JP2017164195A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washing machine capable of adjusting a force which an object to be washed receives during washing.SOLUTION: On an inner peripheral surface of a rotary drum 4, a plurality of agitation protrusions 25 for agitating objects to be washed are provided side by side in a protrusive manner in the rotation direction of the rotary drum 4. The agitation protrusion 25 has a first agitation inclined surface 25a facing a normal rotation direction R1 of the rotary drum 4, and a second agitation inclined surface 25b facing a reverse rotation direction R2. A first inclination angle θ1 formed by the first agitation inclined surface 25a and the inner peripheral surface of the rotary drum 4 is set to be smaller than a second inclination angle θ2 formed by the second agitation inclined surface 25b and the inner peripheral surface of the rotary drum 4.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a washing machine that performs washing by rotating a rotating drum in a state where an object to be washed such as clothes and a washing liquid are stored.

  2. Description of the Related Art Conventionally, a washing machine having a rotating drum with a rotating shaft in a horizontal orientation rotates the rotating drum in a state where the article to be washed and the washing liquid are stored in the rotating drum, and performs a washing process, a rinsing process, a draining process, and the like. The article to be washed is washed through a plurality of steps (see, for example, Patent Document 1). Also, a cleaning company that uses a washing machine performs washing by changing the washing liquid used for washing according to the material of the item to be washed, based on the care label (washing label) of the item to be washed. For example, in general, washing (laundry cleaning) is performed using water as a washing liquid, but when washing a material that is easily affected by water (for example, wool or silk that easily shrinks when washed with water) Laundry (dry cleaning) is performed using an organic solvent instead of water.

JP 2007-236759 A

  By the way, in recent cleaning contractors, washing (wet cleaning) is sometimes performed on water to be cleaned, which uses water to remove water-soluble dirt. In wet cleaning, it is necessary to perform washing while suppressing the influence and force of water (a force received when stirring or hitting) as much as possible.

  However, in a conventional washing machine (a washing machine that performs laundry cleaning), even though water can be used as a washing liquid, the force that the washing object receives in the rotating drum cannot be adjusted, and good wet cleaning is possible. It is difficult to carry out. In addition, it may be possible to introduce a washing machine dedicated to wet cleaning with reduced force on the object to be washed, but this increases the burden on the cleaning company.

  The present invention has been proposed in view of the above circumstances, and an object of the present invention is to provide a washing machine capable of adjusting the force received by an object to be washed during washing.

The present invention has been proposed in order to achieve the above object. According to the first aspect of the present invention, an object to be washed and washing liquid are accommodated in a rotating drum having a rotating shaft in a lateral orientation, and the rotating drum is provided. In a washing machine that performs washing by rotating
On the inner peripheral surface of the rotating drum, a plurality of stirring protrusions for stirring the object to be washed are juxtaposed in the rotating direction of the rotating drum,
The stirring protrusion includes a first stirring inclined surface facing the forward rotation direction of the rotating drum and a second stirring inclined surface facing the reverse rotation direction,
The first inclination angle formed by the first stirring inclined surface and the inner peripheral surface of the rotating drum is set to be smaller than the second inclination angle formed by the second stirring inclined surface and the inner peripheral surface of the rotating drum. A washing machine characterized by

According to a second aspect of the present invention, an engagement protrusion that engages an object to be washed is provided between adjacent stirring protrusions on the inner peripheral surface of the rotating drum.
The engaging protrusion includes an engaging inclined surface facing the second stirring inclined surface of the stirring protrusion, and an engaging inclination angle formed by the engaging inclined surface and an inner peripheral surface of the rotating drum is the first. The washing machine according to claim 1, wherein the washing machine is set to be larger than an inclination angle.

The thing of Claim 3 is equipped with the operation panel for rotating the rotation drum and performing washing,
The operation panel includes a display unit that displays an execution state of washing, a first washing setting operation unit that sets execution of washing in the first execution mode, and a second that is different from the first execution mode. A second laundry setting operation unit for setting execution in an execution mode,
The washing machine according to claim 1 or 2, wherein the display unit is disposed between the first laundry setting operation unit and the second laundry setting operation unit.

According to a fourth aspect of the present invention, there is provided a control device that controls execution of washing by rotating the rotating drum, and a detergent supply device that supplies detergent to the washing liquid in the rotating drum,
The detergent supply device can transmit information on the supply amount of detergent that can be supplied into the rotating drum to the control device,
The controller is
When the supply possible amount is larger than a preset supply set amount, it is allowed to execute washing by rotating the rotary drum, and when the supply possible amount is smaller than the detergent supply set amount. 4. The washing machine according to claim 1, wherein the washing machine is regulated by rotating the rotating drum. 5.

According to the present invention, the following excellent effects can be obtained.
According to the first aspect of the present invention, a plurality of stirring protrusions that stir the object to be washed are juxtaposed in the rotation direction of the rotating drum on the inner peripheral surface of the rotating drum, and the stirring protrusions A first agitation inclined surface facing the forward rotation direction of the drum, and a second agitation inclination surface facing the reverse rotation direction, the first inclination formed by the first agitation inclination surface and the inner peripheral surface of the rotating drum. Since the angle is set to be smaller than the second inclination angle formed by the second stirring inclined surface and the inner peripheral surface of the rotating drum, when the rotating drum is rotated in the forward rotation direction, the rotation angle is smaller than when rotating in the reverse rotation direction. The lift of the object to be cleaned in the rotating drum is lowered. Therefore, by changing the rotation direction of the rotating drum, it is possible to adjust the force received by the washing object.

  According to the second aspect of the present invention, between the adjacent stirring protrusions on the inner peripheral surface of the rotating drum, an engaging protrusion that engages with an object to be washed is provided, and the engaging protrusion is An engaging inclined surface that faces the second stirring inclined surface of the stirring protrusion, and an engaging inclination angle formed by the engaging inclined surface and the inner peripheral surface of the rotating drum is set to be larger than the first inclined angle. Therefore, when the rotating drum rotates in the forward rotation direction, the object to be washed that has slipped down the first stirring inclined surface of the stirring protrusion can be received by the engaging inclined surface of the engaging protrusion. It is possible to suppress the inconvenience of moving violently in the interior, and hence the inconvenience of receiving excessive force in the rotating drum.

  According to the third aspect of the present invention, since the display unit is disposed between the first laundry setting operation unit and the second laundry setting operation unit, the first laundry setting operation unit and the second laundry setting operation are performed. The parts can be arranged apart from each other, so that selection errors of the operation part to be operated can be reduced. Therefore, the inconvenience of washing by rotating the rotating drum in a manner inappropriate for the object to be washed, and the inconvenience of executing the washing by applying excessive force to the object to be washed, are to be prevented. can do.

  According to a fourth aspect of the present invention, the cleaner includes: a control device that controls the execution of washing by rotating the rotating drum; and a detergent supply device that supplies a detergent to the washing liquid in the rotating drum. The supply device can transmit information on the supply amount of the detergent that can be supplied into the rotating drum to the control device, and the control device has a case where the supplyable amount is larger than a preset supply set amount. In this case, it is allowed to execute washing by rotating the rotating drum, and when the supplyable amount is smaller than the set amount of detergent supply, the rotating drum is rotated and washing is restricted. Therefore, it is possible to avoid performing washing in a state where the detergent is insufficient.

(A) is a front view of a washing machine, (b) is a side view. It is the schematic explaining the circulation system of the washing water in a washing machine. (A) is the schematic of a rotating drum, (b) is an enlarged view of a stirring protrusion. It is the schematic of an operation panel. It is a block diagram explaining the control system of a washing machine. It is a timing chart from the washing process of a washing machine to a dehydration process. 3 is a timing chart of a washing machine dehydration preparation process, where (a) is a timing chart showing a rotation control command to the drum driving motor and a rotating state of the rotating drum, and (b) is a timing chart showing switching of acceleration of the rotating drum. It is.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the washing machine 1 is provided with a substantially cylindrical shell (outer trunk) 3 in a sideways state inside a housing 2, and a rotary shaft 4 a is in a sideways posture inside the shell 3. The rotating drum 4 is housed in a rotatable state. In addition, a circular opening / closing door 5 is provided at the center of the front surface of the housing 2, and when the opening / closing door 5 is opened, the front side of the shell 3 and the rotating drum 4 is opened so that the objects to be washed can be taken in and out. When the door 5 is closed, the washing object and washing water are prevented from jumping out of the rotating drum 4 during washing. Further, an operation panel 6 capable of selecting execution of laundry cleaning or wet cleaning is arranged at the upper part of the front surface of the housing 2.

  As shown in FIG. 2, the shell 3 has a water supply pipe 11 provided with a water supply valve 11 a connected to the upper part of the shell 3, and washing water (washing liquid) supplied from the water supply pipe 11 is put into the shell 3. It can be stored. In addition, a drain pipe 12 having a drain valve 12 a is connected to the bottom of the shell 3, and the washing water stored in the shell 3 can be discharged to the outside of the washing machine 1 through the drain pipe 12. . In addition, a circular opening 15 that is opened and closed by the opening / closing door 5 is opened on the front surface of the shell 3, and a sealing material (not shown) is provided between the opening edge of the opening 15 and the opening / closing door 5. The inside of the shell 3 can be sealed when the open / close door 5 is closed. Further, an annular sleeve portion 16 projects from the opening edge of the opening portion 15 toward the rear rotating drum 4 side, and the inner space of the sleeve portion 16 is communicated with the rotating drum 4.

  The rotating drum 4 accommodated in the shell 3 has a horizontally-oriented cylindrical shape capable of accommodating the article to be washed and washing water, and the article to be washed is taken in and out on the front side of the rotating drum 4. An object input port 18 is opened to communicate with the inner space of the sleeve portion 16. Further, an infinite number of through holes (not shown) are formed in the peripheral surface of the rotating drum 4 so that washing water enters the rotating drum 4 from the shell 3 through the through holes or from the rotating drum 4 to the shell. 3 is configured to be discharged to 3. Further, the rear portion of the rotary drum 4 is closed to project a rotary shaft 4a, and a rotary drive transmission mechanism (such as a pulley or a timing belt) is provided at an end of the rotary shaft 4a that protrudes outward from the shell 3. A drum driving motor 21 (see FIG. 5) is connected via a not-shown), and the drum driving motor 21 is controlled based on a control signal from a control device 22 (see FIG. 5) provided in the housing 2. By controlling the drive, the rotary drum 4 can be rotated at a preset rotation speed or rotation direction.

  Further, on the inner peripheral surface of the rotating drum 4, a bank-like protrusion (stirring protrusion 25, engaging protrusion 26) called a hat protrudes substantially in parallel with the rotation axis direction of the rotating drum 4 and rotates. Sometimes, the object to be cleaned in the rotating drum 4 is configured to engage with the protrusion and stir. Specifically, as shown in FIG. 3A, a plurality of stirring protrusions 25 and engaging protrusions 26 having different cross-sectional shapes when viewed from the rotation axis direction are fixed (two in this embodiment, respectively). The protrusions 25 and 26 extend along the rotation axis direction of the rotary drum 4. Further, the agitation protrusions 25 and the engagement protrusions 26 are alternately arranged in the rotation direction of the rotary drum 4 and arranged at equal intervals, and the engagement protrusions 26 are positioned between the adjacent agitation protrusions 25.

  As shown in FIG. 3B, the stirring protrusion 25 is a protrusion having a substantially unequal triangular cross section when viewed from the rotational axis direction, and the forward rotation direction of the rotating drum 4 (in this embodiment, FIG. The first stirring inclined surface 25a facing the clockwise direction indicated by the arrow R1 in a) and (b), and the reverse direction (in this embodiment, the counterclockwise direction indicated by the arrow R2 in FIGS. 3A and 3B) ) And the second stirring inclined surface 25b. Further, the first inclination angle θ1 formed by the first stirring inclined surface 25a and the inner peripheral surface of the rotating drum 4 is greater than the second inclination angle θ2 formed by the second stirring inclined surface 25b and the inner peripheral surface of the rotating drum 4. It is set small.

  As shown in FIG. 3A, the engagement protrusion 26 is a protrusion having a substantially isosceles triangular cross section when viewed from the rotation axis direction, and is a forward-side engagement inclined surface (in other words, facing the normal rotation direction R1). And an engaging inclined surface 26a facing the second stirring inclined surface 25b of the stirring protrusion 25 and a reverse engaging inclined surface facing the reverse rotation direction R2 (in other words, facing the first stirring inclined surface 25a of the stirring protrusion 25). Engaging inclined surface) 26b. The engagement inclination angle θ3 formed by each of the engagement inclination surfaces 26a and 26b and the inner peripheral surface of the rotary drum 4 is larger than the first inclination angle θ1 of the stirring protrusion 25 and smaller than the second inclination angle θ2. It is set.

  In the rotating drum 4 having such a configuration, when the object to be cleaned is rotated while being stored, the object to be cleaned is engaged with the stirring protrusion 25 and the engaging protrusion 26 and is stirred in the rotating drum 4. When the rotating drum 4 is rotated in the forward rotation direction R1, the rising stirring protrusion 25 engages and lifts the article to be washed on the upward first stirring inclined surface 25a. On the other hand, when the rotating drum 4 is rotated in the reverse rotation direction R2, the ascending stirring protrusion 25 engages and lifts the article to be washed on the upward second stirring inclined surface 25b. Here, since the first inclination angle θ1 is set to be smaller than the second inclination angle θ2, the object to be washed engaged on the first agitation inclined surface 25a of the agitation protrusion 25 when rotating in the normal rotation direction R1. When the object rotates in the reverse rotation direction R <b> 2, the object is more easily slipped off than the object being engaged on the second stirring inclined surface 25 b of the stirring protrusion 25. Thereby, when the rotating drum 4 rotates in the forward rotation direction R1, the lift of the object to be cleaned in the rotating drum 4 becomes lower than when the rotating drum 4 rotates in the reverse rotation direction R2, and the object to be cleaned becomes the inner peripheral surface of the rotating drum 4. Or the impact when struck against the surface of the washing water is weakened. Therefore, by changing the rotation direction of the rotating drum 4, it is possible to adjust the force that the article to be washed receives in the rotating drum 4.

  In the washing machine 1, when execution of laundry cleaning is operated on the operation panel 6, washing and dewatering are performed by rotating the rotating drum 4 in the forward rotation direction R1 or rotating in the reverse rotation direction R2. When the execution of the wet cleaning (specifically, the wet cleaning that suppresses the force applied to the object to be washed more than the laundry cleaning) is operated, the rotating operation of the rotating drum 4 in the forward rotation direction R1 and the reverse rotation direction R2 are performed. The combination with the rotation operation is different from the laundry cleaning so that washing and dehydration are performed.

  An operation panel 6 provided in the upper part of the front surface of the housing 2 is a horizontally long panel that displays an operation related to the operation of the washing machine 1 and information related to the operation of the washing machine 1. Specifically, as shown in FIG. 4, a display unit 30 that displays an execution state (execution elapsed time, temperature in the shell 3, etc.) of washing and dehydration, and wet cleaning that is a first execution mode of washing in the washing machine 1. First washing setting operation unit 31 for setting execution, second washing setting operation unit 32 for setting execution of laundry cleaning as a second execution mode of washing, start button 33 for starting operation of washing machine 1, washing machine 1 The stop button 34 etc. which stop driving | operation of are provided. A display unit 30, a start button 33, and a stop button 34 are disposed between the first laundry setting operation unit 31 and the second laundry setting operation unit 32, and the first laundry setting operation unit 31 and the second laundry setting operation are arranged. The operation unit 32 is spaced left and right. Thereby, the selection mistake (erroneous operation) of the operation part which should be operated when performing washing suitable for a to-be-washed object can be reduced. Each of the laundry setting operation units 31 and 32 includes a plurality of setting buttons. For each setting button, the rotation time and the rotation speed of the rotating drum 4, the supply set amount of washing water and detergent necessary for washing, and the like. The washing conditions are set differently. Then, the operator is configured to select and operate an appropriate washing condition setting button in consideration of the state of the material to be washed and the state of dirt before the washing machine 1 is operated. In addition, in order to prevent erroneous operation, the color and light emission of the operation unit may be different on the left and right to improve discrimination.

  Further, the washing machine 1 has a configuration in which the washing water stored in the shell 3 is drawn out and contains a detergent and fine bubbles (for example, microbubbles, nanobubbles, and other fine bubbles), and returned to the shell 3 again. I have. More specifically, as shown in FIGS. 1 and 2, a washing water circulation channel (washing fluid circulation flow) for supplying washing water discharged from the shell 3 and the rotating drum 4 again into the shell 3 and the rotating drum 4. Path) 41, a detergent supply device 42 for supplying detergent to the washing water returned to the inside of the shell 3 and the rotating drum 4 through the washing water circulation passage 41, and a fine bubble generating device 43 containing fine bubbles. The detergent supply device 42 and the fine bubble generating device 43 are arranged on the side of the housing 2.

  As shown in FIG. 2, the washing water circulation channel 41 communicates the upstream end of the washing water circulation channel 41 to the upstream side of the drain valve 12a in the drain pipe 12, and in the middle of the washing water circulation channel 41, An introduction valve 46, a detergent supply device 42, and a fine bubble generation device 43 are arranged in this order from the upstream side. Then, a supply port 47 (specifically, a supply port 47 for supplying wash water from the wash water circulation channel 41 into the shell 3 and the rotary drum 4) serving as the downstream end of the wash water circulation channel 41 is connected to the sleeve portion of the shell 3. 16 is opened below the surface of the washing water stored in the shell 3 (inside the rotating drum 4) and faces the washing object inlet 18 of the rotating drum 4. Therefore, when the washing water in the rotating drum 4 is introduced into the washing water circulation passage 41 from the bottom of the shell 3 through the through hole, the washing water is introduced into the introduction valve 46, the detergent supply device 42, and the fine bubble generation device 43. The liquid is discharged from the supply port 47 through most of it, and most of it returns to the rotary drum 4 through the sleeve portion 16 and the washing object input port 18.

  The detergent supply device 42 includes a detergent mixing tank 42a that communicates with the washing water circulation passage 41 and through which washing water can pass, and a detergent charging pipe 42b that loads the detergent into the detergent mixing tank 42a. The detergent charging pipe 42b has a detergent storage tank for storing the detergent in advance, and a storage amount of the detergent stored in the detergent storage tank and supplied to the shell 3 (inside the rotating drum 4). A detergent storage detection sensor capable of detecting the amount) and a detergent delivery pump (both not shown) for delivering the detergent from the detergent storage tank to the detergent charging pipe 42b are connected. The detergent delivery pump can be driven based on a signal from the control device 22, and information on the amount of detergent that can be supplied detected by the detergent storage detection sensor can be transmitted to the control device 22.

  The fine bubble generating device 43 includes an air supply pipe 43a for supplying air into the wash water, a circulation pump 43b for sending the wash water in a gas-liquid mixed state containing air, and the wash water sent from the circulation pump 43b. A pressurizing tank 43c for pressurizing the water, and releasing the pressurized state by discharging the washing water in the gas-liquid mixed state pressurized in the pressurizing tank 43c to the downstream side of the washing water circulation channel 41, It is comprised so that a fine bubble may be generated in wash water.

  As shown in FIG. 5, the control device 22 that controls the washing machine 1 is composed of, for example, a microcomputer including a CPU, a ROM, a RAM, and the like. Control performed through a plurality of set processes is executed. The control panel 6 receives an input signal from the water level sensor 49 for detecting the water level in the shell 3 (in the rotary drum 4), the detergent storage detection sensor of the detergent supply device 42, etc., and opens and closes the water supply valve 11a. It controls the opening / closing operation of the drain valve 12a, the driving of the drum driving motor 21, the driving of the detergent delivery pump of the detergent supply device 42, the driving of the fine bubble generating device 43, the display operation of the operation panel 6, and the like. In controlling the drum driving motor 21, the drum driving motor 21 is driven by transmitting control signals for the rotation direction, the rotation speed, and the rotation acceleration to the motor inverter 50, and a motor torque value signal is transmitted from the motor inverter 50. Is received and the load applied to the drum drive motor 21 is grasped.

Next, the operation of the washing machine 1, particularly the operation in the wet cleaning process will be described.
First, when the operator turns on the power of the washing machine 1, the control device 22 executes an initialization process for the control system of the washing machine 1. Next, the operator opens the opening / closing door 5 to open the opening 15 of the shell 3 and the washing object inlet 18 of the rotating drum 4, and to put the washing object such as clothes into the rotating drum 4. 5 is closed, the first washing setting operation unit 31 is operated to set the washing condition (course) for wet cleaning. Here, the display unit 30, the start button 33, and the stop button 34 are arranged between the first washing setting operation unit 31 for wet cleaning and the second laundry setting operation unit 32 for laundry cleaning, so that the first Since the laundry setting operation unit 31 and the second laundry setting operation unit 32 are separated from each other, it is inconvenient to select the setting for laundry cleaning by mistake, in other words, to be selected. Inconvenience of washing by rotating the rotating drum 4 in an unsuitable manner for washing (operation that applies force to the washing object rather than wet cleaning), and consequently washing the washing object with excessive force Can be avoided in advance.

  When the operator turns on the start button 33 after the wet cleaning conditions are set, the control device 22 receives the signal from the start button 33 and then supplies the detergent from the detergent storage detection sensor of the detergent supply device 42. Receive as much information as possible. Then, the amount of detergent that can be supplied is compared with the set amount of detergent that is set in advance as the selected wet cleaning condition. If the amount that can be supplied is larger than the set amount of supply, the rotating drum 4 is rotated. And allowing the laundry to be performed. On the other hand, when the amount is less than the set supply amount, the rotating drum 4 is rotated and the washing is restricted, and the display unit 30 or the like is notified of the lack of detergent to prompt the operator to replenish the detergent. As a result, it is possible to avoid washing in a state where the detergent is insufficient.

  If it is confirmed that the detergent can be supplied without running out and the execution of the washing is permitted, the control device 22 starts a cleaning process which is an initial process of the wet cleaning process. In the washing process, as shown in FIG. 6, the water supply valve 11a is opened to supply a predetermined amount of washing water from the water supply pipe 11 into the shell 3, and the washing water in the shell 3 reaches a preset storage amount. Is detected by the water level sensor 49, the water supply valve 11a is closed to stop the supply of the washing water. Next, the detergent supply device 42 and the fine bubble generating device 43 are driven, and the washing water in the shell 3 is introduced into the washing water circulation channel 41 by the circulation pump 43b of the fine bubble generating device 43, and the washing water circulation channel 41 is also introduced. The washing water passing through the container is made to contain detergent and fine bubbles and returned to the shell 3 and the rotating drum 4. At this time, the supply port 47 of the washing water circulation passage 41 is opened below the water level of the washing water in the shell 3 (in the rotating drum 4) so as to face the washing object inlet 18 of the rotating drum 4. The fine bubbles in the washing water supplied from the supply port 47 into the rotary drum 4 are struck against the liquid surface in the rotary drum 4, and as a result, the fine bubbles disappear or grow into large bubbles due to the struck impact. Can avoid inconvenience. Furthermore, it is possible to smoothly reach the inside of the rotating drum 4 as compared with the case where fine bubbles are introduced from a small through hole for dehydration.

  If the detergent is included in the circulating washing water up to the set supply amount, the detergent supply device 42 is stopped, while the fine bubble generator 43 is continuously driven to supply fine bubbles into the washing water. The circulation of the washing water is continuously executed, and in this state, a driving signal (specifically, a driving signal based on a condition set by the operation of the first washing setting operation unit 31) is transmitted to the drum driving motor 21 to rotate the drum. 4 is rotated in the forward rotation direction R1. Thus, since the fine bubbles are continuously supplied to the washing water even while the rotating drum 4 is rotating (in other words, while the washing water and the washing object are being stirred), the concentration of the fine bubbles in the washing water is extremely reduced. And the cleaning effect by the fine bubbles (the effect of finely bubbling the detergent with the fine bubbles, or the effect of the fine bubbles themselves adsorbing dirt from the object to be washed) can be maintained. In addition, even if the rotational movement of the rotating drum is suppressed in order to suppress the force applied to the object to be washed during the washing process, the washing water can be sufficiently foamed by the circulation of the washing water containing fine bubbles. You can expect results. Furthermore, since fine bubbles enter between the fibers of the object to be washed to exert a lubricating effect, it is possible to reduce the inconvenience that the fibers are entangled and the cloth shrinks. The shrinkage-suppressing effect is demonstrated in washing. In the present embodiment, as shown in FIG. 6, the rotating drum 4 is rotated several times in the reverse rotation direction R2 in the middle of the rotation in the normal rotation direction R1, and the washing object is excessively moved in the rotating drum 4. Stirring to the extent that no force is applied.

  When the preset rotation of the rotating drum 4 is completed, the drain valve 12a is opened, the washing water in the shell 3 (in the rotating drum 4) is drained, and the cleaning process is completed. Preparation step) and dehydration step (liquid removal step). In the dehydration preparation process, the rotating drum 4 is rotated in the reverse rotation direction R2 and the normal rotation direction R1 so that the article to be washed is attached to the inner peripheral surface of the rotation drum 4. In the dehydration process, the rotation drum 4 is preliminarily rotated in the dehydration rotation direction ( By rotating in the normal rotation direction R1 set as the (liquid removal rotation direction), centrifugal drainage is performed on the object to be washed.

  Specifically, in the dehydration preparation process executed between the cleaning process and the dehydration process, first, the control device 22 continues to stop the drum driving motor 21 from the end of the cleaning process, and the rotating drum 4 Is rotated by the weight of the object to be cleaned, and the object to be cleaned is set in a state of being located in the lower part of the rotary drum 4. Thereafter, as shown in FIGS. 6 and 7, the drum driving motor 21 is driven in this state, and the rotating drum 4 is set to a predetermined reverse rotation time (for example, 1.25 seconds shown in FIG. 6). Over the reverse rotation direction R2 (in other words, the direction opposite to the dehydration rotation direction in the dehydration step), the object to be washed is raised by rotating at a predetermined reverse rotation speed (for example, 20 rpm shown in FIG. 6). Here, when the article to be washed is engaged with the stirring protrusion 25 and rises, the second inclination angle larger than the first inclination angle θ1 is used instead of the first stirring inclination surface 25a inclined at the first inclination angle θ1. Since it engages with the second stirring inclined surface 25 b inclined at θ 2, it is possible to suppress the possibility that the article to be washed slips and falls off the stirring protrusion 25, and consequently the inconvenience that the article to be washed returns to the lower part in the rotary drum 4. it can.

  When the reverse rotation time has elapsed, the control device 22 controls the drum driving motor 21 to rotate the rotating drum 4 in the normal rotation direction (dehydration rotation direction) R1. At this time, not only the driving force of the drum driving motor 21 but also the increased potential energy of the wash object is used to cause the rotating drum 4 to rotate at an acceleration (normal acceleration) during reverse rotation, as shown in FIG. ) At a faster acceleration than the reverse rotation speed, and set to a rotation speed faster than the reverse rotation speed (for example, 66 rpm shown in FIG. 6). By rotating in this manner, centrifugal force is applied to the object to be cleaned in the rotating drum 4 with a relative centrifugal acceleration of 2 G or more, and the object to be cleaned is attached to the inner peripheral surface of the rotating drum 4.

  In addition, if the rotating drum 4 is rapidly accelerated and rotated in the normal rotation direction R1 in a state where the object to be cleaned is engaged with the stirring protrusion 25, the object to be cleaned is moved to the first stirring inclined surface 25a (specifically, the normal rotation direction R1). The first agitating inclined surface 25a) may be slipped. However, even if the article to be washed slips, the engagement protrusion 26 is disposed at the tip, and the forward-side engagement inclined surface 26a (the second agitation of the agitation protrusion 25) on which the object to be washed can be engaged. Since the engagement inclined surface facing the inclined surface 25b is inclined at an engagement inclination angle θ3 larger than the first inclination angle θ1 of the first stirring inclined surface 25a, the object to be washed that has slipped from the stirring protrusion 25 is removed. It can be received by the forward rotation side engaging inclined surface 26a. Therefore, it is possible to suppress the inconvenience that the object to be washed repeatedly moves over the protrusions 25 and 26 and moves violently in the rotating drum 4, and consequently the inconvenience of receiving excessive force in the rotating drum 4. Furthermore, a sufficient centrifugal force can be applied to the article to be washed while being received by the forward-side engagement inclined surface 26 a, and the article to be washed can be sufficiently attached to the inner peripheral surface of the rotating drum 4.

  In this way, the object to be cleaned is attached to the inner peripheral surface of the rotating drum 4 before the dehydration step, so that the object to be cleaned falls from the upper portion of the inner peripheral surface of the rotating drum 4 and directly hits the lower portion of the inner peripheral surface during the dehydration step. Or inconvenience of being struck on another object to be washed. Therefore, it is possible to suppress application of excessive force to the object to be cleaned, and easy wet cleaning is easily performed.

  In the dehydration preparation process, the article to be washed sticks to the inner peripheral surface of the rotating drum 4 and then the process proceeds to the dehydration process. In the dehydration process, as shown in FIG. 7, the control device 22 controls the drum drive motor 21 to accelerate the rotation of the rotating drum 4 at the same normal acceleration as that during the reverse rotation in the dehydration preparation process (FIG. 7B). (Refer to FIG. 7 (a)). As a result, washing water contained in the object to be washed is subjected to centrifugal force and discharged from the through hole to the outside of the rotating drum 4 and further to the outside of the shell 3 through the drain pipe 12. When a preset dehydration time has elapsed, the control device 22 stops the drum drive motor 21 and ends the dehydration process.

  In the dehydration preparation step, centrifugal force is applied to the object to be washed at a relative centrifugal acceleration of 2 G or more. If centrifugal force is applied to attach the object to be washed to the inner peripheral surface of the rotating drum 4, the relative centrifugal force is applied. The acceleration is not limited to 2G or more. For example, depending on the weight of the object to be cleaned and the frictional state between the object to be cleaned and the inner peripheral surface of the rotating drum 4, even when a centrifugal force is applied to the object to be cleaned at a relative centrifugal acceleration smaller than 2G, It is considered that it can be attached to the inner peripheral surface of the rotating drum 4. However, if the relative centrifugal acceleration at the time of applying the centrifugal force is larger than 2G, it is preferable because the object to be cleaned can be easily attached to the inner peripheral surface of the rotating drum 4 without being influenced by the state of the object to be cleaned.

  In the dehydration preparation step of the above embodiment, the rotating drum 4 is rotated in the reverse rotation direction R2 and then rotated in the normal rotation direction R1, and the object to be washed is attached to the inner peripheral surface of the rotating drum 4. It is not limited to. In short, the rotating drum 4 in the dehydration preparation process may be rotated in any manner as long as the object to be washed can be stuck in the rotating drum 4 before the dehydration process. For example, without rotating in the reverse rotation direction R2, only the rotation in the forward rotation direction R1 is performed, and centrifugal force is applied to the object to be cleaned at a relative centrifugal acceleration of 2G or more, so that the object to be cleaned is moved to the inner periphery of the rotating drum 4. It may be attached to the surface. If the object to be washed can be attached to the inner peripheral surface of the rotating drum 4 only by rotating in the normal rotation direction R1, the time required for the dehydration preparation process as much as the rotation of the rotating drum 4 in the reverse rotation direction R2 is not performed. The execution time of wet cleaning can be shortened.

  Furthermore, in the said embodiment, although the spin-drying preparation process was performed between the washing | cleaning process and the spin-drying | dehydration process, and the to-be-washed object was stuck on the internal peripheral surface of the rotating drum 4 in this spin-drying preparatory process, this invention is not limited to this. . In short, it suffices if the article to be washed can be attached to the inner peripheral surface of the rotating drum 4 before centrifugal dehydration. For example, a centrifugal force may be applied to the article to be washed at the start of the dehydration process, and the article to be washed may be attached to the inner peripheral surface of the rotating drum 4.

  By the way, in the said embodiment, although the stirring protrusion 25 and the engagement protrusion 26 are fixed to the cylindrical rotating drum 4, this invention is not limited to this. For example, the stirring projection and the engagement projection are formed by bending a part of the circumferential portion of the rotating drum in the radial direction, and the portion corresponding to the bottom surface of each projection is configured to open outward. May be. When the stirring protrusions and the engaging protrusions are formed in this way, the inner peripheral surface of the rotating drum virtually imagined at the opening of each protrusion is taken as the virtual inner peripheral surface, and the virtual inner peripheral surface and the inclined surface of each protrusion Are defined as the first inclination angle, the second inclination angle, and the engagement inclination angle in the present invention.

  Moreover, in the said embodiment, although the supply port 47 of the washing water circulation flow path 41 was connected to the sleeve part 16, this invention is not limited to this. In short, the connection place of the supply port 47 is not limited as long as the washing water containing fine bubbles can be supplied into the rotating drum 4 without any trouble. For example, the supply port 47 of the washing water circulation passage 41 may be connected to the open / close door 5 so as to face the washing object input port 18 of the rotating drum 4.

  By the way, in the said embodiment, although water was illustrated as a washing liquid used for the washing machine 1, this invention is not limited to this. In the wet cleaning and laundry cleaning, any washing liquid may be used as long as it can be used as a substitute for water. Moreover, although the said embodiment demonstrated and demonstrated the washing machine which can perform a washing process, this invention is not limited to this. For example, the present invention may be applied to a washing / drying machine capable of performing a washing process and a drying process on an object to be washed.

  Furthermore, it should be thought that above-described embodiment is an illustration and restrictive at no points. The present invention is not limited to the above description, but is defined by the scope of the claims, and includes all modifications within the scope and meaning equivalent to the scope of the claims.

  DESCRIPTION OF SYMBOLS 1 ... Washing machine, 2 ... Housing, 3 ... Shell, 4 ... Rotating drum, 4a ... Rotating shaft, 5 ... Opening / closing door, 6 ... Control panel, 11. ..Water supply pipe, 11a ... Water supply valve, 12 ... Drain pipe, 12a ... Drain valve, 15 ... Opening part, 16 ... Sleeve part, 18 ... Washing object inlet, DESCRIPTION OF SYMBOLS 21 ... Drum drive motor, 22 ... Control apparatus, 25 ... Agitation protrusion, 25a ... 1st stirring inclination surface, 25b ... 2nd stirring inclination surface, 26 ... Engagement protrusion , 26a ... forward-side engagement inclined surface, 26b ... reverse-side engagement inclined surface, 30 ... display unit, 31 ... first washing setting operation unit, 32 ... second washing setting Operation unit, 33 ... Start button, 34 ... Stop button, 41 ... Washing water circulation channel, 42 ... Detergent supply device, 42a ... Detergent mixing tank, 42b ... Detergent input tube, 43 ... fine bubble generator, 43a ... air supply pipe, 43b ... circulation pump, 43c ... pressurized tank, 4 ... introducing valve, 47 ... inlet, 49 ... water level sensor, 50 ... motor inverter

Claims (4)

In a washing machine in which a washing shaft and a washing liquid are stored in a rotating drum having a rotating shaft in a horizontal orientation, and washing is performed by rotating the rotating drum.
On the inner peripheral surface of the rotating drum, a plurality of stirring protrusions for stirring the object to be washed are juxtaposed in the rotating direction of the rotating drum,
The stirring protrusion includes a first stirring inclined surface facing the forward rotation direction of the rotating drum and a second stirring inclined surface facing the reverse rotation direction,
The first inclination angle formed by the first stirring inclined surface and the inner peripheral surface of the rotating drum is set to be smaller than the second inclination angle formed by the second stirring inclined surface and the inner peripheral surface of the rotating drum. A washing machine featuring. Between the stirring protrusions adjacent to each other on the inner peripheral surface of the rotating drum, an engaging protrusion that engages with an object to be washed is provided,
The engaging protrusion includes an engaging inclined surface facing the second stirring inclined surface of the stirring protrusion, and an engaging inclination angle formed by the engaging inclined surface and an inner peripheral surface of the rotating drum is the first. The washing machine according to claim 1, wherein the washing machine is set to be larger than an inclination angle. An operation panel for rotating the rotating drum to execute washing;
The operation panel includes a display unit that displays an execution state of washing, a first washing setting operation unit that sets execution of washing in the first execution mode, and a second that is different from the first execution mode. A second laundry setting operation unit for setting execution in an execution mode,
The washing machine according to claim 1 or 2, wherein the display unit is disposed between the first laundry setting operation unit and the second laundry setting operation unit. A control device that controls the execution of washing by rotating the rotating drum; and a detergent supply device that supplies detergent to the washing liquid in the rotating drum,
The detergent supply device can transmit information on the supply amount of detergent that can be supplied into the rotating drum to the control device,
The controller is
When the supply possible amount is larger than a preset supply set amount, it is allowed to execute washing by rotating the rotary drum, and when the supply possible amount is smaller than the detergent supply set amount. The laundry machine according to any one of claims 1 to 3, wherein the laundry is regulated by rotating the rotating drum.

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