JP2004358274A - Washing machine and cleaning machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To supply a washing machine that can well wash and eliminate bacteria by utilizing electrolysis. <P>SOLUTION: When an electrolytic unit 31 starts working, the power is first supplied to an electrode 31. When 4 seconds pass, it judges whether or not the power supply current value detected immediately before that exceeds the target current value of 3.5 A. If the power supply current value is judged to be more than the target current value, it stops power supply and decides the power supply stop time according to the power supply current values. In other words, it makes the power supply time and the average value of the power supply current in one cycle of the power supply stop time be the target current value. As the target current value is set at 3.5 A and the power supply time is set at 4 seconds in this practice system, if the power supply current is, for example, 7 A, the power supply stop time becomes 4 seconds. The power supply current value is detected even while the power to the electrode 33 is stopped. If the current flowing is detected, the power supply control is stopped. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a washing machine such as a fully automatic washing machine, a drum-type washing machine, and a two-tub washing machine. The present invention also relates to a washing machine for washing an object to be washed, such as a washing machine and a dishwasher.

  In a washing machine (washing machine), washing is usually performed using a detergent. For example, in a fully automatic washing machine, water in which a detergent is dissolved (washing liquid) is stored in a washing and spin-drying tub, and a pulsator arranged at the bottom is rotated to generate a water flow and agitate the washing to wash the laundry. We are washing. That is, the dirt on the laundry is removed by the mechanical force of the pulsator and the effect of the detergent.

  By the way, in such a washing machine, there is a demand to reduce the amount of detergent used in order to suppress the cost for the washing operation.

  Therefore, an electrolytic device that electrolyzes the water stored in the washing tub is provided, and instead of the washing process of washing the laundry using a conventional detergent, mechanical power is applied to the laundry while electrolyzing with the electrolytic device to wash the laundry. It is conceivable to realize a washing machine that performs an electrolytic washing step of washing an article.

  In the electrolytic washing process, dirt is removed from the laundry mainly by the mechanical force of the pulsator. The peeled dirt is decomposed by the active oxygen generated by the electrolysis, thereby preventing the dirt from re-adhering to the laundry. In this way, the laundry can be cleaned without using a detergent.

There is also a demand for removing bacteria from laundry at the same time as washing. On the other hand, after the washing step using a detergent or the above-described electrolytic washing step, electrolytic rinsing in which hypochlorite or hypochlorite ion generated by electrolysis by an electrolytic device is acted to disinfect the laundry. It is also conceivable to realize a washing machine that performs the process.
JP-A-7-80185

  However, in realizing such a washing machine, the following problems occur.

  The conductivity of tap water varies from region to region due to differences in the content of chlorine and the like. For this reason, the magnitude of the current flowing through the electrodes varies, and the electrolysis performance varies. As a result, there is a possibility that stable cleaning performance and sterilization performance cannot be obtained.

  Further, when the energizing circuit is broken for some reason, there is a possibility that the energizing of the electrodes is continued. In this case, undesired electrolysis may be performed.

  An object of the present invention is to provide a washing machine (washing machine) that can perform washing (washing) and sterilization using electrolysis in an excellent manner by solving such problems.

  A washing machine according to a first invention of the present application that solves the above-mentioned problems includes a washing tub for storing laundry, a washing unit for washing the laundry in the washing tub by mechanical force, and at least a pair of electrodes, An electrolytic means for electrolyzing water used for washing, and controlling operations of the washing means and the electrolytic means, and washing the laundry by the operation of the washing means using the electrolytic water generated by the operation of the electrolytic means; or A washing means comprising: a control means for performing a rinsing electrolytic washing step; and a current detecting means for detecting a magnitude of a current flowing to the electrode for electrolysis, wherein the control means While energizing, the energizing time in the intermittent energizing is fixed, and the energizing stop time in the intermittent energizing is lengthened as the current value detected by the current detecting means at energizing increases. It is characterized.

  A washing machine according to a second invention of the present application that solves the above-mentioned problems includes a washing tub that stores laundry, washing means for washing the laundry in the washing tub by mechanical force, and at least one pair of electrodes, An electrolytic means for electrolyzing water used for washing, and controlling operations of the washing means and the electrolytic means, and washing the laundry by the operation of the washing means using the electrolytic water generated by the operation of the electrolytic means; or Control means for performing a rinsing electrolytic washing process, comprising: current detection means for detecting the magnitude of current flowing to the electrode for electrolysis, wherein the control means comprises: In accordance with the current value detected in the above, the intermittent energization to the electrode is performed so that the average value of the energization current in one cycle of the energization time and the energization stop time becomes the target current value, and If the current by said current detecting means is detected within between is characterized in that the abnormality processing to stop the power supply to the electrode.

  A cleaning machine according to a third aspect of the present invention for solving the above problems includes a cleaning tank containing an object to be cleaned, cleaning means for cleaning the object to be cleaned in the cleaning tank, and at least one pair of electrodes. An electrolytic means for electrolyzing water used for controlling the operations of the washing means and the electrolytic means, and washing the object to be cleaned by the operation of the washing means using the electrolytic water generated by the operation of the electrolytic means; or Control means for performing a rinsing electrolytic cleaning step, comprising: current detection means for detecting the magnitude of current flowing through the electrode for electrolysis, wherein the control means The energization is performed, and the energization time in the intermittent energization is fixed, and the energization stop time in the intermittent energization is lengthened as the current value detected by the current detection unit during energization increases. To have.

  A cleaning machine according to a fourth aspect of the present invention for solving the above problems includes a cleaning tank containing an object to be cleaned, cleaning means for cleaning the object to be cleaned in the cleaning tank, and at least one pair of electrodes. An electrolytic means for electrolyzing water used for controlling the operations of the washing means and the electrolytic means, and washing the object to be cleaned by the operation of the washing means using the electrolytic water generated by the operation of the electrolytic means; or Control means for performing a rinsing electrolytic cleaning step, comprising: current detection means for detecting the magnitude of current flowing through the electrode for electrolysis, wherein the control means comprises: In accordance with the current value detected in the above, while intermittently energizing the electrode so that the average value of energizing current in one cycle of energizing time and energizing stop time becomes the target current value, If the current is detected by the serial current sensing means it is characterized in that the abnormality processing to stop the power supply to the electrode.

  In the configuration of the washing machine according to the first invention, the value of the current flowing to the electrode is detected, and intermittent energization is performed according to the current value so that the current value becomes substantially constant. That is, the energization time is fixed, and the energization stop time is lengthened as the current value increases, so that the average current value in one cycle between energization and energization stop is substantially constant. Thereby, the performance of the electrolysis can be stabilized, and as a result, the cleaning performance and the sterilization performance can be stabilized.

  In this configuration, the energizing current is detected at the time of energizing in the intermittent energizing, but if the energizing time is changed according to the energizing current value, the energizing is performed immediately after the energizing starts to determine the energizing time. The current value must be detected. In this case, since an inrush current flows at the beginning of energization, the inrush current is affected and an accurate energization current value cannot be detected. Therefore, the intermittent energization control according to the energization current value cannot be accurately performed. In this regard, in the above configuration, the energization time is fixed and the energization stop time is changed, so that current detection can be performed in the latter half of the energization time during which no inrush current is received, so that the energization current value is accurately detected. It is possible to perform highly accurate intermittent energization control.

  In the configuration of the washing machine according to the second aspect of the present invention, when the current is detected at the time of stopping the energization in the intermittent energization in which the current does not originally flow due to a failure of the switching element (transistor) for performing the intermittent energization in the energizing circuit, Abnormal processing to stop power supply to the server is performed. For example, a switch (such as a relay) for safety protection provided in series with the switching element in addition to the switching element is turned off. Alternatively, the power switch is turned off to shut off power to the washing machine. In the former case, the electrolysis cannot be performed, but the washing operation itself can be continued. In the latter case, the washing operation is stopped.

  Therefore, it is possible to prevent a problem that a current flows through the electrodes even when the energization is stopped and undesired electrolysis is performed.

  In particular, a switching element or the like often fails during intermittent energization control (during operation). In this configuration, current is detected when energization is stopped during this intermittent energization, so that a failure is quickly detected and detected. Response can be achieved.

  In order to notify the user of this abnormal state, a notification unit such as a display unit or a buzzer may be used to notify the abnormality by display or sound.

  In the configuration of the washing machine according to the third aspect of the present invention, the average current value in one cycle of energization and the stop of energization is substantially constant, as in the washing machine according to the first aspect of the invention. As a result, the cleaning performance and the sterilization performance can be stabilized. In addition, it is possible to reliably perform current detection at the time when no rush current is received, and it is possible to perform highly accurate energization control.

  In the configuration of the washing machine according to the fourth aspect of the present invention, similarly to the washing machine according to the second aspect of the present invention, current flows through the electrode even though power supply is stopped, and undesired electrolysis is performed. Such a problem can be prevented.

  Hereinafter, a washing machine according to the present invention and a fully automatic washing machine as an embodiment of the washing machine will be described with reference to the drawings. The left and right directions are as viewed from the front.

  FIG. 1 is a side sectional view showing a configuration of the fully automatic washing machine of the present embodiment. Inside the housing 1 of the washing machine, a cylindrical outer tub 2 having a bottom is provided with a front hanging rod 3 and a rear hanging rod 4 (one each of which is visible in the figure, but actually two each are present). ) So as to be inclined forward. The front upper portion of the housing 1 also protrudes in correspondence with the upper front projection of the outer tub 2. The front surface of the housing 1 has a large opening, and the opening 16 is detachably covered with a front panel 17. For this reason, the upper part of the front panel 17 projects over the upper part of the outer tub 2.

  Inside the outer tub 2, a washing and dewatering tub 5 having a large number of dewatering holes in a peripheral wall is rotatably supported about a dewatering tub shaft 6. The outer tub 2 and the washing and dewatering tub 5 constitute a washing tub (washing tub) of the present invention. At the bottom of the washing and dewatering tub 5, a pulsator 7 (corresponding to the washing means and washing means of the present invention) for generating a water flow in the outer tub 2 and stirring the laundry is arranged. A drive mechanism 10 for driving the pulsator 7 and the washing and dewatering tub 5 is provided at the bottom of the outer tub 2. The drive mechanism 10 includes a dewatering tank shaft 6, a blade shaft 9, which is a rotating shaft of the pulsator 7, a motor 8 provided coaxially with the dewatering tank shaft 6 and the blade shaft 9. 8 is provided with a clutch for switching between transmitting the power of 8 only to the blade shaft 9 or transmitting both the power to both the blade shaft 9 and the dewatering tank shaft 6. The drive mechanism 10 rotates only the pulsator 7 in one direction or both directions mainly during the washing operation and the rinsing operation, and integrally rotates the washing and dewatering tub 5 and the pulsator 7 in one direction (the forward rotation direction) during the spin-drying operation. ). The washing and spin-drying tub 5 makes one rotation when the motor 8 makes one rotation. On the other hand, since a reduction mechanism (not shown) is provided in the middle of the blade shaft 9, the pulsator 7 rotates according to the reduction ratio by the reduction mechanism.

  A water inlet 11 provided with a detergent container 12 for charging a detergent or the like accommodated therein is provided at the upper rear of the outer tub 2. The detergent container 12 is divided into a detergent accommodating portion 12a for accommodating a detergent and a finishing agent accommodating portion 12b for accommodating a soft finish.

  As shown in FIG. 5, a double water supply valve 13 for supplying tap water is provided on the right side of the water inlet 11. The first valve 13a of the water supply valve 13 is connected to the detergent container 12a, and the second valve 13b is connected to the finish agent container 12b. When the first valve 13a is opened, tap water flows into the detergent accommodating portion 12a from an external water tap or the like, and the tap water is discharged into the washing and dewatering tub 5 below. At this time, if detergent is contained in the detergent accommodating portion 12a, the detergent is put into the washing and dewatering tub 5 together with tap water. On the other hand, when the second valve 13b is opened, tap water flows into the finishing agent accommodating portion 12b from an external water tap or the like, and the tap water is discharged into the washing and dewatering tub 5 below. At this time, if a soft finish is put in the finish agent accommodating portion 12b, the soft finish is put into the washing and dewatering tub 5 together with tap water.

  A bath water pump 59 is provided on the left side of the water inlet 11. This bath water pump 59 is connected to the detergent accommodating section 12a, like the first valve 13a. When the bath water pump 59 is driven, the bath water flows into the detergent accommodating portion 12a, and the bath water is discharged into the washing and dewatering tub 5 below.

  One end of a drain pipe 14 is connected to the front end of the bottom of the outer tub 2, that is, the bottom, and the drain pipe 14 is opened and closed by a drain valve 15. Although not shown, the other end of the drain pipe 14 is connected to an external drain ditch via an upright drain hose. The opening / closing operation of the drain valve 15 is related to the above-described clutch switching operation. When the attached torque motor 26 (see FIG. 7) is not operating, the drain valve 15 is closed and the pulsator 7 is used for washing and washing. The pulsator 7 and the washing / dewatering tub 5 are connected with the drain valve 15 closed when the torque motor 26 is operated to pull the wire halfway. When the wire is further pulled, the drain valve 15 is opened while the pulsator 7 and the washing and dewatering tub 5 are connected.

  As described above, in the washing machine of the present embodiment, the outer tub 2 and the washing and dewatering tub 5 are inclined forward, so that the upper surface opening faces forward rather than vertically upward. That is, the center axis CL of the outer tub 2 is disposed so as to be inclined by a predetermined inclination angle α with respect to the vertical line VL. Therefore, the user standing in front of the washing machine can easily see the bottom of the washing and dewatering tub 5 and can easily take out the laundry. Here, if the inclination angle α is in the range of about 5 to 20 degrees, the laundry can be easily taken out sufficiently, and the protrusion of the housing 1 does not need to be too large. In this embodiment, the inclination angle α is set to about 10 degrees.

  An electrolyzer 31 (corresponding to electrolysis means of the present invention) is provided below the outer peripheral wall of the outer tub 2. The electrolysis apparatus 31 is formed as a unit, is formed separately from the outer tank 2, and is attached to the outer tank 2 with screws or the like. The electrolyzer 31 is provided on the front side of the outer tub 2. The electrolyzer 31 appears only by removing the front panel 17. With such a configuration, repair and replacement of the electrolytic device 31 can be easily performed.

  The electrolytic device 31 includes an electrolytic bath 32 provided as a separate chamber from the outer bath 2, a pair of electrodes 33 disposed in the electrolytic bath 32, and an upper portion connecting an upper portion 69 of the electrolytic bath 32 and the outer bath 2. It has a water passage 34 and a lower water passage 35 connecting the lower part of the electrolytic cell 32 and the outer tank 2.

  The electrolytic device 31 is mounted at a height such that at least a part of the pair of electrodes 33 is submerged when the level of the water stored in the outer tub 2 reaches the washing level.

  The pair of electrodes 33 includes a first electrode 33a and a second electrode 33b, and both the first electrode 33a and the second electrode 33b have a rectangular thin plate shape. The electrolytic cell 32 is formed in a thin box shape such that the depth dimension (see D1) with respect to the peripheral wall surface of the outer tank 2 is reduced. The first electrode 33a and the second electrode 33b are arranged in the electrolytic cell 32 at predetermined intervals in such a direction that the respective electrode surfaces face the outer peripheral wall of the outer cell. With such a configuration, the amount of the electrolysis device 31 projecting outward from the outer tub 2 can be suppressed, so that in the dehydration, the electrolysis device 31 can be prevented from colliding with the housing 1 when the outer tub 2 vibrates. . Therefore, it is possible to suppress an increase in the size of the housing 1.

  Meanwhile, it is also conceivable to form the electrolytic cell 32 of the electrolytic device 31 integrally with the outer tank 2 and attach the electrode 33 inside the outer tank 2. In such a case, it is difficult to assemble the electrode 33 inside the narrow outer tank 2, and it is difficult to remove the electrode 33 when performing maintenance or recycling. Therefore, the electrolysis apparatus 31 of the present embodiment has a water treatment unit 60 attached outside the outer tub 2.

  The water treatment unit 60 is configured to be integrally handled at the time of assembly. For example, the electrolyzer 32 and a pair of electrodes 33 disposed in the electrolyzer 32 are configured so as to constitute the above-described electrolyzer 31 alone. It has a pair of water passages 34 and 35 extending from the electrolytic cell 32. The electrolytic cell 32 and the pair of water passages 34 and 35 are integrally formed of a synthetic resin.

  As shown in FIG. 2, the water treatment unit 60 is attached to the lower part on the front side of the outer tub 2 on the right side when viewed from the front, and utilizes an empty space between a corner in the housing 1 and the outer tub 2. Is arranged. Further, the power supply circuit 30 (see FIG. 7) is electrically connected to the water treatment unit 60. The energizing circuit 30 has a transformer 61 and the like. The transformer 61 is usually heavy, but is stably fixed to a high-strength front portion 62 that forms a corner of the housing 1 and is shifted to the right when viewed from the front. Further, the transformer 61 may be attached to the bottom 64 of the outer tub 2. In this case, it is preferable to use the large weight of the transformer 61 to suppress the vibration of the outer tub 2.

  The water treatment unit 60 and the transformer 61 are located near the service opening 16 of the housing 1, and through the service opening 16, assembly work, maintenance work such as repair and replacement, disassembly work for recycling, and the like are easy. become. Also, since the water treatment unit 60 and the transformer 61 are close to each other, mutual electrical connection is easy. Furthermore, since the water treatment unit 60 and the transformer 61 are detachably fixed by screwing, they are preferable for the above-mentioned operation.

  Further, the water treatment unit 60 and the transformer 61 are attached to a motor rotation control electrical component, for example, a motor rotation sensor 24 (see FIG. 7) built in the motor 8, and a front surface 63 on the left side of the housing 1. The control circuit board 65 including the inverter drive unit 23 (see FIG. 7) is fixed at a position distant from the wiring components (not shown) for connecting these components. Thereby, it is possible to suppress the adverse effect of the noise generated during the electrolysis from the transformer 61 and the like on the rotation control of the motor 8.

  As shown in FIG. 3, the electrode 33 is arranged in parallel with the maximum surface of the thin box-shaped electrolytic cell 32, for example, in parallel with the front part 71, and has a flat plate shape having a size corresponding to the front part 71. Such an electrode 33 can have a large area, and the required surface area can be realized with a small number of electrodes 33. The electrodes 33 are formed by coating a thin film member serving as an oxidation catalyst on the surface of a base material, and are arranged to face each other. The base material is made of, for example, titanium, and the thin film member is made of, for example, platinum. Other examples of the thin film member include gold, palladium, platinum iridium, and titanium oxide. Each flat electrode 33 is held at opposing ends on both sides in a direction along the plate surface, and is maintained at a predetermined pitch between the electrodes. Voltages having opposite polarities are applied to the pair of electrodes 33 to electrolyze water.

  The electrodes 33 are not limited to a pair having opposite polarities. For example, three electrodes 33 may be arranged side by side with their plate surfaces facing each other. Alternatively, the five electrodes 33 may be arranged side by side with their plate surfaces facing each other. In these cases, the polarities of the electrodes 33 may be alternately switched so that two adjacent electrodes 33 have opposite polarities. In short, it is sufficient that at least a pair of electrodes 33 is provided. Hereinafter, a case where the pair of electrodes 33 is provided will be described.

  The upper and lower ends of the electrode 33 are held by the electrolytic cell 32. The upper end of the electrode 33 is held in a recess 77 formed inside the electrolytic cell 32. The concave portion 77 is defined between a pair of ribs standing upright on the upper surface portion 75 of the electrolytic cell 32 toward the inside. The lower end of the electrode 33 is held on the lower surface 76 of the electrolytic cell 32 via the terminal cover 85. The terminal cover 85 seals the space between the lower surface 76 of the electrolytic cell 32 and the lower end of the electrode 33 while covering the lower end of the electrode 33 so that lint does not accumulate. The electrodes 33 may be held on both left and right sides.

  It is preferable that the electrode pitch (see D2), more specifically, the interval between the electrodes 33 (see D3) be, for example, 2 mm or more and 5 mm or less. If the interval is less than 2 mm, the lint may easily adhere to the space between the electrodes 33, and the electrolysis efficiency may be reduced, and the durability may be reduced. . On the other hand, if the interval exceeds 5 mm, it is necessary to apply a high voltage in order to maintain high electrolysis efficiency, and it is difficult to construct a practical configuration. If the interval is 2 mm or more and 5 mm or less, high durability and high electrolytic efficiency can be realized practically.

  The electrolytic bath 32 may be made of a different material from the outer bath 2. On the other hand, the electrolytic cell 32 may be made of the same material as the outer tank 2. In this case, handling of the electrolytic cell 32 at the time of recycling becomes easy. For example, the material of the electrolytic cell 32 includes an olefin resin, for example, polypropylene (PP). This resin is also used for the outer tank 2 and can increase the chemical resistance to water containing chemicals such as detergents and bleaching agents. Further, it is preferable that the material of the electrolytic cell 32 includes a reinforcing material such as glass fiber, because the strength can be prevented from decreasing when the water temperature rises.

  As shown in FIGS. 3 and 4, the electrolytic cell 32 includes a lower surface portion 76, a front surface portion 71, a rear surface portion 72, a right side surface portion 73 and a left side surface portion 74 rising from the periphery of the lower surface portion 76, and a top surface portion 75. Have. The electrode 33 is arranged inside the area surrounded by each of the surface portions 71 to 76 so that water can be stored. The electrolytic cell 32 is formed so as to be thinner along the direction in which the front part 71 and the rear part 72 face each other. The electrode 33 is arranged substantially parallel to the front surface 71. The electrolytic cell 32 is composed of a pair of divided bodies 78 and 79 (see FIG. 2) that can be divided into upper and lower parts.

  The upper part 69 of the electrolytic cell 32 is inclined, and one side is higher, and the upper surface part 75 of the electrolytic cell 32 is inclined upward to the right in front view. The upper water passage 34 extends from the rear surface 72 corresponding to the raised position. A lower water passage 35 extends from a rear surface portion 72 which is a lower end position of the electrolytic cell 32.

  The pair of water passages 34 and 35 are arranged substantially in parallel with each other and along the vertical direction. The water passages 34 and 35 are pipes having circular cross sections, and are formed integrally with the rear surface 72 of the electrolytic cell 32. In addition, the pair of water passages 34 and 35 may be members that communicate the inside of the electrolytic bath 32 and the inside of the outer bath 2 and define a space through which water can pass. It may be formed separately from the tank 32 or may be formed integrally with the outer tank 2.

  Water flows into the electrolytic tank 32 from the outer tank 2 through the lower water passage 35, and the lower water passage 35 functions as an inflow passage. Further, water treated in the electrolytic cell 32 flows out to the outer tank 2 through the upper water passage 34. The upper water passage 34 functions as an outflow passage. Such a flow can be generated, for example, by a water flow in the outer tank 2 due to the rotation of the pulsator 7.

  The flow of water in the pair of water passages 34 and 35 is not particularly limited, and may be reverse to the above-described flow direction. In addition, a pair of water passages 34 and 35 corresponding to the inflow and the outflow only need to be provided, and at least one of these water passages is constituted by a plurality of water passages. For example, three or more water passages are provided. It is also conceivable to provide them. It is also conceivable to form a pair of water passages integrally. It is also conceivable to provide a single water passage. For example, it is conceivable to provide a pair of water channels for inflow and outflow in a single waterway without partitioning them, and to use the waterway for both inflow and outflow. Hereinafter, a case will be described in which the lower water passage 35 is an inflow passage and the upper water passage 34 is an outflow passage as described above.

  The pair of water passages 34 and 35 are connected to the outer tub 2 via a packing 81 as shown in FIG. The packing 81 is the same for both water passages 34 and 35, and the water passage 34 will be described.

  The packing 81 is made of an elastic member such as a cylindrical rubber. The inner periphery of the packing 81 is fitted on the outer peripheral surface of the water passage 34. The outer periphery of the packing 81 is fitted into the connection hole 67 on the outer surface 66 (peripheral wall surface) of the outer tub 2 from the outside of the outer tub 2. The packing 81 secures a long sealing distance between the tubular water passage 34 and the connection hole 67. The packing 81 is attached in a state where the packing 81 is compressed by a predetermined amount in the radial direction of the cylinder, and seals a gap between an inner periphery of the connection hole 67 and an outer periphery of the water passage 34. The packing 81 can be elastically deformed along the radial direction and the axial direction of the cylinder. Thereby, the packing 81 can absorb the respective dimensional errors of the corresponding connection hole 67 and the water passage 34. Further, the packing 81 can absorb a dimensional error between the pitch between the pair of water passages 34 and 35 and the pitch between the pair of connection holes 67. The packing 81 absorbs thermal deformation generated when hot water is stored in the outer tub 2 and can prevent breakage and water leakage. In addition, as the packing 81, an O-ring, a sheet-shaped member, or the like can be used in addition to the above-described cylindrical member.

  Further, in the electrolytic cell 32, a plurality of, for example, four mounting portions 80 for screwing to the outer tank 2 are formed near the pair of water passages 34 and 35. A screw 86 passing through the insertion hole of the mounting portion 80 is screwed into the boss 68 erected on the outer surface 66 of the outer tub 2 from the outside.

  The terminal 84 of the electrode 33 is led out through the lower surface 76 of the electrolytic cell 32 as shown in FIG. Accordingly, even if water droplets adhere to the outer wall of the electrolytic bath 32 due to dew condensation or overflow from the washing tub, such water droplets are unlikely to short-circuit the terminals 84 of the pair of electrodes 33. Thereby, insulation between the terminals 84 can be ensured. In addition, a partition plate 87 that partitions between the terminals 84 of the pair of electrodes 33 is provided. The partition plate 87 prevents the above-described movement of the water droplets, and can secure insulation. The partition plate 87 is also used as the mounting portion 80 formed integrally with the electrolytic cell 32, so that the number of parts can be reduced.

  The assembly of the water treatment unit 60 is performed as follows. In a state where the divided bodies 78 and 79 of the electrolytic bath 32 are separated, the electrode 33 is incorporated into one of the divided bodies 78. The pair of divided bodies 78 and 79 are combined, the joint is sealed, and the assembly of the water treatment unit 60 is completed. In the water treatment unit 60 having the box-shaped electrolytic tank 32, for example, the sealing performance and the electrolytic performance can be tested by itself before assembly into the outer tank 2. Then, the pair of water passages 34 and 35 are fitted into the connection hole 67 of the outer tank 2 from the outside via the packing 81. The mounting portion 80 of the electrolytic bath 32 is screwed and fixed to the boss 68 of the outer bath 2. The terminal 84 of the electrode 33 and the energizing circuit 30 are electrically connected. Further, the water treatment unit 60 can be removed from the outer tank 2 by performing the reverse operation. Maintenance work and disassembly work for recycling are easy.

  Since the water treatment unit 60 is attached to the outside of the outer tub 2 in this manner, the water treatment unit 60 can be assembled into the outer tub 2, maintenance work on the water treatment unit 60, disassembly work for recycling, and the like can be performed. Can be easily performed from the outside of the outer tub 2. Further, when the electrode 33 is arranged between the outer tub 2 and the washing and dewatering tub 5, an extra space in the outer tub 2 and extra water stored therein are required. When the unit 60 is attached to the outside of the outer tub 2, it is possible to prevent the above-mentioned extra space and water from being required.

  Here, as the water treatment unit 60 that is easy to work as described above, any water treatment unit may be used as long as it is formed separately from the outer tub 2 and can be handled integrally. For example, the water treatment unit 60 includes a pair of electrodes 33 and an attaching portion 80 for attaching to the outer tub 2, and is used alone or in cooperation with the outer tub 2 to electrolyze water used for washing. Any material may be used as long as it has a function of imparting cleaning performance to water without mixing a detergent.

  Further, by making the water treatment unit 60 detachable from the outer tank 2, the workability of detachment can be further improved. In particular, the electrode 33 containing a noble metal is preferable because it can be easily recycled.

  Further, since the water treatment unit 60 includes the electrolytic cell 32 and the pair of electrodes 33, the water treatment unit 60 can be handled alone at the time of assembly or maintenance, and the work is further facilitated.

  In addition, by holding the electrode 33 in both sides in the box-shaped electrolytic cell 32, strict attention is not required when handling the water treatment unit 60. Therefore, operations such as assembly, maintenance, and disassembly can be further facilitated. Further, even in the case where the washing and dewatering tub 5 is housed in the outer tub 2 and vibrates during dehydration, the electrode 33 is held firmly with both ends. This makes it difficult for the electrode 33 to fall off in the electrolytic cell 32.

  By providing the packing 81 interposed between the water treatment unit 60 and the outer tub 2, when the water treatment unit 60 is assembled to the outer tub 2, the elastic deformation of the packing 81 causes the outer tub 2 and the corresponding water The dimensional error between the water treatment unit 60 and the water treatment unit 60 can be absorbed, and the water treatment unit 60 and the outer tub 2 can be sealed easily. Accordingly, the bonding for sealing can be omitted, so that the labor for assembling can be reduced, and the disassembly and disassembly can be facilitated.

  Further, by providing the pair of water passages 34 and 35, the inflow and outflow of water between the electrolytic tank 32 and the outer tank 2 can be shared, and water is efficiently transferred between the electrolytic tank 32 and the outer tank 2. Since the water can be flown, the treated water can be supplied to the outer tub 2 without waste and can be effectively used for washing, and the cleaning power and the antibacterial power can be enhanced. In addition, the water from the outer tank 2 is caused to flow in the electrolytic tank 32, so that the electrolysis can be performed efficiently.

  By separating the pair of water passages 34 and 35 from each other, for example, it is possible to suppress the treated water from coming out of the electrolytic tank 32 and immediately returning to the electrolytic tank 32 later.

  By providing a pair of water passages 34 and 35 having different height positions in the thin box-shaped electrolytic tank 32 provided on the outer surface 66 of the outer tank 2, it is possible to suppress generation of water stagnation and air pockets, and Electrolysis can be carried out efficiently by flowing vertically (see arrows in FIG. 3).

  When water flows upward in the electrolytic cell 32, the upper water passage 34 is provided in the upper part 69 of the electrolytic cell 32, which is inclined upward, so that the water flows upward in the electrolytic cell 32. The water can be guided to the upper water passage 34 along the slope, and can be quickly discharged to facilitate the flow of the water. Further, the lower water passage 35 at the lower end of the electrolytic cell 32 can suppress generation of water stagnation in the electrolytic cell 32. Thereby, the water in the electrolytic cell 32 can be easily made to flow, which is preferable.

  As described above, it is preferable that the electrode 33 is installed in a place where water flows, so that electrolysis can be performed efficiently. In particular, it is more preferable that the electrode 33 is installed in a place where water can circulate in the outer tub 2, and the use efficiency of the electrolyzed water can be increased. For example, it is conceivable to provide a circulation mechanism for forcibly circulating the water in the outer tank 2 by sucking the water from the inlet through the inlet and out of the outlet, and disposing the electrode 33 in the circulation mechanism. The circulation mechanism can be constituted by a water passage formed of a water-permeable pipe connecting the lower part and the upper part of the outer tub 2, and an electric pump for flowing water through the water path. Such a configuration of the circulation mechanism is disclosed in Japanese Patent Application No. 2000-196894, which is another application of the present applicant. In addition, a known configuration for circulating water can also be used.

  Further, since the electrolytic cell 32 is formed in a thin box shape having a small depth dimension with respect to the outer surface of the outer tank 2, the protrusion of the water treatment unit 60 from the outer surface of the outer tank 2 can be reduced. For example, in the case of a thin electrolytic bath 32 along the outer surface 66 as the outer surface of the outer bath 2, a case for preventing the collision between the water treatment unit 60 and the case 1 during dehydration as described above. An increase in the size of the body 1 can be suppressed, and space can be saved. Further, in the case of a thin electrolytic tank 32 along the bottom 64 as the outer surface of the outer tank 2, the structure such as piping for draining from the electrolytic tank 32 after use can be simplified, and space can be saved. it can.

  Further, by providing the electrolytic bath 32 below the outer bath 2, for example, below the bottom 64 and the outer surface 66, water collected at a low water level in the outer bath 2 can also be used. For example, the electrolytic treatment can be performed in the middle of the water supply to the outer tub 2 to shorten the time for the electrolysis. Further, a course in which water is electrolyzed and used at a low water level can be realized.

  Further, by providing the electrolytic cell 32 on the outer surface 66 of the outer tank 2 and providing the water passage 35 at the lower end of the electrolytic tank 32, the water inside the electrolytic tank 32 can be drained from the outer tank 2 at the time of drainage from the outer tank 2. Through to the outer tank 2.

  Note that it is also conceivable to form at least a part of the electrolytic bath 32 integrally with the outer bath 2. In such a case, it is preferable that the electrolytic cell 32 is provided so as to protrude outward on the outer surface of the outer tank 2 or to form a depression on the inner surface of the outer tank 2. Thereby, since the inner shape of the outer tub 2 can be substantially maintained, it is possible to prevent the space efficiency in the outer tub 2 from lowering and to prevent unnecessary consumption of water. When the inner surface of the electrolytic bath 32 and the inner surface of the outer bath 2 are continuous, it is preferable that the inner surfaces be inclined to facilitate the flow of water between the outer bath 2 and the electrolytic bath 32.

  By the way, the water from the outer tub 2 may contain lint. If such lint adheres to the electrode 33, there is a concern that the durability of the electrode 33 is reduced or the electrolytic efficiency is reduced. For this reason, there is no problem even if yarn waste enters the water treatment unit 60 as described below.

  A corner 83 of the electrode 33 is rounded 83 (only a part is shown in FIG. 4). Thus, the edge can be prevented from being generated on the electrode 33, so that the lint is less likely to be caught on the corner portion 82 of the electrode 33 and easily separated. Therefore, even if the lint is caught, the lint can be autonomously separated from the corner portion 82 by the water flow.

  The roundness 83 includes not only the roundness seen when viewed from a direction perpendicular to the plate surface of the electrode 33 but also the roundness seen when viewed from a direction along the plate surface. The roundness may be provided in at least some of the corners, but is preferably provided in more corners, particularly in all the corners in the water.

  The distance (D3) between the electrodes 33 is set to a distance at which thread waste does not adhere. The distance is preferably, for example, 2 mm or more. This is because if the distance is less than 2 mm, yarn waste is likely to be clogged. Further, the distance (D4) between the electrode 33 and the electrolytic cell 32 may be the above-mentioned distance, or may be 0, that is, a gap may not be provided between the electrode 33 and the electrolytic cell 32.

  As a result, it is possible to prevent a decrease in the fluidity of water due to the attachment of the lint. In addition, it is possible to prevent the contact of the water with the electrode 33 by the lint. As a result, it is possible to prevent a decrease in electrolysis efficiency due to yarn waste, and to maintain a high electrolysis efficiency. In addition, since lint can enter the water treatment unit 60, a filter for lint need not be provided, and maintenance for lint can be eliminated.

  By the way, as shown in FIG. 2, some washing machines are provided with an air bubble generator 88 for generating air bubbles from the bottom 64 of the outer tub 2 in order to increase the washing power. When the bubble generator 88 and the water treatment unit 60 are combined, electrolysis can be performed more efficiently.

  The bubble generator 88 is connected to an air pump 89, an air hose 90 connected to an air discharge port of the air pump 89 to send air (air), and an end of the air hose 90 connected to blow air into the outer tub 2. (Not shown). When the bubble generator 88 is operated during washing, air is blown out from the nozzle, enters the inside of the washing and dewatering tub 5 through the hole, and generates bubbles below the pulsator 7. These bubbles are agitated by the rotating pulsator 7 and broken into many fine bubbles. Ultrasonic waves are generated when the fine bubbles come into contact with the laundry and burst. At this time, a shock wave in the ultrasonic region is generated, and thereby the separation of the dirt component adhering to the laundry is promoted, so that the cleaning ability can be improved as compared with the case where no air bubble is added.

  The bubble generating device 88 has a function as an air supply unit for supplying air from the lower part 70 of the electrolytic cell 32 into the electrolytic cell 32 in addition to the original function of enhancing the cleaning power. The air supply means generates a water flow by urging the water in the electrolytic cell 32 of the water treatment unit 60 to flow upward. The above-described air hose 90 is branched in the middle, and one end is connected to the nozzle, and the other end is connected to the electrolytic cell 32.

  As shown in FIG. 4, a single air supply port 91 to which air from an air hose 90 is supplied is formed in the lower portion 70 of the electrolytic cell 32. A plurality of air supply ports 91 may be provided. During the electrolytic treatment, the air pump 89 is operated. The air supplied from the air supply port 91 into the electrolytic cell 32 becomes bubbles E, floats in the electrolytic cell 32, and flows to the outer tank 2 through the upper water passage 34 (see an arrow indicated by a chain line in FIG. 4). . Along with this, the water accumulated in the electrolytic cell 32 is caused to flow by the flow of air (see the dashed arrow in FIG. 4). In particular, when the upper part 69 of the electrolytic cell 32 is inclined and the water passage 34 is located at a high position, the bubbles flow out of the electrolytic cell 32 quickly, so that the water can flow more easily. Bubbles do not collect between the electrodes 33. As a result, the electrolysis efficiency can be increased. Therefore, the voltage required to obtain a predetermined electrolytic capacity can be reduced, the size of electrical components such as the transformer 61 can be reduced, and low-cost components can be used, and the power consumption can be reduced. You can also.

  The air supply port 91 is arranged so as not to overlap with the electrode 33 in plan view, and is arranged so as not to face the electrode 33. Thereby, the air is supplied so as not to touch the electrode 33. Therefore, a decrease in electrolysis efficiency due to air can be suppressed. The air supply port 91 is preferably located at a corner of the lower surface portion 76 of the electrolytic cell 32 and separated from the end of the electrode 33 by a predetermined distance in the horizontal direction. The predetermined distance is a distance at which the air does not normally touch the electrode 33, for example, 10 mm.

  Further, the air supply port 91 and the upper water passage 34 are arranged so as to be diagonal in front view. This increases the distance that the air flows in the electrolytic cell 32, so that the water can be easily moved. The air supply port 91 and the lower water passage 35 are separately arranged on the left and right in a front view. Thereby, the hard-to-flow water far from the lower water passage 35 can easily flow by the air.

  As described above, the water in the electrolytic cell 32 can easily flow, and the electrolysis can be performed efficiently. In addition, the air for this purpose is guided into the outer tub 2 and can also contribute to the improvement of the cleaning power. The air pump 89 described above may supply air only to the electrolytic cell 32. Hereinafter, a case where the bubble generator 88 is omitted will be described. Returning to FIG.

  The upper surface of the housing 1 is constituted by an upper surface plate 18. At the center of the upper surface plate 18 is provided a loading port 18a for laundry, and the loading port 18a is openably and closably covered by an upper lid 19. An operation panel 48 is provided at a front portion of the upper surface plate 18.

  FIG. 6 is a plan view of the operation panel 48. The operation panel 48 includes an operation unit 21 and a display unit 28. The operation unit 21 includes a power key 49 for turning on the power to the main body, a start key 36 for starting a washing operation, a course key group 37 for selecting a washing course, a disinfection plus key 42, and a bath water key 43. And so on.

  The course group 37 includes a standard course key 38 for setting a standard course, a personal course key 39 for setting a personal course, a detergent zero course key 40 for setting a detergent zero course, a seizure course, The selection key 41 is used to select a desired course from a stubborn stain course, a blanket course, a weak washing course, and a dry course. The start key 36 also functions as a pause key for temporarily stopping the washing operation.

  The standard course is a washing course for performing a standard washing operation. The personal style course is a washing course in which a washing operation is performed with the contents set by the user. The iris course is a washing course in which the washing operation time is short. The cancer dirt course is a washing course in which washing is performed using a high-concentration detergent solution. The blanket course is a washing course for washing large items such as blankets and quilts. The weak washing course is a washing course for washing perishable clothes such as lingerie. The dry course is a washing course for washing dry mark clothing using a dry detergent. These washing courses are courses using a detergent. Tap water or bath water (detergent liquid) mixed with the detergent is stored in the outer tub 2 and a water flow is generated by rotating the pulsator 7 using the detergent liquid. Wash laundry.

  The detergent zero course is a course in which no detergent is used. Tap water or bath water stored in the outer tank 2 is electrolyzed by the electrolyzer 31 to generate electrolyzed water, and the pulsator 7 is rotated using the electrolyzed water. Generates a stream of water to wash the laundry.

  The disinfecting plus key 42 is a key operated when it is desired to disinfect laundry washed with a detergent in a standard course, a personal course, an irrigating course, a stubborn stain course, a blanket course, and a weak washing course.

  The bath water key 43 is a key operated when washing is desired using bath water. The user can operate the bath water key 43 to select which of the steps from the washing step (washing) to the last rinsing step (rinse 2) the bath water should be used. However, when the disinfection setting is performed by the disinfection plus key 42 and when the detergent zero course is set by the detergent zero course key 40, the use of bath water is restricted.

  As the display unit 28, disinfection setting is performed by a course display LED 45 for displaying a washing course set by each of the course keys 38, 39, 40 and a washing course selected by the selection key 41, and a disinfection plus key 42. A bath water display unit 47 indicating a process in which bath water use is set by the bath water key 43; an electrolysis indicating the progress of electrolysis / sterilization at the time of zero detergent or sterilization setting. A progress display unit 50, a detergent amount display unit 44 for displaying a detergent amount according to the load amount of the laundry, a segment display unit 52 for segment display of a remaining operation time, an abnormal display, and the like are provided. In the detergent amount display section 44, a plurality of LEDs are provided in the pattern of the detergent cup, and the number of LEDs corresponding to the detergent amount is turned on to display the detergent amount.

  FIG. 7 is an electrical configuration diagram of the fully automatic washing machine of the present embodiment. At the center of the control, a control unit 20 (corresponding to the control means and the count means of the present invention) including a CPU, a RAM, a ROM, a timer and the like is installed. This control unit 20 is constituted by a microcomputer. An operation signal is input to the control unit 20 from the operation unit 21, and a water level detection signal is input from a water level sensor 22 for detecting the water level of the water stored in the outer tub 2. An open / close detection switch 57 for detecting the open / closed state of the upper lid 19 is connected to the control unit 20. When the upper cover 19 is open, the control unit 20 can detect this state by turning on and off the internal circuit of the switch 57. Further, the controller 20 receives an unbalance detection signal from an unbalance detection switch 58 that detects when the outer tub 2 abnormally vibrates during dehydration due to imbalance of the laundry in the washing and dewatering tub 5. . The control unit 20 controls the rotation of the motor 8 via the inverter drive unit 23 and controls the operations of the torque motor 26, the water supply valve 13, and the bath water pump 59 via the load drive unit 25. The torque motor 26 controls the operation of the clutch 27 and the drain valve 15 as described above. The control unit 20 controls the operation of the display unit 28 and the buzzer 29 for notifying the end of the operation or the abnormality. The motor 8 is provided with a rotation sensor 24 that outputs a pulse signal according to the rotation, and the pulse signal is input to the control unit 20. The rotation sensor 24 is provided to detect the rotation speed of the motor 8, that is, the rotation speed of the washing and spin-drying tub 5.

  The pair of electrodes 33 is connected to the output side of the control unit 20 via the energizing circuit 30 including a transformer 61 and the like. When a signal for instructing energization is output from the control unit 20, the energizing circuit 30 operates to energize the pair of electrodes 33. A current detection circuit 51 (corresponding to current detection means of the present invention) is connected to the energization circuit 30. The current detection circuit 51 detects the magnitude of the current supplied to the electrode 33 and outputs the detected current value to the control unit 20.

  The sequence of each washing course described above is stored in the ROM 20a of the control unit 20. When a washing course is selected by operating the causkey group 37, a sequence corresponding to the washing course is read from the ROM 20a. Then, the control unit 20 controls various loads of the motor 8 and the like according to this sequence, and executes the washing operation of the selected washing course.

  An EEPROM 93 is connected to the control unit 20 as a non-volatile memory capable of storing data without energization. The EEPROM 93 may be built in the control unit 20.

  FIG. 16 is a circuit diagram schematically showing the energizing circuit 30. The energizing circuit 30 converts the AC voltage into a DC voltage by rectifying and smoothing the AC voltage stepped down by the transformer 95, and a transformer 95 for reducing the AC voltage 100V of the commercial power supply 94. A DC voltage circuit 96 for applying a DC voltage to the electrode 33; a switching transistor 97 operated by the control unit 20 to start and stop energization of the electrode 33; and a changeover switch 98 for switching the direction of energization to the pair of electrodes 33. (Corresponding to the reversing means of the present invention) and a third relay 99 provided between the changeover switch 98 and the switching transistor 97 and operated by the control unit 20. The changeover switch 98 includes a first relay 98a and a second relay 98b operated by the control unit 20, and the first relay 98a is connected to the first electrode 33a, and the second relay 98b is connected to the second electrode 33b. . When the contact of the first relay 98a falls to the terminal a and the contact of the second relay 98b falls to the terminal d, the first electrode 33a becomes the anode and the second electrode 33b becomes the cathode. When turned on, current flows from the first electrode 33a to the second electrode 33b. Conversely, when the contact of the first relay 98a falls to the terminal b and the contact of the second relay 98b falls to the terminal c, the second electrode 33b becomes the anode and the first electrode 33a becomes the cathode. A current flows from the two electrodes 33b to the first electrode 33a. A contact 49 a of the power switch 49 is interposed between the commercial power supply 94 and the transformer 95.

  By the way, the fully automatic washing machine of the present embodiment can perform the bacteria elimination at the same time as the rinsing of the laundry in the washing operation course in which the washing is performed using the detergent, such as the standard course, by the above configuration including the electrolytic device 31. The first feature is that it is made possible. Hereinafter, the first feature point will be described using a standard course as an example.

  The flowchart of FIG. 8 shows the washing operation operation of the standard course. When the standard course is set by the user and the start key 36 is pressed, the washing operation of the standard course is started.

  First, in a state where water is not supplied into the washing and dewatering tub 5, the amount of laundry put into the washing and dewatering tub 5, that is, the load amount is detected (step S1). Specifically, the pulsator 7 is rotated for a short time, and the load amount is determined according to the time during which the inertial rotation continues (total number of pulse signals from the rotation sensor 24). Of course, the load amount detection is not limited to this method, and any method may be used.

  In the fully automatic washing machine of the present embodiment, the rated load (load of laundry that can be washed at one time) in the standard course is 8 kg. The size (capacity) of the washing and dewatering tub 5 and the performance (output) of the motor 8 are set in advance by performing experiments and the like in accordance with the rated load amount.

  When the load amount is detected in step S1, the washing water level corresponding to the detected load amount is set based on the table of the relationship between the load amount and the water level (water amount) in the standard course shown in FIG. 9 (step S2). ). Since the rated load is 8 kg, the maximum water level is 59 l (liter) corresponding to 6 to 8 kg. Next, the detergent amount corresponding to the detected load amount is displayed on the detergent amount display section 44 (step S3). The user looks at the display on the detergent display section 44 and puts an appropriate amount of detergent into the washing / dewatering tub 5. When the setting of the water level according to the load amount and the display of the detergent amount are completed, the operation shifts to a full-scale washing operation.

  First, a washing process is performed. The control unit 20 opens the first valve 13a of the water supply valve 13 and supplies water to the set washing water level (step S4). As a result, the detergent liquid formed by dissolving the detergent in the tap water accumulates in the outer tank 2. When the water is supplied to the washing water level, the first valve 13a is closed.

  Next, the control unit 20 generates a water flow in the outer tub 2 by reversing the pulsator 7 in the left and right directions at a predetermined speed to wash the laundry (step S5). The dirt attached to the laundry is removed by the effect of the detergent and the effect of the water flow (mechanical force of the pulsator 7). Further, the effect of the detergent prevents the re-adhesion of the dropped dirt to the laundry. Then, when a predetermined washing time (for example, 10 minutes) elapses, the pulsator 7 stops and the washing ends. The control unit 20 opens the drain valve 15 to drain the washing liquid from the outer tub 2 (Step S6).

  When the washing process is completed, intermediate dehydration is performed (step S7). The control unit 20 performs dehydration of the laundry by rotating the washing / dehydrating tub 5 in one direction at a high speed.

  When the intermediate dehydration is completed, the control unit 20 determines whether or not the bacteria elimination has been set in the current washing operation of the standard course (step S8). When the user wants to remove bacteria from the laundry at the same time as rinsing in the standard course, the user presses the bacteria removal plus key 42 before starting the washing operation to set the bacteria removal.

  In step S8, when it is determined that the setting for removing bacteria has not been performed, normal rinsing is performed. In the standard course, the rinsing process is performed twice. First, dehydration rinsing is performed as a first rinsing step (step S9). That is, the control unit 20 opens the first valve 13a to supply water while slowly rotating the washing and dewatering tub 5 to, for example, about 30 rpm. Thereby, water is evenly contained in the laundry stuck to the inner wall of the washing and dewatering tub 5 by the intermediate dehydration. Next, the control unit 20 rotates the washing and dewatering tub 5 at a high speed of, for example, about 1000 rpm to dehydrate the laundry. Thus, the detergent contained in the laundry is blown off together with the water and removed. In the dehydration rinsing, the washing and dehydrating tub 5 may be rotated at a high speed at the same time as the supply of water to perform dehydration.

  Thus, when the first rinsing step is completed, the last rinsing step is executed. First, the control unit 20 opens the first valve 13a and supplies water to the set washing water level (step S10). During this water supply, when water is collected to a certain level, the control unit 20 controls the second valve 13b to turn on / off, and removes the soft finish agent previously stored in the finish agent storage unit 12b into the washing and dewatering tub 5. Put in.

  When water is supplied to the washing water level, the control unit 20 closes the first valve 13a. Then, in a state where the water supply is stopped, the pulsator 7 is rotated left and right to rotate and stir the laundry, and the laundry is rinsed (step S11). Thereby, the laundry is rinsed. When a predetermined rinsing time (for example, 2 minutes and 30 seconds) has elapsed since the pulsator 7 was rotated to start rinsing, the pulsator 7 is stopped and the rinsing is terminated. The control unit 20 opens the drain valve 15 and drains the rinsing liquid from the outer tank 2 (Step S12). Note that the last rinsing step may be a water injection rinsing that continues supplying water even when the washing water level is reached.

  Thus, when the last rinsing step is completed, final dehydration is performed (step S13). In this final dehydration, the dehydration time is longer than that in the intermediate dehydration, and the laundry is sufficiently dehydrated. When the final dehydration is completed, the washing operation of the standard course is terminated.

  On the other hand, if it is determined in step S8 that the setting for disinfection has been performed, a rinse for disinfecting the laundry is performed at the same time as the rinse. Similar to the normal rinsing described above, the rinsing step is performed twice. First, the first rinsing step is performed. In the first rinsing step, not the dehydration rinsing but the rinsing is performed. That is, after the water is supplied to the set washing water level, the laundry is stirred with the water supply stopped, and the laundry is rinsed (steps S14 and S15). Then, when a predetermined rinsing time (for example, 4 minutes) elapses after the pulsator 7 is operated, the rinsing is completed and drainage is performed (S16). The rinse uses a larger amount of water than the dehydration rinse, but the rinsing ability is correspondingly higher. Therefore, the detergent content in the laundry is more diluted than after the dehydration rinsing (the first rinsing step) in the normal rinsing. Note that the first rinsing step may be a water injection rinsing.

  When the first rinsing step is completed, the second intermediate dehydration is performed (step S17), and the process proceeds to the last rinsing step. In this last rinsing step, first, water supply into the washing / dewatering tub 5 is started (step S18). When the water level in the washing and dewatering tub 5 reaches the washing water level, the control unit 20 stops water supply. During this water supply, a predetermined water level lower than the washing water level (for example, a water level two ranks lower in the table of FIG. 9). Then, electrolytic rinsing for sterilizing laundry is started simultaneously with rinsing (step S19). Of course, at this predetermined water level, the pair of electrodes 33 of the electrolysis device 31 is submerged.

  This electrolytic rinsing is to remove bacteria from laundry by the effect of hypochlorous acid and hypochlorite ions generated by electrolysis, but as a result of experiments conducted by the applicant, hypochlorous acid and It has been found that the action of washing the laundry with electrolyzed water having a high concentration of hypochlorite ions at a stroke is more effective in removing the laundry than the action of gradually reducing the concentration of electrolyzed water having a low concentration. Therefore, in this electrolytic rinsing, first, a preparatory process for generating electrolyzed water having a high concentration of hypochlorous acid and hypochlorite ions is performed, and then, the electrolyzed water having the increased concentration is immediately discharged to an outer tank. 2 to carry out a disinfection and rinsing step which acts on the laundry. Hereinafter, the operation of the electrolytic rinsing will be described in detail with reference to the flowchart of FIG.

  When the electrolytic rinsing is started, first, a preparatory process is performed. That is, the control unit 20 operates the electrolysis device 31 to start electrolysis while the pulsator 7 is stopped (step U1).

  Tap water contains trace amounts of substances such as iron, calcium, magnesium, and chlorine, and active oxygen is generated in the electrolytic water generated in the electrolytic cell 32 by electrolysis, and Chloric acid (HClO) and hypochlorite ion (HClO-) are generated. More specifically, on the electrode 33 side serving as the anode (+ side), hypochlorous acid and hypochlorite ions are generated by a chemical reaction between water and chlorine contained therein. In addition, active oxygen is generated when hypochlorous acid is decomposed. At this time, since the pulsator 7 is stopped, the water in the outer tank 2 and the electrolytic tank 32 stops. Therefore, electrolyzed water having a high concentration of hypochlorous acid and hypochlorite ions is gradually generated in the electrolysis tank 32 and in the vicinity of the electrolysis tank 32 in the outer tank 2.

  When it is determined that one minute has elapsed since the start of the electrolysis (step U2), the control unit 20 determines a start time, which is an execution time of the start process. Further, the execution time of the sterilization rinsing step, that is, the stirring time that is the time for performing the stirring operation by the pulsator 7 is determined. Further, an electrolysis operation time, which is a time for operating the electrolysis device 31, is determined (step U3).

  The conductivity of tap water varies from region to region due to differences in the content of chlorine and the like. For this reason, in the fully automatic washing machine of the present embodiment, in order to protect the current supply circuit 30 against overcurrent and to stabilize the performance of the electrolysis, the current supply to the electrode 33 is controlled by the current supply control described later. If the current value (hereinafter referred to as the energizing current value) exceeds the target current value of 3.5 A (ampere), control is performed so that the average current value becomes about 3.5 A by intermittent energization according to the energizing current value. . On the other hand, when the current is 3.5 A or less, continuous energization is performed. In this case, if the conductivity of the tap water is low, the energized current value becomes small, so that the electrolytic capacity becomes small. Therefore, it becomes difficult to generate hypochlorous acid and hypochlorite ions, and it takes a long time to reach a predetermined concentration. Further, as the amount of water in the outer tank 2 increases, the electrolyzed water is further diluted when it spreads in the outer tank 2, so that it is necessary to increase the concentration of hypochlorous acid or hypochlorite ion. is there. Further, as the load on the laundry increases, it takes time for the electrolytic water to act on the entire laundry.

  Therefore, a table as shown in FIG. 11 is prepared. Using this table, the control unit 20 determines the pre-charge time based on the supplied current value detected by the current detection circuit 51 when one minute has elapsed and the set washing water level (water amount). That is, the smaller the energizing current value and the higher the washing water level, the longer the soaking time. Further, the electrolysis operation time is determined so as to correspond to this additional time. That is, the longer the turn-on time, the longer the electrolysis operation time. Further, the stirring time is determined based on the washing water level, that is, the load of the laundry. That is, because the load is large, the higher the washing water level, the longer the stirring time.

In this way, the preparatory process is performed until the predetermined preparatory time elapses,
Electrolyzed water having a high concentration of hypochlorous acid and hypochlorite ions is accumulated in the electrolysis tank 32 and at a location near the electrolysis tank 32 in the outer tank 2.

  When the soaking time elapses, the soaking process is terminated, and then a sterilization rinsing process is performed. That is, when it is determined that the preparatory time has elapsed (step U4), the control unit 20 rotates the pulsator 7 to the left or right. When an air pump 89 is provided, the air pump 89 is operated to supply air into the electrolytic cell 32. As a result, water starts to circulate between the outer tank 2 and the electrolytic tank 32, and hypochlorous acid or hypochlorous acid accumulated in the electrolytic tank 32 or at a location near the electrolytic tank 32 in the outer tank 2. Electrolyzed water having a high acid ion concentration spreads into the outer tank 2 at a stretch. Then, the electrolytic water having a high concentration acts on the laundry at a stretch, and the laundry is sterilized.

  The electrolysis operation time is set longer than the start-up time, so that the electrolysis is continued even if the sterilization rinsing process is started. Therefore, the electrolyzed water continues to be generated, and not only hypochlorous acid accumulated in the preparatory process but also newly generated hypochlorous acid acts on the laundry. However, the electrolysis operation time is set shorter than the electrolysis rinsing time, which is the sum of the start-up time and the agitation time, in order to suppress the consumption of the electrode 33 due to long-term energization. Therefore, the electrolysis operation time elapses during the sterilization rinsing process.

  When determining that the electrolysis operation time has elapsed (step U6), the control unit 20 stops the operation of the electrolysis device 31 (step U7). Thereafter, the disinfection rinsing process is continued only by the operation of the pulsator 7. During this time, the laundry is agitated in the electrolytic water that has already been generated, so that the laundry is further sterilized.

  When it is determined that two minutes before the stirring time ends, that is, two minutes before the electrolytic rinsing ends (step U8), the control unit 20 controls the second valve 13b on / off and controls the finishing agent storage unit 12b. Water is supplied and the soft finish is put into the washing and dewatering tub 5 (step U9). At this time, the first valve 13a is simultaneously opened to supply water, so that the soft finish is diluted. By adding the soft finish, the sanitized laundry can be finished more softly. When it is determined that the stirring time has elapsed (step U10), the control unit 20 stops the pulsator 7 and ends the electrolytic rinsing (step U11).

  In this way, when the electrolytic rinsing is completed, drainage is performed (step S20), and the last rinsing step is completed. Then, final dehydration is executed (step S13), and the washing operation is ended.

  The control unit 20 controls the energization of the current flowing through the pair of electrodes 33 during the operation of the electrolysis apparatus 31 in the electrolytic rinsing. The energization control process will be described below with reference to the flowchart of FIG. I do.

  When the operation of the electrolysis device 31 is started, first, the electrode 31 is energized (step K1). Next, an energizing current value is detected by the current detecting circuit 51. (Step K2). If the detected energization current value exceeds the protection current value 12A (YES in step K3), the energization is immediately stopped and the energization control is stopped (step K4). The protection current value is provided as a threshold value of a conduction current for protecting the switching transistor 97 included in the conduction circuit 30 from an overcurrent. By stopping the current supply immediately after the protection current value is exceeded, the switching transistor 97 is prevented from being damaged by an overcurrent.

  The operations of steps K2 and K3 are repeated until the current supply time of 4 seconds elapses. Then, when the energization time has elapsed, it is determined whether or not the energization current value detected immediately before exceeds the target current value of 3.5 A (step K6). If the current value is equal to or smaller than the target current value, it is determined whether or not the energizing current value is smaller than the lower limit current value 0.3A (step K7). If it has not reached (for example, three times) (NO in step K8), the process returns to step K1. That is, the current is not stopped, and the electrode 33 is continuously energized.

  On the other hand, if it is determined in step K6 that the current exceeds the target current value, the energization is stopped (step K10), and the energization stop time is determined according to the energization current value (step K11). That is, the average value of the energizing current in one cycle of the energizing time and the energizing stop time is set to the target current value. For example, the calculation is performed using the following formula.

Energization stop time = energization time * (energization current value−target current value) / target current value In the present embodiment, the target current value is set to 3.5 A and the energization time is set to 4 seconds. If it is 7A, the power supply stop time is 4 seconds.

  After determining the power supply stop time, it is next determined whether or not a predetermined time (two minutes) has elapsed since the polarity of the electrode 33 was inverted (step K12). The predetermined time is a time required for the rise in the energizing current value occurring at the beginning of energization to be stopped by reversing the polarity. If the predetermined time 2 minutes has elapsed, the upper limit current value is set to, for example, 9 A (step K13).

  Then, it is determined whether or not the energized current value exceeds the upper limit current value 9A (step K14). If the current value does not exceed the upper limit current value, or if the current value exceeds the upper limit current value, the number of times is three times or more. If it has not reached (NO in step K15), if the power supply stop time determined in step K11 has elapsed (YES in step K16), the process returns to step K1. As described above, when an energizing current that exceeds the target current value flows, the electrode 33 is intermittently energized, and control is performed so that the average value of the energizing current becomes the target current value.

  Until the stop time is determined to have elapsed in step K16, the detection of the energizing current value is also performed during the energizing stop period for the electrode 33 (step K18). Then, as a result of this detection, when it is determined that a current is flowing (step K19), it is determined that the switching transistor 97 for energizing / stopping the energizing circuit 30 is out of order, and the energization control is stopped. When such an abnormality occurs, the third relay 99 is turned off in the energizing circuit 30 to cut off the power supply to the electrode 33. Further, the result is stored in the EEPROM 93, and when the washing operation is completed, an abnormal display is output to the segment display section 52. Then, by prohibiting the subsequent operation of the electrolytic device 31, the electrolytic device 31 is prevented from being operated in the subsequent washing operation. When the repair is performed by a service person or the like and the abnormality is removed, the storage is erased from the EEPROM, and the operation of the electrolysis apparatus 31 becomes possible again. As described above, the energization current is detected during the energization stop of the electrode 33 in the energization control, and when the current is detected, it is determined that the switching transistor 97 is out of order and the energization control is stopped. In addition, since the power supply to the electrode 33 is stopped, it is possible to prevent undesired electrolysis from being performed.

  In this way, the operation of the electrolysis device 31 ends, and if this is determined in step K9 or step K17, the energization control ends.

  The energizing current value to be compared with the target current value, the upper limit current value, and the lower limit current value is the energizing current value detected just before the energizing time has elapsed (the energizing current value to be compared is detected after a predetermined time from the start of energizing. The reason for ()) is that an inrush current flows in the initial stage of energization and the current value becomes high, so that an accurate energization current value which is not affected by the inrush current is used.

  Further, the energization time is fixed and the energization stop time is changed according to the energization current value so that the average value of the energization current becomes the target current value for the following reason. When the energizing time is changed according to the energizing current value, the energizing current value must be detected immediately after energization starts to determine the energizing time. In this case, an accurate current value cannot be detected because of the influence of the rush current described above. Therefore, the intermittent energization control according to the energization current value cannot be accurately performed. In this regard, if the energization time is fixed and the energization stop time is changed, the current can be detected in the latter half of the energization time during which no inrush current is received as described above, so that the energization current value can be accurately detected. This makes it possible to perform highly accurate intermittent energization control.

  Now, in electrolytic rinsing, the detergent concentration in the rinsing water may increase. For example, a case where a large amount of detergent is used in the washing process, and the final rinse is subjected to electrolytic rinsing in a state where the detergent cannot be sufficiently rinsed and remains in the laundry much. When electrolysis is performed in such a state where the detergent concentration is high, there is a possibility that desired electrolysis may not be performed unlike ordinary water (tap water) due to the influence of components in the detergent. In addition, in many cases, the conductivity of the detergent is significantly improved by the components of the detergent. In this case, an overcurrent flows, and if the operation is continued as it is, the energizing circuit 30 of the electrolytic device 31 may be damaged. Therefore, in the fully automatic washing machine of the present embodiment, an upper limit current value is set for judging overcurrent and judging that the detergent concentration is high.

  For example, the conductivity of the rinsing water is significantly improved by increasing the detergent concentration in the rinsing water, and when the energizing current value exceeds 8A, it is determined that the upper limit current value is exceeded in step K12 in the energizing control described above, In addition, it is determined in step K13 that the number has reached the predetermined number. In this case, it is determined whether or not the polarity of the electrode 33 has already been reversed (the current flowing direction has been reversed) (step K21). If the polarity has not been reversed, the polarity is reversed (step K22), and the step K1 has been performed. And the energization control is started again. On the other hand, if the polarity has already been inverted, that is, if the situation in which the current exceeds the upper limit current value is not changed even if the polarity is inverted, the energization control is stopped.

  In the fully automatic washing machine of the present embodiment, the polarity of the electrode 33 is inverted when a current that exceeds the upper limit current value is detected as described above, and the polarity is inverted every time a predetermined inversion time elapses as described later. . As a result of experiments conducted by the applicant, when the electrode 33 is energized after reversing the polarity, the time varies depending on various conditions, but for several seconds to several minutes (about two minutes) after the energization is started, It was found that the energizing current value was about 1 A (ampere) larger than that in the steady state. For this reason, even when the energizing current exceeding the upper limit current value does not flow in the steady state, the energizing control of the electrode 33 is undesirably stopped by exceeding the upper limit current value at the initial energizing after reversing the polarity. There is a possibility that it will end up.

  On the other hand, in the present embodiment, if it is determined in step K12 of the energization control that the energization time has not elapsed for 2 minutes since the polarity of the electrode 33 has been inverted, the upper limit current value is changed to the polarity inversion. The current value is set to a value larger than the steady-state current value 9A, for example, 10A, in accordance with the increase in the energizing current value caused by the cause (step K23). Therefore, the control of energization of the electrode 33 is not undesirably stopped due to the reversal of the polarity.

  The thin film material coated on the electrode 33 is consumed every time the electrolytic device 31 is operated, and eventually disappears completely over time of use. If the electrolysis is performed in a state where the thin film material has disappeared, the base material may be melted out, which may adhere to the clothes being washed and soil the laundry. If the thin film material is consumed and becomes only the base material, no current flows extremely to the electrode 33 even if a voltage is applied in the same manner as in the normal state. Therefore, in the fully automatic washing machine of the present embodiment, a lower limit current value for determining that the thin film material coated on the electrode 33 has run out is further set.

  For example, when the thin film material of the electrode 33 completely disappears, it becomes very difficult for the current to flow through the electrode 33, and when the energized current value is smaller than 0.3 A, it is determined in step K7 that the current value is smaller than the lower limit current value. Then, it is determined in step K8 that the predetermined number of times has been reached. In this case, the energization of the electrode 33 is stopped (step K20), and the energization control is stopped if it is determined in step K21 that the polarity has already been reversed, as in the case where the upper limit current value has been exceeded. .

  In addition, even if the control of energizing the electrode 33 is stopped during the electrolytic rinsing and the operation of the electrolytic device 31 is stopped, the rinsing itself continues. Thereby, at least rinsing performance is ensured. However, since the priming process does not contribute much to the rinsing performance, when the operation of the electrolysis apparatus 31 is stopped, the priming process is stopped and the process moves to the sterilization rinsing process (in this case, the rinsing is simply performed). You may do it. Further, when the energization control is stopped, water may be replaced and electrolytic rinsing may be performed again.

  Next, the second feature of the fully automatic washing machine of the present embodiment is that a detergent zero course is provided as a washing course. Hereinafter, the washing operation operation of the detergent zero course will be described with reference to the flowcharts of FIGS.

  The detergent zero course is a course suitable for washing relatively lightly stained clothes, mainly sebum stains and sweat stains, and does not use a detergent by washing with electrolytic water by electrolysis. Because it does not use detergents, it is ideal for washing baby clothes with sensitive skin. The detergent zero course is, in other words, an electrolytic washing course. In the present embodiment, the detergent is not used, and is referred to as the detergent zero course.

  When the user sets the detergent zero course and presses the start key 36, the washing operation of the detergent zero course is started under the control of the control unit 20.

  First, load amount detection / water level setting processing is performed (step F1). The operation of the load amount detection / water level setting process is as shown in FIG. That is, first, in a state where water is not supplied into the washing and dewatering tub 5, the load amount of the laundry put into the washing and dewatering tub 5 is detected (step F101). In the fully automatic washing machine of the present embodiment, the rated load in the detergent zero course is 4.5 kg. The performance (output) and the like of the electrolytic device 31 are set in advance by performing experiments and the like in accordance with the rated load amount. The electrolyzer 31 has such a performance as to be able to sufficiently disinfect the laundry of 8 kg, which is the rated load of the standard course, if only the sterilization of the laundry is performed as in the above-described standard course. have.

  When the load amount is detected in step F101, it is determined whether the detected load amount exceeds the rated load amount of 4.5 kg (step F102). If the load does not exceed the rated load, the washing water level corresponding to the detected load is set based on the table of the relationship between the load and the water level (water amount) in the detergent zero course shown in FIG. 9 (step F103). ). Since the rated load is 4.5 kg, the maximum water level is 43 l (liter) corresponding to a water level of 3 to 4.5 kg. In this detergent zero course, the detergent amount is not displayed because no detergent is used.

  On the other hand, if it is determined in step F102 that the load exceeds the rated load, an overload sign for notifying that the laundry is overloaded is output (step F104). That is, the buzzer 29 is operated intermittently to generate a buzzer sound "Pee, Pee, Pee, Pee" and to display a user error such as "U8" (an error caused by a user operation error) in a segment display. Put out to the part 52. Although the buzzer sound stops, the user error display continues until it is determined that the start key 36 has been pressed. In addition, the buzzer sound of the excessively inserted sign is made different from the abnormal sound that informs other trouble abnormality or user error by changing the on / off time of the buzzer.

  When the user notices the overfilled sign and presses the start key 36, this is determined in step F105, the output of the overfilled sign, that is, the display of the user error is stopped, and the washing operation is interrupted (step F106). Then, when the excessively loaded laundry is removed by the user and the start key 36 is pressed again, this is determined in step F107, and the washing operation is started again.

  When the washing water level is set and the load amount detection / water level setting process ends, a pre-washing step is executed next. First, the first valve 13a is opened to start supplying water to the washing and dewatering tub 5 (step F2). When the water level in the washing and dewatering tub 5 reaches the washing water level, the first valve 13a is closed to stop the water supply. However, in this water supply, a predetermined water level lower than the washing water level (for example, two ranks lower than the table in FIG. 9). When the water level reaches (water level), electrolysis pre-washing is started (step F3). Of course, at this predetermined water level, the electrode 33 of the electrolytic device 31 is submerged.

  First, a water flow is generated in the outer tub 2 by reversing the pulsator 7 from side to side. At the same time, the electrolyzer 31 is operated. When an air pump 89 is provided, the air pump 89 is operated to supply air into the electrolytic cell 32.

  As described above, by performing electrolysis, active oxygen is generated in the vicinity of the electrode 33 as well as hypochlorous acid and hypochlorite ions in the electrolytic water. The electrolyzed water has a weak alkaline property. Water flows between the inside of the electrolytic tank 32 and the inside of the outer tank 2 by the stirring operation of the pulsator 7 and the supply of air by the air pump 89, and the inside of the outer tank 2 is gradually filled with the electrolytic water. The dirt adhering to the laundry is removed by the effect of the alkaline water and the effect of the water flow (mechanical power of the pulsator 7). The dirt removed from the laundry is decomposed by active oxygen in the electrolytic bath 32, and the dirt is prevented from re-adhering to the laundry. In addition, hypochlorite and hypochlorite ion mostly act on various bacteria in the soil, so that the bacteria-eliminating effect of the laundry cannot be expected so much.

  Then, when a predetermined pre-washing time (for example, 3 minutes) has elapsed since the start of the electrolytic pre-washing, the operation of the electrolyzer 31 is stopped, the pulsator 7 is stopped, and drainage is performed from the outer tank 2. The washing process ends (step F4). In this way, the pre-washing step roughly removes soiling of the laundry.

  In this electrolytic pre-washing step, as in the electrolytic rinsing step, energization control of the electrode 33 is performed. For this reason, in the detergent zero course, if the current is very large due to the detergent being mistakenly supplied by the user and the detergent concentration of the pre-wash water being increased, the electrolysis During the washing, the operation of the electrolysis device 31 is stopped. However, the operation of the pulsator 7 is continued, and the prewashing itself is continued. At this time, if the detergent is the cause, the effect of the detergent compensates for the removal of dirt due to the ineffectiveness of the electrolytic water. In addition, even when the detergent is not the cause, the effect of pre-washing can be achieved, although the stain removal is slightly deteriorated.

  Considering the purpose of pre-washing, which roughly removes dirt from laundry before performing full-scale washing, in this pre-washing process, the electrolytic device 31 is used in consideration of the life and power consumption of the electrolytic device 31. It is good also as composition which does not operate and does not perform electrolysis.

  When the pre-washing step is completed, intermediate dehydration is executed (F5). The operation of this intermediate dehydration is as shown in FIG. That is, the washing / dewatering tub 5 is started and rotated at a high speed in one direction (step F501). Thereby, the laundry in the washing and dewatering tub 5 is dehydrated. Then, when a predetermined dehydration time has elapsed, the washing and dehydration tub 5 is stopped, and the intermediate dehydration is completed (steps F502 and F503).

  During the dehydration operation, the unbalance detection switch 58 detects an imbalance of the laundry in the washing and dewatering tub 5, that is, an abnormal swing of the outer tub 2 caused by the imbalance. Then, when the unbalance detection switch 58 detects abnormal shaking of the outer tub 2, it is determined in step F504 that the laundry is in an unbalanced state, and the washing and dewatering tub 5 is stopped to stop the dehydration (step F505). ). Then, an unbalance correction operation (relaxation operation) is performed to eliminate the imbalance of the laundry in the washing and dewatering tub 5 (step F506).

  In the unbalance correction operation, first, the first valve 13a is opened to start water supply (step F561). Next, it is determined whether or not the set washing water level is the highest water level in the detergent zero course (step F562). When the water level is not the maximum water level, when water is supplied to the set washing water level, the first valve 13a is closed to stop water supply (steps F563 and F565).

  On the other hand, if it is determined that the washing water level set in step F562 is the highest water level, a loosening water level higher than the highest water level is set. Then, water is supplied to the loosening water level and the first valve 13a is closed (steps F564 and F565). The loosening water level is, for example, a water level of 51 l (liter) which is two ranks higher than the highest water level of the detergent zero course in the standard course. When the set washing water level is the highest water level, the loosening water level is set higher than the highest water level for the following reason. That is, when a little more laundry is loaded than the rated load, the load may be erroneously detected as being within the rated load due to various factors due to various factors. In such a case, the washing water level is a water level corresponding to the rated load, that is, the highest water level in the detergent zero course, but in this state, the amount of water becomes insufficient with respect to the load, and the laundry becomes It is easy to get into a dumpling state and the laundry tends to be unbalanced in the washing tub. Therefore, when the imbalance is detected under the situation where the maximum water level is set, it is expected that the load is slightly larger than the rated load amount as described above. In this case, if the maximum water level is used, there is a possibility that the amount of water will be insufficient with respect to the actual load, and the water cannot be sufficiently loosened.

  Next, when the water supply is completed, the pulsator 7 is activated and the laundry is agitated by reversing the rotation (step F566). As a result, the laundry is loosened, and the imbalance of the laundry in the washing and dewatering tub 5 is eliminated. After the predetermined loosening time has elapsed, the pulsator 7 is stopped, drained, and then the imbalance correction operation ends (steps F567 to F569). When the imbalance is eliminated, the dehydration operation is restarted.

  As described above, when the washing water level is set to the maximum water level, if an imbalance is detected, the water is supplied to the loosening water level higher than the maximum water level, and the laundry is stirred at this water level. Can be surely released even if the load is slightly larger than the rated load.

  When the intermediate dehydration is completed, an electrolytic washing step is performed (Steps F6 to F8). The operation in the electrolytic washing step is the same as the operation in the electrolytic pre-washing step described above, but the electrolytic washing time for operating the electrolytic device 31 and the pulsator 7 is set longer than the pre-washing time. For example, the electrolytic washing time is set to 10 minutes while the pre-wash time is 3 minutes. Thus, the electrolytic washing process sufficiently removes stains on the laundry.

  Also in this electrolytic washing process, the control of energization to the electrode 33 is performed. For this reason, as described above, the detergent is erroneously supplied by the user, the electrolytic washing is performed while a large amount of the detergent remains in the laundry, and the electrolytic current is increased due to an increase in the electrolytic concentration of the washing water. Becomes extremely large, the operation of the electrolytic device 31 is stopped during the electrolytic washing. At this time, the operation of the pulsator 7 is continued, and the washing itself is continued. In the electrolytic washing step, unlike the pre-washing step, it is necessary to sufficiently clean the laundry. For this reason, if the cause is due to the introduction of the detergent, the cleaning performance may be secured by the effect of the detergent. However, when the amount of the detergent is not sufficient or when the introduction of the detergent is not the cause (for example, when a Is caused by the introduction of a substance that improves the electrical conductivity of the electrolytic solution 31), there is a possibility that sufficient cleaning performance cannot be secured if the electrolytic device 31 is stopped. Therefore, when the energizing current increases and the operation of the electrolytic device 31 is stopped during the electrolytic washing process, an additional electrolytic washing process described later is executed.

  When the electrolytic washing step is completed, the second intermediate dehydration is executed (step F9). The operation of the second intermediate dehydration is the same as the operation of the first intermediate dehydration.

  When the second intermediate dehydration is completed, it is determined whether or not the operation of the electrolysis device 31 has been stopped in the middle of the electrolytic washing process due to the supplied current value exceeding the upper limit current value (step F10). If not, the process proceeds to the electrolytic rinsing process. On the other hand, if it is determined that the operation of the electrolytic device 31 has been stopped during the electrolytic washing process, the additional electrolytic washing process is performed (steps F11 to F13). The operation of this additional electrolytic washing step is the same as the pre-washing step and the electrolytic washing step, except that the additional washing time for operating the electrolytic device 31 and the pulsator 7 is set to be longer than the pre-washing time and shorter than the electrolytic washing time. I have. In the present embodiment, for example, the additional washing time is set to 5 minutes. This is because some washing is performed during the electrolytic washing process, so that the time required for the electrolytic washing time is not necessary, but it is necessary to perform washing more sufficiently than the pre-washing process.

  When the additional electrolytic washing step is performed, the third intermediate dehydration is further performed (step F14), and then the electrolytic rinsing step is performed (steps F15 to F17).

  The operation of the electrolytic rinsing step is the same as the operation in the case where the disinfection is set in the standard course and the electrolytic rinsing is performed in the final rinsing step. The start-up time, the stirring time, and the electrolysis operation time are as shown in FIG. 11, but since the rated load (the maximum water level) is smaller than that of the standard course, the start-up time and the electrolysis operation time are based only on the current value. The stirring time is constant. Further, the stirring time is longer than the stirring time corresponding to the same water level and the current value in the standard course.

  Thus, when the electrolytic rinsing step is completed, final dehydration with a longer dehydration time than the intermediate dehydration is performed (Step F18). The dehydration operation of this final dehydration is the same as the operation of the intermediate dehydration except that the dehydration time is long. Then, when the final dehydration is completed, the cleaning operation of the detergent zero course is completed.

  The execution time of the electrolytic pre-wash (the operation time of the electrolytic device 31) and the execution time of the electrolytic wash may be changed according to the magnitude of the supplied current. In this case, the smaller the energizing current value, the longer the execution time. Further, the execution time of the electrolytic prewash (the operation time of the electrolysis device 31) and the execution time of the electrolytic washing may be changed according to the load of the laundry and the amount of water (water level). In this case, the longer the load amount or the amount of water, the longer the execution time. By doing so, the cleaning performance can be more reliably ensured.

  By the way, if the current is continuously supplied to the electrode 33 while maintaining the same polarity, the scale may adhere to the electrode surface, making it difficult for the current to flow between the electrodes, and reducing the electrolysis ability. In order to prevent this, in the fully automatic washing machine of the present embodiment, under the control of the control unit 20, the polarity inversion control of periodically inverting the polarity of the electrode 33 is performed. This will be described according to the flowchart of FIG.

  When the electrolysis apparatus 31 is operated, that is, when the energization control to the electrode 33 is started, first, the energization time to the electrode 33 at the end of the previous energization control is read from the EEPROM 93 (step G1). Then, counting of the energization time is started from the continuation of the read energization time (step G2). Next, it is determined whether or not the counted energization time has reached a predetermined inversion time, for example, 60 minutes (step G3). The shorter the reversal time, the harder the scale adheres. However, frequent inversion of the electrode 33 causes peeling of the thin film material serving as an oxidation catalyst coated on the electrode surface. Therefore, the reversal time is a time that can prevent the adhesion of the scale and the peeling of the thin film material, and is determined in advance by experiments or the like.

  If it is determined in step G3 that the reversal time has come, the energization control of the electrode 33 is stopped, and the energization of the electrode 33 is stopped (step G4). Then, the changeover switch 98 is operated to invert the polarity of the electrode 33 (step G5). For example, when the first electrode 33a is an anode and the second electrode 33b is a cathode, the contact of the first relay 98a is switched from the terminal a to the terminal b and the contact of the second relay 98b is switched from the terminal d. Switch to terminal c side. Thereby, the first electrode 33a becomes a cathode and the second electrode 33b becomes an anode. In this way, when the polarity inversion ends, the energization time is reset, the counting is started again, and the energization control is restarted (steps G6 to G8). Then, the process returns to Step G3.

  If it is determined in step G3 that the inversion time has not elapsed, it is determined whether the energization control of the electrode 33 has been completed (step G9). If the energization control has not ended, the process returns to step G3. On the other hand, if the energization control has been completed, the counting of the energization time is stopped (step G10). Then, the energizing time counted so far is stored in the EEPROM 93 (step G11), and the polarity inversion control ends.

  As described above, in the fully automatic washing machine of the present embodiment, the polarity of the electrode 33 is reversed every time the power supply time to the electrode 33 reaches the predetermined reversal time. Is prevented, and stable cleaning performance and sterilization performance can be secured.

  Further, an EEPROM 93 which is a non-volatile memory is provided. When the energization control for the electrode 33 is completed, the energization time counted up to this point is stored in the EEPROM 93, and when the next energization control is started, the energization time is read out from the EEPROM 93. Since the power supply time is counted from the continuation of the power supply time, the power supply time can be stored even if the power switch 49 is turned off or the power supply to the device is cut off due to the disconnection of the power outlet, so that the power supply time can be always stored. It is possible to invert the polarity in the current application time.

  Further, by controlling the current supply to the electrode 33 as described above, the value of the current flowing to the electrode 33 is made substantially constant (approximately constant on average). Becomes substantially constant, and the adhesion of the skewer can be stably prevented without finely adjusting the inversion time.

  As mentioned above, although one Embodiment of the washing machine and the washing machine of this invention was described, this invention is not limited to the said embodiment, for example, as shown below.

  The washing machine of the present invention is not limited to a fully automatic washing machine. A so-called drum type washing machine in which a washing tub is constituted by an outer tub and a horizontal axis type drum provided in the outer tub may be used. Further, a so-called two-tub washing machine in which one washing tub is provided and a dewatering tub is separately provided may be used.

  The washing means of the present invention is not limited to the pulsator 7. For example, in a fully automatic washing machine, in a case where laundry is washed using a water flow generated by rotation of the washing and dewatering tub, the washing and dewatering tub is a washing means. In a drum type washing machine, a drum and a baffle for stirring the laundry provided on the drum serve as a washing means. In short, any means for washing laundry by mechanical force may be used.

  The electrolytic means of the present invention is not provided separately from the washing tub as in the present embodiment, but may be provided in the washing tub. Further, it may be provided at a place where water in the washing tub is circulated by the washing operation. Furthermore, in the present embodiment, the water stored in the washing tub is electrolyzed. However, the electrolytic means is to electrolyze water before water is supplied into the washing tub, and the electrolyzed water generated by this is used for washing the washing tub. It may be supplied inside.

  The present invention is not limited to the one in which only tap water is electrolyzed. In order to promote the electrolysis of tap water, salt water or sodium bicarbonate may be added to the tap water to form a solution to be electrolyzed, and this may be electrolyzed.

  The washing machines according to the sixth to ninth aspects of the present invention are not limited to the fully automatic washing machine of the present embodiment, and are not limited to other washing machines. It may be a machine or an instrument washing machine for washing medical and laboratory instruments. In short, any cleaning machine for cleaning an object to be cleaned may be used.

  In addition, changes and modifications can be appropriately made within the scope of the present invention.

1 is a side sectional view of a fully automatic washing machine according to an embodiment of the present invention. FIG. 2 is a partial front sectional view of the fully automatic washing machine shown in FIG. 1. Partial sectional side view of a water treatment unit. The schematic diagram which shows the schematic structure seen from the front of the water treatment unit. FIG. 3 is a perspective plan view of a rear part of an upper plate showing a configuration of a water supply mechanism. FIG. 2 is a plan view of an operation panel showing a configuration of an operation unit and a display unit. FIG. 2 is an electrical configuration diagram of the fully automatic washing machine according to the embodiment. 9 is a flowchart showing a washing operation operation of a standard course in the fully automatic washing machine of the embodiment. 9 is a table showing a relationship between a load amount and a water level in a standard course and a detergent zero course. 5 is a flowchart showing an operation of electrolytic rinsing in the fully automatic washing machine of the embodiment. A table for determining a soaking time, a stirring time, and an electrolysis operation time in electrolysis rinsing. 4 is a flowchart showing control of electrode energization in the fully automatic washing machine of the embodiment. 5 is a flowchart showing a washing operation operation of the detergent zero course in the fully automatic washing machine of the embodiment. The flowchart which shows the flow of load amount detection and a water level setting process in a detergent zero course. The flowchart which shows the operation | movement of intermediate dehydration in a detergent zero course. FIG. 2 is a circuit diagram schematically showing an electrode energizing circuit in the fully automatic washing machine of the embodiment. 5 is a flowchart illustrating polarity inversion control of electrodes in the fully automatic washing machine according to the embodiment.

Explanation of reference numerals

2 Outer tub (washing tub, washing tub)
5 Washing and dewatering tub (washing tub, washing tub)
7 Pulsator (washing means, washing means)
20 control unit (control means, counting means)
31 Electrolysis equipment (electrolysis means)
32 electrolytic cell 33 a pair of electrodes 51 current detection circuit (current detection means)
93 EEPROM (non-volatile memory)
98 Changeover switch (reversing means)
98a 1st relay 98b 2nd relay

Claims (4)

A washing tub containing laundry, washing means for washing the laundry in the washing tub by mechanical force, electrolytic means including at least one pair of electrodes, and electrolyzing water used for washing; and the washing means And a control means for controlling the operation of the electrolytic means and for washing the laundry by the operation of the washing means using the electrolytic water generated by the operation of the electrolytic means or for performing an electrolytic washing process by rinsing. hand,
A current detecting means for detecting a magnitude of a current flowing through the electrode for electrolysis,
The control unit performs intermittent energization to the electrode, fixes the energization time in the intermittent energization, and increases the energization stop time in the intermittent energization as the current value detected by the current detection unit during energization increases. A washing machine characterized by the following. A washing tub containing laundry, washing means for washing the laundry in the washing tub by mechanical force, electrolytic means including at least one pair of electrodes, and electrolyzing water used for washing; and the washing means And a control means for controlling the operation of the electrolytic means and for washing the laundry by the operation of the washing means using the electrolytic water generated by the operation of the electrolytic means or for performing an electrolytic washing process by rinsing. hand,
A current detecting means for detecting a magnitude of a current flowing through the electrode for electrolysis,
The control means intermittently energizes the electrode so that an average value of energization current in one cycle of energization time and energization stop time becomes a target current value in accordance with a current value detected by the current detection means. When the current is detected by the current detecting unit within the power-supply stop time, an abnormality process of stopping power supply to the electrode is performed. A washing tank containing an object to be washed, washing means for washing the object to be washed in the washing tank, including at least a pair of electrodes, an electrolytic means for electrolyzing water used for washing, the washing means and Control means for controlling the operation of the electrolyzing means, and for washing the object to be cleaned by the operation of the cleaning means using the electrolytic water generated by the operation of the electrolyzing means, or for performing a rinsing electrolytic cleaning step. hand,
A current detecting means for detecting a magnitude of a current flowing through the electrode for electrolysis,
The control unit performs intermittent energization to the electrode, fixes the energization time in the intermittent energization, and increases the energization stop time in the intermittent energization as the current value detected by the current detection unit during energization increases. Washing machine characterized by the following. A washing tank containing an object to be washed, washing means for washing the object to be washed in the washing tank, including at least a pair of electrodes, an electrolytic means for electrolyzing water used for washing, the washing means and Control means for controlling the operation of the electrolyzing means, and for washing the object to be cleaned by the operation of the cleaning means using the electrolytic water generated by the operation of the electrolyzing means, or for performing a rinsing electrolytic cleaning step. hand,
A current detecting means for detecting a magnitude of a current flowing through the electrode for electrolysis,
The control means intermittently energizes the electrode so that an average value of energization current in one cycle of energization time and energization stop time becomes a target current value in accordance with a current value detected by the current detection means. When the current is detected by the current detecting unit within the power-supply stop time, an abnormality process of stopping power supply to the electrode is performed.

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