WO2018113757A1 - 进水管过滤网堵塞自诊断方法及洗衣机 - Google Patents

进水管过滤网堵塞自诊断方法及洗衣机 Download PDF

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Publication number
WO2018113757A1
WO2018113757A1 PCT/CN2017/117845 CN2017117845W WO2018113757A1 WO 2018113757 A1 WO2018113757 A1 WO 2018113757A1 CN 2017117845 W CN2017117845 W CN 2017117845W WO 2018113757 A1 WO2018113757 A1 WO 2018113757A1
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Prior art keywords
water
water level
time
inlet
washing machine
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PCT/CN2017/117845
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English (en)
French (fr)
Inventor
舒海
吕佩师
许升
黄振兴
陈玉玲
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青岛海尔洗衣机有限公司
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Publication of WO2018113757A1 publication Critical patent/WO2018113757A1/zh

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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/081—Safety arrangements for preventing water damage
    • D06F39/082—Safety arrangements for preventing water damage detecting faulty draining operations, e.g. filter blockage, faulty pump
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F17/00—Washing machines having receptacles, stationary for washing purposes, wherein the washing action is effected solely by circulation or agitation of the washing liquid
    • D06F17/06—Washing machines having receptacles, stationary for washing purposes, wherein the washing action is effected solely by circulation or agitation of the washing liquid by rotary impellers

Definitions

  • the present disclosure relates to the field of filter clogging detection technology, for example, to a water inlet filter clogging self-diagnosis method and a washing machine.
  • the water inlet pipe of the washing machine in the related art is simply connected to the faucet and the washing machine, and there is no filtering device inside, and the tap water often contains impurities such as sediment and heavy metals, and the impurities will not only make the water tank of the washing machine after entering the washing machine through the water inlet pipe. If the parts are yellow and discolored, affecting the appearance and use, the clothes will be dyed, causing damage to the clothes and can no longer be worn.
  • impurities such as scale adhere to the heating pipes, which will affect the time. Heating efficiency increases power consumption and reduces the life of the heating tube. Therefore, the impurities are affected by the normal use of the washing machine after entering the washing machine by the inlet pipe.
  • the related art installs a filter in the inlet pipe, and intercepts impurities in the tap water through the filter to make the washing effect of the clothes good and prolong the service life of the washing machine.
  • the filter is used for a long time, it is prone to blockage. When the blockage occurs, the filter should be cleaned in time, otherwise the water intake time will be long.
  • the present disclosure proposes a self-diagnosis method for the inlet pipe filter clogging, which can promptly remind the user that the inlet pipe filter is clogged, and the clogging detection accuracy is higher.
  • the present disclosure also proposes a washing machine that uses the above-described inlet pipe filter clogging self-diagnosis method to determine whether the inlet pipe filter of the washing machine is clogged.
  • a self-diagnosis method for plugging a water inlet filter comprising:
  • the average value of the water inlet speed occurs at least one of the following in a plurality of consecutive set time periods: the average value of the gradual decrease and the water inlet time gradually increases over a plurality of consecutive set time periods,
  • a prompt to block the inlet pipe filter is issued.
  • an average value of the water inlet speeds in a plurality of consecutive set time periods is less than or equal to a set water inlet speed
  • the set water inlet speed is a tap water standard water pressure
  • the inlet water pipe filter has no 60% of the water inflow rate in the case of blockage.
  • an average value of the water inflow time in a plurality of consecutive set time periods is greater than or equal to a set water inlet time, wherein the set water inlet time is a tap water standard water pressure and the inlet water pipe filter has no 1.7 times the water inflow time in the case of blockage.
  • the number of water intakes in the set time period is one or more times.
  • the influent volume set by each inflow is the same, and the water inflow time when each influent reaches the set influent volume is obtained by metering, and is calculated according to the influent volume and the influent time.
  • the influent speed of each influent water is the same, and the water inflow time when each influent reaches the set influent volume is obtained by metering, and is calculated according to the influent volume and the influent time. The influent speed of each influent water.
  • the water inlet pipe feeds water into the washing machine, and the washing machine is provided with a first set water level and a second set water level, wherein the first set water level is lower than the second set water level, The volume difference between the first set water level and the second set water level is unchanged, and the water level sensor detects whether the water level in the washing machine reaches the first set water level or the second set water level.
  • the first set water level is a reset water level of the water level sensor
  • the second set water level is a water level at an upper edge of the pulsator.
  • the second set water level is a washing water level set by a user, and the volume corresponding to the first set water level is 5 L smaller than a volume corresponding to the second set water level.
  • the first set water level is a reset water level of the water level sensor
  • the second set water level is a water level at a lower edge of the inner tube.
  • a washing machine adopts the above-mentioned inlet pipe filter clogging self-diagnosis method to determine whether the inlet pipe filter of the washing machine is clogged.
  • the inlet pipe filter clogging self-diagnosis method proposed by the present disclosure is less prone to inaccurate diagnosis results due to a single numerical fluctuation.
  • Embodiment 1 is a flow chart of a method for self-diagnosis of a water inlet filter clogging provided in Embodiment 1;
  • Embodiment 2 is a flow chart of a method for self-diagnosis of the inlet pipe filter clogging provided in Embodiment 2;
  • Embodiment 3 is a flow chart of a method for self-diagnosis of the inlet pipe filter clogging provided in Embodiment 3;
  • Embodiment 4 is a flow chart of a method for self-diagnosis of the inlet pipe filter clogging provided in Embodiment 4.
  • the embodiment provides a self-diagnosis method for plugging a water inlet filter, comprising:
  • step 110 the water is fed for the nth time, the inlet valve is opened, and the time is counted.
  • step 120 it is determined whether the first set water level is reached.
  • step 130 is performed to determine that the first set water level is not reached, and then return to step 110.
  • step 130 the time T1 to reach the first set water level is saved
  • step 140 continue timing
  • step 150 it is determined whether the second set water level is reached.
  • step 160 is performed to determine that the second set water level is not reached, and step 1120 is performed.
  • step 160 the time T2 to reach the second set water level is saved
  • step 170 the average value of the nth water inlet speed is calculated according to the water level and T1, T2, and saved,
  • step 180 the trend of the average value of the n-th to nth water inflow rates is counted
  • step 190 it is determined whether the average value of the water inlet speed is gradually decreased.
  • step 1100 is performed to determine that the average value of the water inlet speed does not gradually decrease, and step 1110 is performed.
  • step 1100 a prompt to block the inlet pipe filter is issued
  • step 1110 the water is normally poured
  • step 1120 it is determined whether the timing time reaches a preset time.
  • step 1130 is executed to determine that the timing time has not reached the preset time, and step 140 is performed.
  • step 1130 the water intake is stopped and a water inflow timeout alarm is issued.
  • the filter of the inlet pipe is clogged by counting the change trend of the average value of the plurality of water inlet velocities, and the judgment is less likely to cause a diagnosis result due to the fluctuation of the average value of the single water inlet velocity. Inaccurate.
  • n and m are non-zero natural numbers, and n is greater than m, wherein m can be 3-10 times, and a highly accurate diagnosis result is obtained by a trend of the average value of the multiple water inflow speeds.
  • the number of water inflows in the set time period is one time
  • the trend of the average value of the water inlet speed is a change of multiple water inflows, which can avoid the misjudgment situation in the case of single water inflow.
  • the slow water in the water inlet process such as: the faucet is not fully opened, the water pressure is low, the drain pipe is not placed properly, the side inlet side row, the drain valve is not closed completely, the water level sensing is abnormal, the inlet valve filter The blockage, the water inlet solenoid valve is not fully opened, and the inlet pipe is leaking. It is judged whether or not the inlet pipe filter is clogged by the change trend of the average value of the water inflow rate of the multiple inflow water, and it is possible to prevent the water inflow due to other reasons from being slow and to make a wrong diagnosis.
  • the program determines whether the average value of the water inlet speed is gradually decreasing, and determines whether the average value of the water inlet speed from the nmth to the nth time is less than or equal to the set water inlet speed, and sets the water inlet speed to the tap water standard water.
  • 60% of the water inlet speed of the inlet pipe filter without clogging, if it is, the average value of the water inlet speed from the nmth to the nth is less than 60% of the normal water inlet speed, which can be excluded. Due to the impact of normal water pressure fluctuations, the correctness of the diagnosis results is guaranteed.
  • the preset time is greater than T2.
  • the faucet may be caused by the faucet not being opened, the water is stopped, or the water pressure is low, and an alarm is issued through step 1130. Prompt the user to view and resolve.
  • the influent volume set by each inflow is the same, and the water inflow time when each influent reaches the set influent volume is obtained by metering, and each water volume is calculated according to the influent volume and the influent time.
  • the water inlet speed of the secondary water is connected to the washing machine, and the first set water level and the second set water level are set on the washing machine, the first set water level is lower than the second set water level, and between the first set water level and the second set water level
  • the water volume difference does not change, and the water level sensor detects whether the water level in the washing machine reaches the first set water level or the second set water level.
  • the existing water level sensor is used to measure the water level and then calculated to obtain the average value of the water inlet speed, which can avoid the installation of hardware devices such as flowmeters and save costs.
  • the first set water level is the reset water level of the water level sensor
  • the second set water level is the water level at the upper edge of the pulsator to avoid large-area contact with the clothes; or the second set water level
  • the volume corresponding to the first set water level is 5L smaller than the volume corresponding to the second set water level, and when the first set water level is reached, the clothing and the water can already achieve sufficient contact, to the first 2. In the process of setting the water level, the amount of water that the clothes absorb too much will not occur.
  • the first set water level is the reset water level of the water level sensor
  • the second set water level is the water level at the lower edge of the inner tube. The second set water level does not reach the area where the clothes are located.
  • the above first set water level and the second set water level are selected in order to avoid the error of the water absorption of the washed laundry and the calculation of the water inlet time and the water inlet speed.
  • the average value of the water inlet speed at the time of the first water inflow for each laundry is selected, so that the first time each time the laundry enters the water, the laundry is not soaked, and the clothing is infused every time.
  • the difference between the water absorption is reduced, avoiding errors in the diagnosis of the plugging of the inlet pipe filter. It is also possible to statistically judge the average value of the water inlet speed in each washing and rinsing water in a washing process, and at this time, an appropriate first set water level and a second set water level can be selected to avoid water absorption of the laundry. The impact of sex on the diagnosis.
  • the embodiment provides a self-diagnosis method for plugging a water inlet filter, comprising:
  • step 210 the water is fed for the nth time, the inlet valve is opened, and the time is counted.
  • step 220 it is determined whether the first set water level is reached.
  • step 230 is performed to determine that the first set water level is not reached, and then return to step 210.
  • step 230 the time T1 to reach the first set water level is saved
  • step 240 continue to time
  • step 250 it is determined whether the second set water level is reached.
  • step 260 is executed to determine that the second set water level is not reached, and step 2130 is performed.
  • step 260 the time T2 to reach the second set water level is saved
  • step 270 the water inflow time is calculated according to T1 and T2, and saved,
  • step 280 the average values of the inflow times from the nmth to the nth, the nth to the mth, the nth to the nth (n-1th)th, respectively, are calculated. ,
  • step 290 the trend of the average value of the p-water inflow time is counted
  • step 2100 it is determined whether the average value of the water inlet time is gradually increasing.
  • step 2110 is performed to determine that the average value of the water inlet time does not gradually increase, and step 2120 is performed.
  • step 2110 a prompt to block the inlet pipe filter is issued
  • step 2120 the water is normally poured
  • step 2130 it is determined whether the timing time reaches a preset time.
  • step 2140 is executed to determine that the timing time has not reached the preset time, and step 240 is performed.
  • step 2140 the water ingress is stopped and an influent timeout alarm is issued.
  • p is a natural number not less than 2.
  • the difference between the embodiment and the first embodiment is that, in the clogging self-diagnosis method, it is judged whether the filter of the water inlet pipe is blocked by counting the change trend of the average value of the plurality of water inlet times, and the judgment is not easy to occur due to a single entry.
  • the diagnostic result of the fluctuation of the average value of the water time is not accurate. It can be seen from the above that if the change trend of the average value of the water inflow time is gradually increasing as the number of times of water intake increases, it is judged that the inlet pipe filter is clogged.
  • the average value of the influent time in a set period of time is the average of the inflow time of m inflows, through successive p influent times. Judging the trend of the average value can better reflect whether the inlet pipe filter is clogged, and the trend of the average value of the influent time is obtained by entering the water multiple times during the set time period, so that the inlet pipe filter can be better determined.
  • the clogging fault ensures the correctness of the diagnosis.
  • the water inlet time can be set to 3 min.
  • the embodiment provides a self-diagnosis method for plugging a water inlet filter, comprising:
  • step 310 the water is fed for the nth time, the inlet valve is opened, and the time is counted.
  • step 320 it is determined whether the first set water level is reached.
  • step 330 is performed to determine that the first set water level is not reached, and then return to step 310.
  • step 330 the time T1 to reach the first set water level is saved
  • step 340 continue timing
  • step 350 it is determined whether the second set water level is reached.
  • step 360 is performed to determine that the second set water level is not reached, and step 3120 is performed.
  • step 360 the time T2 to reach the second set water level is saved
  • step 370 the average value of the nth water inlet speed and the average value of the water inlet time are calculated according to the water level and T1, T2, and saved,
  • step 380 the average trend of the n-th to n-th water inflow rate and the average value of the influent time are counted
  • step 390 it is determined whether the average value of the water inlet speed is gradually decreased while the average value of the water inlet time is gradually increased.
  • step 3100 is performed to determine that the average value of the water inlet speed does not gradually decrease or the average value of the water inlet time does not gradually increase, and step 3110 is performed.
  • step 3100 a prompt to block the inlet pipe filter is issued
  • step 3110 the water is normally poured
  • step 3120 it is determined whether the timing time reaches a preset time.
  • step 3130 is executed to determine that the timing time has not reached the preset time, and step 340 is performed.
  • step 3130 the water intake is stopped and a water inflow timeout alarm is issued.
  • the difference from the embodiment 1 is that the average value of the plurality of water inlet speeds and the average value of the water inlet time are simultaneously counted, the accuracy of the diagnosis result of the inlet pipe blockage is ensured, and other failures of the water inlet component are avoided. It is judged that the inlet pipe filter is clogged, and unnecessary replacement or cleaning of the filter is avoided.
  • the embodiment provides a self-diagnosis method for plugging a water inlet filter, comprising:
  • step 410 the nth inflow of water, the flow meter directly measures the average value of the inflow rate of the influent water,
  • step 420 the trend of the average value of the n-thth to the nth water inflow rate is counted
  • step 430 it is determined whether the average value of the water inlet speed is gradually decreased.
  • step 440 is performed to determine that the average value of the water inlet speed does not gradually decrease, and step 450 is performed.
  • step 440 a prompt to block the inlet pipe filter is issued
  • step 450 water is normally introduced.
  • Embodiment 1 The difference from Embodiment 1 is that the average value of the water inlet speed is directly measured by the flow meter, and the method is simple and intuitive.
  • the embodiment further provides a washing machine, which uses any of the solutions provided in the above embodiments 1-4 to determine whether the inlet pipe filter is clogged.
  • the inlet pipe filter of the present disclosure is blocked by the self-diagnosis method, can accurately determine whether the filter is blocked, and reminds the user that the filter is clogged, and the filter is replaced or cleaned in time to ensure the normal use of the washing machine.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Filtration Of Liquid (AREA)
  • Control Of Washing Machine And Dryer (AREA)

Abstract

一种进水管过滤网堵塞自诊断方法，包括：获得并存储设定时间段内以下至少之一：进水的进水速度和进水时间的平均值，统计多个连续的设定时间段内的以下至少之一的变化趋势：所述进水速度和进水时间的平均值的变化趋势，若所述进水速度的平均值在多个连续的设定时间段内出现以下至少之一：逐渐减小和进水时间的平均值在多个连续的设定时间段内逐渐增大，则发出进水管过滤网堵塞的提示。

Description

进水管过滤网堵塞自诊断方法及洗衣机 技术领域
本公开涉及过滤网堵塞检测技术领域，例如涉及一种进水管过滤网堵塞自诊断方法及洗衣机。
背景技术
随着人们生活水平的提高，洗衣机已进入到千家万户，成为最常用的家电产品。一般来说，相关技术中洗衣机的进水管只是简单的连接水龙头和洗衣机，内部无过滤装置，而自来水中往往含有泥沙、重金属等杂质，杂质由进水管进入洗衣机后不仅会使洗衣机的水盒等部件发黄变色，影响美观及使用，还会将衣服染色，造成衣服损伤，无法再穿；另外，对带加热功能的洗衣机来说，水垢等杂质附着在加热管上，时间长了会影响加热效率，造成耗电量增加并降低加热管的寿命。因此，杂质由进水管进入洗衣机后，影响洗衣机的正常使用。
为了防止杂质进入洗衣机，相关技术中在进水管中安装过滤网，通过过滤网截留自来水中的杂质，让衣物的洗涤效果良好，延长洗衣机的使用寿命。但是过滤网长时间使用后容易发生堵塞，当发生堵塞后需及时对过滤网进行清理，否则造成进水时间长等问题。
发明内容
本公开提出一种进水管过滤网堵塞自诊断方法，能够及时提醒用户进水管过滤网堵塞，且堵塞检测的准确性更高。
本公开还提出一种洗衣机，采用上述的进水管过滤网堵塞自诊断方法判断该洗衣机的进水管过滤网是否堵塞。
一种进水管过滤网堵塞自诊断方法，包括：
获得并存储设定时间段内以下至少之一：进水的进水速度和进水时间的平均值，
统计多个连续的设定时间段内的以下至少之一的变化趋势：所述进水速度和进水时间的平均值，
若所述进水速度的平均值在多个连续的设定时间段内出现以下至少之一：逐渐减小和进水时间的平均值在多个连续的设定时间段内逐渐增大，
则发出进水管过滤网堵塞的提示。
可选地，多个连续的设定时间段内的所述进水速度的平均值均小于或等于设定进水速度，所述设定进水速度为自来水标准水压且进水管过滤网无堵塞情况下的进水速度的60％。
可选地，多个连续的设定时间段内的所述进水时间的平均值均大于或等于设定进水时间，所述设定进水时间为自来水标准水压且进水管过滤网无堵塞情况下的进水时间的1.7倍。
可选地，所述设定时间段内的进水次数为1次或多次。
可选地，每次进水设定的进水体积相同，通过计量获得每次进水达到设定的进水体积时的进水时间，根据所述进水体积和所述进水时间计算得到每次进水的进水速度。
可选地，所述进水管向洗衣机内进水，所述洗衣机内设置有第一设定水位和第二设定水位，所述第一设定水位低于所述第二设定水位，所述第一设定水位和第二设定水位之间的体积差不变，通过水位传感器检测洗衣机内的进水水位是否达到第一设定水位或第二设定水位。
可选地，所述洗衣机为波轮洗衣机时，所述第一设定水位为水位传感器的复位水位，所述第二设定水位为波轮上边缘处的水位。
可选地，所述洗衣机为波轮洗衣机时，所述第二设定水位为用户设定的洗涤水位，所述第一设定水位对应的体积比第二设定水位对应的体积小5L。
可选地，所述洗衣机为滚筒洗衣机时，所述第一设定水位为水位传感器的复位水位，所述第二设定水位为内筒下边缘处的水位。
一种洗衣机，采用上述的进水管过滤网堵塞自诊断方法判断该洗衣机的进水管过滤网是否堵塞。
本公开提出的进水管过滤网堵塞自诊断方法，不易出现由于单次的数值浮动而造成的诊断结果不准确。
附图说明
图1是实施例1提供的进水管过滤网堵塞自诊断方法的流程图；
图2是实施例2提供的进水管过滤网堵塞自诊断方法的流程图；
图3是实施例3提供的进水管过滤网堵塞自诊断方法的流程图；
图4是实施例4提供的进水管过滤网堵塞自诊断方法的流程图。
具体实施方式
实施例1
如图1所示，本实施例提供一种进水管过滤网堵塞自诊断方法，包括：
在步骤110中，第n次进水，打开进水阀并计时，
在步骤120中，判断是否达到第一设定水位，
判断达到第一设定水位时，执行步骤130，判断没有达到第一设定水位时，返回步骤110，
在步骤130中，保存到达第一设定水位的时间T1，
在步骤140中，继续计时，
在步骤150中，判断是否达到第二设定水位，
判断达到第二设定水位时，执行步骤160，判断没有达到第二设定水位时，执行步骤1120，
在步骤160中，保存到达第二设定水位的时间T2，
在步骤170中，根据水位和T1、T2计算第n次进水速度的平均值，并保存，
在步骤180中，统计第n-m次到第n次进水速度的平均值的变化趋势，
在步骤190中，判断进水速度的平均值是否逐渐减少，
判断进水速度的平均值逐渐减少时，执行步骤1100，判断进水速度的平均值没有逐渐减少时，执行步骤1110，
在步骤1100中，发出进水管过滤网堵塞的提示，
在步骤1110中，正常进水，
在步骤1120中，判断计时时间是否达到预设时间，
判断计时时间达到预设时间时，执行步骤1130，判断计时时间没有达到预设时间时，执行步骤140。
在步骤1130中，停止进水并发出进水超时报警。
该堵塞自诊断方法中，通过统计多个进水速度的平均值的变化趋势判断进水管的过滤网是否堵塞，该判断不易出现由于单次的进水速度的平均值的浮动而造成的诊断结果不准确。
本实施例中，n和m为非零的自然数，且n大于m，其中m可以为3-10次，通过多次的进水速度的平均值的变化趋势得到准确性较高的诊断结果。
由以上判断可知，进水速度的平均值的变化趋势为随进水次数的增加逐渐减小，则可判断为进水管过滤网堵塞。
本实施例中，设定时间段内的进水次数为1次，进水速度的平均值的变化趋势统计的是多次进水的变化，能够避免单次进水情况下出现的误判情况，进水过程中进水变慢的原因有很多，如：水龙头未完全打开、水压低、排水管放置不对导致边进边排、排水阀未闭合彻底、水位传感异常、进水阀过滤网堵塞、进水电磁阀未完全拉开以及进水管漏水等。通过多次进水的进水速度的平均值的变化趋势判断是否为进水管过滤网堵塞，能够避免由于其他原因导致的进水变慢而做出错误诊断。
该方案判断进水速度的平均值是否逐渐减少的同时，判断第n-m次到第n次的进水速度的平均值是否均小于或等于设定进水速度，设定进水速度为自来水标准水压且进水管过滤网无堵塞情况下的进水速度的60％，若是，则说明从第n-m次到第n次的进水速度的平均值都小于正常的进水速度的60％，能够排除由于正常水压波动造成的影响，保证诊断结果的正确性。
本实施例中，预设时间比T2大，当到达第二设定水位的时间超过预设时间，则可能是由于水龙头未开、停水或水压低等原因造成的，通过步骤1130发出报警以提示用户进行查看解决。
本实施例中，每次进水设定的进水体积相同，通过计量获得每次进水达到设定的进水体积时的进水时间，根据进水体积和所述进水时间计算得到每次进水的进水速度。进水管连接的是洗衣机，洗衣机上设置第一设定水位和第二设定水位，第一设定水位低于所述第二设定水位，第一设定水位和第二设定水位之间的进水体积差不变，通过水位传感器检测洗衣机内的进水水位是否达到第一设定水位或第二设定水位。利用已有的水位传感器进行测量水位后进行计算得到进水速度的平均值，可以避免安装流量计等硬件设备，节省成本。
洗衣机为波轮洗衣机时，第一设定水位为水位传感器的复位水位，第二设定水位为波轮上边缘处的水位，避免与衣物进行大面积的接触；或者所述第二设定水位为用户设定的洗涤水位，所述第一设定水位对应的体积比第二设定水位对应的体积小5L，在第一设定水位时，衣物和水已经能够实现充分的接触，到第二设定水位过程中不会发生衣物吸收过多的水量的情况。
洗衣机为滚筒洗衣机时，第一设定水位为水位传感器的复位水位，第二设定水位为内筒下边缘处的水位。第二设定水位没有达到衣物所在的区域。
以上第一设定水位和第二设定水位的选择均是为了避免被洗涤的衣物的吸水对进水时间的计量和进水速度的计算造成误差。
本实施例中选择每次洗衣的第一次进水时的进水速度的平均值进行统计，这样每次洗衣第一次进水均面向的是没有被浸泡的衣物，每次进水时衣物的吸水量之间的差距减少，避免对进水管过滤网的堵塞诊断结果造成误差。还可以在一次洗衣过程中的每次洗涤、漂洗进水时都对进水速度的平均值进行统计判断，此时可以选择合适的第一设定水位和第二设定水位，以避免衣物吸水性对诊断结果的影响。
实施例2
如图2所示，本实施例提供一种进水管过滤网堵塞自诊断方法，包括：
在步骤210中，第n次进水，打开进水阀并计时，
在步骤220中，判断是否达到第一设定水位，
判断达到第一设定水位时，执行步骤230，判断没有达到第一设定水位时，返回步骤210，
在步骤230中，保存到达第一设定水位的时间T1，
在步骤240中，继续计时，
在步骤250中，判断是否达到第二设定水位，
判断达到第二设定水位时，执行步骤260，判断没有达到第二设定水位时，执行步骤2130，
在步骤260中，保存到达第二设定水位的时间T2，
在步骤270中，根据T1和T2计算进水时间，并保存，
在步骤280中，分别计算第n-m次到第n次、第n-2m次到第n-m次、……第n-pm次到第n-(p-1)m次的进水时间的平均值，
在步骤290中，统计p次进水时间的平均值的变化趋势，
在步骤2100中，判断进水时间的平均值是否逐渐增大，
判断进水时间的平均值逐渐增大时，执行步骤2110，判断进水时间的平均值没有逐渐增大时，执行步骤2120，
在步骤2110中，发出进水管过滤网堵塞的提示，
在步骤2120中，正常进水，
在步骤2130中，判断计时时间是否达到预设时间，
判断计时时间达到预设时间时，执行步骤2140，判断计时时间没有达到预设时间时，执行步骤240。
在步骤2140中，停止进水并发出进水超时报警。
本实施例中，p为不小于2的自然数。
本实施例与实施例1不同之处在于，该堵塞自诊断方法中，通过统计多个进水时间的平均值的变化趋势判断进水管的过滤网是否堵塞，该判断不易出现由于单次的进水时间的平均值的浮动而造成的诊断结果不准确。由以上判断可知，若进水时间的平均值的变化趋势为随进水次数的增加数值逐渐增大，则判断为进水管过滤网堵塞。
当一个设定时间段内进水次数为m次时，那么一个设定时间段内进水时间的平均值为m次进水的进水时间的平均值，通过连续的p个进水时间的平均值的变化趋势进行判断能够更好的体现出进水管过滤网是否堵塞，通过设定时间段内进水多次得出进水时间的平均值的趋势，能够更好的确定进水管过滤网堵塞的故障，保证诊断结果的正确性。
判断进水时间的平均值是否逐渐增大的同时，判断以上p个进水时间的平均值是否均大于或等于设定进水时间，设定进水时间为自来水标准水压且进水管过滤网无堵塞情况下的进水时间的1.7倍，能够排除由于正常水压波动造成的影响。本实施例中设定进水时间可以为3min。
实施例3
如图3所示，本实施例提供一种进水管过滤网堵塞自诊断方法，包括：
在步骤310中，第n次进水，打开进水阀并计时，
在步骤320中，判断是否达到第一设定水位，
判断达到第一设定水位时，执行步骤330，判断没有达到第一设定水位时，返回步骤310，
在步骤330中，保存到达第一设定水位的时间T1，
在步骤340中，继续计时，
在步骤350中，判断是否达到第二设定水位，
判断达到第二设定水位时，执行步骤360，判断没有达到第二设定水位时，执行步骤3120，
在步骤360中，保存到达第二设定水位的时间T2，
在步骤370中，根据水位和T1、T2计算第n次进水速度的平均值和进水时间的平均值，并保存，
在步骤380中，统计第n-m次到第n次进水速度的平均值和进水时间的平均值的变化趋势，
在步骤390中，判断是否进水速度的平均值逐渐减少同时进水时间的平均值逐渐增加，
判断进水速度的平均值逐渐减少同时进水时间的平均值逐渐增加时，执行步骤3100，判断进水速度的平均值没有逐渐减少或进水时间的平均值没有逐渐增加时，执行步骤3110，
在步骤3100中，发出进水管过滤网堵塞的提示，
在步骤3110中，正常进水，
在步骤3120中，判断计时时间是否达到预设时间，
判断计时时间达到预设时间时，执行步骤3130，判断计时时间没有达到预设时间时，执行步骤340。
在步骤3130中，停止进水并发出进水超时报警。
与实施例1不同之处在于，同时统计多个进水速度的平均值和进水时间的平均值的变化趋势，保证进水管是否堵塞的诊断结果的准确性，避免将进水组件的其他故障判断为进水管过滤网堵塞，避免不必要的更换或清理过滤网。
实施例4
如图4所示，本实施例提供一种进水管过滤网堵塞自诊断方法，包括：
在步骤410中，第n次进水，由流量计直接测量获得该次进水的进水速度的平均值，
在步骤420中，统计第n-m次到第n次进水速度的平均值的变化趋势，
在步骤430中，判断进水速度的平均值是否逐渐减少，
判断进水速度的平均值逐渐减少时，执行步骤440，判断进水速度的平均值没有逐渐减少时，执行步骤450，
在步骤440中，发出进水管过滤网堵塞的提示，
在步骤450中，正常进水。
与实施例1不同之处在于通过流量计直接测量获得进水速度的平均值，方法简单、直观。
本实施例还提供一种洗衣机，采用上述实施例1-4提供的任意一种方案判断进水管过滤网是否堵塞。
工业实用性
本公开的进水管过滤网堵塞自诊断方法，能够准确的判断过滤方是否堵塞， 并提醒用户过滤网堵塞，及时更换或清洗过滤网，保证了洗衣机的正常使用。

Claims (10)

  1. 一种进水管过滤网堵塞自诊断方法，包括：
    获得并存储设定时间段内以下至少之一：进水的进水速度和进水时间的平均值，统计多个连续的设定时间段内的以下至少之一的变化趋势：所述进水速度和进水时间的平均值，若所述进水速度的平均值在多个连续的设定时间段内出现以下至少之一：逐渐减小和进水时间的平均值在多个连续的设定时间段内逐渐增大，则发出进水管过滤网堵塞的提示。
  2. 根据权利要求1所述的进水管过滤网堵塞自诊断方法，其中，多个连续的设定时间段内的所述进水速度的平均值均小于或等于设定进水速度，所述设定进水速度为自来水标准水压且进水管过滤网无堵塞情况下的进水速度的60％。
  3. 根据权利要求1所述的进水管过滤网堵塞自诊断方法，其中，多个连续的设定时间段内的所述进水时间的平均值均大于或等于设定进水时间，所述设定进水时间为自来水标准水压且进水管过滤网无堵塞情况下的进水时间的1.7倍。
  4. 根据权利要求1-3任意一项所述的进水管过滤网堵塞自诊断方法，其中，所述设定时间段内的进水次数为1次或多次。
  5. 根据权利要求4所述的进水管过滤网堵塞自诊断方法，其中，每次进水设定的进水体积相同，通过计量获得每次进水达到设定的进水体积时的进水时间，根据所述进水体积和所述进水时间计算得到每次进水的进水速度。
  6. 根据权利要求5所述的进水管过滤网堵塞自诊断方法，其中，所述进水管向洗衣机内进水，所述洗衣机内设置有第一设定水位和第二设定水位，所述第一设定水位低于所述第二设定水位，所述第一设定水位和第二设定水位之间的体积差不变，通过水位传感器检测洗衣机内的进水水位是否达到第一设定水位或第二设定水位。
  7. 根据权利要求6所述的进水管过滤网堵塞自诊断方法，其中，所述洗衣机为波轮洗衣机时，所述第一设定水位为水位传感器的复位水位，所述第二设定水位为波轮上边缘处的水位。
  8. 根据权利要求6所述的进水管过滤网堵塞自诊断方法，其中，所述洗衣机为波轮洗衣机时，所述第二设定水位为用户设定的洗涤水位，所述第一设定水位对应的体积比所述第二设定水位对应的体积小5L。
  9. 根据权利要求6所述的进水管过滤网堵塞自诊断方法，其中，所述洗衣机为滚筒洗衣机时，所述第一设定水位为水位传感器的复位水位，所述第二设 定水位为内筒下边缘处的水位。
  10. 一种洗衣机，采用权利要求1-9任意一项所述的进水管过滤网堵塞自诊断方法判断该洗衣机的进水管过滤网是否堵塞。
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