CN118326673A - Clothes care equipment with control device - Google Patents
Clothes care equipment with control device Download PDFInfo
- Publication number
- CN118326673A CN118326673A CN202410029564.1A CN202410029564A CN118326673A CN 118326673 A CN118326673 A CN 118326673A CN 202410029564 A CN202410029564 A CN 202410029564A CN 118326673 A CN118326673 A CN 118326673A
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- China
- Prior art keywords
- lye container
- pump
- water level
- laundry care
- during
- 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
- 238000001514 detection method Methods 0.000 claims abstract description 132
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 104
- 239000006260 foam Substances 0.000 claims abstract description 71
- 238000005086 pumping Methods 0.000 claims abstract description 50
- 238000000034 method Methods 0.000 claims abstract description 40
- 125000004122 cyclic group Chemical group 0.000 claims abstract description 14
- 238000005516 engineering process Methods 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 61
- 238000005406 washing Methods 0.000 claims description 57
- 239000013505 freshwater Substances 0.000 claims description 28
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000012670 alkaline solution Substances 0.000 claims description 4
- 239000000243 solution Substances 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 14
- 230000015572 biosynthetic process Effects 0.000 description 12
- 239000000126 substance Substances 0.000 description 4
- 230000003213 activating effect Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 230000004913 activation Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- 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
-
- 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
- D06F39/06—Arrangements for preventing or destroying scum
-
- 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
- D06F2103/18—Washing liquid level
-
- 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
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/02—Water supply
-
- 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
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/06—Recirculation of washing liquids, e.g. by pumps or diverting valves
-
- 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
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/08—Draining of washing liquids
-
- 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
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/46—Drum speed; Actuation of motors, e.g. starting or interrupting
- D06F2105/48—Drum speed
-
- 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
-
- 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
- D06F39/087—Water level measuring or regulating devices
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Control Of Washing Machine And Dryer (AREA)
- Detail Structures Of Washing Machines And Dryers (AREA)
Abstract
The present invention relates to a laundry care device (100), comprising: a lye container (105); a laundry tub (107); a pump (117); a power detection element (131); a water level detection element (129); and a control device (119) which is connected to the pump, the power detection element and the water level detection element in a control technology. The control device is configured to activate the pump within the framework of a cyclic pumping process during a detection period (143); and the control means is configured to determine that foam is present in the lye container if during the detection period the electrical power parameter of the pump detected by the power detection element is smaller than a power parameter threshold value and if during the detection period the water level in the lye container detected by the water level detection element is larger than a water level threshold value (144).
Description
Technical Field
The present invention relates to a laundry care appliance having a control device.
Background
In conventional laundry care appliances, when the laundry tub rotates at a high speed and/or laundry care substances may be excessive, in some cases strong foam formation may occur in the lye container of the laundry care appliance. In some cases, the corresponding intense foam formation can lead to foam penetration from the lye container into the washing box of the laundry care appliance and to overflow of washing liquid from the washing box of the laundry care appliance, thereby soiling the installation area of the laundry care appliance. In some cases, the corresponding strong foam formation can also negatively affect the laundry care effect of the laundry care process of the laundry care device.
The laundry care appliance suds recognition strategies known in the prior art are generally aimed at recognizing the formation of suds in the laundry care appliance at a later stage of the laundry care process of the laundry care appliance by observing the washing parameters over a longer period of time. The foam recognition strategies disclosed by the prior art generally fail to recognize the rapid occurrence of foam formation during laundry care.
Disclosure of Invention
The object of the present invention is to provide a laundry care appliance in which it is possible to quickly determine during a laundry care session whether foam is present in an alkaline container of the laundry care appliance.
The task is solved by a subject matter having the features described in the preferred embodiments. Advantageous embodiments are the subject matter of alternative embodiments, the description and the figures.
According to a first aspect, the object of the invention is solved by a laundry care device comprising: an alkaline solution container for receiving a washing solution; a laundry tub for receiving laundry, wherein the laundry tub is arranged in the lye container, wherein the lye container has a drain and a supply element, which are fluidically connected by a circulation pumping line; a pump configured to pump wash liquid from the lye container through the discharge port within the framework of a cyclic pumping process and to pump the pumped wash liquid back to the lye container through the cyclic pumping line and through the supply element; a power detection element for detecting an electric power parameter of the pump; a water level detecting element for detecting a water level in the lye container; and a control device in control connection with the pump, the power detection element and the water level detection element, wherein the control device is configured to activate the pump within the framework of a cyclic pumping process during a detection period, wherein the control device is configured to determine that foam is present in the lye container if an electrical power parameter of the pump detected by the power detection element during the detection period is less than a power parameter threshold and if a water level of the lye container detected by the water level detection element during the detection period is greater than a water level threshold.
In particular, the water level detection element is configured as a pressure detection element for detecting a pressure in the lye container, and the control device is configured to determine that foam is present in the lye container if during the detection period an electrical power parameter of the pump detected by the power detection element is smaller than a power parameter threshold and during the detection period the pressure detected by the pressure detection element in the lye container is larger than a pressure threshold.
The technical advantage achieved thereby is that it is possible to reliably and quickly determine whether foam is present in the laundry care appliance during the detection period by detecting and analyzing only two parameters, including the electrical power parameter of the pump and the water level, in particular the pressure, in the lye container.
The water level, in particular the pressure, in the lye container, detected by the water level detection element, in particular the pressure detection element, increases with increasing amount of washing liquid in the lye container. However, even if there is foam formation in the lye container, the water level, in particular the pressure, in the lye container, which is detected by the water level detection element, in particular the pressure detection element, will rise.
The control device therefore cannot distinguish between the presence of foam formation in the lye container or merely the presence of a rise in the level of the wash liquor in the lye container, simply on the basis of the water level, in particular the pressure, in the lye container detected by the water level detection element exceeding a water level threshold, in particular a pressure threshold.
In order for the control device to be able to determine the water level, in particular the pressure, in the lye container detected by the water level detection element, in particular the pressure detection element, not due to the presence of foam in the lye container but to an increase in the level of the washing liquid in the lye container, the control device also takes into account the electrical power parameter of the pump detected by the power detection element.
In particular, the electrical power parameter of the pump detected by the power detection element comprises a motor current of the pump.
If the electrical power parameter of the pump, in particular the motor current, increases, it can be inferred by the control device that the pump is pumping washing liquid, so that the power consumption of the pump is high.
If the electrical power parameter of the pump detected by the power detection element is below a predetermined power parameter threshold, this is an indication that the power consumption of the pump is low, which is related to an idle operation of the pump (i.e. pumping air).
Thus, if the electrical power parameter of the pump is below a predetermined power parameter threshold, the pump will not pump washing liquid through the circulation pumping line, and thus no washing liquid is present in the lye container. However, if at the same time the water level, in particular the pressure, in the lye container detected by the water level detection element, in particular the pressure detection element, is higher than a water level threshold, in particular a pressure threshold, the detected water level, in particular the pressure, may be based entirely on the presence of foam in the lye container.
Thereby, the foam in the lye container can be effectively identified, so that the foam formation can be detected very quickly, so that appropriate countermeasures can be taken quickly by the control means of the laundry care appliance to reduce the foam formation.
A laundry care appliance is understood to mean an appliance for laundry care, such as a washing machine or a laundry dryer, in particular a laundry dryer having washing and drying functions. In particular, such laundry care apparatuses are understood to be household laundry care apparatuses. I.e. laundry care appliances used within the framework of home management, with which laundry is handled in a normal number of households.
In an advantageous embodiment, the control device is configured to determine that foam is present in the lye container if during the detection period the electrical power parameter of the pump detected by the power detection element is smaller than a power parameter threshold value for a minimum duration, in particular for a minimum duration of at least 5 seconds.
The technical advantage achieved thereby is that detection of the electrical power parameter of the pump for a minimum duration ensures that the idle operation of the pump is reliably detected for foam recognition, so that short-term fluctuations in the electrical power parameter do not lead to false positive results.
In an advantageous embodiment, the electrical power parameter of the pump detected by the power detection element comprises a motor current of the pump.
The technical advantage achieved thereby is that by analysing the motor current of the pump, the control device can effectively distinguish whether the pump is delivering washing liquid or is delivering air only within the frame of idle operation.
In an advantageous embodiment, the control device is configured to determine that no foam is present in the lye container if during the detection period the electrical power parameter of the pump detected by the power detection element is greater than a power parameter threshold value and/or if during the detection period the water level detected by the water level detection element in the lye container is less than a water level threshold value.
The technical advantage achieved thereby is that foam development in the laundry care appliance can be effectively excluded. Each of these two criteria may itself or a combination of these two criteria exclude the presence of foam in the lye container.
If the pump electrical power parameter is detected to be greater than the power parameter threshold, it is indicated that the pump is pumping wash liquor.
If the water level detection element detects that the water level in the lye container is lower than the water level threshold value, the lye container is free of washing liquid and foam.
In an advantageous embodiment, the laundry care appliance has a fresh water supply device which is fluidically connected to the lye container and is connected to the control device in a control manner, and the control device is configured to activate the fresh water supply device for supplying fresh water to the lye container during a supply period which occurs before the detection period.
The technical advantage achieved thereby is that only after the fresh water has been supplied, there may be a corresponding flushing of laundry care substances from the washing tub, and there is a significant risk of foam formation in the lye container.
In an advantageous embodiment, the control device is configured to activate the pump within the framework of a cyclical pumping process during the supply period.
The technical advantage achieved thereby is that the washing liquid fed during the supply period can be ensured to effectively wet the laundry by the circulation pump.
In an advantageous embodiment, the control device is configured to activate the pump within the framework of a circulation pumping process during a circulation pumping period following the detection period.
The technical advantage achieved thereby is that effective laundry care is ensured by circulating the pumped washing liquid after the detection period.
In an advantageous embodiment, the water level detection element comprises a stand pipe arranged in sections in the lye container, wherein a water level sensor for detecting the water level in the stand pipe is arranged at an end of the stand pipe facing away from the lye container for detecting the water level in the lye container.
The technical advantage achieved thereby is that the water level in the lye container can be detected effectively.
In particular, the stand pipe has an end facing the lye container, for example, at which the washing liquid can penetrate into the stand pipe when the level of the washing liquid in the lye container rises, and compresses an air column located above in the stand pipe, so that a water level sensor arranged at the end of the stand pipe facing away from the lye container can detect a corresponding compression of the air column as a rise in water level and correlate it with the rise of the washing liquid in the lye container or the generation of foam in the lye container.
In an advantageous embodiment, the riser is designed as a siphon, which comprises a curved section that can be filled with washing liquid and a vertically extending riser section that can be filled with air, in which riser section the water level sensor is arranged.
The technical advantage achieved thereby is that the curved section of the riser designed as a siphon ensures that a stable column of washing liquid is maintained in the riser for effective water level measurement.
In an advantageous embodiment, the stand pipe has a stand pipe opening at the end facing the lye container, which stand pipe opening is fluidically connected to the interior of the lye container, so that washing liquid and/or foam can penetrate into the stand pipe from the interior of the lye container, wherein the stand pipe is in particular installed in the lye container such that during the detection period the washing liquid level in the lye container is arranged below the stand pipe opening.
The technical advantage achieved thereby is that the riser opening allows the washing liquid and/or foam to penetrate the riser, thereby enabling water level measurement. If during the detection period the level of the washing liquid is below the riser opening of the riser, the water level signal detected by the control means during the detection is the result of foam penetrating the riser.
In an advantageous embodiment, the laundry care appliance has a tub drive for rotating the laundry tub, wherein the tub drive is connected to the control device in terms of control technology, wherein the control device is in particular configured to activate the tub drive during the detection period, during the supply period and/or during the circulation pumping period in order to rotate the laundry tub at a constant rotational speed.
The technical advantage achieved thereby is that by rotation of the laundry tub, effective wetting of the laundry in the laundry tub is ensured, thereby achieving laundry care.
In an advantageous embodiment, the control means are configured to activate the drum drive means during a varying period of time which is linked to said detection period of time after determining the presence of foam in the lye container, to rotate the laundry drum at a reduced rotational speed, to reduce the amount of foam present in the lye container.
The technical advantage achieved thereby is that by the rotation of the laundry drum at a reduced rotational speed, it is ensured that foam no longer escapes upwards, whereby the amount of foam present in the lye container can be effectively reduced.
In an advantageous embodiment, the control means are configured to activate the fresh water supply means of the laundry care appliance for supplying fresh water to the lye container during a further variation period linked to said detection period after determining the presence of foam in the lye container.
The technical advantage achieved thereby is that the foam quantity in the lye container can be effectively reduced by the supply of fresh water, in particular cold fresh water.
In an advantageous embodiment, the control means is configured to deactivate the heating means of the laundry care appliance for heating the washing liquid in the lye container during a further variation period of time which is linked to said detection period of time after determining that foam is present in the lye container, and/or the control means is configured to activate the pumping means of the laundry care appliance for pumping the washing liquid out of the lye container during a further variation period of time which is linked to said detection period of time after determining that foam is present in the lye container.
The technical advantage achieved thereby is that lowering the temperature of the washing liquid in the lye container counteracts the formation of foam or reduces the amount of foam. By pumping out the washing liquid in the lye container, the foam present in the lye container can also be pumped out effectively together.
According to a second aspect, the task is solved by a method for detecting foam in a laundry care device, wherein the laundry care device comprises: an alkaline solution container for receiving a washing solution; a laundry tub for receiving laundry, wherein the laundry tub is arranged in the lye container, wherein the lye container has a drain and a supply element, which are fluidically connected by a circulation pumping line; a pump configured to pump wash liquid from the lye container through the discharge port within the framework of a cyclic pumping process and to pump the pumped wash liquid back to the lye container through the cyclic pumping line and through the supply element; a power detection element for detecting an electric power parameter of the pump; a water level detecting element for detecting a water level in the lye container; and a control device which is connected to the pump, the power detection element and the water level detection element in a control technology, wherein the method comprises the following method steps: activating, by the control device, the pump within the framework of a cyclic pumping process during a detection period; and determining, by the control means, that there is foam in the lye container if during the detection period the electrical power parameter of the pump detected by the power detection element is smaller than a power parameter threshold value and if during the detection period the water level in the lye container detected by the water level detection element is larger than a water level threshold value.
The technical advantage achieved thereby is that an effective detection of foam is ensured.
Advantageous embodiments of the laundry care device according to the first aspect are also advantageous embodiments of the method according to the second aspect.
Drawings
Embodiments of the present invention are illustrated in the accompanying drawings and described in detail below.
In the accompanying drawings:
FIG. 1 shows a schematic view of a laundry care apparatus according to one embodiment;
Fig. 2 shows a schematic view of a laundry care appliance with a control device according to one embodiment;
Fig. 3 shows a diagram of a laundry care process according to a first embodiment;
fig. 4 shows a diagram of a laundry care process according to a second embodiment;
FIG. 5 shows a schematic view of a water level detection element in an lye container of a laundry care appliance according to one embodiment; and
Fig. 6 illustrates a schematic diagram of a method of care of clothing in a laundry care appliance, according to one embodiment.
Detailed Description
Fig. 1 illustrates a schematic view of a general laundry care apparatus 100, such as a washing machine, according to one embodiment. The laundry care appliance 100 comprises a washing box 101 in which a detergent or other liquid laundry care substance can be loaded. The laundry care apparatus 100 has an apparatus housing 102 with an apparatus opening 104 which can be closed by an apparatus door 103 for loading the laundry care apparatus 100. Furthermore, the laundry care apparatus 100 has an operating element 106 for operating the laundry care apparatus 100.
Fig. 2 shows a schematic view of a laundry care appliance with a control device according to one embodiment.
The laundry care appliance 100 has an alkaline liquor container 105 for receiving a washing liquid and a laundry tub 107 for receiving laundry. Here, the laundry tub 107 is arranged in the lye container 105. The drum driving device 109 rotates the laundry drum 107. The lye container 105 has a discharge opening 111. The laundry care apparatus 100 has a supply element 113. The discharge opening 111 is fluidically connected to the supply element 113 via a circulation pump line 115, wherein a pump 117 for pumping the washing liquid via the circulation pump line 115 is arranged in the circulation pump line 115.
The pump 117 may pump the washing liquid from the lye container 105 into the circulation pumping line 115 through the drain 111 during a circulation pumping process not shown in fig. 2, and may re-supply the washing liquid to the lye container 105 and the laundry tub 107 through the circulation pumping line 115 and through the supply element 113. Accordingly, during the laundry care process, the washing liquid may be effectively circulated and pumped through the circulation pumping line 115 and re-supplied to the laundry in the laundry tub 107.
In particular, the laundry care apparatus 100 comprises fresh water supply means 118-1 which supply fresh water through a fresh water line 118-2 to the lye container 105 or to laundry received in the laundry tub 107 via a washing tub 101 of the laundry care apparatus 100, which is not shown in fig. 2, and/or a fresh water connection of the laundry care apparatus 100, which is not shown in fig. 2.
The laundry care appliance 100 further comprises a control device 119 which is connected via a first control connection 121 to the pump 117, via a second control connection 123 to the tub drive 109 for rotating the laundry tub 107, and via a third control connection 125 to a fresh water supply 118-1 for supplying washing liquid into the laundry tub 107.
The control device 119 is also connected in control with a water level detection element 129 for detecting the water level in the lye container 105 via a fourth control connection 127. The water level detection element 129 for detecting the water level in the lye container 105 described in the present embodiment is here configured as a pressure detection element 129 for detecting the pressure in the lye container 105.
The control device 119 is also connected to a power detection element 131, which is only schematically shown in fig. 2, for detecting a power parameter of the pump 117, in particular a motor current.
The laundry care apparatus 100 further comprises an outlet line 133, which is fluidly connected to the circulation pumping line 115. The pumping-out device 135, which is only schematically shown in fig. 2, is configured for pumping out washing liquid from the lye container 105 through the discharge opening 111 and from the laundry care appliance 100 through the circulation pumping line 115 and the outlet line 133 during a pumping-out process, which is not shown in fig. 2.
Fig. 3 shows a diagram of a laundry care process according to a first embodiment.
The first curve 140-1, the second curve 140-2, the third curve 140-3 and the fourth curve 140-4 shown in fig. 3 show the rotational speed (in revolutions per minute) of the laundry-care appliance 100's laundry tub 107 along the ordinate axis 137 in the diagram (a), the fresh water quantity (in liters) supplied to the lye container 105 by the fresh water supply device 118-1 of the laundry-care appliance 100 in the diagram (b), the water level in the lye container 105 detected by the water level detecting element 129 or by the pressure detecting element, or the pressure (in pascals) in the diagram (c), and the motor current of the pump 117 detected by the power detecting element 131 in the diagram (d), respectively, as a function of time, which is indicated along the abscissa axis 139 in the diagrams (a), (b), (c) and (d).
In the laundry care course shown in fig. 3, the time period shown in all of the illustrations (a), (b), (c) and (d) along the abscissa 139 of the laundry care course includes a region from about 490 seconds to about 570 seconds of the laundry care course.
The laundry care course shown in fig. 3 starts with a supply period 141 during which the control means 119 are designed to activate the fresh water supply means 118-1 of the laundry care appliance 100 in order to supply fresh water into the lye container 105, as can be taken from illustration (b).
Here, it can also be seen from illustration (c) that during the supply period 141, the fresh water supplied to the lye container 105 will also raise the water level in the lye container 105, which is detected by the water level detection element 129.
Following the supply period 141 is a detection period 143, wherein at the beginning of the detection period 143 the control means 119 activates the pump 117 within the framework of a circulation pumping process in order to circulate pumped washing liquid through the circulation pumping line 115 of the laundry care appliance 100. The activation of the pump 117 by the control means 119 at the beginning of the detection period 143 results in the fresh water supplied to the lye container 105 being pumped in full circulation, which can be deduced from the significant increase in the motor current through the detected pump 117 in the diagram (d) of fig. 3.
After a fluctuation of the detected motor current of the pump 117, which is shown in fig. 3 (d), the motor current of the pump 117 stabilizes at a constant level during the further course of the detection period 143, which is below the power parameter threshold 145, so that an inference can be made that the pump 117 is in idle operation. In the idle operation of the pump 117, the pump 117 circulates pumped not washing liquid but air, which is characterized by an extremely low motor current of the pump 117. Thus, by corresponding idle operation of the pump 117, it can be identified: the washing liquid has been completely absorbed by the laundry present in the laundry tub 107.
Thus, the possibility of free, i.e. unadsorbed wash liquid still being present in the lye container 105 is precluded by detecting an idle operation of the pump 117 during the detection period 143.
However, it can be derived from the illustration (c) of fig. 3 that the water level detection element 129 is also able to detect that the water level in the lye container 105 is above the water level threshold 144 (in this case zero) during said detection period 143 and during the idle operation of said pump 117. The water level threshold 144 may also be set greater than zero, for example, to compensate for tolerances. The water level threshold 144 is preferably set to: if the detected water level is less than or equal to the water level threshold 144, this indicates that no wash liquid is present in the lye container 105.
Since the possibility of the presence of washing liquid in the lye container 105 has been excluded by the detected idle running of the pump 117, the detected water level in the lye container 105 in the detection period 143 is in this case based on the presence of foam in the lye container 105, resulting in a corresponding detected water level value in the lye container 105, whereby the control means 119 can directly and rapidly detect the presence of foam in the lye container 105 after activating said pump 117.
The detection period 143 is followed by a circulation pumping period 147 during which the pump 117 continues to operate in idle mode.
As can be taken from the illustrations (a), (b), (c) and (d) of fig. 3, the control means 119 activates the tub driving means during the supply period 141, during the detection period 143 and during the circulation pumping period 147 to rotate the laundry tub 107 at a constant rotational speed.
The generation of the water level value detected during the detection period 143 is based on the fact that the water level detection element 129 comprises, inter alia, a riser, which is designed as a siphon (or trap), which comprises a curved section that can be filled with washing liquid and comprises a vertically extending riser section that can be filled with air.
As a result of the rotation of the laundry tub 107, for example in the case of a corresponding excess of laundry care substance, a corresponding foam will be generated in the lye container 105 and the generated foam will penetrate into the stand pipe of the water level detection element 129 and a corresponding water level value will be generated which will only slowly drop during said circulation pumping period 147, which can be derived from the illustration (c) of fig. 3. Accordingly, the foam generated in the lye container 105 can only slowly flow out again after the liquid level in the lye container 105 has fallen.
The invention thus makes it possible to recognize the occurrence of foam in the lye container 105 very rapidly immediately after the pump 117 has been activated, so that impermissibly strong foam formation can be prevented rapidly.
For example, the amount of foam present in the lye container 105 may be reduced by rotating the laundry tub 107 at a reduced rotational speed to ensure that the foam is reduced accordingly after it is detected.
Alternatively or additionally, it is also possible to activate the fresh water supply 118-1 of the laundry care appliance 100 for supplying fresh water into the lye container 105 and/or to deactivate the heating means of the laundry care appliance 100 for heating the washing liquid in the lye container 105 and/or to activate the pump-out means 135 of the laundry care appliance 100 for pumping out the washing liquid from the lye container 105 in order to take effective foam control measures.
Fig. 4 shows a diagram of a laundry care process according to a second embodiment.
The subject of the embodiment shown in fig. 4 differs from the embodiment shown in fig. 3 in that in the embodiment shown in fig. 4 no foam is present in the lye container 105.
This can be detected by the control device 119 in such a way that during the detection period 143 the water level value shown in the diagram (c) does not exceed, or only to a very small extent exceeds, the water level threshold 144 during the corresponding idling operation of the pump 117 shown in the diagram (d).
Fig. 5 shows a schematic view of a water level detection element in an lye container of a laundry care appliance according to an embodiment.
In fig. 5 only a part of the lye container 105 of the laundry care apparatus 100 with the level 149 of the washing liquid is schematically shown.
The water level detection element 129 comprises a riser 151 schematically shown in fig. 5.
The stand pipe 151, which is only schematically shown in fig. 5 and is designed as a siphon (Siphon), has a stand pipe opening 155 at the end 153 facing the lye container 105, which stand pipe opening is fluidically connected to the lye container 105.
When the wash liquid level 149 rises, the wash liquid permeates into the inside of the stand pipe 151 through the stand pipe opening 155 and compresses air located in a vertical section of the stand pipe 151, not shown in fig. 5, so that a water level sensor of the stand pipe 151, not shown in fig. 5, can detect the rise in water level.
However, in the case of the measurement during the detection period 143 shown in fig. 5, the wash liquid level 149 is significantly lower than the standpipe opening 155, so that the detected rise in the water level in the standpipe 151 during the detection period 143 is not caused by the penetration of wash liquid into the standpipe 151, but rather by the acceleration of foam through the rotating laundry tub 107 and penetration through the standpipe opening 155.
Thus, by means of said water level detection element 129, which comprises a schematically shown stand pipe 151, it is possible to detect not only the level of wash liquid in the lye container 105, but also the presence of foam in the lye container 105.
Fig. 6 shows a schematic diagram of a method for detecting foam in a laundry care device according to one embodiment.
The method 200 comprises, as a first method step, the activation 201 of the pump 117 by the control device 119 during the detection period 143 in the context of a cyclical pumping process.
The method 200 comprises, as a second method step, determining 203 by the control means 119 that foam is present in the lye container 105 if the electrical power parameter of the pump 117 detected by the power detection element 131 during the detection period 143 is smaller than the power parameter threshold 145 and if the water level in the lye container 105 detected by the water level detection element 129 during the detection period 143 is larger than the water level threshold 144.
All the features described and illustrated in connection with the various embodiments of the invention can be arranged in different combinations in the subject matter of the invention to achieve their advantageous effects at the same time.
The scope of the invention is indicated by the claims and is not limited by the features set forth in the description or shown in the drawings.
List of reference numerals:
100. clothes care equipment
101. Washing box
102. Equipment shell
103. Equipment door
104. Device opening
105. Alkali liquor container
106. Operating element
107. Clothes barrel
109. Barrel driving device
111. Discharge port
113. Supply element
115. Circulation pumping pipeline
117. Pump with a pump body
118-1 Fresh water supply device
118-2 Fresh water pipeline
119. Control device
121. First control connection
123. Second control connection
125. Third control connection
127. Fourth control connection
129. Water level detecting element
131. Power detection element
133. Discharge line
135. Pump-out device
137. Ordinate axis
139. Axis of abscissa
140-1 First curve
140-2 Second curve
140-3 Third line
140-4 Fourth curve
141. Supply time period
143. Detection time period
144. Threshold of water level
145. Power parameter threshold
147. Cycle pumping time period
149. Liquid level
151. Vertical pipe
153. The end of the stand pipe facing the lye container
155. Riser opening
200. Method for detecting foam in a laundry care appliance
201. The first method step: activating the pump by the control device
203. The second method step: and determining whether foam exists in the lye container by a control device.
Claims (15)
1. A laundry care device (100), comprising: an alkaline solution container (105) for receiving a washing solution; -a laundry tub (107) for receiving laundry (129), wherein the laundry tub (107) is arranged in the lye container (105), wherein the lye container (105) has a drain (111) and a supply element (113), which are fluidly connected by a circulation pumping line (115); -a pump (117) configured to pump wash liquid out of the lye container (105) through the discharge opening (111) within the framework of a cyclic pumping process and to pump the pumped wash liquid back into the lye container (105) through the cyclic pumping line (115) and through the supply element (113); a power detection element (131) for detecting an electric power parameter of the pump (117); a water level detection element (129) for detecting a water level in the lye container (105); and a control device (119) which is connected to the pump (117), the power detection element (131) and the water level detection element (129) in a control manner, characterized in that,
-The control device (119) is configured to activate the pump (117) within the framework of a cyclic pumping process during a detection period (143); and
The control device (119) is configured to determine that foam is present in the lye container (105) if during the detection period (143) an electrical power parameter of the pump (117) detected by the power detection element (131) is smaller than a power parameter threshold (145) and if during the detection period (143) a water level in the lye container (105) detected by the water level detection element (129) is larger than a water level threshold (144).
2. Laundry care device (100) according to claim 1, characterized in that the control means (119) are configured to determine that foam is present in the lye container (105) if during the detection period (143) the electric power parameter of the pump (117) detected by the power detection element (131) is smaller than a power parameter threshold (145) for a minimum duration, in particular for a minimum duration of at least 5 seconds.
3. Laundry care device (100) according to claim 1 or 2, characterized in that the electrical power parameter of the pump (117) detected by the power detection element (131) comprises a motor current of the pump (117).
4. Laundry care device (100) according to one of the preceding claims, characterized in that the control means (119) are configured to determine that no foam is present in the lye container (105) if during the detection period (143) the electric power parameter of the pump (117) detected by the power detection element (131) is greater than a power parameter threshold (145) and/or if during the detection period (143) the water level in the lye container (105) detected by the water level detection element (129) is less than a water level threshold (144).
5. Laundry care device (100) according to one of the preceding claims, characterized in that the laundry care device (100) has a fresh water supply (118-1) which is fluidically connected to the lye container (105) and is fluidically connected to the control device (119);
the control device (119) is configured to activate the fresh water supply device (118-1) for supplying fresh water to the lye container (105) during a supply period (141) occurring before the detection period (143).
6. The laundry care device (100) according to claim 5, characterized in that the control means (119) are configured to activate the pump (117) within the framework of a cyclic pumping process during the supply period (141).
7. Laundry care device (100) according to one of the preceding claims, characterized in that the control means (119) are configured to activate the pump (117) within the framework of a circulation pumping process during a circulation pumping period (147) linked to the detection period (143).
8. Laundry care device (100) according to one of the preceding claims, characterized in that the water level detection element (129) comprises a stand pipe (151) arranged in sections in the lye container (105), wherein a water level sensor for detecting the water level in the stand pipe (151) is arranged on an end of the stand pipe (151) facing away from the lye container (105) for detecting the water level in the lye container (105).
9. The laundry care device (100) according to claim 8, characterized in that the stand pipe (151) is configured as a siphon, comprising a curved section that can be filled with washing liquid and a stand pipe section that extends vertically and can be filled with air, in which the water level sensor is arranged.
10. Laundry care device (100) according to claim 8 or 9, characterized in that the stand pipe (151) has a stand pipe opening (155) on an end (153) facing the lye container (105), which is fluidically connected to the interior of the lye container (105) in order to enable washing liquid and/or foam to penetrate into the stand pipe (151) from the interior of the lye container (105), wherein the stand pipe (151) is mounted in particular in the lye container (151) in such a way that the level (149) of washing liquid in the lye container (105) is arranged below the stand pipe opening (155) during the detection period (141).
11. Laundry care apparatus (100) according to one of the preceding claims, characterized in that the laundry care apparatus (100) has a drum drive (109) for rotating the laundry drum (107), wherein the drum drive (109) is connected to the control device (119) in a control technology, wherein the control device (119) is in particular configured to activate the drum drive (109) during the detection period (143), during the supply period (141) and/or during the circulation pumping period (147) for rotating the laundry drum (107) at a constant rotational speed.
12. Laundry care apparatus (100) according to claim 11, characterized in that the control device (119) is configured to activate the drum drive (109) during a change section engaged in the detection period (143) after determining the presence of foam in the lye container (105) to rotate the laundry drum (107) at a reduced rotational speed to reduce the amount of foam present in the lye container (105).
13. Laundry care apparatus (100) according to one of the preceding claims, characterized in that the control device (119) is configured to activate a fresh water supply device (118-1) of the laundry care apparatus (100) for supplying fresh water to the lye container (105) during a further change section engaged in the detection period (143) after determining that foam is present in the lye container (105).
14. Laundry care apparatus (100) according to one of the preceding claims, characterized in that the control device (119) is configured to deactivate a heating device of the laundry care apparatus (100) for heating the washing liquid in the lye container (105) during a further change section engaged in the detection period (143) after determining the presence of foam in the lye container (105); and/or
The control device (119) is configured to activate a pump-out device (135) of the laundry care appliance (100) for pumping out washing liquid from the lye container (105) during a further change section linked to the detection period (143) after determining the presence of foam in the lye container (105).
15. A method (200) for detecting foam in a laundry care device (100), wherein the laundry care device (100) comprises: an alkaline solution container (105) for receiving a washing solution; -a laundry tub (107) for receiving laundry (129), wherein the laundry tub (107) is arranged in the lye container (105), wherein the lye container (105) has a drain (111) and a supply element (113), which are fluidly connected by a circulation pumping line (115); -a pump (117) configured to pump wash liquid out of the lye container (105) through the discharge opening (111) within the framework of a cyclic pumping process and to pump the pumped wash liquid back into the lye container (105) through the cyclic pumping line (115) and through the supply element (113); a power detection element (131) for detecting an electric power parameter of the pump (117); a water level detection element (129) for detecting a water level in the lye container (105); and a control device (119) which is connected in a control manner to the pump (117), the power detection element (131) and the water level detection element (129), characterized in that the method (200) comprises the following method steps:
-activating (201), by said control means (119), said pump (117) during a detection period (143) within the framework of a cyclic pumping process; and
-Determining, by the control means (119), that foam is present in the lye container (105) if during the detection period (143) the electrical power parameter of the pump (117) detected by the power detection element (131) is smaller than a power parameter threshold (145), and if during the detection period (143) the water level in the lye container (105) detected by the water level detection element (129) is larger than a water level threshold (144).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102023200170.5 | 2023-01-11 | ||
| DE102023200170.5A DE102023200170A1 (en) | 2023-01-11 | 2023-01-11 | Laundry care device with one control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118326673A true CN118326673A (en) | 2024-07-12 |
Family
ID=89222181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410029564.1A Pending CN118326673A (en) | 2023-01-11 | 2024-01-09 | Clothes care equipment with control device |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4400641A1 (en) |
| CN (1) | CN118326673A (en) |
| DE (1) | DE102023200170A1 (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3703917A1 (en) | 1987-02-09 | 1988-08-18 | Bosch Siemens Hausgeraete | METHOD FOR AUTOMATIC WASHING OF LAUNDRY |
| DE4104151A1 (en) | 1991-02-12 | 1992-08-13 | Miele & Cie | Laundry treatment machine with program control - and foam sensing device with switching mechanism to switch on heating device when foam is detected |
| ATE259009T1 (en) | 1999-06-22 | 2004-02-15 | Miele & Cie | WASHING MACHINE WITH A SYSTEM FOR DETERMINING SURFACE TENSION |
| WO2010076148A1 (en) | 2008-12-30 | 2010-07-08 | Arcelik Anonim Sirketi | A washing machine comprising an air trap |
| CN103930609B (en) * | 2011-11-14 | 2016-01-06 | 松下电器产业株式会社 | Tumbling-box washing machine |
| FR3079849B1 (en) * | 2018-04-04 | 2021-05-28 | Groupe Brandt | PROCEDURE FOR RECOMMENDING THE USE OF A WASHING APPLIANCE |
| DE102019208726A1 (en) | 2019-06-14 | 2020-12-17 | BSH Hausgeräte GmbH | Optimizing the properties of a detergent solution and foaming |
| DE102020213390A1 (en) | 2020-10-23 | 2022-04-28 | BSH Hausgeräte GmbH | METHOD FOR DETERMINING FOAM WHEN TREATMENT OF LAUNDRY ITEMS AND LAUNDRY CARE MACHINE FOR CARRYING OUT IT |
-
2023
- 2023-01-11 DE DE102023200170.5A patent/DE102023200170A1/en active Pending
- 2023-12-12 EP EP23215923.6A patent/EP4400641A1/en active Pending
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2024
- 2024-01-09 CN CN202410029564.1A patent/CN118326673A/en active Pending
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| Publication number | Publication date |
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| EP4400641A1 (en) | 2024-07-17 |
| DE102023200170A1 (en) | 2024-07-11 |
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