JP2006068189A - Washing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To uniformly wash and rinse laundry by promoting the vertical replacement of the laundry in washing and rinsing. <P>SOLUTION: A washing tub 5, in its internal circumferential face, is provided with a single or a plurality of baffles 27 projecting to the internal circumferential side with their inclined at a predetermined angle relative to a rotary shaft CL. In the washing and rinsing operations, this washing machine combines a B water flow repeating left/right inversion of a motor 8 driving a pulsator 7 at a relatively short period for performing regular washing, and a C water flow elongating the ON time of the motor 8 longer than that of the B water flow and suppressing the rotating speed itself low. When the laundry rotates in a predetermined direction on the water flow in the C water flow, the laundry coming into contact with the baffle 27 runs on the baffle 27 and is pushed up along a slope. The laundry positioned in the bottom side in the washing tub 5 is thus lifted to promote the vertical movement of the laundry. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a washing machine, and more particularly to a spiral washing machine in which a pulsator as a stirring blade is disposed on the inner bottom of a bottomed cylindrical washing tub.

  In a general spiral automatic washing machine, a pulsator is rotatably provided at the inner bottom of a bottomed cylindrical washing tub that also serves as a dewatering tub. Then, when the pulsator is driven to rotate while water is stored in the washing tub, a water flow is generated, and the laundry moves on the water flow while the laundry moves, the laundry and the pulsator, and the laundry and the laundry. Washing and washing of the laundry can be achieved by rubbing against the inner wall of the tub or by passing water through the gaps in the fibers of the laundry.

  One of the main problems in such a washing machine is to reduce as much unevenness as possible. For this reason, in this type of conventional washing machine, the rotation of the pulsator is reversed forward and backward in small increments to alternately generate clockwise and counterclockwise water flows. Moreover, since the washing performance tends to be lower on the upper side than on the bottom side in the washing tub, it is necessary to appropriately change the laundry in the washing tub. Therefore, by changing the forward / reverse rotation time of the pulsator, the water flow in the rotational direction is disturbed, thereby generating a water flow in the vertical direction, thereby promoting the replacement of the upper and lower laundry. Yes.

  However, it is difficult to perform upside down replacement while suppressing the tangling of the laundry only by such a conventional method. Also, when the pulsator rotation time is lengthened, a strong water flow is generated, and when the pulsator is reversed, the water flow that travels in the opposite direction collides to produce a large water splash, and the washing machine is opened when the top cover is open. Water may splash around the area. Further, if the rotation time of the pulsator is lengthened in one direction, the laundry is shifted and greatly swung in the washing tub, and the outer tub may come into contact with the inner surface of the housing.

  For these problems, attempts have been made to promote the top-to-bottom swapping of laundry while suppressing water splashing and extreme displacement of the laundry by devising the drive pattern of the motor that rotationally drives the pulsator. (Refer patent document 1 etc.). On the other hand, the shape of the pulsator is devised and a protruding portion inclined on the inner peripheral surface of the washing tub is provided to generate a vertical water flow in the washing tub, thereby facilitating the replacement of the upper and lower laundry. A washing machine is also conventionally known (see Patent Document 2 and the like).

  However, all of these conventional washing machines are basically designed to promote the up-and-down change of the laundry by placing it in the water flow in the up-and-down direction. Therefore, depending on the type and amount of the laundry, the effect of the up-and-down change is not always necessary. May not be fully demonstrated. Therefore, there is a strong demand for a washing machine that can more reliably promote up-and-down change of laundry during washing operation and rinsing operation, and can perform washing and rinsing evenly.

JP 2002-11278 A Japanese Patent Publication No. 3-5197

  The present invention has been made in order to solve such problems, and its main purpose is to promote the movement of laundry up and down more effectively than before, and to eliminate washing unevenness and excessive unevenness. Another object of the present invention is to provide a washing machine capable of exhibiting high washing performance and rinsing performance. Another object of the present invention is to provide a washing machine capable of avoiding large water splashing or excessive swinging of the laundry and the outer tub when the laundry is switched up and down. It is in.

In order to solve the above problems, a first invention comprises a bottomed cylindrical laundry tub for storing laundry therein, and a stirring blade rotatably provided at the inner bottom of the laundry tub. And in the washing machine for washing and washing too much by rotating the stirring blade in a state where water is stored in the washing tub,
In order to contact the laundry moving by the water flow generated in the washing tub by the rotation of the stirring blade and move the laundry so as to be lifted obliquely upward while being placed on the inside, the inner peripheral surface of the washing tub is One or a plurality of baffles having a shape that bulges and extends in a direction oblique to the rotation axis of the stirring blade is provided.

In order to solve the above problems, a second invention comprises a bottomed cylindrical laundry tub for storing laundry therein, a stirring blade rotatably provided at the inner bottom of the laundry tub, and the stirring A washing machine that comprises a drive source that rotates the wings, and performs washing and rinsing of the laundry by rotating the stirring blades in a state where water is stored in the washing tub,
One or a plurality of baffles provided on the inner peripheral surface of the washing tub and extending in a direction oblique to the rotation axis of the stirring blade;
Rotation control means for controlling the drive source so that the stirring blades rotate alternately in the left-right direction during washing operation and rinsing operation, wherein the on-time of the drive source is relatively short and the rotation speed is relatively A rotation control means for performing a control combining a first drive mode set high and a second drive mode set with a relatively long ON time of the drive source and a relatively low rotation speed;
It is characterized by having.

  In the washing machines according to the first and second inventions, when the agitating blade is rotated in a predetermined direction, the water stored in the washing tub basically has a water flow that rotates around its rotation axis. It happens and the laundry moves on this stream. The baffle provided on the inner peripheral surface of the washing tub is swelled inward and extending obliquely with respect to the rotation axis of the stirring blade. In this case, however, it is in direct contact with the laundry moving in the vicinity of the inner peripheral surface of the washing tub, and in cooperation with the water flow, the laundry is inclined upward. It has the effect | action which moves so that it may rise along.

  That is, when the agitating blade is rotated in a direction in which the water flow contacting the baffle is upward, the laundry that is located near the inner peripheral surface of the washing tub is moved to the baffle among the laundry that moves on the water flow. Abut. When the laundry is further pushed by the momentum of the water flow, the laundry rides on the baffle and rises along the upward slope. The laundry is then released from the baffle when it reaches the top of the baffle or when the direction of water flow is reversed. Therefore, the laundry that was in a relatively low position in the washing tub is lifted to a higher position by the baffle, and the upper and lower relations are switched on the laundry that was on the top just before that.

  In the washing machine according to the first and second inventions, the upper and lower parts of the laundry are frequently exchanged in this way, so that it is possible to eliminate uneven washing and excessive unevenness, and to wash and rinse the entire laundry evenly. Also, even when it is difficult to change the top and bottom of the laundry by the water flow alone, especially when the amount of laundry is large or there is heavy laundry, the laundry is surely washed by lifting the laundry directly. The top and bottom of the object can be exchanged, and high cleaning performance and rinsing performance can be exhibited.

  In the washing machine according to the second aspect of the present invention, the rotation control means includes a first drive mode in which the on-time of the drive source is set to be relatively short and the rotation speed is set to be relatively high during the washing operation and the rinsing operation; In combination with the second drive mode in which the on-time is relatively long and the rotational speed is relatively low, the drive source is controlled so that the stirring blades rotate alternately in the left-right direction. As described above, in the washing machine according to the second aspect of the present invention, the laundry is moved on the baffle and moves upward along the inclination, so that the rotation of the stirring blade is stopped during that time or the stirring blade is stopped. If the direction of the water is reversed and the direction of the water flow is changed, the laundry cannot be sufficiently lifted up. On the other hand, in the second drive mode, since the on-time of the drive source is set to be relatively long, the water flow in the direction of pushing up on the baffle continues for a certain length of time, and the laundry is sufficiently lifted up and down. Replacement can be achieved reliably.

  In addition, when the driving source is on for a long time, the water flow that hits the laundry that is raised on the surface of the water may cause a large amount of water splash. However, in the second driving mode, the driving source has a relatively long on time, Since the rotational speed is kept relatively low, the momentum of the water flow is suppressed by that much, and the occurrence of large water splashes can be prevented. Furthermore, the extreme displacement of the laundry in the washing tub is unlikely to occur, so that the washing tub and the outer tub that houses the washing tub are prevented from greatly shaking, and the outer tub is prevented from contacting the inner surface of the housing. be able to.

  In the washing machine according to the second aspect of the present invention, in the second drive mode, the rotation control means causes a water flow generated in the washing tub to rotate in the direction along the baffle by rotation of the stirring blade. The on-time of the drive source is relatively long and the rotation speed is relatively low, and the on-time of the drive source when rotating the stirring blade in the opposite direction is relatively short and the rotation speed is It is preferable to make the structure relatively high.

  According to this configuration, even in the second driving mode, when the water flow is generated in the direction in which the laundry can be lifted upward by the action of the baffle, the on-time of the drive source (that is, the water flow is reduced). (Duration time) is relatively long, and the on-time of the drive source is relatively short when the water flow is generated in a direction in which the action of lifting the laundry upward does not occur. Therefore, for example, if the operation time is constant, there is an increased chance of changing the laundry up and down using the baffle, and the laundry in the washing tub is also sufficiently changed in the vertical direction to make washing even easier. Contributes to the elimination of unevenness.

  Also, the ease of changing the top and bottom of the laundry varies depending on the amount of laundry stored in the laundry tub. Therefore, in the washing machine according to the second aspect of the invention, more preferably, the washing machine further includes load amount detection means for detecting the amount of the laundry stored in the washing tub, and the rotation control means is in the second drive mode, The driving source when a water flow generated in the washing tub is generated in the direction of raising the laundry along the baffle by at least the rotation of the stirring blade according to the amount of the laundry detected by the load amount detection means It is good to set it as the structure which changes either one or both of ON time of this, or rotational speed.

  Specifically, the smaller the amount of laundry, the stronger the water flow tends to make the laundry easier to move, so the smaller the amount of laundry, the shorter the on-time of the drive source, the lower the rotational speed, Or both. According to this configuration, when the amount of the laundry is small, it is possible to prevent the momentum of the water flow from becoming too strong to easily cause a large water splash or to easily cause the extreme deviation of the laundry. .

  In the washing machines according to the first and second inventions, the installation position and installation conditions of the baffle greatly affect the effect of changing the laundry up and down. Therefore, it is desirable to appropriately determine the installation position and installation conditions of the baffle.

  For example, the baffle is preferably provided at a position lower than the highest water level line set in the washing tub during the washing operation or the reservoir rinsing operation. As a result, the baffle is completely submerged in the state where water is stored to the highest position in the washing tub at the time of washing and rinsing, so that the water flow hits the baffle protruding above the water surface and a large water splash occurs. Can be prevented.

  Further, it is preferable that a plurality of baffles be provided around the rotation axis in the washing tub at substantially equal angular intervals. Thereby, since the up-and-down change of the different laundry in a several site | part is achieved simultaneously, it becomes easy to change the whole laundry up and down uniformly.

  Furthermore, if the direction of baffle extension is close to a right angle to the water flow, the laundry will not easily rise on the baffle even if pushed by the water flow, and the baffle will hinder the movement of the laundry on the whole. It becomes easy to stay in. On the contrary, if the baffle extending direction is almost parallel to the water flow, the amount of lifting and moving of the laundry by the baffle cannot be secured in the first place, and the effect of changing the laundry up and down cannot be obtained.

  For this reason, the baffle is preferably inclined at an angle in the range of about 30 to 60 ° with respect to the plane orthogonal to the rotation axis. With such a configuration, the baffle does not become a major obstacle to the movement of the laundry in the washing tub, and the effect of changing the laundry up and down can be sufficiently exhibited.

  Hereinafter, an embodiment of a washing machine according to the present invention will be described with reference to the drawings. FIG. 1 is a schematic side sectional view showing the configuration of the washing machine of this embodiment.

  A housing 1 that forms the outer shape of the washing machine has a substantially rectangular parallelepiped box shape as a whole, and a bottomed cylindrical outer tub 2 is provided with a front suspension rod 3 and a rear suspension rod 4 (1 in FIG. 1 each). Each of the books is visible, but there are actually two each). Corresponding to the protrusion of the outer tub 2 toward the upper front, the upper portion of the front surface of the housing 1 also protrudes. Inside the outer tub 2, a washing tub 5 also serving as a dewatering tub having a large number of water passage holes 5a on a peripheral wall is rotatably supported around a main shaft 6 inclined forward by about 10 °. In addition, a pulsator 7 which is a stirring blade in the present invention for stirring laundry is disposed at the bottom of the washing tub 5, and on the extension of the main shaft 6 is a direct drive as a drive source in the present invention. A motor 8 and a clutch 9 for switching power are provided. The clutch 9 rotates the pulsator 7 only in one direction or both directions mainly during the washing operation and the rinsing operation by the operation of the torque motor 10 attached under the bottom surface of the outer tub 2, and the washing tub 5 and the pulsator 7 are rotated during the dehydration operation. Perform mechanical switching to rotate in one direction.

  In the upper rear of the outer tub 2, there is provided a water injection port 11 provided with a detergent container 12 for storing a detergent and a soft finish so that the detergent container 12 can be pulled out. An end portion of the water supply pipe 14 protrudes from the rear upper surface of the housing 1 to form a water supply port 13, and a hose connected to an external water tap or the like is connected to the water supply port 13. The water supply pipe 14 is connected to the inlets of the main water supply valve 15a and the finishing agent water supply valve 15b included in the water supply valve unit 15, and the outlets of the main water supply valve 15a and the finishing agent water supply valve 15b are independently connected to the water inlet 11. It is connected. When the main water supply valve 15a is opened, tap water supplied from the water tap flows into the detergent container in the detergent container 12, while when the finish agent water supply valve 15b is opened, the finish agent is stored in the detergent container 12. Water flows into the section, and in either case, water is spouted from the water inlet 11 toward the lower outer tub 2. Further, a bath water pump 16 is disposed in the vicinity of the water supply valve unit 15, and the bath water pump 16 is in a state where the end (not shown) of the bath water suction hose 17 of the bath water pump 16 is immersed in the bath water. When is operated, bath water sucked through the bath water suction hose 17 is supplied to the water inlet 11.

  A drainage opening 18 is formed at the front end of the bottom of the outer tub 2, that is, the lowest part. One end of a drainage pipe 19 is connected to the drainage opening 18, and the drainage pipe 19 is opened and closed by a drainage valve 20. The other end of the drain pipe 19 reaches a drain port (not shown) formed on the side surface of the bottom pedestal 21 and is connected to an external drain groove through a drainage hose that can stand upright. The opening / closing operation of the drain valve 20 is also linked to the operation of the torque motor 10 in the same manner as the connection switching operation of the clutch 9. That is, by driving the torque motor 10, the drain valve 20 is opened when the washing tub 5 and the pulsator 7 are integrally rotated by the clutch 9, and the clutch 9 establishes a connection between the washing tub 5 and the pulsator 7. When the connection is released and only the pulsator 7 is rotated (rotation of the washing tub 5 is restricted by the band brake), the drain valve 20 is closed. Although not shown, an air trap is formed at the bottom of the outer tub 2, and the other end of the air hose connected to the air trap is connected to a water level sensor 22 disposed at the top.

  An annular balance ring 24 for preventing vibration is attached to the upper end of the washing tub 5, and a circulation water channel 25 extending substantially vertically from the bottom of the washing tub 5 to immediately below the balance ring 24 bulges along the inner wall of the washing tub 5. Is formed. A lint filter 26 for collecting dust such as yarn waste mixed in the washing water is detachably provided in the upper opening of the circulation water channel 25. When the pulsator 7 is rotated in a state where a predetermined amount of water is stored in the washing tub 5, it is provided on the bottom surface of the washing tub 5 by the pumping action of the back blades radially formed on the lower surface of the pulsator 7. Water between the bottom surface of the washing tub 5 and the bottom surface of the outer tub 2 is sucked up through the water flow opening 5b. The sucked-up water is pushed out to the outer peripheral side of the pulsator 7 with a strong pressure, enters from the lower end opening of the circulating water passage 25, rises in the water passage 25, and is discharged into the washing tub 5 from the upper opening. Further, the water in the washing tub 5 goes out to the outer tub 2 side through the water passage hole 5a and circulates.

  On the inner peripheral surface of the washing tub 5, a baffle 27, which is characteristic of the washing machine of this embodiment, is attached for moving the laundry upward. As will be described later, in this example, there are three baffles 27, but all of them are lower than the water level line Lmax indicating the highest water level for washing and rinsing. This is to prevent the baffle 27 from protruding above the water surface when the stored water level in the washing tub 5 is the highest.

  The mounting structure of the baffle 27 will be described in detail with reference to FIGS. 2 is a plan view in which the inner peripheral surface of the washing tub 5 is cut and developed along a line AA ′ parallel to the rotation axis CL of the pulsator 7 (which is also the rotation axis of the washing tub 5), and FIG. FIG. The three baffles 27 are provided on the inner peripheral surface of the washing tub 5 at substantially equal angular intervals (about 120 °), and are attached to the surface orthogonal to the rotation axis CL by an inclination angle θ. . In this example, the inclination angle θ is about 45 °. When the inclination angle θ exceeds 60 °, the baffle 27 becomes an obstacle to the movement of the laundry, and the laundry tends to stay in the washing tub 5. On the other hand, when the inclination angle θ is smaller than 30 °, the effect of lifting the laundry is reduced. Therefore, the inclination angle is preferably set within a range of about 30 to 60 °.

  When the pulsator 7 is rotated in a predetermined direction with water stored in the washing tub 5 (strictly, the outer tub 2), the water flow in the direction indicated by the arrow in FIG. appear. Since the laundry moves on this water flow, it can be understood that the direction of movement of the laundry is the same as the direction of the water flow. At that time, the laundry that moves near the inner peripheral surface of the washing tub 5 abuts on the baffle 27 as shown in FIG. 2, rides on the baffle 27, and moves along the upward inclination. That is, the laundry that has contacted the baffle 27 at a relatively low position in the washing tub 5 is lifted to a relatively high position in the washing tub 5 by the cooperative action of the baffle 27 and the water flow. As a result, the replacement of the laundry in the laundry tub 5 in the vertical direction can be actively promoted, and the entire laundry can be appropriately stirred. This is the basic operation of the baffle 27 in the washing machine of this embodiment.

  FIG. 4 is an electric system configuration diagram of a main part of the washing machine of this embodiment. At the center of control is a control unit 40 that includes a CPU, RAM, ROM, timer, and the like. The ROM stores in advance a program for executing various controls and processes as will be described later. The controller 40 receives a key input signal from an operation unit 43 including a plurality of operation keys such as a start key 43a, a course selection key 43b, a bath water key 43c, and a reservation key 43d, and the lid switch 45 interlocks with opening and closing of the upper lid. As the lid opening / closing signal, a water level detection signal corresponding to the water level of water stored in the outer tub 2 is input from the water level sensor 22. And the control part 40 receives the output of the rotation angle sensor 44 which outputs the signal according to rotation of the motor 8, controls rotation of the motor 8 via the inverter drive part 41, and via the load drive part 42, The operation of the torque motor 10 that controls the opening / closing operation of the main water supply valve 15a, the finishing agent water supply valve 15b, the bath water pump 16, and the drain valve 20 and the connection / disconnection operation of the clutch 9 is controlled. Further, the control unit 40 causes the display unit 46 to display a key input acceptance state, a laundry progress state, and the like, and causes the buzzer 47 to sound as necessary. The control part 40, the inverter drive part 41, and the rotation angle sensor 44 correspond to the rotation control means according to the present invention.

  FIG. 5 is a flowchart showing the flow of a standard washing process in the washing machine of this embodiment. The operation of this washing machine will be schematically described with reference to FIG.

  When the user puts the laundry in the washing tub 5 and sets the predetermined course and presses the start key 43a, the amount of laundry put into the washing tub 5, that is, the load amount is detected before water supply. (Step S1). Specifically, the control unit 40 operates the motor 8 to rotate the pulsator 7 in a predetermined direction for a short time, and detects the load amount according to the time during which inertial rotation is continued. In this case, the control part 40, the inverter drive part 41, and the rotation angle sensor 44 are equivalent to the load detection means in this invention. Of course, the load amount detection is not limited to this method, and any method may be used. In accordance with the load amount thus detected, the water level at the time of post-washing and rinsing is determined. A display indicating the amount of detergent corresponding to the set water level is displayed on the display unit 46, and the user inputs an appropriate amount of detergent according to this display.

  When substantial washing is started, the control unit 40 opens the main water supply valve 15 a via the load driving unit 42. The water level detection signal from the water level sensor 22 supplies water until the set water level determined as described above is reached in the washing tub 5, and then the pulsator 7 is rotated at a predetermined speed and forward and backward to wash. Execute (Step S2). When such washing is completed, the water in the washing tub 5 is discharged by opening the drain valve 20, and intermediate dehydration is performed by rotating the washing tub 5 and the pulsator 7 together at high speed (step S3). By this intermediate dehydration, the detergent water soaked in the laundry is scattered and removed.

  Next, dehydration rinsing is performed as the first rinse (step S4). Dehydration rinsing causes the laundry to absorb clean water by allowing water to fall from the water inlet 11 into the laundry while rotating the washing tub 5 at a relatively low speed, and soaks in the laundry instead. It tries to push out the detergent water. And after fully making a laundry contain water, intermediate | middle dehydration is performed by the process of step S5 similar to step S3, and the water which soaked into the laundry is scattered.

  Next, a second rinse, that is, a final rinse is performed (step S6). That is, water is supplied to the set water level in the washing tub 5, and the laundry is agitated in the stored water by rotating the pulsator 7 as in step S2. At the time of final rinsing water supply, the finish water supply valve 15b is opened together with the main water supply valve 15a, and the soft finish contained in the detergent container 12 is put into the washing tub 5. When the reservoir rinsing is completed, the water in the washing tub 5 is discharged, and the final dehydration is executed by rotating the washing tub 5 and the pulsator 7 together at a high speed in the same manner as the intermediate dehydration (step S7).

  Note that the above steps are standard, and depending on the type of laundry, for example, instead of dehydrating and rinsing, rinsing or pouring water can be performed, or the number of dehydration rinsing or rinsing rinses can be increased. It is possible to change as appropriate.

  As described above, in the washing machine of the present embodiment, the upper and lower of the laundry can be promoted using the baffle 27 at the time of washing and rinsing, and the control method of the motor 8 at that time will be described in detail. In the following, the case of washing will be described, but the same applies to the case of rinsing.

  In the washing machine of the present embodiment, the washing operation is roughly performed by combining two types of water flow patterns called B water flow corresponding to the first drive mode in the present invention and C water flow corresponding to the second drive mode in the present invention. Is running. FIG. 6 is a diagram showing a transition state of a schematic water flow pattern from the start of driving of the pulsator 7 to the end of driving during a washing operation, FIG. 7 is a diagram showing a basic drive pattern of one cycle of motor control in the washing machine, 8 is a timing chart showing a detailed relationship between the passage of time from the start of driving of the pulsator 7 to the end of driving and the rotational speed of the motor 8 during the washing operation.

  The basis of the washing operation is the B water flow, and as shown in FIG. 6, the B water flow is first performed for Tb time, and then the C water flow is performed for Tc time to promote the up-and-down change of the laundry. After that, the B water flow is executed again, and finally, the unwinding water flow for promoting the loosening of the intertwined laundry is executed. For example, Tb can be about 2 minutes and Tc can be about 2 minutes.

  As shown in FIG. 7, the basic drive pattern of motor control is that the motor 8 is turned on (that is, energized) by T1on in the left direction, the motor 8 is turned off (that is, energized) by T1off, and then this time. The motor 8 is turned on (that is, energized) by T2on in the right direction, and then the motor 8 is turned off (that is, energization is stopped) by T2off. This is a one-cycle driving pattern, and the rotation speed when the motor 8 is turned on in the left and right directions can be set as appropriate. 8 illustrates the rotational speed of the motor 8. In the washing machine of this embodiment, the reduction ratio of the rotational speed of the pulsator 7 to the rotational speed of the motor 8 is 6.4. When the rotation speed of the motor 8 is 660 rpm, the rotation speed of the pulsator 7 is about 103 rpm.

  As shown in FIG. 8, in the B water flow, T1on / T1off and T2on / T2off are both 1.2 seconds / 0.5 seconds, and the rotation speed of the motor 8 at that time is 660 rpm. On the other hand, in the C water flow, T1on / T1off and T2on / T2off are both 3.0 seconds / 0.5 seconds, and the rotation speed of the motor 8 at that time is 600 rpm. That is, in the C water flow, the rotation speed is suppressed to a low value instead of extending the ON time (T1on, T2on) of the motor 8 compared to the B water flow. This is due to the following reason.

  The main purpose of the C water flow period is to promote the interchange of the laundry up and down. The interchange of the upper and lower sides of the laundry is appropriately achieved by the laundry that has run on the baffle 27 rising up along the inclination as described above. Since it takes a certain amount of time for the laundry to move from the lower end to the upper end of the baffle 27, if the water flow stops or reverses during this time, the baffle 27 is not fully lifted before the laundry is fully raised. It will be far from the top and the laundry cannot be swapped up and down sufficiently. Therefore, in the C water flow period, the duration time of the water flow in the same direction is increased by setting the motor 8 on time to 3 seconds, which is appropriately longer than the B water flow period (twice or more in this example). 27 is used so that the upper and lower sides of the laundry are sufficiently replaced.

  However, if the on time of the motor 8 is long, a strong water flow is generated, and the outer tub 2 swings and becomes easily in contact with the inner surface of the housing 1 because the laundry is extremely shifted in the washing tub 5 and becomes unbalanced. . In addition, the water splash hits the laundry raised above the surface of the water and the water splash increases. Therefore, in order to suppress the strength of the water flow, the rotation speed of the motor 8 is 600 rpm, which is about 10% lower than the B water flow. By this, while suppressing the large rocking | fluctuation of the outer tub 2 so that it contacts the housing 1 and suppressing a big water splash, it promotes the change of the upper and lower sides of the laundry effectively, and eliminates the unevenness of washing and excessive unevenness. Can do.

  FIG. 9 is a timing chart in the case where a rotational drive pattern different from that in FIG. As described above, the operation of changing the laundry up and down using the baffle 27 is effective only when the water flow in the washing tub 5 is rotating clockwise, and when the water flow in the washing tub 5 is rotating counterclockwise. There is little meaning. That is, in the example shown in FIG. 8, the ON time of the motor 8 is made longer than that during the B water flow in both the left and right rotations in the C water flow. is there. Therefore, in the example shown in FIG. 9, during the C water flow, the ON time of the motor 8 (that is, T2on) is set longer than that during the B water flow only during the right rotation period, and the rotation speed is kept lower than during the B water flow. On the other hand, during the counterclockwise rotation period, the same parameters as for the B water flow are adopted. As a result, if the execution time Tc of the C water flow is the same, the number of executions of the right rotation effective for the up-and-down switching can be increased, so that the laundry can be further switched up and down.

  In the above description, the amount of laundry stored in the washing tub 5 (load amount) is not taken into consideration, but the water flow is generally stronger as the load amount is smaller even with the same motor drive pattern. Therefore, problems such as water splashing easily occur. In particular, when the load is small, the stored water level in the washing tub 5 is low, but the upper part of the baffle 27 protrudes above the water surface, so that a large water flow hits the baffle 27 protruding above the water surface. Water splash is likely to occur. Therefore, according to the load amount, the smaller the load amount, the shorter the on-time (at least T2on) of the motor 8 at the time of the C water flow or the further reduction of the rotation speed may be performed. As a result, water splash can be prevented and swinging of the outer tub 2 can be suppressed.

  Next, another feature of the washing machine of this embodiment will be described. In this washing machine, it is possible to set a reserved operation as in the case of a conventional washing machine. Specifically, when a reserved operation time (after ○ hour) is set, the time is shown in FIG. The operation is automatically executed so that the series of washing operations just ends. On the other hand, the washing machine includes a bath water pump 16, and a bath water key 43 c for selecting whether or not to use bath water for washing is provided in the operation unit 43. Conventionally, it has been possible to set the use of bath water at the time of reserved operation, but the supply of bath water by the bath water pump 16 is a point in time that is a predetermined estimated washing execution time from the time set at the reserved operation. Was configured to be started.

  However, such a configuration has the following problems. That is, in the case of reserved driving, setting is often performed on the night of the previous day so that driving ends in the morning of the next day. In general, since the user often takes a bath at night, when using the remaining hot water in the bath, the temperature of the bath water has already dropped at the time of supplying water. The use of hot water with a certain temperature higher than the use of cold water promotes the dissolution of the detergent and the soiling of the laundry is better, but as mentioned above, the temperature of the hot water decreases at the time of bath water supply. Therefore, improvement in cleaning performance due to temperature cannot be expected, and only the benefits of water saving using bath water can be obtained. Further, in this case, the remaining hot water of the bath is left in the state of being stored in the bathtub overnight, and the inside of the bathroom is maintained in a high humidity state, so that mold and the like are easily generated. Therefore, there is a problem that the user who cares about such hygiene cannot use the bath water in the reserved operation.

In order to solve such a problem, the washing machine of the present embodiment can select a dedicated driving course different from the conventional one when the reserved operation and the use of bath water are desired. This will be described below. Normally, one of the following four operations can be selected by a combination of on / off of the bath water key 43c and the reservation key 43d.
(1) Bath water operation: Only the bath water key 43c is turned on, and the washing operation by the bath water supply is immediately executed.
(2) Bath water reserved operation: Both the bath water key 43c and the reservation key 43d are turned on to supply the bath water during the reserved operation.
(3) Normal operation: Both the bath water key 43c and the reservation key 43d are turned off, the tap water is supplied, and the washing operation is started immediately.
(4) Reserved operation: Only the reservation key 43d is turned on, and tap water is supplied during reserved operation.

  Also, in the case of bath water operation or bath water reservation operation, the course selection key 43b of the operation unit 43 allows the bath water full use course to use bath water from washing to the end of rinsing, from washing to the first rinsing. Bath water is used for the final rinse, bath water utilization course using tap water, bath water is used only for washing, and bath water washing course using tap water is possible for rinsing. Furthermore, especially in the case of reserved bath water operation, the course selection key 43b allows the user to select a dedicated water bath reservation water supply course that immediately executes water supply during washing regardless of the reserved operation. .

  FIG. 10 is a diagram showing the flow of each process in the bath water reservation operation, (a) in the case of the bath water reservation operation immediately water supply course, (b) shows the case of the bath water reservation operation normal water supply course. Yes. In FIG. 10, the description of the load amount detection process is omitted.

  Since the flow of each process in the bath water reservation operation normal water supply course is the same as the process flow in FIG. 5 described above, a detailed description thereof will be omitted. The difference is that a predetermined time from the reserved time t1 (for example, after 9 hours) set by the user, specifically, the time required for the entire process of washing, first and second rinsing, and dehydration (for example, 36 minutes) The operation waits until the time point t4 that comes back, starts operation at the time point t4, and supplies the bath water into the washing tub 5 by operating the bath water pump 16 at the time of water supply. In this case, the laundry accommodated in the washing tub 5 is simply left unattended during the period from the end of the reserved operation setting to t4.

  On the other hand, when the water supply course is set immediately after the reserved bath water operation, when the user finishes the setting of the reserved operation and presses the start key 43a, the washing process is started from that time t2, and the bath water pump 16 The water (residual hot water) stored in the bathtub or the like is sucked and supplied into the washing tub 5. Thereafter, in order to promote the dissolution of the detergent put into the washing tub 5 with the water supply, the motor 8 is driven to rotate the pulsator 7 in the left-right direction. In this example, the detergent dissolution promoting operation time is set to 3 minutes. When this detergent dissolution promotion operation is completed, the operation is temporarily stopped and the operation is shifted to the extra operation.

  Since the bath water supply starts immediately after the setting of the reserved operation, for example, when setting the reserved operation after the bathing is completed, the water is still sufficiently high (for example, about 37 to 40 ° C.). Stored inside. Therefore, the detergent can be easily dissolved, and the remaining undissolved detergent can be prevented. Moreover, since the laundry is immersed in the detergent water at a high temperature for a long time, the peeling of dirt from the laundry is promoted. In particular, enzymes such as proteolytic enzymes blended in many detergents in recent years are more effective when the water temperature is high. By adding laundry to detergent water having a high water temperature as described above, such enzymes can be obtained. It is very effective in promoting the removal of dirt by exerting a similar effect. Note that it is desirable to rotate the pulsator 7 periodically (for example, every 30 minutes or every hour) even during the extra period. Thereby, the movement of the laundry and the agitation of the detergent water can be promoted, and the extraordinary effect on the laundry can be spread evenly.

  Then, the pulsator 7 as described above is used at the time t3 until the time t3 is reached, which is traced back by the time required for the entire process of washing, first and second rinsing, and dehydration (for example, 32 minutes). The washing operation by the reverse drive is started, and thereafter, the operation of each stroke is executed in the same manner as the bath water reservation normal water supply course.

  As described above, if the reserved bath water is selected and the operation is performed immediately, the remaining hot water of the bath whose temperature is still sufficiently high can be effectively used to exhibit high cleaning performance. Also, since the hot water remaining in the bathtub after the bath water supply is completed can be discarded, it is not necessary to leave the remaining hot water in the bathtub for a long time, and the bathtub can be cleaned immediately. In addition, the bathroom can be kept hygienic.

  It should be noted that the above embodiment is merely an example, and it is obvious that changes and modifications can be made as appropriate within the scope of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The right side schematic sectional drawing of the washing machine by one Example of this invention. The figure which expanded the inner peripheral surface of the washing tub with the line A-A 'parallel to a rotating shaft in the washing machine of a present Example. The schematic top view in a washing tub in the washing machine of a present Example. The electric system block block diagram of the washing machine of a present Example. The flowchart which shows the flow of the standard washing process in the washing machine of a present Example. The figure which shows the transition state of the schematic water flow pattern from the drive start of a pulsator at the time of a washing operation to the completion | finish of drive in the washing machine of a present Example. The figure which shows the basic drive pattern of 1 cycle of the motor control in the washing machine of a present Example. The timing diagram which shows the detailed relationship between the time passage from the drive start of a pulsator at the time of washing operation at the washing machine of a present Example to the completion of drive, and the rotational speed of a motor. FIG. 9 is a timing chart when a rotational drive pattern different from that in FIG. It is a figure which shows the flow of the process in the case of the bath water reservation driving | operation in the washing machine of a present Example, (a) is the case of a water supply course immediately, (b) is the case of a normal water supply course.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Housing 2 ... Outer tub 3 ... Front suspension rod 4 ... Rear suspension rod 5 ... Washing tub 5a ... Water passage hole 5b ... Water passage opening 6 ... Main shaft 7 ... Pulsator 8 ... Motor 9 ... Clutch 10 ... Torque motor 11 ... Note Water inlet 12 ... Detergent container 13 ... Water inlet 14 ... Water supply pipe 15 ... Water supply valve unit 15a ... Main water supply valve 15b ... Finishing agent water supply valve 16 ... Bath water pump 17 ... Bath water suction hose 18 ... Drain opening 19 ... Drain pipe 20 ... Drain valve 21 ... Leg base 22 ... Water level sensor 24 ... Balance ring 25 ... Circulating water channel 26 ... Lint filter 27 ... Baffle 40 ... Control part 41 ... Inverter drive part 42 ... Load drive part 43 ... Operation part 43a ... Start key 43b ... Course selection key 43c ... Bath water key 43d ... Reservation key 45 ... Lid switch 46 ... Display unit 47 ... Buzzer CL ... Rotating shaft

Claims (7)

A bottomed cylindrical laundry tub for storing laundry therein, and a stirring blade rotatably provided at the inner bottom of the laundry tub, wherein the water is stored in the laundry tub In a washing machine that performs washing and rinsing of laundry by rotating a stirring blade,
In order to contact the laundry moving by the water flow generated in the washing tub by the rotation of the stirring blade and move the laundry so as to be lifted obliquely upward while being placed on the inside, the inner peripheral surface of the washing tub is A washing machine comprising one or a plurality of baffles having a shape that bulges and extends in a direction oblique to the rotation axis of the stirring blade. A washing tank having a bottomed cylindrical shape for storing laundry therein, a stirring blade rotatably provided at an inner bottom portion of the washing tub, and a drive source for rotationally driving the stirring blade. In the washing machine that performs washing and rinsing of the laundry by rotating the stirring blade in a state where water is stored in the tank,
One or a plurality of baffles provided on the inner peripheral surface of the washing tub and extending in a direction oblique to the rotation axis of the stirring blade;
Rotation control means for controlling the drive source so that the stirring blades rotate alternately in the left-right direction during washing operation and rinsing operation, wherein the on-time of the drive source is relatively short and the rotation speed is relatively A rotation control means for performing a control combining a first drive mode set high and a second drive mode set with a relatively long ON time of the drive source and a relatively low rotation speed;
A washing machine comprising:   In the second drive mode, the rotation control means relatively sets the on-time of the drive source when the water flow generated in the washing tub is generated in the direction of lifting the laundry along the baffle by the rotation of the stirring blade. And the rotation speed is relatively low, the on-time of the drive source when rotating the stirring blade in the opposite direction is relatively short, and the rotation speed is relatively high. The washing machine according to claim 2.   The apparatus further comprises load amount detecting means for detecting the amount of laundry stored in the washing tub, and the rotation control means is configured to respond to the amount of laundry detected by the load amount detecting means in the second drive mode. Then, at least one of or both of the on-time and the rotational speed of the drive source when the water flow generated in the washing tub by the rotation of the stirring blade is generated in the direction of lifting the laundry along the baffle is changed. The washing machine according to claim 3.   The washing machine according to any one of claims 1 to 4, wherein the baffle is provided at a position lower than a highest water level line set in the washing tub during a washing operation or a storage rinsing operation. .   The washing machine according to claim 5, wherein a plurality of the baffles are provided at substantially equal angular intervals around the rotation shaft in the washing tub.   The washing machine according to claim 5 or 6, wherein the baffle is inclined at an angle in an angle range of about 30 to 60 degrees with respect to a plane orthogonal to the rotation axis.

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