US3613405A - Washing machine - Google Patents

Washing machine Download PDF

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US3613405A
US3613405A US876283A US3613405DA US3613405A US 3613405 A US3613405 A US 3613405A US 876283 A US876283 A US 876283A US 3613405D A US3613405D A US 3613405DA US 3613405 A US3613405 A US 3613405A
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Prior art keywords
rinsing
switch
water
time
washing
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Expired - Lifetime
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US876283A
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English (en)
Inventor
Kazuo Shimokusu
Takashi Korekawa
Taro Yamamoto
Takao Kobayasi
Tomoyuki Hosokawa
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Panasonic Holdings Corp
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Matsushita Electric Industrial Co Ltd
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F13/00—Washing machines having receptacles, stationary for washing purposes, with agitators therein contacting the articles being washed 
    • D06F13/02—Washing machines having receptacles, stationary for washing purposes, with agitators therein contacting the articles being washed  wherein the agitator has an oscillatory rotary motion only
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F33/00—Control of operations performed in washing machines or washer-dryers 
    • D06F33/30—Control of washing machines characterised by the purpose or target of the control 
    • D06F33/32—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry
    • D06F33/38—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of rinsing
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • D06F34/22—Condition of the washing liquid, e.g. turbidity
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/02—Rotary receptacles, e.g. drums
    • D06F37/12—Rotary receptacles, e.g. drums adapted for rotation or oscillation about a vertical axis
    • D06F37/14—Ribs or rubbing means forming part of the receptacle
    • D06F37/145—Ribs or rubbing means forming part of the receptacle ribs or lifters having means for circulating the washing liquid
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/20—Washing liquid condition, e.g. turbidity
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/56—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers related to air ducts, e.g. position of flow diverters
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F33/00—Control of operations performed in washing machines or washer-dryers 
    • D06F33/30—Control of washing machines characterised by the purpose or target of the control 
    • D06F33/44—Control of the operating time, e.g. reduction of overall operating time
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/08—Control circuits or arrangements thereof

Definitions

  • a washing machine which comprises a time switch providing a series of automatic time cycles ranging from washing cycle through rinsing cycle to draining cycle, and in which particularly during the rinsing cycle a photosensitive element detects the transparency of the rinsing Water, thereby automatically detecting the completion of the rinsing operation or a point of time at which the concentration of the detergent in the rinsing water is lower than a predetermined level, so that a series of subsequent time cycles takes place.
  • This invention relates to a washing machine.
  • the rinsing operation effected by a washing machine is intended to remove dirt and detergent sticking to fiber products and thereby make the fiber products clean.
  • the length of time required for rinsing greatly varies with the quantity of the detergent and water used for the washing purpose.
  • the rinsing time judging from his past experience, taking into account such factors as the quantity of the clothes to be washed, the degree of dirt, the quantity of the detergent and water to be used.
  • the rinsing is effected for a fixed length of time in accordance with a program determined by the manufacturer of the washing machine.
  • the amount of rinsing operation to be effected by the washing machine has been determined in terms of time, and this has often caused the rinsing operation to continue for a longer time than necessary to thereby injure the quality of the fiber material as Well as to Waste water and power, or in some instances it has resulted in such an incomplete or insufficient rinsing effect that another rinsing operation is required.
  • FIG. 1 is a vertical sectional View of the washing machine according to a preferred embodiment of the present invention, particularly showing the piping arrangement associated with the rinsing detection means;
  • FIG. 2 is an enlarged sectional view showing the rinsing detection means
  • FIG. 3 is a graph for illustrating the relationship between the rinsing time and the transparency of the water
  • FIG. 4 is a graph for illustrating the relationship between the rinsing time and the resistance of the CdS
  • FIG. 5 is a graph for illustrating the relationship between the quantity of water supplied and the dilution ratio
  • FIG. 6 is a block diagram of the electrical circuit in the present invention.
  • FIG. 7 is an elevational view showing the gear train used inthe time switch
  • FIG. 8 is a chart showing the time cycles provided by the time switch
  • FIG. 9 shows a part of the chart of FIG. 8 in greater detail.
  • FIG. 10 is an enlarged sectional view showing another example of the rinsing detection means according to the present invention.
  • the washing machine includes a washing drum 1, a pulsator 2, an overflow port 3, a drain hose 4, a drain valve S, a water supply port 6, a sampling box 7 for detecting the concentration of a detergent, a luminous element 8 such as an incandescent lamp, and a photosensitive element 9 such as a CdS cell.
  • a washing drum 1 a washing drum 1
  • a pulsator 2 an overflow port 3
  • a drain hose 4 a drain valve S
  • a water supply port 6 for detecting the concentration of a detergent
  • a luminous element 8 such as an incandescent lamp
  • a photosensitive element 9 such as a CdS cell.
  • FIG. 2 there is shown an enlarged View of the sampling box 7, which includes an inlet pipe 10 communicating with the overflow port 3, an outlet port 11, an air hole 12, a projector window 14 formed of a material such as transparent glass or resin transmitting therethrough a sufficient quantity of light from the luminous element 8, and a light receiving window 15 formed of a material having the same properties as the projector window 14.
  • the luminous element 8 and photosensitive element 9 are disposed in a vertically opposed relationship with the sampling box 7 interposed therebetween.
  • the photosensitive element 9 is so arranged that it depends solely on the luminous element 8 for its light source and receives no other extraneous light such as the sunlight, etc.
  • this point of time is determined as the point of time for the completion of rinsing operation, it will be possible to automatically detect the completion of the rinsing.
  • FIG. 3 represents the experimental data indicating the variation of the illumination on the surface of the photosensitive element 9.
  • the luminous element is activated under a predetermined condition and the water supply is started at a predetermined ow rate (eg. litres per minute) to llow into the washing water containing a predetermined quantity of synthetic detergent solvent therein.
  • a predetermined ow rate eg. litres per minute
  • the illutnination on the surface of the photosensitive element 9 is about l lux.
  • the illumination becomes 23 luxes, which means an increase of illumination exceeding twenty times the initial level.
  • the illustrated embodiment employs CdS which is a typical material for the photosensitive element, and the variation in the resistance thereof is shown in the graph of FIG. 4.
  • the resistance of CdS is 9 kQ at the initial stage of the rinsing operation, but it begins to decline sharply 4 minutes later, and becomes 0.8 kt) 8 minutes later. This value is in accord with the level A for pure water, i.e. Water which is completely free of any detergent.
  • the values shown below the rinsing time in FIG. 4 indicate the dilution ratio of the detergent which changes from time to time, and these values can be theoretically determined from the quantity of the water supplied with respect to time.
  • Sucient rinsing effect may be provided if the dilution ratio is 100 or higher. However, assuming that the dilution ratio is set to 160, the level B represents the required operating level of the detector. Thus, when the resistance value of CdS becomes l kt?, the control circuit which will be described hereinafter operates detecting the completion of rinsing. It is possible, however, to set the dilution ratio to any desired value by adjusting the control circuit.
  • FIG. 5 is a graph for comparing the degree of rinsing effect accomplished by the prior art washing machine using the time control with that accomplished by the washing machine according to the present invention. It is seen from this graph that according to the prior art rinsing remains insucient if the rate of water supply is low, while it is excessively effected if the rate of water supply is high. In contrast, according to the present invention, the rinsing operation can be automatically carried out at a predetermined dilution ratio or at a predetermined rate of rinsing, irrespective of the rate of water supply.
  • the rinsing operation is completed within a shorter time if the water supply is greater, and it is continued until a predetermined dilution ratio is reached, if the water supply is smaller. This means that the rinsing operation never stops before the satisfactory result is achieved.
  • FIG. 6 shows an example of the entire electrical circuit incorporated in the washing machine according to the present invention.
  • the portion of the shown circuit which is encircled by the dotted line S relates to the control of a series of operative cycles, i.e. water supply, Washing, drainage, water supply, rinsing, drainage, as in the conventional washing machine.
  • the other portion of the circuit encircled by the dash-and-dot line K is a control circuit for detecting the completion of the rinsing operation.
  • the electrical circuit includes an A.C. power source having one end thereof connected with one end of a switch S4 or 2l contained in the time switch.
  • the switch S1 or 21 is a main switch through which the user of the washing machine can turn on or olf the power to the entire circuit.
  • the other end of the switch S1 or 21 is connected with the common contact of a switch S2 or 22.
  • the contact a of the switch S2 or 22 is connected with the common contact to a water level switch S4 or 24, whose contact a is connected with one end of the solenoid of a water supply valve 30.
  • the other end of the solenoid of the water supply valve 30 is connected with the other end of the A.C. power source 20.
  • the contact b of the switch S4 or 24 is connected with the common contact of a switch S6 or 26 contained in the time switch, and the contacts a and b of the switch S6 or 26 are connected with the windings of a pulsator drive motor 29, respectively.
  • the switch S6 or 26 is changed over from the contact u to b or conversely every 30 seconds so as to automatically reverse the pulsator drive motor 29 from its clockwise rotation to its counter-clockwise rotation.
  • the switch S3 or 23 connects the common contact of the switch S4 or 24 with the contact fz of the same switch, so that when the rinsing cycle begins the switch S3 or 23 is closed to actuate the water supply valve 30 so as to allow water to be supplied therethrough, irrespective of the position of the switch S4 or 24.
  • the contact b of the switch S2 or 22 is connected with one end of the solenoid of the drain valve 27, the other end of which is connected with the other side of the A.C. power source 20.
  • the common contact of the switch S or 25 is connected with the other end of the power source via the time switch drive motor 28, and the Contact a of the switch S5 or 25 is connected with the contact b of the switch S4 or 24.
  • the contact b of the switch S5 or 25 is connected with the contact b of the switch S2 or 22.
  • the primary winding of a transformer 31 for supplying a necessary power to the control circuit
  • the secondary winding of the transformer 3l is connected with the cathodes of rectiers 32 and 33, whose common anode is connected with one terminal of a smoothing capacitor 34.
  • the intermediate tap of the secondary winding of the transformer 31 is connected with the other terminal of the smoothing capacitor 34 so that a D.C. voltage is produced therebetween. Consequently, the potential becomes positive at the intermediate tap of the secondary winding of the transformer 31 and negative at the common terminal of the rectiflers 32 and 33.
  • a transistor 37 is also provided whose base is connected with the positive line through a Zener diode 36.
  • the base of the transistor 37 is also connected with the collector of the same transistor through a xed resistor 35, said collector in turn being connected with the negative line, to thereby constitute a yvoltage regulator circuit so that a constant D.C. voltage appears between points A and B.
  • This voltage energizes a lamp 49 so that a predetermined degree of illumination may be maintained irrespective of any variation taking place in the source voltage.
  • This precaution is necessary because the variation in the quantity of light ltered by the bubbles produced in the washing drum may be undetectable by the photosensitive element from the variation in the illumination of the lamp if the latter variation is significant and this may lead to a great error in the rinsing operation.
  • the emitter of the transistor 37 is connected with each one terminal of switch S10 or 46, electromagnetic clutch 45 and lamp 49.
  • the other terminal of the switch S40 or 46 is connected with the positive line through a serial connection of a fixed resistor 41, CdS photo-cell 42 and switch S9 or 43.
  • the emitter of the transistor 37 is connected with the contact u of '.1 switch S8 or 39 whose common Contact is connected with the positive line through a capacitor 40.
  • the Contact b of the switch S4 or 39 is connected between the fixed resistot- 41 and the CdS photo-cell 42, and further with one end of a potentiometer 44, the other end of which is connected with the positive side.
  • the movable contact of the potentiometer 44 is connected with the base of a transistor 47.
  • the potentiometer 44 serves as an adjuster for setting the degree of rinsing effect
  • the emitter of the transistor 47 is connected with the positive line through a xed resistor 48, while the collector of the transistor 47 is connected with the other end of the electromagnetic clutch 45.
  • the switch S9 or 43 operates in such a timed relation with the switch S6 or 26 as will be described hereinafter.
  • the control circuit thus arranged effects its detecting operation only while the switch S9 or 43 is closed, and thus this switch is a timing switch for detecting the degree of rinsing effect.
  • the switches S7 or 38 and S8 or 39 operate entirely in synchronism with each other; that is, during the period other than the rinsing cycles the switch S7 or 38 is open and the switch S8 or 39 closes its contact a. After the rinsing cycle begins, the switch S7 or 38 is closed while the switch S8 or 39 is changed over so as to close its contact b to detect the degree of rinsing effect.
  • the switch S or 46 is operatively interlocked with the electromagnetic clutch 45.
  • FIG. 7 ythere is schematically shown the interior mechanism and arrangement of the time switch.
  • the rotation of 4the time switch drive motor 28 is transmitted through a transmission gear 50 to a main cam group 51 and a dial shaft 52.
  • the transmission gear 50 is vertically displaced into a raised position as shown by dotted lines, so that the rotation of the time switch drive motor 28 is not transmitted to lthe cam group.
  • the switch S10 or 46 is urged to close its contact by the raised shaft of the transmission gear 50.
  • the electromagnetic clutch 45 is deenergized to return the transmission gear 50 to its original position to permit the rotation of the drive motor 28 to ybe transmitted again and to open the switch 'S10 or 46 to bring the entire arrangement to its initial state.
  • the switches S1, S2, S3, S4, S5, S7 and S8 or 21, 22, 23, 24, 25, 38 and 39 are actuated by the main cam group 51, while the switches S6 and S9 or 26 and 43 are actuated by a cam (not shown) provided between the time switch drive motor 28 and the transmission gear 50.
  • the other switch S10 or 46 is actuated by the electromagnetic clutch 45 as previously described.
  • the washing operation is started by placing the clothes to be washed in the washing drum and rotating the dial shaft 52 to set it at the starting position.
  • the time cycle representing the operative relationship of the various switches is shown in FIG. ⁇ 8, in which thick solid lines denote the closing of the switch contacts.
  • the water level switch S4 or 24 changes over to close its contact b to thereby stop the water supply and to energize the pulsator drive motor 29 which is thus driven for rotation to star-t the washing operation.
  • the time switch drive motor 28 also starts rotating, so that the switch S6 or 26 changes over to alternately close its contacts a and b every 30 seconds to automatically reverse the rotation of the pulsator 2.
  • the rotation of the time switch drive motor 28 also causes the rotation of the main cam group 51 and dial shaft S2 which controls the associated switches through the transmission gear 50. After the washing time has passed in this way, the switch S2 or 22 changes over to close its contact a, thus permitting the water supply to be resumed.
  • the switch S4 or 24 changes over to close its contact b so as to rotate the pulsator drive motor 29, while the switch S3 or 23 remains closed to continue the water supply, and thus the rinsing operation begins with the water overflowing lthrough the overflow port 3.
  • the transformer 31 connected in parallel therewith produces a predetermined A.C. voltage in the secondary winding thereof.
  • the A C. voltage is converted into a D.C. voltage -by the recters 32 and 33 and smoothing capacitor 34 and then adjusted to a predetermined DJC. voltage level by the Zener diode 36, xed resistor 35 and transistor 37.
  • the switch S8 or 39 since the switch S8 or 39 has its contact a closed now, the capacitor 40 is electrically charged at the above-mentioned predetermined voltage.
  • the circuit begins to detect the degree of rinsing effect upon the lapse of a predetermined time after the rinsing cycle starts.
  • the purpose of setting such a predetermined time is to provide a length of time to sufficiently stir the detergent and dirt sticking to the washed fabric and the inner wall of the washing drum to thereby permit uniformly stirred overflow to ow into the sampling box 7, and to prevent any erroneous detection.
  • the switch S7 or 38 When that predetermined time has passed, the switch S7 or 38 is closed to light the lamp at a predetermined intensity by the aforementioned constant D.C. voltage. Simultaneously, the switch S8 or 39 changes over to close its contact b whereby the charge stored in the capacitor 40 is discharged as the base current of the transistor 47, which is thus switched on to actuate the electromagnetic switch 45 so as to lbring the transmission gear 50 into the raised position as shown by dotted lines in FIG. 7.
  • the switch S9 or 43 operatively associated with the switch S6 or 26 closes its contact only for 3 seconds at intervals of 6.0 seconds so as to connect the CdS photocell 42 with the control circuit, whereby the monitoring of the rinsing effect is maintained.
  • the switches S6 or 26 and S9 or 43 are in such a relationship as shown in FIG. 8, and the relationship is shown by enlargement in FIG. 9.
  • the pulsator drive motor 29 stops its rotation for 3 seconds to reverse the direction of rotation. Five seconds prior to this stoppage, the switch S9 or 43 closes its contact only for 3 seconds. This closing of the switch S9 or 43 takes place at intervals of one minute, and this means that the switch 'S9 or 43 is closed only while the pulsator is rotating in a particular direction.
  • a timing relation is establishd so that the detection of rinsing effect may be carried out only while the pulsator is rotating in the particular direction.
  • any other timing scheme may be employed if the switch S9 or 43 is arranged only so as not to be closed during the while the pulsator is stopped to reverse the direction of rotation and during the short period immediately after the pulsator has again started its rotation. This is because when the pulsator is rotating its centrifugal force causes the water level to be higher in the area adjacent to the overflow port than at the center,
  • the switch S9 or 43 is provided and set to a certain relationship with the switch S6 or 26 which controls the pulsator drive motor 28. According to the present embodiment, this relationship is as shown in FIG. 9.
  • This relationship is not necessarily critical when use is made of the illustrated type of sampling box, whereas it is important in order to prevent any possible malfunction when use is made of other types of sampling boxes, for example, the one of such a type that is mouated at a suitable location between the bottom of the washing drum and the overow port in such a manner as to permit rinsing water to be forced into the sampling box by the water supply stream and in which the detection is made not of the transparency of the overflown rinsing water but of the transparency or light transmissivity of part of the rinsing water in the washing drum.
  • the pulsator may generally take an impeller-like shape which produces different types of water streams for clockwise rotation and counter-clockwise rotation, and accordingly the manner in which the bubbles are formed in the body of rinsing water in the washing drum is also different depending on the rotational direction of the pulsator.
  • This difference in the bubble formation affects the light transmissivity of the rinsing water.
  • the resistance of CdS is smaller for the clockwise rotation of the pulsator, while it is greater for the counter-clockwise rotation of the pulsator.
  • the resistance of the CdS varies with each reversal of the pulsators rotation, and the respective values gradually decrease as water supply and rinsing operation proceed.
  • the detection of rinsing effect should be accomplished by detecting only the degree of rinsing.
  • the switch S9 or 43 is set to operate at time intervals of one minute for the purpose of energizing the control circuit only in the Iperiod during which the pulsator is rotating clockwise, for example.
  • the detection of the rinsing effect is done at interi vals of one minute. If, however, the switch S9 or 43 is open, the transistor 47 is rendered conductive by its base voltage determined by the fixed resistor 4l and the position of the movable contact of the potentiometer 44. When the switch S9 or 43 closes its contact, the CdS 42 will be connected in parallel with the potentiometer 44. The resistance value of the CdS 42 is so high as to ensure the base voltage required to maintain the transistor 47 is conductive, but as the rinsing operation proceeds to increase the dilution ratio, the quantity of light received by the CdS is also increased as described with respect to FIG.
  • the degree of rinsing effect may be adjusted as desired by means of the potentiometer 44.
  • the capacitor 40 is connected in parallel with the CdS 42 for the following reason. If the detergent in the washing drum should be insufficiently stirred and thereby cause a part of the water in the washing drum to be lower in the concentration of the detergent, no bubbles would be produced even when such water overflows and falls into the sampling box 7. If the switch S9 or 43 happens to close at this moment, the absence of bubbles in the sampling box would cause the circuit to operate. However, such a phenomenon is usually momentary, and the erroneous operation due to such a phenomenon can be prevented by keeping the detector inoperative by the delaying effect of the capacitor 40.
  • the capacitor 40 is directed to the purpose of preventing any malfunction as well as of forcing the transistor 47 into conductive state at the starting point of the operation of the control circuit to thereby actuate the electromagnetic clutch 45.
  • the electromagnetic clutch 45 is electrically disconnected to return the transmission gear 50 to its original position shown by solid lines in FIG. 7, whereby the rotation of the time switch drive motor Z8 is again transmitted through the gear 50 to the main cam group 5l and dial shaft 52 while the switch S10 or 46 is opened so as to never to allow the base current of the transistor 47 to flow.
  • the electromagnetic clutch will never operate.
  • the switch S10 or 46 is provided in operative association with the electromagnetic clutch.
  • the switch S7 or 38 opens to cut off the power to the control circuit and the switch S8 or 39 returns to the contact a position, thereby resetting the circuit to its initial position.
  • the positional relationship between the switches becomes the same as that during the first draining operation so as to drain the water from the washing machine.
  • the switch S1 or 21 opens to cut off the power to the entire electrical circuit and complete the entire washing cycles.
  • the rinsing cycle takes place after the cycles of water supply, washing, drainage and water supply, and upon the lapse of a predetermined time after the rinsing cycle begins, the degree of rinsing effect is examined. If the rinsing effect is found to be still insufficient, the main cam group 51 of the time switch is stopped from rotating, and it is re-started when a sufficient rinsing effect would be attained. Thus, drainage is started upon lapse of a time which is sufficient to provide a complete and satisfactory rinsing effect.
  • variable impedance elements For example, a thyristor may be used, being driven by the charge stored in the capacitor.
  • FIG. l0 shows another example of the sampling box.
  • some of the overflow from the overow port ows through a branch pipe C into a drain hose 4 while the other part D of the overflow passes through the sampling box 7 into the drain hose 4.
  • the sampling box 7 there are produced bubbles by the falling water as previously described. Beneath the bubbles the overilow water maintains a certain water level F.
  • all the overow flows through the sampling box 7 and therefore, if the rate of water supply is increased, the overflow is also increased to raise the water level F.
  • the branch pipe C provided at the entrance to the sampling box 7 serves to maintain the inflow of water at a constant rate and accordingly the water level F is also maintained at a suitable height, whereby stable operations are ensured even if the rate of water supply varies.
  • a washing machine comprising a washing drum, a pulsator mounted within said washing drum, a time switch providing a series of cycles from washing through rinsing to drainage, and rinsing detection means for stopping the drive of said time switch during the rinsing cycle until the rinsing cycle is completed, said rinsing detection means having a luminous element and a photosensitive element for detecting the transparency of washing water, and control means for controlling the drive system of said time switch and the photosensitive element circuit, whereby completion of the rinsing cycle is automatically detected by the variation in the output of said photosensitive element, wherein said time switch comprises a motor, a transmission gear actuated byv an electromagnetic clutch, and a main cam group for controlling various switches, said main cam g-roup receiving the rotation of said motor transmitted through said transmission gear to thereby control said various switches, whereby said electromagnetic clutch energized in accordance with the operation of said electrical rinsing detection circuit engages and disengages said transmission gear with its associated gear train so as to
  • a washing machine comprising a washing drum, a pulsator mounted within said washing drum, a time switch providing a series of cycles from washing through rinsing to drainage, and rinsing detection means for stopping the drive of said time switch during the rinsing cycle until the rinsing cycle is completed, said rinsing detection means having a luminous element and a photosensitive element for detecting the transparency of washing water, and control means for controlling the drive system of said time switch and the photosensitive element circuit, whereby completion of the rinsing cycle is automatically detected by the variation in the output of said photosensitive element, wherein said pulsator automatically reevrses its rotation, and said rinsing detection circuit is operable in synchronism with a switch for automatically reversing the rotation of said pulsator.
  • a washing machine wherein said pulsator automatically reverses its rotation, and said rinsing detection circuit is operable only when said pulsator is rotatingin one of its rotational directions.
  • a washing machine comprising a washing drum, a pulsator mounted Within said washing drum, a time switch providing a series of cycles from washing through rinsing to drainage, and rinsing detection means for stopping the drive of said time switch during the rinsing cycle until the rinsing cycle is completed, said rinsing detection means having a luminous element and a photosensitive element for detecting the transparency of washing water, and control means for controlling the dri-ve system of said time switch and the photosensitive element circuit, whereby completion of the rinsing cycle is automatically detected by the variation in the output of said photosensitive element, wherein said rinsing detection means includes a sampling box disposed at a location of the washing drum so as to permit washing water to be flowed into and out of said sampling box by a stream of water supply, and said luminous element and photosensitive element are disposed in opposed relationship with said sampling box interposed therebetween, and further wherein means is provided to stir the rinsing water in said sampling box with
  • a washing machine comprising a washing drum, a pulsator mounted within said washing drum, a time switch providing a series of cycles from washing through rinsing to drainage, and rinsing detection means for stopping the drive of said time switch during the rinsing cycle until the rinsing cycle is completed, said rinsing detection means having a luminous element and a photosensitive element for detecting the transparency of washing water, and control means for controlling the drive system of said time switch and the photosensitive element circuit, whereby completion of the rinsing cycle is automatically detected by the variation in the output of said photosensitive element, wherein said rinsing detection means includes a sampling box disposed at a location of the washing drum so as to permit washing water to be owed into and out of said sampling box by a stream of water supply, and said luminous element and photosensitive element are disposed in opposed relationship with said sampling box interposed therebetween, and further wherein a branch pipe and an air hole are provided in the vicinity of the entrance to said sampling box connected with said

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
US876283A 1968-11-15 1969-11-13 Washing machine Expired - Lifetime US3613405A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP43084350A JPS4918187B1 (de) 1968-11-15 1968-11-15

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US3613405A true US3613405A (en) 1971-10-19

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US876283A Expired - Lifetime US3613405A (en) 1968-11-15 1969-11-13 Washing machine

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US (1) US3613405A (de)
JP (1) JPS4918187B1 (de)
DE (1) DE1957422C3 (de)
FR (1) FR2023381A1 (de)
GB (1) GB1258839A (de)
NL (1) NL150532B (de)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2501969A1 (de) * 1975-01-18 1976-07-22 Licentia Gmbh Steuerung von wasch- oder geschirrspuelmaschinen
US4237565A (en) * 1978-06-12 1980-12-09 Tokyo Shibaura Denki Kabushiki Kaisha Automatic washing machine
US4372134A (en) * 1980-02-01 1983-02-08 Tokyo Shibaura Denki Kabushiki Kaisha Washing machine
US4406028A (en) * 1980-06-18 1983-09-27 U.S. Philips Corporation Method of detecting the release of dye from laundry during a washing operation in a washing machine and implementation of said method
US4653294A (en) * 1984-12-28 1987-03-31 Sharp Kabushiki Kaisha Washing machine
US5259219A (en) * 1992-05-01 1993-11-09 General Electric Company Sensor holder for a machine for cleansing articles
US5341661A (en) * 1993-12-15 1994-08-30 General Electric Company Sensor holder having a container with a projection for collecting fluid samples in a machine for cleansing articles
US20060054196A1 (en) * 2004-09-14 2006-03-16 Lg Electronics Inc. Dishwasher
US20060060226A1 (en) * 2004-09-22 2006-03-23 Lg Electronics Inc. Dishwasher and control method thereof
US20060143836A1 (en) * 2005-01-06 2006-07-06 Samsung Electronics Co., Ltd. Washing machine and method for controlling supply of water thereof
US20070143933A1 (en) * 2005-12-22 2007-06-28 Potyrailo Radislav A Method and apparatus for controlling a laundering process
US20070272283A1 (en) * 2004-09-14 2007-11-29 Lg Electronics, Inc. Dishwasher and a Method for Controlling the Same

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI773869A (fi) * 1977-12-20 1979-06-21 Asko Upo Oy Foerfarande och anordning foer styrning av skoeljningen i en tvaettmaskin
DD145031A3 (de) * 1978-06-12 1980-11-19 Sonja Panhans Einrichtung zur steuerung des waschprozesses in haushaltwaschmaschinen
DE2949254A1 (de) * 1979-12-07 1981-06-25 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Verfahren und vorrichtung zum ueberwachen und steuern des programmes, insbesondere des wasserzulaufs und/oder der reinigungs- bzw. spuelmittelzugae bei automatischen wasch- und geschirrspuelmaschinen
DE2950929B1 (de) * 1979-12-18 1981-04-16 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Verfahren zum Spuelen von in einer programmgesteuerten Waschmaschine gewaschener Waesche
IT1187274B (it) * 1985-02-28 1987-12-23 Zanussi Zeltron Inst Dispositivo per il controllo di una soluzione di lavaggio contenente sostanze tensioattive
IT1187273B (it) * 1985-02-28 1987-12-23 Zanussi Zeltron Inst Macchina automatica per il lavaggio di articoli in un contenenete sostanze tensioattive
DE4104151A1 (de) * 1991-02-12 1992-08-13 Miele & Cie Waeschebehandlungsmaschine
JPH0793918B2 (ja) * 1992-02-04 1995-10-11 三洋電機株式会社 食器洗い乾燥機の制御装置
DE4342272B4 (de) * 1993-12-10 2004-01-29 BSH Bosch und Siemens Hausgeräte GmbH Verfahren und Meßanordnung zum Bestimmen des Niveaus, der Trübung und des Schaumanteils der Lauge in einer automatisch steuerbaren Wasch- oder Geschirrspülmaschine
IT1392420B1 (it) † 2008-12-22 2012-03-02 Indesit Co Spa Lavastoviglie.

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2501969A1 (de) * 1975-01-18 1976-07-22 Licentia Gmbh Steuerung von wasch- oder geschirrspuelmaschinen
US4237565A (en) * 1978-06-12 1980-12-09 Tokyo Shibaura Denki Kabushiki Kaisha Automatic washing machine
US4372134A (en) * 1980-02-01 1983-02-08 Tokyo Shibaura Denki Kabushiki Kaisha Washing machine
US4406028A (en) * 1980-06-18 1983-09-27 U.S. Philips Corporation Method of detecting the release of dye from laundry during a washing operation in a washing machine and implementation of said method
US4653294A (en) * 1984-12-28 1987-03-31 Sharp Kabushiki Kaisha Washing machine
US5259219A (en) * 1992-05-01 1993-11-09 General Electric Company Sensor holder for a machine for cleansing articles
US5341661A (en) * 1993-12-15 1994-08-30 General Electric Company Sensor holder having a container with a projection for collecting fluid samples in a machine for cleansing articles
US20060054196A1 (en) * 2004-09-14 2006-03-16 Lg Electronics Inc. Dishwasher
US20070272283A1 (en) * 2004-09-14 2007-11-29 Lg Electronics, Inc. Dishwasher and a Method for Controlling the Same
US7540293B2 (en) * 2004-09-14 2009-06-02 Lg Electronics Inc. Dishwasher
US7836535B2 (en) 2004-09-14 2010-11-23 Lg Electronics Inc. Dishwasher and a method for controlling the same
US20060060226A1 (en) * 2004-09-22 2006-03-23 Lg Electronics Inc. Dishwasher and control method thereof
US20060143836A1 (en) * 2005-01-06 2006-07-06 Samsung Electronics Co., Ltd. Washing machine and method for controlling supply of water thereof
US20070143933A1 (en) * 2005-12-22 2007-06-28 Potyrailo Radislav A Method and apparatus for controlling a laundering process
US7690061B2 (en) * 2005-12-22 2010-04-06 General Electric Company Method and apparatus for controlling a laundering process

Also Published As

Publication number Publication date
NL6917154A (de) 1970-05-20
DE1957422B2 (de) 1974-01-17
FR2023381A1 (de) 1970-08-21
GB1258839A (de) 1971-12-30
NL150532B (nl) 1976-08-16
DE1957422A1 (de) 1970-05-27
DE1957422C3 (de) 1975-09-25
JPS4918187B1 (de) 1974-05-08

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