A cleaning method and cleaning machine of a waterless flow sensor

Abstract

The present invention relates to a cleaning method for a cleaning machine without a water flow sensor. When the cleaning machine starts working, a starting motor is controlled to open a drain valve in the cleaning machine to perform drainage work; after drainage is completed, the drain valve is controlled to be closed, and then the water inlet valve is controlled to be opened, and the time point Ts of opening the water inlet valve is recorded; the motor power P when the motor is working is obtained in real time; when the motor power is stabilized at a stable power Pw, the time point Tw when the motor just reaches the stable power Pw is recorded; the water flow rate V0 of the water inlet of the cleaning machine is calculated according to the motor power data collected in the time interval from the time point Ts to the time point Tw; according to the water flow rate V0, the water inlet of the cleaning machine is controlled to reach a preset water inlet volume for the current cleaning work, and then the water inlet valve is controlled to be closed and the cleaning work is controlled. The present invention relates to a cleaning machine using this method. The cleaning machine and its cleaning method can ensure the normal water inlet of the cleaning machine on the basis of no flow data, and have low cost and low maintenance rate.

Description

Technical Field

[0001] The invention relates to a cleaning method of a cleaning machine for a waterless flow sensor, and also relates to a cleaning machine using the method. Background Art

[0002] The cleaning machine is used in the kitchen to clean tableware. When the cleaning machine performs cleaning work, there are requirements for the amount of water used for cleaning, so it is necessary to detect the water intake during the operation of the cleaning machine. The cleaning machine in the prior art usually uses a water flow sensor to detect and calculate the water intake, and then performs the cleaning work. For example, the Chinese utility model patent "A fully intelligent ultrasonic dishwasher" with the authorization announcement number CN203234707U (application number 201320091440.3) discloses a dishwasher that uses a water intake flow sensor to detect the water intake flow to obtain the water intake. However, the price of the water flow sensor is relatively high, which makes the cost of the cleaning machine high. And when the water flow sensor fails, the cleaning machine cannot perform normal cleaning work. In addition, in conjunction with the use of the water flow sensor, a turbine assembly is usually set, and the turbine assembly is easy to get stuck during operation, and then mistakenly believed to be without water, which increases the maintenance rate of the cleaning machine.

[0003] In addition, the washing machine will detect the water level information in the washing machine during use to avoid water shortage or overflow. For example, the Chinese utility model patent "Overflow Detection Structure and Dishwasher with It" with authorization announcement number CN213189413U (application number 202021882127.8) discloses a dishwasher that uses a water flow sensor to detect the water level. At the same time, in order to avoid overflow detection in the event of failure of the water flow sensor, an overflow detection electrode is provided on the bottom shell, but hardware failure still occurs. Summary of the invention

[0004] The first technical problem to be solved by the present invention is to provide a cleaning machine without a water flow sensor that can effectively obtain the water flow velocity without using a water flow sensor, thereby meeting the cleaning work.

[0005] The second technical problem to be solved by the present invention is to provide a cleaning machine using the above-mentioned cleaning method in view of the above-mentioned prior art.

[0006] The technical solution adopted by the present invention to solve the above-mentioned first technical problem is: a cleaning method of a cleaning machine without a water flow sensor, characterized in that it comprises the following steps:

[0007] The cleaning machine starts working, controls the starting motor, and controls the opening of the drain valve in the cleaning machine to perform drainage work;

[0008] After the drainage is completed, the drainage valve is controlled to be closed, and then the water inlet valve is controlled to be opened, and the time point Ts when the water inlet valve is opened is recorded;

[0009] The motor power P is obtained in real time when the motor is working; when the motor power is stabilized at the stable power Pw, the time point Tw when the motor just reaches the stable power Pw is recorded;

[0010] Calculate the water flow rate V0 of the washing machine according to the motor power data collected in the time interval from time point Ts to time point Tw;

[0011] According to the water flow rate V0, the water inlet of the cleaning machine is controlled to a preset water inlet volume for the current cleaning work, and then the water inlet valve is controlled to be closed and the cleaning work is controlled.

[0012] To facilitate the detection of drainage failures, before the cleaning machine leaves the factory, the pre-stored value V00 of the water flow velocity is detected according to the method of obtaining V0;

[0013] During the use of the cleaning machine, if a drainage failure occurs, the drainage valve is controlled to be closed, and the water inlet is controlled according to the pre-stored value V00 of the water flow rate, and then the cleaning work is carried out.

[0014] In order to ensure that the cleaning machine can perform cleaning work normally, in the event of a drainage failure, the water inlet is controlled according to the pre-stored value V00 of the water flow rate to reach the set water inlet for this cleaning work.

[0015] Preferably, the method for judging the end of drainage is: when the drainage work is being performed, the motor power P is obtained in real time, and the drainage time Tp is timed at the same time;

[0016] Determine whether P and Tp meet the following conditions: P≤Po and Tp≤To, where Po is the preset minimum power threshold of the motor for drainage; To is the preset time threshold of the motor for drainage; if yes, determine that drainage is completed and control the closing of the drainage valve;

[0017] If situation A occurs: when the drainage time exceeds To and P is still greater than Po, the motor is restarted to drain the water; if situation A occurs consecutively for a set number of times B, B ≥ 2, a drainage fault is determined to have occurred and a drainage fault alarm is issued.

[0018] In order to avoid overflow, overflow detection is realized without corresponding detection devices, and overflow fault detection of the cleaning machine is performed before drainage;

[0019] Before the motor starts and the drain valve is started, the motor power P is obtained in real time, and P is compared with the set overflow fault power threshold Py. If P≥Py, it is judged that overflow may occur, and then an overflow fault alarm is issued.

[0020] In order to judge the abnormal situation during the water inlet process and give an alarm in time, during the use of the cleaning machine, it is judged whether the water inlet flow is too small while the water is inlet;

[0021] After the water inlet valve is opened, before the motor power P reaches the stable power Pw, calculate the real-time water flow velocity V. If the difference between V and the pre-stored water flow velocity value V00 is greater than the preset difference threshold ΔV, restart the water inlet valve. If the difference between V and the pre-stored water flow velocity value V00 obtained by C consecutive calculations is still greater than the preset difference threshold ΔV, it is determined that the water inlet flow rate is too small, and an alarm for too small water inlet flow rate is issued; where C represents the number of times the water inlet valve is restarted, C≥1.

[0022] In order to detect water leakage during the cleaning process of the cleaning machine, the cleaning machine obtains motor power data in real time during the cleaning process. If the motor power data continues to decrease and the decrease in unit time exceeds the set decrease threshold, it is judged that a water leakage occurs and a water leakage alarm is issued.

[0023] In order to ensure safe cleaning when the motor performance decreases, during the water inlet process, if the stable power Pw is less than the minimum value Px of the preset stable power range, the cleaning machine is controlled to restart. When the number of restarts of the cleaning machine reaches the set restart number D, the cleaning machine is controlled to work according to the last water inlet flow rate when the motor performance is normal;

[0024] At the same time, when the cleaning machine is performing cleaning work, the real-time motor power P is compared with the set water power threshold Pz; if P≥Pz, then if heating is required during the current cleaning process, the heating device in the cleaning machine is normally turned on to perform the cleaning work; if P<Pz, the heating device in the cleaning machine is controlled to remain in the closed state and the cleaning work is performed.

[0025] Preferably, if the cleaning machine performs cleaning work N times in a row when P<Pz and the heating device remains in the off state, it is determined that the motor has an abnormality and a motor abnormality alarm is issued, where N is a positive integer greater than or equal to 2, and N represents the number of motor abnormality judgments.

[0026] In order to realize overflow detection in the case of motor abnormality, when it is judged that the motor is abnormal, when the cleaning machine is not working, the drying motor in the cleaning machine is controlled to be turned on according to the set time interval, and the rotation speed R of the drying motor is detected and obtained, and R is compared with the pre-stored minimum normal speed threshold R0 of the drying motor. If R<R0, the control will issue an overflow warning.

[0027] In order to realize overflow warning when the cleaning machine is not working, when the cleaning machine is not working, the motor is controlled to start according to the set time interval, and the motor power P is detected and obtained. P is compared with the set water power threshold Pz. If P≥Pz, an overflow warning is issued.

[0028] In order to avoid overflow caused by excessive water remaining in the cleaning machine when the cleaning machine suddenly stops, the real-time water flow rate V is calculated during the water intake process of the cleaning machine. If a shutdown occurs, the water intake into the cleaning machine is calculated based on V, and then the corresponding drainage time is calculated based on the water intake. Then, the drain valve is controlled to open according to the drainage time to drain the water.

[0029] The technical solution adopted by the present invention to solve the above-mentioned second technical problem is: a cleaning machine applying the aforementioned method, characterized in that: it includes a body with a water inlet and a drain outlet, a motor, a drying motor, a heating device, and a control circuit board arranged in the body, a water inlet valve arranged on the water inlet, and a drain valve arranged on the drain outlet, and the motor, drying motor, heating device, water inlet valve, and drain valve are all electrically connected to the control circuit board by signals.

[0030] Compared with the prior art, the advantages of the present invention are: the cleaning method of the cleaning machine without water flow sensor in the present invention can detect the water flow velocity without setting a water flow sensor, thereby ensuring the normal operation of the water inlet of the cleaning machine. In addition, the cleaning machine using the method has low cost and low maintenance rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a flow chart for obtaining the pre-stored value V00 of the water flow speed during the testing phase of the cleaning machine in an embodiment of the present invention.

[0032] Figure 2 The figure is a flow chart of a cleaning method of a waterless flow sensor cleaning machine in an embodiment of the present invention.

[0033] Figure 3 This is a flow chart of judging the performance of a motor in a cleaning machine according to an embodiment of the present invention. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below with reference to the accompanying drawings.

[0035] The cleaning method of the cleaning machine without a water flow sensor in this embodiment can be used in a cleaning machine that is not equipped with a water flow sensor. This cleaning machine includes a body with a water inlet and a drain, a motor, a drying motor, a heating device, a control circuit board arranged in the body, a water inlet valve arranged on the water inlet, a drain valve arranged on the drain, and the motor, the drying motor, the heating device, the water inlet valve, and the drain valve are all connected to the control circuit board by electrical signals. The heating device can be a heating plate arranged at the bottom of the body. Some cleaning procedures of the cleaning machine need to control the heating device to turn on to heat the water in the body, and then perform the cleaning work.

[0036] The cleaning method of the cleaning machine without water flow sensor generally includes the following control methods under several time stages.

[0037] 1) The testing phase of the cleaning machine before it leaves the factory.

[0038] When the cleaning machine is tested for cleaning without any faults before leaving the factory, when the cleaning machine is filled with water, the motor in the cleaning machine is controlled to start working, the water inlet valve is controlled to open, and the drain valve is controlled to be in a closed state. Using a water flow with a known water flow velocity, the motor power will change due to the influence of the water flow during the water inlet process of the cleaning machine. During the water inlet process, the motor power is collected in real time. In the early stage of water inlet, the motor power waveform is close to a linear segment with an inclined rise. When the amount of water in the machine reaches a certain amount, the motor power tends to be stable. After many tests, the relationship between the motor power and the water flow velocity in the rising linear segment or the calculation function between the two can be obtained, and the calculation function can be pre-stored in the control circuit board of the cleaning machine. At the same time, a more reasonable stable power interval under the stable state of the motor power can be obtained as a preset stable power interval, and then stored in the control circuit board. In this embodiment, Px is the minimum value of the preset stable power interval.

[0039] like Figure 1 As shown, the water source normally used in the user's home is then introduced into the cleaning machine, and the corresponding water flow velocity is calculated according to the pre-stored calculation function, thereby forming a pre-stored water flow velocity value V00 which is pre-stored in the control circuit board.

[0040] The acquisition process of V00 is as follows: the cleaning machine starts working, controls the starting motor, and controls the opening of the drain valve in the cleaning machine to drain water. After the drainage is completed, the drain valve is controlled to be closed, and then the water inlet valve is controlled to be opened, and the time point Ts when the water inlet valve is opened is recorded. The motor power P when the motor is working is obtained in real time. When the motor power stabilizes at the stable power Pw, the time point Tw when the motor just reaches the stable power Pw is recorded. The criterion for Pw stability is that Pw is maintained within the stable power range and the power change rate is less than a small value.

[0041] According to the motor power data collected in the time interval from time point Ts to time point Tw, the water flow rate V00 of the washing machine is calculated based on the pre-stored calculation function, and V00 is stored in the control circuit board as the pre-stored value of the water flow rate.

[0042] In addition, since the washing machine needs to be drained first after starting, it is avoided that water is added to the washing machine when there is water in it, and accordingly the situation of excessive water or overflow in the washing machine is avoided. During the test, the reasonable duration of the washing machine draining water and the reasonable power corresponding to the motor are statistically recorded, and then reasonable calculations are made to determine that Po is the preset minimum power threshold of the motor for draining water, and To is the preset time threshold of the motor for draining water.

[0043] 2) After the cleaning machine leaves the factory normally, the user uses the cleaning machine.

[0044] 2.1. Drainage stage after the cleaning machine is started.

[0045] like Figure 2 As shown, the cleaning machine starts working and controls the starting motor.

[0046] Since the cleaning machine is not equipped with a water flow sensor, the water amount in the base cannot be directly determined. If too much water is injected into the machine body when the cleaning machine is shut down or due to water system problems, there is a risk of overflow. At this time, overflow detection must be performed first to effectively eliminate the overflow.

[0047] After the cleaning machine is started, it will detect the overflow fault of the cleaning machine before draining. Specifically, when the motor is started and before the drain valve is started, the motor power P is obtained in real time, and P is compared with the set overflow fault power threshold Py. If P≥Py, it is determined that overflow may occur, and then an overflow fault alarm is issued. The cleaning machine can be controlled to stop accordingly. After seeing the overflow fault alarm, the user can drain the water in the machine in various ways.

[0048] If there is no overflow fault alarm, the control opens the drain valve in the cleaning machine to perform drainage work.

[0049] When draining water, the motor power P is obtained in real time, and the draining time Tp is timed to determine whether P and Tp meet the following conditions: P≤Po and Tp≤To, that is, P≤Po occurs when the draining time does not reach To; if so, the draining is determined to be completed and the drain valve is controlled to be closed. This method can also be used to determine whether the draining is completed during the test phase.

[0050] If situation A occurs: when the drainage time Tp exceeds To, P is still greater than Po, there may be a drainage blockage. At this time, the motor can be restarted to try drainage again. In this embodiment, the motor is restarted to drain. If the number of consecutive occurrences of situation A reaches the set number B, B ≥ 2, and B = 3 in this embodiment. It is determined that a drainage fault has occurred and a drainage fault alarm is issued. The user checks the situation inside the cleaning machine according to the drainage fault alarm to see if there is any difficult-to-clean dirt blocking the drainage port of the cleaning machine, and takes corresponding measures accordingly.

[0051] In the event of a drainage failure, if the user does not respond, the cleaning machine can be directly controlled to stop.

[0052] Since the cleaning machine usually has a drainage test after the cleaning is completed, the cleaning machine can start working, which usually indicates that there is no drainage failure after the previous work is completed. Based on this, the cleaning machine can also be controlled to continue the subsequent water intake and cleaning work. In this embodiment, when it is judged that there is a drainage failure, the motor power is no longer used as a parameter for calculating the water flow rate, and the drainage valve is controlled to be closed, and then the water intake is controlled according to the pre-stored value V00 of the water flow rate to reach the set water intake of this cleaning work, and then the cleaning work is controlled.

[0053] 2.2. The water inlet stage after the cleaning machine is started.

[0054] Control to open the water inlet valve, and record the time point Ts when the water inlet valve is opened; obtain the motor power P when the motor is working in real time; after the motor power stabilizes at the stable power Pw, record the time point Tw when the motor just reaches the stable power Pw; calculate the water flow velocity V0 of the water inlet to the cleaning machine according to the motor power data collected in the time interval from the time point Ts to the time point Tw and the pre-stored calculation function; the method for obtaining V0 is the same as the aforementioned method for obtaining V00.

[0055] According to the water flow rate V0, the water inlet of the cleaning machine is controlled to a preset water inlet volume for the current cleaning work, and then the water inlet valve is controlled to be closed and the cleaning work is controlled.

[0056] During the use of the cleaning machine, determine whether the water flow is too small while the water is inletting;

[0057] After the water inlet valve is opened, before the motor power P reaches the stable power Pw, calculate the real-time water flow velocity V. If the difference between V and the pre-stored water flow velocity value V00 is greater than the preset difference threshold ΔV, restart the water inlet valve. If the difference between V and the pre-stored water flow velocity value V00 obtained by C consecutive calculations is still greater than the preset difference threshold ΔV, it is determined that the water inlet flow rate is too small, and an alarm for too small water inlet flow rate is issued; where C represents the number of times the water inlet valve is restarted, C≥1.

[0058] During the water intake process of the cleaning machine, the real-time water flow velocity V is calculated. The real-time water flow velocity V can be calculated based on the currently acquired motor power data and sampling time, and then calculated using the pre-stored calculation function. If the machine stops, the water intake in the cleaning machine is calculated based on V, and then the corresponding drainage time is calculated based on the water intake, and then the drainage valve is controlled to open according to the drainage time to perform drainage work.

[0059] 2.3 Cleaning work phase after the cleaning machine is started.

[0060] like Figure 2 As shown, when the cleaning machine is cleaning, it obtains motor power data in real time. If the motor power data continues to decrease and the decrease in unit time exceeds the set decrease threshold, it is judged that there is a water leak and a water leak alarm is issued. In the case of a water leak, in order to ensure the safety of the cleaning machine, the heating device in the cleaning machine can be controlled to stop working to avoid dry burning, and at the same time, water can be added to the machine body.

[0061] 2.4 The shutdown phase after the cleaning machine finishes work.

[0062] When the cleaning machine is not working, it is possible that water overflow occurs in the machine body due to a water inlet valve failure or human factors. In this embodiment, the method for detecting water overflow when the cleaning machine is not working is as follows: the motor is turned on according to a set time interval, and the motor power P is detected and obtained, and P is compared with the set water power threshold Pz. If P≥Pz, a water overflow warning is issued. The water power threshold Pz is preferably set to a value slightly lower than Px, so that it can effectively determine the situation where water begins to appear in the machine body and avoid more serious water overflow. The set time interval is reasonably set according to needs, such as once every 6 hours.

[0063] 2.5 The cleaning machine is in the post-long term use stage.

[0064] After the motor has been used for a long time, its performance will decline. When the cleaning machine is working, the motor power will change compared to when the motor performance is good, so it is necessary to judge the motor performance.

[0065] like Figure 3As shown, during the water intake process, if the stable power Pw is less than the minimum value Px of the preset stable power interval, it may be caused by the decline in motor performance. At this time, the cleaning machine is controlled to restart. When the number of restarts of the cleaning machine reaches the set restart start number D, Pw is still less than the minimum value Px of the preset stable power interval, which means that the motor is not an occasional performance problem, but the motor performance has indeed declined. At this time, the cleaning machine is controlled to work at the last water intake flow rate when the motor performance is normal, that is, the cleaning machine is controlled to complete the water intake work at the last water intake flow rate when the motor stable power Pw is in the preset stable power interval.

[0066] Then, when the cleaning machine performs subsequent cleaning work, the real-time motor power P is compared with the set water power threshold Pz. If P≥Pz, it means that the motor performance has not deteriorated seriously. At this time, if heating is required during the current cleaning process, the heating device in the cleaning machine is normally turned on to perform the cleaning work. If P<Pz, the motor may have a more serious performance degradation problem. At this time, in order to ensure the safety of the cleaning machine, the heating device in the cleaning machine is controlled to remain in the closed state while the cleaning work is performed.

[0067] During the use of the cleaning machine, if the cleaning machine is used for N consecutive times with P < Pz and the heating device is kept off, the motor is judged to be abnormal and a motor abnormality alarm is issued, where N is a positive integer greater than or equal to 2, and N represents the number of motor abnormality judgments. The user can report a repair based on the motor abnormality alarm.

[0068] When the motor is judged to be abnormal, when the washing machine is not working, the drying motor in the washing machine is turned on at a set time interval to perform overflow warning detection. Specifically, the rotation speed R of the drying motor is detected and obtained, and R is compared with the pre-stored minimum normal rotation speed threshold R0 of the drying motor. If R < R0, the overflow warning is controlled.

[0069] The cleaning method of the cleaning machine without water flow sensor in the present invention does not need to set a water flow sensor. When the water flow data cannot be obtained, the motor power is used to detect and calculate the water flow speed, thereby ensuring the normal operation of the water inlet of the cleaning machine. On this basis, the motor power data can also be used to judge various abnormal situations in the cleaning machine. The cleaning machine using this method has low cost and low maintenance rate.

[0070] In addition, the cleaning method of the cleaning machine without a water flow sensor in the present invention can also be applied to a cleaning machine with a water flow sensor and a water level sensor. When the water flow sensor and the water level sensor fail, the method can be used to work.

Claims

1. A method for cleaning a waterless flow sensor cleaning machine, characterized in that: The following steps are involved: The cleaning machine starts working, controls the starting motor, and controls the opening of the drain valve in the cleaning machine to perform drainage work; After the drainage is completed, the drainage valve is controlled to be closed, and then the water inlet valve is controlled to be opened, and the time point Ts when the water inlet valve is opened is recorded; The motor power P is obtained in real time when the motor is working; when the motor power is stabilized at the stable power Pw, the time point Tw when the motor just reaches the stable power Pw is recorded; Calculate the water flow rate V0 of the washing machine according to the motor power data collected in the time interval from time point Ts to time point Tw; According to the water flow rate V0, the water inlet of the cleaning machine is controlled to a preset water inlet volume for the current cleaning work, and then the water inlet valve is controlled to be closed and the cleaning work is controlled; During the use of the cleaning machine, determine whether the water flow is too small while the water is inletting; After the water inlet valve is opened, before the motor power P reaches the stable power Pw, calculate the real-time water flow velocity V. If the difference between V and the pre-stored water flow velocity value V00 is greater than the preset difference threshold ΔV, restart the water inlet valve. If the difference between V and the pre-stored water flow velocity value V00 obtained by C consecutive calculations is still greater than the preset difference threshold ΔV, it is determined that the water inlet flow rate is too small, and an alarm for too small water inlet flow rate is issued; where C represents the number of times the water inlet valve is restarted, C≥1.

2. The cleaning method of the waterless flow sensor cleaning machine according to claim 1, characterized in that: Before the cleaning machine leaves the factory, the pre-stored value V00 of the water flow velocity is detected and obtained according to the method of obtaining V0; During the use of the cleaning machine, if a drainage failure occurs, the drainage valve is controlled to be closed, and the water inlet is controlled according to the pre-stored value V00 of the water flow rate, and then the cleaning work is carried out.

3. The cleaning method of the waterless flow sensor cleaning machine according to claim 2, characterized in that: In case of drainage failure, the water inflow is controlled according to the pre-stored value V00 of the water flow rate to reach the set water inflow for this cleaning operation.

4. The cleaning method of the waterless flow sensor cleaning machine according to any one of claims 1 to 3, characterized in that: The method for judging the end of drainage is as follows: when the drainage work is being carried out, the motor power P is obtained in real time, and the drainage time Tp is timed at the same time; Determine whether P and Tp meet the following conditions: P≤Po and Tp≤To, where Po is the preset minimum power threshold of the motor for drainage; To is the preset time threshold of the motor for drainage; if yes, determine that drainage is completed and control the closing of the drainage valve; If situation A occurs: when the drainage time exceeds To and P is still greater than Po, the motor is restarted to drain the water; if situation A occurs consecutively for a set number of times B, B ≥ 2, a drainage fault is determined to have occurred and a drainage fault alarm is issued.

5. The cleaning method of the waterless flow sensor cleaning machine according to any one of claims 1 to 3, characterized in that: Carry out overflow fault detection of the cleaning machine before draining; Before the motor starts and the drain valve is started, the motor power P is obtained in real time, and P is compared with the set overflow fault power threshold Py. If P≥Py, it is judged that overflow may occur, and then an overflow fault alarm is issued.

6. The cleaning method of the waterless flow sensor cleaning machine according to any one of claims 1 to 3, characterized in that: When the cleaning machine is performing cleaning work, it obtains motor power data in real time. If the motor power data continues to decrease and the decrease in unit time exceeds the set decrease threshold, it is judged that a water leak occurs and a water leak alarm is issued.

7. The cleaning method of a waterless flow sensor cleaning machine according to any one of claims 1 to 3, characterized in that: During the water inlet process, if the stable power Pw is less than the minimum value Px of the preset stable power range, the cleaning machine is controlled to restart. When the number of restarts of the cleaning machine reaches the set restart number D, the cleaning machine is controlled to work according to the last water inlet flow rate when the motor performance is normal; At the same time, when the cleaning machine is performing cleaning work, the motor power P obtained in real time is compared with the set water power threshold Pz; if P≥Pz, then if heating is required during the current cleaning process, the heating device in the cleaning machine is normally turned on to perform the cleaning work; If P<Pz, the heating device in the cleaning machine is controlled to remain in the closed state and the cleaning work is carried out.

8. The cleaning method of the waterless flow sensor cleaning machine according to claim 7, characterized in that: If the cleaning machine performs cleaning work N times in a row when P<Pz and the heating device remains in the off state, it is determined that the motor has an abnormal condition and a motor abnormality alarm is issued, where N is a positive integer greater than or equal to 2, and N represents the number of motor abnormality judgments.

9. The cleaning method of the waterless flow sensor cleaning machine according to claim 8, characterized in that: When it is determined that the motor is abnormal, when the cleaning machine is not working, the drying motor in the cleaning machine is turned on at a set time interval, and the rotation speed R of the drying motor is detected and obtained. R is compared with the pre-stored minimum normal rotation speed threshold R0 of the drying motor. If R<R0, the control issues a water overflow warning.

10. The cleaning method of a waterless flow sensor cleaning machine according to any one of claims 1 to 3, characterized in that: When the cleaning machine is not working, the motor is turned on at a set time interval, and the motor power P is detected and obtained. P is compared with the set water power threshold Pz. If P≥Pz, an overflow warning is issued.

11. The cleaning method of a waterless flow sensor cleaning machine according to any one of claims 1 to 3, characterized in that: During the water intake process of the cleaning machine, the real-time water flow rate V is calculated. If the machine stops, the water intake volume in the cleaning machine is calculated based on V, and then the corresponding drainage time is calculated based on the water intake volume. Then, the drain valve is controlled to open according to the drainage time to perform drainage work.

12. A cleaning machine using the method according to any one of claims 1 to 11, characterized in that: The utility model comprises a body with a water inlet and a drain outlet, a motor, a drying motor, a heating device, a control circuit board arranged in the body, a water inlet valve arranged on the water inlet, and a drain valve arranged on the drain outlet, wherein the motor, the drying motor, the heating device, the water inlet valve, and the drain valve are all connected with the control circuit board by electrical signals.

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