CN114016255B - Fault detection method and device for washing machine and washing machine - Google Patents

Fault detection method and device for washing machine and washing machine Download PDF

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Publication number
CN114016255B
CN114016255B CN202111397578.1A CN202111397578A CN114016255B CN 114016255 B CN114016255 B CN 114016255B CN 202111397578 A CN202111397578 A CN 202111397578A CN 114016255 B CN114016255 B CN 114016255B
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Prior art keywords
water
washing machine
water level
water inlet
valve
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CN202111397578.1A
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CN114016255A (en
Inventor
黎林坚
张跃栋
蔡谷奇
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F33/00—Control of operations performed in washing machines or washer-dryers 
    • D06F33/30—Control of washing machines characterised by the purpose or target of the control 
    • D06F33/47—Responding to irregular working conditions, e.g. malfunctioning of pumps 
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/081—Safety arrangements for preventing water damage
    • D06F39/082—Safety arrangements for preventing water damage detecting faulty draining operations, e.g. filter blockage, faulty pump
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/14—Supply, recirculation or draining of washing liquid
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/18—Washing liquid level
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/02—Water supply
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/58—Indications or alarms to the control system or to the user
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)

Abstract

The invention discloses a fault detection method and a fault detection device for a washing machine and the washing machine, wherein the method comprises the following steps: under the condition that a power key of the washing machine is pressed, controlling the first water inlet valve and the second water inlet valve to be opened and controlling the first drain valve to be closed; detecting the water level of a first water level detection area, and recording as a first water level; detecting the water level of a second water level detection area, and recording as a second water level; determining whether there is a water intake and discharge failure of the washing machine according to at least one of the first water level and the second water level; if the water inlet and outlet faults of the washing machine are determined, a reminding message of the water inlet and outlet faults of the washing machine is initiated under the condition that a starting key of the washing machine is pressed. This scheme through shortening the unusual check-out time of drain valve, promotes user's use and experiences.

Description

Fault detection method and device for washing machine and washing machine
Technical Field
The invention belongs to the technical field of washing machines, and particularly relates to a fault detection method and device for a washing machine and the washing machine, in particular to a method and device for detecting the abnormity of a drain valve in advance and the washing machine with the device.
Background
With the improvement of the quality of life of people, countless families use washing machines to replace manual washing. There are also some problems in the washing process of a washing machine that require the laundry experience to be optimized. Such as: in the habit of using the washing machine, the clothes are put into the washing machine, the power key is pressed to select washing parameters, the start key is pressed to start the washing machine, and the user leaves the washing site. If the drain valve leaks water or can not be opened in the washing process, in a related scheme, if the drain valve leaks water, the water is weighed and then enters the water inlet process, and water leaks outwards in the water inlet process, so that the water level sensor detects that the water level is unchanged for a long time in a period of water inlet, the washing machine reports the water inlet overtime fault, and the washing machine stops running. If the drain valve can not be opened, water can be discharged after the weighing process, the water inlet process and the washing process, and water can not be discharged in the water discharging process, so that the water level sensor detects that the water level is unchanged for a long time in the water discharging period, the washing machine reports the water discharging overtime fault, and the washing machine stops running.
When the faults occur, the user returns to home to take out clothes of the washing machine for airing, the washing machine is found to be incapable of washing clothes normally, fault removal is carried out according to fault prompts of the washing machine, and then normal washing is carried out. However, in the process from the time that the user presses the start key to wash clothes and leaves the washing site to the time that the user returns home to take clothes for airing, if the drain valve is abnormal, the user cannot wash the clothes normally, and the washing time of the user is wasted.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention aims to provide a fault detection method and device for a washing machine and the washing machine, so as to solve the problems that when a drain valve of the washing machine leaks water or cannot be opened, the drain valve is judged to be abnormal after a long period of time, the washing time is wasted, and the use experience of a user is influenced, and achieve the effect of improving the use experience of the user by shortening the detection time of the abnormal drain valve.
The invention provides a fault detection method of a washing machine, wherein the washing machine is provided with a first water inlet valve and a first water outlet valve; a second water inlet valve is arranged between the first water inlet valve and the first water discharge valve; the area between the first water inlet valve and the second water inlet valve is marked as a first water level detection area; the area between the second water inlet valve and the first water discharge valve is marked as a second water level detection area; the fault detection method of the washing machine comprises the following steps: under the condition that a power key of the washing machine is pressed, controlling the first water inlet valve and the second water inlet valve to be opened and controlling the first drain valve to be closed; detecting the water level of the first water level detection area, and recording as a first water level; detecting the water level of the second water level detection area, and recording as a second water level; determining whether there is a water intake and discharge failure of the washing machine according to at least one of the first water level and the second water level; if the water inlet and outlet faults of the washing machine exist, initiating a reminding message that the water inlet and outlet faults of the washing machine exist under the condition that a starting key of the washing machine is pressed.
In some embodiments, the malfunction of water supply and drainage of the washing machine includes: the fault of water inlet overtime of the washing machine and/or the fault of water drainage and leakage of the washing machine; determining whether there is a water inlet and outlet malfunction of the washing machine according to at least one of the first water level and the second water level, including: determining whether the first water level is greater than or equal to a first set water level; if the first water level is lower than the first set water level, determining that the washing machine has an overtime fault of water inlet; and if the first water level is greater than or equal to the first set water level, determining whether the washing machine has water drainage and leakage faults.
In some embodiments, determining whether the washing machine has a water leakage fault includes: determining whether the second water level is greater than or equal to a second set water level; if the second water level is lower than the second set water level, determining that the washing machine has a water drainage and leakage fault of water leakage of the first water drainage valve; and if the second water level is greater than or equal to the second set water level, determining that the washing machine does not have water inlet overtime faults and water drainage and leakage faults.
In some embodiments, the malfunction of the water supply and drainage of the washing machine further comprises: a water non-discharge failure of the washing machine; under the condition that the washing machine does not have water inlet overtime faults and water drainage leakage faults, controlling the first water inlet valve and the second water inlet valve to be closed and controlling the first water drainage valve to be opened; determining whether the second water level is decreased; if the second water level is reduced, determining that the first drain valve can be normally opened; and if the second water level is not reduced, determining that the first drain valve cannot be normally opened, and determining that the washing machine has a water discharge failure.
In some embodiments, initiating a warning message that the washing machine has a water inlet and outlet fault comprises: controlling a preset buzzer to start, initiating an alarm message that the washing machine has water inlet and outlet faults, and clearing the alarm message after the washing machine is shut down; and controlling a preset display to start, displaying a fault code of the washing machine with water inlet and outlet faults, and clearing the fault code after the washing machine is shut down.
In correspondence to the above method, a further aspect of the present invention provides a malfunction detection apparatus of a washing machine having a first water inlet valve and a first water discharge valve; a second water inlet valve is arranged between the first water inlet valve and the first water discharge valve; the area between the first water inlet valve and the second water inlet valve is marked as a first water level detection area; the area between the second water inlet valve and the first water discharge valve is marked as a second water level detection area; the malfunction detecting apparatus of a washing machine includes: a detection unit and a control unit; the detection unit includes: a first water level sensor and a second water level sensor; the first water level sensor is arranged in the first water level detection area; the second water level sensor is arranged in the second water level detection area; wherein the control unit is configured to control both the first water inlet valve and the second water inlet valve to be opened and the first drain valve to be closed when a power key of the washing machine is pressed; the first water level sensor is configured to detect the water level of the first water level detection area, and the detected water level is marked as a first water level; the second water level sensor is configured to detect the water level of the second water level detection area, and the detected water level is marked as a second water level; the control unit further configured to determine whether there is a water inlet and outlet malfunction of the washing machine according to at least one of the first water level and the second water level; if the water inlet and outlet faults of the washing machine exist, initiating a reminding message that the water inlet and outlet faults of the washing machine exist under the condition that a starting key of the washing machine is pressed.
In some embodiments, the malfunction of the water supply and drainage of the washing machine includes: the fault of water inlet overtime of the washing machine and/or the fault of water drainage and leakage of the washing machine; the control unit determining whether there is a water inlet and outlet malfunction of the washing machine according to at least one of the first water level and the second water level, including: determining whether the first water level is greater than or equal to a first set water level; if the first water level is lower than the first set water level, determining that the washing machine has an overtime fault of water inlet; and if the first water level is greater than or equal to the first set water level, determining whether the washing machine has a water drainage and leakage fault.
In some embodiments, the control unit determining whether there is a water leakage fault in the washing machine includes: determining whether the second water level is greater than or equal to a second set water level; if the second water level is lower than the second set water level, determining that the washing machine has a water drainage and leakage fault of water leakage of the first water drainage valve; and if the second water level is greater than or equal to the second set water level, determining that the washing machine does not have water inlet overtime faults and water drainage and leakage faults.
In some embodiments, the malfunction of the water supply and drainage of the washing machine further comprises: a water non-discharge failure of the washing machine; the control unit is also configured to control the first water inlet valve and the second water inlet valve to be closed and control the first water outlet valve to be opened under the condition that the washing machine does not have water inlet overtime faults and water outlet leakage faults; determining whether the second water level is decreased; if the second water level is reduced, determining that the first drain valve can be normally opened; and if the second water level is not reduced, determining that the first drain valve cannot be normally opened, and determining that the washing machine has a water discharge failure.
In some embodiments, the control unit, initiating a warning message that there is a water inlet and outlet failure in the washing machine, includes: controlling a preset buzzer to start, initiating an alarm message that the washing machine has water inlet and outlet faults, and clearing the alarm message after the washing machine is shut down; and controlling a preset display to start, displaying a fault code of the washing machine with water inlet and outlet faults, and clearing the fault code after the washing machine is shut down.
In accordance with the above apparatus, a further aspect of the present invention provides a washing machine, comprising: the above described malfunction detection apparatus of a washing machine.
Therefore, the proposal of the invention arranges the second water inlet valve in the water flow pipeline between the first water inlet valve and the first drain valve of the washing machine, and a first water level sensor (e.g. a first probe type water level detection sensor) is provided in a first water level detection region between the first inlet valve and the second inlet valve, a second water level sensor (e.g. a first pneumatic water level detection sensor) is provided in a second water level detection region between the second inlet valve and the first outlet valve, by controlling the first water inlet valve and the second water inlet valve and utilizing the detection results of the first water level sensor and the second water level sensor, the washing machine can judge whether the drain valve (such as the first drain valve) is abnormal when a user presses a power key, if the drain valve is abnormal, the abnormal condition of the drain valve is immediately informed to the user in a reminding mode when the user presses a start key to wash the clothes after selecting the washing parameters; therefore, the detection time of the abnormity of the drain valve can be shortened, and the use experience of a user is improved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
Fig. 1 is a schematic structural view of an embodiment of a malfunction detection apparatus of a washing machine according to the present invention;
FIG. 2 is a schematic structural diagram illustrating an embodiment of an apparatus for early detecting an abnormality of a drain valve according to the present invention;
FIG. 3 is a schematic flow chart illustrating a method for early detecting an abnormal state of a drain valve according to an embodiment of the present invention;
FIG. 4 is a schematic flowchart illustrating a method for early detection of an abnormal state of a drain valve according to another embodiment of the present invention;
FIG. 5 is a flowchart illustrating a method for detecting malfunction of a washing machine according to an embodiment of the present invention;
FIG. 6 is a schematic flow chart illustrating an embodiment of determining whether a water inlet/outlet failure exists in the washing machine according to the method of the present invention;
FIG. 7 is a flowchart illustrating an embodiment of determining whether the washing machine has a water leakage fault according to the method of the present invention;
fig. 8 is a flowchart illustrating an embodiment of determining whether the washing machine has a non-drainage fault according to the method of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the disclosed embodiments are merely exemplary of the invention, and are not intended to be exhaustive or exhaustive. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
According to an embodiment of the present invention, there is provided a malfunction detection apparatus of a washing machine. Referring to fig. 1, a schematic diagram of an embodiment of the apparatus of the present invention is shown. The washing machine has a first water inlet valve and a first water outlet valve. And a second water inlet valve is arranged between the first water inlet valve and the first water discharge valve. And the area between the first water inlet valve and the second water inlet valve is marked as a first water level detection area. And the area between the second water inlet valve and the first water discharge valve is marked as a second water level detection area.
The malfunction detecting apparatus of a washing machine includes: a detection unit and a control unit. The detection unit includes: a first water level sensor and a second water level sensor. The first water level sensor is disposed in the first water level detection region. The second water level sensor is disposed in the second water level detection region.
Wherein the control unit is configured to control both the first and second water inlet valves to be opened and the first drain valve to be closed, in case that a power key of the washing machine is pressed.
The first water level sensor is configured to detect a water level of the first water level detection area, which is marked as a first water level.
The second water level sensor is configured to detect a water level of the second water level detection area, which is noted as a second water level.
The control unit is further configured to determine whether there is a water inlet and outlet malfunction of the washing machine according to at least one of the first water level and the second water level. If the water inlet and outlet faults of the washing machine are determined, a reminding message of the water inlet and outlet faults of the washing machine is initiated under the condition that a starting key of the washing machine is pressed, and a user is reminded of processing the water inlet and outlet faults of the washing machine.
In the related scheme, when the starting key is pressed to operate the washing machine, if the drain valve leaks water, the water leaks outwards in the process from the operation of the washing machine for a period of time after the weighing process to the water inlet process, so that the water level does not change for a long time after the water inlet process for a period of time, the low water level is kept, and the washing machine reports the water inlet overtime fault.
In the relevant scheme, when the starting key is pressed to operate the washing machine, if the drain valve cannot be opened, water cannot be discharged outwards through the drain valve in the drainage process after the washing machine operates for a period of time in the washing process, so that the water level does not change for a long time in the drainage process for a period of time, the high water level is kept, and the washing machine reports the water inflow overtime fault.
In consideration of the fact that the washing machine drainage valve leaks water or cannot be opened, the washing machine can judge that the drainage valve is abnormal after a long time, and then alarm prompt is carried out. In the process of judging whether the drain valve is abnormal or not during the operation of the washing machine, a user leaves a washing site and cannot find out the faults of the washing machine in time, so that the washing time is wasted, and the experience is particularly poor. The scheme of the invention provides a scheme capable of detecting the abnormity of the drain valve in advance, the washing machine capable of automatically entering the abnormity judgment of the drain valve by pressing the power key by a user is designed, after the washing parameters are selected, when the start key is pressed for washing, the washing machine can immediately inform the user of the abnormity problem of the drain valve in an alarm prompt mode, and the user can timely check the fault according to the displayed fault code. Therefore, the problems that after the washing machine is started, a user judges whether the drain valve is abnormal in the normal water inlet process or the water drainage process of the washing machine, the processes need more time to run, the user leaves a washing site, the failure of the washing machine cannot be found in time, the washing time is wasted, and the experience feeling is very poor can be avoided. The problem of among the relevant scheme washing machine operation after a period just can judge the drain valve and leak is solved.
In some embodiments, the malfunction of the water supply and drainage of the washing machine includes: the water inlet overtime fault of the washing machine and/or the water discharge and leakage fault of the washing machine.
The control unit determining whether there is a water inlet and outlet malfunction of the washing machine according to at least one of the first water level and the second water level, including:
the control unit is specifically further configured to determine whether the first water level is greater than or equal to a first set water level.
The control unit is specifically configured to determine that the washing machine has a water inlet timeout fault if the first water level is less than the first set water level.
The control unit is specifically configured to determine whether a water leakage fault exists in the washing machine if the first water level is greater than or equal to the first set water level.
Fig. 2 is a schematic structural diagram of an embodiment of an apparatus for detecting an abnormality of a drain valve in advance according to the present invention. As shown in fig. 2, an apparatus for early detection of an abnormality of a discharge valve includes: the water level sensor comprises a faucet, a water flow pipeline, a first water inlet valve, a first probe type water level sensor, a first water discharge valve, a second water inlet valve and a first pneumatic type water level sensor.
As shown in fig. 2, in the aspect of the present invention, a water flow pipe of a washing machine has a water flow passage on which a first water inlet valve is provided, and a first probe type water level detector is provided at a first water level detection area at the first water inlet valve of the water flow pipe. A water flow channel is additionally arranged on a water flow pipeline of the washing machine, a second water inlet valve is arranged on the water flow channel, a first probe type water level sensor is arranged in a second water level detection area at the second water inlet valve of the water flow pipeline, and water flow enters the second water level detection area from the second water inlet valve in the detection process, so that the phenomenon that the water flow directly enters an inner barrel to wet clothes to influence the weighing of the clothes is avoided.
In some embodiments, the control unit determining whether there is a water leakage fault in the washing machine includes:
the control unit is specifically further configured to determine whether the second water level is greater than or equal to a second set water level.
The control unit is specifically configured to determine that a water leakage fault of water leakage from the first drain valve exists in the washing machine if the second water level is lower than the second set water level.
The control unit is specifically configured to determine that there is no water inlet timeout fault and no water discharge leakage fault in the washing machine and determine whether there is a water discharge failure fault in the washing machine if the second water level is greater than or equal to the second set water level.
Fig. 3 is a flowchart illustrating an embodiment of a method for early detecting an abnormality of a drain valve according to the present invention, and fig. 4 is a flowchart illustrating another embodiment of a method for early detecting an abnormality of a drain valve according to the present invention. As shown in fig. 3 and 4, a method of detecting an abnormality of a water discharge valve in advance, includes:
step 1, when the washing machine shown in fig. 2 is used, when a user presses a power switch key, a controller of the washing machine is powered on, and the abnormal self-detection process of a drain valve (such as a first drain valve) is automatically started.
And 2, opening the first water inlet valve and the second water inlet valve. A water flow channel for detecting the abnormity of the third water discharge valve is formed by controlling the opening of the first water inlet valve and the second water inlet valve, so that the phenomenon that the water flow directly enters clothes in a wet cylinder in the washing machine to influence the weighing of the clothes is avoided. When the first probe type water level sensor detects that water passes through the first water level detection area, the first pneumatic water level sensor detects that the water level of the second water level detection area rises rapidly to indicate that the first drain valve does not leak water, otherwise, the water level of the second water level detection area does not change to indicate that the first drain valve leaks water.
Specifically, after water enters the first water level detection area, the first probe type water level sensor can feed back water information in real time and feed back the water information to the controller through the first water level detection area, and then it is shown that water inlet is abnormal.
Because the first drain valve is closed, the water level in the second water level detection area can rise rapidly under the condition that the first drain valve is normally free from water leakage. Otherwise, if the first drainage valve leaks water, the water level at the second water level detection area is unchanged. The first pneumatic water level sensor can detect the water level change in the second water level detection area to judge whether the first drain valve leaks water or not, when the water level rises, the first drain valve does not leak water, and when the water level does not change or the variation amount is small, the first drain valve leaks water. The first air pressure type sensor can send the detection result of the water level change in the second water level detection area to the controller in real time. The controller can judge whether the second drain valve leaks water according to the result fed back by the first pneumatic sensor.
If the first drainage valve leaks water, the water leakage fault is controlled and recorded, and when a user presses a start key to operate clothes washing, the controller buzzes an alarm prompt and displays a water leakage fault code.
In some embodiments, the laundry machine further comprises: failure of the washing machine to drain water.
The control unit is also configured to control the first water inlet valve and the second water inlet valve to be closed and control the first water outlet valve to be opened under the condition that the washing machine does not have water inlet overtime faults and water outlet leakage faults.
The control unit is particularly further configured to determine whether the second water level decreases.
The control unit is specifically configured to determine that the first drain valve can be normally opened if the second water level decreases, and there is no water discharge failure of the washing machine.
The control unit is specifically configured to determine that the first drain valve cannot be normally opened and the washing machine has a water discharge failure if the second water level is not reduced.
Referring to the example shown in fig. 3 and 4, after the detection is completed, if the first drain valve has no water leakage, then step 3 is performed to determine whether the drain valve can be opened for detection. That is, after step 2, if no water leakage is found in the first drain valve, the process proceeds to step 3 to detect whether the first drain valve can be opened.
And 3, closing the first water inlet valve and the second water inlet valve, and opening the first drain valve. That is, the first and second inlet valves are controlled to be closed while the first drain valve is opened. In case that the first drain valve can be normally opened, the water level in the second water level detection region is rapidly lowered. On the contrary, when the first drain valve cannot be opened, the water level in the second water level detection area is unchanged or is changed very little, the first pneumatic water level sensor detects the water level change in the second water level detection area in real time, and the water level is unchanged or has a small change amount, so that the first drain valve is judged to be impossible to open. The controller can record whether the third drain valve is abnormal or not by judging the water level change in the second water level detection area detected by the first pneumatic water level sensor in real time.
Specifically, under the first drain valve can normally open the condition, the water in second water level detection zone department can outwards be discharged from first drain valve, and second water level detection zone department water level reduces rapidly. On the contrary, if the first drain valve cannot be opened, the water at the second water level detection region cannot be drained to the outside, and thus the water level in the second water level detection region is not changed.
The first air pressure type sensor can feed back the water level change at the second water level detection area in real time. If the water level is unchanged, the first drain valve cannot be opened, otherwise, the water level is rapidly changed and reduced, and the first drain valve can be normally opened. Therefore, the controller can judge whether the drain valve can be normally opened or not through the water level change fed back by the first pneumatic sensor, if the drain valve cannot be normally opened, the controller records the fault that the first drain valve cannot be opened, and when a user presses a start key to operate, the controller can give a buzzing prompt and display a fault code that the first drain valve cannot be opened.
According to the scheme provided by the invention, through the steps, the washing machine can be started when a user presses a power key of the washing machine, abnormal detection of a drain valve (such as a first drain valve) can be automatically carried out, when the user selects washing parameters and presses a start key to run washing, the user can be reminded to troubleshoot faults by means of buzzing alarm and display of a corresponding fault code through a display panel in time, so that the problem that the alarm can be given after the drain valve is abnormal and runs washing for a long time is avoided, the problem of poor washing experience is avoided, and the washing experience of the user can be improved.
In some embodiments, the control unit initiates a warning message that the washing machine has a water inlet and outlet fault, and the warning message includes at least one of the following:
the first reminding mode is as follows: the control unit is specifically configured to control a preset buzzer to be started, initiate an alarm message that the washing machine has a water inlet and outlet fault, and clear the alarm message after the washing machine is shut down.
The second reminding mode is as follows: the control unit is specifically configured to control a preset display to start, display a fault code that the washing machine has a water inlet and outlet fault, and clear the fault code after the washing machine is shut down.
With continuing reference to the example shown in fig. 3 and 4, in particular, a method of early detecting an abnormality of a drain valve according to the present invention, the following operations may be performed:
step a, flow preparation (system setting required):
and step a1, clearing the fault record of the abnormality of the first drain valve recorded last time.
Step a2, clear display fault code.
Step a3, detecting whether the first probe type water level sensor is faulty.
Step a4, detecting whether the first air pressure type water level sensor has a fault.
For example: in the process of starting the process preparation, the controller can detect the values fed back by the first water level sensor and the second water level sensor in real time, and if the values are higher or lower than a preset normal value range (corresponding to the lowest water level and the highest water level in actual use), the water level sensor is considered to be abnormal (the water level sensor is in fault).
Step b, executing the process:
step b1, process preparation.
And step b2, judging whether the user presses the power key.
And b3, automatically entering a detection process of whether the first drain valve is in failure.
Step b4, opening the first water inlet valve and the second water inlet valve.
And b5, judging whether the first probe type water level sensor detects that water passes through the first water level detection area (if no water passes through, the water is reported to be overtime).
And b6, judging whether the first pneumatic water level sensor detects the water level rise of the second water level detection area (if the water level does not rise, reporting that the first drain valve leaks).
Step b7, closing the first water inlet valve and the second water inlet valve.
Step b8, opening the first drain valve.
And step b9, judging whether the first pneumatic water level sensor detects the water level drop of the second water level detection area (if the water level does not drop, reporting the fault that the first drain valve cannot be opened).
And b10, completing self-checking of the first drain valve.
Step b11, the user presses the start key to operate the washing machine
And b12, buzzing and early warning.
And step b12, displaying the fault code.
And step b13, the user checks the abnormal reason of the first drain valve according to the displayed fault code.
When the method for detecting the abnormity of the drain valve in advance is executed, other different devices can be used for detecting whether the first drain valve is in an abnormal fault or not in advance, and the problem that the drain valve (such as the first drain valve) leaks water can be judged only after the washing machine operates for a period of time in related schemes can be solved.
For example: through designing an unconventional drain valve, this drain valve (be similar to current washing machine and use the lock from taking feedback signal) can feed back by oneself whether can normally open or close, thereby this feedback signal can make the controller detect this feedback signal through setting up the circuit to drain valve anomaly detection has been realized. The fault of the drain valve can be immediately judged when a user presses a start key to operate the washing machine, and the specific method for realizing the effect is more.
By adopting the technical scheme of the invention, the second water inlet valve is arranged in the water flow pipeline between the first water inlet valve and the first drain valve of the washing machine, and a first water level sensor (e.g. a first probe type water level detection sensor) is provided in a first water level detection region between the first inlet valve and the second inlet valve, a second water level sensor (e.g. a first pneumatic water level detection sensor) is provided in a second water level detection region between the second inlet valve and the first outlet valve, by controlling the first water inlet valve and the second water inlet valve and utilizing the detection results of the first water level sensor and the second water level sensor, the washing machine can judge whether the drain valve (such as the first drain valve) is abnormal when a user presses a power key, if the drain valve is abnormal, the user is immediately informed of the abnormal condition of the drain valve in a reminding mode when the user presses a start key to wash the clothes after selecting the washing parameters. Therefore, the abnormal detection time of the drain valve can be shortened, and the use experience of a user is improved.
According to an embodiment of the present invention, there is also provided a washing machine corresponding to the malfunction detection apparatus of the washing machine. The washing machine may include: the above described malfunction detection apparatus of a washing machine.
Since the processes and functions of the washing machine of this embodiment are basically corresponding to the embodiments, principles and examples of the aforementioned apparatuses, reference may be made to the related descriptions in the aforementioned embodiments for details which are not described herein in the description of this embodiment.
By adopting the technical scheme of the invention, a second water inlet valve is arranged in a water flow pipeline between a first water inlet valve and a first drain valve of the washing machine, a first water level sensor (such as a first probe type water level detection sensor) is arranged in a first water level detection area between the first water inlet valve and the second water inlet valve, a second water level sensor (such as a first pneumatic type water level detection sensor) is arranged in a second water level detection area between the second water inlet valve and the first drain valve, whether the drain valve (such as the first drain valve) is abnormal or not is judged when a user presses a power key by controlling the first water inlet valve and the second water inlet valve and utilizing detection results of the first water level sensor and the second water level sensor, if the drain valve is abnormal, the abnormal condition of the drain valve is immediately informed to the user in a reminding mode when the user presses a start key to wash after selecting washing parameters, the washing machine can be used by a user conveniently, and the safe use of the washing machine can be ensured.
According to an embodiment of the present invention, there is also provided a fault detection method of a washing machine corresponding to the washing machine, as shown in fig. 5, which is a schematic flow chart of an embodiment of the method of the present invention. The washing machine has a first water inlet valve and a first water outlet valve. And a second water inlet valve is arranged between the first water inlet valve and the first water discharge valve. And the area between the first water inlet valve and the second water inlet valve is marked as a first water level detection area. And the area between the second water inlet valve and the first water discharge valve is marked as a second water level detection area.
The fault detection method of the washing machine comprises the following steps: step S110 to step S140.
At step S110, in case that a power key of the washing machine is pressed, controlling both the first and second water inlet valves to be opened and controlling the first drain valve to be closed.
At step S120, a water level of the first water level detection area is detected, which is recorded as a first water level.
At step S130, the water level of the second water level detection area is detected, and is recorded as a second water level.
At step S140, it is determined whether there is a water intake and discharge malfunction of the washing machine according to at least one of the first water level and the second water level. If the water inlet and outlet faults of the washing machine are determined, under the condition that a starting key of the washing machine is pressed, a reminding message of the water inlet and outlet faults of the washing machine is initiated, and a user is reminded of processing the water inlet and outlet faults of the washing machine.
In the related scheme, when the starting key is pressed to operate the washing machine, if the drain valve leaks water, the water leaks outwards in the process from the operation of the washing machine for a period of time after the weighing process to the water inlet process, so that the water level does not change for a long time after the water inlet process for a period of time, the low water level is kept, and the washing machine reports the water inlet overtime fault.
In the relevant scheme, when the starting key is pressed down to operate the washing machine, if the drain valve cannot be opened, water cannot be discharged outwards through the drain valve in the process of draining after the washing machine operates for a period of time in the washing process, so that the water level does not change for a long time in the draining period, the high water level is kept, and the washing machine reports the water inlet overtime fault.
Considering that the washing machine can judge the abnormal state of the drain valve only after a long time because the drain valve of the washing machine leaks water or can not be opened, and then alarm prompt is carried out. In the process of judging whether the drain valve is abnormal or not in the operation of the washing machine, a user leaves a washing site and cannot find out the faults of the washing machine in time, so that the washing time is wasted, and the experience feeling is very poor. The scheme of the invention provides a scheme capable of detecting the abnormity of the drain valve in advance, the washing machine capable of automatically entering the abnormity judgment of the drain valve by pressing the power key by a user is designed, after the washing parameters are selected, when the start key is pressed for washing, the washing machine can immediately inform the user of the abnormity problem of the drain valve in an alarm prompt mode, and the user can timely check the fault according to the displayed fault code. Therefore, the problems that after the washing machine is started, a user judges whether the drain valve is abnormal in the normal water inlet process or the water drainage process of the washing machine, the processes need more time to run, the user leaves a washing site, the failure of the washing machine cannot be found in time, the washing time is wasted, and the experience sense is very poor can be solved. The problem of among the relevant scheme washing machine operation after a period just can judge the drain valve and leak is solved.
In some embodiments, the malfunction of the water supply and drainage of the washing machine includes: the water inlet overtime fault of the washing machine and/or the water discharge and leakage fault of the washing machine.
A specific process of determining whether there is a malfunction of water intake and drainage of the washing machine according to at least one of the first water level and the second water level in step S140, see the following exemplary description.
The following further describes a specific process of determining whether the washing machine has water inlet and water outlet faults in step S140, with reference to a flowchart of an embodiment of determining whether the washing machine has water inlet and water outlet faults in the method of the present invention shown in fig. 6, including: step S210 to step S230.
Step S210, determining whether the first water level is greater than or equal to a first set water level.
Step S220, if the first water level is lower than the first set water level, it is determined that the washing machine has an intake overtime fault.
In step S230, if the first water level is greater than or equal to the first set water level, it is determined whether there is a water leakage fault in the washing machine.
Fig. 2 is a schematic structural diagram of a method for detecting an abnormality of a drain valve in advance according to an embodiment of the present invention. As shown in fig. 2, a method of detecting an abnormality of a discharge valve in advance, includes: the water level sensor comprises a faucet, a water flow pipeline, a first water inlet valve, a first probe type water level sensor, a first water discharge valve, a second water inlet valve and a first pneumatic type water level sensor.
As shown in fig. 2, in the aspect of the present invention, a water flow pipe of a washing machine has a water flow passage on which a first water inlet valve is provided, and a first probe type water level detector is provided at a first water level detection area at the first water inlet valve of the water flow pipe. A water flow channel is additionally arranged on a water flow pipeline of the washing machine, a second water inlet valve is arranged on the water flow channel, a first probe type water level sensor is arranged in a second water level detection area at the second water inlet valve of the water flow pipeline, and water flow enters the second water level detection area from the second water inlet valve in the detection process, so that the phenomenon that the water flow directly enters an inner barrel to wet clothes to influence the weighing of the clothes is avoided.
In some embodiments, the specific process of determining whether the washing machine has the water leakage fault in step S230 is further described with reference to a flowchart of an example of determining whether the washing machine has the water leakage fault in the method of the present invention shown in fig. 7, including: step S310 to step S330.
Step S310, determining whether the second water level is greater than or equal to a second set water level.
Step S320, if the second water level is lower than the second set water level, determining that the washing machine has a water leakage fault of water leakage from the first drain valve.
Step S330, if the second water level is greater than or equal to the second set water level, determining that the washing machine has no water inlet overtime fault and water drainage leakage fault, and determining whether the washing machine has a water drainage failure fault.
Fig. 3 is a flowchart illustrating an embodiment of a method for early detecting an abnormality of a drain valve according to the present invention, and fig. 4 is a flowchart illustrating another embodiment of a method for early detecting an abnormality of a drain valve according to the present invention. As shown in fig. 3 and 4, a method of detecting an abnormality of a water discharge valve in advance, includes:
step 1, when the washing machine shown in fig. 2 is used, when a user presses a power switch key, a controller of the washing machine is powered on, and the abnormal self-detection process of a drain valve (such as a first drain valve) is automatically started.
And 2, opening the first water inlet valve and the second water inlet valve. The first water inlet valve and the second water inlet valve are controlled to be opened to form a water flow channel for detecting the abnormality of the third water discharge valve, so that the phenomenon that the water flow directly enters the washing machine to wet clothes in the cylinder to influence the weighing of the clothes is avoided. When the first probe type water level sensor detects that water passes through the first water level detection area, the first pneumatic water level sensor detects that the water level of the second water level detection area rises rapidly to indicate that the first drain valve does not leak water, otherwise, the water level of the second water level detection area does not change to indicate that the first drain valve leaks water.
Specifically, after water enters the first water level detection area, the first probe type water level sensor can feed back water information in real time and feed back the water information to the controller through the first water level detection area, and then it is shown that water inlet is abnormal.
Because the first drain valve is closed, the water level in the second water level detection area can rise rapidly under the condition that the first drain valve is normally free from water leakage. Otherwise, if the first drainage valve leaks water, the water level at the second water level detection area is unchanged. The first pneumatic water level sensor can detect the water level change in the second water level detection area to judge whether the first drain valve leaks water or not, when the water level rises, the first drain valve does not leak water, and when the water level does not change or the variation amount is small, the first drain valve leaks water. The first air pressure type sensor can send the detection result of the water level change in the second water level detection area to the controller in real time. The controller can judge whether the second drain valve leaks water according to the result fed back by the first pneumatic sensor.
If the first drainage valve leaks water, the water leakage fault is controlled and recorded, and when a user presses a start key to operate clothes washing, the controller buzzes an alarm prompt and displays a water leakage fault code.
In some embodiments, the malfunction of the water supply and drainage of the washing machine further comprises: failure of the washing machine to drain water. The failure detection method of the washing machine further comprises the following steps: determining whether there is a water discharge failure of the washing machine.
In the following, with reference to the flow diagram of an embodiment of determining whether the washing machine has the water discharge incapability fault in the method of the present invention shown in fig. 8, a specific process of determining whether the washing machine has the water discharge incapability fault is further defined, which includes: step S410 to step S440.
And S410, controlling the first water inlet valve and the second water inlet valve to be closed and controlling the first water outlet valve to be opened under the condition that the washing machine does not have water inlet overtime faults and water drainage leakage faults.
Step S420, determining whether the second water level decreases.
And step S430, if the second water level is reduced, determining that the first drain valve can be normally opened, and the failure of draining the water of the washing machine does not exist.
Step S440, if the second water level is not reduced, it is determined that the first drain valve cannot be opened normally, and the washing machine has a failure in draining water.
Referring to the example shown in fig. 3 and 4, after the detection is completed, if the first drain valve has no water leakage, then step 3 is performed to determine whether the drain valve can be opened for detection. That is, after step 2, if no water leakage is found in the first drain valve, step 3 is performed to detect whether the first drain valve can be opened.
And 3, closing the first water inlet valve and the second water inlet valve, and opening the first drain valve. That is, the first and second inlet valves are controlled to be closed while the first drain valve is opened. In case that the first drain valve can be normally opened, the water level in the second water level detection region rapidly drops. On the contrary, when the first drain valve cannot be opened, the water level in the second water level detection area is unchanged or is changed very little, the first pneumatic water level sensor detects the water level change in the second water level detection area in real time, and the water level is unchanged or has a small change amount, so that the first drain valve is judged to be impossible to open. The controller can record whether the third drain valve is abnormal or not by judging the water level change in the second water level detection area detected by the first pneumatic water level sensor in real time.
Specifically, under the condition that first drain valve can normally be opened, the water in second water level detection zone department can outwards be discharged from first drain valve, and second water level detection zone department water level reduces rapidly. On the contrary, if the first drain valve cannot be opened, the water at the second water level detection region cannot be drained to the outside, and thus the water level in the second water level detection region is not changed.
The first air pressure type sensor can feed back the water level change at the second water level detection area in real time. If the water level does not change, the first drain valve cannot be opened, otherwise, the water level rapidly changes and drops, and the first drain valve can be normally opened. Therefore, the controller can judge whether the drain valve can be normally opened or not through the water level change fed back by the first pneumatic sensor, if the drain valve cannot be normally opened, the controller records the fault that the first drain valve cannot be opened, and when a user presses a start key to operate, the controller can give a buzzing prompt and display a fault code that the first drain valve cannot be opened.
According to the scheme provided by the invention, through the steps, the washing machine can be started when a user presses a power key of the washing machine, abnormal detection of a drain valve (such as a first drain valve) can be automatically carried out, when the user selects washing parameters and presses a start key to run washing, the user can be reminded to troubleshoot faults by means of buzzing alarm and display of a corresponding fault code through a display panel in time, so that the problem that the alarm can be given after the drain valve is abnormal and runs washing for a long time is avoided, the problem of poor washing experience is avoided, and the washing experience of the user can be improved.
11. The fault detection method of the washing machine as claimed in any one of claims 7 to 10, wherein the method for initiating the warning message that the water inlet and outlet faults exist in the washing machine comprises at least one of the following warning modes:
the first reminding mode is as follows: controlling a preset buzzer to start, initiating an alarm message that the washing machine has water inlet and outlet faults, and clearing the alarm message after the washing machine is shut down.
The second reminding mode comprises the following steps: and controlling a preset display to start, displaying a fault code of the washing machine with water inlet and outlet faults, and clearing the fault code after the washing machine is shut down.
With continuing reference to the example shown in fig. 3 and 4, in particular, a method of early detecting an abnormality of a drain valve according to the present invention, the following operations may be performed:
step a, flow preparation (system setting required):
and step a1, clearing the fault record of the first drain valve abnormity recorded last time.
Step a2, clearing the display fault code.
Step a3, detecting whether the first probe type water level sensor is faulty.
Step a4, detecting whether the first air pressure type water level sensor has a fault.
Step b, executing the flow:
step b1, process preparation.
And step b2, judging whether the user presses the power key.
And b3, automatically entering a detection process of whether the first drain valve is in failure.
Step b4, opening the first water inlet valve and the second water inlet valve.
And b5, judging whether the first probe type water level sensor detects that water passes through the first water level detection area (if no water passes through, the water is reported to be overtime).
And b6, judging whether the first pneumatic water level sensor detects the water level rise of the second water level detection area (if the water level does not rise, reporting that the first drain valve leaks).
Step b7, closing the first water inlet valve and the second water inlet valve.
Step b8, opening the first drain valve.
And b9, judging whether the first pneumatic water level sensor detects the water level drop of the second water level detection area (if the water level does not drop, reporting the fault that the first drain valve cannot be opened).
And b10, completing self-checking of the first drain valve.
Step b11, the user presses the start key to operate the washing machine
And b12, buzzing and early warning.
And step b12, displaying the fault code.
And step b13, the user checks the abnormal reason of the first drain valve according to the displayed fault code.
When the method for detecting the abnormity of the drain valve in advance is executed, other different methods can be used for detecting whether the first drain valve is in an abnormal fault or not in advance, and the problem that the drain valve (such as the first drain valve) leaks water can be judged only after the washing machine operates for a period in the related scheme can be solved.
Since the processes and functions implemented by the method of the present embodiment substantially correspond to the embodiments, principles and examples of the washing machine, reference may be made to the related descriptions in the foregoing embodiments without being detailed in the description of the present embodiment.
By adopting the technical scheme of the embodiment, the second water inlet valve is arranged in a water flow pipeline between the first water inlet valve and the first drain valve of the washing machine, the first water level sensor (such as a first probe type water level detection sensor) is arranged in the first water level detection area between the first water inlet valve and the second water inlet valve, the second water level sensor (such as a first pneumatic type water level detection sensor) is arranged in the second water level detection area between the second water inlet valve and the first drain valve, whether the drain valve (such as the first drain valve) is abnormal or not is judged when a user presses a power key through controlling the first water inlet valve and the second water inlet valve and utilizing the detection results of the first water level sensor and the second water level sensor, if the drain valve is abnormal, the abnormal condition of the drain valve is immediately informed to the user in a reminding manner when the user presses a start key to wash after selecting washing parameters, reliable and timely.
In summary, it is readily understood by those skilled in the art that the advantageous modes described above can be freely combined and superimposed without conflict.
The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (10)

1. A fault detection method of a washing machine is characterized in that the washing machine is provided with a first water inlet valve and a first water outlet valve; a second water inlet valve is arranged between the first water inlet valve and the first water discharge valve; the area between the first water inlet valve and the second water inlet valve is marked as a first water level detection area; the area between the second water inlet valve and the first water discharge valve is marked as a second water level detection area;
the washing machine comprises a water flow pipeline, a water inlet valve, a water outlet valve and a water inlet valve, wherein the water flow pipeline of the washing machine is provided with a water flow channel, and the first water inlet valve is arranged on the water flow channel; a water flow channel is added on a water flow pipeline of the washing machine, and a second water inlet valve is arranged on the water flow channel; arranging a second water inlet valve in a water flow pipeline between a first water inlet valve and a first water discharge valve of the washing machine;
the fault detection method of the washing machine comprises the following steps:
under the condition that a power key of the washing machine is pressed, controlling the first water inlet valve and the second water inlet valve to be opened and controlling the first drain valve to be closed;
detecting the water level of the first water level detection area, and recording as a first water level;
detecting the water level of the second water level detection area, and recording as a second water level;
determining whether there is a water intake and discharge failure of the washing machine according to at least one of the first water level and the second water level; if the water inlet and outlet faults of the washing machine exist, initiating a reminding message that the water inlet and outlet faults of the washing machine exist under the condition that a starting key of the washing machine is pressed.
2. The malfunction detection method of a washing machine according to claim 1, wherein the malfunction of water supply and drainage of the washing machine comprises: the fault of water inlet overtime of the washing machine and/or the fault of water drainage and leakage of the washing machine;
determining whether there is a water inlet and discharge failure of the washing machine according to at least one of the first water level and the second water level, including:
determining whether the first water level is greater than or equal to a first set water level;
if the first water level is lower than the first set water level, determining that the washing machine has an overtime fault of water inlet;
and if the first water level is greater than or equal to the first set water level, determining whether the washing machine has a water drainage and leakage fault.
3. The malfunction detection method of a washing machine according to claim 2, wherein determining whether the washing machine has a water leakage malfunction includes:
determining whether the second water level is greater than or equal to a second set water level;
if the second water level is lower than the second set water level, determining that the washing machine has a water drainage and leakage fault of water leakage of the first water drainage valve;
and if the second water level is greater than or equal to the second set water level, determining that the washing machine does not have water inlet overtime faults and water drainage and leakage faults.
4. The malfunction detection method of a washing machine according to claim 3, wherein the malfunction of water supply and drainage of the washing machine further comprises: a water non-discharge failure of the washing machine;
under the condition that the washing machine does not have water inlet overtime faults and water drainage leakage faults, controlling the first water inlet valve and the second water inlet valve to be closed and controlling the first water drainage valve to be opened;
determining whether the second water level is decreased;
if the second water level is reduced, determining that the first drain valve can be normally opened;
and if the second water level is not reduced, determining that the first drain valve cannot be normally opened, and determining that the washing machine has a water discharge failure.
5. The fault detection method of a washing machine according to any one of claims 1 to 4, wherein initiating a warning message that there is a water inlet and outlet fault in the washing machine comprises:
controlling a preset buzzer to start, initiating an alarm message that the washing machine has water inlet and outlet faults, and clearing the alarm message after the washing machine is shut down;
and controlling a preset display to start, displaying a fault code of the washing machine with water inlet and outlet faults, and clearing the fault code after the washing machine is shut down.
6. A fault detection device of a washing machine is characterized in that the washing machine is provided with a first water inlet valve and a first water outlet valve; a second water inlet valve is arranged between the first water inlet valve and the first water discharge valve; the area between the first water inlet valve and the second water inlet valve is marked as a first water level detection area; the area between the second water inlet valve and the first water discharge valve is marked as a second water level detection area;
the washing machine comprises a water flow pipeline, a water inlet valve, a water outlet valve and a water inlet valve, wherein the water flow pipeline of the washing machine is provided with a water flow channel, and the first water inlet valve is arranged on the water flow channel; a water flow channel is added on a water flow pipeline of the washing machine, and a second water inlet valve is arranged on the water flow channel; arranging a second water inlet valve in a water flow pipeline between a first water inlet valve and a first water discharge valve of the washing machine;
the malfunction detecting apparatus of a washing machine includes: a detection unit and a control unit; the detection unit includes: a first water level sensor and a second water level sensor; the first water level sensor is arranged in the first water level detection area; the second water level sensor is arranged in the second water level detection area; wherein,
the control unit is configured to control the first water inlet valve and the second water inlet valve to be opened and control the first drain valve to be closed when a power key of the washing machine is pressed;
the first water level sensor is configured to detect the water level of the first water level detection area, and the detected water level is marked as a first water level;
the second water level sensor is configured to detect the water level of the second water level detection area, and the detected water level is marked as a second water level;
the control unit further configured to determine whether there is a water inlet and outlet malfunction of the washing machine according to at least one of the first water level and the second water level; if the water inlet and outlet faults of the washing machine exist, initiating a reminding message that the water inlet and outlet faults of the washing machine exist under the condition that a starting key of the washing machine is pressed.
7. The malfunction detection device of a washing machine according to claim 6, wherein the malfunction of water supply and drainage of the washing machine comprises: the fault of water inlet overtime of the washing machine and/or the fault of water drainage and leakage of the washing machine;
the control unit determining whether there is a water inlet and outlet malfunction of the washing machine according to at least one of the first water level and the second water level, including:
determining whether the first water level is greater than or equal to a first set water level;
if the first water level is lower than the first set water level, determining that the washing machine has water inlet overtime fault;
and if the first water level is greater than or equal to the first set water level, determining whether the washing machine has a water drainage and leakage fault.
8. The malfunction detection apparatus of a washing machine according to claim 7, wherein,
the control unit, determining whether there is a water leakage fault in the washing machine, includes:
determining whether the second water level is greater than or equal to a second set water level;
if the second water level is lower than the second set water level, determining that the washing machine has a water drainage and leakage fault of water leakage of the first water drainage valve;
if the second water level is greater than or equal to the second set water level, determining that the washing machine does not have water inlet overtime faults and water drainage and leakage faults;
and/or the presence of a gas in the gas,
the control unit initiates a reminding message that the washing machine has water inlet and outlet faults, and comprises:
controlling a preset buzzer to start, initiating an alarm message that the washing machine has water inlet and outlet faults, and clearing the alarm message after the washing machine is shut down;
and controlling a preset display to start, displaying a fault code of the washing machine with water inlet and outlet faults, and clearing the fault code after the washing machine is shut down.
9. The malfunction detection apparatus of a washing machine according to claim 8, wherein the water supply and drainage malfunction of the washing machine further comprises: a water non-discharge failure of the washing machine;
the control unit is also configured to control the first water inlet valve and the second water inlet valve to be closed and control the first water discharge valve to be opened under the condition that the washing machine does not have water inlet overtime faults and water discharge leakage faults;
determining whether the second water level is decreased;
if the second water level is reduced, determining that the first drain valve can be normally opened;
and if the second water level is not reduced, determining that the first drain valve cannot be normally opened, and determining that the washing machine has a water discharge failure.
10. A washing machine, characterized by comprising: the malfunction detection apparatus of a washing machine as claimed in any one of claims 6 to 9.
CN202111397578.1A 2021-11-23 2021-11-23 Fault detection method and device for washing machine and washing machine Active CN114016255B (en)

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DE19505414C2 (en) * 1995-02-17 1998-08-27 Miele & Cie Method for detecting an error in the water inlet or water outlet of a program-controlled washing machine or dishwasher
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CN104727099B (en) * 2013-12-24 2019-02-19 青岛海尔洗衣机有限公司 A kind of control method of automatic dispensing additive
JP2018075180A (en) * 2016-11-09 2018-05-17 東芝ライフスタイル株式会社 Washing machine
CN112971660A (en) * 2019-12-12 2021-06-18 青岛海尔洗碗机有限公司 Water level detection method and dish washing machine
CN113143140B (en) * 2020-01-07 2022-07-26 宁波方太厨具有限公司 Control method of dish washing machine
CN112220423B (en) * 2020-09-29 2022-03-18 宁波方太厨具有限公司 Dish washing machine water inlet control method and dish washing machine

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