CN107385769A - Method for detecting foam in washing machine - Google Patents
Method for detecting foam in washing machine Download PDFInfo
- Publication number
- CN107385769A CN107385769A CN201710197503.6A CN201710197503A CN107385769A CN 107385769 A CN107385769 A CN 107385769A CN 201710197503 A CN201710197503 A CN 201710197503A CN 107385769 A CN107385769 A CN 107385769A
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- Prior art keywords
- washing
- foam
- washing tube
- washing machine
- water
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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
- 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
- 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
- D06F2103/16—Washing liquid temperature
-
- 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
- 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
- D06F2105/10—Temperature of washing liquids; Heating means therefor
-
- 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
-
- 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
- D06F2105/52—Changing sequence of operational steps; Carrying out additional operational steps; Modifying operational steps, e.g. by extending duration of steps
-
- 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
-
- 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
Abstract
It is used to operate washing machine (1 the present invention relates to one kind, 200) method, the washing machine have the washing tube (3) comprising cleaning-drum (4) and the heater (20) for heating the liquid in washing tube (3).This method comprises the following steps：A certain amount of water and a certain amount of detergent are introduced into washing tube (3) to form cleaning solution；Heated scrub；Determine programming rate (TS)；By identified programming rate (TS) compared with threshold value (TV), and determine foam be present if identified programming rate (TS) is more 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 --- it is dry including " simple " washing machine (washing machine for being only capable of washing and rinsing clothes) and laundry
Both clothing machines (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 includes revolving for accommodating clothing
What is turned has 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 be arranged in washing bottom of the barrel at least one draining pump, at least one draining pump during wash cycle needs when
Wait operating.
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, in these different ranks
Washed clothing is set to be subjected to appropriate processing during section or step.
Wash cycle generally includes the initial wetting stage, and appropriate water and detergent, which are introduced into, in the initial wetting stage washes
Wash in bucket, wherein, the water and detergent produce the cleaning solution for moistened garment.
Then, wash cycle generally includes the main washing stage, period cleaning-drum rotation, and be contained in and wash at this stage
Wash the washing procedure that the cleaning solution in roller selects according to user and be heated --- generally passing through resistor --- to predetermined temperature.
The subsequent step of wash cycle can include the rinse stage for introducing clean water and drain step and finally take off
Water, during final dewatering, cleaning-drum rotate at high speed and makes liquid in washing tube be discharged from washing machine.
When the cleaning-drum by rotation makes cleaning solution movement/agitation, some foams are generally produced.Especially, washing
During rotation and the bleeding stage of washing circulation, substantial amounts of foam can be very unfavorable, because foam can damage draining pump just
Really operate and it can hinder liquid to be discharged from machine.Then, in the case where foam be present, draining pump is noisy.
Foam is often as that detergent is excessively used in user or the promotion due to detergent in itself forms foam
Infusion and result from wash cycle.
In addition, excessive foam may cause it is excessive, including liquid overflow.
It is more known to be used to operating the existing method of washing machine, such as can in method disclosed in WO2015036166
Foam is effectively detected, and can take action to reduce the amount of the foam inside washing tube and/or in discharging area if necessary.
The detection and reduction of foam are carried out in equilibrium stage and/or in the water smoking, i.e. after the main washing stage.
However, during wetting stage and/or main washing stage, a certain amount of foam may have been generated.If
This early stage of wash cycle produces too many foam, then some stages of wash cycle can not carry out 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 unfavorable, particularly in terms of the operation of pump.
In addition, substantial amounts of foam can be very unfavorable during the main washing stage is in itself, because relative to not having
The detersive efficiency of cleaning solution substantially reduces for the normal condition of foam.
Foam is also possible to cause detergent to accumulate on clothing.A certain amount of residual detergent be present may cause rinsing not
Fully.Rinse insufficient detergent that can cause to leave the allergy and sensitivity response that are adequate to bring about people in clothing.
Known a kind of known method for being used to detect the foam in washing machine from the A2 of EP 1731656.In the publication,
Realize a kind of foam sensor integrated with temperature sensor.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 the shortcomings that overcoming present in prior art.
The present invention primary and foremost purpose be to provide it is a kind of can as needed wash cycle early detection foam presence
Washing machine.
Another primary and foremost purpose of the present invention is to provide a kind of washing machine for the residual on clothing that can reduce detergent.
It is a further object of the present invention to provide a kind of presence that can detect foam as needed and with known type
Washing machine compares the washing machine with the complexity reduced and/or the size of reduction.
It is yet another object of the invention to provide a kind of presence that can detect foam as needed and with known type
Washing machine compares the washing machine with higher reliability.
The content of the invention
It has been discovered by the applicants that the programming rate of the liquid in washing tube by determining washing machine, it may be determined that washing
The presence of foam in bucket.
Therefore, the present invention relates to a kind of method for being used to operate washing machine during wash cycle, the washing machine to include holding
Receive cleaning-drum washing tube and heater for heating the liquid in the washing tube, wherein methods described include with
Lower step：
- a certain amount of water and a certain amount of detergent are introduced into the washing tube to form cleaning solution；
- heating the cleaning solution；
Cleaning solution temperature in-detection washing tube and/or washing tube discharge areas；
- determine programming rate；
- by identified programming rate compared with threshold value, if identified programming rate is more than the threshold value,
It is determined that foam be present.
Preferably, cleaning solution temperature is detected in predetermined monitoring cycle.
Preferably, predetermined monitoring cycle in 20s between 30min, more preferably 1min.
According to the preferred embodiment of the present invention, predetermined monitoring cycle is set in heating stepses.
In a preferred embodiment of the invention, predetermined monitoring cycle is set in the section start of heating stepses.
Preferably, programming rate is determined in predetermined monitoring cycle.
It is highly preferred that programming rate is the average heating speed in predetermined monitoring cycle.
In a preferred embodiment of the invention, threshold value is between 0.1 DEG C/min to 10 DEG C/min, preferably 4 DEG C/
Between min to 8 DEG C/min, more preferably equal to 7 DEG C/min.
According to the preferred embodiment of the present invention, threshold value is related to the type of heater.
Preferably, threshold value is related to the power dissipation of heater.
In a preferred embodiment of the invention, heating stepses perform after the moistening step of wash cycle.
Moistening step, which preferably includes, is introduced into a certain amount of water and a certain amount of detergent in washing tube.
According to the preferred embodiment of the present invention, threshold value is the function of the water.
Preferably, threshold value is directly proportional to the water.
In accordance with another preferred embodiment of the present invention, threshold value is the letter of the power dissipation of the water and heater
Number.
In a preferred embodiment of the invention, cleaning-drum rotates during heating stepses.
Preferably, cleaning-drum rotates during moistening step.
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.
In a preferred embodiment of the invention, foam reduction action includes one in following action：
- relative to wash cycle main washing step the time for reducing main washing step expeced time；
- relative to expection enabling time of the heater of the main washing step of selected circulation reduce heater
Enabling time；
- disable heater；
- heater deactivation is reached the scheduled time；
The regular movements of-change cleaning-drum, it is preferable that relative to when being expected to rotate of main washing step of selected circulation
Between reduce cleaning-drum rotational time；
- relative to one or more additional rinse steps of expection rinse step introducing of selected circulation；
- other water is introduced during main washing step.
In another preferred embodiment of the present invention, foam reduction action includes making cleaning solution move from the bottom of washing tube
The drain step removed and be discharged to the outside.Preferably, clean water is introduced in washing tube to recover after the draining step
Enough cleaning solutions.
According to the preferred embodiment of the present invention, foam reduction action includes sending alert, preferably vision to user
Alarm or audible alarm.
In a preferred embodiment of the invention, washing machine includes the recirculation circuit with recirculation pump, recirculation pump
For liquid to be discharged from the bottom of washing tube, so that the liquid enters another part of washing tube, wherein foam reduces dynamic
Work comprises the following steps：The enabling time of recirculation pump is reduced relative to the expection enabling time of selected circulation.
In another aspect of the present invention, the present invention relates to a kind of washing machine, wherein, the washing machine is provided for above-mentioned
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 a little accompanying drawings：
- Fig. 1 shows the perspective view of the washing machine according to the preferred embodiment of the present invention；
- Fig. 2 shows the schematic front profile according to the washing machine of the preferred embodiment of the present invention；
- Fig. 3 was shown under the first situation according to the preferred embodiment of the present invention in phase period of wash cycle
Between the function as the time one group of example graph；
- Fig. 3 A show the zoomed-in view of Fig. 3 details；
- Fig. 4 shows the period in wash cycle under the second situation according to the preferred embodiment of the present invention
One group of example graph of the function as the time of period；
- Fig. 4 A show the zoomed-in view of Fig. 4 details；
- Fig. 5 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. 6 shows Fig. 2 another 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 washing dryers.
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 accommodates porose washing rolling
The washing tube 3 of cylinder 4, pending clothing can be loaded in the 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 preferably hangs in floating manner to be connected in casing 2, advantageous by unshowned multiple spiral shells herein
Rotation spring and damper carry out outstanding connect.
Advantageously, cleaning-drum 4 is rotated by sightless electro-motor, wherein it is preferred to, electro-motor is advantageously borrowed
Help the axle that unshowned abelt-pulley system transmits rotary movement to cleaning-drum 4.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 suitable for water and washing/rinse products (i.e. detergent, softening agent etc.) are fed to washing tube 3.Enter the control of water loop 5 to come
From the introducing of outside supply line E (hereinafter referred to as water service device E) water.
Product feeding unit 6, which preferably includes, is provided with removable drawer 6, the drawer carry be suitable to washing and/or
The various compartments of rinse products filling.
In embodiment as described herein, fed water into by making water flowing by drawer 6 and through supply pipe 9
In washing tube 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
A product in product, or these water can be clean, and in this case, its can bypass drawer 6 every
Between 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.
Advantageously, washing machine 1 includes drainage system 15.
Advantageously, drainage system 15 includes draining pump 16, washing tube 3 is connected to the first pipe 17 and the end of draining pump 16
The outlet 18 terminated in outside casing 2.Drainage system 15 is applied to liquid --- for example filthy water or it is mixed with washing and/or rinsing
The water of product --- it is discharged to the outside from washing tube 3.
Preferably, drainage system 15 includes the filter being located between the bottom of washing tube 3 and draining pump 16 (in figure not
Show), and the filter is suitable to block and has already passed through hole on the surface of cleaning-drum 4 or rolled when in washing
All undesirable objects fallen when being shifted between cylinder 4 and washing tube 3 on the bottom of washing tube 3 (such as have been detached from clothing
Button, be strayed into coin of washing machine etc.), the undesirable object may damage or block draining pump 16.
Preferably, the mistake can be removed by the door 14 on the antetheca or rear wall of the casing 2 for being advantageously located at washing machine 1
Device is filtered, and is then for example cleaned；, can be for example via cleaning-drum 4 in unshowned another embodiment
Inside is come close to filter, for example, by be arranged in cleaning-drum 4 selectively closed off by suitable lid it is appropriate
Opening to approach filter close to filter, or by the removable lifter (lifter) of cleaning-drum 4.
Advantageously, washing machine 1 includes the device 19 for being suitable to the water level inside sensing (or detection) washing tube 3.
Device 19 preferably includes the pressure sensor of the pressure in sensing washing tube 3, and pressure value is with being included in washing tube 3
In table it is related.In another unshowned embodiment, washing machine 1 includes (being additional to pressure sensor or replacing
Change pressure sensor) it is suitable to liquid level sensor (such as the machinery, electromechanical, light of water level in sensing (or detection) washing tube 3
Learn etc.).
Advantageously, washing machine 1 includes being suitable to adding for the liquid in washing tube 3 is contacted and heated with the liquid in washing tube 3
Thermal 20.
Heater 20 --- be preferably resistor --- be preferably arranged in it is unshowned positioned at the bottom of washing tube 3 or
In suitable base in the discharge areas of washing tube 3.
Preferably, washing machine 1 includes being used for the temperature sensor 21 for sensing the fluid temperature in washing tube 3.
Here in shown preferred embodiment, temperature sensor 21 is preferably integrated with heater 20, i.e., they
Supported by common housing.
In various embodiments, temperature sensor can be located at the temperature for the liquid being adapted to detect in washing tube 3
Other suitable positions.
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 is preferably coupled into water loop 5, drainage system 15, electro-motor, and control loop 22 from being arranged on washing machine 1
On various sensors --- for example enter the flowmeter of water loop 5, (or the liquid level of pressure sensor 19 positioned at the bottom of washing tube 3
Sensor), temperature sensor 21 etc. --- receive information,.
Especially, the temperature that temperature sensor 21 detects preferably continuously is received and according to the present invention by control unit 22
It is advantageously used, what following article preferably described.
Alternatively, when needed, the temperature detected by temperature sensor 21 is obtained with the scheduled time by control unit 22
Degree.
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 from time to time, particularly desired washing procedure.By user's selection
Washing procedure is by corresponding to the corresponding wash cycle performed by washing machine.Generally, user can be optionally added into other specification,
Such as load in terms of the weight of wash temperature, dewatering speed, laundry item etc..Interface unit 50 preferably includes display machine
Working condition or other information display.
Based on the parameter obtained by the interface unit 50, control unit 22 sets and controls each portion of washing machine 1
Divide to perform desired wash cycle.
Temperature sensor 21 is arranged to be used for detecting the temperature of the liquid in washing tube 3 or in the discharge areas of washing tube 3
Degree.
According to the favourable aspect of the present invention, temperature sensor 21 is used to determine washing during the heating period of wash cycle
It whether there is foam and/or foam volume in the discharge areas of bucket 3 and/or washing tube 3.
Preferably during heating the liquid in washing tube 3, temperature sensor 21 is being utilized by enabling heater 20
Detect the temperature WT of the cleaning solution in washing tube 3 or in the discharge areas of washing tube 3.Then, according to the value detected come really
Fixed --- preferably being determined by control unit 22 --- cleaning solution temperature WT ramp-up rate TS.
Advantageously, if programming rate TS is more than threshold value TV, it is determined that the discharge in washing tube 3 and/or in washing tube 3
Foam and/or a large amount of foams in region be present.
If programming rate TS is less than or equal to threshold value TV, it is detected as only existing water or a small amount of foam.
Preferably, if programming rate TS is more than threshold value TV during predetermined monitoring cycle Δ t, it is determined that in washing tube 3
In and/or foam and/or a large amount of foams be present in the discharge areas of washing tube 3.
If programming rate TS is less than or equal to threshold value TV in monitoring cycle Δ t, it is detected as only existing water or a small amount of
Foam.
Especially, determination can be made in a case where：If average heating speed ATS is big in monitoring cycle Δ t
In threshold value TV, i.e. if：
ATS=Δ T/ Δs t>TV
Or
Wherein, ti is wash temperature WT monitoring cycle Δ t initial time and tf is wash temperature WT monitoring week
Phase Δ t end time.
According to another favourable aspect of the present invention, if it have detected that foam in washing tube 3 be present, then preferably hold
Row hereafter acts one or more foam reductions preferably described.
Fig. 3 shows phase period in wash cycle under the first situation according to the preferred embodiment of the present invention
Between schematically scheme as one group of function of time.
First situation corresponds to the correct operating state of wash cycle, i.e., does not form foam in washing tube 3.
Figure 3 illustrates wash cycle in t=0s to the period between t=4500s.The period, which corresponds to, washes
The starting stage of circulation is washed, particularly soaks stage (t0-t1) and main washing stage (t1-t4).
During the wetting stage, i.e., in t0=0s extremelyBetween, preferably by entering water loop 5 and product
The detergent of certain water Qw water and certain detergent amount Qd is introduced into washing tube 3 by feeding unit 6.In the wetting phase in stage
Between, water and detergent are introduced into washing tube 3 to form the cleaning solution for being used for washing clothing.
During the wetting stage, cleaning-drum 4 is advantageously set to be rotated with preferable regular movements, such as along clockwise and/or inverse
Clockwise, there is stopping interval with low speed (for example, speed with 10-300rpm) and advantageously between successive rotation
Time.
Liquid level 44 in the washing tube 3 consequently, preferably detected by pressure sensor 19 rises to about 100mm from 0mm.
In figure 3, the vibration of the liquid level 44 caused by being rotated because of cleaning-drum in washing tube 3, so liquid level 44
Oscillated around in 100mm.
The liquid level 44 of about 100mm in washing tube 3 is preferably enough heater 20 is completely covered so that heater 20
Advantageously it is totally immersed in liquid.
The cleaning solution temperature WT equally indicated in figure 3 by reference 45 keeps substantial constant in the wetting stage,Corresponding to the temperature of the water from water service device E.
As the first situation shown in Fig. 3 --- the correct operating state of wash cycle, substantially prevented in the wetting stage
The formation of foam.
In the timePlace, main washing stage start.The main washing stage includes the heating period (t1-t2) and protected
Hold the stage (t2-t4).During the heating period, as from can perceiving the drive signal 47 of heater 20, heated in figure 3
Device 20 is activated, and cleaning-drum 4 is rotated with preferable regular movements.By heater 20 during the stage of holding (t2-t4)
Disable, and cleaning-drum 4 is rotated with preferable regular movements.
During the heating period (t1-t2), cleaning solution temperature WT substantial linears rise.Heating period is in the timePlace terminates, and now cleaning solution temperature WT reaches predetermined temperature T2.In the preferred embodiment being shown here at,
Predetermined temperature T2 is set to 40 DEG C, and this corresponds to for example circulates (cotton cycle) by 40 DEG C of cottons of user's selection.
It is same to monitor cleaning solution temperature WT during the heating period (t1-t2).
Especially, within the heating period (t1-t2), programming rate TS is calculated.
Speed TS be will heat up compared with threshold value TV, if programming rate TS is more than threshold value TV, judged in washing tube 3
Foam be present and/or have substantial amounts of foam.Otherwise, it is determined that only exist water or a small amount of foam.
Especially, programming rate TS is calculated in predetermined monitoring cycle Δ t.
In Fig. 3 under normal circumstances, detected during predetermined monitoring cycle Δ t=t1-t3 and only exist water or a small amount of
Foam.The programming rate TS calculated in monitoring cycle Δ t is terminating below or equal to threshold value TV.
Preferably, be consecutively carried out in the successive monitoring cycle within the heating period monitoring to cleaning solution temperature WT and
Calculating to programming rate TS.
It is highly preferred that --- i.e. at time t1 --- it is immediately performed at the beginning to cleaning solution temperature WT's in the heating period
Monitoring and the calculating to programming rate TS.
In various embodiments, one or more monitoring cycles can be distributed in heating period (t1- by different way
T2 in), such as every 2 minutes monitoring cycles of 2 minutes.
Preferably, programming rate TS is calculated as the average heating speed ATS in monitoring cycle Δ t, i.e.,：Reference chart
3A, ATS=(T3-T1)/(t3-t1)=(T3-T1)/Δ t, wherein T3 are the temperature detected at time t3, and T1 be
The temperature detected at time t1.
In various embodiments, programming rate TS can be calculated by different way, such as continuously calculates heating speed
Spend TS (instantaneous velocity).
Monitoring cycle Δ t is preferably set to predetermined value, such as 1 minute (min).
Preferably, predetermined monitoring cycle is between 20s (second) to 30min (minute).
In another embodiment, if for example before monitoring cycle Δ t terminates heater 20 drive signal 47
It is deactivated, then monitoring cycle Δ t can reduce automatically.The driving letter of the above-mentioned heater 20 before monitoring cycle Δ t terminates
Numbers 47 are deactivated and can occur under such as situations below：Cleaning solution temperature WT makes it value --- such as 40 DEG C of cottons
40 DEG C in circulation, or reach maximum safety value.
Programming rate TS threshold value TV is preferably set to predetermined value, such as is set as 7 DEG C/min of fixed value.
Preferably, threshold value is between 0.1 DEG C/min to 10 DEG C/min, more preferably between 4 DEG C/min to 8 DEG C/min.
However, in various embodiments, different settings can be carried out to threshold value TV.
In fact, programming rate TS influenceed by the water Qw being introduced into during the wetting stage in washing tube 3 and/or
By the patterns affect of the heater used in washing machine.Therefore, the water that threshold value TV can preferably with being introduced into washing tube 3
The type for measuring Qw and/or heater is related.
Preferably, threshold value TV can be estimated according to the water Qw being introduced into during the wetting stage in washing tube 3：
TV=f (Qw)
Preferably, threshold value TV is directly proportional to water Qw.
In another preferred embodiment, can be according to the specific water Qw being introduced into during the wetting stage in washing tube 3
To set threshold value TV.Following table is exemplarily illustrated the power of the correlation between threshold value TV and water Qw, wherein resistor 20
Dissipation is given value and equal to 1000 watts：
| Water Qw (liter) | Threshold value TV (DEG C/s) |
| 10 | 3 |
| 14 | 2 |
| 20 | 2 |
Table 1
Threshold value TV can also be preferably to being used in washing machine heater type it is related.
It is highly preferred that threshold value TV can be related to the power dissipation of resistor 20.Following table schematically illustrates threshold value TV
Correlation between the power dissipation of resistor 20, wherein the water Qw being introduced into during the wetting stage in washing tube 3 is
Given value and equal to 10 liters：
Table 2
In another preferred embodiment, threshold value TV preferably with the water Qw that is introduced into washing tube 3 and heater
Both types correlation.
Following table schematically illustrates threshold value TV, the water Qw and the resistance that are introduced into during the wetting stage in washing tube 3
Correlation between the power dissipation of device 20：
Table 3
As described above, the situation shown in Fig. 3 corresponds to the correct operating state of wash cycle, i.e., it is basic in washing tube 3
On do not form foam.Wash cycle after main washing stage (t1-t4) is typically to continue the remaining rank in the circulation
(not shown in Fig. 3) such as section, i.e. rinse stage, equilibrium stage, water smokings.Therefore, it is dynamic to be not carried out foam reduction for wash cycle
Make.
Fig. 4 shows the second situation according to the preferred embodiment of the present invention.
Second situation corresponds to the undesirable running status of wash cycle, i.e., during the wetting stage in washing tube 3
Formed with foam.
Figure 4 illustrates wash cycle in t=0s to the period between t=4500s.The period, which corresponds to, washes
The starting stage of circulation is washed, particularly soaks stage (t0-t1) and main washing stage (t1-t4).
During the wetting stage, i.e., in t=0s extremelyBetween, preferably by entering water loop 5 and product
The detergent of a certain amount of Qw water and a certain amount of Qd is introduced into washing tube 3 by feeding unit 6.During the wetting stage, water and wash
Agent is washed to be introduced into washing tube 3 to form the cleaning solution for being used for washing clothing.
During the wetting stage, cleaning-drum 4 is advantageously set to be rotated with preferable regular movements, such as along clockwise and/or inverse
Clockwise, there is stopping interval with low speed (such as speed with 10-300rpm) and advantageously between successive rotation
Time.
Liquid level 44 in the washing tube 3 consequently, preferably detected by pressure sensor 19 rises to about 100mm from 0mm.
In Fig. 4, the vibration of the liquid level 44 caused by being rotated because of washing tube in washing tube 3, so liquid level 44 exists
100mm is oscillated around.
The liquid level 44 of about 100mm in washing tube 3 is preferably enough heater 20 is completely covered so that heater
20 are advantageously always immersed in liquid.
Cleaning solution temperature WT keeps substantial constant in the wetting stage,Corresponding to from running water
The temperature of feeding mechanism E water.
The second situation shown in Fig. 4 shows the undesirable running status of wash cycle, because in the wetting stage
Period generates a certain amount of foam.
Especially, foam is formed in washing tube 3 due to the rotation of cleaning-drum 4 during the wetting stage, wherein, wash
Wash roller 4 move/agitation is incorporated into cleaning solution in washing tube 3.
In the timePlace, starts the main washing stage.The main washing stage includes initial heat-up stage.This plus
During the hot stage, heater 20 is suitably switched on/off according to specific control method, such as by Fig. 4 from heater
20 drive signal 47 can perceive.Cleaning-drum 4 is equally rotated with preferable regular movements.
Due to foam be present in washing tube 3, so cleaning solution temperature WT is quick since the initial time t1 of heating period
Rise.
According to the favourable aspect of the present invention, cleaning solution temperature WT rapid increase shows in washing tube 3 in the heating period
Foam be present.
As described above, advantageously, cleaning solution temperature WT is monitored during the heating period.
Especially, programming rate TS is calculated in the heating period.
In the current situation, as shown in figure 4, because the programming rate TS calculated is actually greater than threshold value TV, therefore examine
Measure and foam and/or substantial amounts of foam in washing tube 3 be present.
Preferably, --- i.e. at time t1 --- it is immediately performed the meter to programming rate TS at the beginning in the heating period
Calculate, be thus substantially immediately detected in washing tube 3 and foam and/or substantial amounts of foam be present.
Especially, programming rate TS is calculated in predetermined monitoring cycle Δ t.
As shown in Figure 4 A, the presence of foam is detected during predetermined monitoring cycle Δ t=t1-t3.More particularly, rise
Warm speed TS is calculated as the average heating speed ATS in monitoring cycle Δ t, i.e. ATS=(T3-T1)/(t3-t1)=(T3-
T1)/Δt。
Advantageously, detected according to the above method in washing tube 3 and foam be present and perform one or more foams and reduce
Action.
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
Wash the time for reducing the main washing stage expeced time of the main washing stage in circulation.
The main washing stage can be defined as in wash cycle with the next stage：During at this stage, cleaning-drum rotation,
The cleaning solution being contained in cleaning-drum is heated to and/or is maintained at predetermined temperature according to the washing procedure that user selects.
The main washing stage is in wash cycle before rinse stage, equilibrium stage, sequential step the water smoking.
Because the time of main washing stage is reduced, therefore the rotational time of cleaning-drum 4 is equally reduced, and is washed so as to avoid
The liquid in bucket 3 is washed exceedingly to move/stir.Therefore, foam quickly dissolves.
Can be performed after the foam in detecting washing tube 3 another foam reduction action preferably include relative to
The expection enabling time of the heater of the main washing stage of selected circulation reduces the enabling time of heater.This
In the case of, heater can be disabled completely in the remaining time of main washing stage.Again, foam quickly dissolves.
Can be performed after the foam in detecting washing tube 3 another foam reduction action preferably include relative to
The expection rotational time of the main washing stage of selected circulation changes the regular movements of cleaning-drum, preferably reduces cleaning-drum
Rotational time.
The reduction of the rotational time of cleaning-drum avoids the excessive movement/agitation of the liquid in washing tube, therefore foam
Quickly dissolve.
Can be performed after the foam in detecting washing tube 3 another foam reduction action preferably include relative to
The expection rinse stage of selected circulation introduces one or more rinse-added stages.
The dissolving of rinse-added stage enhancing foam and its discharge to outside.
Another foam reduction action that can be performed after the foam in detecting washing tube 3 is preferably incorporated in master and washed
Some extra water are introduced during washing the stage.
Being introduced into extra water reduces the concentration of the detergent in washing tube 3, therefore advantageously reduces caused by foam
Possibility.
Another foam reduction action that can be performed after the foam in detecting washing tube 3, which preferably includes, makes washing
The bleeding 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 are performed and introduce stage and/or one or more bleeding stages.
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 washing.It is introduced into the concentration that clean water reduce further the detergent in washing tube 3.
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
Detergent excess or detergent are used caused by mistake, so foam alarm can be useful for user, because it can be accused
Know how user prevents from forming foam in the laundry wash cycle in future, such as select correct detergent.
Fig. 5 is shown according to the preferred embodiment of the present invention for operating washing machine and in the wash cycle phase
Between detect foam method for simplifying indicative flowchart.
Clothing to be washed is put into (step 100) in cleaning-drum 4 first.
User selects desired washing procedure (step 110) by operate interface unit 50.
(step 120) in the next step, start the wash cycle of the washing procedure selected according to user.As in next step
Suddenly (step 130), the wetting stage is this method provide, in the wetting stage, preferably supplies list by entering water loop 5 and product
The detergent of a certain amount of Qw water and a certain amount of Qd is introduced into washing tube 3 to form the cleaning solution for being used for washing clothing by member 6.
During the wetting stage, cleaning-drum 4 is advantageously rotated with preferable regular movements.
At scheduled time t1, preferably stage (step 140) is begun to warm up by enabling heater 20.
Since time t1 and duration of Δ t=1min, washing tube 3 is preferably monitored by temperature sensor 21
In cleaning solution temperature WT.
At the end of monitoring cycle Δ t, programming rate TS is calculated, or preferably calculate average heating speed ATS (steps
150).If programming rate TS has a value (step 160 place export "No") less than or equal to threshold value TV, this method generally with
Continue main washing stage (step 170) according to the step of selected wash cycle.
For example, make heater 20 keep enable state up to more than 10 minutes (steps 172), and make cleaning-drum 4 with
Preferable regular movements rotation (step 174).
Main washing stage (step 170) continues scheduled time slot, such as 60 minutes.
Then, wash cycle advantageously carries out one or more rinse cycles (step 180 and 190), in rinse cycle
Period, clean washings are added into clothing and cleaning-drum rotation is with extraction water outlet and dirty particle/washing from clothing
Agent：The filthy water extracted is discharged to the outside from washing tube 3.
Wash cycle terminates at last water smoking (step 200).
Once wash cycle is over, in the case of clothes washer-dryer, baking stage can also be preferably carried out.
Step 160 is returned to, if programming rate TS or average heating speed ATS has the value (step more than threshold value TV
160 output "Yes"), then the main washing stage is changed by preferable foam reduction action.
For example, disabling heater 20, and cleaning-drum 4 is set no longer to rotate (step 176) and predetermined hold-time example
Such as 10min.
It is then advantageous to ground, this method continues two successive rinse cycles (step 177 and 178), wherein, floating
Clean washings are added into clothing during washing circulation and liquid is discharged to outside from washing tube 3.
Then, wash cycle advantageously proceeds with one or more rinse cycle (step 180 and 190) and most
Whole water smoking (step 200).
Fig. 6 shows the structural change of washing machine 200, and basis is advantageously performed in the structural change of washing machine device 200
The method of the present invention.
The feature and/or part corresponding with Fig. 2 washing machine 1 is indicated by the same numbers.
What washing machine 200 included being provided with recirculation circuit 216 goes out water loop 215, and the recirculation circuit 216 is suitable to liquid
Body is discharged from the bottom of washing tube 3 and these liquid is reentered in another part of washing tube 3, preferably enters washing
The upper area of bucket 3.Recirculation circuit 216 includes recirculation pump 217 and recirculation pipe 61.Recirculation pipe 61 terminates at washing tube
End nozzle 61a in 3 upper area.
Draining pump 16 and recirculation pump 217 are preferably arranged in the downstream of public filter 218.
Draining pump 16 and recirculation pump 217 are suitably controlled by control unit 22, so that can pass through outlet conduit
18 outwards discharge and/or by the row of recirculation pipe 61 to washing tube 3.
Operation and foam that the washing machine 200 is performed as advantageously as described by above for first embodiment
Detection.
Previously described foam reduction action can also be advantageously performed in the washing machine 200.
Another foam reduction action that can be performed after foam in the washing tube 3 in detecting the washing machine 200
The expection enabling time relative to selected circulation is preferably included to change/reduce the enabling time of recirculation pump 217.This
Enhance the faster dissolving of foam.
Advantageously, the method according to the invention makes it possible to the early stage in wash cycle --- preferably in the wetting stage
At the end of just --- detection foam.
Therefore, can since wash cycle most just perform foam reduction action.For known method, this has
Help reduce accumulation of the detergent on clothing.
Advantageously, moreover the detection of foam is carried out by the temperature sensor being typically mounted in washing machine, without
Install and control special foam sensor.
Therefore, method of the invention makes it possible to have what is reduced compared with the washing machine of the detection foam of known type
Foam is detected in the washing machine of complexity and/or size.
Therefore, compared with the washing machine of the detection foam of known type, the washing machine for performing the method for the present invention has more
High reliability.
Advantageously still, the method according to the invention ensure be arranged on washing machine in be used for liquid is discharged from washing tube
Pump more accurate operation because this method substantially avoid has foam in the porch of the pump.This transfers to reduce
As the noise caused by the pump to be worked with foam.
Advantageously, spilling of the excessive and liquid from washing tube is reduced or avoided in the method according to the invention.
Accordingly, it has been shown that the present invention allows for the purpose of all settings.Especially, the present invention can provide with
Known system compares the washing machine and method of more effective foam detecting system.
, it is emphasized that be shown in the drawings and as a reference to some embodiment party of description the method according to the invention
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 in the illustrated embodiment of the present invention, with after the wetting stage when being generally in wash cycle and starting
Apply this method exemplified by the heating period of phase, but it is to be understood that the invention is not restricted to those accurate embodiments and
Any heating period that this method can apply in wash cycle.
Although the illustrated embodiment of the present invention is described with reference to the accompanying drawings herein, but it is to be understood that the present invention
Be not limited to those accurate embodiments, and those skilled in the art can realize various other changes and modification wherein and
Without departing from the scope or spirit of the invention.All such changes and modification 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 operate washing machine (1 during wash cycle；200) method, the washing machine include accommodating washing
The washing tube (3) of roller (4) and the heater (20) for heating the liquid in the washing tube (3), wherein, the side
Method comprises the following steps：
- a certain amount of water and a certain amount of detergent are introduced into the washing tube (3) to form cleaning solution；
- heating the cleaning solution；
Cleaning solution temperature (WT) in-detection washing tube (3) and/or in the discharge areas of the washing tube (3)；
- determine programming rate (TS)；
- by identified programming rate (TS) compared with threshold value (TV), and if identified programming rate (TS) is big
In the threshold value (TV), it is determined that foam be present.
2. according to the method for claim 1, wherein, with predetermined monitoring cycle, (Δ t) detects the cleaning solution temperature (WT).
3. according to the method for claim 2, wherein, the predetermined monitoring cycle (Δ t) in 20s between 30min, preferably
Ground is 1min.
4. according to the method in claim 2 or 3, wherein, (Δ t) is set in the heating stepses to the predetermined monitoring cycle
It is interior.
5. the method according to any one of claim 2 to 4, wherein, (institute is determined in Δ t) in the predetermined monitoring cycle
State programming rate (TS).
6. according to any method of the preceding claims, wherein, the threshold value (TV) 0.1 DEG C/min to 10 DEG C/
Between min, preferably between 4 DEG C/min to 8 DEG C/min, more preferably equal to 7 DEG C/min.
7. according to any method of the preceding claims, wherein, profit of the heating stepses in the wash cycle
Performed after wet step.
8. according to the method for claim 7, wherein, the moistening step is included the water of a certain amount of (Qw) and a certain amount of
(Qd) detergent is introduced into the washing tube (3).
9. according to the method for claim 8, wherein, the threshold value (TV) is the water (Qw) function (f (Qw)).
10. according to any method of the preceding claims, wherein, the cleaning-drum (4) is in the heating stepses
Period rotates.
11. the method according to any one of claim 7 to 10, wherein, the cleaning-drum (4) is in the moistening step
Period rotates.
12. 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.
13. according to the method for claim 12, wherein, the foam reduction action includes one of following action：
- relative to the wash cycle main washing step the time for reducing the main washing step expeced time；
- filled relative to the expection enabling time reduction heating of the heater (20) of the main washing step of selected circulation
Put the enabling time of (20)；
- disable the heater (20)；
- heater (20) deactivation is reached the scheduled time；
- change cleaning-drum regular movements, it is preferable that reduced relative to the expection rotational time of the main washing step of selected circulation
The rotational time of the cleaning-drum；
- relative to one or more rinse-added steps of expection rinse step introducing of selected circulation；
- other water is introduced during the main washing step.
14. the method according to claim 12 or 13, wherein, the washing machine (200) includes having recirculation pump (217)
Recirculation circuit (216), the recirculation pump (217) be used for liquid is discharged from the bottom of the washing tube (3) and makes institute
Another part that liquid reenters the washing tube (3) is stated, wherein, the foam reduction action comprises the following steps：Relatively
The enabling time of the recirculation pump (217) is reduced in the expection enabling time of selected circulation.
A kind of 15. washing machine (1；200), wherein, the washing machine (1；200) it is suitable to appoint using according in claim 1 to 14
Method described in one.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP16166319.0A EP3235939B1 (en) | 2016-04-21 | 2016-04-21 | Method for the detection of foam in a laundry washing machine |
| EP16166319.0 | 2016-04-21 |
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| CN107385769A true CN107385769A (en) | 2017-11-24 |
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| CN201710197503.6A Active CN107385769B (en) | 2016-04-21 | 2017-03-29 | Method for detecting bubbles in washing machine |
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| EP (1) | EP3235939B1 (en) |
| CN (1) | CN107385769B (en) |
Cited By (2)
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| CN111850961A (en) * | 2019-04-17 | 2020-10-30 | 博西华电器（江苏）有限公司 | Washing machine and foam detection method and device thereof |
| CN112941806A (en) * | 2021-01-29 | 2021-06-11 | 珠海格力电器股份有限公司 | Washing machine, foam quantity prediction method and device thereof and electronic equipment |
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| AU2017203834B2 (en) * | 2016-06-08 | 2019-10-03 | Lg Electronics Inc. | Laundry treatment apparatus and method of controlling the same |
| CN110485107A (en) * | 2018-05-15 | 2019-11-22 | 青岛海尔洗衣机有限公司 | Washing machine scalds control method |
| CN110735284B (en) * | 2018-07-18 | 2023-06-20 | 青岛海尔智能技术研发有限公司 | Washing machine and laundry control method thereof |
| CN111074481B (en) * | 2020-01-08 | 2024-03-12 | 青岛海尔洗衣机有限公司 | Detergent delivery method for washing equipment |
| 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 |
| CN112941818B (en) * | 2021-01-25 | 2023-04-07 | 珠海格力电器股份有限公司 | Washing machine control method and device, storage medium and washing machine |
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| CN107385769B (en) | 2021-06-29 |
| EP3235939B1 (en) | 2021-06-09 |
| EP3235939A1 (en) | 2017-10-25 |
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