JP2016158745A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washing machine having high dewatering performance.SOLUTION: In a dewatering step, control means 82 determines a cloth amount detected by cloth amount detection means 85 in a plurality of stages, in a predetermined dewatering rotational frequency region, and for each of the determined plurality of stages, a threshold value with respect to a vibration value of a water tub unit 49 in the predetermined plurality of dewatering rotational frequency regions is set, and also, in the predetermined dewatering rotational frequency regions, in the case where the vibration value of the water tub unit detected by vibration detection means is smaller than the threshold value, the rotation is increased to the next rotational frequency region, and in the case where it is larger than the threshold value, the rotational frequency region continues to the end of the dewatering step.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a washing machine.

  Conventionally, in this type of washing machine, a control method has been proposed in which the presence or absence of an imbalance abnormality is detected by detecting the vibration of the vibration system during dehydration and the subsequent processes are controlled (for example, Patent Documents). 1).

  FIG. 5 is a flowchart illustrating a determination in the case of an imbalance abnormality in the conventional drum-type washing machine described in Patent Document 1, and a corresponding flow based on the determination.

  In FIG. 5, when the dehydration process starts in step 100, a drain operation is performed in step 101. After the draining process, in step 102, the washing tub is forwardly rotated and reversed (unraveling step) at a predetermined rotational speed (for example, about 50 r / min). Unwind laundry such as uneven clothes by the unpacking process.

  Next, in step 103, the speed is gradually increased to a predetermined rotational speed (about 90 r / min) that allows the laundry to stick to the inner surface of the washing tub. Thereafter, in step 104, control is performed to maintain a predetermined rotation speed (for example, about 95 r / min) lower than the primary resonance rotation speed for a predetermined time.

  In step 104, the rotation unevenness at the predetermined rotational speed, that is, the presence or absence of imbalance, is detected. If there is an unbalance exceeding a predetermined value, it is determined that the rotation unevenness is large and the balance state is bad. It is determined whether or not = 6. If N = 6, after the washing tub is temporarily stopped in step 106, 1 is added to the current N in step 107, and the process proceeds to step 102. The operation from step 102 to 107 is repeated a predetermined number of times. When N = 6 in step 105, it is considered that the unevenness of the laundry has not been eliminated in the loosening process in step 103, and the process proceeds to step 108. If N is less than 10 in step 108, the process proceeds to step 110, the process of supplying water into the washing tub and correcting the bias of the laundry is performed, and the process proceeds to step 101. In Step 108, 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.

  If it is determined in step 104 that there is no unbalance above the predetermined level, the process proceeds to step 111, and in step 111, an imbalance abnormality is determined based on the output signal from the vibration detection means. If it is determined in step 111 that there is an unbalance abnormality, the process proceeds from step 105 to step 109, the unbalance abnormality is displayed, and the operation is stopped.

  If it is determined in step 111 that there is no unbalance abnormality, the process proceeds to step 113, where an unbalance abnormality at a predetermined rotational speed (for example, about 400 r / min) is determined based on an output signal from the vibration detecting means, and unbalance is performed. In the case of a balance abnormality, the process proceeds from step 105 to step 109, an unbalance abnormality is displayed, and the operation is stopped.

If it is determined in step 113 that there is no unbalanced predetermined abnormality, in step 114, an unbalance abnormality at a predetermined rotational speed (for example, about 700 r / min) is determined based on an output signal from the vibration detecting means. . If it is determined in step 114 that there is no unbalance abnormality and it is normal, the routine proceeds to step 115, where the washing tub is rotated up to the maximum rotational speed. On the other hand, when the vibration output value becomes larger than the threshold value in step 114, that is, when it is determined that an unbalance abnormality has occurred, the routine proceeds to step 116, where the number of rotations in the state where the unbalance abnormality has occurred is determined. The control configuration is such that the rotation is maintained for a predetermined time, the operation is stopped for a predetermined time, the operation is stopped in Step 117, and the next process is shifted to Step 118.

Japanese Patent Application Laid-Open No. 2012-170685

  However, the conventional washing machine updates the threshold only by the number of times to correct the imbalance regardless of the type and number of clothes.

  The present invention solves the above-described conventional problems, detects a load state from the amount of cloth and rotation unevenness, and changes the threshold according to the load state. By carrying out like this, it aims at providing the drum type washing machine which can perform high speed dehydration in a short time, and can ensure high dehydration performance and shorten dehydration time.

  The present invention solves the above-described conventional problems, and includes a washing tub, a water tub that rotatably includes the washing tub, a motor that rotationally drives the washing tub, the washing tub, the water tub, and a motor. A washing machine housing that elastically supports a vibrating water tank unit, a rotation speed detecting means for detecting the rotation speed of the motor and detecting the rotation speed of the washing tank, and a load applied to the motor. Detecting and detecting the weight of clothes put in the washing tub, detecting the load applied to the motor, detecting the vibration of the water tank unit, controlling the motor, etc. Control means for controlling each process such as washing, rinsing, dehydration, etc., wherein the control means has a plurality of stages of the amount of cloth detected by the cloth quantity detection means in a predetermined dehydration speed range in the dewatering process. And determine For each stage, a threshold value is set for the vibration value of the water tank unit in a predetermined multiple dehydration rotational speed range, and the vibration value of the water tank unit detected by the vibration detecting means in the predetermined multiple dehydration rotational speed range is the threshold value. If it is smaller, the rotation speed is increased to the next rotation speed range, and if the vibration value of the water tank unit detected by the vibration detection means is larger than the threshold value, the rotation speed range when the vibration exceeding the threshold value is detected is set. The washing machine is configured to continue until the end of the process of detecting the vibration.

  Thereby, high dehydration performance can be ensured and dehydration time can be shortened.

  The washing machine of the present invention can realize a washing machine having highly efficient dewatering performance and short-time dewatering performance.

1 is a longitudinal sectional view of a washing machine according to a first embodiment of the present invention. Block diagram of the washing machine Flow chart of dehydration process of the washing machine Flow chart of preliminary dehydration process of the washing machine Flow chart of conventional washing machine dewatering process

  According to a first aspect of the present invention, there is provided a washing tub, a water tub that rotatably contains the washing tub, a motor that rotationally drives the washing tub, and a vibrating water tank unit that includes the washing tub, the water tub, and the motor. A washing machine casing elastically supported for movement, a rotation number detecting means for detecting the rotation number of the motor and detecting the rotation number of the washing tub, and a load applied to the motor are detected and placed in the washing tub. A cloth amount detecting means for detecting the weight of the garment, a load applied to the motor, a vibration detecting means for detecting the vibration of the aquarium unit, and the motor etc. to control washing, rinsing, dehydration, etc. Control means for controlling each stroke, and the control means determines the cloth amount detected by the cloth amount detection means in a plurality of stages in a predetermined dewatering rotation speed range in the dewatering process, and determines the determined plurality of stages. Separately, predetermined multiple dehydration times A threshold value is set for the vibration value of the aquarium unit in several areas, and if the vibration value of the aquarium unit detected by the vibration detecting means is smaller than the threshold value in the predetermined multiple dehydration rotation speed area, the next rotation When the vibration value of the aquarium unit detected by the vibration detection means is greater than the threshold value, the rotation speed range when the vibration exceeding the threshold value is detected is the same as the process of detecting the vibration. By adopting a configuration that continues to the end, it is possible to ensure high dewatering performance and shorten the dewatering time.

  According to a second invention, in the first invention, a plurality of types of clothes put in the washing tub are determined based on the magnitude of the rotation unevenness in the low speed range of the water tank unit detected by the vibration detecting means and the frequency of the rotation unevenness. By determining the level and setting a threshold value for the vibration value of the water tank unit in a predetermined multiple dehydration speed range for each determined multiple stage, high dewatering performance can be ensured and dewatering time can be shortened.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 3. Note that the present invention is not limited to the present embodiment.

(Embodiment 1)
FIG. 1 is a longitudinal sectional view of the washing machine of the present invention, and FIG. 2 is a side sectional view of the washing machine.

  In FIG. 1, a water tank 42 is swingably disposed inside a washing machine casing 41, and a washing tank 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 washing tub 43, and a motor 45 attached to the rotation shaft 44 near the back side of the water tub 42 is connected via a belt 46. The washing tub 43 is rotationally driven by the motor 45 in the forward and reverse directions. On the inner wall surface of the washing tub 43, several protruding plates 47 for stirring the laundry are provided. In addition, a large number of water passage holes 48 are provided on the entire outer surface of the washing tub 43.

  The water tank 42, the washing tank 43, the motor 45, and the like constitute a vibration-type water tank unit 49. The water tank unit 49 includes a plurality of spring bodies 50 from the upper part of the washing machine casing 41, and the washing machine casing 41. Anti-vibration is supported by a plurality of anti-vibration dampers 51 from below.

  An opening is formed on the front side of the washing machine casing 41, the opening is covered with a lid 52 so that it can be opened and closed, and the lid 52 is opened to allow laundry to be taken in and out of the washing tub 43 through the clothing entrance 53. I can do it.

  The washing machine according to the present embodiment 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 mode setting and a control program to perform at least a washing process, a rinsing process, and a dehydrating process. doing.

In the washing machine housing 41, a first electromagnetic valve 57 (first water supply means) and a second electromagnetic valve 58 (second water supply means) are provided. A first water supply hose 59 is connected to the first electromagnetic valve 57, and a second water supply hose 60 is connected to the second electromagnetic valve 58 to supply water to the detergent container 61. The detergent container 61 accommodates a drawer and a soft finish, and a drawer (not shown) that can be pulled out to the outside.

  The water supply system 54 includes a first electromagnetic valve 57, a second electromagnetic valve 58 and the like, and the first electromagnetic valve 57 (first water supply means) or the second electromagnetic valve 58 (second water supply means). By opening / closing control, water can be supplied into the water tank 42 from the first water supply hose 59 or the second water supply hose 60 through the detergent container 61 and the water supply path 62 in a timely manner.

  One end of a drain pipe 64 is connected to the bottom of the water tank 42, and the other end of the drain pipe 64 is connected to a filter case. The filter case houses a lint filter 65 that collects lint contained in the washing liquid, and the lint filter 65 is configured to be removable from the lower front portion of the washing machine casing 41 to the outside by a filter knob 84. doing. The lint filter 65 is connected to a drainage pump 63 connected to a drainage hose 66 disposed from the inside of the machine to the outside of the machine.

  The drainage system 55 includes a drainage pump 63 and the like. When the drainage pump 63 is driven, the wastewater in the water tank 42 is drained by the lint filter 65 when the washing process is completed or the rinse process is completed. After being removed, the drainage hose 66 can be drained out of the machine. The drain pipe 64 is provided with a sensor 67 that detects the state of the washing water in the water tank 42. The sensor 67 can detect the dirty state of the washing water during the washing process and the rinsing process.

  The water circulation system 56 circulates the water in the water tub 42 into the washing tub 43 as necessary during the pre-washing process, the washing process, the rinsing process, etc., and prevents the detergent from prematurely dissolving and biasing and activating the detergent. Make it. Thereby, the function improvement of being easy to wash can be aimed at.

  The water circulation system 56 drives the circulation pump 68 to remove the lint and the like in the waste water from the washing water in the water tank 42 through the drain pipe 64 and the lint filter 65. A flow path (inside the front portion of the water tub 42) of the washing water from which the lint etc. has been removed through the inflow side path 69 to the circulation pump 68, the circulation pump 68 and the discharge side path (not shown) of the circulation pump 68 (Not shown) and sprayed radially into the washing tub 43 as circulating water indicated by a solid line arrow from the spout 70 facing the clothing entrance 53 of the washing tub 43.

  The recess 71 formed at the bottom of the water tub 42 is provided with a hot water heater (heating means) 72 made of a sheathed heater for heating the wash water in the horizontal direction, and the wash water in the water tub 42 heated by the hot water heater 72 is provided. As described above, the washing water is sprinkled on the laundry by discharging it into the washing tub 43, and this 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, temperature detection means 73 such as a thermistor for detecting the water temperature is provided.

  The air trap 74 is connected to a water level detection means 76 that is provided inside the upper part of the washing machine casing 41 via an air pipe 75 and is constituted by a pressure sensor or the like. The water level of a plurality of stages is detected by the pressure of the washing water supplied to the water.

  The upper rear surface of the detergent container 61 provided in the upper inner side of the washing machine casing 41 and the upper part of the water tank 42 are connected by a connecting hose 77, and the connecting hose 77 is a water tank that is pressurized by a stroke operation. It serves to remove air in 42.

  Selection of the mode such as the driving course and various functions is performed by the user inputting to the input setting means 80 from the operation display means 79 provided at the upper front of the washing machine casing 41. The input signal of the input setting means 80 is input to a control device 81 having a control means (not shown) disposed inside the washing machine casing 41, and the control device 81 operates based on the input information. The information is displayed on display means (not shown) on the display means 79 to inform the user, and the washing process is controlled.

  FIG. 2 is a block circuit diagram of the 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. The control device 81 includes a water level detection means 76, a temperature detection means 73, a cloth amount detection means 85, a vibration detection means 78, and a rotation speed detection means 90 for detecting the rotation speed of the motor 45 and the rotation speed of the connected washing tub 43. , Input setting means 80 The setting content is input. The control means 82 displays the setting contents on the display means 96 based on the inputted contents, and via the load driving means 86 constituted by a bidirectional thyristor, a relay, etc., the motor 45, the hot water heater 72, the first The operation of the electromagnetic valve 57, the second electromagnetic valve 58, the drainage pump 63, the circulation pump 68, and the like is controlled, and the steps of washing, rinsing, and dewatering are controlled. 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 flowchart of the dehydration process of the drum type washing machine in the embodiment of the present invention.

  In FIG. 3, in the washing process prior to the dehydration process, the cloth amount detection means 85 detects the amount of laundry put into the washing tub 43. Based on the detected cloth amount, the case where the cloth amount is small is classified into rank 1, the case where the cloth amount is large is classified into rank 2, the threshold value of rank 1 is set to 1, and the threshold value of rank 2 is set to 2.

  When the dehydration process is started (step S1), the washing tub 43 is rotated left and right, and then a preliminary dehydration process for raising the washing tub 43 to 350 r / min stepwise is performed (step S2). By rotating the washing tub 43 left and right, moisture contained in the laundry can be gradually removed, and the tangling of the laundry can be loosened.

  After one preliminary dehydration step (step S2), the brake is temporarily applied (step S3), and the process proceeds to step S4 to execute one step of cloth unraveling. After further loosening the tangling of the laundry in the cloth unwinding step 1 of step S4, the preliminary dehydration 2 step of starting the rotation of the washing tub 43 stepwise up to 600 r / min is performed (step S5). After the preliminary dehydration two steps (step S5), the brake is temporarily applied (step S6), and the process proceeds to step S7 to execute the cloth unpacking two steps.

  In step 2 of cloth unwinding in step S7, after further loosening the tangled laundry, it is gradually raised to a predetermined maximum rotational speed (in this embodiment, about 1430 r / min) and rotated at the maximum rotational speed. Continue (step S8), perform dehydration for a predetermined time (step S9), and end the dehydration process.

  FIG. 4 is a flowchart for explaining step S2 in more detail.

  Based on FIG. 4, the preliminary dehydration process (step S2) will be described in more detail.

  In step S21, one pre-dehydration process is started, the motor 46 is driven, the washing tub 43 is rotated left and right, and then the washing tub 43 is rotated.

  In step S22, it is determined whether or not the rotation of the washing tub 43 has increased to 350 r / min. If it has not reached 350 r / min, the rotation speed of the washing tub 43 is increased stepwise in step S23. If the rotation of the washing tub 43 has reached 350 r / min, the process proceeds to step S24.

  In step S24, the vibration of the water tank unit 49 is detected by the vibration detection sensor 78 and compared with a threshold corresponding to the amount of cloth.

  When the amount of cloth is small, it is classified into rank 1 and the threshold is set to 1. If the detected vibration value of the water tank unit 49 does not exceed the threshold value 1, it is determined in step S25 whether or not the operation time of the preliminary dehydration process has elapsed, and if the operation time has elapsed, the process proceeds to step S3. If the operation time has not elapsed, the process proceeds to step S22.

  If the vibration value of the water tank unit 49 detected by the vibration detection sensor 78 exceeds the threshold value 1 in step S24, it is determined in step S26 whether or not the transition to step S2 has been performed a predetermined number of times. In the present embodiment, the predetermined number of times is set to 30. If the number of transitions to step S2 has not reached the predetermined number, the process proceeds to step S21, and step S2 is executed from the beginning.

  In step S26, when the transition to step S2 has reached the predetermined number of times, the routine proceeds to step S27, where it is determined whether or not the operation time of the first preliminary dehydration process has elapsed, and the operation time of the first preliminary dehydration process is determined. If it passes, it will transfer to step S3.

  As shown in step S24, step S26, and step S27, when the vibration value of the water tank unit 49 exceeds the threshold value even if the transition to step S2 is performed a predetermined number of times (for example, 30 times) in the preliminary dehydration step 1. Is controlled as follows. That is, normally, the rotational speed of the washing tub 43 is increased stepwise to 350 r / min. For example, when the vibration value of the water tub unit 49 exceeds the threshold 1 at 300 r / min, 300 r / min. The laundry tub 43 is rotated until the unloading end time of the pre-dehydration 1 stroke elapses without further increasing the rotation speed, and when the operation end time of the pre-dehydration 1 stroke elapses, the process proceeds to step S3.

  When the amount of cloth is large in the first preliminary dehydration process, the cloth is classified into rank 2 and the threshold is set to 2. The other operations are as described above except that the threshold is different from the case where the amount of cloth is small.

  The preliminary dehydration step 2 in step S5 is the same as the operation in step S2 described above.

  If the vibration value of the aquarium unit 49 exceeds the threshold value even if the transition to step S2 is performed a predetermined number of times (for example, 30 times) during the operation of the preliminary dehydration process of step S5, the following control is performed. The That is, in step S5, the rotational speed of the washing tub 43 is increased to 600 r / min, but step S5 is being executed even though the transition to step S2 is performed a plurality of times (for example, 30 times). For example, when the vibration value of the water tank unit 49 exceeds the threshold value at 500 r / min, the rotation at 500 r / min is continued until the end of the preliminary dehydration step 2 in step S5.

In this Embodiment, when the vibration value of the water tank unit 49 exceeds a threshold value, it is comprised so that transfer to step S2 may be repeated to predetermined times. For example, when setting so that the transition to step S2 is repeated up to 30 times, if the vibration value of the aquarium unit 49 exceeds the threshold even after shifting to step S2 up to 20 times, the detected vibration value of the aquarium unit 49 is detected. The threshold value may be corrected so that it is difficult to exceed the threshold value.

  In the present embodiment, although divided into two stages according to the amount of cloth, it may be divided into three or more stages, and a threshold may be set for each classification.

  As described above, in the present embodiment, a threshold value is set for the vibration value of the aquarium unit in a predetermined plurality of dewatering rotation speed ranges for the detected amount of cloth in a plurality of stages, and the subsequent dewatering process is controlled. Yes. With this configuration, vibration control suitable for the amount of cloth can be performed, and dehydration can be performed in a shorter time and at a higher rotational speed, and high dewatering performance can be ensured.

  In addition, based on the magnitude of rotation unevenness and the frequency of rotation unevenness in the low speed range (for example, about 95 r / min) obtained by the rotation speed detection means, the threshold value for the vibration value of the water tank unit in a predetermined multiple dehydration rotation speed range is set. It may be set and the dehydration process may be controlled in the same manner as described above. With this configuration, vibration control suitable for the amount of cloth can be performed, and dehydration can be performed in a shorter time and at a higher rotational speed, and high dewatering performance can be ensured.

  Based on the magnitude of rotation unevenness and the frequency of rotation unevenness in a low speed range (for example, about 95 r / min), it is possible to determine the amount of cloth, the type of laundry being put in, and the like based on the determination result. The dehydration performance can be improved by dehydrating at a high rotation speed.

  If it is determined that the vibration value of the aquarium unit 49 does not exceed the threshold value as a result of the determination of the amount of cloth and the type of laundry that has been thrown in, the preliminary dehydration process of step S2 and the process of step S5 The preliminary dehydration process 2 may be omitted, and the process may proceed to step S8 to rotate the washing tub 43 at the maximum rotation speed. In this case, the maximum rotational speed may be set to a rotational speed lower than 1430 r / min, for example, 1300 r / min.

  Although the present embodiment has been described based on the drum type washing machine shown in the drawing, it may be adopted in a vertical washing machine.

  As described above, the washing machine according to the present invention can classify the types and the number of clothes into a plurality of stages and set an appropriate vibration threshold value. And is useful as a vertical washing machine.

41 Washing machine housing 42 Water tank 43 Washing tank 45 Motor 49 Water tank unit 78 Vibration detection means 82 Control means 90 Rotation speed detection means

Claims (2)

A washing tub, a water tub that rotatably includes the washing tub, a motor that rotationally drives the washing tub, and a vibration-type water tub unit that includes the washing tub, the water tub, and the motor are elastically supported in a swingable manner. Detecting the number of rotations of the washing machine casing, the number of rotations of the motor and the number of rotations of the washing tub, and detecting the load applied to the motor and detecting the weight of clothes put in the washing tub Control for detecting the load applied to the motor, the vibration detection means for detecting the vibration of the water tank unit, and the motor, etc., for controlling each step of washing, rinsing, dehydration, etc. And the control means determines the amount of cloth detected by the cloth amount detection means in a plurality of stages in a predetermined dewatering speed range in a dewatering process, and determines a plurality of predetermined dewaterings according to the determined plurality of stages. In the speed range A threshold value for the vibration value of the water tank unit is set, and if the vibration value of the water tank unit detected by the vibration detecting means is smaller than the threshold value in the predetermined multiple dehydration rotation speed range, the next rotation speed range is reached. If the vibration value of the aquarium unit detected by the vibration detection means is greater than the threshold value, the rotation speed range when the vibration exceeding the threshold value is detected is continued until the end of the process of detecting the vibration. Washing machine. The type of clothing put in the washing tub is determined in multiple stages from the size of rotation unevenness in the low speed range of the water tank unit detected by the vibration detection means and the frequency of the rotation unevenness, and predetermined for each of the determined multiple stages. The washing machine according to claim 1, wherein a threshold value is set for a vibration value of the water tank unit in a plurality of dehydration rotation speed regions.

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