JP4793403B2 - Washing machine - Google Patents

Description

  The present invention relates to a washing machine that automatically operates a series of washing, rinsing, and dehydration processes.

  Conventionally, the rinsing process of this type of washing machine has been configured to repeat the same operation twice with a drainage process-intermittent dehydration process-dehydration process-brake process-water supply process-stirring process as one group (for example, , See Patent Document 1).

Among the above-mentioned single drainage process-intermittent dehydration process-dehydration process-brake process-water supply process-stirring process, the intermittent dehydration process is basically a part of the dehydration operation, and the dehydration speed is increased step by step. The detergent liquid is efficiently squeezed out of the object and smoothly transferred to the dehydration operation. In this intermittent dewatering process, there is an unbalanced state due to factors such as the labyrinth of the laundry, and imbalance detection works. As a result, the motor may start up poorly, and in any case, the dehydration operation is temporarily interrupted, and after the modified rinsing process consisting of "water supply process-agitation process-drainage process" The operation was continued after returning to the intermittent dehydration process. Even if this correction rinsing process is repeated a plurality of times for each abnormality detection, if an unbalance abnormality or a motor start failure abnormality occurs, the sequence is stopped and each abnormality is displayed to notify the user.
Japanese Patent Application Laid-Open No. 5-49782

  However, in recent years, the number of cases where a waterproof pan is used in installing a washing machine has increased, and if the drain hose is not properly attached to the drain groove of the waterproof pan, the lint of the clothing may not be sufficiently drained. As a result, the drainage groove of the waterproof pan was clogged with lint, and the drainage capacity was extremely reduced.

  And in the above conventional washing machine, when the motor starting failure abnormality due to the lint clogging of the drainage groove as described above occurs, the problem is difficult for the user to identify the cause, and this problem does not solve the lint clogging It had the problem of occurring as long as it was stationary.

  The present invention solves the above-mentioned conventional problems, and when a motor start failure abnormality occurs during dehydration, if the cause is drain lint clogging, the user is warned of the drain lint clogging. The purpose is to solve the problem.

In order to achieve the above object, the present invention provides a main body, a water receiving tub elastically supported by the main body, a washing and dehydrating tub contained in the water receiving tub and containing laundry, and the washing and detaching A stirring blade provided rotatably at the inner bottom of the water tub, a motor for driving the washing tub / dehydration tub and the stirring wing, water supply means for supplying water into the washing / dehydration tub, and a water receiving tub Drainage means for draining water, water level detection means for detecting the water level in the water receiving tub, unbalance detection means for detecting the unbalanced state of the laundry in the washing and dewatering tub, and the rotational speed of the motor The motor, the water supply means, with the rotational speed detection means for detecting the pressure, the storage means for storing the number of times of abnormality detected in a series of operations, the water level detection means, the unbalance detection means, the rotational speed detection means, etc. And drainage means And a control means for sequentially and automatically operating a series of washing, rinsing and dehydration processes, wherein the control means detects an unbalance abnormality which is an unbalanced state of the laundry by the unbalance detection means in the dehydration operation. When it is detected, or when it is determined that the motor start failure is abnormal due to the output of the rotation speed detection means, the number of times the unbalance abnormality and motor start failure abnormality are detected in the storage means When the addition of the number of times of abnormality detection is less than the predetermined number of times of 2 or more, the dehydration operation is interrupted, and the modified rinsing process including the water supply process-stirring process-drainage process is operated. If it is more than the predetermined number of times, the operation is stopped and an abnormality is displayed. A washing machine configured to so that.

  As a result, when a motor start failure abnormality occurs during dehydration and the cause is a lint clogging in the drainage groove, the user can be warned of the lint clogging in the drainage ditch and the problem can be resolved.

  The washing machine of the present invention can inform the user of the abnormal start-up of the motor due to lint clogging in the drainage groove in the dehydration process, eliminate the cause and eliminate the problem. it can.

  The first invention includes a main body, a water receiving tub elastically supported by the main body, a washing / dehydrating tub enclosed in the water receiving tub for storing laundry, and an inner bottom portion of the washing / dehydrating tub. An agitating blade provided rotatably, a motor for driving the washing / dehydrating tub and the agitating wing, water supply means for supplying water into the washing / dehydrating tub, and drainage for draining water in the water receiving tub Means, a water level detecting means for detecting the water level in the water receiving tub, an unbalance detecting means for detecting an unbalanced state of the laundry in the washing and dewatering tub, and a rotational speed for detecting the rotational speed of the motor. With the detection means, storage means for storing the number of times of abnormality detected in a series of operations, the water level detection means, the unbalance detection means, the rotation speed detection means, etc. as inputs, the motor, water supply means, drainage means, etc. Control a series of washing A control means for automatically automatically rinsing and dehydrating steps sequentially, the control means in the dehydration operation when the imbalance detection means detects an unbalance abnormality that is an unbalanced state of the laundry, or When it is determined by the output of the rotational speed detection means that the motor start-up is abnormal, the number of times that the unbalance abnormality and the motor start-up abnormality are detected is stored in the storage means. When the addition of the number of times is less than the predetermined number of times of 2 or more, the operation of the dehydration is interrupted, and the operation of the modified rinsing step consisting of the water supply step-stirring step-drainage step is performed, so that the predetermined number of times is exceeded. In such a case, the operation is stopped and the abnormality is displayed, and the drainage abnormality is displayed when the last detected abnormality is the motor start failure abnormality. Accordingly, if lint clogging of the drainage grooves of the motor start-up failure abnormality by the cause, it is possible to notify the fact to the user, it is possible to eliminate the trouble removing the cause.

  According to a second aspect of the present invention, in the first aspect of the present invention, an upper frame that constitutes an upper portion of the main body and has an opening for taking in and out laundry in a washing and dewatering tub, and a lid that opens and closes the opening. A lid opening / closing detecting means for detecting that the lid has been opened and closed, and the control means returns from the abnormal display state by opening / closing the lid, and if the abnormal display is an abnormal motor start-up error, the control means In the case of an abnormal balance, by restarting the operation from the dehydration process, the motor startup failure abnormality due to lint clogging of the drainage ditch can be resumed by returning to the drainage process, so the drainage time can be taken longer, After returning, it is possible to make it difficult to detect motor start-up failure.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the thing of the same structure as a prior art example attaches | subjects the same code | symbol, and abbreviate | omits description. Further, the present invention is not limited by this embodiment.

(Embodiment 1)
1 is a side sectional view of a washing machine according to Embodiment 1 of the present invention. In FIG. 1, a main body 1 of a washing machine supports a water receiving tub 3 in a suspension and vibration-proof manner by a suspension 2. The washing / dehydrating shaft 4 is hollow and has a biaxial structure. The washing and dewatering tub 5 into which the laundry is put has a number of dewatering holes 6 on the side wall, a fluid balancer 7 on the upper part of the inner periphery, and a stirring blade 8 is rotatably disposed at the center bottom. Yes. The transmission mechanism 9 includes a reduction gear (not shown) during washing, a switching clutch (not shown) for washing and dewatering shafts, and a brake (not shown) for stopping the dewatering tank 5 during dehydration. is doing.

  The motor 10 is attached to the bottom of the water receiving tub 3, and the motor-side pulley 11 and the mechanical-side pulley 12 transmit the power of the motor 10 to the washing / dehydrating shaft 4 via the belt 13. In the above configuration, the switching operation between the dehydrating operation and the washing operation is performed by the drain valve 14. When the drain valve 14 is driven, the washing water in the water receiving tub 3 is drained and the switching clutch of the transmission mechanism unit 9 is switched. Is switched to the washing / dehydrating tub 5 side, and the dehydration operation in which the washing / dehydrating tub 5 rotates becomes possible. The upper frame 15 constituting the upper portion of the main body 1 is provided with a water level detecting means 16 for detecting the water level in the water receiving tub 3, and the laundry in the washing / dehydrating tub 5 is dehydrated. When the deviation occurs, the water receiving tank 3 generated by the deviation comes into contact with the unbalance detection means 17 for detecting the imbalance. The upper frame 15 is provided with a water supply valve 18 for controlling the supply of washing water in the washing and dewatering tub 5.

  Further, the upper frame 15 is formed with an opening 19 for taking in and out the laundry in the washing and dewatering tub 5, and a lid 20 is provided to cover the upper part thereof so as to be opened and closed. In order to detect the opening and closing of the lid 20, a permanent magnet 21 is attached to the tip of the lid 20, and the lid 20 is in a closed state by detecting the magnetic force of the permanent magnet in the upper frame 15. A lid open / close detection means 22 is provided which is constituted by a Hall element or the like for detecting the above. Further, a control device 23 is provided in the front portion of the upper frame 15.

  FIG. 2 is a control block diagram including the washing machine control device 23 according to Embodiment 1 of the present invention. The motor 10 rotationally drives the washing / dehydrating tub 5 and the stirring blade 8 and is provided with a phase advance capacitor 24 for rotationally driving the motor 10. The rotation speed detection means 25 of the motor 10 converts the voltage waveform of the terminal voltage of the phase advance capacitor 24, and detects the rotation speed based on the attenuation voltage when the motor 10 is turned on / off. A display means 26 composed of a light emitting diode or the like for displaying the driving course, remaining time, and the like is provided. The control means 27 is composed of a one-chip microcomputer or the like, and includes a timer 27a and a storage means (RAM) 27b as part of the program. The control means 8 receives signals from the motor rotation number detection means 25, the water level detection means 16, the unbalance detection means 17, and the lid open / close detection means 22, and stores a program written in advance in the ROM of the control means 27. According to the procedure, the load circuits such as the motor 10, the water supply valve 18, the drain valve 14 and the like are driven via the load driving means 28, and a series of washing, rinsing and dewatering washing steps are automatically operated. Furthermore, an AC power supply 29 and a power switch 30 are provided.

  FIG. 3 shows a specific example of the operation sequence of the washing machine in the first embodiment of the present invention. The washing process A is composed of a washing process A, a rinsing process B, and a dewatering process C. The rinsing process B includes a draining process Ba, an intermittent dewatering process Bb, a dewatering process Bc, a brake process Bd, a water supply process Be, and a stirring process Bf. Usually it is repeated twice.

FIG. 4 is a graph of motor rotation speed and elapsed time in the intermittent dehydration process in the rinsing process of the washing machine according to Embodiment 1 of the present invention. D is a normal case, E is a case where the user puts in too much detergent or the drainage capacity is low, and in both cases, a large amount of foam is generated between the water receiving tub 3 and the washing / dehydrating tub 5. This phenomenon occurs. From this graph, it is possible to determine a motor start failure. That is, when a large amount of bubbles are generated as in E, the rotational speed of the motor 10 does not exceed a predetermined rotational speed (for example, 400 r / min) even after a predetermined time (for example, 60 seconds) has elapsed.

  Next, the operation in the above configuration will be described with reference to the flowcharts of FIGS. FIG. 5 shows a flowchart in the intermittent dewatering process. When the control means 8 enters the intermittent dewatering process, the timer T1 that measures the total time of intermittent dewatering first in step 100 and the timer that measures the on / off time of the motor 10 are shown. T2 is cleared, the timer T1 and the timer T2 are counted in step 101, the drain valve 14 is driven in step 102, and the switching clutch of the transmission mechanism unit 9 is connected to the washing and dewatering tub 5. The next steps 103 to 110 are on / off control of the motor 10 for intermittent dehydration. In step 103, it is determined whether the motor 10 is in the ON mode. 10 is driven, and when the timer T2 has passed a predetermined on-time, the ON mode of the motor 10 is switched to the OFF mode in step 106, and the timer T2 is cleared in step 107. Returning to step 103, if the motor 10 is not in the ON mode, the motor 10 is stopped for a predetermined off time in steps 108 and 109. If the timer T2 has passed the predetermined OFF setting time, the ON mode of the motor 10 is switched to the OFF mode in step 110, and the timer T2 is cleared in step 107.

  Step 111 and subsequent steps are an unbalance detection and motor activation failure detection flow. In step 111, it is determined whether or not the unbalance detection means 17 is turned on. If turned on, the flow proceeds to an unbalance state determination flow in step 112. To determine whether the state is unbalanced. That is, if it is on for a short period of less than 0.3 seconds, it is determined that the state is unbalanced, and the unbalance detection count U is read from the storage means (RAM) in step 113 and 1 is added to the value of U. After that, it is stored again and the process proceeds to step 118. Returning to step 112, if the on-time is longer than 0.3 seconds, it is determined that the unbalanced state has not yet been reached, and the routine proceeds to the main processing at step 114 and thereafter. In step 114, the data of the rotational speed detection means 25 is input, and it is determined whether or not the rotational speed of the motor 10 is 400 r / min or more. Transition. In step 45, it is determined whether the timer T1 measuring the total time of intermittent dehydration is 120 seconds or more. If it is above, the intermittent dehydration is terminated and the process proceeds to the dehydration process. If it is less than 120 seconds, the process returns to step 101 and the operations up to step 115 are repeated. Returning to step 114, if the motor rotation speed is less than 400 r / min, the process proceeds to the activation failure determination flow in step 116. In step 116, it is determined whether the time that the timer T1 can sufficiently start the motor 10, for example, 60 seconds or more has elapsed. If it is less than 60 seconds, it is determined that the motor 10 has started normally, and the process proceeds to step 115. If 60 seconds or more have elapsed, it is determined that the motor 10 is in a start-up failure state, the number V of start-up failures is read from the storage means (RAM) in step 117, 1 is added to the value of V, and then again. Remember. In step 118 and subsequent steps, common processing is performed both when the imbalance is detected and when the motor activation failure is detected. In step 118, the value of the unbalance detection frequency U and the value of the motor activation failure frequency V are stored. It is read out from the means (RAM), and it is determined whether or not the added value (U + V) is equal to or greater than a set value N (N is a natural number of 2 or more). . If it is N times or more, the operation is stopped, and further, it is determined whether or not the start failure detection is detected in step 119. If the start failure is detected in step 120, the drainage abnormality is displayed, and the imbalance detection is performed. Then, in step 121, an unbalance abnormality display is performed. As a result, the drainage abnormality is displayed when the number of detections reaches a certain number or more due to an abnormal start failure.

  FIG. 6 shows a flowchart in the modified rinsing process, and the modified rinsing process includes a water supply process, an agitation process, and a drainage process. When the correction rinsing process starts, first, the water supply valve 18 is driven in step 122, and the water supply is continued until the set water level is reached from the data of the water level detection means 16 in step 123. When the set water level is reached, the water supply process is terminated, and the process proceeds from step 124 to the stirring process. In the agitation process, first, in step 124, the timer T3 for measuring the total time of the agitation process is cleared, and then in step 125, the motor 10 is driven to rotate in the clockwise direction, stopped, and rotated counterclockwise. Do. Next, in step 126, the timer T3 is counted, and in step 127, the reverse drive operation of the motor 10 is repeated until a certain time, for example, 2 minutes elapses. Move to the process.

  In the drainage process, first, the timer T4 for measuring the additional drainage time in step 128 is cleared, and in step 129, the drainage valve 14 is driven to drain the water in the water receiving tank 3. Next, in step 130, the drainage operation (driving valve driving) is continued until the reset water level is reached by the data of the water level detection means 4, and after detecting the reset water level or lower, the timer T4 is counted in step 131. In order to completely drain in step 132, the drain valve driving is continued for a certain time, for example, 1 minute. When this time elapses, the draining process is terminated, and the process returns to the beginning of the intermittent dewatering process before proceeding to the modified rinsing process. . By this corrected rinsing process, that is, the water supply process-stirring process-drainage process, the misalignment of the laundry is loosened by the stirring process in the case of an imbalance abnormality, and is included in the laundry when the motor 10 is not activated properly. The detergent is diluted with water, the bubbles in the water receiving tub 3 and the washing / dehydrating tub 5 are removed, and in the same intermittent dehydration process as the previous time, the unbalanced state or the motor start-up failure state is corrected.

(Embodiment 2)
FIG. 7 is a flowchart of the operation of the washing machine in the second embodiment of the present invention. Components having the same configurations as those of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  The second embodiment is an operation return process from displaying a drainage abnormality (= motor activation failure abnormality) or an unbalance abnormality display. First, in step 133, the lid opening / closing detection means 22 waits for the user to open the lid 20, and if it is detected that the lid 20 is opened, the next step 134 waits for the lid 20 to be closed. If it is detected that the lid 20 is closed, the user once opens the lid 20 and then closes it, and the process proceeds to an abnormality canceling process.

  In step 135 and subsequent steps, an abnormality canceling process is performed. In step 135, it is determined whether or not the abnormality currently displayed on the display means 26 is a drainage abnormality. Otherwise, the intermittent dehydration process is set at step 137. After each returning process is set, the abnormality display is canceled at step 138 and the normal remaining time is displayed. Thereafter, the process returns to each returning process and the washing operation is resumed.

  As a result, in the case of abnormal drainage, the operation can be resumed by returning to the drainage process, so that the drainage time can be increased, and it becomes difficult to detect motor start-up failure after return.

  As described above, the washing machine according to the present invention can notify the user of a malfunction of the motor starting failure due to lint clogging in the drainage groove, eliminate the cause and eliminate the problem. Therefore, it is useful as a washing machine having a motor activation failure detection and an unbalance detection function in the dehydration process.

Side sectional view of the washing machine according to Embodiment 1 of the present invention. Block diagram of the control device of the washing machine Operation sequence diagram of the washing machine Graph of motor rotation speed and time during intermittent dehydration process of the washing machine Flow chart in intermittent dehydration process of the washing machine Flowchart in the modified rinsing process of the washing machine Flowchart of the operation of the washing machine according to the second embodiment of the present invention.

Explanation of symbols

17 Unbalance detection means 25 Rotation speed detection means

Claims (2)

A main body, a water receiving tub elastically supported by the main body, a washing / dehydrating tub enclosed in the water receiving tub to store laundry, and an inner bottom portion of the washing / dehydrating tub rotatably provided An agitating blade, a motor for driving the washing / dehydrating tub and the agitating blade, a water supply means for supplying water into the washing / dehydrating tub, a draining means for draining water in the water receiving tub, and the water receiver A series of water level detecting means for detecting the water level in the tub, unbalance detecting means for detecting the unbalanced state of the laundry in the washing and dewatering tub, a rotation speed detecting means for detecting the rotation speed of the motor, A storage means for storing the number of times an abnormality has occurred during operation, the water level detection means, the unbalance detection means, the rotation speed detection means, etc. are input to control the motor, water supply means, drainage means, etc. , Rinse, take off Control means for automatically and automatically driving the process, the control means in the dehydration operation when the imbalance detection means detects an imbalance abnormality that is an unbalanced state of the laundry, or the rotation speed detection means The number of times that the unbalance abnormality and the motor activation failure abnormality are detected is stored in the storage means when the motor activation is determined to be defective due to the output of the motor. When the number of times is less than the predetermined number of times of 2 or more, the operation of the dehydration is interrupted, and the operation of the modified rinsing step including the water supply step-stirring step-drainage step is performed. A washing machine configured to display an abnormality by stopping operation and to display an abnormality in drainage when the abnormality detected last is an abnormality in the motor activation failure. An upper frame that forms an upper part of the main body and has an opening for putting laundry in and out of the washing and dehydrating tub, a lid that opens and closes the opening, and a lid opening / closing detection that detects that the lid is opened and closed The control means returns from the abnormal display state by opening and closing the lid, and restarts the operation from the drainage process when the abnormal display is an abnormal motor start-up abnormality and from the dehydration operation when the imbalance abnormality is present. The washing machine according to claim 1, which is configured as described above.