CN113564870A

CN113564870A - Control method, control device, clothes treatment equipment and computer readable storage medium

Info

Publication number: CN113564870A
Application number: CN202110875299.5A
Authority: CN
Inventors: 蒋佳伟; 张伟; 黄龙勤
Original assignee: Wuxi Filin Electronics Co Ltd
Current assignee: Wuxi Filin Electronics Co Ltd
Priority date: 2021-07-30
Filing date: 2021-07-30
Publication date: 2021-10-29
Anticipated expiration: 2041-07-30
Also published as: CN113564870B

Abstract

The application provides a control method, a control device, a clothes processing device and a computer readable storage medium, wherein the method comprises the following steps: determining that the clothes treatment equipment is in a non-working state, and acquiring a first water level in the barrel; acquiring a second water level in the barrel under the condition that the first water level is higher than a preset water level threshold value; and controlling a drain device of the laundry treating apparatus to be turned on to drain water in the tub in case it is determined that the laundry treating apparatus malfunctions based on the first water level and the second water level. So, when first water level is higher than and predetermines the water level threshold value, it has water to confirm that there is water in the staving, and the change condition of water level is confirmed through comparing first water level and second water level, can determine as early as possible whether clothing treatment facility breaks down to open drainage device immediately when confirming breaking down, and the water in the drainage staving in time, can reduce the probability that the trouble that leaks takes place as far as possible, get rid of the potential safety hazard, improve the security of using clothing treatment facility.

Description

Control method, control device, clothes treatment equipment and computer readable storage medium

Technical Field

The present application relates to the field of automation control technology, and relates to, but is not limited to, a control method, a control device, a laundry treatment apparatus, and a computer-readable storage medium.

Background

Clothes treatment equipment, such as washing machines, washing and drying integrated machines and the like, are indispensable household appliances in people's lives. In actual life, water inflow is not stopped due to the fact that a water inlet valve of the clothes treatment equipment breaks down, water can overflow from a barrel body to cause water leakage if a door body is not closed, articles are damaged if the water is light, economic losses are caused, and safety accidents can be caused if the water is heavy.

In order to solve the water leakage problem of the clothes treatment equipment, in the related technology, the water level in the barrel is obtained through a water level sensor, whether the water level exceeds a door seal or not is judged, if the water level exceeds the door seal, a drain valve is opened to drain water, and water leakage caused by overflow of the water from a door body is avoided. However, the detection accuracy of the water level sensor, the accuracy of the chip crystal frequency, and the ambient temperature all affect the detected water level, and there is a possibility that the actual water level is higher than the detected water level, resulting in water leakage.

Disclosure of Invention

In view of the above, embodiments of the present application provide a control method, a control device, a laundry processing apparatus, and a computer-readable storage medium.

The technical scheme of the embodiment of the application is realized as follows:

the embodiment of the application provides a control method, which is applied to clothes treatment equipment and comprises the following steps:

determining that the clothes treatment equipment is in a non-working state, and acquiring a first water level in a barrel of the clothes treatment equipment;

acquiring a second water level in the barrel under the condition that the first water level is determined to be higher than a preset water level threshold;

and controlling a drain device of the laundry treating apparatus to be turned on to drain water in the tub in case it is determined that the laundry treating apparatus malfunctions based on the first water level and the second water level.

In some embodiments, the determining that the first water level is higher than the preset water level threshold, obtaining a second water level in the tub includes:

determining whether the first water level is lower than a critical water level under the condition that the first water level is higher than a preset water level threshold, wherein the critical water level is the lowest water level at which water can overflow from the barrel body;

controlling a water level detection device to detect a water level parameter under the condition that the first water level is lower than the critical water level, wherein the water level parameter comprises at least one of a water level frequency value and a water level weight value;

a second water level is determined based on the water level parameter.

In some embodiments, the method further comprises:

reacquiring the first water level in the tub of the laundry treatment apparatus if the first water level is lower than or equal to the preset water level threshold;

controlling a drain device of the laundry treating apparatus to be opened to drain water within a tub in a case that the first water level is higher than or equal to the critical water level.

In some embodiments, the method further comprises:

determining a water level change value according to the first water level and the second water level;

under the condition that the water level change value is larger than a first preset threshold, acquiring the duration of the water level change value larger than the first preset threshold;

and determining that the water inlet fault occurs in the clothes treatment equipment under the condition that the duration reaches a preset duration threshold.

In some embodiments, the method further comprises:

and determining that the water drainage fault occurs in the clothes treatment device under the condition that the water level variation value is less than a second preset threshold value.

In some embodiments, the method further comprises:

and under the condition that the duration does not reach the preset duration threshold, reacquiring a second water level in the barrel.

In some embodiments, the method further comprises:

generating corresponding fault information according to the fault of the clothes processing equipment;

controlling an alarm device to output alarm information corresponding to the fault information, and/or

And sending a prompt message to a terminal which is connected with the clothes processing equipment, wherein the prompt message at least carries the fault information.

The embodiment of the application provides a control device, is applied to clothing processing apparatus, the device includes:

the first acquisition module is used for determining that the clothes treatment equipment is in a non-working state and acquiring a first water level in a barrel of the clothes treatment equipment;

the first obtaining module is further configured to obtain a second water level in the barrel when it is determined that the first water level is higher than a preset water level threshold;

and the first control module is used for controlling a drainage device of the clothes treatment equipment to be opened to drain water in the barrel body under the condition that the clothes treatment equipment is determined to be in fault based on the first water level and the second water level.

An embodiment of the present application provides a laundry treatment apparatus, including:

a memory for storing executable instructions;

and the processor is used for realizing the steps of the control method when executing the executable instructions stored in the memory.

The embodiment of the application provides a computer-readable storage medium, wherein computer-executable instructions are stored in the computer-readable storage medium and configured to execute the steps of the control method.

The embodiment of the application provides a control method, a control device, a clothes processing device and a computer readable storage medium, wherein the method comprises the following steps: when the clothes treatment equipment is in a non-working state, acquiring a first water level in a barrel of the clothes treatment equipment; judging whether the first water level is higher than a preset water level threshold value or not, and acquiring a second water level in the barrel again under the condition that the first water level is higher than the preset water level threshold value; determining whether the laundry treating apparatus malfunctions based on the first water level and the second water level, and controlling a drain of the laundry treating apparatus to be turned on to drain water in the tub when it is determined that the laundry treating apparatus malfunctions. So, when first water level is higher than predetermineeing the water level threshold value, exist water in the definite staving, through the change condition of comparing first water level and second water level definite water level, can determine as early as possible whether clothing treatment facility breaks down to open drainage device immediately when confirming to break down, and the water in the drainage staving in time, can reduce the probability that the trouble that leaks takes place as far as possible, get rid of the potential safety hazard, improve the security of using clothing treatment facility.

Drawings

In the drawings, which are not necessarily drawn to scale, like reference numerals may describe similar components in different views. The drawings illustrate generally, by way of example, but not by way of limitation, various embodiments discussed herein.

Fig. 1 is a schematic flow chart of an implementation of a control method provided in an embodiment of the present application;

fig. 2 is a schematic flowchart of another implementation of the control method according to the embodiment of the present application;

fig. 3 is a schematic flowchart of another implementation of the control method according to the embodiment of the present application;

fig. 4 is a schematic flowchart of another implementation of the control method according to the embodiment of the present application;

fig. 5 is a schematic structural diagram of a control device according to an embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of a laundry treatment apparatus according to an embodiment of the present application.

Detailed Description

In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be described in further detail with reference to the attached drawings, the described embodiments should not be considered as limiting the present application, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

In the following description, reference is made to "some embodiments" which describe a subset of all possible embodiments, but it is understood that "some embodiments" may be the same subset or different subsets of all possible embodiments, and may be combined with each other without conflict.

In the following description, references to the terms "first \ second \ third" are only to distinguish similar objects and do not denote a particular order, but rather the terms "first \ second \ third" are used to interchange specific orders or sequences, where appropriate, so as to enable the embodiments of the application described herein to be practiced in other than the order shown or described herein.

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.

Based on the potential safety hazard problem of clothes treatment equipment in the related art, such as a washing machine, a washing and drying integrated machine, a dish washing machine and the like, the embodiment of the application provides a control method applied to the clothes treatment equipment. The method provided by the embodiment of the present application can be implemented by a computer program, and when the computer program is executed, each step in the control method provided by the embodiment of the present application is completed. In some embodiments, the computer program may be executed by a control device in a laundry treatment apparatus. Fig. 1 is a schematic flow chart of an implementation of a control method provided in an embodiment of the present application, and is applied to a clothes treatment apparatus. As shown in fig. 1, the control method includes the steps of:

step S101, determining that the clothes treatment equipment is in a non-working state, and acquiring a first water level in a barrel of the clothes treatment equipment.

The control method of the embodiment of the application is applied to clothes treatment equipment, such as household appliances like washing machines, washing and drying integrated machines and dish washing machines. The following description will be given taking a laundry treating apparatus as an example of a washing machine.

In practical applications, when the washing machine is in a non-operating state, i.e., a standby state or a power-off state, the water inlet device of the washing machine may malfunction, resulting in no more water being supplied. Here, it should be noted that, when the user presses the "power" key on the control panel of the washing machine, the washing machine is in a standby state, and when the user does not press the "power" key or presses the "power" key again in the standby state, the washing machine is in a shutdown state, and the control device of the washing machine is powered on. The washing machine is in a power-off state different from a power-off state.

When the washing machine is in a non-working state, and the water level in the barrel body exceeds the height of the lowest point of the door body, if the door body is in an opening state, water can overflow from the barrel body and flow to the ground, so that articles in a home are damaged slightly, economic loss is caused, and safety accidents such as electric shock and the like are possibly caused seriously. In order to solve the problem in the related art, the water level in the barrel is detected through a water level sensor, whether the water level in the barrel exceeds the lowest point of the door body or not is judged, and if the water level in the barrel exceeds the lowest point of the door body, a drain valve is opened to drain water. Although the related art can prevent water from overflowing from the door body to some extent, when the water level sensor has some faults, the water level sensor can still detect the water level parameter value, but the detected water level parameter value may deviate from the actual value. For example, the long-time water retention in the barrel body can cause the precision of the air pressure sensor to deviate, or the precision of the chip crystal oscillator frequency to deviate, or the ambient temperature affects the atmospheric pressure to cause the precision of the air pressure sensor to deviate, and the conditions can cause the detected water level parameter value to be smaller than the actual value, namely the actual water level exceeds the lowest point of the door body, but the water level parameter detected by the water level sensor does not reach the water level parameter of the corresponding water level of the lowest point of the door body, so that the water overflows from the barrel body.

In order to solve the problem that water in the barrel body overflows due to the precision deviation of water level sensors and chip crystal oscillator frequency and the influence of environmental temperature in the related technology, in the embodiment of the application, when the clothes treatment equipment is determined to be in a non-working state, the water level detection device is controlled to detect a first water level parameter in the barrel body, and the first water level is obtained based on the first water level parameter.

In one implementation, the water level detecting device may be a water level sensor, such as an air pressure sensor, and the acquiring of the first water level by using the first water level parameter detected by the water level detecting device may be: the water level sensor senses a first water level frequency value based on the pressure of water and sends the first water level frequency value to a control device of the clothes treatment equipment, the control device inquires corresponding water level in a first relation table prestored in a storage space of the clothes treatment equipment based on the first water level frequency value to obtain first water level, and the first relation table comprises the water level frequency value and the water level with corresponding relation.

In another implementation manner, the water level detecting device may be a weight sensor, and the acquiring of the first water level by using the first water level parameter detected by the water level detecting device may be implemented as: the weight sensor senses a first water level weight value based on the gravity of water, and sends the first water level weight value to the control device of the clothes treatment equipment, the control device inquires a corresponding water level in a second relation table prestored in a storage space of the clothes treatment equipment based on the first water level weight value to obtain a first water level, and the second relation table comprises the water level weight value and the water level with corresponding relations.

And step S102, acquiring a second water level in the barrel under the condition that the first water level is determined to be higher than a preset water level threshold.

After the first water level is obtained according to the step S101, it is determined whether the first water level is higher than a preset water level threshold to determine whether water exists in the tub. When the first water level is higher than the preset water level threshold value, water is considered to exist in the barrel body, and the water level detection device is controlled again to detect a second water level parameter in the barrel body to obtain a second water level. Whether the water level in the barrel body changes or not is determined by comparing the water levels in the barrel body at different moments, namely comparing the first water level with the second water level.

In the embodiment of the application, the preset water level threshold value can be the lowest water level at which the water level detection device can detect that water exists in the barrel body; or a preset lower water level, such as a heating protection water level preset according to the position of the heating pipe; any other water level not higher than the lowest point of the door body can be adopted.

Step S103, controlling a drainage device of the laundry treating apparatus to be opened to drain water in the tub in case it is determined that the laundry treating apparatus is out of order based on the first water level and the second water level.

Under the condition that the washing machine is in a non-working state, if the washing machine has no water inlet fault and no water drainage fault, the water level in the barrel body is unchanged, and the first water level and the second water level obtained twice are the same; if the washing machine has water inlet faults (such as water inlet valve faults), the water level in the barrel body rises due to the fact that water is not fed, and the second water level obtained for the second time is higher than the first water level obtained for the first time; if the washing machine has a drainage fault (such as a drainage valve has a fault), the water level in the barrel body is reduced due to drainage, and the second water level obtained for the second time is lower than the first water level obtained for the first time. Based on this, in the embodiment of the application, after the first water level and the second water level are obtained, whether the water level in the tub changes is determined by comparing the water levels at different times, and when it is determined that the water level in the tub changes, it is determined that the laundry treatment apparatus malfunctions.

Since the control device is powered when the clothes treatment equipment is in a non-working state, other devices of the clothes treatment equipment can be controlled to work. When the clothes treatment equipment is determined to be in fault, the drainage device is controlled to be started to empty water in the barrel body, and the water in the barrel body can be prevented from overflowing. The drain means here may be a drain valve.

In the embodiment of the present application, if the water inlet device and the water outlet device of the laundry treating apparatus are not in failure, even if the water level detecting device is in failure, the deviation values of the two measurements are equal, that is, the deviation between the actual value of the first water level and the measured value of the first water level obtained at the first time is equal to the deviation between the actual value of the second water level and the measured value of the second water level obtained at the second time. Under same environment, when water level detection device did not change, its precision deviation was unchangeable, and first water level of contrast and second water level are equivalent to the first moment water level actual value of contrast and the second moment water level actual value, consequently can offset the deviation, prevent the problem that the staving normal water spilled over when solving water level detection device and appearing the deviation.

According to the control method provided by the embodiment of the application, when the clothes treatment equipment is determined to be in a non-working state, the first water level in the barrel of the clothes treatment equipment is obtained; acquiring a second water level in the barrel under the condition that the first water level is higher than a preset water level threshold value; and controlling a drain device of the laundry treating apparatus to be turned on to drain water in the tub in case it is determined that the laundry treating apparatus malfunctions based on the first water level and the second water level. So, when first water level is higher than predetermineeing the water level threshold value, exist water in the definite staving, through the change condition of comparing first water level and second water level definite water level, can determine as early as possible whether clothing treatment facility breaks down to open drainage device immediately when confirming to break down, and the water in the drainage staving in time, can reduce the probability that the trouble that leaks takes place as far as possible, get rid of the potential safety hazard, improve the security of using clothing treatment facility.

On the basis of the embodiment shown in fig. 1, an embodiment of the present application further provides a control method applied to a clothes treatment apparatus, fig. 2 is a schematic flow chart of another implementation of the control method provided in the embodiment of the present application, and as shown in fig. 2, the control method includes the following steps:

step S201, determining that the clothes treatment equipment is in a non-working state, and acquiring a first water level in a barrel of the clothes treatment equipment.

Here, the first water level parameter may be detected by the water level detecting means, and the first water level may be determined according to the first water level parameter. The water level detection device can be a water level sensor, and the control device determines a first water level through a first water level frequency value detected by the water level sensor; the water level detecting device can also be a weight sensor, and the control device determines the first water level through a first water level weight value detected by the weight sensor.

The following steps S202 to S205 are an implementation of the step S102 "obtaining the second water level in the tub when the first water level is determined to be higher than the preset water level threshold".

Step S202, judging whether the first water level is higher than a preset water level threshold value.

When the first water level is higher than the preset water level threshold, indicating that water exists in the barrel body, and then entering step S203; and under the condition that the first water level is lower than or equal to the preset water level threshold, the water is not in the barrel body, and the step S201 is returned to continue the detection.

In step S203, it is determined whether the first water level is lower than the critical water level.

Under the condition that the first water level is lower than the critical water level, it is indicated that water exists in the barrel body, but the water level is lower than the height of the lowest point of the door body (namely the height of the lowest point where the water can overflow from the door body), at the moment, the water in the barrel body cannot overflow from the door body, and then, the step S204 is carried out to further judge whether the water level is changed; when the first water level is higher than or equal to the critical water level, which indicates that the water in the bucket body exceeds the height of the lowest point of the door body, the water in the bucket body may overflow from the door body at the moment, and then the step S207 is entered, and the drainage device is immediately opened for drainage.

The critical water level is the lowest water level at which water can overflow from the barrel body, the critical water level is determined based on the lowest point of the door body, and after the critical water level is determined, the critical water level is stored in the storage space so as to judge the water level in the following process.

And step S204, controlling the water level detection device to detect the water level parameter.

The water level parameter includes at least one of a water level frequency value and a water level weight value.

In step S205, a second water level is determined based on the water level parameter.

In the embodiment of the present application, for the purpose of differentiation, the water level parameter detected when the first water level is obtained in step S201 is used as the first water level parameter, and the water level parameter detected when the second water level is obtained in step S204 is used as the second water level parameter.

In order to avoid different measurement accuracy deviations of different detection devices, in the embodiment of the application, a first water level parameter detected when a first water level is obtained and a second water level parameter detected when a second water level is obtained, wherein the water level detection devices are the same device, that is, when the first water level parameter is a first water level frequency value detected by a water level sensor, the second water level parameter is a second water level frequency value detected by the water level sensor; when the first water level parameter is a first water level weight value detected by the weight sensor, the second water level parameter is a second water level weight value detected by the weight sensor.

Step S206, determining whether the laundry treating apparatus malfunctions based on the first water level and the second water level.

When it is determined that the laundry treating apparatus is out of order based on the first water level and the second water level, in order to prevent an overflow condition from occurring at this time, proceeding to step S207; when it is determined that the laundry treating apparatus is not malfunctioning based on the first water level and the second water level, it may be that the malfunction actually occurs, but since the time interval is short and the difference between the first water level and the second water level is small, it may not be detected that the malfunction has occurred or it may not actually occur, and thus it is necessary to return to step S204 for continuous detection.

Step S207, controlling a drain of the laundry treating apparatus to be turned on to drain the water in the tub.

According to the control method provided by the embodiment of the application, under the condition that the first water level is higher than the preset water level threshold value, whether the first water level is lower than the critical water level is judged firstly, so that when the water in the barrel body exceeds the height of the lowest point of the door body, the drainage device is started immediately for drainage, and the water is drained as early as possible to reduce the overflowing water amount. When the water in the barrel body does not exceed the height of the lowest point of the door body, whether the clothes treatment equipment breaks down or not can be determined as early as possible by determining the change condition of the water level, the drainage device is immediately started when the fault is determined, the water in the barrel body is drained, the probability of water leakage fault occurrence can be reduced as far as possible, potential safety hazards are eliminated, and the safety of the clothes treatment equipment is improved.

In some embodiments, the step S206 of determining whether the laundry treating apparatus malfunctions based on the first water level and the second water level in the embodiment shown in fig. 2 may be implemented by:

in step S2061, a water level variation value is determined according to the first water level and the second water level.

In the embodiment of the application, the water level change value can be determined according to the acquired first water level and the acquired second water level, and the difference value between the second water level and the first water level is determined as the water level change value. When the water level rises, the second water level is higher than the first water level, and the water level change value is a positive value; when the water level is lowered, the second water level is lower than the first water level, and the water level variation value is a negative value.

In step S2062, it is determined whether the water level variation value is greater than a first preset threshold.

The first preset threshold is a preset value capable of representing the rise of the water level. The first predetermined threshold is a predetermined positive number. Comparing the water level variation value with a first preset threshold value, and when the water level variation value is greater than the first preset threshold value, indicating that the water level in the barrel body rises, then entering step S2063; when the water level variation value is not greater than the first preset threshold, indicating that the water level in the tub does not rise, it may be determined that the water inlet fault does not occur in the laundry treating apparatus, and the process continues to step S2066, in which it is determined whether the water level falls to determine whether the water discharge fault occurs.

In this embodiment of the application, the first preset threshold may be 5mm (millimeter), and when the difference between the second water level and the first water level is greater than 5mm, step S2063 is performed.

Step S2063, a duration of the water level variation value being greater than the first preset threshold is obtained.

Step S2064, determining whether the duration reaches a preset duration threshold.

When the duration is greater than or equal to the preset duration threshold, that is, the water level change value in the barrel body is always greater than the first preset threshold during the duration, the measurement error can be eliminated, and at this time, it can be determined that the water level in the barrel body is actually rising, and the step S2065 is entered; when the duration is less than the preset duration threshold, it cannot be determined whether the water level in the barrel body actually rises, and the step S204 is returned to continue the detection until the water level variation value is greater than the first preset threshold and the duration reaches the preset duration threshold.

In this embodiment of the application, the preset duration threshold may take any value between 1s (second) and 5s, for example, take 2 s.

Step S2065, determining that the water inlet fault of the laundry treating apparatus occurs.

In some embodiments, when it is determined that the water inlet malfunction of the laundry treating apparatus occurs, in order to avoid overflow caused by the water level rising in the tub, the steps of: detecting the state of a door body, wherein the state of the door body comprises an opening state and a closing state; when the state of the door body is determined to be the opening state, the alarm device is controlled to output alarm information, the alarm information is used for prompting a user that water inlet faults occur to the clothes treatment equipment and the door body is in the opening state, the risk of water overflow exists, the user can be prompted to close the door body as soon as possible through the alarm information, and the amount of water overflowing is reduced as far as possible. After determining that the water inlet fault occurs in the laundry treating apparatus, the step S207 is continuously performed to drain water.

In step S2066, it is determined whether the water level variation value is smaller than a second preset threshold.

The second predetermined threshold is a predetermined value capable of indicating a drop in water level. The second predetermined threshold is a predetermined negative number. Comparing the water level variation value with a second preset threshold value, and when the water level variation value is smaller than the second preset threshold value, indicating that the water level in the barrel body is lowered, then entering step S2067; when the water level variation value is greater than or equal to the second preset threshold value, which indicates that the water level in the tub does not rise or fall, it may be determined that the water inlet fault or the water discharge fault does not occur in the laundry treatment apparatus, and the detection is continued by returning to step S204.

In this embodiment of the application, the second preset threshold may be set to-5 mm, and when the difference between the second water level and the first water level is smaller than-5 mm, the step S2067 is performed.

Step S2067, determining that the laundry treating apparatus has a drainage failure.

After determining that the drainage fault occurs in the clothes treatment apparatus, the step S207 is continuously performed to control the drainage device to be opened to drain the water in the tub, so that the drainage is not needed when the user maintains the drainage device, and the maintenance time is shortened.

According to the control method provided by the embodiment of the application, whether the water level changes is judged through the first water level and the second water level, when the water level changes, the failure of the clothes treatment equipment is determined, and water drainage is started; and whether a water inlet fault or a water drainage fault occurs is further determined according to the water level change value, so that maintenance personnel can maintain the water inlet fault or the water drainage fault conveniently, the probability of water leakage fault occurrence is reduced as much as possible, potential safety hazards are eliminated, and the safety of using the clothes treatment equipment is improved.

In other embodiments, after the control device receives the water level parameter detected by the water level detection device, it is not necessary to obtain the corresponding water level based on the water level parameter, and the control device may determine the variation value of the water level parameter directly according to the first water level parameter and the second water level parameter detected by the water level detection device, and determine whether the water level in the tub actually rises based on the variation value of the water level parameter, at this time, step S206 "determine whether the laundry treatment apparatus is in failure based on the first water level and the second water level" in the embodiment shown in fig. 2 may be implemented by:

in step S2061', a variation value of the water level parameter is determined according to the first water level parameter and the second water level parameter.

In this implementation, the water level parameter includes at least one of a water level frequency value and a water level weight value.

When the water level detection device is a water level sensor, the first water level parameter is a first water level frequency value, and the second water level parameter is a second water level frequency value. Here, the water level sensor may be an air pressure sensor. The higher the water level in the barrel is, the higher the pressure of water on the water level sensor is, the larger the inductance value of an inductance coil in the water level sensor is, the smaller the parallel resonance frequency (namely, the water level frequency value) of the inductance and the capacitance is, and the smaller the water level frequency value received by the control device is. Determining a variation value of the water level parameter according to the first water level parameter and the second water level parameter, that is, determining a variation value of the water level frequency according to the first water level frequency value and the second water level frequency value, may be implemented as: and determining the difference value of the first water level frequency value and the second water level frequency value as the change value of the water level frequency. When the water level rises, the water level frequency value is reduced, the first water level frequency value is larger than the second water level frequency value, and the change value of the water level parameter is a positive number. When the water level is reduced, the water level frequency value is increased, the first water level frequency value is smaller than the second water level frequency value, and the change value of the water level parameter is a negative number.

When the water level detection device is a weight sensor, the first water level parameter is a first water level weight value, and the second water level parameter is a second water level weight value. The higher the water level in the barrel is, the larger the gravity of the water to the weight sensor is, the larger the inductance of the inductance coil in the weight sensor is, and the larger the water level weight value received by the control device is. According to first water level parameter and second water level parameter determination water level parameter's change value, according to the change value of first water level weight value and second water level weight value determination water level weight promptly, can realize as: and determining the difference value between the second water level weight value and the first water level weight value as the change value of the water level weight. When the water level rises, the water level weight value is increased, the first water level weight value is smaller than the second water level weight value, and the change value of the water level parameter is a positive number. When the water level descends, the water level weight value is reduced, the first water level weight value is larger than the second water level weight value, and the change value of the water level parameter is a negative number.

Step S2062', it is determined whether the variation value of the water level parameter is greater than a third preset threshold.

The third preset threshold is a preset value capable of representing that the water level parameter changes. The third predetermined threshold is a predetermined positive number. Comparing the variation value of the water level parameter with a third preset threshold, and when the variation value of the water level parameter is greater than the third preset threshold, indicating that the water level in the barrel body rises, then entering step S2063'; when the variation value of the water level parameter is less than or equal to the third preset threshold, indicating that the water level in the tub does not rise, it may be determined that the water inlet fault does not occur in the laundry treating apparatus, and the step S2066' is continuously performed to determine whether the water level falls to determine whether the water discharge fault occurs.

In this embodiment of the application, when the variation value of the water level parameter is a variation value of the water level frequency, the third preset threshold may be set to any value between 100Hz (hertz) and 200Hz, for example, set to 150 Hz. When the change value of the water level parameter is the change value of the water level weight, the third preset threshold may take any value between 0.5kg (kilogram) and 1.5kg, for example, take 1 kg.

In step S2063', the duration that the variation value of the water level parameter is greater than the third preset threshold is obtained.

Step S2064', determining whether the duration reaches the preset duration threshold.

When the duration is greater than or equal to the preset duration threshold, that is, the variation value of the water level parameter is always greater than the third preset threshold during the duration, the measurement error can be eliminated, and at this time, it can be determined that the water level in the barrel body is actually rising, and the process proceeds to step S2065'; and when the duration is less than the preset duration threshold, whether the water level in the barrel body actually rises or not cannot be determined, returning to the step S204 to continue the detection until the variation value of the water level parameter is greater than a third preset threshold and the duration reaches the preset duration threshold.

In this embodiment of the application, the preset duration threshold may take any value between 1s and 5s, for example, take 2 s.

Step S2065', it is determined that the water inlet malfunction occurs in the laundry treating apparatus.

After determining that the water inlet fault of the clothes treatment device occurs, the flow proceeds to step S207 to drain water.

Step S2066', it is determined whether the variation value of the water level parameter is smaller than a fourth preset threshold.

The fourth preset threshold is a preset value capable of representing that the water level parameter changes. The fourth predetermined threshold is a predetermined negative number. Comparing the variation value of the water level parameter with a fourth preset threshold value, and entering step S2067' when the variation value of the water level parameter is smaller than the fourth preset threshold value, indicating that the water level in the barrel body is reduced; when the variation value of the water level parameter is greater than or equal to the fourth preset threshold value, which indicates that the water level in the tub does not decrease, it may be determined that the water inlet fault and the water discharge fault of the laundry treatment apparatus do not occur, and the step S204 is returned to continue the detection.

In this embodiment of the application, when the variation value of the water level parameter is a variation value of the water level frequency, the fourth preset threshold may be set to any value between-100 Hz and-200 Hz, for example, set to-150 Hz. When the change value of the water level parameter is the change value of the water level weight, the fourth preset threshold value can be any value between-0.5 kg and-1.5 kg, such as-1 kg.

Step S2067', it is determined that the laundry treating apparatus has a drainage malfunction.

After determining that the drainage fault occurs in the clothes treatment device, step S207 is executed to control the drainage device to be opened to drain water in the tub, so that the drainage device does not need to be drained again when a user maintains the drainage device, and the maintenance time is shortened.

According to the control method provided by the embodiment of the application, whether the water level parameter changes or not is judged through the first water level parameter and the second water level parameter, and when the water level parameter changes, the failure of the clothes treatment equipment is determined, and water drainage is started; and furthermore, whether a water inlet fault or a water drainage fault occurs is determined according to the change value of the water level parameter, so that maintenance personnel can maintain the water inlet fault or the water drainage fault conveniently, the probability of water leakage fault is reduced as much as possible, potential safety hazards are eliminated, and the safety of using the clothes treatment equipment is improved.

Based on the above embodiments, the present application further provides a control method applied to a clothes treatment apparatus, fig. 3 is a schematic flow chart of another implementation of the control method provided by the present application, as shown in fig. 3, the control method includes the following steps:

step S301, determining that the clothes treatment apparatus is in a non-working state, controlling the water level detection device to detect a first water level parameter, and determining a first water level based on the first water level parameter.

The first water level parameter includes at least one of a first water level frequency value and a first water level weight value.

Step S302, determining whether the first water level is higher than a preset water level threshold.

When the first water level is higher than the preset water level threshold, indicating that water exists in the barrel body, and then entering step S303; and under the condition that the first water level is lower than or equal to the preset water level threshold, the water is not in the barrel body, and the step S301 is returned to continue the detection.

Step S303, determining whether the first water level is lower than a critical water level.

The critical water level is the lowest water level at which water can overflow from the tub. Under the condition that the first water level is lower than the critical water level, the fact that water exists in the barrel body is indicated, but the water level is lower than the lowest point of the door body, at the moment, the water in the barrel body cannot overflow from the door body, and at the moment, the step S304 is carried out to further judge whether the water level is changed; when the first water level is higher than or equal to the critical water level, which indicates that the water in the tub body exceeds the height of the lowest point of the door body, the water in the tub body may overflow from the door body, and then the step S312 is performed to drain the water.

And step S304, controlling the water level detection device to detect a second water level parameter and determining a second water level based on the second water level parameter.

The second water level parameter includes at least one of a second water level frequency value and a second water level weight value.

In step S305, a water level variation value is determined according to the first water level and the second water level.

Step S306, determining whether the water level variation value is greater than a first preset threshold.

The first preset threshold is a preset value capable of representing the rise of the water level. The first predetermined threshold is a predetermined positive number. Comparing the water level variation value with a first preset threshold value, and when the water level variation value is greater than the first preset threshold value, indicating that the water level in the barrel body rises, then entering step S307; when the water level variation value is not greater than the first preset threshold, indicating that the water level in the tub does not rise, it may be determined that the water inlet fault does not occur in the laundry treating apparatus, and the process continues to step S310, where it is determined whether the water level falls to determine whether the water discharge fault occurs.

Step S307, obtaining a duration of the water level variation value greater than the first preset threshold.

Step S308, judging whether the duration reaches a preset duration threshold.

When the duration is greater than or equal to the preset duration threshold, that is, the water level change value in the barrel body is always greater than the first preset threshold during the duration, the measurement error can be eliminated, and at this time, it can be determined that the water level in the barrel body has actually risen, and the process proceeds to step S309; when the duration is less than the preset duration threshold, it cannot be determined whether the water level in the barrel body actually rises, and the step S304 is returned to continue the detection until the water level variation value is greater than the first preset threshold and the duration reaches the preset duration threshold.

Step S309, it is determined that the water inlet malfunction of the laundry treating apparatus occurs.

After the water inlet fault occurs in the laundry treating apparatus, step S312 is performed to drain water.

Step S310, determining whether the water level variation value is smaller than a second preset threshold.

The second predetermined threshold is a predetermined value capable of indicating a drop in water level. The second predetermined threshold is a predetermined negative number. Comparing the water level variation value with a second preset threshold value, and entering step S311 when the water level variation value is smaller than the second preset threshold value and indicates that the water level in the barrel body is lowered; when the water level variation value is greater than or equal to the second preset threshold value, which indicates that the water level in the tub does not rise or fall, it may be determined that the water inlet fault or the water discharge fault does not occur in the laundry treating apparatus, and the detection is continued by returning to step S304.

In step S311, it is determined that the drainage malfunction of the laundry treating apparatus occurs.

In step S312, the drainage device of the laundry treating apparatus is controlled to be turned on to drain the water in the tub.

Step S313, generating corresponding fault information according to the fault occurred in the laundry treating apparatus.

When the fault of the clothes treatment equipment is a water inlet fault, generating fault information corresponding to the water inlet fault, such as generating a water inlet fault code 'E1'; when the malfunction of the laundry treating apparatus is a drainage malfunction, malfunction information corresponding to the drainage malfunction is generated, such as a drainage malfunction code "E2".

And step S314, controlling the alarm device to output alarm information corresponding to the fault information.

In this application embodiment, when clothing treatment facility broke down, control alarm device output fault information corresponding alarm information to the user in time learns clothing treatment facility broke down and corresponds different alarm information according to different trouble, learns what kind of trouble takes place, in time maintains based on the trouble that takes place, reduces the probability that the trouble that leaks takes place as far as possible, gets rid of the potential safety hazard, improves the security of using clothing treatment facility.

In the embodiment of the application, the alarm information may include at least one of an alarm sound, an alarm prompt message, and an alarm fault code. The alarm device controlling the laundry treating apparatus to output the alarm information may include: controlling a sound production module of the alarm device to produce alarm sound; and/or controlling a first display module of the alarm device to display alarm prompt information; and/or controlling a second display module of the alarm device to display an alarm fault code. The sounding module can be a sound output module such as a loudspeaker, the alarm sound can be intermittent buzzer sound, and the interruption time of the alarm sound corresponding to different faults can be different; the first display module may be an indicator Light such as a Light Emitting Diode (LED) Light, the alarm prompt information may be LED Light flashing, and the flashing frequencies of the alarm prompt information corresponding to different faults may be different; the second display module may be an output module such as a digital tube capable of displaying codes or numbers, and the alarm fault code may be a fault code, such as preset fault codes "E1" and "E2" corresponding to a fault, according to which a user may determine that a fault occurring in the laundry treating apparatus is: water inlet failure and water discharge failure.

And step S315, sending a prompt message to a terminal which is connected with the clothes treatment equipment.

The prompt message at least carries fault information, so that a user can check the terminal to know what kind of fault occurs in the clothes treatment equipment.

In some embodiments, when the laundry treating apparatus can be connected with the terminal and transmit information, the laundry treating apparatus is controlled to generate a prompt message to the terminal, such as a sending module of the alarm device is controlled to send an alarm fault code to the terminal.

In practical application, the prompt message may also carry correction information on how to eliminate the fault, the correction information may be stored in a storage space of the laundry processing device, corresponding correction information is obtained from the storage space according to the fault information, and the fault information and the corresponding correction information are carried in the prompt message and sent to the terminal. Or, when the storage space of the clothes treatment device does not store the correction information corresponding to the fault information, the clothes treatment device or the terminal can obtain the correction information from the server according to the fault information, so that the user can know that the clothes treatment device is in fault in time and maintain the clothes treatment device in time based on the fault.

The control method that this application embodiment provided, reduce the probability that the trouble that leaks takes place, get rid of the potential safety hazard, when improving the security of using clothing treatment facility, control alarm device output fault information corresponding alarm information, further send prompt message to terminal, so that the user in time learns clothing treatment facility breaks down and corresponds different alarm information according to different trouble, learn what kind of trouble takes place, in time maintain based on the trouble that takes place, further reduce the probability that the trouble that leaks takes place, in time maintain when taking place into water trouble, the using water wisely.

Next, an exemplary application of the embodiment of the present application in a practical application scenario will be described.

In the drum washing machine, the water inlet valve is damaged occasionally in the market, so that water is not supplied, and if the door is not locked, water can overflow from the barrel, and the user loss is caused. The washing machine can detect whether the water level exceeds the door seal or not, and the water is automatically drained when the water level exceeds the door seal, but the deviation of the water level sensor, the crystal oscillator frequency deviation of the chip and different environmental temperatures have influence on the water level detection, and the actual water level is higher than the detected water level possibly, so that the water cannot be drained in time when water leakage occurs.

In order to solve the problem of water leakage of the washing machine caused by accuracy deviation of the water level sensor, an embodiment of the present application provides a drum washing machine with a water level monitoring function, fig. 4 is a schematic diagram of another implementation flow of a control method provided by the embodiment of the present application, and as shown in fig. 4, the method includes the following steps:

in step S401, a first water level is detected.

And under the shutdown state or the standby state, the control device controls the water level sensor to detect a first water level frequency value in the barrel body, and determines the first water level according to the first water level frequency value.

Step S402, judging whether the first water level is higher than the heating protection water level.

When the first water level is detected to exceed the heating protection water level, the step S402 is carried out; when the first water level is detected not to exceed the heating protection water level, the step S401 is returned to continue the detection.

Here, the heating protection water level L0 may be an extremely low water level, such as a water level that may be considered to be just under the heating pipe.

Step S403, determining whether the first water level is higher than the water level of the door seal.

The door sealing water level refers to the water level L1 at the lowest point of the door body. When the first water level is higher than the heating protection water level L0, continuously judging whether the first water level is higher than the door seal water level L1, and when the first water level is higher than the door seal water level L1, entering step S408; when the first water level is not higher than the gate seal water level L1, the process proceeds to step S404.

In step S404, a second water level is detected.

In step S405, it is determined whether the water level rises based on the first water level and the second water level.

When it is determined that the water level in the tub rises based on the first water level and the second water level, proceeding to step S406; when it is determined that the water level in the tub does not rise based on the first and second water levels, it returns to step S404.

Step S406, determining whether the water level frequency difference is greater than a preset threshold.

When the water level frequency difference is larger than the preset threshold, determining that a water inlet fault occurs, and then entering step S407; when it is determined that the water level in the tub rises based on the first water level and the second water level, but the difference between the water level frequencies is less than or equal to the preset threshold, it is not yet determined whether a water inlet fault occurs, and at this time, the step S404 is returned to continue the detection.

Here, the water level frequency difference is a difference between a first water level frequency value corresponding to the first water level and a second water level frequency value corresponding to the second water level. The preset threshold value may be 150 Hz.

Step S407, determining whether the duration of the water level frequency difference value greater than the preset threshold reaches the preset duration threshold.

When the duration that the water level frequency difference value is greater than the preset threshold reaches the preset duration threshold, determining that water drainage is needed, and then entering step S408; when the duration of the water level frequency difference value larger than the preset threshold does not reach the preset duration threshold, the step S407 is continuously executed until the duration reaches the preset duration threshold.

Here, the preset duration threshold may take a value of 2 s.

Step S408, starting the drainage pump to drain.

In the embodiment of the application, in a shutdown state or a standby state, the program continuously monitors the water level, when the water level exceeds the extremely low water level L0, if the water level continues to rise, when the change value of the water level frequency value exceeds a set threshold F (for example, 150Hz), and the duration exceeds a set time t0 (for example, 2 seconds), it is determined that water is abnormally fed, and drainage pump evacuation is started.

According to the method provided by the embodiment of the application, through real-time monitoring of the real-time water level and the water level change, when the distance from the door seal position is larger, whether abnormal water inflow exists or not can be judged in advance, and water overflow is prevented. When the abnormal water inflow is monitored, the door is automatically locked, and the prompt message is pushed to the mobile phone of the user through the function of the Internet of things, so that the user can maintain the mobile phone in time.

Based on the foregoing embodiments, the present application provides a control apparatus, where each module included in the apparatus and each unit included in each module may be implemented by a processor in a computer device; of course, the implementation can also be realized through a specific logic circuit; in the implementation process, the processor may be a Central Processing Unit (CPU), a Microprocessor Unit (MPU), a Digital Signal Processor (DSP), a Field Programmable Gate Array (FPGA), or the like.

Fig. 5 is a schematic structural diagram of a control device provided in an embodiment of the present application, where the control device 500 is applied to a clothes treatment apparatus, and as shown in fig. 5, the control device 500 includes:

a first obtaining module 501, configured to determine that the laundry treatment apparatus is in a non-operating state, and obtain a first water level in a tub of the laundry treatment apparatus;

the first obtaining module 501 is further configured to obtain a second water level in the barrel when it is determined that the first water level is higher than a preset water level threshold;

a first control module 502 for controlling a drain of the laundry treating apparatus to be turned on to drain water in the tub in case it is determined that the laundry treating apparatus is out of order based on the first water level and the second water level.

In some embodiments, the first obtaining module 501 is further configured to:

a second water level is determined based on the water level parameter.

In some embodiments, the first obtaining module 501 is further configured to obtain the first water level inside the tub of the laundry treatment apparatus again if the first water level is lower than or equal to the preset water level threshold;

the first control module 502 is further configured to control a drain of the laundry treatment apparatus to be opened to drain water in the tub when the first water level is higher than or equal to the critical water level.

In some embodiments, the control device 500 may further include:

the first determining module is used for determining a water level change value according to the first water level and the second water level;

the third obtaining module is used for obtaining the duration of the water level change value larger than a first preset threshold under the condition that the water level change value is larger than the first preset threshold;

and the second determination module is used for determining that the water inlet fault occurs in the clothes treatment equipment under the condition that the duration reaches a preset duration threshold.

In some embodiments, the control device 500 may further include:

and a third determination module for determining that the water drainage fault occurs in the laundry treating apparatus if the water level variation value is less than a second preset threshold.

In some embodiments, the first obtaining module 501 is further configured to:

In some embodiments, the control device 500 may further include:

the generating module is used for generating corresponding fault information according to the fault of the clothes processing equipment;

a third control module for controlling the alarm device to output the alarm information corresponding to the fault information, and/or

And the sending module is used for sending a prompt message to a terminal which is connected with the clothes processing equipment, wherein the prompt message at least carries the fault information.

Here, it should be noted that: the above description of the control device embodiment is similar to the above description of the method and has the same advantageous effects as the method embodiment. For technical details not disclosed in the embodiments of the control device of the present application, a person skilled in the art should understand with reference to the description of the embodiments of the method of the present application.

It should be noted that, in the embodiment of the present application, if the control method is implemented in the form of a software functional module and sold or used as a standalone product, the control method may also be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application may be essentially implemented or portions thereof contributing to the prior art may be embodied in the form of a software product stored in a storage medium, and including several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read Only Memory (ROM), a magnetic disk, or an optical disk. Thus, embodiments of the present application are not limited to any specific combination of hardware and software.

Accordingly, embodiments of the present application provide a computer-readable storage medium on which a computer program is stored, the computer program, when executed by a processor, implementing the steps in the control method provided in the above embodiments.

While fig. 6 is a schematic diagram illustrating a composition structure of a clothes treating apparatus according to an embodiment of the present invention, other exemplary structures of the clothes treating apparatus 600 may be foreseen according to the exemplary structure of the clothes treating apparatus 600 shown in fig. 6, and therefore, the structure described herein should not be considered as a limitation, for example, some components described below may be omitted, or components not described below may be added to adapt to specific requirements of some applications.

The laundry treating apparatus 600 shown in fig. 6 includes: a processor 601, at least one communication bus 602, a user interface 603, at least one external communication interface 604, and memory 605. Wherein the communication bus 602 is configured to enable connective communication between these components. The user interface 603 may include a display panel, and the external communication interface 604 may include a standard wired interface and a wireless interface, among others. Wherein the processor 601 is configured to execute the program of the control method stored in the memory to implement the steps in the control method provided by the above-mentioned embodiments.

The above description of the laundry treating apparatus and the storage medium embodiment is similar to the description of the method embodiment described above, with similar advantageous effects to the method embodiment. For technical details which are not disclosed in the embodiments of the laundry treatment apparatus and the storage medium of the present application, reference is made to the description of the embodiments of the method of the present application for understanding.

It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application. The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described device embodiments are merely illustrative, for example, the division of the unit is only a logical functional division, and there may be other division ways in actual implementation, such as: multiple units or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the coupling, direct coupling or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between the devices or units may be electrical, mechanical or other forms.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units; can be located in one place or distributed on a plurality of network units; some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, all functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may be separately regarded as one unit, or two or more units may be integrated into one unit; the integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

Those of ordinary skill in the art will understand that: all or part of the steps for realizing the method embodiments can be completed by hardware related to program instructions, the program can be stored in a computer readable storage medium, and the program executes the steps comprising the method embodiments when executed; and the aforementioned storage medium includes: a removable storage device, a ROM, a magnetic or optical disk, or other various media that can store program code.

Alternatively, the integrated units described above in the present application may be stored in a computer-readable storage medium if they are implemented in the form of software functional modules and sold or used as independent products. Based on such understanding, the technical solutions of the embodiments of the present application may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a product to perform all or part of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a removable storage device, a ROM, a magnetic or optical disk, or other various media that can store program code.

The above description is only for the embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A control method applied to a clothes treatment apparatus, the method comprising:

2. The method of claim 1, wherein the obtaining a second water level in the tub in case that the first water level is determined to be higher than a preset water level threshold comprises:

a second water level is determined based on the water level parameter.

3. The method of claim 2, further comprising:

4. The method according to any one of claims 1 to 3, further comprising:

5. The method of claim 4, further comprising:

6. The method of claim 4, further comprising:

7. The method of claim 5, further comprising:

8. A control device applied to a clothes treatment apparatus, characterized in that the device comprises:

9. A laundry treating apparatus, comprising:

a memory for storing executable instructions;

a processor for implementing the steps of the control method of any one of claims 1 to 7 when executing executable instructions stored in the memory.

10. A computer-readable storage medium having computer-executable instructions stored thereon, the computer-executable instructions configured to perform the steps of the control method of any of claims 1 to 7.