CN102199854A - Washing machine - Google Patents

Washing machine Download PDF

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Publication number
CN102199854A
CN102199854A CN 201110076788 CN201110076788A CN102199854A CN 102199854 A CN102199854 A CN 102199854A CN 201110076788 CN201110076788 CN 201110076788 CN 201110076788 A CN201110076788 A CN 201110076788A CN 102199854 A CN102199854 A CN 102199854A
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China
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degree
washing
water
bucket
washing machine
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CN 201110076788
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CN102199854B (en
Inventor
矢泽龙太
小林卓也
高嵜薰
糀幸久
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Panasonic Holdings Corp
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Matsushita Electric Industrial Co Ltd
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Abstract

The invention provides a washing machine, which comprises an outer tub hung inside a tank, an inner tub supported inside the outer tub, an impeller arranged on the inner bottom of the inner tub, a driving part for driving the rotation of the inner tub and the impeller, an inlet valve arranged on the upper part of the tank, a drain pipe communicated with the bottom of the outer tub, a drain valve for discharging the water inside the outer tub via the drain pipe, a feculent degree detection part arranged inside the drain pipe for detecting the feculent degree of the detergent, a conductivity detection part arranged beside the bottom of the outer tub and equipped with a pair of electrodes and a control part for controlling the cleaning process, the rinsing process and the dehydration process. During the washing process, the feculent degree of the detergent is detected by the feculent degree detection part and the conductivity of the detergent is detected by the conductivity detection part. According to the detection results of the feculent degree detection part and the conductivity detection part, the whole process is controlled by the control part. Therefore, the washing process can be effectively controlled and the washing performance is improved.

Description

Washing machine
Technical field
The present invention relates to a kind of washing machine that can carry out control corresponding to the action of process running according to the degree of fouling of cleaning solution.
Background technology
In the washing machine of prior art, passing through of having is provided with the cleaning solution state detection sensor of state that conductivity sensor etc. is used to detect the dirt etc. of cleaning solution in tank, state to the dirt of cleaning solution etc. detects, thus control laundry processes (example wherein can be opened flat 4-187183 with reference to the open communique spy of Japan Patent).
Fig. 6 is in the laundry processes of the existing washing machine that disclosed in the above-mentioned list of references of explanation, degree of fouling and at the schematic diagram of the correlation between the control of the washing process that this degree of fouling carried out.
In Fig. 6, V 1fBe the conductivity V that utilizes the detected wash agitation initial stage of conductivity sensor that is arranged on the outer bucket bottom that includes the washing and dewatering bucket 1Deduct and close on the conductivity V that wash agitation finishes fValue (V afterwards 1-V f=V 1f).Then, washing machine is according to the V in each grade water level 1fValue makes a determination to degree of fouling, and according to degree of fouling, laundry processes is carried out such as the controls such as power that increase and decrease wash time, change current.
In having the washing machine of said structure, the degree of fouling of cleaning solution utilizes the conductivity sensor to measure conductivity and detects, but because there is very big variation in conductivity because of the difference of dirt kind, detect degree of fouling if only rely on conductivity, can there be following problem, that is, the conductivity sensor is if detect in the water that contains salt, and it is big that conductivity will become.Therefore, for washings, can make the serious judgement of degree of fouling, thereby wash enough totally based on sweat dirt etc.Yet for the washings based on dirt etc., even in fact degree of fouling is very serious, the conductivity sensor also can only detect very little conductivity.Therefore, contain the washings of dirt etc., will be judged as the light result of degree of fouling, thereby can not get enough cleanings.
Summary of the invention
Washing machine provided by the invention comprises: be lifted on the outer bucket in the casing; Be supported on the interior bucket in the outer bucket; The impeller of the inner face of bucket bottom in being arranged on; The drive division of bucket or rotation in driving; Be arranged at the water intaking valve on casing top; The drainpipe that is communicated with outer barrel bottom; The draining valve of going out from the draining of outer bucket via drainpipe; Be arranged in the drainpipe and be used to detect the turbidity detection portion of the muddy degree of cleaning solution; Be arranged on the next door, bottom of outer bucket and comprise the conductance test section of pair of electrodes; The control part that washing process, rinse cycle, dehydration are controlled.And, control part has following structure: in washing process, when utilizing turbidity detection portion that the muddy degree of cleaning solution is detected, also utilize the conductance test section that the conductivity of cleaning solution is detected, and, each process is controlled according to the result of determination of turbidity detection portion and conductance test section.
By adopting such control mode, washing machine can be made high-precision judgement to the degree of fouling of clothing, and can keep high-quality laundry performance by setting the time of washing process or rinse cycle rightly.
Description of drawings
Fig. 1 is the longitudinal sectional view of the washing machine in the embodiments of the invention.
Fig. 2 is the circuit block diagram of this washing machine.
Fig. 3 is the schematic diagram of the program from the washing process to the dehydration of the washing machine in the expression embodiments of the invention.
Fig. 4 is the flow chart of the control from the washing process to the dehydration of this washing machine of expression.
Fig. 5 is the matrix diagram of the correlation between the degree of fouling represented of degree of fouling and the conductance (conductivity) of the turbidity representative of the washing machine of expression in the present embodiment.
Fig. 6 illustrates degree of fouling in the laundry processes of washing machine in the past and at the figure of the correlation between the control of the washing process that this degree of fouling carried out.
The specific embodiment
Come with reference to the accompanying drawings specific embodiments of the invention are elaborated.Wherein,, only will compile identical symbol, no longer carry out literal repeat specification for identical parts in structure and the background technology.Need to prove that technical scope of the present invention is not subjected to the qualification of these embodiment.
(embodiment)
Fig. 1 is the longitudinal sectional view of the washing machine in the embodiments of the invention, and Fig. 2 is the circuit block diagram of this washing machine.
In Fig. 1, the inside of casing 41 is provided with an outer bucket 43 that utilizes a plurality of suspension members 42 flexiblely lifting, the vibration when suspension member 42 is used for absorption dewatering.Bucket 43 inside is provided with an interior bucket 44 that can be 45 that rotates around the washing/dehydrating axle of hollow dual structure, be used for accommodating laundry and oven dry object outside.Inner face bottom rotation at interior bucket 44 is provided with an impeller 46 that is used to stir clothing and oven dry object freely.
Play the passage 44a of osculum effect and double as ventilation usefulness when on the inner circumferential wall of interior bucket 44, offering a plurality of the dehydration, above interior bucket 44, fluid balance ring 47 is set.Be installed in the motor (drive division) 48 of the outside, bottom of outer bucket 43,, link to each other with interior bucket 44 or impeller 46 by the transmission of revolving force being switched to clutch 49 and washing/dehydrating axle 45 on the washing/dehydrating axle 45 when washing or the dehydration.Impeller 46 roughly is the pot shape (comprising a pot shape) that peripheral part has inclined plane 50, and top formation stirring utilizes this structure to stir clothing in laundry processes with protuberance 51.In drying course, utilize impeller 46 to rotate the centrifugal force that is produced and make the oven dry object be easy to along the inclined plane 50 upwards to fly upward.In this way, clothing under the rotation of impeller 46, not only can about (rotation direction) transposition, the stirring that can also be subjected to stirring up and down action.
Heat exchanger tube 52 with drying function, the one end links to each other with the drainage channel mouth 54 that is arranged on outer bucket 43 bottoms by tube connector 53, and the other end links to each other with the entrance side of the hot blast air supplying part 61 that constitutes hot air circulation path 57.Heat exchanger tube 52 is used for the moist hot blast (circulated air) of circulation is dehumidified.
In addition, be provided for detecting first temperature detecting part 62 of the circulated air temperature that enters hot blast air supplying part 61 at the entrance side of hot air circulation path 57.And be provided for detecting second temperature detecting part 63 by the circulated air temperature after the heater element heating at the outlet side of hot air circulation path 57.So, the temperature of the circulated air in 62,63 pairs of drying courses of each temperature detecting part detects.
Outer bucket 43 is provided with an airtight outer bucket that is covered with above the outer bucket 43 and goes up cover 65, offers the hot blast squit hole 60 that is used to spray hot blast of drawing from retractile upper corrugation flexible pipe 58 on the cover 65 on the bucket outside this.And outer bucket is gone up on the cover 65 switching middle cover 66 freely is set, and is used for taking out and putting into clothing.
On the top of casing 41, a upper frame 68 that has (comprising central portion) clothes inlet 67 in its substantial middle position is housed, and opens and closes the enclosing cover 69 that a covering clothes inlet 67 is set freely.
In addition, at upper frame 68 rear portion inner faces, a support unit 71 that parts such as the hot blast air supplying part 61 that is used to dry and water intaking valve 70 are housed is set.
Water intaking valve 70 is many valve arrangements that can open and close the water route more than 2, is used for inside bucket 44 and supplies with running water or supply with waters for bathing etc. for inside barrel 44 by water for bathing water-absorption mechanism (not shown).At this moment, one of them water route of water intaking valve 70 has constituted by reducing valve and has opened the structure that the discharge opening area of area or washing hose 72 sides flows into the water of low discharge.Cleaning hard tube 77 on the drainpipe 75 outside a water route of water intaking valve 70 utilizes washing hose 72 and is formed at outer bucket 43 bottoms links to each other.Another water route of water intaking valve 70 has constituted by enlarging valve opens the structure that the discharge opening area of area or water supply hose 73 sides flows into the water of big flow.Another water route of water intaking valve 70 utilizes the connection of water supply hose 73, provides washings by the inside buckets 44 such as water filling parts (not shown) that are arranged on the support unit 71.
In addition, in the support unit 71 of upper frame 68 inside, being provided with one, can hold can be for the liquid detergent of use amount of laundry repeatedly, and liquid detergent is rendered to the interior automatic liquid detergent feeding device 64 of outer bucket 43 automatically.Simultaneously, automatic liquid detergent feeding device 64 and outer bucket are gone up between the cover 65, have flexible washing agent water filling flexible pipe 59 to link together by one.Then, utilize the action of (not shown)s such as air pump, the liquid detergent that comes out from automatic liquid detergent feeding device 64 force feeds is via washing agent water filling flexible pipe 59, drop onto outer bucket 43 with interior barrel 44 between.And, because that washing agent water filling flexible pipe 59 has is flexible, therefore,,, also can alleviate the influence that vibrational system and washing agent water filling flexible pipe 59 are caused even become whole outer bucket 43 whirlings of vibrational system in when dehydration.
The bottom of bucket 43 is provided for discharging the draining valve 74 of the water in the outer bucket 43 outside.Draining valve 74 links to each other with tube connector 53 with heat exchanger tube 52 by drainpipe 75.The water that ejects from tube connector 53 and heat exchanger tube 52 is directed into after drainpipe 75, the draining valve 74, is discharged to the washing machine outside by scupper hose 76.And, as mentioned above, connecting an end of the washing hose 72 that is used as water intaking valve 70 pipe arrangements on the cleaning hard tube 77 of drainpipe 75.
In addition, the position of the upstream that is in draining valve 74 in drainpipe 75, a turbidity detection portion 92 is housed, and these turbidity detection portion 92 subtend settings are radiated such as the light-emitting component of the LED of light such as visible light or infrared ray or laser instrument etc. and the photo detector of photodiode or phototransistor etc.Turbidity detection portion 92 detects the muddy degree of water and washings according to the printing opacity degree or the rate of change that penetrate the light that is present in light-emitting component that subtend is provided with and water between the photo detector and washings, detects the degree of fouling of clothing.
Simultaneously, the 3rd temperature detecting part 97 is set in the outside of drainpipe 75,, just the water temperature of utilizing water intaking valve 70 washings of water inlet in the outer bucket 43 that is connected is detected the water temperature in the drainpipe 75.
Next door, the bottom of bucket 43 is provided with a conductance test section 78 that comprises pair of electrodes 94 outside.Then, conductance test section 78 is detecting the conductance of washings, and when being dissolved in the degree that comes off of the detection dirts such as ion in the water, also according to the variation of resistance value having or not of water etc. is detected.At this moment,, be in the position also more following than impeller 46 peripheral part upper surfaces because conductance test section 78 is arranged on the bottom of outer bucket 43, so, can not be subjected to impeller 46 and rotate the influence of the current that produced, thereby can stably detect the conductance of washings.
In addition, on the excircle sidewall of bucket 43 air trap 95 that links to each other with the water level detecting portion 90 that is made of elements such as pressure sensors by air hose 96 is set outside.Water level detecting portion 90 according to the hydraulic pressure of the washings that supply to outer bucket 43 inside detect many grades (such as: from the 1st grade to the 9th grade) water level.
In addition, control device 80 is in order to control each machine, by load drive division 86 that will be explained hereinafter and control part 87 integrated being made, and be laid in (comprising plumbness) back side portion (back shroud) 81 of casing 41 with the approximate vertical state, be arranged on the upside of cooling with pressure fan 79.Control device 80 is covered and protection by case 82.
Front face at upper frame 68 is provided with an operation display part 85 that is made of input configuration part 83 and display part 84 (will be described by Fig. 2 subsequently).
Below, we will be in conjunction with Fig. 2, and the action and the function of the control device of the washing machine of present embodiment described.
In Fig. 2, control device 80 comprises load drive division 86 and control part 87.Load 86 pairs of motors of drive division (drive division) 48, clutch 49, constitute hot blast air supplying part 61 oven dry with fan 55 and heater element 56, draining valve 74, cool off and control with the action of parts such as pressure fan (cooling end) 79, water intaking valve 70, pulsating pump 91, air pump 40.Each process and the degerming, deodorisation process etc. of control part 87 by load drive division 86 pairs of washing process, rinse cycle, dehydration, drying course are controlled.
Control part 87 is by constituting such as parts such as microcomputer chips, connect power switch 89 after, the electric power that provides from source power supply 88 be provided and begin action.In this way, control part 87 receives the output from input configuration part 83, cloth amount test section 93, water level detecting portion 90, first temperature detecting part 62, second temperature detecting part 63, the 3rd temperature detecting part 97.At this moment, washing machine is presented at the content that the user sets by 83 inputs of input configuration part on the display part 84 of the operation display part 85 that is made of input configuration part 83 and display part 84.Simultaneously, control part 87 is controlled motor 48, clutch 49, oven dry fan 55, heater element 56, draining valve 74, is cooled off the action with pressure fan 79, water intaking valve 70, pulsating pump 91, air pump 40 etc. by the load drive division 86 that is made of elements such as bidirectional thyristor, relays, and each process of washing, rinsing, dehydration, oven dry is controlled.
Simultaneously, control part 87 according to the cleaning solution conductance of obtaining from conductance test section 78, from turbidity detection portion 92 obtain such as the light permeability of infrared ray and visible light etc. and its rate of change, having or not with the kind of washing agent and the degree of fouling of clothing etc. of washings detected, and each process is controlled.
Here, conductance test section 78 is made of pair of electrodes 94, water testing circuit 98 and dirt testing circuit 99 and relay 100 that these two testing circuits 98,99 are switched.Then, when water testing circuit 98 by relay 100 and after electrode 94 is connected, play the effect of a level sensor that having or not of washings is detected according to electrode 94 detected conductivities (conductance).On the other hand, when dirt testing circuit 99 by relay 100 and after electrode 94 is connected, play the effect of a dirt sensor that degree of fouling is detected.
In addition, control part 87 carries out following control in drying course: when reaching first set point of temperature (for example: 110 ℃) by second temperature detecting part, 63 detected temperature, will cut off heater element 56.Then, when (for example: in the time of low 2 ℃ temperature), control part 87 will allow heater element 56 move, to regulate the temperature of circulated air from dropped to second set point of temperature by first temperature detecting part, 62 detected temperature.
The washing machine of present embodiment is exactly by described mode, and each process is controlled and cleaning clothes.
Subsequent, we will be in conjunction with Fig. 3 and Fig. 4, and in the present embodiment, the elemental motion of carrying out washing process, rinse cycle and the dehydration of corresponding control according to the degree of fouling of cleaning solution describes.
Fig. 3 is the schematic diagram of the program from the washing process to the dehydration of the washing machine in the expression embodiments of the invention.And Fig. 4 is the flow chart of the control from the washing process to the dehydration of this washing machine of expression.In addition, in the following description, our situation many with the cloth amount and that be set at high water level (the 9th grade of water level) is that example describes.Here, water level settings is to raise gradually successively from the 1st grade to the 9th grade, and the water level till the 3rd grade all is the water level that is lower than impeller 46 peripheral part upper surfaces.And all be to stir the water level of b running according to the washing wave wheel that the cloth amount correspondingly will be described later from the 4th grade to the 9th grade water level, the 9th grade of water level is peak level.
As shown in Figure 3, the basic process of laundry action (laundry processes) is made up of washing process, rinsing (1) process, rinsing (2) process and dehydration.
As shown in Figure 4, at first, (S102) will be detected by the cloth amount that 93 pairs of cloth amount test sections have dropped in the process of washing machine starting back (S101).At this moment, control part 87 will determine the consumption of corresponding water level, washing agent according to the cloth amount, and the program that determines the back for the time being, and at display part 84 prompting water level and washing agent consumptions (S103).And in case the washing machine entry into service will utilize cover locking device (not shown) that enclosing cover 69 is fixed, after this user has only the pause button (not shown) ability switch cover 69 by input configuration part 83.
Simultaneously, water intaking valve 70 actions of low discharge, beginning is to the water inlet of washing hose 72 sides (water inlet b).By this process, with the water yield that roughly is full of drainpipe 75 from cleaning hard tube 77 in drainpipe 75, intake (S104).Then, washing machine utilizes the turbidity D0 of the running water that turbidity detection portion 92 detects into, and the data (S105) of obtaining detected turbidity D0 afterwards, this data input control part 87.
, be why for following reason by allowing water intaking valve 70 actions of low discharge intake.(intake a), by supply running water in the water supply hose 73 inside buckets 44, running water accumulates at drainpipe 75 after will penetrating dirty linen, therefore, just can't detect the D0 of turbidity accurately of running water if allow the water intaking valve 70 of big flow move.Yet, in the present embodiment, be to allow water intaking valve 70 action of low discharge, supply with a spot of running water from cleaning hard tube 77 sides, so, just can not sneak into from the dirt of clothing etc., also just can detect the turbidity D0 of running water exactly.
Then, be exactly washing agent consumption according to prompting on the display part 84, the step of corresponding input washing agent (S106).Here, the input of washing agent has two kinds of situations: a kind of person of being to use is according to the washing agent consumption of prompting on the display part 84, corresponding input powder detergent or liquid detergent, also having a kind of is that washing machine passes through automatic liquid detergent feeding device 64 input liquid detergent automatically.In the present embodiment, we are that example describes with the situation that the user drops into powder detergent or liquid detergent.
Then, after dropping into washing agent, in water inlet b process, washing machine makes water intaking valve 70 actions of low discharge, via washing hose 72, clean hard tube 77, and by drainpipe 75, tube connector 53, the 1st grade of water level (S107) of intaking in the side direction bucket down.Here, so-called the 1st grade of water level is meant than the peripheral part upper surface of impeller 46 low about 100mm also, allows the water level of conductance test section 78 low capacity under water.
Then, washing machine detects (S108) by 98 pairs of water levels of water testing circuit of conductance test section 78, if detected the 1st grade of water level, water inlet just stops (S109).In addition, generally on washing machine during sensed water level, its water level detecting portion 90 adopts this low-cost mode of hydraulic pressure that detects behind air trap 95 pressurizeds that are arranged on the outer bucket 43.Yet if will accurately detect the very little minimum one grade water level of hydraulic pressure that also hangs down about 100mm than impeller 46 peripheral part upper surfaces by this mode that detects hydraulic pressure, its detection is quite difficult.So, if utilize 98 pairs of water levels of water testing circuit of conductance test section 78 to detect, just can detect water level at the time point that water touches the pair of electrodes 94 of conductance test section 78, so, even minimum one grade water level also can correctly detect.
Then, washing machine carry out with the dissolving detergent be purpose the bucket spinning movement (S110).The bucket spinning movement is under draining valve 74 closing state, switches to the dehydration side by the clutch 49 with transmission mechanism portion, and bucket 44 rotated it to realize in the power of motor 48 was delivered to via washing/dehydrating axle 45.Particularly, be bucket 44 and impeller 46 slowly running with about 50~120rpm simultaneously in allowing.In this way, the cleaning solution in the bucket under action of centrifugal force, rotation between interior bucket 44 and outer bucket 43 lentamente, cleaning solution just can not attach on clothing, washing agent can be dissolved fully, and foaming.
Then, washing machine stops the bucket rotation, and obtains the data (S111) by turbidity detection portion 92 detected turbidity D 1.At this moment, washing machine at first utilizes the initial value of the caused turbidity D1 of washing agent in 92 pairs of cleaning solutions of turbidity detection portion to detect.Simultaneously, transfer relay 100 is connected to the dirt testing circuit 99 of conductance test section 78, obtains conductance (conductivity) E1 (S112).And the initial value of described turbidity D1 is meant the turbidity of the cleaning solution under the state that dirt do not separate out as yet from clothing.Then, the data of the initial value of the turbidity D1 of cleaning solution input control part 87, and by the computing of control part 87 by S0 judgement (S0=D1-D0), the turbidity D0 of detected running water excluded when the D0 of step S105 was obtained, and carried out the computing of turbidity value.In this way, the washing machine basis is such as turbidity, and to the kind of washing agent, the washing agent that has just dropped into is that powder detergent or liquid detergent make a determination.Then, according to the washing agent kind of judge, the time of the washing process of 87 pairs of back of control part and/or rinse cycle is made corresponding decision, and controls (S113).
Then, the 2nd grade of water level on one side washing machine is intake, Yi Bian under draining valve 74 closing state, the clutch 49 of transmission mechanism portion is switched to the dehydration side, bucket 44 rotated it in the power of motor 48 was delivered to via washing/dehydrating axle 45.At this moment, allow interior bucket 44 rotate (water inlet ﹠amp with the low speed lower (approximately 35rpm) than the speed of step S110 with impeller 46; The bucket rotation) (S114).Then, after the bucket rotation stopped, (water inlet is (S115) a) for the 3rd grade of water level of intaking.
Then, utilize the clutch 49 of transmission mechanism portion that the power of motor 48 is delivered to impeller 46 via washing/dehydrating axle 45 again,, carry out impeller and stir a (S116) running by the rotation of impeller 46.And then the 4th~5th grade of water level of intaking (intake a) (S117), and carry out impeller and stir a (S118) running.The detection of a plurality of water levels more than the 2nd grade when at this moment, washing machine is intake for these all is that the water level detecting portion 90 by pressure type implements.
By described action, washing machine at the water level that is lower than specified water level (being the 9th grade of water level of setting according to cloth amount testing result in the present embodiment) (in the present embodiment, be water level than low 4 grades of peak level), carry out so-called washing agent high concentration and stir running.In this way, washing agent can either dissolved in advance fully, and it is fully bubbled, and allow in the clothing dirt effectively stripping in cleaning solution.
Then, after impeller stirring a running stopped, washing machine obtained the data (S119) of utilizing turbidity detection portion 92 to detect the turbidity D2 of cleaning solution.Simultaneously, utilize the dirt testing circuit 99 of conductance test section 78, obtain conductance (conductivity) E2 of cleaning solution, implement dirt and detect (turbidity of cleaning solution) (S120).Then, the data input control part 87 than the turbidity D2 of the cleaning solution in the low water level of high water level carries out the computing (S121) of mixing time.
Then, allow water intaking valve 70 action of big flow, by inwardly water inlet in the bucket 44 of water supply hose 73, till reaching specified water level (such as, under the situation of Fig. 3, Fig. 4, be into water till the peak level (the 9th grade of water level)) (intake a) (S122).
Then, behind water inlet end, the mixing time that the washing machine basis is decided by the computing (S121) of control part 87, such as, be 8 minutes when using powder detergent, be 10 minutes when using liquid detergent, the beginning washing wave wheel stirs b (S123) and turns round.
Then, stir the b running in case washing machine begins washing wave wheel, clothing will collude the stirring protuberance 51 that tangles on the impeller 46 under the rotation of impeller 46, taken to central part.At this moment, the clothing that is positioned at the center lower floor position of bucket 44 is originally brought into the position, upper strata that the clothing that comes is elected bucket 44.Clothing in washing machine comes to this and stirs in the bucket 44, and contact mechanical force, the flow force that produces between the inwall by contact between the clothing or interior bucket 44 and impeller 46 and the clothing, make dirt contained in the clothing gradually stripping in the washings.So the muddy degree of washings changes thereupon.
Then, after the specified water level (the 6th~9 grade of water level) of regulation began the washing wave wheel stirring b running of washing process, washing machine also will utilize the turbidity D3 of 92 pairs of cleaning solutions of turbidity detection portion to detect and obtain data (S124).Simultaneously, utilize the dirt testing circuit 99 of conductance test section 78, the dirt that conductance (conductivity) E3 of cleaning solution is caused detects and obtains data (S125).
Then, obtain (S111) and turbidity D2 at turbidity D1 and obtain in (S119) detected data and obtain detected data in (S124), carry out S2 at control part 87 and judge (S2=D3-D2 or D3-D1) and computing (S126) with turbidity D3.Similarly, obtain (S112) and conductance (conductivity) E2 at conductance (conductivity) E1 and obtain in (S120) detected data and obtain detected data in (S125), carry out T2 at control part 87 and judge (T2=E3-E2 or E3-E1) and computing (S126) with conductance (conductivity) E3.
Then, the result that control part 87 is judged according to S2 and T2 judges carries out computing, according to the degree of fouling of cleaning solution, to the degree of coming off of the dirt of washings make a determination (S126).And, about the degree of fouling of cleaning solution, the judgement of the degree that splits away off from clothing of dirt just, we will describe in conjunction with Fig. 5 in the back.
In this way, washing machine is according to the result of determination to the degree that comes off of the dirt of washings, to the laundry time of back replenish revise after, implement impeller and stir b (S127) and turn round.And, according to result of determination, to next process to the degree that comes off of the dirt of washings---the rinsing (1) of rinsing (1) process is stirred running such as c and is controlled.
Below, we will be elaborated to rinsing (1) process in conjunction with Fig. 3 and Fig. 4.
At first, as shown in Figure 3, washing machine is opened draining valve 74 earlier, and the water of 44 li in interior bucket is discharged by scupper hose 76.Then, the clutch 49 of transmission mechanism portion is switched to the dehydration side, bucket 44 rotated it in the power of motor 48 was delivered to via washing/dehydrating axle 45.Mode by such applies centrifugal force to clothing, implements the dehydration running that moisture is separated from clothing.Subsequently, in water inlet a process, washing machine allows the water intaking valve 70 of big flow move the high water level of intaking (the 9th grade of water level).Then, in order to remove the washing agent liquid in the clothing, CD-ROM drive motor 48 once more, and according to the result of determination of the degree that comes off of the washings dirt of being judged among the step S126, c (S128) running is stirred in beginning rinsing (1) as shown in Figure 4.
By top process, rinsing (1) process has just been finished.
Then, washing machine is implemented final rinse cycle as follows, rinsing just (2) process.
At first, same with rinsing (1) process as shown in Figure 3, washing machine carries out draining, dehydration and water inlet a earlier.Then, according to the result of determination of the degree that comes off of the washings dirt of being judged among the step S126, c (S129) running is stirred in the rinsing of carrying out as shown in Figure 4 (2), thereby finishes rinsing (2) process.
Then, in dehydration, after rinsing (2) process finished, washing machine was opened draining valve 74 earlier the water in the interior bucket 44 is discharged by scupper hose 76.Then, the clutch 49 of transmission mechanism portion is switched to the dehydration side, bucket 44 rotated it in the power of motor 48 was delivered to via washing/dehydrating axle 45.In this way, enforcement utilizes dehydration (S130) running that centrifugal force is separated the moisture in the clothing.
Below, we will describe the degree of fouling of cleaning solution, the judgement of the degree that comes off of clothing dirt just in conjunction with Fig. 5.
Generally speaking, the dirt in the clothing comprises various dirts such as sweat dirt, dirt.Then, utilize the turbidity detection portion 92 that degree detects that sees through of light, when detecting,, but, judge so be difficult to make accurately because the muddy degree of cleaning solution is light even the dirt that sweat caused is very serious such as the sweat dirt.On the other hand, utilize the conductance test section 78 of conductance (conductivity) the detection dirt of cleaning solution, when the water that contains salt after to the dirty stripping such as sweat detects, because altering a great deal of conductance (conductivity) will be made and actual degree of fouling judgement identical, that degree of fouling is serious.Therefore, can judge the degree that comes off of clothing dirt fully.
Yet under the situation that is detecting dirt, though cleaning solution is muddy, but the variation of conductance (conductivity) is very little.So, can correctly judge coming off of dirt by turbidity detection portion 92, but be difficult to make judgement accurately by conductance test section 78.
Therefore, as long as the data that turbidity detection portion and these two dirt test sections of conductance test section are obtained comprehensively judge, just can be to the degree of fouling of cleaning solution, just the degree of coming off of clothing dirt makes a determination.
Fig. 5 is the matrix diagram of the correlation between the degree of fouling of the degree of fouling of turbidity representative of the washing machine of expression in the present embodiment and conductance (conductivity) representative.
And the longitudinal axis of Fig. 5 is represented is the result who utilizes the S2 of the degree of fouling of the turbidity representative that turbidity detection portion 92 obtains to judge, expression is along with from D-L1 to D-L4, and the degree of fouling of washings constantly increases.Simultaneously, the transverse axis of Fig. 5 is represented is the result who utilizes the T2 of the degree of fouling of conductance (conductivity) representative that the dirt testing circuit of conductance test section obtains to judge, expression is along with from E-L1 to E-L4, and the degree of fouling of washings constantly increases.
Then, to T-L4, the degree of fouling that obtains from described two dirt test sections is carried out synthetic determination according to T-L1 shown in Figure 5.
Particularly, be D-L1 such as degree of fouling in turbidity representative, be judged as slightly dirtyly, the degree of fouling of conductivity representative is E-L4, is judged as under the dirty situation of severe, it is dirty just comprehensive degree of fouling to be judged to be the severe of T-L4.At this moment, washing machine judges that the sweat dirt splits away off from the clothing that serious dirts such as sweat are arranged.
In addition, be D-L3 at the degree of fouling of turbidity representative, it is dirty to be judged as moderate, and the degree of fouling of conductivity representative is E-L3, is judged as equally under the dirty situation of moderate, and it is dirty just comprehensive degree of fouling to be judged to be the moderate of T-L3.At this moment, washing machine judges that moderate sweat dirt and dirt split away off from clothing.
That is to say that washing machine is the result's that judges of the result that judges according to S2 and T2 synthetic determination result, whether dirt has fully been split away off from the clothing made judgement.
Then, the rinsing (1) that the impeller of the washing process of back is stirred the prolongation of time of b (S127) running or shortening, rinsing (1) the process rinsing (2) of stirring c (S128) and rinsing (2) the process process that stirs the prolongation of c (S129) time or shortening etc. is controlled.Particularly, such as, set wash time longer according to the order of T-L1, T-L2, T-L3, T-L4.Perhaps, the rinsing time set is got longer etc. according to the order of T-L1, T-L2, T-L3, T-L4.
As mentioned above, washing machine at first in washing process, utilizes the turbidity of turbidity detection portion detection cleaning solution, and degree of fouling is made a determination.Simultaneously, utilize the conductivity of conductance test section detection cleaning solution, and degree of fouling is made a determination.Then, according to turbidity and these two result of determination of conductivity, to degree of fouling, just whether dirt has fully split away off from the clothing and has made final decision.Then, according to the result of final decision, control part is controlled such as washing process, rinse cycle and dehydration the back.At this moment, by the conductance test section, the water level detecting portion that can detect the pressure type that adopts common air trap pressurized is difficult to detected utmost point low water level.And, only, just constituted the conductance test section by appending relay and a part of dirt testing circuit and being common to water level detecting and the electrode of dirt detection.Therefore, realized not only low price, and conductance test section simple in structure.
By present embodiment, can realize a kind ofly both can making high reliability, high-precision judgement, thereby, implement washing process and rinse cycle, the washing machine that has outstanding laundry performance again by setting-up time rightly to degree of fouling.

Claims (2)

1. washing machine is characterized in that comprising:
Be lifted on the outer bucket in the casing;
Be supported on the interior bucket in the described outer bucket;
Be arranged on the impeller of the inner face bottom of described interior bucket;
Drive the drive division that described interior bucket or described impeller rotate;
Be arranged at the water intaking valve on described casing top;
The drainpipe that is communicated with described outer barrel bottom;
Via the described drainpipe draining valve that the bucket draining is gone out outside described;
Be arranged in the described drainpipe and be used to detect the turbidity detection portion of the muddy degree of cleaning solution;
Be arranged on the next door, bottom of described outer bucket and comprise the conductance test section of pair of electrodes; With
The control part that washing process, rinse cycle, dehydration are controlled,
Described control part is in described washing process, utilize described turbidity detection portion that the muddy degree of described cleaning solution is detected, also utilize described conductance test section that the conductivity of described cleaning solution is detected simultaneously, and, described each process is controlled according to the result of determination of described turbidity detection portion and described conductance test section.
2. washing machine according to claim 1 is characterized in that: described conductance test section comprises water testing circuit and dirt testing circuit, and the signal from described pair of electrodes is switched between described water testing circuit and described dirt testing circuit.
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