阅读说明：本技术 用于洗涤设备的运行时间修正方法 (Run time correction method for washing equipment ) 是由 才智 高秋英 岳本超 于 2019-03-19 设计创作，主要内容包括：本发明涉及洗涤设备技术领域,具体提供一种用于洗涤设备的运行时间修正方法,旨在解决现有洗涤设备实际的剩余运行时间与设定的剩余运行时间不匹配的问题。为此目的,本发明的运行时间修正方法包括下列步骤：在洗涤设备执行注水操作的过程中,获取洗涤设备的注水时间；和/或在洗涤设备执行排水操作的过程中,获取洗涤设备的排水时间；根据注水时间和/或排水时间来修正洗涤设备的剩余运行时间。本发明根据注水时间和/或排水时间来修正洗涤设备的剩余运行时间,使得洗涤设备的实际剩余运行时间与洗涤设备设定的剩余运行时间相匹配,与显示装置显示的剩余运行时间相匹配,使得用户能够准确地判断洗涤设备还需要运行多长时间。(The invention relates to the technical field of washing equipment, in particular to a running time correction method for washing equipment, and aims to solve the problem that the actual residual running time of the existing washing equipment is not matched with the set residual running time. To this end, the runtime correction method of the present invention comprises the steps of: acquiring water injection time of the washing equipment in the process of executing water injection operation by the washing equipment; and/or acquiring the drainage time of the washing equipment in the process of performing the drainage operation by the washing equipment; and correcting the residual operation time of the washing equipment according to the water filling time and/or the water draining time. The invention corrects the residual operation time of the washing equipment according to the water injection time and/or the water drainage time, so that the actual residual operation time of the washing equipment is matched with the residual operation time set by the washing equipment and is matched with the residual operation time displayed by the display device, and a user can accurately judge how long the washing equipment needs to operate.)

1. A run-time correction method for a washing apparatus, characterized in that the run-time correction method comprises the steps of:

acquiring water injection time of the washing equipment in the process of executing water injection operation by the washing equipment; and/or

Acquiring the drainage time of the washing equipment in the process of performing drainage operation by the washing equipment;

correcting the remaining operation time of the washing apparatus according to the water filling time and/or the water draining time.

2. The operating time correction method according to claim 1, wherein the step of obtaining the water filling time of the washing apparatus specifically comprises:

and acquiring the water injection time of the washing equipment for injecting the washing water with the first preset water quantity threshold.

3. The operating time correction method according to claim 2, wherein the step of "acquiring a drain time of the washing apparatus" specifically includes:

and acquiring the drainage time of the washing water discharged by the washing equipment at a second preset water quantity threshold value.

4. The operating time correction method according to claim 3, wherein the step of correcting the remaining operating time of the washing apparatus according to the water filling time and/or the water draining time comprises:

determining the water injection speed of the washing equipment according to the water injection time and the first preset water quantity threshold;

correcting the residual water injection time of the washing equipment according to the water injection speed; and/or

Determining the water drainage speed of the washing equipment according to the water drainage time and the second preset water quantity threshold;

correcting the remaining drainage time of the washing equipment according to the drainage speed;

and correcting the residual operation time of the washing equipment according to the corrected residual water filling time and/or residual water draining time.

5. The operation time correction method according to claim 4, wherein the step of correcting the remaining water filling time of the washing apparatus according to the water filling rate includes:

determining the residual water injection amount of the washing equipment according to the total water injection amount of the washing equipment and the first preset water amount threshold;

determining the actual residual water injection time of the washing equipment according to the residual water injection amount and the water injection speed;

and correcting the residual water filling time which is written in advance and stored in the washing equipment according to the actual residual water filling time.

6. The operation time correction method according to claim 5, wherein the step of determining the actual remaining water filling time of the washing device based on the remaining water filling amount and the water filling speed specifically comprises:

calculating the actual remaining water injection time according to the following formula:

t₁＝(L₁-L₀)×t₀/L₀

wherein, t₁For the actual remaining water injection time, t₀For the water injection time, L₁For the total water injection, L₀Is the first preset water volume threshold.

7. The operation time correction method according to claim 4, wherein the step of correcting the remaining drain time of the washing apparatus according to the drain speed specifically comprises:

determining the residual water discharge amount of the washing equipment according to the total water discharge amount of the washing equipment and the second preset water amount threshold value;

determining an actual remaining drain time of the washing apparatus according to the remaining drain amount and the drain speed;

correcting a remaining drain time previously written and stored in the washing apparatus according to the actual remaining drain time.

8. The run-time correction method according to claim 7, wherein the step of determining the actual remaining drain time of the washing apparatus based on the remaining drain amount and the drain speed specifically comprises:

calculating the actual remaining drainage time according to the following formula:

t₃＝(L₃-L₂)×t₂/L₂

wherein, t₃Is the said fruitResidual drainage time t₂For the drainage time, L₃Is the total water discharge, L₂And the second preset water quantity threshold value is set.

9. The operating time correction method according to claim 4, wherein the step of correcting the remaining operating time of the washing apparatus according to the corrected remaining water filling time and/or remaining water discharging time specifically comprises:

determining the actual residual running time of the washing equipment according to the corrected residual water injection time and/or residual water drainage time;

correcting the remaining operation time previously written and stored in the washing apparatus according to the actual remaining operation time.

10. The running time correction method according to any one of claims 1 to 9, wherein the washing apparatus includes a body and a display device provided on the body for displaying at least one of the water filling time, the water draining time, and the remaining running time.

Technical Field

The invention relates to the technical field of washing equipment, and particularly provides a running time correction method for washing equipment.

Background

With the progress of science and technology, the automation level of human life is higher and higher, and daily housework is gradually replaced by machines from manpower. The washing equipment is used as a common household appliance in daily life, and brings great convenience to the life of people. The washing apparatuses are classified according to washing methods, and may be roughly classified into pulsator washing machines and drum washing machines. In order to meet the use requirements of users, a display device is arranged on the washing machine to display information such as washing programs, running states, total running time and the like, so that the users can know the running states of the washing machine in time.

Disclosure of Invention

In order to solve the above-mentioned problems in the prior art, i.e., to solve the problem that the actual remaining operation time of the existing washing apparatus does not match the set remaining operation time, the present invention provides an operation time correction method for a washing apparatus, the operation time correction method comprising the steps of: acquiring water injection time of the washing equipment in the process of executing water injection operation by the washing equipment; and/or acquiring the drainage time of the washing equipment in the process of performing the drainage operation by the washing equipment; and correcting the residual operation time of the washing equipment according to the water filling time and/or the water draining time.

In a preferred embodiment of the above operating time correction method, the step of "acquiring a water filling time of the washing device" includes: and acquiring the water injection time of the washing water injected into the first preset water quantity threshold value by the washing equipment.

In a preferred embodiment of the above operating time correction method, the step of "acquiring a drain time of the washing apparatus" includes: and acquiring the drainage time of the washing water discharged by the washing equipment at the second preset water quantity threshold value.

In a preferred embodiment of the above operating time correcting method, the step of "correcting the remaining operating time of the washing machine according to the water filling time and/or the water discharging time" includes: determining the water injection speed of the washing equipment according to the water injection time and a first preset water quantity threshold; correcting the residual water injection time of the washing equipment according to the water injection speed; and/or determining the drainage speed of the washing equipment according to the drainage time and a second preset water quantity threshold value; correcting the residual water discharge time of the washing equipment according to the water discharge speed; and correcting the residual running time of the washing equipment according to the corrected residual water filling time and/or residual water draining time.

In a preferred embodiment of the operation time correction method, the step of correcting the remaining water filling time of the washing device according to the water filling rate includes: determining the residual water injection amount of the washing equipment according to the total water injection amount of the washing equipment and a first preset water amount threshold; determining the actual residual water injection time of the washing equipment according to the residual water injection amount and the water injection speed; and correcting the residual water filling time which is written in advance and stored in the washing equipment according to the actual residual water filling time.

In the aboveIn a preferred embodiment of the operation time correction method, the step of determining the actual remaining water injection time of the washing device according to the remaining water injection amount and the water injection rate includes: the actual remaining water injection time is calculated according to the following formula: t is t₁＝(L₁-L₀)×t₀/L₀Wherein, t₁For the actual remaining water injection time, t₀For the time of water injection, L₁Total amount of water injected, L₀Is a first preset water volume threshold.

In a preferred embodiment of the above operating time correcting method, the step of "correcting the remaining drain time of the washing machine according to the drain speed" includes: determining the residual water discharge of the washing equipment according to the total water discharge of the washing equipment and a second preset water quantity threshold; determining an actual remaining draining time of the washing apparatus according to the remaining draining amount and the draining speed; the remaining drain time previously written and stored in the washing apparatus is corrected according to the actual remaining drain time.

In a preferred embodiment of the above operating time correction method, the step of determining the actual remaining drain time of the washing machine based on the remaining drain amount and the drain speed specifically includes: the actual remaining drainage time is calculated according to the following formula: t is t₃＝(L₃-L₂)×t₂/L₂Wherein, t₃For the actual remaining drainage time, t₂For the drainage time, L₃As total displacement, L₂Is a second preset water volume threshold.

In a preferred embodiment of the above operating time correcting method, the step of correcting the remaining operating time of the washing machine according to the corrected remaining water filling time and/or the corrected remaining water discharging time includes: determining the actual residual running time of the washing equipment according to the corrected residual water injection time and/or the corrected residual water drainage time; the remaining operation time previously written and stored in the washing apparatus is corrected according to the actual remaining operation time.

In a preferred embodiment of the above operating time correcting method, the washing apparatus includes a body and a display device provided on the body, the display device being configured to display at least one of a water filling time, a water discharging time, and a remaining operating time.

As can be understood by those skilled in the art, in a preferred embodiment of the run-time correction method of the present invention, during the water filling operation of the washing machine, the water filling time of the washing machine is acquired; and/or acquiring the drainage time of the washing machine in the process of performing the drainage operation of the washing machine; and correcting the residual operation time of the washing machine according to the water filling time and/or the water draining time. Compared with the technical scheme that the running time of the existing washing machine is fixed, the residual running time of the washing machine is corrected through the water filling time and/or the water draining time in the running process of the washing machine, so that the actual residual running time of the washing machine is matched with the set residual running time of the washing machine and is matched with the residual running time displayed by the display device, a user can accurately judge how long the washing machine needs to run, and the use experience of the user is improved.

Further, determining a water filling speed according to the water filling time and a first preset water volume threshold, correcting the remaining water filling time of the washing machine according to the water filling speed, and calculating the actual remaining water filling time according to the following formula: t is t₁＝(L₁-L₀)×t₀/L₀The actual residual water filling time of the washing machine can be accurately determined, so that the residual water filling time set by the washing machine can be accurately corrected, the residual running time set by the washing machine can be accurately corrected, and the actual residual running time of the washing machine is matched with the residual running time set by the washing machine.

Further, a drain speed is determined based on the drain time and a second preset water volume threshold, a remaining drain time of the washing machine is corrected based on the drain speed, and an actual remaining drain time is calculated according to the following formula: t is t₃＝(L₃-L₂)×t₂/L₂The method can accurately determine the actual residual drainage time of the washing machine, thereby accurately correcting the residual drainage time set by the washing machine and further accurately correcting the residual operation time set by the washing machine, so that the actual residual drainage time of the washing machine can be accurately determinedThe remaining operation time is matched with the remaining operation time set for the washing machine.

Drawings

The operation time correction method of the present invention will be described with reference to the accompanying drawings in conjunction with a washing machine. In the drawings:

FIG. 1 is a flow chart of a runtime correction method of the present invention;

FIG. 2 is a flow diagram of a runtime correction method of one embodiment of the invention.

Detailed Description

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. For example, although the present application has been described in conjunction with a washing machine, the technical solution of the present invention is not limited thereto, and the operation time correction method can be obviously applied to other washing apparatuses such as a shoe washing machine, a washing and drying machine, etc., without departing from the principle and scope of the present invention.

Based on the technical problems proposed in the background art, the invention provides a running time correction method for a washing machine, which aims to correct the residual running time of the washing machine according to water filling time and/or water draining time, so that the actual residual running time of the washing machine is matched with the set residual running time of the washing machine and is matched with the residual running time displayed by a display device, a user can accurately judge how long the washing machine needs to run, and the use experience of the user is further improved.

Referring to fig. 1 and 2, fig. 1 is a flow chart of a runtime correction method of the present invention; FIG. 2 is a flow diagram of a runtime correction method of one embodiment of the invention. As shown in fig. 1, the runtime correction method of the present invention includes the following steps:

s1, acquiring the water filling time of the washing machine in the process of executing the water filling operation of the washing machine;

s2, acquiring the drainage time of the washing machine in the process of the drainage operation of the washing machine;

and S3, correcting the residual operation time of the washing machine according to the water filling time and the water draining time.

It should be noted that, in the actual operation process, the water filling time of the washing machine may be acquired only in the process of the washing machine executing the water filling operation; the remaining operation time of the washing machine is corrected according to the water filling time. Or, the water discharge time of the washing machine is obtained only in the process of the washing machine executing the water discharge operation; the remaining operation time of the washing machine is corrected according to the drain time. The parameter for correcting the remaining operation time can be flexibly adjusted and set by those skilled in the art in practical applications as long as the requirement for being able to correct the remaining operation time of the washing machine is satisfied.

In a preferred embodiment, the step of "acquiring the water filling time of the washing machine" in the step S1 includes:

and S11, acquiring the water filling time of the washing machine for filling the washing water with the first preset water quantity threshold.

Preferably, in step S11, the water filling speed of the washing machine can be accurately determined by injecting a fixed amount of washing water (i.e., injecting the washing water of the first preset water amount threshold) and the time required for injecting the amount of washing water (i.e., the water filling time), so as to provide accurate data for the subsequent determination of the water filling speed of the washing machine.

In the above process, the water filling speed of the washing machine can be determined by setting the first preset water amount threshold. The first preset water volume threshold may be a washing water volume set by the washing machine, or may be a minimum water volume capable of determining a water filling speed of the washing machine. Of course, the first preset water threshold is not limited to the above-mentioned water amount, and may be other water amounts, such as an experimental water amount obtained by a person skilled in the art according to experiments under a specific working condition, or an empirical water amount obtained by an experiment, as long as the requirement of determining the water filling speed of the washing machine according to the first preset water threshold is satisfied.

In a preferred embodiment, the step of "acquiring the draining time of the washing machine" in the step S2 includes:

and S21, acquiring the drainage time of the washing water discharged by the washing machine at the second preset water quantity threshold value.

Preferably, in step S21, the drain speed of the washing machine can be accurately determined by draining a fixed amount of washing water (i.e., draining the washing water of the second preset water amount threshold) and the time required to drain the amount of washing water (i.e., the drain time), providing accurate data for the subsequent determination of the drain speed of the washing machine.

In the above process, the water discharge speed of the washing machine can be determined by setting the second preset water amount threshold. The second preset water volume threshold may be a water volume for draining the washing water in the washing machine, or may be a minimum water volume capable of determining a draining speed of the washing machine. Of course, the second preset water amount threshold is not limited to the above-mentioned water amount, and may be other water amounts, such as an experimental water amount obtained by a person skilled in the art according to experiments under a specific working condition, or an empirical water amount obtained by an experiment, as long as the requirement for determining the drainage speed of the washing machine by the second preset water amount threshold is satisfied.

The value of the second preset water volume threshold and the value of the first preset water volume threshold may be the same or different, and those skilled in the art can flexibly adjust and set the values of the second preset water volume threshold and the first preset water volume threshold.

In a preferred embodiment, the step of "correcting the remaining operation time of the washing machine according to the water filling time and the water discharging time" in the step S3 includes:

s31, determining the water filling speed of the washing machine according to the water filling time and the first preset water volume threshold;

s32, correcting the residual water filling time of the washing machine according to the water filling speed;

s33, determining the drainage speed of the washing machine according to the drainage time and a second preset water quantity threshold;

s34, correcting the residual water discharge time of the washing machine according to the water discharge speed;

and S35, correcting the residual running time of the washing machine according to the corrected residual water filling time and residual water discharging time.

In order to accurately correct the remaining water filling time of the washing machine, the step of "correcting the remaining water filling time of the washing machine according to the water filling speed" in the step S32 may include:

s321, determining the residual water injection amount of the washing machine according to the total water injection amount of the washing machine and a first preset water amount threshold;

s322, determining the actual residual water filling time of the washing machine according to the residual water filling amount and the water filling speed;

and S323, correcting the residual water filling time which is written in advance and stored in the washing machine according to the actual residual water filling time.

Preferably, in step S321, the total water injection amount of the washing machine is subtracted from the first preset water amount threshold, and the obtained difference is the remaining water injection amount of the washing machine. Wherein, the total water injection quantity of the washing machine comprises at least one of washing water injection quantity, rinsing water injection quantity and balance correction water injection quantity, if the washing water injection quantity is the total water injection quantity of the rinsing, and if the rinsing water injection quantity is the total water injection quantity of the water injection balance correction, the balance correction water injection quantity is the total water injection quantity of the water injection balance correction. Of course, the total water injection amount is not limited to the above-mentioned water injection amount, and other water injection amounts may be included, and such changes do not depart from the principle and scope of the present invention as long as the water injection amounts during the operation of the washing machine are the total water injection amount.

Preferably, the step of determining the actual remaining water filling time of the washing machine according to the remaining water filling amount and the water filling speed in the step S322 includes: the actual remaining water injection time is calculated according to the following formula:

t₁＝(L₁-L₀)×t₀/L₀

wherein, t₁: actual residual water injection time;

t₀: water injection time;

L₁: the total water injection amount;

L₀: a first preset water volume threshold.

By adopting the method, the actual residual water filling time of the washing machine can be accurately determined, so that the residual water filling time set by the washing machine can be accurately corrected, the residual running time set by the washing machine can be accurately corrected, and the actual residual running time of the washing machine is matched with the residual running time set by the washing machine.

Preferably, in the step S323, the remaining water filling time previously written and stored in the washing machine is corrected according to the actual remaining water filling time, and the remaining water filling time previously written and stored in the washing machine is corrected so that the actual remaining water filling time of the washing machine matches with the newly set remaining water filling time of the washing machine.

In order to accurately correct the remaining drainage time of the washing machine, the step of "correcting the remaining drainage time of the washing machine according to the drainage speed" in the step S34 may include:

s341, determining the residual water discharge of the washing machine according to the total water discharge of the washing machine and a second preset water quantity threshold value;

s342, determining the actual residual drainage time of the washing machine according to the residual drainage quantity and the drainage speed;

s343, the remaining drainage time previously written and stored in the washing machine is corrected according to the actual remaining drainage time.

Preferably, in step S341, the total water discharge of the washing machine is subtracted from the second preset water threshold, and the obtained difference is the remaining water discharge of the washing machine. Wherein the total water discharge of the washing machine includes at least one of washing water discharge, rinsing water discharge and balance correction water discharge, the rinsing water discharge is the total water discharge of the multiple rinsing if the multiple rinsing, and the balance correction water injection is the total water discharge of the multiple water injection balance correction if the multiple water injection balance correction. Of course, the total water displacement is not limited to the above-listed water displacements, and other water displacements may be included, as long as the water displacements during operation of the washing machine are the total water displacement, without departing from the principle and scope of the present invention.

Preferably, the step of determining the actual remaining drainage time of the washing machine according to the remaining drainage amount and the drainage speed in the above step S342 specifically includes: the actual remaining drainage time is calculated according to the following formula:

t₃＝(L₃-L₂)×t₂/L₂

wherein, t₃: actual remaining drainage time;

t₂: draining time;

L₃: total displacement;

L₂: a second preset water volume threshold.

By adopting the method, the actual residual drainage time of the washing machine can be accurately determined, so that the residual drainage time set by the washing machine can be accurately corrected, the residual running time set by the washing machine can be accurately corrected, and the actual residual running time of the washing machine is matched with the residual running time set by the washing machine.

Preferably, in the step S343, the remaining drainage time previously written and stored in the washing machine is corrected according to the actual remaining drainage time, and the remaining drainage time previously written and stored in the washing machine is corrected so that the actual remaining drainage time of the washing machine matches the newly set remaining drainage time of the washing machine.

In order to accurately correct the remaining water discharge time of the washing machine, the step of "correcting the remaining operation time of the washing machine according to the corrected remaining water injection time and remaining water discharge time" in the step S35 may include:

s351, determining the actual residual running time of the washing machine according to the corrected residual water filling time and residual water discharging time;

and S352, correcting the residual operation time which is written in advance and stored in the washing machine according to the actual residual operation time.

Preferably, in step S351, during the operation of the water filling, washing, draining, dewatering, rinsing, balance correcting and other processes, the water filling time is affected due to the influence of water pressure and other factors during the water filling process, the water draining time of the washing machine is affected due to deviation, and the failure of the washing machine during the draining process also affects the time of other stages, so that the actual remaining operation time of the washing machine can be accurately determined according to the corrected remaining water filling time and remaining water draining time.

Preferably, in the step S352, the remaining operation time previously written and stored in the washing machine is corrected according to the actual remaining operation time, and the remaining operation time previously written and stored in the washing machine is corrected such that the actual remaining operation time of the washing machine matches the newly set remaining operation time of the washing machine.

Referring now to FIG. 2, FIG. 2 is a flow diagram of a runtime correction method according to an embodiment of the present invention.

As shown in fig. 2, in a preferred embodiment, the complete process of the run-time correction method of the washing machine of the present invention may be:

s11, acquiring the water filling time of the washing machine for filling the washing water with the first preset water volume threshold in the water filling operation process of the washing machine;

s21, acquiring the drainage time of the washing machine for draining the washing water with the second preset water quantity threshold in the drainage operation process of the washing machine;

s31, determining the water filling speed of the washing machine according to the water filling time and the first preset water volume threshold;

s321, determining the residual water injection amount of the washing machine according to the total water injection amount of the washing machine and a first preset water amount threshold;

s322, determining the actual residual water filling time of the washing machine according to the residual water filling amount and the water filling speed;

s323, correcting the residual water filling time which is written in advance and stored in the washing machine according to the actual residual water filling time;

s33, determining the drainage speed of the washing machine according to the drainage time and a second preset water quantity threshold;

s341, determining the residual water discharge of the washing machine according to the total water discharge of the washing machine and a second preset water quantity threshold value;

s342, determining the actual residual drainage time of the washing machine according to the residual drainage quantity and the drainage speed;

s343, correcting the residual water discharging time which is written in advance and stored in the washing machine according to the actual residual water discharging time;

s351, determining the actual residual running time of the washing machine according to the corrected residual water filling time and residual water discharging time;

and S352, correcting the residual operation time which is written in advance and stored in the washing machine according to the actual residual operation time.

It should be noted that the above-mentioned embodiment is only a preferred embodiment of the present invention, and is only used for illustrating the principle of the method of the present invention, and is not intended to limit the protection scope of the present invention, and in practical applications, those skilled in the art can implement the above-mentioned function allocation by different steps, i.e. re-dividing or combining the steps in the embodiment of the present invention, as required. For example, the steps of the above embodiments may be combined into one step, or further divided into multiple sub-steps to complete all or part of the functions described above. For the names of the steps involved in the embodiments of the present invention, they are only for distinguishing the respective steps, and are not to be construed as limiting the present invention.

Although not shown in the drawings, the present invention also provides a washing machine including a housing, a washing tub disposed in the housing, a detection device, a display device, and a control device; the detection device is arranged on the shell and used for detecting the water filling time and the water draining time of the washing machine; a display device disposed on the housing for displaying at least one of a water filling time, a water discharging time and a remaining operation time, and of course, the display device may also display program and status information of the washing machine; the control device is arranged on the shell and can correct the residual operation time of the washing machine based on the detection result of the detection device. Of course, the actual installation positions of the detection device, the display device and the control device are not limited to the above-mentioned exemplary installation positions, and those skilled in the art can flexibly adjust and set the actual installation positions of the detection device, the display device and the control device in practical applications as long as the remaining operation time of the washing machine can be accurately corrected by the mutual cooperation of the detection device, the display device and the control device.

Preferably, the washing tub includes an outer tub and an inner tub rotatably disposed inside the outer tub, and laundry is placed in the inner tub.

Preferably, the detecting device is an infrared spectrum sensor, and may also be other types of sensors, such as a radio frequency sensor, etc., so as to detect the water filling time and the water draining time of the washing machine, and it should be noted that the detecting method of the water filling time and the water draining time of the washing machine should not limit the present invention.

Preferably, the display device is a display member such as an LED, LCD, TFT, or the like.

Preferably, the control device may be a control device of the washing machine itself, or may be an additional control device or other mobile terminal, which is not described herein again.

So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.