CN1013708B - Water level detector of fully automatic washer - Google Patents
Water level detector of fully automatic washerInfo
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- CN1013708B CN1013708B CN 89101604 CN89101604A CN1013708B CN 1013708 B CN1013708 B CN 1013708B CN 89101604 CN89101604 CN 89101604 CN 89101604 A CN89101604 A CN 89101604A CN 1013708 B CN1013708 B CN 1013708B
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Abstract
In a full-automatic washing machine, a knit fabric quantity sensor uses the detected quantity of knit fabrics which are to be washed in a washing barrel as the quantity including information of the thickness degree of the knit fabrics which are to be washed. A processing circuit in the washing machine is in response to detected output signals from the knit fabric quantity sensor to determine water supply volume, detergent injection volume, agitating duration and washing duration. The knit fabric quantity sensor is arranged on an agitating motor. The detected output signals are generated through detecting voltage waveforms which are induced by the inertial motion according to an off state of the motor, and the voltage waveforms change with the thickness degree of the knit fabrics which are to be washed.
Description
Present invention generally relates to washing machine, and more particularly, relate to a kind of level switch of automatic washing machine, this washing machine is automatically finished the operating process Zi the dehydration of the water supply before the washing after wash.
In automatic washing machine, must there be a sensor accurately to detect about dropping into the information of the number of articles to be washed in the washing tube.This is because for article to be washed, and the stirring time, the washing agent quantity of injection is used for the output of rinsing, and the rinsing time of article to be washed, depends on the information relevant with number of articles to be washed.Accurately do not regulate output and detergent amount, just can not automatically carry out optimum washing operation.
For example, the Japanese patent unexamined publication number sign indicating number is to have proposed a kind of automatic washing machine in the No.53-35272 document.Yet this is applied for only the information of the weight of article to be washed as relevant number of articles to be washed.The present inventor has been found that in automatic washing machine, only the weight of article to be washed is difficult to determine the optimum output and the injection rate IR of washing agent as the information about article number product to be washed.Aforementioned application has been pointed out will detect dirty degree and determine the washing agent injection rate IR, but does not disclose the concrete apparatus and method of any used as said purpose.Yet, in automatic washing machine, unless carefully design a kind of structure of being convenient to operate that is used for accurately regulating output and washing agent injection rate IR, and the method for control, just can not look to obtaining optimum automatic washing operation.
A target of the present invention provides a kind of level switch of automatic washing machine, drops into the state of the washing articles in the washing tube and realizes optimum washing by accurately regulating output and washing agent injection rate IR by detection correctly.
Maximum characteristics of the present invention are, by means of a sensor, with the fibrous material kind of article to be washed the different abundant degree for the treatment of washing can be used as with drop into washing tube in the relevant information of amount of article.In the following description, the number of articles to be washed that comprises the abundant degree of article to be washed will be called " fabric amount " simply.
In conjunction with the accompanying drawings, from the following detailed description, the present invention will be tangible.
Fig. 1 is a sketch, is used for illustrating the general structure according to the automatic washing machine of one embodiment of the invention.
Fig. 2 is the perspective view of being looked by the top of the automatic washing machine that shows among Fig. 1;
Fig. 3 is a calcspar, has shown an example of the automatic washing machine circuit that shows in Fig. 1 briefly;
Fig. 4 is a sketch, has explained the work of the washing agent conveyer 200 that shows among Fig. 1;
Fig. 5 is the partial cross section figure that stops valve 32 that shows among Fig. 4;
Fig. 6 is a sectional view, has shown the principle of work of the washing agent conveying motor-mount pump 25 shown in Fig. 4.
Fig. 7 is the partial cross section figure of the motor-mount pump 25 that shows in Fig. 6;
Fig. 8 is the front elevation at the guidance panel shown in Fig. 2;
Fig. 9 is the simplified flow chart that shows an example of washing process;
Figure 10 is the partial cross section figure of fabric quantity sensor 10 shown in Figure 1;
Figure 11 is a curve map, has shown the waveform of the output signal that provides from the fabric quantity sensor shown in Figure 10 10;
Figure 12 is a curve map, and the relation between the clothing of die-away time and article to be washed is heavy of having shown is how along with the kind of article to be washed changes;
Figure 13 is the cross-sectional of water level sensor 6 shown in Figure 1;
Figure 14 is a circuit diagram, is used for producing an output signal from the water level sensor shown in Figure 13 6.
Figure 15 is a curve map, has represented the family curve by the output signal of the circuit shown in Figure 14.
Figure 16 is a curve map, has shown with liquid detergent viscosity to change the variation of relevant liquid detergent injection rate IR with respect to environment temperature;
Figure 17 is a curve map, has shown environment temperature and has been added on relation between the electric power on the motor-mount pump 25 of carrying washing agent;
Figure 18 is the view of a bimetal tube, this effective size that mechanically changes the liquid detergent passage.
Figure 19 is the partial cross section figure of liquid detergent injection rate IR regulator 22a shown in Figure 4; And
Figure 20 is the front elevation of variable valve 22b shown in Figure 19.
Now will be by coming to be described with embodiment with reference to the accompanying drawings to of the present invention.With reference to figure 1, the water jacket 2 that is used for compiling slurry is to be placed in shell 1.Water jacket 2 has a supporting ear handle 2a who outwards protrudes, and hanging stick 7 is by spring 9 and this supporting ear handle 2a engagement.Place, the two ends of hanging stick 7 is connected to undersetting 7a and upper bracket 8, and upper bracket 8 fastenings are on the bent plate 1b on the top that is installed on shell 1, so that water jacket 2 flexibly supported, and the outer wall 11 of washing tube has many through holes, and it also is used as dehydration barrel.The agitation blades 12 that is used to stir article to be washed is connected to the rotating shaft 16 that is connected with driver 15.Driver 15 has a reducing gear and a clutch part, and purpose is that the belt pulley 14a and the 15a that distinguish the rotation of agitation blades 12 and washing tube 11 transmit torques from CD-ROM drive motor 14 to driver 15 by belt 17.Support the central base of motor 14 and driver 15, be installed in the bottom of water jacket 2.Water inlet 2b protrudes in the bottom of water jacket 2, and be connected with water level sensor 6 by a conduit 5, and water level sensor detects output according to water level.Osculum 2c is connected to draining valve 3, and draining valve itself is linked from shell 1 outward extending scupper hose 4.Shell 1 has feet 1a in its bottom.Fabric quantity sensor 10 can be used for detecting the rotation of motor 14.
The feed pipe 18 of extending out from the water swivel (not shown) is supplied with washing tube 11 to water by feed water valve 19, reference number number top cover of 27 expressions, and 104 expressions are placed in the temperature-sensitive sticker that is used for the testing environment temperature below the top cover 27.
The accumulator tank 23 that is used for the storing liquid washing agent has a block 23a, and for the motor-mount pump 25 that forces the delivering liquid detergent use is linked drinking-water pipe 26 and rising pipe 22, and drinking-water pipe 26 is connected to groove 23.Rising pipe 22 is connected to connector 24(and consults Fig. 4 by stopping valve 32), connector 24 is the contributing regions that are connected to the washing tube that is used to supply water.
Fig. 2 (as seen from the above) expresses the automatic washing machine of Fig. 1 with the skeleton view form.With reference to figure 2, the guidance panel of using for the user 51 is placed on the top cover 27.In this embodiment, for the accumulator tank 23 of storing liquid detergent use is the top that is removably mounted on washing machine, the part 100 of electric control circuit as shown in Figure 3 be arranged on working panel 51 under, by 28 represented be a lid that covers opening, article to be washed drop in the bucket by opening.
Fig. 3's embodiment of electric control circuit of this automatic washing machine has drawn, and in the central authorities of electric control circuit a treatment circuit 100a who comprises microcomputer is arranged, and supplies with constant DC of these microcomputers by constant voltage power supply circuit 101 and presses.Treatment circuit 100a is coupled to fabric quantity sensor 10 by comparator circuit 102a and testing circuit 103a, be coupled to water level sensor 6 by comparator circuit 102b and testing circuit 103b, and be coupled to temperature-sensitive sticker 104 by comparator circuit 102c and testing circuit 103c.Selecting circuit 106 is to be used for selecting washing process.And display circuit 107 is used for showing selection course, detergent amount and various off-rating.From the signal that various sensors come, all handle, and be coupled to motor 14 by driving circuit 108 by microcomputer, feed water valve 19, in draining valve 3 and the detergent delivery device 200 wished one or more.
The details of detergent delivery device 200 will be described with reference to Figure 4 and 5.Liquid detergent of being contained in groove 23 33 and the water level between the valve 32 that stops that is provided with a water delivering orifice 32a have a drop H.In some instances, the water level of liquid detergent can be under water delivering orifice 32a, thereby drop H can be changed into negative.In this embodiment, groove 23 is arranged on the washing machine cover lid 27, makes that drop H is positive, yet, if groove 23 is the inner spaces that are placed on shell 1 alternatively.Then drop H will become negative.Under the situation that does not stop valve 32, when drop H is timing, liquid detergent will spontaneously flow out, and when drop when being negative, appear at the liquid detergent in the pipeline 22, to turn back to motor-mount pump 25, like this, just cause the irregularities of the liquid detergent injection rate IR of being scheduled to by the driving time of motor-mount pump 25.As shown in Figure 5, stop that valve 32 has a water delivering orifice 32a, water inlet 32b and marginal central area.In central area, sheet rubber 38, pad 39 and weak spring 40 are to be provided with like this, so that allow the liquid detergent folk prescription pass through to ground.Water delivering orifice 32a is arranged in the downstream of water channel, and water is through feed water valve 19, and water supply hose 18a, the level and smooth pin battle array of connecting port 24a and current 24b flow in water channel.This arrangement of water delivering orifice 32a can guarantee that washing agent can mix with water, so that obtain dilution, injects washing tube by an apopore 24c then, thereby has prevented that article to be washed are subjected to the damage of washing agent thick or high concentration.
As shown in Fig. 6 and 7, motor-mount pump 25 has a little electro-motor in this specific embodiments, and blade 37 that is connected to motor shaft 36 and seal element 41 are arranged in its housing 25a.Under the situation of blade 37 rotations, liquid detergent is pressed the direction of arrow with being compelled to and is carried.
These blades 37 of pump 25 are made by rubber or flexible plastic, and the end of the neighboring of these blades overlays housing 25a inside circumference, thereby form a so-called centrifugal pump.
Because this pump can be carried washing agent and air simultaneously, even when air is current in pipeline 22, also gas lock can not take place.So, come the delivering liquid washing agent with this pump with the ability of giving vent to anger, be desirable for the present invention.
Under the situation of blade 37 runnings, because friction, pump 25 tends to wearing and tearing.But pump 25 can not be damaged, because under the condition of operate as normal, pump can work really long days.Suggestion adds silicone oil at the slipper of blade 37, makes pump keep long-lived.For the detergent amount that accurate control will be injected, perhaps preferably take a stepping motors to replace this little electro-motor.Because blade 37 closely contacts with housing 25a, be different from the pump of other patterns.When quitting work, pump 25 helps to stop valve 32, plays the effect of a runner valve.
Though what pump 25 related to is little flow rate, it can produce enough pressure effectively.Liquid detergent has different viscosity, and this will decide on used kind.If pump can not produce enough pressure, when viscosity was high slightly, the washing agent injection rate IR will reduce widely so.With this pump 25 that can produce enough pressure, the minimizing of washing agent injection rate IR can be got rid of.This will help even when using various washing agent, therefore the injection rate IR of washing agent can not have big difference yet.
As previously mentioned, water delivering orifice (end) 32a that stops valve 32 communicates with apopore 24c by connector 24.Use the reasons are as follows of this structure:
(1), is provided with at the end of pipeline 22 and stops valve 32 in order after stopping to inject washing agent, to make the remaining washing agent amount of oozing reduce to minimum.
Because after washing finishes, oozing of remaining washing agent taken place, need unnecessary repetition rinsing, antidrip measure is important.
(2) even it is highly effective stopping valve 32, also will remain with a small amount of washing agent at water delivering orifice, this causes the harmful drippage of washing agent or condenses (thereby having blocked water delivering orifice).Yet in the embodiment of Fig. 4, water delivering orifice 32a is positioned at connector, and facing to apopore 24c, thereby can clean water delivering orifice 32a very totally in the water supply operating period that comprises rinsing, to remove above-mentioned trouble.
As described in Figure 4, the regulator 22a as washing agent injection rate IR regulating device is configured in conduit 22 midway.22b represents a variable valve.Regulator 22a and variable valve 22b will describe in detail later.
The operation of the automatic washing machine of above-mentioned structure and working condition will be narrated with reference to figure 8, Fig. 9 and table 1.Guidance panel 51 has a viewing area 52.The user can select in large scale main operation key 55,56 and 57, makes in " very dirty " " generally dirty " and " dirty slightly " one in order to make the user, and these keys are arranged on a position easily.By the key of having selected by the next one, begun a washing operation according to a predetermined washing process program.At main operation key 55,56, or one of 57 pressed before or after, can press collateral key 53 and 54, those are operated in advance to remove to finish " washing in advance " and " washing by soaking " respectively.These prewashing operations are programmed in the above-mentioned predetermined washing process program.Therefore, behind the prewashing EO, operation steps jumps to corresponding to a program pressing one of main operation key 55,56 or 57, to finish the operation of a washing process.Flat deck 50 is provided with a knob 50a.Dispose various switches 50 times at flat deck, be used for doing the conversion of being wished by pressing program that one of main operation key 55,56 or 57 are determined.For example, be provided with a manipulated key that is used for conversion wash time or dewatering time.For fear of the trouble of selecting various keys, have only those mainly to be set on the guidance panel, and be capped with flat deck 50 without those keys commonly used as the key of washing operation.As long as this automatic washing machine is working properly, just do not need to press the switch that those are covered with by flat deck 50.
Inject washing agent by one of pressing in main operation key 55,56 or 57, and the injection rate IR of washing agent is to come meticulous adjusting according to the pattern of main operation key and the fabric amount of article to be cleaned.For example, the main operation key 55 of pressing Mode A is in order to wash very dirty article.When pressing automatic operating process of key 55 beginning, the washing agent injection rate IR is with respect to increasing about 20% by the washing agent injection rate IR under the Mode B of " generally dirty " representative.When pressing the key 57 of pattern C in order to wash " dirty slightly " article, the washing agent injection rate IR roughly is half of injection rate IR under the Mode B.
Washing operation is that the simplified flow chart according to Fig. 9 carries out.In step 201, at first drop into article to be washed.And in step 202 according to the dirty degree of these article, one of press in main operation key 55,56 or 57 in step 204, supply water then (1).Supply water (1) continue to supply water and reach up to output that water level sensor 6 measures washing tube, four preset level " very low " of representing with water level, " low ", " in " and " height ", " medium ", " very low " till.Subsequently, stirring (1) is to carry out in step 205.It is very weak stirring that (1) compare with the stirring of normal washing, and just is used for measuring in step 206 the fabric amount at the substrate product.The fabric amount of measuring has been determined the water level of step 207 and the washing agent injection rate IR of step 208.Like this, correspondingly supply water (2) and washing agent injection automatically.Because just fabric amount and the washing agent injection rate IR at washing articles all is known now, so output, rinsing time and dewatering time also can be determined in this stage.As a result, can be determined, to finish the program of later step for the step parameters needed that recurs.
After the washing agent that water level and washing agent injection rate IR have been adjusted to the water supply (2) that is adapted to step 207 and step 208 injects the fabric amount of article wherein, washing process sequentially proceeds to stirring (2), stirring (2) is the washing that is applicable to article in the step 209, draining in the step 214, dehydration in the step 215, the water supply (3) of rinsing for the first time in the step 216, the draining of rinsing for the first time among the step 214a, and the draining of rinsing for the second time among the step 216a finishes.If be no more than the peak level of washing tube, for the output of the drift ice first time, representing with water level can be than the stirring and the high one-level of washing (step 209) output of regulating according to the fabric amount.For the output of the rinsing second time, can be adjusted to peak level.Method with such adjusting output is operated in first and second rinsings, and rinsing effect can further be promoted.In some instances, can add by
Draw together into step 210 to 213.
In fact, washing agent is automatically carried in (2) process of water supply, so that mix with the water of supplying.For this purpose, the action of washing agent conveyer 200 and feed water valve 19 is operated together.
Except the step place that keys in by main operation, in step 203, can press collateral key 53 or 54, automatically carrying out the pre-wash operation according to an additional degree, this pre-wash operation is normally by manually finishing.By pressing pattern
The operation of " preparation washing " process of collateral key 53 beginning before normal washing, carrying out, purpose is through pre-wash the very dirty article such as working cloth or towel.Usually, after " pre-wash " finished, other article to be washed are added on the washed in advance article, after this, washing procedure just enters step subsequently.Therefore, a certain amount of washing agent that adapts with the article fabric amount that is subjected to the domination of " pre-wash " process automatically injects in step 208, carry out the step of 217 stirring (2) then, 218 drain step, 219 dehydration then is to interrupt 220 alarming step, with 221 interrupt step, use as bracket
Expression.Obtain the notice that " pre-wash " finished by warning and interrupt step, and receive the indication of feeding additional washing articles.When break period of pre-decision in the past after, the subroutine of " pre-wash " can be waited motionless, till having supplied with additional washing articles, judges whether add additional washing articles by the open/close detection signal of lid that representative is added overage and influences.After this, step subsequently just can go on.Another kind method is that after past predetermined interrupt time, subroutine can be carried out step subsequently immediately.Here, step subsequently is meant the step 204 of water supply (1), wherein reaches the water level of " very low " by one of pressing in main operation key 55,56 or 57 to supply water always.In this stage, measure total washing articles (through pre-wash and without pre-wash) the fabric amount, and then automatically inject a certain amount of washing agent.After this, the step of the water supply (3) of stirring, draining, dehydration and the rinsing of washing (2) has just sequentially gone on.
" washing by soaking " from pressing collateral key 54, and carry out and use in Fig. 9
Those steps of drawing together.In the past, " washing by soaking " operation is accomplished manually, be used in washing machine the very dirty article of prewashing before the washing articles, it is to steep this dirty article with the water logging of band washing agent in a washing tube, applying one at set intervals vibrates clean the laundry item product on the laundry item product, and in washing tube, once more article to be washed are soaked one section reasonable time subsequently, again article to be washed are moved on in the washing tube, be added with the water of band washing agent in the washing tube, and wash according to normal procedure.According to the embodiment that shows among Fig. 9, the whole prewashing operation of above-mentioned " washing by soaking " is carried out by washing machine itself.For by mode A, B or C operation, before or after pressing main operation key 55,56 or 57, collateral key 54 is pressed, according to aforesaid preset program, washing process sequentially carries out, till the step 208 of automatic supplying detergent, be branched off into then with
The step 222 to 228 of drawing together, wherein, the a series of short time as step 222 (10 seconds to 3 minutes) stirs (3) and interrupts for a long time as the relative of step 222, is periodically repeated several times to step 228 by step 224, to finish " bubble is washed " operating process.Typical this process will continue about 1 hour.
After this " washing by soaking " operating process is not draining and dehydration.So, finish " washing by soaking " afterwards, washing procedure is entered the step 209 of the stirring (2) corresponding to normal washing by last interrupt step.Under the process situation of " washing by soaking " operating process, after this pre-wash process, the very dirty article of establishing originally into washing tube to be washed just enter normal washing just.
In the step 209 corresponding to normal washing, the time that is used for stirring (2) be not need all the time predefined, but can be by realize adjusting (though needing the program of a complexity for this purposes) by the specific operating key of the next one.In order to narrate this modification, should at first note such situation, cancellation washing agent injection automatically is to realize by pressing flat deck 50 following cancel keys, when the liquid detergent of automatic injection runs out, and in the time of must using standby powder detergent, open cover plate 50, press cancel key.Directly adhere to fabric for fear of powder detergent and cause, only just instructing in the middle of the washing agitation step or after supplying water by the key entry of treatment circuit 100a taking-up cancel key to the fabric harmful effect.It is longer than liquid detergent institute's soluble in water time spent that powder detergent is dissolved in the water institute's time spent.Therefore, in stirring (2) process of the step 209 that is used for washing, under identical situation of time, be placed on the foul that washs in the powder detergent solution and wash totally not as being placed in the liquid detergent solution.And then when liquid detergent dissolved in the water immediately, powder detergent is dissolved in the water then needed a few minutes (though the length of this time is relevant with water temperature).By pressing cancel key, the washing time of (2) of stirring that is used for of step 209 can access prolongation, to eliminate the difference of washing speed.
" washing by soaking " is so effectively so that and the normal washing of not carrying out " washing by soaking " when comparing, can reduce half in the time of the stirring (2) of step 209.
Similarly, compare with the quantity of automatic transport washing agent at the very start, under the situation of " pre-wash ", the additives amount of the washing agent that injects can reduce automatically.Thereby, enough good effect can be accessed and washing agent can be saved.
The fabric quantity sensor 10 of the fabric amount that is used to judge the article that washing will be described now.With reference to Figure 10, the sleeve 64 that has magnet 63 is fixed on the rotating shaft 10b that stretches out from motor 14.The shell 60 that has a pole piece 60a and a coil former 66 is fixed on the shell 14a of motor 14 by means of screw 65 with its flange 60b.Magnetic sheet sheet 60a faces magnet 63, and coil 61 is on coil former 66.The lead-in wire of coil 61 is 62.When stirring, motor 14 is powered off and on to form 0.3 to 1.0 second on-state and 0.3 to 2.0 second off-state.This on/off state is repeated periodically with rotating shaft 10b.
In order accurately to judge the fabric amount, when judging the fabric amount with fabric quantity sensor 10, the work of preferably selecting motor 14 is than the work ratio less than motor under the normal washing state.In brief, make turn-on time of motor 14 be shorter than the turn-on time under the normal washing state and/or make the trip time of being longer than trip time of motor 14 under the normal washing state, just can accurately judge the fabric amount.Magnet 63 and magnetic sheet sheet 60a induce electromotive force.Because the inertia of rotation, after motor 14 be off-state, rotating shaft continued rotation, thereby the electromotive force of responding to must be as the waveform as indicated in Figure 11.Supposition now, the off-state of motor occurs in a point, and the rotation of rotating shaft 10b is slack-off, up to the b point, has produced peak value and has surpassed threshold value V
ThThe voltage waveform of (for example 0.4 volt).Therefore, by a time interval, in other words between an a and b die-away time T
hJudge that the fabric amount that drops into the article to be washed in the washing tube is possible.In this case, can be directly, or measure T die-away time with the peak value purpose method that another kind of number surpasses the voltage waveform of threshold value
hIn by the number peak value decision method of die-away time, motor repeatedly on/off is operated repeatedly, on average or always to be added in the peak value number of voltage waveform under the repetition off-state.Can be with T die-away time
hThe reason of judging the fabric amount of article to be washed will be described below with reference to Figure 12.Fabric weight and the relation between die-away time show in Figure 12, wherein, the curve I is made for so-called " mixed goods ", mixed goods is that various fabrics mixes, and supposition all is common and article to be washed actual family expenses, and the curve II is made such as denim pants with abundant fabric for hard relatively.To see that by Figure 12 under identical weight, the die-away time of the die-away time during for bottom weight during than the fabric that is curve I representative is short, thereby, the information that provides representative to compare with the article of curve I representative than heavy articles.When output is information when decision thus, for bottom weight, such as denim pants, the water level that sets will be higher than the water level that the fabric for the curve I sets.This result is generally consistent with actual washing operation.
Therefore, according to the representative that passes sensor 10 from the fabric amount comprise that the detection signal of the number of articles to be washed of abundant degree decides output, washing agent injection rate IR and stirring time, can finish to pinpoint accuracy washing operation.
Table 2 has been represented T die-away time
hAnd the relation between the fabric amount of article to be washed.This relation is to obtain with the fabric quantity sensor 6 that shows among Figure 10.In this example, according to die-away time (or peak value number of being counted), the fabric amount is divided into four grades.
Li water level sensor 6 has a base 70 that has pressure transfer port 70a as shown in Figure 13, by this pressure transfer port, pressure is transferred on the barrier film 71, and plunger 72 repeatedly is overlying on the barrier film 71, and has a displacement guiding and support bar 72a to prevent the inclination and offset of plunger.A magnetic element 73 is fixedly secured on the plunger.The lead-in wire of coil 74 is 75.According to the pressure that is applied on the barrier film, spring 76 is pressed in above the barrier film 71 with a desirable load, and reference number 77 is spring abutments of expression.
With this structure, barrier film rises along with water level and to top offset so that magnetic element 73 is near coil 74, and on the contrary, along with the reduction of water level, it to bottom offset to return to its original position.In other words, the variation of pressure causes the displacement of magnetic element 73 with respect to coil 74.As a result, the reactance of coil 74 changes.Typically, provide the LC that utilizes this reactance change oscillator, and the oscillation frequency of this LC oscillator is judged to determine the numerical value of water level by microcomputer.Figure 14 has shown the basic circuit of this LC oscillator, and it has capacitor 80, adjusts resistance 81 and 84 and phase inverters 83.Oscillation output signal is added to treatment circuit 100a.If essential, can between this basic circuit and treatment circuit 100a, insert a counter/timer interface circuit.In real danger, oscillation frequency so changes along with the displacement of magnetic element, makes oscillation frequency reduce along with the increase of reactance, thereby has drawn a curve as shown in figure 15.The point of a hope on this curve is with deciding a water level that is suitable for controlling.
Washing agent operational throughput regulator 22a shown in Figure 4 has the structure as Figure 19 and 20 examples.Variable valve 22b rotatably is installed on the body of regulator 22a, and seal 22c has prevented the seepage of liquid.All there is the connector that links to each other with conduit 22 on each limit of the body of regulator 22a.Variable valve 22b allows on path with flow rate do step by step the adjusting of five grades to washing agent.Regulate hereto, can rotate variable valve 22b with a turnscrew, coin or similar articles.Regulator normally latch-up-free ground is regulated flow velocity.Regulate variable valve 22b according to the kind of washing agent.More particularly, must washing agent be mixed mutually in different ratios with water according to the instructions of washing agent manufacturing firm and/or the kind of washing agent.Because be added to the water level sequencing in advance in the washing tube, output is difficult to change.Therefore, in order to obtain desirable mixing ratio, rotate variable valve 22b to regulate the washing agent operational throughput for used washing agent.For high concentration detergent, so set variable valve 22b, so that it suppresses flow velocity.For the high viscosity washing agent, so set variable valve, it is played a driving role to flow velocity.Washing agent fabricator's the name and the plate of washing agent can be added on the index dial.
Regulator can be made various multi-form.In an example, the area in input field hole can change because of adjusting.For fear of the spontaneous change of desired location in the course of the work, preferably add a suitable locking mechanism.Regulator is arranged on the downstream of the water delivering orifice of motor-mount pump 25, with the variation of restriction washing agent injection rate IR.
As previously mentioned, after article to be washed drop into,, press any one main operation key, supply water and stirring subsequently automatically to finish by predetermined quantity for making automatic washing machine work.In this agitation, fabric quantity sensor 10 is judged the fabric amount of washings, thereby produces data of being handled by microcomputer, and finishes washing again according to these data and supply water.When supplying water with washing, the washing agent injection rate IR that the fabric amount therewith of having measured adapts.When supplying with the slurry end, make the detergent delivery device action, to inject the washing agent of institute's number of computations, mix with the water that adds simultaneously, along with finishing of water supply, begin to stir to wash.
Yet shown in curve among Figure 16, the viscosity of liquid detergent changes with environment temperature, has caused the change of the detergent amount of motor-mount pump 25 conveyings with respect to driving time.For example, even so set the driving time of motor-mount pump 25, make in the time of 20 ℃, washing agent for 40 milliliters of specified washing capacity injections, and the washing agent injection rate IR becomes 13 milliliters in the time of 0 ℃, and becomes 55 milliliters in the time of 40 ℃, and this has caused the very big difference of washing agent injection rate IR.
Thereby, must be used for proofreading and correct the washing agent viscosity-modifying by means of temperature-sensitive sticker 104 testing environment temperature according to the electric measurement such as thermistor.Purposes method is divided into tiny section to ambient temperature range for this reason, and is so to regulate corresponding to the driving time of the motor-mount pump 25 of each section, makes it possible to carry desirable washing agent injection rate IR.So, as shown in table 3, for the environment temperature section T
1, used driving time is a, and for the environment temperature section T
2, used driving time is b, or the like.According to second method, ambient temperature data from temperature-sensitive sticker 104 is changed into an electric weight that is added to motor-mount pump 25 by microcomputer, so control this electric weight, (or driving electric power), feasiblely can provide an electric power curves (Figure 17), the curve complementation of this electronic rate curve and Figure 16 also can compensate excessive in case of necessity.With a little d.c. motor, it is complementary that this second method is realized.The 3rd method used a heat responsive element such as a bimetallic element, and this element can mechanically change the passage of liquid detergent and regulate flow velocity.Especially, in passage, added conical bimetal tube 40 as shown in figure 18.This bimetal tube is outwards distortion in response to lower temperature, thereby has formed the passage that strengthens, and opposite, and it to internal strain, thereby has formed narrower passage in response to higher temperature.The 4th method used well heater 140(Fig. 4 of the lower position that is installed in groove 23).The electric power that is added to well heater is subjected to control from the signal of temperature-sensitive sticker to suppress the change of oneself viscosity.This method is not suitable for recommending, because although washing operation uses 40 milliliters washing agent each time, but can be stored in the groove 23 for 2,000 milliliters of liquid detergents that used in about month, and electric power consumption be wasted in irrelevantly whole storage capacity heated on.
Refer again to Fig. 8, will very describe the demonstration of operation in detail.Display part 52 comprises the indicator for water level, rinsing, power supply and wash time, and they use light emitting diode.
Water level shows and represents by peak level to lowest water level with " height ", " medium ", " low ", " very low " four grades.As previously mentioned, the water level demonstration shows corresponding to the fabric amount.
When connecting any one main operation key, according to simplified flow chart water supply start indicated among Fig. 9.Meanwhile, the water level display indicator one after the other from " high, glimmer to " medium ", " low " and " very low ", by inswept all indicators, repeat this flicker in turn.
When water level arrives " very low " level, stop to supply water and allow to stir the fabric amount of handling to measure.Before finishing fabric measurement amount, " very low " indicator is continuing always and is glimmering.Subsequently, supply water again, till reaching the corresponding water level of fabric amount that records with agitation, and by this water level of the corresponding indicator for displaying of flicker,
Operate in such a way, till the water level that has determined corresponding to the fabric amount that records, come the display operation process, to guarantee the directly visible identification of water level decision process (fabric amount testing process) by skimming over all water level display indicators.Show the display device that does not need other indicator just can help constituting compactness for water level.
After in the embodiment in front, reaching the level of " very low ", carry out the measurement of fabric amount, but the measurement of fabric amount can be carried out before water supply or in the water supply process also in water supply.In water supply process, measure the fabric amount and can shorten time before the washing process.Do not having under the situation about supplying water, measure the fabric amount does not need to stop to supply water temporarily, has correspondingly simplified the control of supplying water.A spot of soft relatively article to be washed are suitable for not having water gaging fabric amount.
In water supply process, stir and to be soaked in a large amount of article to be washed in the water earlier, and the fabric measurement amount of following can begin in early.Just stir after finishing up to the water supply till " very low " water level and can reduce water level (especially when the fabric amount is big) greatly, this causes the out of true of fabric measurement amount.Can eliminate this inconvenience and in water supply process, stir.
As mentioned above, automatic washing machine realization optimization washing operation is realized by following manner: the accurate fabric amount of measuring article to be washed; According to the fabric amount decision output, washing agent injection rate IR, stirring time and the rinsing time that record; Finish refined control with fixed output of accurate injection and fixed detergent amount; And the arrangement of meticulous control has been made in utilization.
Table 3
The ambient temperature range T of section
1T
2T
3T
4T
5T
6T
7T
8T
n
Driving time a b c d e f g h ... x
Table 2
Fabric amount Th die-away time of washings
Very little by 0.2～0.3
Little by 0.16～0.2
Medium 0.1～0.16
Specified 0.1＞
Table 1
The automatic injection rate IR of washing agent (index)
Fabric amount (water level) is specified medium little very little
The key of selecting (height) (medium) (low) (very low)
General dirty 10 864
Claims (5)
1, a kind of level switch is characterized in that comprising:
A coil;
A magnetic element and a film, this magnetic element can move and as a core slidably, above-mentioned film is connected with above-mentioned magnetic element and moves according to the change of water level relative to described coil;
A LC oscillatory circuit, it comprises described coil and a capacitor, and the reactance of coil relatively moves and changes with above-mentioned magnetic element, and the oscillation frequency of above-mentioned LC oscillatory circuit changes along with the reactance of said coil; And
Be used to detect the device (for example microcomputer) of above-mentioned LC oscillatory circuit frequency, this oscillation frequency changes with the change of water level.
2, a kind of water level detecting device according to claim 1 is characterized in that, said LC oscillatory circuit comprises a phase inverter.
3, a kind of level switch is characterized in that comprising:
A coil;
One removable and be attached to a magnetic element on the film with respect to described coil, and described film moves according to the air pressure variations relevant with SEA LEVEL VARIATION.Magnetic element moves moving mobile relevant with described film for described coil, thereby the reactance that makes described coil is along with magnetic element changes for the displacement of described coil;
The film application of force is made it to return to the elastic device of original state;
Comprise the LC oscillatory circuit of a described coil and a capacitor, the oscillation frequency of described LC oscillatory circuit changes with the variation of described coil reactance; And
Detect the device (such as a computing machine) of described LC oscillatory circuit oscillation frequency, this oscillation frequency changes with the variation of water level.
4, a kind of level switch according to claim 3 is characterized in that said water level sensor comprises:
The base that has the pressure transfer port, by this transfer port, pressure is sent to said film, and said film invests on the said base;
Support the plunger of said magnetic element, said plunger places one side relative with one side of bearing pressure of film; And
Elastic device, it is used for said mould to bearing beyond the pressure, and said elastic device places on the said plunger.
5, a kind of water level detecting device according to claim 4 is characterized in that the pressure transfer port of said water level sensor links to each other with the water inlet (2b) of washing machine water jacket (2) bottom by a pipe (5).
Applications Claiming Priority (11)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP218420/84 | 1984-10-19 | ||
| JP59218420A JPS6198295A (en) | 1984-10-19 | 1984-10-19 | Washer |
| JP218421/84 | 1984-10-19 | ||
| JP222137/84 | 1984-10-24 | ||
| JP9074/85 | 1985-01-23 | ||
| JP9075/85 | 1985-01-23 | ||
| JP14780/85 | 1985-01-29 | ||
| JP14784/85 | 1985-01-29 | ||
| JP14781/85 | 1985-01-29 | ||
| JP164733/85 | 1985-07-25 | ||
| JP60164733A JPS6226096A (en) | 1985-07-25 | 1985-07-25 | Washing machine |
Related Parent Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85107630.0A Division CN1005490B (en) | 1984-10-19 | 1985-10-17 | Wholly automatic washing machine |
| CN85107630 Division | 1989-03-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1037938A CN1037938A (en) | 1989-12-13 |
| CN1013708B true CN1013708B (en) | 1991-08-28 |
Family
ID=26489730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89101604 Expired CN1013708B (en) | 1984-10-19 | 1985-10-17 | Water level detector of fully automatic washer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1013708B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR0176863B1 (en) * | 1995-11-18 | 1999-05-15 | 구자홍 | Water level sensing method using weight sensor |
| IN2013MU02577A (en) * | 2013-08-05 | 2015-06-12 | Marc Ltd T |
-
1985
- 1985-10-17 CN CN 89101604 patent/CN1013708B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1037938A (en) | 1989-12-13 |
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