CN107385768A - For detecting the method for foam and the wash cycle using methods described in washing machine - Google Patents
For detecting the method for foam and the wash cycle using methods described in washing machine Download PDFInfo
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- CN107385768A CN107385768A CN201710197431.5A CN201710197431A CN107385768A CN 107385768 A CN107385768 A CN 107385768A CN 201710197431 A CN201710197431 A CN 201710197431A CN 107385768 A CN107385768 A CN 107385768A
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- liquid level
- washing
- stage
- foam
- washing tube
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Classifications
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- 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
- D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
- D06F34/14—Arrangements for detecting or measuring specific parameters
- D06F34/22—Condition of the washing liquid, e.g. turbidity
-
- 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
- D06F2103/20—Washing liquid condition, e.g. turbidity
-
- 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
- D06F2103/38—Time, e.g. duration
-
- 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
- D06F2105/58—Indications or alarms to the control system or to the user
-
- 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
- D06F2105/58—Indications or alarms to the control system or to the user
- D06F2105/60—Audible signals
Abstract
It is used to determine the method that foam in washing machine (1) be present the present invention relates to a kind of, wherein, washing machine (1) includes washing tube (3) and recirculation pump (21), and washing tube (3) includes cleaning-drum (4).This method comprises the following steps：Stabilization sub stage and recycling stage are performed, wherein, recirculation pump (21) is deactivated in the stabilization sub stage, and recirculation pump (21) is activated in the recycling stage；The first liquid level (L1) of the cleaning solution in washing tube (3) is detected during the stabilization sub stage；The second liquid level (L2) of the cleaning solution in washing tube (3) is detected during the recycling stage；Determine the liquid level difference (LD) between the second liquid level (L2) and the first liquid level (L1)；By identified liquid level difference (LD) compared with threshold value (TV), and determine foam be present if identified liquid level difference (LD) is less than threshold value (TV).
Description
Technical field
The present invention relates to laundry technical field.
Especially, the present invention relates to a kind of method for being used to detect the foam in washing machine during wash cycle.
In addition, the present invention relates to corresponding washing machine.
Background technology
Now, washing machine --- " simple " washing machine (washing machine for being only capable of washing and rinsing clothes) and clothes washer-dryer
Both (washing machine that can also dry clothing) --- it is used widely.
In this manual, term " washing machine " will refer to both simple washing machine and clothes washer-dryer.
Washing machine generally includes to be provided with the external shell of washing tube or casing, and the washing tube, which includes, wherein places clothing
It is rotatable to have hole cleaning-drum.Loading/unloading door guarantees to enter cleaning-drum.
Washing machine is generally included into water loop and for water and washing/rinse products (i.e. detergent, softening agent etc.) to be drawn
Enter the product feeding unit in washing tube.
Known washing machine is additionally provided with the drainage system for discharging cleaning solution from washing tube.Drainage system generally wraps
Include at least one draining pump operated when needed during wash cycle for being arranged in washing bottom of the barrel.
Generally, drainage system discharges cleaning solution from washing machine and/or it makes cleaning solution make in bucket interior recirculation
Cleaning solution is obtained to be transported on clothing again.
According to known technology, complete wash cycle generally includes different stages or step, clothing during which to be washed
Thing is subjected to appropriate processing.
Wash cycle generally includes the starting stage, and appropriate water and detergent are introduced into washing tube in the starting stage
In, wherein, the water and detergent produce the cleaning solution for getting wet clothing.
Then, wash cycle generally includes the main washing stage, at this stage during rotate cleaning-drum, and according to
The cleaning solution that the washing procedure of family selection will be contained in cleaning-drum heats --- generally passing through resistor --- to pre- constant temperature
Degree.
The subsequent step of wash cycle can include the rinse stage for introducing clean water and drain step and finally take off
Water, liquid of the cleaning-drum rotate at high speed and in washing tube is discharged from washing machine in final dewatering.
When the cleaning-drum by rotation makes cleaning solution movement/agitation, some foams are generally produced.Especially, washing
During dehydration and the bleeding stage of washing circulation, substantial amounts of foam can be very harmful, because foam compromises draining pump
Correct operation and its hinder liquid from washing machine discharge.Then, in the case where foam be present, draining pump is noisy
's.
Because detergent is excessively used or because the promotion of detergent in itself forms bubble in user generally in wash cycle
The foaming agent of foam and produce foam.
In addition, excessive foam may cause to overflow, including liquid overflows.
It is more known to be used to operating the known method of washing machine, such as can in method disclosed in WO2015036166
Foam is effectively detected, and takes the dynamic of the amount for reducing the foam inside washing tube and/or in discharging area if necessary
Make.In equilibrium stage and/or in the water smoking, i.e., after the main washing stage, perform the detection and reduction of foam.
However, during starting stage and/or main washing stage, some foams may have been produced.If followed in washing
This early stage of ring produces too many foam, then can not perform some stages in wash cycle like clockwork.
Especially, for the reason for above-mentioned identical, during the water smoking of wash cycle and bleeding stage, substantial amounts of bubble
Foam can be very harmful, especially with regard to the operation of pump.
In addition, during main washing in itself, substantial amounts of foam can be very harmful, because relative to no foam
Normal condition for the detersive efficiency of cleaning solution significantly reduce.
Foam is also possible to cause detergent to gather on clothing.A certain amount of residual detergent be present may cause rinsing not
Fully.Rinse it is insufficient detergent can be left in clothing, the detergent left is enough to influence allergy and sensitive people.
Known a kind of known method for being used to detect the foam in washing machine from the A2 of EP 1731656.Herein, it is real
The foam sensor integrated with temperature sensor is showed.However, from device known to the document be complicated.
This negatively affects the size of washing machine and/or manufacturing cost and its reliability.
It is therefore an object of the present invention to overcome the shortcomings that being caused by known technology.
The primary and foremost purpose of the present invention is to provide a kind of washing machine, and the washing machine causes when necessary can be in wash cycle
The presence of early detection foam.
Another primary and foremost purpose of the present invention is to provide a kind of washing machine, and the washing machine allows to reduce detergent in clothing
On residue.
It is a further object of the present invention to provide a kind of washing machine, the washing machine detects the presence of foam when necessary, and
Know the washing machine of type has the complexity reduced and/or the size of reduction compared to the washing machine.
It is yet another object of the invention to provide a kind of washing machine, the washing machine detects the presence of foam when necessary, and
There is higher reliability compared with the washing machine of known type.
The content of the invention
It has been discovered by the applicants that the stage that liquid level in bucket by determining washing machine is deactivated in recirculation pump with following again
Difference between the stage that ring pump is activated, it may be determined that the presence of foam in cylindric washer.
Therefore, it is used to determine the method that foam in washing machine be present during wash cycle the present invention relates to a kind of, it is described
Washing machine includes：Washing tube, it includes cleaning-drum；Recirculation circuit, it includes being used for liquid from the bottom of the washing tube
The recirculation pump and the recirculation circuit of portion's discharge make such liquid reenter another part of the washing tube；Liquid
Level sensor, it is used to detecting the liquid level in the washing tube, the wash cycle include it is at least one by a certain amount of water and
A certain amount of detergent is introduced into form the stage of cleaning solution in the washing tube, wherein introducing a certain amount of water and a certain amount of
Detergent at least one stage after, the described method comprises the following steps：
- stabilization sub stage and recycling stage are performed, recirculation pump is deactivated described in the stabilization sub stage, in the recycling stage
Described in recirculation pump be activated：
- the first liquid level of the cleaning solution in the washing tube is detected during the stabilization sub stage；
- the second liquid level of the cleaning solution in the washing tube is detected during the recycling stage；
- determine liquid level difference between second liquid level and first liquid level；
- by identified liquid level difference compared with threshold value, and if identified liquid level difference is less than the threshold value, then
It is determined that foam be present.
According to the preferred embodiment of the present invention, the recycling stage performs after the stabilization sub stage.
In accordance with another preferred embodiment of the present invention, the stabilization sub stage performs after the recycling stage.
In a preferred embodiment of the invention, during stabilization sub stage and/or recycling stage, cleaning-drum keeps quiet
Only.
According to the preferred embodiment of the present invention, the first liquid level is detected in predetermined first monitoring cycle.
Preferably, the duration that the first monitoring cycle corresponds to the stabilization sub stage is made a reservation for.
According to the preferred embodiment of the present invention, the second liquid level is detected in predetermined second monitoring cycle.
Preferably, the duration that the second monitoring cycle corresponds to the recycling stage is made a reservation for.
In a preferred embodiment of the invention, the first liquid level is average first liquid level in predetermined first monitoring cycle.
In a preferred embodiment of the invention, the second liquid level is average second liquid level in predetermined second monitoring cycle.
According to the preferred embodiment of the present invention, threshold value is between 2mm and 12mm, preferably between 4mm and 10mm, more
Preferably equivalent to 5mm.
According to the preferred embodiment of the present invention, if it have been determined that foam be present, then at least one foam is taken to reduce
Action.
Preferably, foam reduction action includes one in following action：
- reduce the time of main washing step on the expeced time of the main washing step of wash cycle；
- expection enabling time on the heater of the main washing step of selected circulation reduces heater
Enabling time；
- disable the heater of the washing machine；
- heater of the washing machine is disabled reach the scheduled time；
- change cleaning-drum regular movements on the expection rotational time of the main washing step of selected circulation；
- on the expection rinse step of selected circulation introduce one or more rinse-added steps；
- other water is introduced during main washing step；
- on the expection enabling time of selected circulation reduce the enabling time of the recirculation pump；
- disable the recirculation pump completely.
In a preferred embodiment of the invention, main washing step includes：
- rotate cleaning-drum；
- cleaning solution in the washing tube is heated and/or remains to predetermined temperature；
- enable the recirculation pump.
According to the preferred embodiment of the present invention, foam reduction action includes from the bottom of washing tube removing cleaning solution simultaneously
The discharge step being discharged to the outside.
In a preferred embodiment of the invention, clean water is introduced into washing tube after the draining step, to recover
Enough cleaning solutions.
Preferably, foam reduction action includes sending alert, preferably visual alarm or audible alarm to user.
In another aspect of this invention, it is used to wash clothing during wash cycle in washing machine the present invention relates to one kind
Method, washing machine includes：Washing tube, it includes cleaning-drum；Recirculation circuit, it includes being used for liquid from the washing
The recirculation pump of the bottom discharge of bucket and its such liquid is reentered another part of the washing tube；Level sensing
Device, it is used to detect the liquid level in the washing tube, and the wash cycle includes at least one by a certain amount of water and a certain amount of
Detergent be introduced into the washing tube with formed the stage of cleaning solution and using the cleaning solution the main washing stage, its
In, if it have been determined that the recirculation pump normal work and/or if it have been determined that being washed in main washing stage
The liquid level of the cleaning solution in foregoing description washing tube is higher than predetermined minimum liquid level, then methods described includes basis to take up an official post
The method for being used to determine to have foam of one content.
In another aspect of this invention, the present invention relates to washing machine, wherein, the washing machine is provided for the above method.
Brief description of the drawings
In the detailed description to the preferred embodiment of the present invention provided below with reference to accompanying drawing, it will emphasize in more detail
The more features and advantage of the present invention.In the accompanying drawings, corresponding feature and/or part are indicated by the same numbers.At this
In the accompanying drawing of sample：
- Fig. 1 shows the stereogram of the washing machine according to the preferred embodiment of the present invention；
- Fig. 2 shows the schematic sectional front view of the washing machine according to the preferred embodiment of the present invention；
- Fig. 3 shows the side for being used to operate washing machine during wash cycle according to the preferred embodiment of the present invention
The indicative flowchart of method；
- Fig. 4 A show the indicative flowchart in the stage of Fig. 3 method；
- Fig. 4 B show the alternative indicative flowchart in the stage of Fig. 3 method；
- Fig. 5 to Fig. 8 shows Fig. 3 other preferred embodiment.
Embodiment
As described below, the present invention is proved to be particularly advantageous when applied to washing machine.Anyway it is emphasized that
The invention is not restricted to washing machine.On the contrary, the present invention, which can be conveniently used in clothes washer-dryer, (can also dry washing for clothing
Clothing machine).
Therefore, in this manual, term " washing machine " will refer to both simple washing machine and clothes washer-dryer.
With reference to figure 1 and Fig. 2, the washing machine 1 according to the preferred embodiment of the present invention is described.
Washing machine 1 includes external shell or casing 2, is provided with external shell or casing 2 and includes cleaning-drum 4 with holes
Washing tube 3, pending clothing can be loaded in cleaning-drum 4.
Casing 2 is provided with preceding loading/unloading door 8, and preceding loading/unloading door 8 allows access into washing tube 3 and cleaning-drum 4.
Washing tube 3 is preferably suspended in housing 2 in floating manner, advantageous by unshowned multiple spiral shells herein
Rotation spring and damper are hung.
Advantageously, rotate cleaning-drum 4 by sightless electro-motor, wherein it is preferred to, electro-motor is advantageously
The axle of cleaning-drum 4 is transmitted rotary movement to by unshowned belt/pulley system.In the different embodiments of the present invention
In, motor can be directly associated with the axle of cleaning-drum 4.
Enter water loop 5 and product feeding unit 6 is disposed in the top of washing machine 1, enter water loop 5 and product feeding unit
6 are applied to water and washing/rinse products (i.e. detergent, softening agent etc.) being fed in washing tube 3.Enter the control of water loop 5 to come
From the interior receipts (adduction) of outside supply line E --- hereinafter referred to as water service device E --- cold water.
In various embodiments, enter water loop to can be implemented as controlling the hot water from phase hot water external source
Interior receipts.
Product feeding unit 6, which preferably includes, to be provided with suitable for the various compartments filled with washing and/or rinse products
Removable drawer 6.
In embodiment as described herein, by running water through drawer 6 and feeding water into washing by supply pipe 9
In bucket 3.
In a preferred embodiment, the water of arrival washing tube 3 can optionally be included and is contained in the compartment of drawer 6
One in product, or such water can be clean, and in this case, it can bypass the compartment of drawer 6
Directly reach washing tube 3.
In the alternative embodiment of the present invention, another single feed pipe can be set, and it is specially by clean water
It is fed in washing tube 3.
Entering water loop 5 preferably includes water flow sensing unit, such as flowmeter, and it makes it possible to calculating and is fed to washing tube
Water in 3.
Washing machine 1 advantageously comprises goes out water loop 25 suitable for extracting liquid out from bucket 3.
Go out water loop 25 and preferably include supervisor 17, draining pump 26 and the outlet 28 terminated at outside casing 2.
Go out the filter 12 that water loop 25 preferably also includes being arranged between supervisor 17 and draining pump 26.Filter
12 are applied to block all undesirable main bodys (for example, having been detached from the button of clothing, entering by mistake through the coin etc. of washing machine).
Preferably, can be moved by the door 14 on the antetheca of the casing 2 for being advantageously arranged in washing machine 1 shown in Fig. 1
Except the filter 12, and then cleaned.
In unshowned another embodiment, filter 12 can be arranged directly in bucket 3, preferably with after
Obtained in the individual construction of person.In this case, with cause from bucket 3 discharge water and cleaning solution enter filter 12 so
Mode cause the communication of filter 12 and bucket 3.
The startup of draining pump 26 by liquid, i.e., filthy water or be mixed with washing and/or rinse products water be discharged to from bucket 3 it is outer
Portion.
Washing machine 1 advantageously comprises recirculation circuit 20, and it is applied to that liquid is discharged and made from the bottom section of bucket 3
Such liquid reenters the upper area of the second area of bucket 3, preferably bucket 3.
Recirculation circuit 20 preferably includes recirculation pump 21, filter 12 is connected to the pipe 22 of recirculation pump 21,
And recirculation pipe 23, recirculation pipe 23 are preferably provided with the end nozzle being preferably arranged at the upper area of bucket 3
23a.Suitably arrange end nozzle 23a so that liquid is directly injected in roller 4 by its hole.
Therefore, end nozzle 23a enhances liquid and passes through distribution of the perforated roller 4 on clothing.
In various embodiments, recirculation circuit can be preferably implemented as independently of the loop for going out water loop.
By enabling recirculation pump 21, the liquid of the bottom section from bucket 3 is transported to the upper area of bucket 3.
Hence it is advantageous to recirculation circuit 20 is enabled, to improve the wetting of the clothing in roller 4.
Preferably, recirculation circuit is appropriately carried out, by a part of liquid from the bottom section of bucket preferably from storage tank
The upper area of bucket is transferred to, to strengthen absorption of the clothing to liquid.
However, it is possible to be appropriately carried out recirculation circuit, a part of liquid is transferred to from bucket allows clothing absorbing liquid
Another region of the bucket of body.For example, recirculation pipe can be terminated in any upright position of bucket and/or its end nozzle
Suitable shape can be formed to spray liquid along the direction for reaching the clothing in cleaning-drum 4.
Advantageously, washing machine 1 includes the device 19 for the liquid level being applied in sensing (or detection) washing tube 3.
Device 19 preferably includes the pressure sensor of the pressure in sensing washing tube 3, and the value in washing tube 3 with containing
Liquid liquid level it is relevant.In another unshowned embodiment, washing machine 1 includes (in addition to pressure sensor or making
For the alternative of pressure sensor) liquid level sensor of the liquid level that is applied in sensing (or detection) washing tube 3 (such as machinery,
Electromechanical, it is optical etc.).
Preferably, washing machine 1 includes it suitable for being contacted with the liquid washing tube 3 and heating the liquid in washing tube 3
Heater 60.
Heater 60, it is therefore preferable to resistor, it is preferably rested in unshowned suitable base, wherein, base
Obtain in the bottom of washing tube 3 or obtained in the discharge areas of washing tube 3.
In various embodiments, it is convenient to omit heater.In the first preferred embodiment, without heater
Washing machine can introduce the hot water from phase hot water external source.In the second preferred embodiment, without heater
The cold water from external water source E can be used only to perform wash cycle in washing machine.
Washing machine 1, which advantageously comprises, is connected to the various pieces of washing machine 1 to ensure the control unit 22 of its operation.Control
Unit 22 processed is preferably coupled into water loop 5, goes out water loop 25 (particularly draining pump 26), recirculation circuit 20 (particularly
Recirculation pump 21), the motor of rotation cleaning-drum 4, and for example intake back from the various sensors being arranged on washing machine 1
The receive informations such as the flowmeter on road 5, liquid level sensor 19 (or pressure sensor), temperature sensor.
Especially, the liquid level detected by liquid level sensor 19 is preferably continuously received by control unit 22, and according to this hair
It is bright to be advantageously used, it will preferably be described below.
Or when needed, obtained by the liquid level that liquid level sensor 19 detects by control unit 22 in the scheduled time.
Washing machine 1 advantageously comprises the interface unit 50 for the user-accessible for being connected to control unit 22, and passes through this
Interface unit user can select and set washing parameter every now and then, particularly desired washing procedure.By washing for user's selection
Program is washed by corresponding to the corresponding wash cycle performed by washing machine.Generally, user can be optionally inserted other specification, example
Such as wash temperature, dewatering speed, load for the weight of laundry item etc..Interface unit 50 preferably includes display laundry
The display of machine working condition or other information.
Based on the parameter obtained by the interface unit 50, the various pieces of washing machine 1 are set and controlled in control unit 22
To perform desired wash cycle.
According to the favourable aspect of the present invention, determine washing tube 3 using recirculation pump 21 and liquid level sensor 19 and/or wash
Wash presence and/or the amount of the foam in the discharge areas of bucket 3.
Introduced in washing tube 3 after water and detergent, according to the present invention, wash cycle is preferably carried out foam and detected
Journey, it includes the recycling stage after stabilization sub stage and stabilization sub stage, and recirculation pump is deactivated in the stabilization sub stage, is following again
Recirculation pump is activated in loop order section.
Or foam detection process includes the stabilization sub stage after recycling stage and recycling stage, in recycling rank
Recirculation pump is activated in section, and recirculation pump is deactivated in the stabilization sub stage.
During the stabilization sub stage, the liquid level L1 of liquid is preferably detected by liquid level sensor 19.During the recycling stage,
The liquid level L2 of liquid by liquid level sensor 19 it is also preferred that detected.Then, control is preferably passed through according to the detected value L1, L2 of liquid
Unit 22 determines liquid level L2 in the recycling stage or the second liquid level L2 and the liquid level L1 or the first liquid in the stabilization sub stage
Liquid level difference LD, i.e. LD=L2-L1 between the L1 of position.
Advantageously, if it is determined that liquid level difference LD be less than threshold value TV, i.e. LD=L2-L1<TV, it is determined that in washing tube 3
And/or foam and/or substantial amounts of foam in the discharge areas of washing tube 3 be present.
If liquid level difference LD is greater than or equal to threshold value TV, detects and only exist water or a small amount of foam.
What applicant was carried out tests the small difference it has been proved that between two liquid levels, the i.e. difference less than threshold value, represents
Foam and/or substantial amounts of foam in washing tube 3 be present.
The fact that this is due to following：In the presence of foam the cisco unity malfunction of recirculation pump 21 and can not will
Liquid and/or foam are pumped towards end nozzle 23a and the top pumping from end nozzle 23a towards clothing.Therefore, first,
Recirculation circuit 20, particularly its pipeline 22,23 keep empty or substantially sky, and the liquid level detected by liquid level sensor 19
It is the effective liquid being present in washing tube 3.
In addition, when recirculation pump is activated, because liquid is not sprayed on clothing, so during the recycling stage
The absorption carried out in the absence of clothing, therefore the liquid level L2 detected in the recycling stage by liquid level sensor 19 is relative to steady
The liquid level L1 for determining to be detected by liquid level sensor 19 in the stage is substantially constant.
Therefore, according to the favourable aspect of the present invention, liquid level when being deactivated by comparing recirculation pump in washing tube 3 and again
Liquid level when circulating pump is activated in washing tube 3, foam and/or substantial amounts of foam be present to detect in washing tube 3.
As set forth above, it is possible to disable and then enable recirculation pump, or enable and then disable recirculation pump.
Preferably, the first liquid level L1 and/or the second liquid level L2 is detected when cleaning-drum 4 is static.In this case, wash
Wash the liquid level in roller is not influenceed by caused vibration is rotated by cleaning-drum.
It is highly preferred that while 4 remains stationary of cleaning-drum, the first liquid is detected at the end of the first monitoring cycle Δ t1
Position L1；And/or while 4 remains stationary of cleaning-drum, the second liquid level is detected at the end of the second monitoring cycle Δ t2
L2。
In another preferred embodiment, the first liquid level L1 is the liquid calculated during the first predetermined monitoring cycle Δ t1
Average first liquid level AL1 of the body in the stabilization sub stage.
Here again, it is preferable that during the first monitoring cycle Δ t1, the remains stationary of cleaning-drum 4.
However, in another preferred embodiment, can be while cylindric washer 4 rotates in the first predetermined monitoring
Average first liquid level AL1 is calculated during period Δ t1.
Average first liquid level AL1 is preferably calculated in the following way：
Wherein t1i is the first monitoring cycle Δ t1 initial time, and t1f is the first monitoring cycle Δ t1 termination time.
Similarly, in another preferred embodiment, the second liquid level L2 is during the second predetermined monitoring cycle Δ t2
Average second liquid level AL2 of the liquid of calculating in the recycling stage.
Here again, it is preferable that during the second monitoring cycle Δ t2, the remains stationary of cleaning-drum 4.
However, in another preferred embodiment, can be while cylindric washer 4 rotates in the second predetermined monitoring
Average second liquid level AL2 is calculated during period Δ t2.
Average second liquid level AL2 is preferably calculated in the following way：
Wherein t2i is the second monitoring cycle Δ t2 initial time, and t2f is the second monitoring cycle Δ t2 termination time.
Then, if being less than threshold value TV, i.e. LD=AL2-AL1 using the liquid level difference LD of the average value<TV, it is determined that
Foam and/or substantial amounts of foam in washing tube 3 and/or in the discharge areas of washing tube 3 be present.
In the normal operating condition of wash cycle, i.e. there is no to form foam in washing tube 3, if liquid level difference
LD is more than or equal to threshold value TV, i.e. LD=L2-L1 >=TV, it is determined that only exists water or a small amount of foam.
In various embodiments, liquid level can be calculated by different way, such as continuously calculates liquid level (instantaneous liquid
Position).
Preferably, the first monitoring cycle Δ t1 is preferably arranged to the duration of stabilization sub stage and/or preferably will
Second monitoring cycle Δ t2 is arranged to the duration in recycling stage.
In various embodiments, the first predetermined monitoring cycle Δ t1 and Δ t2 can have the different duration
And/or can discriminatively it be arranged in corresponding stabilization sub stage and recycling stage.
In other preferred embodiment, preferably by the first monitoring cycle Δ t1 and/or the second monitoring cycle Δ t2
It is arranged to predetermined value, such as 6 seconds.In this case, the first monitoring cycle Δ t1 is less than the duration of stabilization sub stage, and
Second monitoring cycle Δ t2 is less than the duration in recycling stage.
In other preferred embodiment, the first monitoring cycle Δ t1 is preferably arranged to predetermined value, such as 6 seconds
Fixed value.
In other preferred embodiment, the second monitoring cycle Δ t2 is preferably arranged to predetermined value, such as 14 seconds
Fixed value.
Liquid level difference LD threshold value TV is preferably arranged to predetermined value, such as 5mm fixed value.
Preferably, threshold value is between 2mm and 12mm, more preferably between 4mm and 10mm.
Preferably, foam detection process performs one or more times during the main washing stage of wash cycle, such as later
This will preferably be described.
However, foam detection process can perform at any other moment of wash cycle --- clearly in Jiang Shui and wash
Wash after agent is introduced into washing tube 3, such as this will preferably be described later.
According to another favourable aspect of the present invention, if it have detected that foam in washing tube 3 be present, then preferably take
One or more foam reduction actions.
Hereinafter, the possible foam reduction action that can be preferably carried out is described.
The foam reduction action that can be performed after the foam in detecting washing tube 3 preferably includes：Relative to washing
Expeced time of the main washing stage of circulation is washed to reduce the time of main washing stage.
The main washing stage can be defined as following stages in wash cycle：During the stage, cleaning-drum rotation,
And the cleaning solution that the washing procedure selected according to user will be contained in cleaning-drum heats and/or remained to predetermined temperature.
Moreover it is preferred that during the main washing stage, recirculation pump 21 is suitably enabled and disables, by a part of liquid from bucket 3
Bottom section is transferred to the upper area of bucket 3 so that liquid is sprayed onto on clothing and promotes to absorb.
The main washing stage wash cycle continuous step before rinse stage, equilibrium stage, the water smoking.
As the result for the time for reducing the main washing stage, the rotational time of cleaning-drum 4 is decreased, therefore avoid
Excessive movement/agitation of liquid in washing tube 3.Therefore, foam quickly decomposes.
Another foam reduction action that can be performed after the foam in detecting washing tube 3 preferably includes：On
The expection enabling time of the heater of the main washing stage of selected circulation reduces the enabling time of heater.At this
In the case of kind, heater can disable completely in the remaining time of main washing stage.Again, foam quickly decomposes.
Another foam reduction action that can be performed after the foam in detecting washing tube 3 preferably includes：On
The expection rotational time of the main washing stage of selected circulation changes washing tube regular movements, it is preferable that reduces cleaning-drum
Rotational time.
The reduction of the rotational time of cleaning-drum avoids excessive movement/agitation of the liquid in washing tube, therefore foam
Quickly decompose.
Another foam reduction action that can be performed after the foam in detecting washing tube 3 preferably includes：On
The expection rinse stage of selected circulation introduces one or more rinse-added stages.
Discharge of the decomposition and foam of rinse-added stage increase foam to outside.
Another foam reduction action that can be performed after the foam in detecting washing tube 3 preferably includes：In master
Other water is introduced during washing stage.
Extra water is introduced into the concentration for reducing the detergent in washing tube 3, therefore advantageously reduces foam generation
Possibility.
Another foam reduction action that can be performed after the foam in detecting washing tube 3 preferably includes：It will wash
Wash the discharge stage that liquid is removed and is discharged to the outside from the bottom of washing tube.
The discharge of cleaning solution reduces the concentration of the detergent in washing tube 3, therefore advantageously reduces caused by foam
Possibility.
In a preferred embodiment, one or more water of execution introduce stage and/or one or more draining ranks
Section.
In a preferred embodiment, a certain amount of clean water is incorporated into washing tube 3 after bleeding stage, with extensive
It is multiplexed enough cleaning solutions in main wash.Being introduced into of clean water reduce further the detergent in washing tube 3
Concentration.
The other foam reduction action that can be performed after the foam in detecting washing tube 3 preferably includes：Close
Change/reduce the enabling time of recirculation pump 21 in the expection enabling time of selected circulation.Which enhance foam more
Quickly decompose.
In another preferred embodiment, recirculation pump 21 is disabled completely.
Another action that can be performed after the foam in detecting washing tube 3 preferably includes：Send and warn to user
Alarm report, such as visual alarm or audible alarm at the display of interface unit 50.Due to the formation of foam be probably by
Caused by detergent use in excessive detergent or mistake, so foam alarm can be useful for user, because it
It is recommended that how user prevents from forming foam in laundry wash cycle in the future, such as select correct detergent.
Fig. 3 shows the method for being used to operate washing machine during wash cycle according to the preferred embodiment of the present invention
Indicative flowchart.
Clothing to be washed is put into (step 100) in cleaning-drum 4 first.
By operate interface unit 50, user selects desired washing procedure (step 110).
In the next step in (step 120), start the wash cycle of the washing procedure selected according to user.As next
Step (step 130), this method provide with the next stage：In this stage, preferably list is supplied by entering water loop 5 and product
A certain amount of water Qw and a certain amount of detergent Qd are introduced into washing tube 3 to form the cleaning solution for being used for washing clothing by member 6.
During at this stage, cleaning-drum 4 is advantageously rotated with preferable regular movements.
It is washed out circulation and carries out main washing stage (step 170).
In shown preferred embodiment, the main washing stage includes：Periodically enable (step 172) and disable (step
Rapid 174) recirculation pump 21, the bottom section of a part of liquid from bucket 3 is transferred to the upper area of bucket 3 so that liquid quilt
It is sprayed on clothing and promotes to absorb.
(the step 170) during the main washing stage, cleaning-drum is then preferably rotated, and washed according to what user selected
Wash the cleaning solution that program will be contained in cleaning-drum and heat and/or remain to predetermined temperature.
According to a preferred aspect of the present invention, (step 170) performs foam detection process (step during the main washing stage
200,200 ').
In particular it is preferred to ground performs after recirculation pump 21 is disabled and before recirculation pump 21 is enabled again
Foam detection process (step 200,200 ').
First preferred embodiment (step 200) of foam detection process is preferably described with reference to figure 4A.
The second preferred embodiment of foam detection process (step 200 ') is preferably described with reference to figure 4B.
Referring to Fig. 4 A, the first preferred embodiment (step 200) of foam detection process preferably includes making washing first
The step of roller 4 stops (step 210) --- obviously in the case where cleaning-drum 4 rotates.By static static of cleaning-drum 4
State keeps predetermined amount of time, such as 6 seconds, to ensure the good measurement (step to the first liquid level L1 in washing tube 3
230) --- preferably detected by pressure sensor 19.Predetermined amount of time corresponds to the duration of stabilization sub stage, and
And preferably correspond to the first monitoring cycle Δ t1 as defined above.
Then (the step 240) of recirculation pump 21 is enabled, and after predetermined amount of time such as 14 seconds, is performed to washing tube
Measurement (the step 250) of the second liquid level L2 in 3.Predetermined amount of time corresponds to the duration in recycling stage, and preferably
Ground corresponds to the second monitoring cycle Δ t2 as defined above.
In then the step of, the liquid level difference LD (steps 260) between the second liquid level L2 and the first liquid level L1 are calculated.
According to the present invention, if liquid level difference LD is less than threshold value TV (the output "Yes" of step 260), it is determined that foam be present
(step 270).
If liquid level difference LD is more than or equal to threshold value TV (the output "No" of step 260), this method is normally carried out, without
It can determine whether the presence of foam.
Referring to Fig. 4 B, the second preferred embodiment of foam detection process (step 200 ') preferably includes making washing first
The step of roller 4 stops (step 210) --- obviously in the case where cleaning-drum 4 rotates.
Then recirculation pump 21 (step 240 ') is enabled, and after predetermined amount of time such as 14 seconds, is performed to washing
The measurement (step 250 ') of the second liquid level L2 in bucket 3.Predetermined amount of time corresponds to the duration in recycling stage, and excellent
Selection of land corresponds to the second monitoring cycle Δ t2 as defined above.
Then recirculation pump 21 (step 219 ') is disabled, and the static inactive state of cleaning-drum 4 is kept predetermined
Period, such as 6 seconds, to ensure the good measurement (step 230 ') to the first liquid level L1 in washing tube 3 --- preferably
Detected by pressure sensor 19 on ground.Predetermined amount of time correspond to the stabilization sub stage duration, and preferably correspond to as
First monitoring cycle Δ t1 defined in upper.
In then the step of, the liquid level difference LD (step 260 ') between the second liquid level L2 and the first liquid level L1 is calculated.
According to the present invention, if liquid level difference LD is less than threshold value TV (step 260 ' output "Yes"), it is determined that foam be present
(step 270 ').
If liquid level difference LD is more than or equal to threshold value TV (step 260 ' output "No"), this method is normally carried out, and
The presence of foam is not can determine whether.
Return to wash cycle, as shown in figure 3, after the main washing stage 170, wash cycle advantageously carry out one or
Multiple rinse cycles (step 180 and 190), clean washings are added to clothing and cleaning-drum during rinse cycle
Rotation is with extraction water and dirty particle/detergent from clothing：The sewage extracted is discharged to the outside from washing tube 3.
Wash cycle terminates at last water smoking (step 195).
Once wash cycle is over, then in the case of clothes washing-drying machine, drying can also be preferably carried out
Stage.
It must be noted that if had determined during foam detection process (step 200,200 ') foam (step be present
Rapid 270,270 '), then the wash cycle shown in Fig. 3 finally and is suitably adapted to the one or more of previously described type
The execution of foam reduction action.
Fig. 5 shows the modification for the wash cycle that previous reference picture 3 describes.
The corresponding steps of Fig. 3 wash cycle are identified by identical reference.
The wash cycle difference that the wash cycle describes with previous reference picture 3 is：By a certain amount of water Qw and one
Quantitative detergent Qd introduces the stage of washing tube 3 by introducing first a certain amount of water Q1w first stage (step 135), using
And in the process (step 300) for the normal operation for checking recirculation pump 21 and by second a certain amount of water Q2w a certain amount of wash
Wash the stage (step 140) replacement that agent Qd introduces washing tube 3.
Make it possible to obtain on recirculation pump 21 not described herein for the correct running of recirculation pump 21
The information correctly run, and appropriate action is taken in this case.
When it is determined that recirculation pump 21 is out of order, the action that can be performed is to omit the foam detection process of wash cycle,
Or, in other words, if it have been determined that the normal work of recirculation pump 21, then perform foam detection process.
In another preferred embodiment of unshowned wash cycle, by a certain amount of water Qw and a certain amount of washing
Agent Qd is introduced into after the stage in washing tube 3 and (the step 170) before the main washing stage, performs and checks in washing tube 3
The step of liquid level L.
If liquid level L is less than or equal to predetermined minimum liquid level Lmin, the foam detection process of wash cycle is omitted, or
In other words, if it have been determined that the liquid level L in washing tube 3 is higher than predetermined minimum liquid level Lmin, then foam detection process is performed.
Fig. 6 shows another modification for the wash cycle that previous reference picture 3 describes.
The wash cycle briefly illustrates how any reasonable time during main washing stage (step 370) has
Foam detection process (step 200,200 ') is performed sharply --- it is unrelated with the action performed in the same main washing stage.
Similarly, Fig. 7 shows following wash cycle：In the wash cycle, water and detergent are being introduced into washing
Advantageously foam detection process is performed after 3 (steps 130) of bucket and before main washing stage (step 470) (step 200,
200’)。
Similarly, Fig. 8 shows following wash cycle：In the wash cycle, main washing stage (step 470) it
Foam detection process (step 200,200 ') is advantageously performed afterwards.
Advantageously, the method according to the invention allows the different phase in wash cycle, the preferably morning in wash cycle
Phase detects foam.
As can be seen here, can be acted from the foam of the execution at the beginning reduction of wash cycle.Relative to known method, this is helped
In accumulation of the reduction detergent on clothing.
Advantageously, moreover detected by the liquid level sensor being typically mounted in washing machine to perform foam, without
Install and control special foam sensor.
Therefore, method of the invention makes it possible to detection has reduction compared with the washing machine of the detection foam of known type
Complexity and/or size washing machine in foam.
As can be seen here, compared with the washing machine of the detection foam of known type, the laundry equipment of the method for the present invention is performed
There is higher reliability.
Advantageously still, foam in the porch of pump be present because substantially avoid, institute is in the method in accordance with the invention
Ensure to be arranged on the more accurate operation of the pump that liquid is discharged from washing tube in washing machine.This transfers to reduce by with bubble
Noise caused by the pump that foam works together.
Advantageously, the method according to the invention is reduced or avoided overflow and liquid and overflowed from washing tube.
Accordingly, it has been shown that the present invention allows for the purpose of all settings.Especially, can provide has and known system
Washing machine and method of the system compared to more effective foam detecting system.
, it is emphasized that being shown in the drawings and describe some embodiment party of the method according to the invention with reference to it
The washing machine of formula is muzzle-loading type；However, it is clear that the method according to the invention can also there is no any modification
Ground is applied to top loading machines.
Although the illustrated embodiment of the present invention is described with reference to the accompanying drawings herein, but it is to be understood that this hair
It is bright to be not limited to those accurate embodiments, but those skilled in the art can realize various other changes and modification wherein
Without departing from the scope or spirit of the invention.All such changes and modifications are intended to be included in what is be defined by the following claims
In the scope of the present invention.
Claims (15)
1. one kind is used to determine the method that foam in washing machine (1) be present during wash cycle, the washing machine (1) includes：
Washing tube (3), the washing tube (3) include cleaning-drum (4)；Recirculation circuit (20), the recirculation circuit (20) include
Recirculation pump (21) and the recirculation circuit (20) for liquid to be discharged from the bottom of the washing tube (3) make described
Liquid reenters another part of the washing tube (3)；Liquid level sensor (19), the liquid level sensor (19) are used to detect
Liquid level in the washing tube (3), the wash cycle include at least one by a certain amount of water (Qw) and a certain amount of washing
Agent (Qd) is introduced into the washing tube (3) to form the stage of cleaning solution, wherein, introducing a certain amount of water (Qw) and a certain amount of
Detergent (Qd) at least one stage after, the described method comprises the following steps：
- stabilization sub stage and recycling stage are performed, recirculation pump (21) is deactivated described in the stabilization sub stage, described
Recirculation pump (21) described in the recycling stage is activated：
- the first liquid level (L1) of the cleaning solution in the washing tube (3) is detected during the stabilization sub stage；
- the second liquid level (L2) of the cleaning solution in the washing tube (3) is detected during the recycling stage；
- determine liquid level difference (LD) between second liquid level (L2) and first liquid level (L1)；
- by identified liquid level difference (LD) compared with threshold value (TV), and if identified liquid level difference (LD) is less than institute
State threshold value (TV), it is determined that foam be present.
2. according to the method for claim 1, wherein, the recycling stage performs after the stabilization sub stage.
3. according to any method of the preceding claims, wherein, in the stabilization sub stage and/or the recycling rank
During section, cleaning-drum (4) remains stationary.
4. according to any method of the preceding claims, wherein, detected in predetermined first monitoring cycle (Δ t1)
First liquid level (L1).
5. according to the method for claim 4, wherein, predetermined first monitoring cycle (Δ t1) corresponds to the stable rank
The duration of section.
6. according to any method of the preceding claims, wherein, detected in predetermined second monitoring cycle (Δ t2)
Second liquid level (L2).
7. according to the method for claim 6, wherein, predetermined second monitoring cycle (Δ t2) corresponds to the recycling
The duration in stage.
8. the method according to any one of claim 4 to 7, wherein, first liquid level (L1) is described predetermined the
Average first liquid level (AL1) in one monitoring cycle (Δ t1).
9. the method according to any one of claim 6 to 8, wherein, second liquid level (L2) is described predetermined the
Average second liquid level (AL2) in two monitoring cycles (Δ t2).
10. according to any method of the preceding claims, wherein, the threshold value (TV) is excellent between 2mm and 12mm
Selection of land is between 4mm and 10mm, more preferably equal to 5mm.
11. according to any method of the preceding claims, wherein, if it have been determined that foam be present, then take to
Few foam reduction action.
12. according to the method for claim 11, wherein, the foam reduction action includes one in the following action
Person：
- on the expeced time of the main washing step of the wash cycle reduce the time of the main washing step；
- expection the enabling time on the heater of the main washing step of selected circulation reduces the heater
Enabling time；
- disable the heater of the washing machine (1)；
- heater of the washing machine (1) is disabled reach the scheduled time；
- change the regular movements of the cleaning-drum on the expection rotational time of the main washing step of selected circulation；
- on the expection rinse step of selected circulation introduce one or more rinse-added steps；
- other water is introduced during the main washing step；
- on the expection enabling time of selected circulation reduce the enabling time of the recirculation pump (21)；
- disable the recirculation pump (21) completely.
13. the method according to claim 11 or 12, wherein, the foam reduction action includes：Send and alert to user
Alarm, the alert are preferably visual alarm or audible alarm.
14. one kind is used for the method for washing clothing during wash cycle in washing machine (1), the washing machine (1) includes：Wash
Bucket (3) is washed, the washing tube (3) includes cleaning-drum (4)；Recirculation circuit (20), the recirculation circuit (20) include using
Make the liquid in the recirculation pump (21) and the recirculation circuit (21) for discharging liquid from the bottom of the washing tube (3)
Body reenters another part of the washing tube (3)；Liquid level sensor (19), the liquid level sensor (19) are used to detect institute
The liquid level in washing tube (3) is stated, the wash cycle includes at least one by a certain amount of water (Qw) and a certain amount of detergent
(Qd) it is introduced into the washing tube (3) to form the stage of cleaning solution and the main washing stage using the cleaning solution, its
In, if it have been determined that the recirculation pump (21) normal work and/or if it have been determined that in the main washing stage
The liquid level of the cleaning solution in washing foregoing description washing tube (3) is higher than predetermined minimum liquid level (Lmin), then methods described bag
Include the method according to any one of the preceding claims for being used for determination and foam being present.
15. a kind of washing machine (1), wherein, the washing machine (1) is provided for according to any one of claim 1 to 14 institute
The method stated.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP16166320.8A EP3235940B1 (en) | 2016-04-21 | 2016-04-21 | Method for the detection of foam in a laundry washing machine, and washing machine |
| EP16166320.8 | 2016-04-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107385768A true CN107385768A (en) | 2017-11-24 |
| CN107385768B CN107385768B (en) | 2021-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710197431.5A Active CN107385768B (en) | 2016-04-21 | 2017-03-29 | Method for detecting bubbles in washing machine, method for washing laundry, and washing machine |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP3235940B1 (en) |
| CN (1) | CN107385768B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112074635A (en) * | 2018-05-04 | 2020-12-11 | 伊莱克斯家用电器股份公司 | Method for operating a washing machine comprising a recirculation circuit |
| CN112575508A (en) * | 2020-11-26 | 2021-03-30 | 珠海格力电器股份有限公司 | Foam control method of washing machine and washing machine |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112695491B (en) * | 2019-10-23 | 2023-07-25 | 无锡飞翎电子有限公司 | Laundry treating apparatus, method of controlling the same, apparatus for controlling the same, and readable medium storing program for controlling the same |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN107385768B (en) | 2021-03-30 |
| EP3235940B1 (en) | 2020-07-29 |
| EP3235940A1 (en) | 2017-10-25 |
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