JP2013103052A - Washer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washer which determines abnormality of conductivity detection means by water level detection means.SOLUTION: A washer comprises: conductivity detection means 78 for detecting a conductivity of washing water; water level detection means 90 for detecting a water level of an inner tub 44; storage means 97 for storing data necessary for operation scheduling and control etc.; notification means 98 for notifying abnormal state of washing operation etc.; and controlling means 87 for sequentially controlling a series of steps, the controlling means 87 determines the conductivity detection means 78 as being in an abnormal state if the conductivity detection means 78 detects a certain water level while the water level detection means 90 does not detect the certain water level, which makes it possible to determine whether the conductivity detection means is in a state capable of performing accurate detection, thereby allowing the washer to determine the abnormality with high reliability and performing the control of the subsequent steps appropriately.

Description

  The present invention relates to a fully automatic washing machine that detects the conductivity of a washing liquid and controls the operation of a stroke operation.

  Conventionally, this type of fully automatic washing machine has been proposed to control the stroke by detecting the change rate of the conductivity of the washing liquid detected by the conductivity detecting means (see, for example, Patent Document 1).

  FIG. 6 is a longitudinal sectional view of the washing machine described in Patent Document 1, and FIG. 7 is an operation flowchart of the washing machine.

  In FIG. 6, a circulation water channel 7 provided in communication with the outer bottom portion of the water receiving tub 1 in which the washing and dewatering tub 2 is rotatably included circulates water (washing water or rinsing water) in the water receiving tub 1. Thus, the circulation pump 8 is provided in the middle of the circulation path 7, and the water supply nozzle 6, the circulation path 7, and the circulation pump 8 constitute the water circulation means 9. On the upstream side of the circulation path 7, conductivity detecting means 10 for detecting the conductivity of the washing water is provided.

  In FIG. 7, the operation is started at step 30, and a washing and draining (dehydration) process is executed at step 31. Thereafter, in step 32, the water supply valve 11 is opened to supply a predetermined amount of rinse water. Next, in step 33, the motor 4 is driven to start the rotation of the washing and dewatering tub 2. Subsequently, in step 34, the circulation pump 8 is operated to circulate the rinse water.

  In step 35, the conductivity of the rinsing water is detected by the conductivity detecting means 10, and it is determined in step 36 whether the rate of change of this value is stable. If stable, the process proceeds to step 37, and if the conductivity value is smaller than the predetermined value, the process proceeds to step 41, and if larger than the predetermined value, in step 38, the number of repetitions of the rinsing process already performed is confirmed. If not reached, the rinsing process is repeated from step 32 through the drainage and intermediate dehydration processes of step 39, but if the predetermined number of times has been reached, the process proceeds to step 40 to supply water to the washing / dehydration tank 2 to a predetermined water level. Rinse (recycle). Finally, in step 41, drainage and final dehydration are performed to complete the entire process.

JP 07-308485 A

  However, in such a conventional configuration, it is premised that the conductivity detecting means operates correctly and the accurate conductivity is detected, and dirt or the like adheres to the electrode for detecting the conductivity, There is a problem in correctly determining the inaccuracy in the case where the conductivity is not correctly detected due to failure of the circuit or peripheral circuit.

  The present invention solves the above-described conventional problems, and by determining the abnormal state of the conductivity detection means for detecting conductivity, the reliability of the conductivity detection is improved, and the time for the rinsing process is reduced. The purpose is to save energy.

  In order to achieve the above object, a washing machine of the present invention includes an outer tub elastically suspended in a housing, an inner tub rotatably supported in the outer tub, and an inner bottom portion of the inner tub. A pulsator provided, a driving means for rotationally driving the inner tub or the pulsator, and a conductivity lower than the upper surface of the outer periphery of the pulsator at a lower portion of the outer peripheral side wall of the outer tub, and detecting conductivity of washing water The control means comprising: a detection means; a water level detection means for detecting a water level in the inner tank; and a control means for sequentially controlling a series of steps of washing, rinsing, dehydration, and drying by sequentially controlling the driving means and the like. The means determines that the conductivity detecting means is in an abnormal state when the water level detecting means does not detect a predetermined water level but the conductivity detecting means detects the water level. is there.

  As a result, it can be determined whether or not the conductivity detecting means is in a state where it can be detected correctly, so that a highly reliable determination can be made, and the subsequent processes can be appropriately controlled.

  The fully automatic washing machine of the present invention can appropriately control the washing and rinsing process by improving the reliability of conductivity detection, and can achieve time reduction and energy saving.

1 is a longitudinal sectional view of a fully automatic washing machine according to Embodiment 1 of the present invention. Block diagram of the fully automatic washing machine Flow chart of washing of the fully automatic washing machine Flow chart of conductivity determination 1 of the fully automatic washing machine Flow chart of conductivity determination 2 of the fully automatic washing machine Conventional washing machine longitudinal section Operation flowchart of the washing machine

  According to a first aspect of the present invention, there is provided an outer tank that is elastically suspended in a housing, an inner tank that is rotatably supported in the outer tank, a pulsator provided at an inner bottom of the inner tank, and the inner tank Or a driving means for rotationally driving the pulsator, a conductivity detecting means provided at a position lower than the upper surface of the outer periphery of the pulsator at the lower portion of the outer peripheral side wall of the outer tub, and a conductivity detecting means for detecting the conductivity of the washing water, A water level detection means for detecting a water level; and a control means for sequentially controlling a series of steps of washing, rinsing, dehydration, and drying by sequentially controlling the drive means and the like. If the conductivity detection means detects the water level even though the water level is not detected, the conductivity detection means can be detected correctly by determining that the conductivity detection means is in an abnormal state. To determine if it is in a state Since it is, it is a reliable determination can be appropriately controlling the subsequent stroke, whereby it is possible to achieve a time saving and energy saving of the stroke.

  According to a second aspect of the present invention, in particular, the control means according to the first aspect of the present invention is configured such that the water level detection means detects the predetermined water level, but the conductivity detection means does not detect the water level. By determining that the rate detection means is in an abnormal state, it can be determined whether or not the conductivity detection means is in a state where it can be detected correctly. Thus, the process time can be shortened and energy saving can be achieved.

  In the third invention, in particular, when the control means of the first or second invention determines that the conductivity detection means cannot perform normal detection, the control means does not use the conductivity detection means. By controlling the stroke, the stroke is continued without stopping, so that the user is not dissatisfied with being unable to wash.

  In the fourth aspect of the invention, in particular, when the control means of the first or second aspect of the invention determines that the conductivity detection means cannot perform normal detection, the number of times is stored, and the conductivity detection is performed. By notifying when it is determined that the means cannot be normally detected more than a predetermined number of times, it is possible to notify the user that the conductivity detecting means cannot be normally determined, and the serviceability is improved. can do.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a longitudinal sectional view of a fully automatic washing machine according to Embodiment 1 of the present invention, and FIG. 2 is a block circuit diagram of the fully automatic washing machine.

  In FIG. 1, a housing 41 is provided with an outer tub 43 that is elastically suspended by a plurality of suspensions 42 and absorbs vibration during dehydration by the suspensions 42. Inside the outer tub 43, an inner tub 44 for storing clothes and objects to be dried is disposed rotatably around a washing / dehydrating shaft 45 having a hollow and double structure. Further, a pulsator 46 that stirs the object to be dried is rotatably arranged.

  In addition, the inner peripheral wall of the inner tank 44 is provided with a number of drain holes and air holes 44a for dehydration, and a fluid balancer 47 is provided above. A motor (driving means) 48 is attached to the outer bottom of the outer tub 43 and is connected to the inner tub 44 or the pulsator via the clutch 49 and the washing / dehydrating shaft 45 for switching the transmission of rotational force to the washing / dehydrating shaft 45 during washing or dehydrating. 46 is connected. The pulsator 46 has a substantially pan-like shape having an inclined surface 50 on the outer peripheral portion, and forms a stirring protrusion 51. The clothes are stirred during the washing process, and the object to be dried is rotated by the pulsator 46 during the drying process. It is easy to soar upward along the inclined surface by centrifugal force. In other words, the clothes are configured to move left and right (in the rotational direction) and also move up and down by stirring.

  The heat exchange duct 52 having a drying function dehumidifies the circulating hot air (circulating air), and one end of the heat exchange duct 52 is connected to a drainage passage port 54 provided at the lower portion of the outer tub 43 through the connection duct 53. The other end is connected to the inlet side of the hot air blowing means 61 constituting the hot air circulation path 57.

  On the other hand, the outer tub 43 is provided with an outer tub cover 65 that hermetically covers the upper surface of the outer tub 43, and the outer tub cover 65 is opened with a hot air jet hole 60 from the upper and lower bellows-like hose 58 that can be expanded and contracted. doing. Further, an inner lid 66 is provided on the outer tank cover 65 so as to be freely opened and closed so that clothes can be taken in and out.

  An upper frame body 68 having a clothing insertion port 67 is attached to the upper portion of the housing 41 at a substantially central portion, and an outer lid 69 is provided so as to be able to open and close so as to cover the clothing insertion port 67.

  A support member 71 equipped with the hot air blowing means 61 for the drying function, the water supply valve 70, and the like is provided inside the rear part of the upper frame 68.

  The water supply valve 70 has a multi-valve configuration in which two or more water channels can be opened and closed. The water supply valve 70 is supplied from tap water or the like. The other water channel is connected to the inner tub 44 through a water supply member (not shown) provided on the support member 71 so as to supply water as washing water at a large flow rate with a water supply hose 73. Is done.

  The support member 71 inside the upper frame 68 can store an amount of liquid detergent that can be used for a plurality of washings, and automatically puts the liquid detergent into the outer tub 43. 64 is configured. A flexible detergent pouring hose 59 is connected between the liquid detergent automatic charging device 64 and the outer tank cover 65, and pumped from the liquid detergent automatic charging device 64 by the air pump 40 (described later in FIG. 2). Liquid detergent is dripped between the outer tank 43 and the inner tank 44 through the detergent water supply hose 59. In addition, since the detergent water injection hose 59 is flexible, even when the entire outer tub 43 that is a vibration system is swung during dehydration, there is almost no influence on the vibration system.

  A drain valve 74 for draining the water in the outer tub 43 is provided at the bottom of the outer tub 43 and connected to the heat exchange duct 52 and the connection duct 53 via the drain duct 75, and the connection duct 53 and the heat exchange duct are connected. The drainage from 52 is guided to the drainage duct 75 and the drainage valve 74 and drained from the drainage hose 76 to the outside of the machine. Further, as described above, the drain duct 75 is formed with a cleaning pipe 77 to which one end of the cleaning hose 72 piped to the water supply valve 70 is connected.

  The drainage duct 75 emits and receives infrared rays upstream of the drainage valve 74, detects the turbidity of the washing water based on its transmission degree and rate of change, and detects the degree of dirt on the clothes. Is attached.

  A conductivity detecting means 78 having a pair of electrodes 94 for detecting the conductivity of washing water and detecting the presence of water and the type of detergent is provided at the lower portion of the outer peripheral side wall of the outer tub 43. Since the lower part of the pulsator 46 is below the upper surface of the outer periphery of the pulsator 46, it is difficult to be affected by the water flow caused by the rotation of the pulsator 46, and the conductivity can be detected stably.

  Further, an air trap 95 is formed on the outer peripheral side wall of the outer tub 43, connected to a water level detecting means 90 configured by a pressure sensor or the like with an air pipe 96, and by the water pressure of the washing water supplied into the outer tub 43. Multiple levels of water level can be detected.

  The water level is set from rank 1 to rank 9, and only rank 1, rank 3, rank 4, and rank 9 are shown in FIG. 1, but rank 4 to rank 9 are washed and stirred according to the amount of cloth. The water level where rinsing and agitation are performed, and rank 9 is the high water level.

  The cooling blower 79 is attached to the side surface of the housing 41 and is configured to blow air so as to cool the outer tub 43, the heat exchange duct 52, and the like inside the housing 41.

  The control device 80 is integrally formed, and is disposed substantially vertically on the back surface (back cover) 81 of the housing 41, and a cooling blower 79 is provided below the control device 80. The control device 80 is covered and protected by a cover 82.

  An operation display unit 85 including an input setting unit 83 and a display unit 84 which will be described later with reference to FIG.

  In the block circuit diagram of FIG. 2, the control device 80 includes a motor (drive means) 48, a clutch 49, a drying fan 55 and a heater 56 that constitute the hot air blowing means 61, and a drain valve via a load drive means 86. 74, control means 87 for controlling the operation of the cooling fan (cooling means) 79, the water supply valve 70, etc., and controlling the steps of washing, rinsing, dehydration and drying, and the sterilization / deodorization process.

  The control means 87 is constituted by a microcomputer or the like, and starts operating when power is supplied from the commercial power supply 88 when the power switch 89 is turned on. The cloth amount detection means 93, the water level detection means 90, and the temperature detection means 62 and 63 Based on the contents set by the user's input in the input setting means 83, the setting contents are displayed on the display means 84, and through the load driving means 86 composed of a bidirectional thyristor, a relay and the like. The operation of the motor 48, the clutch 49, the drying fan 55, the heater 56, the drain valve 74, the cooling fan 79, the water supply valve 70, the water absorption pump 91, the air pump 40, and the like is controlled, washed, rinsed, dehydrated, and dried. Control each stroke. The input setting unit 83 and the display unit 84 constitute an operation display unit 85.

  Further, the control means 87 determines the presence or absence of washing water and the detergent based on the conductivity of the washing liquid obtained from the conductivity detection means 78, the infrared transmission obtained from the turbidity detection means 92, and the rate of change thereof. Detects the type and degree of dirt on clothing, and controls each process.

  Then, the control means 87 turns off the heater 56 when the temperature detected by the temperature detection means 63 reaches a first predetermined temperature (for example, 110 ° C.) during the drying process, and the temperature detection means 62 at that time. When the second predetermined temperature (for example, 2k) falls from the temperature due to the above, the heater 56 is operated to adjust the temperature of the circulating air.

  The storage unit 97 includes a non-writable nonvolatile memory that stores data necessary for control by the control unit 87.

  The notification means 98 is constituted by a piezoelectric buzzer or the like, and performs a notification operation such as when the operation is completed or when an abnormality occurs by the output of the control means 87.

  The operation and action of the washing machine configured as described above will be described with reference to FIGS. 3, 4, and 5.

  FIG. 3 is a flowchart of washing control of the fully automatic washing machine according to Embodiment 1 of the present invention, FIG. 4 is a flowchart of conductivity determination 1 described in FIG. 3, and FIG. It is a flowchart of the electrical conductivity determination 2 of description.

  In the washing process, the user opens the outer lid 69, opens the inner lid 66, puts clothes into the inner tub 44, sets an operation course with the input setting means 83, and starts operation (step S100). The cloth amount detected by the cloth amount detecting means 93 is detected, the control means 87 determines the water level and the detergent amount according to the cloth amount, and tentatively determines the subsequent sequence, and displays it on the display means 84. (Step S101).

  As described above, the water levels are set from rank 1 to rank 9, and rank 9 is a high water level. FIG. 3 shows an example in which the amount of cloth is large and a high water level is detected.

  Rank 1 is a water level that is approximately 100 mm lower than the upper surface of the outer peripheral portion of the pulsator 46 and the conductivity detecting means 78 is immersed in water.

  Thereafter, the water supply valve 70 with a small flow rate is operated in the water supply b to start water supply to the cleaning hose 72 side, and through the cleaning pipe 77, through the drainage duct 75 and the connection duct 53, from the lower side to the tank, Water is supplied to such a level that the conductivity detecting means 78 is not immersed, that is, a level lower than rank 1 (step S102).

  And the water level state of the supplied water is determined (step S103), and when the water level detected by the water level detection means 90 is less than rank 1, conductivity determination 1 is performed (step S104).

  Here, when the water level detected by the water level detection means 90 is rank 1 or higher, there is a possibility that the conductivity detection means 78 is already immersed in water for some reason, such as when the user puts water in a bucket. Therefore, the determination is not performed and the process proceeds to step S117.

  The operation and action of the conductivity determination 1 (step S104) will be described with reference to the flowchart of FIG.

  When the conductivity determination 1 is started (step S200), the number of times of abnormality detection (N1) is called from the storage unit 97 (step S201). Next, it is determined whether or not the conductivity detecting means 78 detects that water has not reached Rank 1 (step S202).

  When the conductivity detecting unit 78 detects a water-free state that water has not reached to rank 1, it is determined to be normal, and the number of abnormal detections (N1) is set to 0 (step S203). Store (step S205) and end the conductivity determination 1 (step S206). Here, the number of times of abnormality detection (N1) is set to 0. Even if the abnormality determination was performed in the previous operation, the dirt is removed after the previous abnormality determination due to the determination that the current operation is normal, and the normal state is restored. This is because it was determined that

  Further, when the conductivity detecting means 78 detects the water presence state that water has reached rank 1, there is a contradiction with the water level detected by the water level detecting means 90. In this case, it is determined that the conductivity detecting means 78 has detected the presence of water even though there is no water because of dirt such as detergent residue and lint, and the number of times of abnormality detection is one time. Increase (step S204), and store in the storage means 97 (step S205), as in the case of normal determination, and end the conductivity determination 1 (step S206).

  When the conductivity determination 1 is completed and the result of determination in step S105 of FIG. 3 is that there is an abnormality (N1 ≠ 0), the number of times of abnormality (N1) is confirmed (step S106), and the number of abnormalities is a predetermined number of times. In the case of the above (for example, 5 times), the notification means 98 notifies the abnormal state (step S107).

  Further, if the number of abnormalities (N1) is less than the predetermined number although it is abnormal, the process proceeds to water supply a without performing determinations such as conductivity determination 2 (step S108) and D0 determination (step S112) described later (step S117), the subsequent operation is continued. This is because the number of abnormalities is less than the predetermined number, and by continuing the operation, dirt such as detergent residue and lint may be removed.

  In FIG. 3, if the result of conductivity determination 1 is normal in step S105, conductivity determination 2 is performed (step S108).

  The operation and action of the conductivity determination 2 (step S108) will be described with reference to the flowchart of FIG.

  When the conductivity determination 2 is started (step S300), the number of abnormality detection (N2) is called from the storage means 97 (step S301). Next, in the water supply b, that is, the water supply valve 70 with a small flow rate is operated, the water is supplied from the lower side into the tank through the drainage duct 75 and the connection duct 53 via the cleaning hose 72 and the cleaning pipe 77 (step). S302), the water level detected by the water level detection means 90 is supplied to the water level that is detected as rank 1, that is, the water level at which the conductivity detection means 78 is immersed (step S303).

  Next, it is determined whether or not the conductivity detecting means 78 detects that water has reached rank 1 (step S304).

  When the conductivity detecting unit 78 detects that water has reached rank 1, it is determined to be normal, the number of abnormal detections is set to 0 (step S305), and stored in the storage unit 97 (step S306). The rate determination 2 ends (step S308).

  However, if the conductivity detection means 78 does not detect rank 1 in step S304, even though the conductivity detection means 78 has water up to rank 1 due to a circuit failure, lead wire disconnection, etc. It is determined that a water-free state is detected, the number of abnormality detections is increased by 1 (step S307), stored in the storage means (step S306), and the conductivity determination 2 is terminated (step S308).

  In step S109 of FIG. 3, when the conductivity determination 2 is completed and it is determined that there is an abnormality as a result of the determination (N2 ≠ 0), the number of abnormalities (N2) is equal to or greater than a predetermined number (for example, three times) (step S110). Notifies the abnormal state by the notification means 98 (step S111).

  If the number of abnormalities (N2) is less than the predetermined number, the process proceeds to water supply a (step S117) without performing a determination such as D0 determination (step S112) described later, and the subsequent operation is continued. To do. By making a plurality of times until the abnormality is notified, erroneous notification due to erroneous determination can be reduced, and the subsequent driving operation can be performed more accurately.

  If the conductivity determination 2 is completed and the result of determination in step S109 is normal, the turbidity detection D0 determination (step S112) is performed, and the turbidity of the supplied tap water is detected as turbidity detection. The data is detected by the means 92 and the data is input to the control means 87. When the water supply valve 70 having a large flow rate is operated and tap water is supplied into the inner tank 44 through the water supply hose 73, the tap water passes through dirty clothes and accumulates in the drain duct 75. Although turbidity is not detected, a small amount of water is supplied from the cleaning pipe 77 side, so that accurate turbidity can be detected.

  Then, when the amount of detergent corresponding to the set water level is automatically charged into the outer tub 43 by the liquid detergent automatic charging device 64 (step S113), the transmission mechanism unit is then closed with the drain valve 74 closed. The clutch 49 is switched to the dewatering side, the power of the motor 48 is transmitted to the inner tank 44 through the dehydrating shaft and rotated, and the inner tank 44 and the pulsator 46 are rotated together at a low speed of about 100 r / min (tank Rotation operation) (step S114). As a result, the washing liquid in the tub slowly rotates between the inner tub 44 and the outer tub 43 by the action of centrifugal force, and the detergent is sufficiently dissolved without the washing liquid adhering to the dirt on the clothes. Then, after the tank rotation operation is stopped (step S115), D1 determination of turbidity detection (step S116) is performed, and the initial value of turbidity due to the detergent of the washing liquid is detected by the turbidity detecting means 92, The data is input to the control means 87, and the type of detergent is determined by eliminating the turbidity of tap water detected in the previous step (D0 determination).

  Next, the large flow rate water supply valve 70 is operated to supply tap water into the inner tub 44 through the water supply hose 73 and to the rank 3 (step S117), and the motor is driven by the clutch 49 of the transmission mechanism section. The power of 48 is transmitted to the pulsator 46 through the washing shaft, and the agitation that the pulsator 46 rotates is performed (step S118), and further water is supplied up to rank 5 (step S119). A plurality of water level detection of rank 2 or higher at the time of water supply is performed by the pressure type water level detection means 90.

  By these operations, at a water level lower than the rated water level, in this case, a so-called detergent high-concentration agitation is performed at a water level 4 ranks below the high water level, foaming is sufficiently performed, and dirt on clothes is also contained in the washing liquid. Is eluted. Then, the turbidity detection D2 determination is performed after stopping (step S121), and the turbidity of the washing liquid is detected by the turbidity detection means 92, and data indicating whether the clothes are dirty or small is the control means. 87, and is calculated together with the values of the D0 determination and D1 determination described above.

  Based on the calculation result, it is determined whether or not the time for washing and stirring c (step S123) and washing and stirring d (step S125) can be shortened, and the subsequent sequence is determined.

  When the sequence is determined, the water supply valve 70 with a large flow rate is operated, and the water supply into the inner tank 44 is started via the water supply hose 73, and the water is supplied to the rated water level, in the case of FIG. 3, to the high water level (rank 9). (Step S122). When the water supply is finished, the washing stirring c for the determined time (step S123) starts, and the pulsator 46 rotates, whereby the clothes are caught by the stirring protrusion 11 of the pulsator 46 and pulled into the center. The clothing at the center lower layer portion of the inner tub 44 is pushed up to the upper layer portion of the inner tub 44 by the drawn-in clothing. In this way, the clothes in the inner tub 44 are agitated, and the dirt contained in the garments is performed by the mechanical force acting by the contact between the clothes, or the inner wall of the inner tub 44 and the pulsator 46, and the hydrodynamic force. The turbidity of the washing water gradually changes as it elutes into the washing water.

  Even after the washing agitation c (step S123) of the washing process is started at a predetermined rated water level (ranks 6 to 9), the turbidity detecting means 92 performs D3 determination (step S124) of turbidity detection of the washing liquid, It is possible to verify whether or not the control based on the detection determined in D2 is reasonable, and to correct the subsequent stirring d (step S125). After the completion of the stirring d (step S125), the process proceeds to the next step such as rinsing or dehydration (step S126).

  Although not shown, the number of times of rinsing performed in the next process can be omitted depending on the degree of dirt on the clothes and the amount of clothes.

  As described above, in the present embodiment, the control means is configured such that when the water level detecting means does not detect the predetermined water level, the conductivity detecting means detects the water level. By determining that the detection means is in an abnormal state, it is possible to make a highly reliable determination and appropriately control the subsequent strokes.

  The control means determines that the conductivity detecting means is in an abnormal state when the water level detecting means detects the predetermined water level but the conductivity detecting means does not detect the water level. Therefore, it is possible to make a highly reliable determination and appropriately control the subsequent steps.

  Further, the control means controls the subsequent process without using the conductivity detection means without stopping the process when the conductivity detection means determines that the normal detection cannot be performed. Since it continues, there is no dissatisfaction that the user cannot wash.

  In addition, the control means stores the number of times in the storage means when the conductivity detection means determines that the detection cannot be performed normally, and the conductivity detection means detects normally over a predetermined number of times. When it is determined that the state cannot be performed, the notification unit notifies the user that the conductivity detection unit cannot be normally determined.

  As described above, since the fully automatic washing machine according to the present invention can determine whether or not the conductivity can be correctly detected, it can be applied to various washing machines and the like.

43 Outer tank 44 Inner tank 46 Pulsator 48 Motor (drive means)
53 Connection duct 75 Drain duct 78 Conductivity detection means 87 Control means 90 Water level detection means 92 Turbidity detection means 97 Storage means 98 Notification means

Claims (4)

An outer tank that is elastically suspended in the housing, an inner tank that is rotatably supported in the outer tank, a pulsator provided on the inner bottom of the inner tank, and the inner tank or the pulsator is driven to rotate. Drive means, conductivity detection means for detecting the conductivity of washing water, provided at a position lower than the upper surface of the outer periphery of the pulsator at the lower portion of the outer peripheral side wall of the outer tub, and a water level detection for detecting the water level in the inner tub And a control means for sequentially controlling a series of steps of washing, rinsing, dehydration and drying, and the control means is configured such that the water level detecting means detects a predetermined water level. A washing machine that determines that the conductivity detecting means is in an abnormal state when the conductivity detecting means detects the water level. The control means determines that the conductivity detecting means is in an abnormal state when the water level detecting means detects a predetermined water level but the conductivity detecting means does not detect the water level. 1. The washing machine according to 1. 3. The washing machine according to claim 1, wherein the control unit controls a subsequent process without using the conductivity detection unit when it is determined that the conductivity detection unit cannot perform normal detection. 4. The control means stores the number of times when it is determined that the conductivity detection means cannot perform normal detection, and determines that the conductivity detection means cannot perform normal detection more than a predetermined number of times. The washing machine according to claim 1 or 2, wherein notification is given in the event of a failure.

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