zu verhindern.In a further advantageous embodiment of the laundry care device, the laundry care device has a tub for receiving washing liquid and a pressure sensor for detecting the pressure exerted by the washing liquid on the tub, the tub being fluidically connected to the suction line, and the pump control being designed, a To control the speed of the pump motors as a function of the detected pressure in order to prevent air being sucked in through the associated pressure line.
Dadurch wird der technische Vorteil erreicht, dass durch das Steuern der Drehzahl der Pumpenmotoren in Abhängigkeit des erfassten Drucks, die Pumpleistung der Pumpe in Abhängigkeit von dem Füllstand der Waschflüssigkeit in dem Laugenbehälter wirksam reguliert werden kann. Somit kann sichergestellt werden, dass bei einem sinkenden Füllstand der Waschflüssigkeit in dem Laugenbehälter, der Förderstrom der gepumpten Waschflüssigkeit reduziert werden kann, wodurch verhindert wird, dass Luft aus der inaktiven Druckleitung angesaugt werden kann. Dies ist ein vorteilhaftes Pumpenansteuerungsverfahren für Umpumpsysteme, was besonders vorteilhaft ist, wenn steuerungstechnisch die beiden Pumpenantriebe nicht zeitgleich betrieben werden können. Dies ist dann der Fall, wenn ansteuerungstechnisch ein Pumpeninverter für beide Pumpenantriebe alternierend zum Einsatz kommt.This achieves the technical advantage that by controlling the speed of the pump motors as a function of the detected pressure, the pump output of the pump can be effectively regulated as a function of the fill level of the washing liquid in the tub. It can thus be ensured that when the filling level of the washing liquid in the tub, the delivery flow of the pumped washing liquid can be reduced, which prevents air from being sucked in from the inactive pressure line. This is an advantageous pump control method for pumping systems, which is particularly advantageous if the two pump drives cannot be operated at the same time in terms of control technology. This is the case when, in terms of control technology, a pump inverter is used alternately for both pump drives.
In einer weiteren vorteilhaften Ausführungsform des Wäschepflegegeräts ist die Pumpenansteuerung ausgebildet, die Drehzahl der Pumpenmotoren zu reduzieren, wenn der erfasste Druck einen vorbestimmten Druckschwellenwert unterschreitet.In a further advantageous embodiment of the laundry care device, the pump control is designed to reduce the speed of the pump motors when the detected pressure falls below a predetermined pressure threshold value.
Dadurch wird der technische Vorteil erreicht, dass sichergestellt werden kann, dass bei einem sinkenden Füllstand der Waschflüssigkeit in dem Laugenbehälter verhindert wird, dass Luft aus der inaktiven Druckleitung angesaugt wird.This has the technical advantage that it can be ensured that, when the fill level of the washing liquid in the tub is falling, it is prevented that air is sucked in from the inactive pressure line.
In einer weiteren vorteilhaften Ausführungsform des Wäschepflegegeräts ist die Pumpenansteuerung ausgebildet, in dem Aktivierungszeitabschnitt den ersten Pumpenmotor zu aktivieren, um Waschflüssigkeit aus der ersten Druckkammer durch die erste Druckleitung mit dem ersten Förderstrom abzupumpen, und ist die Pumpenansteuerung ausgebildet, in dem Aktivierungszeitabschnitt den zweiten Pumpenmotor zu aktivieren, um Waschflüssigkeit aus der zweiten Druckkammer bis zu einem maximalen Waschflüssigkeitspegel in der zweiten Druckleitung zu pumpen.In a further advantageous embodiment of the laundry care device, the pump control is designed to activate the first pump motor in the activation time segment in order to pump washing liquid out of the first pressure chamber through the first pressure line with the first delivery flow, and the pump control is designed to close the second pump motor in the activation time segment Activate to pump washing liquid from the second pressure chamber up to a maximum washing liquid level in the second pressure line.
Dadurch wird der technische Vorteil erreicht, dass durch das zeitgleiche Aktivieren der beiden Pumpenmotoren in dem Aktivierungszeitabschnitt durch die Pumpenansteuerung sichergestellt wird, dass Waschflüssigkeit durch die erste Druckleitung mit dem ersten Förderstrom wirksam gepumpt werden kann, und dass verhindert wird, dass durch die zweite, inaktive, Druckleitung Luft angesaugt wird. Für diese Pumpenansteuerungskonfiguration muss allerdings konzeptseitig für jeden Pumpenantrieb ein separater Pumpeninverter vorgesehen sein, der zum entsprechenden Zeitpunkt bei dem existierenden Laugenbehälter-Waschwasserfüllstand die entsprechenden Drehzahlniveaus für die entsprechende Pumpe vorgibt.This achieves the technical advantage that the simultaneous activation of the two pump motors in the activation time segment by the pump control ensures that washing liquid can be effectively pumped through the first pressure line with the first delivery flow, and that it is prevented that the second, inactive , Pressure line air is sucked in. For this pump control configuration, however, a separate pump inverter must be provided in the concept for each pump drive, which specifies the corresponding speed levels for the corresponding pump at the corresponding point in time for the existing tub washing water fill level.
In einer weiteren vorteilhaften Ausführungsform des Wäschepflegegeräts umfasst die erste Druckkammer eine Abpumpdruckkammer, umfasst der erste Druckstutzen einen Abpumpdruckstutzen, und umfasst die erste Druckleitung eine Abpumpleitung, wobei der erste Pumpenmotor ausgebildet ist, Waschflüssigkeit in dem Aktivierungszeitabschnitt aus der Abpumpdruckkammer durch die Abpumpleitung mit einem Abpumpförderstrom aus dem Wäschepflegegerät abzupumpen.In a further advantageous embodiment of the laundry care device, the first pressure chamber comprises a pump-out pressure chamber, the first pressure nozzle comprises a pump-out pressure nozzle, and the first pressure line comprises a pump-out line, the first pump motor being designed to discharge washing liquid in the activation time segment from the pump-out pressure chamber through the pump-out line with a pump-out delivery flow to pump out the laundry care device.
Dadurch wird der technische Vorteil erreicht, dass in dem ersten Aktivierungszeitabschnitt durch die Aktivierung des ersten Pumpenmotors ein wirksames Abpumpen von Waschflüssigkeit aus der Abpumpdruckkammer durch die Abpumpleitung aus dem Wäschepflegegerät sichergestellt wird.This achieves the technical advantage that, in the first activation time segment, the activation of the first pump motor ensures that washing liquid is effectively pumped out of the pump-out pressure chamber through the pump-out line from the laundry care device.
In einer weiteren vorteilhaften Ausführungsform des Wäschepflegegeräts ist die Pumpenansteuerung ausgebildet, in einem weiteren Aktivierungszeitabschnitt den zweiten Pumpenmotor zu aktivieren, um Waschflüssigkeit aus der zweiten Druckkammer durch die zweite Druckleitung mit dem zweiten Förderstrom abzupumpen, und dass die Pumpenansteuerung ausgebildet ist, in dem weiteren Aktivierungszeitabschnitt den ersten Pumpenmotor zu aktivieren, um Waschflüssigkeit aus der ersten Druckkammer bis zu einem maximalen Waschflüssigkeitspegel in der ersten Druckleitung zu pumpen.In a further advantageous embodiment of the laundry care device, the pump control is designed to activate the second pump motor in a further activation time segment in order to pump washing liquid out of the second pressure chamber through the second pressure line with the second delivery flow, and that the pump control is designed in the further activation time segment activate the first pump motor to pump washing liquid from the first pressure chamber up to a maximum washing liquid level in the first pressure line.
Dadurch wird der technische Vorteil erreicht, dass durch das zeitgleiche, drehzahlunabhängige Aktivieren der beiden Pumpenmotoren in dem weiteren Aktivierungszeitabschnitt durch die Pumpenansteuerung sichergestellt wird, dass Waschflüssigkeit durch die zweite Druckleitung mit dem zweiten Förderstrom wirksam gepumpt werden kann bzw. durch den Förderdruck eine Waschflüssigkeitssäule angehoben wird, und dass verhindert wird, dass durch die erste Druckleitung Luft angesaugt wird.This has the technical advantage that the simultaneous, speed-independent activation of the two pump motors in the further activation time segment by the pump control ensures that washing liquid can be effectively pumped through the second pressure line with the second delivery flow or that a washing liquid column is raised by the delivery pressure , and that it is prevented that air is sucked in through the first pressure line.
In einer weiteren vorteilhaften Ausführungsform des Wäschepflegegeräts umfasst die zweite Druckkammer eine Umpumpdruckkammer, umfasst der zweite Druckstutzen einen Umpumpdruckstutzen, und umfasst die zweite Druckleitung eine Umpumpleitung, wobei der zweite Pumpenmotor ausgebildet ist, Waschflüssigkeit in dem weiteren Aktivierungszeitabschnitt aus der Umpumpdruckkammer durch die Umpumpleitung mit einem Umpumpförderstrom in dem Wäschepflegegerät umzupumpen.In a further advantageous embodiment of the laundry care device, the second pressure chamber comprises a pumping pressure chamber, the second pressure port comprises a pumping pressure port, and the second pressure line comprises a pumping line, the second pump motor being designed, washing liquid in the further activation period from the pumping pressure chamber through the pumping line with a pumping flow to pump in the laundry care device.
Dadurch wird der technische Vorteil erreicht, dass in dem weiteren Aktivierungszeitabschnitt durch das Aktivieren des zweiten Pumpenmotors ein wirksames Pumpen von Waschflüssigkeit aus der Umpumpdruckkammer durch die Umpumpleitung in dem Wäschepflegegerät sichergestellt wird.This achieves the technical advantage that, in the further activation time segment, the activation of the second pump motor ensures effective pumping of washing liquid from the pumping pressure chamber through the pumping line in the laundry care device.
In einer weiteren vorteilhaften Ausführungsform des Wäschepflegegeräts weist das Wäschepflegegerät einen Laugenbehälter auf, sind die Saugleitung und die Umpumpleitung jeweils mit dem Laugenbehälter fluidtechnisch verbunden, wobei der zweite Pumpenmotor ausgebildet ist, Waschflüssigkeit aus dem Laugenbehälter durch die Saugleitung abzupumpen, und die abgepumpte Waschflüssigkeit durch die Umpumpleitung mit einem Umpumpförderstrom erneut in den Laugenbehälter zu pumpen.In a further advantageous embodiment of the laundry care device, the laundry care device has a tub, the suction line and the pumping line are each fluidly connected to the tub, the second pump motor being designed to pump washing liquid out of the tub through the suction line, and the pumped washing liquid through the pumping line to pump again into the tub with a pumping flow.
Dadurch wird der technische Vorteil erreicht, dass durch das fluidtechnische Verbinden der Saugleitung und der Umpumpleitung mit dem Laugenbehälter, sichergestellt wird, dass ein wirksames Umpumpen von Waschflüssigkeit sichergestellt wird.This has the technical advantage that the fluidic connection of the suction line and the circulation line to the tub ensures that the washing liquid is effectively pumped around.
In einer weiteren vorteilhaften Ausführungsform des Wäschepflegegeräts weist der Saugstutzen einen ersten Stutzendurchmesser auf, weist der erste Druckstutzen einen zweiten Stutzendurchmesser auf, und weist der zweite Druckstutzen einen dritten Stutzendurchmesser auf, wobei der erste Stutzendurchmesser größer als der zweite Stutzendurchmesser und/oder dritte Stutzendurchmesser ist.In a further advantageous embodiment of the laundry care device, the suction nozzle has a first nozzle diameter, the first pressure nozzle has a second nozzle diameter, and the second pressure nozzle has a third nozzle diameter, the first nozzle diameter being greater than the second nozzle diameter and / or third nozzle diameter.
Dadurch wird der technische Vorteil erreicht, dass durch den großen ersten Stutzendurchmessers des Saugstutzens ein großer saugseitiger Strömungsquerschnitt erreicht wird und sich damit langsamere Strömungsgeschwindigkeiten saugseitig einstellen. Dadurch sind geringe, saugseitige Druckverluste und es stellt sich somit ein höherer Saugdruck ein als sich vergleichsweise bei höheren Strömungsgeschwindigkeiten ergeben würde, wodurch das Ansaugen von Luft konstruktiv erschwert wird.This has the technical advantage that a large flow cross-section on the suction side is achieved through the large first connection diameter of the suction connection, and thus slower flow velocities are set on the suction side. As a result, there are low pressure losses on the suction side and a higher suction pressure is established than would result in comparison with higher flow velocities, as a result of which the suction of air is structurally more difficult.
In einer weiteren vorteilhaften Ausführungsform des Wäschepflegegeräts weist die Saugleitung einen ersten Leitungsdurchmesser auf, weist die erste Druckleitung einen zweiten Leitungsdurchmesser auf, und weist die zweite Druckleitung einen dritten Leitungsdurchmesser auf, wobei der erste Leitungsdurchmesser größer als der zweite Leitungsdurchmesser und/oder dritte Leitungsdurchmesser ist.In a further advantageous embodiment of the laundry care device, the suction line has a first line diameter, the first pressure line has a second line diameter, and the second pressure line has a third line diameter, the first line diameter being greater than the second line diameter and / or the third line diameter.
Dadurch wird der technische Vorteil erreicht, dass durch den großen ersten Leitungsdurchmesser der Saugleitung ein großer saugseitiger Strömungsquerschnitt erreicht wird und sich damit langsamere Strömungsgeschwindigkeiten saugseitig einstellen. Dadurch sind geringe, saugseitige Druckverluste erzielbar und es stellt sich somit ein höherer Saugdruck ein, als sich vergleichsweise bei höheren Strömungsgeschwindigkeiten ergeben würde, wodurch das Ansaugen von Luft konstruktiv erschwert wird.This has the technical advantage that the large first line diameter of the suction line results in a large flow cross-section on the suction side and thus slower flow velocities are set on the suction side. As a result, low pressure losses on the suction side can be achieved and it arises thus a higher suction pressure than would result in comparison with higher flow velocities, whereby the suction of air is structurally more difficult.
In einer weiteren vorteilhaften Ausführungsform des Wäschepflegegeräts weisen der erste und zweite Pumpenmotor jeweils ein erstes und zweites Laufrad auf, wobei der erste Pumpenmotor ausgebildet ist, das erste Laufrad in einer Drehrichtung anzutreiben, um Waschflüssigkeit aus der ersten Druckkammer zu pumpen, und wobei der zweite Pumpenmotor ausgebildet ist, das zweite Laufrad in einer Drehrichtung anzutreiben, um Waschflüssigkeit aus der zweite Druckkammer zu pumpen.In a further advantageous embodiment of the laundry care device, the first and second pump motors each have a first and second impeller, the first pump motor being designed to drive the first impeller in one direction of rotation in order to pump washing liquid out of the first pressure chamber, and the second pump motor is designed to drive the second impeller in one direction of rotation in order to pump washing liquid from the second pressure chamber.
Dadurch wird der technische Vorteil erreicht, dass durch die Pumpenmotoren mit Laufrad ein wirksames Pumpen von Waschflüssigkeit aus der ersten oder zweiten Druckkammer ermöglicht wird.This achieves the technical advantage that the pump motors with impellers enable an effective pumping of washing liquid from the first or second pressure chamber.
In einer weiteren vorteilhaften Ausführungsform des Wäschepflegegeräts umfasst der erste oder zweite Pumpenmotor einen Elektromotor, insbesondere einen bürstenlosen Gleichstrommotor (BLDC-Motor) oder einen permanenterregten, bürstenlosen Synchronantrieb.In a further advantageous embodiment of the laundry care device, the first or second pump motor comprises an electric motor, in particular a brushless direct current motor (BLDC motor) or a permanently excited, brushless synchronous drive.
Dadurch wird der technische Vorteil erreicht, dass durch den Elektromotor, insbesondere einen bürstenlosen Gleichstrommotor (BLDC-Motor), bzw. Synchronantrieb ein besonders wirksamer, drehzahlvariabler Pumpenbetrieb sichergestellt werden kann.This has the technical advantage that the electric motor, in particular a brushless direct current motor (BLDC motor) or synchronous drive, can ensure a particularly effective, variable-speed pump operation.
In einer weiteren vorteilhaften Ausführungsform des Wäschepflegegeräts weist das Wäschepflegegerät ein Leistungserfassungselement zum Erfassen eines elektrischen Leistungswertes des ersten oder zweiten Pumpenmotors auf, ist die Pumpenansteuerung ausgebildet einen Förderdruck und/oder Förderstrom der Waschflüssigkeit in der ersten oder zweiten Druckleitung in Abhängigkeit des erfassten Leistungswertes zu bestimmen, und ist die Pumpenansteuerung ausgebildet, eine Drehzahl des ersten oder zweiten Pumpenmotors in Abhängigkeit des bestimmten Förderdrucks und/oder Förderstroms zu ändern.In a further advantageous embodiment of the laundry care device, the laundry care device has a power detection element for detecting an electrical power value of the first or second pump motor, the pump control is designed to determine a delivery pressure and / or delivery flow of the washing liquid in the first or second pressure line as a function of the detected power value, and the pump control is designed to change a speed of the first or second pump motor as a function of the specific delivery pressure and / or delivery flow.
Dadurch wird der technische Vorteil erreicht, dass die Drehzahl des ersten oder zweiten Pumpenmotors an den Förderdruck der Waschflüssigkeit in der ersten oder zweiten Druckleitung angepasst werden kann. Der Förderdruck der Waschflüssigkeit kann bei einem Abpumpvorgang beispielsweise von der Positionierung des Ablaufschlauches abhängen, insbesondere von der Höhe der Auslassöffnung des Ablaufschlauches an der Außenseite des Wäschepflegegeräts. Der Nutzer des Wäschepflegegerätes kann beispielsweise die Auslassöffnung des Ablaufschlauches auf dem Boden des Aufstellraumes des Wäschepflegegerätes positionieren, wodurch ein geringer Förderdruck zum Abpumpen der Waschflüssigkeit notwendig ist. Der Nutzer des Wäschepflegegeräts kann alternativ die Auslassöffnung des Ablaufschlauches in einer erhöhten Position gegenüber dem Wäschepflegegerät positionieren, wodurch ein erhöhter Förderdruck auftritt. Durch das Erfassen des elektrischen Leistungswertes des ersten oder zweiten Pumpenmotors kann der Förderdruck der Waschflüssigkeit bestimmt werden, und die Drehzahl des ersten oder zweiten Pumpenmotors entsprechend geändert werden. Hierzu kann die Pumpenansteuerung insbesondere über Referenzdaten (Betriebspunkt-Datenkennfeld) verfügen, welche bei verschiedenen Förderdrücken des Wäschepflegegeräts vorab während der Geräteauslegungsphase bestimmt wurden. Dadurch kann in Abhängigkeit des bestimmten Förderdrucks eine optimale Drehzahl der Pumpenmotoren eingestellt werden, wodurch verhindert wird, dass bei unterschiedlichen Förderdrücken Luft durch den inaktiven Druckstutzen bzw. Druckleitung angesaugt wird. Die Abhängigkeiten zwischen den unterschiedlichen Betriebspunkten (Drehzahl, Antriebsleistung, Förderdruck bzw. Förderhöhe und Förderstrom) sind mit der Systemauslegung des Umpumpsystems einmalig in einem Kennfeld zusammengefasst und anschließend in der Pumpenansteuerung hinterlegt.This has the technical advantage that the speed of the first or second pump motor can be adapted to the delivery pressure of the washing liquid in the first or second pressure line. During a pumping process, the delivery pressure of the washing liquid can depend, for example, on the positioning of the drain hose, in particular on the height of the outlet opening of the drain hose on the outside of the laundry care appliance. The user of the laundry care device can, for example, position the outlet opening of the drain hose on the floor of the room where the laundry care device is installed, which means that a low delivery pressure is required to pump out the washing liquid. The user of the laundry care device can alternatively position the outlet opening of the drain hose in an elevated position with respect to the laundry care device, as a result of which an increased delivery pressure occurs. By detecting the electrical power value of the first or second pump motor, the delivery pressure of the washing liquid can be determined and the speed of the first or second pump motor can be changed accordingly. For this purpose, the pump control can in particular have reference data (operating point data map) which were determined in advance during the device design phase at different delivery pressures of the laundry care device. As a result, an optimal speed of the pump motors can be set as a function of the specific delivery pressure, which prevents air from being sucked in through the inactive pressure connection or pressure line at different delivery pressures. The dependencies between the different operating points (speed, drive power, delivery pressure or delivery head and delivery flow) are summarized once in a characteristic map with the system design of the pumping system and then stored in the pump control.
Gemäß einem zweiten Aspekt der Erfindung wird die Aufgabe durch ein Verfahren zum Pumpen von Waschflüssigkeit in einem Wäschepflegegerät mit einer Pumpe zum Pumpen von Waschflüssigkeit gelöst, wobei die Pumpe eine Saugkammer mit einem Saugstutzen zum fluidtechnischen Verbinden mit einer Saugleitung, eine erste Druckkammer mit einem ersten Druckstutzen zum fluidtechnischen Verbinden mit einer ersten Druckleitung, und eine zweite Druckkammer mit einem zweiten Druckstutzen zum fluidtechnischen Verbinden mit einer zweiten Druckleitung aufweist, und wobei die Pumpe einen ersten Pumpenmotor zum Pumpen der Waschflüssigkeit aus der ersten Druckkammer durch die erste Druckleitung mit einem ersten Förderstrom und einen zweiten Pumpenmotor zum Abpumpen von Waschflüssigkeit aus der zweiten Druckkammer durch die zweite Druckleitung mit einem zweiten Förderstrom aufweist, und einer Pumpenansteuerung zum Steuern des ersten und zweiten Pumpenmotors, gelöst, wobei das Verfahren das Aktivieren eines der beiden Pumpenmotoren in einem Aktivierungszeitabschnitt durch die Pumpenansteuerung umfasst, um Waschflüssigkeit aus der zugehörigen Druckkammer durch die zugehörige Druckleitung mit dem zugehörigen Förderstrom zu pumpen, und das Aktivieren des anderen der beiden Pumpenmotoren in dem Aktivierungszeitabschnitt durch die Pumpenansteuerung umfasst, um Waschflüssigkeit aus der zugehörigen Druckkammer durch die zugehörige Druckleitung bis zu einem maximalen Waschflüssigkeitspegel in der zugehörigen Druckleitung zu pumpen, um ein Ansaugen von Luft durch die zugehörige Druckleitung zu verhindern.According to a second aspect of the invention, the object is achieved by a method for pumping washing liquid in a laundry care device with a pump for pumping washing liquid, the pump having a suction chamber with a suction nozzle for fluid connection with a suction line, a first pressure chamber with a first pressure nozzle for fluid connection with a first pressure line, and a second pressure chamber with a second pressure port for fluid connection with a second pressure line, and wherein the pump has a first pump motor for pumping the washing liquid from the first pressure chamber through the first pressure line with a first delivery flow and a having a second pump motor for pumping washing liquid out of the second pressure chamber through the second pressure line with a second delivery flow, and a pump control for controlling the first and second pump motors, solved, the method comprising activating one of the two pump motors in an activation time segment by the pump control, to pump washing liquid from the associated pressure chamber through the associated pressure line with the associated delivery flow, and the activation of the other of the two pump motors in the activation time segment by the pump control comprises to pump washing liquid from the associated pressure chamber through the associated pressure line up to a maximum washing liquid level in the associated pressure line to pump in order to prevent air being sucked in through the associated pressure line.
Dadurch wird der technische Vorteil erreicht, dass durch das Aktiveren des anderen der beiden Pumpenmotoren in dem Aktivierungszeitabschnitt sichergestellt wird, dass durch die andere der beiden Druckleitungen, der inaktiven Druckleitung, keine Luft angesaugt wird, wodurch ein wirksamer Betrieb der Pumpe mit konstantem Förderstrom der Pumpe sichergestellt werden kann.This has the technical advantage that activating the other of the two pump motors in the activation period ensures that no air is sucked in through the other of the two pressure lines, the inactive pressure line, which means that the pump operates effectively with a constant flow rate of the pump can be ensured.
Für dieses Ansteuerungskonzept für das Umpumpsystem bei dem die beiden Pumpenantriebe zeitgleich betrieben werden müssen, müssen auch zwei Pumpenansteuerungsinverter vorgesehen werden, die für die unterschiedlichen Antriebe unabhängig Drehzahl und Last regeln.For this control concept for the pumping system in which the two pump drives must be operated at the same time, two pump control inverters must also be provided, which regulate the speed and load independently for the different drives.
Weitere Ausführungsbeispiele werden Bezug nehmend auf die beiliegenden Zeichnungen erläutert. Es zeigen:
- Fig. 1
- eine schematische Ansicht eines Wäschepflegegeräts;
- Fig. 2
- eine schematische Ansicht eines Wäschepflegegeräts mit einer Pumpe;
- Fig. 3
- eine schematische Ansicht eines Wäschepflegegeräts mit einer Pumpe;
- Fig. 4
- eine schematische Darstellung von auftretenden Förderströmen von Waschflüssigkeit in einem Drosselkurven-Prüfstand zur Kennlinienerfassung; und
- Fig. 5
- einen Ablauf eines Verfahrens zum Pumpen von Waschflüssigkeit in einem Wäschepflegegerät.
- Fig. 1
- a schematic view of a laundry care device;
- Fig. 2
- a schematic view of a laundry care device with a pump;
- Fig. 3
- a schematic view of a laundry care device with a pump;
- Fig. 4
- a schematic representation of occurring delivery flows of washing liquid in a throttle curve test stand for characteristic curve detection; and
- Fig. 5
- a sequence of a method for pumping washing liquid in a laundry care device.
Die Pumpe 115 weist ferner einen ersten Pumpenmotor 131 zum Abpumpen von Waschflüssigkeit aus der ersten Druckkammer 119 in die erste Druckleitung 123 auf. Die Pumpe 115 weist ferner einen zweiten Pumpenmotor 133 zum Abpumpen von Waschflüssigkeit aus der zweiten Druckkammer 125 in die zweite Druckleitung 129 auf. Die Pumpe 115 weist ferner eine Pumpenansteuerung 135 auf, welche ausgebildet ist, den ersten und zweiten Pumpenmotor 131, 133 zu steuern.The
In der in
Die Pumpenansteuerung 135 aktiviert ferner den zweiten Pumpenmotor 133, um Waschflüssigkeit aus der zweiten Druckkammer 125 durch die zweite Druckleitung 129, insbesondere Umpumpleitung, bis zu einem maximalen Waschflüssigkeitspegel 139 in der zweiten Druckleitung 129 zu pumpen bzw. anzuheben. Hier steuert die Pumpenansteuerung 135 den zweiten Pumpenmotor 133 insbesondere derart, dass der maximale Waschflüssigkeitspegel 139 höher als der Behälterpegel 141 der Waschflüssigkeit in dem Laugenbehälter 105 ist. Durch den in der zweiten Druckleitung 129 stehenden maximalen Waschflüssigkeitspegel 139 wird verhindert, dass während des Pumpens von Waschflüssigkeit durch die erste Druckleitung 123 mit dem ersten Förderstrom 137 Luft aus dem Laugenbehälter 105 durch die zweite Druckleitung 129 angesaugt wird.The
In der in
Die Pumpenansteuerung 135 aktiviert ferner den ersten Pumpenmotor 131, um Waschflüssigkeit aus der ersten Druckkammer 119 bis zu einem maximalen Waschflüssigkeitspegel 139 in der ersten Druckleitung 123, insbesondere Ablaufleitung, zu pumpen bzw. anzuheben. Hier steuert die Pumpenansteuerung 135 den ersten Pumpenmotor 131 derart, dass der maximale Waschflüssigkeitspegel 139 höher als der Behälterpegel 141 der Waschflüssigkeit in dem Laugenbehälter 105 ist, aber noch keine dauerhafte Strömung entsteht. Durch den in der ersten Druckleitung 123 stehenden maximalen Waschflüssigkeitspegel 139 wird verhindert, dass während des Pumpens von Waschflüssigkeit durch die zweite Druckleitung 129 mit dem zweiten Förderstrom 143 Luft von außerhalb des Wäschepflegegeräts 100 durch die erste Druckleitung 123 angesaugt wird.The
Somit wird durch das zeitgleiche Ansteuern der beiden Pumpenmotoren 131, 133 der vorliegende Saugdruck im jeweils inaktiven Druckstutzen 121, 127 so ausgeglichen, dass nur eine statische Wassersäule mit einem maximalen Waschflüssigkeitspegel 139 in der zugehörigen inaktiven Druckleitung 123, 129 aufgebaut wird, wobei sich der maximale Waschflüssigkeitspegel 139 mindestens auf dem gleichen Füllstandniveau einstellt, wie der Behälterpegel 141 im Laugenbehälter 105. Hierbei wird die Pumpendrehzahl des ersten oder zweiten Pumpenmotors 131, 133 durch die Pumpenansteuerung 135 so abgestimmt, dass die Wassersäule in der inaktiven Druckleitung 123, 129 angehoben wird, es sich aber in der inaktiven Druckleitung 123, 129 kein Förderstrom 137, 143 von Waschflüssigkeit einstellt, sondern die Waschflüssigkeit nur bis zu einem Pumpendrehzahl-bedingten maximalen Waschflüssigkeitspegel 139 gefördert wird. Es wird also nur bei einem geringen Leistungsbedarf ein Förderdruck aufgebaut, aber noch kein dauerhafter Pumpenförderstrom generiert.Thus, through the simultaneous activation of the two
Zudem kann in dem Laugenbehälter 105 ein Drucksensor zum Erfassen des von der Waschflüssigkeit auf den Laugenbehälter 105 ausgeübten Drucks angeordnet sein. Das Regulieren der Drehzahl der Pumpenmotoren 131, 133 durch die Pumpenansteuerung 135 kann mit Hilfe des Drucksensors in Abhängigkeit von dem erfassten Druck und dem damit erfassten Waschflüssigkeitspegel im Laugenbehälter erfolgen, so dass der Förderstrom 137, 143 der Waschflüssigkeit in der aktiven Druckleitung 123, 129 bei sinkendem saugseitigen Behälterpegel 141 in dem Laugenbehälter 105 abgesenkt wird, damit keine Luft aus der inaktiven Druckleitung 123, 139 angesaugt wird.In addition, a pressure sensor for detecting the pressure exerted on the
Um das Risiko des Luft-Ansaugens zu minimieren, sollten die Strömungsquerschnitte des Saugstutzens 113 und der Saugleitung 111 ausreichend groß dimensioniert werden, damit sich geringe Strömungsgeschwindigkeiten und damit geringe, saugseitige Druckverluste und somit ein geringerer Saugdruck einstellt, der das Ansaugen der Luft konstruktiv bedingt erschwert.In order to minimize the risk of air being sucked in, the flow cross-sections of the
Die Regulation der Pumpendrehzahl durch die Pumpenansteuerung 135 kann zusätzlich als selbstlernende Funktion in der Software implementiert werden oder durch ein Pumpenkennfeld aus den unterschiedlichen Betriebspunkten vorgegeben werden, welches in der Auslegungsphase ausgearbeitet wurde. Über verschiedene zuvor durchgeführte Waschzyklen kann die Drehzahlvorgabe für folgende Waschprozesse anhand der erzielten Pumpgradienten angepasst werden. Es wird erfasst, wenn sich die Randbedingungen verändert haben und bei veränderten Bedingungen Luft angesaugt wird. Somit können programmtechnische, vorprogrammierte Änderungen vorgenommen werden, um zum Beispiel auf lebensdauerbedingte Effekte reagieren zu können, wie zum Beispiel das Reduzieren der Strömungsquerschnitte über die Lebensdauer durch Ablagerungen, was höhere saugseitige Druckverluste erzeugt und das Ansaugen von Luft fördert. Somit müssen nicht alle möglichen Drehzahlprofile vor dem Gerätebau also in der Auslegungsphase erfolgen und zusätzlich kann z.B. die jeweiligen Aufstellbedingungen des Waschgerätes beim Kunden in der Drehzahlsteuerung mit berücksichtigt werden.The regulation of the pump speed by the
Die erfindungsgemäßen Maßnahmen stellen sicher, dass beim Abpumpen oder Umpumpen in der aktiven Druckleitung 123, 129 stets ein Förderstrom 137, 143 von Waschflüssigkeit aufgebaut wird, ohne dass dabei über die inaktive Druckleitung 123, 129 Luft angesaugt und dadurch der Förderstrom 137, 143 durch die zweiphasigen Anteile von Waschflüssigkeit und Luft reduziert wird. Damit werden zeitlich kurze Pumpenprogrammschritte ermöglicht, die sich positiv auf die Dauer von bestimmten Waschpflegeprogrammen auswirken. Beim Fördern von zweiphasigen Gemischen, also Gemischen aus Waschflüssigkeit und Luft, entsteht für die Pumpendrehzahlreglung eine anspruchsvolle Aufgabe. Kurzzeitiges Erhöhen oder Reduzieren der Drehzahl der Pumpe 115 beim Fördern von zweiphasigen Gemischen bedeutet eine erhöhte Bauteilbelastung, die es zu vermeiden gilt. Zusätzlich entstehen störende Betriebsgeräusche durch das Fördern eines Zweiphasengemischs, wenn Luft beim Fördern angesaugt wird. Besonders die kurze Periodendauer des alternierenden Luft-Ansaugens kann die subjektive Geräuschempfindung stark beeinträchtigen.The measures according to the invention ensure that when pumping out or pumping in the
Zusätzlich wäre es denkbar, weitere Verfahren zu entwickeln, die von einem gleichzeitigen Betrieb beider Antriebe in Umpumpsystemen profitieren würden, wie z.B. Fremdkörpererkennung- und Fremdkörperbeseitigung, sowie andere Verfahren zur Selbstreinigung.In addition, it would be conceivable to develop further methods that would benefit from the simultaneous operation of both drives in pumping systems, such as foreign body detection and removal, as well as other methods for self-cleaning.
Die erste Kurve 149 zeigt den Verlauf des Förderstroms 137 von Waschflüssigkeit in der ersten Druckleitung 123, oder Abpumpleitung, bei einem Ansaugen von Luft durch den inaktiven Druckstutzen 127 und durch die inaktive zweite Druckleitung 129. Wird die Pumpe 115 beispielsweise bei einem geringen Tankfüllstand betrieben, so wird bei hohen Förderströmen, die hohe Strömungsgeschwindigkeiten bei geringen Strömungsquerschnitten generieren, Luft aus der inaktiven zweiten Druckleitung 129, der Umpumpleitung, angesaugt, so dass der Förderstrom 137 der Pumpe 115 kurzzeitig zusammenbricht und sich dann wieder einstellt. In dem Kurvenverlauf der ersten Kurve 149 wird der pulsierende Förderstrom 137 der Waschflüssigkeit deutlich, wobei die Trägheit der Waschflüssigkeit dämpfend wirkt.The
Die zweite Kurve 151 zeigt den Verlauf des Förderstroms 137 von Waschflüssigkeit in der ersten Druckleitung 123, oder Abpumpleitung im Sinne der vorliegenden Erfindung, wenn keine Luft durch den inaktiven Druckstutzen 127 und durch die inaktive zweite Druckleitung 129 angesaugt wird. Aufgrund des in der inaktiven Druckleitung 129 vorhandenen maximalen Waschflüssigkeitspegels 139 kann die Pumpe 115, auch bei einem geringen Tankfüllstand betrieben werden, ohne das Luft aus der inaktiven zweiten Druckleitung 129, der Umpumpleitung, angesaugt wird. Wie in
Alle in Verbindung mit einzelnen Ausführungsformen der Erfindung erläuterten und gezeigten Merkmale können in unterschiedlicher Kombination in dem erfindungsgemäßen Gegenstand vorgesehen sein, um gleichzeitig deren vorteilhafte Wirkungen zu realisieren.All features explained and shown in connection with individual embodiments of the invention can be provided in different combinations in the subject matter according to the invention in order to simultaneously realize their advantageous effects.
Der Schutzbereich der vorliegenden Erfindung ist durch die Ansprüche gegeben und wird durch die in der Beschreibung erläuterten oder den Figuren gezeigten Merkmale nicht beschränkt.The scope of protection of the present invention is given by the claims and is not restricted by the features explained in the description or shown in the figures.
- 100100
- WäschepflegegerätLaundry care device
- 101101
- EinspülschaleDetergent bowl
- 103103
- Türdoor
- 105105
- LaugenbehälterSuds container
- 107107
- EinlassöffnungInlet opening
- 109109
- AblassöffnungDrain opening
- 111111
- SaugleitungSuction line
- 113113
- SaugstutzenSuction nozzle
- 115115
- Pumpepump
- 117117
- SaugkammerSuction chamber
- 119119
- Erste DruckkammerFirst pressure chamber
- 121121
- Erster DruckstutzenFirst pressure port
- 123123
- Erste DruckleitungFirst pressure line
- 125125
- Zweite DruckkammerSecond pressure chamber
- 127127
- Zweiter DruckstutzenSecond pressure port
- 129129
- Zweite DruckleitungSecond pressure line
- 131131
- Erster PumpenmotorFirst pump motor
- 133133
- Zweiter PumpenmotorSecond pump motor
- 135135
- PumpenansteuerungPump control
- 137137
- Erster FörderstromFirst flow
- 139139
- Maximaler WaschflüssigkeitspegelMaximum washing liquid level
- 141141
- BehälterpegelContainer level
- 143143
- Zweiter FörderstromSecond flow rate
- 145145
- OrdinatenachseOrdinate axis
- 147147
- AbszissenachseAbscissa axis
- 149149
- Erste KurveFirst turn
- 151151
- Zweite KurveSecond corner
- 200200
- Verfahren zum Pumpen von Waschflüssigkeit in einem WäschepflegegerätMethod for pumping washing liquid in a laundry care device
- 201201
- Aktivieren eines der beiden Pumpenmotoren in einem AktivierungszeitabschnittActivation of one of the two pump motors in an activation period
- 203203
- Aktivieren des anderen der beiden Pumpenmotoren in dem AktivierungszeitabschnittActivation of the other of the two pump motors in the activation period
Claims (15)
- Laundry treatment appliance (100) having a pump (115) for pumping washing liquid, wherein the pump (115) has a suction chamber (117) with a suction port (113) for fluidic connection to a suction line (111), a first pressure chamber (119) with a first pressure port (121) for fluidic connection to a first pressure line (123), and a second pressure chamber (125) with a second pressure port (127) for fluidic connection to a second pressure line (129), and wherein the pump (115) has a first pump motor (131) for pumping the washing liquid out of the first pressure chamber (119) through the first pressure line (123) with a first delivery rate (137) and a second pump motor (133) for pumping the washing liquid out of the second pressure chamber (125) through the second pressure line (129) with a second delivery rate (143), and a pump drive system (135) for controlling the first and second pump motor (131, 133), characterised in that the pump drive system (135) is designed to activate one of the two pump motors (131, 133) in an activation period in order to pump washing liquid out of the associated pressure chamber (119, 125) through the associated pressure line (123, 129) with the associated delivery rate (137, 143), and that
the pump drive system (135) is designed to activate the other of the two pump motors (131, 133) in the activation period in order to pump washing liquid out of the associated pressure chamber (119, 125) through the associated pressure line (123, 129) up to a maximum washing liquid level (139) in the associated pressure line (123, 129) in order to prevent air being sucked in through the associated pressure line (123, 129), and wherein further the pump drive system (135) is designed to control the speed of the first and second pump motor (131, 133). - Laundry treatment appliance (100) according to claim 1, characterised in that the laundry treatment appliance (100) has a tub (105) for receiving washing liquid, wherein the washing liquid in the tub (105) has a tub level (141), wherein the pump drive system (135) is designed to actuate the two pump motors (131, 133) such that the maximum washing liquid level (139) in the associated pressure line (123, 129) has a height which is at least as large as the height of the tub level (141) of the washing liquid in the tub (105).
- Laundry treatment appliance (100) according to one of the preceding claims, characterised in that the laundry treatment appliance (100) has a tub (105) for receiving washing liquid and a pressure sensor for detecting the pressure exerted by the washing liquid on the tub (105), that the tub (105) is fluidically connected to the suction line (111), and that the pump drive system (135) is designed to control a speed of the pump motors (131, 133) as a function of the detected pressure in order to prevent air being sucked in through the associated pressure line (123, 129).
- Laundry treatment appliance (100) according to claim 3, characterised in that the pump drive system (135) is designed to reduce the speed of the pump motors (131, 133) when the detected pressure falls below a predetermined pressure threshold value.
- Laundry treatment appliance (100) according to one of the preceding claims, characterised in that the pump drive system (135) is designed to activate the first pump motor (131) in the activation period in order to drain washing liquid out of the first pressure chamber (119) through the first pressure line (123) with the first delivery rate (137), and that the pump drive system (135) is designed to activate the second pump motor (133) in the activation period in order to pump washing liquid out of the second pressure chamber (125) up to the maximum washing liquid level (139) in the second pressure line (129).
- Laundry treatment appliance (100) according to claim 5, characterised in that the first pressure chamber (119) comprises a drainage pressure chamber, that the first pressure port (121) comprises a drainage pressure port, and that the first pressure line (123) comprises a drainage line, wherein the pump drive system (135) is designed to actuate the first pump motor (131) such that in the activation period washing liquid can be pumped out of the drainage pressure chamber through the drainage line with a drainage delivery rate from the laundry treatment appliance (100).
- Laundry treatment appliance (100) according to one of the preceding claims, characterised in that the pump drive system (135) is designed to activate the second pump motor (133) in a further activation period in order to pump washing liquid out of the second pressure chamber (125) through the second pressure line (129) with the second delivery rate (143), and that the pump drive system (135) is designed to activate the first pump motor (131) in the further activation period in order to pump washing liquid out of the first pressure chamber (119) up to a maximum washing liquid level (139) in the first pressure line (123).
- Laundry treatment appliance (100) according to claim 7, characterised in that the second pressure chamber (125) comprises a recirculation pressure chamber, that the second pressure port (127) comprises a recirculation pressure port, and that the second pressure line (129) comprises a recirculation line, wherein the second pump motor (133) is designed to recirculate washing liquid in the further activation period out of the recirculation pressure chamber through the recirculation line with a recirculation delivery rate in the laundry treatment appliance (100).
- Laundry treatment appliance (100) according to claim 8, characterised in that the laundry treatment appliance (100) has a tub (105), that the suction line (111) and the recirculation line are each fluidically connected to the tub (105), and wherein the second pump motor (133) is designed to drain washing liquid out of the tub (105) through the suction line (111), and to pump the drained washing liquid back into the tub (105) through the recirculation line with a recirculation delivery rate.
- Laundry treatment appliance (100) according to one of the preceding claims, characterised in that the suction port (113) has a first port diameter, that the first pressure port (121) has a second port diameter, and that the second pressure port (127) has a third port diameter, wherein the first port diameter is larger than the second port diameter or third port diameter.
- Laundry treatment appliance (100) according to one of the preceding claims, characterised in that the suction line (111) has a first line diameter, that the first pressure line (123) has a second line diameter, and that the second pressure line (129) has a third line diameter, wherein the first line diameter is larger than the second line diameter or third line diameter.
- Laundry care appliance (100) according to one of the preceding claims, characterised in that the first and second pump motors (131, 133) each have a first and a second impeller, wherein the first pump motor (131) is designed to drive the first impeller in a direction of rotation in order to pump washing liquid out of the first pressure chamber (119), and wherein the second pump motor (133) is designed to drive the second impeller in a direction of rotation in order to pump washing liquid out of the second pressure chamber (125).
- Laundry treatment appliance (100) according to one of the preceding claims, characterised in that the first or second pump motor (131, 133) comprises an electric motor, in particular a brushless direct current motor embodied as a BLDC motor or a permanently excited, brushless synchronous drive.
- Laundry treatment appliance (100) according to one of the preceding claims, characterised in that the laundry treatment appliance (100) has a power detection element for detecting an electrical power value of the first or second pump motor (131, 133), that the pump drive system (135) is designed to determine a delivery pressure and/or delivery rate of the washing liquid in the first or second pressure line (123, 129) as a function of the detected power value, and that the pump drive system (135) is designed to change a speed of the first or second pump motor (131, 133) as a function of the determined delivery pressure and/or delivery rate.
- Method (200) for pumping washing liquid in a laundry treatment appliance (100) with a pump (115) for pumping washing liquid, wherein the pump (115) has a suction chamber (117) with a suction port (113) for fluidic connection to a suction line (111), a first pressure chamber (119) with a first pressure port (121) for fluidic connection to a first pressure line (123), and a second pressure chamber (125) with a second pressure port (127) for fluidic connection to a second pressure line (129), and wherein the pump (115) has a first pump motor (131) for pumping the washing liquid out of the first pressure chamber (119) through the first pressure line (123) with a first delivery rate (137) and a second pump motor (133) for draining washing liquid out of the second pressure chamber (125) through the second pressure line (129) with a second delivery rate (143), and a pump drive system (135) for controlling the first and second pump motor (131, 133), characterised in that the method (200)
comprises the activation (201) of one of the two pump motors (131, 133) in an activation period by the pump drive system (135) in order to pump washing liquid out of the associated pressure chamber (119, 125) through the associated pressure line (123, 129) with the associated delivery rate (137, 143), and
comprises the activation (203) of the other of the two pump motors (131, 133) in the activation period by the pump drive system (135) in order to pump washing liquid out of the associated pressure chamber (119, 125) through the associated pressure line (123, 129) up to a maximum washing liquid level (139) in the associated pressure line (123, 129) in order to prevent air being sucked in through the associated pressure line (123, 129), and wherein further the pump drive system (135) is designed to control the speed of the first and second pump motor (131, 133).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL16822696T PL3411520T3 (en) | 2016-02-01 | 2016-12-29 | Laundry treatment appliance comprising a pump drive system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016201446.3A DE102016201446B3 (en) | 2016-02-01 | 2016-02-01 | Laundry care device with a pump control |
PCT/EP2016/082802 WO2017133825A1 (en) | 2016-02-01 | 2016-12-29 | Laundry treatment appliance comprising a pump drive system |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3411520A1 EP3411520A1 (en) | 2018-12-12 |
EP3411520B1 true EP3411520B1 (en) | 2021-03-17 |
Family
ID=57749941
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16822696.7A Active EP3411520B1 (en) | 2016-02-01 | 2016-12-29 | Laundry treatment appliance comprising a pump drive system |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP3411520B1 (en) |
CN (1) | CN108603323B (en) |
DE (1) | DE102016201446B3 (en) |
PL (1) | PL3411520T3 (en) |
WO (1) | WO2017133825A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102554903B1 (en) | 2018-04-03 | 2023-07-11 | 엘지전자 주식회사 | Washing Machine |
DE102019207351A1 (en) * | 2019-05-20 | 2020-11-26 | BSH Hausgeräte GmbH | Laundry care device with one control |
DE102019209149A1 (en) * | 2019-06-25 | 2020-12-31 | BSH Hausgeräte GmbH | Laundry care device with a pumping device and a method for operating the laundry care device |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3542594A (en) * | 1968-06-19 | 1970-11-24 | Maytag Co | Fluid control system |
DE3825502A1 (en) * | 1988-07-27 | 1990-02-01 | Licentia Gmbh | Method and device for controlling the lye pumping-off operation in washing machines |
DE19907074A1 (en) * | 1999-02-19 | 2000-08-24 | Bsh Bosch Siemens Hausgeraete | Water-bearing household appliance, in particular household dishwasher |
CN1536156A (en) * | 2003-04-11 | 2004-10-13 | 乐金电子(天津)电器有限公司 | Cylinder washing machine |
JP2008000196A (en) * | 2006-06-20 | 2008-01-10 | Toshiba Corp | Washing machine |
EP2009165A1 (en) * | 2007-06-28 | 2008-12-31 | Bonferraro S.p.A. | Operating cycle for the drain pump of a household washing appliance |
EP2138625B1 (en) * | 2008-06-24 | 2010-09-22 | Candy S.p.A. | Apparatus for circulating flows of washing and rinsing liquids in a laundry washing machine |
DE102009002224B4 (en) * | 2009-04-06 | 2012-09-06 | BSH Bosch und Siemens Hausgeräte GmbH | Water-conducting household appliance, in particular dishwasher |
US8793828B2 (en) * | 2010-04-13 | 2014-08-05 | Whirlpool Corporation | Laundry treating appliance with automatic pump shutoff |
BRPI1001488A2 (en) * | 2010-05-26 | 2012-02-28 | Electrolux Do Brasil S.A. | self-cleaning filter improvement for washing machines |
CN104514113A (en) * | 2013-09-27 | 2015-04-15 | 海尔集团技术研发中心 | Washing machine and clothes washing control method thereof |
-
2016
- 2016-02-01 DE DE102016201446.3A patent/DE102016201446B3/en not_active Expired - Fee Related
- 2016-12-29 WO PCT/EP2016/082802 patent/WO2017133825A1/en active Application Filing
- 2016-12-29 PL PL16822696T patent/PL3411520T3/en unknown
- 2016-12-29 EP EP16822696.7A patent/EP3411520B1/en active Active
- 2016-12-29 CN CN201680080694.1A patent/CN108603323B/en active Active
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
DE102016201446B3 (en) | 2017-02-09 |
CN108603323A (en) | 2018-09-28 |
WO2017133825A1 (en) | 2017-08-10 |
CN108603323B (en) | 2020-08-04 |
EP3411520A1 (en) | 2018-12-12 |
PL3411520T3 (en) | 2021-10-11 |
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