JP2017176819A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washing machine capable of facilitating infiltration of UFB water into laundry.SOLUTION: A washing machine 1 includes: a body 2; a water tub 3 provided inside the body 2; a washing and dewatering tub 4 which is provided rotatably in the water tub 3, and in which laundry 20 is inputted; an UFB generator 13 (fine bubble inclusion part) for allowing water supplied to the washing and dewatering tub 4 to include fine bubbles; and a control part 7 for controlling the rotation of the washing and dewatering tub 4 and the water supply to the washing and dewatering tub 4. During a water supply period in which water is supplied to the washing and dewatering tub 4, the washing and dewatering tub 4 is rotated.SELECTED DRAWING: Figure 1

Description

  Embodiments described herein relate generally to a washing machine.

  Conventionally, the washing performance has been improved by immersing the laundry in water (hereinafter referred to as UFB water) containing fine bubbles (hereinafter referred to as UFB (Ultra Fine Bubble)) having a particle size of generally less than 1 μm. There is a washing machine (see, for example, Patent Document 1). At this time, in the case where UFB water is infiltrated into the laundry, for example, a method of supplying UFB water from above the laundry dewatering tank and sprinkling the laundry, or storing UFB water in the lower part of the laundry dewatering tank A method of soaking may be considered.

Japanese Patent No. 5060976

However, in a washing machine for washing various clothes, it is assumed that it is difficult to immerse the laundry in UFB water. For example, when supplying UFB water from above, the water pressure decreases when passing through the fine bubble-containing part that contains UFB in water, so the flow rate decreases and the momentum of the supplied water decreases. As a result, it becomes difficult to apply the UFB water evenly to the laundry. Or, since laundry such as dry clothes easily floats in water, even if UFB water is stored in the lower part of the washing and dewatering tank, it is difficult to permeate the floating clothes into the clothes.
Therefore, a washing machine that can promote the penetration of UFB water into the laundry is provided.

  The washing machine according to the embodiment includes a main body, a water tank provided in the main body, a laundry dewatering tank rotatably provided in the water tank, and fine bubbles in water supplied to the laundry dewatering tank. And a controller for controlling rotation of the laundry dewatering tub and supply of water to the laundry dewatering tub, and in the water supply period for supplying water to the laundry dewatering tub Rotate.

The figure which shows typically the structure of the washing machine by 1st Embodiment. The figure which shows typically an example of the water supply state at the time of rotating a washing dehydration tank The figure which shows an example of the difference in the cleaning degree in UFB water and tap water The figure which shows typically an example of the water supply state at the time of rotating the washing dewatering tank in 2nd Embodiment. The figure which shows typically the structure of the UFB generator in 3rd Embodiment. The figure which shows typically an example of the difference in the momentum of the water supplied from a supply port The figure which shows typically an example of the supply ratio of UFB water and tap water in a water supply period The figure which shows typically an example of the water supply state by 4th Embodiment The figure which shows typically the structural example of the supply port by other embodiment.

Hereinafter, a plurality of embodiments will be described with reference to the drawings. In addition, in each embodiment, the same code | symbol is attached | subjected and demonstrated to the substantially same component.
(First embodiment)

  Hereinafter, a first embodiment will be described with reference to FIGS. 1 to 3. As shown in FIG. 1, the washing machine 1 includes a main body 2, a water tank 3, a laundry dewatering tank 4, a stirring blade 5, a drive unit 6, a control unit 7, an operation panel 8, and the like. The main body 2 is generally formed in a quadrangular prism shape and accommodates a water tank 3 and the like. The water tank 3 is generally formed in a bottomed cylindrical shape, and stores water in a washing process or an excessive process. The washing / dehydrating tank 4 is rotatably provided in the water tank 3 and rotates relative to the water tank 3. In the dewatering process, the laundry dewatering tub 4 rotates at a relatively high speed, so that water is discharged from the clothing or the like by centrifugal force. During the washing operation, the opening of the water tank 3 is closed by the inner lid 4a.

  The stirring blade 5 is also called a pulsator or the like, and can be rotated integrally with the washing / dehydrating tub 4 and can be rotated independently of the washing / dehydrating tub 4. The washing and dewatering tub 4 and the stirring blade 5 are rotationally driven by a driving unit 6 having a clutch mechanism (not shown). Hereinafter, the fact that the stirring blade 5 rotates integrally with the washing / dehydrating tub 4 is referred to as integral rotation for convenience, and the fact that the stirring blade 5 rotates independently independently of the washing / dehydrating tub 4 is referred to as independent rotation for convenience. This is called rotation. These integral rotation and single rotation are switched by a clutch mechanism.

  The control unit 7 includes a microcomputer having a CPU, a ROM, a RAM, and the like (not shown), and controls the entire washing machine 1. The control unit 7 controls the washing machine 1 according to the type of clothes, the driving course, and the like input from the operation panel 8. Moreover, although the detail is mentioned later, the control part 7 sets a target water level, a 1st water level, and a 2nd water level.

  The operation panel 8 includes a power switch (not shown), a selection switch for selecting an operation course, an energy saving mode, a weight setting switch for indicating the weight of the laundry 20 to be put in, and a water level for setting the water level during the washing process. It consists of a switch and a display for displaying various information. The operation switch displays a time required for the washing operation, a current operation mode, and the like while a user operation is input. In the case of this embodiment, the operation panel 8 is also provided with a switch for selecting the type of detergent, that is, whether it is a liquid detergent or a powder detergent. The operation panel 8 corresponds to a detergent specifying part.

  Above the water tank 3 and the washing / dehydrating tank 4, a water supply path 9 for supplying water into the washing / dehydrating tank 4 from above the washing / dehydrating tank 4 is provided. The water supply path 9 includes a water supply valve unit 10, a detergent case 11, a supply port 12, a UFB generator 13, and the like. The water supply valve unit 10 is provided with a tap water introduction port 14 connected to a faucet for introducing tap water, and a bath water introduction port 15 for introducing bath water or the like. In addition, the bath water introduction port 15 does not necessarily need to be provided, and may be configured to also serve as the tap water introduction port 14. In the case of this embodiment, the supply port 12 is provided so as to be positioned on the radially outer side with respect to the rotation center of the washing / dehydrating tub 4. The supply port 12 is provided so as to open horizontally or obliquely downward.

  In the water supply valve unit 10, a water supply valve 16 that switches the flow of water to the first path via the UFB generator 13 and a water supply valve that switches the flow of water to the second path that does not pass through the UFB generator 13. 17 is provided.

  The detergent case 11 is loaded with a detergent used for washing. The detergent case 11 can be filled with either liquid detergent or powder detergent. In addition, you may further provide the softener case which throws in a softener. In this embodiment, the detergent case 11 is provided in the water supply path 9. Therefore, water in which the detergent is dissolved is supplied to the laundry dewatering tank 4. In other words, the detergent put into the detergent case 11 is supplied into the washing / dehydrating tub 4 from above the washing / dehydrating tub 4 together with the water flowing through the water supply path 9.

  The UFB generator 13 generates fine bubbles 13b (see FIG. 4) having a particle size of less than about 1 micron, and the generated fine bubbles 13b are contained in the water flowing through the water supply path 9. The fine bubbles 13b having a particle size of less than about 1 micron are also called UFB (Ultra Fine Bubble) and are known to improve the washing performance. Hereinafter, the water containing the fine bubbles 13b is referred to as UFB water for convenience. The UFB generator 13 corresponds to a fine bubble containing part.

  In addition, the laundry dewatering tub 4 is provided with a weight sensor 18 that detects the weight of the laundry 20. In the present embodiment, the control unit 7 sets a target water level that is a water level during the washing process, based on the weight of the laundry 20 detected by the weight sensor 18. Although the weight sensor 18 may directly detect the weight, the weight sensor 18 indirectly detects the weight by estimating based on a control value when the control unit 7 controls the motor of the driving unit 6. There may be. As described above, the weight can also be set from the operation panel 8. The weight sensor 18 and the control unit 7 correspond to a weight specifying unit that specifies the weight of the laundry 20.

  Further, the washing machine 1 is provided with a water level sensor 19 as a water level specifying unit that directly detects the water level in an air tube (not shown) connected to the water tank 3. The water level sensor 19 corresponds to a water level detection unit. The position and configuration of the water level sensor 19 are not limited to this. For example, the time when water is supplied by an internal timer of the control unit 7 is measured, the total amount of supplied water is obtained from the measured time and the flow rate of water, and the water level is indirectly detected based on the total amount of water. It is good also as a structure. In that case, for example, the control unit 7 corresponds to a water level detection unit.

  Next, the operation of the above configuration will be described.

  As described above, it is considered that the washing ability can be improved by immersing the laundry 20 in UFB water. However, when it passes through the UFB generator 13, the water pressure decreases, so the flow rate decreases. As a result, as shown in FIG. 2A, the water supply state in the laundry dewatering tub 4 is relatively small in the range in which the UFB water is directly sprinkled (R1, hereinafter referred to as the water supply range). It may be difficult to apply UFB water evenly to the object 20a. Or, since the laundry 20a such as dry clothes and especially synthetic fiber shirts and underwear easily floats on the water, the UFB water is stored even if the UFB water is stored from the lower part of the washing dehydration tank 4. It becomes difficult to infiltrate.

  At this time, if the rotating shaft is horizontal or slightly upward and the drum-type washing machine is washed by a tapping washing method in which clothes are lifted and dropped, it is considered that UFB water can be efficiently infiltrated. However, in the case of a vertical washing machine that is washed with the mechanical force when the stirring blade 5 is rotated and the water flow generated thereby as in the washing machine 1 of the present embodiment, UFB water penetrates into the floating clothes. It takes time to make it happen.

  Therefore, in the washing machine 1 of the present embodiment, UFB water is efficiently infiltrated into the laundry 20 as follows in a vertical washing machine into which various clothes are put.

  First, the basic flow of the washing operation in the washing machine 1 will be described. When the water supply valve 16 is turned ON and water supply is started, the washing machine 1 supplies UFB water while rotating the laundry dewatering tub 4 and the stirring blade 5 in an integrated manner. FIG. 2A shows an example when water is supplied without rotating the washing and dewatering tub 4. In the case of this FIG. 2 (A), the UFB water supplied from the supply port 12 is spot-supplied to one place of the water supply range (R1). For this reason, if the UFB water is accumulated in this state, the laundry 20a such as relatively light clothes floats on the UFB water.

  On the other hand, the washing machine 1 supplies water while rotating the laundry dewatering tub 4 during the water supply period in which UFB water is supplied to the laundry dewatering tub 4. Further, the supply port 12 is provided so as to be located on the outer side in the radial direction from the rotation center of the washing / dehydrating tank 4. For this reason, even if the UFB water supplied from the supply port 12 is spot-supplied to the water supply range (R1), the washing / dehydrating tub 4 rotates, and therefore, as shown in FIG. R2) becomes a donut shape along the laundry dewatering tub 4, and the UFB water falls on the entire laundry 20.

  As a result, the UFB water is sprinkled on the entire laundry 20, and when the wet laundry 20 becomes a weight and the UFB water accumulates in the laundry dewatering tub 4, the laundry 20 is caused by its own weight. It is drawn into the UFB water in such a manner that it is pushed by the laundry 20 that has already penetrated the UFB water located above. As a result, UFB water can be infiltrated into the laundry 20.

  In the case of the relatively light laundry 20a, UFB water falls from above when the laundry 20a enters the water supply range (R1) as it rotates. Thereby, UFB water can be permeated also into the comparatively light laundry 20a. In addition, since the laundry dewatering tub 4 is rotated, the laundry 20a that floats on the water moves into the water supply range (R1, R2) by centrifugal force, so that the UFB water falls further. It is possible to promote the penetration of UFB water.

  FIG. 3 is an example of a comparison result of cleaning ability between UFB water and tap water. As shown in FIG. 3 (A), the cleanliness indicating the cleaning ability of UFB water against sebum dirt is improved by about 15% in terms of a simple numerical ratio compared to the cleanliness of tap water. Yes. In addition, the cleanliness of UFB water for coffee stains is improved by about 50% compared to the cleanliness of tap water. In addition, with respect to coffee stains, a simple numerical ratio improves approximately 40%. Thereby, the improvement of the washing | cleaning capability in the case of supplying UFB water was confirmed.

  According to the embodiment described above, the following effects can be obtained.

  The washing machine 1 rotates the washing / dehydrating tub 4 during a water supply period for supplying UFB water to the washing / dehydrating tub 4. Thereby, the penetration of UFB water into the laundry can be promoted.

  In addition, since the laundry dewatering tub 4 is rotated, the laundry 20a that floats on the water moves into the water supply range (R1, R2) by centrifugal force, so that the UFB water falls further. It is possible to promote the penetration of UFB water.

  Further, the washing machine 1 is provided with the supply port 12 so as to be located on the radially outer side with respect to the rotation center of the washing and dewatering tank 4. Thus, when the laundry dewatering tub 4 is rotated, the water supply range (R2) is formed in a donut shape in the laundry dewatering tub 4 as shown in FIG. UFB water can be sprinkled efficiently. Therefore, even when the flow rate is relatively small, the UFB water can be effectively infiltrated into the laundry 20 and the cleaning effect can be improved.

  In addition, the washing machine 1 includes a detergent case 11 that accommodates detergent supplied from the supply port 12 into the washing and dewatering tank 4 together with UFB water on the downstream side of the UFB generator 13 in the water supply path 9. Thereby, since the detergent is dissolved in UFB water, it is supplied in a state where the interface is activated by the action of the fine bubbles 13b. Therefore, the cleaning performance can be improved.

(Second Embodiment)
Hereinafter, the second embodiment will be described with reference to FIG. In addition, the structure of the washing machine 1 is common to 1st Embodiment.

  As described in the first embodiment, the UFB water can be effectively infiltrated into the laundry 20 by rotating the laundry dewatering tub 4 during the water supply period. However, when it continues to rotate at a constant speed (hereinafter referred to as “continuous rotation for convenience”), the centrifugal force acts to prevent the laundry 20 from being effectively infiltrated with the UFB water. Is also possible.

  Specifically, as shown in FIG. 4A, when centrifugal force (F1) is applied, UFB water sprinkled on the upper part of the laundry 20 is pushed out to the outer peripheral side of the laundry dewatering tub 4 by centrifugal force. Alternatively, the water supply state is made such that it is repelled to the outer peripheral side of the laundry dewatering tub 4 at the moment when it is applied to the laundry 20. As a result, there is a possibility that the laundry 20 located on the center side of the laundry dewatering tub 4 does not directly contact the UFB water poured from the upper part or the UFB water already stored, and the UFB water does not permeate. And if UFB water does not permeate into the laundry 20, it will not become a weight, so even if UFB water is stored in the laundry dewatering tub 4, clothing may float and impede the penetration of UFB water. .

  Therefore, the washing machine 1 of the present embodiment sets a deceleration period during which the rotation of the washing / dehydrating tub 4 is decelerated from the above-described constant speed or a stop period during which the rotation of the washing / dehydrating tub 4 is stopped during the water supply period. . At this time, the washing and dewatering tub 4 may be operated intermittently by alternately or periodically setting the deceleration period and the stop period (hereinafter referred to as intermittent rotation for convenience).

  Moreover, the washing machine 1 makes the rotational speed at the time of rotating the laundry dewatering tank 4 in the water supply period lower than the rotational speed at the time of rotating the laundry dewatering tank 4 in the dewatering process. That is, the laundry 20 is rotated at a speed that does not stick to the inner peripheral wall of the laundry dewatering tub 4.

  Thereby, in the deceleration period, as shown in FIG. 4B, the generated centrifugal force (F2) is smaller than the centrifugal force (F1) when rotating at a constant speed. That is, the amount of UFB water pushed out to the outer peripheral side of the washing and dewatering tank 4 is reduced. Therefore, UFB water can be infiltrated into the laundry 20.

  Alternatively, during the stop period, as shown in FIG. 4C, centrifugal force is not generated, so the UFB water is equalized in the laundry dewatering tub 4. As a result, the laundry 20 is drawn down into the UFB water by being spread down by the whole laundry 20 and being pushed down by the laundry 20 that has become a weight. Therefore, UFB water can be infiltrated into the laundry 20.

  Further, the washing machine 1 rotates the washing / dehydrating tub 4 at a speed that is lower than the rotation speed when the washing / dehydrating tub 4 is rotated in the dehydration process and the laundry 20 does not stick to the inner peripheral wall of the washing / dehydrating tub 4. Let Thereby, the centrifugal force applied to the UFB water can be relatively reduced, and the UFB water can be prevented from penetrating only the laundry 20 located on the inner peripheral wall side of the laundry dewatering tub 4.

(Third embodiment)
Hereinafter, the third embodiment will be described with reference to FIGS. In addition, the structure of the washing machine 1 is common to 1st Embodiment. Also in this embodiment, the continuous rotation, intermittent rotation, or stop of the washing / dehydrating tub 4 is appropriately controlled during the water supply period.

  As shown in FIG. 5, the UFB generator 13 is provided with a protruding throttle portion 13 a so that the cross-sectional area is reduced in the flow path of water to depressurize the water, so that the pressure applied to the water is reduced from the atmospheric pressure to the negative pressure. By doing so, the air dissolved in water is deposited and the fine bubble 13b is contained in water. At this time, the flow rate of water decreases by passing through the UFB generator 13. Specifically, for example, when water is supplied to the UFB generator 13 at a flow rate of W1, the flow rate of water after passing through the UFB generator 13 is, for example, W2 smaller than W1.

  For this reason, when only the water that has passed through the UFB generator 13 is supplied to the washing and dewatering tank 4, it is discharged from the supply port 12 that opens horizontally or obliquely downward, as shown in FIG. As the momentum of water becomes relatively small, the extent of spread, that is, the water supply range also becomes relatively small. Moreover, since the flow rate of the supplied water is W2, which is smaller than W1, the arrival time to the target water level is relatively long. However, the ratio of the UFB water contained in the water supplied to the washing / dehydrating tank 4 is maximum (100%), and the action of the fine bubbles 13b can be utilized to the maximum.

  On the other hand, when only water that does not pass through the UFB generator 13 is supplied to the washing / dehydrating tub 4, the momentum of water discharged from the supply port 12 becomes relatively large as shown in FIG. 6B. , The way of spreading is also relatively large. That is, the water supply range in which water can be supplied is increased. Moreover, since the flow rate of the supplied water is W1 larger than W2, the arrival time to the target water level is relatively short. However, in this case, the proportion of UFB water contained in the water supplied to the washing / dehydrating tub 4 is minimized (0%), and the action of the fine bubbles 13b does not occur.

  That is, there are merits and demerits in the case of supplying only UFB water via the UFB generator 13 and the case of supplying only water not via the UFB generator 13.

  Therefore, the washing machine 1 according to the present embodiment uses either the first path side that passes through the UFB generator 13 or the second path side that does not pass through the UFB generator 13 for the path of water supplied from the supply port 12. Water is supplied to the washing and dewatering tub 4 while switching to a path that passes through, a path that passes through both the first path side and the second path side, or in a state where the path of water flowing through the water supply path 9 is fixed. In addition, the state which fixed the path | route of water means not switching a path | route.

Specifically, in the case of a route that passes through both the first route side and the second route side, the state of the water supplied to the washing and dewatering tub 4 is the state shown in FIG. , For convenience (referred to as UFB water supply alone) and the state of FIG. 6B (hereinafter referred to as tap water supply for convenience) (hereinafter referred to as mixed supply for convenience) Become. Therefore, the flow rate, that is, the water supply time required to reach the target water level has the following relationship.
UFB water supply alone <Mixed supply <Tap water supply alone

On the other hand, the ratio of UFB water, that is, the effect of improving the cleaning ability by the fine bubbles 13b is as follows.
UFB water supply alone> Mixed water supply> Tap water supply alone

  Now, the mixing ratio of UFB water and tap water can be switched according to the type of washing operation. For example, when the input amount of the laundry 20 is large, the target water amount to be supplied increases accordingly. At this time, since the flow rate is reduced in the case of supplying UFB water alone, if the laundry is washed only with UFB water, the time required to reach the target water level is increased, and the time required for the washing operation is increased. Become. Further, since the cleaning performance is improved if the mixing ratio of UFB water is high, it is thought that the time for the washing process can be shortened by that amount. However, as shown in FIG. There is also. In addition, there is a concern that the user-friendliness deteriorates due to the longer time required for the washing operation.

  For this reason, it is desired to prevent the deterioration of usability while performing control for improving the cleaning performance using UFB water. For that purpose, it is desirable to switch the mixing ratio of UFB water and tap water by the trade-off between cleaning ability and water supply time. At this time, it is desirable to switch the mixing ratio depending on the amount of the laundry 20.

  Therefore, the washing machine 1 of the present embodiment supplies water to the washing and dewatering tub 4 while switching the path of the water flowing through the water supply path 9 or fixing the path of the water flowing through the water supply path 9 during the water supply period. Supply.

  The water supply example I shown in FIG. 7 is an example of water supply when the amount of the laundry 20 is large. In this case, the target water level is, for example, about 60 liters. In the first half of the water supply period, more specifically, in the present embodiment, the washing machine 1 supplies only UFB water at the beginning of the water supply period, and then supplies only tap water. In addition, in FIG. 7, the range which attached | subjected diagonally hatching shows the water supply of only UFB water, and the range which attached | subjected horizontal hatching shows only the tap water or the water supply which mixed tap water and UFB. Yes.

  More specifically, in the configuration in which the detergent case 11 exists on the downstream side of the UFB generator 13, a predetermined time (predetermined period) from the start of the water supply period in which the detergent is estimated to remain in the detergent case 11. Water is supplied from the first path (UFB water alone water supply) until 30 seconds here, and after a predetermined time has passed, water is supplied only through the second path (tap water alone water supply). In addition, it is good also as mixed supply water instead of UFB water supply alone.

  The detergent put in the detergent case 11 is considered to be able to supply the entire amount into the washing and dewatering tank 4 if there is approximately 2 to 3 liters of water. At this time, if the flow rate in the case of only UFB water is 6 liters per minute, a liquid in which UFB water and a detergent are mixed (hereinafter referred to as a cleaning liquid for convenience) can be supplied in about 20 seconds. . That is, at the beginning of the water supply period, the detergent stored in the detergent case 11 can be dissolved in the UFB water by supplying only the UFB water while being fixed to the first path. In the case of tap water supply alone, the flow rate is approximately 15 liters per minute.

  At this time, the dispersibility of the detergent is improved by the fine bubbles 13b, so that the cleaning liquid can be more effectively penetrated into the laundry 20 than in the case of tap water alone, and the cleaning ability can be improved. it can. In addition, the washing machine 1 supplies tap water alone in a state where it is fixed to the second path, more strictly, after a predetermined time has elapsed in the latter half of the water supply period. Thereby, the time required to reach the target water level can be greatly reduced as compared with the case where only the UFB water is supplied alone, and the usability can be suppressed from deteriorating.

  Moreover, the water supply example II shown in FIG. 7 is a water supply example when the amount of the laundry 20 is usually about 3 kg to 6 kg which is frequently used in actual use, for example. In this case, the target water level is about 40 liters, for example. It is. Also in this case, the washing machine 1 performs the UFB water single water supply in the initial period of the water supply period in which the detergent remains in the detergent case 11, and thereafter performs the tap water single water supply and the UFB water single water supply every predetermined time. Supply water while switching. That is, the washing machine 1 supplies water while switching the path of water flowing through the water supply path 9 between the first path and the second path. As a result, the cleaning ability can be improved while preventing the water supply time from becoming excessively long.

  Moreover, the water supply example III shown in FIG. 7 is a water supply example when the amount of the laundry 20 is small, and in this case, the target water level is, for example, about 20 liters. In this case, even if only the UFB water supply is performed, the target water level can be reached in about 3 minutes. In other words, even if water is supplied through a route that maximizes the cleaning ability, it is considered that the usability does not deteriorate so much. For this reason, the washing machine 1 supplies water with the UFB water alone water supply, that is, the water supply path 9 fixed to the first path until the target water level is reached.

  Thus, the washing machine 1 of this embodiment supplies the UFB water to the first half of the water supply period in which the detergent remains in the detergent case 11 or the first half of the water supply period including the initial period of the water supply period, thereby providing a detergent effect. On the other hand, by changing the mixing ratio of UFB water and tap water according to the target water level, both improvement in cleaning ability and prevention of deterioration in usability are realized.

  And by using such a control method, at the initial stage of the water supply period in which the detergent remains in the detergent case 11, the water supply with UFB water is always performed to improve the cleaning performance, and in the latter half of the water supply period. Can shorten the water supply time by supplying tap water alone by the second route.

  Moreover, in this embodiment, the washing machine 1 increases the water supply by the 2nd path | route which does not go through the UFB generator 13, so that there is much quantity of water required for washing. Thereby, it can prevent that water supply time becomes long too much. In addition, when the amount of the laundry 20 is small, the usability is not greatly impaired even if only the water supply by UFB water is used, and the cleaning ability can be greatly improved.

  By the way, when the detergent is effectively infiltrated into the laundry 20, it is conceivable that the UFB water is supplied to the detergent case 11 as in the present embodiment, and then supplied to the laundry dewatering tank 4 as a cleaning liquid. It is also conceivable that water is supplied through a flow path that does not pass through the UFB generator 13, and the UFB water is supplied in a state where the bulk of the laundry 20 is reduced, that is, the laundry 20 is gathered. This is because the laundry 20 having a reduced bulk is in a state where clothes are gathered together, so that it is considered that the UFB water can be quickly infiltrated.

  Therefore, for example, as in water supply example IV shown in FIG. 7, tap water alone may be supplied at the beginning of the water supply period to reduce the bulk of the laundry 20, and then UFB water alone may be supplied.

  Moreover, the magnitude | size and position of the water supply range (R1. Refer FIG. 2) in the washing | cleaning dewatering tank 4 can be changed by changing the mixing ratio of UFB water and tap water. That is, the shape of the water discharged from the supply port 12 can be changed.

  In the case of UFB water supply alone, the water supply range (R1) is relatively close to the supply port 12, as shown in FIG. On the other hand, in the case of tap water supply alone, the water supply range (R1) is at a position relatively separated from the supply port 12, as shown in FIG. In addition, in the case of mixed water supply, as shown in FIG. 6 (C), the position is between the UFB water single water supply and the tap water single water supply. The size can be changed from the position of the UFB water supply alone to the position of the tap water supply alone. That is, the water supply valves 16, 17 change the momentum of the water supplied from the supply port 12, whereby the position of the water supply range (see R <b> 1) where the water supplied from the supply port 12 falls down is a plan view of the laundry dewatering tub 4. Functions as an adjustment section that can be adjusted stepwise from the outside in the radial direction to the center.

  Therefore, the flow rate of the water supplied from the supply port 12 is changed while changing the mixing ratio of the UFB water and the tap water, that is, adjusting the water supply amount from the first route and the water supply amount from the second route. By rotating the laundry dewatering tub 4 while allowing the water to penetrate into the entire laundry 20 more effectively.

  In this case, when supplying UFB water alone that supplies water via the UFB generator 13 or when supplying mixed water with a relatively high mixing ratio of UFB water, and when supplying tap water that supplies water that does not pass through the UFB generator 13 Or you may make it change a rotation speed at the time of mixing water supply with a comparatively low mixing ratio of UFB water. Further, the washing / dehydrating tub 4 may be stopped at the time of supplying UFB water alone or at the time of mixed water supply with a relatively high mixing ratio of UFB water. This is because water is less likely to be repelled even if the number of revolutions is increased if the tap water is supplied alone or mixed water is supplied with a relatively low mixing ratio of UFB water.

(Fourth embodiment)
Hereinafter, the fourth embodiment will be described with reference to FIG. In addition, the structure of the washing machine 1 is common to 1st Embodiment.

  When the laundry dewatering tub 4 is rotated during the water supply period, the laundry 20 can be more effectively infiltrated by appropriately controlling the rotation speed. As described above, in the case of passing through the UFB generator 13, the flow rate is reduced. At this time, if the laundry dewatering tub 4 is rotated at a high speed of about 400 rpm to 1000 rpm, such as the number of rotations during the dewatering process, water with a small flow rate is repelled when touching the laundry 20 and most of the water is washed. There is a risk that the outer peripheral side of the dewatering tub 4 may be approached, or the water may flow out of the hole provided in the laundry dewatering tub 4 into the water tub 3 and not penetrate into the laundry 20. Moreover, it becomes difficult to permeate the stored UFB water into the laundry 20.

  Therefore, the washing machine 1 does not rotate at a rotational speed as high as the rotational speed of the dehydration process, but rotates at a low speed of, for example, about 20 rpm, so that even if the UFB water has a small flow rate, as shown in FIG. In addition, UFB water can be effectively infiltrated into the laundry 20 and the cleaning ability can be improved.

  At this time, when supplying the UFB water, the rotation speed of the washing / dehydrating tub 4 may be lowered as compared with the case of supplying tap water. For example, according to the state of the water supply valve 16 and the water supply valve 17, as described above, in the case of UFB water supply alone, 20 rpm, in the case of mixed supply, 30 rpm, and in the case of tap water supply alone, 40 rpm, That is, you may change the rotation speed of the washing dehydration tank 4 according to the kind of water to supply. This is because if the momentum of the water supplied from the supply port 12 increases, the possibility of being repelled even if the rotational speed is increased is reduced, and the laundry 20 can be infiltrated with water. In addition, since the water is collected relatively quickly in the case of supplying tap water alone, the laundry 20 can move more quickly than in the case of supplying UFB water alone, so that the laundry 20 can move more quickly so that the water can penetrate more into the laundry 20. It can also be expected to become easier.

  Further, when the washing machine 1 rotates the laundry dewatering tub 4 at a constant speed during the water supply period, the rotational speed at which the centrifugal force applied to the laundry 20 is equal to or higher than the gravitational acceleration of the earth, although the rotational speed is lower than the dewatering stroke. For example, the rotation may be performed at about 100 rpm to 200 rpm. This is because when the centrifugal force applied to the laundry 20 is less than the gravitational acceleration of the earth, the laundry 20 spreads in the laundry dewatering tub 4 as shown in FIG. 8A, and is outside the water supply range (R2). If the centrifugal force applied to the laundry 20 is greater than or equal to the gravitational acceleration of the earth, the laundry 20 is on the inner peripheral wall side of the laundry dewatering tub 4 as shown in FIG. This is because the laundry 20 comes to be located within the water supply range (R2) as a whole, and can directly touch the supplied water.

  The UFB water can be efficiently permeated into the laundry 20 by such a rotational speed. In this case, as described above, at the time of supplying UFB water alone or at the time of mixing water supply with a relatively high mixing ratio of UFB water, and at the time of supplying tap water alone for supplying water not via the UFB generator 13, or relatively at the time of supplying UFB water. You may make it change rotation speed by the time of mixing water supply with a low mixing ratio, ie, according to the difference in a water supply position.

(Other embodiments)
In the embodiment, the washing machine 1 having no drying function is illustrated, but the present invention can also be applied to a washing machine having a drying function.

  In the embodiment, an example in which the position of the water supply range (R1) can be changed by changing the momentum of the water supplied from the supply port 12 has been shown. For example, as shown in FIG. May be formed so as to extend in the radial direction in a plan view of the washing / dehydrating tub 4 to be a water supply range (R3) extending in the radial direction. In this case, for example, by providing a plurality of openings in the supply port 12 as shown in FIG. 9B, a water supply range (R3) extending in the radial direction can be formed. Alternatively, the water supply range (R3) extending in the radial direction may be formed by making the supply port 12 movable or extendable in the radial direction in a plan view of the washing / dehydrating tank 4.

  When the water level detected by the water level detection unit such as the water level sensor 19 reaches the preset first water level during the water supply period, the washing machine 1 stops the rotation of the washing and dewatering tank 4 while the stirring blade 5 You may rotate independently. The first water level may be set based on, for example, a ratio with respect to the target water level, a ratio with respect to the capacity of the washing / dehydrating tub 4, and the like. Needless to say, the first water level <the target water level.

  As described above, the laundry 20 made of a silk material or 100% synthetic fiber is difficult to absorb moisture and repels water, so that water is supplied while the laundry dewatering tank 4 is rotated (tank rotation water supply). However, in some cases, it may be difficult to infiltrate the UFB water. On the other hand, if water is stored in the washing / dehydrating tub 4 to some extent, for example, about 1/4 of the washing / dehydrating tub 4, by rotating the well 5 with stirring, the water flow generated by the rotation and the stirring blade 5 It is possible to draw the laundry 20 in the laundry dewatering tub 4 into the water or change the vertical position of the laundry 20 by the mechanical force of the machine itself.

  Therefore, a predetermined first water level is set, and when the first water level is reached, the control is performed to rotate the stirring blade 5 to effectively infiltrate the UFB water into the laundry 20 in the laundry dewatering tub 4. Can do.

  Moreover, although the 1st path | route and the 2nd path | route both illustrated the structure which passes along the detergent case 11 in embodiment, it is not limited to this. For example, the UFB water passes through the detergent case 11 but the second path does not pass through the detergent case 11, the UFB water does not pass through the detergent case 11, and the second path passes through the detergent case 11, or A configuration that passes through the detergent case 11 but does not come into contact with the detergent may be used. Further, in such a configuration, it is not necessary that the period for supplying the UFB water is the first half of the above-described water supply period, and water that does not pass through the UFB generator 13 as in the water supply example 4 in FIG. The water supply of UFB water may be started in a state where the bulk of the laundry 20 is reduced. Of course, even in such a configuration, the supply range can be adjusted by changing the momentum of the water by allowing the mixed supply by using one supply port 12.

  The mixing ratio of UFB water and tap water may be switched continuously or stepwise. For example, UFB water alone may be supplied at the beginning of the water supply period, and the proportion of tap water may be gradually increased after a predetermined time has elapsed.

  You may switch the mixing ratio of UFB water and tap water according to the driving course which the user selected. For example, if you can set a standard course for standard washing operation, a firm course for removing dirt firmly, a speedy course for washing quickly, etc., in order to remove dirt firmly, Even if the water supply time becomes long, it is desirable to supply a large amount of UFB water. In other words, since it is considered that the user's desire is to remove dirt rather than the length of washing time, in such a case, it is better to supply a large amount of UFB water.

  Even if UFB water alone is supplied at the beginning of the water supply period, for example, tap water alone is supplied until 90% of the target water level is reached, and then UFB water alone is supplied again until the target water level is reached. Good. As a result, UFB water can be supplied in a state where water has accumulated to some extent, that is, in a state where the laundry 20 is easily moved, and contact between the fine bubbles 13b and the laundry 20 can be promoted.

  In the embodiment, the water supply period when starting the washing operation has been described, but when supplying water in the rinsing process after the washing process, any of UFB single water supply, mixed water supply, tap water single water supply, or any of them You may supply water in combination. Thereby, it becomes possible to accelerate | stimulate melt | dissolution of the detergent which remained in the laundry 20, and the improvement of the finishing quality when a washing operation is complete | finished can be anticipated. Moreover, you may provide the softening agent case which accommodates a softening agent in the path | route through which UFB water flows, for example in the water supply path | route 9, for example. Thereby, the solubility of a softening agent increases with UFB water, and the improvement of finishing quality can be expected.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  In the drawings, 1 is a washing machine, 2 is a main body, 3 is a water tank, 4 is a rinsing dehydration tank, 5 is a stirring blade, 7 is a control unit, 9 is a water supply path, 11 is a detergent case, 12 is a supply port, and 13 is a UFB. A generator (fine-bubble-containing part), 13b is a fine bubble, 16 and 17 are water supply valves, and 20 and 20a are laundry.

Claims (12)

The body,
A water tank provided in the main body;
A laundry dewatering tank that is rotatably provided in the water tank and into which laundry is put,
A fine bubble-containing part that contains fine bubbles in water supplied to the washing and dewatering tank;
A controller that controls rotation of the washing and dewatering tank and supply of water to the washing and dewatering tank, and
The control unit rotates the washing / dehydrating tub during a water supply period in which water is supplied to the washing / dehydrating tub.   The control unit sets a decelerating period for decelerating the rotation of the washing / dehydrating tub or a stopping period for stopping the rotation of the washing / dehydrating tub during the water supply period, and intermittently sets the washing / dehydrating tub during the water supply period. The washing machine according to claim 1, wherein the washing machine is operated. The washing machine can perform at least a washing process, a rinsing process, and a dehydrating process,
The said control part makes the rotational speed at the time of rotating the said wash dehydration tank in the said water supply period lower than the rotational speed at the time of rotating the said wash dehydration tank in the said dehydration process. 2. The washing machine according to 2.   The supply port for supplying water into the washing / dehydrating tub is provided so as to be located radially outside the rotation center of the washing / dehydrating tub. Washing machine.   5. The control unit according to claim 1, wherein when the laundry dewatering tub is rotated during the water supply period, the control unit rotates the centrifugal force applied to the laundry at a rotation speed that is equal to or higher than a gravitational acceleration of the earth. The washing machine according to one item. The path of water supplied from the supply port is a path that passes through either the first path side that passes through the fine bubble-containing part or the second path side that does not pass through the fine bubble-containing part, or the first A water supply valve that switches to a path that passes through both the path side and the second path side;
In the water supply period, the control unit supplies water to the washing and dewatering tub while switching the water path flowing through the water supply path or in a state where the water path flowing through the water supply path is fixed. The washing machine according to any one of claims 1 to 5, wherein the washing machine is characterized in that: A stirring blade provided in the laundry dewatering tub, rotating integrally with the laundry dewatering tub, and capable of independent rotation independent of the laundry dewatering tub;
A water level detection unit that detects the water level of the supplied water directly or indirectly based on the time of supplying water;
When the water level detected by the water level detection unit reaches a preset first water level during the water supply period, the control unit stops the rotation of the washing and dewatering tank and rotates the stirring blade independently. The washing machine according to any one of claims 1 to 6, wherein   A detergent case is provided on the downstream side of the fine bubble-containing part in the water supply path, and contains a detergent supplied from the supply port into the laundry dewatering tub together with water containing fine bubbles. Item 8. The washing machine according to any one of Items 1 to 7.   The washing machine according to any one of claims 1 to 8, wherein the control unit supplies water via the fine bubble-containing unit at an initial stage of the water supply period.   The control unit supplies water that does not pass through the fine bubble-containing unit for a predetermined period in the initial stage of the water supply period, and then starts supplying water through the fine bubble-containing unit. The washing machine according to any one of claims 1 to 9.   In the water supply period, the control unit changes a flow rate of water to be supplied by changing a mixing ratio of water passing through the fine bubble-containing unit and water not passing through the fine bubble-containing unit. The washing machine according to any one of claims 1 to 10.   The control unit, when supplying water via the fine bubble-containing part, lowers the number of rotations of the washing and dewatering tub than when supplying water not via the fine bubble-containing part. The washing machine according to any one of 1 to 11.

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