CN115821524A - Water inlet control method of upper-drainage washing machine - Google Patents

Abstract

The application provides a water inlet control method of an upper drainage washing machine, which comprises the following steps: responding to a water inlet instruction, controlling a water inlet valve to be in an opening state within a first preset time period so as to inject water into the washing drum; detecting whether continuous siphon drainage occurs after water is fed through a water level sensor; when the water level sensor detects that continuous siphoning drainage phenomenon does not occur after water is fed, controlling the water inlet valve to be opened, and controlling the water inlet valve to be closed until the water inlet stopping condition is met, wherein the water inlet stopping condition comprises that the water level of washing water in the washing drum reaches a target set water level or the water inlet duration reaches a set water inlet duration threshold; when the water level sensor detects that water enters the water tank, the water level sensor controls the alarm device to give an alarm. Whether continuous siphon drainage phenomenon appears after can detecting intaking through level sensor to can prevent to drain water again when filling water to a washing section of thick bamboo, avoid because the water waste that siphon drainage phenomenon arouses.

Description

Water inlet control method for upper-drainage washing machine

Technical Field

The application relates to the technical field of intelligent electric appliances, in particular to a water inlet control method of an upper-drainage washing machine.

Background

The upper drainage washing machine generally adopts a drainage pump with a non-sealing structure to drain water, and in order to prevent the water in the inner cylinder from being drained, the drainage pipe adopts an inverted U-shaped design with a certain height (the highest position is higher than the water level of the inner cylinder). At the drainage in-process, drain pump during stop work, if the drain pipe is terminal to form sealedly with the outlet, unable intercommunication atmosphere, then the anhydrous top interlude of drain pipe can produce the negative pressure for water in drain pipe anterior segment and the back end is the luffing motion under the negative pressure suction effect. If remaining water in the drain pipe does not arrange to minimum water level, after intaking, when the water luffing motion in-process in the drain pipe anterior segment just in time does not just cross the top of falling the U type structure, can lead to getting into the water in the washing section of thick bamboo along with the abnormal discharge of drain pipe, the water flows over the top of falling the U type drain pipe in the drain pipe promptly, produces siphon drainage phenomenon. In this case, if the siphon drainage phenomenon is not treated in time, frequent water replenishment of the machine is required, wasting water resources, and affecting the washing effect.

Disclosure of Invention

The main objective of the embodiment of the present application is to provide an upward-drainage washing machine water inlet control method, which can detect whether a continuous siphon drainage phenomenon occurs after water is introduced through a water level sensor, can prevent water from being discharged while injecting water into a washing drum, avoid water waste caused by the siphon drainage phenomenon, and reduce frequent reminding of overtime alarm caused by the siphon drainage phenomenon.

In order to achieve the above object, the present application provides a method for controlling water inlet of an upper drainage washing machine,

the upper drainage washing machine comprises:

a washing tub for storing a space of washing water;

a water inlet valve for controlling the entry of the wash water into the wash drum;

a water level sensor for detecting a water level of the washing water in the washing tub;

the inverted U-shaped drain pipe is connected with the water outlet of the washing drum, and a siphon drainage phenomenon is generated when the tail end of the inverted U-shaped drain pipe is in a sealed state;

the alarm device is used for giving an alarm when the continuous siphon drainage phenomenon appears after water inflow is detected;

the water inflow control method comprises the following steps:

responding to a water inlet instruction, controlling the water inlet valve to be in an opening state within a first preset time period so as to inject water into the washing drum;

detecting whether a continuous siphoning drainage phenomenon occurs after water is fed through the water level sensor;

when the water level sensor detects that no continuous siphoning drainage phenomenon occurs after water is fed, controlling the water inlet valve to be opened until the water inlet stopping condition is met, and controlling the water inlet valve to be closed, wherein the water inlet stopping condition comprises that the water level of washing water in the washing drum reaches a target set water level or the water inlet duration reaches a set water inlet duration threshold;

when the water level sensor detects that the phenomenon of continuous siphon drainage occurs after water enters, the alarm device is controlled to give an alarm.

In some embodiments, the detecting, by the water level sensor, whether or not a continuous siphon drainage phenomenon occurs after water is introduced includes:

detecting whether a siphon drainage phenomenon occurs in a second preset time period through the water level sensor;

when the water level sensor detects that the siphon drainage phenomenon occurs in a second preset time period, the water level sensor detects whether the siphon drainage phenomenon occurs in a third preset time period;

when the water level sensor detects that the siphon drainage phenomenon occurs in a third preset time period, the continuous siphon drainage phenomenon is determined to occur after water enters.

In some embodiments, the detecting, by the water level sensor, whether a siphon discharge phenomenon occurs within a second preset time period includes:

acquiring a first change value through the water level sensor, wherein the first change value is a change value of the water level frequency value of the washing water in the washing drum in a second preset time period;

when the first change value exceeds a first preset threshold value, determining that a siphon drainage phenomenon occurs in the second preset time period;

and when the first change value does not exceed the first preset threshold value, determining that no siphon drainage phenomenon occurs in the second preset time period.

In some embodiments, the acquiring, by the water level sensor, a first variation value includes:

acquiring a maximum water level frequency value and a minimum water level frequency value in the second preset time period through the water level sensor;

subtracting the minimum water level frequency value from the maximum water level frequency value to obtain the first change value;

or;

acquiring a first water level frequency value and a second water level frequency value through the water level sensor, wherein the first water level frequency value is a water level frequency value corresponding to the starting moment of the second preset time period, and the second water level frequency value is a water level frequency value corresponding to the ending moment of the second preset time period;

and acquiring the first change value according to the first water level frequency value and the second water level frequency value.

In some embodiments, the detecting, by the water level sensor, whether or not a siphon discharge phenomenon occurs within a second preset time period includes:

acquiring a first rate of change value through the water level sensor, wherein the first rate of change value is the rate of change value of the water level frequency value of the washing water in the washing drum in a second preset time period within unit time;

when the first rate of change value exceeds a second preset threshold value, determining that a siphon drainage phenomenon occurs in the second preset time period;

and when the first change rate value does not exceed the second preset threshold value, determining that the siphon drainage phenomenon does not occur in the second preset time period.

In some embodiments, obtaining a first rate of change value by the water level sensor comprises:

acquiring a first change value through the water level sensor, wherein the first change value is a change value of the water level frequency value of the washing water in the washing drum in a second preset time period;

and acquiring the first change rate value according to the first change value and the second preset time period.

In some embodiments, when it is detected by the water level sensor that the siphon discharge phenomenon occurs within the second preset time period, detecting by the water level sensor whether the siphon discharge phenomenon occurs within the third preset time period includes:

when the water level sensor detects that a siphon drainage phenomenon occurs in a second preset time period, acquiring a second change value, wherein the second change value is a change value of the water level frequency value of the washing water in the washing drum in a third preset time period;

when the second variation value exceeds a third preset threshold value, determining that a siphon drainage phenomenon occurs in a third preset time period;

and when the second variation value does not exceed the third preset threshold value, determining that the siphon drainage phenomenon does not occur in a third preset time period.

In some embodiments, when it is detected by the water level sensor that the siphon discharge phenomenon occurs within the second preset time period, detecting by the water level sensor whether the siphon discharge phenomenon occurs within the third preset time period includes:

when the water level sensor detects that a siphon drainage phenomenon occurs in a second preset time period, a second change rate value is obtained, wherein the second change rate value is a change value of the water level frequency value of the washing water in the washing drum in a third preset time period within unit time;

when the second rate of change value exceeds a fourth preset threshold value, determining that a siphon drainage phenomenon occurs in the third preset time period;

and when the second rate of change value does not exceed the fourth preset threshold value, determining that the siphon drainage phenomenon does not occur in the third preset time period.

In some embodiments, the method further comprises:

when the water level sensor detects that the siphon drainage phenomenon does not occur in the second preset time period or the siphon drainage phenomenon does not occur in the third preset time period, determining that the continuous siphon drainage phenomenon does not occur after water enters;

and controlling the water inlet valve to be opened until the water inlet stopping condition is met, and controlling the water inlet valve to be closed.

In some embodiments, after the continuous siphon drainage phenomenon occurs after the water level sensor detects that water enters, and the alarm device is controlled to give an alarm, the method further comprises:

treating the siphon drainage phenomenon;

and after the treatment, returning to respond to a water inlet instruction, and controlling the water inlet valve to be in an open state within a first preset time period so as to inject water into the washing drum.

The application provides a water inlet control method of an upper drainage washing machine, which comprises the following steps: responding to a water inlet instruction, controlling a water inlet valve to be in an opening state within a first preset time period so as to inject water into the washing drum; detecting whether a continuous siphoning drainage phenomenon occurs after water is fed through a water level sensor; when the water level sensor detects that continuous siphoning drainage phenomenon does not occur after water is fed, controlling the water inlet valve to be opened, and controlling the water inlet valve to be closed until the water inlet stopping condition is met, wherein the water inlet stopping condition comprises that the water level of washing water in the washing drum reaches a target set water level or the water inlet duration reaches a set water inlet duration threshold; when the water level sensor detects that water enters the water tank, the water level sensor controls the alarm device to give an alarm. Whether continuous siphon drainage phenomenon appears after can detecting intaking through level sensor, when detecting to appear continuous siphon drainage phenomenon, can control alarm device and send the police dispatch newspaper to can prevent to drain water again when annotating water to the washing barrel, avoid because the water waste that siphon drainage phenomenon arouses, and can reduce the overtime alarm that arouses because of siphon drainage phenomenon and frequently remind.

Drawings

Fig. 1 is a structural view of an upper drain laundry machine for performing a water inlet control method according to an embodiment of the present application;

FIG. 2 is a flow chart of a method for controlling water intake of an upper drain washing machine according to an embodiment of the present application;

FIG. 3 is another flow chart of the method for controlling the water inlet of the upper drain washing machine according to the embodiment of the present application;

FIG. 4 is a flowchart illustrating steps of detecting whether a continuous siphon discharge phenomenon occurs after water is introduced by a water level sensor according to an embodiment of the present disclosure;

fig. 5 is a flowchart illustrating steps of detecting whether a siphon discharge phenomenon occurs within a second preset time period by a water level sensor according to an embodiment of the present application;

FIG. 6 is a flowchart illustrating steps of acquiring a first variation value by a water level sensor according to an embodiment of the present disclosure;

fig. 7 is another flowchart for detecting whether a siphon discharge phenomenon occurs within a second preset time period by a water level sensor according to an embodiment of the present application;

fig. 8 is a flowchart illustrating another step of detecting whether a siphon discharge phenomenon occurs within a second preset time period by a water level sensor according to an embodiment of the present application;

fig. 9 is another flowchart for detecting whether a siphon discharge phenomenon occurs within a second preset time period by a water level sensor according to an embodiment of the present application;

fig. 10 is a flowchart illustrating steps of detecting whether a siphon discharge phenomenon occurs within a third preset time period by a water level sensor according to an embodiment of the present application;

fig. 11 is another flowchart for detecting whether a siphon discharge phenomenon occurs within a third preset time period by a water level sensor according to an embodiment of the present application;

fig. 12 is a flowchart illustrating another step of detecting whether a siphon discharge phenomenon occurs within a third preset time period by using a water level sensor according to an embodiment of the present application;

fig. 13 is another flowchart for detecting whether a siphon discharge phenomenon occurs within a third preset time period by a water level sensor according to an embodiment of the present application;

fig. 14 is a flow chart of the water inlet control of the upper drain washing machine according to the embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It is noted that while functional block divisions are provided in device diagrams and logical sequences are shown in flowcharts, in some cases, steps shown or described may be performed in sequences other than block divisions within devices or flowcharts. The terms first, second and the like in the description and in the claims, and the drawings described above, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of the present application only and is not intended to be limiting of the application.

According to different drainage modes, a washing machine usually comprises an upper drainage washing machine and a lower drainage washing machine, and in comparison, the upper drainage washing machine has lower requirements on installation environment, so that the washing machine is widely favored by users.

The upper drainage washing machine generally adopts a drainage pump with a non-sealing structure to drain water, and in order to prevent the water in the inner cylinder from being drained, the drainage pipe adopts an inverted U-shaped design with a certain height (the highest position is higher than the water level of the inner cylinder). At the drainage in-process, drain pump during stop work, if the drain pipe is terminal to form sealedly with the outlet, unable intercommunication atmosphere, then the anhydrous top interlude of drain pipe can produce the negative pressure for water in drain pipe anterior segment and the back end is the luffing motion under the negative pressure suction effect. If remaining water in the drain pipe does not arrange to minimum water level, after intaking, when the water luffing motion in-process in the drain pipe anterior segment just in time does not just cross the top of the type of falling U drain pipe, can lead to getting into the water in the washing section of thick bamboo along with the abnormal discharge of drain pipe, the water flows over the top of the type of falling U structure in the drain pipe promptly, produces siphon drainage phenomenon.

Siphon drainage is caused by the attractive force and potential difference between liquid molecules. That is, the water rises and then flows to the lower part by using the pressure difference of the water column. Because the water surface of the pipe orifice bears approximately the same atmospheric pressure, the resultant pressure of the short side of the water column is large, and the resultant pressure of the high side of the water column is small, water can flow from the side with large resultant pressure to the side with small resultant pressure until the resultant pressures of the two sides are equal. When the tail end of the inverted U-shaped drain pipe is in a sealed state, namely, the tail end is not communicated with the atmosphere, water in the washing drum can be discharged along the drain pipe, namely, a siphon drainage phenomenon is generated.

If the siphon phenomenon occurs in the water inlet process, on one hand, the washing machine needs to frequently replenish water, and the water resource is wasted; on one hand, the condition of overtime alarm of water inlet frequently occurs because the water inlet can not be completed on time, so that a user needs to frequently check and process the water inlet, and the user experience of the upper-drainage washing machine is further influenced.

Based on this, the embodiment of the application provides a water inlet control method of an upper drainage washing machine. Whether can appear continuing siphon drainage phenomenon after can intaking through level sensor detection, can prevent again in the drainage to the washing section of thick bamboo water injection, avoid because the water waste that siphon drainage phenomenon arouses to and can reduce the overtime alarm that arouses because of siphon drainage phenomenon and frequently remind.

First, an upper drain washing machine that executes the water inlet control method proposed in the embodiment of the present application will be described. Referring to fig. 1, fig. 1 is a structural view of an upper drain laundry machine for performing a water inlet control method according to an embodiment of the present application. As shown in fig. 1, the upper drain washing machine includes:

a washing tub 100 for storing a space of washing water;

a water inlet valve 110 for controlling the inflow of washing water into the washing tub;

a water level sensor 120 for detecting a water level of the washing water in the washing tub;

an inverted U-shaped drain pipe 130 connected to a drain port of the washing tub 100, and generating a siphon drain phenomenon when a distal end of the inverted U-shaped drain pipe 130 is in a sealed state;

the alarm device 140 is used for giving an alarm when the continuous siphon drainage phenomenon appears after water inflow is detected;

in the embodiment of the application, after the upper drainage washing machine is started to work, water inlet control can be performed through the water inlet processing logic when water is required to be fed, and drainage can be performed through the drainage control logic when water is required to be drained. When the starting button of the upper draining washing machine is triggered, the system can send a water inlet instruction, and at the moment, the water inlet valve can be opened in response to the water inlet instruction, so that water in the faucet can flow into the washing cylinder along the water inlet pipe. When the washing is finished, the system sends a drainage instruction, and the drainage pump starts to work, so that the water in the washing cylinder is drained through the inverted U-shaped drainage pipe.

It will be understood that fig. 1 only shows the hardware configuration of the upper drain washing machine that needs to participate in the water inlet control logic, and that the upper drain washing machine includes other hardware such as a washing machine cabinet, a drain pump, etc., in addition to that. The embodiment of the application has no limit to the specific structural components of the upper drainage washing machine, the specific morphological characteristics and the relative position relationship among the components, the connection mode and the like. However, in order to implement the water inlet control method according to the embodiment of the present application, the upper drain washing machine must include the washing tub 100, the water inlet valve 110, the water level sensor 120, the inverted U-shaped drain pipe 130, and the alarm device 140.

Referring to fig. 2, fig. 2 is a flow chart of a water inlet control method of an upper drainage washing machine provided in the embodiment of the present application; including but not limited to step S201 through step S204.

Step S201, responding to a water inlet instruction, controlling a water inlet valve to be in an open state within a first preset time period so as to inject water into a washing drum.

In the embodiment of the application, the upper draining washing machine system responds to the water inlet instruction and controls the water inlet valve to be in an opening state within a first preset time period so as to inject water into the washing drum. For example, if the first preset time period is set to 5 seconds, the water inlet valve is in an open state within 5 seconds, so that a certain amount of water can be injected into the washing drum.

Step S202, whether a continuous siphon drainage phenomenon occurs after water is fed is detected through a water level sensor.

In the embodiment of the application, the water level sensor can detect the water level of the washing water in the washing drum in real time. Specifically, the water level sensor judges the water level of the washing water in the washing drum according to the air pressure in a water pressure air pipe connected with the inner side of the washing drum. The higher the water level is, the larger the water pressure is, so that the inductance of an inductance coil in the sensor is larger, and then according to a parallel resonance frequency formula of the inductance and the capacitance:

the smaller the obtained resonant frequency is, on the contrary, the lower the water level is, the smaller the water pressure is, the smaller the inductance of the inductance coil in the sensor is, and the larger the corresponding resonant frequency is. And then the generated resonant frequency is processed by a singlechip to judge the height of the water level. Whether the continuous siphon drainage phenomenon occurs after water is fed can be judged by detecting the water level change of the washing water in the washing drum. For example, if it is found that the level of the washing water in the washing tub is lowered for a period of time T1, it is determined that water is discharged from the drain pipe after the water is supplied, it is determined that the siphon-off phenomenon occurs. And judging that the water level of the washing water in the washing drum is continuously reduced within a period of time T2, and determining that the continuous siphon drainage phenomenon occurs. And if it is found that the level of the washing water in the washing tub is not lowered for a period of time T1, it is determined that the siphon-off phenomenon does not occur after the water is introduced.

It should be noted that the water level frequency value is obtained from the water level sensor, and the larger the water level frequency value is, the lower the water level of the washing water in the washing drum is; the smaller the value of the water level frequency, the higher the water level of the washing water in the washing tub.

It should be noted that, in the embodiment of the present application, the water level sensor may be an electromagnetic water level sensor or a mechanical water level sensor, and the embodiment of the present application does not specifically limit the water level sensor, as long as the water level frequency value of the washing water in the washing drum can be obtained in real time.

And S203, when the water level sensor detects that no continuous siphon drainage phenomenon occurs after water is fed, controlling the water inlet valve to open until the water inlet stopping condition is met, and controlling the water inlet valve to close, wherein the water inlet stopping condition comprises that the water level of the washing water in the washing drum reaches a target set water level or the water inlet duration reaches a set water inlet duration threshold.

In the embodiment of the application, because level sensor can acquire the water level change of the washing water in the washing barrel in real time, and then whether continuous siphon drainage phenomenon appears after the accessible level sensor judges intaking. When the continuous siphon drainage phenomenon is detected not to occur, the water inlet valve can be controlled to be opened, water is continuously injected into the washing drum, and the water inlet valve is controlled to be closed until the water level of the washing water in the washing drum reaches a target set water level or the water inlet duration reaches a set water inlet duration threshold value.

And step S204, when the water level sensor detects that water enters the water tank, the water tank generates continuous siphon drainage, and the alarm device is controlled to give an alarm.

In the embodiment of the application, when the water level sensor detects that the continuous siphon drainage phenomenon occurs after water enters, the alarm device is controlled to give an alarm, so that a user can be reminded of the occurrence of the siphon drainage phenomenon. At this time, the user can pause the washing machine, take the drain pipe out of the sewer pipe, connect the tail end of the drain pipe with air, then insert the drain pipe into the sewer pipe, and start the washing machine to continue washing by feeding water. Or after the washing machine is suspended, cleaning the blockage in the sewer pipe, inserting the drain pipe into the sewer pipe after the blockage problem of the sewer pipe or the sewer is solved, and starting the washing machine to continuously feed water for washing.

In the embodiment of the application, after the continuous siphon drainage phenomenon appears after detecting out through level sensor that intakes, need carry out corresponding processing to the siphon drainage, after handling, return step S201 again, control the water intaking valve promptly and be in the open mode in 5 seconds to can pour into a certain amount of water into the washing barrel, then continue whether still appear after detecting into water through level sensor and continue to siphon drainage phenomenon. If the continuous siphon drainage phenomenon still occurs, the corresponding treatment for siphon drainage is invalid, and at the moment, the washing machine is suspended, and other reasons for the siphon drainage phenomenon are found out. If the continuous siphon drainage phenomenon does not occur, the corresponding treatment of the siphon drainage is effective, and the washing machine is controlled to continue working.

Referring to fig. 3, fig. 3 is another flowchart of the method for controlling water intake of an upper drain washing machine according to the embodiment of the present application, including but not limited to step S301 to step S309.

Step S301, responding to a water inlet instruction, and opening a water inlet valve;

step S302, judging whether the water inlet time reaches a preset time;

step S303, if the water inlet time reaches the preset time, closing the water inlet valve;

step S304, judging whether a continuous siphon drainage phenomenon occurs;

step S305, if the continuous siphon drainage phenomenon occurs, controlling an alarm device to give an alarm;

step S306, if the continuous siphon drainage phenomenon does not occur, opening a water inlet valve;

step S307, judging whether the water level of the washing water in the washing drum reaches a target set water level;

step S308, or judging whether the water inlet time length reaches a set water inlet time length threshold value;

step S309, if the target set water level is reached or the set water inlet time length threshold is reached, closing the water inlet valve.

Referring to fig. 4, fig. 4 is a flowchart illustrating steps of detecting whether a continuous siphon drainage phenomenon occurs after water is fed through a water level sensor according to an embodiment of the present application, including, but not limited to, steps S401 to S403.

And S401, detecting whether a siphon drainage phenomenon occurs in a second preset time period through a water level sensor.

In the embodiment of the application, whether the siphon drainage phenomenon occurs in the second preset time period can be detected through the water level sensor. For example, the second preset time is set to be T2, the water level sensor can detect a water level frequency value at any time within the T2 time period, and then whether a siphon drainage phenomenon occurs within the T2 time period can be determined according to the detected water level frequency value.

Referring to fig. 5, fig. 5 is a flowchart illustrating steps of detecting whether a siphon water discharge phenomenon occurs within a second preset time period by a water level sensor according to an embodiment of the present application, including, but not limited to, steps S501 to S503.

Step S501, a first change value is obtained through a water level sensor, and the first change value is a change value of a water level frequency value of washing water in a washing drum in a second preset time period;

step S502, when the first change value exceeds a first preset threshold value, determining that a siphon drainage phenomenon occurs in a second preset time period;

step S503, when the first variation value does not exceed the first preset threshold, determining that the siphon drainage phenomenon does not occur within the second preset time period.

In the embodiment of the present application, a first variation value may be obtained by the water level sensor, and the first variation value is a variation value of a water level frequency value of the washing water in the washing tub within a second preset time period. Then comparing the first change value with a first preset threshold value, and determining that a siphon drainage phenomenon occurs in a second preset time period if the first change value exceeds the first preset threshold value; and if the first change value does not exceed the first preset threshold value, determining that the siphon drainage phenomenon does not occur in a second preset time period.

It should be noted that, in the embodiment of the present application, it is considered that after water is fed, some water flows into the front section of the drain pipe, but does not exceed the top of the inverted U-shaped structure of the drain pipe, so that the water is not discharged from the drain pipe, but some water flows into the front section of the drain pipe, so that the water level of the washing water in the washing drum is lowered. Therefore, it is determined that water is discharged from the drain pipe only by judging that the water level of the washing water in the washing tub is lowered, and it is inaccurate that the siphon phenomenon occurs. According to the embodiment of the application, whether the siphon drainage phenomenon occurs in the second preset time period after water enters can be accurately judged by predetermining one threshold value, namely the first preset threshold value. That is, the water level of the washing water in the washing tub should not only be decreased, but also the decreased value, i.e., the first variation value, should exceed the first preset threshold value, so that it can be determined that the siphon discharge phenomenon occurs within the second preset time period after the water is introduced. Conversely, if the drop value, that is, the first variation value does not exceed the first preset threshold, it is determined that the siphon discharge phenomenon does not occur within the second preset time period after the water is introduced.

It can be understood that, in the embodiment of the present application, if the water level of the washing water in the washing tub is not lowered, i.e., the first variation value is 0, which indicates that no water enters the drain pipe after the water is introduced, the siphon phenomenon is less likely to occur.

It can be understood that, in the embodiment of the present application, if it is determined by the water level sensor that the siphon drainage phenomenon does not occur within the second preset time period, the water inlet valve is controlled to be opened until the water inlet stop condition is met, and the water inlet valve is controlled to be closed.

Referring to fig. 6, fig. 6 is a flowchart illustrating steps of acquiring a first variation value by a water level sensor according to an embodiment of the present application, including, but not limited to, steps S601 to S604.

Step S601, acquiring a maximum water level frequency value and a minimum water level frequency value in a second preset time period through a water level sensor;

step S602, subtracting the minimum water level frequency value from the maximum water level frequency value to obtain a first variation value;

or;

step S603, a first water level frequency value and a second water level frequency value are obtained through a water level sensor, the first water level frequency value is a water level frequency value corresponding to the starting moment of a second preset time period, and the second water level frequency value is a water level frequency value corresponding to the ending moment of the second preset time period;

step S604, a first variation value is obtained according to the first water level frequency value and the second water level frequency value.

In the embodiment of the application, the water level sensor can acquire the water level frequency value at any time in the second preset time period T2. And considering that the washing tub is directly connected to the drain pipe, that is, part of water in the washing tub may flow into the drain pipe, resulting in a fluctuating level of the washing water in the washing tub after the water is introduced. At this time, the maximum water level frequency value and the minimum water level frequency value can be obtained through the water level sensor, that is, the maximum water level frequency value and the minimum water level frequency value are selected from the second preset time period T2, and then the minimum water level frequency value is subtracted from the maximum water level frequency value to obtain a first change value.

In addition, in the embodiment of the present application, it is considered that the water level of the washing water in the washing tub after the water is introduced is fluctuated, but the fluctuation value is not large. Therefore, a first water level frequency value and a second water level frequency value can also be obtained through the water level sensor, the first water level frequency value is a water level frequency value corresponding to the starting moment of the second preset time period, and the second water level frequency value is a water level frequency value corresponding to the ending moment of the second preset time period. And acquiring a first change value according to the first water level frequency value and the second water level frequency value. For example, the starting time of the second time period T2 is T ₀ The last time is t ₁ I.e. t ₁ －t ₀ And = T2. At this time, t is acquired ₀ Water level frequency value and t corresponding to time ₁ The corresponding water level frequency value at the moment, and then t ₁ Value of water level frequency at time minus t ₀ And obtaining a first change value by the water level frequency value corresponding to the moment.

Referring to fig. 7, fig. 7 is another flowchart for detecting whether a siphon water discharge phenomenon occurs in a second preset time period through a water level sensor according to an embodiment of the present application, including but not limited to step S701 to step S707.

Step S701, acquiring a maximum water level frequency value and a minimum water level frequency value through a water level sensor;

step S702, obtaining a first change value according to the maximum water level frequency value and the minimum water level frequency value;

step 703, or acquiring a first water level frequency value and a second water level frequency value through a water level sensor;

step S704, obtaining a first change value according to the first water level frequency value and the second water level frequency value;

step S705, judging whether the first change value is larger than a first preset threshold value;

step S706, if the first variation value is larger than a first preset threshold value, determining that a siphon drainage phenomenon occurs in a second preset time period;

in step S707, if the first variation value is not greater than the first preset threshold, it is determined that the siphon water discharge phenomenon does not occur within the second preset time period.

Referring to fig. 8, fig. 8 is a flowchart illustrating another step of detecting whether a siphon water discharge phenomenon occurs within a second preset time period by a water level sensor according to an embodiment of the present application, including but not limited to steps S801 to S803.

Step S801, acquiring a first change rate value through a water level sensor, wherein the first change rate value is the change rate value of the water level frequency value of the washing water in the washing drum in a second preset time period within unit time;

step S802, when the first change rate value exceeds a second preset threshold value, determining that a siphon drainage phenomenon occurs in a second preset time period;

and step S803, when the first rate of change value does not exceed a second preset threshold value, determining that no siphon drainage phenomenon occurs in a second preset time period.

In the embodiment of the application, whether the siphon drainage phenomenon occurs in the second preset time period can be judged by comparing the first change value with the first preset threshold value, and whether the siphon drainage phenomenon occurs in the second preset time period can be judged by comparing the first change value with the second preset threshold value. Specifically, a first rate of change, which is a rate of change per unit time of a value of a water level frequency of the washing water in the washing tub in a second preset time period, that is, a rate of decrease of the water level, is first obtained by the water level sensor. When the first rate of change value exceeds a second preset threshold value, namely the water level reduction rate exceeds the second preset threshold value, determining that a siphon drainage phenomenon occurs in a second preset time period; and when the first rate of change value does not exceed a second preset threshold value, namely the water level reduction rate does not exceed the second preset threshold value, determining that the siphon drainage phenomenon does not occur in a second preset time period.

In the embodiment of the present application, since fig. 6 already shows a specific acquiring process of the first variation value, the first variation value can be acquired only on the basis of fig. 6, that is, after the first variation value is acquired by the water level sensor, according to the first variation value and the second preset time period. Specifically, the water level decreasing rate (first rate value) may be obtained by dividing the first change value by the second preset time period.

Referring to fig. 9, fig. 9 is another flowchart for detecting whether a siphon water discharge phenomenon occurs within a second preset time period by a water level sensor according to an embodiment of the present application, including but not limited to step S901 to step S908.

Step S901, obtaining a maximum water level frequency value and a minimum water level frequency value by a water level sensor;

step S902, obtaining a first change value according to the maximum water level frequency value and the minimum water level frequency value;

step S903, or acquiring a first water level frequency value and a second water level frequency value through a water level sensor;

step S904, obtaining a first change value according to the first water level frequency value and the second water level frequency value;

step S905, obtaining a first change rate value according to the first change value and a second preset time period;

step S906, judging whether the first rate of change value is larger than a second preset threshold value;

step S907, if the first rate of change value is larger than a second preset threshold value, determining that a siphon drainage phenomenon occurs in a second preset time period;

step S908, if the first rate of change value is not greater than the second predetermined threshold, determining that no siphon drainage occurs within the second predetermined time period.

And S402, when the water level sensor detects that the siphon drainage phenomenon occurs in the second preset time period, detecting whether the siphon drainage phenomenon occurs in the third preset time period.

In the embodiment of the present application, when the water level sensor detects that the siphon drainage phenomenon occurs within the second preset time period, the reason for considering that the siphon drainage phenomenon occurs within the second preset time period includes 2 types: (1) The tail end of the drain pipe is not communicated with air, and the middle section of the waterless top of the drain pipe generates negative pressure, so that part of water in the washing cylinder enters the exhaust pipe and flows out of the top of the inverted U-shaped structure; (2) In the water inlet process, water swings up and down in the process that water falls into the washing cylinder (at the lower part) from the water inlet (at the higher part) so that part of water enters the exhaust pipe and flows out from the top of the inverted U-shaped structure.

In the embodiment of the present application, in order to further clarify the reason for the occurrence of the siphon water discharge phenomenon in the second preset time period, it is further required to detect whether the siphon water discharge phenomenon occurs in the third preset time period by using the water level sensor.

Referring to fig. 10, fig. 10 is a flowchart illustrating steps of detecting whether a siphon drainage phenomenon occurs within a third preset time period by a water level sensor according to an embodiment of the present application, including, but not limited to, steps S1001 to S1003.

Step S1001, acquiring a second change value, wherein the second change value is a change value of the water level frequency value of the washing water in the washing drum in a third preset time period;

step S1002, when the second variation value exceeds a third preset threshold value, determining that a siphon drainage phenomenon occurs in a third preset time period;

and step S1003, when the second variation value does not exceed a third preset threshold value, determining that the siphon drainage phenomenon does not occur in a third preset time period.

In this embodiment, the second variation value may be obtained by the water level sensor, and the second variation value is a variation value of a water level frequency of the washing water in the washing tub within a third preset time period. Then comparing the second variation value with a third preset threshold value, and determining that a siphon drainage phenomenon occurs in a third preset time period if the second variation value exceeds the third preset threshold value; and if the second variation value does not exceed a third preset threshold value, determining that the siphon drainage phenomenon does not occur within a third preset time period.

It should be noted that, in the application embodiment, on the basis that the water level sensor detects that the siphon drainage phenomenon occurs within the second preset time period, if it is determined by the water level sensor that the siphon drainage phenomenon also occurs within the third preset time period, it may be determined that the continuous siphon phenomenon occurs after water enters. At the moment, the fact that the tail end of the drain pipe is not communicated with air when the siphon drainage phenomenon occurs in the second preset time period can be judged, and negative pressure is generated in the middle section of the anhydrous top of the drain pipe, so that part of water in the washing drum enters the exhaust pipe and flows out from the top of the inverted U-shaped structure. And if the water level sensor determines that the siphon drainage phenomenon does not occur within the third preset time period, the continuous siphon phenomenon can be judged not to occur after water enters. At the moment, the phenomenon that siphon drainage occurs in the second preset time period can be judged to be the water inlet process, and water falls into the washing cylinder (at the lower part) from the water inlet (at the higher part) in the process of water up-and-down swinging to enable part of water to enter the exhaust pipe and flow out from the top of the inverted U-shaped structure.

It can be understood that, in the embodiment of the present application, if it is determined by the water level sensor that the siphon drainage phenomenon does not occur within the third preset time period, the water inlet valve is controlled to be opened until the water inlet stop condition is met, and the water inlet valve is controlled to be closed.

It should be noted that, in the embodiment of the present application, a process of acquiring the second variation value by the water level sensor is the same as the process of acquiring the first variation value by the water level sensor shown in fig. 6, and details are not repeated here.

Referring to fig. 11, fig. 11 is another flowchart for detecting whether a siphon water drainage phenomenon occurs within a third preset time period by a water level sensor according to an embodiment of the present application, including but not limited to steps S1101 to S1107.

Step 1101, acquiring a maximum water level frequency value and a minimum water level frequency value through a water level sensor;

step S1102, obtaining a second variation value according to the maximum water level frequency value and the minimum water level frequency value;

step S1103, or acquiring a third water level frequency value and a fourth water level frequency value by using the water level sensor, where the third water level frequency value is a water level frequency value corresponding to the start time of a third preset time period, and the fourth water level frequency value is a water level frequency value corresponding to the end time of the third preset time period;

step S1104, obtaining a second variation value according to the third water level frequency value and the fourth water level frequency value;

step S1105, judging whether the second variation value is larger than a third preset threshold value;

step S1106, determining that a siphon drainage phenomenon occurs within a third preset time period if the second variation value is greater than a third preset threshold value;

in step S1107, if the second variation value is not greater than a third preset threshold, it is determined that a siphon drainage phenomenon does not occur within a third preset time period.

Referring to fig. 12, fig. 12 is a flowchart illustrating another step of detecting whether a siphon water discharge phenomenon occurs within a third preset time period by a water level sensor according to an embodiment of the present application, including, but not limited to, steps S1201 to S1203.

Step S1201, acquiring a second change rate value, wherein the second change rate value is the change value of the water level frequency value of the washing water in the washing drum in unit time within a third preset time period;

step S1202, when the second rate of change value exceeds a fourth preset threshold value, determining that a siphon drainage phenomenon occurs in a third preset time period;

in step S1203, when the second rate of change value does not exceed the fourth preset threshold, it is determined that the siphon drainage phenomenon does not occur within the third preset time period.

In the embodiment of the application, in addition to the fact that whether the siphon drainage phenomenon occurs in the third preset time period can be judged by comparing the second variation value with the third preset threshold value, whether the siphon drainage phenomenon occurs in the third preset time period can also be judged by comparing the second variation value with the fourth preset threshold value. Specifically, a second rate of change value, which is a rate of change value per unit time of the water level frequency value of the washing water in the washing tub in the third preset time period, that is, a rate of decrease of the water level, is obtained by the water level sensor. When the second rate of change value exceeds a fourth preset threshold value, namely the water level decrease rate exceeds the fourth preset threshold value, determining that a siphon drainage phenomenon occurs in a third preset time period; and when the second rate of change value does not exceed a fourth preset threshold value, namely the water level reduction rate does not exceed the fourth preset threshold value, determining that the siphon drainage phenomenon does not occur in a third preset time period.

In the embodiment of the application, similarly, after the second change value is obtained by the water level sensor, the second change value can be obtained according to the second change value and a third preset time period. Specifically, the water level decreasing rate (second rate of change value) may be obtained by dividing the second rate of change by the third preset time period.

Referring to fig. 13, fig. 13 is another flowchart for detecting whether a siphon water discharge phenomenon occurs within a third preset time period by a water level sensor according to the embodiment of the present application, including but not limited to step S1301 to step S1308.

Step S1301, acquiring a maximum water level frequency value and a minimum water level frequency value through a water level sensor;

step S1302, obtaining a second variation value according to the maximum water level frequency value and the minimum water level frequency value;

step S1303, or acquiring a third water level frequency value and a fourth water level frequency value by a water level sensor, where the third water level frequency value is a water level frequency value corresponding to the starting time of a third preset time period, and the fourth water level frequency value is a water level frequency value corresponding to the ending time of the third preset time period;

step S1304, obtaining a second variation value according to the third water level frequency value and the fourth water level frequency value;

step 1305, obtaining a second change rate value according to the second change value and a third preset time period;

step 1306, judging whether the second rate of change value is larger than a fourth preset threshold value;

step 1307, if the second rate of change value is greater than a fourth preset threshold, determining that a siphon drainage phenomenon occurs within a third preset time period;

step S1308, if the second rate of change value is not greater than the fourth preset threshold, it is determined that the siphon drainage phenomenon does not occur within the third preset time period.

And S403, when the water level sensor detects that the siphon drainage phenomenon occurs in the third preset time period, determining that the continuous siphon drainage phenomenon occurs after water enters.

In the embodiment of the application, after the siphon drainage phenomenon appears in the second preset time period through the detection of the water level sensor, if the siphon drainage phenomenon also appears in the third preset time period through the detection of the water level sensor, at the moment, the continuous siphon drainage phenomenon appears after water inflow can be determined.

Referring to fig. 14, fig. 14 is a flow chart of the water inlet control of the upper drainage washing machine provided by the embodiment of the present application, including the following steps:

step S1401, responding to a water inlet instruction, and opening a water inlet valve;

step S1402, judging whether the water inlet time length reaches a preset time length;

step S1403, if the water inlet time reaches the preset time, closing the water inlet valve;

step S1404, acquiring a first change value in a second preset time period through a water level sensor;

step S1405, determining whether the first variation value is greater than a first preset threshold value;

step S1406, or acquiring a first rate of change value in a second preset time period through the water level sensor;

step S1407, determining whether the first rate of change value is greater than a second preset threshold value;

step S1408, if the first variation value is greater than a first preset threshold, or the first variation value is greater than a second preset threshold, obtaining a second variation value within a third preset time period by the water level sensor;

step S1409, determining whether the second variation value is greater than a third preset threshold value;

step 1410, or acquiring a second rate of change value in a third preset time period through the water level sensor;

step S1411, determining whether the second rate of change value is greater than a fourth preset threshold;

step S1412, if the second variation value is greater than the third preset threshold value, or the second variation value is greater than the fourth preset threshold value, controlling the alarm device to send out an alarm;

step S1413, if the first variation value is not greater than the first preset threshold, or the first variation value is not greater than the second preset threshold; or the second change value is not more than the third preset threshold value, or the second change value is not more than the fourth preset threshold value, and the water inlet valve is opened;

step S1414, determining whether the water level of the washing water in the washing tub reaches a target set water level;

step S1415, or judging whether the water inlet duration reaches a set water inlet duration threshold value;

in step S1416, if the target set water level is reached or the set water inlet duration threshold is reached, the water inlet valve is closed.

It can be understood that, in the embodiment of the present application, the first preset time period, the second preset time period, the third preset time period, the first preset threshold, the second preset threshold, the third preset threshold, and the fourth preset threshold may all be determined according to different structures of the upper drain washing machine and prior knowledge, and the embodiment of the present application does not specifically limit the first preset time period, the second preset time period, the third preset time period, the first preset threshold, the second preset threshold, the third preset threshold, and the fourth preset threshold.

The embodiments described in the embodiments of the present application are for more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute a limitation to the technical solutions provided in the embodiments of the present application, and it is obvious to those skilled in the art that the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems with the evolution of technology and the emergence of new application scenarios.

It will be understood by those skilled in the art that the embodiments shown in the figures are not limiting, and may include more or fewer steps than those shown, or some of the steps may be combined, or different steps.

The above-described embodiments of the apparatus are merely illustrative, wherein the units illustrated as separate components may or may not be physically separate, i.e. may be located in one place, or may also be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.

One of ordinary skill in the art will appreciate that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof.

The terms "first," "second," "third," "fourth," and the like in the description of the application and the above-described figures, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

It should be understood that, in this application, "at least one" means one or more, "a plurality" means two or more. "and/or" for describing an association relationship of associated objects, indicating that there may be three relationships, e.g., "a and/or B" may indicate: only A, only B and both A and B are present, wherein A and B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of single item(s) or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.

The preferred embodiments of the present application have been described above with reference to the accompanying drawings, and the scope of the claims of the embodiments of the present application is not limited thereto. Any modifications, equivalents, and improvements that may occur to those skilled in the art without departing from the scope and spirit of the embodiments of the present application are intended to be within the scope of the claims of the embodiments of the present application.

Claims (10)

1. A water inlet control method of an upper drainage washing machine is characterized in that:

the upper drainage washing machine comprises:

a washing tub for storing a space of washing water;

a water inlet valve for controlling the washing water to enter the washing drum;

a water level sensor for detecting a water level of the washing water in the washing tub;

the inverted U-shaped drain pipe is connected with the water outlet of the washing drum, and when the tail end of the inverted U-shaped drain pipe is in a sealed state, a siphon drainage phenomenon is generated;

the alarm device is used for giving an alarm when the continuous siphon drainage phenomenon appears after water inflow is detected;

the water inflow control method comprises the following steps:

responding to a water inlet instruction, controlling the water inlet valve to be in an opening state within a first preset time period so as to inject water into the washing drum;

detecting whether a continuous siphoning drainage phenomenon occurs after water is fed through the water level sensor;

when the water level sensor detects that no continuous siphoning drainage phenomenon occurs after water is fed, controlling the water inlet valve to be opened until the water inlet stopping condition is met, and controlling the water inlet valve to be closed, wherein the water inlet stopping condition comprises that the water level of washing water in the washing drum reaches a target set water level or the water inlet duration reaches a set water inlet duration threshold;

when the water level sensor detects that the phenomenon of continuous siphon drainage occurs after water enters, the alarm device is controlled to give an alarm.

2. The method as claimed in claim 1, wherein said detecting whether the continuous siphon drainage phenomenon occurs after the water is supplied by the water level sensor comprises:

detecting whether a siphon drainage phenomenon occurs in a second preset time period through the water level sensor;

when the water level sensor detects that the siphon drainage phenomenon occurs in a second preset time period, the water level sensor detects whether the siphon drainage phenomenon occurs in a third preset time period;

when the water level sensor detects that the siphon drainage phenomenon occurs in a third preset time period, the continuous siphon drainage phenomenon is determined to occur after water enters.

3. The method of claim 2, wherein the detecting whether the siphon discharge phenomenon occurs within a second preset time period by the water level sensor comprises:

acquiring a first change value through the water level sensor, wherein the first change value is a change value of the water level frequency value of the washing water in the washing drum in a second preset time period;

when the first change value exceeds a first preset threshold value, determining that a siphon drainage phenomenon occurs in the second preset time period;

and when the first change value does not exceed the first preset threshold value, determining that no siphon drainage phenomenon occurs in the second preset time period.

4. The method of claim 3, wherein the obtaining a first variation value by the water level sensor comprises:

acquiring a maximum water level frequency value and a minimum water level frequency value in the second preset time period through the water level sensor;

subtracting the minimum water level frequency value from the maximum water level frequency value to obtain the first change value;

or;

acquiring a first water level frequency value and a second water level frequency value through the water level sensor, wherein the first water level frequency value is a water level frequency value corresponding to the starting moment of the second preset time period, and the second water level frequency value is a water level frequency value corresponding to the ending moment of the second preset time period;

and acquiring the first change value according to the first water level frequency value and the second water level frequency value.

5. The method of claim 2, wherein the detecting whether the siphon discharge phenomenon occurs within a second preset time period by the water level sensor comprises:

acquiring a first change rate value through the water level sensor, wherein the first change rate value is a change rate value of the water level frequency value of the washing water in the washing drum in unit time within a second preset time period;

when the first rate of change value exceeds a second preset threshold value, determining that a siphon drainage phenomenon occurs in the second preset time period;

and when the first rate of change value does not exceed the second preset threshold value, determining that no siphon drainage phenomenon occurs in the second preset time period.

6. The method of claim 5, wherein obtaining a first rate of change value via the water level sensor comprises:

acquiring a first change value through the water level sensor, wherein the first change value is a change value of the water level frequency value of the washing water in the washing drum in the second preset time period;

and acquiring the first change rate value according to the first change value and the second preset time period.

7. The method as claimed in claim 2, wherein the detecting whether the siphon discharge phenomenon occurs within a third preset time period by the water level sensor when the occurrence of the siphon discharge phenomenon within the second preset time period is detected by the water level sensor comprises:

when the water level sensor detects that a siphon drainage phenomenon occurs in a second preset time period, acquiring a second change value, wherein the second change value is a change value of the water level frequency value of the washing water in the washing drum in a third preset time period;

when the second variation value exceeds a third preset threshold value, determining that a siphon drainage phenomenon occurs in a third preset time period;

and when the second variation value does not exceed the third preset threshold value, determining that no siphon drainage phenomenon occurs in the third preset time period.

8. The method as claimed in claim 2, wherein the detecting whether the siphon discharge phenomenon occurs within a third preset time period by the water level sensor when the occurrence of the siphon discharge phenomenon within the second preset time period is detected by the water level sensor comprises:

when the water level sensor detects that a siphon drainage phenomenon occurs in a second preset time period, a second change rate value is obtained, wherein the second change rate value is a change value of the water level frequency value of the washing water in the washing drum in a third preset time period within unit time;

when the second rate of change value exceeds a fourth preset threshold value, determining that a siphon drainage phenomenon occurs in the third preset time period;

and when the second rate of change value does not exceed the fourth preset threshold value, determining that no siphon drainage phenomenon occurs in the third preset time period.

9. The method of claim 1, further comprising:

when the water level sensor detects that the siphon drainage phenomenon does not occur in the second preset time period or the siphon drainage phenomenon does not occur in the third preset time period, determining that the continuous siphon drainage phenomenon does not occur after water enters;

and controlling the water inlet valve to be opened until the water inlet stopping condition is met, and controlling the water inlet valve to be closed.

10. The method as claimed in claim 1, wherein after controlling the alarm device to alarm when the continuous siphon drainage phenomenon occurs after the water level sensor detects the water inflow, the method further comprises:

treating the siphon drainage phenomenon;

and after the treatment, returning to respond to a water inlet instruction, and controlling the water inlet valve to be in an open state within a first preset time period so as to inject water into the washing drum.

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