JP2016214609A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washing machine capable of suppressing the generation of a motor lock even in a washing course for washing delicate clothing.SOLUTION: The washing machine comprises a motor rotation speed detection means and motor lock detection means based on the detection results and has a washing course for washing delicate clothing. In the washing course, a motor rotation speed is set to be lower than in a normal washing course. A control is performed such that, when a motor lock is detected in a washing step or a rinsing step of the washing course, the motor rotation is once suspended, additional water is supplied, and operations of the washing step or the rinsing step of the washing course are restarted.SELECTED DRAWING: Figure 3

Description

  Embodiments described herein relate generally to a washing machine.

  Conventionally, in a washing machine, a user performs washing by manually setting a water level, or a washing machine performs washing by automatically determining a water supply amount. In a washing course for washing delicate clothing (laundry), control is performed so as not to damage the clothing by lowering the drive motor power. In this case, for example, when the amount of water (water level) is low, an overload is applied to the motor, which may cause motor lock.

JP-A-5-92097

  Therefore, a washing machine that can suppress the occurrence of motor lock even in a washing course for washing delicate clothing is provided.

  The washing machine according to the embodiment includes a washing course for washing delicate clothes, which includes a motor rotation number detection means and a motor lock detection means based on the detection result. In the washing course, the motor rotation speed is set lower than in the normal washing course, and when motor lock is detected in the washing course or rinsing process of the washing course, the motor rotation is temporarily stopped, additional water is supplied, and washing is performed again. A control for starting the operation of the washing process or the rinsing process of the course is performed.

1 is a longitudinal side view schematically showing an overall configuration of a washing machine according to an embodiment. The block diagram which shows schematic structure of the washing machine which concerns on embodiment. The figure which showed the control in the washing machine which concerns on embodiment with the flowchart An example of a motor control pattern in a washing course for washing delicate clothing according to an embodiment An example of motor control pattern in a normal laundry course It is a figure which shows the content of the additional water supply in embodiment, (a) is an example which performs additional water supply in steps, (b) is an example which supplies water to a maximum water level at a stretch. (A) is an example in which the rise time of the motor rotational speed is changed short, and (b) is an example in which the motor rotational speed is changed high.

  Hereinafter, a washing machine according to an embodiment will be described with reference to the drawings. A washing machine 100 shown in FIG. 1 is a so-called vertical type washing machine configured such that, for example, a rotation center axis of a rotating tub extends in a vertical direction. Inside the outer box 101 constituting the outer shell of the washing machine 100, a bottomed cylindrical water tank 102 having an open upper surface is elastically supported by an elastic suspension mechanism 103. Inside the water tank 102, a bottomed cylindrical rotating tank 104 having an open upper surface is rotatably provided.

  The rotating tank 104 has a body portion made of a metal body member 104a made of, for example, stainless steel, and a bottom portion made of, for example, a synthetic resin bottom member 104b. A reinforcing member 104c for reinforcing the bottom of the rotating tub 104 is provided below the bottom member 104b. The reinforcing member 104c is made of metal such as a stainless plate. The rotating tub 104 is configured to rotate about a substantially vertical axis, and is a washing tub for washing clothes (laundry), a washing tub for rinsing clothes, and a dehydration process for dewatering clothes. Also used as a water tank.

  The rotating tank 104 has a plurality of holes 105a in the peripheral wall portion thereof. These holes 105a pass through the peripheral wall portion of the rotating tub 104 and are configured to allow water flow and ventilation. In the drawing, only a part of these holes 105a is shown. The rotating tank 104 has a large number of protrusions 105b on its peripheral wall. The protrusion 105b protrudes inward of the rotary tank 104, for example. A synthetic resin balance ring 106 in which a liquid such as salt water is sealed is attached to the upper part of the rotating tank 104. The balance ring 106 is screwed and fixed from the outer surface side of the rotating tub 104 by a metal screw 106a made of, for example, stainless steel. A synthetic resin stirring body 107 is rotatably provided at the bottom of the rotary tank 104.

  A drainage path 108 is provided in the lower part of the water tank 102. The drainage passage 108 is provided with a drainage valve 109. When the drainage valve 109 is opened, the water in the water tank 102 is discharged outside the apparatus. An air trap 110 for detecting the water level is provided at the bottom of the water tank 102. A water level sensor 34 (see FIG. 2) (not shown) is connected to the air trap 110 via an air tube 111. The water level sensor 34 is configured by, for example, a pressure sensor, and detects the water level in the water tank 102 based on the pressure in the air trap 110.

  A drive mechanism 113 is provided at the center of the lower part of the water tank 102. The drive mechanism unit 113 includes a motor capable of variable speed drive, a clutch mechanism, a speed reducer, a brake device, and the like. The drive mechanism 113 includes a dehydrating shaft 113 a for mainly transmitting the rotational force of the motor to the rotating tub 104 and a washing shaft 113 b for mainly transmitting the rotational force of the motor to the stirring body 107. The dehydrating shaft 113a is an example of a rotating tank rotating shaft, and the washing shaft 113b is an example of an agitator rotating shaft. During the washing process or the rinsing process, the drive mechanism 113 transmits the rotational force of the motor to the agitator 107 via the washing shaft 113b by decelerating by the speed reducer and switching the clutch mechanism. During the dehydration stroke, the driving mechanism 113 transmits the rotational force of the motor to the rotating tank 104 and the stirring body 107 at high speed via the dehydrating shaft 113a by switching the clutch mechanism without decelerating by the reduction gear. .

  A top cover 122 is provided on the top of the outer box 101. The top cover 122 is provided with, for example, a foldable lid 126 that can be opened and closed to open and close the clothing doorway. A tank cover 102 a is attached to the upper part of the water tank 102. An operation panel 22 is provided at the front portion of the top cover 122. A control device 30 that controls the overall operation of the washing machine 100 is provided on the back side of the operation panel 22. A water supply mechanism (not shown) that supplies water from the water tap into the water tank 102 is provided at the rear portion of the top cover 122.

  A circular concave region in which the stirring body 107 is disposed is provided at the inner bottom portion of the rotating tank 104. In addition, a pump chamber 118 is formed between the concave region and the stirring body 107. Here, the stirring body 107 has a disc shape having a protrusion on the upper surface for generating a rotating water flow. Moreover, the stirring body 107 has a plurality of water passage holes that vertically penetrate the plate surface. In addition, a plurality of pump blades 107 a are integrally provided on the lower surface of the stirring body 107. The pump blade 107a has a thin plate shape that extends radially from the central portion substantially in the radial direction. A plurality of outlets for allowing water to flow out from the pump chamber 118 are provided on the outer peripheral portion of the pump chamber 118. In this case, on the outer peripheral portion of the pump chamber 118, for example, three outlets are provided at three positions that are 120 degrees apart.

  A plurality of water passages 119 are provided on the side wall of the rotating tub 104 so as to extend upward from the respective outlets. The water flow section 119 is for pumping water flowing out from the pump chamber 118. In this case, one pump chamber 118 is shown in FIG. 1, but actually three water passages 119 are provided corresponding to the three outlets. The water passage 119 has a water spout 119a in the upper part thereof. When the stirring body 107 rotates in the pump chamber 118, the water in the rotating tank 104 is discharged from the outlet of the pump chamber 118 toward the outer peripheral direction. Further, the water rises in the water passage 119 and is sprinkled into the rotary tank 104 from the water spout 119a. Thereby, water comes to be supplied into the rotary tank 104 from the water spout 119a in a shower shape.

  The water passage 119 shown in FIG. 1 is provided at a position facing the joint of the rotating tub 104. A disinfectant unit 120 is detachably attached to a lower portion of the water passage 119 provided to face the joint. This disinfectant unit 120 includes an unillustrated disinfectant inside a disinfectant case made of, for example, a resin material. The disinfectant case is provided with a large number of holes (not shown), and a part of the water flowing in the water passage 119 flows into the disinfectant case. Thereby, the disinfectant dissolves in the water flowing into the disinfectant case, and the water containing the disinfecting component flows through the water passage 119 and is sprinkled from the water spout 119a.

  FIG. 2 is a block diagram illustrating a schematic configuration of the washing machine 100 according to the embodiment. The washing machine 100 has a control device 30. The control device 30 has a CPU, RAM, ROM, storage device, and the like. The control device 30 controls the washing machine 100 by executing, for example, a program stored in the ROM, realizes various functions, transmits and receives signals to and from the following parts, and performs control as necessary. As the storage device, for example, a flash memory or the like can be used. For example, user settings are stored.

  The control device 30 is connected to a motor 46, a drain valve 48, a water supply valve 50, a compressor 52, a blower 54, and the like. Although detailed explanation is omitted, the motor 46 is for rotating a rotating tub (not shown) provided in the washing machine 100. The drain valve 48 is for draining water in a water tank (not shown) to the outside of the apparatus. The water supply valve 50 opens and closes communication between the water supply port 20 and a water tank (not shown) to supply water into the water tank.

  The control device 30 is connected to devices such as a temperature sensor 32, a water level sensor 34, a rotation sensor 36, a door sensor 38, and a human sensor 44. Although a detailed description of each is omitted, the temperature sensor 32 detects the temperature around the washing machine 10. The water level sensor 34 detects the water level in the water tank (water level detection means). The rotation sensor 36 detects a rotation position and a rotation speed of a rotation tank (not shown) (rotation speed detection means, rotation speed detection means). The door sensor 38 detects opening / closing of the door 12. The human sensor 44 is a device for detecting the presence of a person, and any human sensor such as a radio wave type, an ultrasonic type, or an infrared type may be used.

  Further, the control device 30 has an operation panel 22. On the operation panel 22, an operation unit and a display unit (not shown) are arranged. This operation panel 22 is a display unit for displaying various information such as display of setting contents of the washing machine 100 and display of driving conditions, and operation for selecting a driving course and manually setting a water level. It is also a department.

  FIG. 3 is a flowchart illustrating control in the washing machine 100 according to the embodiment. Control of the washing machine 100 is performed by the control device 30. First, when the user operates a power switch (not shown) on the operation panel 22 of the washing machine 100 and turns on the power (S301), the operation panel 22 is displayed for setting a washing course, and the user performs washing accordingly. The course is set (S302), and then the water level is set (S303). Next, when the user presses the start button (S304), the washing machine 100 detects the weight of the clothes (S305) and determines the target water level (S306). For example, the weight of the clothes can be determined by rotating the rotating tub 104 to a predetermined rotational speed, and the time required for the rotation, and then stopping the rotation of the rotating tub 104 by the motor 46 and rotating the rotating tub 104 by inertia. It is detected by a method of calculating from the time required for the rotation speed of 104 to fall to a predetermined rotation speed. That is, the weight of clothing is detected by the rotational load of the motor 46. In this case, the control device 30 performs the above calculation, and the control device 30 serves as a weight detection means.

  Next, the user manually sets the water level for the target water level determined by the washing machine 100 (S307). This is a mode for re-adjusting the water level according to the user's preference and can be skipped if not necessary. At this time, the washing machine 100 may be controlled so that water is supplied based on the target water level, even if the water level is manually set by the user.

  In addition, the washing machine 100 may perform control so as to accept only the adjustment for increasing the water level in the manual adjustment of the water level, and in this case, the setting for decreasing from the target water level determined in S306 is not accepted. To implement. Alternatively, step S303 for adjusting the water level before the start of the washing course or step S307 for adjusting the water level after determining the target water level may be deleted, and control not accepting manual setting of the water level by the user may be performed. Good. In this case, water is supplied based on the target water level determined based on the weight detection of the clothes.

  Next, the washing machine 100 proceeds to the washing process (S308). If it transfers to a washing process, water will be supplied to the water level set by S306 or S307, and then a washing process will be started (S308). In the washing process, the control device 30 controls the drive mechanism unit 113 according to a preset drive pattern to rotate the rotating tank 104 and the stirring body 107.

  Here, a control pattern for the drive mechanism unit 113 (motor 46) of the control device 30 will be described. FIG. 4 shows a control pattern of the motor 46 in a washing course for washing delicate clothes according to the embodiment (hereinafter referred to as a delicate washing course), (a) shows an example of control at a high water level, (b). Is an example of control at low water levels. FIG. 5 shows a control pattern of the motor 46 in a normal washing course, where (a) shows an example of control at a high water level, and (b) shows an example of control at a low water level. In both cases, the motor 46 is controlled in the forward direction (forward) → stop (stop) → reverse direction (counter), and is driven by repeating this for a predetermined time. The rise is a time that is controlled to increase the rotational speed of the motor 46 to a predetermined rotational speed, and the falling is a time that the rotational speed of the motor 46 is decreased from a predetermined number of times to a stop.

  At the high water level of the normal washing course shown in FIG. 5, the set rotational speed of the motor 46 is, for example, 150 rpm, the rotation rise time is, for example, 0.3 seconds, and the fall time is, for example, 0.2 seconds. At the low water level, the set rotational speed of the motor 46 is, for example, 50 rpm, the rotation rising time is, for example, 0.2 seconds, and the falling time is, for example, 0.2 seconds.

  On the other hand, in the delicate washing course shown in FIG. 4, the set rotational speed of the motor 46 is, for example, 30 rpm at both the high water level and the low water level, which is lower than the rotational speed shown in FIG. Further, the rise time of rotation of the motor 46 is, for example, 2.5 seconds, which is longer than the rise time in the normal washing course shown in FIG. The fall time is, for example, 1.0 second. That is, in the delicate washing course, the set number of revolutions is lowered and the rise time and fall time are set longer to raise the number of revolutions slowly, lower the number of revolutions during washing, and gently The control to lower is performed. This suppresses damage to clothing.

  Next, returning to FIG. 3, the description of the flowchart of the control in the washing machine 100 according to the embodiment is continued. After the washing process is started (S308), the washing machine 100 determines whether or not the washing process is completed (S309). Here, if the washing process is completed (S309: YES), the process proceeds to the next dehydration process (S317). If the washing process is not completed (S309: NO), the washing process is continued. In the washing process, the driving mechanism 113 is controlled by the control pattern according to the above-described embodiment, and the washing process is performed.

  In the delicate laundry course in the embodiment, the set rotational speed is lower than usual and the startup time is long. That is, the motor 46 is controlled by reducing the power applied to the drive mechanism unit 113 (motor 46). Therefore, when the amount of water with respect to the clothes is small, when the clothes come into contact with the stirring body 107, there is a tendency that the movement of the stirring body 107 is loaded and the motor is easily locked.

  Next, the washing machine 100 detects the motor lock while performing the washing process (S310). Here, the motor lock is a case where, for example, three consecutive stoppages of the motor 46 are detected during at least one of forward / reverse rotations during the same washing process or the same rinse process. This counts as one motor lock. It does not necessarily have to occur continuously in the forward / reverse rotation control of the motor 46. The motor lock is detected by the control device 30 (motor lock detection means). The same applies to the motor lock in the rinsing process described later.

  If the motor lock is not detected (S310: No), the process returns to the washing process. If the washing process is not completed (S309: NO), the washing process is continued, and if the washing process is completed (S309). : YES), the process proceeds to the next dehydration process (S317), and further proceeds to the rinse process (S318).

  On the other hand, when the motor lock is detected (S310: Yes), the washing machine 100 determines whether or not the occurrence of the motor lock has reached a predetermined number of times (for example, three times) (S311). If the motor lock has occurred a predetermined number of times (for example, 3 times) (S311: Yes), error processing is performed (S312). When the motor lock occurs a predetermined number of times (for example, 3 times), it is determined that it is difficult to avoid the motor lock or that the motor 46 or the like has failed. In this case, the process proceeds to the error processing (S312) described above, and for example, a repair engineer displays an error code indicating that it is necessary to check and repair the failure, and performs control to stop the operation of the washing machine 100. Do.

  On the other hand, when the occurrence of the motor lock is less than the predetermined number of times (S311: NO), the washing machine 100 determines whether or not the water level stored in the water tank 102 is the highest water level (S313). When the water level stored in the water tank 102 is the highest water level (S313: YES), the process returns to the washing process and the washing process is completed (S309: YES), or the motor lock frequency is generated a predetermined number of times (S311: YES), error processing is performed (S312), and this is repeated until the operation of the washing machine 100 is stopped.

  On the other hand, when the water level stored in the water tank 102 is lower than the maximum water level (S313: No), the motor 46 is temporarily stopped (S314), and additional water supply is performed (S315). In the additional water supply, for example, as shown in FIG. 6A, a predetermined amount of water set in advance can be additionally supplied every time the motor lock is detected. In this case, the additional water supply can be performed a plurality of times until the motor lock state is released or the maximum water level is reached. During the additional water supply, the motor 46 is temporarily stopped, and stirring (water flow) in the water tank 102 by the stirring body 107 is stopped.

  Thereafter, the number of times of motor lock is reset (S316), and the process returns to the washing process. Hereinafter, this is repeated until the washing process is completed (S309: YES), the occurrence of motor lock is a predetermined number of times (S311: YES), an error occurs (S312), or the operation of the washing machine 100 is stopped.

  As shown in FIG. 6B, in the additional water supply, instead of the method described in FIG. 6A, the water supply is performed a plurality of times until the motor lock state is released with the preset water supply amount, as shown in FIG. 6B. You may supply additional water at a stretch to the highest water level that can be stored in 102.

  Next, after the rinsing process is started through the dehydration process (S317) (S318), when the rinsing process is completed (S319: YES), the process proceeds to the dehydration process (S320), and the washing course process is completed. To do.

  On the other hand, if the rinsing process has not ended (S319: NO), the washing machine 100 determines whether or not a motor lock has been detected (S321). When the motor lock is not detected (S321: NO), the process returns to the rinsing process and is repeated until the rinsing process is completed (S319: YES).

  On the other hand, when the motor lock is detected (S321: YES), the washing machine 100 further determines whether the motor lock has occurred a predetermined number of times (for example, three times) (S322). If the motor lock has occurred a predetermined number of times (S322: Yes), error processing is performed (S323). The content of the error processing here is the same as the error processing in S312.

  If the motor lock has not occurred a predetermined number of times (S322: NO), the washing machine 100 determines whether or not the water level stored in the water tank 102 is the highest water level (S324). When the water level stored in the water tank 102 is the highest water level (S324), the process returns to the rinsing process and the rinsing process is completed (S319: YES), or the motor lock frequency is generated a predetermined number of times (S322: YES). This is repeated until error processing is performed (S323) and the operation of the washing machine 100 is stopped.

  On the other hand, when the water level stored in the water tank 102 is lower than the maximum water level (S324: NO), the motor 46 is temporarily stopped (S325), and additional water supply is performed (S326). In the additional water supply, for example, a predetermined amount of water set in advance is supplied. Thereafter, the number of times of motor lock is reset (S327), and the process returns to the rinsing process again. Hereinafter, this is repeated until the rinsing process is completed (S319: YES), the number of occurrences of motor lock becomes a predetermined number (S322: YES), an error occurs (S323), and the washing machine 100 stops.

  In addition, in addition water supply, it replaces with additional water supply with the preset water supply amount, and as shown in FIG.6 (b), you may supply water at a stretch to the highest water level which can be stored in the water tank 102. During the additional water supply, the motor 46 is temporarily stopped, and stirring (water flow) in the water tank 102 by the stirring body 107 is stopped.

  In the rinsing process (S318 to S327), an example in which the same control as the washing process (S308 to S316) is performed when the motor lock occurs has been shown, but the control may be performed as follows. That is, when the motor lock is detected in the washing process and additional water supply is performed until the motor lock can be suppressed, the final water level at which the motor lock is no longer detected is stored, and the water level from the beginning in the rinsing process is stored. It is good also as supplying water with. In this way, the occurrence of motor lock in the rinsing process can be suppressed in advance, and the overall time required for the washing course can be shortened.

The effects of the washing machine 100 according to the first embodiment described above are summarized as follows.
According to the washing machine 100 according to the present embodiment, when the motor lock is detected in the washing process or the rinsing process of washing the delicate clothes, the motor rotation is temporarily stopped, and additional water supply is performed. It is configured to perform control for starting the operation of the washing course or the rinsing process of the washing course again. Here, the additional water supply may be an additional water supply of a predetermined amount of water, or an additional water supply at a stretch to the highest water level.

  Thereby, since the water level stored in the water tank 102 can be made high, the load with respect to the stirring body 107 (motor 46) reduces, and a motor lock can be suppressed. In the case of a method in which a predetermined amount of water is additionally supplied a plurality of times, the minimum additional water supply that can suppress motor lock can be performed, which can contribute to water saving. Further, when additional water is supplied to the maximum water level at a stretch, it is possible to save time until the motor lock state is released, which can contribute to shortening the time spent on the washing course and thus reducing power consumption.

  Moreover, according to the washing machine 100 which concerns on this embodiment, the weight of the garment thrown into the washing machine 100 was detected, the target water level was determined based on this weight, and the user set the water level manually after that. Even in such a case, the water supply is performed according to the determined target water level. As a result, even if the amount of water (water level) is set to a low level by the user's manual setting, water is supplied so that the target water level is determined based on the weight of the clothing, so operation with reduced motor lock is achieved. Is possible.

  In addition, according to the washing machine 100 according to the present embodiment, the manual setting of the water level by the user is not allowed before the start of the washing course, and the washing machine 100 is put into the washing machine 100 after the start of the washing course for washing delicate clothes. The weight of clothing is detected, and water is supplied based on a target water level determined based on the weight. Thereby, since water is supplied with an appropriate amount of water based on the weight detection by the washing machine 100, it is possible to operate while suppressing the motor lock.

  Moreover, according to the washing machine 100 which concerns on this embodiment, after determining a target water level, it is comprised so that only the change which raises a water level may be permitted in the manual setting of the water level by a user. Accordingly, since manual setting for lowering the water level is not accepted, washing can be performed at an appropriate or higher water level, so that operation with motor lock suppressed is possible.

  Moreover, according to the washing machine 100 which concerns on this embodiment, when a motor lock is detected by the washing process, it controls so that the driving conditions changed in the washing process may be maintained in the subsequent rinsing process. As a result, the rinsing process is carried out by taking over the conditions (in which the water level is increased, the rise time of the motor 46 is shortened, and the rotation speed is increased) that can suppress the motor lock in the washing process. Operation with the lock suppressed is possible.

  Moreover, according to the washing machine 100 which concerns on this embodiment, when the motor lock is detected predetermined times, it is comprised so that the control which stops the driving | operation of the said washing course may be performed. Thereby, when the washing machine 100 is abnormal, the process proceeds to error processing, and the operation of the washing machine 100 can be stopped reliably.

(Second Embodiment)
Next, a second embodiment will be described. In the second embodiment, in the delicate washing course, when motor lock is detected in the washing process or the rinsing process, the following control is performed instead of the additional water supply (S315) in FIG. That is, as shown in FIG. 7A, the rise time of the rotational speed of the motor 46 is shortened. FIG. 7A shows an example of control in which the rise time is changed from 2.5 seconds to 1.5 seconds. Performing control for shortening the rise time of the rotational speed of the motor 46 means performing control for increasing the rotational speed to the target rotational speed in a shorter time, that is, giving the motor 46 more power. Will give. As a result, the low rotation state of the motor 46 can be removed in a shorter time, so that the operation with the motor lock suppressed is possible.

  Further, as shown in FIG. 7B, control for increasing the rotational speed of the motor 46 may be performed. FIG. 7B shows an example in which the rotational speed is increased from 30 rpm to 40 rpm. Performing control to increase the rotational speed of the motor 46 gives more power to the motor 46. Thereby, since the rotational torque of the motor 46 rises, the driving | operation with which the motor lock | rock was suppressed is attained. The number of rotations of the motor 46 may be changed higher each time a motor lock is detected. For example, the control may be executed to increase the rotational speed sequentially, such as 40 rpm for the first motor lock, 50 rpm for the second, and 60 rpm for the third.

  Further, the control for shortening the above-described rise time and the control for increasing the rotation speed may be used in combination. Thereby, motor lock can be more effectively suppressed. Further, for example, when the motor lock is detected in the washing process and the rise time of the motor 46 is changed short, or when the rotation speed is changed high, the operating conditions changed in the washing process in the subsequent rinsing process are changed. Control may be performed while maintaining. Thereby, generation | occurrence | production of the motor lock in a rinse process can be suppressed, and the whole time required for a washing course can be shortened.

  In the rinsing process (S318 to S327), when the motor lock occurs, an example of performing the same control as the washing process (S308 to S316) has been shown, but the control may be performed as follows. That is, when the motor lock is detected in the washing process and the rise time is changed shortly until the motor lock can be suppressed, or when the motor 46 rotation speed is increased, the final rise time when the motor lock is not detected. In addition, the rotational speed of the motor 46 may be stored, and the operation may be performed at the start-up time and / or the rotational speed of the motor 46 from the beginning in the rinsing process. In this way, the occurrence of motor lock in the rinsing process can be suppressed in advance, and the overall time required for the washing course can be shortened.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the 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, 30 is a control device (motor lock detection means), 31 is a water level sensor, 36 is a rotation sensor (rotation speed detection means), 46 is a motor, 100 is a washing machine, 102 water tank, and 107 agitator.

Claims (8)

In a washing machine having a washing course for washing delicate clothing, comprising: a motor rotation speed detection means; and a motor lock detection means based on a detection result of the rotation speed detection means.
In the washing course, the motor rotation speed is set lower than in a normal washing course,
When a motor lock is detected in the washing process or the rinsing process of the washing course, the motor rotation is temporarily stopped, additional water supply is performed, and the washing process or the rinsing process of the washing course is started again. Washing machine.   In the washing course, the weight of clothes put into the washing machine is detected, the target water level is determined based on the weight, and the target water level is manually set by the user after that, The washing machine according to claim 1, wherein water is supplied according to a water level.   The manual setting of the water level by the user is not allowed before the start of the washing course, and after the start of the washing course, the weight of clothes put into the washing machine is detected, and the target water level determined based on the weight is detected. The washing machine according to claim 1 or 2, wherein water is supplied based on the water.   The washing machine according to any one of claims 1 to 3, wherein after the target water level is determined, only a change that raises the water level is allowed in a manual setting of the water level by a user.   The washing machine according to any one of claims 1 to 4, wherein after the motor lock is detected, control is performed to change the rise time of the motor rotation speed in the washing process or the rinsing process to be shortened.   The washing machine according to any one of claims 1 to 5, wherein after the motor lock is detected, control is performed to change the motor rotation speed to a higher value in the washing process or the rinsing process.   The washing machine according to any one of claims 1 to 6, wherein when a motor lock is detected in a washing process, control is performed to maintain the operating conditions changed in the washing process in a subsequent rinsing process. The washing machine according to any one of claims 1 to 7, wherein when the motor lock is detected a predetermined number of times, control for stopping the operation of the washing course is performed.

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