CN113897764B - Upper drain washing machine and drain control method thereof - Google Patents
Upper drain washing machine and drain control method thereof Download PDFInfo
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- CN113897764B CN113897764B CN202010575883.4A CN202010575883A CN113897764B CN 113897764 B CN113897764 B CN 113897764B CN 202010575883 A CN202010575883 A CN 202010575883A CN 113897764 B CN113897764 B CN 113897764B
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- 238000005406 washing Methods 0.000 title claims abstract description 111
- 238000000034 method Methods 0.000 title claims abstract description 101
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 245
- 101150055297 SET1 gene Proteins 0.000 claims abstract description 21
- 101150117538 Set2 gene Proteins 0.000 claims description 8
- 230000007547 defect Effects 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
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Classifications
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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
- D06F33/32—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry
- D06F33/42—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of draining
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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
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/18—Washing liquid level
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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
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/08—Draining of washing liquids
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- 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
Abstract
The application relates to the technical field of washing machines, in particular to an upper drainage washing machine and a drainage control method thereof, which aim to automatically judge whether a siphon phenomenon occurs on the premise that a user stop instruction is received by the upper drainage washing machine in a normal washing process. The method includes stopping the washing; starting drainage; judging whether a condition for stopping drainage is met; if yes, stopping draining; determining a maximum water level value lw of a tub of the upper drain washing machine in a first period a max And a minimum water level value lw min A first water level difference Deltalw between 1 The method comprises the steps of carrying out a first treatment on the surface of the Judging the first water level difference Deltalw 1 Whether or not it is greater than a preset first water head difference threshold Deltalw set1 The method comprises the steps of carrying out a first treatment on the surface of the And determining whether the siphoning phenomenon occurs or not according to the judging result and executing corresponding control operation. The water draining control method can automatically judge whether the upper water draining washing machine has a siphonage phenomenon and execute corresponding control operation on the premise that a user stop instruction is received in the normal washing process, and overcomes the defects in the prior art.
Description
Technical Field
The application belongs to the technical field of washing machines, and particularly provides an upper drainage washing machine and a drainage control method thereof.
Background
Depending on the drainage mode, the washing machine generally includes an upper drainage washing machine and a lower drainage washing machine, and in comparison, the upper drainage washing machine has low requirements for installation environment, and thus is widely favored by users.
However, in some special cases during the actual use of the user, for example, in the normal washing process of the water-up and water-down washing machine, when the user wants to add laundry into the washing machine or take out a part of the laundry from the washing machine, the user needs to pause the washing and unlock the door so that the user can perform the corresponding operation. In this case, in order to prevent the water in the tub from flowing out of the door when the user opens the door, it is necessary to start the drain before unlocking the door to drain the water in the tub. Since the washing machine continues to wash after the user completes the operation, it is not desirable to completely drain the water in the tub, and a minimum allowable water level value is preset for the controller of the washing machine, and the draining is stopped when the water level in the tub reaches the minimum allowable water level value.
In the draining process, if the installation of the washing machine is not standardized, and the drain pipe orifice of the drain pipe is lower than the height of the minimum allowable water level value in the water bucket, negative pressure can be formed in the drain pipe due to the pressure difference between the inside and the outside of the drain pipe, and a siphon phenomenon is generated. Under the action of siphonage, the water in the water holding barrel can be completely emptied, and at the same time, the controller knows that the water level in the water holding barrel is smaller than the minimum allowable water level value, and then water starts to be fed, so that the phenomenon that the washing machine is fed and discharged simultaneously is generated, and the washing machine cannot work normally.
Therefore, how to automatically determine whether the upper drain washing machine has a siphon phenomenon is a technical problem that a person skilled in the art needs to solve.
Disclosure of Invention
In order to automatically judge whether the upper drainage washing machine has a siphonage phenomenon or not under the premise that a user stop command is received in a normal washing process, the application provides a drainage control method of the upper drainage washing machine.
The water draining control method of the upper water draining washing machine is used for being implemented on the premise of receiving a user stop command in the normal washing process, and comprises the following steps: stopping washing; starting drainage; judging whether a condition for stopping drainage is met; if yes, stopping draining; determining a first period of time aMaximum water level value lw of water containing barrel of upper drainage washing machine max And a minimum water level value lw min A first water level difference Deltalw between 1 The method comprises the steps of carrying out a first treatment on the surface of the Judging the first water level difference Deltalw 1 Whether or not it is greater than a preset first water head difference threshold Deltalw set1 The method comprises the steps of carrying out a first treatment on the surface of the And determining whether the siphoning phenomenon occurs or not according to the judging result and executing corresponding control operation.
In a preferred embodiment of the above-mentioned drainage control method of the present application, the step of determining whether the siphon phenomenon occurs according to the determination result includes: if the first water level difference Deltalw 1 is larger than a preset first water level difference threshold Deltalw set1 It is determined that the siphon phenomenon occurs, otherwise it is determined that the siphon phenomenon does not occur.
In a preferred embodiment of the above-mentioned water drain control method of the present application, the maximum water level value lw of the tub of the upper drain washing machine in the first period a is determined max And a minimum water level value lw min A first water level difference Deltalw between 1 The method specifically comprises the following steps: determining the maximum water level value lw of the water containing barrels of the upper drainage washing machine in the n groups in the first period a max And a minimum water level value lw min A first water level difference Deltalw between 1 N is more than or equal to 2; "judge the first water level difference Deltalw 1 Whether or not it is greater than a preset first water head difference threshold Deltalw set1 The method specifically comprises the following steps: judging the first water level difference Deltalw of each group 1 Whether or not it is greater than a preset first water head difference threshold Deltalw set1 。
In a preferred embodiment of the above-mentioned water drain control method of the present application, the maximum water level value lw of the tub of the upper drain washing machine in the first period a is determined max And a minimum water level value lw min A first water level difference Deltalw between 1 The method specifically comprises the following steps: determining a maximum water level value lw of a water tub of the upper drain washing machine in a first period a after a second period m max And a minimum water level value lw min A first water level difference Deltalw between 1 。
In a preferred embodiment of the above-mentioned water discharge control method of the present application, the "determination of the second period m is followed by the first period aMaximum water level value lw of water holding barrel of upper drainage washing machine max And a minimum water level value lw min A first water level difference Deltalw between 1 The method specifically comprises the following steps: determining the maximum water level value lw of the water containing barrels of the upper drainage washing machine in the first time period a after the second time period m max And a minimum water level value lw min A first water level difference Deltalw between 1 N is more than or equal to 2; "judge the first water level difference Deltalw 1 Whether or not it is greater than a preset first water head difference threshold Deltalw set1 The method specifically comprises the following steps: judging the first water level difference Deltalw of each group 1 Whether or not it is greater than a preset first water head difference threshold Deltalw set1 。
In a preferred embodiment of the above-described drainage control method of the present application, after the step of "stopping washing", and before the step of "starting drainage", the drainage control method further includes: acquiring a first water level value lw of the water containing bucket 1 The method comprises the steps of carrying out a first treatment on the surface of the In the case where "it is determined that the siphon phenomenon occurs," the step of "executing the corresponding control operation" includes: draining the water in the water containing barrel, and then feeding water to the first water level value lw 1 The water supply was stopped and the washing was restarted.
In a preferred embodiment of the above-described drainage control method of the present application, in the case where "it is determined that no siphon phenomenon occurs," the step of "executing the corresponding control operation" includes: the washing was started by re-washing.
In a preferred embodiment of the above-described drainage control method of the present application, the step of "judging whether the condition for stopping drainage is satisfied" includes: acquiring a second water level value lw of the water containing bucket 2 The method comprises the steps of carrying out a first treatment on the surface of the Judging the second water level value lw 2 Whether is smaller than or equal to a preset drainage stopping target water level value lw tv The method comprises the steps of carrying out a first treatment on the surface of the If yes, determining that the condition for stopping draining is met, otherwise, returning to acquire a second water level value lw of the water containing barrel 2 "step.
In a preferred embodiment of the above-described drainage control method of the present application, the step of "judging whether the condition for stopping drainage is satisfied" includes: acquiring a second water level value lw in the water bucket 2 The method comprises the steps of carrying out a first treatment on the surface of the Determining the second water level value lw 2 And the drainage stopping target water level value lw tv A second water level difference Deltalw between 2 The method comprises the steps of carrying out a first treatment on the surface of the Judging the second water level difference Deltalw 2 Whether is smaller than or equal to a preset first water level difference threshold DeltaIw set2 The method comprises the steps of carrying out a first treatment on the surface of the If yes, determining that the condition for stopping draining is met, otherwise, returning to acquire a second water level value lw of the second water bucket 2 "step.
In a preferred embodiment of the above water drainage control method of the present application, the value range of the second period m is 5 seconds to 12 seconds, and/or the value range of the first period a is 5 seconds to 12 seconds.
The water draining control method of the application is started to be implemented on the premise that the washing machine receives a user stop command in the normal washing process, and comprises the following steps: stopping washing; starting drainage; judging whether a condition for stopping drainage is met; if yes, stopping draining; determining a maximum water level value lw of a tub of the upper drain washing machine in a first period a max And a minimum water level value lw min A first water level difference Deltalw between 1 The method comprises the steps of carrying out a first treatment on the surface of the Judging the first water level difference Deltalw 1 Whether or not it is greater than a preset first water head difference threshold Deltalw set1 The method comprises the steps of carrying out a first treatment on the surface of the And determining whether a siphon phenomenon occurs according to the determination result and executing a corresponding control operation.
The water draining control method can automatically judge whether the upper water draining washing machine has a siphonage phenomenon and execute corresponding control operation on the premise that a user stop instruction is received in the normal washing process, and overcomes the defects in the prior art.
Drawings
FIG. 1 is a flow chart of steps of a first embodiment of a drain control method of the present application;
FIG. 2 is a flow chart of steps of a second embodiment of a drain control method of the present application;
FIG. 3 is a flow chart of steps of a third embodiment of a drain control method of the present application;
FIG. 4 is a flow chart of steps of a fourth embodiment of a drain control method of the present application;
FIG. 5 is a flow chart of steps of a fifth embodiment of a drain control method of the present application;
FIG. 6 is a flow chart of steps of a sixth embodiment of a drain control method of the present application;
fig. 7 is a flowchart showing steps of a seventh embodiment of the drainage control method of the present application.
Detailed Description
Preferred embodiments of the present application are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present application, and are not intended to limit the scope of the present application.
In the description of the present application, a "controller" may include hardware, software, or a combination of both. A module may comprise hardware circuitry, various suitable sensors, communication ports, memory, or software components, such as program code, or a combination of software and hardware. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
It should be noted that the drainage control method of the present application is implemented on the premise that the user stop command is received in the normal washing process of the water-up and drainage washing machine. In a normal washing process of a washing machine, a user needs to add clothes to be washed into the washing machine or take out some clothes being washed from the washing machine in the middle, in which case the user usually sends a stop command to a controller of the washing machine by using a stop washing button on a control panel, and the controller starts the water discharge control method provided by the application after receiving the stop command.
Referring to fig. 1, the drainage control method of the present application in a first embodiment includes the main steps of:
s100, stopping washing.
It should be noted that, after receiving the shutdown command, the controller stops washing, and at this time, the controller may completely exit the washing process and directly return to the initial state of the washing machine, or may store the ongoing washing mode and washing time before shutdown.
S200, starting drainage.
The controller controls the drain pump of the upper drain washing machine to start draining.
S300, judging whether the condition of stopping drainage is met.
If so, the process proceeds to step S400, otherwise, the process returns to step S300 to continue to determine whether the condition for stopping drainage is satisfied.
S400, stopping draining.
S500, determining a maximum water level value lw of the water bucket in the first period a max And a minimum water level value lw min A first water level difference Deltalw between 1 。
It should be noted that, the specific value of the first period a depends on factors such as the power of the water-up and water-down washing machine, the washing mode, etc., and experiments prove that, for the current household common washing machine, the value range of the first period a can be between 5 seconds and 12 seconds, and further, the first water level difference Deltalw is determined when a=10 seconds 1 Preferably. In addition, a maximum water level value lw in the tub max And a minimum water level value lw min The water level sensor arranged in the water holding barrel is used for acquiring, the result is transmitted to the controller in a wired or wireless communication mode, and the controller calculates the difference value of the two modes to determine the first water level difference value Deltalw 1 。
S600, judging the first water level difference Deltalw 1 Whether or not it is greater than a preset first water head difference threshold Deltalw set1 。
Wherein the first water level difference threshold Deltalw set1 The method is characterized by comprising the step of allowing a preset water level sensor to detect a deviation value, and aims to compensate the influence of external factors such as water flow shaking and the like on the detection accuracy of the water level sensor. A first water level difference threshold Deltalw set1 The specific value of (2) depends on the structure, working principle and other factors of the water level sensor, and can be determined by the skilled person according to the actual situation of the water level sensor when the first water level difference threshold Deltalw set1 The detection value of the water level sensor is equal to zero and is an ideal value.
And S700, determining whether the siphoning phenomenon occurs or not according to the judging result and executing corresponding control operation.
The water draining control method can automatically judge whether the upper water draining washing machine has a siphonage phenomenon and execute corresponding control operation on the premise that a user stop instruction is received in the normal washing process, and overcomes the defects in the prior art.
Referring specifically to fig. 2, the "determining whether a siphon phenomenon occurs according to the determination result" in step S700 specifically includes the steps of: if it is (first water level difference Deltalw) 1 Is larger than a preset first water level difference threshold Deltalw set1 ) Step S701 is performed, if not (first water level difference Δlw 1 Less than or equal to a preset first water head threshold Deltalw set1 ) Step S702 is entered.
And S701, determining that the siphoning phenomenon occurs.
And S703, determining that no siphoning phenomenon occurs.
And executing corresponding control operation after determining whether the siphon phenomenon occurs. The corresponding control operations referred to herein may be: when the siphonage is determined to occur, the controller can send out an explicit alarm to the user to prompt the user that the washing machine is not normally installed, and the user can adopt different processing modes according to actual conditions. The method can also be as follows: the user can reinstall the washing machine to meet the requirement of the installation standard, and the user can completely exit the existing washing mode, reset the control mode of the washing machine to be in an initial state, select the washing mode, the washing time and the like to restart washing.
Of course, in order to further improve the intelligentization level of the upper drain washing machine, the drain control method of the present application may further provide subsequent steps to automatically drain the fault, and the detailed description will be continued with reference to the step flow chart of the second embodiment of the drain control method of the present application in fig. 2. In the second embodiment, an automatic treatment scheme is provided for the situation that the upper drain washing machine has a siphonage phenomenon and the situation that the upper drain washing machine has no siphonage phenomenon. It should be noted that, compared with the first embodiment, the second embodiment only differs in that the control operation performed according to different situations after determining whether the siphoning phenomenon occurs in the washing machine is performed, so only the differences between the two are described in detail herein, and the same points are described in the first embodiment, and are not repeated herein.
Referring to fig. 2, after stopping washing at step S100 and before starting draining at step S200, the drainage control method of the present embodiment further includes:
s101, acquiring a first water level value lw of a water containing barrel of an upper drainage washing machine 1 . The first water level value is also detected by a water level sensor arranged in the water bucket and is transmitted to the controller in a wired or wireless communication mode, and the controller stores the first water level value for later steps.
In the case where it is determined in step S701 that the siphon phenomenon has occurred, the step of "executing the corresponding control operation" includes:
s702, draining water in a water containing barrel of the upper drainage washing machine, and then feeding water until the water level in the water containing barrel reaches a first water level value lw 1 The water supply was stopped and the washing was restarted.
With continued reference to fig. 2, in the case where it is determined in step S703 that no siphon phenomenon occurs, the step of "executing the corresponding control operation" includes:
step S704, the washing is restarted.
Further, in order to improve the accuracy of determining whether the upper drain washing machine has a siphon phenomenon, steps S500 and S600 in the second embodiment of the drain control method of the present application are adjusted in the third embodiment of the drain control method of the present application, and the step flow chart of the third embodiment of the drain control method of the present application in fig. 3 is shown in detail. For convenience of distinction, step numbers S500 'and S600' are used in the third embodiment to represent the steps different from the second embodiment, and step numbers in the second embodiment are used for the same steps, and details are not repeated.
Referring to fig. 3, step S500' of the drainage control method of the third embodiment specifically includes: determining a maximum water level value lw of the n groups of water tanks in the first period a max And a minimum water level value lw min A first water level difference Deltalw between 1 N is more than or equal to 2, namely n is a positive integer which is more than or equal to 2.
Accordingly, the drainage control method of the third embodimentThe step S600' specifically includes: judging the difference Deltalw of each group of first water level 1 Whether or not they are all greater than a preset first water head difference threshold DeltaIw set1 。
It is conceivable that the third embodiment has more values collected in step S500 'than the second embodiment, and accordingly the condition for determining in step S600' is more strict, and the result of the determination is more accurate.
Further, in order to improve the accuracy of the drainage control method of the present application, the step S500' of the third embodiment is adjusted in the fourth embodiment of the drainage control method of the present application, and the step flow chart of the fourth embodiment of the drainage control method of the present application is shown in fig. 3. For convenience of distinction, the step number S500″ is used in the fourth embodiment to represent the steps different from the third embodiment, and the step numbers in the third embodiment are used for the same steps, and the details are not repeated.
Referring to fig. 4, step S500″ of the drainage control method in the fourth embodiment is specifically: determining the maximum water level value lw of the water containing barrels of the n groups in the first period a after the second period m max And a minimum water level value lw min A first water level difference Deltalw between 1 N is more than or equal to 2, namely the value of n is a positive integer which is more than or equal to 2.
In comparison with the third embodiment, the fourth embodiment determines n sets of first water level differences Deltalw 1 The washing machine is kept in the current state for a second period of time m before, and each group of first water level difference Deltalw can be made 1 The method is closer to the actual value, so that the accuracy of the judging result can be improved.
In addition, it should be noted that the specific value of the second period m depends on factors such as the function of the washing machine, the washing mode, and the actual installation location, and may be determined by those skilled in the art in practice. The second period m may take a value between 5 seconds and 12 seconds for a general home washing machine, preferably using m=10 seconds. It is understood that the specific value of the second period m does not limit the protection scope of the present application.
From the above, the fourth embodiment is a step S for the third embodiment500' is added to the partial limit condition (in determining the first water level difference DeltaIw 1 While the washing machine is kept in the present state for the second period m), it will be understood that the limiting condition can be directly added to the step S500 of the second embodiment, and the detailed description of this method will be given below with reference to the step flowchart of the fifth embodiment of the drainage control method of the present application in fig. 5, and only the distinguishing steps of the fifth embodiment with respect to the second embodiment will be described herein, and the same steps will not be repeated. Also, for convenience of distinction, the distinguishing steps of the fifth embodiment are denoted herein by the reference number S500' "and the same steps follow the step numbers of the second embodiment.
Referring to fig. 5, step S500' "of the drainage control method of the fifth embodiment is specifically: determining a maximum water level value lw of the tub in the first period a after the second period m max And a minimum water level value lw min A first water level difference Deltalw between 1 。
Referring to fig. 1-5, it can be seen that step S300 of the drainage control method of the first five embodiments is to determine whether the condition for stopping drainage is satisfied, and next, a specific determination method is described in detail with reference to fig. 6, and referring specifically to the step flowchart of the sixth embodiment of the drainage control method of the present application in fig. 6, the drainage control method of the sixth embodiment is the same as that of the fifth embodiment except for step S300, and step numbers of the fifth embodiment are followed for the same steps. Only the differences between the two are described in detail herein, and the same steps of the two are not repeated, so that those skilled in the art can fully realize the descriptions of the foregoing five embodiments. In addition, it should be noted that the sixth embodiment is described on the basis of the fifth embodiment, and it is understood that the specific determination method of step S300 in the sixth embodiment is equally applicable to the first, second, third and fourth embodiments.
Referring to fig. 6, step S300 of the drainage control method of the sixth embodiment specifically includes:
s301, obtaining a second water level value lw of the water bucket 2 ；
S302, judging the second water level value lw 2 Whether is smaller than or equal to a preset drainage stopping target water level value lw tv . Wherein, the water level value lw of the water stop and drain target tv The water level sensor is used for detecting the current water level value of the washing machine, and the water level sensor is used for detecting the current water level value of the washing machine.
If it is (second water level value lw) 2 Is smaller than or equal to the drainage stopping target water level value lw tv ) Step S303 is performed if not (second water level value lw 2 Is larger than the water level value lw of the water stop and drainage target tv ) Then returning to step S301 to continue to acquire the second water level value lw of the tub 2 。
S303, determining that the condition for stopping drainage is met.
In addition to the sixth embodiment, the drainage control method of the seventh embodiment of the present application provides another method of judging whether or not the drainage stop condition is satisfied, and is described in detail with reference to fig. 7, which is a flowchart of steps of the seventh embodiment of the drainage control method of the present application. Similarly, the seventh embodiment is also described based on the fifth embodiment, and in order to distinguish from the sixth embodiment, the step reference S300' is used in this embodiment to indicate the step of determining whether the drainage stopping condition is satisfied, the step numbers in the fifth embodiment are used for other step numbers, and the details of the same steps are not repeated here. In addition, it should be noted that the seventh embodiment is described on the basis of the fifth embodiment, and it is understood that the specific determination method of step S300' in the seventh embodiment is equally applicable to the first, second, third and fourth embodiments.
In detail, referring to fig. 7, step S300' of the drainage control method of the present application in the seventh embodiment specifically includes:
s301', obtaining a second water level value lw of the water bucket 2 ；
S302', determining a second water level value lw 2 And a preset drainage stopping target water level value lw tv Second water level difference between△lw 2 ；
S303', judging the second water level difference Deltalw 2 Whether is smaller than or equal to a preset second water level difference threshold DeltaIw set2 。
If it is (Deltalw) 2 ≤△lw set2 ) Step S304'; if no (Deltalw) 2 >△lw set2 ) The process returns to step S301'.
S304', it is determined that the condition for stopping drainage is satisfied.
The second water level difference threshold Δlw set2 The method is characterized in that a preset allowable detection deviation value of the water level sensor is provided, and the purpose of the method is to compensate the influence of external factors of water flow shaking on the detection accuracy of the water level sensor. A second water level difference threshold Deltalw set2 The specific value of (2) depends on the structure, working principle and other factors of the water level sensor, and can be determined by the skilled person according to the actual situation of the water level sensor when the second water level difference threshold Deltalw set2 The detection value of the water level sensor is equal to zero and is an ideal value. In the present application, the first water level difference threshold value and the second water level difference threshold value may be equal or unequal.
In addition, the present application also provides an upper drain washing machine including a controller configured to be capable of executing the above drain control method. It should be noted that the basic functional components and the working principle of the upper drain washing machine are basically the same as those of the prior art, and can be completely realized by those skilled in the art based on the prior art, so that the description thereof is omitted herein.
Thus far, the technical solution of the present application has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present application is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present application, and such modifications and substitutions will fall within the scope of the present application.
Claims (10)
1. The drain control method of the upper drain washing machine is characterized in that the upper drain washing machine receives a user stop instruction in the normal washing process, and the drain control method comprises the following steps:
stopping washing;
starting drainage;
judging whether a condition for stopping drainage is met;
if yes, stopping draining;
determining a maximum water level value lw of a tub of the upper drain washing machine in a first period a max And a minimum water level value lw min A first water level difference Deltalw between 1 ；
Judging the first water level difference Deltalw 1 Whether or not it is greater than a preset first water head difference threshold Deltalw set1 ；
And determining whether the siphoning phenomenon occurs or not according to the judging result and executing corresponding control operation.
2. The drainage control method according to claim 1, wherein the step of determining whether or not the siphon phenomenon has occurred based on the determination result includes: if the first water level difference Deltalw 1 Is larger than a preset first water level difference threshold Deltalw set1 It is determined that the siphon phenomenon occurs, otherwise it is determined that the siphon phenomenon does not occur.
3. The drain control method according to claim 2, wherein a maximum water level value lw of the tub of the upper drain washing machine in the first period a is determined max And a minimum water level value lw min A first water level difference Deltalw between 1 The method specifically comprises the following steps:
determining the maximum water level value lw of the water containing barrels of the upper drainage washing machine in the n groups in the first period a max And a minimum water level value lw min A first water level difference Deltalw between 1 ，n≥2；
"judge the first water level difference Deltalw 1 Whether or not it is greater than a preset first water head difference threshold Deltalw set1 The method specifically comprises the following steps:
judging the first water level difference Deltalw of each group 1 Whether or not it is greater than a preset first water head difference threshold Deltalw set1 。
4. The drain control method according to claim 2, wherein a maximum water level value lw of the tub of the upper drain washing machine in the first period a is determined max And a minimum water level value lw min A first water level difference Deltalw between 1 The method specifically comprises the following steps:
determining a maximum water level value lw of a water tub of the upper drain washing machine in a first period a after a second period m max And a minimum water level value lw min A first water level difference Deltalw between 1 。
5. The water drain control method as claimed in claim 4, wherein a maximum water level value lw of the tub of the upper drain washing machine in the first period a after the second period m is determined max And a minimum water level value lw min A first water level difference Deltalw between 1 The method specifically comprises the following steps:
determining the maximum water level value lw of the water containing barrels of the upper drainage washing machine in the first time period a after the second time period m max And a minimum water level value lw min A first water level difference Deltalw between 1 ，n≥2；
"judge the first water level difference Deltalw 1 Whether or not it is greater than a preset first water head difference threshold Deltalw set1 The method specifically comprises the following steps:
judging the first water level difference Deltalw of each group 1 Whether or not it is greater than a preset first water head difference threshold Deltalw set1 。
6. The drain control method according to any one of claims 2 to 5, characterized in that the drain control method further comprises, after the step of "stopping washing", before the step of "starting draining": acquiring a first water level value lw of the water containing bucket 1 ；
In "determining occurrence of siphoningIn this case, the step of "executing the corresponding control operation" includes: draining the water in the water containing barrel, and then feeding water to the first water level value lw 1 The water supply was stopped and the washing was restarted.
7. The drain control method according to any one of claims 2 to 5, wherein in the case where "it is determined that no siphon phenomenon occurs," the step of "performing the corresponding control operation" includes: the washing was started by re-washing.
8. The drainage control method according to claim 6, wherein the step of determining whether or not the condition for stopping drainage is satisfied includes:
acquiring a second water level value lw of the water containing bucket 2 ；
Judging the second water level value lw 2 Whether is smaller than or equal to a preset drainage stopping target water level value lw tv ；
If yes, determining that the condition for stopping draining is met, otherwise, returning to acquire a second water level value lw of the water containing barrel 2 "step.
9. The drainage control method according to claim 8, wherein the step of determining whether the condition for stopping drainage is satisfied includes:
acquiring a second water level value lw of the water containing bucket 2 ；
Determining the second water level value lw 2 And the drainage stopping target water level value lw tv A second water level difference Deltalw between 2 ；
Judging the second water level difference Deltalw 2 Whether is smaller than or equal to a preset first water level difference threshold DeltaIw set2 ；
If yes, determining that the condition for stopping draining is met, otherwise, returning to acquire the second water level value lw of the water containing barrel 2 "step.
10. The drainage control method according to claim 4 or 5, characterized in that the value range of the second period m is 5 seconds to 12 seconds, and/or the value range of the first period a is 5 seconds to 12 seconds.
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