CN104233700A - Washing machine control method and washing machine - Google Patents

Washing machine control method and washing machine Download PDF

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Publication number
CN104233700A
CN104233700A CN201310232159.1A CN201310232159A CN104233700A CN 104233700 A CN104233700 A CN 104233700A CN 201310232159 A CN201310232159 A CN 201310232159A CN 104233700 A CN104233700 A CN 104233700A
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China
Prior art keywords
rinsing
washing machine
conductivity
water
setting
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CN201310232159.1A
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Chinese (zh)
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CN104233700B (en
Inventor
黄振兴
许升
陈玉玲
邓金柱
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Qingdao Haier Washing Machine Co Ltd
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Haier Group Corp
Qingdao Haier Washing Machine Co Ltd
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    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F33/00Control of operations performed in washing machines or washer-dryers 
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F34/00Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14Arrangements for detecting or measuring specific parameters
    • D06F34/22Condition of the washing liquid, e.g. turbidity
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08Liquid supply or discharge arrangements
    • D06F39/083Liquid discharge or recirculation arrangements
    • D06F2212/00

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)

Abstract

The invention discloses a washing machine control method and a washing machine. The washing machine is provided with a turbidity sensor for detecting water turbidity and a conductivity sensor for detecting water conductivity. According to the washing machine control method, conductivity of clear water is detected before washing is carried out, conductivity and a turbidity value of rinsing water are detected at the same time at every rinsing stage after washing is carried out, a conductivity variable quantity is calculated according to the measured conductivity of clear water and conductivity of rinsing water, and rinsing is stopped when the turbidity value and the conductivity variable quantity are both lower than the corresponding set threshold value. During every rinsing, the washing machine can automatically detect and calculate turbidity of rinsing water and conductivity changes of rinsing water, judge whether clothes are rinsed clean according to turbidity and conductivity changes of rinsing water and stop working in time after the clothes are rinsed clean to save water and electricity. The washing machine can automatically add rinsing frequency if the washing machine detects that the clothes are not rinsed clean when the rinsing frequency reaches the set value, so that residual stains, detergents and softeners are reduced, and the purpose of healthy laundry is achieved.

Description

A kind of control method for washing machine and washing machine
Technical field
The present invention relates to washing machine field, especially a kind of employing turbidity simultaneously and electrical conductivity detect realization and clean the control method for washing machine and washing machine that namely stop.
Background technology
Along with the development of the universal of washing machine and control technology, more intelligentized washing machine comes out gradually, how while clean clothes, to reduce the residual of washing agent and can accomplish water and electric saving, is one of focus of paying close attention to of consumer always.
Traditional washing machine, otherwise no matter clothes dirty or the washing powder that adds number be fixedly installed wash time and rinsing times; Only detect the degree of fouling of laundry water to judge wash time and rinsing times, and ignore the residual of the washing additives such as washing agent, washing powder, softener, fixing wash time, no matter wash residual how many all equally washing and the rinsings of additive.If the additive added is too much, drift may be caused not wash clean, clothes has residual, human body is damaged; If add less additive, the phenomenon that washing is unclean, waste water may be caused; Equally, if only simply judge the degree of fouling of clothing, and do not judge the residual of additive, clothing also may be caused not have rinsed clean, and additive has residual, damages equally to human body.And by adding the detection of additive, just rinsing times can well be revised, that really accomplishes to wash is clean, that floats is clean, healthy laundry mode is brought to user, so, how to detect whether additive has exactly residual, residual quantity is how many, is the necessary condition ensureing that additive is not residual.
Usually, various sensor is installed in washing machine to detect the wash conditions of several washing operation necessity.Washing machine suitably drives to obtain maximum clean result according to the wash conditions detected.With regard to the sensor of current washing machine, one for detecting the level sensor of the amount of the slurry entered in cylindric washer, one for detecting the temperature sensor whether washed clothing dries, one for detecting the dirty degree of washings, thus revise the turbidity transducer of wash time, and the conductivity sensor for calculating slurry hardness has been suggested and has been used.
But along with people are to healthy and that clothing is comfortable requirement, the kind of research washing additive gets more and more, and also require more and more higher to washing procedure, different additives is applicable to the clothing of unlike material.High but the solution that ion concentration is low of the water-soluble rear formation turbidity of most spots, the general water-soluble rear formation turbidity of washing powder and all higher solution of ion concentration, low but the solution that ion concentration is high of the water-soluble rear formation turbidity of most washing agent meta-alkalescences, the also high but solution that ion concentration is low of the water-soluble rear formation turbidity of some fabric softener (softener), also have small part washing agent in neutral, also can not damage skin even if slightly residual.
Traditional use in washing machine turbidity transducer can detect the degree of fouling of washings, judges clothing whether washes clean, although some improves, also can be used for judging whether rinsed clean, be inaccurate.Such as: application number be 200710084288.5 Chinese patent disclose a kind of laundering process, particularly clothing and clean the method for namely stopping, comprising: enter clear water; Computer board reads in turbidity transducer measured value A; Enter washing, before washing terminates, read in measured value B; Continue washing to setting-up time, computer board reads in measured value C; B-C=D; If D is less than K, then carry out rinsing; If D is greater than K, then proceeds to wash and read in measured value and contrast, the difference of the numerical value to the last read in for twice is less than K.K is the clean angle value of setting; Rinsing, to setting-up time, reads in turbidity transducer measured value E; A-E=F, if F is less than H, then carries out dewatering and terminating; If F is greater than H, then proceed rinsing, until the F that E and A compares acquisition is less than H, H is the rinsing angle value preset.
But in said structure, because turbidity transducer detects according to light transmittance, if use the turbidity transducer transmitter unit of long period and receiving element surface to be blocked by dirt, then to the insensitive also inaccuracy of the judgement of light refraction; And after washing machine uses at every turn, koniology or washings spot are attached to the dirt that turbidity transducer surface is formed, when washing next time, just entered clear water and can not dissolve immediately and the dirt cleaning turbidity transducer surface, the clear water turbidity now measured is inaccurate; In addition, the method adopting above-mentioned turbidity transducer to detect can only be more accurate to the detection of washing powder, to the detection of washing agent, because turbidity transducer error is comparatively large, can not realize the washing agent residue detection of rinse stage completely.
And traditional use in washing machine hardness transducer can only detect washing hardness of water, the dirty of washings cannot be judged.In view of this special proposition the present invention.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the deficiencies in the prior art, and provide one to adopt turbidity and electrical conductivity detection to make range of application is wider, detection is more accurate, judge control method for washing machine more accurately simultaneously.
Another object of the present invention is to provide adopt and detect above by turbidity and electrical conductivity the washing machine judging to clean control method.
For solving the problems of the technologies described above, the present invention adopts the basic conception of technical scheme to be: a kind of control method for washing machine, clear electrical conductivity of water is first detected before washing, after washing, each rinse stage detects rinsing electrical conductivity of water again and detects turbidity value simultaneously, according to the clear water electrical conductivity measured and washings Conductivity Calculation conductivity variations amount, when setting threshold value all lower than correspondence of turbidity value and conductivity variations amount, stop rinsing.
Further, each rinsing starts timing, and when reaching setting-up time t0, start to detect this rinsing electrical conductivity of water and turbidity value, the washing procedure that setting-up time t0 is selected according to user by washing machine control panel is determined.
Further, each rinsing detects a rinsing electrical conductivity of water and turbidity value, and setting-up time t0 is a time point in 0-5 minute before each rinsing terminates.
Further, when turbidity value and conductivity variations amount have at least one to be more than or equal to the setting threshold value of its correspondence, after then completing this rinsing, enter rinsing next time, judge whether next rinsing reaches the rinsing times of setting, if, then directly terminate rinsing, if not, then turbidity value and the washings electrical conductivity of washings is measured, to judge whether rinsed clean.
Further, the rinsing times of setting is acquiescence rinsing times corresponding to washing procedure selected, or is the rinsing times of user's setting, or be the rinsing times of user's direct increase on the acquiescence rinsing times basis that each washing procedure is corresponding, preferably, the rinsing times of increase is 2 ~ 3 times.
Or, further, when turbidity value and conductivity variations amount have at least one to be more than or equal to the setting threshold value of its correspondence, after then completing this rinsing, enter rinsing next time, until when rinsing detects setting threshold value all lower than correspondence of turbidity value and conductivity variations amount, stop rinsing.
Control method for washing machine of the present invention, key step is:
A, beginning, enter clear water to setting clear water water level L1;
B, detect clear electrical conductivity of water K0;
C, enter washings to setting water level L2;
D, washing, to washing end;
E, draining, dry;
F, water inlet, to setting rinsing water level L3, start first time rinsing;
G, rinsing timing, to setting-up time t0, judge whether rinsing times reaches setting value X time, if so, then enters step I; If not, then turbidity value N and the washings electrical conductivity K1 of this rinsing is measured;
H, calculate conductivity variations amount △ K according to the clear water electrical conductivity K0 measured and washings electrical conductivity K1, judge whether turbidity value N and conductivity variations amount △ K meets N < N ' and △ K < K ', wherein, N ' is the turbidity threshold value of setting, K ' is the conductivity variations amount threshold value of setting, if so, then step I is entered; If not, then increase a rinsing, after water inlet, enter step g;
I, rinsing program terminate, draining, enter dehydration procedure to terminating.
Further, turbidity threshold value N ' setting range is 50 ~ 120NTU, preferably 80NTU; Conductivity variations amount threshold k ' setting range is 50 ~ 100 μ S/cm, preferably 80 μ S/cm.
Further, water level L2, rinsing water level L3 are set according to laundry amounts by user or are determined after clothing automatic Weighing by washing machine.
Washing machine of the present invention is provided with the turbidity transducer detecting water chaotic degree and the conductivity sensor detecting water conductivity; Further, this turbidity transducer and conductivity sensor are located in drainpipe.Preferably, turbidity transducer and conductivity sensor become one, drainpipe comprise washing machine be connected with water discharge outlet in run in water pipe and lead to the external connection row water pipe of washing machine outside, both are connected by draining valve and/or draining pump, and turbidity transducer and conductivity sensor run in water pipe in being located at.
When entering clear water, clear water will exceed the position of turbidity, conductivity sensor, and run in preferably filling water pipe.
After adopting technique scheme, the present invention compared with prior art has following beneficial effect.
The present invention, by detecting turbidity and the electrical conductivity of laundry water, just can detect that whether rinsing is clean, thus it is residual accurately to judge whether washing agent, washing powder, softener, spot have.Expand detection range, bring healthy laundry mode to user.
The present invention utilizes conductivity sensor to detect clear water before washing starts, and avoids the inaccurate problem of detection that turbidity transducer causes due to surface smut, with turbidity transducer with the use of, make detect judge more accurate.
The present invention stops in time after laundry of washing machine rinsed clean, reaches the effect of water saving, economize on electricity, and also can not need when using automatic washing machine the number of times artificially setting rinsing for some user.
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is washing machine schematic diagram of the present invention;
Fig. 2 is control method for washing machine flow chart of the present invention.
Detailed description of the invention
Whether washing machine of the present invention can detect rinsing clean, and whether spot, washing agent, washing powder, softener remain, and by detecting electrical conductivity of water and turbidity value, judges whether laundry additive has residual.
As shown in Figure 1, washing machine of the present invention comprises: the parts such as casing 1, urceolus 2, inner core 3, water inlet system 4, computer board controller 5, door closure 6, drainage system 7, motor driver 8.Described water inlet system 4 comprises: prewashing valve 41, master wash valve 42, prewashing water inlet pipe 43, lead and wash water inlet pipe 44, detergent box 45, water supply hose 46.Prewashing valve 41 is connected by the cavity of prewashing water inlet pipe 43 with detergent box 45, laundry additive can not be thrown in the cavity of detergent box 45, be connected with urceolus 2 by water supply hose 46, be the prewashing water inlet path of washings, enter clear water directly in urceolus 2.Main valve 42 of washing is washed water inlet pipe 44 be connected with the interpolation chamber of detergent box 45 by main, and adding in chamber can the laundry additive such as putting detergent, washing powder, softener, and the master for washings washes into water path.Described drainage system 7 comprises: the water pipe 71 that inside runs in, draining pump 72, external connection row water pipe 73.Inside run in water pipe 71 and turbidity, electrical conductivity detecting sensor 9 and level sensor 10 are installed, be respectively used to detect washings turbidity, ion concentration and liquid level.Preferably, turbidity transducer and conductivity sensor become one.
As depicted in figs. 1 and 2, during washing clothes, after user's start-up routine, washing machine computer version controller opens prewashing valve 41 enters clear water, and clean running water is entered in urceolus 2 by the cavity of prewashing water inlet pipe 43, detergent box 45, water supply hose 46 successively.When water level reaches clear water water level L1, startup turbidity, conductivity sensor detect clear electrical conductivity of water K0.Then close prewashing valve 41, open master and wash valve 42, running water is washed water inlet pipe 44, detergent box 45 and water supply hose 46 through master successively and is passed in urceolus 2 by the water containing washing agent.After reaching the water level L2 of setting, close main valve 42 of washing and stop intaking and entering the washing stage.After washing terminates, draining dries and enters rinse stage, stops water inlet, carry out rinsing and start rinsing timer starting timing after water level reaches rinsing water level L3; When rinsing reaches setting-up time t0, first judge rinsing times whether than many X time of setting value, if so, then directly terminate rinsing, draining terminates program after drying; If not, start turbidity, conductivity sensor, measure now turbidity and electrical conductivity voltage signal N, K1, calculate the variable quantity absolute value △ K of now electrical conductivity and clear water electrical conductivity according to K0, K1.If turbidity value N is less than the turbidity threshold value N ' of setting and the variable quantity △ K of electrical conductivity is less than the conductivity variations amount threshold k of setting ' time, show clothing rinsed clean, directly terminate rinsing, draining terminates program after drying; If condition does not meet, then draining dries an increase rinsing, and total rinsing times is no more than X time of user's setting value.
Said process, when entering clear water, clear water water level L1 will exceed the position of turbidity, conductivity sensor 9, and run in preferably filling water pipe 71; Water level L2, rinsing water level L3 are set according to laundry amounts by user or are determined after clothing automatic Weighing by washing machine; The washing procedure that the setting-up time t0 that rinse cycle detects is selected according to user by washing machine control panel is determined.
Wherein, the turbidity threshold value N ' setting range of setting is 50 ~ 120NTU, preferably 80NTU; Conductivity variations amount threshold k ' setting range is 50 ~ 100 μ S/cm, preferably 80 μ S/cm.
Above-mentioned washing process, when turbidity value and conductivity variations amount meet impose a condition time, rinsing is continued by increasing rinsing times, rinsing is continued in the scope of setting rinsing times, setting value is the rinsing times of the increase that user is arranged on the acquiescence rinsing times basis that each washing procedure is corresponding, preferably, the rinsing times of increase is 2 ~ 3 times.
Or, when turbidity value and conductivity variations amount do not meet impose a condition time, then after completing this rinsing, enter rinsing next time, until when rinsing detects setting threshold value all lower than correspondence of turbidity value and conductivity variations amount, stop rinsing.This process in order to avoid rinsing time long, or the rinsing endless loop that other special circumstances cause, also can set rinsing total time, reach setting-up time and then directly terminate rinsing program.
Washing machine of the present invention can be roller washing machine also can be rotary drum washing machine, when each rinsing, washing machine is detection computations washings turbidity and conductivity variations all automatically, and judges clothing whether rinsed clean according to this, can stop in time after clothing rinsed clean, realize water-saving and electricity-saving.If rinsing times reaches setting value, but clothing rinsed clean not yet detected, washing machine can increase rinsing times automatically, reduces the residual of spot, washing agent and softener, reaches the object of healthy laundry.
Embodiment in above-described embodiment can combine further or replace; and embodiment is only be described the preferred embodiments of the present invention; not the spirit and scope of the present invention are limited; under the prerequisite not departing from design philosophy of the present invention; the various changes and modifications that in this area, professional and technical personnel makes technical scheme of the present invention, all belong to protection scope of the present invention.

Claims (10)

1. a control method for washing machine, it is characterized in that: before washing, first detect clear electrical conductivity of water, after washing, each rinse stage detects rinsing electrical conductivity of water again and detects turbidity value simultaneously, according to the clear water electrical conductivity measured and washings Conductivity Calculation conductivity variations amount, when setting threshold value all lower than correspondence of turbidity value and conductivity variations amount, stop rinsing.
2. a kind of control method for washing machine according to claim 1, it is characterized in that: each rinsing starts timing, when reaching setting-up time t0, start to detect this rinsing electrical conductivity of water and turbidity value, the washing procedure that setting-up time t0 is selected according to user by washing machine control panel is determined.
3. a kind of control method for washing machine according to claim 2, is characterized in that: each rinsing detects a rinsing electrical conductivity of water and turbidity value, and setting-up time t0 is a time point in 0-5 minute before each rinsing terminates.
4. a kind of control method for washing machine according to claim 1, it is characterized in that: when turbidity value and conductivity variations amount have at least one to be more than or equal to the setting threshold value of its correspondence, after then completing this rinsing, enter rinsing next time, judge whether next rinsing reaches the rinsing times of setting, if, then directly terminate rinsing, if not, then turbidity value and the washings electrical conductivity of washings is measured, to judge whether rinsed clean.
5. a kind of control method for washing machine according to claim 4, it is characterized in that: the rinsing times of setting is the acquiescence rinsing times that the washing procedure selected is corresponding, or for user setting rinsing times, or be the rinsing times that user directly increases on the acquiescence rinsing times basis that each washing procedure is corresponding, preferably, the rinsing times of increase is 2 ~ 3 times.
6. a kind of control method for washing machine according to claim 1, it is characterized in that: when turbidity value and conductivity variations amount have at least one to be more than or equal to the setting threshold value of its correspondence, after then completing this rinsing, enter rinsing next time, until when rinsing detects setting threshold value all lower than correspondence of turbidity value and conductivity variations amount, stop rinsing.
7. a kind of control method for washing machine according to claim 1 or 2 or 4, is characterized in that: key step is:
A, beginning, enter clear water to setting clear water water level L1;
B, detect clear electrical conductivity of water K0;
C, enter washings to setting water level L2;
D, washing, to washing end;
E, draining, dry;
F, water inlet, to setting rinsing water level L3, start first time rinsing;
G, rinsing timing, to setting-up time t0, judge whether rinsing times reaches setting value X time, if so, then enters step I; If not, then turbidity value N and the washings electrical conductivity K1 of this rinsing is measured;
H, calculate conductivity variations amount △ K according to the clear water electrical conductivity K0 measured and washings electrical conductivity K1, judge whether turbidity value N and conductivity variations amount △ K meets N < N ' and △ K < K ', wherein, N ' is the turbidity threshold value of setting, K ' is the conductivity variations amount threshold value of setting, if so, then step I is entered; If not, then increase a rinsing, after water inlet, enter step g;
I, rinsing program terminate, draining, enter dehydration procedure to terminating.
8. a kind of control method for washing machine according to claim 7, is characterized in that: turbidity threshold value N ' setting range is 50 ~ 120NTU, preferably 80NTU; Conductivity variations amount threshold k ' setting range is 50 ~ 100 μ S/cm, preferably 80 μ S/cm.
9. adopt a washing machine for described control method as arbitrary in claim 1-8, it is characterized in that, this washing machine is provided with the conductivity sensor of turbidity transducer and the detection water conductivity detecting water chaotic degree.
10. washing machine according to claim 9, is characterized in that, described turbidity transducer and conductivity sensor become one, and is located to connect in washing machine drainage mouth to run in water pipe.
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