JP2017080011A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure safety of a user when drainage abnormality is detected, in the case where a washing operation with warm water is executed.SOLUTION: A washing machine of the embodiment includes: determination means for determining whether or not a warm water washing operation using warm water is executed; drainage abnormality detection means for detecting abnormality of drainage from a washing tub; abnormality notification means for notifying drainage abnormality when the drainage abnormality detection means has detected abnormality in drainage; and notification control means for further delaying timing of performing abnormality notification by the abnormality notification means when the drainage abnormality detection means has detected drainage abnormality compared to the case of a normal washing operation using normal temperature water, when it is determined by the determination means that the warm water washing operation is executed.SELECTED DRAWING: Figure 1

Description

  Embodiments described herein relate generally to a washing machine.

  For example, a drum-type washing machine has been proposed in which a heater is provided in the lower part of a water tank and water stored in the water tank (washing tank) is heated by the heater (for example, Patent Document 1). reference). With such a configuration, it is expected that the washing performance can be improved by heating the water in the water tank during washing to warm the water and executing the washing process with the warm water. In Patent Document 1, in order to ensure the safety of the user, the driving of the circulation pump is stopped when the temperature of the washing water exceeds a predetermined temperature during the washing operation with warm water. Yes.

JP 2012-170688 A

  By the way, in the washing machine, in the drainage after the washing process, when the water level of the water tank does not decrease to the predetermined water level after a predetermined time since opening the drain valve, it is determined that the drainage is abnormal, and the user is informed of the abnormality, It is promoted to check the filter. When the washing operation is performed with warm water as described above, since warm water remains in the filter portion, it is important to ensure safety when the user tries to check the filter.

  Then, the washing machine which can ensure the safety | security of the user at the time of detecting the waste_water | drain abnormality in the case of the washing operation by warm water being performed is provided.

  The washing machine according to the present embodiment is capable of executing a washing operation using warm water in a washing tub, and is configured to determine whether or not a warm water washing operation using warm water is being performed. The waste water abnormality detecting means for detecting the abnormality of the waste water from the washing tub, the abnormality notifying means for notifying the abnormality of the waste water when the waste water abnormality detecting means detects the abnormality of the waste water, and the hot water washing operation by the judging means. When it is determined that the drainage abnormality is detected, the timing of the abnormality notification by the abnormality notification unit when the drainage abnormality detection unit detects a drainage abnormality is delayed compared to the case of normal washing operation using normal temperature water. And a notification control means for making it possible.

  Another washing machine of the present embodiment is capable of executing a washing operation using warm water in a washing tub, and detects waste water abnormality detecting means for detecting abnormality of waste water from the washing tub, An abnormality notification means for notifying a drainage abnormality when the drainage abnormality detection means detects a drainage abnormality, a water temperature detection means for detecting the temperature of the wash water in the washing tub, and the drainage abnormality detection means detecting a drainage abnormality And a notifying control means for notifying the abnormality by the abnormality notifying means on condition that the water temperature detected by the water temperature detecting means is lower than a predetermined temperature.

1 is a vertical right side view schematically showing the overall configuration of the washing machine according to the first embodiment. The perspective view which shows the structure of the heater unit part of a water tank bottom part Top view of the operation panel Block diagram showing the electrical configuration of the washing machine Flow chart showing the process flow in the hot water cleaning course The flowchart which shows the control procedure which a control device performs at the time of drainage abnormality detection The figure which shows 2nd Embodiment and shows the relationship between the water temperature at the time of detecting drainage abnormality, and the delay time until abnormality notification is performed. The figure which shows 3rd Embodiment and shows the example of a display of the front | former alert | report (a) and abnormality alert | report (b) in a display apparatus.

(1) First Embodiment Hereinafter, a first embodiment applied to a drum-type washing machine equipped with a circulation pump will be described with reference to FIGS. 1 to 6. First, the overall configuration of the washing machine 1 according to the present embodiment will be described with reference to FIG. The washing machine 1 has a substantially rectangular box shape and has an outer box 2 constituting the washing machine body. A laundry entrance 3 is provided at the center of the front surface of the outer box 2, and a door 4 that opens and closes the laundry entrance 3 is disposed.

  Although not shown in detail, the outer box 2 is provided with a door switch 5 for detecting the open / closed state of the door 4, and a door lock mechanism 6 for locking the door 4 in a closed state (both shown in FIG. 4). (Shown only in FIG. 2). As will be described in detail later, an operation panel 40 (see FIG. 3) is provided at the upper front of the outer box 2, and the entire drum type washing machine 1 is controlled on the back side (in the outer box 2). A control device 41 is provided as control means.

  In the outer box 2, a horizontal-axis cylindrical water tank 7 is supported via a plurality of (for example, a pair of left and right) suspensions 8 (only a part of which is shown in the figure) in a state where the water tank 7 is inclined slightly downward. An outer rotor type motor 9 made of, for example, a brushless DC motor is disposed at the center of the rear end side of the water tank 7. A cylindrical drum 10 as a washing tub in which laundry (clothing) is accommodated is rotatably supported in the water tub 7. The drum 10 is configured to rotate about an inclined axis extending in the front-rear direction and slightly inclined rearwardly downward. A rotating shaft 9 a of the motor 9 passes through the back surface of the water tank 7 and is connected to the central portion on the rear end side of the drum 10. Thus, the drum 10 is directly driven to rotate by the motor 9. The motor 9 is provided with a rotation sensor 39 (shown only in FIG. 4) for detecting the position of the motor 9.

  A large number of holes 10a for water passage (ventilation) are formed in the peripheral wall portion of the drum 10, and a plurality (for example, 3) for scraping up laundry (for stirring) are formed on the inner peripheral surface portion of the drum 10. Pieces of baffles 11 are provided. An opening 12 through which clothing is taken in and out is provided on the front surface of the drum 10. An input port 13 connected to the opening 12 is formed on the front surface of the water tub 7, and the input port 13 and the laundry entrance 3 communicate with each other via a bellows 14.

  A drain port 15 is formed in the bottom of the water tank 7 on the back side. A base end portion of the in-machine drain hose 16 is connected to the drain port 15. A filter unit 17 is provided on the bottom plate 2a constituting the bottom of the outer box 2 so as to be positioned on the front side. Although not shown in detail, the filter unit 17 is configured by accommodating a lint filter in a cylindrical case, and a cap 18 is attached to the front opening of the filter unit 17 so as to be openable and closable. The lint filter has a function of capturing relatively large lint (lint) in the washing water. The outer box 2 is provided with an opening for taking in and out (for inspection by a user) located in front of the cap 18, and the opening is closed by a cover 2b so as to be opened and closed.

  A hose connection port 17a is provided at the upper part of the filter unit 17, and the tip of the in-machine drain hose 16 is connected to the hose connection port 17a. A drain valve 19 is connected to the lower portion of the filter unit 17, and a drain pipe 20 is connected to the outlet side of the drain valve 19. The distal end of the drain pipe 20 faces the outside of the machine through the bottom plate 2a and is connected to an unshown outside drain hose. Thus, when the drain valve 19 is opened, the wash water in the water tank 7 is discharged from the drain pipe 20 after passing through the filter unit 17.

  A circulation pump 21 is provided at the rear end of the filter unit 17. The circulation pump 21 has a suction port facing the filter unit 17 and sucks the water in the water tank 7 and the drum 10 through the drain port 15, the in-machine drain hose 16 and the filter unit 17. A discharge port 21a is provided in the upper part of the circulation pump 21, and a proximal end portion of a water supply hose 22 is connected to the discharge port 21a. The water supply hose 22 has an intermediate portion that extends upward from the circumferential side of the bellows 14, and a tip portion of the water supply hose 22 is connected to a fountain nozzle 23 formed at the upper portion of the inlet 13 of the water tank 7.

  The fountain nozzle 23 is configured to inject the washing water in the direction of the arrow X toward the inner lower portion of the drum 10 (strictly, the lower right portion as viewed from the front). Accordingly, when the circulation pump 21 is driven, the washing water in the water tank 7 passes through the drain port 15, the in-machine drain hose 16, the filter unit 17, and the water supply hose 22, and then showers into the drum 10 from the fountain nozzle 23. The water is discharged into the shape. When washing water passes through the filter unit 17, a relatively large lint is captured by the lint filter.

  An air trap 24 is provided at an upper front portion of the filter unit 17. On the other hand, a water level sensor 25 is disposed at the top of the outer box 2. The air trap 24 and the water level sensor 25 are connected by an air tube 26. Thus, the water level sensor 25 detects the water level in the water tank 7 through the in-machine drain hose 16, the filter unit 17, the air trap 24 and the air tube 26.

  At this time, if the lint filter in the filter unit 17 is clogged during draining with the drain valve 19 opened, the washing water in the water tank 7 cannot be drained smoothly. As will be described later, based on the water level detected by the water level sensor 25 at the time of drainage, the control device 41 maintains the water level in the water tank 7 even if a certain time (for example, 4 minutes) has elapsed since the drainage valve 19 was opened. When the water level does not drop to the predetermined reset water level, it is determined that the drainage is abnormal, and the drainage abnormality is notified. Accordingly, the control device 41, the water level sensor 25, and the like constitute drainage abnormality detection means.

  On the other hand, a water supply mechanism 27 for supplying water into the water tank 7 is provided in the upper part of the outer box 2. That is, a water supply port 28 connected to the water supply is provided on the upper surface of the rear end of the outer box 2. The water supply port 28 is connected to a water supply valve 29, and the water supply valve 29 is connected to an inlet portion of the water injection case 31 through a connection pipe 30. An outlet portion of the water injection case 31 is connected to the water tank 7 via a water supply hose 32. Although not shown, a detergent storage section and the like are provided inside the water injection case 31. Thus, tap water is supplied from the water supply port 28 to the water tank 7 through the water supply valve 29, the connection pipe 30, the water injection case 31, and the water supply hose 32 by the opening operation of the water supply valve 29.

  In the present embodiment, as shown in FIG. 2, a recess 33 is provided in the left portion of the portion where the wash water is stored at the bottom of the water tank 7, and is located in the recess 33. A heater unit 34 for generating hot water in the water tank 7 is provided. The heater unit 34 includes, for example, a warm water heater 35 formed of a sheathed heater, a heater cover 36 that protects the water tank 7 from the heat of the warm water heater 35, a heater holder 37 that holds the warm water heater 35 on the heater cover 36, and the like. The heater unit 34 functions as hot water supply means for generating hot water in the water tank 7 (drum 10). In the recess 33, for example, a thermistor is provided, and a water temperature sensor 38 is provided as a water temperature detecting means for detecting the temperature of the washing water (the vicinity of the heater unit 34).

  Although not shown, a drying unit is provided in the outer box 2 for circulating and supplying hot air into the drum 10 to dry the laundry. The drying unit includes a circulation duct provided so as to connect an air supply port and an exhaust port provided in the water tank 7 on the outside of the water tank 7, a blower fan, a heater, and the like provided in the circulation duct. ing. A dehumidifying means (for example, a heat pump) may be provided in the circulation duct.

  Here, the operation panel 40 will be described with reference to FIG. The operation panel 40 is provided with a power-on key 42 and a power-off key 43, and a start key 44 for starting and temporarily stopping the washing operation. Further, a course selection key 45 for selecting one of the courses for automatically executing the washing operation and a course display unit 46 for displaying the selected (set) course are provided. Of course, “standard course” is set as a default setting, and when there is no user operation, the standard course is automatically set. In this embodiment, as will be described later, it is possible to execute a “warm water cleaning course” (60 ° C. sterilization course) in which a washing process is performed using warm water, which is a temperature higher than normal temperature and at which the cleaning effect is improved. It has become.

  Further, the operation panel 40 has a manual operation key 47 for manually setting the time and number of times of each washing operation, a water level, and the like, and a setting display section 48 for performing necessary display regarding manual setting, for example, four pieces. A time display unit 49 using a segment display is provided. The time display section 49 displays necessary information such as the remaining time and the number of times during the washing operation, and also notifies an error (abnormality) when an error or abnormality occurs, and functions as a display device. At this time, when drainage abnormality is detected, which will be described later, an abnormality display such as “C1” is displayed on the time display unit 49, and a buzzer 51 (shown only in FIG. 4) is sounded.

  FIG. 4 schematically shows the electrical configuration of the washing machine 1 with the above-described control device 41 as the center. The control device 41 is configured mainly by a microcomputer including a CPU, a ROM, a RAM, and the like, and controls the entire washing machine 1 to execute each step of the washing operation. The control device 41 is connected to a nonvolatile memory 50 such as an EEPROM as storage means. The control device 41 receives operation signals from the operation units (operation keys 42 to 45, 47) of the operation panel 40, and the control device 41 displays the display units 46, 48, 49 of the operation panel 40. The display of is controlled.

  Further, detection signals from the water temperature sensor 38, the water level sensor 25, the door switch 5, and the rotation sensor 39 are input to the control device 41. The control device 41 controls the buzzer 50 for notification. The control device 41 drives and controls the motor 9 via the motor drive circuit 52, and the water supply valve 29, the drain valve 19, and the circulation pump 21 via the drive circuits 53, 54, 55, 56, and 57. The hot water heater 35 and the door lock mechanism 6 are respectively controlled.

  With the above-described configuration, the control device 41 can control each mechanism of the washing machine body 1 based on the input signal from each sensor and the control program stored in advance according to the operation course set by the user on the operation panel 40. The washing operation including the well-known washing, rinsing, and dehydration processes is automatically executed. At this time, the control device 41 controls the door lock mechanism 6 in conjunction with execution of the washing operation. During the normal washing operation, the door lock mechanism 6 locks the door 4 in the closed state, and the operation is performed. When finished, the door 4 is unlocked.

  Now, in this embodiment, based on the course selection by operation of the user's operation panel 40, the control apparatus 41 can perform the washing operation of a warm water washing course (60 degreeC sterilization course). In this warm water washing course, the washing process is executed with warm water higher than the normal temperature (room temperature) and higher than the first temperature (for example, 58 ° C.) effective for sterilization of clothing. After the water supply into the water tub 7 by the wear configuration (execution of the control program), the washing process is advanced while the washing water is heated to around 60 ° C. by the hot water heater 35.

  Further, as will be described later in the explanation of the operation, in the hot water cleaning course, the control device 41 performs the drainage after executing the cooling process for cooling the drum 10 (water tank 7) after the completion of the cleaning process using the hot water. The first dehydration in the rinsing process is proceeded. Further, in the warm water cleaning course, in the first dehydration process after the washing process, the maximum rotation speed of the motor 9 is set lower than that in the course not using hot water (the maximum rotation speed is 1200 rpm, for example) (for example, 400 rpm). )

  And in this embodiment, as above-mentioned, even if fixed time (for example, 4 minutes) passes since the control apparatus 41 opened the drain valve 19 in the process of the drainage which drains from the water tank 7, When the water level in the water tank 7 detected by the water level sensor 25 does not drop to a predetermined reset water level, it is determined that the drainage is abnormal, and the drainage abnormality is notified. Specifically, the time display unit 49 of the operation panel 40 is notified of an abnormality, for example, an error display “C1” and the buzzer 51 is sounded. The error display “C1” is a display prompting the user to check the filter unit 17. Accordingly, the control device 41, the time display unit 49, the buzzer 51 and the like constitute an abnormality notification unit.

  At this time, in this embodiment, as will be described in the following description of the operation (flowchart description), when the control device 41 detects the drainage abnormality, the abnormality notification timing is given when the hot water cleaning course is being executed. Is delayed compared to the case of normal washing operation using room temperature water. Specifically, in the case of the normal washing operation, the abnormality notification is performed immediately after detecting the drainage abnormality or after a certain time (for example, 0 to 5 minutes) after the detection time.

  On the other hand, when the hot water cleaning course is being executed, the control device 41 detects the water discharge abnormality after the predetermined waiting time (for example, 10 minutes) has elapsed when the drainage abnormality is detected. It is determined whether or not the water temperature is lower than a predetermined temperature (second temperature), for example, 48 ° C., and an abnormality is notified on condition that the water temperature is lower than the predetermined temperature (48 ° C.). That is, when a drainage abnormality is detected, the abnormality notification is made after a delay time of 10 minutes or longer. Therefore, the control device 41 also functions as a determination unit and a notification control unit.

  However, in the present embodiment, the control device 41 is configured to notify the abnormality unconditionally after the maximum delay time (for example, 70 minutes) has elapsed after detecting the drainage abnormality. Here, the water temperature is determined after elapse of a predetermined standby time, but it is determined whether the detected water temperature of the water temperature sensor 38 is lower than the second temperature without waiting for the elapse of the standby time, When the temperature is lower than the second temperature, the abnormality notification may be performed after a predetermined standby time (for example, 10 minutes) has elapsed.

  Next, the operation of the washing machine 1 configured as described above will be described with reference to FIGS. The flowchart of FIG. 5 shows the detailed steps (processing steps) of the hot water washing course in which the control device 41 performs the hot water washing operation, that is, the steps of washing, rinsing, and dewatering. When the user wants to execute the washing operation of the hot water washing course, the user puts clothes into the drum 10, puts a necessary amount of detergent into the water injection case 31, and then operates the operation panel 40 to perform the hot water washing course. After setting, the start key 44 is turned on. Note that the door 4 is locked in the closed state by the door lock mechanism 6 in accordance with the ON operation of the start key 44.

  Then, as shown in FIG. 5, a cloth amount determination routine is first executed in step S1. This cloth amount determination utilizes the fact that the rotational load of the drum 10 changes according to the cloth amount. The drum 10 is rotated for a predetermined short time before water supply, and the motor 9 rotates at that time. The number (number of output pulses of the rotation sensor 39) is detected. The amount of cloth is determined, for example, in three stages of “large”, “medium”, and “small”. In step S2, a washing process is started, and the water supply valve 29 is driven to supply an appropriate amount of supply water according to the amount of cloth, and the wash water is stored in the water tank 7 (drum 10) to an appropriate level. .

  In step S3, the hot water heater 35 is turned on and the washing water in the water tank 7 (drum 10) is heated. For example, the hot water heater 35 is energized continuously until the temperature of the washing water detected by the water temperature sensor 38 reaches a target temperature (for example, 65 ° C.) slightly higher than the set temperature (first temperature), and then the hot water heater 35 is turned off. Is done. In step S4, a warm water washing operation for a predetermined time (for example, 15 minutes) is executed. This washing operation is performed by rotating the drum 10 alternately at predetermined time intervals in the forward direction and the reverse direction at a relatively low speed, and by appropriately driving the circulation pump 21. Thus, a washing process having a high washing effect is performed using hot water having a temperature equal to or higher than the first temperature (for example, 58 ° C.).

  When the warm water washing operation (washing process) is completed, the cooling process is executed. In this cooling process, first, water supply is performed for about 1 minute in step S5, and a stirring operation by forward and reverse rotation of the drum 10 is performed, for example, for 2 minutes in the next step S6. Thereby, the wash water is diluted with low-temperature tap water and its temperature is lowered, and the temperature of the water tank 7 (drum 10) is also lowered. After completion of the cooling process, in step S7, the drain valve 19 is operated to drain the water.

  When the drainage is completed, a rinsing process is executed in steps S8 to S13. Here, as the rinsing process, the first dehydration in step S8, the shower rinsing in step S9, the high-speed dehydration in step S10, the rinsing for step S11, the high-speed dehydration in step S12, and the rinsing operation for step S13 are executed in order. . At this time, in the first dehydration process of step S8, the drum 10 is rotated in one direction with the drain valve 19 opened. At this time, the maximum rotation speed of the motor 9 is limited to 400 rpm. In the high-speed dehydration in steps S10 and S12, the drum 10 is rotated in one direction at a high speed with the drain valve 19 opened, and the maximum rotational speed of the motor 9 at this time is set to 1200 rpm, for example.

  The shower rinsing in step S9 is performed by driving the circulation pump 21 while rotating the drum 10 in the forward / reverse direction at a low speed after supplying water up to a predetermined water level in the water tank 7, and then draining. Rinsing for steps S11 and S13 is performed by rotating the drum 10 in the forward and reverse directions at a low speed after water supply to a predetermined water level in the water tank 7, and then draining. When this rinsing process is completed, a final dehydration process is executed in step S14. In this final dehydration process, the drum 10 is rotated in one direction at a high speed with the drain valve 19 being opened. The maximum rotation speed of the motor 9 at this time is set to 1200 rpm, for example. After the final dehydration process, the door 4 is unlocked and the power is turned off.

  As described above, the control device 41 always determines whether or not there is a drainage abnormality during a plurality of times of drainage in the washing operation, and notifies the drainage abnormality when the drainage abnormality is detected. The flowchart of FIG. 6 shows a processing procedure related to determination (detection) and abnormality notification of drainage abnormality during drainage after the washing process, which is executed by the control device 41. That is, when the power is turned on in step S21 and the washing operation is started in step S22, the washing process is executed in step S23.

  When the washing process (or the subsequent cooling process) is completed, the drain valve 19 is opened in step S24, and the drain process is started. In this drainage process, in step S25, the water level in the water tank 7 is always monitored by the water level sensor 25 to determine whether the reset water level has been reached (decreased). If the reset water level has not been reached (No in step S25), it is determined in step S26 whether a predetermined time (for example, 4 minutes) has elapsed. This predetermined time is set to a sufficient time from the opening of the drain valve 19 to the reset water level when there is no abnormality such as clogging of the lint filter in the drain path.

  Until the predetermined time elapses (No in step S26), the process returns to step S25 to determine whether the reset water level has been reached (decreased). If the reset water level is reached before the predetermined time has passed (Yes in step S25), it is determined that drainage has been performed normally (no drainage abnormality), and in step S27 for a certain period of time (for example, 10 seconds) In step S28, it is determined that the drainage is completed, and the process proceeds to the next step in step S29.

  On the other hand, when the predetermined time (4 minutes) has passed with the detected water level not lowered to the reset water level (Yes in step S26), it is determined that the drainage is abnormal (detected) in step S30. Is done. In this case, in the next step S31, it is determined whether a course using warm water (hot water washing operation) is being executed. In the case of a normal washing operation in which hot water is not used, that is, normal temperature water is used (No in step S31), an abnormality notification of drainage abnormality is made in step S32. This abnormality notification is performed by displaying an error “C1” on the time display section 49 of the operation panel 40 and sounding the buzzer 51. The abnormality notification at this time may be performed immediately after detecting the drainage abnormality, or may be performed after a certain time (for example, 0 to 5 minutes) after the detection point of the drainage abnormality.

  On the other hand, when the hot water washing operation is being executed (Yes in step S31), in step S33, it is determined whether or not a predetermined standby time (for example, 10 minutes) has elapsed since the drainage abnormality was detected. The When the predetermined standby time (10 minutes) has elapsed (Yes in step S33), the water temperature is detected by the water temperature sensor 38 in step S34. In step S35, it is determined whether or not the detected water temperature of the water temperature sensor 38 is lower than a predetermined temperature (for example, 48 ° C.). If the detected water temperature of the water temperature sensor 38 is lower than the predetermined temperature (Yes in step S35), an abnormality notification of drainage abnormality is performed in step S36.

  On the other hand, when the detected water temperature of the water temperature sensor 38 is equal to or higher than the predetermined temperature (48 ° C.) (No in step S35), the process proceeds to step S37, and the maximum delay time (70 minutes) has elapsed from the detection of the drainage abnormality. It is judged whether or not. If the maximum delay time (70 minutes) has not yet elapsed (No in step S37), the process returns to step S34, and the water temperature detection by the water temperature sensor 38 is performed again. If the maximum delay time (70 minutes) has elapsed (Yes in step S37), abnormality notification is performed unconditionally in step S38 regardless of the detected water temperature of the water temperature sensor 38.

  Thus, in a normal washing operation using room temperature water, an abnormality notification is promptly performed when a drainage abnormality is detected, and the user can quickly perform a lint filter inspection operation or the like. On the other hand, in the case of hot water washing operation using hot water, even if a drainage abnormality is detected in the process of drainage, the abnormality notification is not immediately performed and a predetermined delay time (10 minutes) is set. After being placed, that is, after a period of time for the water temperature of the washing water to drop to some extent due to natural cooling, for example, an abnormality notification is first made. In addition, at this time, since the notification is made on the condition that the detected water temperature of the water temperature sensor 38 is lower than the predetermined temperature (48 ° C.), the user can use the lint filter in a state where the washing water is lower than the predetermined temperature (48 ° C.). Inspection work can be performed safely. By setting a predetermined delay time, the washing water in the water tank 7 gradually decreases within that time, so that safety is enhanced from this viewpoint.

  Thus, according to the present embodiment, the following effects can be obtained. In the washing machine 1 of the present embodiment, warm water is generated in the water tank 7 by the warm water heater 35, and the washing operation of the warm water washing course in which a high washing effect can be obtained using the warm water becomes possible. However, since hot water having a temperature higher than room temperature is used, it is necessary to ensure safety for the user (person). At this time, if the drainage abnormality is detected and the abnormality notification is made, the user opens the cover 2b at the lower front of the outer box 2 and opens the cap 18 of the filter unit 17 for checking the lint filter. However, for example, the hot water remaining in the water tank 7, the water supply hose 16, the filter unit 17, and the drainage hose 22 may be applied to the user's hand or the like.

  However, in the present embodiment, when it is determined that the hot water washing operation using hot water is being performed when the drainage abnormality is detected, the control device 41 sets the abnormality notification timing to normal temperature. Compared with the case of normal washing operation using water, it is configured to delay. Therefore, since the abnormality notification is performed after the delay time has elapsed, the user can deal with the abnormality of drainage, such as checking the filter, in a safe state where the temperature has decreased. As a result, there is an excellent effect that it is possible to ensure the safety of the user when a drainage abnormality is detected when a washing operation with warm water is performed.

  In particular, in this embodiment, when the detected water temperature of the water temperature sensor 38 is lower than a predetermined temperature (48 ° C.), an abnormality notification is performed, and when it is equal to or higher than the predetermined temperature (48 ° C.), no abnormality notification is performed. The configuration. Thereby, in a state where sufficient safety is ensured, the user can take measures against drainage abnormality such as inspection of the filter. When the drainage abnormality is detected, even when the water temperature is relatively high, when the water temperature is sufficiently lowered, abnormality notification can be performed as quickly as possible.

  At this time, particularly in the present embodiment, the control device 41 determines whether or not to perform abnormality notification after a predetermined waiting time (10 minutes) has elapsed when a drainage abnormality is detected. As a result, even when the water temperature is relatively high, even if the water temperature is relatively high, it is possible to make a judgment by leaving a certain amount of room for the temperature to drop to some extent by passing the standby time. Despite this, it is possible to reduce the number of cases where abnormality notification is not performed.

  Moreover, in the present embodiment, the control device 41 unconditionally notifies the abnormality after the maximum delay time (70 minutes) has elapsed after detecting the drainage abnormality. If the abnormality notification is not performed in spite of the detection of the drainage abnormality, there is a possibility that the user may misunderstand that it is out of order. Therefore, by providing a maximum delay time, the abnormality notification is always performed after an appropriate time has elapsed. As a result, it is possible to prevent the user from having distrust.

(2) Second and Third Embodiments and Other Embodiments FIG. 7 shows a second embodiment. The difference from the first embodiment is as follows. That is, in the second embodiment, when the control device 41 detects the drainage abnormality, the timing for performing the abnormality notification so that the delay time becomes longer as the detected water temperature is higher based on the detected water temperature of the water temperature sensor 38. Is supposed to change. Specifically, when the water temperature at the time of detecting the drainage abnormality is less than 48 ° C., abnormality notification is performed 10 minutes after the detection time (after a predetermined waiting time has elapsed). Further, when the water temperature at the time of detecting the drainage abnormality is 48 ° C. or more and less than 58 ° C., an abnormality notification is given 20 minutes after the detection time. As described above, when the abnormality notification timing is changed in accordance with the water temperature at the time when the drainage abnormality is detected, and when the water temperature at the time when the drainage abnormality is detected is 63 ° C. or more, the abnormality notification is performed after 70 minutes.

  According to the second embodiment, as in the first embodiment, it is possible to ensure the safety of the user when a drainage abnormality is detected when a washing operation with warm water is being performed. There is an excellent effect. And since delay time is lengthened, so that the water temperature at the time of detecting drainage abnormality is high, even if the detected water temperature is comparatively high, abnormality notification can be performed in a state where the temperature is sufficiently lowered. In addition, when the water temperature is relatively low, the delay time is also relatively short, so that abnormality notification can be performed as quickly as possible.

  FIG. 8 shows the third embodiment, which is different from the first embodiment in an abnormality notification mode in the display device 61 provided in the operation panel 40. That is, in the third embodiment, a display device 61 made of, for example, a liquid crystal display device is provided. The display device 61 can freely display a character message, and functions as a notification unit that notifies the drainage abnormality together with the buzzer 51 and the like.

  When the hot water washing operation is being executed, the control device 41 allows a predetermined delay time of 10 minutes or more to be detected when a drainage abnormality is detected, as in the first and second embodiments. And anomaly notification. In this abnormality notification, as shown in FIG. 8 (b), the display device 61 displays a message indicating that there is a drainage abnormality and a text message that prompts inspection of the lint filter or the like. And in this 3rd Embodiment, after detecting drainage abnormality, the control apparatus 41 performs the front stage alert | report which informs the display device 61 that water temperature is high before performing abnormality alert | report.

  In this preceding notification, as shown in FIG. 8 (a), the display device 61 detects a drainage abnormality, but displays a text message that prompts the user to wait until the water temperature in the tank drops before the inspection is performed. The According to the third embodiment, by performing the first stage notification at the first stage, the user can know that the temperature is high, and then the water temperature is lowered and the second stage abnormality notification is performed. As a result, it is possible to take measures while ensuring safety. The preceding notification can also provide an advantage of eliminating the user's uncomfortable feeling in the delay time.

  Although not shown in the drawings, it can be configured as in other embodiments described below. That is, the control device 41 stores the hot water cleaning in the nonvolatile memory 50 as the storage unit when the power is turned off during the washing operation using the hot water. And when the hot water washing is memorize | stored in the said non-volatile memory 50 when the power supply is turned on, the control apparatus 41 is the said 1st irrespective of the presence or absence of use of the warm water in the washing operation after restarting. As in the third embodiment, it can be configured to execute control for delaying abnormality notification when a drainage abnormality is detected.

  According to this, when the power is turned off during the washing operation using hot water, there may be a case where the hot water or the high temperature state of each part remains even at the time of resumption, and then the washing operation was resumed. At the same time, when hot water cleaning is stored in the nonvolatile memory 50, the safety of the user can be improved by delaying the abnormality notification. Note that when the temperature in the aquarium 7 (washing water) is sufficiently lowered, the storage of the warm water washing in the nonvolatile memory 50 can be cleared.

  Further, in each of the above embodiments, the warm water heater 35 (heating means) is provided and the warm water washing operation is performed by heating water at room temperature (such as tap water). However, as the warm water supply means, When hot water can be supplied to the washing machine 1 from a water heater or the like, the remaining hot water of the bath (relatively high temperature warm water) can be supplied into the water tank 7 by a bath water pump. Even when the warm water is supplied and the washing operation is performed as described above, the control device can determine that the warm water washing operation is being performed.

  In addition, the washing machine is not limited to a drum-type washing machine, and can be applied to a so-called vertical-axis washing machine in which the central axis of the water tub and the rotating tub is directed in the vertical direction. In addition, specific numerical values of the time such as the water temperature such as the predetermined temperature and the standby time are merely shown as examples, and can be changed as appropriate. It can be implemented.

  In the drawings, 1 is a washing machine, 2 is an outer box (washing machine main body), 7 is a water tank, 10 is a drum (washing tank), 17 is a filter unit, 19 is a drain valve, 21 is a circulation pump, 25 is a water level sensor, 35 is a hot water heater (warm water supply means), 38 is a water temperature sensor (water temperature detection means), 40 is an operation panel, 41 is a control device (control means, drainage abnormality detection means, notification control means), 49 is a time display unit (abnormality) Notification means), 50 is a non-volatile memory (storage means), 51 is a buzzer (abnormality notification means), and 61 is a display device (abnormality notification means).

Claims (7)

A washing machine capable of performing a washing operation using hot water in a washing tank,
A determination means for determining whether or not a hot water washing operation using hot water is being performed;
Waste water abnormality detection means for detecting waste water abnormality from the washing tank,
An abnormality notifying means for notifying a drainage abnormality when the drainage abnormality detecting means detects a drainage abnormality;
When it is determined by the determination means that the hot water washing operation is being performed, the temperature of the abnormality notification means when the drainage abnormality detection means detects the abnormality of drainage is determined by using normal temperature water. A washing machine comprising notification control means for delaying compared to the case of normal washing operation. Water temperature detecting means for detecting the temperature of the washing water in the washing tub,
According to the water temperature detected by the water temperature detection unit when the drainage abnormality detection unit detects the drainage abnormality, the notification control unit causes the abnormality notification unit to increase the delay time as the water temperature increases. The washing machine according to claim 1, wherein the timing for performing abnormality notification is changed. A washing machine capable of performing a washing operation using hot water in a washing tank,
Waste water abnormality detection means for detecting waste water abnormality from the washing tank,
An abnormality notifying means for notifying a drainage abnormality when the drainage abnormality detecting means detects a drainage abnormality;
Water temperature detecting means for detecting the temperature of the washing water in the washing tub;
Washing | fitting provided with the alerting control means which alert | reports abnormality by the said abnormality alerting | reporting means on the condition that the water temperature detected by the said water temperature detecting means is less than predetermined temperature when the said wastewater abnormality detecting means detects a wastewater abnormality Machine.   4. The laundry according to claim 3, wherein when the drainage abnormality detection unit detects a drainage abnormality, the notification control unit determines whether or not abnormality notification is performed by the abnormality notification unit after a predetermined waiting time has elapsed. Machine. When the power is turned off during the washing operation using hot water, the storage means for storing the hot water washing is provided,
When the hot water washing is stored in the storage means when the power is turned on, the notification control means is configured to detect the abnormality in drainage regardless of whether hot water is used in the washing operation after resumption. The washing machine according to any one of claims 1 to 4, which performs control of abnormality notification when a drainage abnormality is detected.   The said notification control means performs abnormality notification by the said abnormality notification means unconditionally after the maximum delay time has elapsed after the drainage abnormality detection means detects the drainage abnormality. The washing machine described.   The notification control means performs a previous notification that the water temperature is high before the abnormality notification means detects the abnormality of the drainage and before the abnormality notification means notifies the abnormality. The washing machine according to any one of the above.

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