JP2013128539A - Drum type washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drum type washing machine in which washing performances and rinsing performances are improved by exfoliating dirt attached to laundry from the laundry by centrifugal force rinsing and by discharging water contained in laundry to the outside of the laundry by centrifugal force rinsing, washing time is reduced by carrying out intermediate dewatering and final dewatering in centrifugal force rinsing, and energy saving in washing is achieved.SOLUTION: The drum type washing machine includes: a rotary drum 3 that is rotatably arranged in a water-receiving tub 2 and is for housing laundry; a motor 4 for driving the rotary drum 3; and control means 14 for controlling each process. In a rinsing process, a centrifugal force rinsing operation in which the rotary drum 3 rotates at such a rotational frequency that the centrifugal force of the rotating rotary drum 3 becomes greater than the gravity force is carried out for a predetermined time. When the final centrifugal force rinsing is completed in a rinsing process, draining means is operated without decreasing the rotational frequency and the step shifts to an intermediate dewatering step or a final dewatering step in a next rinsing process.

Description

  The present invention relates to a drum-type washing machine in which laundry is put into a rotating drum, and washing is performed by sequentially controlling each process such as washing, rinsing and dehydration.

  Conventionally, in a drum type washing machine, after putting laundry into the drum, tap water is supplied from the outside of the washing machine by a water supply means, and the drum is accommodated through a detergent container in which detergent has been put in advance. Or water is poured into the drum. After pouring water, wet the laundry sufficiently with the washing liquid while rotating the drum at low speed, and then wet the laundry while rotating the drum for a certain period of time so that the laundry does not stick to the drum wall surface. Cleaning is performed by removing dirt by the impact of falling from the top of the drum as it rotates. In such a drum-type washing machine, particularly when the amount of laundry is large, it is difficult to uniformly wet the clothes put in the drum in the process of wetting the laundry, and uneven washing occurs. There has been a problem that the cleaning performance is significantly reduced.

  Therefore, after water supply, the drum is swung by rotating at a relatively low speed, and the rotation speed is higher than the angular speed at which the washing liquid in the laundry can be discharged out of the drum by centrifugal force. Thus, it has been considered that the laundry is stirred by rotating the drum at a rotational speed higher than a predetermined rotational speed to perform washing and washing (see, for example, Patent Document 1).

JP-A-8-299658

  However, in the washing process of the above washing machine, regardless of the amount of detergent added, the drum operates at a constant high-speed rotation, so the amount of detergent is large and washing water with a high concentration of detergent is contaminated with clothes. When it is easy to act on, it will cause unnecessary high-speed rotation operation, which is a problem in terms of energy saving. In addition, there is a problem that there is no cooperation between the high-speed rotation operation and the intermediate dehydration in the rinsing process, and between the intermediate dehydration and the final dehydration in the dehydration process, and washing time is wasted.

  An object of the present invention is to solve the above-mentioned conventional problems, and to improve washing performance by rinsing at high speed rotation, and to reduce washing time and save energy by linking high speed rotation.

In order to solve the above-described conventional problems, a drum-type washing machine of the present invention is rotatably disposed in a water receiving tub, and stores a rotating drum that houses laundry, a motor that drives the rotating drum, Water supply means for supplying water into the water receiving tub, water level detecting means for detecting the water level in the water receiving tub, drainage means for draining wash water in the water receiving tub, and washing collected in the water receiving tub A discharge port for applying water to the laundry, a circulation pump for circulating the washing water, driving of the motor and the circulation pump, the water supply means, and the drainage means are controlled, and a washing process, a rinsing process, a dehydration process are performed. Control means for controlling each step, and in the rinsing step, the control means performs, for a predetermined time, centrifugal force rinsing that rotates at a rotation speed at which the centrifugal force of the rotating drum that is rotating is greater than gravity, Rinsing process End rinsing centrifugal force activates the draining means without decreasing the number of revolutions, in which so as to shift to as interim dehydrating the next rinsing step or final dehydration step. By removing the rinse water in or near the laundry fibers containing the detergent components remaining in the laundry by this centrifugal force rinsing, the detergent components and dirt substances are rinsed from the laundry. In addition, since rinsing with centrifugal force can improve the rinsing performance, more rinsing components can be removed from the laundry even in the rinsing so that the cleaning performance is improved. In addition, the washing time can be reduced by performing dehydration as it is without reducing the rotational speed of the rotating drum by rinsing with centrifugal force.

  The drum type washing machine of the present invention can improve the rinsing performance in the rinsing process, reduce the rinsing time, and save energy.

Sectional drawing of the drum type washing machine in Embodiment 1 of this invention Block diagram of the drum type washing machine of the present invention The time chart which shows the operation | movement of the rinse process and dehydration process of the drum type washing machine of this invention

  1st invention is rotatably arrange | positioned in a water receiving tank, The rotating drum which accommodates the laundry, The motor which drives the said rotating drum, The water supply means which supplies water in the said water receiving tank, The said water A water level detecting means for detecting a water level in the receiving tank, a draining means for draining the washing water in the water receiving tank, a discharge port for applying the washing water stored in the water receiving tank to the laundry, and the washing A circulation pump for circulating water; and a control means for controlling the driving of the motor and the circulation pump, the water supply means, the drainage means, and controlling each of the washing process, the rinsing process, and the dewatering process, In the rinsing step, the means performs a centrifugal force rinsing at a rotational speed at which the centrifugal force of the rotating rotating drum is greater than gravity for a predetermined time, and when the centrifugal force rinsing in the rinsing step is completed, the rotational speed is set. Lowering Ku wherein actuating the drainage means is a drum-type washing machine, characterized in that the process proceeds to directly interim dehydrating the next rinsing step or final dehydration step.

  Centrifugal force rinsing rotates at a rotational speed at which the centrifugal force of the rotating drum is greater than the force of gravity, so that the dirt adhering to the laundry is removed during rinsing and the moisture contained in the laundry is efficiently removed from the laundry. Therefore, the cleaning performance can be improved simultaneously with the rinsing performance. In addition, by shifting from centrifugal rinsing to intermediate dehydration and final dehydration without stopping the rotation of the rotating drum, the rotating drum is stopped from a predetermined number of rotations, or the rotation number from the stopped state of the rotating drum to the predetermined number of rotations is increased. Since there is no need to perform washing, it is possible to reduce washing time and save energy. Further, by adding a part of the reduction time of the washing time to the washing time and the rinsing time, it is possible to improve the washing performance and the rinsing performance.

  According to a second aspect of the present invention, in the first aspect of the invention, in the first aspect of the invention, the control unit is a drum-type washing machine that operates the drainage unit after a predetermined time has elapsed when rinsing with centrifugal force.

  Thereby, the progress of the drainage in the intermediate dehydration in the next rinsing process and the final dehydration in the dehydration process can be promoted.

  A third aspect of the invention is a drum type washing machine characterized in that, in the first or second aspect of the invention, the control means increases the rotational speed of the rotary drum after the drainage means is actuated. Thereby, progress of dehydration can be promoted in the intermediate dehydration and the final dehydration process in the next rinsing process, and the rinsing performance can be improved.

  According to a fourth aspect of the present invention, in particular, in any one of the first to third aspects of the invention, the control means operates the circulating shower that applies the washing water from the discharge port to the laundry when the centrifugal force is rinsed from the start of the centrifugal force rinse. There is a drum type washing machine. This circulation shower further improves the rinsing and cleaning performance, and since the circulation shower is operated from the start of the centrifugal force rinsing, the clothes can be easily attached to the periphery of the rotating drum in a balanced manner, and the balance control is stabilized. An effect is obtained.

  A fifth aspect of the invention is a drum type washing machine in which, in any one of the first to fourth aspects of the invention, the rotary shaft of the rotary drum is inclined upward. Thereby, the contact with the laundry can be improved with less washing water, and the cleaning effect can be enhanced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiment.

(Embodiment 1)
FIG. 1 is a cross-sectional view of a drum type washing machine according to a first embodiment of the present invention, FIG. 2 is a block circuit diagram thereof, and FIG. 3 is a time chart showing operations of a rinsing process and a dehydrating process.

  In FIG. 1 to FIG. 3, a water receiving tub 2 is disposed inside the main body 1 of the drum type washing machine, and a rotating drum 3 as a washing tub is tilted forward from the horizontal direction inside the water receiving tub 2. It arrange | positions in the state which can be rotated with a rotating shaft. The rotating drum 3 is rotated by a motor 4 connected to the back surface. The rotating drum 3 is provided with a large number of water passage holes (not shown) on the outer peripheral surface, and several protruding plates (not shown) are provided on the inner wall surface thereof. It also functions as a drying tank.

  A water intake 5 is disposed at the lowest part on the rear side of the water receiving tank 2 provided at the rear end, and is connected to a drain pipe 7 that is opened and closed by a drain valve 6 that is a drain means. A circulation path 9 is connected between the intake port 5 and the drain valve 6 to the discharge port 8 for discharging the washing liquid taken in from the intake port 5 to the rotary drum 3, and the water receiving tub 2 is washed by the circulation pump 10. Water and rinsing water (hereinafter referred to as “washing water” together) pass through the circulation path 9 and are discharged to the rotating drum 3 from the discharge port 8 as a circulating shower, and the washing water is applied to the laundry in the rotating drum 3. Can be done. The water supply valve 11 is a water supply means for supplying water into the water receiving tank 2, and the water level detecting means 12 is for detecting the water level in the water receiving tank 2.

  The control device 13 has a control means 14 constituted by a microcomputer, and controls the operations of the motor 4, drain valve 6, circulation pump 10, water supply valve 11, etc. via the power switching means 15, washing process, rinsing process A series of steps such as a dehydration step are sequentially controlled. The input setting means 16 sets a driving course or the like, and the control means 14 inputs information from the input setting means 16 and displays a display means 17 based on the information to notify the user. The storage means 18 stores data necessary for control by the control means 14. The power source is a commercial power source 19 and has a power switch 20. Furthermore, it has a rotation speed detection means 21 for detecting the rotation speed of the rotary drum 3, information of this rotation speed detection means 21 is sent to the control means 14, and the control means 14 passes through the power switching means 15. Control the number of revolutions.

When the laundry is put into the rotating drum 3 and the power switch 20 is pressed, the user can input a washing course or the like by the input setting means 16, and the control means 14 receives the information from the input setting means 16. Based on the input information, the display means 17 is displayed to inform the user. When the user presses the laundry start button to start washing, the control means 14 detects the amount of laundry as a laundry weight detection step in the washing step. The amount of laundry is detected by detecting the magnitude of the current signal of the motor 4 when the motor 4 is controlled to rotate the rotating drum 3 together with the laundry. Further, the control means 14 determines the amount of detergent based on the result of determination of the amount of laundry, displays it on the display means 17 and informs the user, and considers the time for the user to put in the detergent for a predetermined time (for example, 1 Min)) After the elapse of time, preparation for water supply starts.

  The basic water supply amount for washing is determined based on the amount of laundry. For example, when the amount of laundry is determined to be “low”, the “low” water level is set as the set water level, and the amount of laundry is When it is determined as “medium”, the “medium” water level is set as the set water level, and when the amount of laundry is determined as “high”, the “high” water level is set as the set water level.

  Next, the control means 14 opens the water supply valve 11 as a water supply process in the washing process, supplies water until the water receiving tank 2 and the rotary drum 3 reach the set water level, and also via the power switching means 15. Then, stirring is started while rotating the rotating drum 3 at a low speed. When the control means 14 determines that the water level detection means 12 has reached the set water level, the control means 14 closes the water supply valve 11 and ends the water supply process. In the agitation, the rotational speed of the rotating drum 3 is such that the laundry is lifted up in the rotating drum 3 and falls from the upper part of the rotating drum 3 due to gravity, and the kinetic energy at the time of dropping is effectively applied. The rotational speed must be such that it does not stick to the wall surface due to centrifugal force, and is preferably about 50 r / min, although it depends on the amount of laundry. The rotation direction of the rotary drum 3 may be the same direction or periodically switched.

  Next, it moves to the stirring washing process in the washing process. At this time, the control means 14 controls the circulation pump 10 through the power switching means 15 and discharges the wash water in which the detergent is sufficiently dissolved from the discharge port 8 into the rotary drum 3 through the circulation path 9 by the circulation shower. This promotes the penetration of washing water into the laundry. For this reason, the rotation speed of the circulation pump 10 is set to a rotation speed at which the circulating water is firmly discharged into the rotating drum 3 and the washing water can easily permeate into the laundry. The intermittent operation is OFF for 1 minute. In the agitation washing, the laundry in the rotating drum 3 is caught by a protruding plate provided in the rotating drum 3 and is lifted and dropped onto the water surface where the detergent is dissolved. The dirt on the laundry is removed by penetration and discharge. When the predetermined time has elapsed and the washing process is completed, the control means 14 operates the circulation pump 10 to drain the washing water in the water receiving tank 2.

  Thereafter, as shown in FIG. 3, the first rinsing step 1 is performed in which the intermediate dehydration and the stirring operation after completion of the predetermined water supply are performed. The control means 14 sends a signal to the motor 4 to start a balance control operation for the laundry in the rotary drum 3 necessary for intermediate dehydration. This balance control operation is performed using a general vibration detection sensor (not shown) or the like in order to reduce vibration when the rotary drum 3 is rotated at a high speed, and the rotation speed is, for example, about 50 r / min. After the balance control operation is completed, the control means 14 gradually increases the rotation speed of the motor 4 to increase the rotation speed of the rotary drum 3 and dehydrates the washing water from the laundry. In the intermediate dehydration, the rotational speed of the rotary drum 3 after the balance control is completed is increased to a set maximum rotational speed, for example, 700 r / min, and is operated at the maximum rotational speed for a predetermined time, and then the rotational speed is decreased. Stop.

  At the end of the intermediate dehydration, the laundry is stuck to the rotating drum 3. The control means 14 opens the water supply valve 11 and accumulates rinsing water (washing water) in the water receiving tank 2, and also drives the motor 4 via the power switching means 15 to rotate the rotating drum 3 and perform the stirring operation. I do. As a result, the laundry stuck to the rotating drum 3 is peeled off from the rotating drum 3, and the laundry in the rinsing water collected in the water receiving tub 2 is stirred and rinsed. Specifically, when the rinse water accumulates in the water receiving tank 2 and the water level detection means 12 detects the water level N1, the control means 14 sends a signal to the circulation pump 10 while continuing the water supply, and the rinse through the circulation path 9 Water is discharged from the discharge port 8 to start rinsing water on the laundry by a circulating shower.

  Further, when the water level detection means 12 detects the water level N2, the control means 14 stops water supply but continues the stirring operation to perform rinsing. When the agitation operation is performed for a predetermined time, the control means 14 sends a signal to the circulation pump 10 when the circulation pump 10 is stopped, and the rinsing water passing through the circulation path 9 is discharged from the discharge port 8 by the circulation shower. The rinsing water is started to be applied to the laundry, and the centrifugal force rinsing that rotates at a rotational speed at which the centrifugal force of the rotating drum 3 is larger than the gravity is started. That is, the control means 14 starts rotating the rotating drum 3 at a high speed in a certain direction by the motor 4 via the power switching means 15, and the control means 14 receives the signal of the rotation speed detecting means 21, and the rotating drum 3 Control the number of revolutions. The centrifugal force generated when the rotating drum 3 rotates at high speed causes the laundry to stick to the wall surface of the rotating drum 3, and the rinsing water contained in the laundry is squeezed out, and then the rotating drum 3 It moves to the water receiving tank 2 side through many water holes (not shown). The speed at which the rotating drum 3 is rotated at a high speed is, for example, 150 r / min at which the moisture contained in the laundry can be forcibly separated by centrifugal force.

  When the centrifugal force rinsing is finished after a predetermined time has elapsed after the rotational speed of the rotating drum 3 reaches the predetermined rotational speed, the control means 14 sends a signal to the power switching means 15 to stop the circulation pump 10 and The valve 6 is actuated to start drainage, and the rotational speed of the rotary drum 3 is further increased. As a result, the laundry shifts from the rinsing step 1 to the rinsing step 2 and the intermediate dehydration in the rinsing step 2 is in progress. The control means 14 increases the rotational speed of the rotating drum 3 to, for example, 800 r / min, which is the maximum rotational speed set in the intermediate dehydration, and after operating at the rotational speed for a predetermined time, the brake is applied to rotate the rotating drum 3. Stop.

  The water supply / stirring operation after completion of the intermediate dehydration in the rinsing step 2 is the same as the water supply / stirring operation in the rinsing step 1. When the centrifugal force rinsing in the rinsing step 2 is performed, the control unit 14 sends a signal to the power switching unit 15 to stop the circulation pump 10 and to operate the drain valve 6 to start draining. Increase the number. As a result, the laundry shifts from the rinsing process 2 to the final dehydration process, and the final dehydration process is in progress. The control means 14 increases the rotational speed of the rotary drum 3 to the maximum rotational speed set in the final dehydration, for example, 1400 r / min, and after operating at the rotational speed for a predetermined time, the brake is applied and the rotational drum 3 rotates. Stop. When this final dehydration step is finished, the washing is finished and the control means 14 shuts off the power.

  In the above rinsing step in washing, in the case of centrifugal rinsing, the rinsing water in the laundry fibers containing the rinsing water containing the detergent components remaining in the laundry is removed by centrifugal force, thereby washing the laundry. Since it is possible to efficiently remove detergent components and dirt substances from the laundry together with the rinse water, rinsing with centrifugal force can improve the rinsing performance, and washing can also be performed because more dirt components can be removed from the laundry even during rinsing. The effect of improving performance is also obtained.

  Further, in the centrifugal force rinsing performed at the end of the rinsing step, without lowering the rotational speed of the rotary drum 3 in the centrifugal force rinsing, the intermediate dehydration or final dehydration step in the next rinsing step is performed as it is, Since the progress of intermediate dehydration and final dehydration can be promoted, the washing time can be reduced by this, or this time can be used for the water stirring time in the washing-related operation and rinsing process, thereby further improving the washing performance and rinsing performance. Can be achieved.

  In addition, since the circulation shower is operated from the start of the centrifugal force rinsing at the time of the centrifugal force rinsing, more rinsing water is supplied to the clothes attached to the rotating drum 3 at the time of the centrifugal force rinsing. Since the water is moved to the water receiving tank 2 side and the rinsing water is positively acted on the detergent component of the clothing, the rinsing performance is further improved.

  In addition, since the circulation shower is operated from the start of the centrifugal force rinsing, the clothes absorb water and easily adhere to the periphery of the rotating drum 3 in a balanced manner, and an effect of stabilizing the balance control can be obtained.

  In the present invention, the rotational speeds of the rotary drum 3 and the circulation pump 10 are shown, but are not particularly specified. Further, the centrifugal force rinsing may be performed a plurality of times in each rinsing step.

  As described above, in the rinsing step, the centrifugal force rinsing that rotates at a rotational speed at which the centrifugal force of the rotating rotating drum is greater than the gravity is performed for a predetermined time at the end of the rinsing step, and when the centrifugal force rinsing is completed, Without lowering the rotational speed, the drainage means of the next rinsing process is operated as it is to move to the intermediate dehydration process or the final dehydration process, thereby improving the washing and rinsing performance, and reducing the washing time and washing. Can save energy.

DESCRIPTION OF SYMBOLS 1 Main body 2 Water receiving tank 3 Rotating drum 4 Motor 6 Drain valve 8 Discharge port 10 Circulation pump 11 Water supply valve 12 Water level detection means 14 Control means

Claims (5)

A rotating drum that is rotatably disposed in the water receiving tub, stores laundry, a motor that drives the rotating drum, water supply means for supplying water into the water receiving tub, and a water level in the water receiving tub. Water level detecting means for detecting, draining means for draining the washing water in the water receiving tank, a discharge port for applying the washing water stored in the water receiving tank to the laundry, and a circulation pump for circulating the washing water And control means for controlling the driving of the motor and the circulation pump, the water supply means, the drainage means, and controlling each of the washing process, the rinsing process, and the dehydrating process, the control means in the rinsing process, Centrifugal force rinsing that rotates at a rotational speed at which the centrifugal force of the rotating drum that is rotating is greater than gravity is performed for a predetermined time, and at the end of the final centrifugal force rinsing in the rinsing step, the rotational speed is reduced without reducing the rotational speed. Water means is operated, drum-type washing machine, characterized in that migrate as interim dehydrating the next rinsing process, or the final dehydration step. 2. The drum type washing machine according to claim 1, wherein the control means activates the drainage means after a predetermined time elapses when the centrifugal force is rinsed. The drum type washing machine according to claim 1 or 2, wherein the control means increases the rotational speed of the rotary drum after the drainage means is actuated. The drum according to any one of claims 1 to 3, wherein the control means operates a circulating shower that applies washing water from the discharge port to the laundry during centrifugal force rinsing from the start of centrifugal force rinsing. Type washing machine. The drum type washing machine according to any one of claims 1 to 4, wherein a rotating shaft of the rotating drum is inclined forward and upward.

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