JP2016086887A - Drum type washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drum type washing machine which allows control for suppressing vibration by decreasing a rise degree of a rotational speed of a drum to be selected by a user's manual operation.SOLUTION: A drum type washing machine of the embodiment includes: an outer case; a water tub supported inside the outer case by a vibration-proof device; a drum disposed inside the water tub; a liquid-sealed type rotation balancer provided in the drum; a motor for rotating the drum; control means for controlling the motor; and an operation part operated by a manual operation. In the case where the operation part is operated by a manual operation, the control means performs angular acceleration decreasing control of the drum for decreasing angular acceleration in a rotational speed region in vertical vicinity including a rotational speed region where the water tub generates resonance.SELECTED DRAWING: Figure 4

Description

  Embodiments described herein relate generally to a drum type washing machine.

  In the drum type washing machine, if the laundry is unevenly distributed in the rotating drum, the drum vibrates due to the uneven load, and the water tank in which the drum is accommodated also vibrates. Particularly, in the dehydration process in which the drum is rotated at a high speed, the vibration of the drum is further increased, and accordingly, the vibration of the water tank is further increased.

  For this reason, various techniques for suppressing vibration have been considered. For example, Patent Literature 1 discloses a technique for suppressing vibrations by increasing the damping force of a damper that supports and dampens a water tank. In addition, a technique for suppressing vibration by increasing the degree of increase in the rotation speed of the drum in the dehydration process and passing the rotation speed region in which the water tank resonates in a short time is also considered.

JP 2011-229554 A

  By the way, for example, in the rotation speed range where the liquid-sealed rotary balancer attached to the drum is sloshing, that is, the internal liquid oscillates, the increase in the rotation speed of the drum during the dehydration process is reduced. It has been confirmed by experiments by the present inventors that the amplitude can be suppressed. That is, it has been confirmed that vibration can be suppressed by slowing the increase in the rotational speed of the drum during the dehydration process. Therefore, since the amplitude generated by sloshing cannot be suppressed by increasing the degree of increase in the rotational speed of the drum in the dehydration process, it does not necessarily lead to suppression of vibration. Further, according to the control for slowing the increase degree of the drum rotation speed, the load on the motor can be reduced as compared with the case of increasing the drum rotation speed increase degree, and energy saving can be achieved.

  Therefore, the present embodiment provides a drum type washing machine in which control for suppressing vibration by slowing the degree of increase in the rotational speed of the drum can be selected by manual operation by the user.

  The drum type washing machine of this embodiment includes an outer box, a water tank supported by a vibration isolator inside the outer box, a drum disposed inside the water tank, and a liquid sealed provided in the drum. A rotary balancer having a shape, a motor for rotating the drum, a control means for controlling the motor, and an operation unit operated manually. And when the said operation part is operated manually, the said control means is the angular acceleration reduction control which lowers | hangs the angular acceleration in the rotational speed area of the upper and lower vicinity including the rotational speed area where the said water tank resonates when the said operation part is operated manually. I do.

The longitudinal cross-sectional view which shows schematically the structural example of the drum type washing machine which concerns on 1st Embodiment. Block diagram showing an example of the electrical configuration of a drum-type washing machine A diagram showing a configuration example of the operation panel Diagram showing characteristics of angular acceleration reduction control The figure which shows the structural example of the operation panel which concerns on 2nd Embodiment. The figure which shows the structural example of the operation panel which concerns on 3rd Embodiment.

Hereinafter, a plurality of embodiments according to a drum type washing machine will be described with reference to the drawings. In each embodiment, substantially the same elements are denoted by the same reference numerals, and description thereof is omitted.
(First embodiment)
The drum type washing machine 100 illustrated in FIG. 1 has an outer box 1 as an outer shell. The outer box 1 has a bottom plate 1a at the bottom, and has legs 1b at the four corners of the outer lower surface of the bottom plate 1a. In FIG. 1, a laundry entrance 2 is provided at a substantially central portion of the front plate portion of the outer box 1 on the right side. The laundry entrance 2 is provided with a door 3 that opens and closes the laundry entrance 2. In addition, an operation panel 4 provided for the user's operation is provided on the upper part of the front plate portion of the outer box 1. A control device 5 for operation control is provided inside the outer box 1 on the back side of the operation panel 4.

  A water tank 6 is disposed inside the outer box 1. The water tank 6 has a bottomed cylindrical shape with a horizontal axis whose axial direction is the front-rear direction. The water tank 6 is elastically supported on the bottom plate 1a of the outer box 1 in a state where the water tank 6 is inclined forward and upward by a pair of left and right suspensions 7. In this case, the suspension 7 has a damper (not shown) as a vibration isolator that attenuates the vibration of the water tank 6. Accordingly, the water tank 6 is supported inside the outer box 1 by a suspension 7 having a damper.

  A bearing housing 8 and a motor 9 are attached to the back of the water tank 6. In this case, the motor 9 is constituted by, for example, an outer rotor type DC brushless DC motor. In the motor 9, a rotating shaft (not shown) at the center of the rotor 9 a is inserted into the water tank 6 through the bearing housing 8.

  Inside the water tank 6, a drum 10 which is a rotating tank is disposed. The drum 10 also has a bottomed cylindrical shape with a horizontal axis whose axial direction is the front-rear direction. The drum 10 has a central portion at the back thereof attached to the tip of the rotating shaft of the motor 9. And the drum 10 is also supported in the state which inclined to the front rising coaxial with the water tank 6. FIG. The drum 10 is rotated by a motor 9. That is, the motor 9 functions as a drum driving device that rotates the drum 10. A large number of small holes 11 are formed in the peripheral side portion constituting the body portion of the drum 10.

  An opening 12 is provided in the front part of the drum 10, and an opening 13 is provided in the front part of the water tank 6. The laundry entrance / exit 2 is connected to the opening 13 of the water tub 6 in a watertight manner via an annular bellows 14. Thereby, the laundry entrance 2 is connected to the inside of the drum 10 from the bellows 14 through the opening 13 of the water tub 6 and the opening 12 of the drum 10.

  A rotation balancer 15 is attached to the peripheral edge of the opening 12 of the drum 10. The rotary balancer 15 is a so-called liquid-filled balancer in which a liquid 15b such as a potassium chloride solution is sealed in an annular container 15a. In this case, the rotary balancer 15 has a configuration in which the liquid 15b, for example, about half the volume of the container 15a is sealed. Further, vibration sensors 16 and 17 are provided as vibration detection means for detecting the vibration of the water tank 6 at the front and rear of the upper part of the water tank 6. These vibration sensors 16 and 17 are constituted by acceleration sensors, for example.

  A drain outlet (not shown) is formed at the rear of the bottom, which is the lowest part of the water tank 6. A drain pipe 19 connected to the outside of the machine is connected to the drain port via a drain valve 18. In addition, a drying unit 20 is disposed in a portion extending from the back to the front of the water tank 6. The drying unit 20 includes a so-called water-cooled dehumidifier 21 that performs dehumidification with water supplied from the water supply valve 28 shown in FIG. 2, a blower 22 that uses a motor 22a as a drive source, and a heater that mainly includes a heater 23a. And a device 23. The drying unit 20 drives the air blower 22 to dehumidify the air in the water tank 6 by the dehumidifying apparatus 21, and then heats the air in the water tank 6 to return it to the water tank 6. Thereby, the drying unit 20 dries the laundry in the drum 10.

  Next, the electrical configuration of the drum type washing machine 100 will be described. That is, as illustrated in FIG. 2, the control device 5 is configured mainly with a microcomputer, for example, and functions as a control unit that controls the overall operation of the drum type washing machine 100, such as drive control of the motor 9. . The control device 5 includes an operation unit 24 including various operation switches provided on the operation panel 4, a water level sensor 25 that detects the water level in the water tank 6, a rotation sensor that detects rotation of the motor 9, and thus rotation of the drum 10. 26, a current sensor 27 for detecting a current flowing through the motor 9, and the vibration sensors 16 and 17 described above are connected.

  The control device 5 includes various operation signals from the operation unit 24, a water level detection signal from the water level sensor 25, a rotation detection signal from the rotation sensor 26, a current detection signal from the current sensor 27, and vibration sensors 16 and 17. Various signals such as a vibration detection signal from are input. And the control apparatus 5 is based on the various signals input and the control program memorize | stored beforehand, such as the water supply valve 28, the motor 9, the drain valve 18, the motor 22a of the air blower 22, and the heater 23a of the heating apparatus 23. The drive is controlled via the drive circuit 29.

  The control device 5 also functions as a rotation speed detecting means for detecting the rotation speed of the drum 10 based on an input from the rotation sensor 26 in particular. Then, the control device 5 calculates the angular speed “ω” of the drum 10, that is, “ω = v / r”, from the detected rotational speed “v” and the radius “r” of the drum 10. The control device 5 functions as an angular acceleration determination unit that determines the angular acceleration of the drum 10 based on the calculated change rate of the angular velocity.

  Next, the configuration of the operation panel 4 will be described. That is, as illustrated in FIG. 3, the operation panel 4 is provided with an operation unit 31 and a course display unit 32. The operation unit 31 is operated manually by the user, and in this case, the operation unit 31 is provided so as to be able to be rotated and pressed. In addition, this operation part 31 may be comprised mechanically by the operation knob which can be rotated and pressed, and may be comprised, for example by the touch button which consists of a capacitive touch sensor. In short, the operation unit 31 may employ various configurations as long as it is configured to be manually operated by the user.

  The course display unit 32 is divided into a normal area 32a and an energy saving area 32b. In this case, a speed course is displayed in the normal area 32a. The speed course is an example of a short course in which the time required from the start of operation to the completion of operation is at least shorter than the standard course. On the other hand, in the energy saving area 32b, various driving courses such as a standard course, a dry course, a blanket course, a good night course, a meticulous course, and the like are illustrated as driving courses other than the short-time course.

  The standard course is a standard course generally set for this type of washing machine, and adjusts the water level and operation time according to the weight of the laundry in the drum 10 to perform the washing process, the rinsing process, This course performs a dehydration process and a drying process. The dry course and the blanket course are well-known driving courses, and the description of the contents is omitted. The night course is a driving course called a so-called reserved driving, and is a course in which driving is completed by the next morning if the execution of driving by the night course is set before going to bed. Since this good night course is a course that only needs to be completed by the next morning, the required time may be slightly prolonged. Therefore, in this embodiment, it is provided as an example of an operation course with a margin in the required time from the start of operation to the completion of operation. The meticulous course is an example of a long-time course in which the time required from the start of operation to the completion of operation is at least longer than the standard course, and the laundry in the drum 10 is carefully washed over a longer time than the standard. It is a course.

  In addition, each course other than the good night course displayed in the energy saving area 32b has a relatively long time required from the start of driving to the completion of driving as compared with the speed course. That is, it is an operation course in which the required time from the start of operation to the completion of operation may be slightly prolonged. Therefore, in the present embodiment, driving courses other than the speed course, that is, all driving courses displayed in the energy saving area 32b are provided as driving courses that have a margin in the required time from the start of driving to the completion of driving.

  According to the operation panel 4 having such a configuration, any one of the plurality of courses displayed on the course display unit 32 is sequentially displayed as the user manually rotates the operation unit 31. Selected. When the user manually presses the operation unit 31, the course selected at that time is determined as the driving course to be executed. And if a user operates the start button which is not shown in figure, the drum type washing machine 100 will start an operation | movement by the set course. The operation unit 31 may be configured to also serve as a start button. That is, the drum type washing machine 100 may be configured to start operation by pressing the operation unit 31 after setting the operation course by manual operation of the operation unit 31. In addition, the drum type washing machine 100 configures each course displayed on the course display unit 32 as a button that is manually pressed by the user, and the course operated by the user is used as an operation course to be executed. It is good also as a structure to set.

  In the drum type washing machine 100 configured as described above, when the control device 5 starts operation based on manual operation of the operation panel 4 by the user, various operations including a washing process, a rinsing process, a dehydrating process, a drying process, and the like are performed. Of the course, the driving course selected by the user's manual operation is executed.

  Among them, the washing process is a process performed by rotating the drum 10 at low speed alternately in the normal rotation direction and the reverse rotation direction by the motor 9 after the water supply valve 28 supplies the water tank 6 with a predetermined water level. In the washing process, water including a detergent and a softening agent is supplied into the water tank 6. In this washing process, the laundry accommodated in the drum 10 is repeatedly scraped and then dropped, whereby the laundry is washed. After the washing process is completed, the drain valve 18 is opened, and the water in the water tank 6 is discharged out of the machine through the drain pipe 19.

  The rinsing process is the same as the washing process except that water that does not contain detergent or softener is supplied into the aquarium 6. The dehydration process is a process performed by rotating the drum 10 in one direction at a high speed by the motor 9 with the drain valve 18 opened. In this dehydration process, the water contained in the laundry is removed through the small holes 11 by the centrifugal action of the drum 10 that rotates at a high speed. The drying process is a process performed by rotating the drum 10 alternately at a low speed in the normal direction and the reverse direction by the motor 9 and operating the drying unit 20. By the operation of the drying unit 20, the air in the water tank 6 is repeatedly dehumidified by the dehumidifying device 21 while being circulated by the blower 22, and then heated by the heating device 23 and returned to the water tank 6. Thereby, the laundry after dehydration in the drum 10 is dried.

  In the operation of the drum type washing machine 100 thus performed, when the drum 10 is rotated, the drum 10 vibrates. In particular, during the dehydration process in which the drum 10 is rotated at a high speed, the drum 10 vibrates greatly. Further, if the laundry in the drum 10 is unevenly distributed, the drum 10 vibrates more greatly due to the uneven load. When the drum 10 vibrates, the drum 10 is accommodated, and the water tank 6 integrated with the drum 10 also vibrates via the rotation shaft of the motor 9.

  Therefore, in the drum type washing machine 100, the control device 5 is configured to be able to execute “angular acceleration lowering control” as control for suppressing vibration. Next, this angular acceleration lowering control will be described. In FIG. 4, a change in the rotation speed of the drum 10 by the angular acceleration reduction control is indicated by a solid line a, and a change in the rotation speed of the drum 10 by the conventional control is indicated by a broken line b.

  In other words, in the conventional control, the rotational speed of the drum 10 is gradually increased, for example, at an angular acceleration of 10 [rpm / second], thereby quickly passing through the rotational speed region K where the water tank 6 causes resonance. Hereinafter, the “rotational speed range K in which the water tank 6 causes resonance” is referred to as “resonant rotational speed range K”. This “resonant rotational speed region K” is a resonant region based on a sloshing phenomenon, which will be described later, and in this embodiment, substantially coincides with a resonant rotational speed region based on the natural frequency of the drum type washing machine 100. However, the resonance rotational speed region K based on the sloshing phenomenon may vary depending on the drum type washing machine as a product. Therefore, depending on the product, the resonance rotational speed region based on the sloshing phenomenon and the resonance rotational speed based on the natural frequency. The area may be different.

  In the conventional control, after that, in order to perform a bubble blowing process for blowing bubbles generated in the drum 10, the angular acceleration is reduced to 0 [rpm / second] to keep the rotation speed of the drum 10 constant. Keeps on time. In the conventional control, the rotational speed of the drum 10 is then gradually increased again to a high-speed rotation range with an angular acceleration of 10 [rpm / second], for example.

  On the other hand, in the “angular acceleration lowering control” according to the present embodiment, the angular acceleration of the drum 10 in the rotational speed region L in the vicinity of the upper and lower sides including the resonant rotational speed region K is decreased as compared with the conventional control. Yes. In this case, the rotational speed range L in the vicinity of the upper and lower sides including the resonant rotational speed range K starts from the rotational speed K1, which is lower than the resonant rotational speed range K by a predetermined speed V1, that is, “K−V1 [rpm]”. This is a rotational speed range set to a predetermined range within a range up to a rotational speed K2, which is higher than the speed range K by a predetermined speed V2, that is, “K + V2 [rpm]”. In this case, as the rotational speed region L, a range of rotational speeds K1 to K2 is set.

  For example, about 100 [rpm] is assumed as the rotation speed K1, and about 250 [rpm] is assumed as the rotation speed K2. In a situation where the rotational speed of the drum 10 is included in the rotational speed range K1 to K2, that is, the rotational speed range L, so-called sloshing tends to occur in the rotary balancer 15. Therefore, the control device 5 decreases the angular acceleration of the drum 10 in the rotation speed range L from 10 [rpm / second] to 5 [rpm / second] in this case. That is, according to the angular acceleration lowering control, the control device 5 performs control so that the rotational speed of the drum 10 is decreased in the rotational speed range L where the sloshing is likely to occur in the rotary balancer 15. The angular acceleration of the drum 10 is preferably lowered to at least 8 [rpm / second] or less.

  In the angular acceleration lowering control, the angular acceleration of the drum 10 other than the rotational speed range L is controlled to 10 [rpm / second] as in the conventional case with respect to the rotational speed range L in which the angular acceleration of the drum 10 is decreased. The The region other than the rotation speed region L is a rotation speed region before the rotation speed region L, that is, a rotation speed region M from the rotation start time to the rotation speed region L, and a rotation after the rotation speed region L. This is a rotational speed region N that leaves the speed region, that is, the rotational speed region L and reaches the high-speed rotational region.

  That is, according to the angular acceleration lowering control, in the rotational speed region L where the angular acceleration of the drum 10 is decreased, the angular acceleration is set to be higher than the angular acceleration of the drum 10 in the rotational speed regions M and N before and after the rotational speed region L. It is lowered. In this case, in the rotational speed region L, it is preferable to lower the angular acceleration at least than the latter, that is, the rotational speed region N after the rotational speed region L.

  Conventionally, the technique of gradually increasing the rotational speed of the drum at a predetermined angular acceleration to quickly pass through the rotational speed range in which the water tank resonates mainly does not grow vibration caused by resonance based on the natural frequency of the drum type washing machine. It is adopted for the purpose of doing so. However, the cause of the vibration growth at the resonance rotational speed is that the conventional damper configuration cannot sufficiently attenuate the vibration due to the water tank resonance based on the natural frequency.

  However, according to the drum type washing machine 100 according to the present embodiment, the water tub 6 is supported by vibration suppression by the suspension 7 having a damper that exhibits sufficient performance as a vibration isolation device that attenuates vibration based on the natural frequency. Yes. That is, a means for attenuating vibration due to resonance of the water tank 6 based on the natural frequency is provided. Therefore, according to the drum type washing machine 100, even if vibration due to resonance occurs in the water tub 6 based on the natural frequency, the maximum amplitude is the excitation force due to the uneven distribution of the laundry and the damping force due to the vibration isolator. The predetermined value is determined based on the balance. That is, according to the drum type washing machine 100, the vibration generated in the water tank 6 due to the resonance based on the natural frequency does not have sufficient damping force with respect to the vibration of the water tank 6 without passing through the speed range quickly. It doesn't grow as much as the traditional configuration.

  However, the drum type washing machine 100 is provided with a liquid-filled rotary balancer 15 in the drum 10. In the drum type washing machine 100 having such a configuration, it is necessary to consider vibrations based on factors other than the resonance based on the natural frequency described above. That is, in the drum-type washing machine 100 including the liquid-sealed rotary balancer 15, for example, so-called sloshing in which the liquid 15b of the rotary balancer 15 swings in the container 15a in the front and rear rotational speed ranges including the resonant rotational speed range K occurs. Prone to occur. And according to the drum type washing machine 100, the vibration of the water tank 6 may grow under the influence of the sloshing.

  Therefore, in the drum type washing machine 100, as described above, the angular acceleration of the drum 10 in the predetermined rotational speed region L in the vicinity of the upper and lower sides including the resonant rotational speed region K that causes sloshing is lowered. That is, according to the drum type washing machine 100, it is possible to avoid the occurrence of sloshing in the rotary balancer 15 even when the uneven distribution degree of the laundry is large by passing the resonance rotational speed region K slowly. Therefore, according to the drum type washing machine 100, the vibration of the water tub 6 can be kept small.

  However, if the angular acceleration of the drum 10 in the rotational speed region L is lowered so as to pass through the resonant rotational speed region K slowly, the time required for the dehydration operation increases accordingly. For example, as described above, when the angular acceleration of the drum 10 in the rotational speed region L is lowered from 10 [rpm / second] to 5 [rpm / second], it is assumed that the time required for the dehydrating operation increases by about 15 seconds. The Here, assuming that the number of dehydrations in one operation is a total of four times including the dehydration operation after the rinsing process and the dehydration operation in the final stage, the dehydration operation increases by about 15 seconds. Therefore, the required time increases for about 60 seconds in one operation. That is, if the control for lowering the angular acceleration of the drum 10 is performed during the dehydrating operation, the time required for the dehydrating operation and the time required for the entire operation increases. Therefore, for example, if the angular acceleration lowering control is performed during the execution of the speed course, the advantage of the speed course that the driving is completed in a short time is lost.

  Therefore, in the drum type washing machine 100 according to the present embodiment, the control device 5 is a speed provided in the energy saving area 32b of the operation course in which the required time from the start of the operation to the completion of the operation has a margin. Only when various driving courses other than the course are selected by manual operation of the operation unit 31, the angular acceleration lowering control is performed during execution of the selected driving course. In other words, the control device 5 does not perform the angular acceleration lowering control when the speed course is selected by the manual operation of the operation unit 31. Therefore, according to the drum type washing machine 100, vibrations can be suppressed by the angular acceleration lowering control and the load applied to the motor 9 can be suppressed for the driving course having a sufficient time from the start of driving to the completion of driving. It can be reduced, and energy saving can be achieved even in consideration of an increase in operation time. Further, regarding the speed course, it is possible to avoid the required time from being extended due to the angular acceleration lowering control.

(Second Embodiment)
The operation panel 4 illustrated in FIG. 5 further includes an energy saving button 41. The energy saving button 41 is an example of an operation unit operated manually by a user. The energy saving button 41 may be configured mechanically by a push button or the like, or may be configured by a touch button or the like. When the energy-saving button 41 is manually operated by the user, the control device 5 uses the driving course in all driving courses provided in the course display unit 32, that is, in all driving courses including the speed course. The angular acceleration lowering control is performed during execution.

  As described above, according to the “angular acceleration lowering control” according to the present embodiment, although the time required for the dehydrating operation and the time required for the entire operation increase, the load on the motor 9 is reduced by reducing the angular acceleration of the drum 10. It can be reduced to save energy. On the other hand, depending on the user, the required time may be slightly prolonged, so that it may be desired to save energy even in the speed course. That is, there are users who want to save energy in all driving courses including the speed course.

  According to the present embodiment, when the energy saving button 41 is manually operated, the angular acceleration lowering control is performed in all driving courses including the speed course. Therefore, according to the present embodiment, it is possible to meet the demand for energy saving in all driving courses including the speed course.

(Third embodiment)
The operation panel 4 illustrated in FIG. 6 further includes a peak shift button 51 and a display unit 52. The peak shift button 51 is an example of an operation unit operated manually by a user. For example, the peak shift button 51 may be mechanically configured by a push button or the like, or may be configured by a touch button or the like. In this case, the display unit 52 is configured by a so-called segment type liquid crystal display. The display unit 52 displays the current time measured by a timer circuit (not shown).

  The control device 5 turns on the peak shift function when the peak shift button 51 is manually operated by the user. The peak shift function is a function of reducing the power consumption of the drum type washing machine 100 during the peak period of power demand. When the peak shift function is turned on, the drum type washing machine 100 drives, for example, the motor 22a of the blower 22 with a lower output than normal, or drives the heater 23a of the heating device 23 with a lower output than normal. As a result, the power consumption during the peak period of power demand is reduced as much as possible.

  In this case, “14:00 to 16:00” is preset in the drum type washing machine 100 as a peak period of power demand. The peak period of this power demand is set within a range of 1 hour before and after 15:00. Note that the peak period of power demand is not limited to this, and can be changed and set as appropriate according to various factors such as the region where the drum type washing machine 100 is used, the season, and the like. The drum type washing machine 100 may be configured such that the user sets the peak period of power demand.

  When the peak shift function is turned on by manual operation of the peak shift button 51, the control device 5 is executing the operation when the operation is performed during the set peak period of power demand. The angular acceleration lowering control is performed. As described above, according to the angular acceleration lowering control, the load on the motor 9 is reduced, and energy saving can be achieved. Therefore, according to the present embodiment, energy saving can be achieved in the operation performed when the peak shift function is turned on, and the advantage of the peak shift function is that the power consumption is reduced during the peak period of power demand. Can contribute.

  The driving course for performing the angular acceleration lowering control when the peak shift function is on may be all driving courses including the speed course or all driving courses excluding the speed course. Alternatively, only a predetermined driving course determined in advance may be used.

(Other embodiments)
The present embodiment is not limited to the above-described plurality of embodiments, and can be implemented by being appropriately modified or expanded without departing from the gist thereof. That is, for example, the above-described plurality of embodiments may be combined. In addition, driving courses with sufficient time from start of operation to completion of operation, short courses in which the time required from start of operation to completion of operation is shortened, and courses other than the short time course are It can be implemented with appropriate modifications according to the specifications.

  The drum type washing machine according to the present embodiment includes an outer box, a water tank supported by a vibration isolator inside the outer box, a drum disposed inside the water tank, and a liquid provided in the drum. An enclosure-type rotary balancer, a motor that rotates the drum, a control unit that controls the motor, and an operation unit that is manually operated. And when the said operation part is operated manually, the said control means is the angular acceleration reduction control which lowers | hangs the angular acceleration in the rotational speed area of the upper and lower vicinity including the rotational speed area where the said water tank resonates when the said operation part is operated manually. I do. According to this configuration, it is possible to select control for suppressing vibration by slowing the degree of increase in the rotational speed of the drum by manual operation by the user.

  As mentioned above, although several embodiment of this invention was described, these embodiment was shown as an example and is not intending limiting the range of invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  In the drawings, 1 is an outer box, 5 is a control device (control means), 6 is a water tank, 7 is a suspension, 9 is a motor, 10 is a drum, 15 is a rotary balancer, 31 is an operation unit, and 41 is an energy saving button (operation unit). ), 51 indicate peak shift buttons (operation units).

Claims (4)

An outer box,
A water tank supported by a vibration isolator inside the outer box;
A drum disposed inside the water tank;
A liquid-sealed rotary balancer provided on the drum;
A motor for rotating the drum;
Control means for controlling the motor;
An operation unit operated manually,
With
The control means performs angular acceleration lowering control for lowering the angular acceleration in the upper and lower rotation speed regions including the rotation speed region where the water tank resonates when the operation unit is manually operated. Drum type washing machine.   The control means is configured to control the angular acceleration lowering during execution of the selected driving course when a driving course having a sufficient time from the start of driving to the completion of driving is selected by manual operation of the operation unit. The drum type washing machine according to claim 1, wherein:   In the case where the peak shift function for reducing the power consumption in the peak period of power demand is selected by manual operation of the operation unit, the control means performs the operation in the peak period of the power demand. The drum type washing machine according to claim 1 or 2, wherein the angular acceleration lowering control is performed during execution.   When a driving course other than a short course in which the time required from the start of driving to the completion of driving is shortened is selected by manual operation of the operation unit, the control means is executing the selected driving course. The drum type washing machine according to any one of claims 1 to 3, wherein the angular acceleration lowering control is performed on the drum washing machine.

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