JP2012170686A - Drum-type washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drum-type washing machine capable of safely stopping in occurence of an unbalance malfunction in a dewatering process.SOLUTION: The drum type washing machine includes: a washing machine housing 41 for elastically supporting a wash tub unit 49 of a vibrating system; vibration detection means 78 provided in a wash tub 42 and capable of detecting vibration components in three-dimensional directions; rotational frequency detection means 90 for detecting a rotational frequency of a rotating drum 43; operation display means 79 including input setting means 80 and display means 96; alert means 87; and control means 82 for controlling each process. The control means 82, in a dewatering process, selects detection axes showing maximum values of vibration values in the three-dimensional directions of the wash tub unit 49 detected by the vibration detection means 78; and when vibration values detected by the vibration axes exceed first threshold values and become lower than second thresholds, the values being set per rotational frequency region, starts the dewatering process again; and when vibration values detected by the detection axes exceed the first threshold values and the second threshold values, stops the dewatering process to make a malfunction display and a malfunction alert. Accordingly, the washing machine can achieve high safety.

Description

  The present invention relates to a drum type washing machine for washing laundry contained in a rotating drum.

  Conventionally, a drum-type washing machine of this type has been proposed with a control system that detects the presence of an imbalance abnormality by controlling the vibration of the vibration system during dehydration and controls the subsequent stroke (for example, patents). Reference 1).

  FIG. 4 shows a flowchart of the determination and response in the case of an unbalance abnormality of the conventional drum type washing machine described in Patent Document 1.

  In FIG. 4, when the dehydration process starts in step 100, a draining operation is performed in step 101. Thereafter, in step 102, in order to loosen the laundry such as clothes that have been offset, the rotating drum is normally rotated and reversed at a predetermined rotational speed (for example, about 40 rpm). Next, in step 103, the laundry is slowly raised to a predetermined rotational speed (about 70 rpm) that allows the laundry to stick to the inner surface of the rotary drum. Thereafter, in step 104, control is performed to maintain a predetermined rotation speed (for example, about 80 rpm) lower than the primary resonance rotation speed for a predetermined time.

  At this time, the rotation unevenness, that is, the presence / absence of unbalance is detected. If there is an unbalance greater than or equal to a predetermined value, it is determined that the rotation unevenness is large and the balance state is bad. If N = 4 is not satisfied, the rotating drum is temporarily stopped in the next step 106, then 1 is added to the current N in step 107 and the process returns to step 102. When the operations from step 102 to 107 are repeated a predetermined number of times, that is, when N = 4 in step 105, it is considered that the unevenness of the laundry has not been eliminated in the loosening process of step 102, and the process proceeds to step 108. To do. In step 108, if N is less than 10, the process proceeds to step 110, a process of supplying water into the rotary drum and correcting the bias of the laundry is performed, and the process returns to step 101. If N is 10, it is considered that the unevenness of the laundry could not be resolved, the process proceeds to step 109, an unbalance abnormality is displayed, and the operation is stopped.

  After passing through step 104, an unbalance abnormality is determined by an output signal from the vibration detecting means at step 111. If an imbalance abnormality is detected, the process proceeds to step 105 and the same processing as described above is performed. If step 111 is passed, in step 112, an unbalance abnormality is determined from the output signal from the vibration detection means. If an unbalance abnormality occurs, the process proceeds to step 105 and the same processing as described above is performed. The same processing is performed after passing through step 112 and proceeding to step 113.

  When step 113 is passed, an unbalance abnormality is determined from the output signal from the vibration detection means at step 114. If the unbalance abnormality does not occur and is normal, the rotating drum is set to the maximum number of revolutions at step 115. And turn back to step 114 for determination. If it is normal, the routine proceeds to step 115 where the maximum rotational speed is reached. On the other hand, when the vibration output value becomes larger than the threshold value in step 114, that is, when it becomes NG, the routine proceeds to step 116 where the number of rotations on the spot is maintained, and after a predetermined time operation, the operation is performed in step 117. Stop and go to the next step of step 118.

JP 2009-213803 A

  However, with the above-described conventional configuration, for example, when clothes that are waterproof or water repellent such as outdoor clothes, that is, laundry that does not allow water to pass through or is difficult to pass through, are dehydrated properly. There was a problem that the balance state was detected and the operation could not be stopped safely.

  That is, when the laundry is dehydrated, the water dehydrated from the laundry may be blocked by the waterproof surface or the water-repellent surface and may not come out of the rotating drum. At this time, even if the laundry is in an unbalanced state in the rotating drum, the amount of moisture acts as a weight, so that the vibration system is relatively balanced. For this reason, the dehydration vibration of the rotating drum is small and it tries to start up to a high-speed rotation range, but if the posture of the laundry in the rotating drum changes even slightly due to the centrifugal force of dehydration, moisture will come out all at once and unbalance It becomes abnormal, and the loosening process is performed again. In the case of the laundry described above, this process is repeated many times due to its characteristics, and after a predetermined number of times of dehydration, it cannot be started up eventually, and only after a while, the operation stops. There has been a problem that a phenomenon occurs.

  The present invention solves the above-described conventional problems, and in the case of laundry such as the above-described outdoor clothing, it detects an imbalance abnormality caused by the characteristics of the clothing early and safely stops the operation. An object of the present invention is to provide a drum type washing machine that can be used.

  The present invention solves the above-described conventional problems, and includes a rotating drum formed in a bottomed cylindrical shape, a water tank that rotatably includes the rotating drum, a motor that rotationally drives the rotating drum, and the rotation A washing machine housing that elastically supports a vibration water tank unit including a drum, a water tank, a motor, and the like, a vibration detection means that can detect a vibration component in a three-dimensional direction provided in the water tank, and a rotation speed of the motor Rotation speed detection means for detecting the rotation speed of the rotating drum, operation display means comprising input setting means and display means, the motor and the like are controlled to perform each step of washing, rinsing, dehydration, etc. And a control means for controlling, wherein the control means selects a detection axis indicating the maximum vibration value in the three-dimensional direction of the water tank unit detected by the vibration detection means in the dehydration process, and the detection axis detects the detection axis. Shi When the vibration value exceeds the first threshold value set for each rotation speed range and falls below the second threshold value, dehydration activation is performed again, and the vibration value detected by the detection shaft is the first vibration value. When the threshold value exceeds the second threshold value and the second threshold value, the dehydration is stopped, and an abnormality is displayed by the display means.

  As a result, even for waterproof and water-repellent laundry such as outdoor clothing, it is possible to detect an imbalance abnormality caused by the characteristics of the clothing early and to safely stop driving. .

  The drum type washing machine of the present invention can realize safe dehydration control even for waterproof and water repellent laundry such as outdoor clothing.

The longitudinal cross-sectional view of the drum type washing machine in embodiment of this invention Block diagram of the drum type washing machine Control flow of OutDoor clothing course of the drum type washing machine Graph showing the relationship between the tank unit vibration value and the threshold during dehydration rotation of the course Control flow chart of conventional drum type washing machine

1st invention consists of the rotating drum formed in the bottomed cylindrical shape, the water tank which contains the said rotating drum rotatably, the motor which rotationally drives the said rotating drum, the said rotating drum, a water tank, a motor, etc. A washing machine housing that elastically supports a vibration water tank unit; a vibration detection means that can detect a vibration component in a three-dimensional direction provided in the water tank; and a number of rotations of the motor. A rotation speed detection means for detecting the rotation speed; an operation display means comprising an input setting means and a display means; and a control means for controlling each step of washing, rinsing, dehydration and the like by controlling the motor and the like, The control means selects a detection axis indicating the maximum value of the vibration value in the three-dimensional direction of the water tank unit detected by the vibration detection means in the dehydration process, and the vibration value detected by the detection axis is within a rotation speed range. Set every When the value exceeds the first threshold value and falls below the second threshold value, the dehydration start is performed again, and the vibration value detected by the detection shaft exceeds the first threshold value and the second threshold value. If the water is washed and water-repellent, such as outdoor clothing, the imbalance abnormality that occurs due to the characteristics of the clothing will be stopped. It is possible to achieve a high level of safety by detecting the state early and safely stopping the operation.
Hereinafter, embodiments of the present invention will be described with reference to the drawings. Further, the present invention is not limited by this embodiment.

(Embodiment 1)
FIG. 1 shows a longitudinal sectional view of a drum type washing machine in an embodiment of the present invention.

  In FIG. 1, a water tank 42 is swingably disposed inside a washing machine housing 41, and a rotating drum 43 is rotatably disposed in the water tank 42. A rotation shaft (rotation center shaft) 44 is provided in the horizontal direction at the rotation center of the rotating drum 43, and a motor 45 attached to the rotation shaft 44 in the vicinity of the back side of the water tank 42 is connected via a belt 46. The rotary drum 43 is rotated by 45 in the forward and reverse directions. Several protrusion plates 47 for stirring the laundry are provided on the inner wall surface of the rotating drum 43. In addition, a large number of water passage holes 48 are provided on the entire outer periphery of the rotating drum 43.

  The water tank 42, the rotating drum 43, the motor 45, and the like constitute a vibration water tank unit 49. The water tank unit 49 is formed by a plurality of spring bodies 50 from above the washing machine housing 41, and the washing machine. Anti-vibration is supported by a plurality of anti-vibration dampers 51 from the bottom of the housing 41.

  Further, the opening provided in the washing machine housing 41 on the front side of the water tub 42 is covered with a lid 52 so that the laundry can be opened and closed. By opening the lid 52, the laundry is put into and out of the rotary drum 43 through the clothing entrance 53. I can do it.

  In addition, this drum type washing machine has a function of automatically controlling the motor 45, the water supply system 54, the drainage system 55, and the water circulation system 56 according to the mode setting and control program to perform at least a washing process, a rinsing process, and a dehydrating process. is doing.

  The water supply system 54 includes a first water supply hose 59 or a second water supply hose by opening and closing the first electromagnetic valve 57 (first water supply means) or the second electromagnetic valve 58 (second water supply means). Water can be supplied from the water supply path 62 into the water tank 42 in a timely manner through the detergent storage 61 that passes through 60 and stores a detergent and a soft finish and stores a drawer (not shown) that can be pulled out from outside.

  The drainage system 55 collects lint from the outside through the drainage pipe 64 connected to the bottom of the water tank 42 when necessary, such as at the end of the washing process or at the end of the rinsing process, by driving the drainage pump 63. After passing through the detachable drainage filter 65, the drainage hose 66 arranged from the inside of the machine to the upper part outside the machine can be drained through the drainage pump 63.

  The water circulation system 56 circulates the water in the water tank 42 as necessary during the pre-washing process, the washing process, the rinsing process, and the like, thereby preventing the premature dissolution and unevenness of the detergent and improving the function of easy washing.

  The water circulation system 56 drives the circulation pump 67 to pass the washing water in the water tank 42 through the drainage filter 65 via the drainage pipe 64, and the inflow side path 68 to the circulation pump 67, the circulation pump 67 and Through the discharge side path 69 from the circulation pump 67, the water is repeatedly discharged into the rotary drum 43 as the circulating water indicated by the solid line arrow from the inner front outlet 70 of the water tank 42. A plurality of jet outlets 70 are provided in the circumferential direction, and the circulating water is discharged from all directions of the circumference.

  The recess 71 formed at the bottom of the water tank 42 is provided with a hot water heater (heating means) 72 such as a sheathed heater for heating the washing water in the horizontal direction. By discharging the washing water into the rotating drum 43 as described above, the washing water is sprinkled on the laundry and the washing water is circulated again. Since the heated washing water is sprinkled on the laundry, the molecular activity of the washing water is increased and the activation of the detergent is increased, so that the washing power can be increased and washing unevenness can be reduced. In the vicinity of the hot water heater 72, a temperature detection means 73 such as a thermistor for detecting the water temperature is provided.

  In addition, an air trap 74 is configured on the side wall of the outer periphery of the bottom of the outer tub 42 in communication with the drain pipe 64. The air trap 74 is provided inside the upper portion of the washing machine housing 41 by an air pipe 75, and is provided with a pressure sensor or the like. It is connected to the constructed water level detection means 76, and can detect the water level in a plurality of stages by the water pressure of the washing water supplied into the outer tub 42.

  In addition, the rear upper part of the detergent container 61 provided in the upper part of the washing machine housing 41 and the upper part of the water tank 42 are connected by a connecting hose 77, and the air in the water tank 42 is pressurized by the stroke operation operation. It plays the role of pulling out.

  In addition, vibration detection means 78 of an acceleration sensor that detects vibration of the water tank unit 49 is disposed on the rear surface of the upper surface of the water tank 42, and is not an acceleration in one direction, but front and rear (X axis direction), left and right (Y axis direction). ), The vibration in the three-dimensional direction in the vertical direction (Z-axis direction) is detected and the operation is controlled. This is because the actual vibration of the water tank unit 49 is not necessarily limited to one direction, and is therefore detected with high accuracy using a multi-axis acceleration sensor.

  The mode such as the driving course and various functions are selected by the user by inputting to the input setting means 80 from the operation display means 79 provided at the upper front of the washing machine housing 41, and inside the upper portion of the washing machine housing 41. The arranged control device 81 is displayed on the display means 96 (see FIG. 2) on the operation panel 79 based on the input information to notify the user.

  FIG. 2 is a block circuit diagram of the drum type washing machine in the embodiment of the present invention.

In FIG. 2, the control means 82 of the control device 81 is constituted by a microcomputer or the like, and starts operating when power is supplied from the commercial power supply 83 by turning on the power switch 84, a water level detection means 76, a temperature detection means 73, The output of the rotational speed detection means 90 for detecting the rotational speed of the rotary drum 43 to be connected by detecting the rotational speed of the cloth amount detection means 85, the vibration detection means 78, and the motor 45 is input to the input setting means 80. The setting contents are displayed on the display means 96 based on the contents set by the user's input, and the motor 45, the hot water heater 72, the second heater are connected via the load driving means 86 constituted by a bidirectional thyristor, a relay and the like. The operations of the first solenoid valve 57, the second solenoid valve 58, the drainage pump 63, the circulation pump 67, and the like are controlled to control the steps of washing, rinsing, and dehydration. If there is any abnormality in the operation, the display means 96 displays that it is abnormal and notifies the notification means 87. The input setting means 80 and the display means 96 constitute an operation display means 79.

  About the drum type washing machine comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  FIG. 3 is a control flowchart mainly describing the dewatering process of the OutDoor clothing course of the drum type washing machine according to the embodiment of the present invention. FIG. 4 is a diagram of the water tank unit vibration value and the threshold value during the dewatering rotation of the course. There is a graph representing the relationship, which will be described with reference to FIGS.

  3 and 4, first, the user opens the lid 52, puts the clothes into the rotating drum 43, and starts. When OutDoor clothes are selected and started (YES in step S1), the washing process (step S2) is started. ), Rinsing (1) process (step S3), rinsing (2) process (step S4) are performed, and the process proceeds to the dehydration process.

  In the dewatering process, the drainage pump 63 is driven to perform drainage (step S5). First, the motor 45 is driven in step S6 with the intention of loosening the cloth entangled in the rotary drum 43 during the easy washing process. Then, the rotating drum 43 is reversed left and right at a predetermined rotation speed (for example, about 50 r / min). Thereafter, the power is gradually increased to 400 r / min (step S7).

  In this start-up stage, the vibration value in the three-dimensional direction of the water tank unit 49 at 300 to 400 r / min is detected by the vibration detecting means 78, and a detection axis indicating the maximum value of the vibration value in the three-dimensional direction is detected in step S8. Select. Here, the Z-axis is selected, and in step 9, the vibration value in the Z-axis direction (vertical direction) of the water tank unit 49 is compared with the first threshold value a1 in the Z-axis direction in this rotational speed range. When it is larger than the first threshold value a1 (NO in step S9), the process proceeds to step S16 and further compared with the second threshold value a2 in this rotational speed range. In the subsequent steps, the vibration value in the Z-axis direction is controlled by comparing it with the threshold value.

  If the vibration value is smaller than the second threshold value a2 (YES in step S16), the rotation of the rotary drum 43 is stopped (step S20). If the number of stops is less than 20 times (YES in step S21), The process returns to step S6 to loosen the clothes. If the vibration value is larger than the threshold value a2 in step S16 (NO in step S16), it is determined that it is in an abnormal state and it is dangerous to start dehydration as it is, and the process proceeds to step S22 to stop dehydration. Then, it is displayed on the display means 96 that there is an abnormality, and is notified by the notification means 87.

  When the vibration value is smaller than the threshold value a1 in step S9 (YES in step S9), the vibration value is raised to 500 r / min (step S10). At this time, the vibration value of the water tank unit 49 at 400 to 500 r / min is detected by the vibration detecting means 78, and the vibration value is compared with the first threshold value b1 in this rotational speed range (step S11). When it is larger than the threshold value b1 (NO in step S11), the process proceeds to step S17, and further compared with the second threshold value b2 in this rotational speed range.

If the vibration value is smaller than the second threshold value b2 (YES in step S17), the rotation of the rotary drum 43 is stopped (step S20). If the number of stops is less than 20 (YES in step S21), The process returns to step S6 to loosen the clothes. If the vibration value is larger than the threshold value b2 in step S17 (NO in step S17), it is determined that it is an abnormal state and it is dangerous to start dehydration as it is, and the process proceeds to step S22 to stop dehydration. Then, it is displayed on the display means 96 that there is an abnormality, and is notified by the notification means 87.

  If the vibration value is smaller than the threshold value b1 in step S11 (YES in step S11), the vibration value is raised to 600 r / min (step S12). At this time, the vibration value of the water tank unit 49 at 500 to 600 r / min is detected by the vibration detecting means 78, and the vibration value is compared with a threshold value c1 in this rotational speed range (step S13). When larger than the threshold value c1 (NO in step S13), the process proceeds to step S18, and further compared with the threshold value c2 in this rotation speed range.

  If the vibration value is smaller than the threshold c2 (YES in step S18), the rotation of the rotary drum 43 is stopped (step S20). If the number of stops is less than 20 (YES in step S21), the clothing is tangled. In order to loosen, the process returns to step S6. If the vibration value is larger than the threshold value c2 in step S18 (NO in step S18), it is determined that it is an abnormal state and it is dangerous to start the dehydration as it is, and the process proceeds to step S22 to stop dehydration. Then, it is displayed on the display means 96 that there is an abnormality, and is notified by the notification means 87.

  If the vibration value is smaller than the threshold c1 in step S13 (YES in step S13), the vibration value is raised to 700 r / min (step S14). At this time, the vibration value of the water tank unit 49 at 600 to 700 r / min is detected by the vibration detecting means 78, and the vibration value is compared with a threshold value d1 in this rotational speed range (step S15). When it is larger than the threshold value d1 (NO in step S15), the process proceeds to step S19, and further compared with the threshold value d2 in this rotation speed range.

  If the vibration value is smaller than the threshold value d2 (YES in step S19), the rotation of the rotary drum 43 is stopped (step S20). If the number of stops is less than 20 times (YES in step S21), the clothing is tangled. In order to loosen, the process returns to step S6. If the vibration value is larger than the threshold value d2 in step S19 (NO in step S19), it is determined that it is an abnormal state and it is dangerous to start the dehydration as it is, and the process proceeds to step S22 to stop dehydration. Then, it is displayed on the display means 96 that there is an abnormality, and is notified by the notification means 87.

  If the vibration value is smaller than the threshold value d1 in step S15 (YES in step S15), since the unbalanced state is in the normal range, the vibration is started up to 800 r / min, which is the maximum dewatering speed of the OutDoor clothing course (step S23). ), Dehydration is performed for a predetermined time (step S24), and the dehydration process is completed.

  In step S21, if the number of rotations of the rotating drum 43 reaches 20 after entering the dehydration process, the tangling of the clothes will not be eliminated even if the rotation is continued further, and the dehydration is repeated. It is determined that it is difficult, the process proceeds to step S22, the dehydration is stopped, the display means 96 displays that it is abnormal, and the notification means 87 notifies.

As described above, in the present embodiment, the detection axis indicating the maximum value of the vibration value in the three-dimensional direction of the aquarium unit detected by the vibration detection means is selected, and the vibration value detected by the detection axis is the rotational speed. When the first threshold value and the second threshold value set for each area are exceeded, the dehydration is stopped, the abnormality display by the display means and the abnormality notification by the notification means are performed, so that waterproof processing such as outdoor clothing is performed. Even for laundry that has been subjected to water-repellent finishing, it is possible to realize a high level of safety by detecting an unbalanced abnormal state caused by the characteristics of the clothing at an early stage and stopping the operation safely.

  As described above, the drum-type washing machine according to the present invention can be safely dehydrated even with waterproof or water-repellent outdoor clothing by the dehydration control method. It can be applied to uses such as washing machines.

41 Washing Machine Housing 42 Water Tank 43 Rotating Drum 45 Motor 49 Water Tank Unit 78 Vibration Detection Means 79 Operation Display Means 80 Input Setting Means 82 Control Means 85 Display Means 87 Notification Means 90 Rotation Number Detection Means

Claims (1)

A rotating drum formed in a bottomed cylindrical shape, a water tank that rotatably includes the rotating drum, a motor that rotationally drives the rotating drum, and a vibrating water tank unit including the rotating drum, the water tank, and the motor. A washing machine housing elastically supported in a swingable manner, vibration detecting means provided in the water tub for detecting vibration components in a three-dimensional direction, and rotation for detecting the rotation speed of the rotating drum by detecting the rotation speed of the motor. A number detection means, an operation display means comprising an input setting means and a display means, and a control means for controlling each step such as washing, rinsing and dehydration by controlling the motor and the like, In the process, a detection axis indicating the maximum value of the vibration value in the three-dimensional direction of the water tank unit detected by the vibration detection means is selected, and the vibration value detected by the detection axis is set for each rotation speed range. Threshold When it exceeds and falls below the second threshold, the dehydration start is performed again, and when the vibration value detected by the detection axis exceeds the first threshold and the second threshold, dehydration is stopped. A drum-type washing machine that displays an abnormality by the display means.