JP7093072B2 - washing machine - Google Patents

Description

The present invention relates to a washing machine in which the washing capacity is enhanced by internally generating ozone water.

Conventionally, ozone water has been used for washing. For example, Patent Document 1 discloses a washing machine for washing an object to be washed. This washing machine has a tank that can store water for washing the object to be washed, an electrolytic water generator that generates electrolytic water by electrolyzing the water, and drains the water stored in the tank. It is equipped with a drainage mechanism for. Then, the tank cleaning operation executing means puts the electrolyzed water of a predetermined concentration generated by the electrolyzed water generator into a state of being stored in the tank, and after a sufficient time has elapsed for sterilizing the inside of the tank in that state, the drainage mechanism Is configured to perform a tank cleaning operation to drain the electrolyzed water in the tank.

Further, Patent Document 2 discloses an electrolyzed water generation / discharge device for discharging electrolyzed water generated by electrolysis toward an animal or human body part for cleaning or disinfection. This electrolytic water generation / discharge device is connected to an electrolytic unit that generates electrolytic water by electrolyzing the supplied water or an aqueous solution using an electrolytic electrode that uses at least a diamond electrode as an anode, and an electrolytic unit. It is equipped with a nozzle, a pump that supplies water or an aqueous solution to the electrolytic unit at a predetermined flow rate, and discharges the electrolytic water generated by the electrolytic unit from the nozzle, and a control unit that controls the operation of the electrolytic unit and the pump. ing. The control unit is configured to control the start and stop of the operation of the electrolytic unit and the pump at predetermined time intervals, and intermittently discharge the electrolyzed water from the nozzle.

Japanese Unexamined Patent Publication No. 2004-73248 Japanese Unexamined Patent Publication No. 2012-161762

However, Patent Document 1 has a problem that the main component of the acidic electrolyzed water produced in the intermediate process is hypochlorous acid and remains.

On the other hand, Patent Document 2 has a problem that the amount of ozone water generated is small because it is a portable ozone water generator and is used for cleaning traumatic parts of animals and humans.

Therefore, it is an effective means to generate ozone by arranging an ozone electrolyzer in the water supply channel in order to enable continuous sterilization and deodorization without generating residual substances due to ozone generation. Can be considered as. The ozone electrolytic unit referred to here includes an ozone electrode and an electrolytic film.

However, it has been clarified by the study of the present inventor that the desired effect cannot be expected even if the ozone electrolyzer is arranged carelessly. For example, when the ozone electrolytic unit is driven with a constant current, the resistance value increases when the electrolytic film of the ozone electrolytic unit is dry, and as a result, the voltage increases. Even if the voltage is measured after the ozone electrolyzer is immersed in water once, and after a certain period of time has passed after the ozone electrolyzer is pulled up, the ozone electrolyzer is immersed in water and the electrolysis voltage is measured. The tendency is that the resistance value rises, and as a result, the voltage rises. An increase in the electrolytic voltage leads to deterioration of the membrane, which in turn accelerates damage or breakage of the ozone electrolytic part.

It has been found that such a voltage increase is caused by impurities adhering between the electrodes due to electrolysis during drying. Therefore, it is better not to repeat the wet and dry states of the electrolytic film in terms of deterioration of the electrolytic film. Therefore, it is desirable to have a structure in which the ozone electrolyzer is always immersed in water once it is immersed in water.

From this point of view, the present invention aims to realize a washing machine that does not generate residual substances and can maintain the sterilizing and deodorizing effect while protecting the ozone electrolytic part from damage. I am aiming.

The present invention has taken the following measures in order to solve the above problems.

That is, the washing machine of the present invention includes a water supply channel for supplying water to the washing tub and an ozone generation device for generating ozone in the water supply channel, and the ozone generation device is the water supply channel. It contains an ozone electrolytic unit that is arranged substantially horizontally along the water flow direction in a horizontally long ozone generation region provided in a part of the road, and is above and upstream of the ozone generation region. Is arranged with a valve that opens and closes the water supply channel, and while the opening and closing operation of the valve is repeated, the ozone electrolytic unit of the ozone generator is configured to always maintain the state of being immersed in water in the ozone generation region. It is characterized by being.

Further, the washing machine of the present invention includes a washing machine main body, an outer tub arranged in the washing machine main body, and a rotatable drum in the outer tub, and ozone generation in the water supply channel is provided. The region is arranged near the upper wall of the washing machine main body at a position adjacent to the rear surface of the outer tub, and at least one of the upstream side or the downstream side of the ozone generation region bends with respect to the ozone generation region. The ozone electrolyzed portion can be inserted into and removed from the ozone generating region through the bent portion.

Further, in the washing machine of the present invention, the ozone generation pipes constituting the ozone generation region are a pair of pipes arranged in series with a gap and an elastic cylinder for liquidtight connection between both pipes. The elastic cylinder is supported by the washing machine main body via a support member, and an ozone electrolytic part is provided in each piping part, and a bent part of an upstream water supply channel and a bent part of a downstream water supply channel are provided. It is characterized in that it can be inserted and removed via each.

Further, the washing machine of the present invention includes a washing machine main body, an outer tub arranged in the washing machine main body, and a drum that can rotate in the outer tub, and controls opening and closing of the valve and ozone electrolysis. It is provided with a control unit that controls energization ON / OFF control to the unit, and the control unit switches the valve from the closed state to the open state at the start of sterilization in the washing process, and switches the valve. It is characterized in that the control of switching the energization to the ozone electrolytic unit from OFF to ON is performed after a lapse of a predetermined time from the above or after directly or indirectly detecting an increase in the water level in the drum.

Further, the washing machine of the present invention includes a control unit that controls opening / closing control of the valve and energization ON / OFF control of the ozone electrolysis unit, and the control unit stops sterilization in the washing process. At times, the energization of the ozone electrolytic unit is switched from ON to OFF, and the valve is controlled to be switched from the open state to the closed state after a predetermined time has elapsed from the switching.

Further, the present invention includes a washing machine main body, an outer tub arranged in the washing machine main body, and a drum that can rotate in the outer tub, and controls rotation ON / OFF of the drum at a predetermined cycle. It is provided with a control unit that controls energization ON / OFF of the ozone electrolysis unit, and while replenishing ozone water in a state where the disinfection step in the washing process turns on energization of the ozone electrolysis unit. In the case of the sterilization rinsing step of rinsing, the control unit controls the ratio of the rotation ON time to one cycle of the drum to be shorter than the ratio of the rotation ON time to one cycle in the normal washing process. It is characterized by performing.

In the washing machine of the present invention, the ozone electrolytic unit is arranged in a substantially horizontal ozone generation region, and water is supplied to the ozone generation region in the downstream region via the valve arranged above, so that the valve can be opened and closed repeatedly. When the water supply channel is closed, the pressure inside the water supply channel becomes negative, and the ozone generation region is arranged substantially horizontally, so that the state in which the water inside is stored is maintained. As a result, the ozone electrolytic unit is always maintained in a state of being immersed in water, and it is possible to suppress a voltage rise and perform stable energization. It is possible to maintain the sterilizing and deodorizing effect without generating residual substances and without damaging the ozone electrolyzer.

Further, in the washing machine of the present invention, in a structure in which the outer tub containing the drum is arranged in the washing machine main body, the ozone generation region of the water supply channel is horizontal near the upper wall of the washing machine main body at a position adjacent to the rear surface of the outer tub. Since it is arranged in, it is easy to avoid interference with the drum, the outer tank, the drive device, and other pipes, and it is possible to suppress the influence on the product height. Further, since the water supply channels upstream and downstream of the ozone generation region are bent, it is easy to arrange the water supply channels as compactly as possible and realize a structure in which the ozone electrolytic portion can be inserted and removed from the bent portion.

Further, the washing machine of the present invention is configured by connecting a pair of piping portions for ozone generation piping with an elastic cylinder, supporting the ozone generation piping through the cylinder, and for each piping portion. Each ozone electrolytic part can be inserted and removed via the bent part on the upstream side or the downstream side. Therefore, it is possible to easily put in and take out the ozone electrolytic unit while avoiding an unreasonable stress on the ozone electrolytic unit. The structure is such that the washing water flows through the two ozone electrolyzers, so that the sterilization effect can be further enhanced.

Further, in the washing machine of the present invention, when the control unit controls the opening and closing of the valve and the energization to the ozone electrolysis unit, the control unit controls to switch the energization to the ozone electrolysis unit to ON after the valve is opened. Even if the ozone electrolyzer is immersed in water, it is possible to prevent the water from boiling and damaging the ozone electrolyzer.

Further, in the washing machine of the present invention, when the control unit controls the opening and closing of the valve and the energization of the ozone electrolytic unit, the control unit controls the valve to be closed after the energization of the ozone electrolytic unit is turned off. Even if the ozone electrolyzer is immersed in water, it is possible to prevent the water from boiling and damaging the ozone electrolyzer.

Further, in the washing machine of the present invention, in the sterilization rinsing step of rinsing while supplying ozone water with the power supply to the ozone electrolyzer turned on, the control unit controls the rotation of the drum at a predetermined cycle. Since the control is performed so that the ratio of the rotation ON time to one surrounding is shorter than the ratio of the ON time to one cycle in the normal washing process, sterilization and rinsing can be performed while preventing the generated ozone from disappearing immediately. It can be done effectively.

The front view which is a schematic diagram which shows the schematic structure in the washing machine which concerns on one Embodiment of this invention. The schematic side sectional view which shows the schematic structure including the appearance of the washing machine which concerns on one Embodiment of this invention. The perspective view which shows the concrete mounting structure around the ozone electrolysis part in the washing machine which concerns on one Embodiment of this invention. The vertical sectional view of the water supply channel around the ozone electrolysis part in the washing machine which concerns on one Embodiment of this invention. The flowchart which shows the procedure at the time of starting the sterilization of the washing machine which concerns on one Embodiment of this invention. The flowchart which shows the procedure at the time of stopping the sterilization of the washing machine which concerns on one Embodiment of this invention. The flowchart which shows the procedure of the sterilization rinsing process of the washing machine which concerns on one Embodiment of this invention.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic front view showing a schematic configuration inside a drum-type washing machine W, FIG. 2 is a schematic side sectional view showing a schematic configuration including the appearance of the washing machine W, and FIG. 3 is a schematic side sectional view inside the washing machine W. FIG. 4 is a perspective view showing a specific mounting structure around the ozone electrolytic portion in the washing machine W, and FIG. 4 is a vertical sectional view of a water supply channel around the ozone electrolytic portion in the washing machine W.

The washing machine body 1 has a substantially rectangular parallelepiped shape. An opening 11 for putting in and taking out laundry is formed in the front surface 10a of the washing machine main body 1, and an opening / closing lid (not shown) capable of opening / closing the opening 11 is attached. An outer tub 3 is arranged on the outside of the drum 2, and the washing tub 1b is composed of the drum 2 and the outer tub 3. The washing tub 1b is attached so that the axis of the washing tub 1b faces in a substantially horizontal direction.

The outer tub 3 is a bottomed tubular member arranged inside the washing machine main body 1 and having a side surface 3c and a rear surface 3d, and can store washing water inside.

The outer tub 3 is connected to a water supply passage 3a for supplying washing water to the inside and a discharge passage 3b for discharging the washing water to the outside. A water supply valve 31 is provided in the water supply channel 3a, and a drain valve 32 is provided in the discharge channel 3b. An electromagnetic valve is used for the water supply valve 31, and a drain valve controlled by a torque motor is used for the drain valve 32. Open / close signals Sv1 and Sv2 are input to these valves 31 and 32 from the control unit C. The water supply valve 31 is an ozone-dedicated water supply valve, and besides the water supply valve 31, there is a water supply valve (not shown) for supplying normal washing water, and the opening / closing control is performed by the control unit C. The water supply valve 31 operates only during sterilization and rinsing.

The drum 2 is a bottomed cylindrical member that is arranged coaxially with the outer tank 3 in the outer tank 3 and is rotatably supported. The drum 2 can accommodate laundry inside and has a large number of water passage holes on its wall surface.

The drum 2 is driven by the drive device Dr. The drive device Dr rotates the pulley 15 and the belt 15b by the motor 10 and rotates the drive shaft 17 extending toward the bottom 2d of the drum 2 to give a driving force to the drum 2 and rotate the drum 2. It is a thing. The motor 10 is controlled by the inverter 34, and a control signal Sm is input to the inverter 34 from the control unit C.

In the above configuration, the present embodiment includes an ozone generator 4 that generates ozone in the water supply channel 3a in order to sterilize the bacteria. The ozone generator 4 includes an ozone electrolyzer 41 arranged in an ozone generation region Ar provided substantially horizontally in a part of the water supply channel 3a, and opens and closes the water supply channel 3a above and upstream of the ozone generation region Ar. The water supply valve 31, which is the valve of the present invention, is arranged. The present embodiment is configured to maintain a state in which the ozone electrolytic unit 41 of the ozone generator 4 is constantly immersed in water in the ozone generation region Ar while the water supply valve 31 is repeatedly opened and closed.

That is, when the water supply valve 31 is closed upstream of the ozone generation region Ar while the water supply valve 31 repeatedly opens and closes, the inside of the water supply passage 3a becomes a negative pressure, and the ozone generation region Ar is arranged substantially horizontally. Therefore, the state where the water inside is stored is maintained. As a result, the ozone electrolytic unit 41 is always maintained in a state of being immersed in water, and it is possible to suppress a voltage rise and perform stable energization. Further, if the ozone generation region Ar is arranged vertically, there is a risk that the water in the piping portion will be completely drained when air enters and the ozone electrolytic unit 41 will be in an empty heating state, but if it is arranged horizontally. , The risk of being in an empty state is low even if air enters.

Specifically, as shown in FIGS. 2 to 4, the ozone generation region Ar of the water supply channel 3a is composed of the ozone generation pipe 33, and the ozone generation pipe 33 is the rear surface of the outer tank 3. It is arranged near the upper wall 1a of the washing machine main body 1 at a position adjacent to 3d, and is suspended and supported by the washing machine main body 1 via a bracket 5 which is a support member. The ozone generation pipe 33 is formed with a first connecting portion 33a extending upward on the upstream side and a second connecting portion 33b extending downward on the downstream side.

The first connection portion 33a is connected to the water supply valve 31 via the first pipeline 35a, and the second connection portion 33b is connected to the water supply port 3d1 provided on the rear surface of the outer tank 3 via the second pipeline 35b. .. The first connection portion 33a has a funnel shape, and the inlet to the ozone generation region Ar is formed with a small diameter. The diameter of the ozone generation pipe 33 is also set to be substantially the same small diameter in order to increase the electrolysis efficiency of the ozone electrolysis unit. An introduction pipe 36 for introducing washing water from the outside is connected to the water supply valve 31, and when the water supply valve 31 is opened, external washing water will flow into the water supply channel 3a and will be supplied to the washing tub 1b via the water supply port 3d1. It has become.

That is, when viewed from the ozone generation pipe 33 forming the ozone generation region Ar, the washing water falls from the upstream side, flows in from the first connection portion 33a on the one end side, flows substantially horizontally inside, and in the downstream region. It has a structure in which it falls from a certain second connection portion 33b and flows out.

Since the ozone generation region Ar is arranged substantially horizontally in this way, it is easy to avoid interference with the drum 2, the outer tank 3, the drive device Dr, and other pipes, and it is possible to suppress the influence on the product height. can.

As shown in FIG. 4, the ozone generation pipe 33 is a liquid-tight connection between a pair of pipe portions 33c and 33c arranged in series with a gap between them and the opposite ends of both pipe portions 33c and 33c. The elastic cylinder 33d is suspended from the upper wall 1a of the washing machine main body 1 via a bracket 5. The other ends of the piping portions 33c and 33c are opened horizontally at the upstream side with an upward crank-shaped bent portion 3x and on the downstream side with a downward crank-shaped bent portion 3y, and are opened horizontally through these openings. The ozone electrolysis unit 41 can be inserted and removed. The ozone electrolytic unit 41 has a flange portion 41a attached to the base end, and has a structure in which the flange portion 41a can be screwed to the open end of the piping portion 33c. A wiring 41b for energizing the ozone electrolytic unit 41 is drawn from the flange portion 41a and is connected to the energizing portion 40 shown in FIG. An energization ON / OFF signal Se is input from the control unit C to the energization unit 40. The wiring 41b is passed through a fuse 4x provided in the piping portion 33c, and in the unlikely event of overheating, the fuse 4x is blown to protect the ozone electrolytic portion 41.

In this way, the ozone generator 4 passes a pair of electrolytic units 41 and 41 in series to generate ozone by electrolysis of water, so that the first electrolytic unit 41 initially sterilizes water. After purification, the ozone concentration is increased in the next electrolysis unit 41, and the required concentration and required amount of ozone water can be reliably and stably supplied to the washing tub 1b. Further, when the initial sterilization is unnecessary, the concentration of ozone water supplied to the washing tub 1b can be further increased. Further, no residual substance is generated due to ozone generation.

Further, since the ozone generator 4 is arranged horizontally and the electrolytic portions 41 and 41 can be inserted and removed at the bent portions 3x and 3y on both sides, the ozone electrolytic portion 41 is arranged substantially horizontally. Coupled with this, it is possible to maintain the state in which the ozone electrolyzer is always immersed in water. Further, only the deteriorated electrolytic unit 41 needs to be cleaned or replaced, and a long electrode or a special electrode is not required. Therefore, maintenance of the ozone electrolytic unit 41 is easy and contributes to cost reduction.

In the present embodiment configured as described above, the control unit C controls the opening / closing of the water supply valve 31 and the energization ON / OFF control of the ozone electrolysis unit 41.

Further, in the present embodiment, the control unit C controls the rotation of the drum 2 by the motor 10 and controls the energization ON / OFF of the ozone electrolysis unit 41.

Hereinafter, the procedure performed by the control unit C will be described with reference to the flowcharts of FIGS. 5 to 7.
First, FIG. 5 is a sequence at the start of sterilization.

<Step S1>
The control unit C switches the water supply valve 31 from closed to open in step S1. As a result, water supply to the washing tub 1b is started via the ozone generation device 4.

<Step S2>
Next, the control unit C determines whether or not the water level in the drum 2 has started to rise in step S2. Therefore, a signal of a water level sensor or a water flow sensor (not shown) provided in the washing machine main body 1 is input to the control unit C. Then, if YES, the process proceeds to step S3, and if NO, step S2 is repeated.

<Step S3>
In response to the result of YES in step S2, the control unit C switches the energization of the ozone electrolysis unit 41 from OFF to ON in step S3. As a result, the ozone electrolytic unit 41 electrolyzes the washing water to generate ozone.

In this way, the control unit C switches the water supply valve 31 from the closed state to the open state at the start of the sterilization rinse in the washing process, and after directly or indirectly detecting the rise in the water level in the drum 2, the ozone electrolysis unit 41 is reached. Controls to switch the energization of the power supply from OFF to ON.

That is, since the ozone electrolyzer is turned on after the water supply is started first, even if the ozone electrolyzer 41 is immersed in water, it is possible to prevent the water from boiling and damaging the ozone electrolyzer 41. Of course, instead of detecting the rise in the water level, the energization may be switched after a predetermined time has elapsed from the switching of the water supply valve 31.

FIG. 6 is a sequence when sterilization is stopped. The sequence of stopping sterilization is started at a timing preset in the control unit C.

<Step S11>
The control unit C switches the energization of the ozone electrolysis unit 41 from ON to OFF in step S1. As a result, the ozone electrolysis unit 41 stops the electrolysis of the washing water.

<Step S12>
Next, the control unit C determines whether or not a predetermined time has elapsed since the energization of the ozone electrolysis unit 41 was turned off in step S12. This is because the electrolysis phenomenon does not stop instantly. Then, if YES, the process proceeds to step S13, and if NO, step S12 is repeated.

<Step S13>
Upon receiving YES in step S12, the control unit C switches the water supply valve 31 from open to closed in step S13. As a result, the water supply to the washing tub 1b via the ozone generation device 4 is stopped.

In this way, the control unit C switches the energization of the ozone electrolyzer 41 from ON to OFF when the sterilization is stopped in the washing process, and after a predetermined time has elapsed from the switching, the control unit C energizes the ozone electrolyzer 41 from ON. Controls to switch to OFF.

That is, since the water supply is stopped after the ozone electrolysis unit 41 is turned off first, it is possible to prevent the water from boiling and damaging the ozone electrolysis unit 41 even if the ozone electrolysis unit 41 is immersed in water.

FIG. 7 is a sequence during sterilization and rinsing. Sterilization associated with water supply from the water supply channel 3a and rotation of the drum 2 are performed under certain conditions.

<Steps S21, S21a>
The control unit C stops the drum 2 in step S21. While the drum is stopped, the water supply valve 31 is switched from closed to open, and the ozone electrolyzer 41 is also switched from OFF to ON until the ozone water supply reaches the set water level. Whether or not the set water level has been reached is determined in step 21a, and if YES, the process proceeds to step S22.

<Step S22>
The control unit C starts the rotation of the drum in step S22. At this time, the water supply valve 31 is switched from open to closed, and the ozone electrolyzer 41 is also switched from ON to OFF.

<Step S23>
After the rotation of the drum starts, the control unit C determines in step S23 whether or not the water level has dropped below, for example, a predetermined water level. If NO, the next step S24 is skipped, and if YES, the ozone replenishment step of step S24 is executed.

<Step S24>
If the control unit C determines YES in step S23, the water supply valve 31 is switched from closed to open while rotating the drum 2 in the forward and reverse directions at regular intervals until the water level returns to a predetermined level, and the energization to the ozone electrolyzer 41 is also turned off. Switch from to ON to replenish ozone water. The drum rotation control by the control unit C during ozone water replenishment is different from the normal washing process, and the drum rotation ON time and the drum rotation OFF time in one cycle are different. For example, assuming that the drum rotation ON time is 8 seconds and the drum rotation OFF time is 2 seconds in the step of supplying washing water other than ozone water and the process of step S22 not supplying ozone water, the drum rotation is performed when the ozone water is replenished. The ON time is 2 seconds and the drum rotation OFF time is 8 seconds. The drum rotation ON time in one cycle is reduced and the drum OFF time is increased to prevent the ozone from being extinguished immediately.

<Step S25>
The control unit C determines whether or not a predetermined time has elapsed since the drum started to rotate in step S25. Therefore, the control unit C operates the timer at the start of the sterilization rinsing process. Then, if YES, the process ends, and if NO, the process returns to the front of step S22.

In this way, in the sterilization rinsing step in which the control unit C performs rinsing while supplying ozone water with the energization of the ozone electrolysis unit 41 turned on, the control unit C controls the rotation of the drum 2 at a predetermined cycle. In doing so, the control is performed so that the ratio of the rotation ON time to one circumference is shorter than the ratio of the ON time to one cycle in the normal washing process.

That is, even if ozone is generated, it is easily extinguished by the water flow generated during the rotation of the drum 2. On the other hand, if the ratio of the rotation ON time to one cycle of the drum 2 is reduced during ozone water replenishment as in the present embodiment, it is possible to prevent the generated ozone from disappearing immediately, and sterilization and rinsing can be performed. It can be done effectively.

Although one embodiment of the present invention has been described above, the specific configuration of each part is not limited to the above-described embodiment.

For example, in the above embodiment, the ozone generator 4 is configured by a pair of ozone electrolyzers 41, but there may be only one ozone electrolyzer 41, and in this case, ozone electrolysis is performed from one or the other of the ozone generation regions Ar. The portion 41 may be made removable.

Further, the ozone generation device 4 may be configured on a normal water supply channel, but may be configured by providing a water supply channel dedicated to ozone separately from the normal water supply channel.

Other configurations can be variously modified without departing from the spirit of the present invention.

1 ... Washing machine body 1a ... Upper wall 1b ... Washing tub 2 ... Drum 3 ... Outer tub 3a ... Water supply channel 3d ... Rear surface 3x, 3y ... Bending part 4 ... Ozone generator 5 ... Support member (bracket)
31 ... Valve (water supply valve)
33c ... Piping unit 33d ... Elastic cylinder 41 ... Ozone electrolyzer Ar ... Ozone generation area C ... Control unit W ... Washing machine

Claims (6)

It is equipped with a water supply channel for supplying water to the washing tub and an ozone generator that generates ozone in the water supply channel.
The ozone generator includes an ozone electrolyzer that is provided in a part of the water supply channel and is arranged substantially horizontally along the flow direction of water in a horizontally long ozone generation region along the substantially horizontal direction. A valve for opening and closing the water supply channel is arranged above and upstream of the generation area.
A washing machine characterized in that the ozone electrolytic unit of the ozone generator is configured to always maintain a state of being immersed in water in the ozone generation region while the valve is repeatedly opened and closed. It includes a washing machine main body, an outer tub arranged in the washing machine main body, and a drum that can rotate in the outer tub.
The ozone generation region of the water supply channel is arranged near the upper wall of the washing machine main body at a position adjacent to the rear surface of the outer tank, and at least one of the upstream side or the downstream side of the ozone generation region is located in the water supply channel. The washing machine according to claim 1, wherein the washing machine is provided so as to be bent with respect to the ozone generation region, and the ozone electrolytic portion can be inserted into and removed from the ozone generating region through the bent portion. The ozone generation piping constituting the ozone generation region is composed of a pair of piping portions arranged in series with a gap between them and an elastic cylinder body that is liquid-tightly connected between the two piping portions. Is supported by the washing machine body via the support member, and the ozone electrolytic part can be inserted and removed in each piping part via the bent part of the water supply channel on the upstream side and the bent part of the water supply channel on the downstream side. The washing machine according to claim 2, wherein the washing machine is characterized by the above. A washing machine main body, an outer tub arranged in the washing machine main body, and a drum that can rotate in the outer tub are provided.
It is provided with a control unit that controls opening / closing control of the valve and energization ON / OFF control of the ozone electrolysis unit.
At the start of sterilization in the washing process, the control unit switches the valve from the closed state to the open state, and after a predetermined time has elapsed from the switching of the valve or after directly or indirectly detecting an increase in the water level in the drum, the control unit has started. The washing machine according to any one of claims 1 to 3, wherein the washing machine is controlled to switch the energization of the ozone electrolytic unit from OFF to ON. It is provided with a control unit that controls opening / closing control of the valve and energization ON / OFF control of the ozone electrolysis unit.
The control unit switches the energization of the ozone electrolysis unit from ON to OFF when the sterilization is stopped in the washing process, and controls the valve to be switched from the open state to the closed state after a predetermined time has elapsed from the switching. The washing machine according to any one of claims 1 to 4, wherein the washing machine is characterized by the above. A washing machine main body, an outer tub arranged in the washing machine main body, and a drum that can rotate in the outer tub are provided.
It is provided with a control unit that controls rotation ON / OFF control of the drum at a predetermined cycle and energization ON / OFF of the ozone electrolysis unit.
When the sterilization step in the washing step is a sterilization rinsing step in which rinsing is performed while supplying ozone water with the power supply to the ozone electrolyzer turned on, the control unit occupies one cycle of the drum. The washing machine according to any one of claims 1 to 5, wherein the washing machine is controlled so that the ratio of the rotation ON time is shorter than the ratio of the rotation ON time to one cycle in a normal washing process.

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