JP6666666B2 - Washing machine - Google Patents

Description

  The present invention relates to a washing machine.

  2. Description of the Related Art Conventionally, there has been provided a washing machine having a pre-washing function of removing dirt to some extent without using a detergent before performing a main wash using a detergent on a heavily soiled laundry.

  For example, in the drum-type washing machine of Patent Document 1, water is supplied to the water receiving tank through a first water supply path that supplies water to the water receiving tank without passing through the detergent accommodating section, and pre-washing is performed. In addition, control is performed to drain or supply a part of the washing water while rotating the rotating drum.

JP-A-2015-6278

  In the drum type washing machine of Patent Document 1, the following prewashing is performed. That is, after the water is stored in the water receiving tank via the first water supply path, a stirring operation for rotating the rotary drum is performed, and when the water level detection unit detects that the water level has reached the predetermined level, the pre-washing is started. . At this time, the circulation pump is operated intermittently, water is supplied via the first water supply path, and water is supplied to a predetermined water level. After the replenishment of water is completed, while the rotating drum is being rotated, the drain valve is opened to discharge a small amount of washing water in the water receiving tank, and a new water is supplied to the water receiving tank to a predetermined water level through the first water supply path. I do. By repeating such a small amount of drainage and new water supply a predetermined number of times, the pre-washing step is completed.

  In the drum type washing machine of Patent Document 1, since pre-washing is performed in a state in which water is stored in a water receiving tub to a predetermined water level, dirt dissolved in the wash water by pre-washing causes laundry to be washed during pre-washing. May be re-adhered to the surface to cause darkening.

  Therefore, a technical problem to be solved by the present invention is to provide a washing machine in which dirt dissolved in washing water by pre-washing does not easily adhere to laundry during pre-washing.

  In order to solve the above technical problems, according to the present invention, the following washing machine is provided.

That is, the washing machine according to the present invention
Outer box,
A water tank arranged in the outer box,
A rotating tub rotatably arranged in the water tub and containing laundry;
A driving device that rotationally drives the rotary tank,
A water supply nozzle for injecting a water flow toward the laundry stored in the rotating tub,
A water supply valve for controlling water supply to the water supply nozzle,
A control device that controls the driving device and the water supply valve to execute a pre-washing course including a pre-washing step and a dehydration step before main washing,
A circulation pump that circulates washing water drained from the water tank back into the water tank;
A drain valve for discharging the water in the water tank out of the outer box ,
The control device controls the driving device and the water supply valve to perform the injection of the water flow and the rotation of the rotary tub, thereby pre-washing the dirt attached to the laundry with the water flow. While executing, in the pre-washing course, the circulation pump is controlled not to operate and the laundry is controlled not to be submerged , the drain valve is closed during the pre- washing step, and the The drain valve is opened .
Further, a water tank water supply path that communicates with a storage case that stores the laundry treatment agent and supplies water from the storage case into the water tank,
A shower water supply path for supplying water into the water tank without passing through the storage case,
It is preferable that the water supply nozzle is provided in the shower water supply path.
Further, the washing machine according to the present invention includes:
Outer box,
A water tank arranged in the outer box,
A rotating tub rotatably arranged in the water tub and containing laundry;
A driving device that rotationally drives the rotary tank,
A water supply nozzle for injecting a water flow toward the laundry stored in the rotating tub,
A water supply valve for controlling water supply to the water supply nozzle,
A control device that controls the driving device and the water supply valve to execute a pre-wash course including a pre-wash step and a dehydration step before the main wash course,
A circulation pump that circulates washing water drained from the water tank back into the water tank;
A water tank water supply path that communicates with a storage case that stores the laundry treatment agent and supplies water from the storage case into the water tank;
A shower water supply path for supplying water into the water tank without passing through the storage case,
The water supply nozzle is provided in the shower water supply path,
The control device controls the driving device and the water supply valve to inject the water flow and rotate the rotating tub, thereby pre-washing the dirt attached to the laundry with the water flow. And performing control such that the circulation pump is not operated and the laundry is not submerged in the pre-washing course.

  It is preferable that the water flow injected from the water supply nozzle is a granular swirling flow.

Whether or not the user has operated the washing machine, or a use state determination unit that determines whether or not the washing machine is in use by the presence or absence of the user in the vicinity of the washing machine,
And a notifying unit for notifying a message,
It is preferable that the control device controls the notifying unit to notify a message regarding the pre-washing course when the use state determining unit determines that the washing machine is in the use state.

A cloth amount detection unit that detects a cloth amount that is an amount of the laundry;
A calculating unit that calculates a main wash estimated cloth amount based on the cloth amount detected by the cloth amount detection unit,
Wherein the control device controls the driving device and the water supply valve to execute said prewashing have courses, and the main washing course to be performed following the該予washing course,
The calculation unit subtracts a predetermined water content as the water content by the pre-wash from the cloth amount before the main wash detected by the cloth amount detection unit before the execution of the main wash course, It is preferable to calculate the estimated washing amount.

A cloth amount detection unit that detects a cloth amount that is an amount of the laundry;
A calculating unit for calculating a pre-wash water content and a main wash estimated cloth amount based on the cloth amount detected by the cloth amount detection unit,
Wherein the control device controls the driving device and the water supply valve to execute said prewashing have courses, and the main washing course to be performed following the該予washing course,
The calculation unit calculates the pre-wash water content based on the pre-wash amount detected by the cloth amount detection unit before the execution of the pre-wash course, and calculates the cloth amount before the execution of the main wash course. It is preferable that the pre-wash water content is subtracted from the amount of cloth before main washing detected by the detection unit to calculate the estimated amount of cloth for main washing.

  In the pre-washing course according to the present invention, the washing water is sprayed onto the laundry 7 accommodated in the rotating tub 4 without using the circulating water containing dirt, and the washing water is washed. Dirt adhering to the object 7 can be pre-washed with clean water. Therefore, the dirt adhering to the laundry 7 can be removed in advance by the strong detergency of the water flow S jetted from the water supply nozzle, and the dirt dissolved in the washing water by the pre-washing is reapplied to the laundry 7 during the pre-washing. It becomes difficult to adhere. Further, the operation time of the pre-wash can be reduced.

1 is an external perspective view of a drum type washing machine according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view schematically illustrating the configuration of the washing machine illustrated in FIG. The external appearance perspective view of a water supply nozzle. FIG. 4 is an exploded perspective view of the water supply nozzle shown in FIG. 3. Sectional drawing of the water supply nozzle shown in FIG. The block diagram of the washing machine shown in FIG. FIG. 4 is a sequence diagram of a pre-wash course according to the first embodiment. 9 is a flowchart illustrating a processing procedure after the end of a pre-wash course according to the second embodiment. 9 is a flowchart showing a first embodiment of the processing procedure after the end of the pre-wash course shown in FIG. 9 is a flowchart showing a second embodiment of the processing procedure after the end of the pre-wash course shown in FIG. 9 is a flowchart showing a third embodiment of the processing procedure after the end of the pre-wash course shown in FIG. 13 is a flowchart showing a fourth example of the processing procedure after the end of the pre-wash course according to the third embodiment. 16 is a flowchart showing a fifth example of the processing procedure after the end of the pre-wash course according to the third embodiment. 16 is a flowchart illustrating a sixth example of the processing procedure of the cloth amount detection operation according to the fourth embodiment. 17 is a flowchart showing a seventh example of the processing procedure of the cloth amount detection operation according to the fourth embodiment.

  Hereinafter, a configuration of the drum type washing machine 1 (hereinafter, simply referred to as a washing machine 1) according to the first embodiment will be described with reference to FIGS. 1 to 6. This embodiment is merely an example, and is not limited to the embodiment.

  FIG. 1 is an external perspective view of the washing machine 1 as viewed obliquely from above, and FIG. 6 is a block diagram of the washing machine 1 shown in FIG. First, the overall configuration of the washing machine 1 will be described with reference to FIGS. Hereinafter, for convenience of description, in FIG. 1 and the like, the side on which the door 3 is provided is defined as the front side (front), and the direction of the washing machine 1 is specified with reference to FIG.

  As shown in FIG. 1, the washing machine 1 includes an outer box 1a having an outer box opening 2 on the front surface.

  The outer box opening 2 is opened and closed by a door 3 rotatably attached to the outer box 1a by a hinge. Part of the door 3 is made of a transparent member such as glass so that the inside of the drum 4 (see FIG. 2) can be visually recognized.

  In addition, a setting display section 5 is provided on the upper front surface of the outer box 1a. The setting display section 5 is selected by a power on / off key, a plurality of selection keys 5a (for example, a washing course selection key and a start key, etc.) for selecting and determining the operation content, and the selection key 5a. It has a display unit and the like for displaying the determined operation details. By operating the selection key 5a provided on the setting display section 5, a desired washing course is selected and set from the washing courses including the pre-washing course and the main washing course. Therefore, the selection key 5a of the setting display section 5 functions as the setting section 5a. By operating the selection key 5a of the setting display section 5, the washing machine 1 executes a pre-washing course (a pre-washing step and a dehydration step), a main washing course (a main washing step, a rinsing step, a dehydration step, and the like) and the like. I do. Since the pre-washing course is a course for the purpose of preliminary washing, it is assumed that the main washing course using a detergent is performed after the pre-washing course is completed.

  FIG. 2 is a sectional view taken along the line AA in FIG. As shown in FIG. 2, the washing machine 1 includes a water tub 6 disposed in an outer box 1a, and a drum (rotating tub) 4 rotatably disposed in the water tub 6 and containing laundry 7 such as clothes. A housing case 8 provided in the outer box 1a for housing the laundry treatment agent, a housing case water supply path 9, a water tank water supply path 10, and a shower water supply path 11. Here, the above-mentioned laundry treatment agent is for laundering the laundry 7 and is specifically a detergent (liquid detergent and powder detergent), a softener, a bleaching agent, and the like.

  The storage case water supply path 9 is a water path for supplying water to the storage case 8 from a water supply unit 12 provided at the rear of the top surface of the outer box 1a. A first water supply valve 13 for opening and closing the storage case water supply path 9 is provided in the storage case water supply path 9. The water tank water supply path 10 is a water path for supplying the laundry treatment agent solution from the storage case 8 into the water tank 6. The shower water supply path 11 is a water path for supplying water from the water supply unit 12 to the shower nozzle (water supply nozzle) 25. A second water supply valve (water supply valve) 14 that opens and closes the shower water supply path 11 is provided in the middle of the shower water supply path 11. The second water supply valve 14 is an example of the shower water supply valve.

  A water tank opening 15 is provided at the front of the water tank 6 so as to face the outer box opening 2. The water tank 6 has a cylindrical shape with a bottom, and is arranged laterally so that the water tank opening 15 faces the outer box opening 2. In this case, an axis passing through the center of gravity of the water tank 6 is inclined so as to have an angle of 5 ° to 30 ° with respect to the horizontal direction. The water tank 6 is elastically supported by a suspension 16 provided below the rear (bottom) of the water tank 6. Further, a main motor 17 as an example of a driving device is attached to a rear surface (bottom outer surface) of the water tank 6, and the drum 4 is driven to rotate by the main motor 17.

  The drum 4 has a bottomed cylindrical shape, and is inclined so that the bottom (that is, the rear) is lower than the front. That is, the rotation axis of the drum 4 is parallel to the axis passing through the center of gravity of the water tank 6. Therefore, the rotation axis of the drum 4 is inclined so as to have an angle of 5 ° to 30 ° with respect to the horizontal direction. In addition, a drum opening 18 that opens to face the water tank opening 15 is provided on the front surface of the drum 4. A plurality of through holes 19 (only six are shown in FIG. 2 as a representative) are provided in the entire peripheral wall of the drum 4.

  The through-hole 19 is a hole for flowing a washing agent solution, water and air between the space between the water tub 6 and the drum 4 and the space in the drum 4. For example, the washing agent solution supplied into the water tub 6 enters the drum 4 through the through hole 19.

  A packing 20 made of an elastic material such as rubber or soft resin is fixed to the water tank opening 15. Therefore, when the door 3 is closed, the door 3 comes into close contact with the packing 20, so that the liquid in the water tank 6 can be prevented from leaking out of the water tank 6.

  The packing 20 connects the edge of the outer box opening 2 of the outer box 1a to the edge of the water tank opening 15 of the water tank 6, and the laundry 7 can pass through the space inside the packing 20. . That is, the packing 20 forms an access path for taking the laundry 7 in and out. Further, a bellows or the like is provided on the packing 20, which bends in accordance with the swing of the water tank 6 and can follow the movement of the water tank 6.

  The storage case 8 is arranged so as to be located inside the front part of the top surface of the outer box 1 a and above the front part of the water tank 6. The housing case 8 includes a main body 21 having an opening facing the top surface of the outer box 1a, and a lid 22 forming a part of the outer box 1a and covering the opening of the main body 21 so as to be openable and closable. And it is comprised.

  The storage case water supply path 9 includes a first path 23 and a second path 24. The first water supply valve 13 that opens and closes the first path 23 and the second path 24 is provided at a branch position of the second path 24 from the first path 23. The first water supply valve 13 can open only one of the first path 23 and the second path 24. Further, the first water supply valve 13 can simultaneously open and close both the first path 23 and the second path 24.

  A water supply port 12 a provided at the bottom of the water supply section 12 is connected to one end of the storage case water supply path 9 on the first water supply valve 13 side. Specifically, tap water is supplied to the water supply unit 12 from a tap (not shown). On the other hand, the other end of the storage case water supply path 9, that is, the end of the first path 23 is stored in a detergent storage chamber (not shown) of the main body 21 of the storage case 8. The case 8 communicates with a softener accommodating chamber (not shown) in the main body 21.

  One end of the water tank water supply path 10 communicates with the inside of the main body 21 of the storage case 8, while the other end communicates with the upper part of the water tank 6.

  One end of the shower water supply path 11 communicates with the water supply port 12a of the water supply unit 12 via the second water supply valve 14, while a shower nozzle (water supply nozzle) 25 is provided at the other end. The shower nozzle 25 is attached to the upper edge of the water tank opening 15 such that the tip end faces the drum opening 18. The shower nozzle 25 is configured to inject the granular swirling flow S obliquely downward as a water flow S in a shower shape, that is, to inject the droplet shower flow S. For example, in a pre-washing step of a pre-washing course or a rinsing step in a main washing course, the droplet shower flow S is introduced into the drum 4 from the drum opening 18 and is sprayed on the laundry 7. .

  A drain port 26 for draining washing water and the like in the water tank 6 to the outside is provided at a lower portion of the water tank 6, and an upper end of a drain duct 27 is connected to the drain port 26. After passing through the filter case 28, the washing water in the drain duct 27 is discharged to the outside of the outer box 1a through the drain hose 29.

  A drain valve 30 that is opened and closed by a drain motor 31 is provided at an end of the drain hose 29 on the filter case 28 side. The drainage motor 31 is controlled by the control device 41 as described later in detail, and the control device 41 controls opening and closing of the drainage valve 30. When the drain valve 30 is open, the washing water in the water tub 6 passes through the drain case 27, passes through the filter case 28, and then is discharged through the drain hose 29 to the outside of the outer box 1a. .

  A lint filter 32 made of resin or metal is housed in the filter case 28. The lint filter 32 removes foreign matter such as lint from the washing water passing through the inside of the filter case 28.

  An air trap 33 is provided integrally with the filter case 28. The space in the filter case 28 communicates with the space in the air trap 33 so that a part of the water that has entered the filter case 28 enters the air trap 33. One end of a pressure guiding pipe 34 is connected to the air trap 33, and a water level sensor 42 (see FIG. 6) is connected to the other end of the pressure guiding pipe 34. The water level sensor 42 detects a water level in the water tank 6.

  The water level sensor 42 has a coil and a magnetic material inside, and the magnetic material moves in the coil according to a change in the air pressure in the air trap 33. Thus, the water level sensor 42 detects the water level in the water tank 6 based on the oscillation frequency by detecting the inductance of the coil generated by the position of the magnetic body in the coil as the oscillation frequency. Here, the position of the water level sensor 42 is higher than the position of the drain port 26 in the water tank 6.

  The method of detecting the water level by the water level sensor 42 is not limited to the above-described method using the air trap 33 and the pressure guiding pipe 34.

  Further, the washing machine 1 can have a drying function or the like, but since it has nothing to do with the gist of the present invention, the description of the configuration and operation thereof will be omitted.

  Hereinafter, the formation of the droplet shower flow S, which is one feature of the present invention, will be described with reference to FIGS.

  FIG. 3 is an external perspective view of the shower nozzle (water supply nozzle) 25, FIG. 4 is an exploded perspective view of the shower nozzle 25, and FIG. 5 is a cross-sectional view of the shower nozzle 25. As shown in FIGS. 3 to 5, the shower nozzle 25 is mounted inside the nozzle body 37, a nozzle joint 36 for connecting to the shower water supply path 11, a nozzle body 37 connected to the nozzle joint 36. 4 and 5, and a cap 39.

  The nozzle joint 36 has a connection fitting 36 a for attaching and fixing to the upper edge portion or the like of the water tank opening 15 in the water tank 6. Further, a throttle portion 36b (see FIG. 5) for increasing the flow velocity of the water flow is provided inside. In addition, the nozzle body 37 has a connection fitting 37a connected to the connection fitting 36a of the nozzle joint 36, and has a function of rectifying the water flow from the nozzle joint 36. Furthermore, the tip 37b of the nozzle body 37 faces the drum opening 18 side, and a whirler 38 is mounted inside the tip 37b.

The whirler (swirler) 38 has a V-shaped swirl groove 38b along an obliquely arranged elliptical plate 38a, swirls the supplied water flow to create a swirl flow, and generates a swirl flow. Water is cut by shearing force or the like to form droplets. The cap 39 is connected to the tip end 37b of the nozzle body 37, has a small opening area (for example, 7.1 mm ² ), narrows the flow path by an injection port 39a, and is formed by a whirler (swirler) 38. The droplet is further cut by a shear force or the like to form a small-diameter droplet having a particle size of 2 mm or less. For example, the particle size of the droplet in the droplet shower flow S is 100 to 500 μm.

  The shower nozzle 25 makes it possible to diffuse and jet the droplet shower flow S, which is an aggregate of droplets having a small particle diameter, at a high pressure while swirling. That is, it is possible to use a swirler using tap water pressure to jet water to clothes over a wide range with the same tap water pressure. The droplet shower flow S ejected from the shower nozzle 25 has a large kinetic energy because the flow velocity is increased by passing through the throttle portion 36b in addition to having the tap water pressure. . In the pre-wash course, the droplet shower stream S having a large kinetic energy is hit against the laundry 7 so that dirt attached to the laundry 7 can be washed off very effectively. That is, the droplet shower flow S has a strong detergency despite the small amount of water.

  In the present embodiment, the shower nozzle 25 that is the water supply nozzle 25 that injects the high-pressure water flow S is configured to inject the granular swirling flow S in a shower shape, but is not limited thereto. Absent. The shower nozzle 25 is provided with a water stream S having a high pressure such that the droplet shower stream S having a large kinetic energy is slammed against the laundry 7 so that dirt attached to the laundry 7 is washed off very effectively. What is necessary is just what injects. The water flow S jetted from the shower nozzle 25 may be not only a swirling flow but also a linear water flow jetted linearly by increasing the flow velocity by passing through the throttle portion 36b. At this time, the number of the water flows S jetted linearly from the shower nozzle 25 may be singular or plural. Further, if the pressure of the water flow S injected from the shower nozzle 25 is high, a continuous water flow in which water flows continuously instead of a droplet water flow in which small droplets intermittently flow may be used.

  FIG. 6 is a control block diagram relating to a pre-wash course (pre-wash step, dehydration step) and a main wash course (main wash step, rinsing step, and dehydration step) in the washing machine 1. The washing machine 1 includes a control device 41 including a CPU (Central Processing Unit) and an input / output circuit in an electrical component unit (not shown) and the like. The CPU of the control device 41 reads and executes a control program and the like stored in the storage unit 56 to perform various arithmetic processes and control processes related to the washing operation.

  The storage unit 56 is configured by a nonvolatile data rewritable memory element such as a RAM (Random Access Memory) or an EEPROM (Electrically Erasable Programmable Read Only Memory) or a flash memory, and is executed by the CPU of the control device 41. A control program to be executed and various data necessary for this are stored.

  The control device 41 is connected to a setting display section 5, a water level sensor 42, a rotation speed sensor 43, a voltage sensor 44, and a door switch 45. The control device 41 can acquire detection signals from the setting display unit 5, the water level sensor 42, the rotation speed sensor 43, the voltage sensor 44, and the door switch 45.

  Note that the voltage sensor 44 detects the voltage of the main motor 17 for driving the drum. The door switch 45 detects whether the door 3 is open or closed. The rotation speed sensor 43 detects the rotation speed of the drum 4.

  Further, the first water supply valve 13, the second water supply valve (water supply valve, shower water supply valve) 14, the drainage motor 31, the circulation pump 35, and the inverter 47 are connected to the control device 41 via a load drive circuit 46. ing. The main motor 17 is connected to the inverter 47. The CPU of the control device 41 performs, for example, rotation control of the main motor 17 and opening / closing control of the first water supply valve 13 and the second water supply valve (water supply valve, shower water supply valve) 14.

  The notification unit 57 is connected to the control device 41. The notification unit 57 includes, for example, a speaker when the notification information such as a message is uttered by voice, and outputs the notification information as characters, pictures, figures, or the like, a light emitting diode (LED) or a liquid crystal display (LCD). It consists of. The CPU of the control device 41 performs processing such as reception of operations and lighting control on the setting display unit 5, output of notification information to the notification unit 57, reading of information stored in the storage unit 56, and writing of information to the storage unit 56. I do. The notification condition and the notification information are stored in the storage unit 56 in association with each other in advance.

  The control device 41 performs calculations and judgments based on detection signals from the setting display unit 5, the water level sensor 42, the rotation speed sensor 43, the voltage sensor 44, and the door switch 45, and controls the setting display unit 5 and the load drive circuit 46. Control. Further, the load drive circuit 46 drives the first water supply valve 13, the second water supply valve 14, the drainage motor 31, the circulation pump 35, and the inverter 47. Then, the rotation speed of the main motor 17 for driving the drum is controlled by the inverter 47. Thus, under the control of the control device 41, each step in the pre-wash course and the main wash course is executed. The circulation pump 35 circulates the washing water drained from the water tank 6 back into the water tank 6.

  According to the washing machine 1 having the above-described configuration, the shower nozzle 25 is capable of diffusing and ejecting the droplet shower flow S, which is an aggregate of droplets having a smaller particle diameter than before, while turning the droplet shower flow S. Therefore, the droplet shower flow S diffused and jetted from the shower nozzle 25 is easy to wash dirt attached to the laundry 7 and is diffused widely. Therefore, in the pre-wash course in this embodiment, the pre-wash step is performed by spraying the droplet shower stream S onto the laundry 7 stored in the rotating drum 4.

  The CPU of the control device 41 includes a main wash control unit 48, a pre-wash control unit 49, a cloth amount detection unit 50, a use state determination unit 51, a setting determination unit 52, a time measurement unit 53, an elapsed time determination unit 54, and a calculation unit 55. Can function as The calculation unit 55 calculates the pre-wash water content Wp and the estimated main wash amount Qe based on the amount of the cloth detected by the cloth amount detection unit 50, as described later.

  Hereinafter, the operation of the pre-wash course executed by the pre-wash control unit 49 in the control device 41 will be described.

(1st Embodiment)
FIG. 7 shows a sequence diagram of a prewash course according to the first embodiment, which is executed by the prewash control unit 49.

  In the sequence diagram of FIG. 7, from above, the rotation speed of the drum 4 detected by the rotation speed sensor 43 (that is, the rotation speed of the main motor 17), the on / off of the drain valve 30 opened and closed by the drain motor 31, and the shower The ON / OFF of the second water supply valve 14 for supplying water to the nozzle 25 and the ON / OFF of the circulation pump 35 are shown. Note that the pre-washing course is a course in which dirt such as mud stains and food spills adhered to the laundry 7 is preliminarily washed off. Therefore, a total of about 5 minutes including the pre-washing step and the dewatering step is a short course. It is.

  As shown in FIG. 7, when the pre-washing course is started by the pre-washing control unit 49, the second water supply valve 14 is turned on (open), the drain valve 30 is turned off (closed), and the droplet shower flow S Is sprayed to perform a shower cleaning operation. By spraying the droplet shower stream S made of fresh and clean tap water onto the laundry 7, dirt attached to the laundry 7 can be washed away.

  Simultaneously with the ejection of the droplet shower flow S, the main motor 17 is driven to rotate, and the rotation of the drum 4 starts. The rotation speed of the drum 4 is controlled by the control device 41. For example, control is performed so that tumbling is performed at about 50 rpm by repeating, for example, left rotation 5 seconds, stop 4 seconds, right rotation 5 seconds, and stop 4 seconds. When the drum 4 rotates at a rotation speed of about 50 rpm, the laundry 7 lifted by the rotation of the drum 4 falls under its own weight. The dirt attached to the laundry 7 can be floated by the impact when the laundry 7 falls under its own weight. By the shower washing operation, the water level in the water tub 6 gradually rises, and the state of the falling of the laundry 7 changes with time. However, since the shower cleaning operation is completed in a short time (for example, about 1 minute), the water generated by the droplet shower flow S only slightly accumulates in the water tub 6, which is called tumbling in a state where the laundry 7 is submerged. Not that.

  When a predetermined shower cleaning time has elapsed, the shower cleaning operation is terminated, the second water supply valve 14 is turned off (closed), the drain valve 30 is turned on (open), and a drain tumbling operation is performed. The drain tumbling operation includes drain 1 and drain 2. In the drain 1 and the drain 2, the control device 41 controls the main motor 17 to control the rotation speed of the drum 4. For example, the left rotation is 5 seconds, the stop is 4 seconds, the right rotation is 5 seconds, and the stop is 4 seconds. It is controlled to tumbl at about 50 rpm repeatedly. At this time, the drainage motor 31 is controlled by the control device 41, the drainage valve 30 is opened, and the water in the water tank 6 is drained.

  Whether or not the operation of the drainage 1 has been completed is determined based on the output of the water level sensor 42. That is, after the operation of the drainage 1 starts, the water level in the water tank 6 is constantly detected by the water level sensor 42, and when it is determined that the water level in the water tank 6 has reached the predetermined water level, the operation of the drainage 1 is terminated. The operation of the drain 2 is started. Whether or not the operation of the drainage 2 is completed is determined by the elapsed time after the pre-washing, and the operation of the drainage 2 is ended after a predetermined time has elapsed from the start of the operation of the drainage 2. When the operation of the drainage 2 ends, the pre-washing step in the pre-washing course ends. The circulation pump 35 is off (closed) during the entire pre-washing course. Therefore, the washing water containing the dirt washed off from the laundry 7 is circulated by the circulation pump 35, and the dirt in the circulating washing water is prevented from re-adhering to the laundry 7.

  When the pre-washing step is completed in the pre-washing course, the pre-washing controller 49 shifts to a dehydration step. In the dehydration step, first, a balance operation is performed. The balance operation is an operation for eliminating the imbalance of the drum 4, and the drum 4 is sequentially rotated in the normal direction, the rotation is stopped, the reverse rotation is stopped, and the rotation is stopped, so that the laundry 7 in the drum 4 is tumbled. When the balance detection detects that the imbalance has been eliminated, low-speed dehydration at 450 rpm is performed, followed by high-speed dehydration at 1000 rpm. Then, the dehydration step in which the rotation speed of the drum 4 is reduced to 0 rpm is performed, whereby the dehydration step in the pre-wash course is completed.

  According to the first embodiment, in the pre-wash course, the droplet shower flow S, which is a granular swirling flow, is jetted onto the laundry 7 accommodated in the rotating drum 4 and at the same time, the laundry 7 The dirt adhering to the surface can be pre-washed with water, so that the time for storing water can be reduced. Therefore, the dirt adhering to the laundry 7 can be removed in advance by the strong detergency of the droplet shower flow S, and the dirt dissolved in the washing water by the pre-wash is less likely to re-adhere to the laundry 7 during the pre-wash. Become. In addition, since pre-washing with tap water without using a detergent eliminates the need for defoaming, the operation time of the pre-wash course can be reduced.

  In the present embodiment, only one pre-washing course is provided as a pre-washing course, in which the droplet shower flow S, which is a granular swirling flow, is sprayed onto the laundry 7 stored in the rotating drum 4. However, a plurality of pre-wash courses may be provided. For example, the pre-washing course 1 is a droplet shower pre-washing which is the swirling flow of the first embodiment, and the pre-washing course 2 is a pool water pre-washing for storing water in a water receiving tank as described in Patent Document 1. Alternatively, the user may be able to make a selection on the setting display unit 5.

(2nd Embodiment)
The processing procedure after the end of the prewash course according to the second embodiment will be described with reference to FIGS.

  When the pre-washing course is completed in step S01, in step S02, the notification unit 57 notifies that the pre-washing course is completed. The notification of the end of the pre-washing course by the notification unit 57 is performed by, for example, a notification sound by a buzzer, a voice utterance by a speaker, blinking of an LED lamp, and the like. When the pre-washing course is completed, the setting display section 5 displays that the remaining operation time is zero.

  In step S03, it is determined whether or not the completed course is a pre-wash course. If it is determined that the completed course is not the pre-washing course (NO in step S03), control device 41 controls washing machine 1 to wait in the power-off mode (step S06).

  If it is determined that the completed course is the pre-washing course (YES in step S03), in step S04, use state determining unit 51 determines whether washing machine 1 is in the use state. If it is determined that the washing machine 1 is not in use (NO in step S04), the process proceeds to the next step S05.

  Here, the determination as to whether or not the washing machine 1 is in the use state by the use state determination unit 51 is, for example, whether or not the user operates the washing machine 1 or the presence of the user in the vicinity of the washing machine 1. Refers to the presence or absence of. More specifically, the operation of the washing machine 1 by the user indicates that the opening and closing operation of the door 3 and the key operation on the setting display unit 5 are performed by the user. The opening / closing operation of the door 3 by the user is detected by the door switch 45. A key operation on the setting display unit 5 by the user is detected by pressing a selection key 5a such as a course selection key or a start key on the setting display unit 5. Further, the presence or absence of the user in the vicinity of the washing machine 1 more specifically indicates that the presence or absence of the user in the vicinity of the washing machine 1 is detected by a human sensor such as an infrared sensor (not shown). I have. That is, in these examples, when the operation of the washing machine 1 is performed, when the door 3 is opened and closed, and when the human sensor detects that the user is in the vicinity of the washing machine 1, each of the operations is performed. Is determined that the washing machine 1 is in use.

  In step S05, the elapsed time determination unit 54 determines whether the first predetermined time has elapsed. Here, the first predetermined time is, for example, 1 hour to 2 hours. If it is determined that the first predetermined time has not elapsed (NO in step S05), the process returns to step S04.

  When the elapsed time determination unit 54 determines that the first predetermined time has elapsed (YES in step S05), the control device 41 controls the washing machine 1 to wait in the power-off mode (step S05). S07).

  When it is determined that washing machine 1 is in use (YES in step S04), the operations shown in FIGS. 9 to 11 are performed.

  FIG. 9 shows the first embodiment, and when it is determined in step S04 of FIG. 8 that the washing machine 1 is in the use state, in step S11, after the pre-wash course is completed by the notification unit 57, A first message that alerts the user to the correct mode of use is announced. The pre-washing course is a course for preliminarily washing off dirt such as mud stains and food spills adhered to the laundry 7, and therefore, it is assumed that the main washing course is executed following the pre-washing course. Therefore, for example, a first message such as “Do you want to execute the main wash course following the pre-wash course?” Is notified. Note that the notification in this case is preferably audio notification.

  After the notification is made in step S11, the control device 41 controls the washing machine 1 to wait in the power-off mode (step S12).

  A second embodiment will be described with reference to FIG. When it is determined in step S04 in FIG. 8 that the washing machine 1 is in the use state, in step S16 in FIG. 10, the setting display unit 5 is controlled so as to be in an initial settable state. The CPU of the control device 41 performs the same initialization processing (for example, microcomputer reset) as operating the power on / off key of the selection key 5a to turn on the power so that the setting display unit 5 can be initialized. Is going. In the state where initial setting is possible, the system is set up so as to be able to accept a key input for setting a washing course and the like. Therefore, in the setting display section 5, the setting of the next washing course performed after the pre-washing course can be performed.

  In step S17, the elapsed time determination unit 54 determines whether the second predetermined time has elapsed. Here, the second predetermined time is a predetermined time to wait until the next setting operation is performed when the setting operation is interrupted, for example, about 5 minutes. The standby state continues until the second predetermined time elapses. When it is determined that the second predetermined time has elapsed (YES in step S17), control device 41 controls washing machine 1 to wait in the power-off mode (step S18).

  A third embodiment will be described with reference to FIG. When it is determined in step S04 in FIG. 8 that the washing machine 1 is in the use state, in step S21 in FIG. 11, the notification unit 57 guides the user to a correct use mode after the pre-wash course is completed. Such a first message is broadcast.

  After the notification is made in step S21, in step S22, the setting display unit 5 is set to a state where initial setting is possible. In step S23, the elapsed time determination unit 54 determines whether the second predetermined time has elapsed. The standby state continues until the second predetermined time elapses. Then, when it is determined that the second predetermined time has elapsed (YES in step S23), control device 41 controls washing machine 1 to wait in the power-off mode (step S24).

  According to the second embodiment, the user can be guided to a correct use mode by the notification after the completion of the pre-washing course. Therefore, it is possible to prevent the user from misunderstanding that the main washing has been completed even though only the pre-washing course is executed, and it is possible to improve customer satisfaction. In addition, by setting the setting display unit 5 to be in an initial settable state after the pre-washing course is completed, the user can immediately select and set the next washing course or the like, thereby improving customer satisfaction. Can be.

(Third embodiment)
The processing procedure after the end of the pre-washing course according to the third embodiment will be described with reference to FIGS.

  FIG. 12 shows a fourth example of the third embodiment. After the pre-washing course is completed in step S31, in step S32, the notification unit 57 notifies that the pre-washing course is completed. The notification of the end of the pre-washing course by the notification unit 57 is performed by, for example, a notification sound by a buzzer, a voice utterance by a speaker, blinking of an LED lamp, and the like. After notifying the end of the pre-washing course, the control device 41 controls the washing machine 1 to wait in the power-off mode (step S33).

  The time measuring unit 53 in the fourth embodiment is realized by a real time clock (RTC: Real Time Clock) capable of measuring the current time. According to the real-time clock, even in the power-off mode, the current time can be kept ticking by receiving power supply from the built-in battery. The time measuring unit 53 measures the pre-washing course end time at which the pre-washing course has ended and the next operation restart time at which the power-on key is operated and the power is turned on again. The time measuring unit 53 calculates the elapsed time after the pre-wash by subtracting the pre-wash course end time from the next operation restart time when the power is turned on again. Here, the operation of the power-on key to turn on the power again corresponds to the restart of the next operation.

  In step S34, the elapsed time determination unit 54 determines whether the elapsed time after the pre-wash has passed the third predetermined time. Here, the third predetermined time is, for example, about 10 minutes. If it is determined that the post-prewash elapsed time has not passed the third predetermined time (NO in step S34), in step S36, notification section 57 notifies the second message.

  The fact that the elapsed time after the pre-wash is shorter than the third predetermined time is considered that the user intends to restart the next main washing operation after the end of the pre-wash course. That is, it is considered that the user understands that the pre-washing course is a preliminary washing. Therefore, for example, as the second message, "Please continue to add detergent and perform main washing." Or "If there is additional laundry, execute main washing." A message that supports the next book wash operation is notified. Note that the notification in this case is preferably audio notification.

  If the elapsed time determination unit 54 determines that the elapsed time after pre-wash has passed the third predetermined time (YES in step S34), the notification unit 57 notifies the third message in step S36.

  The fact that the elapsed time after the pre-wash is longer than the third predetermined time indicates that the user does not intend to perform the next main washing operation after the end of the pre-wash course. That is, it is considered that the user does not understand that the pre-washing course is only a preliminary washing and the next main washing operation is required. Therefore, for example, as a third message, "The pre-washing course is only preliminary washing. Then, please select the main washing course." Or "The laundry after the pre-washing course remains wet. A message that teaches the correct meaning of the pre-wash course is announced. Note that the notification in this case is preferably audio notification. Thus, the second message and the third message are different.

  FIG. 13 shows a fifth example of the third embodiment. After the pre-washing course is completed in step S41, in step S42, the notification unit 57 notifies that the pre-washing course is completed. The notification of the end of the pre-washing course by the notification unit 57 is performed by, for example, a notification sound by a buzzer, a voice utterance by a speaker, blinking of an LED lamp, and the like. After notifying the end of the pre-washing course, the setting display unit 5 displays that the remaining operation time is zero while continuing the power-on (step S43).

  The time measuring unit 53 in the fifth embodiment is realized by a timer. The timer starts the measurement from the end of the pre-washing course, and ends the measurement when the setting display unit 5 is in a state where initial setting is possible, thereby measuring the elapsed time after the pre-washing. Here, the state in which the setting display unit 5 can be initialized can correspond to the next operation restart. The initial setting possible state is, as described above, because the same initialization processing as when the power is turned on by operating the power on / off key of the selection key 5a is performed to set a washing course or the like. Means that the system is ready to accept key inputs.

  In step S44, the elapsed time determination unit 54 determines whether or not the elapsed time after pre-wash has exceeded the third predetermined time. Here, the third predetermined time is, for example, about 10 minutes. If it is determined that the post-prewash elapsed time has not passed the third predetermined time (NO in step S44), notification unit 57 notifies the second message in step S46.

  The fact that the elapsed time after the pre-wash is shorter than the third predetermined time is considered that the user is about to perform the next main washing operation at the end of the pre-wash course. That is, it is considered that the user understands that the pre-washing course is a preliminary washing. Therefore, for example, as the second message, "Continue, add detergent and perform main wash." Or "Please insert additional laundry and perform main wash." A message that supports the main washing operation is notified.

  When the elapsed time determination unit 54 determines that the elapsed time after pre-wash has passed the third predetermined time (YES in step S44), the notification unit 57 notifies the third message in step S45.

  The fact that the elapsed time after the pre-wash is longer than the third predetermined time indicates that the user does not intend to perform the next main washing operation after the end of the pre-wash course. That is, it is considered that the user does not understand that the pre-washing course is only a preliminary washing and the next main washing operation is required. Therefore, for example, as a third message, "The pre-washing course is only preliminary washing. Then, please select the main washing course." Or "The laundry after the pre-washing course remains wet. A message that teaches the correct meaning of the pre-wash course is announced. Therefore, the second message and the third message are different.

  According to the third embodiment, the next main washing operation is supported by the determination result whether the elapsed time after the prewash from the end of the prewash course to the restart of the next operation is shorter or longer than the third predetermined time. A different message, such as a message indicating that the pre-washing course is performed or a message indicating the correct meaning of the pre-washing course, is notified from the notification unit 57. Therefore, advice after the end of the pre-washing course can be appropriately and timely provided.

(Fourth embodiment)
The processing procedure of the cloth amount detection operation according to the fourth embodiment will be described with reference to FIGS.

  In the washing machine 1 provided with the pre-wash course and the main wash course, it is assumed that after washing the heavily soiled laundry 7, the laundry 7 with less soil is additionally thrown in and fully washed. Before executing the pre-washing step and the main washing step, it is efficient to detect the weight of the dry laundry 7 (hereinafter referred to as the cloth amount) and determine the washing conditions based on the detected cloth amount. Enables efficient washing. However, in the laundry 7 before the execution of the main washing process, the wet laundry 7 after the pre-wash and the dry laundry 7 to be additionally inputted are mixed. Even when the laundry amount is detected for the laundry 7 in which the wet laundry 7 and the dry laundry 7 are mixed, an error in the laundry amount detection becomes large due to the amount of moisture contained in the wet laundry 7. Would. For example, Japanese Patent Application Laid-Open No. 2008-183122 discloses that the cloth amount is detected three times before pre-washing, after pre-washing, and before main washing. However, in this method, since the detection of the amount of cloth is performed three times, it takes time to detect the amount of cloth, and the total washing time becomes longer.

  Therefore, in the fourth embodiment, it is intended to relatively accurately correct the cloth amount of the laundry 7 supplied to the main washing course while reducing the number of cloth amount detections.

  FIG. 14 is a flowchart illustrating a sixth example of the processing procedure of the cloth amount detection operation performed by the cloth amount detection unit 50 and the calculation unit 55 of the control device 41. It is assumed that the amount of laundry 7 to be provided to the pre-wash course is 2 kg at the maximum. Therefore, irrespective of the cloth quality and amount of the laundry 7 that is actually prewashed, the water content (the prewash water content) Wp that will be contained in the laundry 7 by the prewash is equal to a predetermined moisture content. It is assumed that For example, it is assumed that the laundry 7 after the pre-washing course contains water of 30% of the cloth amount. Then, the pre-wash water content becomes 600 g. As described above, assuming that the wet laundry 7 contains a certain predetermined water content W as the pre-wash water content Wp, the certain predetermined water content W is stored in the storage unit 56. I have.

  When the pre-wash course is selected in step S51 of FIG. 14, the pre-wash course is executed by the pre-wash controller 49 in step S52. In the pre-washing course of step S52, for example, the pre-washing course described in the first embodiment, that is, the pre-washing course of shower cleaning in which the tap water droplet shower stream S is jetted is executed. After the pre-washing course, the drum 4 contains wet laundry 7.

  In step S53, the setting determining unit 52 determines whether or not the main washing course has been selected. If it is determined that the main washing course has not been selected (NO in step S53), control device 41 controls washing machine 1 to wait in the power-off mode (step S59).

  If it is determined that the main washing course is selected (YES in step S53), in step S54, the prewash water content Wp of the wet laundry 7 after the end of the prewash course is calculated. In this case, a predetermined water content W stored in the storage unit 56 is used as the pre-wash water content Wp.

  In step S55, the dry laundry 7 is additionally loaded into the drum 4, and the laundry amount detection unit 50 of the control device 41 detects the laundry amount (cloth amount before final washing) Qm of the laundry 7 before the final washing. Is done. The detection of the laundry amount of the laundry 7 before the main washing is performed on the laundry 7 in which the wet laundry 7 after the pre-washing and the dry laundry 7 to be additionally input are mixed. Further, the detection of the cloth amount before the main washing by the cloth amount detection unit 50 is obtained, for example, by rotating the drum 4 in which the laundry 7 is stored by the main motor 17, and by using the motor torque fluctuation value in that case.

  The method of detecting the cloth amount by the cloth amount detection unit 50 is, for example, calculating an inertia moment including a load between the washing tub and the cloth using the actually measured angular velocities at the time of acceleration and deceleration. The cloth amount may be obtained by referring to the table based on the table.

  In step S56, the calculation section 55 of the control device 41 calculates the estimated main washing amount Qe of the laundry 7 before the main washing. More specifically, the cloth amount Qm before the main washing detected in step S55 (the mixed total cloth amount obtained by summing the cloth amount of the wet laundry 7 after the pre-washing and the cloth amount of the newly added dry laundry 7). ) Is subtracted from the predetermined water content W stored in the storage unit 56 to calculate the estimated main washing amount Qe. The estimated amount Qe of the main wash may be considered to be relatively close to the total dry amount obtained by adding the dry amount of the dry laundry 7 before the pre-wash and the additional dry amount of the dry laundry 7. it can.

  In step S57, a main wash course is executed based on the estimated main wash amount Qe calculated in step S56. Specifically, in the main washing course, the necessary water amount, detergent amount and operation control in the main washing step are determined according to the estimated main washing amount Qe, and the rinsing time and the dehydration step in the rinsing step are determined. Is determined, and the operation of the main washing course is optimized. When the main washing course includes a drying step, the drying time is determined. Then, in step S58, the main washing course ends.

  In the cloth amount detecting method according to the sixth embodiment, since the cloth amount is detected only once and the time required for the cloth amount detection is short, dirt such as mud dirt and food spillage is preliminarily washed off in a short time. It is particularly suitable for the case where the pre-wash course described in the first embodiment is provided.

  A seventh embodiment relating to the processing procedure of the cloth amount detection operation will be described with reference to FIG.

  FIG. 15 is a flowchart illustrating a seventh example of the processing procedure of the cloth amount detection operation performed by the pre-wash control unit 49 and the main wash control unit 48 of the control device 41. In the seventh embodiment, the cloth amount is detected twice before the pre-wash and before the main wash.

  Then, based on the cloth amount of the laundry 7 before pre-washing (cloth amount before pre-washing) Qp, the water content (pre-washing water content) Wp that will be contained in the laundry 7 by the pre-washing is calculated. The calculation formula or calculation table is stored in the storage unit 56. Note that the calculation formula or calculation table for the prewash water content Wp is obtained in advance so as to correspond to the pre-wash cloth amount Qp. The pre-wash water content Wp calculation table has, for example, data of the pre-wash water amount Qp and the pre-wash water content Wp in increments of 500 g.

  Further, the storage unit 56 includes a plurality of pre-wash water content Wp calculation formulas or calculation tables, and the plurality of pre-wash water content Wp calculation formulas or calculation tables are stored in association with a plurality of fabric types. May be configured. Then, the user determines whether the laundry 7 has a larger number of hydrophilic fibers or hydrophobic fibers, and can select and select from a plurality of cloth types by using the selection key 5a.

  When the pre-wash course is selected in step S61 of FIG. 15, the cloth amount detector 50 of the control device 41 detects the pre-wash amount Qp in step S62. The detection of the cloth amount before pre-washing by the cloth amount detection unit 50 is performed, for example, by rotating the drum 4 containing the dry laundry 7 for pre-washing by the main motor 17, and obtaining the fluctuation value of the motor torque in that case. Can be

  In step S63, the pre-wash water content Wp is calculated by the calculation unit 55 based on the cloth amount detection before pre-wash detected in step S62. The calculated pre-wash water content Wp is stored in the storage unit 56.

  In step S64, the pre-washing course is executed by the pre-washing control unit 49. In the pre-washing course of step S64, for example, the above-described pre-washing course of the first embodiment is executed. After the pre-washing course, the drum 4 contains wet laundry 7.

  In step S65, the setting determination unit 52 determines whether or not the main washing course has been selected. If it is determined that the main washing course has not been selected (NO in step S65), control device 41 controls washing machine 1 to wait in the power-off mode (step S70).

  If it is determined that the main washing course has been selected (YES in step S65), in step S66, the dry laundry 7 is additionally loaded into the drum 4, and the laundry amount detection unit 50 of the control device 41 performs The cloth amount (cloth amount before main washing) Qm of the laundry 7 before washing is detected. In step S66, the laundry amount detection of the laundry 7 before the main washing is performed on the laundry 7 in which the wet laundry 7 after the pre-wash and the dry laundry 7 to be additionally input are mixed. The detection of the cloth amount before the main washing by the cloth amount detection unit 50 is obtained, for example, by rotating the drum 4 containing the laundry 7 by the main motor 17 and by using a fluctuation value of the motor torque in that case.

  As in the sixth embodiment, the method of detecting the cloth amount by the cloth amount detection unit 50 calculates, for example, the moment of inertia including the load on the washing tub and the cloth using the actually measured angular velocities during acceleration and deceleration. The cloth amount may be obtained by referring to a table based on the calculated moment of inertia.

  In step S67, the calculation unit 55 of the control device 41 calculates the estimated main washing amount Qe of the laundry 7 before the main washing. Specifically, the cloth amount Qm before the main washing detected in step S66 (the mixed total cloth amount obtained by summing the cloth amount of the wet laundry 7 after the pre-washing and the cloth amount of the added dry laundry 7). ) Is subtracted from the pre-wash water content Wp stored in the storage unit 56 to calculate the estimated main wash amount Qe. The estimated amount Qe of the main wash is considered to be relatively close to the total dry amount obtained by adding the dry amount of the dry laundry 7 before pre-washing and the additional dry laundry 7. Can be.

  In step S68, the main wash course is executed based on the estimated main wash amount Qe calculated in step S67. Specifically, in the main washing course, the necessary water amount, detergent amount and operation control in the main washing step are determined according to the estimated main washing amount Qe, and the rinsing time and the dehydration step in the rinsing step are determined. Is determined, and the operation of the main washing course is optimized. When the main washing course includes a drying step, the drying time is determined. Then, in step S69, the main washing course ends.

  In the cloth amount detection method of the seventh embodiment, since the cloth amount is detected only twice, the total time required for the cloth amount detection is shorter than the method disclosed in JP-A-2008-183122, and the sixth embodiment The accuracy of cloth amount detection can be increased as compared with the example method.

The washing machine 1 of the present invention comprises:
Outer box 1a,
A water tank 6 arranged in the outer box 1a;
A rotating tub 4 rotatably arranged in the water tub 6 and containing laundry 7;
A driving device 17 for rotatingly driving the rotating tub 4;
A water supply nozzle 25 for injecting a water flow S toward the laundry 7 accommodated in the rotating tub 4;
A water supply valve 14 for controlling water supply to the water supply nozzle 25;
A control device 41 that controls the drive device 17 and the water supply valve 14; and a circulation pump 35 that circulates washing water drained from the water tank 4 back into the water tank 4;
The control device 41 controls the driving device 17 and the water supply valve 14 to inject the water flow S and rotate the rotating tub 4 to thereby prevent dirt attached to the laundry 7 with the water flow S. A pre-washing course for washing is executed, and control is performed such that the circulation pump 35 does not operate in the pre-washing course.

  According to the above configuration, the circulating water containing dirt is not used, and the water stream S made of clean water is jetted onto the laundry 7 accommodated in the rotating rotary tub 4, whereby the laundry 7 is washed. The dirt adhered to the surface can be pre-washed with clean water. Therefore, the dirt adhering to the laundry 7 can be removed in advance by the strong detergency of the water flow S injected from the water supply nozzle 25, and the dirt dissolved in the washing water by the pre-washing is applied to the laundry 7 during the pre-washing. Reattachment becomes difficult. Further, the operation time of the pre-wash can be reduced.

  It is preferable that the water flow S injected from the water supply nozzle 25 is a granular swirl flow S.

  According to the above configuration, the granular swirling flow S has a strong detergency despite the small amount of water.

A use state determining unit 51 that determines whether the washing machine 1 is in use based on whether the user has operated the washing machine 1 or whether there is a user near the washing machine 1; ,
And a notifying unit 57 for notifying a message.
It is preferable that the control device 41 controls the notification unit 57 to notify a message regarding the pre-washing course when the use state determination unit 51 determines that the washing machine 1 is in the use state.

  According to the above configuration, the user is guided to a correct use mode after the pre-washing course is completed by the message about the pre-washing course notified from the notifying unit 57. Therefore, it is possible to prevent the user from misunderstanding that the main washing has been completed even though only the pre-washing course is executed, and it is possible to improve customer satisfaction.

A use state determining unit 51 that determines whether the washing machine 1 is in use based on whether the user has operated the washing machine 1 or whether there is a user near the washing machine 1; ,
A setting display unit 5 for selecting and setting a desired washing course from among the washing courses including the pre-washing course and the main washing course,
It is preferable that the control device 41 controls the setting display unit 5 to be in an initial setting enabled state when the use state determination unit 51 determines that the washing machine 1 is in the use state.

  According to the above configuration, after the pre-washing course is completed, the setting display unit 5 is set in an initial setting-enabled state, so that the user can immediately select and set the next washing course or the like, so that the customer satisfaction Can be improved.

A time measuring unit 53 that measures an elapsed time after the prewash from the end of the prewash course to the restart of the next operation;
An elapse time determination unit that determines whether or not the elapsed time after the pre-wash exceeds a predetermined time; and a notification unit 57 that notifies a message.
The control device 41 controls the notification unit 57 to notify the message according to the determination result by the elapsed time determination unit 54 as to whether the elapsed time after the pre-wash has passed a predetermined time. Is preferred.

  According to the above configuration, the elapsed time after prewashing from the end of the prewash course to the restart of the next operation is a message that supports the next driving operation, based on the determination result of whether it is shorter or longer than a predetermined time, or A different message, such as a message that teaches the correct meaning of the prewash course, is notified from the notification unit 57. Therefore, advice after the end of the pre-washing course can be appropriately and timely provided.

A cloth amount detection unit 50 that detects a cloth amount that is the amount of the laundry 7;
A calculating section 55 for calculating a main wash estimated cloth amount Qe based on the cloth amount detected by the cloth amount detecting section 50;
The control device 41 controls the driving device 17 and the water supply valve 14 to execute the pre-washing course and the main washing course performed after the pre-washing course,
The calculation unit 55 subtracts a predetermined water content W as the water content by the pre-wash from the pre-wash water amount Qm detected by the cloth amount detection unit 50 before the execution of the main wash course. Then, it is preferable to calculate the estimated main washing amount Qe.

  According to the above configuration, since the amount of cloth detection is performed only once, and the time required for detecting the amount of cloth can be shortened, the purpose is to preliminarily wash off dirt such as mud dirt and missing food in a short time. It is particularly suitable when a washing course is provided.

A cloth amount detection unit 50 that detects a cloth amount that is the amount of the laundry 7;
A calculating unit 55 that calculates the pre-wash water content Wp and the main wash estimated cloth amount Qe based on the cloth amount detected by the cloth amount detection unit 50;
The control device 41 controls the driving device 17 and the water supply valve 14 to execute the pre-washing course and the main washing course performed after the pre-washing course,
The calculation unit 55 calculates the pre-wash water content Wp based on the pre-wash amount Qp detected by the cloth amount detection unit 50 before the execution of the pre-wash course, and calculates the pre-wash water content Wp before the execution of the main wash course. Preferably, the pre-wash water content Wp is subtracted from the pre-cleaning cloth amount Qm detected by the cloth amount detection unit 50 to calculate the estimated main cleaning cloth amount Qe.

  According to the above configuration, since the detection of the amount of cloth is performed only twice, the total time required for detecting the amount of cloth can be shortened, and the accuracy of detecting the amount of cloth can be improved.

  Although the embodiments of the present invention have been specifically described, the present invention is not limited to the above embodiments, and can be implemented with various modifications within the scope of the present invention.

  The washing machine 1 described above may have a drying function or may not have a drying function. When the washing machine 1 has a drying function, the drying function is provided by, for example, a heater drying method of generating warm air by a sheathed heater or a heat pump drying method of generating warm air by a heat pump.

  In the above embodiment, the drum-type washing machine 1 has been described as the washing machine 1. However, the washing machine 1 has the rotating tub 4 arranged in the vertical direction (vertical direction), and performs the washing step and the rinsing step by rotating the pulsator. Alternatively, a vertical washing machine that performs a dehydration step of the laundry 7 by rotating the rotating tub 4 at a high speed may be used. In the vertical washing machine, the driving device 17 that rotates the rotating tub 4 includes, for example, a motor, a brake, and a clutch.

  In the above embodiment, the water supplied to the shower nozzle 25 and used as the droplet shower flow S is high-purity tap water, but is supplied by connecting a bath water pump to the water supply port 12a via a hose. It may be bath water.

  The pre-washing process of the pre-wash course in the second, third, and fourth embodiments is limited to the shower cleaning in which the droplet shower flow S of tap water is jetted as described in the first embodiment. Instead, it may be pre-washing using a tumbling or detergent in which water is stored up to a predetermined water level.

DESCRIPTION OF SYMBOLS 1 Drum type washing machine 1a Outer box 2 Outer box opening 3 Door 4 Drum (rotary tub)
5 Setting display section 5a Selection key (setting section)
Reference Signs List 6 water tank 7 laundry 8 storage case 9 storage case water supply path 10 water tank water supply path 11 shower water supply path 12 water supply part 12a water supply port 13 first water supply valve 14 second water supply valve (water supply valve, shower water supply valve)
15 Water tank opening 17 Main motor (drive device)
18 Drum opening 23 First path 24 Second path 25 Shower nozzle (water supply nozzle)
35 Circulation pump 38 Whirler
41 control device 45 door switch 48 main wash control unit 49 pre-wash control unit 50 cloth amount detection unit 51 use state determination unit 52 setting determination unit 53 time measurement unit 54 elapsed time determination unit 55 calculation unit 56 storage unit 57 notification unit S liquid Drop shower flow (granular swirl flow, water flow)

Claims (7)

Outer box,
A water tank arranged in the outer box,
A rotating tub rotatably arranged in the water tub and containing laundry;
A driving device that rotationally drives the rotary tank,
A water supply nozzle for injecting a water flow toward the laundry stored in the rotating tub,
A water supply valve for controlling water supply to the water supply nozzle,
A control device that controls the driving device and the water supply valve to execute a pre-wash course including a pre-wash step and a dehydration step before the main wash course,
A circulation pump that circulates washing water drained from the water tank back into the water tank;
E Bei a discharge valve for discharging the water in the water tank outside of the outer box,
The control device controls the driving device and the water supply valve to inject the water flow and rotate the rotating tub, thereby pre-washing the dirt attached to the laundry with the water flow. In the pre-washing course, the circulation pump is controlled not to operate and the laundry is controlled so as not to be submerged, and the drain valve is closed at the time of the pre-washing step, and at the time of the dehydration step. A washing machine for opening the drain valve. The washing machine according to claim 1 ,
A water tank water supply path that communicates with a storage case that stores the laundry treatment agent and supplies water from the storage case into the water tank;
A shower water supply path for supplying water into the water tank without passing through the storage case,
A washing machine in which the water supply nozzle is provided in the shower water supply path. Outer box,
A water tank arranged in the outer box,
A rotating tub rotatably arranged in the water tub and containing laundry;
A driving device that rotationally drives the rotary tank,
A water supply nozzle for injecting a water flow toward the laundry stored in the rotating tub,
A water supply valve for controlling water supply to the water supply nozzle,
A control device that controls the driving device and the water supply valve to execute a pre-wash course including a pre-wash step and a dehydration step before the main wash course,
A circulation pump that circulates washing water drained from the water tank back into the water tank;
A water tank water supply path that communicates with a storage case that stores the laundry treatment agent and supplies water from the storage case into the water tank;
For example Bei and the shower water supply path for supplying water to the water tank without passing through the housing case,
The water supply nozzle is provided in the shower water supply path ,
The control device controls the driving device and the water supply valve to inject the water flow and rotate the rotating tub, thereby pre-washing the dirt attached to the laundry with the water flow. A washing machine that controls the circulation pump not to operate in the pre-washing course and to prevent the laundry from submerging . The washing machine according to any one of claims 1 to 3,
The washing machine according to claim 1, wherein the water flow injected from the water supply nozzle is a granular swirling flow. The washing machine according to any one of claims 1 to 4,
Whether or not the user has operated the washing machine, or a use state determination unit that determines whether or not the washing machine is in use by the presence or absence of the user in the vicinity of the washing machine,
And a notifying unit for notifying a message,
The washing machine is characterized in that, when the use state determination unit determines that the washing machine is in the use state, the control unit controls the notification unit to notify a message related to the prewash course. The washing machine according to any one of claims 1 to 5,
A cloth amount detection unit that detects a cloth amount that is an amount of the laundry;
A calculating unit that calculates a main wash estimated cloth amount based on the cloth amount detected by the cloth amount detection unit,
The control device controls the drive device and the water supply valve to execute the pre-washing course and the main washing course performed after the pre-washing course,
The calculation unit subtracts a predetermined water content as the water content by the pre-wash from the cloth amount before the main wash detected by the cloth amount detection unit before the execution of the main wash course, A washing machine for calculating an estimated amount of main washing. The washing machine according to any one of claims 1 to 5,
A cloth amount detection unit that detects a cloth amount that is an amount of the laundry;
A calculating unit for calculating a pre-wash water content and a main wash estimated cloth amount based on the cloth amount detected by the cloth amount detection unit,
The control device controls the drive device and the water supply valve to execute the pre-washing course and the main washing course performed after the pre-washing course,
The calculation unit calculates the pre-wash water content based on the pre-wash amount detected by the cloth amount detection unit before the execution of the pre-wash course, and calculates the cloth amount before the execution of the main wash course. A washing machine, wherein the pre-wash water content is subtracted from the pre-wash amount of cloth detected by the detection unit to calculate the estimated main wash amount.

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